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How to make a good crate mould Apr 16, 2018

crate mould technical points:

1. How to make a crate die long service life?

The first step is to select the right pair of moulds for the mould base and mould core cavity. For example: To produce a one-to-four crate mould, a pre-hardened steel material with a hardness higher than 33 must be used as the mould base, and then the appropriate mould standard parts should be selected. The

Second, we must control the hardness of each piece of steel, not too hard. The

Then, the friction and guiding parts of the crate mould must be finished and no manual work can be used.

Finally, some mould companies will use moulds for injection moulding, so we must consider the following two points: A. How to ensure that small impurities in plastic do not damage the core and cavity; B. How to prevent impurities from entering the cavity . The

2. How to make the crate mould effective injection?

Good plastic material filling systems require special hot runner systems to aid in forming, because producing durable containers requires HDPE materials with a low melt index, such as a melt index of 4 or 6, and so on.

Ensure that the cooling system achieves the best results. To produce a durable crate mould, the design of the cooling water path on the largest moulding surface of the mould must be optimized. For the production of disposable crate moulds, the quenched and tempered steel must be combined with an excellent cooling water circuit design.

Select high-speed injection moulding machine to run the mould, the injection screw speed (RPM) must be greater than 350. Most of the world's crate manufacturers use accumulators to increase the melt injection rate.

The design of the plastic crate mould is also very important. The ejection mode of the crate mould is preferably designed to be automatically ejected by the mechanical system so that the ejection action can be completed when the mould is opened. Of course, if the injection moulding machine can be equipped with two hydraulic drive machines to automatically eject the machine, the eject action during mould opening can be smoother.

For different types of moulds, high speed operation is required. The mould must be high-precision, and the fitting must have accurate guiding function, otherwise the mould cannot have high-speed operation performance.

3. Exhaust system at the plastic handle mould handle:

The exhaust at the handle of the crate is a very important issue, because when the crate is loaded, the handles at both ends are the key points of the load. If the exhaust at the two handles on the mould is not good, a noticeable weld seam will be left and the product will be easily damaged from this point.