JPS6297799A - Cleaning method for rotary type power compression molding machine - Google Patents

Abstract

PURPOSE:To efficiently clean various elements by storing the element of a molding machine in a bath, and thereafter, executing a driving cleaning after filling it with a cleaning liquid, discharging the cleaning liquid, and blowing dry air. CONSTITUTION:A molding machine being in a state that various molding elements remains installed is stored in a bath 6. After they are stored, a cleaning liquid is filled to a height into which an upper lever is soaked. Subsequently, the driving mechanism 2 of a rotary type powder compression molding machine is operated. As a result, after an automatic cleaning is executed, a stop valve 18 is opened, and a stained cleaning liquid in the bath 6 is discharged to the outside of the bath 6 through a drain pipe 17. Next, by operating a hot air generating device 15 and a stop valve 16, the dry air is blown into the bath 6 through a feed pipe 10. In this way, cleaning can be efficiently executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for cleaning a rotary powder compression molding machine such as a rotary tablet press.

[Conventional technology]

Conventionally, when cleaning a rotary tablet press, etc., the punches and mortars attached to the rotary disk were removed, as well as the various molding elements placed around the rotary disk, and these were manually cleaned one by one. It was common practice to clean the rotary disk using alcoholic water or the like and manually wipe it clean each time.

However, such general conventional methods are very time-consuming and troublesome. By the way, when cleaning manually,
Although it differs depending on the cleaning standards, it generally takes half a day to several days.

Therefore, the present applicant has developed a cleaning method which has already been filed as Japanese Patent Application No. 1988-93088. This cleaning method involves covering the entire circumference of the rotary disk with a plurality of cleaning covers connected to each other, and rotating the rotary disk in a sealed space formed between the inner surface of the cover and the outer surface of the rotary disk. When installing the rotary disk, the rotary disk is cleaned by spraying cleaning liquid toward the hole and punch guide hole. After this spray cleaning, the cleaning liquid in the closed space is drained, and then dry air is blown into the closed space. This is a cleaning method configured to clean a rotary disk.

[Problem that the invention seeks to solve]

However, although the cleaning method according to the above-mentioned application is effective in automatically cleaning the rotary disk, it is necessary to remove the punch and mortar from the rotary disk beforehand, and it is also necessary to remove various molding elements such as the powder feeder and scraper. Not only is there the inconvenience of having to remove the parts, but each removed part must be manually cleaned one by one using conventional methods. There wasn't.

[Means for solving problems]

In the present invention, while the punch and the mortar are attached to the rotary disk,
With the various molding elements still arranged around the rotary disk, the rotary powder compression molding machine is equipped with a bath containing the rotary disk, punches, mortars, and various molding elements. Fill the molding element with cleaning liquid at least up to a height where it touches the upper part of the molding element, and then drive the rotary powder compression molding machine under this liquid bath to clean it. The above-mentioned conventional problems are solved by discharging the cleaning liquid and then blowing dry air into the bathroom.

[Effect]

According to the cleaning method provided with the above solution, the powder contact members such as the rotary disk, punch, mortar, and various molding elements of a rotary powder compression molding machine can be compressed without removing them. Even during molding, the rotary disk is rotated under a bath of cleaning liquid that is filled to at least the height of the upper pestle in the bath where it is stored, and the mold is automatically cleaned by the cleaning liquid.Furthermore, following this liquid bath cleaning, By blowing dry air into the bathroom after the cleaning liquid is discharged, each powder contacting member that has been cleaned in the liquid bath is forcibly dried.

Therefore, without the need for manually disassembling and cleaning the rotary powder compression molding machine one by one, powder contact parts such as the turntable, punch, mortar, and various molding elements of the rotary powder compression molding machine can be automatically removed. It can be washed.

〔Example〕

First, an example of an apparatus system for implementing the method of the present invention will be described with reference to the drawings.

1 in the figure is the body of a rotary powder compression molding machine such as a rotary tablet press, which consists of a lower frame 3 with a built-in drive mechanism 2;
An upper frame 5 is provided on the frame 3 via a plurality of pillars 4, and a bathroom 6 is provided.

The bathroom 6 is partitioned into upper and lower frames 5.3 and a single door 7 which is attached between the upper and lower frames 5.3 so as to be openable and closable by a hinge (not shown). Of course, the door 7 serves to protect the bathroom 6 from dust and prevent powder from scattering outside the bathroom 6, but the door 7 itself is liquid-tight, and when closed, the upper and lower frames 5.3 A liquid-tight gasket 8 made of rubber is attached to the inner surface of the door 7 in close contact with the pillar 4 to keep the bathroom 6 liquid-tight. The closed state of the door 7 is held by a clamp mechanism (not shown), and the gasket 8 is pressed by tightening the clamp mechanism. Further, 7a is a transparent panel provided as necessary.

A water supply pipe 9 and an air supply pipe 10 are respectively attached to, for example, the upper frame 5 of the body 1, with one end facing the bathroom 6. The other end of the water supply pipe 9 that protrudes outside the fuselage 1 is connected to a cleaning liquid tank 12 built in a cleaning unit 11 installed outside the fuselage 1 or inside the lower frame 3 via a pump 13 and an electromagnetic shut-off valve 14. connected. The cleaning liquid tank 12 stores cleaning liquid such as water or a solvent at room temperature or heated if necessary. At the same time, the other end of the air supply pipe 10 protruding outside the body 1 is also connected to a hot air generator 15 built in the cleaning unit 11 via an electromagnetic on-off valve 16. Furthermore, a drain pipe 17 is attached to, for example, the lower frame 3 of the body 1, with one end facing the bathroom 6 and the other end protruding outside the body 1.

An electromagnetic on-off valve 18 is attached to this pipe 17. In the figure, 19 is a cleaning cycle control device provided in the cleaning unit 11, which controls the drive mechanism 2, the pump 13, the hot air generator 15, and the on-off valves 14, 16, .
18 and the like are controlled, and an arbitrary cleaning cycle can be set by a setting operation using this control device 19.

A fixed shaft 20 is provided in the center of the body 1, passing through the lower frame 3, and a drive shaft 21 is provided loosely fitting around the outer periphery of this shaft 20. Note that the upper end of the fixed shaft 20 is fixed to the upper frame 5 via a connecting member 22. The drive shaft 21 is rotatably supported by the upper and lower frames 5.3 via bearings 23.24, and its lower end is connected to the worm gear 2a, which is the output member of the drive mechanism 2.

For example, on the outer periphery of the drive shaft 21 there is a
A split rotary disk 25 is attached.

Several to several dozen dies 26 are attached to this rotary disk 25. Furthermore, an upper punch 27 that is inserted into and removed from the top of the mortar 26 from above, and a lower punch 28 that forms the bottom of the top of the mortar 26 are attached to the rotary disk 25 so as to be vertically movable.

Furthermore, in the bathroom 6, there are various molding elements located around the rotary disk 25, that is, an open powder feeder 29 which is in contact with the upper surface of the F1 attachment of the rotary disk 25, and is fixed to the upper frame 5. An upper punch guide track 30, a lower punch guide track 32 consisting of a lowering track member attached to a track support 31 fixed to the lower frame 3, a weight adjustment track member, a thrusting track member, etc., an upper frame 5, and a lower frame 3. Upper and lower pressure rolls 33 and 34 are rotatably attached to the top, respectively;
The mortar mounting is provided with a scraper (not shown) provided in contact with the upper surface of the part, and a chute (not shown) connected to the scraper and leading the molded product out of the bathroom 6. In addition, the chute can be opened six times at least on the exit side. In addition, 35 in Figure 1 is a support plate fixed to column 4 to support the powder feeder 29, scraper, etc., and 36 is a partition plate fixed to column 4 to prevent the powder from scattering downward. This may be integrated with the support plate 35 or separate from it.

Among the parts housed in the bathroom 6, such as the rotary disk 25 and the molded elements, parts that require waterproofing are provided with liquid-tight measures. In other words, in the above t+% construction, between the lower frame 3 and the rotary disk 25, and between the rotary disk 25
Annular oil seals 37 are provided between the upper punch guide track 30 and the upper punch guide track 30, respectively. Along with this, a pair of rotary disks are formed between the adjustment washer 38 sandwiched between the upper frame 5 and the upper punch guide track 30 and the upper frame 5 and the upper punch guide path 30, and the rotary disk 25. A rubber O-ring 39 is provided between each member. Furthermore, rubber O-rings 40 are also provided at the bearing portions of the pressure rollers 33 and 34, respectively.

Furthermore, each part such as the rotary disk 25 and molded elements housed in the bathroom 6 is made of anti-corrosion material, or has anti-rust measures such as metal plating or resin coating. . In other words, in the above structure, the rotary disk 25,
The mortar 26 and the winter crops 27 and 28 are made of stainless steel which has excellent rust resistance. Along with this, powder feeder 2
9. The entire surface of each guide track 30.32, track support 31, scraper, chute, pressure roller 33.34, support plate 35, partition plate 36, adjustment washer 38, and surrounding parts, etc. At least the surfaces of the upper and lower frames 5.3 and pillars 4 facing the bathroom 6 are also plated.

Furthermore, the joint surfaces between the upper and lower frames 5.3 and the pillars 4 are each filled with caulking material.

A hopper 42 equipped with a raw material powder supply device, such as a shutter 42a, is mounted on the top plate 41 that covers the upper surface of the upper frame 5, and its outlet is connected to the resin tube 4.
3 to the powder supply device 29. Further, when various sensors are provided as necessary for compression molding, each of these sensors is waterproofed or used.

Next, cleaning performed after completion of a predetermined compression molding operation will be explained.

First, prior to cleaning, the removable portion of the chute is removed, a waterproof lid (not shown) is placed over the bathroom penetrating portion, the resin tube 43 is removed if necessary, and the door 7 is closed.

In this state, the mortar 26 and the upper and lower punches 27 and 28 are still attached to the rotary disk 25 as in the case of molding a molded product, and the powder feeder 29 and
Upper punch guide track 30, track support 31, lower punch guide track 32,
With the various molding elements such as the upper and lower pressure rolls 33 and 34 and the scraper still disposed, the bath 6 housing them is filled with cleaning liquid at least up to the height where the upper punch 27 can be touched. In this case, the cleaning liquid is supplied from the cleaning liquid tank 12 to the bathroom 6 through the water supply pipe 9 via the pump 13 and the on-off valve 14 operated by the command from the cleaning cycle control device 19. 25 and most of the molded elements are submerged in the cleaning liquid, and the air in the bathroom 6 escapes to the outside from the part of the upper frame 5 where the pressure roll 33 is attached.

Next, the drive mechanism 2 of the rotary powder compression molding machine is operated under such a liquid bath. Therefore, as the rotary disk 25 rotates, the same operation as during molding is performed, and
Powder contact members such as the rotary disk 25, mortar 26.6, punch 27.28, and various molding elements that are in the cleaning liquid are automatically cleaned by the cleaning liquid, and after this liquid bath cleaning, the cleaning cycle control device 19 The on-off valve 18 opens with the command,
Dirty cleaning liquid in the bathroom 6 is discharged to the outside of the bathroom 6 through a drain pipe 17.

It should be noted that the liquid bath cleaning described above can be carried out only once as long as it takes time, but in the case of this embodiment, in order to further enhance the cleaning effect, the preliminary cleaning is first performed by a command from the cleaning cycle control device 19. Then, after draining water, full-scale liquid bath cleaning is performed, and after draining, the cleaning liquid is accumulated in the bathroom 6 to the above-mentioned height, and the cleaning liquid is rinsed while flowing, or while it is kept in the bath 6. It is designed to perform liquid bath cleaning.

Finally, after the cleaning liquid is discharged following the liquid bath cleaning described above, the hot air generator 15 and the on-off valve 16 are operated in response to a command from the cleaning cycle control device 19, so that dry air is blown into the bathroom 6 through the air supply pipe 10. be included. As a result, various members including the wet bathroom 6 and the rotary disk 25 housed therein are quickly forcedly dried. After this, the drive of the rotary powder compression molding machine is stopped.

With the above steps, the automatic cleaning of the powder contact members such as the rotary disk 25, the mortar 26, 27, 28, various molding elements, and the bathroom 6 is completed at the same time.

Although the above-mentioned embodiment is configured as described above, in order to further enhance the cleaning effect in the present invention, a rotating or non-rotating brush is attached to the partition plate 35 etc. as an auxiliary device, so that the powder adheres particularly strongly. Parts, for example, the top surface of the rotary disk 25 when installed, may be cleaned by scrubbing with the brush during liquid bath cleaning, and areas where powder adhesion is particularly severe before liquid bath cleaning. After a preliminary operation of spraying air or high-pressure water onto the substrate, the liquid bath cleaning may be performed.

Furthermore, for example, in the configuration of the above embodiment, by providing a liquid-tight shutter for the chute and making the bathroom penetration part liquid-tight so that there is no need to remove this shutter, all molded elements can be removed. Of course, it is possible to wash all of the various molded elements at the same time in the liquid bath described above, but the present invention is not necessarily limited to washing all of the various molded elements at the same time. It is also possible to remove one molded element and wash it by hand, and then wash most of the remaining molded elements at the same time in a liquid bath, which also greatly reduces labor and effort. It goes without saying that it is possible.

Further, when a solvent is used in the cleaning liquid, it may be collected and recycled for further use.

In addition, it goes without saying that the configuration of the rotary powder compression molding machine that implements the method of the present invention is not limited to that shown in the above embodiment, and the cleaning cycle of the method of the present invention also
It goes without saying that the present invention is not limited to the embodiments 1-2 and can be constructed and implemented in various ways as long as it does not contradict the gist of the invention.

[Effects of the Invention] Since the present invention described above has the configuration described in the claims above, it includes not only the rotary disk, but also the mortar and punch attached thereto, and the rotary disk disposed around the rotary disk. The present invention has the advantage that these powder contacting members can be simultaneously and automatically cleaned and dried in a liquid bath without the need for removing various molding elements.

[Brief explanation of drawings]

The drawing is a configuration explanatory diagram showing an apparatus system for carrying out the method of the present invention. 6...Bathroom, 9...Water supply pipe, 10...Air supply pipe, 1
1...Cleaning unit, 12...Cleaning liquid tank, 13
...Pump, 14.16.18...Opening/closing valve, 15.
...Hot air generator, F...Drain pipe, 19...Cleaning cycle control device, 25...Rotary disk, 26...Murder, 2
7... Upper punch, 28... Lower t'F, 29... Molding element (powder feeder), 30... Molding element (upper punch guide track), 32... Molding element (lower punch guide track), 33.34
...Molding element (pressure roller).

Claims (1)

[Claims] The rotary powder compression molding machine is equipped with the rotary powder compression molding machine with the punch and mortar still attached to the rotary disc, and with the various molding elements still arranged around the rotary disc.
Fill the bath containing the mortar and various molding elements with cleaning liquid to at least the height of the upper pestle of the molding elements, and then drive the rotary powder compression molding machine under this liquid bath to clean the molding elements. A method for cleaning a rotary powder compression molding machine, characterized in that after this liquid bath cleaning, the cleaning liquid is discharged from the bathroom to the outside, and then dry air is blown into the bathroom.