WO2003020490A1 - Moulage par injection et procede de fabrication reposant sur cette technique de moulage - Google Patents

Moulage par injection et procede de fabrication reposant sur cette technique de moulage Download PDF

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Publication number
WO2003020490A1
WO2003020490A1 PCT/JP2001/007512 JP0107512W WO03020490A1 WO 2003020490 A1 WO2003020490 A1 WO 2003020490A1 JP 0107512 W JP0107512 W JP 0107512W WO 03020490 A1 WO03020490 A1 WO 03020490A1
Authority
WO
WIPO (PCT)
Prior art keywords
injection
molded article
primary
housing
molded
Prior art date
Application number
PCT/JP2001/007512
Other languages
English (en)
Japanese (ja)
Inventor
Takao Umezawa
Yousuke Fukasawa
Original Assignee
Oshima Electric Works Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oshima Electric Works Co., Ltd. filed Critical Oshima Electric Works Co., Ltd.
Priority to JP2003524781A priority Critical patent/JPWO2003020490A1/ja
Priority to PCT/JP2001/007512 priority patent/WO2003020490A1/fr
Publication of WO2003020490A1 publication Critical patent/WO2003020490A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/006—Joining parts moulded in separate cavities
    • B29C45/0062—Joined by injection moulding

Definitions

  • the present invention belongs to the technical field of various injection molded articles such as side blinkers to be attached to an automobile body and a method of manufacturing the same.
  • a lamp as an example of this type of injection molded body.
  • a lamp is, for example, a side blinker, a room lamp, a headlamp, a rear combination lamp, and a side window for a door lamp mounted on an automobile body.
  • the side win force is that a lens part and a housing in which a bulb (light bulb) is incorporated are molded as primary products, respectively, and these are abutted and integrally formed.
  • a method of manufacturing such a material it has been conventionally performed to integrate the butted surfaces by ultrasonic fusion (welding).
  • the mounting surface of such side blinkers may not only be flat but also have a curved surface or a corner surface.
  • the abutting surfaces of the primary products are replaced by curved surfaces or corners.
  • it is a plane.
  • the edge of the lens portion 21 is a curved end surface 21a, but the curved end surface 21a is a fusion surface.
  • the present invention has been made in order to solve these problems in view of the above-described circumstances, and after forming a plurality of split primary products by primary injection, these primary products are combined with each other. Abutting, and then, a secondary injection of a resin material to form a non-planar mounting surface on the injection-molded article, in which the next product is integrated and molded as a secondary product; Injection molded article.
  • the butting surfaces of the primary products of the injection molded body can be formed as non-planar mounting surfaces.
  • the present invention provides a method of molding a plurality of split primary products by primary injection, then butting these primary products together, and then injecting the resin material secondarily, thereby integrating the primary products together. And forming a non-planar mounting surface on the injection-molded article, wherein the injection-molded article is molded as a secondary product.
  • a method for producing an injection-molded article characterized in that a butt surface is formed as a non-planar mounting surface.
  • the non-planar butting surface may be characterized by a curved surface or a corner.
  • the injection molded article is formed by the lens and the housing. In this case, it is possible to provide a lamp in which the lens portion is less likely to be blocked by the housing.
  • Figure 1 is a side view of the side turn signal.
  • FIG. 2 is a vertical sectional view of (X) an exploded side blinker, and (Y) is a vertical sectional view of a side winch.
  • FIG. 3 is a cross-sectional view of the side blinker.
  • FIG. 4 is an enlarged partial longitudinal sectional view of a main part of the side blinker.
  • FIG. 5 is a schematic process diagram of a processing process by die slide injection.
  • FIG. 6 is a side view of a side turn signal showing a modification of the second embodiment.
  • FIG. 7 shows the second embodiment, and (X) is a vertical sectional view of the side turn signal disassembled.
  • FIG. 3 (Y) is a longitudinal sectional view of the side blinker.
  • FIG. 8 is a longitudinal sectional view of a conventional side blinker. BEST MODE FOR CARRYING OUT THE INVENTION
  • reference numeral 1 denotes a side win force
  • the side win force 1 has a shape of an ellipse (ellipse) which is long in the front-rear direction and short in the vertical direction when attached to a vehicle, and has a lens portion. 2 and a housing 4 in which a bulb (light bulb) 3 is installed.
  • the lens section 2 and the housing 4 are fixed products as primary products 2 and 4, which are half products as shown in Fig. 5.
  • the movable mold 1 2 After being molded by the movable mold 1 and 2 respectively, the movable mold 1 2 is slid and moved so that the two primary products 2 and 4 abut each other. Thereafter, the resin material 5 is formed on the curved abutting surface 5 as described later. Is molded by a secondary slide injection molding method.
  • the lens part 2 formed by the primary injection molding has a bowl shape, and its opening edge is concavely curved in the front-rear direction in accordance with the shape of the body B of the vehicle body, and Along the concave curved edge, a contact surface portion 2 a facing the housing 4, and a step-like protrusion from the outer peripheral edge of the contact surface portion 2 a toward the housing 4 side.
  • a stepped surface portion 2b is formed, and a second end surface portion 2d is formed sequentially from the leading edge of the stepped surface portion 2b to the outer peripheral surface 2c of the lens portion 2.
  • a taper surface portion 2f which is inclined toward the center toward the bottom of the lens portion in a state following the inner peripheral surface 2e of the lens portion having a bowl shape is further formed.
  • the material forming the lens portion 2 is a translucent resin, for example, a polycarbonate resin or an acrylic resin.
  • a housing 4 formed by primary injection molding has a socket portion 4a to which a bulb (bulb) 3 is attached, and a flange protruding in a flange shape from the outer peripheral edge of the socket portion 4a toward the outer diameter direction.
  • the flange portion 4b is also formed integrally with the portion 4b, and the flange portion 4b is also convexly curved in conformity with the body B shape of the vehicle body.
  • the outer edge of the flange portion 4 has a contact surface portion 4c that contacts the inner half of the contact surface portion 2a, and an outer peripheral end surface of the contact surface portion 4c that is separated from the step surface 2d.
  • the outer end face portion 4d is formed.
  • a fitting projection 4e that fits into the inner hollow surface of the lens portion 2 is formed on the flange portion 4b, and the taper is formed on the outer periphery of the fitting projection 4e.
  • a tapered surface portion 4f is formed so as to be inclined so as to face and contact the surface portion 2f.
  • the material of the housing 4 is a resin having no translucency, for example, an acrylic resin, a polycarbonate resin, or an ABS resin.
  • the side blinker 1 causes the lens part 2 and the housing 4 which are injection-molded as the primary product to abut each other by a die slide to face each other.
  • the housing fitting convex part 4 e becomes the lens part 2.
  • the tapered surface portions 2 f and 4 f face each other by surface contact, and the contact surface portions 2 a and 4 c abut with each other by surface contact.
  • the body of the side blinker 1 is formed by secondary injection of the material 5, but the resin material 5 intersects with the extension surface of the back surface 4 g of the flange portion 4 b and the extension surface of the lens portion outer peripheral surface 2 c Is injected into the band-shaped space formed between the first end face 2a and the outer end face 4d of the housing end side of the first end face 2a, the cross section 2b, and the protruding face. 2 d and the outer side 4 d of the housing side are set so as to be in contact with each other.
  • the lens part 2 and the housing 4, which are the primary products are secondary products.
  • the resin material 5 to be secondarily injected is different in color and material from the lens part 2, but is the same in color and material as the housing 4, polycarbonate, PMMA, PC, ABS , Elastomer and soft acrylic resin.
  • the fixed mold 11 and the movable mold 12 can be either movable or fixed. However, here, when the mold is released after the primary injection (see Fig. 5 (B)).
  • the side where the lens part 2 is left is referred to as a fixed type 11, and the side where the housing 4 is left is referred to as a movable type 12 for convenience.
  • the fixed mold 11 has a convex portion 1 la forming the inner surface side of the housing 4, a convex portion 1 lb forming a space S for secondary injection, and an outer surface of the lens portion 2.
  • the mold rims 11d and 11e which are abutting surfaces, are each curved in a concave shape.
  • the movable mold 12 has an outer surface side of the housing 4 and a concave portion 12 a forming the secondary injection space S, and a convex portion 12 b forming the inner surface side of the lens portion 2 butt.
  • the peripheral edges 12 c and 12 d of the molds are each convexly curved, and thus a curved secondary injection space S is formed along the abutting surface, where the resin material 5 is formed. After the next injection, the side blinker 11 is formed.
  • the side blinker 1 integrally formed as a secondary product includes the lens part 2 and the housing 4 which have been formed as described above in a die slide system.
  • the wood S material 5 is secondarily injected into the butted surface to be integrated, but the butted surface becomes a curved surface along the curved surface of the vehicle body B. Secondary injection is performed on the butted surface to form a single piece.
  • the lens part is curved along the shape of the body B as in the case of the conventional heat-sealing method
  • the housing is inserted deeply into the lens part and the butted surface is straightened.
  • the light from the bulb 3 reaches the end of the lens unit 2 and the visibility is improved.
  • FIGS. 6 and 7 show a second embodiment of the present invention.
  • This is a side blinker that is installed in a state that straddles a part of the corner R formed in the body B of the body.
  • both the lens portion 7 and the housing 8 have abutment surfaces 7a and 8a formed with corner portions 7b and 8b, respectively, and these corner portions 7b and 8b are formed.
  • the resin material 9 is secondarily injected and integrated with the butted portion surface portions 7a and 8a having b.
  • the present invention can also be implemented in this manner. With this configuration, the side win force 6 can be adjusted, the side blinker 6 shaped to match the shape of the corner R of the body B, the butting surface of the lens unit 7 and the housing 8 can be adjusted to the corner of the body B. It can be manufactured according to the shape.
  • the present invention is not limited to a curved shape or a corner shape but may be implemented in various shapes such as a trapezoidal shape, a sawtooth shape, and the like.
  • the injection-molded article is formed integrally by secondary injection in a state in which the primary products are abutted against each other, and in this case, the mounting surface that is not a flat surface is formed.
  • the primary product is curved according to the shape of the finished product as in the case of the conventional heat-sealing method, one primary product is deeply fitted into the other primary product. This eliminates the need to make the butted surfaces straight, for example, if the finished product is a lamp, the light of the bulb will reach the end of the lens, improving visibility.
  • the mating surfaces can be implemented in various shapes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

dans le cas du moulage intégral d'un bloc de clignotant latéral (1) avec injection secondaire d'une partie lentille (2) et moulage primaire d'un boîtier (4), le bloc de clignotant (1) peut se monter sans difficulté sur la face de montage d'un corps (B), même si ladite face de montage est non pas plane, mais incurvée ou coudée. A cette fin, et au moment où la partie lentille (2) et le boîtier (4) sont intégrés par injection secondaire, la partie réalisée par injection secondaire est incurvée de manière à épouser la face courbe du corps (B) et l'on procède à une injection secondaire d'un matériau à base de résine (5) sur la face incurvée pour former le bloc de clignotant latéral (1).
PCT/JP2001/007512 2001-08-30 2001-08-30 Moulage par injection et procede de fabrication reposant sur cette technique de moulage WO2003020490A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2003524781A JPWO2003020490A1 (ja) 2001-08-30 2001-08-30 射出成形体およびその製造方法
PCT/JP2001/007512 WO2003020490A1 (fr) 2001-08-30 2001-08-30 Moulage par injection et procede de fabrication reposant sur cette technique de moulage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2001/007512 WO2003020490A1 (fr) 2001-08-30 2001-08-30 Moulage par injection et procede de fabrication reposant sur cette technique de moulage

Publications (1)

Publication Number Publication Date
WO2003020490A1 true WO2003020490A1 (fr) 2003-03-13

Family

ID=11737680

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/007512 WO2003020490A1 (fr) 2001-08-30 2001-08-30 Moulage par injection et procede de fabrication reposant sur cette technique de moulage

Country Status (2)

Country Link
JP (1) JPWO2003020490A1 (fr)
WO (1) WO2003020490A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008200969A (ja) * 2007-02-20 2008-09-04 Oshima Denki Seisakusho:Kk 射出成形体

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61193815A (ja) * 1985-02-22 1986-08-28 Hisanori Hatsutori 合成樹脂中空成形体の製造方法
JPS6287315A (ja) * 1985-10-15 1987-04-21 Japan Steel Works Ltd:The 中空成形品の成形方法及びそれに用いられる金型
JPH01259801A (ja) * 1988-04-12 1989-10-17 Asahi Corp 射出成形靴及びその製造方法
JPH11162210A (ja) * 1997-11-28 1999-06-18 Inoac Corporation:Kk 車両用ランプ及びその製造方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62131406A (ja) * 1985-12-02 1987-06-13 市光工業株式会社 灯具用カラ−キヤツプ及びその製造方法
JPH11179758A (ja) * 1997-12-24 1999-07-06 Toray Ind Inc 合成樹脂中空成形品およびその製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61193815A (ja) * 1985-02-22 1986-08-28 Hisanori Hatsutori 合成樹脂中空成形体の製造方法
JPS6287315A (ja) * 1985-10-15 1987-04-21 Japan Steel Works Ltd:The 中空成形品の成形方法及びそれに用いられる金型
JPH01259801A (ja) * 1988-04-12 1989-10-17 Asahi Corp 射出成形靴及びその製造方法
JPH11162210A (ja) * 1997-11-28 1999-06-18 Inoac Corporation:Kk 車両用ランプ及びその製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008200969A (ja) * 2007-02-20 2008-09-04 Oshima Denki Seisakusho:Kk 射出成形体

Also Published As

Publication number Publication date
JPWO2003020490A1 (ja) 2004-12-16

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