JPS6337109Y2 - - 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, when cleaning the surface of a resin product formed from a synthetic resin material such as a urethane bumper for an automobile, an alkaline cleaning method has been 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 the equipment cost, 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 57 consisting of a jacket-type tank 56 is arranged near the cleaning tank 51, and above the collection tank 57, one end is connected to the bottom 51a of the cleaning tank 51.
The other end of a collection box 58 connected nearby is provided. 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 of the conveyors 64. 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, the fine dust cannot be sufficiently removed, and the fine dust may be removed from the surface of the resin product W when the cleaning liquid H is sprayed. There is a problem with it adhering to the surface.

Therefore, the technical problem of this invention is that when cleaning a resin product made from a synthetic resin material, by spraying a distilled cleaning liquid onto the surface of the resin product, it is possible to remove the resin while spraying the cleaning liquid. It is designed 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, a distiller is installed near the cleaning tank to distill the cleaning liquid made of a chlorinated organic solvent sent from the cleaning tank, and the cleaning liquid that has been distilled into a liquid state is located near the distiller. A storage tank is provided to accommodate the. Furthermore, a pump is interposed and connected between the storage tank and the jet pipe disposed in the washing tank to forcefully feed the distilled cleaning liquid in the storage tank to the jet pipe. It is.

[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 provided heater is activated to heat and evaporate the cleaning liquid, forming a cleaning zone with steam mist below the cooling zone. At the same time, the distiller is operated and the cleaning liquid distilled in the storage tank is pumped and supplied to the jetting pipe, 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 distilled 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 distilled and sprayed onto the surface of the resin product in a purified 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 resin product cleaning apparatus according to the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 shows a schematic 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. In addition, a valve 5 is provided in the middle of the pipe 4 to control the amount of heating medium such as steam or hot air supplied to the pipe 4.

In addition, a distillation tank 6 and a heater 7 are located near the cleaning tank 1.
A distiller 8 consisting of the following is installed and is configured as follows. That is, the distillation tank 6 is formed into a conical shape, with a flat bottom 6a and an inverted U-shaped small diameter tube 6b at the top. A part of the small diameter tube 6b passes through a cooling water tank 9, so that the inside of the small diameter tube 6b is cooled. Further, the other end of a first supply pipe 10, one end of which is connected to the bottom 1a of the cleaning tank 1, is inserted through approximately the center of the distillation tank 6, and a valve 11 is provided in the middle of the first supply pipe 10. A part of the cleaning liquid Ha contained in the container 1 is supplied. Further, a pipe 12 supported by the distillation tank 6 is disposed at the bottom 6a of the distillation tank 6, and a valve 13 is provided in the middle of the pipe 12. Thereby, a heating medium such as steam or hot air is supplied to the pipe 12, and the cleaning liquid Ha is heated by the heating medium to generate a steam mist.

Further, a storage tank 14 is disposed at the tip of the small diameter pipe 6b of the distillation tank 6, and this storage tank 14 is constituted by a jacket type tank 15, and the cooling water supplied to the jacket part Temperature is regulated. In addition, a second supply pipe 16 is provided near the distiller 8.
is disposed, one end of which is connected to the bottom of the storage tank 14, and the other end connected to the ejection pipe 3 disposed within the cleaning tank 1. Then, the steam mist of the cleaning liquid Ha evaporated in the distiller 8 is transferred to the cooling water tank 9.
The cleaning liquid Hb is cooled and becomes liquid in the storage tank 14. Further, a pump 17 and a valve 18 are sequentially provided in the middle of the second supply pipe 16.
The distilled cleaning liquid in the reservoir 14 is removed by the operation of
Hb is supplied to the jet pipe 3, and a large number of jet ports 3a
It is starting to erupt from the air.

Further, a conveyor 19 is installed above the cleaning tank 1 in the longitudinal direction, and is sloped sequentially downward 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 tilted upward in sequence. And this conveyor 1
Reference numeral 9 denotes hanging supports 20 for supporting the resin product W formed from a synthetic resin material and carrying it into the cleaning area B in the cleaning tank 1, and a plurality of supports 20 are provided at appropriate intervals. It is being 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, thereby forming a cleaning area B by steam mist below the cooling area A.
At the same time, a heating medium such as steam or hot air is passed through the pipe 12 of the distiller 8 to heat the cleaning liquid Ha.
While cooling the steam mist in the cooling water tank 9, the distilled cleaning liquid Hb is stored in the storage tank 14, and the pump 17 is operated to supply the distilled cleaning liquid Hb in the storage tank 14 to the ejection pipe 3. The water is ejected into the cleaning area B from a large number of air outlets 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 distilled 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.

In addition, 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 distilled in the distiller 8. and stored in the storage tank 14. The cleaning liquid Ha collected at the bottom 1a of the cleaning tank 1 is heated and evaporated again by the heating medium to form a cleaning area B consisting of steam mist, and the distilled cleaning liquid Hb in the storage tank 14 is transferred to the jet pipe. 3 and is sprayed toward the resin product W supported by the support 20 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 products are cleaned using a heated 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 distilled 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, 8 ... distiller, 14
...Storage tank, 16...Second supply pipe, A...Cooling area, B...Cleaning area, C...Cleaning liquid area, Ha...Cleaning liquid, Hb...Distilled cleaning liquid.

Claims (1)

[Scope of utility model registration request] A cooling pipe is installed around the inside and upper part of the cleaning tank to form a cooling area, and a blowout pipe with a large number of outlets is installed below this cooling area to form a cleaning area. A cleaning solution consisting of a chlorinated organic solvent is stored at the bottom, and a heater is installed in this cleaning solution to form a cleaning solution area. A distillation vessel for distilling a cleaning liquid consisting of a solvent is provided, and a storage tank for storing the distilled cleaning liquid in the vicinity of the distillation vessel is provided. A cleaning device for resin products, characterized in that a pump is connected between the storage tank and the cleaning tank to forcefully feed the cleaning liquid in the cleaning tank to a jet pipe in the cleaning tank.