What is the plastic injection molding process?

What is the plastic injection molding process?

The injection molding process of plastic products is a process of using plastic raw materials to form specific shapes and sizes of products through molds. The following are the detailed steps of the process:

(1) Select the right plastic raw materials: Select the right plastic raw materials according to the performance and requirements of the required products.

(2) Preheating and drying plastic raw materials: In order to avoid porosity during molding, plastic raw materials need to be preheated and dried.

(3) Design and manufacture mold: according to the shape and size of the required production products, design and manufacture the corresponding mold. Die need

(4) Prepare a cavity corresponding to the product in order to fill the plastic raw materials in the molten state.

(5) Clean the mold: Use detergent and cotton cloth to clean the surface of the mold to ensure that there is no residue in the mold.

(6) Debugging mold: according to product requirements, adjust the closing height of the mold, clamping force, cavity arrangement and other parameters to ensure that the mold can correctly form the product.

(7) Add plastic raw materials to the filling cylinder: Add the preheated and dried plastic raw materials to the filling cylinder.

(8) Injection: under the set pressure and speed, the melted plastic raw materials are injected into the mold cavity through the injection cylinder.

(9) Pressure preservation: After the injection is completed, maintain a certain pressure and time to make the plastic raw materials fully filled in the cavity and prevent the product from shrinking.

(10) Cooling: cooling molds and plastic products to make the products more stable and prevent deformation.

(11) Demoulding: Remove the cooled and solidified product from the mold.

(12) Inspection of products: quality inspection of products to see if there are defects, size meets the requirements.

(13) Repair the surface defects of products: use tools, grinding and other methods to repair the surface defects of products to improve the beauty of products.

(14) Packaging: the products are packaged as required to prevent scratches and pollution and ensure safety during transportation.

The whole injection molding process requires strict control of temperature, pressure, time and other parameters to ensure the quality and production efficiency of the product. At the same time, enterprises also need to strengthen production management to ensure equipment maintenance and clean working environment, so as to improve the stability and reliability of the entire injection molding process. With the continuous progress of science and technology, new processing technologies have also emerged, further improving the quality and production efficiency of plastic products.