JP4126956B2 - Method of forming paper drawing molded article, paper drawing molded article produced by the processing method, and covering lid made of the molded article - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper drawing product, a paper drawing product produced by the processing method, and a cover made of the molding.
[0002]
[Prior art]
Conventionally, paperboard has been squeezed with a pair of male and female press dies to give three-dimensionality and used for trays, paper plates, lids and the like.
If this drawing process is described concretely, for example, as shown in FIG. 5, a blank sheet (2) to be drawn is placed on a female mold (1), and a blank is formed with a pressing mold (3). After pressing the peripheral edge of the sheet, the male mold (4) was pushed into the female mold (1), and the blank sheet was squeezed to produce a three-dimensional tray or paper plate as a paper drawn product (10). . Further, the male mold and the female mold were heated as necessary.
[0003]
However, since a three-dimensional container with a depth is formed by using a pressing mold with a flat surface, irregular wrinkles (7) occur particularly in the corner portion where the paper fiber is close to one place. It did not look good (see FIGS. 6A, 6B, and 6C).
[0004]
[Problems to be solved by the invention]
The present invention has been made in order to solve the above-mentioned problems that occur when drawing paperboard, and it is possible to make a good-looking paper by regularly generating wrinkles that occur when drawing paperboard. It is an object of the present invention to provide a drawing processing method of a drawn product, a paper drawn product manufactured by the processing method, and a cover made of the molded product.
[0005]
[Means for Solving the Problems]
In the invention of claim 1 of the present invention, a blank sheet is placed on a female mold, and after pressing the periphery of the blank sheet with a pressing mold whose center is open so that the male mold can pass, In the method of forming a paper drawn molded article that is pressed against a female die and drawn , the width is 2 mm from the outer peripheral edge toward the inner substantially central direction only at the corner portion of the surface that comes into contact with the blank sheet . A drawing method for a paper drawn product, wherein drawing is performed using a pressing die having a groove having a depth of 1 mm and a length of 20 mm .
[0006]
As described above, according to the first aspect of the present invention , the width 2 mm, the depth 1 mm, and the length 20 mm are provided only from the outer peripheral edge toward the inner central direction only at the corner portion of the surface that the blank sheet contacts. Since the drawing process is performed using a holding die in which a groove is drilled, the wrinkles caused by the misalignment of the paper that occur during the drawing process will occur regularly in this groove, making it a good-looking paper drawing molding Goods are obtained.
[0007]
Further, the invention of claim 2 is that a blank sheet is placed on a female mold, and the periphery of the blank sheet is pressed by a pressing mold whose center is open so that the male mold can pass through. pressing the mold, in the molding method of the paper diaphragm molded article drawing, only the corner portions of the surface towards which the blank sheet is in contact, towards the outer periphery substantially in the center direction of the inner width 2 mm, a depth A drawing method for a paper drawn product, wherein the drawing is performed using a female die having a 1 mm long and 20 mm long groove.
[0008]
As described above, according to the invention described in claim 2 , the width is 2 mm, the depth is 1 mm, and the length is 20 mm only from the outer peripheral edge toward the inner central direction only at the corner portion of the surface that the blank sheet contacts. Since the drawing process is performed using a female die with a groove, the wrinkle caused by the paper misalignment that occurs during the drawing process enters into the groove and occurs regularly, making it a good-looking paper drawing process. Goods are obtained.
[0009]
A third aspect of the present invention is a paper draw-molded article produced by using the molding method according to the first or second aspect.
[0010]
Furthermore, the invention of claim 4 is the paper draw-formed product according to claim 3, wherein the paper draw-formed product is a cover lid.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A method for forming a paper drawn product of the present invention will be described in detail below based on an embodiment.
1A, 1B, and 1C are schematic explanatory views showing an example of a drawing process.
A blank sheet (2) is placed on the female mold (1), and the peripheral edge of the blank sheet (2) is pressed by a pressing mold (3) whose center is open so that the male mold can pass through. In the molding method of the paper drawn product (10) for pressing the die (4) against the female die (1) and drawing, only the corner portion (5) on the surface that the blank sheet (2) contacts, A method for forming a paper drawn product (10), which is drawn using a pressing die (3) having a groove (6) of an appropriate length drilled from the outer peripheral edge toward the inner substantially central direction. It is.
[0012]
As the blank sheet (2), a paper board such as a cup base paper, ivory, double-sided card, etc., which is rich in drawing processability, can be preferably used.
You may use the composite paper which provided the thermoplastic resin layers, such as polyethylene and a polypropylene, on the single side | surface or both surfaces of these paperboards.
[0013]
The groove (6) drilled in the presser mold (3) is suitable for only the corner portion (5) on the surface with which the blank sheet (2) comes into contact, from the outer peripheral edge toward the inner substantially central direction. Provided in length.
More specifically, when a paperboard having a thickness of about 0.35 mm is formed by drawing, it is desirable that the width of the groove is about 2 mm, the depth is about 1 mm, and the length is about 20 mm.
[0014]
Further, if the female mold and the male mold are heated to about 100 ° C. during the drawing process, the drawing can be performed without difficulty.
[0015]
By performing the drawing process using such a holding die (3), wrinkles caused by the paper misalignment at the corners during the drawing process enter the groove (6) and are regularly generated. This will improve the cosmetics.
[0016]
The groove (6) can be provided in the female die (1) instead of being provided in the holding die (3).
That is, a blank sheet is placed on a female mold, and after pressing the peripheral edge of the blank sheet with a pressing mold, the male mold is pressed against the female mold, and a drawing process for a paper drawn product for drawing is performed. A female die (1) in which a groove (6) of an appropriate length is bored only from the outer peripheral edge toward the inner central direction only in the corner portion (5) on the surface with which the sheet (2) contacts. This is a method of forming a paper draw-formed product (10) that is drawn using (see FIGS. 2 (a), (b), and (c)).
[0017]
Next, a cover lid, which is one of paper drawn products manufactured using the drawing method of the present invention, will be described.
[0018]
FIG. 3A is a development explanatory view of a blank sheet showing an embodiment of a covering lid produced by using the drawing method according to the present invention.
A side plate (13) and a second side plate (14) are successively arranged from each side of the octagonal top plate (11) via a folding line (a).
[0019]
A ruled line (k) having an appropriate length is provided from each corner (corner portion) of the top plate (11) toward the substantially central portion on the inside.
Joining pieces (131) are connected to both end edges of the side plate on the remote side via a fold line.
[0020]
When this blank sheet is drawn by the drawing method described above, the male die is pressed against the female die while pressing the peripheral edge of the blank sheet with the female die and the frame-like holding die as shown in FIG. The peripheral edge of the top plate (11) is squeezed and subjected to a drawing process (11a), and wrinkles due to the misalignment of the paper generated in the corner portion are induced by the ruled line (k) provided in the corner portion, and are pressed. It enters into the groove provided in the case, and is regularly generated, so that a good-looking product can be obtained.
[0021]
The blank sheet subjected to the drawing process is bent along the folding line, and the joining piece (131) is overlapped on the inner side of the adjacent side plate (13), and the inner surface side and the side plate (13) of the second side plate (14). When adhering to the inner surface side, the side plates adjacent to each other are bonded to the second side plate by a joining piece to form a peripheral wall hanging from the periphery of the top plate, and the central portion has a raised top plate A covering lid is completed (see FIGS. 4A and 4B).
[0022]
The means for adhering the inner surfaces of the side plate (13) and the second side plate (14) is not particularly limited, but a heat seal method, glue bonding, hot melt bonding, or the like may be properly used depending on the material used.
[0023]
【The invention's effect】
As described above, the paper draw-molded product produced by using the paper draw-molded product molding method of the present invention has improved cosmetic properties due to the regular wrinkle shape.
If there is a box making process after drawing, mechanical suitability is improved.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 shows an example of a state in which a drawing process is performed by the paper drawing product of the present invention, (a) is a perspective explanatory view, and (b) is an A view of (a). It is -A 'sectional explanatory drawing, (c) is a perspective explanatory drawing of a draw-formed product.
FIGS. 2A and 2B show another embodiment in a state of being drawn by the paper drawing product forming method according to the present invention, FIG. 2A is a perspective explanatory view, and FIG. 2B is a perspective view of FIG. It is AA 'line sectional explanatory drawing, (c) is a perspective explanatory drawing of a draw-formed product.
FIGS. 3A and 3B show an embodiment of the paper drawn product of the present invention, in which FIG. 3A is a development explanatory view, and FIG. 3B is a development explanatory view of the state in which FIG. .
4A is a plan explanatory view of the cover lid shown in FIG. 3, and FIG. 4B is a cross-sectional explanatory view taken along line AA ′ of FIG.
FIG. 5 is a schematic explanatory view showing an example of a drawing process.
6A and 6B are perspective views illustrating a state in which a drawing process is performed by a conventional paper drawing product forming method. FIG. 6B is a perspective explanatory view, and FIG. It is explanatory drawing, (c) is a perspective explanatory drawing of a draw-formed product.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Female type 2 ... Blank sheet 3 ... Holding type 4 ... Male type 5 ... Corner part 6 ... Groove 7 ... Wrinkle 10 ... Paper drawing molded article 11 ... Top plate 11a ... Top plate Drawing part 13 ... Side plate 14 ... Second side plate 131 ... Joint piece a ... Bending line k ... Ruled line

Claims (4)

A blank sheet is placed on a female mold, and the peripheral edge of the blank sheet is pressed with a pressing mold whose center is open so that the male mold can pass through. Then, the male mold is pressed against the female mold and drawn. In the method of forming drawn products,
Using a pressing die in which grooves having a width of 2 mm, a depth of 1 mm, and a length of 20 mm are perforated only from the outer peripheral edge toward the inner central direction only at the corner portion of the surface to which the blank sheet comes into contact. A method of forming a paper drawn product, characterized by drawing. A blank sheet is placed on a female mold, and the peripheral edge of the blank sheet is pressed with a pressing mold whose center is open so that the male mold can pass through. Then, the male mold is pressed against the female mold and drawn. In the method of forming drawn products,
Using a female die in which grooves having a width of 2 mm, a depth of 1 mm, and a length of 20 mm are perforated only from the outer peripheral edge toward the inward central direction only at the corner portion of the surface on which the blank sheet contacts. A method of forming a paper drawn product, characterized by drawing.   A paper draw-molded product produced by using the molding method according to claim 1 or 2.   4. The paper drawn product according to claim 3, wherein the paper drawn product is a cover lid.

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