JPH0577495B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a thermal blade used in manufacturing a welding box made by welding thermoplastic resin plates, and more specifically, the present invention relates to a heat blade used in manufacturing a welding box made by welding thermoplastic resin plates, and more specifically, The present invention relates to a thermal blade used when manufacturing a fusion box that is formed in a raised bottom shape at a position one step higher than the lower end surface.

<Prior art> Conventionally, when manufacturing a fused box in which the bottom plate is raised to a higher position than the lower end surfaces of the side plates, unnecessary ear portions S6 are removed in advance as shown in FIG. The asymmetrical V-shaped thermal blade shown in FIG. 8 (FIG. 9) is attached to the outer periphery of the bottom plate of the plate material S, which has been cut out and a portion S5 corresponding to the bottom plate is formed one step higher than the lower end surface of the outer periphery of the bottom plate. 1, 2, 3, and 4 are pressed against each other to form bending grooves V1, V2, V3, and V4 as shown in Fig. 6, and the adjacent ends of the side plates are connected to each corner part 9 of the V-shaped heat blade and the corner heat blade. 5, 6, 7, and 8.

The hot blades used for melting these are made up of left-right asymmetrical V-shaped hot blades 1, 2, 3, and 4 arranged in a digit shape, as shown in Figure 8, and the corner hot blades 5 to 8 are used to form parallel plates. The structure was arranged so that By using this hot blade, a good raised bottom fused box could be obtained. However, when the thickness of the plate material increases and the smaller angle A of the asymmetrical V-shaped heating blade stands up very small compared to the large angle B, one side of the adjacent end of the side material, that is, the left-right asymmetrical There was a problem in that the melting margin on the smaller angle side of the V-shaped hot blade was small, and the welding angle at the part where the side plates were welded during box manufacturing was poor, making it impossible to obtain a good box.

<Problems to be Solved by the Invention> The present invention was made to solve the above-mentioned problems, and an object thereof is to provide a thermal blade that can manufacture a raised bottom fused box with good fusion between side plates. shall be.

<Means for Solving the Problems> In order to solve the above problems, the configuration of the thermal blade according to the present invention is such that a plurality of side pieces provided on the outer periphery of a bottom plate for forming a welding box are bent upward and erected. A hot blade part for forming a bending groove to make the sheet material melt, and a corner hot blade part that extends from this hot blade part and melts only one side of the adjacent side edges of the side pieces of the plate material for the welding box. It is provided as a long linear thermal blade forming the target V-shape, and has a short linear corner thermal blade that melts the adjacent side ends and the other side of the side pieces of the fusion box plate material, and furthermore, It is characterized in that an auxiliary blade is provided adjacent to the corner heating blade part of the V-shaped heating blade on the side where the angle is smaller.

<Function> According to the above configuration, the welding margin at one end of the side of the plate material can be improved by the auxiliary blade, and the welding angle at the part where the side plates contact each other can be made good, resulting in a sufficiently fused weld. You can get the box.

<Example> Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 shows the entirety of a hot melting blade G according to the present invention, which has a built-in heater 10 and is assembled in a parallel grid shape.

This melting hot blade is an asymmetrical V-shaped hot blade 1.
1, 12, 13, and 14, and together with the V-shaped hot blades 11, 12, and 13, short symmetrical V-shaped corner hot blades 15, 16,
17 and 18 are provided. Furthermore, the left-right asymmetrical V
Auxiliary blades 21, 22, 23, 24 are provided adjacent to the side e where the angle of the character-shaped thermal blades 11, 12, 13, 14 is smaller. The above-mentioned left-right asymmetrical V-shaped thermal blade 11,
Among 12, 13, and 14, thermal blade part 1 for forming the bending groove
2a, 13a, 14a, and 15a are a plurality of side pieces S provided on the outer periphery of the bottom plate S5 of the fusion plate S.
1. Melting and forming bending grooves V1, V2, V3, and V4 for bending and standing S2, S3, and S4 upward, and forming the above-mentioned hot blade parts 11a, 12a, 13a, and 14a.
Corner hot blade parts 11', 12', 13' extending from
14' are the side pieces S1, S2, S3,
Only one side of the adjacent side ends of S4 is melted. Further, the symmetrical V-shaped corner heating blades 15, 16, 17, and 18 are used to melt the other side of the adjacent side ends of the side pieces S1, S2, S3, and S4 of the plate material S for the welding box. Furthermore, the auxiliary blades 21, 2
2, 23, 24 are sides e with smaller angles formed by the asymmetrical V-shaped corner heat blades 11, 12, 13, 14.
This is to prevent the melting margin from decreasing and increase the melting margin.

The auxiliary blades 21, 22, 23, and 24 are attached to move together with the V-shaped thermal blades 11, 12, 13, and 14, and the auxiliary blades themselves do not have a built-in heater. 12, 13, 14
It conveys more heat. However, it is also possible to incorporate a heater or to respond to the movement of the hot blade without directly attaching it to the hot blade.

In addition, the materials of each blade include aluminum, iron,
Any material such as stainless steel, copper, ceramics, etc. may be used. The angle of the auxiliary blade 22 is represented by angle C shown in FIG. 2, and is preferably around 30 degrees. This is because when the b angle is close to this angle, there is no need for an auxiliary blade. Also corner heat blade 15,1
6, 17, 18 protrude downward by h ₁ from the thermal blades 11, 12, 13, 14, and are auxiliary blades 21, 22,
Although 23 and 24 do not protrude, the protrusion height of the auxiliary blade may be equal to _h1 .

FIG. 4 shows the state in which the hot melting blades 1 arranged in a grid pattern are pressed against the welding box plate material S made of thermoplastic resin.

The plate material S for the fusion box made of thermoplastic resin is the fifth
As shown in the figure, four side pieces S1, S2, S3, and S4 are provided on the outer periphery of the bottom plate S5.

Plate materials S, bottom plate S5, and side pieces S1, S for the early fused box
2. Heat blade part 1 for forming a bending groove at the boundary between S3 and S4
When 1, 12, 13, and 14 are pressed against each other, the bending groove forming groove is set at a temperature that allows a groove of a predetermined depth to be melted and formed on the welding box plate material S by heating with the built-in heater 10. Thermal blade parts 11, 12, 13, 14
However, the bottom plate S5 and the side pieces S1, S of the plate material S for the fusion box
2, grooves V1, V2, V3 at the boundary with S3, S4,
V4 is melt-formed, and the side end C1 of the side piece is melt-formed.
b, C2b, C3b, C4b as the hot blade parts 11, 1
Corner heat blade part 1 extended from 2, 13, 14
1', 12', 13', and 14', and is a hot blade 1 for forming bending grooves on the lower surface of the plate material S for the fusion box.
1, 12, 13, 14 and the corner heating blade parts 11', 12' extending from these heating blade parts.
The distance _h1 between the lower ends of the bending grooves 13' and 14' is the wall thickness that must be maintained because the bending groove forming thermal blade parts 11, 12, 13, and 14 are for forming bending grooves. It's a minute.

On the other hand, melting corner hot blade parts 15, 16, 17, 18 are pressed against one side end C1a, C2a, C3a, C4a of the side pieces S1, S2, S3, S4, and are heated by the built-in heater 10. Side end C1
a, C2a, C3a, and C4a.

Next, to partially explain the melting action of the auxiliary blades 21, 22, 23, and 24, FIG.
The hot blade 3' is attached to the side end S8 of the side piece immediately after cutting 6.
In the state in which is pressed, the side plate end S8 of the plate material is melted by the auxiliary blade 22, and a side end C2b with a melted surface is obtained. The angle f of the side end C2b formed by the melting surface is preferably about 45°. Further, the use of this auxiliary blade is very effective when the thickness t of the material is about 5.5 mm or more and the angle e on the smaller side e of the asymmetric heat blade is about 7° or more.

In this way, the grooves V1, V2, V3, and V4 are melted and formed, and the side end portions C1a, C2a, and C3 are formed by melting.
a, C4a and side ends C1b, C2b, C3b, C
FIG. 6 shows the plate material S for a welded box in a state in which 4b is melted.

Note that the area of the melting surface caused by each heating blade is adjusted by the temperature of each heating blade.

Further, the present invention is not limited to the above embodiments, and various design changes can be made without changing the gist of the invention.

For example, in this example, the one with four side pieces is shown, but this is a hot melting blade made by incorporating the same number of hot melting blades as the side pieces into three or five or more pieces of fusing box plate material. By using this, it is possible to manufacture a welded box with a desired shape (desired polygon).

Next, a method for manufacturing a rectangular welding box using the hot melting blades 1 of the present invention arranged in a cross-shaped structure will be described with reference to FIG.

A plate material S for a fusion box made of thermoplastic resin is supplied to a box making section D where a hot blade G for melting is provided.

The plate material S for the fusion box is formed of a plate material made of foamed or non-foamed thermoplastic resin such as polypropylene, polystyrene, polyethylene, etc., and the bottom portion S5 has side pieces S1, S2, S3,
The plate material S for the fusion box is heated and molded in advance so that it is positioned one step higher than S4.

Next, both the front and back sides of the plate material S for a fused box supplied to the box making section D are clamped by a pair of clamp plates P1 and P2, and the hot blades G for melting arranged in a grid shape are pressed against them.

And a hot melting blade G as shown in Figure 1.
are the thermal blade portions 11a, 12a, 13 for forming bending grooves.
a, 14a are V-shaped grooves V1, V2, V3, V4
corner thermal blade parts 11', 12', 13', which extend from the thermal blade parts 11, 12, 13, 14;
14' is one side end C1 of the side pieces S1, S2, S3, S4 together with the auxiliary blades 21, 22, 23, 24.
b, C2b, C3b, and C4b are formed as melting surfaces, and linear melting corner thermal blade parts 15, 16, 1
7 and 18 form the side end portions C1a, C2a, C3a, and C4a of the side pieces S1, S2, S3, and S4 as melting surfaces.

Each groove V1, V2, V3, V4 around the bottom plate _S5 and the fused surfaces C1a, C2a, C3a, C4a, C at the side edges
1b, C2b, C3b, and C4b, the hot blade A for melting is moved backward, and the clamp plates P1 and P2 are moved downward while holding the plate material S for the welding box in the mold T. Plate material S for fusion box in open state
Insert.

As a result, 4
The side pieces S1, S2, S3, S4 of the molding die T
It is bent upward along the inner wall T1 of the grooves V1, V2, V3, and V4 as base lines. At the same time, the adjacent molten side ends of the side pieces S1, S2, S3, and S4 are fused together to form a bottom-up fused box H with an open top.

<Effects of the invention> As described above, the melting hot blade according to the present invention has the advantage that the asymmetrical V-shaped hot blade can be used for fusing for forming the side grooves of the plate material for the welding box using the hot blade. By adding an auxiliary blade to the smaller angle side of the asymmetrical V-shape, it is possible to maintain sufficient melting margin, since some parts of the melting margin may be insufficient due to the shape. Become.

Therefore, if the plate material is thick and the angle of the V-shaped heating blade for bending is very steep, the fusion of the side pieces will be good and a good box will be produced.

2 The angle of welding between the side pieces is 45°, making it strong and resistant to holes.

3. Can accommodate the thickness of the plate material and the angle of the V-shaped hot blade.

In addition, the fusion box manufactured using the thermal blade for melting of the present invention has a good fusion state with less interference of heat by the thermal blade for forming bending grooves.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the hot blade for melting of the present invention, Fig. 2 is a perspective view showing part A of the hot blade for melting of the present invention, and Fig. 3 is a perspective view of the hot blade for melting of the present invention.
The figure is a front view in the direction of B-B in the previous figure, Figure 4 is a cross-sectional view showing the state when the plate material for the welding box is melted using the hot melting blade of the present invention, and Figure 5 a is the edge removed. Fig. 6 is a plan view showing the plate material immediately after, Figure b is a front view, and Figure 6 shows the plate material for the welded box after the grooves were melted and formed using the hot melting blade of the present invention and the side ends of the side pieces were melted. FIG. 7 is a schematic diagram showing the manufacturing process of a fusing box using the hot melting blade of the present invention, FIG. 8 is a perspective view showing a conventional hot melting blade, and FIG. 9 is a front view showing a part of the thermal blade of FIG. 8. FIG. 11, 12, 13, 14...Asymmetrical V-shaped heat blade, 11a, 12a, 13a, 14a...Bending groove forming heat blade part, 11', 12', 13', 14'...
Extended corner heat blade section, 15, 16, 17, 18...
Corner heat blade, 21, 22, 23, 24...Auxiliary blade, S...Plate material, S5...Bottom plate, S1, S2, S
3, S4...Side piece, C1a to C4a, C1b to C
4b...Side end.

Claims (1)

[Claims] 1 A thermal blade part for forming a bending groove for bending and standing up a plurality of side pieces provided on the outer periphery of the bottom plate for forming a fusion box, and a fusion groove extending from this thermal blade part. A corner heat blade part that melts only one side of the adjacent side ends of the side pieces of the box board material is provided as a long linear heat blade in a left-right asymmetrical V-shape, and the side pieces of the box board material are fused. It has a short linear corner hot blade that melts the other side of the adjacent side ends, and furthermore, an auxiliary blade is adjacent to the side where the angle of the corner hot blade part is smaller among the left-right asymmetrical V-shaped hot blades. A hot blade for melting used for manufacturing a fusing box, characterized in that the blade is provided with a fusing box.