JP4585361B2 - Tire vulcanization mold cleaning equipment - Google Patents

Description

The present invention relates to a tire vulcanization mold cleaning apparatus , and more particularly to a tire vulcanization mold cleaning apparatus capable of shortening the cleaning time and generating plasma efficiently.

  Conventionally, as a tire vulcanization mold cleaning apparatus, for example, as shown in FIG. 6, a high-frequency power source 3 (high-frequency oscillator) and auto-tuning are provided on an electrode table 2 in a cleaning treatment tank 1 connected to a decompression means. A plate-like electrode 5 (power electrode) connected via the device 4 is arranged in a vertical direction, and a sector mold W and a plate are arranged in a part of the cleaning treatment tank 1 so as to face the plate-like electrode 5. While supplying the reaction gas Q from above the plate electrode 5 between the plate electrode 5 and generating the plasma Z while injecting the reaction gas Q between the mold dirt surface Wx and the plate electrode 5, The soil of the sector mold W is removed by a chemical reaction between the plasma discharge and the reaction gas Q (see, for example, Patent Document 1).

  The auto-tuning device 4 eliminates the reflected wave S of the high-frequency power by taking impedance matching between the output of the high-frequency power source 3 and the plasma load, and efficiently outputs the output wave Sa of the traveling wave power to the load side. It is a device for electric transmission.

  By the way, as a structure of the plate-like electrode 5 (electrode parallel to the mold dirty surface Wx: shower electrode) provided for generating the plasma Z, for example, as shown in FIG. A reaction gas Q diffusion plate 8 provided with a plurality of holes 7 on both sides thereof and a partition plate 10 provided with injection holes 9 are disposed, and the reaction gas Q is injected into the holes 7 of the diffusion plate 8 and the partition plate 10. The air is sprayed through the holes 9 to the dirt surface Wx side of the sector mold W, and plasma Z is generated between the dirt surface Wx and the plate-like electrode 5 to remove the dirt of the sector mold W.

  However, the plasma Z becomes unstable due to the abnormal discharge of the injection hole 9 of the reaction gas Q of the shower electrode provided to generate the plasma Z, the reflected wave S becomes large, and the high-frequency power source 3 (high-frequency oscillator) fails. Problem has occurred.

In pursuit of the cause of this abnormal discharge, it has been found that a discharge is generated due to a potential difference in the mating surface 10a of the partition plate 10 which is in the structure of the shower electrode and is provided to uniformly inject the reaction gas Q.
JP 2001-293729 A

This invention pays attention to such conventional problems, and can improve the reactive gas injection path and electrode structure to generate stable plasma, shorten cleaning time, and generate plasma efficiently. It is an object of the present invention to provide a tire vulcanization mold cleaning apparatus that can perform the following.

In order to achieve the above object, a tire vulcanization mold cleaning apparatus according to the present invention includes a plate electrode and a soiled surface of a sector mold between at least one side surface of a cleaning tank and an electrode. The gist is that an injection hole for injecting the reaction gas is provided in parallel with the table, and the plate-like electrode is formed in an aluminum integrated structure so that the surface not facing the sector mold is covered with an insulator. .

Here, the said injection hole can also be provided in the side surface of the washing | cleaning processing tank of the vertical direction center of a plate-shaped electrode .

Since the present invention is configured as described above, the following excellent effects can be obtained. (A). By integrating the electrodes, there is no potential difference in the electrodes, so that discharge can be prevented and the output can be increased, so that the cleaning process time can be shortened.
(B). In addition, since the output can be increased, strong plasma can enter the cast joint even if the shower method is not used, and ashing can be promoted to shorten the processing time.
(C). By applying an insulator around the plate electrode, plasma can be efficiently generated on the dirty surface side of the sector mold.
(D). Since the shower electrode can be integrated, the electrode can be simplified and the cost can be reduced.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that the same components as those in the conventional example are denoted by the same reference numerals and description thereof is omitted.

FIG. 1 is a schematic side view of a tire vulcanization mold cleaning apparatus according to a first embodiment of the present invention, FIG. 2 is a schematic front view of FIG. 1, and 1 is a sealed box shape having an open / close door 1b. , 5 is a plate electrode suspended vertically from the upper wall of the cleaning tank, 3 is a high frequency power source (high frequency oscillator), 12 is an exhaust hole formed in the bottom wall of the cleaning tank 1, 13 Indicates a pressure reducing means such as a vacuum pump, 14 indicates a ground electrode, 15 indicates a ground, and a sector mold W for cleaning is installed at a position facing the plate electrode 5.

  In the first embodiment of the present invention, the reaction gas Q is supplied between the plate electrode 5 and the dirty surface Wx of the sector mold W and in parallel with the electrode table 2 at two locations on the side surface 1 a of the cleaning treatment tank 1. Injection holes 16 a and 16 b having a diameter of about 6 mm are formed, and the positions of the injection holes 16 a and 16 b are provided on the side surface 1 a of the cleaning treatment tank 1 at the center in the longitudinal direction of the plate electrode 5.

  The inside of the cleaning treatment tank 1 is set to be maintained in a reduced pressure atmosphere of 60 to 90 Pa by the pressure reducing means 13, and the reaction gas Q uses a mixture of oxygen and carbon tetrafluoride and has an injection pressure of 0. It is configured to inject into the cleaning treatment tank 1 at a flow rate of 400 SCCM and 100 SCCM at 15 MPa.

  Further, the plate-like electrode 5 is constructed in an aluminum integrated structure as shown in FIG. 5 and is constructed so as to cover the surface not facing the sector mold W with an insulator 17. That is, in the present invention, the electrode for high-pressure application and the injection of the reaction gas Q are separated, and the injection path of the reaction gas Q is changed to simplify the electrode to be an integrated structure, and further, a potential difference occurs in the electrode. By preventing the discharge, the discharge can be prevented and the output can be increased.

  In this invention, what was conventionally 2 KW-120 minutes could be shortened to 3 KW / 80 minutes, and the cleaning efficiency could be improved.

  3 and 4 show a schematic front view and a plan view of the cleaning apparatus according to the second embodiment of the present invention, and this embodiment is arranged at one place on the side surface 1a of the cleaning treatment tank 1 described above. The same injection hole 16c as in the first embodiment is formed.

  Since other configurations and operations are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted.

  Embodiments 1 and 2 of the present invention are configured as described above so that the dirt surface Wx of the sector mold W is disposed on the electrode table 2 in the cleaning treatment tank 1 so as to face the plate electrode 5. In a state where the inside of the cleaning treatment tank 1 is in a reduced-pressure atmosphere, plasma is generated while injecting the reaction gas Q between the mold dirt surface Wx and the plate-like electrode 5, and the chemistry of the plasma discharge and the reaction gas is performed. When cleaning the dirty surface Wx of the sector mold W by reaction, the reactive gas Q is injected from the injection holes 16a, 16b, 16c provided in the side surface 1a of the cleaning processing tank 1 to the plate electrode 5 and the dirty surface Wx of the sector mold W. And sprayed in parallel with the electrode table 2.

  Thus, by making the plate-like electrode 5 an integral structure, there is no potential difference in the electrode, so that discharge can be prevented and the output can be increased, so that the cleaning processing time can be shortened. Since the output can be increased, strong plasma can enter the cast joint even if the shower method is not used, and ashing can be promoted to shorten the processing time.

  Furthermore, by attaching an insulator 17 around the plate-like electrode 5, plasma can be efficiently generated on the dirty surface side of the sector mold W, and the shower electrode can be made into an integral structure. It can be simplified and the cost can be reduced.

It is a schematic side view of a tire vulcanization mold cleaning apparatus according to the first embodiment of the present invention. It is a schematic front view of FIG. It is a schematic front view of the washing | cleaning apparatus in 2nd Embodiment of this invention. FIG. 4 is a plan view of FIG. 3. It is a partially expanded explanatory view of a plate electrode. It is a schematic block diagram of the washing | cleaning apparatus of the conventional mold for tire vulcanization molding. It is explanatory drawing of the conventional shower electrode.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cleaning process tank 1a Side surface 1b Opening and closing door 2 Electrode table 3 High frequency power supply 4 Auto-tuning device 5 Plate electrode (power electrode)
Q reaction gas Z plasma S reflected wave Sa output wave 7 hole 8 diffuser plate 9 injection hole 10 partition plate 10a mating surface 12 exhaust hole 13 pressure reducing means 14 ground electrode 15 ground
16a, 16b, 16c Injection hole 17 Insulator W Sector mold Wx Dirt surface

Claims (2)

A plate-like electrode connected to a high-frequency power source is arranged vertically on an electrode table in a washing treatment tank to which a decompression means is connected, and is arranged in a part of the washing treatment tank so as to face the plate-like electrode. In the tire vulcanization mold cleaning apparatus provided with injection holes for injecting reaction gas between the sector mold and the plate electrode,
At least one place on the side surface of the cleaning treatment tank is provided with an injection hole for injecting a reaction gas between the plate electrode and the dirty surface of the sector mold and in parallel with the electrode table, and the plate electrode, A cleaning apparatus for a tire vulcanization mold, which is constructed of an aluminum integrated structure and is configured to cover a surface not facing a sector mold with an insulator . The injection hole of the tire mold for vulcanization molding of the cleaning apparatus according to claim 1 provided on the side of the longitudinal center of the cleaning tank plate electrodes.

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