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 blow molding.

The different type of molding processes includes:

Extrusion

injection molding and

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.

For more information about our custom molding services, visit Houston

Plastic Injection Molding.