JPH0321419A - Mold for mesh member - Google Patents

Abstract

PURPOSE:To obtain a mesh member where tension of a mesh is uniform, an end of the mesh is not exposed and it is superior in an external appearance, by a method wherein a mating mold surface of a core and cavity is established at a position where they are not introduced into each other. CONSTITUTION:A height of a lower molding space formed by a core 1 and that of an upper molding space formed by a cavity 2 are established almost identical with each other. Both the spaces are established so that a mating mold surface 7 is positioned at the middle of both the spaces. Then also a circumferential groove 8 is formed on a core 1 side and cavity 2 side at an identical height centering around the mating mold surface 7 and a mesh 3 is established so that the mesh 3 is positioned at the center of the circumferential groove 8.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a mesh member in which a mesh (silk thread) is attached to a frame member made of synthetic resin, which is used, for example, as the inner member of a cosmetic container. The present invention relates to a method for shaping a mesh member and an apparatus therefor, in which a frame member made of Hei resin is insert-molded and a mesh is assembled to the frame member at the same time.

[Conventional technology]

Conventionally, as a means of assembling a mesh to a frame member made of resin, when the frame member is insert-molded in a mold consisting of a core and a cavity, a mesh is pre-stretched between the core and the cavity. After letting it happen. By combining the core and cavity to support the mesh, pouring a resin material into the formwork formed by combining the core and cavity, positioning the mesh within this resin material, and solidifying the resin material. The mesh is attached to the frame member. [Problems to be Solved by the Invention] The prior art is shown in FIGS. 3 and 4, and a mesh member formed by the prior art is shown in FIG. 6. FIG. 3 shows the state in which the mesh is stretched and positioned on the core. From this state, the core and cavity come together to form a molding space as shown in Figure 4, but in this prior art. This is because the molding surfaces of the core and cavity intersect with each other to form a molding space. The mesh, which has already been properly tensioned, is further unnecessarily tensioned between the core and the cavity. As a result, the tension of the mesh becomes non-uniform, causing loosening in some parts, and the finished mesh member is likely to be extremely difficult to use.

Also, the mesh formed by this conventional technology is... Fourth
As shown in the figure, the lower edge of the outer periphery of the mesh member, which is a complete product, is exposed. It is extremely difficult to completely remove only this exposed mesh through post-processing due to the material problem of the mesh being flexible. As a result, as shown in FIG. 6, the end of the mesh remains exposed from the lower end of the outer peripheral surface of the mesh member, resulting in an extremely poor appearance.

The present invention was devised in view of these problems, and provides a mold that can mold mesh members with uniform mesh tension, no local slack, and excellent appearance without exposing the edges of the mesh. The challenge is to provide.

[Means for solving espionage]

As a means for this purpose, according to the prior art, a mesh 3 is placed between the core 1 and the cavity 2, and the core 1 forms the upper molding space and the cavity 2 forms the lower molding space. In the mold, a resin material is poured into a molding space 4 to perform insert molding, and a mesh 3 is assembled to a frame member 5 molded from the resin material to mold a mesh member 6, which is a complete product. The present invention is based on the core 1
The mold matching surface 7, which is the reference surface for mold matching with the cavity, is
We decided to set the positions so that they do not interfere with each other. or. On the outer surface of the molding space 4 formed by the core 1 and the cavity, a circumferential groove 8 into which the mesh 3 and the resin material enter is molded along the mold matching surface 7.

[Effect]

The action of the present invention is shown in Figure 1. This will be explained with reference to FIGS. 2 and 5.

FIG. 1 shows a state in which the core 1 and the cavity 2 are separated and the mesh 3 is stretched over the upper surface of the core 1. From this state, as shown in FIG. 2, the core 1 and the cavity 2 are combined to form a molding space 4. At this time,
In the present invention, the core 1 and the cavity 2 are configured so that they do not intersect with each other, that is, the mold mating surfaces 7 of the two do not intersect with each other. There is no further tension due to the combination of the two, and the preset tension level can be maintained. As a result, the entire mesh 3 is tensioned uniformly, and the problem of partial loosening does not occur.

In addition, a circumferential groove 8 is provided in the molding space 4, and the mesh 3 is positioned in the circumferential groove 8 together with the resin material. It is to be cut together with the resin material located in that area. By cutting the mesh 3 together with the resin material, the flexible mesh 3 is cut while being fixed to the hard resin material, so it is ensured that the mesh 3 is cut securely and its ends are exposed from the mold member. Never. The completed mesh member 6 is shown in FIG. As is clear from this figure, the edges of the mesh 3 are only slightly visible at the center of the outer peripheral surface of the frame member 5, and this does not impair the appearance.

〔Example〕

An embodiment of the present invention is shown in FIGS. 1 and 2. This mold is a so-called multi-cavity mold that can mold a plurality of mesh members 6 in one operation. The mesh member 6 formed by this mold has a substantially rectangular shape, as shown in FIG. The height of the lower molding space formed by core 1. The height of the upper molding space formed by the cavity 2 is set to be approximately the same, and the mold matching surface 7 is set to be located between the two spaces.

Further, the circumferential groove 8 is also formed with the same height on the core 1 side and the cavity 2 side with the mold matching surface 7 as the center, so that the mesh 3 is set to be located at the center of the circumferential groove 8. .

When the core 1 and cavity 2 are combined to form the molding space 4 from the state shown in FIG. 1 to the state shown in FIG. Molten resin material is injected from a nozzle (not shown) located on the cavity 2 side, and insert molding is performed. After the resin material is solidified, the core 1 and the cavity 2 are separated again, and the mesh member 6, which is a hollow part, is taken out from the mold. after that. A complete product is obtained by cutting the portion formed by the circumferential groove 8.

〔Effect of the invention〕

In this way, the present invention has a structure in which the mating surfaces of the core and the cavity are not located in mutually intrusive positions, so that when the two are combined, the mesh is not unnecessarily stretched as in the conventional case. It is possible to mold a mesh member in which the mesh is evenly stretched without causing any slack.

In addition, since insert molding is performed by forming a circumferential groove and placing the mesh and resin material in the circumferential groove, after molding, the mesh located in the circumferential groove can be inserted into the part formed by the circumferential groove. By cutting them all together, the edges of the mesh are not exposed from the frame member, and as a result, many excellent effects such as being able to mold a mesh member with an excellent appearance can be achieved.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, and is a sectional view showing a state in which the core and cavity are separated, and FIG. 2 is a sectional view showing a state in which the core and cavity are combined. FIG. 3 shows the prior art, and is a cross-sectional view showing a state in which the core and cavity are separated, and FIG. 4 is a cross-sectional view showing a state in which the two are combined. FIG. 5 is a perspective view showing a mesh member molded according to the present invention, and FIG. 6 is a perspective view showing a mesh member molded according to the prior art. Code explanation 1: Core. 2: Cavity. 3: Me-shie.
4: Molding space, 5: Frame member. 6: Mesh member, 7: Mold matching surface, 8: Circumferential groove. Fang to Zumura

Claims (2)

[Claims] (1) A mesh (3) is placed between the core (1) and the cavity (2), and the core (1) forms a lower molding space and the cavity (2) forms an upper molding space. A resin material is poured into the molding space (4) formed by 2) and insert molded, and the mesh (3) is assembled to a frame member (5) formed of the resin material to form a finished mesh. A mesh member molding die for molding a member (6), wherein the molding surfaces (7) of the core (1) and the cavity are set at positions where they do not invade each other. (2) On the outer surface of the molding space (4) formed by the core (1) and the cavity (2), a circumferential groove (8 ) The mesh member molding die according to claim 1, which is formed by additionally molding.