Hello everyone, I am the editor. Today I will introduce rubber products to you. The following content is compiled by the editor and the relevant content is for reference only.

1. Rubber products lack glue

The main reasons are:

The semi-finished product unit consumption is insufficient or the glue loading is insufficient; the plate rises too fast, and the rubber does not flow fully; the mold cannot seal the rubber; the mold exhaust condition is not good; the mold temperature is too high.

It can be solved from these aspects:

Redetermine the mold glue loading; slow down the plate rising speed and repeatedly deflate; improve mold design; reduce mold temperature, speed up operation speed; reduce mold temperature.

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

The main reasons are: the glue loading is too large; the plate pressure is insufficient; the mold does not have a corresponding residual glue groove.

It can be solved from these aspects: strictly control the semi-finished product unit consumption; increase the plate pressure; improve the mold design.

3. Rubber products curling, drawing and shrinking

The main reasons are: poor processing performance of rubber.

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

4. Cracks in rubber products

The main reasons are: dirty rubber; too much isolation agent; scorched rubber.

It can be solved from these aspects: ensure the cleanliness of semi-finished products; use isolation agents reasonably; extend the scorch time.

5. Rubber product bubbles

The main reasons are: the material containing the gas of sulfide decomposition in the compounding agent is trapped during the process, and the air in the mold cavity is not completely exhausted; the mold has no exhaust line.

It can be solved from these aspects: repeatedly deflate before closing the mold, add exhaust lines to the mold; add calcium oxide to the formula

6. Rubber products tear when the mold is out of the mold

The main reasons are: too much or too little isolation agent; too fast mold opening, uneven force; poor fluidity of the rubber material, poor adhesion of the semi-finished product; unreasonable mold edges and chamfers.

It can be solved from these aspects: reasonable use of isolation agents, uniform force on the product when opening the mold, reduce the gate viscosity of the rubber material, and improve the mold design.

7. Rubber products are too rough

The main reasons are: rough mold surface; too short scorch time of the mixed rubber.

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

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