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Rubber Vulcanization



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At Tamor SMR Ltd, manufacturing of Rubber Bonded to Metal and Rubber Molded items is achieved through the processes of:
  • Injection Molding
  • Transfer Molding
  • Compression Molding
Tamor SMR takes the rubber, implements the various molding methods on its production floor and produces high quality, durable and reliable end products for industrial applications in Defense, Transportation and other Commercial sectors.

Injection Molding involves preheating the rubber compound while it's being processed through an extruder.  Using high pressure, the compound is injected into the mold cavity for a certain time, pressure and temperature.  Typical items include high quantity small products weighing between a few grams to several kilograms. Cycle time is relatively short and the injection presses and the molds are relatively expensive.

Transfer Molding is a technique that combines injection and compression molding technologies.  Transfer molding requires building a "piston and cylinder"-like device in the mold and squirting the rubber into it through small holes. When the mold is closed and under hydraulic pressure, the rubber is forced through the small hole into the cavity where it cures.  Transfer molding is usually used for heavier rubber parts or in places where it is desirous to shorten the cycle time and produce rubber with uniform properties.  Transfer molds are more expensive than the ones used in compression molding.

Compression Molding is the classic rubber vulcanization method. A defined excess amount of the bulk rubber compound is placed in the cavity of the mold. Using increased pressure and temperature, the rubber compound is formed. It is the excess material in the cavity that provides the required pressure. Molds are relatively simple and help in studying shrinkage of rubber and producing first samples of various rubber compounds.  This method is generally the most suitable method for low and medium sized serial production.
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