Glossary: What is flow ratio (L/t)?

The "flow ratio" (flow ratio) is an indicator of how effectively the molten resin flows through the mold. Specifically, the flow ratio is defined as

　　　　　　　　Flow length: Maximum distance resin can flow in the mold (L)

　　　　　　　　　　Thickness: Thickness of the layer of flowing resin (t)　　　　　　　　　　　

Flow ratio is an important parameter in the injection molding process. The reasons are as follows

Molded product quality: An improper flow ratio can cause defects in the molded product. For example, insufficient flow length may result in short shots in the molded product, resulting in a less than perfect shape.

Material Selection: Flow ratio also affects the choice of material to be used. Different materials have different flow properties, which can be used as a guide in selecting the right material for a particular shape or size part.

　　　　　　　　　　　　　　　　　L/t values by material

Proper understanding and control of the flow ratio for each material used can significantly improve the efficiency and quality of the injection molding process.

Setting Process Conditions: Flow ratio also plays an important role in setting process conditions such as injection pressure, temperature, and injection speed. Ensuring the proper flow ratio optimizes the efficiency of the process and results in a quality molded product.