The clamping force of the injection molding machine is expressed by the maximum value of the locking mold. The fabric injected out of the cavity is ironed within the direction of the gap of the mildew, so the material sometimes has to be below eightieth of the clamping force. The fabric pressure is the product of the parallel pressure per unit space of the forming house to make the projected space of the forming house. The common pressure per unit space of the molding house varies by counting on the injection mechanism and is concerning 400-500 kg/cm for the plunger kind and 250-350 kg/cm for the screw kind.
Clamping force of injection molding machine = product projected space X space constant
（1）The unit of length and dimension of the finished product is cm; the unit of the calculated clamping force is metric weight unit, and divided by one thousand is the tonnage duty (T) of the injection machine;
（2）The projected space of the forming house is the projected space of the finished product. For a finished product like a box, when evolution the four sides of the finished product, live its length and dimension.
When scheming the desired tonnage duty of the injection molding machine, choose the injection machine consistent with the calculation result (the tonnage duty of the chosen injection machine should be larger than the calculation result). However, concentrate on the Colling distance and therefore the most and minimum mildew thickness of the chosen injection machine. The utmost length and dimension of the mildew should be smaller than the Colling distance of the chosen injection machine. The peak of the mildew should be among the utmost and minimum mildew thickness of the chosen injection machine. Consistent with the load of the merchandise or the injection volume, we'd like to decide on completely different tonnages, like 30T, 40T, 50T, 60T, 80T, 100T, 120T, 160T, 168T, and 268T. The larger the tonnage duty, the larger the screw diameter of the injection molding machine.
Before selecting an Associate in Nursing injection molding machine, we'd like to gather the subsequent data.
1. Mold size, weight, special style, etc.;
2. Kind and amount of plastic used (single material or multiple plastics);
3. Look dimensions (length, width, height, thickness) and weight of injection wrought products;
4. Molding necessities, like quality conditions, production speed, etc.
After the information above, you'll be able to select the suitable special injection molding machine consistent with the subsequent steps：
The model and series square measure determined by the merchandise and plastic.
Confirm whether or not the "large column inner distance", "mold thickness", "mold minimum size" and "mold plate size" of the machine square measure applicable consistent with the dimensions of the mildew, to substantiate whether or not the mildew will be place down.
It's determined by the mildew and therefore the finished product whether or not the "opening stroke" and "supporting stroke" square measure enough for the finished product to be taken out.
The tonnage duty of "clamping force" is set by the merchandise and plastic.
Confirm the desired "shot volume" by the load of the finished product and therefore the range of mildew cavities, and choose the suitable "screw diameter".
The conditions like "screw compression ratio" and "injection pressure" square measure determined by the plastic.
Confirmation of "shooting speed". Some finished merchandise needs a high injection rate and fast injection to be stably fashioned, like ultra-thin merchandise. During this case, it's going to be necessary to substantiate whether or not the injection rate Associate in nursing injection rate of the machine is enough and whether or not it has to be equipped with an accumulator, closed-loop management, and alternative devices.
After the information above, the injection molding machine that meets the requirements will be determined.
However, if we encounter a special situation, we need to consider the size-matching problem. What is size matching? In some cases, the customer's mold or product has a small volume but needs a large injection amount, or the mold has a large volume but needs a small injection amount, cause the standard specifications set by the silicone products manufacturer may not meet the customer's requirements, so "size matching" must be carried out, that is "large wall small injection" or "small wall large injection".
If you have got a product you're wanting injection wrought please contact the team at Nicerapid for a free quote！