JP3936615B2 - Injection molded body manufacturing apparatus and manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of manufacturing apparatuses and manufacturing methods for various injection molded articles such as side blinkers, head lamps, and tail lamps mounted on a vehicle.
[0002]
[Prior art]
In general, in this type of injection-molded body, for example, there is a side blinker provided so that the direction of the left turn or right turn of the vehicle can be visually recognized from the side of the vehicle body. This will be described as an example. As a conventional side blinker, a lens part and a housing in which a terminal and a bulb (bulb) are incorporated are each formed as a semi-finished product, and then these semi-finished products are assembled in a mold. However, a die slide injection method is known as a manufacturing method for such a product. The details of this are described in, for example, Japanese Examined Patent Publication No. 2-38377. However, when a side winker is molded using this, the lens part and the housing are arranged in a state where the movable mold and the fixed mold are arranged to face each other. After mold molding (primary injection molding) as the first and second semi-finished products (primary injection molding), the movable mold is moved so that both semi-finished products are abutted. The side blinker is molded (secondary injection molding). The injection-molded body molded in this way is extruded by protruding an extrusion member (ejector) from the mold, and is taken out from the mold.
[0003]
[Problems to be solved by the invention]
By the way, it is proposed that when the extruded member is protruded, the extruded member is set to abut against the hollow portion of the injection molded body. However, in such a case, there is a problem that when the extruded member hits when the primary molded semi-finished product is not sufficiently cooled and the strength is not yet obtained, the abutting portion is deformed. In order to avoid this, it is necessary to wait until the semi-finished product is sufficiently cooled and strength is obtained, and then the extruded member must be protruded, resulting in a problem that the work efficiency is lowered and the productivity is poor. There is a challenge.
[0004]
[Means for Solving the Problems]
The present invention was created with the object of solving these problems in view of the above-mentioned circumstances, and the invention of claim 1 is to match the first and second semi-finished products, and An injection molded body manufacturing apparatus is set so that the extruded member is set so as to protrude and abut against the abutting portion of the semi-finished products when the product integrated by injecting the resin material is taken out from the mold by the protrusion of the extruded member. in the second semifinished product is a bowl shape, the butted portion is set to a thickness in a direction abutting the edges of the second semi-finished product is set to protrude from the outer peripheral edge of the abutting portion of the first semi-finished product , the resin material is assumed to be injected into a space portion formed between the first half end surface portion protruding from the product of the abutted portion of the abutted portion outer peripheral end face of the first semi-finished product and a second semi-finished product, extruding Wood, in a state facing the second half first abutting portion direction comprises run-off portions from semifinished products, to abut projects face formed by the said resin material part and the abutting portion of the first semi-finished product It is the manufacturing apparatus of the injection molding body characterized by having performed.
The invention of claim 2 is an injection molded body in which the first and second semi-finished products are butted together and a resin material is injected into the butted portion, and the second semi-finished product has a bowl shape, The abutting portion set to be thick in the abutting direction as the edge of the second semi-finished product is set so as to protrude from the outer peripheral edge of the abutting portion of the first semi-finished product, and the resin material is the abutting portion of the first semi-finished product An extrusion member that is injected into the space formed between the outer peripheral surface portion and the surface portion protruding from the first semi- finished product of the second semi-finished product , and for taking out the injection molded body from the mold , Injection molding characterized by projecting and abutting on a surface part formed by the resin material part and the abutting part of the first semi-finished product in a state facing the abutting part direction including a part protruding from the first semi-finished product It is a manufacturing method of a body.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described. In the drawings, reference numeral 1 denotes a vehicle lamp (side blinker). The lamp 1 includes a lens portion (corresponding to a second semi-finished product of the present invention) 2 having a bowl shape (substantially U-shaped cross section), a terminal 3 and a housing (corresponding to a first semi-finished product of the present invention) 5 in which a bulb (bulb) 4 is incorporated, the lens portion 2 and the housing 5 are molded as a semi-finished product in a primary injection process, It is manufactured by a die slide injection method in which a resin material 8 is secondarily injected and integrated into a butt portion between the molded housing 5 and the lens portion 2.
[0006]
The abutting portion 5a formed as the peripheral portion of the housing 5 has a flange shape, and the inner surface of the abutting portion 2a formed as the peripheral portion of the lens portion 2 abuts on the surface thereof. It is formed as an edge portion of the shape, and is set so as to be thick in the butting direction. Moreover, the abutting portion 2a is set so as to protrude from the housing-side abutting portion 5a, and the protruding end surface portion 2b and the outer peripheral end surface 5b of the housing-side abutting portion 5a are formed as two corner surfaces. The above-described resin material 8 is injected into S.
[0007]
In the drawings, reference numerals 6 and 7 denote movable and fixed molds for die slide injection. The movable mold 6 is formed with a housing mold surface 6 a for forming the inner surface of the housing 5 and an outer surface of the lens portion 2. The lens part mold surface 6b for this purpose is formed. On the other hand, the fixed die 7 is formed with a lens portion mold surface 7 a for forming the inner surface of the lens portion 2 and a housing mold surface 7 b for forming the outer surface of the housing 5. The movable mold 6 moves away from or in contact with the fixed mold 7 (moving in the vertical direction in the drawing), and the housing mold surface 6a faces the lens mold surface 7a and the housing mold surface 7b of the movable mold 6. Although it is possible to move to a position (moving in the left-right direction in the drawing), the specific configuration of the moving mechanism is the same as in the prior art, and the details are omitted.
Further, 9 is a pin-like push-out member (ejector pin) provided so as to protrude and retract with respect to the housing mold surface 7b of the fixed mold 7. The push-out member 9 includes the space S of the housing mold surface 7b. It is arranged in the housing side butting portion 5a.
[0008]
First, in the first step, the mold surfaces 6b and 7a for the lens portion of the movable mold 6 and the fixed mold 7 and the mold surfaces 6a and 7b for the housing face each other, and the resin material is injected first. Then, the lens part 2 and the housing 5 are respectively injection molded (see FIG. 3A). Next, the movable mold 6 moves upward in the drawing so as to be separated from the fixed mold 7 (see FIG. 3B). In this separated state, the housing 5 is set on the fixed mold 7 side, and the lens portion 2 is A pair of terminals 3 and a valve 4 are assembled in the housing 5 and the movable mold 6 moves so that the lens portion 2 and the housing 5 face each other (FIG. 3). (See (C) and (D)). In this state, the mold is matched and the housing 5 and the lens portion 2 are abutted (see FIG. 4A), and the resin material 8 is secondarily injected into the space S formed on the abutting surface (FIG. 4B In this way, the lamp 1 in which the housing 5 and the lens portion 2 are integrated is formed. Thereafter, the movable die 6 is separated from the fixed die 7 and the pushing member 9 protrudes, whereby the hollow lamp 1 is pushed out of the fixed die 7 and removed (FIG. 4 (C), (See (D)).
[0009]
In the embodiment of the present invention configured as described above, the lamp 1 is formed by the series of steps described above. In this case, the pushing member 9 protrudes and the lamp 1 is detached from the fixed mold 7 in the final step. However, the pushing member 9 is not the hollow part of the lamp 1 but the part where the lens part 2 and the housing 5 are abutted protrudes from the back (back) side of the lamp 1 to remove the lamp 1 from the fixed mold 7. In other words, the pushing member 9 has a strength portion that is weak like a hollow portion, and is deformed because the lens portion 2 and the housing 5 are abutted against each other and the thick portion that is solid is projected in the thickness direction. There is no such thing as doing it.
[0010]
In addition, since the pushing member 9 is projected including the resin material 8 portion that is injected to integrate the lens portion 2 and the housing 5, the housing side butting portion 5 a that the pushing member 9 directly contacts is widened and pushed out. There is no need to secure the abutting surface of the member 9.
In addition, in this case, since the lens portion side abutting portion 2a is formed as a rim-shaped edge portion, it is possible to ensure a large thickness in the protruding direction of the extruded member 9, and as a result, it is further strengthened. Since the portion is pierced by the pushing member 9, the pushing member 9 can be removed from the fixed mold 7 without being deformed even if it is not cooled very much.
[Brief description of the drawings]
FIG. 1A is a side view of a lamp, and FIG. 1B is a rear view.
FIG. 2 is a sectional view taken along line XX in FIG.
FIG. 3 is a schematic process diagram showing the first half of the manufacturing process of the lamp.
FIG. 4 is a schematic process diagram showing a latter half process of manufacturing a lamp.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lamp 2 Lens part 5 Housing 6 Movable type 6a Housing mold surface 6b Lens part mold surface 7 Fixed mold 7a Lens part mold surface 7b Housing mold surface 8 Resin material 9 Extruding member

Claims (2)

When the first and second semi-finished products are abutted and a product obtained by injecting a resin material into the abutting portion and integrating it is taken out from the mold by the protrusion of the extruding member, the extruding member is a butt portion of the semi-finished products In the manufacturing apparatus for an injection-molded body that is set so as to protrude and abut against the second semi-finished product , the second semi-finished product has a bowl shape, and the butt portion that is set to be thick in the butt direction as the edge of the second semi-finished product is It is set so that it protrudes from the outer peripheral edge of the butt part of the half-finished product, and the resin material is between the outer peripheral end face of the butt part of the first semi-finished product and the end surface part that protrudes from the first semi-finished product of the butt part of the second semi-finished product. The extruded member is in a state of facing the abutting portion including the portion protruding from the first semi-finished product of the second semi-finished product, and the resin material portion and the first semi-finished product of the second semi-finished product. Match Was part and it has to abut protrudes surface which is formed by injection molding of the manufacturing apparatus according to claim. In the injection molded body that is formed by abutting the first and second semi-finished products and injecting a resin material into the butt portion, the second semi-finished product has a bowl shape, and the edge of the second semi-finished product The abutting part, which is set to be thick in the abutting direction as a part, is set so as to protrude from the outer peripheral edge of the abutting part of the first semi-finished product, and the resin material is the abutting part outer peripheral surface part of the first semi-finished product and the second semi-finished product The extrusion member that was injected into the space formed between the butted part of the first semi-finished product and the surface part protruding from the first semi-finished product protruded from the first semi-finished product of the second semi-finished product. A method for producing an injection-molded article , characterized in that the resin material part and the abutting part of the first semi-finished product protrude and abut against each other in a state of facing the abutting part direction including the part .

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