The Table Mould cannot be directly placed outside the pouring site after pouring is completed, so as to avoid photochemical reaction of outdoor sunlight on the lower table mould.

The so-called photochemical reaction is mainly due to ultraviolet rays, which can directly cause the molecular chain to break. In all light, the shorter the wavelength, the greater the energy, the more accelerated the aging degree. Because rubber and plastic materials will generate free radicals in the process of absorbing light energy, thus triggering and accelerating some unfavorable chain reactions, the most common is the oxidation of the table mould.

The table mould is easy to change the temperature of the table mould itself due to frequent illumination after being placed outside. It can be seen that the internal temperature of the mould rises after the mould should absorb heat, thus degrading the mould. For the table mould that uses PP polypropylene plastic as the main production raw material during pouring, the ultraviolet ray is weak. After being placed outside for 1-2 days, the toughness of the mould itself will shrink and other phenomena. It is easy to age, become brittle, and the plastic mould will be more easily deformed due to unbalanced placement.

However, for the plastic mould which is poured and moulded by using ABS material as the main injection moulding raw material, it can bear relatively high temperature in terms of temperature, and it can be produced in high temperature and relatively cold production environment. For the table mould which is directly exposed to outdoor ultraviolet light, discoloration, aging and other phenomena will occur.

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