JPH03274110A - Vulcanizing system for tire by induction heating - Google Patents

Abstract

PURPOSE:To reduce the facility of a high frequency generator by providing two high frequency power generators at a plurality of tire vulcanizing machines, and providing a time vulcanizing machine selecting and switching functions to become a maximum load at one generator. CONSTITUTION:When a tire vulcanizing machine 5A starts vulcanizing, high frequency power is supplied from a large power high frequency generator 8 through a controller 6A for one min. In the meantime, the other vulcanizing machines are so limited as not to execute a vulcanization starting step. High frequency power is supplied from a power generator 9 to the other machines through controllers 7B-L. If the machine 5A finishes the starting step, the power from the generator 8 is switched to the machine 5B by a power switch 13B, and the machine 5B performs the starting step. The machine 5A is switched at power supply to the controller 7A to continue the vulcanizing step. Thus, a circuit for supplying large power is sequentially switched from A to L through the controller 6 to be operated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an induction heating method applied to a mold of a tire vulcanizer.

[Conventional technology]

(11) Conventionally, the mold heating method of a tire vulcanizer was conducted using steam or non-conductive heating.Recently, instead of steam heating, a method has been proposed in which the mold is directly heated by induction heating.

(2) Mold heating of a tire vulcanizer by induction heating is known for a heating method for one vulcanizer, but a method for heating a plurality of vulcanizers is unknown.

(3) As shown in FIG. 3, conventional induction heating is comprised of a tire vulcanizer mold 1.2, a coil 3, and a high-frequency power generator 4.

In this method, as shown in FIG. 4, a large high frequency power is required to heat the mold from a cooled state or for heating at the start of vulcanization, and a small high frequency power is required during vulcanization.

Instead of using a small high frequency power during vulcanization, there is also a method of intermittently outputting a large high frequency power as shown in FIG.

[Problem to be solved by the invention]

In the conventional induction heating method, as shown in FIGS. 4 and 5, there is a large difference between the amount of power required at the start of vulcanization and the amount of power required during vulcanization. For this reason, it was necessary to provide a large-capacity high-frequency power generator for each tire vulcanizer.

[Means to solve the problem]

A tire vulcanizer is not installed in one unit, but in plural units. Therefore, the vulcanization process is different for each vulcanizer,
There are no processes that require large amounts of power at the start of vulcanization. Therefore, among the multiple vulcanizers, power is supplied from the waste 1 high-frequency power generator to the vulcanizer during the vulcanization start process.
The vulcanizer during the remaining vulcanization is powered by a /162 high frequency generator.

In other words, one high-frequency power generator can be used for peak loads, and the other devices can be used for constant loads, allowing for optimal operation of the high-frequency power generators.

[Effect]

Peak load power is supplied from a high-frequency power generator to the tire vulcanizer during the vulcanization start process.

Constant load power is supplied from the 42 high frequency power generator to the tire vulcanizer during vulcanization.

〔Example〕

In FIGS. 1 and 2, 5 is a tire vulcanizer, 6 is a high-power controller, 7 is a low-power controller, 8 is a high-output high-frequency generator, 9 is a low-output high-frequency generator, and 10 is a low-power high-frequency generator. A current transformer, 11 is a power factor correction capacitor, 13 is a variable resistor for output adjustment, 13 is a power disconnector, 14 is a controller, 15 is a variable resistor, and 16 is a high frequency power generator.

In FIG. 1, 12 tire vulcanizers 5, A and L, are operated in parallel. In the vulcanizer 5, as shown in FIG. 3, an induction heating coil 3 is wound around the molds 1 and 2, and this coil is connected to a high power feeder 17 and a low power feeder 1.
8 are connected in parallel. The output of the high frequency power is controlled by a large power controller 6 and a small power controller 7. High frequency power is supplied from one large output high frequency generator 8 to p controllers 6, and from another small output high frequency generator 9 to the leather controller 7.

The controllers 6 and 7 are composed of a current transformer 1O1 for impedance matching between the mold and the power supply, a power factor correction capacitor 11 for compensating the reactive power of the mold, a variable resistor for output adjustment, and a power disconnector 13. There is.

The variable resistance ratio is divided into one for high output built into the controller 6 and one for small output built into the controller 7, allowing efficient load control.

The induction heating of the plurality of tire vulcanizers 5 shown in FIG.
FIG. 2 shows an example in which one high-frequency power generator has 16 outputs. In this method, the controller 14 uses a large-range variable resistor 15 to accommodate load adjustment from high power to low power.

In the embodiment shown in FIG. 1, when the tire vulcanizer 5A starts vulcanization, high-frequency power is supplied from the high-power high-frequency generator 8 for one minute through the controller 6A.

During this time, other vulcanizers are restricted from performing the vulcanization start process. During this time, the other vulcanizers are connected from the power generator 9 to the controller 7.
High frequency power is supplied through B-L.

When the five tire vulcanizers finish the vulcanization start process, the power from the power generator 8 is switched to the tire vulcanizer 5B by the power disconnector 13B, and the tire vulcanizer 5B starts the vulcanization start process. . The tire vulcanizer 5A continues the vulcanizing process with the power supply switched to the controller 7A. In this way, the controller 6
The circuits that supply high power through the vulcanizers A to L are switched one after another and operated.

In the embodiment shown in FIG. 2, when the tire vulcanizer 5A is at the start of vulcanization, the variable resistor 15A is adjusted to supply high power. At this time, other vulcanizers are restricted during the vulcanization start process to prevent redness. Next, when the tire vulcanizer 5A completes the vulcanization start process, the variable resistor 15A is adjusted to supply a small amount of electric power. On the other hand, when the vulcanization start process is transferred to the tire vulcanizer 5B,
The variable resistor 15B is adjusted to supply high power. In this way, high frequency power is supplied to each vulcanizer 5 through the controller 14, but depending on the vulcanizing process of the vulcanizer, the variable resistor 1
5 automatically adjusts the power supply and operates.

Next, specific examples of the present invention will be described.

(1) If a variable load type high frequency power generation device is provided for each vulcanizer, a device with a maximum output of 59 KW will be required. In this case, the output is 50 KW at the start of vulcanization, and the output is 4 to 4.5 KW during vulcanization. Therefore, the equipment is 50
A KW output device is required.

(2) On the other hand, if one large-output high-frequency generator and one small-output high-frequency generator are installed for 12 vulcanizers, the large-output device has an output of 50 kW and the small-output device has an output of 4.5 kW.
KW + 12 units = 54Kw output equipment should be installed.

(3) Also, when installing one high-frequency generator for 12 vulcanizers, use a device with an output of 104KW and adjust the output from a maximum of 50KW to a minimum of 4KW for each vulcanizer. good.

〔Effect of the invention〕

The present invention provides a tire vulcanizer that uses induction heating for mold heating, in which two high-frequency power generators are provided for a plurality of tire vulcanizers, and one of the two high-frequency power generators is
By having the function of selecting the tire vulcanizer with the maximum load, the stand has the following effects.

The number of high-frequency generators is significantly reduced by two units, one 50KW and one 54KW, compared to the conventional technology which installed 12 50KW units.

Furthermore, by dividing the high frequency generator into one for high output and one for small output, the high frequency generator for high output is 1QKHz and the one for low output is 2KHz, so that the heating characteristics can be used differently to uniformly heat the mold. be able to.

[Brief explanation of drawings]

Figure 1 is a diagram of the equipment configuration system in an embodiment of the induction heating tire vulcanization system of the present invention, Figure 2 is a diagram of the equipment configuration system showing another embodiment, and Figure 3 is a diagram of the induction heating device of a conventional tire vulcanizer. 4 is a diagram showing an example of induction heating control of a tire vulcanizer mold, and FIG. 5 is a diagram showing an example of induction heating control different from FIG. 4. 5 (A-L) Tire vulcanizer 6 High power controller 7 Low power controller 8 High power high frequency generator 9 Low power high frequency generator

Claims (1)

[Claims] In a tire vulcanizer that uses induction heating for mold heating, two high-frequency power generators are provided for multiple tire vulcanizers, and one of the two high-frequency power generators has the maximum load. An induction heating tire vulcanizing system characterized by having a tire vulcanizing machine selection switching function.