Plastic button cage injection mold design
Plastic button cage injection mold design The plastic button cage product structure is shown in Figure 1, wherein Figure 1a is a square button cage and Figure 1b is an oval button cage. Its material is PP, which is one of the most commonly used general-purpose plastics. It has good mechanical properties, electrical insulation properties, heat resistance and chemical stability, and is inexpensive. It is commonly used to make structural parts of household appliances and other daily necessities....
Analysis of Injection Molding Process for Two-color Plastic Products
Injection molding two-color or mixed-color plastic products are prepared by mixing the same raw materials into two different colors, and plasticizing two kinds of color melts by two injection molding machines of the same structure and the same specifications, and then injecting them through a nozzle. Inside the mold. The molded plastic products are color-separated, mixed or irregular, and the appearance effect is not obtained by ordinary injection molding and surface modification. The...
Handling of defective sinkers in injection molded products
Gate dizziness, also known as sun spots, fog spots, that is, the circular color change produced near the gate. The shape is an ellipse or a circle, usually determined by the method of pouring and the size of the gate, due to melt fracture. Defect mechanism There are many reasons for creating a sprue, the main reasons are: The barrel, nozzle and mold temperature are low; The injection pressure is too high and the mold temperature is too low. If the mold temperature is too low, the plastic will...
Solutions when the injection molded product is incomplete
problem: Injection molding products are incomplete, how to overcome in the process? answer: Slow injection speed The injection speed has great significance for some products with complex shapes, large thickness and long process, long process, and plastics with high viscosity such as toughness ABS. When high pressure is not enough to fill the product, high-speed injection should be considered to overcome the problem of dissatisfaction. Improper feed adjustment, lack of material or more material...
Features of the PC injection molding process
PC plastic is commonly known as polycarbonate, which is commonly known as bulletproof rubber due to its excellent mechanical properties. PC plastic has the characteristics of high mechanical strength, wide temperature range, good electrical insulation performance (but the arc resistance is unchanged), dimensional stability and transparency. It is widely used in electrical products, electric instrument housings, and electronic product structural parts. There are many modified products of PC,...
Germany invents two-component injection molding technology
The German company Kraff Maffei announced in the forecast of the K2004 (Düsseldorf Industrial Rubber Industry Expo 2004) that the company will exhibit the KM 160 with PU (polyurethane) mixing and metering devices at the exhibition. 750CX injection molding machine. It is reported that the KM 160-750 CX injection molding machine was the first equipment to successfully combine injection molding and reaction technology for thermoplastic and PU two-component injection molding. This process called...
Brief description of injection molding processing technology
Brief description of injection molding processing technology Plastics is a new type of material that is artificially synthesized by people using chemical methods. The use of various plastics processed products has become an indispensable production and living material for various sectors of the national economy and people's lives. Injection molding is the most commonly used method in plastic molding processing. Injection molding can realize production automation, high-speed, and has extremely...
The trend of today's injection molding machine industry
China is still the world's largest market for machinery and equipment, accounting for 29% of the global market in 2012 and will continue to lead the global market. India will be the fastest growing country in the world, accounting for 12% of the global market share in 2013. It is expected that by 2017, due to the development of the global transportation industry, machinery manufacturers in Asia and the Pacific will be able to obtain the advantage of fast delivery. Injection molding machines...
MuCell microporous injection moulding process
Trexel Corporation in the United States based on MIT microcellular foaming concept, the microcellular foaming technology has been industrialized, and has been applied in injection molding, extrusion molding and blow molding. MuCellTM's breakthrough in injection molding technology provides injection molding production with unprecedented capabilities not found in other injection molding processes, opening up new markets for new product design, process optimization, and reduced product costs....
Injection molding process analysis about UPVC plastic raw material
PVC, also known as hard PVC, is an amorphous thermoplastic resin made by polymerizing vinyl chloride monomers plus certain additives (such as stabilizers, lubricants, fillers, etc.). In addition to additives, blends with other resins have been modified to give them significant practical value. These resins include CPVC, PE, ABS, EVA, MBS, and the like. UPVC has high melt viscosity and poor fluidity. Even if the injection pressure and melt temperature are increased, the fluidity does not change...
Advantages of Nozzle Pressure Measurement during injection molding
Advantages of Nozzle Pressure Measurement The above has demonstrated the importance of pressure regulation during injection and holding pressure. Therefore, the accuracy and repeatability of pressure detection are critical factors. In closed-loop systems, pressure detection is very important. Only by ensuring accurate pressure detection can the regulator be able to bring the actual pressure close to or equal to the setpoint. In an open-loop system, the accuracy and repeatability of pressure...
All-Electronic Press Force Measurement during injection molding
All-Electronic Press Force Measurement Since the all-electric injection molding machine does not have a vector fluid that causes motion, hydraulic pressure detection cannot be performed. Therefore, load sensors are usually used to measure the elastic deformation using an extensometer to directly measure the force. All-electric injection molding machine manufacturers have developed a variety of elastic components and assembly plants corresponding to the extensometer. Another difference is that...
Screw speed during injection molding
Hydraulic equipment and discharge volume and pressure adjustment The centrifugal pump produces an average hydraulic pressure of up to 140 bar, which is particularly suitable for injection molding. In all other phases of the cycle, the requirements are significantly lower, except in the specific case where fast plasticizing is required (eg PET injection-blow one-shot injection molding machines). In order to reduce energy consumption, variable displacement pumps and pressure accumulators can be...
Injection speed control during injection moulding
Injection speed control includes open-loop control, closed-loop control and closed-loop control options. Open-loop systems rely on shared proportional valves. Proportional tension is applied to the desired proportion of fluid so that the fluid creates pressure in the injection barrel, allowing the injection screw to move at a certain forward speed. The closed-loop system uses a closed-loop proportional valve. The loop is closed at the position where the closing port is located, and the closing...
Screws and solenoid valves for injection moulding
On full voltage machines, all movements are performed by brushless synchronous motors equipped with permanent magnets. Rotary motion is converted into linear motion through ball bearing screws that have been used in the machine tool industry. The effect of the entire process depends in part on the plasticization process, where the screw plays a crucial role. Mitsubishi's newly introduced solutions in the production of all-electric models include a feed screw screw threading roller and a screw...
Pressure adjustment during injection molding
Whether it is a hydraulic or electric injection machine, all the movements in the injection molding process will generate pressure. Appropriate control of the required pressure can produce a finished product of reasonable quality. Pressure regulation and measurement system On hydraulic injection presses, all movements are performed by the oil circuit responsible for: 1. The screw rotation in the plasticization phase (can determine and even control the back pressure). 2, slide channel (nozzle...
PET preform injection molding system with vertical clamping device
Hot filling poses extreme requirements in terms of errors for PET preforms. Due to crystallization, particularly high precision is required during the production of hot-filled preforms, especially at the bottlenecks. Even very small temperature differences in the heating section of the mold can cause differences in the flow of the melt in the hot runner. Because of the different effects of shrinkage at the bottleneck position, elliptical deformation or bending may occur during the...
vertical clamping device
PET preform injection molding system with vertical clamping device Hot filling of beverages places particularly high demands on the quality of PET preforms. The vertical technology used by KraussMaffei's preform injection molding system for the first time enables the production of hot-filled preforms with mold cavities of more than 48 dies. Hot filling poses extreme requirements in terms of errors for PET preforms. Due to crystallization, particularly high precision is required during the...
Program Control of Injection Speed
The program control of the injection speed is to divide the injection stroke of the screw into 3 to 4 stages, and use the appropriate injection speeds in each stage. For example, the injection speed is slowed when the molten plastic first passes through the gate, high speed injection is used during filling, and the speed is slowed at the end of filling. With this method, flashes can be prevented, flow marks can be eliminated, and residual stress of products can be reduced. The flow velocity is...
Control of injection molding process conditions Currently
Control of injection molding process conditions Currently, various injection molding machine manufacturers have developed a variety of program control methods, roughly including: injection speed control, injection pressure control, injection of plastic injection into the mold cavity, screw back Pressure and rotational speed, etc., control of the plastication state. The purpose of achieving process control is to improve product quality and maximize the effectiveness of the machine.
Senlan Launches Special Inverter for New Injection Molding Machine
In the increasingly competitive injection molding industry, how to reduce production costs has become the primary issue for enterprise development. In the actual production cost, the energy consumption of injection molding machine accounts for a large proportion, and the frequency converter with remarkable energy-saving effect has become the synonym of energy-saving device for injection molding machine. As a leading brand in the inverter industry, Senlan has been paying close attention to the...
Co-injection single screw single barrel complete set of equipment
On January 6, Nordson XALOY released the company's patented single-screw, single-cylinder equipment package, which provides cost savings and versatility for two-component molding while requiring less investment than using individual injection molding. A complex co-injection molding system of cells. Nordson XALOY's system, called Twinshot, replaces standard screws and barrels with homegrown components, allowing twin components to be produced in a single-screw process with single-screw,...
Introduction of automatic transfer system of vertical liquid injection packaging machine
Electrical automation and drive systems are used in a wide range of applications in various fields. In liquid filling and packaging equipment for food and daily necessities, the requirements for position control are very high. The following is an example of liquid filling and packaging equipment produced by a packaging machinery factory in Tianjin. And the application of transmission equipment in the packaging machine equipment. Real-time monitoring of the status of each monitoring point of the...
Maintenance and care of injection molding machine-Control of injection molding process conditions
Control of injection molding process conditions.Currently, various injection molding machine manufacturers have developed a variety of program control methods, roughly including: injection speed control, injection pressure control, injection of plastic injection into the mold cavity, screw back Pressure and rotational speed, etc., control of the plastication state. The purpose of achieving process control is to improve product quality and maximize the effectiveness of the machine.
