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Why do bubbles appear in plastic injection molding products?
by：Vowin Rapid Prototyping
2023-02-19
There are two reasons for the processing of air bubbles in plastic injection molding:
1) Bubbles are generated due to the presence of moisture
Reason: The degree of drying of the plastic is not enough, resulting in the hydrolysis of the plastic.
Solution: Fully pre-dry and pay attention to the insulation management of the hopper.
2) vacuum bubble
Causes of vacuum foam: The thick-walled material flow freezes quickly to prevent shrinkage and insufficient charging, resulting in partial vacuum foam in injection molding products. Or the temperature setting of the injection mold is not suitable. The cylinder temperature is not suitable, and the injection pressure and pressure protection are insufficient.
Solution: Avoid uneven wall thickness and structural design of plastic products. Correct the gate position so that the fluid is injected vertically into the thick wall. Increase the temperature of the plastic injection mold. Reduce barrel temperature. Increased injection pressure and pressure protection.
Nowadays, it is very common for us to utilise in CNC Machining Aluminum Parts. And the quality of is decisive to production efficiency.
Shenzhen Vowin Model Design CO.,LTD aims to hire several additional experienced marketing professionals that can add to our existing talent-pool and help continue the steady growth of our business.
We have abundant experience in providing enhancement services and we are expert in OUR SERVICE.
Shenzhen Vowin Model Design CO.,LTD has a number of producing line for producing OUR SERVICE.
rapid prototyping supplier OUR SERVICE is characterized by various advantages, such as CNC Turning Milling Service, 5 Axis CNC machining service and stainless steel CNC turning Parts, which is not the case with other OUR SERVICE.
1) Bubbles are generated due to the presence of moisture
Reason: The degree of drying of the plastic is not enough, resulting in the hydrolysis of the plastic.
Solution: Fully pre-dry and pay attention to the insulation management of the hopper.
2) vacuum bubble
Causes of vacuum foam: The thick-walled material flow freezes quickly to prevent shrinkage and insufficient charging, resulting in partial vacuum foam in injection molding products. Or the temperature setting of the injection mold is not suitable. The cylinder temperature is not suitable, and the injection pressure and pressure protection are insufficient.
Solution: Avoid uneven wall thickness and structural design of plastic products. Correct the gate position so that the fluid is injected vertically into the thick wall. Increase the temperature of the plastic injection mold. Reduce barrel temperature. Increased injection pressure and pressure protection.
Nowadays, it is very common for us to utilise in CNC Machining Aluminum Parts. And the quality of is decisive to production efficiency.
Shenzhen Vowin Model Design CO.,LTD aims to hire several additional experienced marketing professionals that can add to our existing talent-pool and help continue the steady growth of our business.
We have abundant experience in providing enhancement services and we are expert in OUR SERVICE.
Shenzhen Vowin Model Design CO.,LTD has a number of producing line for producing OUR SERVICE.
rapid prototyping supplier OUR SERVICE is characterized by various advantages, such as CNC Turning Milling Service, 5 Axis CNC machining service and stainless steel CNC turning Parts, which is not the case with other OUR SERVICE.
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