JPH02229567A - container coating equipment - 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 the Invention The present invention relates to a device for coating the external surface of containers, particularly containers such as bottles.

[Conventional technology]

BACKGROUND ART Containers, especially glass containers that are collected and used repeatedly, such as beer bottles, rub against each other during the bottle filling process and distribution process, causing scratches on the top and bottom surfaces of the container bodies. As a result, the appearance of glass containers deteriorates as the number of times they are collected and used increases, reducing the commercial value of bottled beverages.

In order to cope with such problems, various coating apparatuses have been proposed in the past, and these apparatuses are roughly classified into the following three types depending on their coating method.

Namely, (1) a method of applying pressure on a bottle with sponge, felt, etc. (Japanese Utility Model Application Publication No. 62-198237, etc.); (2) A method of application using a rotating belt method (Japanese Patent Publication No. 59-22897).
3. Publication No. 60-33232, Utility Model Application No. 62-19
8238, Publication No. 62-199175, etc.), (2) One-way spray method in which a coating liquid is sprayed onto a bottle, etc. have been proposed.

[Problem to be solved by the invention]

However, in the above-mentioned method (2), in which the bottle is pressed against felt etc. impregnated with the coating liquid and the liquid is squeezed out, the amount of application is regulated by the force that compresses the felt etc. The amount of coating applied to the surface varies widely.

Furthermore, as the felt hardens and becomes flattened, reliable rotational coating may not be possible, resulting in insufficient coating of the entire surface. Furthermore, if a sponge is used instead of felt, there is a risk of liquid dripping and the amount of application varies widely.

On the other hand, with the rotating belt method described in (2) above, a sufficient amount of liquid can be applied to the applicator belt, and the liquid nose can be adjusted uniformly by squeezing between the rollers and a scraper, and liquid volume management is easy. If there are severe scratches on the upper and lower parts, the amount of coating liquid will be larger on the torso where there are fewer scratches. Therefore, the coating film on the label pasting part becomes partially thick, and there is a risk that the label will be damaged.

In addition, the one-way spray method described in (2) above has the advantage that the amount of application can be easily adjusted by selecting the nozzle diameter and pressure. The problem is that it is difficult to coat.

Furthermore, these conventional coating devices still have many problems in terms of manufacturing cost, installation space, and maintenance after use.

In view of these circumstances, the present invention solves the above problems, allows coating to be performed easily and reliably, allows adjustment of the coating film thickness after coating, and improves the ability to stretch the coating solution.
To provide a coating device for containers that can polish bottles, is inexpensive to manufacture, requires less installation space, and is easy to maintain after use.

[Means to solve the problem]

In order to solve these problems, the present invention provides a conveyance mechanism having a conveyance path for conveying containers, a porous synthetic resin plate for coating installed upright on at least one side of the conveyance path, and a porous synthetic resin plate installed along the conveyance path. and a liquid supply unit 1 for temporarily connecting the coating liquid to the coating liquid tank, and a liquid supply unit 1 for supplying the coating liquid to the coating liquid tank. , and includes a plurality of branched thin tubes that contact a porous synthetic resin plate for coating, the porous synthetic resin plate for coating is in contact with a container to be conveyed, and the conveying mechanism, the rotation The mechanism is configured to apply the coating liquid to the entire surface while rotating and transporting the container.

[Effect]

According to the present invention, the bottle conveyed by the conveyor belt is frictionally engaged with the coating porous synthetic resin plate facing across the conveyance path and the bottle rotation belt, and moves along the conveyance path while receiving rotational force. transported.

At this time, the coating porous synthetic resin plate is soaked with a predetermined amount of coating liquid supplied from the liquid supply unit, and the coating liquid is uniformly applied to the outer peripheral surface of the bottle. The bottle coated in this manner is engaged with the bottle rotation belt, and is also frictionally engaged with a wiping plate and a porous synthetic resin wiping plate disposed opposite to each other, thereby adjusting the coating film thickness, The bottles are polished, etc.

This makes it possible to perform coating easily and reliably, adjust the coating film thickness after coating, mediate the coating liquid, and polish the bottle.Moreover, the manufacturing cost is low, and the installation space is small. The size will be reduced.

Furthermore, since the porous synthetic resin plate impregnated with the coating liquid is removable, maintenance after use is extremely easy.

〔Example〕

Embodiments of the present invention will be specifically described below with reference to FIGS. 1 to 5. In addition, as a container, a beer bottle (hereinafter referred to as
The explanation will be given by taking a bottle (referred to as a bottle 30) as an example.

FIG. 1 is a plan view of a container coating apparatus 1 of the present invention;
FIG. 2 shows its side view.

In these figures, the coating device 1 includes a conveyance mechanism having a conveyor belt 18 on which bottles 30 are placed and conveyed;
A porous synthetic resin plate 12 for coating is provided upright along one side of the conveyor belt 18, a porous synthetic resin plate 20 for wiping is provided facing the downstream side of the resin plate 12, and a porous synthetic resin plate 20 for wiping is provided. It has a container rotation mechanism including bottle rotation belts 14 and 15 provided along the conveyance path of the belt 18, and a liquid supply unit W connected to the porous synthetic resin for coating [12 and for supplying the coating liquid. are doing.

In the conveyance mechanism, an endless conveyor belt 18 is connected to a rotational drive source (not shown), and the bottle 30 is continuously conveyed from the right to the left in FIG. 1 by the rotational drive source. ing.

The back surface of the porous synthetic resin plate 12 for coating, which is erected along the conveyor belt 18, is fixed and integrated with a one-touch plate 22 for fixing the resin plate, and this plate 22 can be attached or detached (not shown). Depending on the tool, the base body 3
It is attached to 2 so that it can be removed.

This base body 32 is fixed to the device fixing table 11, and can be slightly slid back and forth by a slide mechanism (not shown) in order to accommodate the outer diameter of the bottle 30 on the conveyance path, that is, to accommodate other types of bottles.

The coating porous synthetic resin plate 12 is connected to a liquid supply unit W, which will be described later, so that a fixed amount of alcohol-based, water-based, etc. coating liquid is always supplied.

As such a porous synthetic resin plate 12 for coating, it is preferable to use a so-called sponge-shaped plate formed by foaming a vinyl acetate resin, particularly a resin containing polyvinyl alcohol (pVAL).

Vinyl acetate-based resins, especially polyvinyl alcohol (P
The reason why the resin containing VAL) is preferable is as follows. That is, this material has excellent properties in terms of abrasion resistance and liquid absorbency, and allows the coating liquid to be applied, stretched, etc. to be performed reliably and easily. The length of this porous synthetic resin plate 12 is set to be sufficient to coat and stretch the bottle 30 sufficiently, and this value is usually appropriately determined depending on the outer diameter of the bottle 30 and the like.

3 and 4 on the back side of this porous synthetic resin plate 12.
As shown in the figure, a plurality of concentric four parts 12a are provided to soften the resin plate 12 itself and to soften the contact with the bottle 30. The depth of these four parts 12a is usually resin! The thickness is approximately half that of 212.

This porous synthetic resin for coating 12 and a slight separation gap P
A wiping plate 13 is provided along the conveyance path (FIG. 1). In this case, the coating liquid is not normally supplied to the wiping plate 13, and only the adjustment of the coating film thickness, the polishing of the bottle, etc. are carried out. The material of this wiping plate 13 is usually the same as that of the porous synthetic resin plate 12 for coating.
As for the structure, it is preferable that the wiping plate 13 has a finer mesh and is softer.

As shown in FIG. 2, a reservoir 40 is connected to the lower end of the porous synthetic resin temporary 12 to prevent coating liquid from dripping. The material of this storage body 40 is usually the same as that of the porous synthetic resin plate 12.

Next, a description will be given of the liquid flooding unit W that supplies the coating liquid to the porous synthetic resin plate 12 for coating (note that some parts of the unit, such as the plurality of distribution pipes, are omitted in Fig. 1). be).

The liquid co-supply 1 knit W is equipped with a coating liquid tank 2 installed at a predetermined height next to the conveyance path, and a vibrator 3 is connected to the bottom of the tank 2. A valve 4 and a liquid volume control valve 5 are provided, and a liquid distribution level tank 6 is fixed to the tip of the pipe 3, and a plurality of distribution pipes 7 hang down from this tank 6.

Then, the presence or absence of the bottle 30 on the conveyance path is detected by a sensor (not shown) installed on the conveyance path, and the solenoid valve 4 is opened and closed based on this signal.
Control of the amount of application is generally determined by the opening degree of the liquid amount adjustment valve 5.

Each of these distribution pipes 7 is equipped with a liquid volume fine adjustment valve 8.
, trap ball 9, capillary tube 1 via overflow tube 92
0 are connected, and the coating amount is finely adjusted by the opening degree of the liquid amount fine adjustment valve 8, and the trap ball 9 keeps the head in a constant position, stabilizing the coating liquid supply.
Uniformity is being achieved. That is, as shown in FIG. 5, the structure of the trap ball 9 includes a hollow, approximately spherical trap portion 91 and an overflow tube 92 having a tip opening E inserted to the center of the hollow portion of the trap portion 91. The coating liquid flowing into the trap ball 9 overflows from the tip opening E and flows out toward the coating porous synthetic resin plate 12. Therefore, when the inflow of liquid from upstream of the trap ball 9 is stopped, the inside of the trap ball 9 becomes a vacuum, and dripping of liquid from the tip opening E is immediately prevented.

The tip of the thin tube 10 connected to the overflow tube 92 and extending in the horizontal direction is connected to the one-touch plate 22 for fixing the resin plate.
, a porous synthetic resin plate 1 for coating passes through the base body 32.
The porous synthetic resin plate 12 is in contact with or embedded in the porous synthetic resin plate 12.
A substantially constant amount of coating liquid is sucked in by capillary action.

In the case of this embodiment, the thin tube 10 adopts a three-stage system (three stages arranged in the height direction) that almost coincides with the scratched area on the outer peripheral surface of the bottle 30, and also has a porous synthetic tube for auxiliary supply. Two feeding methods are employed in which the coating liquid is dripped from the upper thin tube 10a disposed on the upper part of the resin plate 12 to impregnate the resin plate 12. The feeding method, the installation position of the thin tubes 10, the number of tubes, etc. are appropriately selected depending on the condition of the bottle 30. By changing the amount of co-feeding and co-feeding position of each of the thin tubes 10 as appropriate,
The distribution of impregnation of the coating liquid into the porous synthetic resin layer 12 for coating can be changed arbitrarily.

Such a thin tube 10 is made of glass or plastic and has an inner diameter of about 0.5 to 1 inch. This is to make effective use of capillary action.

Coated porous synthetic resin impregnated with such a coating liquid 1! The porous synthetic resin board 20 for wiping, which is provided facing the downstream part of the i212, is fixed to a fixed base board 33 that stands upright along the conveyance path, and this board is mainly used for the wiping. In cooperation with the plate 13, it plays the role of spreading the coating liquid applied to the outer peripheral surface of the bottle 30 and polishing the surface of the bottle.

Belts 14 and 15 for bottle rotation are wound around a drive pulley and a driven pulley at the upper and lower ends of this wiping porous synthetic resin temporary 20, respectively, and are provided along the slaughtering path. This belt 14.15
The bottle 30 is in frictional engagement with the outer periphery of the bottle 30, and the bottle 30 is rotated by the drive of the belt 14,15.

Next, the operation of the present invention described above will be explained.

The bottle 30 transported by the transport belt 18 is frictionally engaged with the coating porous synthetic resin plate 12 facing across the transport path and the bottle rotation belt 14, 15, and moves along the transport path while receiving rotational force. transported.

At this time, the coating porous synthetic resin plate 12 is impregnated with a predetermined amount of the coating liquid supplied from the liquid supply unit W, and the coating liquid is applied substantially uniformly to the outer periphery of the bottle 30. The bottle 30 coated in this manner is engaged with the bottle rotation belts 14 and 15, and is further frictionally engaged with the wiping material 13 and the wiping porous synthetic resin plate 20, which are arranged opposite to each other. The coating thickness is adjusted, the bottle is polished, etc.

The following experimental examples were conducted to further explain the embodiments as described above in more detail.

That is, beer bottles were actually coated using two types of devices of the present invention (with and without a porous synthetic resin plate for polishing) and a conventional rotating belt type device.

The coating porous synthetic resin plate 12 of the apparatus of the present invention is a polyvinyl alcohol (PVAL) sponge, and has a size of 5.
00R x 150w x 15t, the wiping board 13 and the porous synthetic resin board for wiping 20 (porous synthetic resin board for polishing) are made of the same material as the one for coating, and the dimensions are 300# x 1
00wX7t was used.

The results are shown in Table 1 below.

As for device evaluation item 1, the following items were taken up and evaluated: ■Degree of label damage, ■Degree of shielding scratches, ■Installation space, ■Production cost, and ■Maintenance.

In particular, ■Evaluation criteria for the degree of label damage are as follows: ◎...Label damage [1 not 0...
- Damage to the label is somewhat noticeable △...Damage to the label [1 stands ×...Damage to the label is considered to be very noticeable.

The results are shown in Table 1 on the next page. (Margin below) When using the device of the present invention, coating is performed using a porous synthetic resin plate (sponge) containing polyvinyl alcohol resin (PVAL), and in order to take advantage of this feature, it is necessary to c P) In the low viscosity range below, especially,
Preferably, a coating solution of 5 to 10 centipoise (cP) is used.

The apparatus of the present invention exhibits excellent effects particularly on water-based coating liquids. Alcohol-type coating liquids have problems only in terms of volatilization and maintenance.

In addition, in the present invention, the porous synthetic resin plate for coating 1
2 and the wiping plate 13 (one resin plate), coating, polishing, etc. can be performed while adjusting the supply amount of each of the plurality of thin tubes 10.

〔Effect of the invention〕

The present invention provides a transport mechanism having a transport path for transporting containers;
A coating porous synthetic resin plate erected on at least one side of the conveyance path, a container rotation mechanism provided along the conveyance path, and a container rotation mechanism connected to the coating porous synthetic resin plate for co-supplying a coating liquid. The liquid supply unit includes a coating liquid tank and a plurality of branched thin tubes that are connected to the liquid tank and come into temporary contact with the porous synthetic resin for coating, The synthetic resin plate is in contact with the container being transported, and the container is rotated and transported by the transport mechanism and the rotation mechanism, and the entire surface is coated with the coating liquid, so coating is easy and easy. It can be carried out reliably, the thickness of the coating film after coating can be adjusted, the coating liquid can be stretched, and the bottle can be polished.Moreover, the manufacturing cost is low, and the installation space can be reduced.

Furthermore, since the porous synthetic resin plate impregnated with the coating liquid can be removed, maintenance after use is extremely easy.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a container coating apparatus 1 of the present invention;
Fig. 2 is a side view thereof, Fig. 3 is a partial cross-sectional view of the porous synthetic resin (for coating) used in the present invention, and Fig. 4 is a cross-sectional view taken in the direction of the (IV)-(TV) arrow in Fig. 3. , FIG. 5 is a sectional view of a trap ball used in the present invention. l...Coating device, 2...Coating liquid tank, 4...Solenoid valve, 5...Liquid volume adjustment valve, 6...
...Liquid distribution level tank, 8...Liquid volume fine adjustment hub,
9... Trap ball, 10... Thin tube, 11... Device fixing stand, 12... Porous synthetic resin for coating, 13...
・Wiping plate, 14.15... Belt for bottle rotation, 18...
- Conveyor belt, 20... Porous synthetic resin plate for wiping, 30... Bottle. Applicant's representative Yasuo Ishikawa＼I Figure 12a Figure 12a

Claims (1)

[Scope of Claims] A conveyance mechanism having a conveyance path for conveying containers, a porous synthetic resin plate for coating installed upright on at least one side of the conveyance path, and a container rotation mechanism provided along the conveyance path; a liquid supply unit connected to the porous synthetic resin plate for coating and for supplying a coating liquid, the liquid supply unit being connected to a coating liquid tank and the liquid tank, and connected to the porous synthetic resin plate for coating. The porous synthetic resin plate is in contact with the container to be transported, and the coating liquid is rotated and transported by the transport mechanism and the rotation mechanism. A container coating device characterized by coating the entire surface.