JP2007190722A - Method for forming coat on surface of synthetic resin lighting implement component and synthetic resin lighting implement component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for forming a coat on the surface a reflector body which is simple in process facility and can curtail a process time. <P>SOLUTION: After a primary molding W1 (a reflector body 1) made of a thermosetting resin (FRP) is injection-molded by the first cavity C1 of a molding apparatus 20 having a pair of molds 21 and 25 the temperatures of which are adjusted to be suitable for the curing of the packed thermosetting resin, a second thermosetting resin is packed in a second cavity C2 formed by moving the mold 25 slightly in relation to the primary molding W1 to mold a secondary molding W2 in which the coat 2 is integrated with the primary molding W1 (the reflector body 1). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  An aluminum vapor-deposited film is formed on the surface of synthetic resin vehicle lamp components such as reflectors and extension reflectors, but in general, an undercoat film is formed on the surface of the injection molded synthetic resin lamp components Then, after the surface is smoothed, an aluminum vapor deposition film is formed.

  The present invention relates to a method for forming a surface film of a synthetic resin lamp component and a surface coating for forming a surface film such as an undercoat film for performing a process such as aluminum deposition on an injection molded synthetic resin lamp component member body. It is related with the synthetic resin lamp component member made.

  For example, as a conventional method of forming an undercoat film on the reflector body, a resin reflector body, which is a primary molded product, is formed by injection molding using a mold, and the primary molded product taken out of the mold is placed in the painting booth. It has been known for a long time to form an undercoat film by spray-coating, and then to dry the undercoat film in a drying furnace. However, it requires a large painting booth and a drying furnace that are completely different from the equipment used in the resin injection molding process. In addition to taking up installation space, it takes a long time to form a coating after molding the primary molded product. In spray coating, there is a problem that coating mist is scattered, so that the coating efficiency of the coating is very low, the coating efficiency is poor, the defect rate due to dust and sagging is large, and the yield is also poor.

  Therefore, in the following Patent Document 1, in order to solve the above-described problems, the resin reflector main body is injection-molded by the first mold, and the reflector main body taken out from the first mold is secondly transferred by the transfer robot. There has been proposed a method in which an undercoat film is integrally formed on the surface of a reflector body by transferring and inserting into a mold and injecting a resin which is an undercoat film constituent material into a second mold.

JP 2002-160256

  However, in the method shown in Patent Document 1, although the above-described various problems are solved, a transfer robot is required as process equipment in addition to the first mold and the second mold, and the arrangement space of the process equipment In addition, since the primary molded product is transferred from the first mold to the second mold, there is a limit to shortening the time required for the molding cycle.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and its purpose is to provide a method for forming a surface film of a synthetic resin lamp component member that has a simple process facility and can shorten the process time, and an inexpensive and stable quality synthesis. The object is to provide a resin lamp component.

In order to achieve the above object, in the method for forming a surface film of a synthetic resin lamp component member according to claim 1, a synthetic resin lamp device for forming a surface film in a predetermined region of an injection molded synthetic resin lamp component member body In the method of forming the surface film of the component member,
A first cavity defined by a pair of molds composed of a fixed mold and a movable mold that have been adjusted to a predetermined temperature in advance is filled with a thermosetting resin that is a material constituting the lamp component member body. Then, after the lamp component member main body that is a primary molded product is molded, the movable mold is moved by a predetermined amount with respect to the primary molded product, and the second cavities defined by the thermosetting property that is the coating material. A secondary molded product in which a film was integrated with the lamp component member main body, which is the primary molded product, was formed by filling the resin.
(Function) A molding apparatus (a first mold defined by both molds) having a pair of molds (an opposing fixed mold and movable mold) that are adjusted to an appropriate temperature so that the filled thermosetting resin is cured. 1), the first molded product (the thermosetting resin lamp component member main body) is injection-molded, and then the movable side mold is moved by a predetermined amount relative to the primary molded product. Fill the cavity with a thermosetting resin, which is a film constituent material, and mold a secondary molded product in which the thermosetting resin coating is integrated with the primary molded product (thermosetting resin lamp body component body). .

  Even after being cooled and cured, the thermosetting resin does not soften (melt) once cured, whereas the thermoplastic resin has the property of softening (melting) when heated. Even if a new thermosetting resin (film constituent material) is injected along the primary molded product (cured thermosetting resin lamp component), the resin of the primary molded product is injected into the injected new thermosetting resin. Does not soften and melt and mix. For this reason, by setting the temperature of the mold to a predetermined temperature at which the injected thermosetting resin is cured, the primary molded product (lamp configuration) follows the primary molding step of primary molding of the lamp component main body. A secondary molding step of integrating the surface coating onto the member body) can be performed.

According to a second aspect of the present invention, in the method for forming a surface film of the synthetic resin lamp component member according to the first aspect, at least the second cavity among the thermosetting resins respectively filled in the first and second cavities. The thermosetting resin to be filled is adjusted to a predetermined temperature sufficiently lower than the thermosetting start temperature by the cooling means provided in the vicinity of the resin supply port to the second cavity so as to fill the second cavity. Configured.
(Function) The thermosetting resin injected into the mold cavity starts to harden by heat transfer from the mold, but has a certain thickness and the first cavity for molding the lamp component member body, In the second cavity for forming a surface film having a very thin thickness, the heat transfer rate to the thermosetting resin injected into the cavity is different, and the lamp component main body constituting material injected into the first cavity (thermosetting The coating material (thermosetting resin) injected into the second cavity is faster to cure than the resin) (it is more susceptible to the heat of the mold). For this reason, when the coating material (thermosetting resin) is heated to a certain extent before the heat on the mold side is transferred and injected into the second cavity, curing begins as soon as it is injected into the cavity. Although there is a possibility that smooth injection (filling) into the cavity may be hindered, the thermosetting resin supplied to the second cavity is cooled by a cooling means provided in the vicinity of the resin supply port to the second cavity. The temperature is adjusted to a predetermined temperature sufficiently lower than the thermosetting start temperature. That is, the thermosetting resin supplied to the second cavity is brought to an appropriate temperature (a predetermined temperature sufficiently lower than the thermosetting start temperature) by the cooling means provided in the vicinity of the resin supply port to the second cavity. Adjusted and injected into the second cavity. Therefore, the film constituent material (thermosetting resin) injected into the second cavity is filled in the entire second cavity without reaching the thermosetting start temperature during injection, and then reaches the thermosetting start temperature. Curing begins.

According to a third aspect of the present invention, in the method for forming a surface film of a synthetic resin lamp component member according to the first or second aspect, the thermosetting resin to be filled in the second cavity is a two-component mixed thermosetting resin. The two cavities were mixed in each molding cycle to fill the second cavity.
(Function) Although the thermosetting resin is cured by heat, properties such as the resin curing rate and curing start temperature change with the passage of time (characteristics as a thermosetting resin decrease), and before several weeks have passed. The properties of the thermosetting resin are greatly different from the latter. And since the amount of the thermosetting resin required in the molding cycle is very small compared to the lamp constituent member main body constituent material, the amount of use is large when one-component thermosetting resin is used for both materials. whereas always new is replenished for lamp components main structural material (properties as the thermosetting resin is not lowered), becomes increasingly older order not replenished for low usage coating constituent materials (heat The characteristics as a curable resin are reduced). For this reason, for example, if the manufacture of a lamp component member body integrated with a coating is continued for several weeks, the properties of the coating component material (thermosetting resin) deteriorates, and the quality of the manufactured product (surface coating) Quality).

  However, a two-component mixed thermosetting resin is used as the thermosetting resin to be filled in the second cavity, and the two cavities are mixed and filled in the second cavity for each molding cycle. The film constituent material filled in the film always has the property as a new thermosetting resin, and even if the molding cycle is repeated, that is, even if the production is continued for a long time, the property of the film constituent material is not deteriorated. The quality (surface coating quality) of the manufactured product (the lamp component member body integrated with the coating) is constant.

  As the lamp component member constituting material (thermosetting resin) to be injected into the first cavity, a two-component mixed thermosetting resin may be used, but a new thermosetting resin is always used on the injection machine side. Since it is replenished to guarantee a certain property, a one-component thermosetting resin is preferable because the equipment of the injection machine is simple and inexpensive.

A synthetic resin lamp component according to claim 4, such as a reflector made of fiber reinforced plastic (hereinafter referred to as FRP) or an extension reflector manufactured by the method according to claim 1. Thus, an undercoat film for forming an aluminum vapor deposition film is formed on the surface of the lamp component.
(Operation) The lamp component member body such as the FRP reflector body or extension reflector body, which is a molded product, is excellent in rigidity and heat resistance, but the surface is a rough surface on which minute irregularities are formed. Therefore, it is not preferable in forming an aluminum vapor deposition film. However, since an undercoat film for forming an aluminum vapor deposition film is integrated on the surface, a smooth surface preferable for forming the aluminum vapor deposition film is obtained.

  As is apparent from the above description, according to the method of claim 1, the lamp component member is formed by the molding apparatus including the mold device having a simple structure constituted by the opposed fixed mold and the movable mold. The primary molding and the secondary molding in which the surface coating is integrated with the lamp component can be performed continuously, so that the arrangement space of the molding apparatus is reduced and the synthetic resin lamp configuration in which the surface coating is formed The manufacturing cost of the member is also low.

  In addition, primary molding and secondary molding can be performed continuously, and it is not necessary to change the mold temperature greatly during the molding cycle. It is remarkably shortened and is optimal for mass production of a synthetic resin lamp component having a surface coating.

  According to the second aspect, since the coating material (thermosetting resin) is smoothly injected and filled into the second cavity, the molding cycle is stabilized.

  According to the third aspect of the present invention, the lamp component main body constituting material filled in the first cavity and the film constituting material filled in the second cavity are subjected to the molding cycle, that is, even if the production is performed for a long time. Even if it passes, since the property of the film constituent material is kept constant without changing, it is possible to manufacture a lamp constituent member in which the quality of the surface film is always constant.

  According to the synthetic resin lamp component according to claim 4, the reflector main body or the extension reflector in which the undercoat film having a smooth surface effective in forming the aluminum vapor deposition film is integrated, with excellent rigidity and heat resistance. A lamp component member main body such as a main body is provided.

  Next, embodiments of the present invention will be described based on examples.

  1 to 5 show an embodiment of a method for forming an undercoat film on a reflector for a headlamp. FIG. 1 is a longitudinal sectional view of a reflector body manufactured by the method of the present invention, and FIG. The figure which shows the whole structure of the shaping | molding apparatus for implementing a method, FIG. 3 is sectional drawing which shows the structure of the injection | pouring head provided in the resin injection port in the metal mold | die apparatus which is the principal part of the same shaping | molding apparatus, (a) is FIG. 4 is a cross-sectional view of the injection head closed, FIG. 4B is a cross-sectional view of the injection head open, FIG. 4 is an explanatory view of the molding process using the molding apparatus, and FIG. , (B) is an explanatory diagram of the secondary molding (two-component mixing / injection) process, (c) is an explanatory diagram of the secondary molding (clamping) process, (d) is an explanatory diagram of the mold opening process, and FIG. It is a sequence which shows operation | movement of the shaping | molding apparatus in a shaping | molding cycle.

  In FIG. 1, reference numeral 1 denotes a thermosetting resin (FRP) reflector body constituting a curved synthetic resin reflector which is a component part of a vehicle lamp, and an undercoat film 2 is integrally formed on the front side thereof. And the surface is made into the smooth surface for performing aluminum vapor deposition processing. Reference numeral 3 denotes a gate mark which is a burr remaining on the back side of the molded reflector body 1 and is removed by a subsequent process. In addition, the reflector main body 1 which integrally formed the undercoat film 2 is manufactured by the shaping | molding apparatus 10 shown in FIGS.

  2 and 3, a molding apparatus 10 injection-molds a reflector body 1 that is a primary molded product W1, and further integrally molds an undercoat film 2 on the surface side of the reflector body 1 that is a primary molded product W1 (reflector body). 1) a mold apparatus 20 having a pair of molds 21 and 25, and a mold apparatus 20 (molds 21 and 25). A plunger-type electric injection machine 40 for injecting a thermosetting resin (FRP), which is a reflector body constituent material, into the first cavity C1, and a second cavity C2 in the mold apparatus 20 (molds 21, 25). A plunger type injector 60 for injecting (injecting) thermosetting resin, which is an undercoat film constituent material, and a temperature controller 80 for adjusting the mold temperature of the mold apparatus 20 (molds 21, 25). It has been.

  In FIG. 3, the mold apparatus 20 includes a fixed mold 21 and a movable mold 25 facing left and right, and the movable mold 25 approaches and separates from the fixed mold 21 by a hydraulic mold opening / closing mechanism 28. It is configured to be capable of clamping and opening by sliding in the direction (left and right in FIGS. 2 and 3). As shown in FIG. 3 (a), on the opposite sides of the fixed side mold 21 and the movable side mold 25, molding surfaces that respectively match the outer peripheral surface and inner peripheral surface of the primary molded product W1 (reflector body 1). 22 and 26 are formed, and the molding surfaces 22 and 26 define a first cavity C1 (for example, a gap of 3 mm between the molding surfaces 22 and 26) for molding the primary molded product W1 (the reflector body 1). To do. Further, as shown in FIG. 3B, the molding surface 26 of the movable mold 25 is formed by moving the movable mold 25 slightly with respect to the primary molded product W1 after the primary molding. In cooperation with the product W1 (reflector body 1), a second cavity C2 (for example, a molding surface 22) for integrally molding (secondary molding) the undercoat film 2 into the primary molded product W1 (reflector body 1). A gap between the primary molded products W1 of 0.5 to 1 mm is defined.

  Reference numeral 23 denotes an injection gate that is provided in the fixed mold 21 and opens into the first cavity C1, and is a highly thermosetting resin (FRP) that is a reflector main body material supplied from the injection machine 40. Is injected from the gate 23 into the cavity C1. On the other hand, reference numeral 24 is a resin injection port provided in the fixed mold 21 and opened in the second cavity C2, and is a two-component mixed type heat that is an undercoat film constituting material supplied from the injection machine 60. The curable resin is injected from the resin injection port 24 into the cavity C2. The molds 21 and 25 are preset by a temperature controller 80 (see FIG. 2) at a predetermined temperature (a suitable temperature at which the thermosetting resin filled in the cavities C1 and C2 is cured, for example, 150 ° C.). The thermosetting resin filled in the cavity C1 (second cavity C2) is thermally cured by the heat of the molds 21 and 25, respectively.

  Reference numeral 62 in FIG. 3 denotes an injection head of an injection machine 60 provided at the resin injection port 24 of the fixed mold 21, and the A liquid storage portions 41 a and B in the injection head 62 and the injection machine body 61 (see FIG. 2). A liquid circulation path 65a and a B liquid circulation path 65b extend between the liquid storage portions 41b. The plunger 64 is accommodated in the cylindrical casing 63 of the injection head 62 so as to be slidable in the vertical direction, and straddles between the side wall 63a of the casing 63 and the plunger 64 as shown in FIG. The return paths 65a1 and 65b1 (see FIG. 3B) of the A liquid circulation path 65a and the B liquid circulation path 65b are provided to face each other. Then, when the plunger 64 rises, the folding paths 65a1 and 65b1 that constitute part of the A liquid circulation path 65a and the B liquid circulation path 65b at the lowermost position of the plunger 64 (the position shown in FIG. 3A) As shown in FIG. 3 (b), the A liquid circulation path 65a and the B liquid circulation path 65b are divided, and the forward side of the A liquid circulation path 65a and the B liquid circulation path 65b provided on the side wall 63a. The ports 65a2 and 65b2 are opened in the casing 63, and the return side ports 65a3 and 65b3 of the A liquid circulation path 65a and the B liquid circulation path 65b are respectively closed by the outer peripheral surface of the plunger 64. At this time, in the casing 63, the liquid A and the liquid B respectively supplied from the forward-side ports 65a2 and 65b2 of the liquid A circulation path 65a and the liquid B circulation path 65b are mixed, so that a thermosetting undercoat is provided. It becomes a film constituent material. When the plunger 64 is lowered, the thermosetting resin, which is an undercoat film constituent material pressed from the injection head 62, is injected into the second cavity C2 from the resin injection port 24.

  The thermosetting resin that fills the first cavity C1 is a one-component thermosetting resin (FRP), whereas the thermosetting resin that fills the second cavity C2 is a two-component mixed type. It is a thermosetting resin, and two liquids are mixed in each molding cycle and filled into the second cavity C2, so that even when many molding cycles are repeated, the respective cavities C1 and C2 are filled. The reflector main body 1 in which the quality of the surface coating 2 is always constant can be manufactured by keeping the property of the thermosetting resin constant without changing.

  That is, the thermosetting resin is cured by heat, but the properties such as the resin curing speed and curing start temperature change with time (characteristics of the thermosetting resin decrease), before and after several weeks. The properties of thermosetting resins differ greatly. And since the amount of the thermosetting resin required in the molding cycle is a little undercoat film constituent material compared to the reflector main body constituent material, when one-component thermosetting resin is used for both materials, to always new is replenished (not decrease the properties of the thermosetting resin) for large reflector body constituting material becomes increasingly older order not replenished for low usage undercoat film constituting material ( The characteristic as a thermosetting resin is reduced). For this reason, if the production of the reflector body integrated with the undercoat film is continued for several weeks, the properties of the material constituting the undercoat film may be deteriorated, and the quality of the manufactured product (quality of the surface film) may be deteriorated. .

  However, a two-component (A-liquid, B-liquid) mixed thermosetting resin is used as the thermosetting resin to be filled in the second cavity C2, and the second cavity C2 is mixed by mixing two liquids for each molding cycle. Therefore, the coating material filled in the second cavity C2 always has the properties of a new thermosetting resin, and even if the molding cycle is repeated, that is, even if the production is continued for a long time, the coating composition The properties of the material do not deteriorate, and the quality of the manufactured product (surface coating quality) is constant.

  As the reflector body constituent material (FRP) to be injected into the first cavity C1, a two-component mixed thermosetting resin may be used, but a new thermosetting resin is always replenished on the injection machine 40 side. Since a certain property is assured, a one-component thermosetting resin is preferable because the equipment of the injection machine 40 is simple and inexpensive.

  The casing 63 of the injection head 62 is provided with a cooling device (not shown) so that the thermosetting resin, which is an undercoat film constituent material in the casing 63, is heated to an appropriate temperature (a predetermined value sufficiently lower than the thermosetting start temperature). The thermosetting resin before being injected into the second cavity C2 is not affected by the heat on the molds 21 and 25 side.

  That is, the thermosetting resin injected into the cavities of the molds 21 and 25 starts to be hardened by heat transfer from the molds 21 and 25, but is used for molding a reflector body having a certain thickness (2 to 3 mm). The first cavity C1 and the second cavity C2 for forming a surface coating having a very thin thickness (1 mm) have different heat transfer rates to the thermosetting resin injected into the cavity, and have a certain thickness. The coating material (thermosetting resin) injected into the thin second cavity C2 is faster to cure than the reflector body constituent material (FRP) injected into a certain first cavity C1 (heat). Susceptible to curing). For this reason, if the film constituent material (thermosetting resin) is heated to some extent before the heat on the mold side is transferred and injected into the second cavity C2, it will be cured as soon as it is injected into the cavity C2. In the beginning, there is a possibility that smooth injection (filling) into the cavity C2 may be hindered, but the thermosetting resin supplied to the second cavity C2 is in the vicinity of the resin supply port 24 to the second cavity C2. It is adjusted to a predetermined temperature sufficiently lower than the thermosetting start temperature by a provided cooling device (not shown). That is, the thermosetting resin supplied to the second cavity C2 is adjusted to an appropriate temperature by the cooling device provided near the resin supply port 24 to the second cavity C2, and is injected into the second cavity C2. The Therefore, after the film constituent material (thermosetting resin) injected into the second cavity C2 is filled in the entire second cavity C2 without reaching the thermosetting start temperature in the course of injection, Since the curing starts, the injection / filling of the coating material (thermosetting resin) into the second cavity C2 is smoothly performed and the molding cycle is stabilized.

  Next, a process of forming the reflector main body 1 using the molding apparatus shown in the present embodiment and integrally forming the undercoat film 2 on the reflector main body 1 will be described with reference to FIGS.

  First, the mold apparatus 20 (molds 21 and 25) is held in a mold-clamped state, and the mold temperature of the mold apparatus 20 (molds 21 and 25) is set to 150 ° C. by the temperature controller 80, for example. Then, when it is confirmed that the mold temperature of the mold apparatus 20 (molds 21 and 25) has reached the set temperature (150 ° C.), the injection machine 40 is operated as shown in FIG. A thermosetting resin (FRP) is injected into the first cavity C1 of the clamped molds 21 and 25. For example, by holding the mold apparatus 20 (molds 21 and 25) in a clamped state for 5 to 10 seconds, the entire thermosetting resin (FRP) in the cavity C1 is cured, and the primary molded product W1 (reflector body) 1) is formed.

  Next, as shown in FIG. 4B, the movable mold 25 is moved in the direction of 1 mm away from the primary molded product W1, and the first molded product W1 and the molding surface 26 of the movable mold 25 are moved to the first side. 2 cavity C2 (gap 1 mm), operating the injector 60, raising the plunger 64, supplying and mixing the liquid A and liquid B into the injection head 62, and is an undercoat film constituent material Prepare a thermosetting resin.

  Next, as shown in FIG. 4C, the plunger 64 is lowered, and the thermosetting resin as the undercoat film constituent material is injected and filled into the second cavity C <b> 2 from the resin injection port 24. Then, after filling the thermosetting resin, a mold clamping operation for gradually increasing the mold clamping force of the mold so that the interval between the second cavities C2 is, for example, 1 mm to 0.5 mm is performed for 5 to 10 seconds, for example. The entire thermosetting resin in the cavity C2 is cured, and a secondary molded product W2 is formed by integrally molding the undercoat film 2 having a thickness of 0.5 mm on the primary molded product W1 (reflector body 1). Thereafter, as shown in FIG. 4 (d), the mold apparatus 20 (molds 21 and 25) is opened, and the secondary molded product W2 is released with a protruding pin (not shown).

  In the above-described embodiment, the method of forming the undercoat film 2 for forming the aluminum vapor deposition film on the reflector main body 1 made of FRP has been described. However, the undercoat for forming the aluminum vapor deposition film on the extension reflector main body or the lamp body main body made of FRP has been described. Needless to say, the present invention can be similarly applied to a method of forming a coat film.

It is a longitudinal cross-sectional view of the reflector main body manufactured by the method of this invention. It is a figure which shows the whole structure of the shaping | molding apparatus for implementing this invention method. FIG. 4 is a cross-sectional view showing a configuration of an injection head provided at a resin injection port in a mold apparatus that is a main part of the molding apparatus, where (a) is a cross-sectional view with the injection head closed, and (b) is an opening of the injection head. It is sectional drawing of the state. It is explanatory drawing of the shaping | molding process using the shaping | molding apparatus, (a) is explanatory drawing of a primary shaping | molding process, (b) is explanatory drawing of a secondary shaping | molding (two liquid mixing and injection | pouring) process, (c) is secondary shaping | molding. (Clamping) Process explanatory drawing, (d) is a mold opening process explanatory drawing. It is a sequence which shows operation | movement of the shaping | molding apparatus in a shaping | molding cycle.

Explanation of symbols

W1 Primary molded product W2 Secondary molded product 1 Reflector body 2 which is a lamp component member body Undercoat coating 20 which is a surface coating 20 Mold apparatus 21 Fixed side molds 22 and 26 Molding surface 23 Injection gate 24 Resin injection port 25 Movable side Mold C1 First cavity C2 Second cavity 40 Electric injection machine 60 Injection machine 62 Injection head 65a A liquid circulation path 65b B liquid circulation path 80 Temperature controller

Claims (4)

In the method of forming a surface film of a synthetic resin lamp component member that forms a surface film in a predetermined region of the injection molded synthetic resin lamp component member body,
A first cavity defined by a pair of molds composed of a fixed mold and a movable mold that have been adjusted to a predetermined temperature in advance is filled with a thermosetting resin that is a material constituting the lamp component member body. Then, after the lamp component member main body that is a primary molded product is molded, the movable mold is moved by a predetermined amount with respect to the primary molded product, and the second cavities defined by the thermosetting property that is the coating material. A method for forming a surface film on a synthetic resin lamp component member, comprising filling a resin and molding a secondary molded product in which a film is integrated with a lamp component member body which is the primary molded product.   Of the thermosetting resins that fill the first and second cavities, at least the thermosetting resin that fills the second cavities is heated by cooling means provided near the resin supply port to the second cavities. The method for forming a surface film on a synthetic resin lamp component member according to claim 1 or 2, wherein the second cavity is filled with the temperature adjusted to a predetermined temperature sufficiently lower than the curing start temperature.   The thermosetting resin filled in the second cavity is a two-component mixed thermosetting resin, and the two components are mixed and filled into the second cavity every molding cycle. Item 3. A method for forming a surface film of a synthetic resin lamp component member according to Item 1 or 2.   An undercoat film for forming an aluminum vapor deposition film on a surface of the lamp component member, such as a fiber reinforced plastic reflector or an extension reflector manufactured by the method according to any one of claims 1 to 3. A synthetic resin lamp component member characterized in that is formed.

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