Vertical injection molding machine can be locked: the "clamping force" tonnage is determined by the product and plastic.
When the raw material is injected into the cavity under high pressure, a mold supporting force is generated, so the clamping unit of the injection molding machine must provide sufficient "clamping force" so that the mold cannot be opened.
The calculation of clamping force requirements is as follows:
Calculate the projected area of the finished product in the direction of the switch mold from the appearance of the finished product;
Supporting mold force = projected area of the finished product in the direction of the switching mold (cm2) × number of mold cavities × pressure in the mold (kg / cm2);
The pressure in the mold varies with the raw materials, and the general raw materials take 350 ～ 400kg / cm2;
The clamping force of the machine needs to be greater than the supporting force, and for the sake of insurance, the clamping force of the machine must generally be greater than 1.17 times the supporting force;
So far, the specifications of the clamping unit have been initially determined, and the tonnage of the model has been roughly determined, and then the following steps must be performed to confirm which screw diameter of the injection unit is more suitable.