JPH067745Y2 - Model body composed of multiple synthetic resins - Google Patents

Description

[Detailed Description of the Invention] "Industrial field of application" The present invention relates to a model body integrally formed by connecting a plurality of runners of the same synthetic resin, and is particularly easy to handle after molding. It provides a structure for preventing parts from falling off or being lost during packaging.

"Prior Art" A conventional synthetic resin model body is formed of synthetic resin of the same material, and members of different materials form a mold for each material.

[Problems to be solved by the invention] However, according to the above-described conventional structure, since the mold is configured for each member of different material, not only the mold manufacturing cost is increased, but also the mold is different for each material at the time of molding. Had to be replaced, and had a drawback such as poor work efficiency.

In addition, due to the large number of model bodies after molding, setting mistakes were made during the bag packing work, the thickness of the packaging container was increased, and the model bodies collided during transportation. It had a defect that the member was damaged.

The present invention has been devised in view of this drawback, and has a plurality of runners in which model constituent members made of synthetic resin are grouped by the same synthetic resin, and the end portions of these adjacent runners are inserted into each other. Regarding the model bodies that are connected by molding, in particular, by improving the structure of the connection part of the runner, it is possible to prevent the connection part of the runner from coming off after molding and to prevent the parts from falling off or being lost during packaging. It is intended to provide structure.

"Means for Solving the Problems" As means for solving the above problems, the present invention has a plurality of runners in which synthetic resin model structural members are grouped by the same synthetic resin, and these runners are adjacent to each other. In the model body formed by connecting the ends of the runners to each other by insert molding, the connecting part of the runner is provided with a plurality of protrusions on the side of the end of one member and inclined with respect to the parting line of the runner. Alternatively, a concave portion is formed, and the other end portion is formed so as to hold this end portion.

[Operation] In the above-mentioned configuration, a plurality of runners grouped for each same synthetic resin are arranged in a plane on the molding die. For each runner, the synthetic resin having a high melting point is arranged first. Then, a synthetic resin having a melting point lower than that is injected and integrally molded. Thus, by forming a plurality of protrusions or recesses that are inclined with respect to the parting line at the end of the runner of one model body, and by holding the runner of the other model body at the end of the runner, The connecting portion can be prevented from coming off by the inclined engaging portion with respect to the opening direction of the mold, and the plurality of projections or recesses also prevent the runner from coming off in the longitudinal direction or coming out at a right angle thereto. Can be prevented.

"Example" The present invention will be described with reference to an example shown in the following drawings.
Reference numerals 1 and 2 denote one molding element made of a synthetic resin having a relatively high melting temperature, and the molding elements 1 and 2 have runners 12, 22 respectively having a plurality of model constituent members 11, 21. Have been serialized. Further, 3 and 4 are the other molding elements made of a synthetic resin having a lower melting temperature than this, and each of the molding elements 3 and 4 includes a plurality of model constituent members 31, 41 and a liner 32, respectively. It is connected to 42.

When molding the molded bodies 1 and 2, as shown in FIG. 2A, a plurality of recesses are formed in advance at the end portions A of the runners 12 and 22 as connecting parts, which are slightly inclined with respect to the parting line PL of the runners. 5 is formed, on the other hand, when molding the other molding element 3, 4, the end B of the other runner 32, 42 is integrally formed so as to wrap the end A by insert molding as shown in FIG. To be done.

With the above configuration, the recess 5 of the end A of the runner 12 is formed.
The runner 32 bites in such a way that the end B of the runner 32 holds it, and the runner 32 and the runner 32 are in close contact with each other and integrated,
The mechanical holding force of the connecting portion is enhanced, and the detachment can be prevented in the opening direction of the mold. Further, even when the runner 12 and the runner 32 are pulled in the longitudinal direction, it is possible to prevent the runners from coming off by the engagement of the above-mentioned connecting portions, and also to prevent the pull-outs from being similarly bent at the same time.

Note that the plurality of recesses 5 in the connecting portion of the runner may be formed as protrusions instead of this.

"Effect of the invention" As described above, in the runner connecting portion, a plurality of protrusions or recesses that are inclined to the parting line are formed on the side portion of one end portion, and the other member is held so as to hold this end portion. By molding, the mechanical holding force of the connecting portion of the runner can be enhanced, the connecting portion of the runner can be prevented from coming off after molding, and parts can be prevented from falling off or being lost during packaging.

This allows a series of moldings to be performed by a single molding die without forming a die for each member made of a different material as in the conventional die, and without changing the die for each material when forming. Therefore, the work efficiency can be significantly improved. In addition, since the multiple model bodies after molding are taken out in the form of being connected by the runner, there is no chance of making a setting mistake like the conventional type during bag packing work, and the thickness of the packaging container is reduced. The size can be made smaller, and further, it is possible to prevent the members of the model body from colliding with each other during transportation and being damaged.

[Brief description of drawings]

FIG. 1 is a plan view of a model body showing an embodiment of the present invention, and FIG. 2 is an explanatory view of a molding structure of a connecting portion of the runner. 1,2,3,4 ...... Molded body, 11,21,31,41 …… Model component, 12,22,32,42 …… Runner, 5 …… Concave, A, B
…… End, PL …… Parting line.

Claims (1)

[Scope of utility model registration request] 1. A model element body comprising a plurality of runners in which synthetic resin model constituent members are grouped for each same synthetic resin, and end portions of these adjacent runners are connected to each other by insert molding. , A plurality of protrusions or recesses that are inclined with respect to the parting line of the runner are formed on the side of the end of one member in the connecting portion of the runner, and the other member is held so as to hold this end. A model element body made of a plurality of synthetic resins, characterized by being molded.