JPS62102877A - Washing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cleaning method, and more particularly to a cleaning method in which a workpiece is ultrasonically cleaned or immersed in a solvent several times.

(Prior Art) For example, cylindrical machined products (workpieces) whose outer surfaces must not be scratched, dusted, or stained are conventionally cleaned by a chain tact type cleaning device as shown in Fig. 3. was. In Fig. 3, 1 is the entrance conveyor, 2
is the basket containing the workpiece, and each of the three is independent.
Four cleaning tanks are arranged in a row adjacent to each other, 4 is the solvent contained in each cleaning tank 3, 5 is an exit conveyor, 6 is a basket 2 that is lifted from above the entrance conveyor 1, and 4 is a solvent contained in each cleaning tank 3. A chain conveyor lowers the baskets onto an exit conveyor 5 after being immersed in the water, and hangers 7 for hanging the baskets are attached at predetermined intervals. Further, reference numeral 8 indicates a cooling condensation filter arranged in the gas phase portion of each cleaning tank 3 to prevent evaporation of the solvent.

In a cleaning method using such a conventional cleaning device, first, a workpiece is carried into a first cleaning tank, cleaned, and then carried out of the tank. Then, the process of carrying it into a second tank and cleaning it was repeated.

(Problem to be solved by the invention) However, in the conventional cleaning method, a considerable amount of time is spent transporting the workpiece for each calibration, so the actual net cleaning time is shortened. There is a problem in that secondary contamination occurs due to stains due to non-uniform drying in the gas phase and adhesion of floating dust in the gas phase when entering and exiting the tank. In particular, this secondary contamination is not removed even in the subsequent cleaning process, and ultimately remains as a fine cleaning defect.

Furthermore, the conventional washing 7? - Since the conveyance mechanism is located at the top of the cleaning tank in the - system, if the height H of the entire device is constant, the height h of the gas phase section will be lower, so it is necessary to have a sufficient number of condensing coils placed in the gas phase section. There was also the problem that it was not possible.

(Means for Solving the Problems) An object of the present invention is to solve the conventional drawbacks and provide a cleaning method that allows sufficient cleaning time and does not cause secondary contamination.

As a means for achieving such technical problems, the cleaning method of the present invention includes placing a workpiece on a conveyance device in a solvent in a cleaning tank, and driving the conveyance device to move the workpiece in the solvent. It is characterized by performing several stages of ultrasonic cleaning or immersion cleaning.

(Function) In the cleaning method of the present invention, a workpiece to be cleaned is placed on a conveyance device installed in a solvent in a cleaning tank, and while the conveyance device is driven to move the workpiece in the solvent, the workpiece is Perform sonic cleaning or immersion cleaning.

(Example) Hereinafter, the cleaning method of the present invention will be explained in more detail with reference to the cleaning apparatus shown in the accompanying drawings.

FIG. 1 shows a cleaning apparatus 10 for carrying out the cleaning method of the present invention.
is shown schematically.

This cleaning device 10 includes one relatively large cleaning tank 11, and a cleaning solvent 12 is stored inside the cleaning tank 11. Furthermore, a conveying device 14 is installed in the cleaning tank 11 to carry a basket 13 containing a workpiece inside the cleaning tank 11 from one end to the other end. This conveying device 14 transports two endless chains 15a and 15b, which are arranged parallel to each other with an interval, into a cleaning tank 11, respectively.
is supported by a sprocket 16 at each end side,
One sprocket for each endless chain is adapted to be rotated synchronously by suitable drive means. Each of the endless chains 15a, 15b is provided with locking pawls 17 at equal intervals so as to protrude from the upper surface thereof.

Inside each end of the cleaning tank 11, lifting devices 18a and 1 are provided for loading and unloading the basket 13 onto and from the transport device 14.
8b is provided. The lifting device 18a on the left side as viewed in FIG. It is for use. Since these two elevating and lowering devices 18a and 18b are structurally the same, only one of them will be described.

The elevating device 18a includes an elevating table 19a that performs upward and downward movements in the vertical direction by known means.
A roller conveyor 20a is installed above. Also,
When the elevator platform 19a descends into the cleaning tank 11, it is placed between the two parallel endless chains 15a and 15b that constitute the conveying device 14, near the sprocket 16 on the entrance side, that is, on the left side as seen in FIG. It has a width that allows it to fit inside, and it moves up and down in such a position.

Further, small-sized lifting devices 21a and 21b are installed outside each end of the cleaning tank 11, respectively. This lifting device 2
1a and 21b are basically the same as the above-mentioned lifting bag [18a, and are equipped with lifting tables 22a and 22b on which roller conveyors 23a and 23b are installed. Inner and outer lifting devices 18a and 21 on the loading side adjacent to each other across the side wall of the cleaning tank 11
Lifting platform 19a of a.

22a can be raised to the same horizontal plane position higher than the side wall, and at that position, a relay roller conveyor 24a is installed between both elevators 19a and 22a so that the basket 13 can be transferred. The same applies to the internal and external lifting devices 18b and 21b on the unloading side, and both lifting tables 19b are at the highest horizontal plane position of the same lifting table which is higher than the side wall of the cleaning tank 11.

A relay roller conveyor 24b is also installed between the conveyors 22b and 22b so that the basket 13 can be transferred between the conveyors 22b and 22b.

In the internal and external lifting devices 18a and 21a on the carry-in side, the basket 13 is cleaned from the outer lifting device 21a at the highest horizontal plane position of the lifting platform so that the basket 13 can be moved from the lifting platform 22a to the lifting platform 19a as shown by the arrow in FIG. A pusher device 25a is installed on the outer side of the tank. This pusher device 25a supports a push plate at the tip of a piston rod of a hydraulic cylinder device, for example, and moves the push plate horizontally by hydraulic pressure to move the basket 13 on the roller conveyor.
is moved from the lifting platform 22a to the lifting platform 19a. Such a pusher device is also installed on the unloading side,
It is indicated by the reference numeral 25b. On the unloading side, from the lifting platform 19b of the inner lifting device 18b to the outer lifting device 21
In order to move the basket 13 onto the lifting platform 22b at step b, the installation position of the pusher device 25b is at the highest horizontal plane position of the lifting platform as shown in FIG. It is.

In the cleaning device 10 having such a structure, there is no other device (for example, a conventional hanging chain conveyor device) that requires the space above the cleaning tank 11.
If the height H of the entire device is constant, the height of the side wall of the cleaning tank 11 from the solvent liquid level, that is, the height h of the gas phase portion, can be significantly increased, and the entire inner surface of the side wall in this gas phase portion is covered with evaporation of the solvent. A condensing coil 26 is installed for cooling.

Next, the operation of the above-mentioned cleaning device 10 will be explained.

The basket 13 containing a plurality of works is transported from a suitable carry-in line 27a to a lifting platform 22a of an outer lifting device 21a.
and is lifted to the highest position. Then, the pusher device 25a is actuated and pushes the basket 13 from the side to - the three roller conveyors 23a, 24a arranged in 111 rows in a straight line.

20a. Thereby, the basket 13 is transferred onto the lifting platform 19a of the inner lifting device 18a on the carry-in side. Thereafter, the lifting table 19a is lowered, enters the solvent 12, and stops at the lowest position. Lifting platform 1
The lowest position of the roller conveyor 20a means that the two parallel endless tunes 15g and 15b of the conveying device 14 placed in the solvent in the cleaning tank 11 enter the fHJ and the upper surface of the roller conveyor 20a is the endless chain. This is a position that is approximately in the same horizontal plane as the upper surfaces of 15a and 15b. Here, the basket 13f is placed on the roller conveyor 20a of the lifting platform 19a and placed on the upper part of the endless chain 15a, 15b so as to straddle it. Next, when the conveying device 14 is driven, when the locking pawls 17 provided at appropriate positions on the rotating endless chains 15a and 15b go around the sprocket 16 and come into contact with the lower rear end of the basket 13, this causes the basket 13 to is pulled out from the lift table 19a on the roller conveyor 20a, is completely straddled between the endless chains 15a and 15b of the conveying device 14, and is moved to the other end to the delivery side inside the solvent 12 without coming out. At this time, the transport device 1
4 is carried out intermittently, and the Basquera 1-13 on the flying device 14 stops at each cleaning stage 3 to perform ultrasonic cleaning or the like. The cleaning apparatus 10 of the embodiment shown in FIG. 1 has four cleaning action stages.

The basket 13 has been transferred to the unloading end of the transport device [14]
In this case, the lifting platform 19b of the lifting device 18b in the cleaning tank 11 is opposite to the carrying-in side described above, and the lifting platform 19b is opposite to the carrying-in side as described above.
3 as the endless chain 15a.

The basket 13 is lifted from above 15b, and at the highest raised position of the platform, the pusher device 25b moves the basket 13 onto the platform 22b of the outer platform W21b. Then, the lifting table 22b is lowered, and at its lowest position, it is transferred to the carry-out line 27b and sent to the next process.

In the cleaning device 10 described above, the material of the movable parts of the conveyance device in the solvent is engineering plastic (such as nylon resin) rather than metal, since metal powder generated by IgIwA causes contamination of the solvent.

Polybutylene terephthalate resin, etc.) are preferred.

(Effects of the Invention) As described above, according to the present invention, the specified cleaning is carried out by moving through the solvent in one cleaning tank without going outside, so the net cleaning time is short, and There is no secondary contamination, and since the height h of the gas phase can be set very high, a sufficient amount of condensing coils can be placed, so there is less solvent evaporation and it is extremely economical. It produces a measurable effect compared to the equipment.

[Brief explanation of drawings]

FIG. 1 is a structural explanatory diagram schematically showing a cleaning device according to an embodiment of the present invention, and FIG. A cross-sectional view schematically showing the device, and FIG. 3 is a configuration explanatory diagram showing a conventional cleaning device.
Basket, 14/transport device, 18a. 18b, 21a, 2 lb lifting device, 19a,
19b22a, 22b lifting platform, 20a, 2
0 b, 23 a23 b, 24 a, 24 b-
o-rakonheya. Patent applicant Mitsubishi Chemical Industries, Ltd. Cause 1 Figure 2

Claims (1)

[Claims] An object to be cleaned (workpiece) is placed on a conveyance device in a solvent in a cleaning tank, and the conveyance device is driven to move the workpiece in the solvent while carrying out several stages of ultrasonic cleaning or immersion cleaning. A cleaning method characterized by: