What’s known in the plastic injection molding business as “gate blush” or simply “blush” is a cloudy or hazy discoloration of the plastic on a finished part. It is most often found near gate locations, where material enters the part. Not only is the defect in color and gloss visually unappealing, the plastic in that area can be weaker than in the rest of the part. Needless to say, it’s an issue that needs to be corrected as soon as it is discovered.
The process of plastic injection molding can produce the perfect parts for your needs quickly and cost effectively. However, as with any manufacturing process, there are certain “gotchas” that can cause less than optimal results. Below are five design guidelines you should follow to help ensure that your production runs deliver an outstanding finished product.
When you watch a plastic injection molding production run and see mass quantities of perfect plastic parts being produced, it’s easy to believe that the process is almost effortless. The truth is, however, there are many, many factors that go into producing that perfect part, and if any of these factors are off by even a fraction, defective parts can result.