KR-102963627-B1 - Shoe manufacturing apparatus and method for smart manufacturing shoe using the same

KR102963627B1KR 102963627 B1KR102963627 B1KR 102963627B1KR-102963627-B1

Abstract

The present invention aims to provide a shoe manufacturing device capable of automating shoe manufacturing by eliminating manual labor by melting a thermoplastic resin on one side of a shoe manufacturing sole and a last during shoe manufacturing and continuously extruding and laminating it in the form of filaments to form an upper, and a smart shoe manufacturing method using the same.

Inventors

김정현
박규열
전상철

Assignees

주식회사 리빌더에이아이

Dates

Publication Date: 20260512
Application Date: 20250429

Claims (8)

A raw material supply unit that supplies a thermoplastic resin having a melt index (MI) of 15 to 30 g/10 min to an extruder; An extruder that melts the thermoplastic resin supplied from the above raw material supply unit and supplies it to a spinneret; A spinning die that continuously discharges molten thermoplastic resin from the above extruder into a filament; An air injection unit configured in a shape that is wider at the top and narrower at the bottom to collect and discharge filaments continuously discharged from the above-mentioned spinneret downwards, thereby facilitating the lamination of the filaments onto the surfaces of a shoe manufacturing sole and last; A last provided on one side of the above air injection unit; A drive motor and a support for controlling the position and rotation of the above last; and Control unit; including, A shoe manufacturing device characterized in that the speed of the air sprayed from the above air injection unit is 120 to 400 m/sec and the amount of air sprayed is 0.5 to 2 m³ /min.
A raw material supply unit that supplies a thermoplastic resin having a melt index (MI) of 15 to 30 g/10 min to an extruder; An extruder that melts the thermoplastic resin supplied from the above raw material supply unit and supplies it to a spinneret; A spinning die that continuously discharges molten thermoplastic resin from the above extruder into a filament; An air injection unit configured in a shape that is wider at the top and narrower at the bottom to collect and discharge filaments continuously discharged from the above-mentioned spinneret downwards, thereby facilitating the lamination of the filaments onto the surfaces of a shoe manufacturing sole and last; A last provided on one side of the above air injection unit; A robot arm having an actuator at its end to control the position and rotation of the above last; and a control unit; comprising, A shoe manufacturing device characterized in that the speed of the air sprayed from the above air injection unit is 120 to 400 m/sec and the amount of air sprayed is 0.5 to 2 m³ /min.
In claim 1 or 2, A shoe manufacturing device characterized in that the above thermoplastic resin is thermoplastic polyurethane.
In claim 1 or 2, A shoe manufacturing device characterized by having multiple air injection units and spinnerets.
In claim 1 or 2, A shoe manufacturing device characterized by the above air injection unit being provided in series in the vertical direction.
In claim 1 or 2 A shoe manufacturing device characterized in that the above filament has a fineness of 5 to 100 denier.
In claim 1 or 2, A shoe manufacturing device characterized by the fact that the above last and the shoe manufacturing sole rotate.
Step 1: Mounting a shoe manufacturing sole onto a last; A second step of positioning a spinneret and an air injection part on one side of a shoe manufacturing sole mounted on a last in the first step above; A raw material supply unit that supplies a thermoplastic resin having a melt index (MI) of 15 to 30 g/10 min to an extruder; An extruder that melts the thermoplastic resin supplied from the above raw material supply unit and supplies it to a spinneret; A spinning die that continuously discharges molten thermoplastic resin from the above extruder into a filament; An air injection unit configured in a shape that is wider at the top and narrower at the bottom to collect and discharge filaments continuously discharged from the above-mentioned spinneret downwards, thereby facilitating the lamination of the filaments onto the surfaces of a shoe manufacturing sole and last; A last provided on one side of the above air injection unit; A robot arm equipped with an actuator at its end to control the position and rotation of the above last; and Control unit; including, A shoe manufacturing device characterized in that the speed of the air sprayed from the above air injection unit is 120 to 400 m/sec and the amount of air sprayed is 0.5 to 2 m³ /min. Step 3: supplying the thermoplastic resin to the extruder; Step 4, melting the thermoplastic resin in an extruder and supplying it to a spinneret; A fifth step of continuously extruding a filament from the above-mentioned spinneret; A sixth step of concentrating filaments continuously discharged from the above-mentioned spinneret to facilitate lamination onto the surfaces of a sole and a last for shoe manufacturing; and A seventh step in which the filaments gathered in the sixth step are continuously laminated onto the sole and last for shoe manufacturing to form an upper; wherein A method for manufacturing smart shoes, characterized in that the above 6th step is performed by air having a speed of 120 to 400 m/sec and a spray amount of 0.5 to 2 m³ /min, sprayed from an air injection unit provided in a shape that is wider at the top and narrower at the bottom.

Description

Shoe manufacturing apparatus and method for smart manufacturing shoe using the same The present invention aims to provide a shoe manufacturing device capable of automating shoe manufacturing by eliminating manual labor by a worker, and a smart shoe manufacturing method using the same, by forming an upper by melting a thermoplastic resin on one side of a shoe manufacturing sole provided on a last and a last, and continuously extruding and laminating filaments. Recently, driven by improved living standards and the diverse needs of consumers, numerous types of shoes with various designs are being manufactured, and specialized footwear for specific functions is also being released in diverse forms. As essential consumer goods, shoes have established themselves for modern people as both a fashion statement that expresses their identity and a necessity. Busan, South Korea, is a hub for the diverse footwear manufacturing industry, ranging from rubber shoes to sneakers and high-performance athletic shoes, boasting an industrial history spanning over 100 years. While the Korean footwear industry played a pivotal role in driving exports in the 1980s, generating $4 billion in exports, the value of Korean footwear exports has shown a gradual downward trend since 1990. The primary reason for this decline is labor costs; coupled with the appreciation of the Korean won and rising raw material prices, the industry has faced a triple burden. In particular, as the footwear industry is labor-intensive, profitability becomes nonexistent once labor costs reach a certain level of production costs. Generally, shoes consist of a sole that forms the bottom and an upper attached to the top of the sole. As described above, the shoe is formed by combining the sole and the upper. Since the sole and the upper have different materials and different manufacturing methods, they are manufactured separately, and the shoe is produced by attaching the upper to the bottom of the sole or by sewing it together. Looking at prior art related to shoes, Korean Registered Patent Publication No. 10-1858518 discloses an adhesive device and adhesive method for manufacturing a shoe by bonding the upper and midsole of the shoe, and Korean Published Patent Publication No. 10-2004-0054853 discloses a shoe manufacturing method comprising the step of sewing the outer shell and the outsole together while bringing the outer surface of the outer shell adhesive part and the inner surface of the outsole adhesive part, on which adhesive is applied, into close contact. However, since the manufacturing process for shoes produced in this manner is largely carried out manually, an increase in production costs is inevitable. Therefore, there is an urgent need to automate the shoe manufacturing process to reduce labor costs, thereby securing the price competitiveness of Korea's footwear industry and simultaneously transitioning it into a high value-added industry. FIG. 1 is a schematic diagram of a shoe manufacturing device according to the present invention, and FIG. 2 is a structural diagram of a robot arm provided in a shoe manufacturing device according to the present invention for rotating a shoe manufacturing sole and a last, and FIG. 3 is a schematic diagram of the lower part of a spinneret according to the present invention, and FIG. 4 is a flowchart of a method for manufacturing smart shoes according to the present invention. In this application, terms such as “comprising,” “having,” or “having” are intended to specify the existence of the features, numbers, steps, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application. Preferred embodiments of the present invention will be described in more detail below with reference to the attached drawings. To facilitate an overall understanding of the invention, the same reference numerals are used for identical components in the drawings, and redundant descriptions of identical components are omitted. Hereinafter, a shoe manufacturing device according to the present invention and a smart shoe manufacturing method using the same will be described in detail with reference to the attached drawings. FIG. 1 is a schematic diagram of a shoe manufacturing device (200) according to the present invention, FIG. 2 is a structural diagram of a robot arm (270