JP4343501B2 - Bending method of thermoplastic synthetic resin plate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for bending a thermoplastic synthetic resin plate, and in particular, heats the vicinity of a portion that becomes a ridgeline of the thermoplastic synthetic resin plate, and then bends the thermoplastic synthetic resin plate along the portion that becomes the ridgeline. The present invention relates to a method for bending a thermoplastic synthetic resin plate.
[0002]
[Prior art]
Conventionally, a thermoplastic synthetic resin plate is placed on a pair of heat shielding plates (for example, heat-resistant rubber) disposed with a gap so that a portion that becomes a ridge line is disposed on the gap, A method of bending a thermoplastic synthetic resin plate is considered in which the thermoplastic synthetic resin plate is heated by a heater or the like from below the gap, and then the thermoplastic synthetic resin plate is bent along a portion that becomes the ridgeline. .
[0003]
An example will be described with reference to FIGS. As shown in FIG. 5, a thermoplastic synthetic resin plate (hereinafter simply referred to as a synthetic resin plate) 1 in which a groove 1a is formed in advance along a portion that becomes a ridgeline is formed by a pair of heats provided with a gap 3a therebetween. On the shielding plates 3 and 3, the groove 1a is placed so as to be disposed on the gap 3a. As shown in FIG. 6 as a cross-sectional view along the groove 1a and FIG. 7 as a right side view, a heater 5 is disposed below the gap 3a, and further below that is a concave surface on the heater 5 side. A reflecting plate 7 facing is arranged.
[0004]
As shown in FIG. 7, the heat shielding plate 3 has a structure in which an iron plate 33 is laminated on a heat insulating material 31 such as heat-resistant rubber, rock wool, or cork. For this reason, when the heater 5 is heated, the synthetic resin plate 1 in the vicinity of the groove 1a is heated through the gap 3a, and only in the vicinity of the groove 1a. Furthermore, since the vicinity of the groove 1a is thin, the temperature rise when heated is faster than other portions of the synthetic resin plate 1. Therefore, the synthetic resin plate 1 can be bent relatively well along the groove 1a.
[0005]
[Problems to be solved by the invention]
However, the air heated by the heater 5 rises through the gap 3a as indicated by an arrow in FIG. 6, and is shielded from both end faces 1b and 1b in the direction along the portion that becomes the ridgeline of the synthetic resin plate 1. Ascend on the plate 3. For this reason, the vicinity of the portion that becomes the ridgeline of the synthetic resin plate 1 is heated faster in the vicinity of both end faces 1b and 1b than in the vicinity of the center. Therefore, before the vicinity of the center of the synthetic resin plate 1 reaches a temperature suitable for bending, the vicinity of both end faces 1b and 1b of the synthetic resin plate 1 may start to melt.
[0006]
Accordingly, the present invention provides a method for bending a thermoplastic synthetic resin plate in which the vicinity of a portion that becomes a ridgeline of a thermoplastic synthetic resin plate is heated, and then the thermoplastic synthetic resin plate is bent along the portion that becomes the ridgeline. It was made for the purpose of preventing the deformation due to melting of both ends by uniformly heating the vicinity of the portion to be the ridgeline.
[0007]
[Means for Solving the Problems and Effects of the Invention]
In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that a thermoplastic synthesizer is formed so that a portion to be a ridge line is disposed on the gap between a pair of heat shielding plates arranged with a gap. A method of bending a thermoplastic synthetic resin plate, placing a resin plate, heating the thermoplastic synthetic resin plate from below the gap, and then bending the thermoplastic synthetic resin plate along a portion that becomes the ridgeline. In the heating, the air heated by the heating is blocked on the pair of heat shielding plates so as to come into contact with both end faces in the direction along the ridge line portion of the thermoplastic synthetic resin plate. By placing a pair of plate members, the air heated by the heating is raised on the heat shield plate, bypassing the pair of plate members .
[0008]
In the present invention configured as described above, in heating the vicinity of the portion that becomes the ridgeline of the thermoplastic synthetic resin plate from the gap between the pair of heat shielding plates, the direction along the portion that becomes the ridgeline of the thermoplastic synthetic resin plate A pair of plate members that block the air heated by the heating are placed on the pair of heat shielding plates so as to be in contact with both end faces. For this reason, the air heated by the said heating does not pass through the said end surface of a thermoplastic synthetic resin board, bypasses the said board | plate material, and raises on the said heat shielding board. Therefore, according to the present invention, both the center and both ends of the ridgeline portion of the thermoplastic synthetic resin plate can be heated almost uniformly, and thus, the above-described deformation due to melting of both ends can be prevented well. can do.
[0009]
The heat shielding plate may be any material as long as it shields radiant heat due to heating from below the gap, and other materials such as heat resistant rubber, rock wool, cork, ceramics, ceramics, heat resistant synthetic resin, etc. Can be used. The plate material only needs to block the air heated by the heating, and in addition to the same material as the heat shield plate, various materials having higher heat resistance than the thermoplastic synthetic resin plate to be bent are used. can do.
[0010]
The invention according to claim 2 uses the gauge having two planes intersecting at a desired bending angle in addition to the configuration according to claim 1, and a portion that becomes a ridge line of the thermoplastic synthetic resin plate after the heating is the two planes. The thermoplastic synthetic resin plate is bent by being pressed against the intersection line.
[0011]
In the present invention, the thermoplastic synthetic resin plate after heating is bent by pressing against two planes of the gauge that intersect at a desired bending angle. Therefore, the thermoplastic synthetic resin plate can be accurately bent at the desired bending angle. Therefore, in the present invention, in addition to the effect of the invention described in claim 1, the effect that the accuracy of the bending angle of the thermoplastic synthetic resin plate can be further improved can be achieved. In addition, as said gauge, the gauge comprised by two plates orthogonally crossed is mentioned, for example.
[0012]
The invention described in claim 3 is characterized in that, in addition to the structure described in claim 1 or 2, a groove is formed in advance in the thermoplastic synthetic resin plate along the portion that becomes the ridgeline.
In the present invention, since the groove is formed in advance along the portion that becomes the ridgeline in the thermoplastic synthetic resin plate, it becomes easier to bend the thermoplastic synthetic resin plate along the portion that becomes the ridgeline. Therefore, in the present invention, in addition to the invention described in claim 1 or 2, an effect that the bending of the thermoplastic synthetic resin plate can be further facilitated is produced.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. 1 and 2 showing an embodiment of the present invention are substantially the same as FIGS. 6 and 7 described as the prior art, and therefore, parts similar to those shown in FIGS. , The same reference numerals are used in FIG. Also in the present embodiment, the synthetic resin plate 1 in which the groove 1a is formed in advance along the portion that becomes the ridgeline is formed on the pair of heat shielding plates 3 and 3 that are disposed with the gap 3a opened. It mounts so that it may be arrange | positioned on the clearance gap 3a.
[0014]
Further, in the present embodiment, a pair of plate materials 9 and 9 (for example, wood, ceramics, ceramics, etc. are insulated so as to contact both end faces 1b and 1b in the direction along the ridgeline of the synthetic resin plate 1. A plate having excellent properties) was placed. A heater 5 is disposed below the gap 3a, and a reflector 7 having a concave surface facing the heater 5 is disposed below the heater 5. The side of the lower surface of the heat shielding plates 3 and 3 on the gap 3a side is chamfered so that the air heated by the heater 5 can easily enter the gap 3a.
[0015]
Thus, in this Embodiment, a pair of board | plate materials 9 and 9 are mounted so that the both end surfaces 1b and 1b of the synthetic resin board 1 may be contact | connected. Therefore, the air heated by the heater 5 ascends through the gap 3a as shown by the arrow in FIG. . For this reason, in the present embodiment, both the center and both ends of the portion that becomes the ridge line of the synthetic resin plate 1 can be heated substantially uniformly, and as a result, the melting in the vicinity of both end faces 1b and 1b as described above can be achieved. Defects such as deformation due to can be prevented well.
[0016]
The synthetic resin plate 1 in which the vicinity of the portion that becomes the ridge line is heated to an appropriate temperature in this way is bent at a right angle by using the gauge 20 shown in FIG. As shown in FIG. 3, the gauge 20 has two planes 21 and 22 that are orthogonal to each other. The gauge 20 can be made of various materials such as synthetic resin and aluminum having a certain degree of heat resistance.
[0017]
In this bending operation, the portion to be the ridge line of the synthetic resin plate 1 is pressed against the intersection line 23 of the two planes 21 and 22 so that the groove 1a is on the inner side. As a result, the two surfaces of the synthetic resin plate 1 sandwiching the portion that becomes the ridge line are pressed against the two planes 21 and 22, and the synthetic resin plate 1 can be bent at a right angle very accurately. Also, this bending operation is very easy because the groove 1a is formed in the synthetic resin plate 1 in advance. Thus, if it cools naturally, pressing the synthetic resin board 1 against the gauge 20, the bending process by this Embodiment will be completed. If the angle formed by the two planes 21 and 22 of the gauge 20 is changed, the synthetic resin plate 1 can be bent to another angle.
[0018]
In addition, this invention is not limited to the said embodiment at all, It can implement with a various form in the range which does not deviate from the summary of this invention. For example, as the heat shielding plate, the iron plate 33 may be omitted, and various materials such as ceramics, ceramics, wood, and heat-resistant synthetic resin can be used in addition to heat-resistant rubber, rock wool, cork and the like. Moreover, as a board | plate material, the various materials which have heat resistance higher than the synthetic resin board 1 other than the material similar to the said heat shielding board can be used.
[0019]
Furthermore, the heating method may be a means other than the heater 5, and various methods can be adopted as a method of bending the synthetic resin plate 1 after the heating. For example, the heat shielding plates 3 and 3 may be bent by hand, or may be performed by connecting the heat shielding plates 3 and 3 with hinges and bending the heat shielding plates 3 and 3. In the latter case, bending can be performed while the synthetic resin plate 1 is placed on the heat shielding plates 3 and 3.
[0020]
Furthermore, the groove 1a is not necessarily provided, and conversely, a plurality of grooves 1a may be provided. When a plurality of grooves 1a are provided, as shown in FIGS. 4 (A) and 4 (B), the amount of bending of the synthetic resin plate 1 related to each groove 1a is reduced, making the bending work easier and clearer ridge lines. You can put it out.
[0021]
As shown in FIGS. 3 and 4B, when the bending work is performed by providing the groove 1a, the inner angle can be made a right angle (so-called pin angle). In this case, the parts to be installed can be arranged along the pin angle. Therefore, when a case is created by such bending, the internal space can be used effectively.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a method of bending a thermoplastic synthetic resin plate as an embodiment of the invention, with a cross section taken along a portion serving as a ridgeline.
FIG. 2 is a right side view showing a method of bending the thermoplastic synthetic resin plate.
FIG. 3 is a side view showing a bending method of the thermoplastic synthetic resin plate and a configuration of a gauge used in the method.
FIG. 4 is a side view showing a modification of the thermoplastic synthetic resin plate bending method together with a gauge.
FIG. 5 is a perspective view illustrating a method of bending a thermoplastic synthetic resin plate according to an embodiment and a conventional example.
FIG. 6 is a cross-sectional view showing a conventional method of bending a thermoplastic synthetic resin plate in a cross section along a portion that becomes a ridgeline.
FIG. 7 is a right side view showing a method of bending the thermoplastic synthetic resin plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Thermoplastic synthetic resin board 1a ... Groove 1b ... End surface 3 ... Heat shielding board 3a ... Gap 5 ... Heater 7 ... Reflecting plate 9 ... Plate material 20 ... Gauge

Claims (3)

A thermoplastic synthetic resin plate is placed on a pair of heat shielding plates arranged with a gap so that a portion that becomes a ridge line is arranged on the gap,
The thermoplastic synthetic resin plate is heated from below the gap,
Subsequently, a thermoplastic synthetic resin plate bending method for bending the thermoplastic synthetic resin plate along the portion that becomes the ridgeline,
On the heating, a pair of plate materials that block the air heated by the heating on the pair of heat shielding plates so as to come into contact with both end faces in the direction along the ridge line portion of the thermoplastic synthetic resin plate. A method of bending a thermoplastic synthetic resin plate, characterized in that the air heated by the heating is placed on the heat shielding plate so as to bypass the pair of plate materials . Using a gauge with two planes intersecting at the desired bending angle,
2. The thermoplastic synthetic resin plate according to claim 1, wherein the thermoplastic synthetic resin plate is bent by pressing a portion that becomes a ridge line of the heated thermoplastic synthetic resin plate against an intersection line of the two planes. Bending method.   The method for bending a thermoplastic synthetic resin plate according to claim 1 or 2, wherein a groove is formed in advance in the thermoplastic synthetic resin plate along a portion that becomes the ridgeline.

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