WebTips for Avoiding Knit Lines in Injection Molding Keeping the proper temperature in the injection molding machine, runners, and within the mold are all key to ensuring... Setting … WebApr 1, 2008 · Weld or knit lines are perhaps the most common and difficult injection molding defect to eliminate. They occur when melt flow fronts collide in a mold cavity. A …

What Are Knit Lines In Injection Molding? - Rex Plastics

WebMay 1, 2004 · When injection molding complex parts, often knit-lines are formed during the mold filling stage. These knit-lines are well-known as particularly critical regions in the mold when mechanically ... WebA knit line is any line, visible or not, where two resin flows meet (see Figure 2). Depending on the design of the mold and the material being injected, a knit line may present no problem at all, may be a cosmetic issue, or can cause a potentially serious structural problem. the king sisters ages

Injection Molding Defects and How to Avoid Them

Webopposed to two or more gates. Molding parts with multiple gates will almost certainly produce a weld line at right-angles to the line joining the two gates which could cause the weld lines to be exceptionally weak (see Figure 1.0 and Table 1). Figure 1 Flow Lines Knit or Weld Lines Cavity Gates Table 1 Knit line in a multi-injection-point cavity. WebWeld or Knit lines are a plane or section in an injection molding part where the flow of molten plastics meets from different directions. Injection molded plastic parts have comparatively less strength in the weld line section and they also have an impact on product aesthetics. Weld Lines in Plastic Part WebDec 17, 2024 · Knit lines naturally occur in all molded operations that have obstructions inside the mold. The knit lines will slightly reduce the strength of the part locally where they occur, but that slight change in strength may not cause a problem with durability. the king sisters top songs