JPS59106930A - Method and apparatus for preparing lid with opening piece - Google Patents

Abstract

PURPOSE:To prevent the generation of opening inferiority, by a method wherein the inner surface of an opening piece contacted at the orifice part of a lid material and the outer surface of the thermoplastic resin layer formed to the inner surface of the lid material are partially bonded under relatively high pressure and, thereafter, the entire inner surface of the opening piece and the outer surface of the lid material are bonded so as to leave a tab part. CONSTITUTION:In a primary bonding apparatus 3, the protruded part 17 of a seal head 9 presses the outer surface (a b-place) of an openng piece 2 nearer to a tab part 21 and the polyethylene 22 provided to the inner surface of the opening piece 2 and the OP varnish 30 provided to the outer surface of a lid material 2 are bonded in the range of an oblique line part while the inner surface of the opening piece 2 and the polyethylene 19 provided to the inner surface of the lid material 1 are bonded at the place C of an orifice 20. In a secondary bonding apparatus 4, a seal head 13 presses the lid material 1 and the opening piece 2 so that the Teflon tape 26 on a seal receiving table 14 and the primarily bonded place (c) are not superposed and the polyethylene 22 provided to the inner surface of the opening piece 2 and the polyethylene 19 provided to the inner surface of the lid material 1 are bonded in a range (e).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a lid with an opening piece for opening the drinking spout of a cup-shaped container, etc., and an apparatus used therein. An object of the present invention is to provide a method for manufacturing a lid, which is characterized by completely adhering a portion where opening failure is likely to occur due to poor adhesion with the resin on the inner surface covered by the holes, and an apparatus used therein.

Conventionally, when manufacturing this type of lid with an easy-to-open lid,
As shown in Fig. 1, a roll-shaped lid material (1) with holes formed in advance and a thermoplastic synthetic resin laminated on one side and a roll-shaped opening piece (2) are placed in the direction of the arrow in the figure. (3) in Figure 1
At the position shown in FIG. 2, first adhere the opening piece (2) and the laminated polyethylene (6), etc. in FIG. 1. Next, at position (4) in FIG.

The outer surface of the lid (1) and the inner surface of the opening piece (2), including the areas where the first bonding was performed, are entirely bonded in a second step, leaving only the knob part. At the point where the primary bonding is to be performed, as shown in Figure 2, the lid material (1) and the opening piece (2) are sandwiched between them, and the lower seal holder (seal head rl relative to 75) is lowered to remove the opening piece. (2) The outer surface is pressed; (1) Usually, the lid material (1) is made of aluminum or the like with a thickness of 60 to 150 μm.

There is a step at the end (al) of the hole (8). Therefore, when the seal head (7) is suppressed, the pressure is applied to the lid material (
11 and the opening piece (2), and the lid material (1
) The thermoplastic synthetic resin (6) on the inner surface and the thermoplastic synthetic resin (221) on the inner surface of the opening piece (2) do not adhere completely, and even if you pull the opening piece (2) when opening, the thermoplastic synthetic resin (6)
) peels off from the opening piece (2) and remains on the inner surface of the hole (8) of the lid (1), resulting in the problem that the seal is not opened or is opened insufficiently.

The present invention was conceived to solve the above problems, and will be described in detail below based on embodiments shown in the drawings.

First, to explain the manufacturing method of the present invention, the overall process flow is as shown in Figure 1, similar to the conventional method. Lid material (1) for the certificate.

The rolled-up opening piece (2) is flowed in the direction of the arrow in the figure, and the primary adhesive device (3) bonds the inner surface of the opening piece (2) that contacts the hole in the lid (1) with the lid (11). The inner thermoplastic synthetic resin layer and the outer surface are partially relatively strongly adhered for the first time, and then the second adhesion device (4) is used to create a trigger when the package is opened, including the area where the first adhesion was made. The entire inner surface of the unsealing piece and the outer surface of the lid are bonded in a second and third step, leaving the knob part, and then the punching/forming machine (5
1, it is sufficient to punch out the desired shape and size from the rolled state.

Here, the primary bonding device (3) and the secondary bonding device (4) will be explained in detail based on FIGS. 3 to 6.

First, to explain the primary adhesive device (3) using FIG. 3, with the lid material (11 and the opening piece (2) interposed between them, A seal head (9) having a convex portion αn made of a material with excellent thermal conductivity such as a copper alloy, and a seal pedestal aI having a substantially smooth surface facing each other below the lid member (1). It is arranged.

In addition, the seal head (9) and seal pedestal a (Il) are equipped with a heater (ill (1fi) and a cooling channel (121f), respectively.
i5 is built in, or a heater (instead of built-in IlHIfl, another heat source (not shown) is connected to K. Next, the secondary bonding device will be explained using FIG. 4.

Similarly, for the secondary adhesive device (4), the opening piece (2)
The seal head α3 is arranged above the seal head α3, and the seal pedestal a] is arranged below the lid member (1) so as to face each other, and the seal 4
- Head +131. Each seal pedestal (14) has a built-in heater F15) (one cooling water channel), but instead of having a built-in heater (15) Q□□□, another heat source (not shown) is used. connected.

Next, the operating state of each device will be explained.

First, a roll of lid material (1) and opening piece (2) are sent to the primary bonding device (3), and are placed on aluminum foil (polyethylene on the inner surface marked with l) at the position shown in Figure 3. When the hole (A) of the lid material (1) laminated with 19 is located, the lid material (11,
The feeding of the opening piece (2) stops intermittently, and the polyethylene (22
1 and the polyethylene (19) on the inner surface of the lid (11), the seal head (91) is lowered to adhere the polyethylene (19) on the inner surface of the lid (11) at approximately the half of the side near the knob (211), and the convex surface is brought into contact with the outer surface of the unsealing piece (2). At this time, in the first bonding step, the convex portion αη of the seal head (9) is formed as shown in FIG.

At the location where the inner surface of the unsealing strip (2) and the polyethylene 4 on the inner surface of the lid (1) face each other, press the outer surface of the unsealing strip (2) (the location shown in (b) in FIG. 5), and press the diagonal line in FIG. In this area, the polyethylene (221) on the inner surface of the opening piece (2) and the OP varnish C30 on the outer surface of the lid (1) are glued together, and the polyethylene (11) on the inner surface of the opening piece (2) and the inner surface of the lid (1) are glued together. Glue CI!41 at the (cl) point of the hole QQI (in this case, use Teflon seam as shown in the drawing).
Similarly, the Teflon sheet (
2), and after heating and pressurizing the opening piece (2) and the lid material (1) to thermally bond the opening piece (2) and the lid material (1), the seal head (9) and seal holder 00) are attached to the opening piece (2) and the lid material. Make sure to move away from (1) smoothly.

In addition, in the secondary bonding process, as shown in FIG. 4, the position (c) of FIG.
When the lid material (1) and the unsealing piece (2) that have been primarily glued are sent to you, place Teflon tape (a) on the top surface so that it does not overlap with the part that was first glued (cl). When the cover material (1) and the opening piece (2) are located between the provided seal pedestal (1a) and the seal head (+31), the seal head (+31) descends and the seal pedestal (14) Press the lid material (1) and the opening piece (2) between the
221 and the polyethylene Ql on the inner surface of the lid.

In addition, even in the secondary bonding device (4), the primary bonding device (3) is attached to the seal head (+31. seal pedestal 04).
Similarly, as shown in Figure 4, each Teflon sheet (
27) Cover with +28) and open the unsealed piece (2) after gluing.
, the releasability from the lid material (1) should be good.

The present invention has the above configuration.

Conventionally, when the opening piece is pulled during opening, it is easy to open the lid and the opening piece easily due to poor adhesion between the polyethylene on the inside of the opening piece and the polyethylene on the inside of the lid. Since the two pieces are strongly bonded in two steps, it is possible to manufacture a lid with an easy-to-open piece that is easy to open.

Moreover, in the second adhesion process, the Teflon tape (20) is pressed at a position that does not overlap with the first adhesion and is strongly adhered, so air pockets between the opening piece and the lid material are prevented from forming as in the conventional case. It occurs almost constantly, without scattering, and with a length of 1 to 2 cm at the position shown in (f) in Figure 6. Therefore, as in the conventional case, the polyurethane on the inner surface of the lid material when opened is caused by scattered air pockets. 7- Since the area where ethylene remains is reduced to a minimum, the drinking spout is formed with approximately the same area as the hole, making it easy to apply to containers that are easy to serve for eating and drinking, and providing a good-looking lid.

Also, as a device, in the primary bonding device.

Since the lower end of the seal head (9) is provided with a protrusion made of gunmetal material with excellent thermal conductivity, it is possible to completely bond the opening piece and the lid material in areas where bonding failures tend to occur in the past. , when you pull up the opening piece, the lid material polyethylene (I
To provide a lid that can be torn and always be completely opened.

In addition, in the above explanation, the height of the convex portion αη in FIG. If this is the case, there are disadvantages in that wrinkles will occur in the unsealed piece, large air pockets will be generated due to the secondary adhesion, and the locations where air pockets will occur will vary.

Using a lid manufactured by conventional manufacturing means and a lid manufactured according to the present invention, a container as shown in FIG. After cooling to
The following good results were obtained.

Note that the lid material (1) is OP varnish/aluminum/ionomer/polyethylene from the side in contact with the opening piece.

The opening piece (2) used had a layered structure of aluminum/polyethylene/ethylene-vinyl acetate copolymer from the side in contact with the lid material.

Fairly poor: Hole (A) is opened only to a size of %. Poor condition: Hole (A) is opened to a size of less than %. Good condition: Hole ■ is completely opened.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing the manufacturing process of the present invention and the conventional manufacturing process;
FIG. 2 is a side view showing a conventional primary bonding device, FIG. 5 is a side view showing the primary bonding device of the present invention, and FIG. 4 is a side view showing the secondary bonding device. FIG. 5 is an explanatory plan view showing the state of primary adhesion. FIG. 6 is an explanatory plan view showing the state of secondary adhesion. (11...Lid material (2)...Opening piece (3)...
Primary bonding device (4)...Second bonding device (5)・
... Punching/forming equipment (6) α9 (221@-... Polyethylene (181 (23)... Aluminum (7
1 (91 (13I... Seal head (/Y (10
) (+41...Seal holder (8) (201...
・Hole Qll flit (+61 r+r!l...
Cooling water channel (121(+21(t5) (155・)i
- Tar (17)...Convex part (21)...Knob part
CI'41 (2ω(2η(281-...Teflon sea) <261...Teflon tape (A)ri3■
...OP varnish patent applicant Toppan Printing Co., Ltd. Representative Kazuo Suzuki (1 other person) Figure 2 11-

Claims (2)

[Claims] (1) A thermoplastic synthetic resin layer is provided on the inner surface of the lid material, which has a hole for drinking and has a thermoplastic synthetic resin layer on the side that is bonded to the container opening, to cover the hole, and further covers the hole. A method for producing a lid, comprising: providing an opening piece to cover the material from the outside; and adhering the opening piece to a thermoplastic synthetic resin layer on the inner surface of the lid material at the hole portion, the method comprising: The first adhesion step involves relatively strongly adhering the inner surface of the unsealed piece and the outer surface of the thermoplastic synthetic resin layer on the inner surface of the lid material, which are in contact with each other. A method for producing a lid with an opening piece, comprising a second adhesion step of bonding the entire inner surface of the opening piece and the outer surface of the lid material, leaving only a portion. (2) A thermoplastic synthetic resin is provided on the inner surface of the lid material, which has a hole for drinking and has a thermoplastic synthetic resin layer on the side that is bonded to the container opening, and the hole is further bonded to the lid material. An apparatus for producing a lid comprising: providing an opening piece to cover from the outside of the lid, and bonding the opening piece to a thermoplastic synthetic resin layer on the inner surface of the lid at the hole portion, the lid manufacturing device comprising: Primary adhesion that includes a seal head having a convex portion on the contact surface between the thermoplastic synthetic resin layer on the inner surface of the lid material and the outer surface of the opening piece, and a seal pedestal that faces the seal head with the lid material in between. and adjacent the secondary bonding device. A loop that touches almost the entire surface except for the knob on the outside of the front opening piece.
- A manufacturing device for a lid with an opening piece, comprising a seal head and a secondary adhesion device including a seal pedestal facing the seal head with a lid material interposed therebetween.