What is Precision Mould Injection Molding?

What is precision mould injection?

Precision mould injection is a device that injects resin material into a metal mould to obtain a product with a certain shape.

In fact, in order to control the temperature of the mould, there are also cooling holes and heaters on the mould that allow refrigerant to pass through. The molten material enters the mould cavity after passing through the main channel and the diversion channel.

After the cooling stage, the mould is opened, and the ejection device on the forming machine will push out the product by ejecting the ejector rod. The moulded product is composed of the main channel that guides the molten resin flowing in, the diversion channel that guides the molten resin into the mould cavity, and the product itself.

We usually design the length of the diversion channel to be equal. The use of recycled materials in the main and diversion channels of moulded products is not a product and can sometimes be discarded or crushed and reused as moulding materials. We call it recycled materials. Recycled materials are generally not used as moulding materials alone, but are usually mixed with new materials for use. This is because after moulding, the mechanical properties, flow properties, color, and other characteristics of the resin will change.

Precision injection moulding refers to the strict dimensional tolerances, positional tolerances, and surface roughness that must be met in the shape of injection moulded products. Many related conditions must be met for precision injection moulding, and the most essential are the four basic factors of plastic materials, injection moulds, injection moulding processes, and injection moulding equipment. In the design of plastic products, high-performance engineering plastics must be selected first, and engineering plastics that can be used for precision injection moulding must be selected from materials with high mechanical performance, stable dimensions, good creep resistance, and resistance to environmental stress cracking. Secondly, an appropriate injection moulding machine should be selected based on the selected plastic material, product size accuracy, weight, quality requirements, and the expected structure of the precision mould.

Applications of precision mould injection

1. Rapid mould manufacturing: Rapid mould manufacturing technology has a short mould production cycle, simple process, easy promotion, low mould production cost, and precision and service life that can meet certain functional needs. It has good comprehensive economic benefits and is a quick, convenient, and practical mould manufacturing technology, especially suitable for new product development and trial production, process verification and functional verification, and small batch production of multiple varieties.

2. Rapid manufacturing technology for precision injection moulds.

3. Precision injection moulding technology.

By reasonably determining the size and tolerance of the precision mould, taking measures to prevent shrinkage errors, injection moulding deformation, demoulding deformation, and overflow, and ensuring mould accuracy, and adopting correct precision injection moulding processes, appropriate engineering plastic materials, and precision injection moulding equipment to achieve optimal matching.

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