How Injection Molding Glass fiber reinforced nylon combustion solution

**Injection Molding of Glass Fiber Reinforced Nylon: A Comprehensive Solution for Combustion Applications**  

Injection molding has long been a cornerstone of modern manufacturing, offering unparalleled precision, scalability, and efficiency. When combined with advanced materials like glass fiber reinforced nylon, this technique opens doors to innovative solutions for demanding applications, particularly in combustion systems. In this blog post, we’ll explore how this composite material is revolutionizing the field of injection molding and why it is an ideal choice for combustion-related components.

### Understanding Glass Fiber Reinforced Nylon  

Glass fiber reinforced nylon is a composite material consisting of nylon resin embedded with finely chopped glass fibers. Nylon, a synthetic polymer, is already well-regarded for its durability, flexibility, and chemical resistance. The addition of glass fibers enhances its mechanical properties, including tensile strength, stiffness, and thermal stability. This makes it particularly suited for applications where materials must endure high temperatures, mechanical stress, and aggressive chemical environments.

### Why Glass Fiber Reinforced Nylon for Combustion Applications?  

Combustion systems—whether in engines, industrial burners, or heating systems—operate under extreme conditions. Components in these systems must withstand elevated temperatures, pressure fluctuations, and exposure to corrosive gases. Glass fiber reinforced nylon addresses these challenges through its unique combination of properties:

1. **High Heat Resistance**: The material maintains structural integrity at temperatures exceeding those tolerated by standard plastics. This makes it ideal for components like intake manifolds and exhaust system parts.

2. **Mechanical Strength**: The reinforced fibers provide enhanced rigidity and durability, allowing parts to resist deformation under mechanical loads.

3. **Chemical Resistance**: Nylon naturally resists degradation from oils, fuels, and other chemicals commonly found in combustion environments.

4. **Lightweight Design**: Compared to metals traditionally used in combustion systems, glass fiber reinforced nylon offers a lighter alternative without sacrificing performance. This contributes to improved fuel efficiency in automotive applications.

5. **Cost Efficiency**: Injection molding with this composite material is highly cost-effective for producing complex geometries at scale.

### The Injection Molding Process  

The injection molding process for glass fiber reinforced nylon follows similar steps to traditional injection molding but requires specialized considerations due to the material’s unique properties:

1. **Material Preparation**: The nylon resin and glass fibers are blended to ensure a uniform distribution of reinforcement throughout the polymer matrix.

2. **Melt Processing**: The blend is melted at high temperatures within the injection molding machine. Precise temperature control is critical to prevent degradation of the polymer or fibers.

3. **Mold Design**: Molds must be engineered to accommodate the flow characteristics of glass fiber reinforced nylon, ensuring even distribution and minimizing fiber breakage during injection.

4. **Cooling and Solidification**: Once injected into the mold cavity, the material cools and solidifies into the desired shape. Cooling rates must be carefully managed to avoid warping or internal stresses.

5. **Post-Processing**: Finished parts may undergo additional treatments such as trimming, surface finishing, or annealing to enhance their performance characteristics.

### Applications in Combustion Systems  

Glass fiber reinforced nylon has proven its value across a wide range of combustion-related applications. Common examples include:

- **Automotive Components**: From air intake manifolds to engine covers, this material delivers lightweight strength and heat resistance critical for modern vehicles.

- **Industrial Burners**: Structural components in burners benefit from the material’s ability to withstand prolonged exposure to high temperatures.

- **Heating Systems**: Parts like flue gas ducts and blower housings leverage the material’s chemical resistance and durability.

### Challenges and Considerations  

Despite its advantages, working with glass fiber reinforced nylon does present some challenges. For example, its abrasive nature can cause wear on injection molding equipment over time. Additionally, achieving consistent fiber orientation during molding requires meticulous design and process control. Manufacturers must also account for potential shrinkage or warping during cooling.

### Conclusion  

Glass fiber reinforced nylon is a game-changer for injection molding applications in combustion systems. Its unique combination of heat resistance, mechanical strength, chemical durability, and lightweight properties make it an ideal choice for demanding environments. By leveraging advanced injection molding techniques and addressing material-specific challenges, manufacturers can unlock new possibilities for innovation in combustion technology.

As industries continue to push the boundaries of performance and efficiency, materials like glass fiber reinforced nylon will undoubtedly play a pivotal role in shaping the future of manufacturing.

Automotive Clip And Fastener manufacturer in China

**Exploring Automotive Clip and Fastener Manufacturers in China**  

When it comes to the world of automotive manufacturing, every detail matters. From the sleek design of a car’s exterior to the precise engineering under the hood, every component plays a crucial role in ensuring performance, safety, and durability. Among these components, automotive clips and fasteners might not grab headlines, but they are indispensable in holding everything together—literally!  

China has emerged as a global leader in manufacturing, including the production of automotive clips and fasteners. If you’ve ever wondered why China is such a hub for these essential parts or what makes their products stand out, let’s take a closer look.  

### Why Automotive Clips and Fasteners Matter  

Automotive clips and fasteners may seem like minor components, but they are critical for assembling and securing various parts of a vehicle. Whether it’s attaching interior panels, securing wiring harnesses, or holding bumpers in place, these small pieces ensure that vehicles are functional, safe, and aesthetically pleasing.  

Without high-quality clips and fasteners, cars could face issues such as rattling panels, loose wiring, or even compromised safety during collisions. That’s why manufacturers worldwide prioritize sourcing reliable and durable fasteners for their vehicles.  

### China’s Role in Automotive Clip and Fastener Manufacturing  

China has become a powerhouse in the global automotive supply chain, and its expertise in producing clips and fasteners is no exception. Here are some reasons why China stands out:  

1. **Advanced Manufacturing Capabilities**  

   Chinese manufacturers have invested significantly in modern machinery and production techniques. This allows them to produce high-precision clips and fasteners that meet international standards.  

2. **Cost Efficiency**  

   One of the key advantages of sourcing from China is cost efficiency. The country’s streamlined manufacturing processes and competitive labor costs make it possible to produce high-quality components at affordable prices.  

3. **Diverse Product Range**  

   Whether you need plastic clips for interior panels or metal fasteners for structural components, Chinese manufacturers offer an extensive range of products to suit various automotive applications.  

4. **Global Reach**  

   Many Chinese automotive clip and fastener manufacturers export their products worldwide, serving markets in Europe, North America, Asia, and beyond. Their ability to cater to diverse customer needs has solidified their reputation as reliable suppliers.  

### Choosing the Right Manufacturer  

If you’re considering sourcing automotive clips and fasteners from China, it’s important to choose the right manufacturer. Here are some tips to guide your decision:  

- **Look for Certifications**: Ensure the manufacturer complies with international quality standards such as ISO certifications. This guarantees that their products meet safety and performance requirements.  

- **Evaluate Experience**: Opt for manufacturers with a proven track record in the automotive industry. Experienced suppliers are more likely to understand the unique needs of vehicle assembly.  

- **Request Samples**: Before placing a bulk order, request product samples to evaluate quality, durability, and compatibility with your specific requirements.  

- **Check Customer Reviews**: Look for testimonials or reviews from other clients to get insights into the manufacturer’s reliability and service quality.  

### The Future of Automotive Manufacturing in China  

As technology continues to evolve, Chinese manufacturers are embracing innovations such as automation, eco-friendly materials, and smart manufacturing processes. These advancements not only improve product quality but also reduce environmental impact—a growing priority in the automotive industry.  

Furthermore, with electric vehicles (EVs) gaining traction globally, the demand for specialized clips and fasteners tailored for EV components is on the rise. Chinese manufacturers are already stepping up to meet this demand by developing solutions that cater to lightweight designs and unique EV assembly requirements.  

### Final Thoughts  

Automotive clips and fasteners may be small in size, but their importance is undeniable. As China continues to lead the way in manufacturing these essential components, businesses around the world have access to high-quality products that support vehicle safety and performance.  

Whether you’re an automaker or a supplier looking for reliable partners, exploring China’s offerings in this field could be a smart move. With their blend of expertise, innovation, and affordability, Chinese manufacturers are well-equipped to meet the demands of the ever-evolving automotive industry.  

So next time you marvel at a perfectly assembled car, remember—it’s held together by countless clips and fasteners working seamlessly behind the scenes!  

Precision Injection molding for Smart wearable device

Precision Injection Molding for the Smart Wearable Device Industry

In the rapidly evolving smart wearable device industry, precision is paramount. Cnmoulding is at the forefront of this technological revolution, focusing on precision injection molding with the latest overmolding and insert molding technology. Our commitment to excellence ensures that our products meet the highest standards of quality and performance.

With precision tolerances up to 0.02mm, Cnmoulding sets the bar for accuracy in injection molding. Our state-of-the-art facilities and cutting-edge machinery allow us to achieve unparalleled precision in the manufacturing of smart wearable device components. Whether it's intricate overmolding for enhanced durability or precise insert molding for seamless integration of different materials, we have the expertise and capabilities to meet the most demanding requirements.

At Cnmoulding, we understand the unique challenges of the smart wearable device industry. Our team of experienced engineers and technicians works closely with our clients to develop customized solutions that address their specific needs. From design optimization to material selection, we provide comprehensive support throughout the entire manufacturing process.

In addition to precision, we also prioritize efficiency and cost-effectiveness. Our streamlined production processes and rigorous quality control measures ensure we deliver exceptional results while maximizing value for our clients. By leveraging the latest advancements in injection molding technology, we can achieve superior outcomes with minimal waste and lead times.

As the demand for smart wearable devices continues to grow, Cnmoulding remains dedicated to pushing the boundaries of precision injection molding. We are committed to staying ahead of the curve and embracing innovation to meet the evolving needs of the industry. With our unwavering focus on quality, precision, and customer satisfaction, Cnmoulding is the ideal partner for companies seeking excellence in injection molding for smart wearable devices.

How About Precision Injection Mold Manufacturing Process

Precision Injection Mold Manufacturing Process

Precision injection molding is a crucial manufacturing process used to produce intricate and complex parts with high accuracy and repeatability. This process involves the use of advanced machinery and techniques to create molds that are capable of producing high-quality components for a wide range of industries, including automotive, medical, aerospace, and consumer goods.

The precision injection mold manufacturing process begins with the design phase, where engineers use computer-aided design (CAD) software to create detailed 3D models of the parts to be produced. This step is critical in ensuring that the final product meets the exact specifications and requirements of the customer.

Once the design is finalized, the next step is to create the mold. This involves the use of sophisticated machinery, such as CNC machining centers, to precisely carve the mold cavity and core out of hardened steel or aluminum. The precision and accuracy of this step are essential to ensure that the mold will produce parts that meet the required tolerances.

After the mold is created, it undergoes rigorous testing and validation to ensure that it will perform as intended. This may involve running test shots using the actual production material to verify the mold's functionality and the quality of the parts it produces.

Once the mold is approved for production, it is installed in an injection molding machine, where it is used to produce the final parts. During this process, molten material is injected into the mold cavity at high pressure, where it is allowed to cool and solidify before being ejected as a finished part.

Throughout the entire precision injection mold manufacturing process, strict quality control measures are in place to monitor and verify the quality of the molds and parts being produced. This may involve using advanced metrology equipment, such as coordinate measuring machines (CMMs), to ensure that the parts meet all dimensional requirements.

In conclusion, precision injection mold manufacturing is a highly specialized process that requires advanced technology, expertise, and attention to detail. By leveraging this process, manufacturers can produce high-quality parts with tight tolerances and complex geometries, making it an essential capability for many industries.

What is ISO 13485 and How important for a medical injection molding com...

Reference article from http://www.injectionmoldchina.com/the-importance-of-iso-13485/ https://www.chinamoldmaker.org/iso-13485-what-you-need-to-know.html https://www.cnmoulding.com/what-is-iso-13485-for-medical-devices.htm

TRITAN COPOLYESTER Plastic Product Manufacturer in China

Cnmoulding is a leading manufacturer of TRITAN COPOLYESTER plastic products in China. With years of experience and expertise in the industry, Cnmoulding is committed to providing the highest quality products to its customers.

TRITAN COPOLYESTER is a high-performance plastic material that is widely used in various industries, including food and beverage, medical, and consumer goods. It is known for its exceptional clarity, toughness, and chemical resistance, making it an ideal choice for applications that require durability and reliability.

At Cnmoulding, we use the latest technology and equipment to produce TRITAN COPOLYESTER products that meet the highest standards of quality and performance. Our team of skilled professionals works closely with customers to understand their unique needs and develop customized solutions that meet their specific requirements.

Whether you need TRITAN COPOLYESTER products for food, packaging, medical devices, or consumer goods, Cnmoulding has the expertise and resources to deliver the right solution for your business. Contact us today to learn more about our products and services.

The truth about the so-called Chinese injection molding company ranking

I can understand that some companies get the market by making up a list of the top 10 injection molding 

companies in China. Their rankings are unreliable and just created to improve the search rankings

and so on.

Yes, there are lots of ranking lists online, but these rankings are not trustworthy. Some may be biased or 

based on incomplete information, while others may be simply designed to attract nets

Created by the station traffic. However, it is also important to note that not all ranked lists are equal.

For the so-called Chinese injection molding companies ranking, it is hard to say whether the list is reliable 

without knowing more about the sources and methods. The list may be written by a simple website article that is 

written by

Created by someone with limited knowledge of the industry.

This article is a very considerable real introduction to the current situation of China's injection molding and 

mold industry

You can refer to it. https://www.injectionmoldchina.com/injection-molding-companies-do-not-have-rankings/

Electric Car Pipeline Joint-15

Why do you choose a CNMOULDING?

cnmoulding Not just the traditional processing producers. It is persevering consistency, historic accuracy, industry-leading expertise and game-changing digital technology. If you're ready to take your productivity up to the next level, if you're ready to find a professional and reliable supplier for your new car pipe fittings. You're ready for the CNMOULDING.

Electric Car Pipeline Joint-7

After you spent quite a little time looking around the world for many excellent electric car pipe fitting locations, CNMOULDING has announced the best production footprint for the production of the all-electric vehicle pipeline fitting range. If there is one thing that our mold manufacturers all agree on, it is never satisfied with any unqualified automobile pipe joint injection molding thing.

Electric Car Pipeline Joint-6

After you spent quite a little time looking around the world for many excellent EV pipe fitting locations, CNMOULDING has announced the best production footprint for the production of the all-electric vehicle pipe fitting range.

Electric vehicle pipeline joint -2

The electric vehicle pipe joint is the connecting piece between the oil pipe and the oil pipe, the oil pipe, and the hydraulic components. It needs to meet the requirements of firm connection, reliable sealing, small size, large flow capacity, convenient assembly, and good process performance. In the hydraulic system, metal pipes with an outer diameter greater than 50 mm are generally connected by flanges, and oil pipes with small diameters are connected by pipe joints.

Plastic medical products manufacturer in China

CNMOULDING is to be one of the leading manufacturers of quality medical plastic components, containers, disposables and devices for the MEDICAL & PHARMACEUTICAL industry. To fulfill our aim, we constantly implement those very performance and manufacturing principles that have driven our corporate ideals and objectives

What are the different types of molds?

   

 I. Mold classification:

Classification by hardness: soft mold and hard mold (quenching treatment). 

Classification by Grade Quality: Grade 1 Grade 3 by difficulty: Grade A B Class C Class D by mold size: super large medium small

II. Definition of mold hard die and soft mold:

1, mold hardness: soft mold, hard mode 1) Soft mold: mold steel has been pre-hard, no quenching treatment, but the hardness is low, HB below 400, the production life is less than 500,000 times, widely used.

2) hardened mold: the mold steel is annealed, divided into two rough machinings and finishing. After rough processing, the hardness is above HRC48 °. Keep the processing allowance of about 0.2. After rough processing, the tooling will have deformation to prevent the finishing can not meet the requirements. Production life is over 50 ~ 1 million times, with the most applications of small molds.

III. Mold quality grade: Grade I, Grade III, Grade I mold quality

1, mold: must be capable of one million or more opening times. This is the primary mold, the customer requires to make the best mold with the best materials and accessories.

 2. The requirements of Grade I mold are as follows:

(1) Detailed mold design (connecting the computer drawings and materials);

(2) Most mold embryo hardness

To have an HB280;

(3) The core shall be hardened by all HRC50, positions, and accessories;

(4) Medicare side division pipe jacking pin;

(5) line position must have wear-resistant pieces;

(6) temperature control monitor shall be installed in mold, brother, or position;

(7) It is recommended to make all the cooling water channels with nickel plating (ELECTROLESS NICKEL PLATING) intended to prevent rust and easy cleaning;

(8) The positioning lock shall be added to the mold line.

learn more from quora or about all kind of injection mold type here

Traditional, High - speed and Precision Injection molding

 As we all know, injection molding production is pursuing "high quality, efficiency, low consumption", that is, the pursuit of profit maximization. However, the development of things needs a process, rather than overnight, the development of injection molding, and in different stages of development, the focus is different. 

Traditional injection molding

The initial traditional injection molding is a priority to guarantee the normal period, the quality can be appropriately relaxed, not to mention the good rate of production and production efficiency. At that time, the technical master reflected in that others can not adjust qualified samples sample mold, as long as you can call out (no matter you spent one or a day a night or three days or two nights), you are a "cow" person, you are the hero. In view of this, leading to the high adverse rate of product products, many rely on human processing (water cutting inlet, batch cutting, pressing edge, smelting device correction deformation, etc. ), long production cycle, quality cannot be guaranteed, long - term vicious cycle of rework. Although now the traditional injection molding has been greatly improved, the man-machine ratio and labor intensity are still very high. 

High-speed injection molding

High-speed injection molding relative to traditional injection molding, reduce the human-machine ratio, reduce labor intensity, with mechanical automation to replace most actions of people, reflect "quantity"; this process, high requirements for mechanical automation and assembly line operation. Qualified technical masters, not only to see if you can debug the OK model but also to consider the stability and operability of production. If you do not reach the set expectations, your model is "beautiful", it is just a model for viewing, and you cannot become the "guide" of mass production. 

Precision injection molding

Precision injection molding is developed on the basis of high-speed injection molding, is specialized in the production of high value-added products, refers to an injection molding method difficult to meet the requirements of conventional injection molding machine and conventional injection molding process. Reflect "quality" to gain credibility, to "quantity" to gain profit. The precision of precision plastic parts includes size precision, shape precision, and surface precision, corresponding to size tolerance, shape tolerance, and surface roughness respectively, where size precision is an important quality index of manufacturing and use of plastic parts. 

There are many factors affecting the quality and size precision of precision injection molding products, such as material selection, mold design and processing, precision injection molding machine, molding technology, the level of molding personnel and production management, etc. 

Specific requirements are: 

( 1) The size accuracy is high and small tolerance, i. e. high precision size boundary; 

(2) product weight repetition accuracy is high, requiring day, month, year size stability; 

(3) mold is good, rigid material, size accuracy, smoothness of the type cavity and positioning accuracy between templates are high; 

(4) replaces replace conventional syringe; 

(5)The adopts the precision injection molding process; 

( 6) Select materials suitable for precision injection molding. 

reference from https://www.quora.com/Why-is-precision-injection-molding-difficult

Gini coefficient of the Chinese

 The Gini coefficient is fully applicable to China. 

The higher Gini coefficient in the past two years reflects the challenges in the adjustment of China's income distribution. 

The main performance is the widening regional gap. Now the problem is that some people in society is not appropriate, one is to the region, 

Urban and rural differences distort as class differences; the second is to ignore the size differences of economies and exaggerate the severity of the problem. 

I read a paper on CFPS income Gini coefficient decomposition as if written by some researcher at Renmin University involved in the survey. The CFPS Gini coefficient is 0.55, the urban-rural gap contributes 0.24, and the regional gap contributes 0.20. 

That is to say, the main source of income inequality lies in inequality between urban and rural areas and regional inequality, while the class differences between the inhabitants of cities or villages in the same region are small. 

In 2019, Gansu GDP was about $ 5, 000 per capita, $ 18, 000, almost 3.5 times, U. S. 29, 000, the least developed Bavaria, $ 64, 000, more than twice; Japan is almost the gap. 

Since 2000, the regional gap in China has generally been narrowed, that is, the growth rate of economically developed places is lower than that of economically underdeveloped places. However, in the past two years, we have bucked the trend, the growth rate of economically developed areas is moderate, and some economically less developed areas have grown particularly slow, widening the regional gap. 

These two problems are the key to solving the imbalance in income distribution, rather than imagining the "class struggle" and what to "fight the local tyrants and divide the fields". At the 19th National Congress of the CPC, the Central Committee, aiming at the current situation of China's development, directly defined "the contradiction between the people' s yearning for a better life and the unbalanced and inadequate development" as the principal contradiction at present, and put the imbalance before the insufficiency, 

The attitude is clear that —— is to actively manage these two gaps so that more people can enjoy the benefits of development. 

Q: Does the Gini coefficient reflect more social inequality than that in most countries? 

A: China has a huge volume and a huge population. which must be taken into consideration in transnational comparison, but it is undeniable that in China currently,

the degree of social inequality is still high, which is a common problem in emerging countries. Take Japan, for example, which has almost no gap between urban and rural development, the most developed region is about twice the GDP per capita of the least developed region (3.5 times in China), 

Income between different industries is also relatively average, and its social inequality is certainly much better than our country. But the Gini coefficient in Brazil and Mexico is also lower than in China, which may be related to the volume, with only one or 20 million people. I think that our society's

The degree of inequality must be significantly higher than the developed countries like Japan and Germany, but not significantly higher than Brazil and Mexico

Emerging countries will not be higher than the United States that tolerate the rich and the poor and even actively separate social strata. 

Q: you say the class gap is not big, I am in Guangzhou, Beijing, people three apartments, rent a house every month, income than I tried to earn more, I a house, a monthly five-digit mortgage, this is not a class gap? 

A: This is the accumulation of gaps between urban and rural areas and regions in history. People are local people, and the same accumulation reflects a different value. The same house, worth 10 million yuan in Guangzhou, rent 10, 000 yuan; 500, 000 yuan in the county, rent 1200; in the county countryside is the construction cost price, can not be rented. 

CNMOULDING discusses this question, which is from his own yesterday. Despite our hard work, we have been running a company for over 20 years. But as a professional manufacturer of injection molding molds, I would say that we are not able to buy a good house in the inner ring of Shanghai. I am a relative, do an ordinary job, because I dare to buy a house, but live in a bigger house than I do. 

Real estate has widened the gap between the rich and the poor in China. 

3d printing is cheaper alternatives for injection molding?

 What is a cheaper way than 3D printing for injection molding

   Compared with 3D printing, there is no other process with speed perfect, injection molding offered in plastic. 

Look At It From the ABS Plastic Products

One thing you need to consider is being hard to use ABS, if you do some handmade

Because it is non - definite plastic, it means that workers must judge whether the plastic is liquid or still semi - isolated. This may mean some skilled labor, which will make it expensive. 

Hand heat pour plastic in the mold, then vibrates until it bubbles out, and then more plastic is added and again the vibration should work in theory. The challenges you may face include safety, from hydrothermal ABS (nearly 120 °C), preventing liquids from splashing around, and finding the appropriate vibration mechanism to eliminate bubbles. 

One problem with injection molding is air. The air in a set of ABS molds weakens your structure and sometimes significantly. Therefore, manually placing the liquid ABS in the mold will give you a challenge of structural strength that can be easily be vibrated or overcome in vacuum. 

Why would you consider no 3D printing and injection molding

You don t want to use 3d printing - probably due to higher initial costs and poor physical properties. 

You don't want to use injection molding - maybe you don't need the amount, the initial mold production investment is high because you don't know-how

Control the costs. 

You can choose alternative processes such as vacuum molding, sheet molding, hand laying, spray spraying, etc. You can also choose from a prototype molding (aluminum) or resin molding. 

The most common one is the aluminum mold, initial cost, availability and size; performance accuracy. 

But I need to tell you that it is very stupid to do. 

Tips of your choose 

3D printing is not designed for high-volume injection molds but can be used for low-volume operation. Mass product production, first you need to produce high-quality simple or complex molds. The choice of steel material molds instead of solid 3D long fibers can form stronger shells that inject pressurized liquid plastic into it. Aluminum mold is not recommended, inconvenient for modification, and also

The product appearance quality is not as good as the steel mold. 

What is the shot size in injection molding?

 Basic parameters of injection molding machine

The basic parameters of the injection molding machine can better reflect the size of the injection molding products, the work capacity of the injection molding machine, and the evaluation of the type, grade range, and product quality of the processed materials. The basis for the selection and use of injection molding machines.

1. The injection quantity —— the maximum injection quantity that the injection system can achieve when the injection screw or plunger makes a maximum injection stroke under the condition of air injection.

To a certain extent, this parameter reflects the processing capacity of the injection molding machine, marks the maximum quality of the plastic products that can be formed by the injection molding machine, and is an important parameter of the injection molding machine. The PS standard (density ρ=1.05 g/cm3) is expressed by the mass (g) of the injected melt and the volume (cm3) of the injected melt

According to the definition, the theoretical value of the maximum injection capacity of the injection screw at one time is the product of the maximum projection area of the screw head in its vertical and axis direction and the stroke of the injection screw. QL =π/4 D2 S

The injection molding machine can not reach the theoretical value in the working process, because the density of plastic changes with the change of temperature and pressure, therefore, the injection capacity needs to be corrected properly. The modified injection capacity is Q=αQL =π/4 D2 Sα,α—— ejection coefficient, which is generally 0.7∽0.9,

The processing of plastic products on injection molding machines 

the quality of generic products and the total amount of materials used in the gating system shall not exceed 25%∽70% of the injection molding quantity of the injection molding machine,

 2. Injection pressure —— the force acting on the unit area of the melt by the end face of the screw or plunger. The size of the injection pressure is related to the injection molding machine structure, flow resistance, product shape, plastic properties, plasticizing mode, plasticizing temperature, requirements.

A 、 material fluidity is good, product shape is simple, arm thickness is big, the general injection pressure is less than 340∽540 Kgf/cm2. Applicable to the processing of LDPE, PA, and other materials.

The B、 material melt viscosity is low, the product precision is general, the injection pressure is 680∽980 Kgf/cm2. Applicable to the processing of PS, HDPE, and other materials.

The melt viscosity of C 、 material is medium or high, the precision of product is required, the shape is complex, the injection pressure is 980∽1370 Kgf/cm2., and the injection pressure is Applicable to the processing of PP, PC, and other materials.

D、 material has high melt viscosity, thin wall, long process, high precision, complex shape, the injection pressure of 1370∽1670 Kgf/cm2. Suitable for reinforced nylon, polysulfone, polyphenylene ether, and other materials processing.

E 、 processing high-quality precision micro-products, injection pressure can reach 2260∽2450 Kgf/cm2.

In order to meet the processing requirements of injection molding precision products or products with complex shapes of molding structure and engineering structural parts, the processing adaptability of the injection molding machine is enhanced, the molding period is shortened, and the product quality is improved. The injection pressure has a trend of increasing.

 3. injection time (injection speed,)—— the melt began to cool after passing through the nozzle. In order to inject the melt into the mold cavity in time and obtain a dense, uniform, and high precision products, the melt must be filled with the mold cavity in a short time. In addition to sufficient injection pressure, there must be a certain flow rate.

4. plasticizing ability —— the amount of material that can be plasticized in unit time, and the plasticizing ability of general screw is related to screw speed, driving power, screw structure, material performance, and so on. The plasticizing device of the injection molding machine should be able to provide a sufficient amount of plasticized and uniform melt within the specified time, and the plasticizing ability should be coordinated with the whole molding cycle of the injection molding machine. The theoretical plasticizing ability of a general injection molding machine is more than 20% of the actual requirement.

Career crisis at 35

 CNMOULDING talk  about China's 35-year-old workplace crisis

 First,35-year-old employees are expensive, no cost-effective, no young people a high degree of cooperation.

I do business, not charity. Said to listen to the point called the staff, said that the bad point is the commodity, did not see me to use the price ratio? 70% new goods are more expensive than 90% new ones.

High EQ: It's our company's salary doesn't suit you

Second,35-year-old employees are not good "hoodwink ", more opinions

I want obedient college students like sheep, not you who know how to paddle and fish but also dare to talk back to the leaders because of overtime.

Hi EQ: It's our corporate culture that does n' t suit you

Third,35-year-old employees do not work hard, but also busy with housework.

You are all busy with your family. Who will work overtime for the company? You do not work overtime, my child's milk powder money how to come, my Mercedes who refueling me?

High EQ: our team atmosphere is not suitable for you.

The result of homogeneous competition is that the competitive cost of all participants is high, but the marginal income decreases or even returns to zero

There is a famous theater effect in economics like you're watching a show at the moment. If everyone is sitting and watching it is easy and clear, but if someone chooses to stand up, he will get a better view. The price is tiredness.

But the next problem is that other people's experiences get worse, and you have to stand up to deal with it. The final result was that everyone stood and watched the show. Very tired not to say vision is not necessarily better than sitting.

The same is true in the workplace, when all companies scramble to force employees to work overtime, the final result is that employees are tired, but the company may not be able to make better profitability. The eight-hour work system is how many years of labor groups strive for rights, this balance is not easy.

But many vested interests, like Ma Yun, hold this attitude of "overtime struggle is a blessing ". As people with more resources, they always threaten others to accept his rules. This is why we want to build a society ruled by law, even if sometimes under the choice of the rule of law, we do not seem so" progressive ".

But there is still a lot of struggles 13 is willing to do, the boss can be justified to say 996 you do not want some people willing.

Why the dinner roll?

Some people like to burn themselves, by the way, to ignite everyone

And finally, we're gonna hand in hand

Illuminate the capitalists.

But CNMOULDING is not such an enterprise, we pay more attention to the family sense and group nature of the enterprise. Our entire mold production team has been working together for more than 20 years, with rich working experience and team spirit is what we need for such an excellent plastic injection molding company. This is why we have been leading other companies.

What is the real income of Shanghai,China?

 Shanghai has become an international city. Consumption is also becoming more and more expensive. We must be very interested, Shanghai works in various industries, how much do they earn?

Cnmoulding as a production injection molding company. There are 40 employees, basically, each engineer's income is 15000 yuan.(2500usd/month)

Let's look at other companies.

all the price in RMB, you can /6.5, then it is USD income.

The following are several 18,19,20 years of graduates, majoring in computer, automation, communications, electronics. The following are all school pay, before tax.

-----------------------------

Let's start with computers:

Inner ring a state-owned enterprise, computer doctor, about 400000.

Meituan, computer doctor, about 40-500,000.

Master of computer, generally more than 300000.

A university in Shanghai, computer doctor, lecturer, more than 10,000 a month, annual salary estimated 180000.

Another suburban university, computer doctor, lecturer,180000.

--------------------------------------

Other professions:

Shunfeng, UAV Research, Master,300000.

Zhang Jiang small-scale science and technology private enterprises, doctor,300000.

Pudong Automobile Foreign Enterprise, autopilot, Master, an individual can reach 300000.

Pudong automation industry famous foreign enterprises, doctor,250000.

Jiading a medical technology company, master less than 200000, doctor about 250000.

Pudong a patriotic factory, master unified cabbage price of 250000, the doctor seems to be 350000.

Minhang a research institute, doctor, a monthly salary of 17000, an annual salary of about 300000.

A famous automotive electronics company, master 200000, doctor 250000.

Southwest suburb of an automobile private enterprise research institute, doctor about 230000.

A famous video security company, the master, seems to be 200000.

Minhang many aerospace research institutes, doctor 18-27 million, master less than 180000.

Pudong heavy industry manufacturing enterprise, the doctor estimated 180000, master's monthly salary of 10,000.

Shanghai near Kunshan a heavy industry manufacturing industry, doctor,180000.

Caohejing Internet enterprises, master, the monthly salary of 17000, the annual salary of about 200000.

Pudong an aircraft industry, the doctor seems to be less than 200000,(heard that a master of machinery to 6000 a month).

Shanghai auto industry leader, master unified 170000(heard that the impact of the epidemic wages fell 40%).

 Xu Huimou Institute, Ph. D., the monthly salary of 10,000, the estimated annual salary is not more than 160000.

North of an aircraft factory, master, monthly salary less than 10,000.

A ship research institute, Bo Hou, heard that the monthly salary of 8,000.

----------------------------

Supplementary note:

The same number, different enterprises will give differently.

Most of them refer to pre-tax wages, but some companies like to promote corporate costs.

Some state-owned enterprises have dormitories, canteens, supplementary provident fund and other benefits, the hands may be more.

Some private companies may not pay five risks and one gold in full.

Some places may go into lower wages, others increase wages every year.

Some are general packages, and some hide benefits that are not publicly available.

Some companies 996, some companies 955.

Guard against COVID19, in Shanghai is very serious.

 Refuse to wear a mask on the bus? A driver in Shanghai stopped to call the police and the female passenger was brought back to the police station

   Shanghai is still in a period of epidemic prevention and control, bus passengers must wear masks all the time, but yesterday (November 16) there was a special case.

On November 16, a female passenger on a Shanghai bus got on without a mask. After a warning, she put it on and took it off again. Because the female passenger does not listen to the warning advice, the driver dial 110 alarm processing.

November 16 at about 1512, bus 869 driver Yan Zhiping driving vehicles to Nanpu direction. At Gongxin Road Station, Zhongshan North Road, a mother and daughter got on the bus.

The daughter of the mother and daughter did not wear a mask when they got on the bus and was reminded by Yan Zhiping to wear it, but when she walked into the back car, she took off the mask and never put it on. The move caused other passengers to complain and blame, but female passengers still do not want to wear masks.

Seeing the standoff, at 15:22, Yan Zhiping parked his car at Zhongxing Road Station on Republican New Road and called the police. The police quickly alerted the police and brought the female passengers back to the police station for handling.

Shanghai Road Transport Administration has strengthened epidemic prevention measures, requiring bus passengers to wear masks throughout the process. At the bus start station, the driver can delay the departure or stop, if necessary, notify the public security department to deal with it; In the midway, the station should remind passengers to wear masks, and dissuade passengers who do not wear masks, if necessary, can notify the public security department to deal with.

Now the epidemic is getting more and more serious in the world. I really hope you can learn from our country. Against this the terrible epidemic, waiting for the vaccine is passive, active defense is the most direct.

We will not worry about the epidemic now, the people will not live in fear, living and working in peace is the will of the people, I praise our government.

Epidemic control production is also smooth, CNMOULDING electric vehicle mold, smart wearable equipment and other business is getting better and better.