JPH0780890A - Molding method for insert-embedded synthetic resin products and insert wire-embedded synthetic resin biological model - Google Patents

Abstract

PURPOSE:To allow an insert such as a wire, etc., not to be exposed out of the surface of a molded product by fixing insert retaining members having a plurality of pieces of fine support pins to the insert, permitting the support pins to abut against an inner face of a hollow mold cavity of molds to retain the insert in a free state and injecting a molten resin into the mold cavity. CONSTITUTION:A wire with insert retaining members is prepared, wherein the insert retaining members 10 made of a thermoplastic resin and the like, each of which has two spike-like support pins 12 projected radially from a spherical base portion 11, are provided in a skewering form toward both the ends of the wire 9. For example, when a doll is molded, the wire is inserted into a both-hand portion and a chest portion on a half side 14 of a mold cavity of a pair of molds which mold the doll, and the molds are mated with each other in such a manner that both the ends of the wire 9 are spaced apart at an interval from the mold cavity faces at the tip ends of fingers of both hands. In this case, the wire 9 is put into a state of non-contact with the inner face of the hollow mold cavity by the support pins 12. Thereupon, for example, synthetic rubber is injected into the hollow mold cavity by injection molding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biological model of a person, a bird, a beast, etc. made of synthetic resin (including synthetic rubber) having a wire embedded therein as an insert, and a synthetic resin product having various inserts embedded therein. The present invention relates to a molding method and an insert wire-embedded synthetic resin biological model molded by the molding method.

[0002]

2. Description of the Related Art Conventionally, for example, as a method for molding a synthetic rubber doll in which a plastically deformable wire is embedded in the inner center of the limb so that the limbs of the synthetic rubber doll can bend freely in a desired direction and angle. As shown in FIG. 7, the front and back sides of the front and back sides of a doll with both hands extended to the left and right, for example, on both sides of the pair of dies (M) and (M ') to be joined and separated. To form doll-shaped nest half-faces (C) and (C ') respectively, and wire end-holding grooves (g) (g) and (g') having a semicircular cross section at the tips of both hands on each half-face. (G ') is attached, and both molds (M) and (M') are attached to the holding grooves (g) (g ') and (g) (g') at both ends of the wire (W), respectively. Crossing of both hands and chest in a completely hollow mold nest formed by two mold nest halves (C), (C '), which are held together and held together. At the core position, the wire (W) is held in contact with the inner surface of the mold cavity (free state) except for both ends of the wire, and then molten synthetic rubber is injected into the hollow mold cavity, and both hands and chest A method of molding a doll in which a wire (W) is embedded at the center position of the wire, or an insert holding plate having a wire holding hole is freely movable at the positions of the tips of both hands on the mold cavity half surface (C) of the one mold. After arranging them, both ends of the wire (W) are held in the wire holding holes of the both holding plates, and then the two dies are attached to each other, whereby the wires ( There is known a molding method in which W) is kept in a free state and molten synthetic rubber is injected into the hollow cavity in the same manner as described above.

[0003]

However, in any of the above-mentioned conventional methods, there is a drawback that both ends of the wire (W) project from the tips of both hands of the molded doll. Therefore, the protruding wire tips after molding are cut. After the removal, some sort of repair work such as filling synthetic rubber and covering the tip of the wire was required.

An object of the first invention of the present application is to provide a method for molding an insert-embedded synthetic resin product in which an insert such as a wire is not projected or exposed from the surface of the molded product.

A second object of the present invention is to provide an insert wire-embedded synthetic resin biological model having a good appearance in which the wire does not protrude or be exposed from the surface.

[0006]

In order to achieve the above object, the first invention of the present application is to provide a plurality of pieces protruding from an insert embedding planned position in a hollow cavity of a die to be used toward the inner surface of the hollow cavity. Attach the insert holding member with a thin support pin to the insert,
In the hollow die cavity of the mold, the tip of the supporting pin of the holding member is brought into contact with the inner surface of the hollow die cavity to hold it in a free state, and then the molten synthetic resin is injected into the hollow die cavity for molding. To provide a method for molding insert-embedded synthetic resin products,

According to the second invention of the present application, a plurality of insert holding members projecting a plurality of thin support pins are immovably embedded in the synthetic resin meat by the support pins, and the insert wire is held by the plurality of inserts. Provided is an insert wire-embedded synthetic resin biological model which is held by a member and is embedded at a predetermined position inside the synthetic resin meat.

The above "molten synthetic resin" in the present invention,
“Synthetic resin meat” and “synthetic resin product” are used as terms including molten synthetic rubber, synthetic rubber meat, and synthetic rubber product for convenience respectively. As an example, polyamide-based or silicone-based thermoplastic synthetic resin, Toughprene (trade name of Asahi Kasei Co., Ltd.), Sofprene (the same), isoprene-based, chloroprene-based, butadiene-based, or silicone rubber-based thermoplastic synthetic rubber, etc. Is used selectively.

The "insert holding member" is a thermoplastic synthetic resin such as polystyrene, ABS, polyacetal, etc., and the temperature of the molten synthetic resin and the mold temperature at the time of molding the molten synthetic resin injection. For this reason, the one that can maintain the protruding state of the support pin is selectively used. Hereinafter, an example in which a wire made of synthetic rubber is embedded as an insert will be described with reference to the drawings.

[0010]

EXAMPLES First, a method of forming a wire with an insert holding member will be described. In FIG. 1, a long wire holding groove (2) having the same length as the wire to be used and a semicircular cross section is formed on each of the bonding surfaces of a pair of molds (1) and (1 ′) to be bonded and separated.
(2 ') are formed respectively, and both holding grooves (2),
Holding half-faces (3), (3), (3 '), and (3') of holding member mold nests respectively corresponding to one half surface and the other half surface of the insert holding member at positions near both ends of (2 ') The holding member mold cavity half surfaces (3) and (3 ') are formed in a state of communicating with the grooves (2) and (2') and have a larger diameter than the wire holding grooves (2) and (2 '). And the wire holding grooves (2) and (2 ′) are longitudinally extending through the center of the base type nest half surfaces (4) and (4 ′), and the base type nest half surface (4). ) And (4 '), which are sharp pin-shaped support pin nests (5) and (5') protruding in the radial direction from the center of the hemispherical surface. (6) is a sprue, (7) and (7 ') are half of the runway,
(8) and (8 ') are half faces of the sprue.

A pair of molds (1), (1 ') as described above.
2 with the wire holding grooves (2) and (2 ') holding plastically deformable wire (9) of soft iron, copper, brass, etc. as shown in FIG. 2, and then injection molding. According to the method, the molten polystyrene resin is passed through the sprue (6), the runner half-faces (7) and (7 '), and the sprue half-faces (8) and (8') through the holding member type nest half-face. Molding is performed by injecting into the hollow cavity of the holding member consisting of (3) and (3 '). As shown in FIG. 3 (a), the obtained molded product has two spike-shaped support pins (12) and (12) from the spherical base (11) at positions near both ends of the wire (9). A wire with an insert holding member, wherein insert holding members (10) and (10) radially protruding in a direction orthogonal to (9) are provided in a skewered shape.

If necessary, the insert holding member (10) may be provided with three support pins (12) protruding from each other. As an example, in FIG. 3B, four support pins (12a) ... Are projectingly provided.

Next, the insert holding member (10),
(10) A method of forming a wire-embedded doll using a wire (9) with a wire will be described. As shown in FIG. 4, a pair of doll molding dies (13) and (13 ') to be joined and separated are attached to the joining surfaces of the front and back sides of a wrestler doll with both hands extended to the left and right. One half of a doll-shaped nest (1
4) and (14 ') are formed. (15) is sprue, (16), (16 ') is half of the runway, (17), (1
7 ') is the half of the gate.

The pair of molds (13) and (13 ') are
As shown in FIG. 4, the wire (9) with the insert holding member is inserted into both hands and the chest of the doll type nests (14) and (14 '), and both ends of the wire (9) are inserted into the die nest of both hands. Wires spaced apart from the surface, thereby allowing the wire (9) to be inserted into both hands and the chest of the hollow mold nest consisting of mold nest halves (14), (14 ') as shown in FIG.
Using the support pins (12), (12), (12) and (12) as supports, the entire body including both ends of the wire is placed in a non-contact state (completely free state) with a space between the inner surface of the hollow mold cavity. In this case, a magnet (1
9) is implanted, and the magnetic wire (9) is attached to the magnet (19).
It is also possible to apply suction force to the above so as to maintain the above completely free state. Next, molten synthetic rubber (tuffprene) is injected into the hollow mold cavity through the sprue (15) by an injection molding method. The molten rubber flows into the mold cavity without corners while wrapping around the entire circumference of the wire (9), and the insert holding member (1
Support pins (12) and (12) at the parts (0) and (10)
It will be distributed without any hindrance.

In the rubber doll (18) (FIG. 6) obtained after cooling, the wire (9) is embedded in the rubber flesh at both ends thereof, and is placed substantially at the transverse center of the rubber flesh of both hands and the chest. Since it is held vertically by the insert holding members (10), (10) embedded in the rubber meat of both hands in a fixed state, the wire is also held when the doll's hand is bent and extended in the desired angle and direction. In response to that, bend and stretch to the desired angle,
Displace in the direction.

As another embodiment of the insert wire embedded synthetic resin doll, the insert holding member is formed by changing the wire used in the rubber doll of the above example to have a uniform cross-sectional shape and dimensions and a smooth surface. The wire is held slidably in the longitudinal direction, and the other structure is substantially the same as in FIG. According to this example, when the hand of the doll bends and stretches, the wire bends and stretches while sliding on the insert holding member, so that the tip of the wire does not break through the rubber meat and project outside.

[0017]

According to the method of molding an insert wire-embedded synthetic resin product of the first invention of the present application, an insert-embedded synthetic resin product can be molded without the insert protruding or being exposed from the product surface. The insert wire embedded synthetic resin biological model of the second invention of the present application has a plurality of insert holding members which have a good appearance without the insert wire projecting or being exposed on the model surface and are fixed inside the synthetic resin meat. Since the wire is held, when the wire-embedded portion of the model is bent and stretched in a desired angle and direction, the wire inside can be correspondingly deformed in the desired angle and direction.

[Brief description of drawings]

FIG. 1 is a front view of a pair of molds for forming a wire with an insert holding member.

FIG. 2 is an enlarged cross-sectional view of the joining die taken along the line II-II in FIG.

FIG. 3 (a) is a perspective view of a wire with an insert holding member. (B) It is a perspective view of another example of a wire with an insert holding member.

FIG. 4 is a front view of a pair of molds for forming a doll.

5 is an enlarged cross-sectional view of the bonding die taken along the line VV of FIG.

FIG. 6 is a partially cutaway front view of the molded doll.

FIG. 7 is a front view of a pair of conventional molds for molding a doll.

[Explanation of reference signs] 9,9a Insert wire 10,10a Insert holding member 12,12a Support pin 13,13 'A pair of molds for doll molding 14,14' Doll nest half surface 18 Doll

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Claims (3)

[Claims] 1. An insert holding member having a plurality of thin support pins projecting from an intended position for embedding the insert in a hollow mold cavity of a mold to be used toward the inner surface of the hollow mold cavity is attached to the insert, The insert is held in a free state by bringing the tip of the supporting pin of the holding member into contact with the inner surface of the hollow mold cavity in the hollow mold cavity of the mold, and then the molten synthetic resin is placed in the hollow mold cavity. A method for molding insert-embedded synthetic resin products by injection molding. 2. A plurality of insert holding members projecting a plurality of thin support pins are immovably embedded in the synthetic resin meat by the support pins, and insert wires are held by the plurality of insert holding members. A synthetic resin biological model embedded with insert wire, which is embedded in a predetermined position inside the synthetic resin meat. 3. The insert-wire-embedded synthetic resin biological model according to claim 2, wherein the insert wire is slidably held by the insert holding member in the wire longitudinal direction.