JP5568593B2 - LIGHTING APPARATUS REFLECTING MEMBER MOLDED BODY, AND LIGHTING EQUIPMENT REFLECTING MEMBER MOLDING - Google Patents

Description

  The present invention relates to a molded member for a reflecting member used in a lighting fixture and a method for producing the same.

  Conventionally, in a lighting fixture, an umbrella-like reflecting member may be used on the back side of the illumination. By reflecting the light emitted from the illumination to the lower side of the illumination by the reflecting member, the illuminance below the lighting fixture can be obtained.

  As such a reflection plate, for example, there is a reflection plate in which a film is formed on the surface of a metal substrate (Patent Document 1). Moreover, there exists a reflection member made from resin (patent document 2).

  Conventionally, when a resin-made reflecting member is used, the reflecting plate is bent and used as in Patent Document 3.

JP 7-21816 A Japanese Patent No. 2925745 JP 2008-123715 A

  The above-described lighting fixture is used, for example, with a plurality of lights attached to the ceiling of a building. In this case, an acid or alkaline solution may be used in a building such as a factory. In contrast, the metal reflector described in Patent Document 1 has a problem that the reflector corrodes in a corrosive environment such as acid or alkali.

  Also, in buildings such as factories, large lighting fixtures may be used due to the high ceiling. Therefore, a large reflecting member is required for such a lighting fixture. However, it is difficult to mold a foamable reflector as in Patent Document 2 in a large size. In particular, when trying to mold a large reflector, it is difficult to obtain a uniform and high reflectivity because the foamed layer inside is crushed unevenly.

  Moreover, such illumination is installed on the ceiling at predetermined intervals. Therefore, even if a sufficient illuminance can be obtained immediately under the illumination, the illuminance may decrease between the illuminations. However, if the lighting installation interval is reduced, the installation cost increases and more power is consumed. Therefore, in such a large reflecting member, it is desirable that the illumination light is effectively and uniformly reflected with high reflectance, and the light is efficiently diffused throughout.

  Moreover, when processing a reflecting plate according to the shape of a light source like patent document 3, there existed a problem that processing took time and productivity was bad.

  The present invention has been made in view of such problems, and has a high reflectance, can diffuse light efficiently, has excellent productivity, and is advantageous in terms of cost. The object is to provide a body and a method for producing the same.

In order to achieve the above-described object, the first invention is a molded article for a reflecting member for a lighting fixture, and is formed so as to cover a lighting mounting portion and the periphery of the lighting mounting portion, and has a volume of 1 to 60 L. A thickness of 0.2 mm or more, and an umbrella-shaped reflecting portion having an upwardly convex curved surface. The reflecting portion is made of a resin foam, and the average cell diameter of the resin foam is 0. 0.5 μm to 10 μm, and the specific gravity of the resin foam is 0.7 or less. In the cross section, an unfoamed layer is formed on the inner surface and the outer surface of the reflecting portion, and the total reflectance and diffuse reflection of the reflecting portion are formed. The light transmittance of the reflecting portion is 2% or more and less than 5%, and the illumination light arranged on the inner surface side can be transmitted to the outer surface side of the reflecting portion. Diffuse light to both the bottom and side of the molded object It is the molded object for lighting fixture reflecting members characterized by these.

  By setting it as such a structure, since a reflection member is formed with a resin foam, it is excellent in corrosion resistance. Therefore, it can be applied to factories that handle acids and alkalis. Moreover, a reflectance is 94% or more, and has a high reflectance. Furthermore, light can be uniformly diffused by the internal foam layer.

Moreover , even if the thickness of the reflecting portion is large, the reflecting portion transmits light, so that light can be leaked to the outside of the reflecting plate. For this reason, light can be diffused throughout the room.

In addition, when the light transmittance of the reflecting portion is 2% or more and less than 5%, an effect by the transmitted light can be obtained, and sufficient illuminance can be obtained without reducing the reflected light.

The reflective portion is a foam polyethylene terephthalate or polycarbonate, it is desirable bubble number density of the portion excluding the unfoamed layer is 10 ^ 9-10 ^ 15 / cm ^3.

When the cell number density of the foamed layer formed inside the surface unfoamed layer is 10 ^ 9 to 10 ^ 15 / cm ³ , a high reflectance can be obtained. If the bubble number density is less than 10 ^ 9 / cm ³ , the reflectivity decreases because the number of bubbles is too small, and if it exceeds 10 ^ 15 / cm ³ , light is transmitted, so the reflectivity is also decreased.

  By setting the average bubble diameter of the foam to 0.5 μm to 10 μm, a large number of fine bubbles can be dispersed. Therefore, a high reflectance can be obtained.

  The molded article for a lighting fixture reflecting member preferably has a volume of 60 L or less. More preferably, it is 1-60L. If it is less than 1 L, the illumination used in factories or the like is too small and is not suitable. If it exceeds 60 L, it is difficult to control the thickness at the time of molding, and sufficient reflectance may not be ensured.

  The present invention is particularly effective for such a large reflecting member molded body.

  2nd invention is the manufacturing method of the molded object for lighting fixture reflecting members concerning 1st invention, Comprising: Thickness is 0.2 mm or more, and the resin foam by which the unfoamed layer was formed in both surfaces in the cross section Using the material, the resin foam material is placed in the mold, and the resin foam material heated to a predetermined temperature is exhausted from the mold to form the resin foam material into the inner shape of the mold. It is the manufacturing method of the molded object for lighting fixture reflecting members characterized by doing.

  Conventionally, since it has been difficult to control the heating temperature of a large sheet before molding sufficiently uniformly, the thickness after molding tends to be non-uniform and it is difficult to keep the internal fine foam uniform. In the present invention, by sufficiently uniforming the heating temperature of the sheet before molding, it is possible to reliably mold a large foam molded article without crushing the fine bubbles inside.

  It can also be created with a composite sheet. The composite sheet is a laminated sheet and is not particularly limited, but a combination of a foamed sheet and a foamed sheet, or a foamed sheet and a solid sheet (non-foamed sheet) can be combined. The lamination method (laminate) is not particularly limited, and a general method can be used. For example, it can be laminated by heating lamination, adhesive or the like. The thickness of the composite sheet is preferably 0.2 to 2.0 mm after lamination.

  According to the present invention, it is possible to provide a large and lightweight molded article for a lighting fixture reflecting member that has a high reflectance and can diffuse light efficiently, and a method for manufacturing the same.

The perspective view which shows the cross section of the reflecting member molded object 1. FIG. (A) is a perspective view which shows the resin foam raw material 7, (b) is the A section expanded sectional view of (a). The figure which shows the process of shape | molding the resin foam material 7. The figure which shows the process of shape | molding the resin foam material 7. The figure which shows the other process of shape | molding the resin foam material 7. The figure which shows the use condition of the reflecting member molded object 1. FIG. The C section enlarged view of FIG. The perspective view which shows the reflection member molded object 1a. The figure which shows the use condition of the reflecting member molded object 1a.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a reflecting member molded body 1. The reflecting member molded body 1 is a molded body used as a lighting fixture. The top of the center of the reflecting member molded body 1 serves as the illumination mounting portion 3. Moreover, the reflection part 5 is formed so that a diameter may be expanded as it goes below from the illumination attachment part 3. As shown in FIG. That is, the reflecting member molded body 1 has an umbrella-shaped three-dimensional shape. The illumination attachment part 3 and the reflection part 5 are integrally formed. By attaching illumination to the illumination attachment portion 3, light emitted from the illumination can be reflected by the inner surface of the reflection portion 5 and diffused below or around the lighting fixture.

  The reflection part 5 is formed of a resin foam. Therefore, the reflection part 5 does not corrode even in a factory that handles acids and alkalis. Therefore, the reflectance and the like do not deteriorate over a long period. Moreover, since the reflecting member molded object 1 is resin, it is lightweight.

  The reflecting member molded body 1 is used, for example, for a large luminaire used in a factory or the like. Therefore, the reflecting member molded body 1 is large-sized, and the volume of the umbrella-shaped molded body is 60 L or less.

  Next, the manufacturing method of the reflecting member molded body 1 will be described. FIG. 2A is a perspective view showing the resin foam material 7 before molding of the reflecting member molded body 1, and FIG. 2B is an enlarged sectional view of a portion A in FIG. The resin foam material 7 is a sheet-like member.

  The resin foam material 7 is a porous body having fine bubbles 11 which are closed cells. More specifically, a thermoplastic resin sheet having fine bubbles or pores having an average cell diameter of 0.5 μm or more and 10 μm or less inside can be suitably used. If the average bubble diameter is 10 μm or less, a large number of fine bubbles can be dispersed, so that the reflectance can be improved. In addition, as for the reflectance of the resin foam raw material 7, it is desirable that the total reflectance is 94% or more.

  Further, the specific gravity of the resin foam material 7 is preferably 0.7 or less, more preferably the specific gravity is less than 0.6, and the specific gravity is more preferably less than 0.5. When the specific gravity is large, the distribution of the fine bubbles 11 is not sufficient, and the effect of the fine bubbles is reduced.

  Examples of the material of the resin foam material 7 include general-purpose resins such as polyethylene, polypropylene, polystyrene, polyvinyl chloride, polychlorinated biphenyl, polyethylene terephthalate, and polyvinyl alcohol, polycarbonate, polybutylene terephthalate, polyethylene naphthalate, polyamide, polyacetal, and polyphenylene. Engineering plastics such as ether, ultra high molecular weight polyethylene, polysulfone, polyether sulfone, polyphenylene sulfide, polyarylate, polyamideimide, polyetherimide, polyetheretherketone, polyimide, polytetrafluoroethylene, liquid crystal polymer, fluororesin, or The fine resin foam sheet which consists of these copolymers or a mixture is mentioned. Among these, a fine resin foam sheet made of polyethylene terephthalate, polyphenylene sulfide, polypropylene, or cyclopolyolefin is preferable because of its good heat resistance, impact resistance, and the like, and particularly preferably polyethylene terephthalate or polycarbonate. .

  In the present invention, a crystallization nucleating agent, a crystallization accelerator, an aerated nucleating agent, and an antioxidant are added to the thermoplastic resin sheet before foaming within a range that does not affect the properties of the obtained reflecting member molded body 1. Agent, antistatic agent, anti-UV agent, light stabilizer, fluorescent whitening agent, pigment, dye, compatibilizer, lubricant, reinforcing agent, flame retardant, crosslinking agent, crosslinking aid, plasticizer, thickener, reduction Various additives such as a sticking agent may be blended.

  Moreover, the resin containing the said additive may be laminated | stacked on the obtained resin foam raw material 7, and the coating material containing the said additive may be coated. Applying a layer containing a UV inhibitor to at least one surface of the polyester resin foam is sufficient to prevent UV deterioration even when thermoplastic polyester resins or polyester elastomers that are susceptible to UV deterioration are used. Is particularly preferable.

  Further, as shown in FIG. 2B, unfoamed layers 9 are formed on both surfaces of the resin foam material 7. The unfoamed layer 9 is a region where fine bubbles are not present (or are present only minutely compared to the central portion). If the unfoamed layer 9 is too thin, the effect of improving rigidity is small. Therefore, in order to increase the rigidity of the reflector, the thickness of the unfoamed layer 9 is preferably 15 μm or more, and more preferably 20 μm or more.

  The resin foam material 7 is manufactured as follows, for example. Here, as a method for introducing air bubbles into the sheet, for example, a batch foaming method in which a resin sheet is impregnated with gas in a pressure vessel and then heated and foamed, or a thermoplastic resin sheet is extruded from a die of an extruder. There are an extrusion foaming method in which foaming is performed, and a stretching method in which a void is formed at the interface between the filler and the resin by extruding a thermoplastic resin sheet containing a filler and then stretching. Here, the manufacturing method of the resin foam raw material 7 by a batch foaming method is shown as an example. In the case of the batch foaming method, there are advantages that the bubbles are more easily refined than the extrusion foaming method, thicker than the stretching method, and easy to reduce the specific gravity.

  In the batch foaming method, first, a thermoplastic resin sheet is produced, and a roll is formed by overlapping and winding the thermoplastic resin sheet and a separator. The separator used here may be any one as long as it has a void through which an inert gas or an organic solvent used as needed freely enters and exits, and the permeation of the inert gas into itself can be ignored. . As the separator, a resin nonwoven fabric or a metal net is particularly suitable.

  On the other hand, the thermoplastic resin sheet is preferably unstretched. This is because when the thermoplastic resin sheet is stretched, the gas does not sufficiently permeate into the sheet, and the intended foamed sheet cannot be obtained.

  In the above method, the resin sheet may contain an organic solvent before the roll made of the resin sheet and the separator is held in the pressurized inert gas atmosphere and the resin sheet contains the inert gas. When an organic solvent is contained in the sheet, the crystallinity of the thermoplastic resin sheet can be increased to 30% or more. As a result, the rigidity of the sheet is increased and it is difficult for the trace of the separator to remain on the surface of the sheet, and the permeation time of the inert gas can be shortened. Depending on the type of separator, the trace of the separator may not remain on the surface of the sheet, so that the treatment containing the organic solvent is not necessarily required. However, from the viewpoint of shortening the gas permeation time, it is preferable to carry out a treatment containing an organic solvent.

  Organic solvents used to increase the crystallinity of the resin sheet include benzene, toluene, methyl ethyl ketone, ethyl formate, acetone, acetic acid, dioxane, m-cresol, aniline, acrylonitrile, dimethyl phthalate, nitroethane, nitromethane, benzyl alcohol Etc. Of these, acetone is more preferable from the viewpoints of handleability and economy.

  Next, the obtained roll is put in a high-pressure vessel and held in a pressurized inert gas atmosphere so that the thermoplastic sheet contains an inert gas that becomes a foaming agent. Examples of the inert gas include helium, nitrogen, carbon dioxide, and argon. Among these, carbon dioxide is preferable because it can be contained in a large amount in the thermoplastic polyester.

  Next, the roll is taken out from the high-pressure vessel and foamed by heating to a temperature equal to or higher than the softening temperature of the resin sheet under normal pressure while removing the separator. Under the present circumstances, after taking out from a high pressure container, the bulk specific gravity of the foam obtained can be adjusted by adjusting the time until it makes it foam.

  Specifically, the longer this time, the larger the bulk specific gravity. In addition, the heating temperature at the time of foaming is set to the melting point or less above the glass transition point of the resin.

  At this time, an unfoamed layer 9 is formed on the surface layer of the foam. The non-foamed layer 9 is formed, for example, by the gas that has permeated the inside from the surface of the resin sheet before foaming. By reducing the amount of gas on the surface of the resin sheet, the fine bubbles 11 are not generated in the vicinity of the surface layer of the resin sheet during the subsequent foaming treatment, or the generation amount thereof is reduced. Therefore, in the non-foamed layer 9, the fine bubbles 11 are hardly observed and become a solid resin portion.

  As such a resin foam material 7, for example, MCPET (registered trademark) or MCPOLYCA (registered trademark) manufactured by Furukawa Electric Co., Ltd. can be suitably used.

  Next, the resin foam material 7 manufactured in this way is cut into a predetermined size. Moreover, as shown in FIG. 3, the cut | disconnected resin foam raw material 7 is set between metal mold | die 13a, 13b. The mold 13 a is a male mold having a shape close to the substantially inner surface shape of the reflecting member molded body 1. One mold 13 b is a female mold that forms the outer shape of the reflecting member molded body 1.

  An exhaust hole (not shown) is formed in the mold 13b. An exhaust device (not shown) is connected to the exhaust hole. That is, air can be exhausted from the inner surface of the mold 13b.

  First, the resin foam material 7 having a predetermined size is placed on the mold 13b. At this time, the periphery of the resin foam material 7 is gripped by the gripping member. Next, the resin foam material 7 is uniformly heated by a heater (not shown). The mold 13a is lowered while the resin foam material 7 is at a predetermined temperature or higher. At this time, the internal air is exhausted from the mold 13b. That is, the mold 13b is evacuated.

  As shown in FIG. 4, when the mold 13a is completely fitted to the mold 13b, the resin foam material 7 is pressed against the mold 13b by pressing by the mold 13a and exhaust. When the mold 13a is closed, a gap may be formed between the mold 13a and the resin foam material 7. The resin foam material 7 is roughly deformed entirely by the mold 13a, and final molding can be performed by close contact with the mold 13b by vacuuming.

  Here, as a molded object after shaping | molding, it is desirable that it is 0.2 mm or more. If the thickness of the molded body is less than 0.2 mm, the rigidity is low, which is not preferable. From the viewpoint of increasing the rigidity, the thickness of the molded body is preferably 0.2 mm or more, and more preferably 0.25 mm or more. Therefore, what is necessary is just to adjust the thickness of the resin foam raw material 7 so that the thickness of the molded object after shaping | molding may become the said range.

  In addition, the reflection member molded object 1 of this invention is not restricted to the case where it vacuum-forms using a pair of male metal mold | die and a female metal mold | die as mentioned above. For example, as shown in FIG. 5, vacuum forming may be performed using only a mold 13b which is a female mold. In this case, first, as shown in FIG. 5A, the resin foam material 7 is placed on the mold 13b and heated to a predetermined temperature by the same method as described above. In this state, as shown in FIG. 5B, the resin foam material 7 can be vacuum-molded by the mold 13b by evacuating the mold 13b and evacuating it.

  As described above, the mold 13a is not necessarily required if substantially uniform molding is possible according to the shape and size of the reflecting member molded body 1. Moreover, when using the metal mold | die 13a, you may further pressurize from the surface of the metal mold | die 13a. In any case, by forming the reflecting member molded body 1 by vacuum forming, the uniform fine bubbles 11 can be obtained without losing the internal fine bubbles 11 and with the unfoamed layer 9 remaining on the surface. It is possible to obtain a reflecting member molded body having the following.

  Next, the function of the reflecting member molded body 1 will be described. FIG. 6 is a cross-sectional view showing a usage state of the reflecting member molded body 1. An illumination 15 is attached to the illumination attachment portion 3 of the reflecting member molded body 1. The illumination 15 may be a mercury lamp, a halogen lamp, an LED, or the like. A part of the light irradiated from the illumination 15 is irradiated downward as it is, and a part of the light is irradiated toward the reflecting portion 5 (D in the figure). On the inner surface of the reflecting portion 5 formed so as to cover the illumination 15, light is reflected and diffused downward (E in the figure). Moreover, a part of the light irradiated to the reflection part 5 permeate | transmits the reflection part 5, and light leaks outside (F in a figure).

  FIG. 7 is an enlarged view of a part C in FIG. 6 and is a diagram showing a light reflection state in the reflection part 5. A part of the light (D in the figure) applied to the reflecting portion 5 is reflected by the surface of the non-foamed layer 9 and a part of the light is reflected by the surface of the internal microbubbles 11. Therefore, the light reflected by the inner surface (right side in the figure) of the reflecting portion 5 is appropriately diffused (E in the figure). In the present invention, the reflecting portion 5 is made of a resin foam having a predetermined property, and thus has a very high reflectance. Specifically, the total reflectance and the diffuse reflectance are 94% or more.

  On the other hand, a part of the irradiated light is diffused in the reflecting portion 5 and transmitted to the outer surface side (F in the figure). Therefore, the transmitted light is also diffused moderately and leaks out of the reflecting portion 5. Therefore, light can be diffused not only to the lower part of the reflecting member molded body 1 but also to the side. In the present invention, the transmittance of the reflecting member molded body 1 to the outside is 2% or more and less than 5%. If the transmittance is less than 2%, the transmitted light is too weak, so that the light diffusion effect is small. On the other hand, if the transmittance is 5% or more, it is necessary to lower the total reflectance described above, so that the function as a reflecting member is lowered. Therefore, the transmittance of the reflecting member molded body 1 to the outside is desirably 2% or more and less than 5%.

  As mentioned above, according to this invention, since the reflection part 5 has the microbubble 11 inside and has the non-foamed layer 9 on the surface, it can make very high reflectance and weight reduction compatible. Moreover, since it is made of resin, there is no risk of corrosion. Moreover, the reflecting member molded body 1 of the present invention can transmit some light to the outside. For this reason, since light diffuses also to the side of the luminaire, the interior of the building is illuminated uniformly, and, for example, a shadow is unlikely to occur at the operator's hand.

  The use of the reflecting member molded body 1 according to the present invention is not limited. For example, a light reflector for LED lamps, a light reflector for automobile headlights, a light reflector for automobile backlights, a light reflector for indoor lighting, It can be used as a light reflector for electric signboards, a light reflector for solar panels, a light reflector for liquid crystal televisions, and the like.

  Moreover, it is also applicable to the long reflecting member molded body 1a as shown in FIGS. The reflecting member molded body 1a is applied to a reflecting member for straight tube illumination such as a fluorescent lamp. Note that. In the present invention, the long member means a member in which a predetermined cross-sectional shape is continuously formed in the longitudinal direction within a predetermined range.

  The reflecting member molded body 1a can also be molded by vacuum molding in the same manner as described above. In this case, the degree of freedom in shape is greater than in the case of bending an ordinary plate member. For this reason, an assembly process can be abbreviate | omitted compared with the shaping | molding by the conventional bending process.

  As shown in FIG. 9, the reflecting member molded body 1a also illuminates the lower part with high reflectivity, as well as the reflecting member molded body 1 described above, and the light diffuses when reflected, so that the illumination area is expanded and the illuminance is increased. Can be made uniform. Note that the reflecting member molded body 1a can also transmit part of the light sideways.

  In Example 1, a 0.8 mm-thick fine resin foam sheet (MCPET manufactured by Furukawa Electric Co., Ltd.) was preheated, and heated using an infrared heater so that the entire sheet became uniform up to the softening point temperature. As shown in FIG. 5, vacuum molding was performed using a mold, and a cup-shaped light reflecting molded body having a volume of 16 L and having a circular shape in plan view was molded. Comparative Example 1 was molded under the same conditions as in Example 1 except that the volume was 70 L. Each was evaluated by n = 5. The results are shown in Table 1.

  In addition, as Comparative Example 2, a metallic aluminum reflector (with graining) was used, and as Comparative Example 3, a white steel reflector was used. The results are shown in Table 2.

<Measurement of molded body thickness>
A molded body was selected at random, cut into a predetermined size, and the thickness was measured with a dial gauge.

<Measurement of optical properties>
About the reflecting member molded object of this invention, the total reflectance, the diffuser plate reflectance, and the transmittance | permeability were measured as an optical characteristic. The measurement was performed on the sample whose thickness was measured using a spectrophotometer “UV-3100PC” manufactured by Shimadzu Corporation.
Barium sulfate was used as a standard sample. The basic measurement concept conforms to “JIS K7105” (old).

  From the results, in Example 1, the thickness was relatively uniform, and the optical characteristics were uniform and excellent values. On the other hand, Comparative Example 1 resulted in non-uniform thickness and non-uniform bubbles, and varied optical characteristics.

  From the results, it was found that the metal reflector had a lower reflectance than that of the example.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

DESCRIPTION OF SYMBOLS 1 ......... Reflective member molded object 3 ......... Light mounting part 5 ......... Reflection part 7 ......... Resin foam material 9 ......... Unfoamed layer 11 ......... Fine bubbles 13a, 13b ......... Mold 20 ……… Optical measuring device

Claims (3)

A molded article for a reflecting member for lighting equipment,
An illumination attachment portion, and an umbrella-shaped reflection portion formed so as to cover the periphery of the illumination attachment portion, having a volume of 1 to 60 L, a thickness of 0.2 mm or more, and an upwardly convex curved surface ; Equipped,
The reflective portion is made of a resin foam, and the resin foam has an average cell diameter of 0.5 μm to 10 μm,
The specific gravity of the resin foam is 0.7 or less, and in the cross section, an unfoamed layer is formed on the inner surface and the outer surface of the reflecting portion,
The total reflectance and diffuse reflectance of the reflecting portion are 94% or more, and the light transmittance of the reflecting portion is 2% or more and less than 5%. It is transmissive to the outer surface side,
A molded article for a luminaire reflecting member, wherein light is diffused to both a lower part and a side of the molded article for a luminaire reflecting member. The said reflection part is a foam of a polyethylene terephthalate or a polycarbonate, and the bubble number density of the part except the said non-foamed layer is 10 ^ 9-10 ^ 15 piece / cm < ³ >, It is characterized by the above-mentioned. The molded object for lighting fixture reflecting members. A method for producing a molded article for a lighting fixture reflecting member according to any one of claims 1 to 2 ,
Using a resin foam material with a thickness of 0.2 mm or more and an unfoamed layer formed on both sides in the cross section,
The resin foam material is placed in a mold, and the resin foam material heated in advance to a predetermined temperature is exhausted from the mold, thereby forming the resin foam material into an inner shape of the mold. A manufacturing method of a molded article for a lighting fixture reflecting member.

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