INDUCTION HEATING EQUIPMENT FOR BONDING

Bonding has become more widespread as a preferred method of assembly especially in the automotive industry. The method involves accelerating the polymerization of the adhesive by heating the metal parts to be bonded by induction heating equipment. The temperatures required are generally low in the 150 to 300†C. This process is now extensively used to manufacture automotive body parts such as doors, hoods and rear deck lids. Metal to polyester bonds can also be treated by induction heating equipment.

There are essentially two techniques presently being used in industry for applying this technology:
1. Heating of the entire perimeter to be bonded which in this case involves an inductor which has the same contour as the part being bonded.
2. Heating of specific segments or spot heating in which case the polymerization zones are heated using small flat magnetic circuit inductors.

With respect to spot bonding, the advantages of this process are as follows:

• The part bonded is not marked therefore there are no after painting defects and polishing is not required.
  

• Less power consumption with induction heating equipment.
  

• No corrosion problems associated with welding points.
  

• Adhesive may be combined with sealing strip.

DRAWING OF FIBER OPTICS

Drawing furnaces are used to heat pre-formed quartz with a maximum diameter of 80 mm to a temperature of 2,200 °C followed by a continuous drawing process to produce fiber optics at speeds of up to and exceeding approximately 4,000ft/min. Indirect induction heating is applied using graphite susceptor which enables precise control of furnace temperature.

In order to protect the fiber and also prevent the graphite crucible igniting, a neutral gas atmosphere such as Argon is maintained in the chamber. thermal inertia is reduced to a minimum. The power consumed by the transistorized power supply lies generally between 25 & 50 kW at a nominal operating frequency of approximately 15 kHz.

HEAT SEALING

Induction heating sealing process is used extensively in today's packaging of food and medical products. Several types of systems are used for this process which involves one-step sealing, continuous sealing before encapsulation or static sealing before encapsulation.

ATMOSPHERE & VACUUM FURNACE

Induction heating equipment is also used for high-temperature vacuum or heating under an atmosphere for such processes as infiltration and treatment of composites. These materials must be subjected to long heating cycles last several days at high temperatures, up to 2,200°C at various gas and vacuum pressures. Multizone heating is often used with MF power exceeding 1000 kW.

SKULL HEATING & MELTING of GLASS

Glass, salts and oxides can be reheated using induction heating. This method results in exceptional energy efficiency, a high quality product and there are no wearing parts to be concerned about replacing. The overall process is easily controlled using our extremely flexible power supplies.

INDUCTION HEATING EQUIPMENT FOR CRUCIBLE FURNACE MELTING

A crucible furnace consists essentially of a water cooled induction heating coil would around a refractory lining made of a ramming material mixture which forms a crucible that holds the molten metal. this type of melting furnace is used primarily in steel and iron foundries, however they are also used for melting nonferrous metals.

INDUCTION POST TREATMENT AFTER COIL JOINING

This process involves annealing or normalizing the area of sheet steel that has been butt-welded to join two coils of metal. System is capable of heating and cooling joined area on a continuous high-resistance steel strip line.

COLD CRUCIBLE MELTING

This technique is used to melt materials with extremely high melting points that are typically between 2,000 to 3,000° C. This method is also known as levitation melting and is used to develop very special metals that are free from contamination that might result from contact with materials in a conventional melting crucible.