KR20180065308A - Injectection Mold Of Velcro - Google Patents

Abstract

The present invention relates to an injection mold for Velcro. More specifically, a plate-like first core, which has a lower core including a Velcro sheet-shaped core hole and at least one groove in a hook or loop shape, and a second core, from which the groove is not formed while having the same shape as the first core, are arranged and joined alternately with at least one. In addition, it is possible to shorten a process of producing a molded article including a Velcro by comprising a plate core inserted into the core hole and an upper core coupled to the lower core. Since Velcro can be produced by a single injection process, while a Velcro formation part prevents deformation or separation from an injection article main body even with repetitive breakdown of a bond between loops and hooks on the Velcro, thereby simplifying processes.

Description

Injection Mold Of Velcro < RTI ID = 0.0 >

The present invention relates to an injection mold of Velcro, and more particularly, to an injection mold of Velcro which is capable of producing an injection molded product formed on the surface of an injection molded product without separately cutting or adhering the hooked or looped Velcro tape.

Generally, Velcro is a product that has a fixed structure by fitting a pair of fasteners made of hooks and loops, and it is made of nylon fiber and is widely used as a substitute for zipper for clothes and bags, and a hook or loop The fabric tape is formed by cutting to fit the shape to be attached.

Thus, a fabric tape having a hook or loop formed on one side thereof. That is, there is a need for a process of cutting a separate Velcro tape according to the shape to be attached and a process for attaching the same. However, in the process of repeatedly joining and disassembling the hooks and the loops, the adhesive force of the Velcro tape deteriorates and the Velcro tape is separated from the object to which the Velcro tape is attached.

In order to solve this problem, as disclosed in Korean Patent Publication No. 10-1321786 and FIG. 1, there is a method of manufacturing a mold, comprising the steps of: applying a resin in a mold stamped on an inner surface of various patterns, And a hot plate of a hot furnace composed of a hot plate at 380 to 420 ° C. and a hot plate at a temperature of 250 to 300 ° C. and transferring the mold to a thermal kiln, A step of thermosetting the resin, a step of removing the mold from the thermal kiln, silk-screening the adhesive on the back surface of the nonwoven formed fastener, and a step of laminating a velcro fastener having a silk screen printed adhesive on the upper surface thereof A step of adhering the adhesive resin and the elastic fastener to a heated roller press heated to a specific temperature, The method comprising the steps of: rapidly cooling the resin and the Velcro fastener in the mold; and removing the cooled resin and the Velcro fastener from the mold. However, There is a problem that the heat-bonded portion is broken due to the joining and disassembly of the loop.

Further, there is a problem that many processes and equipments are required in order to provide a velcro fastener in an injection-molded product.

Korean Registered Patent No. 10-1321786 (Oct. 18, 2013)

In order to solve the above-mentioned problems, in the present invention, when an injection molding of various shapes is injection-molded, the velcro hook or the loop part is integrally injected at the same time so as to prevent breakage of the hook- And an object of the present invention is to provide an injection mold of Velcro which can mold an injection molded product including Velcro through a meeting injection process.

In order to achieve the object, there is a configuration in which a plate-shaped first core having at least one lower core provided with a velcro sheet-shaped core hole and at least one hook or loop shaped groove, Wherein the missing core is composed of a planar core which is alternately aligned and joined by at least one or more than one, and which is inserted into the core hole, and an upper core coupled with the lower core.

In another aspect of the present invention, the thicknesses of the first and second cores are 0.2 to 0.25 mm, the depth of the groove is 0.33 to 0.43 mm, the width is 0.4 to 0.6 mm, and the gap is 0.8 to 1.0 mm .

According to another aspect of the present invention, there is provided a plate core cover having a thickness of 0.1 to 0.2 mm, which is covered on the above-mentioned plate core and has rectangular holes each having 0.25 mmm and 0.6 mm in each of the grooves.

As described above, the injection mold of the Velcro according to the present invention is integrally formed by integrally injection-molding hooks or loops of the Velcro during the injection molding process of the injection-molded object without cutting or adhering process like Velcro fabric tape. Thereby preventing the formation of the velcro from being separated or deformed from the main body of the injection molded article. Further, since the velcro can be manufactured by one injection process without the need of processing, adhering process or other thermal process, the process can be simplified.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a flow chart of the manufacturing process of a conventional injection-molded velcro manufacturing method.
2 is a front sectional view of a first embodiment of an injection mold of Velcro according to the present invention.
3 is a perspective view of an injection mold plate core of a Velcro according to the present invention.
4 is a front sectional view of a second embodiment of an injection mold of Velcro according to the present invention.
5 is a front view of a hook-shaped hook-and-loop type of a velcro made by injection molding of velcro according to the present invention.
5 is a front view of a loop-shaped top of a velcro made of an injection mold of Velcro according to the present invention.

2 and 3 are perspective views of a first embodiment of an injection mold of Velcro according to the present invention and perspective views of a planar core, respectively, and the detailed construction of the present invention will be described below.

A velcro injection mold comprising a lower core (10) provided with a velcro sheet-shaped core hole (11), and a plate-shaped first core (21) having at least one hook or loop- And a second core 22 in which the groove 21a is missing in the same shape as the first core 21 are alternately aligned and joined to each other by at least one, And an upper core (30) coupled to the upper core (20) and the lower core (10).

The first and second cores 21 and 22 have thicknesses of 0.2 to 0.25 mm, respectively.

4 is a front sectional view of a second embodiment of the injection mold of Velcro according to the present invention, and the construction of the second embodiment of the present invention will be described as follows.

A planar core lid 23 having a thickness of 0.1 to 0.2 mm is provided which is covered on the upper side of the planar core 20 and in which rectangular holes of 0.25 mm and 0.6 mm are formed at the positions of the grooves 21a, . That is, a configuration in which the plate-shaped first core 21 and the second core 22 are in contact with each other is added.

The upper core 30 is provided with means and passages for injecting the molding liquid constituting the injection molding.

5 and 6 are front views of a hook and loop shape of a velcro made of an injection mold of Velcro according to the present invention, and the shape of the groove 21a of the present invention will be described in more detail with reference to FIG.

The groove 21a has a depth of 0.33 to 0.43 mm, a width of 0.4 to 0.6 mm, and a spacing of the groove 21a of 0.8 to 1.0 mm.

This is because, in the case of joining or disassembling the velcro made by the injection mold of the velcro according to the present invention, the fastening force is similar to that of the case of using a general type of velcro tape, Lt; RTI ID = 0.0 > and / or < / RTI >

While the invention has been shown and described with respect to specific embodiments and applications thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone who has it will know it easily.

10. Lower core 11. Core hole
20. Planar core 21. First core
21a. Home 22. Second core
23. Plate core cover 30. Upper core

Claims (5)

In an injection mold of Velcro,
A lower core 10 in which a core hole 11 of a velcro sheet shape is provided;
Shaped first core 21 having at least one hook or loop shaped groove 21a and a second core 22 having a groove 21a missing from the same shape as the first core 21, A planar core 20 which is alternately aligned and joined to at least one of the core holes 11;
And an upper core (30) joined to the lower core (10). The method according to claim 1,
Wherein the first and second cores (21, 22) have a thickness of 0.2 to 0.25 mm, respectively. The method according to claim 1,
The groove (21a) has a depth of 0.33 to 0.43 mm and a width of 0.4 to 0.6 mm. The method according to claim 1,
Wherein an interval between the grooves (21a) is 0.8 to 1.0 mm. The method according to claim 1,
A planar core lid 23 having a thickness of 0.1 to 0.2 mm is provided which is covered on the upper side of the planar core 20 and in which rectangular holes of 0.25 mm and 0.6 mm are formed at the positions of the grooves 21a, Injection mold of Velcro.

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