JP2007290398A - Method for manufacturing lamp body with reflective face and mold for molding lamp body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To manufacture a lamp body which keeps a reflective face 14 overlaying the inner side face of a lamp main body 3 in manufacturing the lamp body 9 integrally manufactured by providing the lamp main body 3 and a lens part 4 by an injection molding system using a movement of a mold. <P>SOLUTION: A fixed mold 2 is provided with a vacuum depositing apparatus 5, and a reflective face forming step for performing vacuum depositing the reflective face 14 on the inner side face of the lamp main body 3 is provided between a primary injection step for molding the lamp main body 3 and the lens part 4, and a secondary injection step for butting the lamp main body 3 and the lens part 4 and integrating them, to manufacture the lamp body 9 with the reflective face. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention belongs to a technical field of a manufacturing method of a housing such as a front lamp, a blinker (including a side blinker), a tail lamp and the like, and a die for molding the housing mounted on a vehicle or the like.

In general, in this kind of housing, a housing body in which a light source (bulb, bulb, light emitting diode, etc.) is assembled and a lens portion formed of a translucent resin material are abutted and the abutting surface is adhered. A die slide injection method is known as a manufacturing method of such a device (see, for example, Patent Document 1). In this product, the primary product 燈 body and lens part are injection molded with the movable mold and fixed mold facing each other, and then the movable mold is slid to match each primary product. Mold matching is performed, and a resin material is secondarily injected into a butt portion between primary products to integrally mold the casing.
Japanese Examined Patent Publication No. 2-38377

By the way, in some cases, the die slide injection method is used in order to increase the amount of light and to secure a wide irradiation range, by making the inner surface of the main body into a mirror state as a reflecting surface (reflector) However, it has not been proposed to make the inner surface of the cocoon body a reflective surface, so that the primary injection of the cocoon body is once taken out of the mold and the inner surface of the cocoon body is formed as a reflective surface such as vacuum deposition or sputtering. After forming the reflecting surface by using the technique, it is set again on the mold and the butt portion of the primary product is secondarily injected to unify the eyelid body and the lens portion.
Today, however, the lens cut surface has been reduced in the lens part, and the inner surface (reflective surface) of the heel body has been well-understood. In particular, the reflective surface has fingerprints and scratches. In this case, since these can be seen from the outside through the lens part, it becomes a defective product, and therefore it is necessary to be careful in handling the body body after forming the reflecting surface, so that the workability is poor and the yield is low. There is a problem to be solved by the present invention.

The present invention has been created in view of the above-described circumstances and has been created for the purpose of solving these problems. The invention of claim 1 is such that the movement along the fixed mold and the surface direction is performed. A primary injection process for injection molding the main body and lens part, and a fixed mold formed as a concave mold surface, and inside it contains a vacuum evaporation device for vacuum evaporation. And the lens body and the lens part formed in the primary injection step are supported by the movable mold and the lens part by the fixed mold, respectively. The movable mold is moved along the surface direction, and the molds are abutted against each other so as to face the reflecting surface forming means provided on the fixed mold side with the heel body supported by the movable mold, and the reflecting surface Reflective surface formation that forms a reflective surface on the inner surface of the bag body with the forming means The mold is so moved that the movable mold is moved along the surface direction, and the main body formed with the reflective surface supported by the fixed mold is opposed to the lens unit supported by the movable mold. A secondary injection process in which the butt body and the lens unit are integrated by secondarily injecting the butt surface of the heel body and the lens unit that are brought into contact with each other as a result of matching the comrades. This is a method for manufacturing a casing having a reflecting surface.
According to a second aspect of the present invention, there is provided a method for manufacturing a casing having a reflecting surface according to the first aspect, wherein the main casing and the lens section are formed of different resin materials.
The invention of claim 3 is used in an injection molding machine for manufacturing a casing, and after molding a collar body and a lens part separately by primary injection and forming a reflective surface on the collar body, these are formed by secondary injection. A mold for a casing for connecting and integrating a butting portion with a collar body and a lens part, and the mold forms a concave mold surface that forms an outer surface side of the collar body and an inner surface of the lens part. The movable mold having a convex surface, and a fixed mold having a convex surface that forms the inner surface of the collar body and a concave surface that forms the outer surface of the lens unit, and is fixed The mold is formed with a concave mold surface that accommodates a reflecting surface forming means for making the inner surface of the bag main body a reflective surface, and the movable mold moves along the surface direction with respect to the fixed mold. Having a reflective surface, characterized in that it can be formed It is a mold for body shaping.

  By making it invention of Claims 1-3, the housing | casing which has a reflective surface can be easily manufactured using the existing injection molding apparatus.

  Next, embodiments of the present invention will be described with reference to the drawings. In the drawings, 1 is a movable mold (first mold), 2 is a fixed mold (second mold), and the movable mold 1 can be moved away from and in the opposite direction to the fixed mold 2. At the same time, it is configured such that it can move in the direction along the surface (parallel movement) with respect to the fixed mold 2 while being separated from the fixed mold 2. The technique used is omitted because it can be adopted. Since the movement of the mold may be relative, the first mold may be fixed and the second mold may be moved, or of course, both may be moved. . Further, the movement is not limited to the parallel movement in the linear direction as long as the movement is in the direction along the surface, and may be a rotational movement around the axis.

  The movable mold 1 is formed with a concave mold surface 1a for forming the outer surface of the bag main body 3 and a convex mold surface 1b for forming the inner surface of the lens part 4, respectively, while the fixed mold 2 Are formed with a convex surface 2a for forming the inner surface of the bag main body 3 and a concave surface 2b for forming the outer surface of the lens portion 4, respectively, and further accommodates a vacuum deposition apparatus 5 ( The concave surface 2c is formed between the convex surface 2a for forming the inner surface of the bag body 3 and the concave surface 2 for forming the outer surface of the lens portion 4. Is formed. The vacuum vapor deposition apparatus 5 is provided with a publicly known device. As a general outline, an intake passage 6 connected to a vacuum pump P, a boat 7 for containing a metal to be deposited (for example, aluminum or chromium), and the boat 7 are heated. The heater 8 is provided.

  The casing 9 is a side blinker in the present embodiment, and includes a casing main body 3 in which a terminal 10 and a bulb (bulb) 11 are incorporated as necessary parts and formed of a non-translucent resin material. ) It consists of a lens part 4 molded from a resin material, and as will be described later, after molding the heel body 3 and the lens part 4 in the primary injection process, the movable mold 1 is moved to move the heel body 3 and the lens. The casing 9 is formed by abutment with the portion 4 and by integrally injecting the resin material 12 into the butting surface portion.

  Next, the manufacturing method of the housing 9 is demonstrated using drawing. FIG. 2 (A) shows that the mold surfaces 1a and 2a forming the collar body 3 and the mold surfaces 1b and 2b forming the lens part 4 are opposed to each other in a state where the mold surfaces 1 and 2 are separated from each other. Then, the movable mold 1 is moved to the fixed mold 2 side from this separated state, and the opposing mold surfaces are matched (first matching process: see FIG. 2B). In this mold-matching state, primary injection is performed, and the bag main body 3 and the lens portion 4 are respectively injection-molded (primary injection process: see FIG. 2C).

  Thereafter, as shown in FIG. 3 (A), the movable mold 1 moves in a direction away from the fixed mold 2. At this time, the main body 3 is supported on the movable mold 1 side (remaining), The mold is designed so that the lens unit 4 is supported (remains) on the fixed mold 2 side. Next, the movable mold 1 is moved in parallel so that the bag main body 3 faces the vacuum deposition apparatus 5 (see FIG. 3B), and then moves to the fixed mold 2 side to be in a mold matching state (secondary matching). Process: See FIG. 3C). Before the parallel movement, or in the state where the two molds 1 and 2 are separated from each other, a portion where vacuum deposition is not desired, here, the terminal 10 of the main body 3 and the insertion portion 3a of the bulb 11 are covered. In this embodiment, the covering member 13 is incorporated in (inserted into) the main body 3 (covering member assembling step) in the stage before parallel movement. In addition, the concave mold surface 2c that houses the vacuum deposition apparatus 5 is designed so as to cover the butting surface 3b with the lens portion 4 of the bag main body 3 so as not to be vacuum deposited.

  When the mold body 3 and the vacuum vapor deposition apparatus 5 face each other in a mold-matching state, the air in the concave mold surface 2c is extracted from the intake passage 6 to be in a vacuum state, and is supplied to the boat 7 by the heated heater 8. The molten metal is vaporized, and the exposed inner surface of the bag body 3 is vacuum-deposited to form the reflecting surface 14 (reflecting surface forming step: see FIG. 4A). Next, after moving the movable mold 1 away from the fixed mold 2 (see FIG. 4B), the movable mold 1 is moved in parallel with respect to the fixed mold 2 so that the rod body 3 and the lens unit 4 face each other. (See FIG. 4C). Incidentally, before and after moving the movable mold 1 in parallel, a step of removing the covering member 13 and a step of incorporating the necessary terminals 10 and valves 11 can be performed. In this embodiment, the separation before the parallel movement is performed. The removal step and the incorporation step are executed at the step where the movement is finished.

  After that, the movable mold 1 is moved to the fixed mold 2 side to butt the heel body 3 and the lens portion 4 (third-order butting step: see FIG. 5A), and between the heel body 3 and the lens portion 4 Resin material 12 is secondarily injected onto the abutting surface (secondary injection process: see FIG. 5B), whereby the main body 3 and the lens portion 4 are integrated to form a reflective surface 14. 9 Then, the movable mold 1 is separated from the fixed mold 2 and the molded housing 9 is taken out (see FIG. 5C). After that, the movable mold 1 is moved as shown in FIG. The translation is made to the initial position, and this process is repeated thereafter.

  In the embodiment of the present invention configured as described above, when manufacturing the casing 9, the primary injection molding process for forming the casing body 3 and the lens section 4, and the casing body 3 and the lens section 4 are combined. As a result of providing a reflection surface forming step for forming the reflection surface 14 on the inner surface of the bag main body 3 during the secondary injection step for integration, the bag main body once taken out of the mold as in the past As in the conventional case where the reflecting surface is formed on the plate 3 and then set on the mold again, it is not necessary to take out and re-set the bag body 3 in a series of injection molding processes. A reflective surface can be formed on the main body 3 and work efficiency is improved. Moreover, since the bag body 3 is not taken out and re-set, the reflective surface 14 is not touched with a finger to get a fingerprint or hit with an object, and the generation of defective products can be greatly reduced.

In addition, since the concave mold surface 2c in which the vacuum vapor deposition apparatus 5 is accommodated is formed in the second mold 2 that is a fixed mold, the vacuum vapor deposition apparatus 5 is provided on the movable mold 1 side. As a result, there is no problem that the molten metal in the boat 7 spills out.
Furthermore, if a reflective surface is formed with a metal film on the portion where the reflective surface is not desired, that is, the terminal 10 and the mounting portion 3a of the bulb 11 with this material, the insulation is impaired and the circuit is short-circuited. Therefore, since the reflecting surface 14 is formed after the portion is closed with the blocking member 13, the casing 9 is free from problems. Moreover, since the terminal 10 and the valve 11 are assembled after removing the blocking member 13 after forming the reflecting surface 14, all manufacturing operations are smoothly executed in a series of injection molding processes, and the efficiency is improved. A good housing 9 can be manufactured.

Moreover, since the concave mold surface 2c of the vapor deposition apparatus 5 formed on the fixed mold 2 is between the mold surfaces 2a and 2b for forming the bag main body 3 and the lens portion 4, the primary injection process is started. As a result of the moving direction of the movable mold 1 to the reflecting surface forming step and the moving direction of the movable mold 1 from the reflecting surface forming step to the secondary injection step being the same direction, the configuration of the mold moving mechanism is simplified. There is an advantage that you can.

  In addition, this invention is not limited to the said embodiment, Comprising: As a reflective surface formation means, it is not limited to a vacuum evaporation system, For example, the method by a cathode sputtering etc. employ | adopt a normally known reflective surface formation apparatus. be able to. In addition, a terminal or a valve can be retrofitted to the housing.

It is a longitudinal cross-sectional view of a side blinker. (A), (B), and (C) are process schematic diagrams until the primary injection. (A), (B), and (C) are process schematic diagrams up to the secondary matching. (A), (B), and (C) are process schematic diagrams until the bag main body and the lens portion face each other. (A), (B), and (C) are process schematic diagrams until the housing is taken out.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Movable metal mold | die 2 Fixed metal mold | die 2c Concave mold surface 3 燈 main body 4 Lens part 5 Vacuum evaporation apparatus 9 Housing | casing 10 Terminal 11 Valve | bulb 12 Resin material injected secondaryly 13 Cover member 14 Reflecting surface

Claims (3)

A fixed mold and a movable mold configured to be moved along the surface direction;
A primary injection process of injection molding the main body and the lens part;
The fixed mold is formed as a concave mold surface, and is provided with reflecting surface forming means for accommodating a vacuum vapor deposition apparatus for vacuum vapor deposition therein,
The collar body and the lens part molded in the primary injection step are supported along the surface direction with the collar body supported by the movable mold and the lens part supported by the fixed mold. Move the butt body supported by the movable mold so that the molds face each other so as to face the reflecting surface forming means provided on the fixed mold side,
A reflecting surface forming step of forming a reflecting surface on the inner surface of the bag body by the reflecting surface forming means;
The movable mold is moved along the surface direction, and the molds are abutted so that the main body formed with the reflective surface supported by the fixed mold and the lens portion supported by the movable mold face each other. ,
A secondary injection step of integrating the heel body and the lens portion by secondarily injecting the butt surface portion of the heel body and the lens portion that have been brought into contact with each other by matching the molds. The manufacturing method of the housing | casing which has a reflective surface.   The method for manufacturing a casing having a reflecting surface according to claim 1, wherein the casing body and the lens section are formed of different resin materials. Used in injection molding machines for manufacturing housings, forming the main body and lens part separately by primary injection, forming a reflective surface on the main body, and then making secondary contact with these main body and lens part. A mold for a housing for connecting and integrating the butted portions,
The mold is a movable mold in which a concave mold surface that forms the outer surface side of the bag body and a convex mold surface that forms the inner surface of the lens portion are formed;
And a fixed mold on which a convex surface that forms the inner surface of the main body and a concave surface that forms the outer surface of the lens portion are formed.
The fixed mold is formed with a concave surface that accommodates a reflecting surface forming means for making the inner surface of the bag main body a reflecting surface,
The movable mold is formed so as to be movable along a surface direction with respect to the fixed mold. A mold for forming a casing having a reflecting surface.

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