CN108451676B - A kind of 3D printing flexibility receptive cavity with adaptivity - Google Patents
A kind of 3D printing flexibility receptive cavity with adaptivity Download PDFInfo
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- CN108451676B CN108451676B CN201810115628.4A CN201810115628A CN108451676B CN 108451676 B CN108451676 B CN 108451676B CN 201810115628 A CN201810115628 A CN 201810115628A CN 108451676 B CN108451676 B CN 108451676B
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- printing
- receptive cavity
- cavity
- elasticity modulus
- fiber reinforced
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/50—Prostheses not implantable in the body
- A61F2/78—Means for protecting prostheses or for attaching them to the body, e.g. bandages, harnesses, straps, or stockings for the limb stump
- A61F2/80—Sockets, e.g. of suction type
-
- 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
- B33Y80/00—Products made by additive manufacturing
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Manufacturing & Machinery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a kind of 3D printing flexibility receptive cavity with adaptivity, including receptive cavity inner cavity and receive chamber enclosure, the inner cavity of the receptive cavity and shell using 3D printing integrated molding, printed material is continuous fiber reinforced composite materials；The receptive cavity has flexibility, and the elasticity modulus for making the material of the receptive cavity is variable in axial direction, gradient respectively, and by adjusting the technological parameter of 3D printing, processing prepares the receptive cavity for having elasticity modulus change of gradient and can be adaptive；The present invention prepares prosthetic socket by the way of continuous fiber composite printing, has both alleviated weight and has also improved intensity, while having improved the comfort level of user and prosthetic socket contact portion stump using flexible design；Integration, which is printed with, to be conducive to improve receptive cavity inner cavity and receives the degree of agreement of chamber enclosure, increases the comfort level of prosthetic wearing, shortens the time of preparation flow, substantially reduce manufacturing cost.
Description
Technical field
The invention belongs to the field of medical instrument technology, specifically, it is flexible to be related to a kind of 3D printing with adaptivity
Receptive cavity.
Background technique
Receptive cavity is the most important component part of artificial limb, it is directly contacted with deformed limb, accommodates deformed limb, contains soft group of deformed limb
It knits, supports human body weight, control artificial limb movement.
The bottom of sorption cavity is not contacted with stump, and there are a sorption spaces between them, and use suction valve
It is closed.The negative pressure that sorption space generates is one of the mechanism of this receptive cavity suspention.Under the action of sorption negative pressure, blood
It is stranded in stump, easily causes stump extravasated blood, oedema damages amputee.Since stump is not contacted with receptive cavity, deformed limb with
Receptive cavity contact area reduces, and the strength that deformed limb surface is born correspondingly also reduces, and more power will be transmitted by ischium.
The gait that the transfer mode of this power wears artificial limb to patient can have an adverse effect.Ischium can also be caused to certain patients
Discomfort.Although this receptive cavity has such serious disadvantage, it is still applied in artificial thigh assembly than wide, main
It wants the reason is that the manufacturing technology requirement of this receptive cavity is lower.
Ideal artificial limb should be most big end load-bearing, and amputee should be able to be stood with deformed limb in receptive cavity bottom, just as cutting
It stands before limb the same on ground, is farthest that artificial limb tends to physiological essential condition with stump load-bearing.Stump load-bearing is not only
Can directly it feel with important biomechanical significance, and by stump contact and load-bearing, the sensory nervous system of amputee
By the important information of pressure and movement from bottom end.
In order to realize the most big end load-bearing of artificial limb, receptive cavity is needed to cooperate well with deformed limb end.It is residual due to patient
Limb situation is different, and the shape of prosthetic socket varies with each individual.Current many people take 3D printing to make receptive cavity, but
That can only solve the problems, such as personalization, if cooperation it is complete to a certain degree or experience, gimmick, skill for depending on technician etc. because
Element, it is difficult to guarantee accuracy.It is fed back according to many amputees, in the artificial limb that amputee installs in different positions, there is no certain
Applicability, such as: when the good artificial limb of patient in sitting installation and debugging, since the shrinkage degree of muscle is different, standing up will produce on foot
Sense of discomfort；The good artificial limb of standing installation and debugging, sitting posture also may experience discomfort sense.And hardness is solid everywhere for the material that uses of receptive cavity
Order one exacerbates the sense of discomfort of prosthetic wearing.
Summary of the invention
In order to overcome the above-mentioned problems of the prior art, the object of the present invention is to provide a kind of 3D with adaptivity
Flexible receptive cavity is printed, which is prepared by the way of continuous fiber composite printing, both alleviated weight and also improved
Intensity, while using the comfort level of flexible design raising user and prosthetic socket contact portion stump.Integration is printed with
Conducive to improving receptive cavity inner cavity and receiving the degree of agreement of chamber enclosure, increase the comfort level of prosthetic wearing, shorten preparation flow and
Time substantially reduces manufacturing cost.
In order to achieve the above object, technical solution of the present invention:
A kind of 3D printing flexibility receptive cavity with adaptivity, including receptive cavity inner cavity and receive chamber enclosure, it is described to connect
By chamber inner cavity and receive chamber enclosure using 3D printing integrated molding, printed material is continuous fiber reinforced composite materials；It is described
Receptive cavity has flexibility, and the elasticity modulus for making the material of the receptive cavity is variable in axial direction, gradient respectively, makes the receiving
The elasticity modulus of the material of chamber is controlled by crystallinity in 3D printing and fiber content, by adjusting 3D printing technological parameter, processing
Prepare the receptive cavity that there is elasticity modulus change of gradient and can be adaptive.
The area distribution that the receptive cavity requires elasticity modulus high receptive cavity inner cavity outer wall with receive chamber enclosure, connect
By chamber axial direction bottom end and connector connecting portion and receive chamber enclosure stress concentration portion position, and receiving in direct contact with the skin
The inner wall elasticity modulus of intracavitary chamber is low, and receptive cavity remaining area is from low elastic modulus to high elastic modulus gradual transition step by step, i.e.,
Elasticity modulus of materials is from the top of receptive cavity axial direction to bottom end, radial inside to outside change of gradient, variation range 6MPa-
Between 21GPa.
The elasticity modulus of the receptive cavity different zones, which is distributed to the identifiable data information conversion of 3D printing equipment, to abide by
Follow elasticity modulus and continuous fiber reinforced composite materials crystallinity and the company of the 3D printing product of continuous fiber reinforced composite materials
The mapping relations of continuous fibre reinforced composites fiber content, according to the material under different crystallinity and under different fiber contents
The experimental data of mechanical property realizes the mapping relations of elasticity modulus of materials and crystallinity and fiber content.Receptive cavity material simultaneously
The elasticity modulus of material also can carry out local regulation according to the surface skin situation and actual loading of deformed limb.
Specifically, the elasticity modulus of the 3D printing product of continuous fiber reinforced composite materials and continuous fiber reinforcement composite wood
The mapping relations of the fiber content of material include: fibre composition proportion and continuous fiber increasing in continuous fiber reinforced composite materials
Institute's fibre-bearing in the mapping relations and continuous fiber reinforced composite materials of the elasticity modulus of the 3D printing product of strong composite material
The elasticity modulus mapping relations of the 3D printing product of length and continuous fiber reinforced composite materials；Continuous fiber reinforced composite materials
The stretching of the 3D printing product of middle fiber content and continuous fiber reinforced composite materials, bending modulus are positively correlated in a certain range
Property；Long fiber reinforcement composite material enhances the stretching of its 3D printing product, bending modulus, and short fiber reinforced composite enhances it
The shear strength of 3D printing product.
The receptive cavity is prepared using the 3D printing technique bonded composite fiber placement of fused glass pellet.
The adjustable process parameters of the realization elasticity modulus change of gradient include: the working chamber temperature of 3D printer, 3D
The printing baseplate temp of printer, 3D printer nozzle temperature and for being added in the continuous fiber reinforced composite materials of 3D printing
The content of continuous fiber and the length of fiber.
The printed material of the receptive cavity inner cavity use continuous fiber composite reinforcing material flexible, including silicon rubber,
Thermoplastic polyurethane rubber or thermoplastic elastomer (TPE)；The printed material for receiving chamber enclosure uses continuous fiber reinforced composite materials,
Including fibre reinforced ABS resin composite material, carbon fiber enhancement polylactic acid composite material, carbon fiber reinforced nylon composite wood
Material, fibre reinforced ASA composite material, fibre reinforced PETG composite material, glass fiber reinforced ABS resin composite material,
Glass fiber reinforced polylactic acid composite material, glass fibre reinforced nylon composite material, glass fiber reinforcement ASA composite material or
Glass fiber reinforcement PETG composite material.
Compared with prior art, the present invention has following advantage:
1) receptive cavity that the present invention designs is prepared using the 3D printing of continuous fiber reinforced composite materials, is increased using fiber
The mechanical property of strong composite material, greatly improves the intensity of receptive cavity, while alleviating weight.
2) receptive cavity that designs of the present invention is using flexible design, improves user and prosthetic socket contact portion stump
Comfort level, making the elasticity modulus of the material of the receptive cavity axial, radial all has a change of gradient, in amputee's donning process
Muscle can be mutually adapted with receptive cavity, improve the wearing comfort of artificial limb.
3) with shell using integrated printing, integration is printed with to be conducive to improve and connect for the inner cavity for the receptive cavity that the present invention designs
By intracavitary chamber and the degree of agreement for receiving chamber enclosure, increase the comfort level of prosthetic wearing, shortens preparation flow and time, drop significantly
Low manufacturing cost.
Detailed description of the invention
Fig. 1 is the structure chart for the prosthetic socket that the embodiment of the present invention proposes, (1) is receptive cavity inner cavity, and (2) are receptive cavity
Shell.
Fig. 2 is the elasticity modulus distribution schematic diagram for the prosthetic socket that the embodiment of the present invention proposes, in which: Fig. 2 (a) is to connect
By the elasticity modulus distribution schematic diagram of chamber axial direction, Fig. 2 (b) is the radial elasticity modulus distribution schematic diagram of receptive cavity Section A-A.
Specific embodiment
The present invention is described in detail with embodiment with reference to the accompanying drawings of the specification, and the present embodiment is with skill of the present invention
Implemented under premised on art scheme, but protection scope of the present invention is not limited to following embodiments.
As shown in Figure 1, being the structure chart of prosthetic socket proposed by the present invention, including outside receptive cavity inner cavity 1 and receptive cavity
Shell 2；Prosthetic socket inner cavity 1 uses 3D printer one printing shaping with chamber enclosure 2 is received.The printing material of receptive cavity inner cavity 1
Material uses thermoplastic polyurethane rubber；Receive the printed material of chamber enclosure 2 using carbon fiber enhancement polylactic acid composite material.
The mechanical performance data and difference of material under the conditions of measurement different materials crystallinity are tested according to fused glass pellet
The mechanical performance data of the continuous fiber reinforced composite materials of fiber content is established material mechanical performance and is contained with crystallinity and fiber
The elasticity modulus distribution shifts of receptive cavity different zones are the identifiable crystallinity of 3D printing equipment and fibre by the mapping relations of amount
Dimension hplc data information.By adjusting the printing baseplate temp of 3D printer, 3D printer nozzle temperature and for 3D printing
The content of continuous fiber and the length of fiber are added in continuous fiber reinforced composite materials, are finally completed flexible prosthetic socket
Processing and manufacturing.
Receptive cavity requires the high area distribution of elasticity modulus to be connect with connector receiving chamber enclosure, receptive cavity axial direction bottom end
Position and receive chamber enclosure stress concentration portion position, these regions using continuous carbon fibre enhancing lactic acid composite material printing,
Wherein carbon fiber content is about 27%, and as shown in Fig. 2 (a) and Fig. 2 (b), the elasticity modulus of receptive cavity reaches E at this timemax,
Middle bending strength is 263MPa, bending modulus 13.3GPa, tensile strength 256MPa, stretch modulus 20.6Gpa.With skin
The inner wall elasticity modulus of the receptive cavity inner cavity directly contacted is lower, this part is formed by thermoplastic polyurethane rubber 3D printing, such as
Shown in Fig. 2 (a) and Fig. 2 (b), elasticity modulus is minimum Emin, about 10MPa.The elasticity modulus of the outer wall of receptive cavity inner cavity
Between Emin~EmaxBetween, this part enhances lactic acid composite material using chopped carbon fiber, bending strength between 110~
Between 260MPa, bending modulus is between 3~10GPa, and tensile strength is between 60~200MPa, and stretch modulus is between 4
Between~10Gpa.Receptive cavity remaining area is from low elastic modulus to high elastic modulus gradual transition, i.e. elasticity modulus of materials step by step
From the top of receptive cavity axial direction to bottom end, radial inside to outside change of gradient.As shown in Fig. 2, from the top of receptive cavity axial direction
It holds to bottom end, radial inside to outside receives the elasticity modulus of cavity material from Emin~EmaxChange of gradient.Elasticity shown in Fig. 2
Modulus gradient variation is 3 grades, and specific product is not limited to 3 grades of variations, and elasticity modulus can be many grades and gradually change.
The mechanical performance data that material under the conditions of measurement different materials crystallinity is tested according to fused glass pellet, establishes material
The modulus distribution shifts of receptive cavity different zones are that 3D printing equipment can recognize by the mathematical relationship for expecting mechanical property and crystallinity
Crystallinity data information.By adjusting printer working chamber temperature, printing baseplate temp, the 3D printer of 3D printer
Nozzle temperature, to print the product of different crystallinity.The crystallinity of printed product is higher, and elasticity modulus is higher.It is finally completed soft
The processing and manufacturing of property receptive cavity.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, all to manage in design of the invention
It reads within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of 3D printing flexibility receptive cavity with adaptivity, including receptive cavity inner cavity (1) and receive chamber enclosure (2),
It is characterized in that: the receptive cavity inner cavity (1) and receiving chamber enclosure (2) and be integrally formed using 3D printing, printed material is continuous fine
Dimension enhancing composite material；The receptive cavity has flexibility, makes the elasticity modulus of the material of the receptive cavity respectively axial, radial
Gradient is variable, and the elasticity modulus for making the material of the receptive cavity is controlled by crystallinity in 3D printing and fiber content, by adjusting
3D printing technological parameter, processing prepare the receptive cavity for having elasticity modulus change of gradient and can be adaptive；
Receptive cavity require the high area distribution of elasticity modulus receptive cavity inner cavity outer wall with receive the connecting portion of chamber enclosure, connect
By chamber axial direction bottom end and connector connecting portion and receive chamber enclosure stress concentration portion position, and receiving in direct contact with the skin
The inner wall elasticity modulus of intracavitary chamber is low, and receptive cavity remaining area is from low elastic modulus to high elastic modulus gradual transition step by step, i.e.,
Elasticity modulus of materials is from the top of receptive cavity axial direction to bottom end, radial inside to outside change of gradient, variation range 6MPa-
Between 21GPa；
The elasticity modulus of the 3D printing product of the continuous fiber reinforced composite materials and the fibre of continuous fiber reinforced composite materials
The mapping relations of dimension hplc include: in continuous fiber reinforced composite materials fibre composition proportion and continuous fiber reinforcement it is compound
In the mapping relations and continuous fiber reinforced composite materials of the elasticity modulus of the 3D printing product of material institute's fibre-bearing length with
The elasticity modulus mapping relations of the 3D printing product of continuous fiber reinforced composite materials；Fiber in continuous fiber reinforced composite materials
The stretching of the 3D printing product of content and continuous fiber reinforced composite materials, bending modulus are in being positively correlated property of a certain range；It is long
Fibre reinforced composites enhance the stretching of its 3D printing product, bending modulus, and short fiber reinforced composite enhances its 3D and beats
Print the shear strength of product.
2. a kind of 3D printing flexibility receptive cavity with adaptivity according to claim 1, it is characterised in that: receptive cavity
The elasticity modulus of different zones is distributed that need to follow continuous fiber reinforcement to the identifiable data information conversion of 3D printing equipment compound
The elasticity modulus and continuous fiber reinforced composite materials crystallinity and continuous fiber reinforced composite materials of the 3D printing product of material
The mapping relations of fiber content, according to the experiment number of the mechanical property of the material under different crystallinity and under different fiber contents
According to the mapping relations of realization elasticity modulus of materials and crystallinity and fiber content；The elasticity modulus for receiving cavity material simultaneously also can
Enough surface skin situations and actual loading according to deformed limb carry out local regulation.
3. a kind of 3D printing flexibility receptive cavity with adaptivity according to claim 1, it is characterised in that: the receiving
Chamber is prepared using the 3D printing technique bonded composite fiber placement of fused glass pellet.
4. a kind of 3D printing flexibility receptive cavity with adaptivity according to claim 1, it is characterised in that: realize bullet
Property modulus gradient variation adjustable process parameters include: 3D printer working chamber temperature, the printing baseplate temp of 3D printer,
3D printer nozzle temperature and in the continuous fiber reinforced composite materials of 3D printing add continuous fiber content and fiber
Length.
5. a kind of 3D printing flexibility receptive cavity with adaptivity according to claim 1, it is characterised in that: receptive cavity
The printed material of inner cavity (1) uses continuous fiber composite reinforcing material flexible, including silicon rubber or thermoplastic polyurethane rubber；
Receive the printed material of chamber enclosure (2) using continuous fiber reinforced composite materials, including fibre reinforced ABS resin composite wood
Material, carbon fiber enhancement polylactic acid composite material, carbon fiber reinforced nylon composite material, fibre reinforced ASA composite material, carbon fiber
Tie up REINFORCED PET G composite material, glass fiber reinforced ABS resin composite material, glass fiber reinforced polylactic acid composite material, glass
Glass fiber reinforced nylon composite material, glass fiber reinforcement ASA composite material or glass fiber reinforcement PETG composite material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810115628.4A CN108451676B (en) | 2018-02-02 | 2018-02-02 | A kind of 3D printing flexibility receptive cavity with adaptivity |
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| CN201810115628.4A CN108451676B (en) | 2018-02-02 | 2018-02-02 | A kind of 3D printing flexibility receptive cavity with adaptivity |
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| CN108451676B true CN108451676B (en) | 2019-11-26 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109717991B (en) * | 2018-12-27 | 2021-06-08 | 国家康复辅具研究中心 | Artificial limb socket with deformation regulation function and 4D printing forming method thereof |
| CN109549764B (en) * | 2019-01-16 | 2019-10-11 | 西安交通大学 | A kind of preparation method of the receptive cavity for artificial leg |
| CN110406107A (en) * | 2019-06-05 | 2019-11-05 | 广州市康义博假肢矫形技术有限公司 | A kind of artifucial limb receptive cavity design method, system, electronic equipment and storage medium based on 3D printing |
| CZ309618B6 (en) * | 2019-08-20 | 2023-05-24 | ING corporation, spol. s r.o | A 3D printed prosthetic bed for an amputation stump |
| US20210145613A1 (en) * | 2019-11-18 | 2021-05-20 | Otto Bock Healthcare Lp | 3d printed prosthetic liners and sockets |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007035409B4 (en) * | 2007-07-26 | 2010-06-02 | Otto Bock Healthcare Gmbh | Orthopedic interface |
| US8114167B2 (en) * | 2009-06-03 | 2012-02-14 | Carl Caspers Consulting Llc | Dynamically activated variable response socket technology |
| WO2013006582A1 (en) * | 2011-07-01 | 2013-01-10 | Orthocare Innovations Llc | Equilibrium socket system |
| CN105287064A (en) * | 2015-10-21 | 2016-02-03 | 青岛尤尼科技有限公司 | Prosthetic socket and 3D printing preparation method thereof |
| US10517746B2 (en) * | 2016-03-21 | 2019-12-31 | Comfort Products, Inc. | Air control system for enhancing a connection between a limb liner and a limb prosthesis |
| CN106667629B (en) * | 2017-02-06 | 2018-04-13 | 国家康复辅具研究中心 | Bionical thing sucker, the prosthetic socket of open architecture |
| CN107433713B (en) * | 2017-09-04 | 2019-04-23 | 西安交通大学 | A kind of function controlling structure preparation method for answering material 3D printing based on continuous fiber |
| CN208552142U (en) * | 2017-12-09 | 2019-03-01 | 湖南华翔增量制造股份有限公司 | A kind of 3D printing hard frame type soft receiving cavity |
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