JPH0131276Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a doll head molding device.

In general, a molding device for producing a doll head made of synthetic resin includes an electroforming mold 10 for molding the head body and a neck hole for engaging the neck of the doll body, as shown in FIG. It is composed of a neck hole forming jig 20 and a neck hole forming jig 20. The neck hole forming jig 20 contacts the inner wall around the screw insertion hole 12 of the electroforming mold 10 from the upper opening 11 of the electroforming mold 10, and is fastened to the electroforming mold 10 by screws 30 inserted through the screw insertion hole 12. are integrally combined. Next, the upper opening 1 of the electroforming mold 10 is
1, a sol-like resin material such as soft vinyl chloride is put in, the lid 13 is closed, and rotation molding is performed while the whole is rotated. As a result, the internal sol-like resin material is uniformly distributed over the inner wall surface, and a desired doll head can be obtained. By the way, neck hole forming jig 2
0 is a contact surface portion 25 in contact with the inner wall 14 of the electroforming mold 10
is formed flat, whereas electroforming mold 1
The bottom inner wall surface 14 of the doll 0 is curved because it constitutes the periphery of the doll's chin. Therefore, when the neck hole forming jig 20 is coupled to the electroforming mold 10, a slight gap is formed between the bottom surface of the neck hole forming jig 20 and the bottom inner wall surface of the electroforming mold 10. For this reason, air may enter from the outside during molding and mix with the sol-like resin material, creating air bubbles in a part of the head body and causing molding defects, or conversely, the sol-like resin inside the electroforming mold. The material comes out through the gap and causes burrs q. Since the burr q must be removed later, the process is troublesome. For this reason, it has been considered to form the bottom inner wall surface of the electroforming mold 10 flat, but in this case, the shape of the chin of the molded doll would be unnatural and the design would be impaired.

It is an object of the present invention to solve the above-mentioned drawbacks, and in particular to propose a doll head molding device that can eliminate molding defects due to air bubbles and post-processing of burrs.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral A indicates a doll head manufacturing apparatus. This manufacturing apparatus A is composed of an electroforming mold 10 and a neck hole forming jig 20. As with the conventional type, the electroforming mold 10 has an upper opening 11 and a screw insertion hole 12.
The upper opening 11 is opened and closed by a lid 13, a screw 30 is inserted from the outside into the screw insertion hole 12, and the neck hole forming jig 20 is fastened.
Further, the outer surface of the doll head to be molded is formed on the inner wall of the electroforming mold 10.

The neck hole forming jig 20 is a pin for forming a neck hole into which a neck (not shown) formed on the doll body is fitted, and a convex portion 22 is provided around the outer periphery of the approximately central portion of the pin body 21. At the same time, a screw receiving hole 23 is formed in the center of the bottom surface, and the bottom surface is formed in a concave shape, and the peripheral end 24 is the contact surface against the electroforming mold, and a V-shaped biting part with a pointed cross section is formed. There is. The neck hole forming jig 20 has an upper opening 11
into the electroforming mold 10 through the screw insertion hole 12.
It is fastened with a screw 30 at a position facing the.

Next, 30 is a screw, and 40 is a spring washer.

When assembling the doll head manufacturing apparatus A, first insert the neck hole forming jig 20 through the upper opening 11 of the electroforming mold 10, and then insert the neck hole forming jig 20 into the screw receiving hole 23 on the bottom of the neck hole forming jig 20. While facing the screw insertion hole 12 of the mold 10, the screw 30 is screwed into the screw receiving hole 23 from the outside of the screw insertion hole 12 and fastened. A spring washer 40 is attached to the screw 30, and the neck hole forming jig 20 is firmly fixed in a predetermined position of the electroforming mold 10. At this time, since a V-shaped biting part 24 with a pointed cross section is formed on the electroforming mold contacting surface at the bottom peripheral end of the neck hole forming jig 20, the biting part 24 can be tightened with the screw 30. It bites into the inner wall 14 of the electroforming mold 10. Therefore, even if the bottom inner wall surface of the electroforming mold 10 is an incomplete concave surface, the peripheral end 24 of the neck hole forming jig 20 bites into this inner wall surface, so that in the conventional type, even the part that is away from the inner wall surface is in close contact. .

In order to manufacture a doll head using the manufacturing apparatus A, as usual, a sol-like synthetic resin material (such as soft vinyl chloride) is inserted into the upper opening 11 of the electroforming mold 10, and the lid 13 is closed. , perform rotation molding. Since the electroforming mold 10 and the neck hole forming jig 20 are in close contact with each other as described above, the sol-like resin material is sealed within the electroforming mold 10, so air cannot enter from the outside, and conversely, it cannot enter the inside. The sol-like resin material will not leak outside.

As explained in detail above, the doll head manufacturing apparatus according to the present invention has a configuration in which a pointed cut-in portion having a V-shaped cross section is formed at the peripheral edge of the bottom surface of the neck hole forming jig. Can be sealed within the electroforming mold. Therefore, in the doll head molded by rotation molding, air bubbles are not generated due to air entering from the outside during molding, which prevents molding defects and improves yield. Since burrs caused by leakage of the sol resin material inside the mold to the outside are also prevented, there is no need for post-processing after molding, improving productivity and reducing costs.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional doll head molding device, FIG. 2 is a sectional view of a doll head molding device according to this invention, and FIG. 3 is a conventional doll head molding device. FIG. 3 is a cross-sectional view of a doll head molded by the apparatus. Code 10...electroforming mold, 11...upper opening, 1
2... Neck hole insertion hole, 13... Lid body, 14... Inner wall, 20... Neck hole forming jig, 24... Biting portion, 30... Screw.

Claims (1)

[Claims for Utility Model Registration] A molding device for a doll head, which is used for rotational molding of a doll head, and is characterized by having the following requirements. (a) A screw insertion hole must be provided in the neck of the mold. (b) A doll neck hole forming jig is disposed in the mold at a position facing the above-mentioned insertion hole, and a sharp mold biting part is provided on the mold contacting surface of the jig. (c) When the screw is fastened to the jig through the screw insertion hole of the mold, the mold biting part of the jig should be able to bite into the inner wall of the mold.