How to solve the problems of flow marks and burrs in silicone products

I believe many silicone product manufacturers have encountered flow marks and burrs when producing products (as shown in the following figure); The quality of silicone products that encounter such problems is definitely not up to par.

How to solve the problems of flow marks and burrs? To solve a problem, one must first know the cause of its occurrence.

Determine the reasons for flow marks and burrs in silicone products, and determine the silicone raw materials and related additives, such as: Is silicone ordinary silicone or platinum vulcanized silicone? Is the color masterbatch using a colorant or a pre dispersed substance? Because flow marks are related to silicone mixing, reducing mold temperature and sufficient mixing can reduce or eliminate flow marks.

For the reasons for burrs: 1. Excessive material weight; 2. Exhaust too many times, resulting in high mold temperature. Solution: The mold joint line needs to be polished with an oilstone; Add frozen trimming, etc.