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动模的支承板由两个垫块支持的结构型式应用最广泛。压射时因成型压力作用而产生弯曲变形,不但使压铸件的厚度尺寸发生变化,分型面产生飞边,甚至引起型腔镶块呈倒锥度而使铸件难以脱模。此种现象,越来越引起设计者和制造者的高度重视。 有人误以为增加支承板的硬度或更换其材料,可以减小支承板的弯曲。 压铸模支承板常用材料一般采用45号或A_5。其弹性模量E都在(2.0～2.1)×10~6公斤/厘米~2范围内,根据载荷作用下挠度公式f_c=-(Pl~30/(48EJ)可知,钢种不同,但厚度相同的钢板,在同样载荷下,会产生同样的弯曲。不同硬度的同种钢板,在同样载荷下,产生的挠曲和弯曲量是一致的。据有关资料介绍,增加模
Movable support plate by the two pad structure supported the most widely used. During injection, bending deformation occurs due to the forming pressure, which not only causes the thickness dimension of the die-casting to change, but also causes flash on the parting surface, and even causes the cavity insert block to be inverted taper to make it difficult for the casting to be demolded. This phenomenon has drawn more and more attention from designers and manufacturers. Someone mistakenly thought that increasing the hardness of the support plate or changing its material may reduce the bending of the support plate. Die casting support plate commonly used materials commonly used 45 or A_5. The elastic modulus E is in the range of (2.0 ~ 2.1) × 10 ~ 6kg / cm ~ 2. According to the deflection formula f_c = - (Pl ~ 30 / (48EJ) under load, Of steel, under the same load, will produce the same bending .Different hardness of the same type of steel, under the same load, the deflection and bending is the same amount.According to the relevant information, increase the mold