Shanghai Daoqin Plastics Co., Ltd.

        导致 mold deformation factors has very more,当我们 in for mold hot add hot 时, add hot speed degree and add hot temperature degree effect/influence to mold is deformation, its mold deformation causes is what,我们 in add hot mold can how to measures 进行预 anti mold deformation.

         add hot speed degree and temperature degree effect/influence mold deformation, its mold deformation causes and anti measures analysis:

        1, add hot speed degree effect/influence

         mold hot rear deformation generally is is cooling formed, this is positive 确. mold especially is complex mold, processing process positive and for mold deformation generate relatively large effect/influence, for mold add hot process comparison can obvious 看出, add hot speed degree relatively fast,往往 generate relatively large deformation.

        (1) deformation causes:任何 metal add hot need 膨胀, due to in add hot 时,同一 mold inner,各部 separation temperature degree 不均(即 add hot non-uniform)就必然会造 formed mold inner separation 膨胀 不一致 property, from formed add hot internal stress. in versus below/following temperature degree, non-uniform add hot main/primary generate hot force, ultra- versus temperature degree add hot non-uniform, also generate 组织转变 不 and other property,既 generate 组织应 force. therefore add hot speed degree fast, mold surface and temperature degree 差别越 large,应 force large, mold hot rear generate deformation large.

        (2)预 anti measures: for complex mold in versus below/following add hot 时应缓 slow add hot, generally 说, mold true hot deformation need ratio salt add hot small more.? using/adopting preheating, for/regarding low alloy mold can using/adopting one-time preheating (550-620℃); for/regarding high alloy rigid mold using/adopting preheating (550-620℃ and 800-850℃).

        2, add hot temperature degree effect/influence

        一 厂家 is ensure mold to relatively high hardness,认 is improve/increase add hot temperature degree. is production table/sheet 明, this type of method is 不恰当, for/regarding complex mold,同样 is using/adopting positive add hot temperature degree lower add hot 淬火, in upper temperature degree add hot rear hot deformation need ratio in lower temperature degree add hot hot deformation large more.

        (1) deformation causes:众 周知,淬火 add hot temperature degree high,钢 晶粒越趋 long large, due to relatively large can make property increase,则 make cooling generate force large. again 之, due to complex mold large more in high alloy manufacturing, if temperature degree high,则因Ms点 low,组织 in 残留奥氏体 amount increase more, add large mold hot rear deformation.

        (2)预 anti measures: in ensure mold technology conditions lower combined selection add hot temperature degree,尽 amount selection lower 限淬火 add hot temperature degree,以 decrease/reduce cooling 时 应 force, from decrease/reduce complex hot deformation.