Shanghai Daoqin Plastics Co., Ltd.

injection molding machine clamping force （也称 clamping force ） is clamping plant/unit in, for sheet/slice （ or more sheet/slice ） mold combined formed products 空腔体 most large force. material 以一定 injection force and speed mold 空腔时, has this clamping force function, make molding mold 不至于 by material injection force function 而胀开.

injection molding machine clamping force and injection molding machine injection amount 一样, is injection molding machine specifications Model/Grade standards （GB/T12783—2000）标注 in, separation value is injection molding machine injection amount （g or cm3）, separation value is clamping force （kN）.

plastics products injection molding processing most small clamping force （即不 by material molding mold clamping force ） is

        F≥10KpA

式 in   F—— clamping force

     K—— safety 系数, generally 取K=1~1.2

     P—— mold cavity inner pressure （MPa）

     A—— products outer in mold separation upper 投影面积（cm2）

molding mold inner pressure value p comparison difficult, it and injection pressure, material viscosity, raw materials process conditions, products 形状, mold structure and cooling type temperature degree has 关. in this 里, mold inner pressure （ this pressure is data, mold inner pressure and products 投影面积 ratio value ） 计算 injection molding machine clamping force

         F≥10Kp平均A

different plastics products injection molding molding mold inner pressure 如图

                            different plastics injection molding 时 mold cavity inner pressure

plastics 名称
 平均 pressure /MPa
  plastics 名称
 平均 pressure /MPa
 
LDPE

MDPE

HDPE

PP

PS
 10~15

20

35

15

15~20
 AS

ABS

has machine 玻璃PMMA

乙 acid fiber resin type plastics CA
 30

30

30

35
 

                             products molding conditions and mold cavity inner pressure

molding conditions
  mold cavity pressure
  products structure
 
easy molding products

普通 products

material material viscosity high

products degree high

material material viscosity relatively high

products degree high
 25

30

35

40
 PE, PP, PS molding thick uniform day use product, container and other

thin container type raw materials is PE, PP, PS

ABS, POM and other degree high industrial use parts

high degree machine parts