The effects of injection molding machinery and equipment for temperature

Injection molding machinery and equipment is very strict to the requirement of temperature, if the temperature is high or low, will affect the finished product batch of qualified rate. (1) cylinder temperature of each material has its own melting temperature range, low temperature melting the material is bad, the high temperature will break down, so you must select the corresponding appropriate temperature. But we also exist certain differences in the temperature control system of injection molding machine, so learn to watch the glue head analysis temperature is appropriate, glue have different sounds, material of typing, there are obvious not completely dissolved materials of granular particles, liquidity is not too good, shows that the temperature is too low, the need to raise the temperature. Glue is very smooth, typed material liquidity is very good, like water temperature is too high, need to lower the temperature. Temperature of the material is very important, if slightly higher decomposition, will seriously affect the strength of the product quality. So, the production is generally not considered in temperature change. (2) the mold temperature mold temperature directly affects the product size, usually in the test phase material category set, slightly adjusted according to the product quality, quantity during change is preferred. High mold temperature, melt body has good liquidity, is conducive to forming, but product shrinkage increases, the size will be smaller accordingly. Mold temperature is low, the melt body less liquid, is not conducive to forming, but product shrinkage decreases, and larger size accordingly. Mold temperature in addition to affect the product size, also determines the size of its crystallinity, die temperature high crystallinity is big, die temperature low crystallinity was low. Die temperature strength of its products has a certain influence, die temperature low product strength is low, when the mold temperature is low, the product liquidity, then combined with the thread position fusion will be affected, combined with line strength obviously decreased, moreover, die temperature low when its crystallinity, its strength is relatively low. Part (3) the drying temperature materials have traces of water molecules, it would lead to accelerate the decomposition of polymer, such as PC, PBT, etc. , so it must be fully dry before molding before production. When drying does not reach the designated position, not only will accelerate decomposition of materials, and produce a lot of bubbles, liquid will become very good easy generation as well as the phi front. So must be dry before molding.