Calculation of clamping force of vertical injection molding machine

Calculation of clamping force of vertical injection molding machine

The locking force of the vertical injection molding machine is expressed by the maximum value of the locking mould. The injection molding data pressure from the forming space (cavity) acts on the direction of the open mold, so it must be below the clamping force. Usually, the material pressure must be below 80% of the clamping force. The material pressure is the product of the projection area of the forming space formed by the parallel pressure per unit area of the forming space. The uniform pressure per unit area of the forming space is different due to the injection mechanism, plunger type about 400-500 ㎏ / ㎝, screw type about 250-350 ㎏ / ㎝.

(1) experience formula: injection molding machine clamping force = the average pressure per unit area of forming space × Projected area of forming space × Coefficient & times; The finished product long & times; The finished width & times; Note:

The length and width unit 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 projection area of the forming space is the projection area of the finished product. For the finished product of the box type, the length and width of the finished product should be measured after the four-front expansion of the finished product.

(2) After calculating the required tonnage of injection molding machine, choose the injection machine according to the calculation result (the tonnage of injection molding machine must be greater than this calculation result). However, we should pay attention to the Coringian interval and the maximum and minimum die thickness of the selected injection machine. The maximum length and width of the mold must be less than the Coringian distance of the selected injection machine, and the height of the mold must be between the maximum and minimum die thickness of the selected injection machine.

According to the product component or injection volume to choose different tonnage, such as 30T, 40T, 50T, 60T, 80T, 100T, 120T, 160T, 168T, 268T, the current international maximum tonnage of 4000T, the larger the tonnage, the screw diameter of injection molding machine is bigger & Hellip; …  How to choose the tonnage of injection molding machine for processing plastic parts.

Generally speaking, customers who have been engaged in the injection molding industry for many years mostly have the ability to identify and choose the right injection molding machine to consume. However, in some cases, the customer can require the assistance of the manufacturer to decide which type of injection molding machine to use, and even the customer may only want a sample or idea of the product, and then ask the manufacturer whether the machine can be produced, or which type of machine is suitable.

In addition, some special products may require special installations such as accumulators, closed loops, injection compressors, etc., to be produced more inefficiently. Thus, how to decide the right injection molding machine to produce, is a very important achievement. The following information is for readers' reference. Vertical injection molding machine