CN110652069A - Extremely-small curved surface structure and manufacturing method thereof - Google Patents
Extremely-small curved surface structure and manufacturing method thereof Download PDFInfo
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Images
Classifications
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
- A43B13/18—Resilient soles
- A43B13/181—Resiliency achieved by the structure of the sole
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
The invention relates to the field of shoes, in particular to a tiny curved surface structure which is formed by filling and/or splicing and/or arraying and/or grading a plurality of 3D printed units; the unit main body is formed by filling and/or splicing and/or arraying a plurality of curved surfaces; according to the foot motion characteristics of different sports items and different sports characteristic crowds, the extremely-small curved surface structures are designed on the main stress parts of the insole by specific materials, shapes, sizes, positions, densities and the like, so that the corresponding insole buffer performance can be provided for different activities, and the individual requirements of different crowds are met; and the material selects various types, designs and constructs various types, is manufactured according to different various types, has more excellent buffering and resilience performance, and gets rid of the labor-intensive limitation of the traditional shoe manufacturing industry.
Description
Technical Field
The invention relates to the field of shoes, in particular to a structure with an extremely small curved surface and a manufacturing method thereof.
Background
A minimal surface is a surface with an average curvature of zero, given an embedded surface, or more generally an immersed surface (the boundaries of which are generally fixed, but not necessarily bounded), defined as follows: let P be a point on the surface S, consider all curves Ci that pass P on S. Each such Ci has an accompanying curvature Ki at point P. Among these curvatures Ki, there is at least one maximum value K1 and one minimum value K2, these two curvatures K1, K2 being referred to as the main curvature of S.
In practice, extremely small surfaces encompass more extensive content than such minimum area surfaces. The definition of the minimum curved surface can also be extended to a constant average curvature curved surface, that is, a sub-curved surface consisting of points with an average curvature equal to a constant on the curved surface, and when the constant is equal to zero, the constant average curvature curved surface is the minimum curved surface. The minimum curved surface is the critical point of the average curvature flow;
therefore, the extremely-small curved surface is a special structure, and the structure is designed according to the characteristics of the extremely-small curved surface, so that the special physical characteristics can be realized in a certain field, and the non-obvious expectation is achieved.
In terms of sports shoe manufacturing, the sports shoe manufacturing is a technology-intensive production chain, and relates to a plurality of links such as design, CAD modeling, wood pattern carving, mold testing, mold opening, modification and production, so that the research and development production period is long, the process technology is complex, and manual operation cannot be eliminated.
Human athletic activities typically produce forces on the foot, including short or transient impact forces and high cyclic or irregular impacts and loads. Basketball is a known sport involving high foot impact and loading;
during basketball, the foot activity results in higher impact loads on the medial side of the foot and the heel area. This occurs whether the foot maintains proper cushioning during landing, or is improperly landed, possibly causing a series of athletic injuries including stress fractures;
there is clearly a need for a midsole of minimal camber construction and method of use that provides the midsole, which addresses the above-mentioned problems to some extent.
Disclosure of Invention
Objects of the invention
The insole with the structure is manufactured by a 3D printing technology, and the special design of the structure can reduce the impact of the ground on the foot of a user.
(II) technical scheme
To solve the above problems, the present invention provides a structure with a very small curved surface,
the wall thickness of the surface structure of the structure is 0.3 mm-4 mm, and the side length of the unit structure is 3 mm-20 mm;
the structure is composed of a plurality of 3D printed unit fillings and/or splices and/or arrays and/or stages;
the unit body is formed by filling and/or splicing and/or arraying and/or grading a plurality of curved surfaces.
The invention relates to a preferable technical scheme of a minimum curved surface structure, which comprises the following steps: the curved surface is defined by a formula set of cos (x) sin (y) + cos (y) sin (z) + cos (z) sin (x) 0.
The invention relates to a preferable technical scheme of a minimum curved surface structure, which comprises the following steps: the curved surface is defined by a formula set of 3[ cos (x) + cos (y) + cos (z) ] +4cos (x) cos (y) cos (z) ═ 0.
The invention relates to a preferable technical scheme of a minimum curved surface structure, which comprises the following steps: the curved surface is formed by a curved surface defined by a formula set of sin (x) (/ sin), (y) (/ sin), (z) (/ sin), (x) (/ cos), (z) (/ cos), (x) (/ sin), (y) (/ cos), (z) (/ cos), (x) (/ cos), (y) (/ sin), (z) ((0)).
The invention also provides a method for manufacturing the extremely small curved surface structure;
the method is based on 3D printing manufacturing, and is used as a preferable technical scheme of the 3D printing method of the invention: various kinds of 3D printing (additive manufacturing) techniques may be used;
3D printing or "three-dimensional printing" includes various techniques for forming three-dimensional objects by depositing successive layers of material on top of each other;
exemplary 3D printing techniques that may be used include, but are not limited to: fuse Fabrication (FFF), electron beam free form fabrication (EBF), Direct Metal Laser Sintering (DMLS), electron beam melting (EMB), Selective Laser Melting (SLM), Selective Heat Sintering (SHS), Selective Laser Sintering (SLS), gypsum 3D printing (PP), layered entity fabrication (LOM), Stereolithography (SLA), Digital Light Processing (DLP), and various other types of 3D printing or additive manufacturing techniques known in the art;
the insole designed by the method has a shock-absorbing and buffering insole structure, can reduce impact load when falling to the ground from high altitude, and does not sacrifice the subjective motion amplitude of a wearer;
compared with the traditional EVA (ethylene vinyl acetate) shoe insole sports shoe, the 3D printing extremely-small curved surface structure has more excellent buffering performance, simultaneously exerts the advantages of low energy consumption, environmental protection and no pollution of the 3D printing technology, and gets rid of the limitation of labor intensity of the traditional shoe manufacturing industry;
the tiny curved surface structure designed in the tiny curved surface structure through 3D printing can provide shock absorption and buffering performance for sports shoes, the structure formed by filling and/or splicing and/or arraying a plurality of curved surfaces is spliced into a unit main body, the tiny curved surface structure formed by filling and/or splicing and/or arraying a plurality of unit main bodies is well staggered into firm pillars, and the pillars can enable the support performance of the insole to be stronger;
moreover, according to the foot motion characteristics of people with different sports items, daily activities, walking and other characteristics, the minimum curved surface structures are designed on each main stress part on the insole according to specific materials, shapes, sizes, positions and densities, so that the individual requirements of different sports specific people are met;
furthermore, the volume density of the structure can be controlled by 3D printing technology at the beginning of the design. For example, the properties of the product can be changed by selecting an appropriate 3D printing process;
in terms of material characteristics, taking 3D printing technology as an example, the printing material may be made of a material including ink, resin, acrylic, thermoplastic material, photo-curing material, or a combination thereof;
as a preferred solution, the printed material may also be formed to any desired thickness by printing one or more layers in a deposition sequence of materials, and may also include filler material to impart reinforcing or aesthetic aspects to the printed material;
by way of example, the filler material may be a powdered material or dye designed to impart a desired color or color pattern, particles or shavings of metal or plastic, or any other powdered mineral, metal or plastic, and the hardness, strength or elasticity of the printed material may be tailored depending on the desired properties, the filler material may be pre-mixed with the printed material prior to printing;
therefore, the printing material may be preferably a composite material, and may be set according to the production method.
The technical scheme of the invention has the following beneficial technical effects: the insole manufactured by the 3D printing technology has the functions of shock absorption and buffering, can reduce impact load when falling to the ground at high altitude, and does not sacrifice the subjective motion amplitude of a wearer; according to the foot motion characteristics of different sports items and different sports characteristics, the extremely-small curved surface structures are designed on each main stress part on the insole according to specific materials, shapes, sizes, positions and densities, so that the individual requirements of specific people such as different sports, daily activities and walking are met; and the material selects various styles, designs and constructs various styles, is manufactured according to different various styles, has different properties such as buffering, resilience and the like, simultaneously plays the advantages of low energy consumption, environmental protection and no pollution of the 3D printing technology, and gets rid of the limitation of labor intensity of the traditional shoe making industry.
Drawings
FIG. 1 is a schematic side view of a midsole made of a very small curved surface according to the present invention;
FIG. 2 is a schematic perspective view of a midsole made of a very small curved surface according to the present invention;
FIG. 3 is a schematic diagram of a cell filling structure according to the present invention;
fig. 4 is a schematic view of the curved surface structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Example 1
As shown in figures 1 and 2 of the drawings,
FIG. 1 is a schematic side view of a midsole made of a very small curved surface according to the present invention;
FIG. 2 is an isometric view of a midsole formed with minimal curves according to the present invention;
the invention provides a minimum curved surface structure, the wall thickness of the surface structure of the structure is 0.3-4 mm, and the side length of a unit structure is 3-20 mm; the structure is composed of a plurality of 3D printed unit fillings and/or splices and/or arrays and/or stages;
in an alternative embodiment: the unit body is formed by filling and/or splicing and/or arraying and/or grading a plurality of curved surfaces.
In an alternative embodiment: the curved surface is defined by a formula set of cos (x) sin (y) + cos (y) sin (z) + cos (z) sin (x) 0.
In an alternative embodiment: the curved surface is defined by a formula set of 3[ cos (x) + cos (y) + cos (z) ] +4cos (x) cos (y) cos (z) ═ 0.
In an alternative embodiment: the curved surface is formed by a curved surface defined by a formula set of sin (x) (/ sin), (y) (/ sin), (z) (/ sin), (x) (/ cos), (z) (/ cos), (x) (/ sin), (y) (/ cos), (z) (/ cos), (x) (/ cos), (y) (/ sin), (z) ((0)).
A midsole as illustrated in fig. 1 and 2;
it should be understood that: the insole with the structure is filled and/or spliced and/or arrayed by a plurality of the extremely-small curved surface structures in the cavity of the insole.
As shown in fig. 3: the minimal surface structure is composed of a plurality of 3D printed unit filling and/or splicing and/or array and/or grading.
As shown in fig. 4: the unit body is formed by filling and/or splicing and/or arraying a plurality of curved surfaces.
This structure is applied to the shoe midsole: has the functions of absorbing impact energy, relieving the impact of the ground on the foot and distributing the pressure of the sole of the foot; the structure is applied to the middle sole of the shoe and is superior to the traditional middle sole materials such as EVA, PHYLON, PU, silica gel and the like; in addition, different functions of supporting, ventilation, foot fitting, light weight and the like can be realized.
Example 2
The invention also provides a method for manufacturing the extremely small curved surface structure;
in connection with the contents of example 1: the method is based on 3D printing manufacturing, and is used as a preferable technical scheme of the 3D printing method of the invention: various kinds of 3D printing (or additive manufacturing) techniques may be used;
3D printing or "three-dimensional printing" includes various techniques for forming three-dimensional objects by depositing successive layers of material on top of each other;
exemplary 3D printing techniques that may be used include, but are not limited to: fuse Fabrication (FFF), electron beam free form fabrication (EBF), Direct Metal Laser Sintering (DMLS), electron beam melting (EMB), Selective Laser Melting (SLM), Selective Heat Sintering (SHS), Selective Laser Sintering (SLS), gypsum 3D printing (PP), layered entity fabrication (LOM), Stereolithography (SLA), Digital Light Processing (DLP), and various other types of 3D printing or additive manufacturing techniques known in the art;
the insole designed by the method has the functions of shock absorption and buffering, can reduce impact load when falling to the ground at high altitude, and does not sacrifice the subjective motion amplitude of a wearer;
compared with the traditional EVA (ethylene vinyl acetate) insole sports shoes, the 3D printing insole formed by the extremely-small curved surface structure has more excellent buffering and resilience performance, simultaneously exerts the advantages of low energy consumption, environmental protection and no pollution of the 3D printing technology, breaks away from the labor-intensive limitation of the traditional shoe making industry, shortens the processing period, can be customized and the like;
the tiny curved surface structure designed in the tiny curved surface structure through 3D printing can provide shock absorption and buffering performance for sports shoes, the structure formed by filling and/or splicing and/or arraying a plurality of curved surfaces is spliced into a unit main body, the tiny curved surface structure formed by filling and/or splicing and/or arraying a plurality of unit main bodies forms good firm struts which are staggered, and the struts can enable the support performance of the insole to be stronger;
moreover, according to the foot motion characteristics of different sports items and different sports characteristics of people, the extremely-small curved surface structures are designed on each main stress part on the insole by specific materials, shapes, sizes, positions and densities, so that the individual requirements of different sports specific people are met;
furthermore, the volume density of the structure can be controlled by 3D printing technology at the beginning of the design. For example, the properties of the product can be changed by selecting an appropriate 3D printing process;
in terms of material characteristics, taking 3D printing technology as an example, the printing material may be made of a material of ink, resin, acrylic, thermoplastic material, photo-curing material, or a combination thereof;
as a preferred solution, the printed material may also be formed to any desired thickness by printing one or more layers in a deposition sequence of materials, and the printed material may also include filler material to impart an enhanced or aesthetic aspect to the printed material;
by way of example, the filler material may be a powdered material or dye, particles or shavings of metal or plastic, or any other powdered mineral, metal or plastic, designed to impart a desired color or color pattern or transition, and may tailor the hardness, strength, or elasticity of the printed material depending on the desired properties, the filler material may be pre-mixed with the printed material prior to printing, or may be mixed with the printed material during printing onto the upper;
therefore, the printing material may be preferably a composite material, and may be set according to the production method.
Further, the method comprises the following steps:
this 3D prints distribution of structure, for the user of different sports, different motion characteristics provides the most reasonable mechanics feedback, supports the user as bradyseism and lattice support that kick-backs and accomplishes technical action, provides support and protection wearing person and avoids the motion damage for the wearing person.
The invention also briefly describes a manufacturing method of the 3D printing insole, which comprises the following steps:
s1, 3D digital modeling is carried out on the 3D minimum curved surface structure sample block or the shoe insole by utilizing computer 3D design software, and the 3D minimum curved surface structure sample block or the shoe insole 3D digital model is led into a 3D printer to be printed;
s2, manufacturing a 3D minimum curved surface structure sample block by using a 3D printer of SLS selective laser sintering;
s3, 3D printing of the 3D minimum curved surface structure sample block or the shoe midsole utilizes an SLS selective laser sintering technology, namely, powder on a powder bed is subjected to selective sintering layer by laser generated by a laser under the control of a computer, the tight combination of TPU powder particles is ensured by selecting a proper sintering process, and finally, the printing of the whole product is realized by layer-by-layer stacking;
s4, TPU powder adopted by the 3D printing shoe insole is micron-sized powder, and the sintering molding temperature is 80-180 ℃.
In an alternative embodiment: the above mentioned particle size and forming temperature of the TPU powder are all possible ones for the present invention, and the particle size and forming temperature of the TPU powder used for 3D printing the shoe midsole include, but are not limited to, the above possibilities.
3D printing of a sample block with a tiny curved surface structure for a midsole, wherein a cavity is filled and/or spliced and/or arrayed by using a unit structure, and the unit structure is formed by filling and/or splicing and/or arraying a plurality of curved surfaces; the quasi-flexible curved surfaces are connected to form uniform and porous spiral icosahedron regular structure filling, and the structural pore diameter of the quasi-flexible curved surfaces can be automatically adjusted based on 3D printing;
the three-dimensional type that this structure formed is filled in the shoes cavity, can become the sports shoes through the structure and provide shock attenuation shock-absorbing capacity, and in addition, this structure compression deformation back, it is stronger to resume deformation ability, can provide certain resilience for the wearer.
Example 3
The invention also provides experimental data;
the weight bearing of the foot is often considered to be the three-point loading of the first metatarsophalangeal joint, the fifth metatarsophalangeal joint and the calcaneus. The pressure on the foot is therefore graphically reflected with a larger area of the pressure bearing area of both the forefoot and calcaneus. Stress fractures are the result of constant impact strain on the bone. Therefore, when the insole is designed, the 3D printing minimum curved surface structure is correspondingly designed aiming at the bearing areas with higher sole pressure at the front sole and the rear sole. Under high impact loading conditions of ground reaction to the human body during movement of the human body, the forefoot and rearfoot portions are designed to compressively deform, resulting in a relatively short vertical displacement of the midsole portion under reduced or equal pressure. In the process, the athlete wearing the athletic shoe of the midsole structure may experience the resiliency of the midsole and a corresponding cushioning or "sinking" sensation, and the load experienced by the wearer may be reduced, thereby protecting the wearer's foot from injury. In the whole process, the impact force attenuation is realized by the material compression of the corresponding areas of the half sole and the half sole of the insole part.
Further: according to other physical property tests of the invention, the deformation change range of the 3D printed minimum curved surface structure sample block for the insole of the shoe can be 10-80%, the rebound resilience can be 20-80%, the hardness (Shore A hardness according to ASTM D2240 standard) of the material used in the example can be 60-95A, the tensile strength can be 5-30 Mpa, the elongation at break can be 300-800%, the tensile modulus can be 10-200 Mpa, and the properties of the materials with different hardness are different.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (5)
1. A structure with a tiny curved surface is characterized in that,
the wall thickness of the surface structure of the structure is 0.3 mm-4 mm, and the side length of the unit structure is 3 mm-20 mm;
the structure is composed of a plurality of 3D printed unit fillings and/or splices and/or arrays and/or stages;
the unit body is formed by filling and/or splicing and/or arraying and/or grading a plurality of curved surfaces.
2. The extremely small curved surface structure according to claim 1, wherein the curved surface is formed by a curved surface defined by the formula set of cos (x) sin (y) + cos (y) sin (z) + cos (z) sin (x) 0.
3. The structure of claim 1, wherein the curved surface is defined by the formula set of 3[ cos (x) + cos (y) + cos (z) ] +4cos (x) cos (y) cos (z) ═ 0.
4. The structure of claim 1, wherein the curved surface is defined by a set of equations sin (x) ((x) sin (y) ((z) + sin (x) ((x)) cos (y) ((z)) + cos (x) ((y) ((z)) + sin (x)) (y)) ((z)) -0).
5. A method for manufacturing an extremely small curved surface structure according to any one of claims 1 to 4, comprising the steps of:
s1, 3D digital modeling is carried out on the 3D minimum curved surface structure sample block or the shoe insole by utilizing computer 3D design software, and the 3D minimum curved surface structure sample block or the shoe insole 3D digital model is led into a 3D printer to be printed;
s2, manufacturing a 3D minimum curved surface structure sample block by using a 3D printer of SLS selective laser sintering;
s3, 3D printing of the 3D minimum curved surface structure sample block or the shoe insole by using an SLS selective laser sintering technology, scanning and irradiating TPU powder (or nylon powder) as a printing raw material layer by layer under the control of a computer by using a laser, sintering and bonding of the TPU powder are realized, and the TPU powder is stacked layer by layer to realize molding;
s4, TPU powder adopted by the 3D printing shoe insole is micron-sized powder, and the sintering molding temperature is 80-180 ℃.
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| CN201910986358.9A CN110652069A (en) | 2019-10-17 | 2019-10-17 | Extremely-small curved surface structure and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113303549A (en) * | 2020-02-26 | 2021-08-27 | 初石智能科技(上海)有限公司 | Insole, footwear product, three-dimensional data processing method and 3D printing method |
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