Choosing the right die-casting mould is essential to produce an effective and durable part. The structure of the mould also affects the quality of the product. The design of the mould can improve efficiency and speed of production. It can also prevent common defects such as cold laps.

The size, shape, and thickness of the mold are important factors for the quality of the casting. The cross-section should be uniform, as changes can affect the porosity and dimensional accuracy. The ribs on the interior of the mould increase matter strength and reduce weight. The draft is the taper applied on the vertical walls of the mould. The draft can vary depending on the shape of the wall, the angle of the wall, and the type of molten alloy used.

A parting line separates the fixed half of the mold from the moving half. This line is usually straight. It also determines the direction of the mold opening. It is important to use a parting line that is not too wide or too thin. This can cause cracks in the mold. It should also be placed in a hidden area.

A parting line is also used to ensure that the casting will be removed from the mold easily. The parting line will also determine the direction of the features for easy injection. The mold can be divided into multiple cavities to produce more than one die-cast part at a time.

In order to ensure a smooth metal flow, the mold needs to be designed carefully. This will improve the quality of the final casting and the life of the mold. This can be done by ensuring that there are no sharp edges. In addition, the corners of the mold should be rounded, to promote a natural flow. It can also be used to smooth angled surfaces.

The core is the second half of the mold. This section is used to shape the interior of the casting. The core is a preformed bonded sand insert. It is also used for mounting points. It helps reduce weight and enhances filling abilities.

The sprue is the medium used to inject the molten metal into the mold. It provides the necessary pressure to overcome the flow resistance. It also acts as a guide for molten metal. The sprue should be tapered downwards. This will enhance moderate ejection force during ejection.

The mold needs to have vent plugs installed in the deep cavities. This is to prevent unwanted casting in the surrounding areas. It is also to ensure even porosity in the final casting. The mold must also have cooling ports. These ports prevent tool wear and ensure high strength in the final casting.