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3D printing method for high-performance foam shoe midsole

A 3D printing, high-performance technology, applied in the field of footwear manufacturing, can solve the problems affecting the dimensional stability of footwear products, complex process, low efficiency, etc., and achieve the effect of personalized customization, short preparation process and high efficiency

Inactive Publication Date: 2019-09-03
ANTA CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For example, using the above-mentioned 3D printing combined with supercritical foaming technology to prepare the midsole of polyurethane foam shoes, after printing out the embryonic form, it will be foamed, and the back-end foaming needs water steam. This method has the disadvantages of complicated process and low efficiency. problems, but also affect the dimensional stability of footwear and other properties

Method used

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  • 3D printing method for high-performance foam shoe midsole
  • 3D printing method for high-performance foam shoe midsole
  • 3D printing method for high-performance foam shoe midsole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Thermoplastic polyurethane elastomer particle (Estane 58315 TPU of Lubrizol company) is put into autoclave after drying, feeds nitrogen, is heated up to 100 ℃, pressurizes to 20MPa, to reach supercritical state, to described elastomer particle The material is saturated, and after 2 hours, the pressure is released and taken out at a pressure release rate of 5MPa / s; the saturated resin particles are put into the screw extrusion 3D printer through the hopper, and the temperature of the printer cavity is set to 220°C. The temperature was set at 140°C. The diameter of the die mouth is 1.0mm; the diameter of the cavity with the temperature control device at the die mouth is 0.8mm. according to figure 2 The 3D digital model of the midsole shown is 3D printed by fusion deposition to obtain the foamed sports shoe midsole.

[0042] The structure of the midsole of the foamed sports shoes is as follows: figure 2 As shown, the size of the midsole is US9.5 (the thickness of the ...

Embodiment 2

[0044] Thermoplastic polyurethane elastomer particles (Elastollan 1175A10W TPU of BASF Company) were dried and added into the barrel of a twin-screw extruder, melted and mixed at a temperature of 220°C, and extruded to obtain a printing wire (the diameter of the wire is 1.75 mm).

[0045] Put the wire into the autoclave, feed nitrogen, raise the temperature to 140°C, pressurize to 20MPa to reach the supercritical state, saturate the elastomer wire, take it out after 2 hours, and release the pressure The speed is 5MPa / s; the saturated resin wire is put into the screw extrusion 3D printer through the feed port, the temperature of the printer cavity is set to 220°C, and the temperature at the nozzle is set to 140°C. according to figure 2 The three-dimensional digital model of the midsole shown is 3D printed by fusion deposition to obtain the midsole of foamed sports shoes (the specifications are the same as in Example 1).

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Abstract

The invention provides a 3D printing method for a high-performance foam shoe midsole. The method comprises the following steps that shoes are saturated through thermoplastic elastomer resin particlesor wires by using supercritical state gas, after slow pressure relief by a certain time, a treated material is obtained; and the treated material is extruded after melting, and meanwhile, the treatedmaterial is printed and foamed according to a three-dimensional digital model of the midsole through a fusion deposition forming mode to obtain the 3D printing high-performance foam shoe midsole. According to the method, the ultra-light high-resilience shoe midsole material can be rapidly prepared, the midsole material can be directly formed through 3D printing, rear-end mold pressing molding andwater vapor forming process are not needed, the preparation process is short, the efficiency is higher, and personalized customization can be realized. Meanwhile, the midsole prepared by the method has the characteristics of low density, good physical property and durability, and better wearing and running experience is provided for a wearer.

Description

technical field [0001] The invention relates to the technical field of footwear manufacturing, in particular to a method for 3D printing high-performance foam shoe midsoles. Background technique [0002] 3D printing technology is a technology based on digital model files, which realizes the bonding of materials through layer-by-layer printing, and finally constructs the desired object. Currently developed technologies include fused deposition modeling (FDM), selective laser sintering (SLS), stereolithography (SLA) and digital light processing (DLP). Because 3D printing technology does not require traditional molds, it can directly print out physical products from different shapes of 3D graphics in the computer. In recent years, it has been widely used in the shoe industry. At the same time, this technology also has high automation and high efficiency High and personalized customization and other characteristics. Although the rapid manufacturing and personalized customizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/118B29C64/314B29C64/393B33Y30/00B33Y40/00B33Y50/02B29D35/12B29C44/60C08J9/12C08L75/04
CPCB29C44/60B29D35/122B33Y30/00B33Y40/00B33Y50/02B29C64/118B29C64/314B29C64/393C08J9/122C08J2203/06C08J2203/08C08J2375/04
Inventor 熊祖江埃斯塔尼斯劳·菲利普·苏亚雷斯·多斯桑托斯袁晨安格斯·尼姆林·沃德洛马克·安德鲁·克罗嫩伯格李苏
Owner ANTA CHINA
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