JPH0796233B2 - 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 is applied to molding of resin such as rubber, and as a result, molding resin and other stains are attached.
The present invention relates to a device for cleaning a mold with a cleaning liquid mainly containing water.

[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 or a shot blast method, but that method has a drawback of roughening the mold surface. As a method for removing dirt without sandblasting, it is conceivable to use an organic solvent in which the rubber is soluble, but in this case, roughening the mold surface or using an organic solvent,
It is necessary to prevent pollution of rivers and groundwater veins with chemicals such as acid and alkaline detergents. In order to prevent pollution of drainage sewage veins and rivers by organic solvents, wastewater must be detoxified and discharged, and the facility and cost for that treatment increase the economic burden.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to make molding resin and other stains adhering to the mold detachable from the mold. The above is to enable effective cleaning with a cleaning liquid mainly composed of water.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a mold water cleaning apparatus with a pretreatment agent such as a neutral detergent and a solvent for separating stains from the mold without roughening the mold. To convey the dirt adhering to the mold to the conveying path 10 of the mold.
And a submersible cleaning unit 30 disposed in the subsequent stage.
Reference numeral 0 has a rotary nozzle means for supplying a pretreatment agent for separating the dirt adhering to the mold from the mold, and the underwater cleaning unit 30 is filled with a cleaning liquid mainly composed of water, in which the metal is filled. A cleaning tank 31 in which a mold can be immersed, a mold moving mechanism 32 for carrying the mold into the cleaning tank 31 and carrying it out after cleaning, and a water flow for the mold immersed in the cleaning liquid. In order to eject the air bubbles at the same time, a means for constituting with the underwater sprinkle device 33 provided in the cleaning tank 31 is taken.

[0005]

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
Is a starting end conveyor 12-1 for loading and generally sending the mold W.
And an intermediate conveyor 12-2 provided in the underwater cleaning unit 30
A post-stage conveyor 12-3 that conveys the mold W that has left the underwater cleaning unit 30 to the next step 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.
A pretreatment unit 20 is provided subsequent to the latter stage. 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 30.

The pretreatment section 20 is provided with a door 21 which is opened and closed to allow the die W on the conveyor to enter, and the die W has a front surface.
It has a spraying chamber 22 which can pass through and can be sealed, and a means 23 for spraying a neutral detergent, a solvent and the like is installed just below the conveyor chain 13. A rotary nozzle is provided as the pretreatment agent spraying means 23, and an air type rotary nozzle 24 is provided below the rotary nozzle for spraying the pretreatment agent with a small number of nozzles without blind spots.
Is provided. The spraying means 23 is a sprayer for spraying the above-mentioned neutral detergent, solvent, etc. evenly over the whole of the mold W to the dirt.
It is supplied from 5. In the figure, reference numeral 26 is a detector for detecting that the mold W has entered a fixed position, stopping the conveyor 13, and performing a spraying work, and 27 is an exhaust duct.

The pretreatment agent to be sprayed is selected based on the fact that it has no toxicity or is extremely low even if it exists, and that it does not require special treatment for disposal. This pretreatment agent has a function of permeating and swelling solid matter such as molding resin adhering to the mold W, and after adhering, it is difficult to remove until it is washed in the next step. good. The components adhering to the mold W include zinc white, carbon, sulfur content,
Synthetic rubber polymers are assumed. As the agent that acts on them to swell and decompose, neutral detergents and, depending on the mold, acidic or alkaline detergents (however, those having a weak PH) can be used.

The submersible washing section 30 is adjacent to the pretreatment section 20, and an intermediate conveyor 12-2 for receiving the mold W that has entered the sealable submerged washing chamber 29 is independently provided. The conveyor chain 17 of the intermediate conveyor 12-2 includes the rear end sprocket wheel 1 of the start end conveyor 12-1.
4 ', the front end sprocket wheel 16 of the rear stage conveyor 12-3 is hung between the slide sprocket wheels 15 and 15' provided coaxially with the respective shafts. Underwater cleaning unit 3
No. 0 is for cleaning the mold W by immersing it in a cleaning liquid containing water as a main component, and therefore has a cleaning tank 31 of a size capable of accommodating the mold W in the lower part, and is the same as the transfer system path 10. Cleaning tank 31
A mold moving mechanism 32 for moving the mold W up and down is provided therein.

The mold moving mechanism 32 includes an intermediate conveyor 12-
It is composed of a holder 32a which is locked to and held by the mold W on the upper part 2 and an elevator 32b for carrying the holder 32a into the cleaning tank 31 and carrying it out after cleaning. After the die is held by the holder 32a, the intermediate conveyor chain 17 is opened back and forth in FIG. 3 by the slide mechanism 18 to enable the die W to move up and down. The lowered mold W is placed on a rotary support 34 provided on the bottom of the tank, and is rotated around the vertical axis in the liquid by a rotary drive mechanism 35 that drives the support 34.

The underwater cleaning unit 30 is provided with an underwater sprinkle device 33 for underwater cleaning, and the device 33 jets a water flow and air bubbles at the same time to the mold W set in the cleaning tank 31. (See FIG. 5). The illustrated underwater sprinkle device 33 has nozzles 37 at the tips of a plurality of radial liquid-passing arms 36, respectively, from which a pressurized water flow is injected into the cleaning liquid, and at the same time, numerous air bubbles are entrained in the injection liquid and ejected. be able to.

Reference numeral 38 denotes a central shaft, which is also a flow passage for the cleaning liquid, and a ventilation shaft cylinder 39 is provided coaxially therewith to form a double rotation shaft. A ventilation arm 40 communicates with the ventilation cylinder 39 and has a ventilation port 41 for supplying air to the periphery of the nozzle. Reference numeral 42 denotes an injection port that surrounds the nozzle 37 and also communicates with the ventilation port 41. At the same time when the cleaning liquid is injected, air bubbles are entrained and injected. Illustrated underwater sprinkle device 3
3 includes a mechanism that rotates around a central shaft 38 and a ventilation shaft cylinder 39, and the rotation mechanism 43 includes bevel gears 44 and 45 fixed to the shaft cylinder 39 and a drive motor 46. Further, 47 is an air passage opening in the ventilation shaft cylinder 39,
Reference numeral 48 denotes a ventilation passage having a ventilation box 48a surrounding the ventilation port 47, and 49 denotes a liquid passage.

An aeration nozzle 5 is provided near the bottom of the submersible cleaning unit 30.
1 can be arranged side by side, and bubbles are blown up from below against the mold W. The submersible cleaning unit 30 is provided with a device for circulating the cleaning liquid used therein, 52 is a circulation tank therefor, and 53 is a purification filter installed therein. 54 is a detector for confirming the mold position, 55 is a blower, and 56 is an air pipe.

An aerial cleaning unit 60 for finishing and rinsing cleaning with a pressurized water flow is provided at the subsequent stage of the underwater cleaning unit 30. The cleaning unit 60 includes an independent cleaning chamber 61, which is located along the transfer system path 10, but does not have a structure for lowering the mold W unlike the underwater cleaning chamber 30. However, since the mold W is slightly lifted from the conveyor chain 19 of the latter-stage conveyor 12-3 for cleaning, a rotatable lifting platform 62 is installed in each chamber. An aerial sprinkle device is installed indoors for high pressure cleaning and rinsing cleaning.

One of the pressure sprinkle devices 64 is provided on the side wall of the cleaning chamber 61 for injecting the heated and pressurized water flow into the mold W for finishing cleaning, and is also suspended from the ceiling. A vertically movable sprinkle device 65 is also installed. Reference numeral 66 denotes a vertical cylinder mechanism of the sprinkle device 65. These sprinkle devices 6
Nos. 4 and 65 can be rinsed by spraying a rinsing liquid mixed with a rust preventive material on the mold W at the time of rinsing and washing.

Reference numeral 67 indicates a vertical cylinder mechanism. Reference numeral 68 is a drive mechanism for rotating the lift table 62. Also, 69
Is a circulation tank for circulating and using the rinse liquid as the cleaning liquid, and has a cleaning filter 69a for filtering the cleaning liquid and the rinse liquid for reuse. This air cleaning unit 6
0 can be arranged immediately before the underwater cleaning unit 30. In that case, the chemicals and the like attached to the mold W in the pretreatment unit 20 are pre-washed together with dirt before washing in water.

At the final stage, a draining / drying section 70 is installed, which is provided with an independent drying chamber 72 on the transport system path.
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 is an up-and-down cylinder mechanism for the ceiling rotary nozzle 75, 77 is an up-and-down drive mechanism for the up-and-down platform 74, 7
An opening / closing door 8 is provided on the rear surface of the drying chamber 72.

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 figure, 85 is a pump for washing in water, 86
Is a high-pressure pump for rinsing in the air, 87a, 87b, 8
Reference numeral 7c is a detector for confirming the designated position of the mold W, and like the detector 26, limit switches can be used.
Reference numeral 88 denotes an exhaust duct, which is provided for the aerial cleaning unit 60 and the draining / drying unit 70 that perform rinsing with a pressurized water flow. Reference numerals 69 and 79 denote lower fixed nozzles for air blow.

In the water cleaning apparatus according to the present invention thus constructed, the mold W is cleaned as follows. First, the mold W is carried into the carry-in section 11, and the starting end conveyor 12-1.
When the position is detected by moving to the pre-processing unit 20 by the starting end conveyor 12-1 is stopped, the spreading chamber 22
The pretreatment agent is sprayed onto the mold W from the nozzle inside. The nozzle, which is a means 23 for spraying the pretreatment agent, blows up the above-mentioned pretreatment agent while rotating, and when it adheres to the dirt of the mold W, it penetrates the dirt without flowing and acts to swell it. . As a result, the dirt becomes bloated,
It becomes easily affected by water flow and bubbles.

Next, when the mold, which has been sprayed with the pretreatment agent, enters the underwater cleaning unit 30 and reaches a fixed position, the intermediate conveyor 12
-2 is stopped and held by the mold moving mechanism 32. 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 injected from the underwater sprinkle device 33.

The underwater sprinkle device 33 operates so as to pressurize and inject a cleaning liquid flow composed mainly of water onto the mold W immersed in the cleaning liquid to remove dirt adhering to the mold W. However, at the same time, negative pressure is sucked by the jet of the cleaning liquid flow, the air is taken into the cleaning liquid flow in the form of innumerable bubbles, and the cleaning liquid and the bubbles are simultaneously jetted to the mold W which is the object to be cleaned. Therefore, the mold W is washed by a water hammer of the cleaning liquid, and the swollen dirt is subjected to a shock wave and a minute vibration generated by the rupture of bubbles contained in the water flow. Further, since the underwater sprinkle device 33 rotates in the liquid and vigorously agitates the inside of the cleaning tank 21, the mold W receives a high cleaning action. At this time, dirt that is hard to peel off, such as seized rubber firmly attached to the mold W, is swollen, and thus can be easily removed by receiving a large acting force. It is preferable that the cleaning liquid is heated and pressurized and then jetted from the underwater sprinkle device 33, but it does not necessarily require a special temperature or pressure.

The mold W which has been subjected to the cleaning action by the submersible cleaning unit 30 is lifted by the mold moving mechanism 32, and is moved from the intermediate conveyor 12-2 to the subsequent conveyor 12-3 to perform the pressure finishing rinse in the air cleaning unit 60. Made in. When the position of the mold W is confirmed by the detection means, after the fixed position setting, the cleaning liquid is sprayed by the aerial sprinkle devices 64 and 65. In the air cleaning unit 60, the sprinkle device 6 is used.
By performing vertical movement while rotating 4, 65,
Cleans evenly the complicated shape of the mold. The cleaning liquid is injected into the mold W with a cleaning liquid pressurized to an ultrahigh pressure of about 150 to 300 kg / cm ² and the water hammer energy causes
The remaining dirt is removed and the final cleaning is performed.

The mold is then rinsed in the same cleaning unit 60. The rinsing cleaning is performed by the air sprinkle devices 64 and 65 which are the same as those in the previous step, and the rinsing cleaning liquid heated to a relatively high temperature and mixed with an anticorrosive agent is sprayed on the mold to keep it free from dirt. To do. 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 need only be subjected to an air blow, that is, a jet of a dry air flow, in the draining and drying section 70.

[0025]

EFFECT OF THE INVENTION Since the present invention is constructed and operates as described above, the pretreatment section 20 is applied to an object to be cleaned to which a resin is firmly adhered, such as a mold used for rubber molding.
In advance, the pretreatment liquid is sprayed in advance so that dirt can be swollen or decomposed, and the dirt is conveyed to the underwater cleaning unit 30. Then, the swollen and enlarged dirt is mainly treated with water in the cleaning tank 31. Since the cleaning liquid and bubbles are sprayed, the bubbles contained in the cleaning liquid act on the swollen dirt to cause cavitation and effective cleaning can be performed, so an organic solvent or a special cleaning device is used. Even if it does not, the mold can be washed with water with a very high cleaning ability.

[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. 5 is a cross-sectional view of the sprinkle device.

Claims (4)

[Claims] 1. A device for cleaning a mold used for mold molding, which has a stain such as a molding resin attached thereto, with water, the pretreatment of a neutral detergent or a solvent for separating the stain without roughening the mold. A pretreatment unit 20 arranged along the mold conveyance system path 10 for permeating the agent into the dirt adhering to the mold.
And an underwater cleaning unit 30 arranged in the subsequent stage, and the pretreatment unit 20 has means for supplying a pretreatment agent for separating the dirt adhering to the mold from the mold. The underwater cleaning unit 30 is filled with a cleaning liquid mainly composed of water, and a cleaning tank 31 into which the mold can be dipped, and a metal for carrying the mold into the cleaning tank 31 and carrying it out after cleaning. Water cleaning for a molding die, comprising a mold moving mechanism 32 and an underwater sprinkle device 33 provided in the cleaning tank 31 for simultaneously injecting a water flow and bubbles to the mold immersed in the cleaning liquid. apparatus. 2. A start end conveyor 12-1 for conveying a mold along a conveying system path 10 and an intermediate conveyor provided so as to be slidable back and forth for lowering the mold in an underwater cleaning portion 30. 12-2 and the latter-stage conveyor 12-3 that conveys the mold carried out from the underwater cleaning unit 30 are linearly arranged, and the cleaning tank 31 is provided immediately below the intermediate conveyor 12-2.
The water cleaning device for a molding die according to claim 1, wherein the water cleaning device is installed. 3. The underwater sprinkle device 33 comprises a nozzle 37 for injecting a cleaning liquid, and a vent hole which is opened in an injection port surrounding the outside of the nozzle 37 and introduces air therein, and the nozzle 37 is The molding die water cleaning apparatus according to claim 1, wherein a plurality of nozzles 37 are provided so as to rotate all the nozzles 37 around the central axis in the cleaning liquid. 4. The molding die according to claim 1, wherein an underwater cleaning unit 30 is arranged at a stage subsequent to the pretreatment unit 20, and an aerial cleaning unit 60 for finishing and rinsing in air is disposed at a stage subsequent thereto. Water cleaning device.