JP2558048Y2 - Thin container made of soft synthetic resin - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a thin container made of a soft synthetic resin which can be used for various purposes.

[0002]

2. Description of the Related Art A peripheral wall is erected from a peripheral edge of a bottom wall, and an upper end of the peripheral wall is formed.

2. Description of the Related Art A thin container made of a soft synthetic resin in which a peripheral wall is erected from a peripheral edge of a bottom wall and an outward flange is provided at an upper end of the peripheral wall is widely used.

[0003]

The soft thin container is difficult to hold because its peripheral wall is easily deformed. Therefore, an outward flange is provided to reinforce the peripheral wall, and the entire container is integrally formed. In the case of the container, the outward flange is made of the same material as the peripheral wall of the container, so that the reinforcement by the outward flange is insufficient, so that the container must be thinned to the extent that the container is not difficult to hold. . In addition, the outward flange can increase its rigidity by increasing the thickness, but an excessive thickness will impair the appearance of the container, and an appropriate thickness that will not impair the appearance of the container. A sufficient effect cannot be obtained by the conversion.

[0004] In the present invention, a soft thin container is provided at an upper end portion of a peripheral wall thereof.
The above defect is eliminated by insert molding a rigid ring made of a synthetic resin harder than the container.

[0005]

As a first means, an outward flange is provided at the upper end of the peripheral wall 3 of a thin container made of a soft synthetic resin, the peripheral wall rising from the peripheral edge of the bottom wall. Then, insert molding was carried out by exposing the outer periphery of a rigid ring made of a synthetic resin harder than the thin container having a plurality of holding projections 5 attached to the outer peripheral surface.

As a second means, an outward flange is provided at the upper end of the peripheral wall 3 of the thin walled container made of a soft synthetic resin which rises from the peripheral edge of the bottom wall, and a plurality of internal flanges are provided inside the outward flange. A rigid ring 4 made of synthetic resin, which is harder than the thin container described above and has a projection 10 attached thereto and a recess 11 provided on the outer periphery of the upper surface, is provided on the inner wall surface of the ring projection 10, the bottom outer periphery of the recess 11, and the ring. The outer peripheral surface and the respective surfaces of the lower surface of the ring portion excluding the lower surface of the protrusion 10 were exposed and insert-molded.

[0007]

1 is a thin container made of a soft synthetic resin according to the present invention, which is provided with an outward flange at an upper end portion of a peripheral wall 3 rising from a peripheral edge of a bottom wall 2 and into the outward flange. A rigid ring 4 made of a hard synthetic resin is insert-molded.

The rigid ring 4 is formed as shown in FIGS. 1 to 3 so that insert molding is easy.

In the first embodiment shown in FIGS. 1 and 2, FIG.
As shown by B, a plurality of holding projections 5 are provided at equal intervals on the outer peripheral surface of the rigid ring 4. As shown in FIG. 2A, the container of the present embodiment includes a female mold 6, a stopper 7 placed on the female mold, and a male mold 8 fitted to the inner surface of the female mold 6.
During the insert molding, the outer end of the outer peripheral surface of the holding projection 5 is sandwiched by two of the three molds from above and below and from right and left, and soft into the cavity formed by the molds. A molten material for forming a synthetic resin material is injected. At this time, the molten material flows between the left and right side inner ends of the holding projection 5. In addition, the outer end portion of the outer peripheral surface of each of the nipping projections 5 is exposed to the outer surface of the outward flange after molding by the nipping of the nipping projections 5 by the mold.

FIG. 3 shows a rigid ring 4 according to a second embodiment.
Has a plurality of projections 10 provided at equal intervals on the inner peripheral surface, and a concave portion 11 provided on the outer peripheral portion of the upper surface.
The outer peripheral surface of the bottom, the outer peripheral surface of the ring 4, and the lower surface of the ring except for the lower surface of the protrusion 10 are clamped by a mold. During molding, an injection material is filled between the protrusions 10 and the inner peripheral portion of the recess 11, and as shown in FIG. 3A, the ring portion above the recess 11 and the protrusion 10 are embedded in the outward flange. It will be. Further, after the molding, the inner wall surface of the ring projection 10 is formed on the upper inner surface of the peripheral wall 3 and the outer peripheral surface of the bottom of the recess 11, the outer peripheral surface of the ring 4, and the lower surface of the ring portion excluding the lower surface of the projection 10 are formed. Each surface is exposed on the upper outer surface of the peripheral wall.

[0011]

According to the present invention, the thin container 1 made of a soft synthetic resin is used.
The rigid ring 4 made of synthetic resin, which is harder than the container, is insert-molded at the upper end of the peripheral wall 3, so that the ring forms a strong bone at the upper end of the peripheral wall 3. By having the part, even a container which is easily deformed can be used without any trouble.

The rigid ring 4 is provided with a plurality of holding projections 5 on the outer peripheral surface thereof, and the outer ends of the outer surfaces of the holding projections are exposed to the outer surface of the outward flange. When the rigid ring 4 is set in the mold for insert molding, the above-mentioned setting can be performed only by clamping the outer end of the outer peripheral surface of the rigid ring 4 with the mold. Since it can be performed easily and reliably, and the above-described configuration is used, the molten resin material for forming the outward flange flows between the inner ends of the left and right side surfaces of the holding projections 5 during the injection molding of the container. Therefore, irrespective of the fact that the container is made of a soft synthetic resin material, there is no danger that the rigid ring 4 will come off from the outward flange of the container, and the outward flange and the rigid ring 4 can be reliably integrated. I can do it.

In the case of the invention described in claim 2, a rigid ring 4 made of a synthetic resin, which is harder than the container, is insert-molded at the upper end of the peripheral wall 3 of the thin container 1 made of a soft synthetic resin. (3) The skeleton is formed at the upper end, and therefore, even if the container has the upper end of the peripheral wall having the skeleton, the container can be easily used even if it is easily deformed.

The rigid ring 4 is provided with a plurality of projections 10 on the inner surface, a recess 11 on the outer periphery of the upper surface, the inner wall surface of the ring projection 10, the outer periphery of the bottom of the recess 11, Since the outer peripheral surface of the ring and the lower surface of the ring portion excluding the lower surface of the protrusion 10 are exposed, when the rigid ring 4 is set for insert molding in the container forming mold, the exposed portion of the rigid ring 4 is removed. The above-described setting can be performed simply by being clamped by the mold, and thus the above-described insert molding can be easily and reliably performed. Further, since the above-described configuration is employed, the distance between the projecting portions 10 during the injection molding of the container can be improved. In addition, the molten resin material for forming the outward flange flows into the inner peripheral portion of the concave portion 11, so that the rigid ring 4 is detached from the outward flange of the container regardless of whether the container is a soft synthetic resin material. But without any, and its outward flange and the rigid ring 4 securely can be integrated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of the container of the present invention.

FIG. 2A is an enlarged cross-sectional view of a main part of the container in FIG. 1, and FIG. 2B is a perspective view of a part of a ring used for the main part.

FIG. 3A is an enlarged cross section of a main part of a container showing a second embodiment, and FIG. 3B is a perspective view of a part of a ring used for the main part.

[Explanation of symbols]

 1 ... container body 4 ... rigid ring

Claims (2)

(57) [Scope of request for utility model registration] An outer flange is attached to the upper end of a thin wall made of a soft synthetic resin, which rises from a peripheral edge of a bottom wall to an outer peripheral wall, and a plurality of holding projections are provided on an outer peripheral surface of the outer flange. A rigid ring 4 made of synthetic resin, which is provided with a portion 5 and is harder than the thin container, is insert-molded by exposing the outer end of the outer peripheral surface of the holding projection 5 to the outer surface of the outward flange. Thin container made of soft synthetic resin. 2. An outward flange is attached to the upper end of the peripheral wall 3 of the thin container made of a soft synthetic resin which rises the peripheral wall from the peripheral edge of the bottom wall, and a plurality of protrusions 10 are formed on the inner surface of the outward flange. A concave portion 11 is provided around the outer periphery of the upper surface.
A rigid ring 4 made of synthetic resin that is harder than the thin container,
An inner wall surface of the ring projection 10, an outer peripheral surface of a bottom of the recess 11,
A thin container made of a soft synthetic resin, wherein each surface of a ring outer surface except a ring outer surface and a lower surface of a protrusion except a lower surface of a protrusion is exposed and insert molded.