CN112706345B - Inner liner forming device and inner liner forming process - Google Patents
Inner liner forming device and inner liner forming process Download PDFInfo
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- CN112706345B CN112706345B CN202011438092.3A CN202011438092A CN112706345B CN 112706345 B CN112706345 B CN 112706345B CN 202011438092 A CN202011438092 A CN 202011438092A CN 112706345 B CN112706345 B CN 112706345B
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- inner liner
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- filling
- outer bag
- forming device
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 41
- 239000002994 raw material Substances 0.000 claims abstract description 35
- 239000004033 plastic Substances 0.000 claims abstract description 13
- 229920003023 plastic Polymers 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 238000010146 3D printing Methods 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000004519 grease Substances 0.000 claims description 6
- 239000000741 silica gel Substances 0.000 claims description 6
- 229910002027 silica gel Inorganic materials 0.000 claims description 6
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 claims 1
- 229910052602 gypsum Inorganic materials 0.000 abstract description 23
- 239000010440 gypsum Substances 0.000 abstract description 23
- 238000004519 manufacturing process Methods 0.000 abstract description 23
- 238000000465 moulding Methods 0.000 description 10
- 239000011505 plaster Substances 0.000 description 6
- 206010003694 Atrophy Diseases 0.000 description 4
- 230000037444 atrophy Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
-
- 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
- A61F2/7812—Interface cushioning members placed between the limb stump and the socket, e.g. bandages or stockings for the limb stump
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
-
- 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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
-
- 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
- A61F2/7812—Interface cushioning members placed between the limb stump and the socket, e.g. bandages or stockings for the limb stump
- A61F2002/785—Pads, e.g. relief pads
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Transplantation (AREA)
- Vascular Medicine (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Optics & Photonics (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 an inner bushing forming device which comprises an outer bag body and a base, wherein the outer bag body is made of an elastic plastic material which is easy to deform, the bottom of the outer bag body is fixedly connected to the base in the circumferential direction, a filling space which can contain filling materials is formed between the outer bag body and the base, and an openable filling nozzle is arranged at the bottom of the base and is communicated with the filling space. The invention also discloses an inner bushing forming process which comprises the steps of taking the artificial limb receiving cavity, putting the raw materials of the inner bushing into the artificial limb receiving cavity, heating, filling, extruding and forming and cooling and forming. The process is implemented by adopting the inner liner forming device, the inner liner with various shapes can be manufactured by only one set of forming device, and the gypsum mold is not required to be customized according to each different residual limb shape, so that the cost is saved, the environment is protected, and the inner liner is convenient to manufacture and replace for the second time.
Description
Technical Field
The invention relates to the field of artificial limbs, in particular to an inner bushing forming device and an inner bushing forming process using the same.
Background
The prosthetic inner liner is a ligament between the residual limb and the prosthetic socket, which is vital in a prosthetic limb and has the function of fitting into the prosthetic limb and cushioning the stresses. These functions are all accomplished by stimulating the skin and muscle tissue of the stump, which can cause discomfort to the amputee and even injury to the limb if improperly treated.
At present, the forming process of the inner bushing is approximately as follows:
Taking a mould on the residual limb of a patient by adopting a gypsum bandage mode to manufacture a gypsum female mould, wherein the shape of the gypsum female mould is matched with the shape of the residual limb;
Injecting gypsum slurry into the inner cavity of the gypsum female die, solidifying the slurry to obtain a gypsum male die, taking out the gypsum male die, and repairing the gypsum male die, wherein the shape of the gypsum male die is consistent with that of a residual limb;
Rolling the inner lining material into cone-like shape, sleeving the cone-like shape outside the plaster male mold, heating, sealing the inner lining material by using a plastic sleeve, vacuumizing the plastic sleeve to extend and shape the material, completely fitting the material on the plaster male mold, cooling, taking out the finished product of the inner lining, and completely matching the inner cavity of the inner lining with the plaster male mold, namely the shape of the residual limb of a patient.
After the inner liner is manufactured, a prosthetic socket is manufactured according to the shape of the inner liner (the shape of the prosthetic socket is matched with the shape of the inner liner, the prosthetic socket is a shell part of a prosthetic limb), the manufacturing process mainly comprises the steps of sleeving a layer of plastic bag outside the inner liner, filling materials, grouting, sleeving a layer of plastic bag outside the inner liner, and curing to obtain the outer liner prosthetic socket. The inner bushing is placed into the prosthetic socket for use.
In summary, the idea and sequence of the existing artificial limb forming process are approximately that based on the shape of the residual limb, a plaster mold is manufactured firstly, then an inner bushing is manufactured, and finally a receiving cavity is manufactured. However, since the shape of the stump is different from patient to patient and the liner is tailored to the individual condition of the patient, it is determined that a plaster mold is to be matched with each liner, and after the liner is manufactured, the plaster mold needs to be broken and scrapped.
The existing technology has the defects that (1) the gypsum mold is manufactured with cost and extremely occupied space, gypsum is fragile and needs to be carefully stored, (2) each gypsum mold is only required to be scrapped once, so that great waste is caused, the production cost is difficult to compress, the gypsum mold is not environment-friendly and cannot be recycled, (3) the gypsum mold is scrapped, time and labor are consumed, the gypsum mold is crushed, fragments are required to be cleaned and removed, the garbage disposal cost is extremely high, and (4) when a patient needs to replace an inner liner due to the atrophy of a residual limb or the pollution of the inner liner, the gypsum mold is required to be manufactured again, so that the existing technology is extremely troublesome.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide an inner bushing forming device which can solve the problem that a gypsum mold is needed to be adopted for forming an inner bushing in the prior art, and the other purpose of the invention is to provide an inner bushing forming process applied to the inner bushing forming device which can solve the problems that the prior art needs to manufacture the gypsum mold and then manufacture the inner bushing, thereby causing high production cost, high replacement cost, high treatment cost, environmental protection and troublesome process.
The invention is realized by adopting the following technical scheme:
The inner bushing forming device comprises an outer bag body and a base, wherein the outer bag body is made of an elastic plastic material which is easy to deform, the bottom of the outer bag body is fixedly connected to the base in the circumferential direction, a filling space capable of containing filling materials is formed between the outer bag body and the base, an openable filling nozzle is arranged at the bottom of the base, and the filling nozzle is communicated with the filling space.
The inner bushing forming device further comprises an inner bag body and a stretching rope, wherein the inner bag body is made of elastic plastic materials which are easy to deform and is arranged in the outer bag body, a stretching through hole is formed in the base, the bottom of the inner bag body is fixedly connected to the side portion of the stretching through hole in the circumferential direction, the upper surface of the top end of the inner bag body is fixedly connected with the lower surface of the top end of the outer bag body, one end of the stretching rope is fixedly connected with the lower surface of the top end of the inner bag body, and the other end of the stretching rope penetrates through and extends out of the stretching through hole.
Further, the material of the outer bag body is any one of silica gel and rubber.
Further, the material of the inner bag body is any one of silica gel and rubber.
Further, the filling material is any one of air and sand.
The inner liner forming process applied to the inner liner forming device is characterized by comprising the following steps of taking a prosthetic socket, namely manufacturing a new prosthetic socket according to the shape of a residual limb of a patient; or directly taking the existing old prosthetic socket, taking the inner liner raw material according to the thickness and volume requirements of the inner liner, placing the inner liner raw material into the prosthetic socket, heating the inner liner raw material to ensure that the inner liner raw material is heated to have good ductility, filling and extrusion molding, namely placing the inner liner molding device into the prosthetic socket, positioning the inner liner raw material between the prosthetic socket and the inner liner molding device, opening the filling nozzle, filling the inside of the outer bag body, expanding the outer bag body, applying a force on the inner liner raw material by the outer bag body, tightly pressing the inner liner raw material into the prosthetic socket, ensuring that the outer surface of the inner liner is matched with the inner surface of the prosthetic socket, simultaneously ensuring that the inner surface of the inner liner is consistent with the inner surface of the prosthetic socket, opening the filling nozzle to release the filling material, taking out the inner liner molding device, and taking out the inner liner after cooling the inner liner, and taking out the inner liner raw material.
Further, before the filling and extrusion steps, an adjustment step of pulling and fixing the stretching ropes downwards according to the specific size of the residual limb of the patient to reduce the length dimension of the outer bag body, thereby adjusting the size of the filling space to adapt to the specific size of the residual limb of the patient.
The artificial limb receiving cavity is characterized by further comprising a 3D printing step of producing a residual limb contour model through three-dimensional scanning equipment, digitally repairing the residual limb contour three-dimensional model according to the residual limb contour three-dimensional model, establishing an inner surface curved surface sheet three-dimensional model of the artificial limb receiving cavity according to an artificial limb repairing principle and computer auxiliary software, establishing an artificial limb receiving cavity three-dimensional model with solid thickness according to the inner surface curved surface sheet three-dimensional model, and carrying out 3D printing processing molding according to the artificial limb receiving cavity three-dimensional model to obtain a finished product of the artificial limb receiving cavity.
Further, in the heating step, the heating temperature is 60 ℃ to 100 ℃.
Further, the raw material of the inner bushing is any one of EVA, polyurethane, silicone grease and grease.
Compared with the prior art, the invention has the following beneficial effects:
The inner lining forming process adopts a completely different process method from the prior art, firstly, a prosthetic socket is taken, a new prosthetic socket can be manufactured according to the shape of the residual limb of a patient, or an old prosthetic socket (the shape of the prosthetic socket is matched with the shape of the residual limb) which is manufactured can be taken, then the inner lining raw material is put into the prosthetic socket, after the inner lining forming device is heated to a proper temperature, the inner lining forming device is put into the socket for filling, and the outer bag body is inflated. Since the inner liner forming apparatus itself is of an indeterminate shape, the shape of the outer bladder after inflation is limited by the inner surface of the prosthetic socket, which is shaped to conform to the shape of the residual limb. In the process, the outer bag body applies acting force to the raw material of the inner liner, so that the raw material of the inner liner is tightly attached to the inner surface of the prosthetic socket, the shape of the outer surface of the inner liner is matched with the shape of the inner surface of the prosthetic socket due to good ductility of the heated raw material of the inner liner, meanwhile, the shape of the inner surface of the inner liner is the same as the shape of the inner surface of the prosthetic socket, and the inner liner is just matched with the shape of a residual limb, and a finished product of the inner liner is obtained after molding.
In the whole process flow, the forming device plays a role in shaping the inner bushing. Because the forming device is made of elastic plastic materials which are easy to deform, the forming device is inflated by filling, and can adapt to prosthetic sockets of any shape because of no definite shape of the forming device, so that the forming of the raw material of the inner lining is realized.
The process is implemented by adopting the inner liner forming device, the inner liner forming device can be suitable for manufacturing inner liners with various shapes only by one set of forming device, the gypsum mold is not required to be customized according to each different residual limb shape, the high manufacturing cost, transportation cost, storage cost, scrapping cost and cleaning cost of the conventional gypsum mold are directly saved, the waste is reduced, the manufacturing cost of the inner liner is greatly reduced, and the production efficiency and the production benefit are greatly improved. In addition, when the patient needs to replace the inner lining due to the reasons of stump atrophy or the inner lining being stained and the like, the forming device and the forming process can facilitate the secondary manufacturing of the inner lining without additionally opening a die, thereby bringing great convenience to the patient.
Drawings
FIG. 1 is a front cross-sectional view of an inner liner forming apparatus;
FIG. 2 is a side cross-sectional view of an inner liner forming apparatus;
FIG. 3 is a cross-sectional view of the inner liner forming apparatus in a stretch adjusted condition;
Fig. 4 is a flow chart showing the process of forming the inner liner.
In the figure, 10 parts of an outer bag body, 20 parts of a base, 21 parts of a stretching through hole, 30 parts of a filling space, 40 parts of a filling nozzle, 50 parts of an inner bag body, and 60 parts of a stretching rope.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
Referring to fig. 1-3, the present invention discloses an inner liner forming apparatus, which includes an outer bladder 10 and a base 20. The outer bag body 10 is made of elastic plastic material which is easy to deform, the bottom of the outer bag body 10 is fixedly connected to the base 20 in a circumferential direction, more specifically, the bottom of the outer bag body 10 is sleeved outside the base 20, a filling space 30 which can contain filling materials is formed between the outer bag body 10 and the base 20, a filling nozzle 40 which can be freely opened and closed is formed at the bottom of the base 20, one end of the filling nozzle 40 is communicated with the filling space 30, and the other end of the filling nozzle extends out of the lower part of the base 20. When there is no content in the filling space 30, the outer bag 10 is collapsed, and when the filling material is injected into the filling space 30 through the filling nozzle 40, the outer bag 10 is inflated, and its specific shape is changed according to external restrictions. For example, when the molding device is placed in a hemispherical prosthetic socket, inflation occurs after filling, the outer capsule 10 having good plasticity is limited by the hemispherical shape, and the outer capsule 10 is adapted to form a hemispherical shape, and other shapes are similar.
Preferably, the inner liner forming apparatus further includes an inner bladder 50 and a tensile cord 60. The inner bag body 50 is made of elastic plastic material which is easy to deform, is arranged in the outer bag body 10, a stretching through hole 21 is further formed in the base 20, and the bottom of the inner bag body 50 is fixedly connected to the side part of the stretching through hole 21 in the circumferential direction. The upper surface of the top end of the inner bladder 50 and the lower surface of the top end of the outer bladder 10 are fixedly connected, and it should be noted that the inner bladder 50 and the outer bladder 10 are fixedly connected only through one end point, but not the whole outer surface of the inner bladder 50 and the whole inner surface of the outer bladder 10 are completely bonded. One end of the stretching wire 60 is fixedly connected with the lower surface of the top end of the inner bag body 50, and the other end extends out of the stretching through hole 21.
In the case of the inner balloon 50, the filling space 30 is actually the size of the cavity formed between the inner balloon 50 and the outer balloon 10. When the stretching rope 60 is pulled downwards, the inner bag body 50 drives the top end of the outer bag body 10 to move downwards, and the stretching rope 60 is fixed again, which is equivalent to the compression of the filling space 30, and the size adjustment of the forming device is realized through the stretching rope 60 and the inner bag body 50.
Preferably, the material of the outer bladder 10 may be any one of silica gel and rubber, or may be any other known material having good heat resistance and elastoplasticity, and preferably, the material of the inner bladder 50 may be any one of silica gel and rubber, or may be any other known material having good heat resistance and elastoplasticity.
Preferably, the filling material can be any one of air and sand, and can also be other known materials with strong plasticity and easy filling. In the invention, the filling material is preferably air, and the air is directly injected into or discharged from the outer bag body 10, so that the invention has the advantages of convenience, rapidness and cost saving.
Specifically, the filling nozzle 40 is embodied as a valve, which communicates with the filling space 30.
The invention also discloses an inner bushing forming process applied to the inner bushing forming device, referring to fig. 4, at least comprising the following steps:
The step of taking the artificial limb socket, namely, manufacturing a new artificial limb socket according to the shape of the residual limb of a patient, or directly taking an existing old artificial limb socket, specifically, manufacturing the new artificial limb socket for the patient by adopting the existing method, or directly taking the old artificial limb socket for the patient in use, and putting the old artificial limb socket into an inner lining raw material, namely, taking the inner lining raw material according to the thickness and volume requirements required by the inner lining, putting the inner lining raw material into the artificial limb socket, and more specifically, when the inner lining raw material is put, better pressing the inner lining raw material against the inner surface of the artificial limb socket so as to facilitate the subsequent extrusion molding;
a pressurizing step, namely heating the raw material of the inner bushing to heat the raw material of the inner bushing so as to have good ductility;
Filling and extrusion molding, namely discharging the filling material in the inner bushing forming device, placing the inner bushing forming device into the artificial limb receiving cavity, and positioning the inner bushing raw material between the artificial limb receiving cavity and the inner bushing forming device, opening a filling nozzle 40 to fill the inside of the outer bag body 10, so that the outer bag body 10 is inflated, the inflated outer bag body 10 applies acting force to the inner bushing raw material and tightly presses the inner bushing raw material on the inner surface of the artificial limb receiving cavity;
And a cooling molding step, namely opening the filling nozzle 40 to drain the filling material, taking out the inner liner molding device, obtaining a finished product of the inner liner after the raw material of the inner liner is cooled and molded, and taking out the finished product of the inner liner.
The technological process of the present invention includes the technological process of forming inner lining, including the first making artificial limb socket, the subsequent making artificial limb socket with the shape corresponding to the residual limb of the patient, the subsequent setting inner lining material inside the artificial limb socket, heating to proper temperature, and filling the inner lining forming device inside the socket to expand the outer bag 10. Since the inner liner forming apparatus itself is of an indeterminate shape, the shape of the outer bladder 10 after inflation is limited by the inner surface of the prosthetic socket, which is shaped to conform to the shape of the residual limb. In this process, the outer bladder 10 applies a force to the inner liner material to cause the inner liner material to conform closely to the inner surface of the prosthetic socket, and because of the good ductility of the heated inner liner material, the outer surface shape of the inner liner matches the shape of the inner surface of the prosthetic socket, and the inner surface shape of the inner liner is the same as the shape of the inner surface of the prosthetic socket, and is also exactly the shape matching the shape of the stump, and the finished inner liner is obtained after molding.
In the whole process flow, the forming device plays a role in shaping the inner bushing. Because the forming device is made of elastic plastic materials which are easy to deform, the forming device is inflated by filling, and can adapt to prosthetic sockets of any shape because of no definite shape of the forming device, so that the forming of the raw material of the inner lining is realized.
The process is implemented by adopting the inner liner forming device, the inner liner forming device can be suitable for manufacturing inner liners with various shapes only by one set of forming device, the gypsum mold is not required to be customized according to each different residual limb shape, the high manufacturing cost, transportation cost, storage cost, scrapping cost and cleaning cost of the conventional gypsum mold are directly saved, the waste is reduced, the manufacturing cost of the inner liner is greatly reduced, and the production efficiency and the production benefit are greatly improved. In addition, when the patient needs to replace the inner lining due to the reasons of stump atrophy or the inner lining being stained and the like, the forming device and the forming process can facilitate the secondary manufacturing of the inner lining without additionally opening a die, thereby bringing great convenience to the patient.
Preferably, an adjustment step may also be included before the filling and shaping steps.
The stump of the patient is easy to shrink gradually along with the time, the stump shape is changed, the stump shape is not attached to the inner lining gradually, the thickness of the inner lining is required to be increased, the inner lining needs to be replaced, in addition, after the usage time is long, the inner lining is easy to absorb sweat, the sanitation condition of the inner lining is not ideal, or the inner lining needs to be replaced when the inner lining is polluted by other factors. The new liner must match the new stump shape and therefore its size needs to be adjusted to the latest stump size of the patient when the liner is manufactured for a second time.
The adjustment step is to pull down and fix the stretching string 60 according to the specific size of the patient's residual limb, so that the length dimension of the outer bag body 10 is reduced (the outer bag body 10 can also realize inflation after filling), thereby adjusting the size of the filling space 30 to adapt to the specific size of the patient's residual limb. Specifically, by pulling the tensile cord to reduce the fill space 30, the thickness of the liner can be increased to accommodate the size of the stump after atrophy of the patient.
Preferably, the prosthetic socket manufacturing step comprises the steps of 3D printing, producing a residual limb contour model through three-dimensional scanning equipment, digitally repairing the residual limb contour three-dimensional model according to a prosthetic limb repairing principle and computer-aided software, establishing an inner surface curved surface sheet three-dimensional model of the prosthetic socket, establishing a prosthetic socket three-dimensional model with solid thickness according to the inner surface curved surface sheet three-dimensional model, and carrying out 3D printing and processing molding according to the prosthetic socket three-dimensional model to obtain a finished product of the prosthetic socket.
In the field of prosthesis making, three-dimensional scanning and 3D printing methods are known techniques, and reference is specifically made to the chinese invention of application number CN 201910485877.7.
Preferably, in the heating step, the heating temperature is preferably 60 ℃ to 100 ℃.
Preferably, the raw material of the inner bushing adopts any one of EVA, polyurethane, silicone grease and grease.
Preferably, in the filling step, the filling material is selected from air, the filling nozzle 40 is opened, and the filling nozzle 40 is pressurized and inflated.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (4)
1. The inner bushing forming device is characterized by comprising an outer bag body and a base, wherein the outer bag body is made of an elastic plastic material which is easy to deform, the bottom of the outer bag body is fixedly connected to the base in a circumferential direction, a filling space capable of containing filling materials is formed between the outer bag body and the base, and an openable filling nozzle is arranged at the bottom of the base and is communicated with the filling space;
The inner bushing forming device further comprises an inner bag body and a stretching rope, wherein the inner bag body is made of elastic plastic materials which are easy to deform, is arranged in the outer bag body, is also provided with a stretching through hole, and is circumferentially and fixedly connected with the side part of the stretching through hole;
The material of the inner bag body is any one of silica gel and rubber;
The material of the outer bag body is any one of silica gel and rubber;
the filling material is any one of air and sand;
The inner liner forming process of the inner liner forming device comprises the steps of taking a prosthetic socket, taking an inner liner raw material, heating the inner liner raw material to enable the inner liner raw material to be heated so as to have good ductility, filling and extruding the inner liner forming device, placing the inner liner forming device into the prosthetic socket, enabling the inner liner raw material to be located between the prosthetic socket and the inner liner forming device, opening the filling nozzle, filling the inside of the outer bag body, expanding the outer bag body, applying acting force to the inner liner raw material by the outer bag body, pressing the inner liner raw material into the prosthetic socket according to the thickness and the volume required by the inner liner, enabling the outer surface of the inner liner to be matched with the inner surface of the prosthetic socket, simultaneously enabling the inner surface of the inner liner to be heated to have good ductility, cooling the inner liner raw material after the inner liner is taken out, and cooling the inner liner forming device is taken out, and the inner liner is cooled after the inner liner forming device is taken out;
The artificial limb receiving cavity taking step is a 3D printing step, wherein a residual limb contour model is produced through three-dimensional scanning equipment, the residual limb contour three-dimensional model is digitally modified according to an artificial limb modification principle and computer-aided software, an inner surface curved surface sheet three-dimensional model of the artificial limb receiving cavity is built, an artificial limb receiving cavity three-dimensional model with solid thickness is built according to the inner surface curved surface sheet three-dimensional model, and 3D printing processing and forming are carried out according to the artificial limb receiving cavity three-dimensional model, so that a finished product of the artificial limb receiving cavity is obtained.
2. The inner liner forming apparatus of claim 1, further comprising, prior to said filling and compression forming steps, an adjustment step of pulling and securing said tensile cord downwardly to reduce the length dimension of said outer bladder to adjust the size of said filling space to accommodate the specific size of said patient's stump.
3. The inner liner forming apparatus according to claim 1, wherein in the heating step, a heating temperature is 60 ℃ to 100 ℃.
4. The apparatus for forming an inner liner according to claim 1, wherein the inner liner material is any one of EVA, polyurethane, silicone grease, and grease.
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| CN202011438092.3A CN112706345B (en) | 2020-12-07 | 2020-12-07 | Inner liner forming device and inner liner forming process |
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| CN202011438092.3A CN112706345B (en) | 2020-12-07 | 2020-12-07 | Inner liner forming device and inner liner forming process |
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