Gloss problem of injection molded parts
After molding, the surface of the plastic part loses the original luster of the material, or a milky white film is formed on the surface, which is called poor surface gloss.
Analysis of the reasons for the dull surface of the product and the reasons for the improvement methods
Mold temperature is too low or material temperature is too low
Increase mold temperature or material temperature (improve replication)
The density of the melt is insufficient or the back pressure is low
Increase the holding pressure/time or increase the back pressure appropriately
There is too much release agent in the mold
Control the amount of release agent and wipe it clean
There is water or oil on the mold surface
Wipe clean water or oil and check for leaks
The inner surface of the mold is not smooth (glue stains or rust)
Mold polishing or removing glue stains
Insufficient drying of raw materials (the whole is dumb)
Remove mold dirt/glue stains in the mold cavity
Mold dirt/glue stains in the mold cavity
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The melt is overheated to decompose or stays in the barrel for too long
Reduce the melt temperature or reduce the residual quantity
Runner and gate are too small (cold material)
Increase the size of runners and gates
The injection speed is too slow or the mold temperature is uneven
Increase the injection speed or improve the cooling system
Material Jane is not cleaned
Thoroughly clean the barrel
Related issues with metal inserts
After molding, the surface of the plastic part loses the original luster of the material, or a milky white film is formed on the surface, which is called poor surface gloss.
Analysis of the reasons for the dull surface of the product and the reasons for the improvement methods
Mold temperature is too low or material temperature is too low
Increase mold temperature or material temperature (improve replication)
The density of the melt is insufficient or the back pressure is low
Increase the holding pressure/time or increase the back pressure appropriately
There is too much release agent in the mold
Control the amount of release agent and wipe it clean
There is water or oil on the mold surface
Wipe clean water or oil and check for leaks
The inner surface of the mold is not smooth (glue stains or rust)
Mold polishing or removing glue stains
Insufficient drying of raw materials (the whole is dumb)
Fully dry the ingredients
Mold dirt/glue stains in the mold cavity
Remove mold dirt/glue stains in the mold cavity
The melt is overheated to decompose or stays in the barrel for too long
Reduce the melt temperature or reduce the residual quantity
Runner and gate are too small (cold material)
Increase the size of runners and gates
The injection speed is too slow or the mold temperature is uneven
Increase the injection speed or improve the cooling system
Material Jane is not cleaned
Thoroughly clean the barrel
