Rubber seal molding
Rubber seals are commonly used in the molding process to manufacture rubber products with complex shapes such as cups and seals. The molded rubber and plastic molds are used to place the rubber in the mold for heating.
Injection molding
Rubber seals are used for more complex rubber products. For example, tire treads, hoses, and wire surface coatings need to be manufactured by injection molding.
It is a method of putting a certain plasticity into a hopper of an extruder under the extrusion of a screw through a variety of mouth shapes, also called a template.
Before the extrusion, the rubber must be preheated to make the rubber soft and easy to extrude to obtain a rubber product with smooth surface and accurate size.
Calendering
Rubber seals are suitable for the manufacture of simple sheet and plate products. It is a method of pressing a rubber compound into a film having a certain thickness and a width by a calender, which is called calender molding.
Some rubber products such as tires, tapes, hoses, etc. must be coated with a thin layer of glue. The glue is also applied to the fibers, which is also called glue or rubber. The glue coating process is generally completed on the calender.
The fiber material needs to be dried and dipped and dried before calendering, in order to reduce the water content of the fiber material, so as to avoid evaporation of water and foaming, and to increase the temperature of the fiber material to ensure the quality of the calendering process.
Dipping is a necessary process before the glue is applied to improve the bonding properties of the fiber material and the rubber compound.