JP5394022B2 - Method for manufacturing container cap - Google Patents

Description

The present invention relates to a cap for a container capable of maintaining a good appearance, and in particular, is attached to a mouth portion of a container filled with contents such as powdered food, and an opening hole for discharging the contents is easily peeled off. those concerning the manufacturing method of the cap which is sealed with a sealant.

  2. Description of the Related Art Conventionally, a lid attached to a mouth portion of a container is used in which an opening for discharging contents is sealed with a tape-like sealing material.

  An example of such a lid is described in Patent Document 1. In Patent Document 1, a coating film layer is formed on both surfaces, and a metal can lid having an opening formed in advance, and the opening is formed on the outer surface side of the can lid from above the coating film layer. An easily openable can lid comprising a cover and an easily opened peelable piece adhered so as to be in close contact with the periphery of the opening, wherein the openable piece is a thermoplastic resin at least on the side facing the outer surface of the can lid And the thermoplastic resin layer covers the cut end face of the opening, and also covers the coating film layer on the inner side of the can lid at the periphery of the opening, and the inner side of the can lid It is described that it is adhered to the coating film layer.

JP 2000-190964 A

  In the can lid described in Patent Document 1, when the open piece is bonded to the peripheral portion of the opening of the can lid, the air existing between the open piece and the peripheral portion of the opening cannot be sufficiently removed. If the unsealed piece and the peripheral part of the opening are bonded in a state, an air layer is formed between the unsealed piece and the peripheral part of the opening, and the unsealed piece partially rises, which may impair the appearance of the lid. .

The present invention has been made circumstances described above as a background, the purpose of providing a seal member and the panel portion without any gap so close contact, a method of manufacturing a cap which can be easily prevented from impairing the appearance by the air layer It is what.

In order to achieve the above object, the invention of claim 1 includes a panel part in which a discharge hole for contents is formed, and a locking part connected to the peripheral part of the panel part and locked to the container mouth part. If, projecting in the manufacturing method of a container cap having a peel easily seal member for sealing said discharge hole, said panel portion has elasticity, and upward toward the center portion than front Symbol periphery The sealing member is disposed on the central portion of the panel portion, and is sandwiched between an upper die and a lower die having a flat molding surface, and the upper die adhesive gradually before Symbol seal member toward the periphery from the front Symbol central portion of the sealing member with the depression of by abutting on said die, said seal member entirely on the panel portion It is characterized by sealing the pre-Symbol discharge hole by It is a manufacturing method.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the panel portion is formed in an elastically deformable dome shape.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, an adhesive layer is formed on the entire lower surface of the seal member, and the seal member is bonded to the panel portion entirely by the adhesive layer. It is characterized by that.

  According to the first aspect of the present invention, the panel portion is formed such that the central portion protrudes upward rather than the peripheral portion, so that the upper mold and the lower mold having flat surfaces are opposed to each other. Even when the panel portion and the sealing member are sandwiched between and the sealing member is bonded to the panel portion, the sealing member can be pressed against the panel portion in order from the central portion of the panel portion. Therefore, the air that was interposed between the panel part and the sealing member can be reliably pushed out from the center part of the panel part to the peripheral part with simple equipment, and the panel part and the sealing member can be brought into close contact with no gap. Can do. As a result, since it can adhere | attach without interposing an air layer between a panel part and a sealing member, it can prevent that an appearance is impaired.

  According to the invention of claim 2, in addition to the same effect as that of the invention of claim 1, the panel portion is formed in an elastically deformable dome shape. When the panel part and the seal member are sandwiched between and the panel part is bonded to the seal member, the air that was interposed between the panel part and the seal member while elastically deforming the panel part with the upper mold Can be extruded from the central part of the panel part to the peripheral part. Therefore, air can be smoothly evacuated, and the appearance of the shape of the panel portion after the sealing member is bonded can be improved.

  According to the invention of claim 3, in addition to the effect similar to the effect of the invention of claim 1 or claim 2, the adhesive layer is formed on the entire lower surface side of the seal member, and the seal member is entirely applied to the panel portion. Since the air can be prevented from entering between the panel portion and the sealing member after the sealing member is adhered to the panel portion, the appearance can be prevented from being deteriorated due to the air layer. .

  Specific examples of the present invention will be described below with reference to the drawings. FIG. 1 shows a vertical end view of a powder food cap 1 according to the present invention. The cap 1 is a metal cap 1 attached to the mouth of a container 2 filled with powdered food such as pepper, and is composed of a metal cap shell 3 and a seal member 4 mainly composed of metal foil. Yes.

  The cap shell 3 is obtained by press-molding a metal sheet material obtained by applying a synthetic resin protective coating such as a coating film or a resin film on a known metal plate for containers such as an aluminum alloy plate or a surface-treated steel plate. . In addition, an epoxy resin, a polyester-type resin, etc. can be used suitably for the resin material which comprises the synthetic resin protective film as a resin coating material. In addition, as the resin film, olefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate, and the like can be suitably used.

  FIG. 2 shows a top view of the cap shell 3. The cap shell 3 has a panel portion 6 in which a discharge hole 5 for contents is formed, and a locking portion 7 connected to the outer peripheral edge of the panel portion 6 and locked to the mouth portion of the container 2. Yes.

  The locking portion 7 is connected to the outer peripheral edge portion of the panel portion 6, and has a raised portion 8 formed so as to protrude upward from the outer peripheral edge portion of the panel portion 6 with an arc-shaped longitudinal section, and a lower end of the raised portion 8. And a skirt portion 9 extending downward along the central axis direction of the cap.

  The upper end of the raised portion 8 is formed so as to be positioned above the upper end of the panel portion 6, and the inner surface side of the raised portion 8 has an annular groove shape, and the annular groove portion 10 includes the container 2. A sealing material made of a soft synthetic resin (not shown) capable of sealing the mouth is provided.

  The panel portion 6 is formed in a thin plate shape so as to cover the opening of the container 2 continuously to the inner peripheral edge of the locking portion 7, has a circular arc shape with a continuous vertical section, and the center portion is higher than the peripheral portion. It is formed in a dome shape that can be elastically deformed so as to protrude. The panel portion 6 is formed such that a plurality of discharge holes 5 are arranged at positions corresponding to the vertices of the regular pentagon at a predetermined distance from the center portion of the panel portion 6.

  Although not shown, the sealing member 4 is easily peeled by laminating a base material layer made of a metal foil such as an aluminum foil and a heat sealable sealant or adhesive on the entire lower surface of the base material layer. It is comprised from the sheet-like laminated material which has an adhesive layer.

  FIG. 3 shows a top view when a seal member is bonded to the cap 1. The seal member 4 includes a knob portion 11 in which a part of the peripheral portion is folded upward and a sealing portion 12 that is in close contact with the panel portion 6, and the sealing portion 12 is the panel portion 6 of the cap shell 3. Is adhered to the entire upper surface of the substrate so as to seal the discharge hole 5. Note that the overall adhesion referred to here means adhesion of the entire upper surface of the panel portion in a range positioned inward in the cap radial direction from a position positioned in the outermost outer periphery in the cap radial direction in at least a plurality of discharge holes. It is. In other words, the entire upper surface of the panel unit 6 is covered with the sealing member 4 and all the discharge holes 5 provided in the panel unit 6 are bonded in a sealed state.

When manufacturing the cap 1 of the present invention, the sealing member 4 is disposed on the upper surface of the panel portion 6 of the cap shell 3 press-molded from a thin metal plate material, and the sealing member 4 and the panel portion 6 are connected to the upper mold and the lower mold. The sealing member 4 is adhered by being sandwiched and molded with a mold. The molding surfaces of the upper mold and the lower mold are formed as flat surfaces extending in the radial direction of the cap 1. Moreover, the panel part 6 of the cap shell 3 is formed so that a center part may protrude upwards rather than a peripheral part. Therefore, in a state where the cap shell 3 is disposed on the lower mold, a gap is left between the lower surface of the central portion of the panel portion 6 and the molding surface (upper surface) of the lower mold. Here, when the upper die is pushed down and the seal member 4 and the panel portion 6 are sandwiched between the dies, the portion of the seal member 4 that is disposed on the center portion of the panel portion 6 is the upper portion. mold abuts, then brought elastically flexures Masa downward by depressing the seal member 4 and the panel 6 Togaue mold. That is, the upper mold gradually comes into contact with the peripheral part from the central part of the seal member 4, and finally, the entire upper surface of the seal member 4 comes into contact with the upper mold. In this way, the seal member 4 is adhered to the entire surface of the panel portion 6.

  As a result, the air existing between the seal member 4 and the panel portion 6 moves so as to be pushed out from the central portion of the seal member 4 toward the peripheral portion, and is discharged from the peripheral portion of the seal member 4. The sealing member 4 and the panel portion 6 can be brought into close contact with each other without a gap. The panel portion 6 released from being sandwiched by the mold is elastically deformed and restored to the original dome shape.

  FIG. 4 shows a longitudinal sectional view when the cap 1 is attached to the container 2. Such a container 2 to which the cap 1 of the present invention is attached is a metal thin film in which a protective film made of a synthetic resin such as a coating film or a resin film is applied to a known metal plate for a container 2 such as an aluminum alloy plate or a surface-treated steel plate. The plate material is formed into a bottomed cylindrical shape by squeezing and ironing or impact molding, and a curled portion is formed by rounding the opening end outwardly at the opening. When the cap 1 of the present invention is attached to such a container 2, the sealing material (not shown) of the locking portion 7 of the cap shell 3 is brought into close contact with the curled portion of the container 2 while the skirt portion 9 of the locking portion 7 is in contact. The lower end is locked by drawing so as to follow the shape of the lower surface of the curled portion.

  The container 2 to which the cap 1 of the present invention is attached is not limited to a metal container, and may be a glass container or a synthetic resin container. More preferably, in consideration of the recyclability of the container 2, it is desirable to use a metal container 2 like the cap 1.

  According to the cap 1 of the present invention as described above, the panel portion 6 is formed so that the center portion protrudes outside the container 2 along the central axis rather than the peripheral portion, so that the opposing surface is formed. Even when the panel part 6 and the seal member 4 are sandwiched between the flat upper mold and the lower mold and the seal member 4 is bonded to the panel part 6, the seal member 4 in order from the center of the panel part 6. Can be pressed against the panel portion 6. Therefore, the air that has been interposed between the panel portion 6 and the seal member 4 can be reliably pushed out from the central portion of the panel portion 6 to the peripheral portion with simple equipment, and the panel portion 6 and the seal member 4 can be Can be in close contact with no gap. As a result, since it can adhere | attach without interposing an air layer between the panel part 6 and the sealing member 4, it can prevent that an appearance deteriorates.

  Further, since the panel portion 6 is formed in an elastically deformable dome shape, the panel portion 6 and the seal member 4 are sandwiched between the upper die and the lower die, and the panel portion 6 is attached to the seal member 4. When adhering, the panel portion 6 is elastically deformed by the upper mold, and the air existing between the panel portion 6 and the seal member 4 is pushed out from the central portion of the panel portion 6 to the peripheral portion. Can do. Therefore, air can be smoothly evacuated, and the shape of the panel portion 6 after the sealing member 4 is bonded can also be improved in appearance.

  Further, since the adhesive layer is formed on the entire lower surface of the seal member 4, the seal member 4 is adhered to the panel portion 6, and after the seal member 4 is adhered to the panel portion 6, the panel Since air can be prevented from entering between the portion 6 and the seal member 4, it can be prevented that the appearance deteriorates due to the air layer.

It is an enlarged vertical end view of the cap for powdered food which concerns on this invention. It is a top view of the cap shell in this invention. It is a top view at the time of adhere | attaching a sealing member on the cap for powdered food which concerns on this invention. It is a longitudinal cross-sectional view which shows the container mounting state of the cap for powdered food which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Cap, 2 ... Container, 4 ... Sealing member, 5 ... Discharge hole, 6 ... Panel part, 7 ... Locking part.

Claims (3)

A panel portion in which the discharge holes for the contents are formed, a locking portion connected to the peripheral portion of the panel portion and locked to the container mouth portion, and an easily peelable sealing member for sealing the discharge holes In the manufacturing method of the container cap having,
The panel portion has elasticity, and is formed as towards the middle than before Symbol periphery is protruded upward, the sealing member is disposed on the central portion of the panel portion , sandwiched by the upper mold and lower mold molding surface is a flat surface it gradually before Symbol seal before Symbol central portion toward the peripheral portion of the sealing member with the depression of the upper die by abutting the member on said mold, a manufacturing method of a container cap, which comprises sealing the sealing member to wholly bonded allowed by prior Symbol discharge hole in the panel.
The panel unit manufacturing method of the container cap according to claim 1, characterized in that it is formed in an elastically deformable dome-shaped. The container cap according to claim 1 or 2, wherein an adhesive layer is formed on the entire lower surface of the seal member, and the seal member is bonded to the panel portion entirely by the adhesive layer. Manufacturing method.

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