注塑模具随着产品的外观要求千变万化，尺寸和精 密度的掌握至关重要，在设计尺寸时需要多方面考虑。

　　With the ever-changing appearance requirements of injection mold products, it is very important to master the size and precision.

　　首先，模具加工设从塑件外形美观的角度考虑，塑件由于受融料流动的因素，流动性差的塑件融料和壁比较薄的塑件，设计的尺寸尽量简化，否则容易导致融料填充不足，影响产品外形美观，一定需要大的尺寸时，可以选择换塑件原料或稍作调整壁的厚度。

　　First of all, the mold processing design is considered from the perspective of the appearance of the plastic parts. Because of the melt flow, the plastic parts with poor fluidity melt and thin wall, the design size should be simplified as far as possible, otherwise it is easy to lead to insufficient melt filling and affect the appearance of the product. When a large size is needed, you can choose to change the raw materials of the plastic parts or slightly adjust the wall thickness

　　济南模椇厂

　　济南模具厂

　　Jinan mould factory

　　其次，产品的尺寸精 确度。塑件融料在生产过程中会产生一定的收缩率和稍微扩张，主要是塑胶融料在成形的过程中会导致尺寸收缩，造成尺寸的不精 确。收缩过程主要有成形收缩和后收缩，受到成形收缩的影响比较大，造成收缩的因素有多种，在模具加工的工艺上，需考虑塑件的原料使用性能，避免造成尺寸不精 确。

　　Secondly, the dimensional accuracy of the product. Plastic melt in the production process will produce a certain shrinkage and slight expansion, mainly plastic melt in the forming process will lead to size shrinkage, resulting in inaccurate size. The shrinkage process mainly includes forming shrinkage and post shrinkage, which are greatly affected by forming shrinkage. There are many factors causing shrinkage. In the process of mold processing, the material performance of plastic parts should be considered to avoid inaccurate size.

　　模具的尺寸和精度需要从塑件在成型过程中遇到的情况设计合理，降低生产成本，提高产品质量.

　　The size and precision of the mould should be designed reasonably according to the situation in the forming process, so as to reduce the production cost and improve the product quality