Method for manufacturing an integrally-formed shoe having no machine sewing

• US 9,986,780 B2
• Filed: 08/17/2015
• Issued: 06/05/2018
• Est. Priority Date: 08/18/2014
• Status: Expired due to Fees

• Current Assignee: Kurt Lien
• Original Assignee: Kurt Lien
• Inventors: Lien, Kurt
• Primary Examiner(s): LEE, EDMUND H
• Application Number:
  US14/827,816
• Publication Number:
  US 20160044985A1
• Time in Patent Office: 1,023 Days
• Field of Search: None
• CPC Class Codes: A43B 9/02 Footwear stitched or nailed through
• CPC Class Codes: A43D 25/20 Arrangements for activating or for accelerating setting of adhesives, e.g. by using heat
• CPC Class Codes: A43D 3/02 Lasts for making or repairing shoes making of wooden lasts B27M3/20
• CPC Class Codes: A43D 3/04 Pneumatic lasts; Elastic lasts
• CPC Class Codes: A43D 86/00 Machines for assembling soles or heels onto uppers, not provided for in groups A43D25/00 - A43D83/00, e.g. by welding
• CPC Class Codes: B29C 65/02 by heating, with or without pressure
• CPC Class Codes: B29C 65/78 Means for handling the parts to be joined, e.g. for making containers or hollow articles , e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus

Abstract

An integrally-formed shoe having no machine sewing and a manufacturing method thereof are provided. A structure of the shoe includes: a lining sock body that uses a knitting manner and includes an opening; and a surface sock body that uses a knitting manner and includes an opening and a sole, where the opening of the lining sock body is nested inside the surface sock body; the two sock bodies are properly mounted on a sock machine; low melting point yarn and nylon elastic filament are mixed into knitting of the lining sock body; low melting point yarn, nylon elastic filament, and set yarn are mixed into knitting of the surface sock body; after the sock machine weaves and molds the two sock bodies into a whole, a hollow mold is nested inside the surface sock body; the whole is heated and baked to slightly damage surface tissues of the yarn, and is then cooled to make the set yarn in knitwear be reorganized and extended according to the shape of an external fixing mold, to present a predetermined pattern; and after the surface sock body presents the predetermined pattern, the sole is directly bonded to the bottom of the surface sock body so as to achieve bonding of the sole and the surface sock body, to complete the integrally-formed shoe having no machine sewing, so that a user feels more comfortable due to no machine sewing.

Claims

1. A method for manufacturing an integrally-formed shoe having no machine sewing, comprising the following steps:

(a) encasing a surface sock body in a lining sock body with inside out, and knitting one end of the lining sock body to one end of the surface sock body to form a first sock body, wherein the lining sock body comprises nylon elastic filament and low melting point yarn which is mixed into an outer layer, and the surface sock body comprises nylon elastic filament, and low melting point yarn and set yarn which are mixed into an inner layer;

(b) nesting a hollow mold inside the first sock body, wherein the hollow mold is heatable;

(c) an external fixing mold clamping the outside of the first sock body while the hollow mold is inside the first sock body;

(d) heating the hollow mold to raise the temperature of the first sock body while the external fixing mold is clamped onto the outside of the first sock body and the hollow mold is inside the first sock body, to cause the low melting point yarn in the lining sock body and the surface sock body of the first sock body to be adhered to each other, so that the lining sock body and the surface sock body are bonded to form a second sock body;

(e) stopping heating the hollow mold, wherein the nylon elastic filament of the second sock body is shrunk into a shoe shape;

(f) cooling the second sock body after the heating has stopped and while the external fixing mold is clamped onto the outside of the first sock body and the hollow mold is inside the first sock body, wherein the set yarn of the second sock body is shaped and the nylon elastic filament no longer has flexibility, and the external fixing mold molding the second sock body into a third sock body of a predetermined shoe shape; and

(g) bonding a sole to the bottom of the third sock body, so as to complete the integrally formed shoe having no machine sewing.

2. The method for manufacturing an integrally-formed shoe having no machine sewing according to claim 1, wherein the hollow mold is provided with one to a plurality of steam holes on its surface.

3. The method for manufacturing an integrally-formed shoe having no machine sewing according to claim 1, wherein the hollow mold is further provided with a plurality of positioning pinholes, and the positioning pinholes are located on the edge of and at the bottom of the hollow shoe mold.

4. The method for manufacturing an integrally-formed shoe having no machine sewing according to claim 1, wherein the sock body is made from fiber cotton, combed cotton, mercerized cotton, spandex, lycra, polyamide fibers, nylon, acrylic fibers, polypropylene, polyester, terylene, viscose fibers, tencel, bamboo fibers, modal, linen, or supima.

5. The method for manufacturing an integrally-formed shoe having no machine sewing according to claim 1, wherein at the bottom of the sole, a glue is used to bond non-slip particles, injection-molded soles and sewn soles.

6. The method for manufacturing an integrally-formed shoe having no machine sewing according to claim 1, wherein leather or PVC artificial leather is pasted on the surface sock body, or printing is printed (offset-printed), heat-transfer printed or embroidered on the surface sock body.

7. The method for manufacturing an integrally-formed shoe having no machine sewing according to claim 1, wherein the sole is a rubber sole, a plastic sole, a TPR sole, a polyurethane sole (PU sole), a leather sole, an EV A sole (commonly known as a foam sole), or a composite sole.

8. The method for manufacturing an integrally-formed shoe having no machine sewing according to claim 1, wherein the hollow mold and the external fixing mold are made from iron, copper or aluminum.

9. The method for manufacturing an integrally-formed shoe having no machine sewing according to claim 1, wherein a waterproof and dustproof material or coating is added after the surface sock body presents the predetermined shoe shape.