JPH0349732B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for manufacturing toys equipped with joints, and in particular, the present invention relates to an apparatus for manufacturing toys equipped with joints, and in particular, a method for manufacturing dolls including the main components such as the torso, legs, arms, etc., including the joints. The present invention provides a manufacturing device that enables integral molding through a plurality of consecutive molding steps.

``Prior art'' Conventional doll manufacturing equipment molds the doll's body, legs, arms, and other components by molding synthetic resin.
These parts are molded as separate front and rear or left and right parts, and these parts are assembled by screws in a manual assembly process, and then connected rotatably to each other by riveting, etc. By doing so, the required joints were formed.

``Problems to be Solved by the Invention'' However, according to the above-mentioned conventional manufacturing equipment, each component of the doll, such as the body, legs, arms, etc., is molded as separate front and rear or left and right parts. For example, even in the most conservative calculation, the torso has 5 pieces, the legs have 5 x 2 = 10 pieces, and the arms have 4 x 2 = 8 pieces.
A total of 23 molded parts, 8 screws for assembly
8 rivets, etc., to assemble the doll, a total of 39 parts are required, which has the disadvantage of requiring an extremely large number of parts. Molded parts related to molding have the disadvantage that it is difficult to mold them uniformly under specified molding conditions due to shrinkage during molding. Because it is assembled, it is extremely troublesome to assemble, requiring a large number of assembly man-hours, and even if quality control is carried out in each process, there will inevitably be variations in the finished product due to the above-mentioned molding problems, and manufacturing costs will be high. It had drawbacks such as:

"Means for Solving the Problems" The present invention eliminates the manufacturing disadvantages of the conventional manufacturing equipment described above, and involves arranging a plurality of molds at predetermined angles on concentric circles around the rotation axis. At the same time, the required molds are formed at the positions of the corresponding parts for configuring the joints, etc., according to a predetermined molding order in each mold,
In addition, between the core side and the cavity side constituting these molds, a part of the runner of the part to be molded is held in the axial direction of the rotating shaft for transferring it to the mold of the next molding order. A stripper that is slidably and rotatably installed is provided, and a protruding base that slides along the axial direction of the rotating shaft is provided below the core, and the core is inserted into the protruding base to connect with the stripper. At the same time, a protruding pin is provided to push up a part of the molded part.

``Example'' The present invention will be explained with reference to an example shown in the figures below. Figures 6 and 7 show a doll to be manufactured in an example of the present invention, and this doll has main parts including joints. Body part 10, leg part 2 as component parts
0, the arm part 30, and the torso part 10 is connected to a head part 11, a chest part 12, and a waist part 13, which are swingably connected to each other.
Consists of etc.

In the manufacturing process of such a doll, the following will be explained based on the manufacturing process of one leg 20 shown in FIG.
First, in the first molding process, as shown in FIG. 5A, a shaft member 21 is provided with a protruding shaft 21a that is connected to the runner 1a and is attached to the bearing portion 14 of the waist portion 13;
A protruding shaft 22a serving as one member constituting the joint part
A foot portion 22 with Next, in the second molding process,
An intermediate part 25 is connected to the runner 1b, rotatably enveloping the shaft member 21, and has the other protruding shaft 25a; Intermediate parts 26 each having a shaft 26a are insert-molded, and a knee part 27 is formed in the middle thereof, having protruding shafts 27a and 27b serving as one of the members constituting the joint part of the knee part. Next, in the third molding process, as shown in FIG. The supporting bearing side member 29 is integrally molded using an insert.

In this molding process, the molded parts in the second molding process are molded using a molding material that has a lower melting point and a higher shrinkage rate than the molding material used in the first molding process, which precedes it. . In addition, the molded parts in the third molding process that comes after this are molded using a molding material that has a lower melting point and a higher shrinkage rate than the molding material used in the second molding process that takes precedence, By sequentially and continuously performing these molding steps including insert molding, the main components of the plurality of joints, such as the legs 20, are integrally molded.

FIG. 2 is a front view of the main part of the core 2 side of the molding device for performing the series of molding steps described above, and shows the main part of the molding device used in the first molding step located at position x on a concentric circle about the rotating shaft 3. A second mold 1Y used in the second molding step is provided at a position Y rotated by 120 degrees from the same mold 1X, and a second mold 1Y used for the second molding process is provided at a position Z further rotated by 120 degrees from the same mold 1Y. A third mold 1Z used in the third molding step is provided. These molds are formed in accordance with a predetermined molding order at the positions of corresponding parts for forming joints, etc., respectively.

FIG. 1 is an exploded perspective view of the main parts of the above-mentioned molding apparatus, and in the same figure, 1 is the cavity of the mold corresponding to the above-mentioned core 2, and between the cavity 1 and the opposing core 2 there is a structure as described above. As a transfer means for transferring the part to be molded to a mold in the next molding order, a stripper 4 is equipped with the rotary shaft 3 and rotatably and axially movably holding one end of the runner 1a. It is set up. Further, on the back side of the core 2, a protruding base 5 equipped with a protruding pin 5a is provided,
The core 2 and the protrusion base 5 are slidably mounted in the axial direction via a spring 6b along a plurality of guide pins 6a protruding from a press base 6 connected to the press device. Further, the rotating shaft 3 is provided with engaging claws 7 projecting on three sides for rotating the rotating shaft by a predetermined angle, that is, 120°, and the engaging claws 7 are rotatably held on the outside and hydraulically attached to one side. Device 8a
A guide frame 8 with
A half-moon-shaped guide groove 8b is formed to guide the engagement claw 7 when pressed.

"Operation" The operation of each part of the molding process using the above-mentioned molding apparatus will be explained based on FIGS. 3 and 4.
In this case, the core 2 side is in close contact with the cavity 1 side as shown in a of FIG.
a, and by injection molding in the same mold in this state, a part of the part 1c in the previous molding process is integrally formed with the molded part 1d in the later order. Can be insert molded.
Next, the cavity 1 is separated from the core 2 side as shown in FIG. The integral projecting pin 5a is pressed, and the molded parts 1c and 1d are separated from the mold on the core 2 side together with the stripper 4. Next, when the stripper 4 is continuously pressed as shown in d of FIG. 4, the ejection pin 5a is left behind, and the stripper 4 is separated from the ejection pin 5a and becomes rotatable. Next, in the figure e, the hydraulic device 8a is activated and the stripper 4 is rotated by a predetermined angle, that is, 120 degrees, via the operating shaft 9, the engaging claw 7, and the rotating shaft 3. The molded parts 1c and 1d molded with the mold at this position are moved onto the mold of the subsequent process while being held by the same stripper 4, while the new molded parts 1c and 1d molded with the mold at this position are moved onto the mold of the subsequent process. The molded part 1c is sent along with the rotation of the stripper 4 and positioned on the same mold. Next, as shown in f, the pressing device is moved back so that the stripper 4 is positioned on the core 2 side, and is guided and placed on the molded part 1c of the above-mentioned prior process. Thereafter, the state shown in FIG. 3A is reached, and injection molding is performed in the same manner.

By repeating the above operations, molding is continuously performed in each mold. As the stripper 4 rotates, the parts molded in the mold 1X at position x in FIG. The remaining parts are integrally insert-molded while being guided to the mold 1Z at position Z, and are finally taken out as a finished product of the main components including the joints. At the same time, each runner is separated from the molded part by a runner cutting device (not shown).

"Effects of the Invention" Consisting of a molding process in the first order to form one member for configuring the above-mentioned joints, etc., and a molding process in the second order to form the other member to be paired with the same member. By continuously performing a plurality of insert molding processes, the main components such as the torso, legs, and arms of the doll including the joints as in the embodiment can be individually molded. This eliminates the need for molding and assembling many parts one by one as in the conventional type, greatly reducing the number of parts and assembly man-hours, and greatly reducing manufacturing costs.

In particular, a plurality of molds are arranged concentrically around the rotation axis at predetermined angles, and the required molds are formed in each mold according to a predetermined molding order. A part of a runner for parts to be molded at each position by a simple transfer means with a stripper that is slidable and rotatable in the axial direction of the shaft and has two-step movements: vertical movement and rotational movement. The insert mold can be held and accurately transferred to the next mold, which simplifies the molding equipment that continuously performs multiple insert moldings and enables molding with stable operation at all times. It is something to do.

Furthermore, by performing multiple consecutive insert moldings as described above, it is possible to always provide a finished product with stable quality without product variations due to molding defects as in the conventional method.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the main parts of a toy manufacturing apparatus showing an embodiment of the present invention, FIG. 2 is a plan view of the main parts of the molding apparatus, and FIGS. A side view of the main parts of the molding device for explaining the operation,
FIG. 5 is a perspective view for explaining each step of forming the legs of the doll, FIG. 6 is a cutaway front view of the main part of the doll, and FIG. 7 is a cutaway side view of the main part of the doll. In the figure, 1 is a cavity, 2 is a core, 3 is a rotating shaft, 4 is a stripper, 5 is a protruding base, 6 is a pressing base, 7 is an engaging claw, 8 is a guide frame, 9 is an operating shaft, 1X
is the first mold, 1Y is the second mold, 1Z is the third mold, 1a and 1b are the runners, 10 is the body,
20 is a leg, and 30 is an arm.

Claims (1)

[Claims] 1. A plurality of molds are arranged concentrically around the rotation axis at predetermined angles, and each mold has molding molds in accordance with a predetermined molding order.
Required molds are formed at the positions of the corresponding parts for configuring the joints, etc., and between the core side and cavity side of these molds is one of the runners for the parts to be molded. A stripper is installed on the underside of the core to be slidable and rotatable in the axial direction of the rotating shaft for holding and transferring the parts to the mold for the next molding order. A toy manufacturing device characterized in that a protruding base that slides along the axial direction is provided, and a protruding pin is protruded to push up a part of the molded part at the same time as the stripper by inserting a core into the protruding base.