During injection molding, plastic parts may sometimes show unwanted color changes — such as yellowing, browning, or dark streaks. This defect is often referred to as discoloration. Understanding the ...
What Is Molding Shrinkage?Molding shrinkage is the ratio of dimensional change caused by cooling after injection molding to the original cavity size. In simple terms, it tells you how much a plastic p...
Dimensional accuracy is a critical quality for plastic parts, but it is influenced by many complex factors. Understanding these factors is essential for setting realistic tolerances and producing cons...
What Causes Deformation in Plastic Parts?Deformation in molded plastic parts — including warpage, cracking, bending, and twisting — is primarily caused by residual internal stresses. These stresses ...
Poor surface gloss refers to a dull, matte, or unevenly shiny appearance on all or part of a plastic product, as illustrated in Figure. For transparent plastic parts, poor gloss often reduces light tr...
Why Anneal?The purpose of annealing is to eliminate localized stress concentrations that occur in plastic parts during cooling and solidification. These stresses arise when different sections of a par...
During injection molding, black spots defect are a common quality defect that directly affects product appearance and yield rate. These defects mainly include three types: black spots, localized burn ...
In the world of plastic injection molding, few quality issues are as frustrating and damaging as product cracking. This defect not only ruins the appearance of a part but, more critically, compromises...
Injection molding is a precise and efficient manufacturing process, but it’s not without its challenges. One frequent issue is the short shot—when the molded part isn’t completely filled, resulting...
In injection molding, sticking and poor part ejection are common but frustrating issues. While multiple factors can contribute, mold-related problems are often the primary cause. Understanding these c...
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