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Companies engaged in plastics injection molding frequently encounter defects. It is not always possible to resolve such a problem on your own, so it is better to turn to professionals. Material Wizard specialists will perform an analysis and select a suitable technology. For example, the solution may lie in replacing the material with a more efficient one. This way, the business will not stand idle and costs will be reduced.

Material Wizard's solution — easy-to-mould polymers that resist defects!

What injection molding defects exist?

To successfully combat rejects, it is important to understand the main causes of their occurrence and the ways to prevent defects from forming. The injection molding of a polymer most often results in the following problems:

• Sink marks. Form due to the pressing-in of the moulded part after shrinkage and contraction as the temperature falls.
• Jetting marks. Occur due to a small cross-section of the gate and an abrupt change in cavity volume.
• Black specks. Particles on the part that appear on its opaque areas.
• Silver streaks. Outwardly resemble ordinary spots on the surface.
• Burn marks. Appear at the injection points and reveal weak spots of the material.
• Clear spots. Appear when non-plasticized granulate is used.
• Adverse change in mechanical properties. Indicates an incorrect processing technology.
• Warping. Related to varying wall thickness of the moulding and uneven shrinkage.
• Low-quality weld lines. Occur due to the inability of the two flow fronts of the material used to join together.
• Formation of fine cracks. Sometimes form as a fine mesh on a particular surface or run across the entire part.
• Material delamination. The surface of the part obtained during molding consists of several resin layers; in places where there is a risk of delamination, build-ups form that look like fish scales.
• Low gloss. Occurs due to rapid filling and appears as a rough surface.

MW specialists will find a solution to a problem of any complexity, allowing your business to operate normally. Our track record includes many years of experience, innovative problem-solving methods and the continuous introduction of new technologies — all of which guarantees the desired result.