Thermal injection moulding is one of the more common forming methods used in mould injection production. The whole process of injection moulding and its finished products are likely to have various problems. There is one kind of problem that has less impact on the product characteristics, but very much affects the appearance, that is, the colour difference. So what are the general aspects that can affect the colour difference?

1. The colour masterbatch is the key element of colour difference. The colour quality of the plastic product immediately lies in the masterbatch basic colour. The advantages and disadvantages of heat resistance, dispersibility and masking ability of masterbatch can not be the index value of detecting the quality of masterbatch, and there is immediate contact with the colour difference. Choosing higher quality masterbatch is not only conducive to reducing the colour difference, but also can improve the comprehensive appearance of injection moulded products.

2. The temperature, working pressure and melt time during the mould injection production process will also lead to the colour difference problem, in addition to different batch size mixing, different machines and equipment, beer and other processing technology elements will also affect.

3. Reduce the barrel temperature on the colour difference is the impact of the production of manufacturing often encountered should a heating ring destroyed invalid or part of the heating manipulation can not control the long burn resulting in a strong shift in the barrel temperature and thus cause the colour difference.

4. Reduce the impact of injection molding process adjustment, non-colour difference causes need to adjust the main parameters of the injection molding process, try not to change the injection temperature, condensation, injection cycle time and masterbatch additive amount, adjusting the other need to observe and check the main parameters of the process to change the impact on the colour, such as the discovery of the chromatic aberration should be adjusted immediately.

5. If the raw material elements have been cleared before manufacturing, the colour difference is found in the mould injection manufacturing, it is only necessary to distinguish the colour masterbatch and plastic masterbatch mixing problems, and adjust it according to the change of injection temperature or condensation type after establishment. In the understanding of the condition of the trend analysis of the colour tone will be more easy to ensure.

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Post time:Sep-25-2020