1. Reasons for poor finish of products 1-1 mold finish is not high
1-2 Mold temperature is too low
2. Related knowledge
2-1 Because the surface finish of the product (the total area in contact with the mold) is determined by the finish of the mold surface, if the finish of the mold is not good, the surface finish of the product will be deteriorated due to the small uneven surface, so in the transparent material In the product, the light transmittance also decreases, and the transparency decreases.
2-2 Because the mold temperature is high, the smoothness becomes better, so a large amount of warm water is used in the mold to keep the mold temperature at a certain value, so that the heat of the product is immediately transferred, so that the cycle can be shortened and the residual stress can be reduced. Products.
2-3 In order to obtain a mold with a high degree of smoothness, hard chromium plating is performed on the surface of the mold product, but it is difficult to repair the mold after it is damaged.
3-1 Instant: Increase mold temperature
3-2 Short-term: Improve the surface finish of mold products
3-3 Long-term: Use hard mold materials and use diamond grinding powder for grinding.
4. Due to the difference of materials:
4-1 Since materials with poor fluidity come into contact with the surface of the mold product, they solidify immediately, and the same cannot be said about the surface of the mold product. In addition, the material with insufficient pre-drying and the volatile content in the material evaporate, and after contact with the mold, it condenses and exists between the product and the mold, which causes the product to become poorly finished.
4-2 The materials with good molding finish are: GPPS, ABS, PP.
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Link to this article：The method of eliminating the poor finish of the mold processing technology
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