1. Rubber injection molding: Rubber injection molding is a production method in which the rubber material is directly injected into the model from the barrel for vulcanization. The advantages of rubber injection molding are: although it is an intermittent operation, the molding cycle is short, the production efficiency is high, the blank preparation process is cancelled, the labor intensity is small, and the product quality is excellent.
2. Plastic injection molding: Plastic injection molding is a method of plastic products. The molten plastic is injected into the mold of plastic products by pressure, and the desired plastic parts are obtained by cooling and molding. There are mechanical injection molding machines dedicated to performing injection molding. The most commonly used plastic today is polystyrene.
3. Molding and injection molding: The resulting shape is often the final product, and no other processing is required before installation or use as a final product. Many details, such as bosses, ribs, and threads, can be formed in a single injection molding operation.
Injection molding is also a machine-made shoe. After the upper surface is tied on the aluminum last, it is usually directly injected into PVC, TPR and other materials by the turntable machine to form the sole at one time. Today, there are also PU (chemical name polyurethane) injection molding (machine and mold with General injection molding is different).
Advantages: Because it is made by machine, the output is large, so the price is low.
Disadvantages: If there are many styles, it is more troublesome to change the mold, the shoes are difficult to shape, and there are no cold-adhesive shoes with exquisite workmanship, so it is generally suitable for orders with a single sole style.
The purpose, operation and result of temperature, pressure, speed and cooling control
●How the adjustment of injection molding machine settings affects the process and quality
●Optimize screw control settings
●Multi-stage filling and multi-stage pressure-holding control; the influence of crystallization, amorphous and molecular/fiber orientation on process and quality
●Influence of internal stress, cooling rate and plastic shrinkage on the quality of plastic parts
Rheology of plastics: how plastics flow, orient and change viscosity, shear and molecular/fiber orientation
●The relationship between pouring system, cooling system, mold structure and injection molding process
Shrinkage cavity, shrinkage, unsaturated mold, burr, weld line, silver wire, spray mark, scorch, warpage deformation, cracking/fracture, dimension out of tolerance and other common injection molding problem description, cause analysis, and in mold design, molding Solutions for process control, product design and plastic materials.
●Cause analysis and countermeasures of lack of glue and unsaturated mold around injection molding parts
●Cause analysis and solutions
●Cause analysis and countermeasures of surface shrinkage and shrinkage cavity (vacuum bubble) of injection molded parts
●Cause analysis and solutions of silver streaks (material flower, water splash), scorch, and gas streaks
●Cause analysis and countermeasures of water ripples and flow marks (flow marks) on the surface of injection molded parts
●Cause analysis and countermeasures of water marks (weld lines) and spray marks (serpentine marks) on the surface of injection molded parts
●Cause analysis and countermeasures of surface cracks (cracking) and top white (top explosion) of injection molded parts
●Cause analysis and countermeasures of color difference, poor gloss, color mixing, black stripes and black spots on the surface of injection molded parts
●Cause analysis and countermeasures of warping deformation and internal stress cracking of injection molded parts
●Cause analysis and countermeasures of dimensional deviation of injection molded parts
●Cause analysis and countermeasures of injection molding parts sticking to mold, dragging (strain) and dragging white
●Cause analysis and countermeasures of insufficient transparency and insufficient strength (brittle fracture) of injection molded parts
●Cause analysis and countermeasures of cold spot and peeling (layering) on the surface of injection molded parts
●Cause analysis and countermeasures for poor metal inserts of injection molded parts
●Cause analysis and improvement measures of nozzle drooling (runny nose), glue leakage, nozzle wire drawing, nozzle blockage, and difficulty in mold opening
●Using CAE mold flow analysis technology to quickly and effectively solve on-site problems in injection molding
Post time: Aug-29-2022