JP2009298437A - Embossed can - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an embossed can capable of maintaining a paneling strength without adding restrictions to a degree of freedom in design of a symbol mark or a decorative mark, and causing increase in manufacturing cost without increasing processing time of the can body. <P>SOLUTION: In the embossed can which expresses a symbol mark or a decorative mark by embosses on the can body, an embossed part 4 and a paneling reinforced plastic deformation part 5 are formed on the can body 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to what is also called an embossed can or a debossed can in which a decorative mark or a symbol mark can be distinguished by plastic processing a convex part or a concave part in a part of a can body.

Conventional technology

A two-piece embossed can that has been embossed into a can body and has a symbol mark or decorative mark expressed in a relief shape with irregularities on the can body has been developed as a beverage can for filling a beverage such as coffee.
In this embossed can, the symbol mark and the decoration mark are three-dimensionally expressed in a relief shape by the unevenness of the can body, so that the appearance of the can can be made very characteristic. (See Patent Documents 1 and 2)
JP2001-30033 JP2003-340539 Special table 2000-515071 JP-A-4-300038

However, in this conventional embossed can, the unevenness of the can body forming the symbol mark and decoration mark is unevenly distributed locally on the can body due to the convenience of graphic representation. Is known to decrease. The paneling strength refers to a resistance strength against deformed deformation due to a pressure difference between the inside and outside of the can body. In order to prevent this, conventionally, methods such as increasing the can body thickness (Tw) or responding to embossed designs are adopted.
However, in recent years, it has become necessary to maintain paneling strength without increasing Tw from the viewpoint of cost reduction.
Moreover, the relief by embossing is also formed in the perimeter of a can body (refer patent document 3). Even when the embossing is a part of the can body or around the entire circumference, there is an embossed shape in which the paneling strength is lowered, so that the degree of freedom in design of the relief is restricted.
The present invention has been made in view of the above circumstances, and in an embossed can in which a symbol mark and a decoration mark are expressed by embossing on the can body, there is no restriction on the freedom of design of the symbol mark and the decoration mark. Furthermore, an object of the present invention is to provide an embossed can that can maintain the paneling strength and does not cause environmental problems or increase the manufacturing cost.

  Corresponding to this object, the embossed can of the present invention is characterized in that the can body is provided with an embossed portion and a paneling reinforced plastic working portion.

In the invention described in claim 1, even if the paneling strength of the can body is reduced by the amount of the embossed portion provided in the can body, the paneling strength is reinforced by the formation of the paneling reinforcing plastic processing portion. It can prevent crushing and keep the can body healthy. Therefore, since there is no restriction on the paneling strength in the formation of the symbol mark and decoration mark, the degree of freedom in design can be improved.
Paneling reinforced plastic processing can use bead processing of the can body or circumferential polyhedron wall processing, but these paneling reinforced plastic processing is plastic processing of the can body unlike reinforcement technology that adds other materials. Since it is the same type of technology as embossing, it is also possible to shape the mold on the same tool, and both processes can be performed at the same time. It does not cause problems or increase manufacturing costs.

  In the invention described in claim 2, since the paneling reinforced plastic working is a technique that has been established and proven, stable processing is possible.

  In the invention described in claim 3, since the region having the embossed portion and the region having the paneling reinforced plastic working portion are arranged in the direction of the long center line of the can body, the respective figures can be arranged without interfering with each other. It does not cause restrictions on the design of figures.

  In the invention described in claim 4, the paneling reinforced plastic working portion is formed by making a round of the can body as needed, or may be formed in a partial circumference shorter than one round, so there is no wasteful machining.

  In the invention described in claim 5, the shape of the paneling reinforced plastic working portion can be arbitrarily selected.

The details of the present invention will be described below with reference to the drawings showing the best embodiment.
In FIG. 1, 1 is an embossing can. The embossed can 1 is a two-piece can in this embodiment, and includes a bottomed can body 2 and a can lid 3 that is wound around the upper end edge of the can body 2 and closes the upper end opening of the can body 2.

  The can body 2 is provided with an embossed portion 4 and a paneling reinforced plastic working portion 5, and the region having the embossed portion 4 and the region having the paneling reinforced plastic working portion 5 are formed adjacent to each other in the direction of the center line 6 of the can body 2. is doing. The embossed portion 4 is a portion in which a symbol mark and a decorative mark related to the contents of the can are expressed in a relief shape by embossing.

  For embossing, molds with shaped marks are placed inside and outside the can body, the inside and outside dies are male and female, and the can body is pressed together to plastically deform into irregularities. This technology transfers the mark shape to the can body wall. This embossing directly or indirectly exerts an influence on the paneling strength on the embossed portion 4 and the surrounding portion.

The paneling reinforced plastic working part 5 is provided within the range of the influence on the paneling strength of such embossing.
The paneling reinforced plastic working section 5 plastically processes the wall of the can body 2 to form an overhanging groove, a groove section, or an uneven section that makes a round around the can body 2 and forms a center line 6 on the wall of the can lid 3. Gives strength against vertical deformation. The can body 2 has a uniform shape in the entire length around the center line 6 of the can body 2 or a continuous or repeated shape of the basic unit shape. 2 is formed.

As such paneling reinforced plastic working part 5, bead processing and circumferential polyhedral wall processing are known.
As shown in FIG. 2, the bead processing is for processing a bead 7 in which a cross-sectional shape by a virtual plane including the center line 6 is a constant overhang groove or a recess groove in the circumferential direction.
The circumferential polyhedral wall processing is processing for forming the circumferential polyhedral wall 8.
FIG. 1 shows an example in which a circumferential polyhedral wall processing is performed as the paneling reinforcing plastic processing portion 5.
The configuration of the circumferential polyhedral wall 8 is described in detail in Patent Document 4. That is, the circumferential polyhedral wall 8 is composed of a large number of structural unit surfaces, and each structural unit surface has a phase of the adjacent structural unit surface 1/2 in the can axis direction (vertical direction in FIG. 3A). They are staggered.
Each adjacent structural unit surface shares a boundary ridge line and a crossing portion where the boundary ridge lines intersect, and the boundary ridge line and the crossing portion described above are relatively convex toward the outside of the can as compared to the structural unit surface. Yes.

  In addition, adjacent individual structural unit surfaces have a shape bent by ridge lines connecting the four vertices a, b, c, and d located at the intersection. Therefore, when the can body 2 is cut in, for example, the XX direction along the ridge line connecting the vertices b and d, the cross-sectional shape is as shown in FIG. It becomes a regular polygon.

4 and 5 are schematic views for explaining a method of forming the circumferential polyhedral wall 8 described above. 4 and 5, the shapes of the polyhedral molded inner mold (hereinafter referred to as the inner mold) and the polyhedral molded outer mold (hereinafter referred to as the outer mold) are simplified for convenience of explanation. The inner mold 11 has a polyhedron composed of ridges corresponding to the vertices and ridges of the constituent unit surfaces constituting the polyhedral wall of the can body 2. The number of polyhedrons formed in this inner mold is N (N is 1, 2, 3,...) Than the number of repetitions in the circumferential direction of the unit constituting surfaces constituting the circumferential polyhedron formed in the can body 2. Natural number) The number of repetitions is small.
The circumferential polyhedral wall 8 can be manufactured using a mold having an inner mold inserted into the can body 2 and an outer mold disposed on the outer side of the can body 2 so as to face the inner mold. it can.

  FIG. 4 is a cross-sectional explanatory view showing the manufacturing principle of the outer mold 12. The outer mold 12 has an envelope shape. Assuming the inner mold 50 in consideration of the can body thickness t, the outer mold 12 has the shape of the envelope.

  FIG. 5 is an explanatory cross-sectional view showing the principle of forming the circumferential polyhedral wall 8 into a can. The outer mold 12 is manufactured as described above. The inner mold 11 is the shape of the one-dot chain line portion on the left side of FIG. These inner mold 11 and outer mold 12 are arranged so that the corresponding ridges and valleys mesh with each other, and the same in a state where the side wall of the can body 2 is sandwiched between the inner mold 11 and the outer mold 12 A circumferential polyhedral wall can be formed by rotating at a peripheral speed of.

In the embossed can 1 configured as described above, even if the paneling strength of the can body 2 is lowered by the amount of the embossed portion 4 provided in the can body 2, the paneling strength is reinforced by forming the paneling reinforcing plastic working portion 5. can do.
Plastic processing including bead processing and circumferential polyhedral wall processing can be performed prior to embossing or after embossing. Furthermore, embossing and paneling strength reinforcement can be performed simultaneously in the same process, and the formation of the embossed can 1 can be realized easily and stably.
(Experimental example)
(1) An embossed can of the present invention having both the embossed part 4 and the paneling reinforced plastic working part 5 and the peripheral polyhedral wall 8 is made as a trial, and only the embossed part is provided and the paneling reinforced plastic working part 5 is not provided. The paneling strength was evaluated in comparison with the embossed can. Here, as the paneling reinforced plastic working portion 5, circumferential polyhedral wall machining was adopted.
(2) Paneling strength evaluation results for embossed cans










Paneling strength [KPa]

In the embossed can according to the present invention, even if the paneling strength of the can body is reduced by the amount of the embossed portion provided in the can body, the paneling strength is reinforced by the formation of the paneling reinforcing plastic processing portion, thereby preventing the can body from being crushed. Can keep the can body healthy. Therefore, since there is no restriction on the paneling strength in the formation of the symbol mark and decoration mark, the degree of freedom in design can be improved.
Paneling reinforced plastic processing can use bead processing of the can body or circumferential polyhedron wall processing, but these paneling reinforced plastic processing is plastic processing of the can body unlike reinforcement technology that adds other materials. Since it is the same type of technology as embossing, depending on the combination of tools, both processes can be performed simultaneously. In this case, environmental problems and manufacturing costs can be suppressed without increasing the number of processing steps. .

  Further, in the present invention, paneling reinforced plastic working is a technique that has been established and proven, and thus stable processing is possible.

  Further, in the present invention, the region having the embossed portion and the region having the paneling reinforced plastic processed portion are arranged in the long center line direction of the can body, so that the respective shapes can be arranged without interfering with each other. There are no design constraints.

Moreover, in this invention, the shape of a paneling reinforcement plastic processing part can be selected arbitrarily.
As is apparent from the above description, in the present invention, the embossed can in which the symbol mark and the decoration mark are expressed by embossing on the can body, the paneling strength is not limited without restricting the freedom of design of the symbol mark and the decoration mark. It is possible to obtain an embossed can that does not cause an environmental problem or increase the manufacturing cost without increasing the number of processing steps of the can body.

Front view of embossed can Front view of an embossed can according to another embodiment It is a figure which shows the can body which has a circumferential polyhedral wall, (a) is a front view, (b) is XX section sectional drawing in (a). Cross-sectional explanatory drawing showing the manufacturing principle of inner and outer molds Cross-sectional explanatory drawing showing the forming principle of the circumferential polyhedral wall

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Embossed can 2 Can body 3 Can lid 4 Embossed part 5 Paneling reinforcement plastic processing part 6 Center line 7 Bead 8 Circumferential polyhedral wall 11 Inner mold 12 Outer mold 50 Aerial mold 51 for outer mold 51 Material for outer mold

Claims (5)

  An embossed can comprising an embossed portion and a paneling reinforced plastic working portion on a can body   2. The embossed can according to claim 1, wherein the paneling reinforced plastic working portion is a bead processing portion or a circumferential polyhedral wall processing portion of a can body.   2. The embossed can according to claim 1, wherein the region having the embossed portion and the region having the paneling reinforced plastic working portion are arranged in alignment with a center line direction of the can body.   2. The paneling reinforced plastic working portion is formed by making a round of the can body around a center line of the can body, or by making a partial turn of the can body around a center line. Embossed can   2. The embossed can according to claim 1, wherein the paneling-reinforced plastic working portion has the same shape in the entire length around the center line, or a continuous or repeated shape of a basic unit figure.

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