Reflector plate and set of reflector plates

Abstract

To provide a reflector plate in which a reflection mode of infrared rays is adjusted so that an irradiation mode for an object to be heated with infrared rays can be adjusted, and a set of reflector plates.SOLUTION: A reflector plate 1 has a thin film 12 as an infrared-ray reflection part reflecting infrared rays. The thin film 12 has respective first hole parts 20 and respective second hole parts 22 formed as an infrared-ray transmission part transmitting infrared rays. The reflector plate 1 has a base plate 10 transmitting infrared rays. The thin film 12 is formed on a first surface of the base plate 10 and a second surface opposed to the first surface. The respective first hole parts 20 and the respective second hole parts 22 related to the thin film 12 on the first surface have the same arrangement with the respective first hole parts 20 and the respective second hole parts 22 related to the thin film 12 on the second surface.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a reflector capable of reflecting infrared rays and the like, and a set of reflectors.

Background Art

[0002] As a protective window that reflects infrared radiation, the one described in Japanese Patent No. 7094114 (Patent Document 1) is known. This protective window is a transparent window for an oven chamber, and a coating that reflects infrared radiation is applied to the surface of the plate.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above protective window, infrared rays for heating are reflected while making it possible to visually recognize the inside of the oven. However, in the above protective window, since infrared rays are reflected by a plate with a transparent coating, there is room for improvement in increasing the amount of infrared ray reflection in a state where a sufficient service life is obtained. In particular, when a large amount of infrared ray reflection is required, such as when preheating a mold, there is a possibility of insufficiency in infrared ray reflection by a plate with a transparent coating. Furthermore, in infrared ray reflection by a plate with a transparent coating, the mode of reflection is constant and not adjustable.

[0005] Therefore, the first main object of the present invention is to provide a reflector and a set of reflectors in which the mode of infrared ray reflection is adjusted and the irradiation mode of infrared rays to a heating target can be adjusted. Furthermore, the second main object of the present invention is to provide a reflector and a set of reflectors in which the irradiation mode of infrared rays on the object to be heated can be adjusted. Moreover, the third main object of the present invention is to provide a reflector and a set of reflectors in which the infrared ray reflection amount is improved while obtaining a sufficient service life.

Means for Solving the Problems

[0006] This specification discloses a reflector. This reflector may have an infrared ray reflecting portion that reflects infrared rays. An infrared ray transmitting portion that transmits infrared rays may be formed in the infrared ray reflecting portion. Moreover, this specification discloses a set of reflectors. This set of reflectors may include a first reflector that has a first infrared ray reflecting portion that reflects infrared rays, and a first infrared ray transmitting portion that transmits infrared rays is formed in the first infrared ray reflecting portion. This set of reflectors may include a second reflector that has a second infrared ray reflecting portion that reflects infrared rays, and a second infrared ray transmitting portion that transmits infrared rays is formed in the second infrared ray reflecting portion. The arrangement of the first infrared ray transmitting portion may be different from the arrangement of the second infrared ray transmitting portion. Moreover, this specification discloses a set of reflectors. This set of reflectors may include a plurality of reflectors each having an infrared ray reflecting portion that reflects infrared rays. The plurality of reflectors may be arranged so as to surround a part of the periphery of the infrared ray radiation source.

Effects of the Invention

[0007] The first main effect of the present invention is that a reflector and a set of reflectors are provided in which the reflection mode of infrared rays is adjusted and the irradiation mode of infrared rays on the object to be heated can be adjusted. Furthermore, the second main effect of the present invention is that a reflector and a set of reflectors are provided in which the irradiation mode of infrared rays on the object to be heated can be adjusted. Moreover, the third main effect of the present invention is that a reflector and a set of reflectors are provided in which the infrared ray reflection amount is improved while obtaining a sufficient service life.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments according to the present invention, together with modification examples thereof, will be described as appropriate with reference to the drawings. Note that the embodiments are not limited to the following embodiments and modification examples.

[0010] FIG. 1 is a schematic perspective view of a reflector 1 according to the first embodiment of the present invention and its surroundings. The reflector 1 is a plate that reflects infrared rays. The reflector 1 is used here together with a mold heating device M. Note that the reflector 1 may be used together with other devices that emit infrared rays or the like.

[0011] The mold heating device M is a device that heats at least one of the upper mold U and the lower mold D. Note that the size of the upper mold U may be different from the size of the lower mold D, or may be approximately the same as the size of the lower mold D. The mold heating device M includes a case A, a heater connection part J, a lead wire part L, and a plurality (three) of heaters H.

[0012] The case A is a metal box body that is open at the top and bottom. The heater connection part J is held inside the rear part of the case A. The heater connection part J has three sets of terminal parts corresponding to the three heaters H. Incidentally, one terminal part may be connected to a plurality of heaters H. The lead wire part L includes a plurality of lead wires and is connected to each terminal part of the heater connection part J.

[0013] The plurality of heaters H are arranged in one direction while extending in the front-rear direction respectively. Each heater H faces the front-rear direction. Incidentally, the longitudinal direction of the heater H is the vertical direction of the mold heating device M, the direction intersecting the vertical direction and the front-rear direction and in which the heaters H are arranged is the left-right direction of the mold heating device M. Such a direction of the mold heating device M is defined for convenience of explanation and may change depending on the movement and installation modes of various members and parts.

[0014] Each heater H is a lamp heater and has a tube T and a carbonaceous heating element C. Since each heater H is formed in the same manner as each other, hereinafter, unless otherwise specified, one heater H will be described. Incidentally, some heaters H may be different from other heaters H. In the mold heating device M, three or more types of heaters H may be used. In some or all of the heaters H, a plurality of carbonaceous heating elements C may be placed in one tube T.

[0015] The tube T is made of quartz glass and has translucency. The tube T extends in the front-rear direction and is cylindrical with both front and rear ends sealed. Incidentally, as long as at least the material of any one tube T has heat resistance while allowing infrared rays to pass through, it may be other than quartz glass. Also, the shape of at least any one tube T may be other than cylindrical, such as a rectangular tube shape. An inert gas such as argon gas is enclosed inside the tube T, suppressing deterioration due to oxidation of the carbonaceous heating element C. Incidentally, the enclosure of the inert gas may be omitted. Each tube T is arranged side by side in the left-right direction. Each tube T is adjacent to each other.

[0016] The carbonaceous heating element C is a plate-shaped member that extends in the front-rear direction and spreads in the front-rear, left-right directions. The carbonaceous heating element C is a carbonaceous plate. The posture of the carbonaceous heating element C is horizontal. Note that at least one of the postures of each carbonaceous heating element C may be other than horizontal. Also, at least one of the shapes of each carbonaceous heating element C may be other than plate-shaped. The carbonaceous heating element C has slits of the same length alternately and at equal intervals from both left and right sides over the entire body except for the ends (not shown in the figure). Therefore, each carbonaceous heating element C has a meandering shape. Note that the length of some of the slits may be longer or shorter than the length of other slits. Also, the size between some of the slits may be larger or smaller than the size between other slits. Furthermore, the carbonaceous heating element C may not have slits. When energized, the carbonaceous heating element C generates heat and emits infrared rays. Due to the arrangement pattern of the slits in each carbonaceous heating element C, the resistance of each carbonaceous heating element C is adjusted, the amount of infrared ray emission is adjusted, and the amount of heat generation is adjusted. For example, when the size between the slits above and below the central part of each carbonaceous heating element C is made larger than the size between the slits in the central part of each carbonaceous heating element C, the resistance in the central part of each carbonaceous heating element C becomes smaller compared to above and below it, the amount of infrared ray emission in the central part of each carbonaceous heating element C becomes larger compared to above and below it, the amount of heat generation in the central part of each carbonaceous heating element C becomes larger compared to above and below it, and the amount of infrared ray emission in the central part of each carbonaceous heating element C becomes larger compared to above and below it. The carbonaceous heating element C is lighter than a metal of the same size. Therefore, the heater H is lighter than a heater using a metal heating element of the same size. Also, since the carbonaceous heating element C emits infrared rays and heats at least one of the upper mold U and the lower mold D as the heating target by the infrared rays, the heater H can efficiently heat even a distant heating target and can heat a high-temperature heating target while suppressing a reduction in the heat transfer amount. Furthermore, since the carbonaceous heating element C instantaneously emits light (glows red) in response to the application of electric power, the heating target starts to be heated immediately, and it is easy for the user to grasp the operating state of the heater H.

[0017] The carbonaceous heating element C is held inside the tube T. The amount of infrared radiation from the upper and lower surfaces, which are the surfaces of the carbonaceous heating element C, is greater than the amount of infrared radiation from the front, rear, left, and right surfaces, which are the thickness surfaces of the carbonaceous heating element C. That is, the infrared radiation from the carbonaceous heating element C is mainly emitted from the upper and lower surfaces, and there is directivity in the heat radiation of the carbonaceous heating element C. Incidentally, one or more internal reflecting plates for reflecting infrared rays may be provided inside the tube T. The internal reflecting plates may all be in contact with the inner wall of each tube T, or a part or all of them may be separated from the inner wall.

[0018] Each heater H is fitted into the corresponding terminal portion of the heater connection portion J. The carbonaceous heating element C of each heater H emits infrared rays and generates heat by the electric power received from the lead wire portion L connected to the power supply via the terminal portion. In the mold heating device M, a plurality of heaters H are mounted adjacent to each other, so that the upper and lower surfaces of the carbonaceous heating element C in each tube T are arranged in the left - right direction. Thus, a virtual plate - shaped heat - generating surface portion that spreads in the front - rear, left - right directions is formed. Infrared rays are mainly emitted upward and downward from the heat - generating surface portion. Incidentally, the mold heating device M may be provided with a switch for turning the power on and off.

[0019] The reflecting plate 1 is disposed between the upper mold U and the mold heating device M. The size of the front - rear, left - right spread of the reflecting plate 1 is the same as the size of the front - rear, left - right spread of the heat - generating surface portion of the mold heating device M. The reflecting plate 1 reflects a part of the infrared rays that have emerged upward from the mold heating device M downward and transmits the remaining part. Strictly speaking, there may be infrared rays that scatter in directions other than downward and infrared rays that are absorbed by the reflecting plate 1, but even if any of them exist, they are negligible, and these infrared rays are ignored here. The reflected infrared rays travel downward together with the infrared rays that have emerged upward from the mold heating device M and heat the lower mold D if there is a lower mold D. The transmitted infrared rays heat the upper mold U if there is an upper mold U. Furthermore, the reflector 1 may be disposed between the lower mold D and the mold heating device M. The size of the reflector 1 may be other than the above-described size. The reflector 1 may reflect all of the incident infrared rays.

[0020] FIG. 2 is a top view of the reflector 1. FIG. 3 is a left side view of the reflector 1. The reflector 1 includes a reflector body 2, a first leg portion 4, and a second leg portion 6.

[0021] The reflector body 2 includes a base plate 10 and a plurality (here, two) of thin films 12.

[0022] The base plate 10 is plate-shaped and exhibits heat resistance to withstand high heat (for example, 800°C). The base plate 10 is preferably made of glass, ceramic, or glass-ceramic. The base plate 10 may or may not have visible light transmissibility. The base plate 10 transmits infrared rays. The transmittance of infrared rays in the base plate 10 may be set variously. The base plate 10 is preferably made of glass, ceramic, or glass-ceramic.

[0023] Each thin film 12 as an infrared ray reflecting portion is formed on the first surface (here, the upper surface) and the second surface (here, the lower surface) of the base plate 10. The first surface and the second surface of the base plate 10 face each other. Each thin film 12 is the same as the others except for the surface of the base plate 10 on which it is disposed. Hereinafter, unless otherwise specified, the thin film 12 on the first surface will be described, and the description of the thin film 12 on the second surface will be omitted as appropriate. The thin film 12 preferably contains at least any one of silica (silicon oxide, SiO2), alumina (aluminum oxide, Al2O3), and siloxane. The thin film 12 may or may not have visible light transmissibility. The thin film 12 reflects infrared rays. The reflectance of infrared rays in the thin film 12 may be set variously. The method for forming the thin film 12 is not particularly limited and may be, for example, at least any one of coating, vapor deposition, and sputtering. In addition, at least any one of the configuration, material, formation method, and reflectance of each thin film 12 may be different from each other. Also, the thin film 12 may be provided on only one surface, or a plurality of thin films 12 may be provided on one surface. Further, one or more intermediate films may be formed between a part or all of the thin film 12 and the base plate 10. Alternatively, one or more coating films may be formed on the air side of a part or all of the thin film 12. In addition, the infrared reflection portion is not limited to the thin film 12 and may be, for example, a metal block.

[0024] The thin film 12 is not formed on the entire first surface and the entire second surface of the base plate 10 and has a plurality (here, three) of first hole portions 20 and a plurality (here, twelve) of second hole portions 22. That is, the first hole portions 20 and the second hole portions 22 are formed in the thin film 12. The thin film 12 does not cover the entire first surface of the base plate 10 and the like. Hereinafter, an aspect of the thin film 12 that covers the entire surface and has no hole portion is referred to as a full-surface type. Also, an aspect of the thin film 12 having one or more hole portions is referred to as a perforated type. Each first hole portion 20 as an infrared transmission portion is rectangular. The first hole portions 20 are arranged side by side on the left and right at the center in the front-rear direction of the base plate 10. Each second hole portion 22 as an infrared transmission portion is circular. The second hole portions 22 are divided into six first groups and six second groups. The first group is arranged in a state where two are arranged in the front-rear direction and three are arranged in the left-right direction in front of each first hole portion 20. The second group is arranged in a state where two are arranged in the front-rear direction and three are arranged in the left-right direction behind each first hole portion 20. In each of the first hole portions 20 and the second hole portions 22, the first surface or the second surface of the base plate 10 is exposed. Also, in the upper and lower thin films 12, since the arrangements related to the first hole portions 20 and the second hole portions 22 are the same, when looking from the upper side to the lower side of the reflector 1, the corresponding first hole portions 20 or the second hole portions 22 overlap each other. The thin film 12 of the type with holes is not limited to such three first hole portions 20 and two groups of six second hole portions 22 each. Also, in some or all of the thin films 12, the arrangement of the hole portions may be different from each other. Further, at least one of each of the first hole portions 20 and the second hole portions 22 may be omitted. When all of the first hole portions 20 and all of the second hole portions 22 are omitted, the reflector 1 has the thin film 12 of the full-surface type. In addition, some or all of the infrared transmission portions may be thinning portions that are portions thinner than other portions of the thin film 12 rather than the hole portions of the thin film 12, or may be different-material portions that are portions made of a material different from other portions of the thin film 12.

[0025] The first leg portion 4 has a main body holding portion 30, a folding plate portion 32, and a plurality (here, two) of bolts 34. The main body holding portion 30 holds the front side of the base plate 10. The folding plate portion 32 is in an "L" shape when viewed from the right to the left. The lower surface of the folding plate portion 32 serves as the grounding surface of the first leg portion 4. Each bolt 34 is arranged left and right and couples the folding plate portion 32 to the main body holding portion 30.

[0026] The second leg portion 6 has a main body holding portion 40, a folding plate portion 42, and a plurality (here, two) of bolts 44. The main body holding portion 40 holds the rear side of the base plate 10. The folding plate portion 42 is in an "L" shape when viewed from the left to the right. The lower surface of the folding plate portion 42 serves as the grounding surface of the second leg portion 6. Each bolt 44 is arranged left and right and couples the folding plate portion 42 to the main body holding portion 40. Note that at least one of the first leg portion 4 and the second leg portion 6 may be omitted. Also, at least one of the arrangement, shape, and size of at least one of the first leg portion 4 and the second leg portion 6 may be changed from those described above. Further, one or three or more leg portions including the first leg portion 4 and the second leg portion 6 may be provided.

[0027] Hereinafter, a usage example of such a reflector 1 will be described. When the user wants to heat the lower mold D more than the upper mold U, for example, when the lower mold D is larger than the upper mold U, the user places the reflector 1 above the upper opening of the case A, places the upper mold U thereon, and arranges the lower mold D below the lower opening of the case A. The first leg portion 4 and the second leg portion 6 of the reflector 1 are placed on the upper opening of the case A. Then, the user turns on the power of the mold heating device M. Then, each heater H emits infrared rays.

[0028] Among the infrared rays going upward, those passing through the respective first hole portions 20 and the respective second hole portions 22 in the upper and lower thin films 12 heat the upper mold U. In each of the first hole portions 20 and the second hole portions, since the base plate 10 is exposed, the transmittance of infrared rays is higher than that of the portion covered by the thin film 12, and more infrared rays reach the upper mold U. On the other hand, among the infrared rays going upward, those reaching the portions other than the respective first hole portions 20 and other than the respective second hole portions 22 in the upper and lower thin films 12 are reflected downward with a higher reflectance than the respective first hole portions 20 and the respective second hole portions (the exposed portions of the base plate 10). The infrared rays reflected downward reach the lower mold D and heat the lower mold D. On the other hand, the infrared rays going downward reach the lower mold D and heat the lower mold D.

[0029] In this way, by installing the reflector 1, a part of the infrared rays going upward is reflected downward, and the lower mold D can be heated more than when the reflector 1 is not installed. Moreover, in the reflector 1 of the perforated type, due to the formation of the respective first hole portions 20 and the respective second hole portions 22 in the upper and lower thin films 12, the infrared rays reflected downward are further reduced and the infrared rays going upward are further increased compared to the full-surface type. Therefore, by forming the respective first hole portions 20 and the respective second hole portions 22, the heating amounts of the upper mold U and the lower mold D are adjusted. Furthermore, if a plurality of reflectors 1 having different patterns from each other are prepared, the upper and lower heating can be adjusted according to the situation of the upper mold U and the lower mold D, etc. For example, when the upper mold U does not need to be heated and only the lower mold D needs to be heated, the upper mold U may not be placed in the mold heating device M, and only the full-surface type reflector 1 according to the modified example and the lower mold D may be placed in the mold heating device M.

[0030] When the upper mold U and the lower mold D are sufficiently heated by the mold heating device M, the user turns off the power of the mold heating device M. Then, the supply of power to each heater H is cut off, the infrared radiation of each carbonaceous heating element C stops, and the heating of the upper mold U and the lower mold D by infrared rays stops. In addition, a sensor for detecting the temperature of at least one of each heater H and the heating target, and a control unit that is electrically connected to the sensor and each heater H and controls each heater H may be provided. The control unit may control at least one of the on / off and output (heat generation amount, infrared radiation amount) of each heater H based on the temperature detected by the sensor. Further, moving means for moving at least one of the reflector 1, the upper mold U, and the lower mold D with respect to the mold heating device M may be provided. The moving means may carry at least one of the reflector 1, the upper mold U, and the lower mold D into the mold heating device M, may carry it out of the mold heating device M, or may perform both carrying in and carrying out.

[0031] Such a reflector 1 has the following effects. That is, the reflector 1 has each thin film 12 as an infrared reflection part that reflects infrared rays. Each first hole 20 and each second hole 22 as infrared transmission parts that transmit infrared rays are formed in the infrared reflection part. Therefore, depending on the installation mode of the infrared transmission part, the reflection mode of infrared rays is adjusted, and the irradiation mode including the distribution of infrared rays to the upper mold U and the lower mold D can be adjusted.

[0032] Furthermore, the reflector 1 has a base plate 10 that transmits infrared rays. The infrared reflection part is each thin film 12 formed on the base plate 10. The infrared transmission part is each first hole 20 and each second hole 22 formed in each thin film 12. Therefore, in a state where adjustment is easier and in a simpler configuration, the reflection mode of infrared rays and the irradiation mode to the heating target are adjusted. Further, the thin films 12 are formed on the first surface of the base plate 10 and the second surface facing the first surface. The arrangement of each first hole portion 20 and each second hole portion 22 on the first surface is the same as the arrangement of each first hole portion 20 and each second hole portion 22 on the second surface. Therefore, in a state where adjustment is easier and in a simpler configuration, the infrared reflection mode and the irradiation mode to the heating target are adjusted. In addition, if each thin film 12 as an infrared reflection portion contains at least any one of silica, alumina, and siloxane, the infrared reflection amount is improved in a state where a sufficient service life is obtained. Further, a plurality of each thin film 12 as an infrared transmission portion are provided. Therefore, sufficient reflection of infrared rays is more easily obtained.

[0033] In addition, the first embodiment of the present invention or a modified example thereof may further have the following modified examples as appropriate. In the mold heating device M, the number of heaters H is two or less including one (singular) or four or more, or a plurality of reflecting plates 1 are placed in the mold heating device M, etc. At least any one of the mold heating device M, the reflecting plate 1 itself, and the number, material, and arrangement of various members or parts in these may be changed. The change in the number of various members or parts may include setting it to zero, that is, omission of various members or parts.

[0034] FIG. 4 is a top view of a reflecting plate body 102 of a reflecting plate according to the second embodiment of the present invention. The second embodiment is different from the first embodiment only in the reflecting plate body. For members and parts having the same configuration as those in the first embodiment in the second embodiment, the same reference numerals as those in the first embodiment are appropriately assigned, and the description thereof is omitted.

[0035] The reflecting plate body 102 of the second embodiment has a base plate 10 and two thin films 112.

[0036] Each thin film 112 is formed on the upper surface and the lower surface of the base plate 10. Each thin film 112 is the same as each other except for the surface of the base plate 10 on which it is arranged. Hereinafter, unless otherwise specified, the thin film 112 on the upper surface is described, and the description of the thin film 112 on the lower surface is appropriately omitted. The thin film 112 is formed in the same manner as the thin film 12 of the first form, except for the perforated type embodiment. The thin film 112 has a plurality (here, 12) of third holes 122. Each third hole 122 is formed in the same manner as each second hole 22 in the first form. The perforated type of the thin film 112 is obtained by removing the first hole 20 from the perforated type of the thin film 12 of the first form.

[0037] In the reflector of the second form, the thin film 112 of the reflector body 102 has only each third hole 122 corresponding to each second hole 22 in the thin film 12 of the first form, and does not have a hole corresponding to each first hole 20 in the thin film 12 of the first form. Therefore, when the reflector is disposed below the upper mold U in the same manner as in the usage example of the first form, the infrared rays reaching the central portion in the front-rear direction of the reflector body 102 are reflected downward. Therefore, in the reflector of the second form, compared with the reflector 1 of the first form, the infrared rays downward are further increased, and the lower mold D is heated more than the upper mold U. Also, in the reflector of the second form, the upper mold U is heated more on both sides in the front and rear of the central portion in the front-rear direction than the central portion in the front-rear direction. The user can use the reflector 1 of the first form, the full-surface type reflector 1 according to the modification example of the first form, or the reflector of the second form appropriately according to the situation of at least one of the upper mold U and the lower mold D, so as to perform more appropriate heating on at least one of the upper mold U and the lower mold D. Moreover, the heating according to the situation can be realized if an appropriate type of reflector is placed, and it can be performed more easily compared with the case where the configuration and control of the mold heating device M are changed.

[0038] For example, focusing on a set of reflectors including the reflector 1 of the first form and the reflector of the second form, this set has the following effects. That is, the set of reflectors includes a first reflector 1 and a second reflector. The first reflector 1 has each thin film 12 as a first infrared reflecting portion that reflects infrared rays. In each thin film 12, each first hole 20 and each second hole 22 as a first infrared transmitting portion that transmits infrared rays are formed. The second reflector has each thin film 112 as a second infrared reflecting portion that reflects infrared rays. In each thin film 112, each third hole 122 as a second infrared transmitting portion that transmits infrared rays is formed. The arrangement of each first hole 20 and each second hole 22 is different from the arrangement of each third hole 122. Therefore, a set of reflectors is provided in which the irradiation mode of infrared rays on the object to be heated can be adjusted depending on whether the user places the first reflector 1 or the second reflector.

[0039] In addition, the second embodiment or a modified example thereof may have a modified example similar to the first embodiment as appropriate. Furthermore, a part or all of the first embodiment or a modified example thereof and a part or all of the second embodiment or a modified example thereof may be appropriately combined. At least any one of the third embodiment and subsequent embodiments may have a modified example similar to other embodiments, and may be appropriately combined with a part or all of other embodiments.

[0040] FIG. 5 is a rear view of a reflector 201 and a heater H according to a third embodiment of the present invention. In the third embodiment, reflectors 201 related to each thin film 212 of the full-surface type (here, five sheets) are used. The third embodiment relates to a set S1 of reflectors containing a plurality of reflectors 201. Note that the thin films 212 in some or all of the reflectors 201 may be of the perforated type. Also, the reflector 201 may have the thin film 212 only on the first surface or the second surface. In the third embodiment, each rectangular reflector 201 extending in the front-rear and lateral directions is disposed below or on the side of a heater H serving as an infrared radiation source extending in the front-rear direction. The five reflectors 201 surround the lower and side portions that are part of the periphery of the heater H. More specifically, a horizontal reflector 201 is disposed below the heater H. Further, on both the left and right sides of the reflector 201, inclined reflectors 201 are disposed in an inclined posture such that they are positioned higher as they go outward in the left-right direction. Further, on both the left and right sides of these three reflectors 201, reflectors 201 are disposed in an inclined posture such that they are positioned higher as they go outward in the left-right direction and are closer to a vertical posture compared to the posture of the reflector 201 adjacent to the horizontal reflector 201.

[0041] In the third embodiment, among the infrared rays R radiated from the heater H extending in the front-rear direction, those heading toward both the left and right sides and downward are reflected upward by a set S1 of reflectors including the five reflectors 201. Further, among the infrared rays R radiated from the heater H, those heading upward go straight upward. Therefore, the infrared rays R from the heater H are collected above the heater H extending in the front-rear direction by the set S1 of reflectors, contributing to more efficient heating of the object to be heated disposed above the heater H.

[0042] The set S1 of reflectors according to the third embodiment has the following operational effects. That is, the set S1 of reflectors includes a plurality of reflectors 201. Each reflector 201 has each thin film 212 that reflects infrared rays. The plurality of reflectors 201 are arranged in a state of surrounding a part of the periphery of the heater H. Thus, the irradiation mode of the infrared rays onto the object to be heated can be adjusted to a mode in which the irradiation amount further increases by the set S1 of reflectors.

[0043] FIG. 6 is a perspective view of a reflector 301 and a heater HB according to the fourth embodiment of the present invention. In the fourth embodiment, a plurality (here, 18) of reflectors 301 related to each full-surface type thin film 312 are used. In the fourth embodiment, each triangular reflector 301 is arranged below or on the side of a spherical heater HB as an infrared radiation source. The spherical heater HB is, for example, an infrared light bulb. The 18 reflectors 301 constitute a set S2 of reflectors. The 18 reflectors 301 surround the lower part, the left and right sides, the front and the rear, which are part of the periphery of the heater HB. More specifically, six substantially horizontal reflectors 301 are arranged below the heater HB in a state of forming a regular hexagon as a whole. Further, six inclined reflectors 301 are arranged in front of, left front, left rear, rear, right rear, and right front of those reflectors 301. Furthermore, a total of six reflectors 301 are arranged one by one between each of the six inclined reflectors 301 surrounding the heater HB. The 18 reflectors 301 are along a virtual parabolic surface.

[0044] In the fourth embodiment, among the infrared rays radiated omnidirectionally from the spherical heater HB, those directed to the left and right sides, the lower part, the front, and the rear are intensively reflected upward by the set S2 of reflectors including the 18 reflectors 301. Among the infrared rays radiated from the spherical heater HB, those directed upward go upward as they are. Therefore, the infrared rays from the heater HB are collected by the set S2 of reflectors in a narrower range than the set S1 of reflectors in the third embodiment above the heater HB, contributing to more intensive and efficient heating of the object to be heated arranged above the heater HB.

[0045] The set S2 of reflectors according to the fourth embodiment has the following effects. That is, the set S2 of reflectors includes a plurality of reflectors 301. Each reflector 301 has each thin film 212 that reflects infrared rays. The plurality of reflectors 301 are arranged surrounding a part of the periphery of the heater HB. Therefore, the irradiation mode of the infrared rays on the object to be heated can be adjusted to a mode in which the irradiation amount further increases by the set S2 of reflectors.

Explanation of Reference Numerals

[0046] 1,201,301 ··· Reflector, 2,102 ··· Reflector body, 10 ··· Base plate, 12, 122, 212, 312 ··· Thin film (infrared reflection part), 20 ··· First hole part (infrared transmission part), 22 ··· Second hole part (infrared transmission part), 122 ··· Third hole part, D ··· Lower mold (object to be heated), H, HB ··· Heater (infrared radiation source), R ··· Infrared ray, S1, S2 ··· Set of reflectors, U ··· Upper mold (object to be heated).

Claims

1. It has an infrared reflection part that reflects infrared rays, and an infrared transmission part that transmits infrared rays is formed in the infrared reflection part. A reflector characterized by this.

2. Furthermore, it has a base plate that transmits infrared rays, the infrared reflection part is a thin film formed on the base plate, and the infrared transmission part is a hole formed in the thin film. The reflector according to claim 1, characterized by this.

3. The thin film is formed on the first surface of the base plate and the second surface facing the first surface, and the arrangement of the holes on the first surface is the same as the arrangement of the holes on the second surface. The reflector according to claim 2, characterized by this.

4. The infrared reflection part contains at least any one of silica, alumina, and siloxane. The reflector according to claim 1, characterized by this.

5. A plurality of the infrared transmission parts are provided. The reflector according to claim 1, characterized by this.

6. A first reflector having a first infrared reflection part that reflects infrared rays, and a first infrared transmission part that transmits infrared rays is formed in the first infrared reflection part, a second reflector having a second infrared reflection part that reflects infrared rays, and a second infrared transmission part that transmits infrared rays is formed in the second infrared reflection part, including, and the arrangement of the first infrared transmission part is different from the arrangement of the second infrared transmission part. A set of reflectors characterized by this.

7. It includes a plurality of reflectors each having an infrared reflection part that reflects infrared rays, and the plurality of reflectors are arranged in a state of surrounding a part around an infrared radiation source. A set of reflectors characterized by this.

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