JPH09183445A - Sleeve insert hinge cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge cap which can be produced as one decorated in a simple manner, priced low, and is simple to put together. SOLUTION: This hinge cap 1 consists of a cap body 2 and a lid 3 connected by a hinge 4. The cap body 2 is formed by setting a cylindrical sleeve, which has the same circumferential length as the circumference of the cap body and has flexibility, in a cavity 2 of a mold having a prescribed configuration and by injecting a resin into the cavity 2 so as to be produced by insert molding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge cap in which a cap body and a lid are connected by a hinge, and more particularly to a hinge cap which can easily decorate the peripheral surface of the cap body.

[0002]

2. Description of the Related Art In recent years, containers such as tube containers and flexible containers that are used by pressing the container body and squeezing out the contents have come to be used in the fields of cosmetics and foods.
Along with this, hinge caps have come to be widely used as lids for containers. This hinge cap is formed by connecting a cap body having a take-out port for taking out contents and a lid body that closes the take-out port with a hinge.

Conventionally, in order to decorate the peripheral side surface of such a hinge cap, a printing method is used, or a ring-shaped member of another color is formed in advance according to the shape of the hinge cap, and this is hinged. It was done to attach it to the cap afterwards and decorate it.

[0004]

However, it is often technically difficult to print on a hinge cap which is a three-dimensional object. In addition, even if a member of a different color is fitted, the cost will be high, such as having to match the shape of the hinge cap and use a separate mold for manufacturing, and a separate part assembly process is required. Therefore, there is also a problem that the manufacturing process becomes complicated.

Therefore, an object of the present invention is to provide a hinge cap which can easily manufacture a decorated hinge cap, has a simple assembling process, and is inexpensive.

[0006]

SUMMARY OF THE INVENTION The present invention is a hinge cap in which a cap body and a lid are connected by a hinge, and the cap body has flexibility having the same peripheral length as the peripheral side surface. The above problem has been solved by proposing a sleeve insert hinge cap in which a cylindrical sleeve is fitted into a cavity having a predetermined shape of a mold, and a resin is injected into the cavity to perform insert molding.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side sectional view of a sleeve insert hinge cap (hereinafter referred to as a hinge cap) according to this embodiment, FIG. 2 is a perspective view of the hinge cap, FIG. 3 is an explanatory view showing deformation of a sleeve, and FIGS. [Fig. 7A] is an explanatory view showing a manufacturing process of the hinge cap.

As shown in FIG. 1, the hinge cap 1 is
The cap body 2 and the lid body 3 are connected by a hinge 4, and a sleeve 5 is integrated on the peripheral side surface of the cap body 2. The cap body 2, the lid 3 and the hinge 4 are integrally formed of synthetic resin such as polypropylene.

As shown in FIG. 2, the cap main body 2 has a cubic shape, and when the hinge cap 1 is attached to the upper surface of the container main body (not shown), the internal substance contained in the container main body is taken out. A nozzle (take-out port) 2a for forming is formed. Further, as shown in FIG. 1, a screw 2c is cut on the inner peripheral surface 2b of the cap body 2, and the screw 2c
It is attached to the container body by screwing c.

As shown in FIG. 2, the lid body 3 is a plate body of a square piece that conforms to the shape of the upper surface of the cap body 2, and the inner side 3
The b is recessed and a plug projection 3a is formed in a part thereof. The plug protrusion 3a is fitted into the nozzle 2a of the cap body 2 when the lid 3 is closed. The diameter of the plug protrusion 3a is larger than the diameter of the nozzle 2a, and when press-fitted, both of them engage in friction to maintain the lid 3 in a closed state.

The lid body 3 and the cap body 2 are connected by a plate-shaped hinge 4, and the cap body 2, the lid body 3,
As described above, the hinge 4 is integrally formed of synthetic resin. Then, the lid body 3 is structured to rotate and open and close with the hinge 4 formed thin in a linear shape as a fulcrum. The lid 3 is located at a position symmetrical with the hinge 4, and the pull-up protrusion 3
c is formed, and when the lid 3 is opened at the time of use, the pull-up protrusion 3c can be pulled up with a finger to pull up the plug protrusion 3
The engagement between a and the nozzle 2a can be easily released.

A sleeve 5 is provided on the peripheral side surface of the cap body 2.
Is insert-molded and welded. The sleeve 5 is
The hinge body 1 is formed of a resin material having a different color from that of the cap body 2, and thus the two-color hinge cap 1 is configured.

As the sleeve 5, as shown in FIG. 3 (a), a flexible tube 5X made of synthetic resin such as polypropylene.
Is used. The flexible tube 5X has the same length as the entire length of the peripheral side surface of the cap body 2 described above, and can be deformed as shown in FIG. Flexible tube 5X
It is possible to form a product in which the sleeve 5 is integrated with the peripheral side surface of the cap main body 2 by placing it in the cavity of the mold forming the cap main body 2 and performing insert molding. This manufacturing process will be described below with reference to FIGS. 4 and 5.

As shown in FIG. 4, the mold for manufacturing the hinge cap of this embodiment has a first mold which is separated from the first mold.
Through fourth plates A, B, C, D.

The first plate A has a resin introduction passage A2 formed in its main body A1. The second plate is the main body B
1 and a core B2 incorporated therein, and a resin introducing passage B3 is similarly formed. The main body B1 and the core B2 are respectively formed with a nozzle forming recess B4 of the cap main body and a plug projection forming recess B5 on the lid side.

The third plate C has a body C1 having a cap body forming cavity C2 and a lid body forming cavity C3.
Are formed. As illustrated, the sleeve 5 is inserted into the cavity C2 for molding the cap body. The sleeve 5 has an outer peripheral surface having the same circumferential length as the inner peripheral surface of the cap body forming cavity C2. Therefore, when the sleeve 5 is inserted into the same cavity C2, the cylindrical sleeve 5 is deformed according to the shape of the same cavity C2, and the outer peripheral surface of the sleeve 5 comes into surface contact with the inner peripheral surface of the same cavity C2. .

The fourth plate D comprises a main body D1 and a core D2 incorporated therein. The core D2 is the third
When the plate C and the fourth plate D are combined, they are inserted into the cavity C2 for molding the cap body. A screw groove D3 is spirally cut on the outer peripheral surface of the projecting portion of the core D2 and forms a screw in the cap body when the resin is injected into the cavity. Further, a protrusion D4 is formed on the upper end of the core D2, and when the second plate B is overlaid, the protrusion D4 is inserted into the nozzle forming recess B4 and resin is injected into the cavity. To form.

FIG. 5 shows the first to fourth plates A,
The state where B, C, and D are overlapped is shown. In this state, when a nozzle of an injection molding machine (not shown) is connected to the resin introduction passage A2 of the first plate A to inject the resin, the resin is injected through the resin introduction passage B3 of the second plate B into the third passage. It is introduced into the cavity C2 for molding the cap body of the plate C and the cavity C3 for molding the lid.

The injected resin welds the sleeve 5 arranged in the cavity C2 for molding the cap body. When the resin is cooled and the cap body 2 is formed, the sleeve 5 is integrated with the cap body 2. Further, the injected resin is further applied to the nozzle forming recess B of the second plate B.
4 and the plug projection forming recess B5, and the nozzle 2a and the plug projection 3a are formed in these portions.

In the hinge cap 1 injection-molded as described above, each plate A, B, C, D is divided again and taken out. At this time, the sprue 6 remaining in the resin introducing passages A2 and B2 is removed from the split gap between the first plate A and the second plate B, and the cap body is square and has the screw 2c cut inside. 2 is taken out from the mold by rotating and pulling out the core D2 of the fourth plate D. By repeating the above-described processing operation, the hinge cap 1 can be mass-produced easily and at low cost.

A second embodiment of the present invention will be described with reference to FIG. The hinge cap 11 of this embodiment is the cap body 1
2 and the lid 13 are connected by a mirror hinge 14. The mirror hinge 14 is composed of two simple hinge portions 14a and an L-shaped hinge 14b formed between them, and when the lid 13 is opened, the L-shaped hinge 14b holds its posture and holds the container. The structure is such that the lid body 13 does not close even when tilted. Further, similarly to the first embodiment, when the lid 13 is closed, the plug protrusion 13a is closed.
Then, the nozzle 12a is closed by fitting it into the nozzle 12a.

As shown in the partially enlarged sectional view of the same figure, the cap body 12 is insert-molded by the same manufacturing method as that of the first embodiment so that the sleeve 15 is arranged on the peripheral surface. Unlike the first embodiment, the sleeve 15 has a low height and has a structure that does not interfere with the L-shaped hinge 14b.

A third embodiment of the present invention will be described with reference to FIG. FIG. 3A is a side view of the hinge cap of the third embodiment, and FIG. 2B is a perspective view of the hinge cap. The hinge cap 21 of this embodiment is similar to the first embodiment,
The cap body 22 and the lid 23 are connected by a simple plate hinge 24, and the cap body 22 is formed into a cylindrical shape and insert-molded using a sleeve 25 formed by obliquely cutting a tube.

Further, a fourth embodiment of the present invention will be described with reference to the side view of the hinge cap shown in FIG. As shown in the figure, the hinge cap 31 uses a sleeve 35 whose upper end is cut in a wave shape, and is insert-molded so that the sleeve 35 is located on the peripheral side surface of the cap body 22.

As shown in these third and fourth embodiments, the designs of the hinge caps 21 and 31 can be diversified by variously changing the shapes and colors of the sleeves 25 and 35. Such a change in the design of the hinge cap only needs to change the shape and color of the sleeve to be used, and there is no need to change the mold at all, so that a wide variety of products can be manufactured at low cost.

Further, not only the shape and color, but also the hinge cap having various designs can be manufactured by insert molding using the sleeve which has already been printed and decorated. In particular, if a sleeve having a pattern or characters printed on a transparent film is used, the pattern or characters can be easily added to the peripheral side surface of the hinge cap without changing the color of the sleeve portion.

The fifth embodiment of the present invention will be described with reference to FIG. FIG. 1A is a side sectional view of the hinge cap of this embodiment, and FIG. 1B is a perspective view of the hinge cap. The hinge cap 41 of this embodiment is the cap body 4
The lid 43 connected to the upper part of 2 and the plate hinge 44 has a disk-like expanded shape, and the sleeve 45 is insert-molded at the lower part of the cap body 42.

As shown in this embodiment, in the hinge cap, not only the shape of the sleeve is different, but the shape of the hinge cap body and the lid body is cubic, cylindrical,
The present invention can be applied to hinge caps of various designs that are modified as in the same embodiment.

The hinge caps 11, 21, 31, 41 of the second to fifth embodiments are also similar to the hinge cap 1 of the first embodiment shown in FIGS. Can be mass produced at cost. Further, in these embodiments, the cap body and the lid body are integrally molded, but the cap body and the lid body may be configured as separate parts.
In this case, if the three-color hinge cap or the sleeve and the lid are made of the same color resin, a striped hinge cap can be formed.

[0030]

As described above, according to the sleeve insert hinge cap of the present invention, since the flexible sleeve having the same peripheral length as the peripheral side surface of the hinge cap is used, the mold for forming the cap body is used. It can be surely fitted into the cavity of. Therefore, it is possible to easily manufacture a hinge cap decorated by insert molding not only when the shape of the cap body is cylindrical, but also when it is other than that. Since the attaching step is not required, the assembling step is simple and the decorated hinge cap can be manufactured at a low price.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a hinge cap according to a first embodiment.

FIG. 2 is a perspective view of a hinge cap of the first embodiment.

FIG. 3 is an explanatory view showing the shape deformation of the sleeve in the first embodiment.

FIG. 4 is a side sectional view of a mold used for manufacturing the hinge cap of the first embodiment (when the mold is divided).

FIG. 5 is a side sectional view of a mold used for manufacturing the hinge cap of the first embodiment (when the mold is fastened).

FIG. 6 is a side view of a hinge cap according to a second embodiment.

FIG. 7 (a) is a side view of the hinge cap of the third embodiment,
(b) is a perspective view of the hinge cap of 3rd Example.

FIG. 8 is a side view of a hinge cap according to a fourth embodiment.

FIG. 9A is a side sectional view of a hinge cap of the fifth embodiment, and FIG. 9B is a perspective view of the hinge cap of the fifth embodiment.

[Explanation of symbols]

1, 11, 21, 31, 41 ... Hinge cap (sleeve insert hinge cap) 2, 12, 22, 32, 42 ... Cap body 3, 13, 23, 33, 43 ... Lid 4, 14, 24, 34, 44 ... Hinge 5, 15, 25, 35, 45 ... Sleeves A, B, C, D ... First, second, third and fourth plates C2 of mold ... Cap body molding cavities

Claims (1)

[Claims] 1. A hinge cap in which a cap body and a lid body are connected by a hinge, wherein the cap body has a flexible cylindrical sleeve having the same peripheral length as the peripheral side surface of the mold body. A sleeve insert hinge cap formed by fitting into a cavity having a predetermined shape, injecting a resin into the cavity and performing insert molding.