Web11 Jan 2024 · Splay is one of the more common — and sometimes baffling — defects in plastic injection molded products. It is a cosmetic defect typically appearing as an off-color streak, often silver in hue, along the surface of the molded part. The three main causes of splay are heat, moisture, and shear, with heat being a primary culprit. Web12 Mar 2024 · Difficult to diagnose, shear-related splay defects in injection molded parts may originate in the nozzle tip, barrel, mold, or injection molding profile. Garrett …
What Causes Splay in Injection Molding - knowhowcommunity.org
Web15 Oct 2024 · When the plastic part is formed, the finished surface can lose its original luster and form an opalescent film, or is in a fuzzy state. This is defined as having gloss differences. An example of such error is shown below: The surface gloss differences between plastic parts is mostly due to the surface state of the mold. Webinch on a .120-inch wall-perfect for this part and this material. This material, by the way, was one of those polycarbonate alloys that is blended with polyester. My experience told me that it was shear sensitive and, since I could see blush at the gate and what looked like shear splay on the top of the part (about six bluetooth v50 wireless headphones
Identifying and Correcting Splay Plastics Technology
WebThe plastic parts can develop defects due to the plastics or additives being used. These defects include: Discoloration: If the feed zone and hopper have not been cleansed and … WebColor Streaks: If the plastics and colorants are not mixed thoroughly, it leads to random color streaks on the parts. Splay marks: Silver or white streaks appearing on the surface of the part. Read more about splay defects in our … WebRemedies: Pre-dry the plastic properly before molding. Increase the mold temperature. Smooth out the corners and sharp turns in the mold design to avoid sudden changes in melt flow. Focus more on the ejection mechanism in the mold design to reduce or eliminate the dependence on mold release agents. clemson beat fsu