The Most Common Rubber Manufacturing Processes.
There are numerous processes to use when manufacturing rubber. Each process is good on its way in making a certain rubber category. Once you know the manufacturing processes, you can be in a position to understand their effects on sale and prices. Molding, calendaring, latex dripping and extrusion are the most common rubber processing methods.
Extrusion begins by dipping an extruder with a vulcanized compound. a dye carries the extruder upon putting it. 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. For it to become useful, the extruded product is vulcanized. Every rubber compound ought to have a cure package that is usually blended before vulcanization.
Latex dripping happens when molds that are thinly walled are put into latex molds and later withdrawn slowly. You can re-dip the product in the latex with an aim to increase its thickness. After the dipping process occurs, the product is then vulcanized. The need of post treatments is determined by the nature of the dipped product. The products that result from this method include grips, bladders, rubber gloves, tubing, and balloons among others.
There are three processes in molding. They are compression molding, injection molding, and transfer molding. The least expensive and oldest method is compression molding. The advantages of using this method are the suitability of rubber compounds that have a large surface area, and it’s suitability in rubber compounds that have a poor flow property and a high viscosity. The process might however be time consuming and with a low rate of production. O-rings, silicon, electrical insulators, seals, and wristbands can be made using this method.
Transfer molding limits the limitations of compression and 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.
Finally, there is injection molding. The injection and press units are two distinct units and have different controls. An extruder unit serves several passes by moving in a certain programmed way. This results into short injection processes. This minimizes handling blanks in the process. This eliminates the chances of handling blanks in the process. Hard cavities and flow channels can easily be filled.
By calendaring, the softened materials are forced into the middle of rotating rollers. Rollers compress the materials. The thickness of the materials is a result of the thickness between the cylinders. When compared to other processes, calendaring is more expensive.