JPH0239593Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a cleaning device suitable for cleaning the surface of resin products molded from synthetic resin materials using a cleaning liquid made of a chlorinated organic solvent. It is something.

[Conventional technology]

Conventionally, for example, when cleaning the surface of a resin product made of synthetic resin material such as a urethane bumper for an automobile, an alkaline cleaning method is used in which an alkaline degreasing liquid is sprayed onto the surface of the resin product to degrease and clean it. A steam cleaning method is widely used in which a steam mist is condensed on the surface of a resin product to degrease and clean it using a chlorinated organic solvent such as trichloroethane.

However, in the former alkaline cleaning method,
After degreasing and cleaning resin products, equipment for rinsing, drying, etc. is required, which not only increases equipment costs, but also complicates composition management of the alkaline degreasing solution. On the other hand, the latter steam cleaning method is more advantageous than the former alkaline cleaning method in terms of equipment cost and composition control. It has the disadvantage that it cannot completely remove solids such as.

As a means to solve the above problem, the inventor has proposed a cleaning device that sprays a chlorinated organic solvent as shown in FIG.

In FIG. 2, reference numeral 51 is a cleaning tank formed in a box shape with an open top, and a cooling pipe 52 that uses water, cold air, etc. as a cooling medium is installed around the inside and upper part of this cleaning tank 51. A plurality of riser pipes 53 each having a plurality of air outlets 53a are disposed at intervals below the cooling area A, and a cleaning area B is formed under the cooling area A. It is formed. Further, a cleaning liquid H made of a chlorinated organic solvent such as trichloroethane is stored in the bottom 51a of the cleaning tank 51, and a heating pipe 54 using steam, hot air, etc. as a heating medium is contained in the cleaning liquid H. A valve 55 is provided in the middle. This forms a cleaning liquid area C.

Further, a recovery tank equipped with a jacket-type cooling member 56 is arranged near the cleaning tank 51, and above it is a recovery pipe whose one end is connected to the vicinity of the bottom 51a of the cleaning tank 51. 58 is disposed at the other end. A valve 59 is provided in the middle of this recovery pipe 58 to control the amount of cleaning liquid H recovered into the recovery tank 57.

Further, one end of a supply pipe 60 is connected to the vicinity of the bottom of the recovery tank 57, and the other end is connected to a plurality of riser pipes 53 arranged in the cleaning tank 51. In the middle of this supply pipe 60, a filter 61 and a pump 62 are installed in order from the recovery tank 57 side.
and a valve 63 are provided. Further, a conveyor 64 is disposed in the longitudinal direction of the cleaning tank 51, and a plurality of article supports 65 are suspended in the middle of the conveyor 64, and resin products W are supported at the tips thereof. ing.

When cleaning the resin product W, a cooling medium such as water or cold air is passed through the cooling pipe 52 to form a cooling area A, and a heating medium such as steam or hot air is passed through the pipe 54 to form a cleaning liquid. H is evaporated to form a steam mist cleaning zone B. At the same time, the pump 62 is operated, and the cleaning liquid H contained in the recovery tank 57 is passed through the supply pipe 60 to remove the plurality of riser pipes 53 in the cleaning tank 51.
supply to. At this time, when the cleaning liquid H passes through a filter 61 provided in the middle of the supply pipe 60, solids such as dust are removed and the cleaning liquid H is supplied to the riser pipe 53.

After that, the conveyor 64 is operated to remove the cleaning tank 51.
The resin product W is carried into the cleaning area B inside the cleaning area. At this time,
The cleaning liquid H supplied to the plurality of riser pipes 53 is sprayed toward the resin product W from the outlet 53a. At this time, wax content such as mold release agent during molding that adheres to the surface of the resin product W is removed by the dissolving power of the cleaning liquid H due to dew condensation and the impact force of the spraying, and solid content such as dust is removed. The particles are removed by the impact force of the cleaning liquid H sprayed from the plurality of riser pipes 53.

[Problem that the invention attempts to solve]

However, in such a cleaning device for resin products, when cleaning the resin product W, the cleaning is performed using the impact force caused by spraying the cleaning liquid H and the dissolving power due to the condensation of the vapor mist of the cleaning liquid H. Although the wax content such as mold release agent and solid content such as dust adhering to the surface of the resin product W can be effectively removed in the recovery tank 57.
Since the solid content contained in the cleaning liquid H is removed by the filter 61, fine dust cannot be sufficiently removed, and when the cleaning liquid H is sprayed, the fine dust may not be on the surface of the resin product W. There is a problem with adhesion.

Therefore, the technical problem of this invention is that when cleaning a resin product made from a synthetic resin material, by spraying a filtered cleaning liquid onto the surface of the resin product, the resin is removed when the cleaning liquid is sprayed. The purpose is to completely remove dust, etc., without allowing fine dust to adhere to the surface of the product.

[Means for solving problems]

That is, in the cleaning apparatus for resin products according to this invention, a cooling pipe for a cooling medium such as water or cold air is provided around the inside and upper part of the cleaning tank to form a cooling area. Furthermore, a jet pipe having a large number of blow-off ports is disposed below this cooling region, and forms a cleaning region. Furthermore, a cleaning solution made of a chlorinated organic solvent such as trichlorethane or trichlorethylene is stored at the bottom of the cleaning tank, and a heater, which heats the solution using steam, etc., is installed in this cleaning solution. A cleaning liquid area is provided.

In addition, an ultrafilter is installed near the cleaning tank to filter the cleaning liquid made of chlorinated organic solvents such as trichlorethane and trichlorethylene stored at the bottom of the cleaning tank. A storage tank is provided to contain the filtered cleaning liquid. Furthermore, a supply pipe is installed near the storage tank, one end of which is connected to a spout pipe installed in the cleaning tank, and the other end connected to the storage tank. .

[Effect]

In such a cleaning device for resin products, when cleaning resin products, a cooling medium such as water or cold air is passed through the cooling pipe to form a cooling area above the cleaning tank, and a cooling area is formed at the bottom of the cleaning tank. The installed heater is activated to heat and evaporate the cleaning liquid, forming a cleaning liquid in the form of steam mist below the cooling zone. At the same time, the ultrafilter is operated to store the filtered cleaning liquid in the storage tank, and the stored cleaning liquid is supplied to the jetting pipe and jetted out from the multiple jetting ports.

Thereafter, the resin product to be cleaned is carried into the cleaning area of the cleaning tank. At this time, the filtered cleaning liquid is sprayed from the outlet of the jet pipe toward the resin product, and the vapor mist of the cleaning liquid heated and evaporated by the heater condenses on the surface of the resin product. Then, the wax content such as mold release agent adhering to the surface of the resin product is removed by the dissolving power of the sprayed cleaning liquid and the dew condensed cleaning liquid, and the solid content such as dust is removed by the cleaning liquid sprayed from the jet pipe. removed by the impact force of

As a result, the cleaning liquid is filtered and sprayed onto the surface of the resin product in a cleaned state free of fine dust, so that there is no adhesion of dust or the like due to the sprayed cleaning liquid.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a cleaning apparatus for resin products according to the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 shows a schematic cross-sectional view of a cleaning apparatus for resin products according to the present invention.

In FIG. 1, reference numeral 1 denotes a box-shaped cleaning tank made of a metal material. Only the top of the cleaning tank 1 is open, and the bottom 1a is flat. A plurality of cooling pipes 2 using water, cold air, etc. as a cooling medium are installed at intervals above the cleaning tank 1, and a cooling area A is formed inside and above the cleaning tank 1. ing.

Further, below the cooling area A of the cleaning tank 1, a blowout pipe 3 in which a large number of blowing ports 3a are formed is disposed, and a cleaning area B is formed approximately at the center of the cleaning tank 1. Further, a cleaning liquid Ha made of a chlorinated organic solvent such as trichloroethane or trichlorethylene is stored in the bottom 1a of the cleaning tank 1, and a pipe 4 supported in the cleaning tank 1 is contained in the cleaning liquid Ha. It is arranged. A heating medium such as steam or hot air is supplied to this pipe 4, and the cleaning liquid Ha is heated by the heating medium to generate a steam mist. Furthermore, pipe 4
A valve 5 is provided in the middle of the pipe 4.
The amount of heating media such as steam and hot air supplied to the system is controlled.

Further, a recovery tank 6 is arranged near the cleaning tank 1, and a jacket type cooling member 6a is provided around it, and cooling water is supplied to the jacket part to adjust the temperature. I'm starting to be able to do it. One end of the first supply pipe 7a is connected to the bottom 1a of the cleaning tank 1, and the other end of the first supply pipe 7a is connected to the recovery tank 6.
A filter 8 for removing dust contained therein and a pump 9 for supplying part of the cleaning liquid Ha contained in the cleaning tank 1 to the recovery tank 1 are provided. Further, a first bypass pipe 7b whose one end is connected to the inside of the cleaning tank 1 is connected to the upper part of the recovery tank 6, and the other end of the first bypass pipe 7b is connected to the top of the recovery tank 6 so as to return an excess amount of the cleaning liquid Ha supplied to the recovery tank 1. It's summery.

Further, an ultrafilter 10 is disposed near the recovery tank 6, and the inlet side of the ultrafilter 10 is connected to a second supply pipe 11 whose one end is connected to the recovery tank 6. A pump 12 is provided for supplying a cleaning liquid Ha to the ultrafilter 10. In this ultrafilter 10, a large number of pipes (not shown) made of polysulfone filtration membranes are arranged in the longitudinal direction, and the pore diameter of the filtration membranes is 0.005 to 0.005.
The molecular weight is set at about 8,000 to 9,000 within a range of 0.01.

In addition, one end of a second bypass pipe 13 is connected to the outlet side of the ultrafilter 10 and the other end of a second bypass pipe 13 is connected to the recovery tank 6. is returned to the collection tank 6. Furthermore, a third filter is provided on the outlet side of the ultrafilter 10.
One end of the supply pipe 14 is connected, and a storage tank 15 is disposed at the tip. Thereby, the cleaning liquid Hb that has passed through the filtration membrane of the ultrafilter 10 is collected into the storage tank 15.

Further, a fourth supply pipe 16 is arranged near the storage tank 15, one end of which is connected to the storage tank 15, and the other end connected to a jet pipe 3 disposed inside the cleaning tank 1.
It is connected to the. A pump 17 and a valve 18 are sequentially provided in the middle of the fourth supply pipe 16, and when the pump 17 operates, the filtered cleaning liquid Hb in the storage tank 15 is supplied to the jet pipe 3, and a large number of jet ports are provided. It is designed to be ejected from 3a.

Further, a conveyor 19 is installed above the cleaning tank 1 in the longitudinal direction, and is inclined downward sequentially from the loading side of the cleaning tank 1, is horizontal above the cleaning tank 1, and is horizontal on the loading side of the cleaning tank 1. They are arranged so as to be slanted upward in sequence. This conveyor 19 has hanging supports 20 for supporting the resin products W made of synthetic resin material and carrying them into the cleaning area B in the cleaning tank 1, and is spaced at appropriate intervals. There are several. As a result, the resin product W is transferred into and out of the cleaning tank 1 by the conveyor 19 moving in the direction of arrow D.

A method for cleaning the surface of the resin product W in the resin product cleaning apparatus configured as described above will be described.

First, a cooling medium such as water or cold air is passed through the cooling pipe 2 to form a cooling area A above the cleaning tank 1, and a cooling medium such as steam or hot air is passed through the pipe 4 disposed at the bottom 1a of the cleaning tank 1. The cleaning liquid Ha is heated and vaporized by passing through a heating medium, and a cleaning liquid B is formed as a steam mist below the cooling area A.
At the same time, the pump 9 is activated to supply the cleaning liquid Ha in the cleaning tank 1 to the recovery tank 6, and the pump 12 is activated to cause the cleaning liquid Ha in the recovery tank 6 to pass through the ultrafilter 10. At this time, relatively large dust contained in the cleaning liquid Ha is removed by the filter 8, and fine dust and the wax component of the mold release agent are removed by the filtration membrane of the ultrafilter 10. Then, the filtered cleaning liquid Hb is stored in a storage tank 15.
At the same time, the pump 17 is operated to supply the filtered cleaning liquid Hb in the storage tank 15 to the jetting pipe 3 and jetting it into the cleaning area B from the multiple jetting ports 3a.

Thereafter, the conveyor 19 is operated in the direction of arrow D to move the resin product W supported by the support 20 into the cleaning tank 1.
be carried into the cleaning area B inside. At that time, the filtered cleaning liquid Hb is sprayed from the outlet 3a of the outlet pipe 3 toward the resin product W, and the cleaning tank 1
Steam mist evaporated from the bottom 1a of the resin product W condenses on the surface of the resin product W.

Then, the wax content such as the mold release agent adhering to the surface of the resin product W is removed by the dissolving power of the sprayed cleaning liquid Hb and the dew condensed cleaning liquid Ha, and the solid content such as dust is removed from the jet pipe 3. It is removed by the impact force of the cleaning liquid Hb sprayed from.

Further, the cleaning liquid Hb sprayed toward the resin product W and the cleaning liquid Ha condensed on the resin product W fall to the bottom 1a of the cleaning tank 1 and are collected, and some of the cleaning liquid Ha is passed through the ultrafilter 10. It is filtered and stored in the storage tank 14. And cleaning tank 1
The cleaning liquid Ha collected at the bottom 1a is heated and evaporated again by the heating medium to form a cleaning area B consisting of steam mist, and the filtered cleaning liquid Hb from the storage tank 14 is supplied to the jet pipe 3. The resin product W supported by the support 20 is sprayed in the same manner as described above.

Further, the resin product W, which has been washed for a predetermined period of time, is pulled up from the washing tank 1 while being supported by the support 20 and being transferred in the direction of arrow D within the washing tank 1 . At that time, the resin product W is heated with a steam mist cleaning solution.
Since the cleaning liquids Ha and Hb are heated by Ha, the cleaning liquids Ha and Hb are completely evaporated before being pulled out of the cleaning tank 1. Then, the resin product W from which the cleaning liquids Ha and Hb have been evaporated is transferred to the next process by the conveyor 19.

[Effect of idea]

As explained above, in the cleaning apparatus for resin products according to the present invention, when cleaning resin products made of synthetic resin materials, the filtered cleaning liquid is sprayed and the cleaning liquid made of steam mist is dew-condensed. Because I washed it with water,
When spraying the cleaning liquid, it is possible to completely remove wax components such as mold release agents and solid components such as dust without adhering fine dust to the surface of the resin product.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing a cleaning apparatus for resin products according to the present invention. FIG. 2 is a schematic cross-sectional view showing a conventional cleaning device for resin products. 1...Cleaning tank, 1a...Bottom, 2...Cooling pipe, 3...Ejection pipe, 3a...Blowout port, 4
... Pipe, 5 ... Valve, 10 ... Ultrafilter, 11 ... Second supply pipe, 12 ... Pump, 14
...Third supply pipe, 15...Storage tank, 16...Fourth
Supply pipe, Ha...washing liquid, Hb...filtered washing liquid.

Claims (1)

[Scope of utility model registration request] A cooling pipe through which the cooling medium passes is installed around the inside and upper part of the cleaning tank, and an ejection pipe with a large number of outlets is provided below the cooling pipe, and a chlorinated organic solvent cleaning solution is supplied to the bottom of the cleaning tank. At the same time, a heater is disposed in the cleaning liquid, and an ultrafilter for filtering the cleaning liquid in the cleaning tank is disposed near the cleaning tank, and an ultrafilter is disposed near the ultrafilter. 1. A cleaning device for resin products, characterized in that a storage tank containing filtered cleaning liquid is provided, one end of which is connected to a supply pipe connected to an ejection pipe in the cleaning tank, and the other end of a supply pipe connected to the storage tank.