Each material has its own melting temperature range. If the temperature is low, the material will not melt well and will decompose if the temperature is high. Therefore, the corresponding appropriate temperature must be selected.
There are also some differences in the temperature control system of injection molding machine
s, so we should learn to watch the glue head to analyze whether the temperature is appropriate and there are different sounds in the glue.
Significant particles exist on materials that are not completely melted.
When the fluidity is not good, it means that the temperature is too low and the temperature needs to be raised.
The glue is very smooth, and the material is very fluid like water, indicating that the temperature is too high and the temperature needs to be lowered.
Material temperature is very important. If it is slightly differentiated, it will seriously affect the strength of product quality. Therefore, changing the material temperature is generally not considered in production.
Second, Mold temperature injection molding machine mold temperature directly affects the product scale.
Generally, in the testing phase, it is set according to the data category and slightly adjusted according to the product quality, regardless of mass production changes.
When the mold temperature is high, the melt fluidity is good, which is conducive to forming, but when the product is shortened and increased, the product size will become smaller.
When the mold temperature is low, the fluidity of the melt is poor, which is not conducive to molding, but the product is shortened and reduced, and the scale is correspondingly larger.
In addition to affecting the size of the product, the mold temperature also determines the thickness of its crystallinity.
The crystallinity is large when the mold temperature is high, and small when the mold temperature is low.
The mold temperature also has certain influence on the product strength. When the mold temperature is low, the product strength is also low. When the mold temperature is low, the fluidity of the product becomes worse, then the combination of the direction of the combination line will be affected, the strength of the binding line decreases significantly. Moreover, when the mold temperature is low, its crystallinity is low and its strength is correspondingly low.
Three, boring temperature, some materials have trace amounts of water molecules, will promote the accelerated decomposition of polymers, such as PC, PBT, etc. , then it must be fully dried before molding before production.
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