WO2004098864A1 - 形状記憶ポリマーの塑性加工方法、締結体および形状記憶ポリマー構成物の製造方法 - Google Patents
形状記憶ポリマーの塑性加工方法、締結体および形状記憶ポリマー構成物の製造方法 Download PDFInfo
- Publication number
- WO2004098864A1 WO2004098864A1 PCT/JP2003/005723 JP0305723W WO2004098864A1 WO 2004098864 A1 WO2004098864 A1 WO 2004098864A1 JP 0305723 W JP0305723 W JP 0305723W WO 2004098864 A1 WO2004098864 A1 WO 2004098864A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shape memory
- memory polymer
- fastening
- polyurethane
- fastener
- Prior art date
Links
- 229920000431 shape-memory polymer Polymers 0.000 title claims abstract description 134
- 238000000034 method Methods 0.000 title claims description 83
- 238000004519 manufacturing process Methods 0.000 title claims description 30
- 230000006870 function Effects 0.000 claims abstract description 74
- 229920003023 plastic Polymers 0.000 claims abstract description 70
- 239000004033 plastic Substances 0.000 claims abstract description 70
- 239000004814 polyurethane Substances 0.000 claims abstract description 62
- 229920002635 polyurethane Polymers 0.000 claims abstract description 61
- 238000010438 heat treatment Methods 0.000 claims abstract description 58
- 238000007493 shaping process Methods 0.000 claims abstract description 41
- 230000009477 glass transition Effects 0.000 claims abstract description 26
- 238000005096 rolling process Methods 0.000 claims description 89
- 239000000463 material Substances 0.000 claims description 55
- 229920000642 polymer Polymers 0.000 claims description 32
- 238000001816 cooling Methods 0.000 claims description 22
- 238000000465 moulding Methods 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 15
- 238000003672 processing method Methods 0.000 claims description 13
- 230000013011 mating Effects 0.000 claims description 8
- 238000003754 machining Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- 230000001747 exhibiting effect Effects 0.000 claims 1
- 238000011084 recovery Methods 0.000 description 26
- 238000000354 decomposition reaction Methods 0.000 description 15
- 239000002184 metal Substances 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 15
- 238000010586 diagram Methods 0.000 description 12
- 238000005979 thermal decomposition reaction Methods 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 239000012781 shape memory material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000000112 cooling gas Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- 229910004337 Ti-Ni Inorganic materials 0.000 description 1
- 229910011209 Ti—Ni Inorganic materials 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical compound [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000013102 re-test Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000003190 viscoelastic substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/0029—Cold deforming of thermoplastics material
-
- 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
- B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
- B29C61/06—Making preforms having internal stresses, e.g. plastic memory
- B29C61/0608—Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/66—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/76—Making non-permanent or releasable joints
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
- B29C66/474—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
- B29C66/7371—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
- B29C66/73715—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable heat-shrinkable
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2/00—Friction-grip releasable fastenings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2001/00—Articles provided with screw threads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/77—Use of a shape-memory material
Definitions
- the present invention relates to a method for plastically processing a polyurethane-based shape memory polymer, a fastener, and a method for producing a polyurethane-based shape memory polymer composition.
- BACKGROUND ART Electronic devices, home appliances and other electrical appliances and mechanical products are made up of many parts, and are assembled with many fastening parts such as screws and rivets. However, the cost of disassembling these products is a major issue in order to ⁇ recycle and use resources effectively. If a fastener made of a shape memory material (such as an alloy and a polymer) is used, it is basically possible to change the shape at a certain temperature and eliminate the fastening force. Disassembly It is very good as a fastener for products that are assumed to be recycled. Therefore, realization of a fastener based on such a thermal decomposition concept has been desired.
- polymers when comparing alloys and polymers, polymers have overwhelmingly large shape recovery properties. For alloys, the value is usually less than 10%, but for polymers, it can be more than 100%. It is also overwhelmingly advantageous in terms of cost. Typical Ti-Ni alloys, which are typical shape memory alloys, cost a few hundred thousand yen Z kg, whereas shape memory polymers are generally cheap at 5,000 yen Z kg. As described above, the shape memory polymer is excellent in shape recovery characteristics, so that it has a large degree of freedom in design, and because of its low cost, it is overwhelmingly advantageous when replacing existing fasteners. Therefore, the present inventors selected a shape memory polymer as a material for such a reason, and examined application to a fastening body.
- the method of molding a shape memory polymer is generally injection molding, extrusion molding, casting molding, blow molding, etc., and the desired shape can be molded and memorized by these techniques (primary shaping or primary molding).
- the polymer In order to perform deformation from this state, the polymer is heated to the glass transition temperature Tg or higher to transition the polymer to the rubber region. Once it ’s in the rubber state, it ’s easy to deform It is possible to fix the shape by cooling to Tg or less while maintaining the deformed state. Normally, a new shape is added to the primary shape in this way (secondary shape or secondary molding).
- the molded product after secondary shaping is only kept in its deformed state by the reversible phase (soft segment) that is temporarily forcibly fixed, so if it is heated again to Tg or more, it will become rubbery.
- the memory shape (the shape of the primary shaping) can be restored.
- this secondary shaping method in which plastic deformation is applied after heating and the shape is fixed by cooling (heating molding ⁇ cooling and fixing method), takes a long time because a heat cycle of heating and cooling is required.
- This method was low in productivity and costly, and was not used for mass production. Therefore, the inventors of the present invention have proposed a method in which the productivity is inferior, but the molding accuracy is relatively high.
- the processing method has been considered as a secondary shaping method.
- shape memory polymer is a viscoelastic material, so its plastic deformability is smaller than that of metal.In addition, cold plastic working itself is very difficult because deformation easily causes whitening and embrittlement. It was expected to be true.
- This forming method is a method of transferring the shape engraved on a die by rolling the rolled material between multiple (usually two) dies, and is used in the manufacture of screws, which are typical fasteners .
- This rolling method has a high rolling speed.
- the production speed (equivalent to the stroke speed of the dies) using a flat die (plate die) rolling machine is usually 100 to
- the rolling speed of the material at this time (the speed of the outer periphery of the material rolling) is about 20 to 80 cni / sec for a ⁇ 6 class screw according to JIS.
- the rolling speed of polymers For example, in the case of polypropylene, threads are not formed at an extremely low speed, and a rolling speed of preferably about 20 cm / sec or more is required.
- the shape recovery characteristics, cost, molding method, etc. are all considered for fasteners that have temperature-dependent fastening force using shape memory material that recovers shape at a certain temperature.
- shape memory material that recovers shape at a certain temperature.
- there is no specific material that can be used practically in this regard and there has been no highly productive secondary shaping method even if a shape memory polymer is selected in terms of shape recovery and material cost. . Therefore, a fastener that has sufficient fastening force at room temperature but loses the fastening force at or above the glass transition temperature Tg has not yet been realized. That is a big challenge there were.
- the present invention has been made to solve such a problem, and an object of the present invention is to realize a fastener having a sufficient fastening force at room temperature, but losing the fastening force at a glass transition temperature Tg or higher.
- a shape memory polymer suitable for such a fastener is selected.
- a new forming method using heat molding as a secondary shaping method and a cooling and fixing method has been developed. It is to emit.
- Another object is to provide a realistic fastening part and a disassembly method using these materials and processing methods. Regarding the latter, the following issues can be further considered.
- the present invention relates to plastic working of a polyurethane-based shape memory polymer
- the present invention also relates to a fastener comprising a shape memory polymer, wherein a part or all of the fastener comprises a polyurethane shape memory polymer, and the polyurethane shape memory polymer portion exhibits a fastening function.
- the fastener has at least one shape selected from the group consisting of a part, a concave part, a concave and convex part, a screw part, and an inclined part.
- the present invention provides a fastening body made of a shape memory polymer, which has at least one shape selected from the group consisting of a convex portion, a concave portion, an uneven portion, a screw portion, and an inclined portion, which exhibits a fastening function.
- the present invention also relates to a method for producing a shape memory polymer composition partly or wholly constituted by a polyurethane-based shape memory polymer, wherein a part or all of the method is constituted by a polyurethane-based shape memory polymer.
- a shape memory polymer construct Preparing a shape memory polymer construct; and subjecting a portion of the shape memory polymer construct, which is constituted by the polyurethane-based shape memory polymer, to plastic working at a strain rate of 14 se G- 1 or less. And a plastic working step.
- the present invention also relates to a fastening body partially or entirely made of a polyurethane-based shape memory polymer, comprising a fastening function portion formed by plastic working on the polyurethane-based shape memory polymer portion, and
- the functional part is a fastening body whose fastening function disappears when heated to a temperature equal to or higher than the glass transition temperature of the polyurethane-based shape memory polymer.
- FIG. 1 is a conceptual diagram showing a fastening state (room temperature state) and a state after heating of a fastener according to an embodiment of the present invention.
- FIG. 2 is a characteristic diagram showing the dependence of the screw outer diameter on the rolling speed.
- FIG. 3 is a characteristic diagram showing the strain rate dependence of the screw outer diameter.
- FIG. 4 is a characteristic diagram showing the dependence of the screw outer diameter on the rolling temperature.
- FIG. 5 is an explanatory diagram for explaining an example of a manufacturing apparatus used in the manufacturing method of the present invention.
- FIG. 6 is an explanatory diagram for explaining the shape of the male screw and the shape after recovery of the heated shape in the embodiment of the fastener according to the embodiment of the present invention.
- FIG. 7 is an explanatory view showing a structure of an embodiment in which the fastening body of the present invention is applied to a screw component and an operation after heating.
- FIG. 8 is an explanatory view showing the structure of another embodiment in which the fastening body of the present invention is applied to a screw component and the operation after heating.
- FIG. 9 is an explanatory diagram showing the operation of an embodiment in which the fastening body of the present invention is applied to a screw component.
- FIG. 10 is an explanatory diagram showing the operation of an embodiment in which the fastening body of the present invention is applied to a screw component.
- FIG. 11 is an explanatory view showing the operation of an embodiment in which the fastening body of the present invention is applied to a screw component.
- FIG. 12 is a table showing test results of characteristics of a fastening body of another embodiment of the present invention in a holding state (room temperature state) and a heating state.
- FIG. 13 is an image diagram of a tensile load measurement test.
- FIG. 14 is an explanatory view showing a structure of a fastening body according to another embodiment of the present invention and an operation after heating.
- FIG. 15 is an explanatory view showing a structure of a fastening body according to another embodiment of the present invention and an operation after heating.
- FIG. 16 is an explanatory view showing the structure of a fastener according to another embodiment of the present invention and the operation after heating.
- FIG. 17 is a table showing test results of properties of a fastening body of another embodiment of the present invention in a holding state (room temperature state) and a heating state.
- FIG. 18 is a perspective view of an embodiment in which the fastening body of the present invention is applied to a male screw part.
- FIG. 19 is a perspective view of an embodiment in which the fastening body of the present invention is applied to a female screw part.
- FIG. 20 is a perspective view of an embodiment in which the fastener according to the present invention is applied to a fastener component.
- the shape memory polymer selected by the present inventors is a polyurethane-based shape memory polymer (developed by Mitsubishi Heavy Industries, Ltd., trade name: Diary). It has a shape recovery characteristic of as much as 400%, and its material cost is as low as 3000 yen kg. Also, as described later, since the range of the shape recovery temperature (glass transition temperature Tg) is wider than that of other shape memory polymers, the degree of freedom in setting the decomposition temperature is large, and fasteners with different Tg can be used.
- the main shape memory polymers and their shape recovery temperatures are as follows. (The contents below are for Toray Research Center “Shape (Development of new applications of memory polymers) ”Polyurethane-based shape memory polymer (trade name: Diary): 130 to 120 ° C, styrene-butadiene-based shape memory polymer: 60 to 90 ° C Trans-polyisoprene-based shape memory polymer: 67 ° C, polynorpolene-based: 34 ° C.
- Figure 2 is a graph that clarifies that the manner in which the screw outer diameter is stretched depends on the rolling speed.
- the rolling speed in order to form a thread, the rolling speed must be at least 20 cm / sec or less, and a particularly preferable rolling speed is 5 cm / sec due to formability. It is less than sec.
- Fig. 3 is a graph obtained by applying the uniaxial approximation to the stress-strain characteristics in rolling, and converting the rolling speed in Fig. 2 to the strain speed.
- plastic working must be performed at a strain rate of at least 14 sec " 1 or less, and a particularly preferable condition is a strain rate of 4 sec- 'or less due to formability.
- the processing method of the present invention uses a strain rate of less than Usee- 1 in plastic processing of a polyurethane-based shape memory polymer.
- plastic working is realized by setting the above-mentioned conditions of the strain rate.
- the glass transition temperature of the polymer is defined as Tg
- the present inventors have selected a polyurethane-based shape memory polymer as a specific means for realizing a fastening body that can be easily decomposed by heating, and further, have any shape.
- a new plastic working method for forming has been developed.
- sufficient secondary shaping can be performed by the heat molding and cooling and fixing methods.
- Fig. 1 shows a typical example of a fastener that can be realized by combining these materials and processing methods and has a thermal decomposition function.
- the figure shows a fastener composed of a screw made of a polyurethane-based shape memory polymer and a metal nut, and the left figure in Fig. 1 shows the fitted state at room temperature.
- Male screw and metal nut female formed by secondary shaping and responsible for fastening function Screw is fitted.
- this fastener is heated to Tg or more, the male screw almost completely disappears, the nut comes off, and the disassembly is completed. This state
- the present invention discloses a method for manufacturing such a fastener having a thermal decomposition function and various structures. First, a method and an apparatus for processing a shape memory polymer according to a first embodiment of the present invention will be described.
- Fig. 2 is a graph that clarifies that the method of tensioning the screw outer diameter has a rolling speed dependence.
- the data are based on flat dies (plate dies) and round dies, and were rolled under standard conditions except for changing the rolling speed.
- the rolling speed the speed of the outer periphery of the material rolling
- a particularly preferable rolling speed is 5 cm / sec or less, which can secure about 70% of the maximum amount of plastic deformation and can obtain a sufficient fastening force. This is because plastic deformability depends on strain rate
- This material reflects the fact that, in this material, the plastic deformation ability is improved by reducing the strain rate, and the formability is improved.
- the thread shape, and therefore the die shape, for metric screws specified in JIS show a similar relationship regardless of the thread size, regardless of the size of the thread ( The ratio between the screw outer diameter and the material diameter is about 1.1), but the strain rate is almost determined by the rotation speed. Therefore, assuming that the shaft diameter (blank diameter) of the material (blank material) before processing is d0 in consideration of the screw size, the above-mentioned rolling speed condition is 20 X (d0 / 5.2) cm / It can be rewritten as sec or less, and a particularly preferable condition is 5 x (d0 ⁇ 5.2) cm / sec or less. Therefore, it is necessary to perform machining at a speed that includes these conditions for effective machining. These conditions include the case where the rolling speed is kept at zero.
- FIG. 3 is a graph obtained by converting the rolling speed in FIG. 2 into a strain speed. Assuming that the springback of the material compressed by the dies is sufficiently small and applying the uniaxial deformation approximation, the strain rate is calculated as the rolling speed and the compression speed of the die surface (peak) with respect to the center of the material axis It can be expressed as the following equation (7).
- ⁇ indicates the strain rate
- (r indicates the material radius
- ⁇ indicates the shaft rotation speed)
- the compression speed 2 / was calculated using the angle of the bite portion in the case of a flat die and the approach speed of the die in the case of a round die.
- this condition can be easily applied to rolling work that deviates from standard conditions, and even to plastic working methods other than rolling. Can be very useful.
- the strain rate dependence of the residual strain plastic deformation
- the same tendency as in rolling was obtained. Therefore, this condition can be applied to the plastic working method for this material in general.
- Figure 4 is a graph showing the cooling effect that appears on the screw outer diameter (which is an indicator of the thread formability).
- the glass transition temperature Tg of the shape memory polymer used in the experiment is 55 ° C. From this graph, it can be seen that it is effective to forcibly cool to a temperature lower than room temperature, at least about 10 ° C or less, in order to raise the thread. This is considered to be the result of reducing the amount of springback by utilizing the temperature dependence of the amount of springback that occurs immediately after plastic deformation, in addition to the effect of forcibly removing the heat generated by rolling.
- Tg— (55—10) Tg— Cool below 45 ° C Need to be rejected.
- Particularly preferred conditions are Tg-80 ° C or less, at which 70% of the maximum deformation can be secured. This condition is, of course, applicable to other plastic working methods.
- FIG. 5 is an explanatory diagram of a manufacturing apparatus that realizes this processing method.
- the rolling method using a round die rolling machine is taken up as a processing method, but the rolling device used is a flat die (plate die) rolling machine, a planetary rolling machine, or a female thread rolling machine. It can be a board making machine (tupper).
- the round die rolling method is performed by sandwiching a material 52 (here, a round bar) made of a shape memory polymer between two rotating round dies 51A and 51B, and pressing the die surface. This is a processing method that transfers the shape engraved on the surface.
- the material to be finally processed into the fastening body, including the head is prepared by casting or injection molding.
- a low-speed drive motor must be used, or a gear mechanism must be provided to reduce the speed.
- a gear mechanism is used in consideration of compatibility with high-speed specifications.
- the rotational speed of the die is numerically controlled, but the rolling speed (rolling speed of the material) is preferably 0.96 xd 0 cm / sec or less in view of formability. This is a very low speed compared to the rolling speed of metal materials. However, since the material is a soft polymer, no large torque is required.
- the cooling gas blowing type cooling device 53 has the cooling temperature shown in Fig. 4. It has the ability to clear conditions (Tg-45 ° C or less) and can blow cooling gas 54 of minus several tens of ° C by adiabatic cooling.
- the temperature sensor 55 is mounted on the spray nozzle 56 and can display almost the temperature of the material. Here, gas is used as the coolant, but liquid may be dropped.
- the material and the dice may be individually cooled, for example, by cooling the material near the supply port 57 of the transfer system using a similar method, and cooling the dice with a cooling device such as a Peltier element. When cooling below room temperature, dry air is flowed around the material and die to prevent condensation on the rolling machine.
- the method for producing a shape memory polymer composition of the present invention is a method for producing a shape memory polymer composition partially or entirely constituted by a polyurethane-based shape memory polymer, wherein a part or all of the composition is polyurethane-based.
- a shape memory polymer construct partially or entirely constituted by a polyurethane-based shape memory polymer is prepared.
- a known method such as injection molding, extrusion molding, ⁇ -shaped molding, and shaving molding is performed using the above-mentioned polymer.
- part of the polyurethane-based shape memory polymer In the case of a well-formed structure, a main body formed of a material other than the above-described polymer, for example, synthetic resin, metal, ceramics, wood, or the like, and the above-mentioned polymer are used for injection molding, extrusion molding, It can be obtained by combining with a polymer molded member obtained by a known method such as molding and shaping. For the combination of the main body and the polymer molded member, a known method such as bonding, screwing, fitting, or two-color molding can be used.
- a plastic working step of plastically working the processing target portion formed by the polyurethane-based shape memory polymer of the shape memory polymer one component prepared as described above at a strain rate of 14 sec ⁇ 1 or less is performed.
- the plastic working process is as described above.
- the plastic working process is, for example, a rolling process.
- the rolling process is preferably performed at a peripheral speed of 3.8 xd Ocm / sec or less with respect to the peripheral speed of the shaft rotation when the diameter of the component before processing is dO.
- the plastic working step is preferably performed in a state where the polymer (specifically, the plastic worked portion of the polymer structure) is cooled by 45 ° C. or more from the glass transition temperature of the shape memory polymer.
- the shape memory polymer component is, for example, a fastening body having a fastening function part formed by a plastic working process.
- a fastener made of a shape memory polymer according to a second embodiment of the present invention is, for example, a fastener made of a shape memory polymer according to a second embodiment of the present invention.
- the fastener according to the present invention is a fastener made of a shape memory polymer.
- the fastening body is a fastening body partially or entirely made of a polyurethane-based shape memory polymer, and has a convex portion, a concave portion, a concave-convex portion, a screw portion, and the like, which have a fastening function on a part of the polyurethane-based shape memory polymer. And it has at least one or more shapes selected from the group consisting of the inclined portions.
- the fastening function portion is constituted by the polyurethane-based shape memory polymer. According to the present invention in which a polyurethane-based shape memory polymer is used, if the joint body is heated to Tg or more, the fastened state of the joint body can be easily released.
- the fastening function portion of the fastening body is formed by secondary shaping using the above-described plastic working method or the heat forming-cooling fixing method. In this manner, by heating the fastening function portion of the fastening body to a temperature equal to or higher than Tg, the shape of the fastening function portion recovers before the formation of the fastening function, and the fastening function portion loses the fastening function.
- FIG. 6 is a diagram showing the shape of a male screw produced according to the first embodiment.
- the polyurethane-based shape memory polymer (trade name: Diary) used has a glass transition temperature of 55 ° C.
- the outer diameter of the material after machining is 5.25 for the outer diameter of the material shaft.
- the rolling speed was reduced to 1 cm / sec, and forced cooling at a temperature of 45 ° C resulted in the external thread shape shown in Fig. 6. This is probably the first time that the shape memory polymer has been given a shape with a fastening function by secondary shaping.
- the shape was recovered at 70 ° C for 1 minute to confirm the shape recovery characteristics. As shown in the figure, the shape recovered almost completely.
- the numerical data were as follows: the outer diameter before rolling was 5.25 mm, the outer diameter in the rolled state was 5.67 mm, and the outer diameter after recovery from heating was 5.25 mm.
- FIG. 7 shows that, regarding the male component (screw) 71a made of a shape memory polymer, the state changes to the member 71 in which the external thread has disappeared by heating to Tg or more.
- the shaft of the screw extends in the axial direction as compared to before the rolling, so that when the heated shape is recovered, the screw shrinks in the axial direction.
- FIG. 8 shows that a female part (nut) 72a made of a shape memory polymer changes its state to a member 72b in which the internal thread has disappeared when heated above Tg.
- the case where the internal thread portion disappears is illustrated, but the internal diameter of the internal thread portion may actually be enlarged.
- Fig. 9, Fig. 10 and Fig. 11 show the disassembled state of the fastener using the above threaded parts.
- Fig. 9 shows the secondary shaping of the male screw part of the male screw part 71c (heated member 71d) made of the shape memory polymer in the male and female fasteners that fit together.
- the front outer diameter d 0 (not shown, see FIG. 7) is replaced with the mating female screw part 7 2 c (member 72 d after heating: substantially unchanged), and the inner diameter D 1 ( (Not shown, see Fig. 8) FIG.
- equation (1) represents the disassembly condition
- equation (2) represents the fastening condition
- the outer diameter of the male thread can be made smaller than the inner diameter of the female thread, and the separation load can be reduced to zero.
- condition A the shape recovery rate does not become 100%, so if the outer diameter of the male thread after the shape recovery is d0 '(> d0), the equation (1) becomes
- Figure 10 shows the male and female fasteners that are mated with each other in a female screw part 72 e (heated member 72 f) made of shape memory polymer before secondary shaping of the female screw part of the female thread part.
- the inner diameter DO (not shown, see Fig. 8) of the mating external thread part 7 1 e (member 7 1 f after heating does not substantially change), the outer diameter d ⁇ of the male thread part (see figure This is not shown, but shows a fastener larger than that shown in Fig. 7).
- equation (3) represents the disassembly condition
- equation (4) represents the fastening condition
- Fig. 11 shows the male and female fasteners that fit into each other, with male thread 71 g (heated member 71 h) and female screw 72 g (heated member 72 h)
- male thread 71 g hereinated member 71 h
- female screw 72 g hereinated member 72 h
- the inner diameter of the female thread before secondary shaping was larger than the outer diameter of the mating male thread before secondary shaping when both were formed by shape-shaping polymer secondary shaping.
- equation (5) represents the decomposition condition
- equation (6) represents the fastening condition
- condition C the condition composed of the expressions (5) and (6) is looser than the conditions A and B described above.
- the shape recovery rate does not actually become 100%, using the inner and outer diameters after shape recovery
- Such a method of manufacturing the male screw portion and the female screw portion is based on plastic working.
- plastic working as with ordinary metal products, male threads can be rolled using rolling dies, and female threads can be rolled using plastic working type rolling taps.
- the screw part when the outer diameter of the male screw part is reduced and when the inner diameter of the female screw part is increased, the screw part can be formed by cutting. Further, when the inner diameter of the female screw is increased, the female screw may be formed by tapping screws.
- Fig. 13 is an image diagram of the test state of the tensile retest performed in the thermostatic oven.
- Figure 12 shows the test results. As shown in Fig. 13, when the thread in the rolled state was pulled at room temperature, it broke not at the shaft but at the thread, similar to ordinary metal screws, indicating that the thread itself had high strength.
- the maximum tensile load at that time was 19.1 kgf, which was a sufficient value.
- this value is converted to a stress notation using the effective area, it is 58MPa, which is larger than the value (47-51MPa) indicated by rigid PVC (polycarbonate). ) Is equivalent to the value (54 to 60 MPa). That is, it was confirmed that the polymer screw had sufficient strength as a plastic screw.
- the male screw disappeared during heating and the metal nut dropped off due to gravity. And disassembled.
- a simple combination of a male screw and a nut is used.
- a combination of a male screw part and a female screw part having other functions can also provide a fastener having a thermal decomposition function.
- the second embodiment relates to a so-called threaded part, and other fasteners such as snap-fits are shown in FIG. 14 as a third embodiment.
- FIG. 14 shows a structure corresponding to Condition A described above.
- Fig. 14 shows four types of structures in which the fastener of the present invention is applied to a male part (male fastener) and the action after heating.
- the shape before the fastening function portion was formed was restored by heating (Tg or more).
- Fastening members (male fastening bodies) 91 a, 91 e, 91 c, and 91 g made of shape memory polymer are members whose fastening functional parts have virtually disappeared by heating 9 1 b , 9 1f, 9 1d, 9 1 h.
- the female fastening members 92a, 92e, 92c, and 92g which are fastened to the above-mentioned fastening members 91a, 91e, 91c, and 91g, remain heated even after heating.
- the members 9 2 b, 92 f, 92 d and 92 h are substantially the same as before heating.
- FIG. 15 shows a structure corresponding to Condition B described above.
- Fig. 15 shows two types of structures in which the fastener of the present invention is applied to a female part (female fastener) and the action after heating.
- the shape before the fastening function portion was formed was restored by heating (Tg or more).
- the fastening members (female fastening bodies) 92 i and 92 k formed of the shape memory polymer are deformed into members 92 j and 92 I in which the fastening function part has substantially disappeared by heating.
- the male fastening members 91 i and 91 k fastened to the above fastening members 92 i and 92 k do not substantially change even after heating, and the heated members 91 j and 91 j 9 1 I is substantially the same as before heating.
- FIG. 16 shows a structure corresponding to the condition C described above.
- FIG. 16 shows the structure of the fastener of the present invention applied to a female part (female fastener) and a male part, and the action after heating.
- both the male fastening body and the female fastening body are restored to the shapes before the fastening function portion is formed by heating (Tg or more).
- the fastening member (female fastening member) 92 m formed by the shape memory polymer is deformed into a member 92 ⁇ in which the fastening function has been substantially eliminated by heating.
- the male fastening member 91 m fastened to the above-described fastening member 92 ⁇ is also transformed into a member 91 n in which the fastening function has been substantially eliminated by heating.
- the conditions regarding the inner diameter and the outer diameter, and the manufacturing method are the same as those in the second embodiment.
- the outer shape of the fastening function portion may be reduced for a male fastener, and the inner diameter of the fastening function portion or the fitting portion for a female fastener. May expand.
- 9 1 Refers to the case where the inner diameter of the mating pipe-shaped female part is expanded and disassembled with respect to the e-shaped snap fitting. In FIGS.
- the fastening body of the present invention is a fastening body partially or wholly made of a polyurethane shape memory polymer, and has a fastening function part formed by plastic working on a part of the polyurethane shape memory polymer. The part loses its fastening function when heated to a temperature higher than the glass transition temperature of the polyurethane-based shape memory polymer.
- the fastening body has a fastening function portion formed by plastic working at least in the vicinity of a fastening function forming portion made of a polyurethane-based shape memory polymer, and the fastening function portion has a predetermined temperature or higher. The heating function loses the fastening function.
- the fastening function part and its disappearance are as described above.
- the fastening body may be formed entirely of a polyurethane-based shape memory polymer, or may be formed of a polyurethane-based shape memory polymer only in the vicinity of a fastening function site.
- the specific example of the fastening body is also the same as described above.
- the fastening body is a male fastening body (for example, a port) as described above, and the fastening function portion is heated by being heated to a temperature equal to or higher than the glass transition temperature of the polyurethane-based shape memory polymer.
- the fastening function is lost, the diameter is reduced.
- the female fastening body for example, a nut
- the diameter of the male fastening body is reduced by eliminating the screwing state of both threads and reducing the diameter. It is easily detached from the fastener.
- an example of the fastening body is a female fastening body (for example, The fastening function part loses its fastening function and expands its diameter when heated to a temperature higher than the glass transition temperature of the polyurethane-based shape memory polymer. For this reason, when the female fastener is screwed together with a male fastener (for example, Porto), the female fastener is removed by removing the screwed state and expanding the diameter. Easily detached from the fastener.
- a male fastener for example, Porto
- the decomposition method according to the present invention is characterized in that at least one shape selected from the group consisting of a convex portion, a concave portion, a concave-convex portion, a screw portion, and an inclined portion, which exhibits a fastening function, is provided in a fastener made of a shape memory polymer
- the fastening function part is heated to a temperature equal to or higher than the glass transition temperature Tg to be softened, and the fastening body is disassembled in a state where the separation load of the fastening body is reduced.
- the present invention is a method of heating a fastener made of a shape memory polymer to Tg or more to soften it, reduce a separation load, and facilitate disassembly.
- Figure 17 shows an example.
- the external thread part is made of shape memory polymer, and the internal thread part is made of metal. This is the same as FIG. 8 of the second embodiment, except that the inner diameter of the nut part is smaller by 0.1 mm than the outer diameter of the male thread before rolling. At this time, the external shape of the external thread before secondary shaping is larger than the internal diameter of the internal thread, and even if it is heated to Tg or more, automatic decomposition by gravity does not occur.
- the maximum tensile load in the rolled state was 19.2 kgf, but it could be decomposed with only 0.8 kgf when pulled while being heated to Tg + 20 ° C. Therefore, if it is permissible to assume a small external force during disassembly, it is necessary to completely recover the shape by heating.
- the shape may be the same as the primary shape without secondary shaping, and the fastening function part may be formed by cutting. According to this disassembly method, it is possible to disassemble fasteners having various structures at once with a small external force, with almost no shape restrictions.
- Figures 18, 19, and 20 show the structures of plastic fasteners that can be used as targets.
- Members shown in Fig. 18 1 1 1 1 a, 1 1 1 b, 1 1 1 c, 1 1 1 d, 1 1 1 e, 1 1 1 f (special screw), 1 1 1 1 g (line head), 1 11 h (stud port), 11 i, 11 j, 11 k (trapezoidal screw), and 11 I (Torx) are specific examples of male fasteners.
- the members 112a, 112b, 112c (female threads), and 112d, 112e (caulking nuts) shown in Fig. 19 are specific examples of the female fastener.
- the members shown in Fig. 20 1 1 3 a, 1 1 3 b, 1 1 3 c, 1 1 3 d, 1 1 3 e, 1 1 3 f, 1 1 3 g 1 1 3 h, 1 1 3 i, 1 1 3 j, 1 1 3 k, 1 1 3 1, 1 1 3 m, 1 1 3 n, 1 1 3 o, 1 1 3 p, 1 1 3 q, 1 1 3 r, 1 1 3 s, 1 13 t, 1 13 u, 1 13 v, 1 13 w, 1 13 x are specific examples of the fastening body.
- the fastening bodies of Examples 2 and 3 are also subject to the decomposition method.
- the fastening body may not be particularly a polyurethane-based shape memory polymer.
- secondary shaping by cold plastic processing which has been difficult in the past, can be performed by designating the plastic working conditions reflecting the material properties of the polyurethane-based shape memory polymer.
- a fastening body that can be easily disassembled by a heating example is realized. Further, by providing the basic structure of the fastening body using the above-described processing method, a fastening body in which the shape of the fastening function is recovered by heating and the fastening force is lost can be realized.
- the fastening function is performed at room temperature by adjusting the relationship between the inner diameter of the female part and the outer diameter of the male part. While exerting, it is possible to realize a fastening structure that loses the fastening force by heating.
- a method other than the heat molding and the cooling fixing method is used.
- a method other than the heat molding and the cooling fixing method is used.
- a cold plastic working method which has been difficult in the past, has been made possible by a plastic working method that reflects the material characteristics of a polyurethane-based shape memory polymer. This facilitates secondary shaping of the polyurethane-based shape memory polymer, and makes it possible to manufacture a shape-memory polymer product having shape recovery characteristics by heating.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Insertion Pins And Rivets (AREA)
- Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003234784A AU2003234784A1 (en) | 2003-05-07 | 2003-05-07 | Shape memory polymer plastic-forming method, fastener, and shape memory polymer structure manufacturing method |
EP03728037A EP1634692A4 (en) | 2003-05-07 | 2003-05-07 | METHOD FOR FORMING POLYMER PLASTIC WITH SHAPE MEMORY, FIXING MEMBER, AND METHOD FOR MANUFACTURING SHAPE MEMORY POLYMER STRUCTURE |
PCT/JP2003/005723 WO2004098864A1 (ja) | 2003-05-07 | 2003-05-07 | 形状記憶ポリマーの塑性加工方法、締結体および形状記憶ポリマー構成物の製造方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2003/005723 WO2004098864A1 (ja) | 2003-05-07 | 2003-05-07 | 形状記憶ポリマーの塑性加工方法、締結体および形状記憶ポリマー構成物の製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004098864A1 true WO2004098864A1 (ja) | 2004-11-18 |
Family
ID=33428589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/005723 WO2004098864A1 (ja) | 2003-05-07 | 2003-05-07 | 形状記憶ポリマーの塑性加工方法、締結体および形状記憶ポリマー構成物の製造方法 |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1634692A4 (ja) |
AU (1) | AU2003234784A1 (ja) |
WO (1) | WO2004098864A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9488208B2 (en) | 2011-03-17 | 2016-11-08 | A. Raymond & Cie | Smart material actuated fasteners |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007061342A1 (de) * | 2007-12-17 | 2009-06-18 | Gkss-Forschungszentrum Geesthacht Gmbh | Artikel aus einem Formgedächtnis-Kompositmaterial, Verfahren zu seiner Herstellung sowie Verfahren zum Abrufen gespeicherter Formen |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH074407A (ja) * | 1993-06-11 | 1995-01-10 | Sony Corp | 結合保持部品、結合部材、電池装置、分離用部品 |
WO1998026187A1 (en) * | 1996-12-09 | 1998-06-18 | Brunel University | Method for disassembling different elements |
WO2001046597A1 (en) * | 1999-12-22 | 2001-06-28 | Brunel University | Releasable fasteners |
JP2002196150A (ja) * | 2001-04-02 | 2002-07-10 | Ichiro Yanaka | 光導入発光体 |
JP2003145564A (ja) * | 2001-11-07 | 2003-05-20 | Mitsubishi Heavy Ind Ltd | 形状記憶ポリマーの塑性加工方法および締結体 |
-
2003
- 2003-05-07 AU AU2003234784A patent/AU2003234784A1/en not_active Abandoned
- 2003-05-07 WO PCT/JP2003/005723 patent/WO2004098864A1/ja active Application Filing
- 2003-05-07 EP EP03728037A patent/EP1634692A4/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH074407A (ja) * | 1993-06-11 | 1995-01-10 | Sony Corp | 結合保持部品、結合部材、電池装置、分離用部品 |
WO1998026187A1 (en) * | 1996-12-09 | 1998-06-18 | Brunel University | Method for disassembling different elements |
WO2001046597A1 (en) * | 1999-12-22 | 2001-06-28 | Brunel University | Releasable fasteners |
JP2002196150A (ja) * | 2001-04-02 | 2002-07-10 | Ichiro Yanaka | 光導入発光体 |
JP2003145564A (ja) * | 2001-11-07 | 2003-05-20 | Mitsubishi Heavy Ind Ltd | 形状記憶ポリマーの塑性加工方法および締結体 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1634692A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9488208B2 (en) | 2011-03-17 | 2016-11-08 | A. Raymond & Cie | Smart material actuated fasteners |
Also Published As
Publication number | Publication date |
---|---|
AU2003234784A1 (en) | 2004-11-26 |
EP1634692A4 (en) | 2008-09-10 |
EP1634692A1 (en) | 2006-03-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3978014B2 (ja) | 形状記憶ポリマーの塑性加工方法 | |
JP6626441B2 (ja) | 鍛造製品および他の加工製品の製造方法 | |
CN101695806B (zh) | 汽车变速器倒档齿轮制造工艺 | |
CN101758159A (zh) | 钛合金整体盘轴锻件的近等温锻造方法 | |
WO2010049511A2 (en) | A novel process for the manufacture of auxetic foams and for the conversion of auxetic foam to conventional form | |
Pacheco et al. | Numerical simulation of electric hot incremental sheet forming of 1050 aluminum with and without preheating | |
JP2003531024A (ja) | 熱可塑性樹脂ペレット等で非繊維織物要素を直接形成する方法 | |
US6017274A (en) | Method of forming a fastener | |
WO2004098864A1 (ja) | 形状記憶ポリマーの塑性加工方法、締結体および形状記憶ポリマー構成物の製造方法 | |
CN1207117C (zh) | 一种紧固件的制造方法 | |
KR101169214B1 (ko) | 초내열합금 소재에 대한 열간 단조 방법 | |
CN101633020A (zh) | 镁合金冲压件制作数码相机外壳的加工工艺 | |
JPH06238387A (ja) | 長尺鋼材の鍛造方法 | |
CN201659531U (zh) | 棘轮扳手及棘轮扳手的制齿改良结构 | |
KR100385312B1 (ko) | 골접합 용구 및 그 제조법 | |
Standring | Characteristics of rotary forging as an advanced manufacturing tool | |
CN110961560B (zh) | 大高径比棒材一火次镦粗成型的锻造方法 | |
JPS62257839A (ja) | 繊維強化プラスチツク複合薄板及びその成形方法 | |
JP2750301B2 (ja) | スタッドボルトの製造方法 | |
TW201103660A (en) | Processing method of Mg-Li alloy components assembly | |
CN105562493A (zh) | 一种基于形状记忆聚合物的薄壁金属波纹管成形方法 | |
JP3177869U (ja) | 軸力表示座金 | |
JPH0861346A (ja) | ネジ、ボルト及びナット | |
Wissbrun | Force requirements in forging of crystalline polymers | |
JP2003088922A (ja) | 金属材料の温度傾斜塑性加工方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2003728037 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2003728037 Country of ref document: EP |