One, mixing silicone rubber technology application

Mixing silicone rubber is a synthetic rubber made by adding silicone rubber raw rubber to a double roll rubber mixer or closed kneader and gradually adding silica, silicone oil and other additives. Can be used in aviation, cable, electronics, electrical appliances, chemical, instrument, cement, automobile, construction, food processing, medical equipment and other industries, used for molding, extrusion and other mechanical deep processing.

Two, mixing silicon rubber process method

Silicone rubber: mixing silicone rubber can be mixed without plasticizing. Generally, open mixing machine is used for mixing, and the roller temperature is not more than 50 degrees. When raw rubber is added, the front roller is wrapped, and after feeding powder, the roller is wrapped, so it should be operated on both sides.

Mixing is carried out in two stages:

The first stage: raw glue - reinforcing agent - structure control agent - heat-resistant additive - thin pass - next piece.

Section two: section one refining - vulcanizing agent - thin - parking. Silicon rubber miscellaneous parts.

Three, mixing silicone rubber forming process method

1, molding: the rubber material is cut into a certain shape, filled in the mold cavity, the mold is placed between the heated plate vulcanizing machine and the lower plate, and heated and pressurized according to the specified process, so that the rubber material is vulcanized, take off the mold to get a section of vulcanized silicone rubber products.

2. Transfer molding: the prepared rubber is loaded into the plug barrel on the upper part of the mold, heated and plasticized, with the help of the plunger pressure, the rubber enters the heating mold cavity through the casting port.

3, injection molding: put the rubber into the barrel of heating plasticizing, through the plunger or screw will directly inject the rubber through the nozzle into the closed mold cavity, under heating to achieve fast local curing.

4, extrusion molding: the mixing glue is forced through the mouth die extruded into a certain section shape products of continuous molding process method.

Therefore, when realizing the molding of silica gel products, the silicone product factory should choose the appropriate molding method according to the product and operation method. If the silicon rubber products with large quantity and light quality can choose transfer molding, rather than blind selection, it not only causes low production efficiency, but also causes losses to the factory.