The technology of pneumatic's has gained tremendous importance in the field of workplace rationalization and automation from old-fashioned timber works and coal mines to modern machine shops and space robots. It is therefore important that technicians and engineers should have a good knowledge of pneumatic system, air operated valves and accessories. The air is compressed in an air compressor and from the compressor plant the flow medium is transmitted to the pneumatic cylinder through a well laid pipe line system. To maintain optimum efficiency of pneumatic system, it is of vital importance that pressure drop between generation and consumption of compressed air is kept very low.

The aim is to design and develop a control system based an electronically controlled automotive pneumatic vulcanizing machine”. In our project is consists of heat sensor circuit, solenoid valve and Pneumatic cylinder. The heat sensor is used to detect the heating coil temperature. In our project, the heat sensor temperature is varied by adjusting the variable braking system.

What Is Vulcanizing ?
Vulcanization, chemical process by which the physical properties of natural or synthetic rubber are improved; finished rubber has higher tensile strength and resistance to swelling and abrasion, and is elastic over a greater range of temperatures. In its simplest form, vulcanization is brought about by heating rubber with sulfur.

A variety of methods exist for vulcanization. The economically most important method (vulcanization of tires) uses high pressure and temperature after the curative has been added to the rubber. A typical vulcanization temperature for a passenger tire is 10 minutes at 170 °C. This process employs the technique known as compression molding, where the rubber article is intended to adopt the shape of the mold. Other methods, for instance to make door profiles for cars, use hot air vulcanization or microwave heated vulcanization (both continuous processes).

Vulcanized materials are less sticky and have superior mechanical properties. The term vulcanized fibre refers to cellulose that has been treated in a zinc chloride solution to cross-link the cellulose fibers.


The impartant components of our project are,

  • Heat Sensor
  • Control Unit with Power supply
  • Solenoid Valve
  • Flow control Valve
  • Compressor
The heating coil is drawn power from the 230V a.c supply. The heating coil temperature is changed by adjusting the variable resistor temperature value. So the coil gets heated up to the particular temperature.

The tube is fixed on the base of the L-bracket. The Heating coil is fixed bellow the L-bracket bed. The vulcanize tube side is kept above the heating coil. The tube gets heated to the particular temperature. The control unit gives the supply to the solenoid valve, so that the pneumatic cylinder is in forward stroke. After reaching the set temperature value, automatically the solenoid valve supply is cut by the sensor unit. The ram is release to the previous position after vulcanization process completed. This machine is compact in size and semi-automated one. Time consumption during the operation is very less when compared to the manual operation.

  1. Automobile Applications-tyres 
  2. Shoe Soles, Hoses, and Conveyor belts are made by Vulcanized rubber.
  1. Compact size and portable
  2. Easy to move from one place to another place
  3. Operating principle is simple. 
  4. Non-skilled person also operate this machine
  5. Time conception is very less when compare to the manual machine
  6. Heating coil temperature is varied one.
  7. Automatic thermostat is used to maintain the particular temperature
  8. The force required to operate this system is low.
  1. May be the choice of air leakage problems
  2. We need the compressed air
  3. May be the chance of over heating the tube.

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