How to calculate the clamping force of vertical injection molding machine?

The clamping force of vertical injection molding machine is expressed as the maximum value of the clamping mould. The injection material pressure acting on the cavity of the forming space ACTS on the direction of opening the mould, so it must be below the clamping force, which is usually less than 80% of the clamping force. Material pressure is the product of the projection area of forming space formed by the parallel pressure of unit area of forming space. Forming space per unit area of average pressure varies between injection mechanism, plunger ㎏ / ㎝, about 400-500 screw ㎏ / ㎝. About 250-350.

(1) empirical formula: mold locking force of injection molding machine = average pressure per unit area of forming space projection area of forming space coefficient length of finished product width of finished product note:

The unit of length and width of the finished product is cm; The unit of clamping force calculated is kg, divided by 1000 is the tonnage of the injection machine (T); The projected area of the forming space is the projected area of the finished product. For example, for the finished product of the box type, the length and width should be measured after the four sides of the finished product are expanded.

(2) after calculating the required tonnage of the injection molding machine, select the injection molding machine according to the calculation result (the selected injection molding machine tonnage must be greater than the calculation result). However, it should be noted that the distance between the selected injection machine and the maximum and minimum mold thickness, the maximum length and width of the mold must be less than the distance between the selected injection machine and the height of the mold must be between the maximum and minimum mold thickness of the selected injection machine.

Choose different tonnage according to the weight of the product or the amount of injection molding, such as 30T, 40T, 50T, 60T, 80T, 100T, 120T, 160T, 168T, 268T. At present, the largest tonnage in China is 4000T. The larger the tonnage, the larger the screw diameter of the injection molding machine will be…

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