Injection Molding
01
Plastic Parts PP/PE/ABS Large-scale Complex Shapes
Product introduction
Injection molding is a manufacturing process widely used in the production of plastic parts, in which heated and melted plastic is injected into a mold to cool and solidify. This process is efficient, precise, and highly automated, and is suitable for mass production of complex-shaped plastic products.
Production technology
1. Material preparation
①Select the appropriate plastic material based on the product's performance requirements and usage environment. Such as PP, PE and so on; ②The plastic particles are dried to remove moisture and prevent bubbles and defective products during the injection molding process.
2. Plasticization
①Adding materials: Add the dried plastic particles into the hopper of the injection molding machine.
②Plasticizing: The plastic particles gradually melt under the rotation and heating of the screw, and are evenly mixed under the shear of the screw.
3. Injection
The screw advances forward, injecting the molten plastic into the mold cavity at high speed through the nozzle, filling every corner of the mold cavity.
The screw advances forward, injecting the molten plastic into the mold cavity at high speed through the nozzle, filling every corner of the mold cavity.
4. Keep pressure
After the injection is completed, continue to apply a certain amount of pressure to compensate for the shrinkage of the plastic during the cooling process and prevent the product from denting or deforming.
After the injection is completed, continue to apply a certain amount of pressure to compensate for the shrinkage of the plastic during the cooling process and prevent the product from denting or deforming.
5. Cooling and solidification
Cooling process: The plastic gradually cools and solidifies in the mold cavity. The mold is equipped with a cooling system (such as a cooling water channel) to remove heat through circulating cooling water.
Cooling process: The plastic gradually cools and solidifies in the mold cavity. The mold is equipped with a cooling system (such as a cooling water channel) to remove heat through circulating cooling water.
6. Mold opening and removal
After cooling is completed, the mold parting surface opens to reveal the formed plastic product. The product is ejected from the mold cavity through an ejection mechanism (such as ejector pin, ejection plate, etc.) to avoid damage to the product.
After cooling is completed, the mold parting surface opens to reveal the formed plastic product. The product is ejected from the mold cavity through an ejection mechanism (such as ejector pin, ejection plate, etc.) to avoid damage to the product.
7. Post-processing
To remove flash and burrs from products, common tools include scissors, blades, grinders, etc. Carry out necessary surface treatment (such as spraying, printing, etc.) to improve the appearance quality and added value of the product.
To remove flash and burrs from products, common tools include scissors, blades, grinders, etc. Carry out necessary surface treatment (such as spraying, printing, etc.) to improve the appearance quality and added value of the product.
Product design
Determine the design requirements for injection molded products, including size, shape, wall thickness, surface quality, functional requirements, etc. Understand factors such as the properties of plastic materials and shrinkage during molding.
Design an optimized cooling system to improve molding cycle and product quality. Determine the location, size and layout of cooling channels to ensure even cooling and rapid circulation.
Control the processing accuracy of the mold to ensure the dimensional accuracy and surface quality of the molded products. If necessary, perform surface treatments such as polishing or plating to enhance the appearance and functionality of the product.