JPH08244146A - Bending ruled-line working method and thermoplastic resin sheet having bending ruled-line - Google Patents

Abstract

PURPOSE: To provide a method for working bending ruled-lines with which a sheet having bendable property can be obtained easily, and a thermoplastic resin sheet having bending ruled lines which can be obtained by the above- mentioned method. CONSTITUTION: A device to be used comprises a cradle 11, a latticed gauze 12, and a ruling blade 13. The gauze 12 is formed of wire rods 14 braided laterally and longitudinally. The ruling blade 13 is arranged directly above one longitudinal or lateral wire rod 14 in the direction along this wire rod 14. By using this device, a thermoplastic resin sheet 15 is placed on the gauze 12, the ruling blade 13 is lowered so as to press the resin sheet 15. Thus, on one face of the resin sheet 15, a first bending ruled-line on which the ruling blade 13 is transferred is formed. On the other face of the resin sheet 15, a second bending rule-line on which the wire rod 14 is transferred is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding ruled line processing method and a thermoplastic resin sheet containing a folded ruled line, and can be used, for example, for producing a clear box made of a thermoplastic resin sheet.

[0002]

BACKGROUND ART AND PROBLEMS TO BE SOLVED BY THE INVENTION For example,
In order to obtain easy bending when manufacturing the clear box,
Bending ruled lines are applied to the thermoplastic resin sheet.
A conventional general ruled line is a thermoplastic resin sheet in which concave grooves are formed.

In addition, a plastic sheet with a fold line in which a groove having a discontinuous V-shaped cross section is formed in an inverted trapezoidal groove in order to provide easy bending and right-angled uprightness has been proposed (Act 4). -9345). In the case of the plastic sheet containing a folding line, an expensive ruled line blade is required because the ruled line blade itself processed into a special shape is used. Moreover, in order to change the depth and shape of the ruled line, another ruled line blade corresponding to the change is required, which makes it difficult to change easily.

Therefore, an object of the present invention is to provide a folding ruled line processing method by which a sheet having an easy folding property can be easily obtained, and a thermoplastic resin sheet containing a folded ruled line obtained by the method.

[0005]

In the folding ruled line processing method according to the first aspect of the present invention, the ruled line blade is arranged on one surface side of the thermoplastic resin sheet and the grid-like member is formed on the other surface side. Are arranged, and the resin sheet is sandwiched between the ruled line blade and the grid-like member and pressed to form a first bent ruled line on one surface side of the resin sheet, and on the other surface side of the resin sheet. A second bent ruled line is formed.

As the ruled line blade, a commonly used blade having a U-shaped cross section, a V-shaped cross section, an inverted trapezoidal shape, or the like can be used. By forming the folding ruled lines on the resin sheet in this manner, a normal first folding ruled line is formed on one surface side of the resin sheet by transfer of a ruled line blade, and at the other surface side of the resin sheet. A second bent ruled line is formed by transferring the lattice-shaped member.

A method for processing a folding ruled line according to a second aspect of the present invention is the method according to the first aspect, wherein the ruled line blade is provided along one lattice material which forms the lattice-like member and is either vertical or horizontal. It is characterized by being arranged.

In the bending ruled line machining method according to the third aspect of the present invention, in the first aspect, the ruled line blades are arranged obliquely with respect to the vertical and horizontal lattice members forming the lattice member. Is characterized by.

A bending ruled line processing method according to a fourth aspect of the present invention is characterized in that, in any one of the first to third aspects, the lattice member is a lattice metal net. The lattice-shaped wire mesh, for example, the mesh is 20 ~ 200, the wire diameter is 0.05 ~ 0.5.
mm can be used. Further, as the material, it is preferable to use durable stainless steel.

The thermoplastic resin sheet with folding ruled lines according to the fifth aspect of the present invention is obtained by the folding ruled line processing method according to any one of the first to fourth aspects of the invention.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the apparatus used in this folding ruled line processing method is a pedestal 11, a grid-like wire mesh 12 which is a grid-like member installed on the upper surface of this pedestal 11, and this wire mesh.
A ruled line blade 13 arranged above 12 and a vertical moving mechanism (not shown) for the ruled line blade 13 are provided.

The wire net 12 is made of stainless wire 14 which is a lattice material and is knitted in length and width. In the case of this embodiment, the mesh of the wire mesh 14 is 60 in both length and width,
You can select from 200. The wire diameter of the wire 14 is 0.1 mm, but it can be 0.05 to 0.5 mm. The ruled line blade 13 is a so-called Thomson blade whose end is ground to be flat. The width of the tip portion is approximately 0.1 mm, which corresponds approximately to the wire diameter of the wire 14. And
The ruled line blade 13 is arranged right above one vertical or horizontal wire rod 14 in a direction along the wire rod 14.

Using this apparatus, a folding ruled line is formed on the thermoplastic resin sheet 15 as follows. As shown in FIGS. 1 and 2, a polypropylene thermoplastic resin sheet 15 having a thickness of 0.3 mm is placed on the wire net 12, and the ruled line blade 13 is moved downward to press the resin sheet 15. A thermoplastic resin sheet 15 is obtained.

By the pressing by the ruled line blade 13, a first bent ruled line 16 to which the ruled line blade 13 is transferred is formed on one surface side of the resin sheet 15, and a wire rod is formed on the other surface side of the resin sheet 15. A second bent ruled line 17 to which 14 is transferred is formed. As shown in FIG. 4, the first folding ruled line 16
Is a trapezoidal cross section corresponding to the shape of the tip of the ruled line blade 13. On the other hand, as shown in FIGS. 3 and 4, the second bent ruled line 17 includes a continuous semicircular groove 18 and a vertical or horizontal wire rod 14 formed by transferring one vertical or horizontal wire rod 14. It has a discontinuous dish-shaped groove 19 formed by transfer of orthogonal wire rods 14.

Bending ruled lines 16 and 1 obtained by this embodiment
When the physical properties of the thermoplastic resin sheet 15 containing 7 were measured, the bending stress was 0.90 N / 10 cm and the tearing stress at the ruled line portion was 3.73 N. On the other hand, as a comparative example, in the case of a plastic sheet with a folding line obtained by using a ruled line blade processed into a special shape, in which a groove having a discontinuous V-shaped cross section is formed in a groove of an inverted trapezoid Is 0.98 N / 10c
The tearing stress of the m and ruled lines was 3.43N. Therefore, according to the present embodiment, the thermoplastic resin sheet 15 containing the folding ruled lines 16 and 17 having the same or better physical properties than the method according to the comparative example can be obtained by a simpler method.

Since the resin sheet 15 containing the folding ruled lines 16 and 17 of this embodiment has the discontinuous dish-shaped groove 19 in the second folded ruled line 17, the resin sheet 15 is formed along the ruled lines 16 and 17. The resin sheet 15 can be bent and the bent resin sheet 15 can be erected at a right angle.

Further, since the resin sheet 15 of this embodiment has the second folding ruled line 17 formed on the back surface in addition to the first folding ruled line 16, the first folding ruled line is provided.
It can be folded more easily than a thermoplastic sheet with only 16 formed.

In the resin sheet 15 of this embodiment, the second folding ruled line 17 was formed, but the tear resistance and impact resistance were good without any problems. Further, since it is only necessary to install the wire net 12 under the normal ruled line blade 13 and the processed ruled line blade itself is not used, the folding ruled line of this embodiment is inexpensive and simple.
A resin sheet 15 containing 16 and 17 is obtained.

Next, a second embodiment of the present invention will be described with reference to FIG. In the case of the first embodiment, the ruled line blade 13 is arranged immediately above one wire 14 and along the wire 14.
The ruled line blades 13 of this embodiment are arranged in a direction along a diagonal line connecting the intersections of the vertical and horizontal wire rods 14.

As shown in FIG. 5, as in the first embodiment,
The thermoplastic resin sheet 15 obtained by lowering the ruled line blade 13 and pressing the resin sheet 15 has a first folding ruled line 16 formed on one surface side as in the first embodiment. Then, as shown in FIG. 5, a second bent ruled line 17 to which the intersection portion of the wire 14 is transferred is formed on the other surface side. The second folding ruled line 17 has cross-shaped grooves 21 formed discontinuously.

The effect similar to that of the first embodiment can be obtained also by the resin sheet 15 containing the folding ruled lines 16 and 17 of the present embodiment.
In particular, since the second folding ruled line 17 is formed on the back surface in addition to the first folding ruled line 16, the resin sheet 15 can be more easily folded. Further, due to the second folding ruled line 17, it also has a right-angled standing property.

In the present invention, the wire mesh 12 of the ruled line blade 13 is used.
The arrangement angle with respect to is not limited to the case of the above-described embodiment, and the arrangement angle of the ruled line blade 13 with respect to the wire net 12 may be arbitrarily adjusted, whereby the shape of the second bent ruled line 17 can be changed. Further, by using a mesh other than the above-mentioned mesh and a metal mesh having a wire diameter as the lattice member, the number, length, pitch, depth, etc. of the grooves of the second folding ruled line 17 can be changed.

Further, in the above embodiment, the wire mesh 12 knitted with the wire material 14 is used as the grid-like member, but if the wire mesh 12 has the same surface shape as the wire mesh 12, it is composed of the grid material other than the wire material. Members may be used. For example, it is possible to use a lattice member integrally molded with resin or metal so as to have the same surface shape as the wire net 12.

[0024]

According to the folding ruled line processing method of the present invention, the ruled line blade is arranged on one surface side of the thermoplastic resin sheet and the grid-like member is arranged on the other surface side to perform the bending ruled line processing. Since it is applied, it is possible to easily obtain a thermoplastic resin sheet with folding ruled lines.

Further, in the obtained thermoplastic resin sheet containing folding ruled lines, the first folding ruled lines are formed on one surface side of the resin sheet, and the grid-like member is transferred to the other surface side of the resin sheet. Since the second folding ruled line is formed, it has a good easy folding property.

[Brief description of drawings]

FIG. 1 is a perspective view of an apparatus used in a folding ruled line processing method according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a method for processing a folding ruled line according to the first embodiment.

FIG. 3 is a plan view of the thermoplastic resin sheet with folding ruled lines obtained in the first embodiment.

FIG. 4 is a sectional view taken along the line AA ′ of FIG.

FIG. 5 is a plan view of a thermoplastic resin sheet with folding ruled lines obtained in the second embodiment of the present invention.

[Explanation of symbols]

 12 Lattice wire mesh which is a lattice member 13 Ruled line blade 14 Wire rod which is a lattice material 15 Thermoplastic resin sheet 16 First bent ruled line 17 Second bent ruled line

Claims (5)

[Claims] 1. A ruled line blade is arranged on one surface side of a thermoplastic resin sheet, and a grid member is arranged on the other surface side, and the resin sheet is sandwiched and pressed between the ruled line blade and the grid member. Then, a first folding ruled line is formed on one surface side of the resin sheet, and a second folding ruled line is formed on the other surface side of the resin sheet. 2. The folding ruled line according to claim 1, wherein the ruled line blade is arranged along one lattice member which is one of a vertical direction and a horizontal direction and which constitutes the lattice member. Processing method. 3. The folding ruled line machining method according to claim 1, wherein the ruled line blades are arranged obliquely with respect to the vertical and horizontal lattice members forming the lattice member. 4. The folding ruled line processing method according to claim 1, wherein the lattice member is a lattice metal net. 5. A thermoplastic resin sheet containing a folding ruled line obtained by the method for processing a folding ruled line according to any one of claims 1 to 4.