Moulds from Hamofa Injection Moulding,the pre-eminent key to perfection.There can be no perfect injection moulding process without a perfect mould. At Hamofa Injection Moulding, we design and construct high-quality moulds for every type of injection moulding project.

What aremoulds?

An injection mould is a piece of tooling made specially for a specific part or product. The mould - also known as a pattern or injection mould – ensures that the moulded product has exactly the same shape every time.

A mould consists of two parts – an injection side and an ejector side – which together form a block of metal with a cavity inside. The injection side is also known as the pre-mould and is the fixed side that sits in the machine against the injection unit. The ejection side is the movable side that travels to the other side during injection moulding until the mould is closed and then travels away from it to unload the moulded product.

The mould cavity is in the shape of the product to be made, which we fill with liquid plastic. This gives the material in the cavity the shape of the final product coming out of the mould. A mould is therefore the negative shape or counter shape of the desired product. There are several types of moulds. The shape and material from which a mould is made depends on the product to be manufactured. In addition, pressure and temperature are also important for mould design and configuration. The same mould can be fitted in different machines.

Mould making:specialist work.

STEP #01Design

Designing and building moulds is a job for specialists. Mould construction is a mechanical design technology. Particular attention is to be paid to the shape when designing a mould. This must be determined very precisely because the mould must manufacture the product to match the predetermined shape and dimensions exactly.

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STEP #02Choice of material

The choice of material for the mould is to be made according to the desired material properties. For example, a mould for plastic injection moulding must be able to withstand high pressure and not distort. In addition, you must be able to remove the mould without the product emerging damaged from the mould. Some moulds are used once for a unique product – also known as the ‘lost mould’ method. For large production runs we use other more durable moulds. An injection mould is often made of tool steel, but it can also be made of aluminium or another metal.

STEP #03Mould construction

The next step is to construct the mould. This is usually done by machining. The parts of the mould are made into the desired shape by machine turning and milling, after which a toolmaker assembles them into one complete mould. This can be done with threaded fasteners or with welded joints. Mould welding is a precise job for an experienced welder because the parts of the die must not move. Our sister company Hamofa Metal Machining manufactures the moulds in its state-of-the-art CNC workshop. It features innovative machinery and cutting-edge technology.

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