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1.基本观点注射成型模具的强度意味着模具破损的界限。然而,在实际使用模具时,重要的是将熔融的成型料向模腔注射时,使由压力而引起的型腔局部变形,不给成型制件造成不良影响。为此,就必须使其变形量小于某一数值。这里有两个条件。其一就是必须使熔融料不钻入由变形引起的构件间隙。熔融料能够钻入由变形引起的缝隙的大小,因成型料的不同而有明显的差异。流动性好的尼龙为0.025mm;苯乙烯、聚乙烯为0.03～0.08mm;聚碳酸酯、硬聚氯乙烯为0.1～0.2mm;因此,设计模具要将变形控制在这些尺寸范围以内。
1. Basic view Injection molding strength of the mold means that the mold damage. However, in actual use of the mold, it is important that when the molten molding material is injected into the mold cavity, the cavity caused by the pressure is locally deformed without adversely affecting the molded article. To this end, it must be less than a certain amount of deformation. There are two conditions here. One is that the melt must not be forced into the gap caused by the deformation. Molten material can be drilled into the gap caused by the deformation of the size, due to the molding material is significantly different. Good flow of nylon is 0.025mm; Styrene, polyethylene is 0.03 ~ 0.08mm; Polycarbonate, polyvinyl chloride is 0.1 ~ 0.2mm; Therefore, the design of the mold to deformation control within these size range.