JPH0767701B2 - Water cleaning device for molding dies - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning a mold, which has been used for molding a resin such as a tire rubber, resulting in molding resin and other stains, with a cleaning liquid mainly composed of water. is there.

[0002]

2. Description of the Related Art For example, rubber is attached to a mold for molding a tire by heating during vulcanization. Therefore, it is necessary to remove the rubber in a timely manner. Conventionally, such dirt is removed by a sand blast method, a shot blast method or the like, which has the drawback of roughening the die surface. As a method of removing dirt without a method such as sandblasting, it is conceivable to use an organic solvent in which the rubber is soluble. In this case, it is necessary to prevent contamination of rivers and groundwater veins with the organic solvent. In addition, in order to prevent pollution of drainage sewage veins and rivers by organic solvents, wastewater must be detoxified and discharged.
The cost increases and the financial burden increases. The organic solvent may also damage the mold when the mold contains an aluminum alloy or the like. It is well known that seed cleaning operations are avoided due to dirt, danger or difficulty.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to easily and effectively use a cleaning liquid mainly containing water for a mold on which molding resin or other stains are attached. Is to be able to wash.

Another object of the present invention is to provide a water cleaning apparatus suitable for cleaning a mold for molding a tire tread pattern.

[0005]

In order to solve the above-mentioned problems, the present invention relates to a submersible cleaning section 20 in which a mold water cleaning apparatus is arranged along a mold conveyance system path 10, and either of the front and rear parts thereof. One or more aerial cleaning units 5 arranged on one or both sides
0, the underwater cleaning unit 20 is filled with a cleaning liquid mainly composed of water, and a cleaning tank 21 into which the mold can be immersed, and the mold is carried into the cleaning tank 21 and after cleaning, It is composed of a mold moving mechanism 22 for carrying it out from there, and an underwater sprinkle device 23 provided in the cleaning tank 21 for simultaneously injecting a water flow and bubbles to the mold immersed in the cleaning liquid, and in the air. The cleaning unit 50
The means is constituted by an air cleaning chamber 51 surrounding the mold for air cleaning, and an air sprinkle device 53 provided in the air cleaning chamber 52 for injecting a cleaning liquid onto the mold. is there.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below with reference to the drawings. FIG. 1 shows the whole of a cleaning apparatus according to the present invention, and a mold W is conveyed from left to right in the figure. Mold W from the beginning to the end of the device
The route 10 for transporting the
The starting end conveyor 12-1 that carries the mold W into the underwater cleaning unit 20, the intermediate conveyor 12-2 provided in the underwater cleaning unit 20, and the mold W that has left the underwater cleaning unit 20 are conveyed to the next process. The post-stage conveyor 12-3 is arranged.

At the beginning of the transfer system path 10, there is a carry-in section 11 for carrying the mold W into the apparatus of the present invention.
Effectively comprises only the starting end conveyor 12-1. The starting end conveyor 12-1 has a conveyor chain 13, which is wound between the starting end of the carry-in section 11 and sprocket wheels 14 and 14 ′ provided at a position reaching the inside of the underwater cleaning section 20.

The submersible washing section 20 is adjacent to the carry-in section 11, and the intermediate conveyor 12-2 is provided at a position where the mold W is received from the starting end conveyor 12-1. The conveyor chain 17 of the intermediate conveyor 12-2 includes a slide sprocket wheel 1 provided coaxially with respective axes of the rear end sprocket wheel 14 'of the start end conveyor 12-1 and the front end sprocket wheel 16 of the rear conveyor 12-3.
It is hung between 5, 15 '. The underwater cleaning unit 20 is a mold W
Is to be washed by immersing
Therefore, a cleaning tank 21 having a size capable of accommodating the mold W is provided in the lower portion, and a mold moving mechanism 22 for moving the mold W up and down between the transfer system path 10 and the cleaning tank 21 is provided therein. There is.

The mold moving mechanism 22 includes an intermediate conveyor 12-
It is composed of a holder 22a which is locked to and held by the mold W on the upper part 2 and an elevator 22b which carries the holder 22a into the cleaning tank 21 and carries it out from the cleaning tank 21 after cleaning. After the die is held by the holder 22a, the intermediate conveyor chain 17 is opened leftward and rightward in the traveling direction by the slide mechanism 18 to enable the die W to move up and down (see FIG. 3) . The lowered mold W is placed on a rotary support 24 provided on the bottom of the tank, and is rotated around the vertical axis in the liquid by a rotary drive mechanism 25 that drives the support 24.

The underwater cleaning unit 20 is provided with an underwater sprinkle device 23 for underwater cleaning. The device 23 has a structure in which a water flow and air bubbles are simultaneously jetted to a mold W set in the cleaning tank 21. (See FIG. 5). The illustrated underwater sprinkle device 23 has nozzles 27 at the tips of a plurality of radial liquid passage arms 26, respectively, from which a pressurized water flow is injected into the cleaning liquid, and at the same time, innumerable air bubbles are entrained in the injection liquid for injection. be able to. Figure 5 (a)
Although the nozzle 27 shown in FIG. 2 is configured to inject the cleaning liquid or the like in the direction parallel to the rotation axis, the nozzle 27 may be directed in the direction orthogonal to the rotation axis (FIG. 5B). Such a radial nozzle 27 is particularly effective because it can inject a cleaning liquid or the like from the center toward the outside on the mold surface for molding the tire tread.

Reference numeral 28 denotes a rotatable central shaft, which also serves as a flow passage for the cleaning liquid, and a ventilation shaft cylinder 29 is provided coaxially therewith.
It constitutes a rotating shaft of heavy integral. A ventilation arm 30 communicates with the ventilation cylinder 29 and has a ventilation hole 31 for supplying air to the periphery of the nozzle. Reference numeral 32 denotes an injection port that surrounds the nozzle 27 and also communicates with the ventilation port 31, and at the same time when the cleaning liquid is injected, bubbles are caught in the injection port and injected. The illustrated underwater sprinkle device 23 rotates about a central shaft 28 and a ventilation shaft cylinder 29, and its rotation mechanism 33 includes bevel gears 34 and 35 fixed to the shaft cylinder 29 and a drive motor 36. Further, 37 is an air passage opening in the ventilation shaft cylinder 29, 3
Reference numeral 8 denotes a ventilation passage having a ventilation box 38a surrounding the ventilation port 37, and 39 denotes a liquid passage.

A fixed nozzle 4 is provided near the bottom of the submersible washing section 20.
4 are arranged in parallel, and bubbles are blown up from below against the mold W. Reference numeral 45 indicates the air pipe.
Further, the underwater cleaning unit 20 is provided with a device for circulating and using the cleaning liquid used therein, 46 is a circulation tank for that, and 47 is a purification filter installed therein. Reference numeral 48 is a detector for confirming the mold position, and 49 is a blower.

As the aerial cleaning unit 50, a pressure cleaning unit 51 and a rinsing cleaning unit 61 are sequentially provided in the subsequent stage of the underwater cleaning unit 20. Both cleaning units 51 and 61 are independent cleaning chambers 5, respectively.
2 and 62 are provided, both of which are along the transport system path 10, but are not configured to lower the mold W like the underwater cleaning chamber 20. However, in order to raise the mold W from the conveyor chain 19 of the latter-stage conveyor 12-3 to a proper height for cleaning, rotatable elevators 54 and 64 are installed in each chamber. Air sprinkle devices 53 and 63 are installed in each chamber for high-pressure cleaning and rinsing cleaning.

The pressure sprinkle device 53 is for injecting a heated and pressurized water stream into the mold W for finish cleaning.
It is provided on the side wall of the chamber 52, and a vertically moving sprinkle 55 is also provided so as to be suspended from the ceiling. Reference numeral 56 denotes a vertical cylinder mechanism for the sprinkle 55. The sprinkle device 63 for rinsing and washing is for rinsing by spraying a rinsing liquid mixed with a rust preventive material onto the mold W, is provided on the side wall, and has a sprinkle 65 that can be vertically moved in a suspended manner from the ceiling. . Reference numeral 66 denotes the vertical cylinder mechanism. Reference numerals 57 and 67 are drive mechanisms for rotating the elevating tables 54 and 64. Further, 58 and 68 are circulation tanks for circulating and using the rinse liquid as the cleaning liquid, and 59 and 6
Reference numeral 9 denotes a purification filter installed in the same tank, which filters the cleaning liquid and the rinsing liquid for reuse.

At the final stage, a draining / drying section 70 is installed, which has an independent drying chamber 72 on the path of the transport system.
Inside thereof, air blow rotary nozzles 73, 75 for scattering and drying water droplets adhering to the mold W are provided. One rotary nozzle 73 is provided on the side surface, and the other rotary nozzle 75 is provided on the ceiling, and it injects dry air to the mold W that is mounted on a rotatable lift table 74 and raised to a working position. Reference numeral 76 denotes a vertical cylinder mechanism for the ceiling rotary nozzle 75, and 77 denotes a vertical drive mechanism for the vertical platform 74.

The end of the transport path 10 is a terminal portion 81,
The mold W, which has been cleaned by the apparatus of the present invention, is taken out of the drying chamber 72 and put in a carry-out state. Rear conveyor 12-3
The rear sprocket wheel 16 ′ is provided at the end of the terminal end portion 81, and the power of the conveyor drive motor 83 is transmitted to it via the chain 82.

In each drawing, 85 is a pump for washing in water, 86
Is a high-pressure pump for air cleaning, 87 is a rinse cleaning pump, and 88a, 88b, 88c are detectors for confirming the designated position of the mold W, and limit switches are used as in the case of the underwater cleaning unit 20. It is possible. An exhaust duct 89 is provided for the rinsing / cleaning section 61 and the draining / drying section 70.

In the water cleaning apparatus according to the present invention having the above structure, the mold W is cleaned as follows. It is assumed that the tire W, a release agent, and other stains are attached to the mold W in the molding process. First, the mold W is
When it is carried into the carry-in section 11 and moved to the underwater cleaning section 20 by the starting end conveyor 12-1, the intermediate conveyor 12-2 is stopped as the position is detected, and is held by the mold moving mechanism 22. Here, the intermediate conveyor 12-2 is opened, the mold W is carried into the cleaning tank 21 filled with the cleaning liquid, and the cleaning liquid and bubbles are jetted from the underwater sprinkle device 23.

The underwater sprinkle device 23 operates to pressurize and inject a cleaning liquid flow mainly composed of water onto the mold W immersed in the cleaning liquid to remove the dirt adhering to the mold W. However, the underwater sprinkle device 2 according to the present invention
3 sucks air under negative pressure by jetting the cleaning liquid flow, takes in innumerable bubbles in the cleaning liquid flow, and jets the cleaning liquid and the bubbles at the same time to the mold W which is the object to be cleaned. Therefore, the mold W is washed by the water hammer of the cleaning liquid, and is subjected to a shock wave and a minute vibration generated by the rupture of bubbles contained in the flow. Further, since the underwater sprinkle device 23 rotates in the liquid and vigorously agitates the inside of the cleaning tank 21, the mold W is subjected to a high-level cleaning action in which a water hammer and a shock wave are combined. Therefore, it is possible to surely remove the dirt that is hard to peel off, such as the seized rubber firmly attached to the mold W. In addition, the cleaning liquid is heated and pressurized to apply the underwater sprinkle device 23.
Although it is preferable to inject from, it does not necessarily require a special temperature or pressure.

The mold W that has been subjected to the cleaning action by the submersible cleaning unit 20 is lifted by the mold moving mechanism 22 and moved from the intermediate conveyor 12-2 to the subsequent conveyor 12-3 to the pressure cleaning unit of the aerial cleaning unit 50. Proceed to 51. When the position is confirmed by the detection means, after the fixed position is set, the aerial sprinkle device 53 injects the cleaning liquid. The aerial sprinkle device 53 injects a cleaning liquid pressurized to a relatively higher pressure than in the previous step onto the mold W to remove the remaining stains by the water hammer energy and perform a final cleaning. The in-air cleaning may be performed before or after the underwater cleaning.

Next, the mold is carried to the rinse cleaning section 61 which is the aerial cleaning section 50 in the subsequent stage and is subjected to rinse cleaning. Rinse is performed before the same aerial sprinkle a pressurized cleaning unit 51 of the process unit 6 3, it is heated to relatively high temperatures,
In addition, spray a rinse cleaning liquid mixed with a rust preventive agent on the mold to keep it clean. By rinsing and washing in a warm atmosphere, drainage in the next process can be promoted and rusting can be prevented. Therefore, the mold W that has been rinsed and washed
In the draining / drying section 70, it is only necessary to receive an air blow, that is, an injection of a dry air flow.

[0022]

EFFECT OF THE INVENTION Since the present invention is constructed and operates as described above, it is possible to clean the inside of the cleaning tank 21 with respect to an object to be cleaned, such as a die used for rubber molding, to which the resin is firmly adhered. , Water-based cleaning liquid and air bubbles are sprayed to perform underwater cleaning.
Because it is applied, bubbles contained in the cleaning liquid act on the dirt and
To induce cavitation and perform effective cleaning
After that, spray the cleaning liquid in the air and
There is an effect that increase cleaning to Runode, the mold with a very high cleaning capacity without using organic solvents and special cleaning device can be water washed.

In particular, the present invention is a cleaning with water as a main component, which is a cleaning liquid and bubbles. Therefore, the mold is never damaged during cleaning, and the cleaning with water does not require a special solvent or other chemicals. Therefore, there is no concern about environmental damage and there is no problem of waste liquid treatment, so there are many actual benefits such as less capital investment.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a molding die water cleaning apparatus according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a sectional view of a main part of the same.

FIG. 4 is a plan view of the same.

FIG. 5A is a sectional view of a sprinkle device. (B) Sectional drawing of a modification same as the above.

Claims (3)

[Claims] 1. An apparatus for cleaning a mold used for mold molding with stains such as molding resin with water, comprising: an underwater cleaning unit 20 disposed along a mold conveyance system path 10.
1 or 2 placed before or after either one or both
The submersible cleaning unit 2 is equipped with the above-described aerial cleaning unit 50.
Reference numeral 0 denotes a cleaning tank 21 which is filled with a cleaning liquid mainly composed of water, in which a mold can be dipped, and a mold moving mechanism 2 for carrying the mold into the cleaning tank 21 and carrying it out therefrom after cleaning.
2 and an underwater sprinkle device 23 provided in the cleaning tank 21 for simultaneously injecting a water flow and air bubbles to the mold immersed in the cleaning liquid. The aerial cleaning unit 50 cleans the mold in the air. A molding die water cleaning apparatus comprising: an air cleaning chamber 51 surrounded by the above; and an air sprinkle device 53 provided in the air cleaning chamber 52 for injecting a cleaning liquid onto a mold. 2. A start end conveyor 12-1 for loading a mold into the underwater cleaning unit 20 and a slideable back and forth for lowering the mold in the underwater cleaning unit 20 along a transfer system path 10. The intermediate conveyer 12-2 provided in 1 and the latter-stage conveyer 12-3 that conveys the mold carried out from the underwater cleaning unit 20 to the next process are linearly arranged, and the intermediate conveyer 1
The cleaning tank 21 is installed immediately below 2-2.
The water cleaning device for a molding die according to the item. 3. The underwater sprinkle device 23 has a nozzle 27 for injecting a cleaning liquid, and an air outlet 31 for opening air into an injection port 32 surrounding the outside of the nozzle 27 and introducing air therein.
2. The water cleaning device for a molding die according to claim 1, further comprising: a plurality of nozzles 27, wherein all the nozzles 27 are configured to rotate around the central axis in the cleaning liquid.