Why Are Molded Products Fragile?

There are several reasons why your molded product might be fragile. Here are some common causes:

Material Issues

The type of material used can significantly impact the strength of the final product. Using a material that is not suitable for the intended application can result in a fragile product.

Processing Parameters

Incorrect processing parameters, such as temperature, pressure, and cooling time, can lead to defects. For example, if the cooling time is too short, the product may not solidify properly, making it fragile. A good chiller ensures that the mold temperature is kept within the optimal range throughout the molding process, helping achieve uniform cooling and maintaining the product's structural integrity.

Mold Design

The design of the mold itself can affect the strength of the product. Issues like non-uniform wall thickness, sharp corners, and inadequate support structures can lead to weak points in the product.

Injection Molding Defects

Defects such as warping, sink marks, and voids can compromise the structural integrity of the product. These defects are often caused by uneven cooling, improper gate size, or incorrect packing pressure.

Material Degradation

If the material is exposed to high temperatures for too long, it can degrade, resulting in a weaker product.

Solutions

To address these issues, review the material selection, optimize processing parameters, and ensure the mold design is robust.