JPS61174500A - Production of three-dimensional paper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for manufacturing three-dimensional paper, and in particular, to a method for producing three-dimensional paper, in particular, for constructing a three-dimensional shape having an internal space without providing a joint portion such as a glue allowance or a seam. This invention relates to a method for producing three-dimensional paper.

[Conventional technology]

BACKGROUND ART Conventionally, three-dimensional paper, that is, three-dimensional paper, has been widely applied and used in many fields, such as for containers such as bags or boxes, toys, and lampshades of lighting devices.

Various conventional examples of this three-dimensional paper are shown in Figures 12 (1) to 1.
This is shown in Figure 2 (7). That is, in the same figure (1), a rectangular parallelepiped box l
The figure (2) shows an envelope-shaped bag 2, and the figure (2) shows an envelope-shaped bag 2.
3) each shows a cylindrical cushioning material 3 for protecting a glass bottle or the like. In addition, the same figure (4) shows a paper bag 4 for carrying,
FIG. 5 (5) shows a cover 5 for packaging sweets and the like.

Furthermore, the same figure (6) shows the paper balloon 6 as a toy, and the same figure (7) shows the lamp shade 7 for illumination.

By the way, when producing three-dimensional paper as described above, each flat paper material is necessarily cut into a predetermined developed shape and then assembled. When assembling, the predetermined ends can be joined to each other by gluing with glue, by sewing, by using a connecting member such as a stapler, by using a mechanical zipper, or by inserting the ends into each other in a predetermined manner. Generally, a method is adopted in which the material is molded into a shape and then inserted and locked.

Therefore, the produced three-dimensional paper necessarily has a joint part between the end parts to constitute a three-dimensional part, for example, in the case of the above-mentioned FIG. The same applies to (2) to (7) in the same figure).

[Problem that the invention seeks to solve]

However, in the conventional manufacturing method of three-dimensional paper, regardless of the shape, size, or purpose of use, a flat sheet of paper is cut or folded, and the predetermined ends of the paper are joined together in some way. If not, it is inevitable that the three-dimensional shape will not be formed, so the paper material that can be used for the joint part is wasted, and because it is necessary to cut the joint part with consideration, There was a serious disadvantage that the cutting rate that can be used effectively decreased and it was difficult to conserve resources.

In addition, during assembly, etc., joining processes such as gluing and sewing the joint parts are involved, which not only makes it difficult to shorten the manufacturing process, but also makes it difficult to shorten the manufacturing process. It also had the disadvantage of being unsuitable for making.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing three-dimensional paper that improves the disadvantages of the prior art, saves resources, and significantly shortens the manufacturing process.

[Means for solving problems]

Therefore, in the present invention, a porridge-like paper stock containing plant fibers is adhered to a predetermined surface of a three-dimensional mold made of hole-like members formed into a three-dimensional shape, and then the adhered paper stock is made substantially uniform and semi-dried. While repeating this operation sequentially along the three-dimensional mold, the surfaces are continuously joined by fiber bonding, and after the entire adhered paper stock is dried, the adhered paper stock is removed from the three-dimensional mold. The purpose is to achieve the above-mentioned objective by employing a technique such as manufacturing a three-dimensional paper having an internal space by separating the paper.

[Embodiments of the invention]

(First Embodiment) Hereinafter, a first embodiment of the present invention will be described based on FIGS. 1 to 4.

This example is the most suitable method for producing three-dimensional paper such as rectangular parallelepipeds or cubes, and is related to the surface-papering method in which predetermined surfaces constituting a three-dimensional object are sequentially papered to finally produce the desired three-dimensional paper. be. Here, a case will be shown in which three-dimensional paper having no rectangular parallelepiped joints as shown in FIG. 12(1) is manufactured.

First, I will explain the process of making paper stock step by step.

This method of making paper stock is commonly used, and here we will explain how to make paper stock for Western paper.

■After peeling off the bark of wood such as coniferous trees and broad-leaved trees using a peeling machine, chips are made using a mechanical valve or a chipper using a chipping machine.

■1 Mechanical pulp and chips undergo processing such as cooking, bleaching, and removing impurities.

■Mix pulp fibers and chip fibers in a specified manner, add water, and beat with a beater.

(2) A predetermined amount of sizing agent, tensile agent, dye, etc. is thoroughly mixed with the beaten pulp in water to prepare a porridge-like paper material 10.

Next, as shown in FIG. 1, a desired rectangular parallelepiped wire mesh mold 12 is
Prepare. For this wire mesh mold 12, a stainless steel wire mesh with 24 meshes is used on the real side.

First, as shown in FIG. 2, the stock 10 is poured into the side surface A of the wire mesh mold 12, and the open opening is covered with M14 and fixed so that the stock 10 does not flow out.

Then, the wire mesh mold 12 is moved back and forth and left and right so that the thickness of the paper on the side surface A becomes uniform. The thickness of this paper can be freely adjusted depending on the amount of paper stock 10. At this time, the stock 10 is made to spread accurately to both corners A ll and A o of side A to sides B and D, respectively.

Furthermore, after draining most of the water, side A is gently tilted as shown in Fig. 3, and left as is for a predetermined period of time, for example, 30 minutes, to thoroughly drain water and semi-dry. The purpose of this is to facilitate drainage, so it is necessary to slope the plate steeply to prevent the raw stock 10 from slipping down.

Next, side B is washed in the same manner as described above. At this time, the side A that has already been papered is placed vertically, but the paper stock will not slip off because it has been sufficiently drained and semi-dried. Also, each corner BA, Bc of side B reaching side A, C.
When the paper material 10 is thoroughly distributed evenly in the paper stock 10, as shown in FIG. The fibers are intertwined with each other, and side A and side B are continuously formed into one piece.

In the same way, after skiving the sides C and D, finally skim the bottom surface E. In the case of this bottom surface E, the surrounding corners are processed in the same manner as described above. After the whole is completely dried (natural drying or forced drying), the rectangular parallelepiped-shaped three-dimensional paper (see the shape shown in FIG. 12 (1)) is peeled off from the wire mesh mold 12.

Therefore, according to the above-described method, it is possible to easily produce a rectangular parallelepiped-shaped three-dimensional paper that has no joints such as pasting or seams. In addition, this three-dimensional paper can be mass-produced through mechanization, and the process of joining the edges to form a three-dimensional shape can be omitted, making it possible to produce inexpensive three-dimensional paper. In addition, the absence of joints has the advantage of making the product look better.For example, even if it is used in a lampshade of a lighting device, the joints will not cause shadows and reduce the value of the product.

Further, in the first embodiment described above, if all six sides are to be skived, a rectangular parallelepiped box with no joints can be obtained by covering the box with a lid made of 24 mesh wire mesh and repeating the above process six times.

In the first embodiment, the shape to be made miro-like is not limited to a cage shape of a rectangular parallelepiped, but can be applied to almost any shape such as a polygon, a hemisphere having a relatively gently concave surface, or a polyhedron.

(Second Embodiment) Next, a second embodiment of the present invention will be described based on FIGS. 5 to 7.

This example shows a case where a rectangular parallelepiped cage-shaped three-dimensional paper (see the shape in Fig. 12 (1)) is manufactured in the same manner as in the first example described above. This is a spray method that can be easily applied to three-dimensional paper. Further, the steps up to paper stock production are the same as in the first embodiment described above.

Here, the same reference numerals are given to the same components as in the first embodiment described above.

In this embodiment, the paper stock 10 is energized by the jet of compressed air 20, becomes substantially atomized, and is blown out from the nozzle 22A of the spray gun 22.

Therefore, as shown in FIG. 5, the stock 10 is sprayed from the nozzle 22A of the spray gun 22 toward the side surface A of the wire mesh mold 12, which has been prepared in advance and is similar to that of the first embodiment. The spray gun 22 is moved back and forth and left and right to make the thickness uniform and spray accurately and sufficiently to both corners AI and An. Then, this side surface A is pressed and fixed with a net plate 30 (see Fig. 6). This net plate 30 is also made of wire mesh, and in particular, one end has a corner 30A, and the other end is slightly short. It is formed into a seam. Therefore, by pressing the net plate 30, both the side surface A and the corner portion Am can be pressed uniformly. Here, the corner A of the side surface A is pressed down when forming the side wall.

Next, as shown in FIG. 7, the wire mesh mold 12 is turned and the stock 10 is also sprayed on the side surface B, and the same procedure as described above is repeated. ,
At this time, the paper stock 10 is sprayed so as to be sufficiently distributed even at the joints between the surfaces, thereby ensuring that the plant fibers are intertwined with each other and bonded. Furthermore, after repeating the same operation for each of the sides C and D, finally press the paper material 10 with the spray net board in the same manner with the bottom surface E facing up, and after completely drying, place the three-dimensional paper on a wire mesh. It is completed by peeling it off from the mold 12.

Here, when the number of net plates 30 is small, or in order to prevent water from one side from falling onto the other side and delaying drying, the water tray is drained using a device 32 as shown in Fig. 7. You may do so. Furthermore, even if this water receptacle uses a water-absorbing odor instead of the tool 320 to actively promote draining, the process can be shortened.

According to the second embodiment, in addition to having the same effect as the first embodiment, it is also possible to form a three-dimensional paper having a curved surface such as a cylinder or a glass bottle by dividing the curved surface into a plurality of parts. The advantage of using a net board is that it can be used in almost any three-dimensional shape.

(Third Embodiment) Next, a third embodiment of the present invention is shown in FIG. This third embodiment is a modification of the second embodiment. Here, the same components as in the second embodiment are given the same reference numerals.

In this third embodiment, the paper stock 10 is ejected from an L-shaped nozzle 40, and the wire mesh mold 12 held by the support rod 42 is configured to be able to rotate in a predetermined direction together with the support rod 42. ing.

Therefore, the nozzle 40 is inserted from above along the center line of the wire mesh mold 12, and the nozzle 40 is gradually lowered while spraying the stock 10 onto the inner surface of the rotating wire mesh mold 12.

As a result, the paper stock 1O adheres to the inner surfaces A, B, C, and D, and since the wire mesh mold 12 is rotating, the water content 10
A is dehydrated to the outside through the mesh by centrifugal force. After the paper stock 10 has been dehydrated to such an extent that it does not slip off, the paper stock 10 is also sprayed onto the bottom surface E using the same nozzle 22A as in the second embodiment. At this time, the spray is also applied to the corners around the bottom surface E so that the fibers are continuously entangled and bonded to the stock 10 attached to the inner surfaces A, B, C, and D. When the whole is sufficiently dried, it will shrink a little and the three-dimensional paper can be easily peeled off from the wire mesh mold 12, completing the three-dimensional paper with the same shape as shown in Fig. 12 (1) without any joints. .

Here, regarding the wire mesh mold having a complicated shape, the wire mesh mold can be made into split molds to make it easier to take out the completed three-dimensional paper after drying. In addition, when spraying the paper stock lO onto the bottom surface, the rotational speed of the wire mesh mold 12 is appropriately reduced to prevent the paper stock 10 from shifting due to centrifugal force, and continuous spraying can be performed while the wire mesh mold 12 is kept rotating. becomes possible.

According to the third embodiment, in addition to having the same effects as the second embodiment, since the paper stock 10 is sprayed without rotating the wire mesh mold 12, the dewatering action is accelerated and the production time is further reduced. This makes it possible to further reduce manufacturing costs.

Next, a modification as a three-dimensional type will be explained based on FIGS. 9 to 11.

The wire mesh mold 50 in FIG. 9 is formed into a box shape as a whole, but the bottom surface 50E is closed from the beginning, while the top surface 50E is closed from the beginning.
0F is open. And the sides 50A, 50B,
50C and 50D have rectangular lids 50FA and 50F covering the upper surface 50F.

50FC and 50FD are each formed integrally.

The spaces between these lids are as shown by arrow P (by providing each lid with a slight inclination to each side, they are spaced apart from the beginning and the cutting process after manufacturing the three-dimensional paper is omitted. By using such a wire mesh mold 50 and manufacturing three-dimensional paper as in each of the above embodiments, it is possible to integrally form the lid required only on the top surface. The manufacturing process is simplified by the amount of assembly.Here, Q a, Q *, Q
c, Q.

is the bent part.

Moreover, in FIG. 10, the lid shown in FIG. 9 is formed as shown on both the top surface 52F and the bottom surface 52E as necessary. This also allows the box body to be manufactured directly from the wire mesh mold 52 without the need for cutting and assembling the entire box like a normal cardboard box.

Furthermore, in FIG. 11, by fixing protrusions 56, 56 of a predetermined height to a part of the wire mesh mold 54, the protrusions 56, 56 can be provided without difficulty in penetrating the manufactured three-dimensional paper. This eliminates the need to newly provide a penetration for the handle portion of a paper bag for carrying, contributing to the simplification of the manufacturing process.

In each of the above embodiments, three-dimensional paper is manufactured from Western paper using mechanical pulp. However, at the paper stock stage, resin fibers for Japanese paper or synthetic fibers with long fibers (such as nylon or vinylon) may be used. It is also possible to strengthen the intertwining of the fibers by mixing them, making it easier to form continuous corners and making stronger three-dimensional paper. Of course, it is also possible to produce three-dimensional washi paper made from plants such as mulberry and mimmata.

It is.

Furthermore, in each of the above embodiments, a case where a three-dimensional paper having a rectangular parallelepiped shape is manufactured is illustrated, but the present invention is not necessarily limited to this, and the present invention may also be applied to a three-dimensional paper having an internal space such as another polyhedron or a spherical shape. Alternatively, in that case, one or more openings may be provided at predetermined locations.

Further, in each of the above embodiments, a 2.4-mesh stainless steel wire mesh was used as the wire mesh mold, but the present invention is not necessarily limited to this, and the mesh size may be changed as necessary, and the material may also be changed. Instead of a wire mesh, it may be a hole-shaped member such as a punching plate, or it may be a porous member.

〔Effect of the invention〕

As described above, according to the present invention, a porridge-like paper stock containing plant fibers is attached to a predetermined surface of a three-dimensional mold made of hole-like members formed into a three-dimensional shape, and then the attached paper stock is spread almost uniformly. The process of drying and semi-drying is repeated sequentially along the three-dimensional mold, and the surfaces are continuously bonded by fiber bonding, and after the entire adhered paper material has dried, the paper material is removed from the three-dimensional mold. We have adopted a method such as manufacturing three-dimensional paper with an internal space by separating the adhered paper stock, so we can directly manufacture three-dimensional paper from paper stock without joining parts such as glue allowances or seams. As a result, it is possible to provide an excellent method for manufacturing three-dimensional paper that not only eliminates the step required for the joining, but also saves raw materials only for the joining portion, resulting in resource conservation.

[Brief Description of the Drawings] Figures 1 to 4 are explanatory diagrams of the manufacturing method according to the first embodiment of the present invention, and Figures 5 to 7 are explanatory diagrams of the manufacturing method according to the second embodiment of the present invention. 8 is an explanatory diagram of the manufacturing method according to the third embodiment of the present invention, FIGS. 9 to 11 are perspective views showing modified examples of the wire mesh type, and FIGS. 12 (1) to 12
FIG. 7 is a perspective view showing a conventional example of three-dimensional paper. 10.--1--Paper stock, 12. 50. 52.
54-----------Wire mesh type as a three-dimensional type. Figure 8 Figure 12

Claims (3)

[Claims] (1) An operation in which a porridge-like paper stock containing plant fibers is attached to a predetermined surface of a three-dimensional mold made of hole-shaped members, and then the adhered paper stock is made approximately uniform and semi-dried. While repeating this sequentially along the three-dimensional mold, the surfaces are continuously joined by fiber bonding, and after the entire adhered paper stock is dried, the adhered paper stock is separated from the three-dimensional mold. A method for producing three-dimensional paper, characterized by producing three-dimensional paper having a three-dimensional shape and having an internal space. (2) After spraying a porridge-like paper material containing plant fibers in a substantially atomized form onto each predetermined surface of a three-dimensional mold made of hole-shaped members, the sprayed paper material is applied with a pressing plate. While holding the three-dimensional mold, the surfaces constituting the three-dimensional mold are continuously bonded by the bonding of the fibers, and then the entire sprayed paper stock is dried and the sprayed paper stock is separated from the three-dimensional mold. A method for producing three-dimensional paper, characterized by producing three-dimensional paper having a three-dimensional shape and having an internal space. (3) While rotating the three-dimensional mold, a porridge-like paper material containing plant fibers is sprayed in a substantially mist form onto a three-dimensional mold in which a hole-shaped member is formed into a three-dimensional shape, and after drying, A method for producing three-dimensional paper, characterized in that three-dimensional paper having a three-dimensional shape having an internal space is produced by separating the sprayed paper stock from the three-dimensional mold.