Common problems and causes of rubber products production

The main reasons are:
The unit consumption of semi-finished products is insufficient or the amount of glue is insufficient; The flat plate rises too fast, and the rubber does not fully flow; The mold cannot seal the rubber; The die exhaust condition is poor; The mold temperature is too high.
It can be solved from these aspects:
Re-determine the amount of glue in the mold; Slow down the rising speed of the plate and bleed repeatedly; Improve mold design; Reduce mold temperature and speed up operation; Reduce mold temperature.
2. The rubber edge is too thick and the product is overweight
The main reasons are: too much glue; Insufficient plate pressure; The mold has no corresponding residual rubber groove.
It can be solved from these aspects: strictly control the unit consumption of semi-finished products; Increase the plate pressure; Improve mold design.
3. Rubber products crimping, edge pulling and edge shrinking
The main reasons are: poor processing performance of rubber.
It can be solved from these aspects: reduce the Mooney viscosity of the rubber by casting and injection.
4. Cracks in rubber products
The main reasons are: the rubber is dirty; Too much isolating agent; The rubber is burnt.
It can be solved from these aspects: ensure the cleanness of semi-finished products; Reasonable use of isolating agent; Prolong the scorching time.
5. Rubber products bubble
The main reasons are as follows: the air in the mold cavity is not completely exhausted during the processing of materials containing sulfurized decomposition gas in the compounding agent; The mold has no exhaust line.
It can be solved from these aspects: repeatedly deflate before mold closing, and open the vent line for the mold; Add calcium oxide into the formula
6. Tear of molded rubber products
The main reasons are: too much or too little isolation agent; The formwork is opened too fast and the stress is uneven; The fluidity of rubber is poor, and the adhesion of semi-finished products is poor; The mold corners and chamfers are unreasonable.
It can be solved from these aspects: reasonably use the isolating agent, evenly stress the product when opening the mold, reduce the door viscosity of the rubber, and improve the mold design.
7. Rubber products are too rough
The main reasons are: the mold surface is rough; The coking time of rubber blend is too short.
It can be solved from these aspects: cleaning the mold; Prolong the scorching time.
The main reasons are:
The unit consumption of semi-finished products is insufficient or the amount of glue is insufficient; The flat plate rises too fast, and the rubber does not fully flow; The mold cannot seal the rubber; The die exhaust condition is poor; The mold temperature is too high.
It can be solved from these aspects:
Re-determine the amount of glue in the mold; Slow down the rising speed of the plate and bleed repeatedly; Improve mold design; Reduce mold temperature and speed up operation; Reduce mold temperature.
2. The rubber edge of rubber products is too thick, and the products are overweight
The main reasons are: too much glue; Insufficient plate pressure; The mold has no corresponding residual rubber groove.
It can be solved from these aspects: strictly control the unit consumption of semi-finished products; Increase the plate pressure; Improve mold design.
3. Rubber products crimping, edge pulling and edge shrinking
The main reasons are: poor processing performance of rubber.
It can be solved from these aspects: reduce the Mooney viscosity of the rubber by casting and injection.
4. Cracks in rubber products
The main reasons are: the rubber is dirty; Too much isolating agent; The rubber is burnt.
It can be solved from these aspects: ensure the cleanness of semi-finished products; Reasonable use of isolating agent; Prolong the scorching time.
5. Rubber products bubble
The main reasons are as follows: the air in the mold cavity is not completely exhausted during the processing of materials containing sulfurized decomposition gas in the compounding agent; The mold has no exhaust line.
It can be solved from these aspects: repeatedly deflate before mold closing, and open the vent line for the mold; Add calcium oxide into the formula
6. Tear of molded rubber products
The main reasons are: too much or too little isolation agent; The formwork is opened too fast and the stress is uneven; The fluidity of rubber is poor, and the adhesion of semi-finished products is poor; The mold corners and chamfers are unreasonable.
It can be solved from these aspects: reasonably use the isolating agent, evenly stress the product when opening the mold, reduce the door viscosity of the rubber, and improve the mold design.
7. Rubber products are too rough
The main reasons are: the mold surface is rough; The coking time of rubber blend is too short.
It can be solved from these aspects: cleaning the mold; Prolong the scorching time.