Hot plate welding device and hot plate welding method

Abstract

To provide a hot plate welding device and a hot plate welding method capable of cutting off the emission of radiant heat during heating and reducing power consumption required for thermal welding.SOLUTION: A hot plate welding device includes: a hot plate that heats an object to be heated; and a reflector that is installed so as to cover the hot plate except for a portion that heats the object to be heated, and that reflects radiant heat toward the hot plate. In a hot plate welding method in which the object to be heated is heated and welded by the hot plate, the method is designed to block radiant heat emitted from the hot plate other than the portion that heats the object to be heated, thereby blocking the radiant heat from the hot plate and reducing power consumption required for hot plate welding.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a hot plate welding apparatus and a hot plate welding method, and more particularly to an apparatus and method that are devised to block radiant heat from a hot plate and reduce the power consumption required for hot plate welding.

Background Art

[0002] As an example of disclosing the configuration of a conventional hot plate welding apparatus, there is, for example, Patent Document 1. The manufacturing method and manufacturing apparatus of the thermoplastic resin composite member described in this Patent Document 1 generally have the following configuration. First, there are thermoplastic resin composites WD and WE, and a hot plate 4A is disposed between these thermoplastic resin composites WD and thermoplastic resin composite WE. The thermoplastic resin composite WD and the thermoplastic resin composite WE are heated by the hot plate 4A, and then the hot plate 4A is retracted to bring the thermoplastic resin composite WD and the thermoplastic resin composite WE into close contact and welded.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] According to the above conventional configuration, there are the following problems. That is, a large amount of heat that does not contribute to heating is released to the outside as radiant heat, and as a result, there is a problem that the power consumption required for heat welding increases.

[0005] The present invention has been made based on such a point, and an object thereof is to provide a hot plate welding apparatus and a hot plate welding method capable of blocking the release of radiant heat during heating and reducing the power consumption required for heat welding.

Means for Solving the Problems

[0006] To achieve the above object, the hot plate welding apparatus according to claim 1 of the present invention comprises a hot plate for heating an object to be heated, and a reflector installed so as to cover a portion other than the portion for heating the object to be heated on the hot plate and reflecting radiant heat toward the hot plate side. Further, the hot plate welding apparatus according to claim 2 is characterized in that, in the hot plate welding apparatus according to claim 1, the reflector has a glossy surface and the glossy surface is installed facing the hot plate side. Further, the hot plate welding apparatus according to claim 3 is characterized in that, in the hot plate welding apparatus according to claim 1, the surface of the reflector on the hot plate side is mirror-finished. Further, the hot plate welding apparatus according to claim 4 is characterized in that, in the hot plate welding apparatus according to claim 1, a gap is provided between the reflector and the hot plate. Further, the hot plate welding apparatus according to claim 5 is characterized in that, in the hot plate welding apparatus according to claim 1, a heat insulating material is provided outside the reflector. Further, the hot plate welding method according to claim 6 is a hot plate welding method in which an object to be heated is heated by a hot plate and welded, and is characterized in that radiant heat emitted from a portion other than the portion for heating the object to be heated on the hot plate is blocked.

Advantages of the Invention

[0007] As described above, according to the hot plate welding apparatus according to claim 1 of the present invention, it has a configuration including a hot plate for heating an object to be heated and a reflector installed so as to cover a portion other than the portion for heating the object to be heated on the hot plate and reflecting radiant heat toward the hot plate side. Therefore, radiant heat from the hot plate can be blocked, and the power consumption required for hot plate welding can be reduced. Further, according to the hot plate welding apparatus according to claim 2, in the hot plate welding apparatus according to claim 1, the reflector has a glossy surface and the glossy surface is installed facing the hot plate side, so that the above effect can be further enhanced. Moreover, according to the hot plate welding apparatus according to claim 3, in the hot plate welding apparatus according to claim 1, since the surface of the reflector on the hot plate side is mirror-finished, the above effect can be further enhanced. Moreover, according to the hot plate welding apparatus according to claim 4, in the hot plate welding apparatus according to claim 1, since a gap is provided between the reflector and the hot plate, a heat insulation effect can also be exerted. Moreover, according to the hot plate welding apparatus according to claim 5, in the hot plate welding apparatus according to claim 1, since a heat insulating material is provided outside the reflector, a heat insulation effect can also be exerted. Moreover, according to the hot plate welding method according to claim 6, in the hot plate welding method of heating and welding an object to be heated with a hot plate, the radiant heat emitted from a part other than the part of the hot plate that heats the object to be heated is blocked, and the radiant heat from the hot plate can be blocked to reduce the power consumption required for hot plate welding.

Brief Description of the Drawings

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Embodiments for Carrying Out the Invention

[0009] Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 12. First, with reference to FIGS. 1 to 4, the configuration of the hot plate 1 according to this embodiment will be described. The hot plate 1 includes a hot mold 3, and an upper mold heater block 5 and a lower mold heater block 7 are installed above and below the hot mold 3. A cartridge heater 9 is installed inside the upper mold heater block 5, and a cartridge heater 11 is also installed inside the lower mold heater block 7.

[0010] A product set portion 13 is provided on the upper surface of the upper mold heater block 5. A product set portion 15 is also provided on the lower surface of the lower mold heater block 7.

[0011] The upper mold heater block 5 is covered with an upper mold cover 21, and the lower mold heater block 7 is covered with a lower mold cover 23. The upper mold cover 21 is composed of two parts, an outer cover 21a provided on the outer peripheral side of the product set portion 13 and an inner cover 21b provided inside the product set portion 13, and is separately attached to the upper mold heater block 5. An opening 25 is provided at the portion of the outer cover 23a where the cartridge heater 9 is provided. It is also conceivable to make the opening 25 as small as possible to the extent of a gap and insert and remove the heater wire through the gap. Similarly, the lower mold cover 23 is composed of two parts, an outer cover 23a provided on the outer peripheral side of the product set portion 15 and an inner cover 23b provided inside the product set portion 13, and is separately attached to the lower mold heater block 7. An opening 27 is provided at the portion of the outer cover 23a where the cartridge heater 11 is provided. It is also conceivable to make the opening 27 as small as possible to the extent of a gap and insert and remove the heater wire through the gap. The upper mold cover 21 covers the heating portion of the upper mold heater block 5, that is, the portion other than the product set portion 13, and blocks the radiant heat radiated therefrom. Similarly, the lower mold cover 23 covers the heating portion of the lower mold heater block 7, that is, the portion other than the product set portion 15, and blocks the radiant heat radiated therefrom.

[0012] The upper mold cover 21 and the lower mold cover 23 are made of, for example, stainless steel.

[0013] As shown in FIG. 5, the hot plate welding apparatus according to the present embodiment is composed of the hot plate 1, the upper mold 31, the lower mold 33, a drive mechanism (not shown), and the like. An upper mold receiving block 35 is attached to the upper mold 31, and a lower mold receiving block 37 is attached to the lower mold 33. The upper half product 17 is set on the upper mold receiving block 35, and the lower half product 19 is set on the lower mold receiving block 37.

[0014] Also, as shown in FIG. 5, a gap 41 is provided between the upper mold cover 21 and the upper mold heater block 5. Similarly, a gap 43 is also provided between the lower mold cover 23 and the lower mold heater block 7. These gaps 41 and 43 function as heat insulators.

[0015] Based on the above configuration, the process of hot plate welding will be sequentially described with reference to FIGS. 5 to 12. First, as shown in FIG. 5, the upper semi-finished product 17 is set on the upper mold receiving block 35, and the lower semi-finished product 19 is set on the lower mold receiving block 37. Also, in this state, the hot plate 1 is in a retracted state from between the upper mold 31 and the lower mold 33.

[0016] Next, as shown in FIG. 6, the hot plate 1 is made to appear at a predetermined position between the upper mold 31 and the lower mold 33.

[0017] Next, as shown in FIG. 7, the upper mold 31 and the lower mold 33 are brought closer to each other, causing the upper mold receiving block 35 on which the upper semi-finished product 17 is set to contact the upper mold heater block 5, and the lower mold receiving block 37 on which the lower semi-finished product 19 is set to contact the lower mold heater block 7. As a result, the welded portion of the upper semi-finished product 17 is heated through the product setting portion 13, and the welded portion of the lower semi-finished product 19 is heated through the product setting portion 15.

[0018] Next, as shown in FIG. 8, after a predetermined heating time has elapsed, the upper mold 31 and the lower mold 33 are separated.

[0019] Next, as shown in FIG. 9, the hot plate 1 is retracted from between the upper mold 31 and the lower mold 33.

[0020] Next, as shown in FIG. 10, the upper mold 31 and the lower mold 33 are brought closer to each other to bring the welded portions of the upper semi-finished product 17 and the lower semi-finished product 19 into contact. Thereby, the upper semi-finished product 17 and the lower semi-finished product 19 are welded and fixed.

[0021] Next, as shown in FIG. 11, the upper mold 31 and the lower mold 33 are separated from each other. As a result, the upper semi-finished product 17 and the lower semi-finished product 19 are left as the product 51 in a state of being welded and fixed to the lower mold receiving block 37 side of the lower mold 33.

[0022] Next, as shown in FIG. 12, the product 51 in which the upper semi-finished product 17 and the lower semi-finished product 19 welded and fixed to the lower mold receiving block 37 side of the lower mold 33 is taken out.

[0023] According to the above-described embodiment, the following effects can be obtained. First, the radiant heat from the hot plate 1 can be blocked by the upper mold cover 21 and the lower mold cover 23, and the heat can be contributed to the heating of the welded parts of the upper semi-finished product 17 and the lower semi-finished product 19, thereby reducing the power consumption required for hot plate welding. Also, a gap 41 is provided between the upper mold cover 21 and the upper mold heater block 5, and a gap 43 is also provided between the lower mold cover 23 and the lower mold heater block 7. Therefore, the heat insulation function can be exerted by these gaps 41 and 43.

[0024] Next, a second embodiment of the present invention will be described. In the case of this second embodiment, a heat insulating material (not shown) is provided on the outer surfaces of the upper mold cover 21 and the lower mold cover 23 in the first embodiment. As the heat insulating material, for example, a material obtained by vapor-depositing aluminum on a glass wool material can be considered. Other configurations are the same as those in the first embodiment, and the description thereof will be omitted.

[0025] According to the above configuration, the same effects as those in the first embodiment can be obtained, and the heat insulation function can be exerted, and the temperature rise in the hot plate welding apparatus can be prevented.

[0026] Next, a third embodiment of the present invention will be described. In the case of this third embodiment, in the gaps 41 and 43 in the first embodiment, the structure is configured to suppress the inflow of air from the lower surface side. Other configurations are the same as those in the first embodiment, and the description thereof will be omitted.

[0027] According to the above configuration, the same effects as those in the first embodiment can be achieved, and the air flow in the gaps 41 and 43 can be stopped to enhance the heat retention effect.

[0028] Next, a fourth embodiment of the present invention will be described. In the case of this fourth embodiment, the inner surfaces of the upper mold cover 21 and the lower mold cover 23 in the first embodiment are mirror-finished. Other configurations are the same as those in the first embodiment, and the description thereof will be omitted.

[0029] According to the above configuration, the same effects as those in the first embodiment can be achieved, and by mirror-finishing the inner surfaces of the upper mold cover 21 and the lower mold cover 23, radiant heat can be effectively reflected and blocked.

[0030] Next, a fifth embodiment of the present invention will be described. In the case of the first embodiment, the gloss of the inner and outer surfaces of the upper mold cover 21 and the lower mold cover 23 was not mentioned. However, if there is a difference in gloss, the surface with more gloss is made the inner surface.

[0031] According to the above configuration, the same effects as those in the first embodiment can be achieved, and since the inner surfaces of the upper mold cover 21 and the lower mold cover 23 are glossy surfaces, radiant heat can be effectively reflected and blocked.

[0032] Note that the present invention is not limited to the first to fifth embodiments. In addition, in the case of the first to fifth embodiments, the upper mold cover and the lower mold cover are made of stainless steel, but the present invention is not limited thereto, and various materials can be considered. For example, those obtained by applying chromium plating or nickel plating to the surface of an iron plate can be considered. In addition, the illustrated configuration is merely an example.

Industrial Applicability

[0033] The present invention relates to a hot plate welding apparatus and a hot plate welding method, and more particularly to an apparatus and a method that are devised to block radiant heat from a hot plate and reduce the power consumption required for hot plate welding. For example, the present invention is suitable for a hot plate welding apparatus and a hot plate welding method for installing an outer casing of an automotive lamp.

Explanation of Reference Numerals

[0034] 1 Hot plate 3 Hot mold 5 Upper mold heater block 7 Lower mold heater block 9 Cartridge heater 11 Cartridge heater 21 Upper mold cover 21a Outer cover 21b Inner cover 23 Lower mold cover 23a Outer cover 23b Inner cover 41 Gap 43 Gap

Claims

1. A hot plate for heating an object to be heated, and a reflector installed so as to cover a portion other than the portion for heating the object to be heated on the hot plate and reflecting radiant heat toward the hot plate side, characterized by comprising a hot plate welding apparatus.

2. In the hot plate welding apparatus according to Claim 1, the reflector has a glossy surface and is installed with the glossy surface facing the hot plate side, characterized by a hot plate welding apparatus.

3. In the hot plate welding apparatus according to Claim 1, the surface of the reflector on the hot plate side is mirror-finished, characterized by a hot plate welding apparatus.

4. In the hot plate welding apparatus according to Claim 1, a gap is provided between the reflector and the hot plate, characterized by a hot plate welding apparatus.

5. In the hot plate welding apparatus according to Claim 1, a heat insulating material is provided outside the reflector, characterized by a hot plate welding apparatus.

6. In a hot plate welding method of heating and welding an object to be heated with a hot plate, radiant heat emitted from a portion other than the portion for heating the object to be heated on the hot plate is blocked, characterized by a hot plate welding method.

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