JP2002254534A - Method for molding paper product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method which can easily mold paper products having desired peripheral surfaces and curved surfaces, which can be used as cushioning materials for approximately columnar, approximately cylindrical, approximately conical, approximately truncated-conical, and spherical articles and articles having other shapes, from a paper plate such as corrugated cardboard. SOLUTION: A state in which the first curved surface forming plates 13 and the second curved surface forming plates 23 are folded at a prescribed angle and a state in which the curved surface forming plates 13 and 23 are warped to have a prescribed radius of curvature are maintained. Only by laminating the second curved surface forming plate 23 between the first adjacent curved surface forming plates 13, the paper product having a desired curved surface can be molded. The shape of the paper product can be approximately conical, approximately truncated-conical, and semispherical.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an article having a substantially cylindrical shape, a substantially cylindrical shape, a substantially conical shape, a substantially frustoconical shape, such as a bottle of sake or wine, or a watermelon, melon, peach, etc. Used as a paper cushioning material when packing and storing spherical articles in a cardboard box or the like, or a desired peripheral surface or curved surface like a substantially truncated conical paper product such as a paper pot plant The present invention relates to a method for forming a paper product having the same.

[0002]

2. Description of the Related Art There is known a paper cushioning material which is assembled into a predetermined three-dimensional shape by bending and sticking at important points and which exhibits a cushioning function equivalent to that of a conventional polystyrene foam cushioning material. This cushioning material made of seed paper is provided with fold lines and cut lines at appropriate places on a paper board made of cardboard or the like to form a large number of bottom plates, side plates, etc. for forming a concave portion into which the appropriate position of the package is fitted. The concave portion is assembled by bending and sticking. In detail, in addition to the bottom plate and the side plates constituting the concave portion, a plurality of reinforcing face plates and bonding surplus plates for fixing the bent state of the bent portions are provided, and the respective face plates are bent and attached. , And the assembled state of the recess is maintained. The seed paper cushioning material is often used when packing articles such as electronic application equipment and home electric appliances. In this case, the recess is formed in a substantially rectangular parallelepiped shape.

On the other hand, when packing articles such as bottles of sake or wine and the like having a substantially cylindrical shape, a substantially cylindrical shape, a substantially conical shape, a substantially frusto-conical shape, etc., a paper cushioning material for protecting the articles is made of cardboard. When making with a paper board such as
While providing a large number of divided face plates for forming a peripheral portion such as a substantially frustoconical shape, while bending these divided face plates at a predetermined angle,
Requires the work of bonding adjacent divided face plates together,
There is a problem that it takes time to assemble. Therefore, in the past, in the packing of articles having the above-mentioned desired peripheral surface portion, a paper cushioning material made of pulp mold is often used. However, pulp mold paper cushioning materials require a mold for production, which may increase the production cost, and is not suitable for use in electrical products because paper dust is generated during use. There is a problem.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional situation, and its object is to provide a substantially cylindrical shape or a substantially cylindrical shape such as a bottle of sake or wine. Used as a paper cushioning material for shapes, approximately cones, approximately truncated cones, and spherical items such as watermelon, melon, peach, etc., and also approximately truncated cones such as paper potted plants and other hemispheres It is an object of the present invention to provide a novel molding method which can easily form a paper product having a desired peripheral surface or a curved surface, such as a paper product having a desired shape, on a paper board such as cardboard.

[0005]

In order to achieve the above object, a first aspect of the present invention is to form a cylindrical sheet by stacking a first paper board and a second paper board and bending and attaching important parts of the paper boards. A method of forming a paper product having a peripheral surface such as a shape, a cone, a truncated cone, etc., wherein the first paper board is formed along an outer peripheral edge of the first bottom board formed in a desired planar shape. It has a plurality of first peripheral surface forming plates radially connected to each other via a folding line, and the second paper plate extends along the outer peripheral edge of the second bottom plate overlapping the bottom plate of the first paper plate. , Radially having a plurality of second peripheral surface forming plates continuously provided via a folding line, and the second peripheral surface forming plates are adjacent to each other on the first paper plate. Are formed so as to be able to be bonded together, and a second paper board is superimposed on the first paper board, and a first peripheral surface shape is formed. While maintaining the state in which the plate and the second peripheral surface forming plate are bent at the fold line at a predetermined angle, the second peripheral surface forming plate is bonded between the adjacent first peripheral surface forming plates, and Is fixed to a state where the peripheral surface forming plate is bent at a predetermined angle to form a desired peripheral surface portion such as a cylinder, a cone, and a truncated cone. According to such a method, the first peripheral surface forming plate and the second peripheral surface forming plate are folded at a predetermined angle while maintaining a state in which the first peripheral surface forming plate is bent at a predetermined angle, and the second peripheral surface forming plate is adjacent to the first peripheral surface forming plate. By simply attaching the peripheral surface forming plate, a paper product having a desired peripheral surface portion, such as a cylinder, a cone, or a truncated cone, can be formed.

According to a second aspect of the present invention, the first paper board and the second paper board are overlapped, and the paper boards have a curved surface such as a substantially conical shape, a substantially truncated conical shape, a hemispherical shape, etc. by bending and sticking at important points. A method of forming a paper product, wherein a first paper plate is formed along a peripheral surface of a first bottom plate formed into a desired planar shape, and a first curved surface formed continuously along a folding line. The second paper board has a plurality of boards radially, and the second paper board is formed along the outer peripheral edge of the second bottom board that overlaps the bottom board of the first paper board, and the second curved board is formed continuously along the folding line. The second curved surface forming plate has a plurality of plates radially, and the second curved surface forming plate is formed so as to be able to be bonded between adjacent first curved surface forming plates in the first paper plate, and the first paper plate A second paper board is stacked on top, and the first curved surface forming plate and the second curved surface forming plate are formed at a predetermined angle. While maintaining the state where each curved surface forming plate is curved from the inner edge to the outer edge which is the bottom plate side, between the adjacent first curved surface forming plates. Laminating the second curved surface forming plate, fixing the state where each curved surface forming plate is bent at a predetermined angle and curved with a predetermined curvature,
It is characterized by forming a desired curved surface portion such as a substantially conical shape, a substantially truncated cone shape, a hemispherical shape, or the like. According to such a method, while maintaining the state where the first curved surface forming plate and the second curved surface forming plate are bent at a predetermined angle, the state where each curved surface forming plate is curved with a predetermined curvature is maintained. By simply bonding the second curved surface forming plate between the adjacent first curved surface forming plates, a paper product having a desired curved surface portion, such as a substantially conical shape, a substantially truncated cone shape, or a hemispherical shape, is formed. be able to.

[0007] In the first or second aspect, the first paper board and the second paper board are set in a female mold of a forming die in a state of being vertically stacked, and a male mold is overlapped on the female mold from above, whereby the first paper board and the second paper board are stacked from above. It is preferable to bend and attach important parts of the first paper board and the second paper board in one step. In the present invention,
The paper board is preferably a cardboard.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. First, a method of forming the paper product A shown in FIGS. 4 and 5 will be described with reference to FIGS.
In the drawing, reference numeral 10 denotes a first paper board, 20 denotes a second paper board, 30
Indicates a female type and 40 indicates a male type. Each paper board 10, 20
Is made of cardboard having a desired strength, and is formed into a shape as shown in the figure.

That is, the first paper board 10 is formed along a fold line 12 along the outer peripheral edge of the first bottom plate 11 formed in a plane circular shape.
Have a plurality of first curved surface forming plates 13 connected radially. The second paper plate 20 is formed with a second curved surface forming plate 23 which is continuously provided via a fold line 22 along the outer peripheral edge of a plane circular second bottom plate 21 overlapping the first bottom plate 11.
Are radially provided. The second curved surface forming plate 23 is
First curved surface forming plate 1 adjacent to first paper plate 10
It is formed so as to be able to be bonded between three,
An adhesive to be thermally welded is applied in advance to the left and right side edges on the back side to be joined to the first curved surface forming plate 13.

The female mold 30 is formed around a circular central inner bottom 31 on which the first bottom plate 11 and the second bottom plate 21 are placed.
It has a mortar-shaped recess 32. The concave portion 32 is formed by bending the first curved surface forming plate 13 of the first paper board 10 and the second curved surface forming plate 23 of the second paper board 20 in the valley folding direction along the folding lines 12 and 22, respectively. Face plate 1
1 and 21, and the respective curved surface forming plates 13 and 23 can be curved inwardly from the inner edge (the edge on the side of the fold lines 12 and 22) toward the outer edge. Formed. The male mold 40 has a convex portion 42 that matches the concave portion 32 around a central protrusion 41 that matches the central inner bottom portion 31. Further, a heating section for heat-welding the above-mentioned adhesive is embedded in the female mold 30 and the male mold 40.

Reference numerals 51 and 52 denote guide portions for guiding the vertical sliding of the male die 40 with respect to the female die 30, and 53 and 54 denote a first paper plate 10 and a second paper plate 20 which are vertically set in the die. Guide holes for aligning the holes.

A method of forming the first paper board 10 and the second paper board 20 into a predetermined shape using the female mold 30 and the male mold 40 will be described. The first paper board 10 is set while performing the alignment using the holes 53, and the second paper board 20 is set on the first paper board 10 while performing the alignment using the guide holes 54. At this time, the second curved surface forming plate 23 of the second paper plate 20 is located between the adjacent first curved surface forming plates 13 of the first paper plate 10.

Next, the male mold 40 is overlaid on the female mold 30 so that the concave portions 32 and the convex portions 42 are aligned with each other.
1 and 21 are pushed downward, the respective curved surface forming plates 13 and 23 are bent in the valley direction via the folding lines 12 and 22, and the respective curved surface forming plates 13 and 23 are curved in a bulging shape inward. While maintaining the above, the above-mentioned adhesive is melted, and the second curved surface forming plate 23 is attached between the adjacent first curved surface forming plates 13 (see FIGS. 2 to 3).

As shown in FIGS. 4 and 5, the paper product A removed from the mold after the end of the attachment is substantially frustoconical and curved inwardly from the inner edge toward the outer edge. Since the first curved surface forming plate 13 and the second curved surface forming plate 23 are alternately positioned and adhered to each other, the folded state and the curved state are formed. Are firmly maintained. Therefore,
It is not necessary to separately provide a reinforcing face plate, an adhesive margin plate, or the like, and it is possible to assemble and mold in a single step using a molding die as shown in the figure without the need for manually folding or bonding. Such a paper product A can be used arbitrarily according to a paper cushioning material for protecting a protruding portion on the back side of a television CRT when packing it, for example, or other purposes. Further, in this example, the case where the curved surface forming plates 13 and 23 are curved in a swelling shape inward is shown. However, by changing the curved shape of the inner peripheral surface of the concave portion 32 and the outer peripheral surface of the convex portion 42, the curved surface forming plate is changed. It is also possible to cope with a form in which the 13, 23 curves outwardly in a curved manner. In this case, a substantially hemispherical paper product can be obtained, and the hemispherical paper product can be joined up and down. To obtain a spherical paper product.

FIGS. 6 to 9 show an example in which the paper product has a conical shape and its peripheral surface is not curved. The same components as those in the above-mentioned example are denoted by the same reference numerals in the figures. Repetitive description will be omitted, for example. First paper board 1 of this example
0 ′ is a fold line 12 along the outer peripheral edge of the first bottom plate 11.
A plurality of first peripheral surface forming plates 13 ′ are provided radially in a row. The second paper board 20 ′ is provided on the first bottom board 1.
A plurality of second peripheral surface forming plates 23 ′ are provided radially along the outer peripheral edge of the second bottom surface plate 21 that overlaps the first bottom surface 21 via the folding line 22. The second peripheral surface forming plate 23 ′ is formed so as to be able to be bonded between the adjacent first peripheral surface forming plates 13 ′, and serves as a joint portion with the first peripheral surface forming plate 13 ′. An adhesive to be thermally welded is applied in advance to the left and right side edges on the back side.

The female mold 30 'has a mortar-shaped recess 32 around a circular central inner bottom 31 on which the first bottom plate 11 and the second bottom plate 21 are placed. The recess 32 is formed by the first peripheral surface forming plate 13 ′ and the second peripheral surface forming plate 23 ′,
It is formed so as to be bent in the valley folding direction at the folding lines 12 and 22, respectively, and to be bent at a predetermined angle with respect to the bottom plates 11 and 21, respectively. The male mold 40 ′ has a convex portion 42 corresponding to the concave portion 32 around a central projecting portion 41 corresponding to the central inner bottom portion 31. Further, a heating section for heat-welding the above-mentioned adhesive is embedded in the female mold 30 'and the male mold 40'.

The first paper board 10 'and the second paper board 20'
A method of forming a predetermined shape using a female mold 30 ′ and a male mold 40 ′ is as follows. First, the first paper board 10 ′ is set on the female mold 30 ′ while performing alignment, and furthermore, The second paper board 20 'is set on top of it. At this time, the second peripheral surface forming plate 23 'is positioned between the adjacent first peripheral surface forming plates 13'.

Next, the male mold 40 'is overlapped with the female mold 30' from above, so that the concave portions 32 and the convex portions 42 are aligned with each other. Each of the peripheral surface forming plates 13 ′ and 23 ′ is bent in the valley direction, and the adhesive is melted while maintaining the state, and the second peripheral surface forming plates 13 ′ are placed between the adjacent first peripheral surface forming plates 13 ′. The peripheral surface forming plate 23 'is attached (see FIG. 7).

The paper product A 'taken out of the mold after the application is completed is formed into a shape having a substantially frustoconical peripheral surface as shown in FIGS. 8 and 9, and a first peripheral surface forming plate. Since the 13 'and the second peripheral surface forming plate 23' are alternately positioned and adhered to each other, they are fixed in a state where the bent state is firmly maintained. Therefore, there is no need to separately provide a reinforcing face plate or a bonding surrogate plate, and also, without the need for manual folding or bonding work,
It is possible to assemble and mold as shown in one step by a molding die. Such a paper product A ′ can be used arbitrarily according to, for example, a paper flower pot or other purposes.

Although the embodiment of the present invention has been described above, the forming method according to the present invention is not limited to the forming of the illustrated paper product, and the peripheral surface such as a cylinder, a cone, and a truncated cone is used. It is needless to say that the present invention can be widely applied as a method for forming a paper product having a desired curved surface such as a paper product having a desired curved surface such as a substantially conical shape, a substantially truncated cone shape, and a hemispherical shape. Further, the method of the present invention can be widely applied to the molding of paper cushioning materials and other various paper products.

[0021]

As described above, the present invention maintains the folded state of the first peripheral surface forming plate and the second peripheral surface forming plate while maintaining the second peripheral surface forming plate between the adjacent first peripheral surface forming plates. The bent state of the peripheral surface forming plates can be fixed and maintained by an extremely simple operation of attaching the peripheral surface forming plates. In addition, the present invention provides an extremely simple operation of sticking the second curved surface forming plate between the adjacent first curved surface forming plates while maintaining the bent state of the first curved surface forming plate and the second curved surface forming plate. Thus, the bent state of the curved surface forming plates can be fixed and maintained. Therefore, it is not necessary to provide a large number of reinforcing face plates, adhesive margin face plates, etc., and a paper product having a peripheral surface such as a cylinder, a cone, a truncated cone or the like, or a substantially cone, a substantially truncated cone, a hemisphere, etc. Thus, a paper product having a desired curved surface can be obtained, and it can be suitably used as a method capable of forming a novel paper product having various uses and shapes which has not been hitherto simple, quickly, and at low cost.

In the present invention, the first paper board and the second paper board are set in a female mold of a molding die in a state of being vertically stacked,
If the male mold is placed on the female mold from above, bending and sticking of important parts of the first and second paper boards are performed in one process. This can be performed in one step, and the above-described effects can be made more effective. Further, in the present invention, when the paper board is made of corrugated cardboard, the cushioning function required as a paper product,
There are effects such as easy securing of strength and durability.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of the present invention.

FIG. 2 is a sectional view showing a molding procedure.

FIG. 3 is a sectional view showing a molding procedure.

FIG. 4 is a perspective view showing an example of a paper product after assembly.

5 is a vertical sectional front view of the paper product shown in FIG. 4;

FIG. 6 is a perspective view showing another example of the embodiment of the present invention.

FIG. 7 is a sectional view showing a molding procedure.

FIG. 8 is a perspective view showing another example of the paper product after assembly.

9 is a vertical sectional front view of the paper product shown in FIG. 8;

[Explanation of symbols]

 10, 10 ': First paper board 20, 20': Second paper board 12, 22: Folded line 11: First bottom plate 13: First curved surface forming plate 21: Second bottom plate 23: Second Curved surface forming plates A, A ': paper products

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E066 BA02 CA04 HA01 KA04 MA07 NA48 NA53 3E075 AA05 BA30 BA95 CA01 DC18 DC28 DC44 DD03 DD13 DD43 GA03

Claims (2)

[Claims] 1. A first paper board and a second paper board are overlapped, and a cylindrical shape is formed by bending and attaching important portions of the paper boards.
A method of forming a paper product having a peripheral surface such as a conical shape or a truncated conical shape, wherein the first paper board forms a folding line along an outer peripheral edge of the first bottom board formed into a desired planar shape. A plurality of first peripheral surface forming plates radially connected to each other, and a second paper plate is folded along the outer peripheral edge of the second bottom plate overlapping the bottom plate of the first paper plate. And a plurality of second peripheral surface forming plates radially connected to each other, and the second peripheral surface forming plate is between adjacent first peripheral surface forming plates in the first paper board. A state in which a second paper sheet is superimposed on the first paper sheet, and the first peripheral surface forming plate and the second peripheral surface forming plate are bent at a predetermined angle along the folding line. While maintaining the above, the second peripheral surface forming plate is stuck together between the adjacent first peripheral surface forming plates, A method of forming a paper product, comprising fixing a state in which the peripheral surface forming plate is bent at a predetermined angle and forming a desired peripheral surface portion such as a cylindrical shape, a conical shape, and a truncated conical shape. 2. A paper product having a desired curved surface, such as a substantially conical shape, a substantially truncated cone shape, or a hemispherical shape, is formed by stacking a first paper plate and a second paper plate and bending and attaching important portions of the paper plates. The first paper board, a plurality of first curved surface forming plate radially connected along a fold line along the outer peripheral edge of the first bottom plate formed in a desired planar shape The second paper plate has a plurality of second curved surface forming plates radially connected along a fold line along an outer peripheral edge of the second bottom plate overlapping the bottom plate of the first paper plate. And the second curved surface forming plate is formed so as to be able to be bonded between adjacent first curved surface forming plates in the first paper plate, and a second curved surface forming plate is formed on the first paper plate. At the same time as the paper plates are stacked, the first curved surface forming plate and the second curved surface forming plate are While bending the respective curved surface forming plates from the inner end edge on the bottom plate side toward the outer edge, the second curved surface forming plate between the adjacent first curved surface forming plates. Affixing the curved surface forming plates to fix a state where each curved surface forming plate is bent at a predetermined angle and curved with a predetermined curvature to form a desired curved surface portion such as a substantially conical shape, a substantially truncated conical shape, or a hemispherical shape. A method for forming a paper product, characterized by the following.