Standard molding machines, semi-automatic machines, and injection molding machines with different closing forces and different dimensions of clamping plates are used for product manufacturing.
Molded rubber products are designed primarily for flexible storage of moving parts of machinery. Sealing elements are used to seal machine parts filled with oils, fats, fuels, and other industrial fluids. These products are made of materials based on all known elastomers. To determine the use, the mold is important. It determines both the final product and the specification of the production process. At present, there are the following types of the production process:
CM – (compression molding) compression molding is a production technology in which the raw mixture is inserted directly into the impression of the heated mold and when the mold is closed, the component is shaped and the rubber mixture is vulcanized.
TM – (transfer molding) transfer molding is a production technology in which the raw mixture is inserted into a chamber (reservoir) and when closing the mold, there is a transfer from the chamber to the impression of the heated mold through inlet holes and subsequent vulcanization of the rubber mixture.
IM – (injection molding) injection molding is a production technology in which the raw mixture is inserted into the screw of a vulcanizing molding machine, which fills the chamber (reservoir) and then, hydraulically, injects from the chamber into the impression of heated and closed mold through inlet holes. Subsequently, the rubber mixture is vulcanized.
The properties of the products depend on technology and the choice of material. The most common areas of application are the engineering industry, pulp and paper industry, woodworking, mining, glass, electrical, chemical, construction.
Designs – are produced in several shapes according to mold and technology. Dimensions up to 350x700x1000 mm, component weight 500 kg, rubber weight 60 kg, hardness range of 30 – 100 °ShA.
Material basis – these gaskets can be made of multiple types of homogeneous mixtures and hardnesses – depending on the conditions of use. These are materials such as EPDM, NBR, SBR, FKM, MVQ. The specific weight is around 1.3 g / cm3 with a hardness range from 40 to 80 °ShA.