US20140245682A1 - Fastening resin structure and method for manufacturing the same - Google Patents
Fastening resin structure and method for manufacturing the same Download PDFInfo
- Publication number
- US20140245682A1 US20140245682A1 US14/195,963 US201414195963A US2014245682A1 US 20140245682 A1 US20140245682 A1 US 20140245682A1 US 201414195963 A US201414195963 A US 201414195963A US 2014245682 A1 US2014245682 A1 US 2014245682A1
- Authority
- US
- United States
- Prior art keywords
- resin
- collar
- fastening
- metal foam
- resin member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 229920005989 resin Polymers 0.000 title claims abstract description 321
- 239000011347 resin Substances 0.000 title claims abstract description 321
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000000034 method Methods 0.000 title claims description 11
- 239000006260 foam Substances 0.000 claims description 40
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 7
- 239000006262 metallic foam Substances 0.000 abstract description 105
- 239000000835 fiber Substances 0.000 abstract description 56
- 238000005304 joining Methods 0.000 description 51
- 229910000838 Al alloy Inorganic materials 0.000 description 28
- 239000011148 porous material Substances 0.000 description 27
- 238000005470 impregnation Methods 0.000 description 15
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 6
- 238000005245 sintering Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
- B29C45/14795—Porous or permeable material, e.g. foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/11—Understructures, i.e. chassis frame on which a vehicle body may be mounted with resilient means for suspension, e.g. of wheels or engine; sub-frames for mounting engine or suspensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
- B62D29/041—Understructures
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
-
- 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
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
- B29C45/14795—Porous or permeable material, e.g. foam
- B29C2045/14803—Porous or permeable material, e.g. foam the injected material entering minute pores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2715/00—Condition, form or state of preformed parts, e.g. inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2715/00—Condition, form or state of preformed parts, e.g. inserts
- B29K2715/003—Cellular or porous
-
- 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
- B29L2031/00—Other particular articles
- B29L2031/727—Fastening elements
Definitions
- the present invention relates to a fastening resin structure having a resin member and a metal part joined to the resin member, the metal part being capable of being fastened to another structure by means of fasteners.
- a well-known vehicle includes a fastening resin structure such as a dash panel or front pillar made from carbon fiber reinforced plastic (CFRP), and a front side member of aluminum alloy attached to the fastening resin structure by means of a bolt and a nut, as disclosed in JP-A-2007-290426.
- CFRP carbon fiber reinforced plastic
- the fastening resin structure disclosed in JP-A-2007-290426 includes a resin member, i.e., a dash panel and front pillar body made from carbon fiber reinforced plastic, and a metal collar joined to the resin member.
- the collar is a “to-be-fastened part” which is to be fastened to another member by means of fasteners such as a bolt and a nut, as is discussed below.
- the to-be-fastened part is coaxial with a mounting hole formed through a front side member of aluminum alloy with a bolt passing through the mounting hole and the to-be-fastened part.
- the bolt is tightened with a nut to fasten the to-be-fastened part to the front side member so as to attach the front side member to the fastening resin structure.
- the to-be-fastened part made of metal needs to be joined through an adhesive to the resin member for attachment of the aluminum-alloy-made front side member to the fastening resin structure.
- a joining area between the resin member and the collar may be enlarged.
- the enlargement of the joining area inevitably would make a size of the to-be-fastened part large and hence increase a weight of the fastening resin structure.
- the large size of the to-be-fastened part requires a large space for placement of the to-be-fastened part in fastening the fastening resin structure to another structure. This is a hindrance to enhancement of the freedom to design.
- An object of the present invention is to provide a fastening resin structure having a resin member and a to-be-fastened part downsized to lighten a weight of the fastening resin structure and maintain a joining strength to firmly join the resin member and the to-be-fastened part, the to-be-fastened part being capable of being placed in a small space in fastening the fastening resin structure to another structure.
- Another object of the present invention is to provide a method of manufacturing the aforementioned fastening resin structure.
- a fastening resin structure including a resin member and a to-be-fastened part of metal joined to the resin member, the to-be-fastened part being capable of being fastened to another structure through a fastener, the fastening resin structure comprising: a foam portion made from a foamable material, the foam portion being formed in the to-be-fastened part and joined to the resin member, wherein the foam portion is impregnated with a resin to join the foam portion to the resin member.
- the foam portion is formed in the to-be-fastened part of metal, and is impregnated with the resin (filling pores of the foam portion) to join the foam portion to the resin member. That is, the resin-impregnated foam portion is an intermediate portion interposed between the to-be-fastened part and the resin member.
- a coefficient of linear thermal expansion of the intermediate portion is set to be between a coefficient of linear thermal expansion of the foam portion and a coefficient of linear thermal expansion of resin (i.e., between a coefficient of linear thermal expansion of the to-be-fastened part and a coefficient of linear thermal expansion of the resin member), such that the intermediate portion mitigates a concentrated stress produced at an interface 16 between the resin member and the to-be-fastened part due to change in temperature under a high or low temperature condition.
- the foam portion Inside the foam portion is formed a multiplicity of pores. Due to the pores, the foam portion has an increased surficial area. The increased surficial area is joined to the resin when the pores are filled with the resin. That is, it is possible to provide the foam portion with the increased area joined to the resin without enlarging the to-be-fastened part.
- the foam portion (intermediate portion), interposed between the resin member and the to-be-fastened part, mitigates the concentrated stress produced at the interface between the resin member and the to-be-fastened part, and has the increased area joined to the resin.
- the resin has a sufficient joining strength (to firmly join the foam portion to the resin member). This allows for downsizing of the metallic to-be-fastened part to make the fastening resin structure lightweight.
- the to-be-fastened part downsized can be placed in a small space when the fastening resin structure is to be fastened to another structure. Since such a small space for placement of the downsized to-be-fastened part is easy to secure, the degree of freedom to design can be increased.
- a method for manufacturing a fastening resin structure including a resin member and a to-be-fastened part of metal joined to the resin member, the to-be-fastened part being capable of being fastened to another structure through a fastener, the method comprising the steps of: forming, in the to-be-fastened part, a foam portion made of a foamable material; placing, in a mold, the to-be-fastened part having the foam portion formed therein; and injecting a resin into a cavity of the mold to impregnate the foam portion with the resin to join the foam portion to the resin member.
- the foam portion is formed in the to-be-fastened part, and the to-be-fastened part having the foam portion formed therein is placed in the mold. After the placement, the resin is injected into the cavity of the mold to impregnate the foam portion with the resin for joining the foam portion to the resin member.
- the foam portion is formed in the to-be-fastened part, it is possible to join the to-be-fastened part to the resin member through the foam portion by the mere injection of the resin into the cavity. In this easy way, the fastening resin structure can be manufactured.
- the fastening resin structure can be easily manufactured, as discussed above, the cost of the structure may be low.
- FIG. 1 is a perspective view of a fastening resin structure in a first embodiment of the present invention
- FIG. 2 is a cross-sectional view taken along line 2 - 2 of FIG. 1 ;
- FIG. 3 is an exploded perspective view of a first collar and a metal foam portion in the first embodiment
- FIG. 4 is an enlarged view of part 4 of FIG. 2 ;
- FIGS. 5A to 5C are views illustrating a method of manufacturing the fastening resin structure in the first embodiment
- FIG. 6 is a view showing that the structure is designed to mitigate a stress produced in a joining resin portion of FIG. 4 ;
- FIG. 7 is a perspective view of a fastening resin structure in a second embodiment of the present invention.
- FIG. 8 is a cross-sectional view taken along 8 - 8 of FIG. 7 ;
- FIG. 9 is a perspective view of a fastening resin structure in a third embodiment of the present invention.
- FIG. 10 is a cross-sectional view taken along 10 - 10 of FIG. 9 ;
- FIG. 11 is a perspective view of a fastening resin structure in a fourth embodiment of the present invention.
- the fastening resin structure 10 is, for example, a vehicular sub-frame which is generally U-shaped as viewed in plan and adapted to support a power plant.
- An exemplary power plant is an engine and transmission unit which is a unitary structure of an engine and a transmission.
- the fastening resin structure 10 includes a fiber reinforced resin member 12 which is generally U-shaped, first and second collars (to-be-fastened parts) 14 , 15 in opposite corners 12 a , 12 b of the fiber reinforced resin member 12 , and third and fourth collars (to-be-fastened parts) 16 , 17 in opposite end portions 12 c , 12 d of the fiber reinforced resin member 12 .
- the fastening resin structure 10 further includes first to fourth metal foam portions 21 , 22 , 23 , 24 formed in the first to fourth collars 14 , 15 , 16 , 17 , respectively, and a resin portion 26 joining the first to fourth metal foam portions 21 , 22 , 23 , 24 to the fiber reinforced resin member 12 .
- the fiber reinforced resin member 12 is formed of a fiber reinforced resin and is of generally square-shaped, closed cross-section.
- the fiber reinforced resin member 12 includes a top portion 32 which is generally U-shaped as viewed in plan, an outer wall portion 33 extending generally in the form of a U-shape as viewed in plan, an inner wall portion 34 extending generally in the form of a U-shape as viewed in plan, and a bottom portion 35 which is generally U-shaped as viewed in plan.
- the top, outer wall, inner wall and bottom portions 32 , 33 , 34 , 35 define a generally square-shaped, closed cross-section.
- the top, outer wall, inner wall and bottom portions 32 , 33 , 34 , 35 are made from a carbon fiber reinforced plastic (CFRP) formed by a continuous fiber mat (e.g., a carbon fiber mat) and a thermoplastic resin sheet laminated on opposite sides of the mat.
- CFRP carbon fiber reinforced plastic
- the opposite corners 12 a , 12 b and opposite end portions 12 c , 12 d of the fiber reinforced resin member 12 have first to fourth mounting holes formed therethrough. It is noted that only the first one 37 formed through the corner 12 a is shown. The first to fourth metal foam portions 21 to 24 are inserted through the first to fourth mounting holes, respectively.
- the first to fourth collars 14 to 17 are like parts, and hence a detailed discussion is made below only as to the first collar 14 and discussions of the second to fourth collars 15 to 17 are omitted.
- the first to fourth metal foam potions 21 to 24 are like portions, and hence a discussion is made below only as to the first metal foam portion 21 and discussions of the second to fourth metal foam portions 22 to 24 are omitted.
- the first collar 14 includes a (metal) upper collar section 41 made of aluminum alloy inserted into the first mounting hole 37 from above, and a (metal) lower collar section 45 made of aluminum alloy inserted into the first mounting hole 37 from below. That is, the first collar 14 is halved into the upper and lower collar sections 41 , 45 .
- the upper collar section 41 is formed by sintering an aluminum alloy powder, and includes an upper tubular portion 42 and an upper flange portion 43 protruding radially outwardly from an upper end 42 a of the upper tubular portion 42 .
- the upper collar section 41 includes a portion 41 a defined by an outer circumferential surface 42 b of the upper tubular portion 42 and a lower surface 43 a of the upper flange portion 43 . At this portion (hereinafter referred to as “upper collar portion”) 41 a , the upper collar section 41 is joined to a circumferential edge 38 defining the first mounting hole 37 of the fiber reinforced resin member 12 .
- the lower collar section 45 is formed by sintering an aluminum powder as in the upper collar section 41 , and includes a lower tubular portion 46 and a lower flange portion 47 protruding radially outwardly from a lower end 46 a of the lower tubular portion 46 .
- the lower collar section 45 includes a portion 45 a defined by an outer circumferential surface 46 b of the lower tubular portion 46 and an upper surface 47 a of the lower flange portion 47 . At this portion (hereinafter referred to as “lower collar portion”) 45 a , the lower collar section 45 is joined to the circumferential edge 38 .
- the upper and lower collar sections 41 , 45 have a through-hole 48 formed therethrough.
- the through-hole 48 is configured to allow insertion of a bolt (fastener) 65 ( FIG. 1 ) therethrough.
- the first metal foam portion 21 is made of aluminum metal foam (e.g., open-cell metal foam).
- the first metal foam portion 21 includes an upper metal foam section 51 formed in the upper collar section 41 and inserted into the first mounting hole 37 from above, and a lower metal foam section 55 formed in the lower collar section 45 and inserted into the first mounting hole 37 from below.
- the upper metal foam section 51 has a multiplicity of pores 54 ( FIG. 4 ) formed therein.
- the pores 54 are formed by forming aluminum alloy into metal foam integrally with the upper collar section 41 in forming the upper collar section 41 .
- the upper metal foam section 51 includes an upper tubular foam portion 52 formed on the outer circumferential surface 42 b of the upper tubular portion 42 , and an upper flange foam portion 53 protruding radially outwardly from an upper end 52 a of the upper tubular foam portion 52 along the upper flange portion 43 (i.e., along the lower surface 43 a ).
- the upper metal foam section 51 is formed integrally with the upper collar portion 41 a.
- the lower metal foam section 55 has a multiplicity of pores (not shown) formed therein. These pores are formed by forming aluminum alloy into metal foam integrally with the lower collar section 45 in forming the lower collar section 45 .
- the lower metal foam section 55 includes a lower tubular foam portion 56 formed on the outer circumferential surface 46 b of the lower tubular portion 46 , and a lower flange foam portion 57 protruding radially outwardly from a lower end 56 a of the lower tubular foam portion 56 along the lower flange portion 47 (i.e., along the upper surface 47 a ).
- the lower metal foam section 55 is formed integrally with the lower collar portion 45 a.
- upper metal foam section 51 and the lower metal foam section 55 are designated at different reference numerals for easy understanding of these sections although they may be identical.
- the resin portion 26 includes impregnation resins 27 impregnating the upper metal foam section 51 , and a joining resin 28 contiguous with the resins 27 and joining the upper metal foam section 51 to the fiber reinforced resin member 12 (i.e., the circumferential edge 38 ), and a reinforcement resin 29 contiguous with the joining resin 28 and reinforcing the fiber reinforced resin member 12 .
- the circumferential edge 38 defines the first mounting hole 37 formed in the corner 12 a of the fiber reinforced resin member 12 .
- the impregnation resins 27 fill the multiple pores 54 of the upper metal foam section 51 .
- the upper metal foam section 51 and the impregnation resins 27 filling the pores 54 define an upper intermediate portion 61 .
- the upper intermediate portion 61 contains both aluminum alloy and resin, and thus has a coefficient of linear thermal expansion ⁇ 1 set to be between a coefficient of linear thermal expansion of aluminum alloy and a coefficient of linear thermal expansion of resin. This means that the coefficient of linear thermal expansion ⁇ 1 is set to be between the coefficient of linear thermal expansion ⁇ 2 of the upper collar section 41 and the coefficient of linear thermal expansion ⁇ 3 of the fiber reinforced resin member 12 .
- the upper intermediate portion 61 is interposed between the fiber reinforced resin member 12 (i.e., the circumferential edge 38 ) and the upper collar section 41 (i.e., the upper collar portion 41 a ) and is formed integrally with the upper collar section 41 . Between the upper intermediate portion 61 and the circumferential edge 38 is interposed the joining resin 28 .
- the joining resin 28 is interposed (and fills a gap) between the upper metal foam section 51 and the fiber reinforced resin member 12 (i.e., the circumferential edge 38 ).
- the upper metal foam section 51 and the circumferential edge 38 are joined to each other by the joining resin 28 filling the gap therebetween.
- the upper collar section 41 i.e., the upper collar portion 41 a ) is joined to the circumferential edge 38 .
- the reinforcement resin 29 is disposed along an interior surface 13 of the fiber reinforced resin member 12 . More specifically, the reinforcement resin 29 has a predetermined thickness on the interior surface 13 of the fiber reinforced resin member 12 which is of generally square-shaped closed cross-section.
- the fiber reinforced resin member 12 is reinforced by the reinforcement resin 29 disposed on the interior surface 13 of the fiber reinforced resin member 12 .
- the reinforcement resin 29 can be easily formed along the interior surface 13 of the fiber reinforced resin member 12 in joining the upper collar section 41 (i.e., the upper collar portion 41 a ) to the upper metal foam section 51 by means of resin.
- the lower collar section 45 has the lower metal foam section 55 formed on the lower collar portion 45 a in the similar manner to the upper collar section 41 .
- the lower metal foam section 55 is joined to the fiber reinforced resin member 12 (i.e., the circumferential edge 38 ) through the joining resin 28 . That is, through the lower metal foam section 55 and the joining resin 28 , the lower collar portion 45 a of the lower collar section 45 is joined to the circumferential edge 38 .
- the first collar 14 is joined to the circumferential edge 38 through the joining resin 28 .
- the second collars 15 to fourth collars 17 are joined to the fiber reinforced resin member 12 through the joining resin 28 , as in the first collar 14 .
- the bolts 65 are inserted through the first to fourth collars 14 to 17 with heads 65 a protruding upwardly out of the first to fourth collars 14 to 17 and threadedly engaging nuts (fasteners) welded to a vehicle body (another structure) 68 . It is noted that only one of the nuts is shown at reference numeral 66 .
- the fastening resin structure 10 is fastened to the vehicle body 68 .
- the first collar 14 is formed to have the first metal foam portion 21 to be joined to the fiber reinforced resin member 12 .
- the fiber reinforced resin member 12 is formed by laminating thermoplastic resin sheets 72 , 73 on opposite sides of a continuous fiber mat 71 (e.g., a carbon fiber mat).
- the fiber reinforced resin member 12 is halved into upper and lower sections.
- the fiber reinforced resin member 12 thus halved is to be placed on a stationary mold member 77 of a mold 76 .
- a core 75 is placed in an inner space 74 of the fiber reinforced resin member 12 during the placement of the fiber reinforced resin member 12 on the stationary mold member 77 of the mold 76 .
- the first collar 14 having the first metal foam portion 21 is placed into the first mounting hole 37 of the fiber reinforced resin member 12 , after which a movable mold member 78 is moved to close the mold 76 .
- a resin is injected into a cavity 79 ( FIG. 5B ) of the mold 76 thus closed.
- the injected resin impregnates the first metal foam portion 21 as well as filling the cavity 79 .
- the resin portion 26 is formed (overmolded), such that the first metal foam portion 21 is joined to the fiber reinforced resin member 12 through the joining resin 28 of the resin portion 26 , thereby manufacturing the fastening resin structure 10 .
- the mold 76 ( FIG. 5B ) is opened and the fastening resin structure 10 is taken out of the opened mold 76 .
- the core 75 ( FIG. 5B ) is removed from the fastening resin structure 10 thus taken out of the mold 76 . This completes the process for manufacturing the fastening resin structure 10 .
- first metal foam portion 21 is formed in the first collar 14 , it becomes possible to join the first collar 14 to the fiber reinforced resin member 12 through the first metal foam portion 21 by the mere injection of the resin into the cavity 79 . This makes it possible to easily manufacture the fastening resin structure 10 , thereby keeping down the cost of the fastening resin structure 10 .
- the upper intermediate portion 61 interposed between the fiber reinforced resin member 12 and the upper collar section 41 , is in contact with the joining resin 28 .
- the upper intermediate portion 61 contains both aluminum alloy and resin (impregnation resins 27 ) and thus has the coefficient of linear thermal expansion ⁇ 1 set to be between the coefficient of linear thermal expansion ⁇ 2 of the upper collar section 41 and the coefficient of linear thermal expansion ⁇ 3 of the fiber reinforced resin member 12 .
- a difference ( ⁇ 1 ⁇ 3) in the coefficient of linear thermal expansion between the upper intermediate portion 61 and the fiber reinforced resin member 12 (i.e., the circumferential edge 38 ) is smaller than a difference ( ⁇ 1 ⁇ 2) in the coefficient of linear thermal expansion.
- a concentrated stress produced at the interface between the joining resin 28 and the upper collar section 41 due to a temperature change under a high or low temperature environment can be mitigated by the upper intermediate portion 61 .
- the upper metal foam portion 51 has an increased surficial area S 1 due to the multiplicity of pores 54 formed therein. That is, without having to enlarge the overall size of the upper metal foam portion 51 (i.e., the upper collar section 41 ), it is possible to provide the upper metal foam portion 51 with an increased area S 2 joined to the joining resin 28 (and the impregnation resins 27 ).
- the upper intermediate portion 61 interposed between the fiber reinforced resin member 12 (i.e., the circumferential edge 38 ) and the upper collar section 41 , to mitigate the stress generated at the interface between the joining resin 28 and the upper collar section 41 .
- the joining resin 28 provides a sufficient joining strength (to firmly join the upper metal foam portion 51 to the resin member 28 ). This allows for downsizing of the aluminum-alloy upper collar section 41 to make the fastening resin structure 10 lightweight.
- the upper collar section 41 downsized can be placed in a small space when the fastening resin structure 10 is to be fastened to another structure 68 , as shown in FIG. 1 . Since such a small space for placement of the downsized upper collar section 41 is easy to secure, the degree of freedom to design can be increased.
- fastening resin structures in second to fourth embodiments of the present invention Discussions are made below as to fastening resin structures in second to fourth embodiments of the present invention, with reference to FIGS. 7 to 11 .
- like parts used in the fastening resin structure 10 in the first embodiment are designated at like reference numerals and discussions of these like parts are omitted.
- a fastening resin structure 80 in the second embodiment is discussed below.
- the fastening resin structure 80 is substantially the same as the fastening resin structure 10 in the first embodiment except that the fastening resin structure 80 includes first to fourth blocks 82 to 85 (to-be-fastened parts) rather than the first to fourth collars 14 to 17 discussed in the first embodiment.
- the first to fourth blocks 82 to 85 are disposed at the opposite corners 12 a , 12 b and opposite end portions 12 c , 12 d of the fiber reinforced resin member 12 .
- first to fourth blocks 82 to 85 are similar to one another and hence a discussion is made below as to the first block 82 only and discussions of the second to fourth blocks 82 to 85 are omitted.
- the first block 82 is formed by sintering an aluminum alloy powder into a generally rectangular shape.
- the first block 82 has a through-hole 89 formed therethrough to allow insertion of the bolt 65 ( FIG. 1 ) into the through-hole 89 .
- the first block 82 has first and second block surfaces 82 a , 82 b ( FIG. 7 ) having a portion 82 c to be joined to the one corner 12 a of the fiber reinforced resin member 12 .
- the portion 82 c is hereinafter referred to as a “block portion 82 c”.
- the metal foam portion 87 has a multiplicity of pores formed therein.
- the pores are formed by forming aluminum alloy into metal foam (e.g., open-cell metal foam) integrally with the first block 82 in forming the first block 82 .
- the metal foam portion 87 is formed integrally with the block portion 82 c of the first block 82 .
- the metal foam portion 87 and the fiber reinforced resin member 12 are joined to each other through the joining resin 28 of the resin portion 26 .
- the multiple pores of the metal foam portion 87 are filled with the impregnation resins 27 ( FIG. 4 ).
- the metal foam portion 87 and the impregnation resins 27 define an intermediate portion 91 .
- the intermediate portion 91 contains both aluminum alloy and resin.
- a coefficient of linear thermal expansion of the intermediate portion 91 is set to be between a coefficient of linear thermal expansion of aluminum alloy and a coefficient of linear thermal expansion of resin (i.e., between a coefficient of linear thermal expansion of the first block 82 and a coefficient of linear thermal expansion of the fiber reinforced resin member 12 ).
- the intermediate portion 91 is interposed between the fiber reinforced resin member 12 (i.e., the one corner 12 a ) and the first block 82 and formed integrally with the first block 82 .
- the joining resin 28 is interposed between the intermediate portion 91 and the one corner 12 a.
- the metal foam portion 87 has an increased surficial area due to the multiplicity of pores formed therein. That is, without having to enlarge the overall size of the metal foam portion 87 (i.e., the first block 82 ), it is possible to provide the metal foam portion 87 with an increased area joined to the joining resin 28 (and the impregnation resins 27 ).
- the intermediate portion 91 interposed between the fiber reinforced resin member 12 (i.e., the one corner 12 a ) and the first block 82 , to mitigate the stress generated at the interface between the joining resin 28 and the first block 82 .
- the joining resin 28 provides a sufficient joining strength (to firmly join the metal foam portion 87 to the one corner 12 a ). This allows for downsizing of the aluminum-alloy first block 82 to make the fastening resin structure 80 lightweight.
- the first block 82 downsized can be placed in a small space when the fastening resin structure 80 shown in FIG. 7 is to be fastened to another structure 68 ( FIG. 1 ). Since such a small space for placement of the downsized first block 82 is easy to secure, the degree of freedom to design can be increased.
- the fastening resin structure 80 can be manufactured in the same manner as the fastening resin structure 10 in the first embodiment.
- the fastening resin structure 80 can be easily manufactured, the cost of the fastening resin structure 80 may be low.
- the fastening resin structure 80 has the same advantageous result as the fastening resin structure 10 in the first embodiment.
- the fastening resin structure can be put in various uses.
- a fastening resin structure 100 in the third embodiment is discussed below.
- the fastening resin structure 100 is substantially the same as the fastening resin structure 10 in the first embodiment except that the fastening resin structure 100 includes an injection-molded resin member 102 rather than the fiber reinforced resin member 12 .
- the resin member 102 is an injection-molded resin-made member mountable to the vehicle body 68 . At first to third end portions 102 a to 102 c of the resin member 102 are disposed first to third collars 104 to 106 (to-be-fastened parts).
- first to third collars 104 to 106 are similar to one another and hence a discussion is made below as to the first collar 104 only and discussions of the second and third collars 105 , 106 are omitted.
- Bolts (fasteners) 108 are inserted through the first to third collars 104 to 106 and fastened to the vehicle body 68 to thereby fasten (attach) the fastening resin structure 100 to the vehicle body 68 .
- a bolt is inserted through a support collar 109 of the fastening resin structure 100 and threadedly engaged with an engine etc. such that the engine etc. is supported by the fastening resin structure 100 .
- the support collar 109 is disposed in the resin member 102 with an elastic member 111 interposed therebetween.
- the first collar 104 is formed by sintering an aluminum alloy powder into a tubular shape, and has a through-hole 113 formed therethrough to allow insertion of the bolt 108 ( FIG. 9 ) into the through-hole 113 .
- the first collar 104 has an outer circumferential surface defining a portion 104 a to be joined to the first end portion 102 a of the resin member 102 .
- the portion 104 a is hereinafter referred to as a “collar portion 104 a”.
- a metal foam portion 115 has a multiplicity of pores formed therein.
- the pores are formed by forming aluminum alloy into metal foam (e.g., open-cell metal foam) integrally with the first collar 104 in forming the first collar 104 .
- the metal foam portion 115 is formed integrally with the collar portion 104 a of the first collar 104 .
- the metal foam portion 115 and the resin member 102 are joined to each other through a joining resin 118 of a resin portion 117 .
- the multiple pores of the metal foam portion 115 are filled with impregnation resins (like the impregnation resins 27 shown in FIG. 4 ).
- the metal foam portion 115 and the impregnation resins define an intermediate portion 121 .
- the intermediate portion 121 contains both aluminum alloy and resin.
- a coefficient of linear thermal expansion of the intermediate portion 121 is set to be between a coefficient of linear thermal expansion of aluminum alloy and a coefficient of linear thermal expansion of resin (i.e., between a coefficient of linear thermal expansion of the first collar 104 and a coefficient of linear thermal expansion of the resin member 102 ).
- the intermediate portion 121 is interposed between the resin member 102 (i.e., the first end portion 102 a ) and the first collar 104 and formed integrally with the first collar 104 .
- the joining resin 118 is interposed between the intermediate portion 121 and the first end portion 102 a.
- the metal foam portion 115 has an increased surficial area due to the multiplicity of pores formed therein.
- the metal foam portion 115 of the increased surficial area is impregnated with the impregnation resins. That is, without having to enlarge the overall size of the metal foam portion 115 (i.e., the first collar 104 ), it is possible to provide the metal foam portion 115 with an increased area joined to the joining resin 118 (and the impregnation resins).
- the intermediate portion 121 interposed between the resin member 102 (i.e., the one end portion 102 a ) and the first collar 104 , to mitigate the stress generated at the interface between the joining resin 118 and the first collar 104 .
- the joining resin 118 provides a sufficient joining strength (to firmly join the metal foam portion 115 to the first end portion 102 a ). This allows for downsizing of the aluminum-alloy first collar 104 to make the fastening resin structure 100 lightweight.
- the first collar 104 downsized can be placed in a small space when the fastening resin structure 100 shown in FIG. 9 is to be fastened to another structure 68 ( FIG. 9 ). Since such a small space for placement of the downsized first collar 104 is easy to secure, the degree of freedom to design can be increased.
- the fastening resin structure 100 can be manufactured in the same manner as the fastening resin structure 10 in the first embodiment.
- the fastening resin structure 100 can be easily manufactured, the cost of the fastening resin structure 100 may be low.
- the fastening resin structure 100 has the same advantageous result as the fastening resin structure 10 in the first embodiment.
- the fastening resin structure can be put in various uses.
- a fastening resin structure 130 in a fourth embodiment is discussed below.
- the fastening resin structure 130 is substantially the same as the fastening resin structure 100 in the third embodiment except that the fastening resin structure 130 includes a first collar 132 (to-be-fastened part) rather than the first collar 104 in the third embodiment, and the resin member 102 of the structure 130 doubles as the joining resin 118 .
- the first collar 132 is formed by sintering an aluminum alloy powder into a tubular shape, and has a through-hole 133 formed therethrough to allow insertion of the bolt 108 ( FIG. 9 ) into the through-hole 133 .
- the first collar 132 has an outer circumferential surface defining a portion 132 a to be joined to the first end portion 102 a of the resin member 102 .
- the portion 132 a is hereinafter referred to as a “collar portion 132 a”.
- a metal foam portion 135 has a multiplicity of pores formed therein.
- the pores are formed by forming aluminum alloy into metal foam (e.g., open-cell metal foam) integrally with the first collar 132 in forming the first collar 132 .
- the metal foam portion 135 is formed integrally with the collar portion 132 a of the first collar 132 .
- the fastening resin structure 130 is formed by placing in a cavity of a mold the first collar 132 having the metal foam portion 135 , closing the mold, and filling the cavity with resin to form the resin member 102 . During the filling of the cavity with the resin, a portion of the resin fills the multiple of pores, as do the impregnation resins 27 . The metal foam portion 135 and the resin portion filling the pores define an intermediate portion 137 .
- the metal foam portion 135 with the pores filled with the resin portion is joined to the resin member 102 (i.e., the first end portion 102 a ).
- the fastening resin structure 130 has the first metal foam portion 135 formed in the first collar 132 , it becomes possible to join the first collar 132 to the resin member 102 through the first metal foam portion 135 by the mere injection of the resin into the mold cavity. This makes it possible to easily manufacture the fastening resin structure 130 in the same manner as the fastening resin structure 10 in the first embodiment, thereby keeping down the cost of the fastening resin structure 130 .
- the intermediate portion 137 which is defined by the metal foam portion 135 and the resin portion filling the pores of the metal foam portion 135 , contains both aluminum alloy and resin.
- a coefficient of linear thermal expansion of the intermediate portion 137 is set to be between a coefficient of linear thermal expansion of aluminum alloy and a coefficient of linear thermal expansion of resin (i.e., between a coefficient of linear thermal expansion of the first collar 132 and a coefficient of linear thermal expansion of the resin member 102 ).
- the intermediate portion 137 is interposed between the resin member 102 (i.e., the first end portion 102 a ) and the first collar 132 and formed integrally with the first collar 132 .
- the metal foam portion 135 has an increased surficial area due to the multiplicity of pores formed therein.
- the metal foam portion 135 of the increased surficial area is impregnated with the resin portion. That is, without having to enlarge the overall size of the metal foam portion 135 (i.e., the first collar 132 ), it is possible to provide the metal foam portion 135 with an increased area joined to the resin member 102 (and the resin portion).
- the intermediate portion 137 interposed between the resin member 102 (i.e., the one end portion 102 a ) and the first collar 132 , to mitigate the stress generated at the interface between the resin member 102 and the first collar 132 .
- the resin member 102 With the increased joined area of the metal foam portion 135 joined to the first end portion 102 a , the resin member 102 provides a sufficient joining strength (to firmly join the metal foam portion 135 to the first end portion 102 a ). This allows for downsizing of the aluminum-alloy first collar 132 to make the fastening resin structure 130 lightweight.
- the first collar 132 downsized can be placed in a small space when the fastening resin structure 130 is to be fastened to another structure 68 ( FIG. 9 ). Since such a small space for placement of the downsized first collar 132 is easy to secure, the degree of freedom to design can be increased.
- the fastening resin structure 130 has the same advantageous result as the fastening resin structure 10 in the first embodiment.
- the fastening resin structure can be put in various uses.
- fastening resin structure and the method for manufacturing the structure may be modified or changed without being limited to those discussed above.
- the fiber reinforced resin member 12 is a unitary member formed to have a generally U-shaped configuration as viewed in plan in the first embodiment, three separate linear members may be joined to one another to provide the fiber reinforced resin member having a generally U-shaped configuration as viewed in plan.
- porosities of the pores 54 of the metal foam portions 21 to 24 , 87 , 115 , 135 in the first to fourth embodiments may vary to change a mechanical property and coefficient of linear thermal expansion of the metal foam portion.
- metal foam portions 21 to 24 , 87 , 115 , 135 in the first to fourth embodiments are made from aluminum alloy, they may be made from other foamable materials such as magnesium materials, steel materials and SiC (Silicon Carbide).
- the resin portions 26 and 117 in the first to fourth embodiments may be made from either of thermoplastic and thermosetting resins because these resins have fluidity to impregnate the metal foam portions 21 to 24 , 87 , 115 , 135 in forming the resin portions 26 and 117 .
- each of the fastening resin structures in the first to fourth embodiments is to be attached (fastened)
- the respective fastening resin structures may be attached to structures other than the vehicle body 68 .
- metal foam portions 21 to 24 , 87 , 115 , 135 are formed integrally with the collars in sintering an aluminum alloy powder to form the collars in the first to fourth embodiments
- another method may be employed to form the metal foam portions.
- molten metal may be solidified into the metal foam portions.
- fastening resin structures, the fiber reinforced resin members, the first to fourth collars, the first to fourth metal foam portions, the resin portion, the impregnation resins, the joining resin, the reinforcement resin, the upper and lower collar portions, the vehicle body, the mold, the mold cavity, the first to fourth blocks, the block portion, the metal foam portions, the resin member, and the collar portion in the first to fourth embodiments may have shapes or forms other than those discussed in the first to fourth embodiments.
- the present invention is suitable for an automobile having a resin member and a metal portion joined to the resin member, the metal portion being capable of being fastened to another structure through fasteners.
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Civil Engineering (AREA)
- Body Structure For Vehicles (AREA)
- Connection Of Plates (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Priority Applications (1)
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US14/721,626 US9610719B2 (en) | 2013-03-04 | 2015-05-26 | Fastening resin structure and method for manufacturing the same |
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JP2013041572A JP6030480B2 (ja) | 2013-03-04 | 2013-03-04 | 締結樹脂構造体及びその製造方法 |
JP2013-041572 | 2013-03-04 |
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US14/721,626 Division US9610719B2 (en) | 2013-03-04 | 2015-05-26 | Fastening resin structure and method for manufacturing the same |
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US20140245682A1 true US20140245682A1 (en) | 2014-09-04 |
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US14/195,963 Abandoned US20140245682A1 (en) | 2013-03-04 | 2014-03-04 | Fastening resin structure and method for manufacturing the same |
US14/721,626 Active US9610719B2 (en) | 2013-03-04 | 2015-05-26 | Fastening resin structure and method for manufacturing the same |
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US14/721,626 Active US9610719B2 (en) | 2013-03-04 | 2015-05-26 | Fastening resin structure and method for manufacturing the same |
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US (2) | US20140245682A1 (ja) |
JP (1) | JP6030480B2 (ja) |
CN (1) | CN104029733B (ja) |
DE (1) | DE102014203884A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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FR3051427A1 (fr) * | 2016-05-18 | 2017-11-24 | Renault Sas | Berceau de vehicule automobile comprenant une premiere partie et une seconde partie et des moyens de fixation |
CN107628112A (zh) * | 2016-07-18 | 2018-01-26 | 现代自动车株式会社 | 用于副车架的安装装置 |
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JP6379993B2 (ja) * | 2014-10-22 | 2018-08-29 | スズキ株式会社 | 樹脂溶着構造体とその製造方法 |
JP6379992B2 (ja) * | 2014-10-22 | 2018-08-29 | スズキ株式会社 | 樹脂溶着構造体とその製造方法 |
JP2020139680A (ja) * | 2019-02-28 | 2020-09-03 | 株式会社デンソー | 冷凍サイクル装置 |
JP2020139561A (ja) * | 2019-02-28 | 2020-09-03 | 株式会社デンソー | 弁装置 |
JP6992777B2 (ja) * | 2019-02-28 | 2022-01-13 | 株式会社デンソー | 冷凍サイクル装置、蒸発圧力調整弁 |
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Also Published As
Publication number | Publication date |
---|---|
CN104029733A (zh) | 2014-09-10 |
US9610719B2 (en) | 2017-04-04 |
JP6030480B2 (ja) | 2016-11-24 |
JP2014169011A (ja) | 2014-09-18 |
DE102014203884A1 (de) | 2014-09-04 |
US20150258720A1 (en) | 2015-09-17 |
CN104029733B (zh) | 2017-06-13 |
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Owner name: HONDA MOTOR CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AWANO, KATSUYUKI;REEL/FRAME:032504/0272 Effective date: 20140226 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |