The plastic injection molding process involves the use of plastic or polymer.
The granular polymer is fed into a heated barrel.
It is also further melted and mixed in the barrel through the rotation process of the screw-type piston, because when the screw rotates, the friction between the polymer particles generates heat.
Then, by the screw rotation action, the melted plastic is forced into the mold cavity with the desired final shape through the nozzle.
The mold is relatively cold and there may be a cooling passage through.
This causes the molten polymer to solidify almost immediately after the mold cavity is filled.
When the mold is opened again, the cured part with the final desired shape will pop up.
It will be further cooled by the surrounding air.
Material: there are multiple types of polymers used by Polymers in injection molding, depending on what performance is required.
There are basically two categories: thermoplastic and thermoplastic. The most commonly used polymers in plastic injection molding are listed below: 1. PC 2. PC-ABS 3. ABS 4. POM 5.
HIPSMachine plastic injection molding machine is used to fix the mold in the appropriate position, melt the plastic and inject it into the mold cavity.
Injection molding machines are classified by tonnage.
Tonnage is the clamping force used by the machine to clamp the mold during injection molding.
Depending on the size of the part and the material used, it can range from 10 tons to 5000 tons.
Another variety of injection molding machines is whether it is a single injection molding machine or a double injection molding machine.
For double injection molding machine, it will have 2 sets of screw piston, Hopper and nozzle.
Plastic injection defects in plastic injection molding, there are many common defects due to process constraints and material properties.
Common defects are: sink marks, short molds, wrap edges, Silver lines, flow marks, Flash, welds, etc. .
Now with better injection molding machines, materials, skills and better Part designs, this defect is easily overcome.
Plastic products are widely used in electronics, automobiles, machinery, equipment, communication products and other fields.
About 80% of these products are made from injection molding processes.
Plastic products can be produced in large quantities, and the cost is relatively low, which is two of its main advantages compared to other processes.
Most 2D or 3D products can be molded using injection molding machines with the help of sliders, internal lifts, etc, without any difficulties.
The products produced by injection molding have high precision, high complexity, good surface finish, good consistency, high output and relatively low cost, which cannot be achieved using other types of production technology.