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Several suggestions for the installation of injection moulds

update:13-04-2019
abstract:

1. Preparation before installation Confirm the cooling […]

1. Preparation before installation

Confirm the cooling water channel. The depth of the screw into the board is 1.5-1.8 times the diameter of the screw. If the screwing is insufficient, it is easy to slip and there is a risk of the mould falling. Confirm that the operators, materials, tools, documents, equipment auxiliary machines, etc. required for production are complete.

2, the method of hanging the mould

When the hanging mould is not horizontal, there will be different steps of the mould cavity before and after the installation of the mould. For the production of sophisticated products, there will be problems such as poor concentricity, poor step, poor tooth shape accuracy and poor distance.

When installing the mould, we must pay attention to this problem. When the mould is put in and can be pushed to the smaller position, the mould clamping is stopped. Loosen and tighten the lifting ring. The previous mode is the reference (because the front die has a positioning ring). When viewing the rear part, when the level of the front mould is very good, the position of the mould cavity is the same. Continue to clamp the mould to completion, but do not start the high pressure. it is good. (The first time the upper mould is closed, the high pressure must not be used first, and it is confirmed that the mould can be normal before starting the high pressure).

3, the method of screwing

The mould with low temperature, that is, the mould temperature below 50 degrees can be clamped to the high pressure start. The front and rear moulds are tightened diagonally. The 8 screws can be screwed out. When the mould temperature is above 50 degrees, the screws should not be tightened too tightly before the mould temperature is reached. After the mould temperature has arrived, start the high pressure and tighten the screws diagonally.

The mould material will swell and increase in volume with increasing temperature. When the mould temperature is high, it is more obvious. If the screw is tightened before the temperature rises, it has a certain influence on the life of the mould and the accuracy of the mould.

4, the use of attached materials

When the mould thickness is not enough, it is necessary to add a template. When the mould temperature is high, it is recommended to install a heat shield between the plate and the mould. Whether it is a template or a heat shield, the flatness must be as small as possible.

If the flatness is large, the front and rear moulds of the mould are not parallel, and there is a difference after the high pressure is closed, thereby affecting the product quality. When the mould temperature reaches the set value, the actual mould temperature is checked and a mould thickness adjustment is performed.