JP2953175B2 - Wax coating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process for manufacturing a bottomed cylindrical can body such as an aluminum can for storing drinking water, beer and the like, which is a front stage of a necking apparatus for reducing the diameter of an opening of the can body. The present invention relates to a wax coating device provided on the outer surface of a can body for applying a wax for preventing seizure at the time of necking to the outer peripheral surface of the opening of the can body.

[0002]

2. Description of the Related Art In recent years, aluminum cans have been used as containers for soft drinks, beer, and the like.
Before the opening at one end is closed, a peripheral wall near the opening is subjected to a process of sequentially reducing the diameter to increase rigidity, that is, a so-called necking process.

In this necking process, as shown in FIG. 1, the opening 1a of the aluminum can (can body) 1 is
This is performed by inserting and reducing the diameter of the sizing die 2 having a smaller inner diameter than the outer diameter of the sizing die 2 at a predetermined pressure. In some cases, seizure occurred.

Therefore, conventionally, as shown in FIG. 2, a lubricant application device 4 is installed in front of the necking device 3, and the outer peripheral surface of a portion where the aluminum can 1 is subjected to the necking process by the lubricant application device 4. A solvent (hexane) -mixed lubricant is applied to the surface.

More specifically, the lubricant coating device 4
As shown in FIG. 3, a guide plate 5 on which the aluminum can 1 is rolled and conveyed in a direction perpendicular to its axis, and a solvent-mixed lubricant L disposed below the guide plate 5
, A coating pad 7 made of a porous material disposed on one side of the guide plate 5 in parallel with the conveying direction of the aluminum can 1, and pressing the aluminum can 1 from above. And a transport belt 8 that transports while rolling on the guide plate 5. The lower end of the application pad 7 is inserted into the lubricant L in the pan 6. The outer peripheral surface of the opening of the aluminum can 1 in the transport state is brought into contact with the aluminum can 1.

The lubricant L is sucked up from the inside of the pan 6 by the capillary action of the application pad 7 to the upper end surface thereof, and is applied to the outer peripheral surface of the aluminum can 1 which is rolled in contact with the upper end surface. It is supposed to be.

[0007]

However, the following problems occur in the above-mentioned conventional lubricant applying apparatus.

That is, the lubricant L in the pan 6 is guided to the application portion by the capillary action of the application pad 7,
This is a problem that the amount of the lubricant L guided to the upper surface of the application pad 7 is not constant due to unevenness of the porosity of the application pad 7 and the like.

When the lubricant L is applied, the application pad 7 is slightly pressed and deformed by the aluminum can 1, whereby the lubricant L is squeezed out, whereby the application to the aluminum can 1 is performed. However, due to a change in the contact state between the aluminum can 1 and the application pad 7, the amount of the squeezed lubricant L changes.

Further, the aluminum can 1 is continuously conveyed to the upper surface of the application pad 7. In order to suppress the variation in the amount of the lubricant L applied, the suction speed of the lubricant L by the application pad 7 is reduced. This limits the supply speed of the aluminum can 1, that is, the transport speed.

As described above, in the prior art, the amount of the lubricant L applied to the aluminum can 1 is not stable, which greatly affects the smoothness of the necking process in the subsequent necking device 3. .

Further, the conveying speed of the aluminum can 1 is limited in the lubricating oil applying device 4, which has a great influence on the production efficiency.

On the other hand, in the above-mentioned prior art, since a solvent-mixed type lubricant is used, the concentration of the lubricant greatly depends on the amount of replenishment of the solvent. Since the substance is often a highly volatile substance, it is necessary to control the replenishment of the solvent including the volatile matter, so that the concentration control of the lubricant is complicated.

Further, since the solvent has volatility, the working environment is deteriorated in a factory which is a closed space, which is not preferable for the health of workers.

Further, solvents such as hexane have extremely high flammability, and strict safety management is required.

The present applicant has proposed a novel wax coating method and a new coating apparatus for solving the above-mentioned conventional problems (see Japanese Patent Application No. 3-139292). First, the wax coating device will be described. As shown in FIG.
A wax coating device which is provided in front of the necking device 3 for reducing the diameter of the opening 1a of the aluminum can 1 and applies a solventless wax W to the outer peripheral surface of the opening 1a of the aluminum can 1. A guide plate 11 on which the aluminum can 1 is rolled and conveyed in a direction perpendicular to the axis thereof; a wax pan 12 in which the wax W is accommodated; The outer peripheral surface of the opening 1a of the aluminum can 1 which is disposed in parallel with the carrying direction and is in a carrying state is brought into contact with the outer peripheral surface of the opening 1a of the aluminum can 1 while the wax W in the wax pan 12 is brought into contact therewith. And a coating roller 13 for coating the surface.

Next, the wax pan 12 is mounted on a base 14 in a substantially horizontal state as shown in FIG. 5, and an opening 12a formed thereabove is formed. The guide plate 11 is mounted so as to cover.

Further, as shown in FIG.
A heater 15 for heating and melting the wax W accommodated therein is attached to the lower surface of 2.

The guide plate 11 has a plurality of ridges 16 formed along the transport direction of the aluminum can 1 at intervals in the axial direction of the aluminum can 1. The aluminum can 1 is supported.

Further, above the guide plate 11,
Side plates 17 and 18 that are substantially perpendicular to the guide plate 11 are disposed at predetermined intervals on both sides of the aluminum can 1 in the transport direction.

The two side plates 17 and 18 are provided with bolts 20 and 2 on stays 19 (only one of the stays 19 is shown in FIGS. 4 and 5) standing on the base 14.
Aluminum can 1 attached and transported via 1
This aluminum can 1
In the axial direction.

The distance between the bolts 20 is
21 adjusts according to the length of the aluminum can 1.

On the other hand, in the present embodiment, as shown in FIG. 4, a pickup roller (supply roller) 22 is disposed in the wax pan 12 along the transport direction of the aluminum can 1. This pickup roller 22
While immersed in the wax W in the wax pan 12, a part of the outer periphery is exposed outside the wax W, and is rotatably supported by the wax pan 12 in this state.

As shown in FIG. 5, one end of the rotary shaft 23 of the pickup roller 22 is projected outward from the wax pan 12, and the projected end is connected to the pickup roller 22. Is connected via a belt 25.

The pickup roller 22
As shown in FIG. 4, a doctor roller (adjustment roller) 26 and an applicator roller 27 are disposed in parallel at a portion of the wax W exposed above the liquid surface.

The doctor roller 26 and the applicator roller 27 are rotatably connected to each other by connecting plates 28 at both ends thereof. Is connected rotatably.

Each of the connecting rods 29 is slidably inserted into a frame 30 attached to the wax pan 12 in parallel with the axis of the pickup roller 22.
At the end opposite to the side connected to the connection plate 28, the pickup roller 2 of the frame 30 is attached.
A position adjusting nut 31 that is brought into contact with the surface opposite to the side facing 2 is screwed.

A compression spring 32 is interposed between the frame 30 and each of the connection plates 28. The compression spring 32 elastically moves the connection plate 28 away from the frame 30. By being emitted, each of the doctor rollers 26 and the applicator roller 27 are brought into contact with the outer peripheral surface of the pickup roller 22. The connection plate 28, the connection rod 29, the frame 30, the position adjustment nut 31, and the compression spring 32 constitute a contact pressure adjustment mechanism.

The applicator roller 27 brought into contact with the pickup roller 22 in this manner
As shown in FIG. 4, the upper end is held at substantially the same height as the upper surface of the guide plate 11, and the body portion has a small distance from the edge of the aluminum can 1 on the side of the opening 1 a in the middle of transportation. At the position where it enters the side of 1b, the outer peripheral surface of the aluminum can 1 is brought into contact, and the applicator roller 27 serves as the application roller 13.

The applicator roller 27
Has a length S ₁ (see FIG. 6) longer than the circumference of the aluminum can 1.

Further, as shown in FIG. 6, at the front and rear ends of the guide plate 11 in the transport direction, opposite to both ends of the applicator roller 27, there are raised portions (contact prevention portions) projecting upward. ) 11a are formed. Sloped surfaces 11a ₁ and 11a ₂ are formed at both ends of the raised portion 11a along the aluminum can transport direction, and the distance S between the tips of the inclined surfaces 11a ₁ and 11a ₁ is formed.
₂ is set slightly longer than the circumference of the aluminum can 1, and the aluminum can 1
When the aluminum can 1 is conveyed to both ends, the aluminum can 1 is pushed upward to prevent the outer peripheral surface of the opening of the aluminum can 1 from contacting the applicator roller 27.

On the other hand, as shown in FIG. 5, a pair of transfer devices 33 and 34 are provided above the guide plate 11 along the transfer direction.

The conveying device 34 provided on the upstream side includes two belts 35 stretched so as to have a parallel portion with the guide plate 11, and a tensioner 36 for adjusting the tension of these belts 35. Have been.

The transport device 33 provided on the downstream side
Are two belts 37 stretched so as to have a parallel portion with the guide plate 11, a tensioner 38 for adjusting the tension of these belts 37, and elastically move the parallel portion toward the guide plate 11. And a pressing roller 39 for suppressing the floating of the parallel portion by pressing the pressing member 39.

Then, each of these transporting devices 33 and 34
The aluminum can 1 is rolled while being pressed against the guide plate 11 by the respective belts 35 and 37, so that the aluminum can 1 is sequentially conveyed to the downstream side.

The transport speed of the downstream transport device 33 is set higher than the transport speed of the upstream transport device 34.

Next, a description will be given of the wax application method together with the operation of the wax application apparatus 10 configured as described above.

First, a solventless wax W is charged into the wax pan 12, and the wax W is heated to a predetermined temperature by the heater 15.

After the wax W has a predetermined viscosity by such a heating operation, the drive motor 24 is started to rotate the pickup roller 22.

With the rotation of the pickup roller 22, the doctor roller 26 and the applicator roller 27 that are in contact with the pickup roller 22 are simultaneously rotated, and the wax W in the molten state is It adheres to the outer peripheral surface and is sent upward.

The wax W sent upward by the pickup roller 22 is first scraped off by an excess amount by the doctor roller 26.
It is sent to the applicator roller 27 side at the subsequent stage, and is adhered so as to be transferred from the pickup roller 22 to the applicator roller 27 at a contact portion with the pickup roller 22.

Thus, the wax W is continuously fed from the wax pan 12 to the applicator roller 27 in an appropriate amount.

The applicator roller 27
Of the supply amount of the wax W to the doctor roller 26, the applicator roller 27 and the pickup roller 22 by rotating the position adjusting nut 31.
This is done by adjusting the contact pressure with the contact.

Then, the aluminum can 1 is continuously conveyed onto the guide plate 11 by the conveying devices 33 and 34, and the outer peripheral surface near the opening 1a is brought into contact with the applicator roller 27 so that the outer peripheral surface is The wax W is applied.

More specifically, the aluminum can 1 is continuously supplied from a hopper or the like (not shown) to a transfer device 34 arranged on the upstream side by its own weight or the like in the same posture. At the downstream side to the transport device 33.

The downstream conveying device 33 conveys the aluminum cans 1 at a higher speed than the upstream conveying device 34, thereby forming a predetermined interval between the aluminum cans 1 and continuously. Transport.

When the aluminum can 1 conveyed by the conveying device on the downstream side approaches the end of the applicator roller 27, at least its opening 1a is raised upward by the raised portion 11a formed on the guide plate 11. The applicator roller 27 is lifted to prevent contact with the end of the applicator roller 27.

In this way, the applicator roller 2
After the treatment for preventing excessive application at the end of the aluminum can 7, the aluminum can 1 is separated from the raised portion 11a, so that the opening 1a is lowered toward the applicator roller 27, and the raised portion is The opening 1a is brought into contact with the outer surface of the applicator roller 27 when it is completely separated from 11a.

Here, the applicator roller 27 is continuously rotated, and the aluminum can 1 is also moved in the axial direction of the applicator roller 27 while rolling. The contact locus on the outer surface of the applicator roller 27 is spiral as shown by the curve A in FIG. 7, and since the aluminum can 1 is continuously transported, the plurality of contact locuses A are parallel. Formed in a state.

The coated aluminum can 1 is pushed up by the raised portion 11 a formed on the guide plate 11 at the downstream end of the guide plate 11, and The wax W to be formed is supplied to the necking device 3 at the subsequent stage while avoiding contact with the pool.

As described above, according to the wax coating apparatus, the wax W in the wax pan 12 is a solventless wax, and its concentration is kept constant, and the wax W is forced by the pickup roller 22. And then adjusted to an appropriate amount by the doctor roller 26, the applicator roller 2
7, the supply amount of the wax W to the applicator roller 27 becomes uniform.

Further, since the application of the wax W to the aluminum can 1 is forcibly performed by the applicator roller 27, the application to the aluminum can 1 is also uniform.

Further, as described above, since the application and the concentration of the wax W to the aluminum can 1 become uniform, even if the application width B of the aluminum can 1 as viewed from the radial direction is narrowed, a sufficient amount is obtained. Can be applied, and as a result, the wax W
Consumption is reduced.

As described above, in the wax coating method and the coating device proposed by the present applicant, various problems which have conventionally occurred can be solved. However, in this wax coating device, a pair of guides for guiding the can 1 is provided. Side plate 17
The distance between 18 is adjusted according to the length of the can 1 by the bolts 20 and 21,
Since the position of the side plate 18 for guiding the tip side of the can 1 is defined just above the applicator roller 27, in order to cope with the difference in the length of the can 1,
It is necessary to move and adjust the position of the side plate 17 for guiding the bottom of the can body 1. In this case, since the line for carrying in and out the can 1 with respect to the wax applicator is generally based on the bottom of the can 1, the transfer position of the bottom of the can 1 in the wax applicator is determined. If it is displaced, there is a problem that the can body 1 cannot be smoothly delivered before and after the wax coating device, and there is a problem that it can correspond to only one kind of can body 1 in practice.

The present invention has been made in view of the above circumstances, and an object of the present invention is to be able to flexibly cope with can bodies of various lengths, and to ensure that the outer peripheral surface of the opening of the can body is secured. Another object of the present invention is to provide a wax coating apparatus which can apply a wax to a can and can smoothly transfer a can body before and after a wax coating step.

[0056]

In order to achieve the above object, the present invention provides a wax coating apparatus for applying wax to an outer peripheral surface of an opening of a bottomed cylindrical can body, wherein the can body comprises: A guide plate that is rolled and conveyed in a direction perpendicular to the axis thereof, conveying means that is provided above the guide plate, and that rolls and conveys the can on the guide plate; A side plate for guiding a bottom portion, a wax pan in which the wax is stored, and an opening portion of the can body disposed on one side of the guide plate in parallel with a direction in which the can body is conveyed and in a conveyed state. And a coating roller that applies the wax in the wax pan to the outer peripheral surface of the opening of the can body.
The guide plate, the transporting means, the wax pan, and the application roller are provided movably with respect to the side plate in a direction orthogonal to the transport direction of the can body.

In the wax coating apparatus according to the present invention, with the side plate for guiding the bottom of the can fixed,
By moving and adjusting the guide plate, the conveying means, the wax pan, and the application roller in a direction orthogonal to the conveying direction of the can body, the can body can be conveyed on the basis of the bottom in an arbitrary length can body.

[0058]

An embodiment of the present invention will be described below with reference to FIGS.

In the following description, the same parts as those of the conventional art will be denoted by the same reference numerals, and the description will be simplified.

In these figures, reference numeral 40 denotes a fixed base, on which the base 14 is horizontally movable while being supported and guided by a pair of guide rails 41. Further, between the base 14 and the fixed base 40, there is provided a horizontal moving mechanism 42 (for example, a conventionally well-known one comprising a motor, a feed screw shaft and a nut body) for moving the base 14. A fixing mechanism 47 for preventing movement of the base 14 is provided on both sides of the fixing base 40. The fixing mechanism 47 is provided at the tip of a handle 49 screwed into a support plate 48. Is pressed against the side surface of the base 14 to fix the base 14. . In addition, the fixed table 40
A side plate 17 for guiding the bottom of the aluminum can 1 supported by the stay 19 is attached to the base plate 14, the guide plate 11, the wax pan 12, and the application roller. 13,
The side plate 18, the drive motor 24, the contact pressure adjusting mechanism, the transfer devices 33 and 34, and the like are configured to be able to move horizontally. Each of the transporting devices 33 and 34 has two belts 37 and 35 stretched so as to have a parallel portion with the guide plate 11, and these belts 37.3
The belt control mechanisms 43 and 44 for suppressing the floating of the parallel portion by adjusting the tension of the parallel portion 5 and elastically pressing the parallel portion toward the guide plate 11 side.
And is constituted by. Further, each of the transfer devices 3
The drive motors 4 and 3 are connected to the drive motor 4 via a transmission mechanism 45.
6 are connected to each other, and each of the transfer devices 33 and 34, the transmission mechanism 45, and the drive motor 46 constitute a transfer unit.

In the wax coating apparatus configured as described above, an appropriate amount of the wax W is continuously fed from the wax pan 12 to the applicator roller 27 as in the conventional example shown in FIGS. At the same time, the aluminum can 1 is continuously conveyed onto the guide plate 11 by the conveying devices 33 and 34, and the outer peripheral surface near the opening 1 a is brought into contact with the applicator roller 27, so that the wax is applied to the outer peripheral surface. W is applied. In this case, prior to the operation of the wax coating apparatus, the horizontal moving mechanism 42 is operated according to the length of the aluminum can 1 to be conveyed, and the base 14 (the side plate 17) is moved relative to the fixed base 40 (side plate 17). The side plate 18) is moved horizontally by a predetermined distance. Next, the handle 49 of the fixing mechanism 47 is rotated, and the distal end surface of the handle 49 is pressed against the side surface of the base 14 to fix the base 14. Thereby, the transport line of the device for carrying the aluminum can 1 in and out of the wax coating device (based on the bottom of the aluminum can 1) and the transport line of the wax coating device (the guide surface by the side plate 17).
Therefore, the aluminum can 1 can be smoothly and reliably carried in and out of the aluminum can 1 having an arbitrary length, and the step of applying a wax to the outer peripheral surface of the opening of the aluminum can 1 is hindered. Done without.

In each of the above examples, the case where wax is applied to the aluminum can 1 has been described. However, as long as it is a can body to be necked, the material is not limited, and it is naturally applicable to an iron can or the like. What you get.

[0063]

As described above, the present invention relates to a wax applying apparatus for applying wax to an outer peripheral surface of an opening portion of a bottomed cylindrical can body, wherein the can body is oriented in a direction perpendicular to its axis. A guide plate that is rolled and conveyed, a conveying means that is provided above the guide plate, and that rolls and conveys the can on the guide plate, and a side plate that guides the bottom of the can on the guide plate The wax pan containing the wax and the outer peripheral surface of the opening of the can body that is disposed on one side of the guide plate in parallel with the conveyance direction of the can body and is in a conveyed state are brought into contact with each other. And a coating roller for coating the wax in the wax pan on the outer peripheral surface of the opening of the can body. Since the rate, the conveying means, the wax pan and the application roller are provided so as to be movable in a direction orthogonal to the conveying direction of the can body, the guide is fixed with the side plate for guiding the bottom of the can body. By moving and adjusting the plate, the conveying means, the wax pan, and the application roller in a direction perpendicular to the conveying direction of the can body, the can body of any length can be conveyed based on the bottom thereof, and can be various lengths. Can flexibly respond to the can body, and can reliably apply the wax to the outer peripheral surface of the opening of the can body, and can smoothly deliver the can body before and after the wax application step. .

[Brief description of the drawings]

FIG. 1 is a schematic diagram for explaining a necking method of a can body.

FIG. 2 is a schematic front view for explaining the relationship between a wax coating device and a necking device.

FIG. 3 is a longitudinal sectional side view showing one structural example of a conventional wax coating device.

FIG. 4 is a longitudinal sectional side view of a wax coating device proposed by the present applicant.

FIG. 5 is a front view of a wax coating device proposed by the present applicant.

FIG. 6 is a schematic front view showing a guide plate of a wax coating device proposed by the present applicant.

FIG. 7 is a schematic view showing a contact locus between a can body and an application roller of a wax application device proposed by the present applicant, as viewed on an application roller.

FIG. 8 is a front view showing an embodiment of the present invention.

FIG. 9 is a plan view of FIG.

FIG. 10 is a side view of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Aluminum can (can body) 1a Opening 11 Guide plate 12 Wax pan 13 Application roller 17 Side plate 27 Applicator roller (Application roller) 33/34 Transport device (Transport device) 45 Transmission mechanism (Transport device) 46 Drive motor (Convey means)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B05C 1/02 101-104 G21D 22/20-22/30 G21D 51 / 26,51 / 38,51 / 40 B30B 15/00

Claims (1)

(57) [Claims] 1. A wax application device for applying wax to an outer peripheral surface of an opening of a bottomed cylindrical can body, wherein a guide plate for rolling and conveying the can body in a direction perpendicular to an axis thereof; A conveying means provided above the guide plate for rolling and conveying the can on the guide plate, a side plate for guiding the bottom of the can on the guide plate, and a wax pan containing the wax The one side of the guide plate is disposed in parallel with the direction of transport of the can body, and the outer peripheral surface of the opening of the can body in the transport state is brought into contact with the wax in the wax pan. A wax application device comprising: an application roller for applying an outer peripheral surface of an opening of the can body; And coating rollers, waxing apparatus characterized by being movable in a direction perpendicular to the conveying direction of the can body.