JPH0221932B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a lid for a paper cup-shaped package.

This type of package consists of a cup-shaped container made of paper and a lid made of a laminate film for sealing the opening of the container, and a drinking spout and a drinking mouth sealing film are attached to the lid.

However, conventionally, in order to manufacture the above-mentioned lid, as shown in Fig. 1, a spout a is first punched out from a laminate film f made of aluminum foil coated with resin, and then both sides of the small hole of the spout a are punched out. Since it is necessary to supply the resin film b for sealing and the aperture film c for removal at the time of opening separately from both the upper and lower sides of the film f and seal the film f with adhesive, not only can the manufacturing process not be simplified; It is necessary to prepare an opening film separately,
It was uneconomical.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lid manufacturing method that can simplify the manufacturing process and save the amount of film material used, in view of the problems of conventional lid manufacturing methods.

The method for manufacturing a cup-shaped container lid according to the present invention includes:
One side of a band-shaped aluminum foil in which small holes, which will serve as drinking spouts, are formed at predetermined intervals matching the punching intervals of the lid, is covered with a band-shaped resin film to cover one side of the small holes, and the resin film is covered with a band-shaped resin film. Punching out a small piece of film with an opening larger than the small hole from a position approximately halfway between the adjacent small holes of the film-covered aluminum foil and away from the position of the lid to be punched, on the opposite side of the resin film; moving the punched apertured film piece to the position of the small hole and sealing the other side of the small hole with the apertured film piece;
Thereafter, the lid is formed and punched out at a position including the small hole.

In the above structure, a base film is made by covering a belt-shaped aluminum foil with small holes in advance and covered with a belt-shaped resin film, and a small piece of the open film is punched out of the base film at a position away from the part where the lid is punched, and the punched-out film is punched out. Since the small piece of apertured film is directly moved to the position of the small hole and bonded to the aluminum foil at the position of the small hole, the manufacturing process of the lid can be simplified and the amount of lid film can be saved.

Embodiments of the present invention will be described below with reference to the drawings.

A first embodiment of the present invention will be described with reference to FIGS. 2 to 7.

In the lid forming method of the present invention, as shown in FIGS. 2 and 3, one surface of an aluminum foil 2 covered with a resin film 3 is used as a base film 1 for forming the lid.

Small holes 2a for drinking spouts are formed in advance at predetermined intervals in the aluminum foil 2 of the base film 1, and the small holes are covered by the resin film 3. Further, a mark m is formed on the side edge of the baize film 1 at a position corresponding to the small hole 2a, and this mark m is detected by a photoelectric detection device to detect the small hole 2a.
The position of the object can be detected indirectly.

The above-described base film 1 is produced by punching out the aperture film 4 at a position between adjacent small holes 2a using an aperture film punching and bonding device 10 configured as shown in FIGS. 4 and 5. The removed aperture film 4 is adhered to one side of the base film, that is, the surface on the aluminum foil 2 side, so as to close the small hole.

As shown in FIGS. 4 and 5, the aperture film punching and bonding device 10 includes a punching die that is attached to a main body 11 and has a punching hole 13 formed in a shape that matches the shape of the aperture film 4 to be punched. 12, and a punch 1 that punches out the apertured film 4 by being operated by a cylinder 16 attached to a support plate 15 fixed on the die 12 by a support shaft 14.
7, a slider 21 movably attached to a pair of guide rods 20 attached horizontally to the main body at the bottom of the punching die 12, and a pair of lifting shafts 22 fixed to the upper end of the pair of lifting shafts 22 attached to the slider 21 so as to be movable up and down. the suction head 23, which is movable up and down by a cylinder 25 at the bottom of the slider 21 and moves the lift shaft 22 up and down, and the top of the base film at a distance l from the punching die 12. It has a sealing stand 26 which is provided so as to be movable up and down.

The slider 20 is reciprocated along a guide rod between a position A directly below the punching die 12 and a position B directly below the sealing base 26 by a cylinder 27.
Thereby, the suction head 23 is moved back and forth between them. The distance l between positions A and B is approximately 1/2 the pitch p of the small holes 2a in the aluminum foil.

A roller 28 that can roll on a lift plate is rotatably attached to the lower end of the lift shaft 22.

A vacuum suction port 30 is formed in the suction head 23 and opens at the center of the top surface, and the suction port is connected to a vacuum source via a through hole 31 in a known manner. A heater 32 is embedded within the suction head to heat-seal the resin film portion of the open film 4 and the resin film 3 located in the small hole 2a, thereby joining them to each other.

In the aperture film punching and bonding device described above, the feeding of the base film 1 is intermittently stopped when the mark m reaches position B, and at that time, approximately the center between adjacent marks m or between the small holes 2a is located at position A. There is.

Thereafter, the punch is pushed down by the cylinder and cooperates with the punching die to punch out the apertured film 4. The punched aperture film 4 is attracted by the suction head and heated thereby.
Next, the suction/reverse adsorption head that suction-holds the apertured film 4 moves to position B together with the slider, and then rises due to the lift of the elevating plate by the cylinder.
The opening film 4 is heat-sealed to the base film (specifically, the resin film 3) at the position of the small hole 2a. During this heat sealing, slits 5 are formed on both side edges of the base film using a known slitting device.

Next, when the base film is intermittently moved by 2p pitch and the small hole 2a where the opening film 4 is heat-sealed reaches the position D, the convex portion 6 for the lid is formed by a known lid forming device (not shown). Shaped upwards. When the formed convex portion 6 further moves by a pitch p and reaches position E, the lid 7 is punched out at that position by a known punching device.

8 and 9 show a lid forming apparatus for carrying out another embodiment of the lid manufacturing method according to the present invention. This lid forming device 30 includes a turntable 31 that can be rotated intermittently, and film holders 3 mounted at equal intervals around the turntable.
2, an open film holding plate 33 provided movably in the radial direction at the bottom of the turntable 31 (at a position corresponding to each film holder 32), and a punching device 40 arranged around the turntable at predetermined intervals. , an adhesive device 45, a molding device (not shown) having a known structure, and a punching device (not shown) having a known structure.

A receiving hole 34 and a through hole 35 are provided at the tip of the holding plate 33.
is formed, and a roller 36 is attached to the rear end. This roller is placed in a groove 38 of a cam 37 provided annularly below the turntable, so that the deflection of the cam allows the holding plate to be moved in the radial direction.

A punching device 40 is provided at a position B' in FIG. 8, and is configured to punch out an open film 4' from a base film using a punch 43 operated by a punching die 41 and a cylinder 42.

The bonding device 45 is provided at position C' in FIG. This adhesive device includes a sealing base 46 that can enter into the through hole of the holding plate 33 and is operated by a cylinder 47, and a cylinder 49 that pushes up the open film 4' in the holding plate 33 and presses up the pushing rod. 48 to adhere the apertured film 4'.

In the above configuration, the tip of the base film 1 shown in FIGS. 2 and 3 is held by the film holder 32 at position A', and then a cutter (not shown) is used.
Cut it to a predetermined length. Next, the turntable is rotated intermittently and the cut base film 1' is sent to position B', and the punching device 40 punches out the aperture film 4' from the tip of the base film, and the punched aperture film is attached to the holding plate. It is placed on 33.

Thereafter, when the turntable rotates intermittently, the holding plate 33 is moved radially inward, and the opening film in the receiving hole 34 is positioned with the small hole 2a of the base film. Then, the push-up rod 48 of the adhesive device 45 rises and presses the apertured film 4' against the bottom surface of the base film, and the sealing stand 46 descends and hits the top surface of the base film, and both work together to push the apertured film 4' onto the base film. Heat seal the film.

According to the lid manufacturing method of the present invention, a base film is made by covering a belt-shaped aluminum foil in which small holes are formed in advance with a belt-shaped resin film, and a small piece of the open film is removed from the part of the base film from which the lid is punched. At the same time, the punched opening film piece is moved directly to the small hole position and bonded to the aluminum foil at the small hole position, which simplifies the manufacturing process for this type of lid. It can be made cheaper than conventional methods. Furthermore, since a part of the base film that was conventionally discarded can be used as apertured film pieces, the film material can be saved and manufacturing can be carried out using conventional materials. Therefore, the economic effects of both are extremely large.

Note that the position where the through-hole film is punched out may not be at the center of the base film as in this embodiment, but may be offset to one side edge. In this way, the pitch between the small holes in the base film can be slightly reduced, and the base film can be saved accordingly.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a conventional lid manufacturing method, FIG. 2 is a perspective view of a base film used in the lid manufacturing method according to the present invention, FIG. 3 is a sectional view of the base film in FIG. The figure is a perspective view of an aperture film punching and bonding device used in the method of manufacturing a lid according to the present invention, FIG. 5 is a sectional view of the device shown in FIG. 4, and FIGS. Diagrams showing the process,
FIG. 8 is a schematic plan view of an apparatus for carrying out another embodiment of the method for producing a lid according to the present invention, FIGS. It is a partially enlarged view of the figure. 1: Base film, 2: Aluminum film, 2a: Small hole, 3: Resin film, 4: Opening film.

Claims (1)

[Claims] 1. Cover one side of a strip-shaped aluminum foil with small holes that will serve as drinking spouts at predetermined intervals that match the punching intervals of the lid, and cover one side of the small holes with a strip-shaped resin film. Punching out a small piece of film with an opening larger than the small hole on the opposite side of the resin film from a position approximately halfway between the adjacent small holes of the aluminum foil covered with the resin film and away from the position of the lid to be punched. , moving the punched small opening film piece to the position of the small hole, sealing the other side of the small hole with the small opening film piece, and then forming and punching out the lid at the position containing the small hole. A method for producing a lid for a cup-shaped container, characterized by: