JP3340087B2 - Mold for insert molding of arm member for elastic doll body and method of molding the above arm member using this mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert molding die for embedding a core material in a molded product in a predetermined state.

[0002]

2. Description of the Related Art In general, it is possible to make a doll take a desired pose when an arm member and a leg member of an elastic doll body are held in a bent state, and the realism is improved. The core material is preferably embedded.
In fact, a leg member in which a core material is embedded is also known.

However, in order to mold such a member containing a core material, it is necessary to fix the core material in a floating state in a molding space. In order to fix the core material in this way, either the ends of the core material are fixed to the edges of the molding space, or the intermediate portion of the core material in the molding space is fixed and supported by a thin wire-like support member. There was no other way. However, in the former method, as shown in Japanese Patent Publication No. 3-16875, the core material (aggregate) is cut off at the end of the molded product, so that traces of the removal remain. For this reason, it can be adopted for the leg member (the sole of the foot is hardly visible and can be ignored), but it is not preferable that the core member has a trace of core material removed at the tip of the hand in the arm member. On the other hand, the latter method is not desirable in appearance since the trace of the support member being removed after the molding, although small, remains as a hole in the surface of the molded product.

[0004]

On the other hand, a method of fixing only one end of the core material and leaving the other end free in the molding space is conceivable. However, it is necessary to enlarge the mold itself and fix it with a special jig, etc. is not. Moreover, since the arm members of relatively small-sized dolls such as so-called "Licca-chan dolls" and "Jenny dolls" are thin, if the core material is slightly shaken at the time of molding, as shown in FIG. There is a danger that the molding space 21 will deviate from the center position, and it is easy to expose to the outside, which is dangerous. Therefore, it was considered that the arm member of the doll was not suitable for molding by insert molding.

For this reason, the above-mentioned relatively small doll arm member is generally formed by slash molding.

However, since a cavity is formed inside the arm member in the slash molding, the tactile sensation is different from that of the leg member in which the core material is buried by the insert molding, resulting in an unbalanced, unnatural and uncomfortable feeling.

The present invention solves the above-mentioned problems, and an insert mold for an arm member for an elastic doll body, which can fix only one end of a core material at a predetermined position in a molded product by a simple structure, and a mold for this purpose. An object of the present invention is to provide a method for forming an arm member by using a mold.

[0008]

In order to solve the above problems, a mold for insert molding an arm member for an elastic doll body according to the present invention comprises a fixed mold and a movable mold having the following requirements. It is characterized by being performed. (A) The fixed mold and the movable mold are spaced from each other such that molding spaces corresponding to the shape of the pair of left and right elastic doll body arm members are opposed to portions corresponding to the bases of the arm members. (B) The metal core placed inside the both arm members is
The left and right molding spaces are integrally connected, and a concave groove for fitting a central portion of the metal core material is formed on a mating surface between the left and right molding spaces in the fixed mold and the movable mold.
And it has (c) that the core material and the groove is bent (D) soluble in a portion corresponding to the base of the arm member of the molding space
The gate of the fused resin is formed

The metal core material fitted in the concave groove
Is preferably fixed at least at three points .

It is preferable that a temporary fixing means for temporarily fixing the metal core is formed on the mating surface of the fixed die and the movable die.

Further, it is preferable that a pin material for extruding the molded metal core material is provided on the mating surface of the fixed mold so as to be able to protrude and retract.

Next, a method for forming an arm member using the insert molding die according to the first aspect of the present invention is characterized by the following requirements. (A) A metal core common to both arms is arranged in the two molding spaces of the fixed mold, and both sides of the metal core are extended to both molding spaces. Overlay the movable mold on the fixed mold,
Holding both sides of the metal core material fitted in the concave grooves at the mating surfaces of both molds in a state of being floated in the molding space. (C) Injecting molten synthetic resin from the gate of the molding mold (D) Separating the movable mold after molding and removing the metal core material exposed from the base of both molded arm members.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes an example of a mold for insert molding (hereinafter referred to as a mold) of the present invention, which molds an arm member for an elastic doll body.

The mold 1 comprises a fixed mold 2 and a movable mold 3, and the fixed mold 2 and the movable mold 3 have a pair of left and right molding spaces 4a, 4a, 4b, 4b forming an arm. Are formed symmetrically, and the fixed mold 2 and the movable mold 3 are combined to form an arm by injecting and filling a molten synthetic resin from the injection port 6. The molding space 4a, 4
a, 4b and 4b are formed at intervals so that the portions corresponding to the bases of the arm members face each other.

Next, a substantially V-shaped concave groove 5 is formed in the mating surface between the left and right molding spaces of the fixed mold 2 and the movable mold 3.
a and 5b are formed. These concave grooves 5a, 5b are fixing means for fixing the central fixing portion 10a of the metal core material 10 of the both arm members protruding from the molding spaces 4a, 4b, and have such a size that the core material 10 can be closely fitted. When the movable mold 3 is fitted to the fixed mold 2, the core material 10 positioned on the fixed mold 2 is accommodated in the concave grooves 5 a and 5 b,
The fixed mold 2 and the movable mold 3 are brought into close contact with each other.

The fixed mold 2 has a pair of temporary fixing projections 1 along the concave groove 5a and in the vicinity thereof, with the concave groove 5a interposed therebetween.
1 is formed. These temporary fixing projections 11 are for temporarily fixing a metal core material 10 described later in a state of being fitted into the concave grooves 5a and 5b of the fixing bracket. Movable mold 3
The portion 11a corresponding to the temporary fixing projection 11 is dented.

Further, on the mating surface of the fixed mold 2, a pin material 12 for extruding the metal core material 10 after molding is provided so as to be able to protrude and retract from the concave grooves 5a and 5b.

Reference numeral 13 denotes a sprue portion, 14 denotes a runner portion, and 15 denotes a gate portion.

Next, an embodiment in which an arm member for an elastic doll is formed by the mold having the above configuration will be described. First, a common metal core 10 is placed on the fixed molds 2 on both sides. The core member 10 is made of metal such as iron, and is formed so as to protrude into the molding space 4a on both sides, and the central fixed portion 10a is bent in a V-shape. As shown in FIG. 2, the fixing portion 10a of the core material 10 is inserted from between the temporary fixing protrusions 11 of the fixing mold 2, and is temporarily fixed by fitting into the concave grooves 4a and 4a. As a result, both side portions of the core member 10 are horizontally extended and held at the center positions of the molding spaces 4a, 4a. The length of the core material 10 is set so that the tip of the core material 10 does not approach the inner walls of the molding spaces 4a, 4a very much. The tip 10b of the core 10 may be folded back.

Thereafter, when the movable mold 3 is overlaid on the fixed mold 2, the fixed portion 10 a of the core 10 is brought into close contact with the fixed mold 2 in the concave grooves 4 a and 4 b of the movable mold 3, and Since the fixing portion 10a of the core material 10 is formed in a V shape,
The whole core material 10 does not rotate around the fixing portion 10a. Therefore, the core member 10 is held and fixed in a horizontal state.

In this state, the molten resin is injected from the injection port 6 into the molding spaces 4 and 5. Resin is sprue part 13,
It is injected into the molding spaces 4 and 5 from the gate portion 15 via the runner portion 14, and the insides of the molding spaces 4 and 5 are filled with resin. At this time, resin pressure is applied to the core material 10 from multiple directions, but since the fixing portion 10a is firmly fixed, the core material 10 does not move in the molding space and is held at a predetermined position. . In addition, as a synthetic resin to be injected,
Soft synthetic resins such as elastomers, Everflex and PVC are preferred.

After the filling, the movable mold 3 is separated from the fixed mold 2 by separation, and the core material 10 is extruded by projecting the pin material 12, and at the same time, the molded product is formed as shown in FIG. Then, the arm part a and the arm part b are taken out in a state where they are connected by the core material 10. Then, after taking out, the same figure (b)
It is only necessary to cut and remove an unnecessary central portion (portion exposed from the molded product) of the core material 10 as described above, and separate the arm portions a and b.

All the molded products thus formed are molded in a state where the core material 10 is always embedded in the center of the molded product. Thus, it is possible to produce a molded product with a high yield. Since the core member is buried in the formed arm member, the bent state is maintained and excellent in realism, and the core member is located at the center of the arm member, so that high safety can be secured.

The fixed portion 10a of the core 10 only needs to be supported at at least three points on the mating surface of the fixed mold 2 and the movable mold 3. Therefore, the above-mentioned concave grooves 5a, 5
In the example of b, if at least the positions a and b in the vicinity of the molding spaces 4a and 4b and the center bending position c are formed so as to be in close pressure contact with the core material 10, there is a slight gap in other parts. It doesn't matter.

In this connection, the fixing means are also provided with the concave grooves 5a, 5b.
It is not limited to a groove formed as described above. For example, a structure in which a concave portion is formed on the mating surface of the fixed die and the movable die, and a projection (not shown) that supports the core material at three points may be formed in the concave portion.

In the above-described mold, the molding space is formed for the same shape, but it is not always necessary to have the same shape. The shape of the fixing portion 10a of the core 10 is not limited to the V-shape. It may be U-shaped or W-shaped.

[0027]

According to the first aspect of the present invention, a molding space corresponding to the shape of a pair of left and right elastic doll body arm members is formed in a fixed mold and a movable mold, and one molding space is formed in these two molding spaces. A metal core material is arranged, and the concave formed on the mating surface of the two dies.
Insert the center of the core material into the groove, and
Since the central part is bent, the two molds
Since the core material cannot rotate when it is
The position of the core material in the space is kept constant. In addition,
The synthetic resin is a part of the molding space corresponding to the base of the arm member.
As it flows in from the gate, the molten synthetic resin flows along the core
Since the core material flows, the core material does not move during molding and is held at a predetermined position. Therefore, according to the present invention, it is possible to manufacture a stable quality elastic doll body arm member in which a core material is correctly embedded in a molded product with a simple structure. Moreover, since the arm member is dense and has no cavity, the same tactile sensation as that of the leg member provided with the core material is obtained, and there is no uncomfortable feeling.

According to the invention of claim 2, since the metal core material which is accommodated in the concave grooves are fixed at least three points,
Necessary and sufficient fixing of the core material can be realized.

According to the third aspect of the present invention, the metal core can be temporarily fixed to the fixed mold by the temporary fixing means, so that the movable molds can be efficiently overlapped.

According to the fourth aspect of the present invention, since the molded product is extruded from the molding space together with the metal core, the molded product can be easily taken out.

According to the fifth aspect of the invention, the metal core material can be firmly and securely held and molded in a state of being floated in the molding space using the mold according to the first aspect. Also,
By removing the exposed portion of the core material after molding, a pair of doll body arm members having the features obtained by the invention of claim 1 can be obtained. Further, the cores of the pair of arm members can be formed of one core material, and it is not necessary to fix each of the cores in each molding space, so that production efficiency is improved. Furthermore, since the arm member can be insert-molded together with the leg member, it is possible to eliminate unbalance and unnaturalness of the skin feeling and the tactile sensation of both members.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an insert molding die according to the present invention.

FIG. 2 is a perspective view showing a state where a core material is set in a mold.

FIGS. 3 (a) and 3 (b) are explanatory diagrams of a molded product immediately after being molded by the above-mentioned mold and a molded product in a state where an excess core material is cut off.

FIG. 4 is an explanatory view of a state of a core material in a conventional molded product.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold 2 Fixed mold 3 Movable mold 4a, 4b Molding space 5a, 5b Groove 10 Metal core material 11 Guide part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B29C 45/26-45/38 B29C 33/00-33/76 B29C 39/26-39/34 B29D 31 / 00

Claims (5)

(57) [Claims] 1. A mold for insert molding of an arm member for an elastic doll, comprising a fixed mold and a movable mold having the following requirements. (A) The fixed mold and the movable mold are spaced from each other such that molding spaces corresponding to the shape of the pair of left and right elastic doll body arm members are opposed to portions corresponding to the bases of the arm members. (B) The metal core placed inside the both arm members is
The left and right molding spaces are integrally connected, and a concave groove for fitting a central portion of the metal core material is formed on a mating surface between the left and right molding spaces in the fixed mold and the movable mold.
And it has (c) that the core material and the groove is bent (D) soluble in a portion corresponding to the base of the arm member of the molding space
The gate of the fused resin is formed 2. The insert molding die for an arm member for an elastic doll body according to claim 1, wherein the metal core material fitted in the concave groove is fixed at at least three points. 3. The elastic doll body according to claim 1, wherein temporary fixing means for temporarily fixing the metal core material is formed on a mating surface of the fixed mold and the movable mold. Mold for insert molding of arm members. 4. The elastic doll body arm according to claim 1, wherein a pin material for pushing out a metal core material after molding is provided on the mating surface of the fixed mold so as to be able to protrude and retract. Mold for insert molding of members. 5. The molding of the arm member by the insert molding die for an arm member for an elastic doll body, which uses the insert molding die according to claim 1 and has the following requirements. Method. (A) A metal core common to both arms is arranged in the two molding spaces of the fixed mold, and both sides of the metal core are extended to both molding spaces. Overlay the movable mold on the fixed mold,
Holding both sides of the metal core material fitted in the concave grooves at the mating surfaces of both molds in a state of being floated in the molding space. (C) Injecting molten synthetic resin from the gate of the molding mold (D) Separating the movable mold after molding and removing the metal core material exposed from the base of both molded arm members.