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How to Fix Lusterless Surfaces in Injection Molding: A Comprehensive Troubleshooting Guide
Introduction: What is a Lusterless Surface? In injection molding, surface finish is often the first indicator of part quality. A lusterless surface defect manifests as a hazy, matte, or uneven finish lacking brilliance. For transparent components, this defect also results in reduced…
Alex Yu
Aug 12 2026
Injection Molding
How to Eliminate Sink Marks in Injection Molding: Causes & Solutions
Sink marks are one of the most common and frustrating defects in injection molding. If you’ve ever noticed a localized depression or micro-dimple on the surface of a plastic part, you’re dealing with sink marks. While often considered a cosmetic issue, severe…
Alex Yu
Aug 06 2026
Injection Molding
Troubleshooting Poor Surface Gloss in Injection Molding: Causes & Solutions
A flawless surface finish is often the hallmark of high-quality injection molding. However, poor surface gloss is one of the most common defects manufacturers face. Because the plastic part is essentially a replica of the mold cavity, any issue in the tooling,…
Alex Yu
Jul 31 2026
Injection Molding
Why Do Injection Molded Parts Degrade? Causes and Effective Solutions
Plastic degradation is a common headache in the injection molding industry. Whether it appears as burn marks, discoloration, or brittleness, degraded plastic compromises the quality and strength of your final product. But what exactly causes this issue? Usually, the culprits fall into…
Alex Yu
May 20 2026
Injection Molding
Injection Molding Warpage: Causes, Prevention, and Correction Methods
Warpage, bending, and twisting are among the most common defects in plastic injection molding. These issues not only affect the aesthetics of the part but can also compromise its structural integrity and assembly. In this guide, we will explore the root causes…
Alex Yu
May 14 2026
Injection Molding
12 Ultimate Solutions to Eliminate Injection Molding Short Shots
Short shots (also known as underfills) occur when the molten plastic fails to completely fill the mold cavity, resulting in an incomplete part. This defect typically appears in thin-walled sections or areas farthest from the gate. > Pro Tip: For internal features…
Alex Yu
Mar 06 2026
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