KR20140077564A - Method for Manufacturing Shoes United Heel of Shoes - Google Patents

Abstract

The present invention relates to a method for manufacturing a shoe in which a heel and a sole are formed to be integrated to provide durability for the shoe as well as solidity and classiness. The present invention includes (a) a step for preparing an upper mold, a lower mold, a core material, and a stacked heel leather cover; (b) a step for inserting and fixing a fixing rod, which protrudes downward from one side of the upper mold, to a fixing hole that is formed inside from an upper portion of the core material; (c) a step for fixing the stacked heel leather cover to one side surface in the lower mold and inserting and fixing a plurality of fixing protrusions, which protrude upward from one side of the lower mold, into and to a plurality of fixing holes that are formed inside from a lower portion of the core material; (d) a step for coupling the upper mold and the lower mold with each other and then injecting a synthetic resin for molding; and (e) a step for cooling the upper mold and the lower mold by supplying a coolant into the upper mold and the lower mold, so that the heel of the shoe, which is integrally coupled with the synthetic resin between the core material and the stacked heel leather cover, and the synthetic resin integrally form the sole and a shank. According to the present invention, the sole of the shoe is integrally molded with the heel and thus the manufacturing process can be simplified. Also, the core material is inserted into the heel of the shoe for improved durability. In addition, the stacked heel leather cover is bonded to a surface of the heel for improved appearance. Accordingly, the costs and time associated with shoe manufacturing can be saved and the shoe manufacturing costs can be reduced.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for manufacturing a shoe heel,

The present invention relates to a method of manufacturing a shoe which is integrally formed with a shoe bend, and more particularly, to a shoe making method which is integrally formed with a shoe sole that provides durability to the shoe and provides a firm and luxurious feeling.

Generally, shoes are generally made of natural or artificial leather, and are generally composed of an upper skin surrounding the upper and lower sides of the foot, a floor contacting the ground, and a bend attached to a portion corresponding to the heel of the floor.

Each of these shoes is manufactured by preliminarily preparing a floor window, an upper and a heel which are constituent elements of a shoe, and then using a joining member such as a glue, a thread, or a nail. Therefore, if the manufacturing process of the shoe is complicated and the joining member which combines the components of the shoe is not robust, the shoe is easily lost. In particular, in the case of a shoe heel, the shoe is combined with a bottom shoe and is joined with a nail or glue. However, the shoe heel is easily separated or lost, requiring frequent replacement of the shoe heel.

Patent Document 1 discloses a structure in which a bend 10 is coupled to a bottom plate 24 so that the bend 36 of the bend 32 is engaged with a coupling hole 34 As shown in Fig. Therefore, it is disclosed that a bottom plate, a foot plate, a bending plate, and the like are separately provided and are respectively coupled to each other.

Also, as a conventional technique, Patent Document 2 discloses that the shoe 30 is joined to the sole 25 under the middlesole 21, and the sole is formed by separately joining the heel 27.

Thus, when the shoe is manufactured, the heel and the bottom window are separately manufactured and then combined by post-processing, thereby increasing cost and time for manufacturing the shoe, thereby increasing the manufacturing cost of the shoe.

Korean Utility Model Registration No. 20-0387471 Korean Patent Publication No. 10-2011-0084637

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a durable and beautiful appearance by integrally molding a bottom window and a heel of a shoe by injection molding, The goal is to reduce manufacturing costs.

In order to achieve the above object, the present invention provides a method of manufacturing a shoe, comprising the steps of: (a) preparing an upper mold, a lower mold, a core, and a leather cover, respectively; (b) inserting and fixing a fixing rod protruding downward to one side of the upper mold on the fixing hole formed inward from the upper part of the core material; (c) fixing a red leather cover on one side of the inner surface of the lower mold and inserting and fixing a plurality of fixing protrusions protruding upwardly from one side of the lower mold to a plurality of fixing holes formed inward from the bottom of the core; (d) injecting synthetic resin into the upper and lower molds, respectively, after joining the upper and lower molds, and (e) supplying cooling water into the upper and lower molds to cool the core, And a bottom window and a shank are integrally formed of a synthetic resin and a heel of a shoe in which a synthetic resin is integrally bonded to the synthetic resin.

Further, in the present invention, it is possible to further include a step of waterproofing the imitation leather cover surface with a coating material and a waterproof material before or after molding.

In addition, in the present invention, it may further comprise surface treating said red leather cover surface with paper or waxing or color coating with more than one color.

According to the present invention, in step (d), synthetic resin is injected between the upper mold and the lower mold to inject the insert, and the injection is first pressurized for 7 to 15 seconds, then the injection is stopped for 0.1 to 0.2 seconds, The injection is performed for 5 to 7 seconds and then the injection is stopped for 0.3 to 0.5 seconds and the injection is performed for 3 to 5 seconds while the injection is performed for 3 to 5 seconds. good.

Further, in the present invention, the thickness of the above-mentioned leather cover may be 0.7 to 0.8 mm.

Further, in the present invention, it is possible to further include a step of bonding the topsheet under the backsheet.

According to the present invention, it is possible to simplify the manufacturing process by integrally forming the heel with the bottom window of the shoe, to improve the rigidity by inserting the core material into the heel of the shoe, and to provide a beautiful aesthetic The cost and time for manufacturing shoes can be reduced, thereby reducing the manufacturing cost of shoes.

1 is a perspective view showing an embodiment of the present invention in which a bottom window and a shovel are integrally manufactured.
2 is an exploded perspective view showing a shoe according to the present invention.
3 is a process diagram illustrating a method of manufacturing a shoe-based integrated shoe according to the present invention.
4 is a cross-sectional view illustrating the structure of a mold for manufacturing a shoe-based integrated shoe according to the present invention.
FIG. 5 is a perspective view illustrating a coupling of a topsheet to a backsheet of a shoe manufactured in accordance with the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an oral shoe integrated shoe manufacturing method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the present invention, a method of manufacturing a ladies' shoes is described. Further, it may be preferable to apply to a platform type footwear in which the sole is entirely wide and wide, or the heel is relatively wide and high.

1, the bottom window 10 and the rear heel 4 are integrally formed, and a shank 3 is integrally formed between the bottom window 10 and the rear heel 4. As shown in Fig. A plurality of reinforcing protrusions 2 protrude from the upper surface of the bottom window 10 and the shank 3 at regular intervals. Shank steel of metal is inserted into the shank to reinforce the fragile stiffness of the shank formed between the bottom of the existing shoe and the heel. The reinforcing protrusions 2 include a function capable of replacing such shank steel. A plurality of projections for preventing slipping may be formed on the bottom surface of the bottom window 10. [

In Fig. 2, the core member 5 is joined to the rear sheath 4 in a substantially semicircular shape. The core member 5 is located from the upper end surface of the rear sheath 4 to the inside thereof and has a shape in which the diameter decreases from the top to the bottom as in the outer shape of the heel. The core member 5 may be made of synthetic resin or lumber, but preferably an ABS resin (Acrylonitrile Butadiene Styrene Resin) is applied. ABS resin is easy to process, has high impact resistance and excellent heat resistance. The core member 5 has a first fixing hole 6 formed at the center thereof from the upper end surface to an inner lower portion thereof and a plurality of second fixing holes 7 formed at an inner upper portion from the lower end surface thereof. The first fixing hole 6 is coupled to the fixing rod 11 formed on the upper mold and the second fixing hole 7 is coupled to the fixing protrusion 21 formed on the lower mold. That is, the core member 5 is supported between the upper mold and the lower mold at the time of injection molding. And the second fixing hole 7 includes the function of a fixing hole capable of fixing the top surface in the post-process.

Then, the red leather cover 8 is joined to the surface of the rear leg 4, that is, the surface of the arcuate portion. The leather cover of the enemy is made up of several pieces of pongee, which is about 5mm in thickness, and is rolled up into a hewn shape. The leather is piled up using the various texture of the laminated leather, and the leather is glued, then cut up like a piece of leather It is intended to cover the surface of the heave so that the surface can be seen, so that it can have the same effect as a heel heel.

The thickness of the red leather cover 8 applied in the present invention is approximately 0.7 to 0.8 mm. The surface of the red leather cover (8) is coated with a coating material and a waterproof material. The leather cover (8) may be vulnerable to water, so it is recommended to coat it for waterproofing. TPR (thermoplastic rubber) is applied to the bottom window 10, the shank 3, and the rear sheath 4, but other synthetic resins can be applied. Further, the TPR formed integrally with the bottom window, the shank and the heel has a hardness after molding, that is, hardness or absolute hardness of about 70 to 75 degrees, preferably 72 to 73 degrees.

A method of manufacturing the shoe-integrated shoe according to the present invention will be described with reference to the flow chart of FIG. 3 and FIGS. 4 and 5. FIG.

4, an upper mold 10 and a lower mold 20 capable of integrally molding the shoe bottom window 10, the shank 3, and the rear sheath 4 are prepared for injection molding of the shoes The core member 5, and the red leather cover 8, respectively (S1). The core member 5 is formed in a predetermined shape and shape and a first fixing hole 6 and a second fixing hole 7 are formed on the core member 5 at the upper part and the lower part, respectively. The red leather cover 8 should also be cut to a shape that can be bonded to the surface of the rear leg 4. The enemy leather cover 8 should be positioned closely to one side of the lower mold interior. Further, it is preferable that the red leather cover 8 is formed to be the same as the inner diameter of one side of the inner side of the lower mold 20, so that the red leather cover 8 is contacted tightly tightly to one side of the inner side of the lower mold 20. This is so that the red leather cover 8 is not dented or caught by the hot melt.

The first fixing hole 6 formed in the core 5 is inserted and fixed to the fixing rod 11 protruding from the upper mold 10 (S2). The core member (5) allows the upper portion to be supported by the fixing rod (11) of the upper mold (10). Then, the prepared leather cover 8 is placed on one side of the inner surface of the lower mold 20, that is, on one side of the heel portion, and then fixed (S3). A second fixing hole 7 formed in the core 5 is inserted into a plurality of fixing protrusions 21 protruding from the lower mold 20 and fixed at step S4. In this state, the core member 5 is fixedly supported between the upper mold 10 and the lower mold 20 by the upper mold 10 and the lower mold 20 to be positioned substantially at the center of the heel, Is located on the inner side surface of the lower mold 20 so as to surround the core member 5 at a certain distance from the core member 5. Therefore, a TPR (thermoplastic rubber) which is a melt for forming a heel between the core member 5 and the red leather cover 8 is filled.

When the core member 5 and the red leather cover 8 are fixed and positioned between the upper mold 10 and the lower mold 20, the upper mold 10 and the lower mold 20 are engaged with each other (S5). Then, synthetic resin, that is, melted TPR is injected between the upper mold 10 and the lower mold 20 (S6). The temperature of the molten TPR is injected in a liquefied state at about 200 DEG C or higher. Furthermore, the TPR is injected with the third pressure. That is, the primary pressurization is initially performed for about 7 to 15 seconds (S6-1). Then, it is stopped for about 0.1 to 0.2 seconds before the secondary pressurization (S6-2). At this time, the stopping time after the primary pressurization should not exceed 0.2 seconds minimum. This is because when the molten TPR is pressed for 0.2 sec or more, the red leather cover 8 fixed to the side surface of the lower mold 20 is depressed or curled inward so that the red leather cover 8 is positioned on the surface of the backing In order to prevent such a situation. Further, the secondary pressurization is performed for about 5 to 7 seconds (S6-3). Then, after the secondary pressurization, it is stopped for about 0.3-0.5 seconds (S6-4). In addition, the secondary pressurization and the third pressurization after the stop are performed for about 3 to 5 seconds (S6-5). It is preferable that the primary pressure and the secondary pressure are approximately 110 kg / m 2 or more and the tertiary pressure is approximately 150 to 170 kg / m 2.

When the injection of the TPR is completed between the upper mold 10 and the lower mold 20, the cooling water is supplied to the cooling water passages formed in the upper mold 10 and the lower mold 20, respectively (S7). The cooling water temperature is about 15 ° C and the cooling time is preferably within about 50 to 60 seconds. The bottom window 10 and the shank 3 are integrally formed by the upper mold 10 and the lower mold 20 and the heel 4 formed with the core material 5 and the red leather cover 8 is formed by injection molding do.

Then, the surface of the red leather cover 8 joined to the outer peripheral surface of the rear sheath 4 is waterproofed with a coating material and a waterproof material (S8). The leather of the red leather cover 8 may be weak against water such as water due to the nature of the leather, so that waterproofing is preferable. In addition, the red leather cover 8 can be made to have a rough feel by using the characteristics of the red leather itself or to give a luxurious feeling by processing with paper, waxing or the like. Furthermore, it can be coated with black or brown colors to express various feelings. In addition, the red leather cover 8 can be treated with the coating or the like before molding or after the molding with the mold.

Further, in Fig. 4, the prepared topsheet 9 is joined to the bottom surface of the backsheet 4 and integrated (S9). In addition, in order to form a shoe, a shoe or an upper is combined and finished to complete the manufacture of the shoe.

In this way, the shoe sole, shank, and heel can be integrally manufactured by injection molding, thereby saving the time and cost involved in manufacturing the shoe and expressing the texture of the red leather cover joined to the heel surface. Design can be produced.

While the invention has been shown and described with respect to the specific embodiments 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.

1: bottom window 2: reinforcing projection 3: shank 4: heel 5: core 6, 7: fixing hole 8: red leather cover 9: top plate 10: upper mold 11:

Claims (6)

In a method for manufacturing shoes,
(a) preparing an upper mold, a lower mold, a core member, and a red leather cover, respectively;
(b) inserting and fixing a fixing rod protruding downward to one side of the upper mold on the fixing hole formed inward from the upper part of the core material;
(c) fixing a red leather cover on one side of the inner surface of the lower mold and inserting and fixing a plurality of fixing protrusions protruding upwardly from one side of the lower mold to a plurality of fixing holes formed inward from the bottom of the core;
(d) combining the upper mold and the lower mold with each other at the upper and lower sides, and then injecting and molding synthetic resin; and
(e) supplying cooling water into the upper mold and the lower mold to cool the core, and cooling the water in the upper mold and the lower mold to cool the core and the red leather cover, wherein the synthetic resin is integrally bonded to the core, A method of manufacturing an integral shoe.
The method of claim 1, further comprising waterproofing the imager leather cover surface with a coating material and a waterproof material before or after molding.
3. The method of claim 2, further comprising surface treating the animated leather cover surface with paper or waxing or color coating with one or more colors.
2. The method of claim 1, wherein, in step (d), synthetic resin is injected between the upper mold and the lower mold, injection is performed for 7 to 15 seconds, injection is stopped, The injection is performed for 5 to 7 seconds and then the injections are stopped for 0.3 to 0.5 seconds and the injections are performed for 3 to 5 seconds while the injections are performed with the primary pressurization. A method of manufacturing a heeled shoe.
The method according to claim 1, wherein the thickness of the red leather cover is 0.7 to 0.8 mm.
The method according to claim 1, further comprising the step of bonding a cushion under the heel.

Images