2023年6月25日星期日
Why to find best automotive pipe fastener manufacturer in China
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Electric Car Pipeline Joint-6
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Plastic medical products manufacturer in China
2021年5月11日星期二
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.
2021年5月10日星期一
CNMOULDING succeed invest smart watch
Smartwatch is a watch with information processing ability and meets the basic technical requirements of the watch. Its functions are similar to that of a personal digital assistant. In addition to indicating time, it should also have one or more functions, such as a compass, pedometer, touch screen, global positioning system, and as a large storage device, which includes a pointer, number, image, and so on. World-famous technology companies such as Apple, Samsung, Sony and so on have been involved in the development and research of the product, representing the products of Apple iwatch、 Google watches, Sony SmartWatch、 Epson smartwatch PS-500 and so on.
Recently, CNMOULDING successfully developed a project for customers. By modifying the structure of the product, we reduced the whole development cost by 50% in injection mold development and 20-30% in plastic production.
The success of this smartwatch will be the best preparation for our later development of similar smart electronic wearable devices and reduce development costs.
More about WEARABLE DEVICE
A wearable device is a portable device that is directly worn on the body or integrated into the user’s clothes or accessories. Wearable devices are not only a kind of hardware devices. But also realize powerful functions through software support, data interaction, and cloud interaction. Wearable devices will bring great changes to our lives and perceptions.
Wearable devices mostly exist in the form of portable accessories that have some computing functions and can be connected to mobile phones and various terminals. The mainstream product forms include wrist-supported watches (including watches and wristbands), and feet-supported shoes (including shoes, socks, or other products worn on the legs in the future), glasses with head support (including glasses, helmets, headbands, etc.), and various non-mainstream non-mainstream such as smart clothing, school bags, crutches, and accessories Product form.
SMART BRACELET
The smart bracelet is a wearable smart device. Through this bracelet, users can record real-time data such as exercise, sleep, some food, etc. In daily life, and synchronize these data with mobile phones, tablets. And iPod touch, playing a role in guiding healthy life through data.
The main body of the smart bracelet is generally made of medical rubber, memory rubber, environmentally friendly plastic, natural and non-toxic. The appearance design is high-end and fashionable, generous. Not only has the function of sports health secretary but also has the function of fashion accessories. The appearance has streamlined wreaths and various colors. There are silver coated metal caps on both ends, which are very suitable for wearing. Which also makes it different from traditional bracelets with buckles or buttons. The smart bracelet has a built-in lithium battery with a battery life of up to 10 days, a vibration motor, and a motion-sensing accelerometer. The small silver cap at the end of the bracelet is a button for changing settings. And the other section is a 3.5 mm plug for connecting to a mobile phone.
The design style of a smart bracelet is quite tempting for users who are used to wearing jewelry. More importantly, the design style of the bracelet is versatile. Moreover, regardless of the size of the small bracelet, its function is quite powerful. For example, it can be said to be a high-end pedometer, with the general step counter of a normal pedometer, measuring distance, calories, fat, and other functions. It also has special functions such as sleep monitoring, high-end waterproof, Bluetooth 4.0 data transmission, and fatigue reminders.
APPLICATION FIELD
The advent of the era of wearable smart devices means the extension of human intelligence. Through these devices, people can better perceive external and own information. Can process information more efficiently with the assistance of computers, networks, and even other people, and can achieve more seamless communication. Application areas can be divided into two categories, namely self-quantification and in vitro evolution.
In the field of self-quantification, the two most common application segments are the field of sports and fitness outdoor. And the other is the field of medical care.
In the field of sports and fitness outdoor, the main participating manufacturers are professional sports outdoor manufacturers and some start-up companies. They use lightweight watches, bracelets, and accessories as the main form to achieve sports or outdoor data. Such as heart rate, cadence, air pressure, diving depth, Monitoring, analysis. And service of indicators such as altitude.
In the field of healthcare, the main participating manufacturers are medical portable device manufacturers. Which provides specialized solutions for the detection and treatment of blood pressure, heart rate. And other medical signs in various forms, including medical vests, belts, and implantable chips.