1. Preparation before installation
Confirm the cooling water circuit and the depth of the screws screwed into the machine plate is 1.5-1.8 times the diameter of the screws. If they are not screwed in enough, the threads may slip and there is a risk of the mould falling off. Confirm whether the operators, materials, tools, documents, equipment and auxiliary machines required for production are complete.
2. Method of hanging mould
When the hanging mold is not level, the front and rear mold cavities of the installed mold will have different levels of step difference. For the production of precision products, there will be poor concentricity, step difference, tooth shape accuracy, distance, and other phenomena.
When installing the mould, we must pay attention to this problem. When the hanging mold is closed to a small position that can be pushed by hand, stop closing the mold. Loosen and tighten the ring, use the front mould as the reference (because the front mold is fixed with a positioning ring), observe the rear mould part, and when it is level with the front mold, the mold cavity position coincides, continue to close the mold until it is completed, but it is better not to start high pressure. (When closing the upper mold for the first time, do not start high pressure first, and wait until it is confirmed that the mold closing can be normal before starting high pressure).
3. Screwing method
For moulds with low temperature, that is, mold temperature below 50 degrees, the mold can be closed until high pressure starts, and the screws of the front and rear moulds are tightened diagonally. 8 screws can be tightened. When the mould temperature is above 50 degrees, the screws should not be tightened too much before the mould temperature reaches the mould temperature. After the mould temperature reaches the mould temperature, high pressure is started and the screws are tightened diagonally.
The mold material will swell with the increase of temperature and the volume will increase. It is more obvious when the mould temperature is high. If the screws are tightened before the temperature rises, it will have a certain impact on mold life and mould precision.
4. Use of accessories
When the mold thickness is not enough, it is necessary to install a template. When the mold temperature is high, an insulation board is installed between the machine plate and the mold. Whether it is a template or an insulation board, its flatness must be as small as possible.
If its flatness is large, the front and rear moulds of the mold are not parallel, and there will be differences after high-pressure closure, which will affect the product quality. When the mold temperature reaches the set value, check the actual temperature of the mold and adjust the mold thickness once.
Hongke Mould has specialised in plastic mould and injection moulding for over 15 years, and mainly engaged in
Medical Plastic Mould,
Aero Injection Mould, Auto Plastic Mould, etc. Feel free to reach out for a free quotation.
