Common Injection Mould Defects and Their Solutions
China injection moulds can deliver efficient high-volume production, provided that you catch defects early. Left unchecked, minor flaws can ruin the aesthetics of your moulded parts, while serious issues destroy their strength and safety. You can avoid many of these problems as long as you understand what causes them. When you know what to look for, you can reduce waste and avoid costly rework. Plus, you can prevent your products from becoming unsellable. Here are some of the most common China injection mould defects, along with why they happen and how manufacturers can minimise them. Flow lines Flow lines are those wavy marks or bands you might see on the surface of your moulded part. They're often a slightly different colour from the surrounding material and usually show up around narrow sections or near the mould gates where the molten plastic enters the cavity. Although flow lines don't usually affect your part’s function, they can be a problem for products wher...