Because the overall shrinkage of injection molded parts is constant, the more the overall shrinkage, the smaller the centralized shrinkage, and the lower the degree of internal shrinkage and surface shrinkage.
Extended data:
Precautions:
1. Whether the operators are familiar with the product quality standards before operation.
2. The injection molding factory indicated that the processing method should be correct. For example, the nozzle position must be cut flat or batch flat, and other edges cannot be cut or cut.
3. Pay attention to shrinkage, color mixing, top height, lack of glue, material flower, etc. When testing the appearance, it is necessary to make clear the limit acceptance.
4. Products with strict appearance requirements, such as mirrors, light buttons and smooth surfaces. Externally assembled and not sprayed with oil, there shall be no fingerprints and oil stains. The workbench should be kept clean, and the products should not be scratched and worn.
5. In the production process, conduct a comprehensive inspection of the products every 30 minutes, carefully check the samples and quality inspection package instructions, and ensure that the qualified rate of the produced products reaches 100%.
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