Fig. 1.
Design framework of recycled sneakers based on 3D parametric modeling and adaptive model
Fig. 2.
Stl format model of foot type 3D point cloud
Fig. 3.
Extraction of sole contour of shoe last
Table 1.
Foot shape data of 3D intelligent plantar scanning instrument
| NO. | Parameter | Left Foot | Right Foot |
|---|---|---|---|
| 0 | Foot length | 234.014 | 233.978 |
| 1 | Toe diagonal width | 80.936 | 82.729 |
| 2 | Anterior width of metatarsophalange | 82.593 | 81.090 |
| 3 | Metatarsophalangeal oblique width | 85.244 | 87.084 |
| 4 | Toe oblique circumference | 183.916 | 184.593 |
| 5 | Anterior circumference of metatarsophalange | 190.255 | 185.235 |
| 6 | Metatarsophalangeal oblique circumference | 205.862 | 207.322 |
| 7 | Foot waist circumference | 205.001 | 205.943 |
| 8 | Tarsal circumference | 206.074 | 207.858 |
| 9 | Back circumference | 213.915 | 213.770 |
| 10 | Foot arch height | 5.058 | 5.061 |
| 11 | Tarsal height | 48.987 | 50.404 |
| 12 | Location length | 147.359 | 147.336 |
| 13 | Thumb flip angle | 10.540 | 9.989 |
| 14 | Heel width | 63.842 | 62.438 |
| 15 | Thumb height | 21.892 | 19.377 |
Fig. 4.
Layered modeling process of the midsole in sports shoes
Fig. 5.
Parametric design process of shoe midsole model
Fig. 6.
Initial contour drawing of sole extracted from digital shoe last
Fig. 7.
Design drawing of length and width orientation and shape setting dimension marking of midsole contour
Fig. 8.
Sketch of the outline of the midsole of shoes displaying the dimension code after redimensioning and constraint
Fig. 9.
Definition and design of some dimensional parameters in the thickness direction of the midsole model
Table 2.
Design of parameter name, size code and size value relationship in the width direction and length direction of the sketch outline of the shoe midsole
| Size Code | Parameter Name | Size Value | Parameter relationship | Size Code | Parameter Name | Size Value | Parameter relationship |
|---|---|---|---|---|---|---|---|
| sd309 | w7 | 45 | w8=w7 | sd329 | L10 | 117 | L1=L10 |
| sd291 | w1 | 18 | w1=w2-15 | sd291 | L1 | 117 | L10=L1 |
| sd299 | w2 | 32 | w2=w3-3 | sd299 | L2 | 105 | L2=L1-12 |
| sd301 | w3 | 35 | w3=w4+2 | sd301 | L3 | 76 | L3=L2-29 |
| sd301 | w4 | 32 | w4=w5+1 | sd301 | L4 | 26 | L4=L3-50 |
| sd297 | w5 | 31 | w5=w6-8 | sd297 | L5 | 16 | L5=L4-10 |
| sd305 | w6 | 39 | w6=w7-6 | sd305 | L6 | 38 | L6=L5+22 |
| sd308 | w8 | 45 | w8=w7 | sd308 | L7 | 73 | L7=L6+35 |
| sd304 | w9 | 39 | w9=w8-6 | sd304 | L8 | 100 | L8=L7+27 |
| sd296 | w10 | 28 | w10=w9-11 | sd296 | L9 | 114 | L9=L8+14 |
| sd288 | w11 | 15 | w11=w10-13 | sd288 | L11 | 112 | L11=L10-5 |
| sd287 | w12 | 9 | w12=w11-6 | sd287 | L12 | 96 | L12=L11-16 |
| sd295 | w13 | 26 | w13=w12+17 | sd295 | L13 | 70 | L13=L12-26 |
| sd305 | w14 | 39 | w14=w13+13 | sd305 | L14 | 46 | L14=L13-24 |
| sd310 | w15 | 45 | w15=w14+6 | sd310 | L15 | 49 | L15=L14+3 |
| sd307 | w16 | 44 | w16=w15-1 | sd307 | L16 | 16 | L16=L15-33 |
| sd303 | w17 | 38 | w17=w16-6 | sd303 | L17 | 52 | L17=L16+36 |
| sd300 | w18 | 32 | w18=w17-6 | sd300 | L18 | 73 | L18=L17+21 |
| sd293 | w19 | 21 | w19=w18-9 | sd293 | L19 | 100 | L19=L18+27 |
| sd326 | w20 | 3 | w20=w19-20 | sd326 | L20 | 114 | L20=L19+14 |
Table 3.
Names, codes and relationships of some key parameters in the height direction of the midsole model
| Size Code | Parameter Name | Size Value | Parameter Relationship |
|---|---|---|---|
| sd1 | H1 | 36 | 36 |
| sd12 | H2 | 37 | H2=H1+1 |
| sd15 | H3 | 34 | H3=H2-3 |
| sd18 | H4 | 16 | H4=H3-18 |
| sd20 | H5 | 15 | H5=H4-1 |
| sd1 | H6 | 20 | H6=H1-16 |
| sd13 | H7 | 22 | H7=H6+2 |
| sd16 | H8 | 23 | H8=L7+1 |
| sd20 | H9 | 13 | H9=H8-10 |
| sd21 | H10 | 19 | H10=H9+6 |
Fig. 10.
Parametric generation of different types of new models
Fig. 11.
Parametric design and digital assembly of insole
Fig. 12.
Design process of outsole shape and digital virtual assembly of midsole and outsole
Fig. 13.
Matching design between sole structures