The solution to the bubble phenomenon in the injection molding process depends on the cause of the bubble, and the countermeasures are as follows:
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Commercial lighting is a term used to describe lighting that is used in commercial spaces, including auto dealerships, distribution centers, churches, factories, offices, and warehouses. Unlike residential lighting, commercial lighting is made to withstand more abuse and has a longer lifespan.
While the focus of residential lighting is often on aesthetics, commercial lighting is task orientated. Commercial lighting systems are designed based on what the application is. For example, in an office-type setting, you may see task lighting, which illuminates specific areas where employees need concentrated light to be able to perform their jobs.
1) When the wall thickness of the product is large, the outer surface is cooled faster than the center portion. Therefore, as the cooling progresses, the resin at the center portion is expanded toward the surface while being shrunk, so that the center portion is insufficiently filled. This condition is called a vacuum bubble. The main solutions are:
a) Determine the proper gate and runner size based on wall thickness. Generally, the height of the gate should be 50% to 60% of the wall thickness of the product.
b) A certain amount of supplementary injection material is left until the gate is sealed.
C) The injection time should be slightly longer than the gate sealing time.
d) reduce the injection speed and increase the injection pressure,
e) Use a material with a high melt viscosity rating.
2) The bubbles caused by the generation of volatile gases are mainly solved by:
a) Adequate pre-drying.
b) Lower the temperature of the resin to avoid decomposition gases.
3) Bubbles caused by poor fluidity can be solved by increasing the temperature of the resin and the mold and increasing the injection speed.
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