Application of high frequency induction heating machine in optical cable manufacture

The Joule is filled with the heat generated by the electrolyte in the capillary in a high electric field.

High-frequency heating machine full name "High-frequency Induction heating Machine", also known as high-frequency induction heating equipment, high-frequency induction heating device, high-frequency heating power, high-frequency power supply, high-frequency welding machine, high-frequency induction heating machine, high-frequency induction heaters (welding), etc., it is mainly to the metal induction heating (non-contact) Can heat the metal very quickly, has the advantages of saving electricity, small volume, convenient installation, convenient operation, safe and reliable, heating speed and so on, the application range is very wide.

With the rapid development of Internet services, 3G (3rd generation third generation mobile communication technology) business and multimedia applications, the network business volume is rapidly expanding exponentially, which requires the network to have high bit rate data transmission capability and large throughput crossover capability. With the advent of optical fiber communication technology, the large potential bandwidth capacity of nearly 30THz has brought the flourishing opportunity to the communication field, especially since the information superhighway was put forward, the optical technology began to permeate the whole communication network, and the optical fiber communication has the trend of advancing to all optical network. Optical fiber communication has gone through more than 20 years in our country. The market is the lifeblood of the industry, Price is the lifeblood of enterprises, how to reasonably reduce product costs, improve product quality, to ensure that users use the requirements, is the most important enterprises. This paper mainly introduces the contrast of the traditional cable ladle injection method and the new technology-high frequency induction heating.

Introduction of the principle

It is well known that the water permeability of optical cables is a strict requirement of each user an environmental performance index, and the steel-clad cable is easy to water seepage in the strip lap, the traditional way is generally used hot melt adhesive filling, so that the steel tape lap connecting place completely adhesion to prevent seepage. But the traditional way has many disadvantages, if the amount of glue will cause seepage, too much glue will cause the package to squeeze out when the bag occurs, it is difficult to control the amount of glue, but also because of the steel surface polyester film bonding in the mold core of the accumulation of packaging and caused by the phenomenon of casing. The new technology adopts high frequency induction heating principle to make the steel strip surface covered with film melting, not only makes the steel belt lap joints firm, but also enhances the bond strength between the steel belt and the sheath, thoroughly solves the seepage problem and the sheath out package phenomenon.

High-frequency Induction heating principle is the dielectric material in the high-frequency electric field in the role of molecular polarization, and in accordance with the direction of electric field, because high-frequency electric field at a very rapid speed change in molecular direction, the dielectric materials will be due to dielectric loss and fever. High-frequency currents flow to a heating coil (usually controlled by copper) that is wound into a ring or other shape. A strong magnetic beam that produces a momentary change in polarity in the online circle, the metal and other heated matter placed in the online circle, the magnetic beam will be through the whole of the heated matter, in the heated matter in the opposite direction of heating current produced a large eddy current, due to the heat in the material of the resistance to produce coke Joule, so that the temperature of the material itself rising rapidly, This is the principle of induction heating.

Second, high-frequency induction heating machine wide range of uses.

High-frequency heating function of all metals for rapid heating, such as: Iron, steel, cast iron, stainless steel, copper, aluminum, tin, gold, silver ... Wait

1, hot forging industry---the whole forging, local forging, bit suppression.

2, welding---all kinds of metal products brazing, tool blade welding, copper pipe welding (in the cable manufacturing industry can be used for steel tape lap welding).

3, heat treatment---metal quenching, annealing, tempering, especially local treatment (in the optical cable manufacturing industry can be used for sheath material and metal strip stripping).

4, Smelting---casting smelting, precious metal smelting, small laboratory smelting.

5, other applications---powder coating, metal implantation plastic, heating to the oil (in the optical cable manufacturing industry can be used for steel wire to squeeze the cushion layer of steel wire to go oil, impurities).

Third, the application of traditional hot melt adhesive machine and high-frequency welding situation comparison

High-frequency induction heating machine, belongs to high-frequency medium heating equipment. The cable core behind the ladle is placed between the electrodes produced by the device, and an alternating current is used to flow to a conductor curled into a ring (usually a copper tube), this produces a magnetic beam, the steel belt after the cable core through the copper tube, the magnetic beam will be through the steel strip, and the magnetic beam in the direction of the production of Eddy current (rotating current), the induction effect at this time, As the resistance in the steel band produces a joule (1 square R), the temperature rises rapidly, which is induction heating. This can be heated in a state where the steel strip is not in contact. (Heat has the joule of Coke and hysteresis loss, but it is mainly caused by Coke Joule.) When the steel strip is heated by high frequency, the polyester film on the steel strip surface is heated and melted, and the lap steel strip uses its own polyester film to realize adhesion, which achieves the effect of the steel strip lap water resistance. The external sheath directly with the polyester film, not only increased the bonding strength between the steel belt and the outer sheath, but also removed the ladle cable steel tape covering, hot melt adhesive frequently out of the bag problem.

According to the YD/T901-2001 core network, the 4.3.2.2 requirements in the standard of optical cable-layer-stranded communication outdoor optical cable.

The peel strength between the aluminum (or steel) tape and the polyethylene sleeve of the adhesive sheath (including the 53 type outer layer) and the overlap overlap place between the aluminum (or steel) belt shall be not less than 1.4n/mm, however, when the aluminum (or steel) strip is filled or coated with a composite to prevent water, the aluminum (or steel) band lap can not be used as a numerical requirement. Table 1 Comparison of traditional hot melt adhesive machine and high frequency welding

Project Hot Melt Adhesive Mode High frequency welding method

Equipment Price 40,000 Yuan RMB 10,000 yuan

Hot Melt Adhesive 0.6kg/km No

Power consumption 4KW 15KW

Water consumption without circulating water

The appearance is easy to pack out the package

Easy to operate control operation

Environmental protection consumes energy without pollution

Peel strength of Steel belt and sheath ≧1.4n/mm≧3.8n/mm

≧1.8n/mm≧2.6n/mm of peel strength between steel strip and lap

Iv. advantages and characteristics of high frequency induction heating machine

Advantages of high frequency induction heating machine

1, can be quickly heated.

Compared with other methods, the temperature of the desired target can be heated in seconds.

2, can be local heating.

Only the steel strip is heated to produce heat from the steel strip to melt the polyester film, without any damage to the other parts of the cable.

3, Save energy.

In addition to working hours, only standby power can be, very reasonable energy saving.

4, can be in a relatively stable temperature automatic operation.

Even if the production staff is not skilled enough to ensure the normal operation of equipment.

5, green Environmental protection.

Does not produce harmful substances.

6, according to the quality of the heated object, heating time, temperature, to adjust the high-frequency output.

Characteristics of high Frequency induction heating machine:

1, all solid-state IGBT frequency conversion and function adjustment, soft switch resonant double regulation and frequency automatic tracking technology, is the guarantee of high reliability;

2, super small volume, for customers to save 10 times times the production space;

3, high efficiency and energy saving, full power range, high power factor and power efficiency;

4, broadband 1~20khz frequency automatic tracking adaptability, without on-site commissioning;

5, 100% full load, 24 hours continuous working ability;

6, constant output voltage/constant output power control selection function;

7. The frequency, power, voltage and current are all displayed.

V. Results of the Test

After nearly one months of process testing and tracking, by high-frequency induction heating machine to deal with the cable-core sheath without water permeability, no mold core accumulation of plastic film, no sheath out of the phenomenon of packaging. At the same time, the peeling strength between the sheath and the steel strip was sampled, the concrete results are shown in table 2, the peel strength between the steel band lap is sampled, and the concrete results are shown in table 3. High-frequency induction heating machine production of optical cables made of optical cable full performance test and all qualified, here is not a list of test results.

Vi. Conclusion

I believe that through my introduction, you have a high frequency induction heating machine and the working principle of more understanding. Through the comparison of two different methods, the advantages of high frequency heating machine in optical fiber fabrication are fully explained, and it is believed that it will be widely used in the near future.