Effect of clamping force on vertical injection molding machine

Date:2017-05-12 Author: Click:

Vertical injection molding machine can be locked: by the product and plastic to determine the "clamping force" tonnage.

When the material is injected at high pressure into the cavity of the mold, a holding force is generated. Therefore, the clamping unit of the injection molding machine must provide enough "clamping force" to prevent the mold from being pulled open.

The clamping force demand is calculated as follows:

The projection area of the finished product in the direction of switching mold is calculated from the external size of the finished product.

Die support force = the projection area of finished product in the direction of the switching die (cm2)× the number of holes × the pressure in the die (kg/cm2);

In-mold pressure varies with raw materials, generally 350 ~ 400kg/cm2 of raw materials;

The clamping force of the machine should be greater than the clamping force, and for the sake of insurance, the clamping force of the machine should be more than 1.17 times of the clamping force.

At this point, the specification of the clamping unit has been initially determined and the tonnage of the machine has been roughly determined. The following steps must then be taken to confirm which of the injection unit has the desired screw diameter.