Working Mechanism of Plastic Injection Molding

The plastic injection molding is a technique that is used to mold the molten plastic into desirable plastic products. The products can be of automobile items, packaging items, medical boxes, and much more. The plastic moulding at forme technologies is not just a job but a piece of art. They have a team of technicians that are qualified and experienced enough to work with high-quality material at affordable prices.


The art to part is an amazing phrase representing the production of the finished product out of your designs. You just need to design your product, give that design or idea to the plastic injection molding workers, and they will form the same product out of it with their expertise. Following are the steps that show the actual working mechanism of the plastic injection molding:


Clamping is the first step of the process, so it is needed to do it with care; otherwise, the damage proceeds and results in failure. Clamping, the injection unit, and the mold are the main parts of the plastic injection molding process. The purpose of the clamping items is to hold the two halves of the whole machine together firmly in place ensuring the production of the exact idea.


In this step, melted and hot plastic material is poured into the molds that are designed exactly like the design of the product. After pouring the plastic material in molds, the air spaces need to be removed; otherwise, the actual design would not achieve. There left the air spaces inside the product thus lowering its quality.

The heating cylinder has a long and short screw according to the size of the product just to spread the melted plastic mixture on the sides and corners of the mold to get the properly designed complete product. The pressure and speed of the entering of plastic material in the heating cylinder are needed to be controlled and maintained during the whole process as it affects the product.


After injecting the melted plastic material, the process needs a break. The pressure is exerted from an external source to fit the melted plastic material in the mold properly and to ensure the removal of the air spaces.


The next step is to cool the hot melted plastic material. The cooling will solidify the melted plastic material in the shape of the mold. The cooling time depends on two main factors: one is the type of material and the second is the thickness of the material. Some plastic materials cool really quickly so the time of cooling provided will be short; in another case, the material can become hard and rough. If the thick material is applied, then it will take more time than thin applied material.

Mold Opening:

To open the mold, open the clamps, the mold will open automatically.


Two units are used in ejecting the finished product out of the mold. The ejecting rod and the plate provide help in the completion of the process. The ejection rod removes the securing pins to pull the product out.

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