JPH035983B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing an easy-to-open container lid.
More specifically, the present invention relates to a method for manufacturing a container lid which is opened by peeling off an opening tension piece covering the opening.

(Prior art) One type of container lid that is easy to open is a container lid member made of metal with an opening in advance and an opening tension molded with easily peelable aluminum foil or plastic material to cover the opening. It is known that the pieces are glued together. This type of container lid is different from other types, for example, by fixing a tab to an opening defined by a line of weakness formed in a container lid member made of metal, and then pulling the tab to break the line of weakness. Compared to open containers, this method is superior in that it does not cause problems such as the broken portion of the container lid member being improperly discarded and causing cuts to people.

FIG. 1 shows an example of an easy-to-open container lid 1 which covers an opening 2 and has an opening tension piece 3 bonded to the outer surface. In the conventional manufacturing method of this type of container lid 1, first, a flange 6 is formed on the periphery via a rising portion 5.
A dish-shaped lid member 4 having a shape is formed, and then an opening 2 of a predetermined shape is punched out or the like, and then an opening tension piece 3 formed in a predetermined shape is press-bonded to cover the opening 2. It is carried out by

An opening tension piece 3 covers the opening 2 of the lid member 4.
The method of press-bonding the opening tension piece 3 is based on the fact that the opening tension piece 3 is soft and thin as described above, and since the lid member 4 has a rising part 5, the part to which the opening tension piece 3 is attached is a recessed part. Due to certain reasons, it requires a high degree of skill to properly attach the opening tension piece 3.

In addition, the work of pasting the opening tension piece 3 and the work of pasting a synthetic resin film on the inner surface of the lid member 4 to cover the cut edge of the opening 2 and its vicinity must be performed with accurate positioning. The disadvantage is that it is difficult to For this reason, the adhesion position of both may shift from the predetermined position or the adhesion may be defective, causing the opening 2
In some cases, poor sealing of the opening 2 or exposure of the cut edge of the opening 2 may occur, and in order to prevent this, advanced manufacturing technology is required, and the increased number of steps hinders efficient production. .

(Problems to be Solved by the Present Invention) The present invention eliminates such inconveniences, allows the opening tension piece to be efficiently and reliably attached to the opening of the container lid, and allows continuous mass production of container lids that are easy to open. The purpose is to provide possible manufacturing methods.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a lid member having an opening, and an easily peelable material provided on the outer surface of the lid member so as to cover the opening. A method for producing an easy-to-open container lid comprising an opening tension piece, the method comprising: continuously forming a long lid member forming material in which a large number of openings are arranged in the longitudinal direction at predetermined intervals; The opening tensile piece forming material that can be heat bonded is continuously supplied so as to cover each opening on the surface of the lid member forming material that will become the lid outer surface, and the opening tensile piece forming material is attached to the lid. Continuously supplying a synthetic resin film that is heat-pressed and releasably adhered to the member molding material and can be heat-adhered to the inner surface of the lid of the lid member molding material so as to cover the opening; The opening is sealed by heat-pressure welding the lid member molding material and the opening tension piece molding material covering the opening to seal the opening, and further the opening tension piece molding is bonded to the lid member molding material. A score line in the shape of the opening tension piece is made around the opening of the material, and the material for forming the opening tension piece is peeled off from the material for forming the lid member, leaving a portion surrounded by the score line, and then It is characterized in that the lid member is formed into a container lid by punching or the like.

(Function) The present invention provides each opening of the lid member molding material by supplying the opening tension piece molding material along the outer surface of the lid member molding material in which the openings are formed, by the method described above. It is possible to position the opening tension piece molding material accordingly. Then, by heat-pressing the material for forming the opening tension piece to the material for forming the lid member, it becomes possible to bond the material for forming the opening tension piece so as to cover each opening.
On the other hand, by supplying the synthetic resin film along the inner surface of the material for forming the lid member, it becomes possible to position the synthetic resin film corresponding to each opening. Then, by heat-pressing the synthetic resin film to the side of the material for forming the lid member, it becomes possible to cover and bond the opening.
Further, a cut line in the shape of the tension piece is formed around the opening of the material for forming the opening tension piece bonded to the material for forming the lid member, and the opening tension piece is formed leaving a portion surrounded by the cut line. By peeling the material from the lid member molding material, it is possible to apply an opening tension piece that covers each opening. Thereafter, by forming the container lid through processing such as punching, it becomes possible to continuously manufacture the container lid.

(Example) An example of implementing the present invention will be described with reference to FIGS. 2 and 3 in the case where aluminum is used as the material for forming the lid member.

FIG. 2 is an explanatory view showing an embodiment of the present invention for manufacturing the easy-to-open container lid shown in FIG. 1, and FIG. 3 is a partial sectional view of FIG. 1.

First, as shown in Fig. 2, an epoxy resin coating 8 (see Fig. 3) is formed on one side in advance, and a plurality of openings 2 arranged in the longitudinal direction at regular intervals are further formed. Long lid member forming material 4a
is continuously supplied, and a long opening is laminated with thermoplastic resin 9 (see FIG. 3) so as to cover each opening 2 on the surface of the coating film 8 of the lid member molding material 4a. The tensile piece forming material 3a is continuously supplied, and the two are heated and pressed by a press heat roll 12 to be bonded.

At this time, the material 4a for forming the lid member and the material 3a for forming the opening tension piece can be easily peeled off, but it is necessary that they are adhered to such an extent that they will not separate due to mechanical vibrations, etc. up to the next process. It is.

For this reason, the coating film 8 of the lid member forming material 4a
For example, when the thermoplastic resin 9 is made of epoxyphenol type, the thermoplastic resin 9 laminated to the opening tension piece molding material 3a is made of nylon type, and when it is made of epoxyurea type, this can be easily solved by using carboxyl group-containing polyolefin type. Can be done.

On the other hand, as shown in the second figure, on the opposite side of the lid member molding material 4a, a heat-adhesive synthetic resin film 7 is continuously laminated by extrusion lamination so as to cover the entire surface including each opening 2. be done. As a result, the opening 2 of the lid member molding material 4a is formed between the synthetic resin film 7 and the opening tension piece molding material 3.
a, and the adhesive strength of the opening tension piece forming material 3a is further strengthened.

Although this example shows an example of the extrusion lamination method, it goes without saying that the synthetic resin film may be laminated by a dry lamination method in the present invention. As the synthetic resin film 7,
In this example, polypropylene or polypropylene copolymer was used, but other polyolefin resins or ioomer resins may also be used.

Next, as shown in the second figure, after cooling the lid member forming material 4a with a cooling roll 13 in a conventional manner,
The opening tension piece forming material 3a is punched by the punch 10.
A cut line 11 in the shape of the tension piece 3 is provided around the opening 2 of the holder. At this time, as shown in the third diagram,
The cut line 11 slightly cuts into the lid member molding material 4a to completely cut the opening tension piece molding material 3a.

After that, the cut line 1 of the opening tension piece forming material 3a
By pulling the outer part of 1 in a direction different from the feeding direction of the lid member forming material 4a, the opening tension piece forming material 3a leaves only the opening tension piece 3 on the lid member forming material 4a. The scrap 15 is then wound onto the winding roll 14.

Next, as shown in the second diagram, the lid member forming material 4 is
A is formed into the container lid shown in the first figure by punching using a punch 16.

The present invention is not limited to the above embodiments, and for example, the lid member forming material 4a may be a synthetic resin plate material such as polypropylene or vinyl chloride. Further, the openings 2 provided in advance in the lid member molding material 4a are not limited to one row, but may be in multiple rows.

(Effects of the Invention) As is clear from the above description, according to the present invention, the elongated opening tension piece forming material described above is adapted to cover a large number of openings provided in the elongated lid member forming material. is continuously supplied and bonded to the lid member molding material, and at the same time, the synthetic resin film is continuously supplied and bonded to the other side of the lid member molding material so as to cover the opening. Therefore, each opening can be reliably and efficiently sealed.

Then, a cut line in the shape of the opening tension piece is made around the opening of the tension piece forming material bonded to the lid member forming material, and the excess is peeled off and removed, so that the opening tension piece is removed. Since it can be formed efficiently and the material for forming the lid member is then molded into the shape of a container lid, it is possible to continuously mass-produce container lids that are easy to open.

[Brief explanation of the drawing]

The illustrations show an example of the implementation of the present invention; FIG. 1 is a perspective view of an easy-to-open container lid, FIG. 2 is an explanatory diagram of the manufacturing process of the present invention, and FIG.
It is a partial sectional view of the figure. 1... Container lid, 2... Opening, 3... Opening tension piece, 3
a... Material for forming an opening tension piece, 4... Lid member, 4a... Material for forming lid member, 7... Synthetic resin film, 11... Cut line.

Claims (1)

[Claims] 1. A method for producing an easy-to-open container lid comprising a lid member having an opening and an easily peelable opening tension piece applied to the outer surface of the lid member so as to cover the opening. Continuously supply a long material for forming a lid member, which is formed in advance by arranging the openings at predetermined intervals in the longitudinal direction. Continuously supplies a material for forming an opening tension piece that can be heat-bonded so as to cover the material, and the material for forming an opening tension piece is heat-pressed to the material for forming a lid member to releasably adhere it, and the material for forming a lid member is A synthetic resin film that can be heat-adhered to the inner surface of the lid is continuously supplied so as to cover the opening, and the opening tension piece is heated and pressure-welded to cover the lid member forming material and the opening. adhering it to a molding material to seal the opening;
Further, a cut line in the shape of the opening tension piece is formed around the opening of the opening tension piece forming material adhered to the lid member forming material, and the opening tension piece is formed by leaving a portion surrounded by the cut line. A method for manufacturing a container lid that is easy to open, characterized by peeling off a piece of material for forming a lid member from the material for forming a lid member, and then forming the material for forming a lid member into a container lid by punching or the like.