By Genevive B. Mata


There are many ways to skin a cat, so to speak. Injection molding is a production method for merchandise for use or sale by injecting materials such as metals, glass, elastomers, confections and more commonly thermoplastic and thermosetting polymers into a mold. They are used in the creating of many things and are an ideal way if needing to produce a high volume of the same object.

The manufacturer that is termed the town of the plastic molds is based in Haungyan city. Their products are exported all over the world and are reputed to have excellent sales service. Once the customer has placed an order they will then make a sample of the requirements.

Each of these molding machines has many different components and come in different configurations. These can include a horizontal or a vertical configuration. Whatever the design may be each will need to have a power source, injection unit and well as a mold assembly and clamping unit.

Later another material was made and was called Celluliod. These were created from using compounds produced that reacted to nitric and sulfuric acids as well as a strong smelling compound known today as camphor. Dyes and other agents were also added.

The whole cycle is very short normally between two seconds to two minutes and consists of four stages. Before the material is injected into the mold it needs to be very securely closed by a clamping unit. Each mould it attached to the molding machine and the top half is allowed to move.

The material then enters the grooves of the screw and is pushed towards the mold as the screw rotates. The molten is injected quickly through a nozzle at the end of the barrel by pressure that has been building up. This pressure lets the material be packed and held in the mold.

As soon as the molten plastics make contact with the interior of the mold surface it will begin to cool down. While cooling down it will solidify into the shape that is required. In some instances certain parts may shrink while cooling but because of the packing of the material in the injection stage this allows more materials to flow reducing shrinkage to a certain degree.

After a certain amount of time the cooled part can be removed by the ejection system which is attached to the back end of the mold. It is then opened with a certain amount of force. This kind of molding is a quick and effective way of producing objects that are too be used frequently.




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