JPH10128215A - Method for applying sealing material to seaming part of noncircular can lid and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily dry a sealing material applied at the seaming part of a noncircular can lid at a low cost. SOLUTION: The noncircular can lid 11 is held in a static state and the sealing material 17 having a large ratio of a solid content is applied like a projecting line onto the seaming part 13 at the peripheral edge of the noncircular can lid 11 by a sealing material injection nozzle 15 moving along the seaming part 13 right above the seaming part 13. The noncircular can lid 11 is thereafter, rotated horizontally at a high speed around the central part of the noncircular can lid 11, by which the sealing material 17 applied like the projecting line is spread to a band form at the seaming part 13 and in succession, the sealing material 17 is rapidly dried at a low temp.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for applying a sealing material to a tightened portion of a non-circular can lid, and more particularly, to a method for applying a sealing material to an end of a non-circular can body made of a thin metal plate. The present invention relates to a method and an apparatus for applying a sealing material to a non-circular can lid peripherally-sealed tightening portion before the tightening step in order to ensure airtightness of the non-circular can lid made of a metal sheet to be wound. Things. In the present specification, including the claims, the term "sealing material" refers to a material such as a compound applied to a tightly-sealed portion of a can lid to secure its airtightness, and it may be determined whether or not it becomes water-soluble. Absent. The “non-circular shape” includes various shapes other than a circular shape, such as a substantially square shape, a substantially rectangular shape, and a substantially elliptical shape.

[0002]

2. Description of the Related Art The operation of applying a sealing material to a tightened portion of a non-circular can lid is generally performed by a lining machine. That is, in the conventional lining machine,
As shown in FIG. 4, the non-circular can lid 1 is supported in a stationary state, and sealing is performed by the sealing material injection nozzle 5 that moves along the winding part 3 immediately above the winding part 3 around the periphery of the non-circular can lid 1. The material 7 is sprayed on the winding portion 3 (FIG. 4A). In this case, the sealing material injection nozzle 5
The sealing material 7 having high fluidity is used to spread the sealing material 7 sprayed by the method in a band shape including the curled edge 3a in the tightening portion 3. That is, the sealing material 7 having a solid content of 40% or less and a water content of 50% or more is generally used. After the sealing material 7 is applied to the winding portion 3 around the periphery of the non-circular can lid 1 in this manner, the non-circular can lid 1 is kept in a high-temperature atmosphere of about 50 to 80 ° C. for about 5 to 10 minutes in a drying step. (FIG. 4B). As described above, the sealing coating film 7 'is formed on the wrapped portion 3 around the periphery of the non-circular can lid 1 (FIG. 4 (3)). After a while
The winding part 3 around the periphery of the non-circular can lid 1 is wound around the edge of the can body 9 (FIGS. 4 (4) and (5)).

[0003]

As described above, in the prior art, in order to expand the sealing material injected by the sealing material injection nozzle into a band shape including a curled edge portion in a wound portion, a high fluidity is required. A sealing material having a solid content of 40% or less and a water content of 50% or more is used. As a result, in the drying step, in order to evaporate a large amount of water contained in the sealing material applied to the wrapped portion of the non-circular can lid, the non-circular can lid is removed by about 60 to 8
It is required to stay in a hot air atmosphere at a high temperature of 0 ° C. for a long time of about 10 to 15 minutes. Therefore, a large-scale drying apparatus that consumes a large amount of fuel is required in the drying step, and the cost increase in the drying step cannot be avoided. Also, delicate control of the drying process is required. By the way, if the non-circular can lid is kept in a high-temperature hot air atmosphere to shorten the drying process,
Often, a dry skin is formed on the surface of the sealing material applied to the tightened portion, and when the sealing material is further heated after the formation of the dry skin, moisture remaining inside the sealing material is turned into steam. The so-called blowhole phenomenon that ruptures the dried epidermis may occur.
Such a blowhole phenomenon causes a product defect. The present invention solves the above-mentioned problems in the prior art, and secures a preferable sealing effect by spreading a sealing material applied to a tightened portion of a non-circular can lid into a band having a required width on the tightened portion. In addition, the sealing material applied to the tightened portion of the non-circular can lid is dried easily and at low cost.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method and an apparatus for applying a sealing material to a tightened portion of the following non-circular can lid.

(1) The non-circular can lid is supported in a stationary state,
A method in which a sealing material is jetted onto the winding portion by a sealing material injection nozzle that moves along the winding portion directly above the winding portion on the periphery of the non-circular can lid, and then the sealing material is dried. After applying a sealing material having a large solid content ratio to the winding portion by the sealing material injection nozzle in a ridge shape, the non-circular can lid is horizontally moved at a high speed around the center of the non-circular can lid. A non-circular can, characterized in that the sealing material applied in the form of a ridge is spread in a band shape around the winding portion by rotating, and then the sealing material is dried at a low temperature and in a short time. A method of applying a sealing material to a wound portion of a lid (claim 1).

(2) In the vicinity of the feeding device for intermittently feeding the non-circular can lid, when the non-circular can lid is in a stationary state, a portion immediately above the peripheral portion of the periphery of the non-circular can lid is used as the curling portion. A sealing material injection nozzle for applying a sealing material having a large solid content ratio on the winding portion while projecting along the sealing portion is provided, and a central portion of the non-circular can lid is provided behind the sealing material injection nozzle. A device for applying a sealing material to a tightened portion of the non-circular can lid, wherein a magnet chuck for adsorbing the non-circular can lid and rotating the non-circular can lid at high speed in a horizontal direction is provided (claim 2).

(3) In the vicinity of the feeding device for intermittently feeding the non-circular can lid, when the non-circular can lid is in a stationary state, the portion immediately above the peripheral portion of the periphery of the non-circular can lid is used as the winding portion. A sealing material injection nozzle for applying a sealing material having a large solid content ratio on the winding portion while projecting along the sealing portion is provided, and a central portion of the non-circular can lid is provided behind the sealing material injection nozzle. A magnet chuck for adsorbing the part and rotating the non-circular can lid at high speed in the horizontal direction is provided, and a magnet feed roller is provided above the magnet chuck, and the magnet chuck is above the magnet feed roller after the rotation stops. The non-circular can lid that has been attracted to the magnet chuck is attracted to the magnet feed roller by moving to the Apparatus for applying a sealant to the tightening portion of which is characterized by the non-circular can ends to be sent by (claim 3).

[0008]

[Action]

In the method of the first aspect, the sealing material injection nozzle applies a high-viscosity sealing material having a high solid content ratio and a low fluidity on the winding portion in a ridge shape. The high-viscosity sealing material applied in the form of a ridge on the wrapped portion does not spread to the required width of the wrapped portion as it is, not only does not exhibit a sufficient sealing effect, but also a sealing material in the drying process. It takes a long time to evaporate the water inside. According to the method of claim 1, after the sealing material is sprayed onto the tightened portion by the sealing material spraying nozzle, the non-circular can lid is horizontally moved around the center of the non-circular can lid. By rotating at a high speed in the direction, the slightly fluid sealing material applied in the form of a ridge is spread outward by centrifugal force, so that the sealing material is uniformly applied in a belt shape of a required width. ing. By spreading the sealing material in a band shape on the wound portion, the sealing effect of the wound portion can be enhanced. In addition, since the sealing material used is a high-viscosity material having a high solid content ratio and a low water content from the beginning, the applied sealing material is spread in a belt shape, The obtained sealing material can be dried at a low temperature of about room temperature and in a short time. As described above, for example, in the case where the sealing material is a rubber-containing sealing compound, an elastic coating film is formed on the wound portion of the periphery of the non-circular can lid, and the sealing material is a material containing an adhesive or an adhesive. An adhesive coating film is formed on the periphery of the non-circular can lid.

[Claim 2] In the apparatus according to claim 2, the non-circular can lid is intermittently fed by the feeding device.
A sealing material injection nozzle disposed near the feeding device applies a high-viscosity sealing material having a high solid content ratio on the winding portion of the non-circular can lid in a ridge shape. The high-viscosity sealing material applied in the form of a ridge on the wrapped portion does not spread to the required width of the wrapped portion as it is, not only does not exhibit a sufficient sealing effect, but also a sealing material in the drying process. It takes a long time to evaporate the water inside.
Thus, in the apparatus of claim 2, the non-circular can lid on which the application of the sealing material has been completed is further fed by the feeding device, and the center of the non-circular can lid is sucked by the magnet chuck, and the non-circular can lid is horizontally moved. It is rotated at high speed in the direction. That is, the magnet chuck rotates at a high speed in the horizontal direction with the central portion of the non-circular can lid being sucked. When the non-circular can lid is rotated at a high speed in the horizontal direction, the slightly fluid sealing material applied in the form of a ridge expands outwardly into a band having a required width by centrifugal force. By spreading the sealing material in a band shape on the wound portion, the sealing effect of the wound portion can be enhanced. Subsequently, the sealing material stretched in a band shape around the tightened portion is appropriately dried. The sealing material used is of a high viscosity having a large solid content ratio and has a low water content from the beginning, so that the applied sealing material is stretched in a band shape, and the sealing material is applied. The sealing material can be dried at a low temperature of about room temperature and in a short time. As described above, for example, in the case where the sealing material is a rubber-containing sealing compound, an elastic coating film is formed on the wound portion of the periphery of the non-circular can lid, and the sealing material is an adhesive or a material containing an adhesive. An adhesive coating film is formed on the periphery of the non-circular can lid.

[0010] The apparatus of claim 3 is the apparatus of claim 2, wherein a magnet feed roller is disposed above the magnet chuck. After the magnet chuck stops rotating, the magnet chuck rises while adsorbing the non-circular can lid and reaches the level of the magnet feed roller, and the non-circular can lid adsorbed on the magnet chuck contacts the magnet feed roller. Adsorbed to the magnet feed roller. When the magnet chuck moves further upward than the magnet feed roller, the non-circular can lid separates from the magnet chuck and is sent by the magnet feed roller. Subsequently, the magnet chuck descends and sucks the next non-circular can lid.

[0011]

Next, embodiments of the present invention will be described with reference to the accompanying drawings.

First, a method of applying a sealing material to a tightened portion of a non-circular can lid will be described. In the method according to the present invention, the non-circular can lid 11 is supported in a stationary state, and the non-circular can lid 11 is placed just above the cinching portion 13 around the periphery of the non-circular can lid 11.
After the sealing material 17 is sprayed onto the tightened portion 13 by the sealing material spraying nozzle 15 moving along 3,
In that the sealing material 17 is dried,
It is the same as the conventional method.

In the method according to the present invention, the sealing material injection nozzle 15 applies a high-viscosity sealing material 17 having a large solid content ratio onto the winding portion 13 in a ridge shape (FIG. 3 (1)). )). The sealing material 17 has a very low fluidity and a high viscosity, for example, having a solid content of 70% or more. After a high-viscosity sealing material 17 is applied in a ridge shape on the winding portion 13, the non-circular can lid 1 is rotated around the center 11 a of the non-circular can lid 11.
1 is rotated at a high speed in the horizontal direction to expand the sealing material 17 applied in the form of a ridge into a belt-like shape including the curled edge portion 13a of the tightening portion 13 (FIG. 3).
(2)). Subsequently, the sealing material 17 is dried at a low temperature of about room temperature in the factory and in a short time. From the above,
Non-circular can lid 1 Sealing coating 1
7 'is formed (FIG. 3 (3)). Thereafter, the tightening portion 13 around the periphery of the non-circular can lid 1 is wound around the edge of the can body 9 (FIGS. 3 (4) and (5)).

Next, an apparatus for performing the above-described method of applying a sealing material to the tightened portion of the non-circular can lid will be described. Reference numeral 21 denotes a feeding device such as a feed chain for feeding the non-circular can lid 11 intermittently. In the vicinity of the feeding device 21, while the non-circular can lid 11 is in a stationary state, the ratio of the solid content while moving along the winding portion 13 immediately above the winding portion 13 around the periphery of the non-circular can lid 11 is adjusted. A sealing material spray nozzle 15 for applying a large, high-viscosity sealing material 17 on the winding portion 13 in a ridge shape is provided. Reference numeral 23 denotes a sealing material injection nozzle 15.
Reference numeral 25 denotes a support member for the sealing material injection nozzle 15 for supplying the sealing material 17 to the sealing material supply pipe.

The central portion 11a of the non-circular can lid 11 is sucked behind the sealing material injection nozzle 15, and
Magnet chuck 31 that rotates 1 at high speed in the horizontal direction
Is arranged. As an example, the magnet chuck 31 is configured such that a disc-shaped electromagnet 31a is attached to a vertical chuck shaft (rotating shaft) 31b.
It is attached to the lower end of. The magnet chuck 31 is driven by a driving means (not shown) to form the non-circular can lid 11.
Is rotated about 2 to 4 times at a speed of, for example, about 1,000 to 1,200 rotations per minute.

The magnet feed rollers 33, 33,... Are arranged above the magnet chuck 31, and the magnet chuck 31 moves above the magnet feed rollers 33, 33,. The non-circular can lid 11 that has been adsorbed on the magnet feed rollers 33, 33,.
, And the non-circular can lid 11 is fed by the magnet feed rollers 33, 33,. In FIG. 1, the vertical movement distance of the magnet chuck 31 is drawn large for convenience of explanation, but the vertical movement distance of the magnet chuck 31 is actually 1 for example.
Since it may be about 5 to 20 mm, at least about 100 non-circular can lids 11 can be processed per minute, for example.

[0017]

As described above, in the present invention, a high-viscosity sealing material having a large solid content ratio is applied in a protruding strip shape on the tightened portion of the non-circular can lid by the sealing material injection nozzle. By rotating the non-circular can lid in the horizontal direction at a high speed around the center of the non-circular can lid, the sealing material applied in the form of a ridge is stretched in a band shape of a predetermined width around the winding portion. ing. By spreading the sealing material in a band shape on the wound portion, the sealing effect of the wound portion can be enhanced. In addition, since the sealing material used is a high-viscosity material having a high solid content ratio and a low water content from the beginning, the applied sealing material is spread in a belt shape, The obtained sealing material can be dried at a low temperature of about room temperature and in a short time. Therefore, it is possible to significantly reduce costs in the drying process. Also,
The drying step becomes extremely easy, and the occurrence of the blowhole phenomenon is also prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an example of a method and an apparatus according to the present invention.

FIG. 2 is a sectional view showing an example of a non-circular can lid.

FIG. 3 is an explanatory view schematically showing a method and an apparatus according to the present invention.

FIG. 4 is an explanatory view schematically showing a conventional method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Non-circular can lid 3 Winding part 3a Curled edge 5 Sealing material injection nozzle 7 Sealing material 7 'Sealing film 9 Can body 11 Non-circular can lid 11a Central part 13 Winding part 13a Curled edge 15 Sealing material Injection nozzle 17 Sealing material 17 'Sealing coating film 21 Feeder 23 Sealing material supply pipe 25 Support member 31 Magnet chuck 31a Disc-shaped electromagnet 31b Chuck shaft 33 Magnet feed roller

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI B21D 51/30 B21D 51/30 ZE B65D 8/20 B65D 8/20 B

Claims (3)

[Claims] 1. A non-circular can lid is supported in a stationary state, and a sealing material is sprayed on a sealing material jet nozzle just above a winding portion at a peripheral edge of the non-circular can lid along the sealing portion. The method of drying the sealing material after spraying, wherein the sealing material spray nozzle applies a sealing material having a large ratio of a solid content on the winding portion in a ridge shape, and then the non-circular can lid By rotating the non-circular can lid at a high speed in the horizontal direction around the center of the sealing member, the sealing material applied in the form of a ridge is spread in a band shape around the winding portion, and then the sealing material is cooled at a low temperature and a short time. A method for applying a sealing material to a tightened portion of a non-circular can lid, characterized in that the sealing material is dried in a short time. 2. In the vicinity of the feeding device for intermittently feeding the non-circular can lid, the non-circular can lid is located just above the non-circular can lid at a position just above the periphery of the non-circular can lid along the winding portion. A sealing material spray nozzle for applying a sealing material having a large solid content ratio on the winding portion while projecting, is disposed, and a central portion of the non-circular can lid is provided behind the sealing material spray nozzle. An apparatus for applying a sealing material to a tightened portion of a non-circular can lid, wherein a magnet chuck for adsorbing the non-circular can lid and rotating the non-circular can lid at high speed in a horizontal direction is provided. 3. In the vicinity of the feeding device for intermittently feeding the non-circular can lid, the non-circular can lid is located just above the peripheral portion of the peripheral portion of the non-circular can cover when the non-circular can lid is stationary. A sealing material spray nozzle for applying a sealing material having a large solid content ratio on the winding portion while projecting, is disposed, and a central portion of the non-circular can lid is provided behind the sealing material spray nozzle. And a magnet chuck for rotating the non-circular can lid in a horizontal direction at a high speed is provided.A magnet feed roller is provided above the magnet chuck. After the magnet chuck stops rotating, it is located above the magnet feed roller. By moving, the non-circular can lid that had been attracted to the magnet chuck is attracted to the magnet feed roller, and the non-circular can lid was attracted by the magnet feed roller. An apparatus for applying a sealing material to a tightened portion of a non-circular can lid, wherein the sealing material is applied.