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Negative poisson ratio structure shock absorption shoe sole and shoe pad 3d printing method

A negative Poisson's ratio, 3D printing technology, applied in the field of 3D printing, can solve the problems of limited application, limited negative Poisson's ratio structure, low strength and hardness, etc., to achieve huge economic benefits, prolong service life, and improve the effect of strength

Inactive Publication Date: 2018-07-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the material produced by the above method cannot be used practically, because this material cannot make good use of its volume deformation, that is, the transverse expansion cannot obtain the optimal value.
And the strength and hardness of the material are too low. If the hardness and strength of this material are enhanced, the negative Poisson's ratio phenomenon of the material will disappear, because the interior of the material needs enough structural space to satisfy the bending of the chain and the rotation expansion of the node. , so the material must be porous, and the porous structure makes the material a softer substance, which limits its application in engineering
[0013] Due to the complexity of many auxetic structures, traditional molding techniques and subtractive manufacturing techniques are difficult to achieve, thus limiting the industrial development of negative Poisson's ratio structures

Method used

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  • Negative poisson ratio structure shock absorption shoe sole and shoe pad 3d printing method
  • Negative poisson ratio structure shock absorption shoe sole and shoe pad 3d printing method
  • Negative poisson ratio structure shock absorption shoe sole and shoe pad 3d printing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 Example 1 is a method of using thermoplastic polyurethane elastomer 3D to print negative Poisson's ratio structure shock-absorbing soles and insoles

[0045] 1. If figure 1 As shown, take a certain amount of thermoplastic polyurethane elastomer, grind and pulverize it at a low temperature of -100°C, sieve out 1-200 micron polyurethane elastomer powder, and send the polyurethane elastomer powder into a 3D printer;

[0046] In particular, the use of 50-100 micron polyurethane elastomer powder has a better standby effect;

[0047] 2. Use computer 3D modeling software to draw the sole and insole with a stretched structure and negative Poisson's ratio structure inside, such as figure 2 As shown, it is to draw a schematic diagram of the sole structure with an auxetic structure inside, such as image 3 As shown, it is the sole of the internal structure Re-entrantOpen-Cell Microstructure (re-entrant opening structure), Figure 4 for figure 2 Schematic diagram of...

Embodiment 2

[0054] Example 2 Example 2 is a method of using thermoplastic polyurethane elastomer 3D to print negative Poisson's ratio structure shock-absorbing soles and insoles

[0055] 1. If figure 1 As shown, take a certain amount of thermoplastic polyurethane elastomer, grind and pulverize it at a low temperature of -100°C, sieve out 1-200 micron polyurethane elastomer powder for use, and send the polyurethane elastomer powder into the 3D printer;

[0056] In particular, the use of 50-100 micron polyurethane elastomer powder has a better standby effect;

[0057] 2. Use computer 3D modeling software to draw the sole and insole with a stretched structure and negative Poisson's ratio structure inside, such as figure 2 As shown, it is to draw a schematic diagram of the sole structure with an auxetic structure inside, such as image 3 As shown, it is the sole of the internal structure Re-entrantOpen-Cell Microstructure (re-entrant opening structure), Figure 4 for figure 2 Schematic ...

Embodiment 3

[0064] Embodiment 3 Embodiment 3 is a method of using thermoplastic polyurethane elastomer 3D to print negative Poisson's ratio structure shock-absorbing soles and insoles

[0065] 1. If figure 1 As shown, take a certain amount of thermoplastic polyurethane elastomer, grind and pulverize it at a low temperature of -100°C, sieve out 1-200 micron polyurethane elastomer powder for use, and send the polyurethane elastomer powder into a 3D printer;

[0066] In particular, the use of 50-100 micron polyurethane elastomer powder has a better standby effect;

[0067] 2. Use computer 3D modeling software to draw the sole and insole with a stretched structure and negative Poisson's ratio structure inside, such as figure 2 As shown, it is to draw a schematic diagram of the sole structure with an auxetic structure inside, such as image 3 As shown, it is the sole of the internal structure Re-entrantOpen-Cell Microstructure (re-entrant opening structure), Figure 4 for figure 2 Schema...

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Abstract

The invention provides a negative poisson ratio structure shock absorption shoe sole and shoe pad 3d printing method and belongs to the technical field of 3d printing. According to the negative poisson ratio structure shock absorption shoe sole and shoe pad 3d printing method, a certain amount of polymer elastomer is selected and fabricated into corresponding powder under certain conditions, thena shoe sole model of a shoe sole stretching structure is drawn up by 3d computer modeling software, and then the polymer elastomer is printed into computer-drawn shoe soles and shoe pads by a laser sintering 3d printer under given conditions. By means of the negative poisson ratio structure shock absorption shoe sole and shoe pad 3d printing method, the problems which are difficult to realize by the traditional model forming technology and material reduction fabricating technology are solved, and the fabricated shoe soles and shoe pads by 3d printing are strong in impact toughness and furtherhave excellent elasticity, shear resistance, shock absorption performance and the like.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a method for 3D printing negative Poisson's ratio structure shock-absorbing soles and insoles. Background technique [0002] 3d printing: including selective laser sintering 3d printing (SLS), selective thermal sintering (shs, fused deposition (fdm)), layered solid manufacturing (lom), photopolymerization 3d printing. [0003] Negative Poisson's Ratio Structure: Almost all materials have a Poisson's ratio, which means that these materials shrink laterally and expand in cross-section when compressed. The negative Poisson's ratio structure is also called auxetic lattice structures, which means that when stretched, the material expands laterally within the elastic range, and when compressed, the material shrinks laterally. [0004] Negative Poisson's ratio structures are common: Re-entrant Open-Cell Microstructure (re-entrant open-pore structure), Generalized 3d Tet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/153B29C64/386B29C64/393B33Y10/00B33Y50/00B33Y50/02B29L31/50
CPCB29L2031/50B29L2031/504B33Y10/00B33Y50/00B33Y50/02
Inventor 费国霞夏和生甘鑫鹏
Owner SICHUAN UNIV
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