The Basics Of High Pressure Molding Dec09


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The Basics Of High Pressure Molding

The production of complex parts and components using molds or die casting has always been a complex process. Relatively simple shapes are easy to produce using this method, and there is limited requirement for the addition of pressure. However, when the mold is complex with different sections, wall thicknesses, and design elements, the addition of pressure is necessary.

The Basics

High pressure molding uses both heat and pressure. Molten metal, which is liquid in nature, is forced into the die under high pressure. The mold is then held under pressure until the molten material cools and solidifies. At this point, the die is opened and the part or component released.
Depending on the specific shape and design of the part and the type of metal, there may be one or two different injection systems used to add both molten metal and pressure.

The Benefits

The use of high pressure molding fills the various shapes of the mold at a fast rate, eliminating any voids that occur if the molten metal begins to cool and does not flow into all parts of the mold.

Secondly, the addition of pressure after filling removes all bubbles before the metal begins to cool and traps these bubbles internally where they could go unnoticed. These bubbles could cause structural and performance problems with the part or component if they were not removed at the same time the injection of the molten material occurs.

The process of high pressure molding is fast, cost-effective, and offers a consistent part or component. Typically, these components require minor fettling to remove the small rise at the joint of the mold.

High pressure molding is one of our specializations at Ghatge Patil Industries Ltd. To discuss this process for your parts and components, see us at

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