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Top 4 Rubber Manufacturing Processes.

There are various methods of manufacturing rubber. Every manufacturing process has its advantages in making an ideal type of product. Once you know the manufacturing processes, you can be in a position to understand their effects on sale and prices. The most common rubber manufacturing processes are Extrusion, latex dipping, molding, and Calendaring.

Extrusion commences with feeding a vulcanized compound to an extruder. A dye carries the extruder forward. The dye is special in manufacturing and assists in shaping the rubber. The compound is forced into the opening of the extruder by the process’ pressure, after putting the dye. Before becoming usable, the extruded product is vulcanized. This process has a high output and a lower production cost.

Latex dripping happens when the molds that are thinly walled are immersed in latex and then withdrawn slowly. The product can be dipped again into the compound to increase its thickness. The product is vulcanized when the dipping process occurs. Post treatment’s needs depends on the nature of the dipped product. This method can make bladders, rubber gloves, tubing, grips, and balloons.

Molding is comprised of three processes. They are compression molding, injection molding, and transfer molding. The oldest and cheapest method is compression molding. It can hold products with high viscosity and a poor flow. The process might however be time consuming and with a low rate of production. This method can make electrical insulators, wristbands, O-rings, silicon, and seals.

Transfer molding reduces the limitations associated with compression molding. The process commences with loading a blank in a chamber, and distributes it to various cavities. In this initial stage, pre-heating happens in the rubber, thus making the rubber to flow through the channels.

Injection molding is another form of molding. The injection unit and the press unit acts as two distinct entities with separate controls. An extruder unit is programmed in a certain way to serve several passes. This results into short injection processes. This minimizes handling blanks in the process. This eliminates the chances of handling blanks in the process. This can easily fill up hard cavities as well as flow channels.

By calendaring, the softened materials are forced into the middle of rotating rollers. Rollers compress the materials. The product’s thickness thus becomes determined by the gap between the cylinders. When compared to other processes, calendaring is more expensive.
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