3 Different Types Of Plastic Molding Process

When it comes to plastic molding there are two main types such as thermo sets and thermoplastics

, but the core thing that creates a distinction between the two is the temperature. To put it clear thermoplastics are softened at high temperature on the other hand thermo sets are hardened at high temperature.

The reason behind the distinction of the above said method lies in the polymers which forms those two plastics. Thermoplastics have polymer which seem like a chain of atom in single dimensional string, as they are thawed out at high-temperature it can be remodeled. On the other hand, thermo sets are shaped from a polymer with three-dimensional chains therefore they are able to keep maintain their shape. When it comes to shaping and molding plastic by means of either thermoplastics or thermo sets there are loads of processes. The best part about the stuff is that it is possible to use the combination of those two types.

There are a lot of types of molding process such as extrusion, injection molding, and the combination of the two processes which is known as blowing molding.

The different type of molding processes includes:

1. Extrusion

2. Injection molding and

3. the combination of Extrusion and Injection Molding

Now let us see a brief note on the above mentioned processes.

The process of extrusion is started with raw plastics like powder, pellets, and beads. At the outset, the plastic is fed to a gyrating chamber. The extruder that is the chamber will spin and melt the plastic this in turn gets to the next step of shaping the plastic in the way you want. Followed by that, the end product is dropped on the conveyor belt to be cooled with water. Finally the end product is cut and the finishing touch is given to it. Films, sheets, pipes are made through extrusion.

The next type in the plastic molding process is the injection molding process. The theory behind this process is just the same like the extrusion but then the slight difference is the introduction of hopper. The raw plastic is fed into the melting chamber by a hopper. The variation that takes place in this process is; the melted plastic is put into cold mold with high-pressure. The reason behind this is that if the mold is cool, the creation will be cleaned and refined. With the help of this process bottle caps, toys, furniture, containers can be made.

The next method is the combination of extrusion and injection molding processes now let us see what the steps are: A blowing method is used after the extrusion or injection molding. The thawed out plastic in the extrusion process makes use of a die to create a heated plastic tube with the cold mold around it. Whereas in the extrusion blowing, the compressed air will be wafted by the tube such that it will give a force to the plastic to craft a hallow shape inside. When this methodology is followed, the producer will be free and the process of attaching different injection-molded parts is eliminated but in the injection molding method wafts the thawed mold, into the finishing shape in different cold.

by: injection molding

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