Jiazhan (Dalian) Intelligent Equipment Technology Co., Ltd

Common problems and causes in the production of rubber products

Jul 24,2023

Common problems and causes in the production of rubber products

Any product has its own defects, and rubber products are no exception, mainly manifested in the lack of glue in the product; The glue edge is too thick, and the product is overweight; Curling, pumping edge; Crack; Bubble; Tearing of molded products; The product is too rough.

So, what are the causes and solutions for the defects of these rubber products. The following small series will explain them one by one.

1. Lack of rubber products for rubber products

The main reasons are:

Insufficient single consumption or insufficient glue loading of semi-finished products; The plate rises too fast, and the rubber material does not flow sufficiently; The mold cannot seal the rubber material; Poor mold exhaust conditions; The mold temperature is too high.

It can be solved from these aspects:

Determine the amount of glue in the mold from scratch; Slow down the plate ascent and deflate repeatedly; Improve mold design; Reduce mold temperature and speed up operation; Lower the mold temperature.

2. The rubber edge of the rubber product is too thick, and the product is overweight

The main reasons are: excessive glue loading; insufficient plate pressure; The mold does not have a corresponding residual tank.

It can be solved from these aspects: strictly control the unit consumption of semi-finished products; Increase plate pressure; Improve mold design.

3. Rubber products are rolled and drawn

The main reasons are: poor processing performance of rubber materials.

It can be solved from these aspects: the use of casting and injection methods to produce Mooney viscosity to reduce the rubber material.

4. Cracks in rubber products

The main reasons are: dirty glue; Excessive release agent; Scorched compound.

It can be solved from these aspects: ensuring the cleanliness of semi-finished products; rational use of isolates; Extend the scorch time.

5. Bubbles of rubber products

The main reasons are: the substance containing vulcanized decomposition gas in the compound is not completely vented during processing; The mold has no gas line.

It can be solved from these aspects: repeated deflating before mold closing, and the mold adds an exhaust line; Calcium oxide is added to the formula

6. Rubber products are torn out of molded products

The main reasons are: too much or too little isolate; The mold is opened too quickly and the force is uneven; Poor fluidity of rubber and poor adhesion of semi-finished products; The mold angle and chamfer are unreasonable.

It can be solved from these aspects: reasonable use of isolation agent, uniform force of the product when opening the mold, reducing the door viscosity of the rubber material, and improving the mold design.

7. Rubber products are too rough

The main reasons are: rough mold surface; The scorching time of the compound is too short.

It can be solved from these aspects: cleaning the mold; Extend the scorch time.

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