How to reduce the defective rate of silicone products:

In the process of producing silica gel products, there will be bad products. What are the reasons for the problems?

1、 Uneven thickness of silicone rubber products is also a common defect, mainly including the following points:

1. Pad the mold with silica gel or paper.

2. If the product is too thick, the mold temperature can be appropriately reduced and the curing time can be prolonged.

3. If the bulging is caused by immature, the curing time can be appropriately increased.

2、 Glue opening

Poor opening is generally the problem of silicone rubber raw materials. Check whether the raw materials have the following problems:

1. The plastic value is small and the initial viscosity is small

2. The glue has slight self sulfur.

3. It can also be solved by increasing the gum content.

3、 Surface frosting

Silica gel products are easy to spray frost for the following reasons:

1. The curing time is not long enough.

2. The curing system needs to be improved.

3. The mixing roller temperature is too high, and the air temperature or humidity is too high.

4. The compounding agent is not fully dispersed due to uneven mixing of the rubber or insufficient storage time.

5. Rubber is easy to spray frost after aging

6. It is necessary to master the upper limit dosage of several formulations that are easy to spray frost, otherwise it is difficult to avoid spraying frost.

4、 Micropores of rubber parts

Micropores occur on the surface of silica gel products, which is difficult for customers to accept if it is a class a appearance. The main reason for the defects is that the raw materials are too wet

After the material is baked, it can be reused. The mixed rubber can be solved by adding part of Cao.

5、 Trapped

Gas trapping of silica gel products will cause great confusion in production, which is mainly related to the mold. Therefore, the exhaust problem should be considered in the mold design:

1. Exhaust times are not enough.

2. The mold is unreasonable, and the exhaust slot is added.

3. Conduct secondary exhaust for appropriate products.

4. Spray a small amount of release agent.

6、 Bubble

If bubbles are produced on the surface of silica gel products, the following points can be improved:

1. Mold temperature is too high.

2. The curing time is too long.

3. Increase the exhaust times.

7、 Unfamiliar

Improvement method for immature silicone rubber products:

1. The temperature is not high enough.

2. The curing time is not long enough.

3. The curing system needs to be improved.

4. Secondary vulcanization can be performed.