Do not only pay attention to the price of injection molding machine, reasonable adjustment of clamping force is the key
In addition to paying attention to the price of the injection molding machine, there is a point of concern, that is, the clamping force of the injection molding machine. Clamping force is a very important process of the machine. If everything about an injection molding machine is good, but the clamping force is bad, then everything else is foam and meaningless. So how is such an important injection molding machine clamping force calculated?
The clamping force of injection molding machine is expressed by the larger value of the locking die. The pressure of the injection material shot out of the cavity acts on the direction of the opening mold, so it must be below the clamping force. Usually, the pressure of the material must be less than 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.
- Empirical formula: clamping force of injection molding machine = average pressure of unit area of forming space plus coefficient of projection area of forming space plus length of finished product plus width of finished product. Note: The unit of length and width of the finished product is cm; The unit of the calculated clamping force is kg, divided by 1000 to give the tonnage of the injection machine (T). The projection area of the forming space is the projection area of the finished product, such as the box of the finished product, to expand the four sides of the finished product, and then to measure its length and width.
- After calculating the required tonnage of the injection molding machine, then select the injection machine according to the calculation results. However, attention should be paid to the golin distance of the selected injection machine and the size of the mold thickness. The large length and width of the mold must be less than the golin distance of the selected injection machine, and the height of the mold must be between the size and thickness of the selected injection machine.
According to the weight of the product or injection molding volume to choose different tonnage, such as 30T, 40T, 50T, 60T, 80T, 100T, 120T, 160T, 168T, 268T, at present domestic large tonnage of 4000T, the greater the tonnage is, the higher the price of injection molding machine will be.
Generally speaking, the customers who have been in the injection molding industry for many years have the ability to judge and choose the appropriate injection molding machine for production. However, in some cases, the customer may need the assistance of the manufacturer to decide which type of injection molding machine to use. The customer may even have only a sample or idea of the product and then ask the manufacturer whether the machine can be produced or which type is suitable.
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