JPH07237512A - Blow molded bumper beam - Google Patents
Blow molded bumper beamInfo
- Publication number
- JPH07237512A JPH07237512A JP6030060A JP3006094A JPH07237512A JP H07237512 A JPH07237512 A JP H07237512A JP 6030060 A JP6030060 A JP 6030060A JP 3006094 A JP3006094 A JP 3006094A JP H07237512 A JPH07237512 A JP H07237512A
- Authority
- JP
- Japan
- Prior art keywords
- bumper beam
- main body
- weight
- reinforcing member
- strength
- 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.)
- Granted
Links
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 44
- 239000012779 reinforcing material Substances 0.000 claims description 35
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000012360 testing method Methods 0.000 abstract description 17
- 238000000071 blow moulding Methods 0.000 abstract description 11
- 230000008719 thickening Effects 0.000 abstract 1
- 239000003365 glass fiber Substances 0.000 description 31
- 229920005989 resin Polymers 0.000 description 23
- 239000011347 resin Substances 0.000 description 23
- 239000008188 pellet Substances 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 16
- 239000000463 material Substances 0.000 description 14
- 229920005653 propylene-ethylene copolymer Polymers 0.000 description 14
- 229920001384 propylene homopolymer Polymers 0.000 description 13
- 238000000465 moulding Methods 0.000 description 12
- -1 polypropylene Polymers 0.000 description 12
- 229920000098 polyolefin Polymers 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 9
- 239000000835 fiber Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000000155 melt Substances 0.000 description 7
- 239000011342 resin composition Substances 0.000 description 7
- 239000004743 Polypropylene Substances 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 229920001155 polypropylene Polymers 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229920001400 block copolymer Polymers 0.000 description 4
- 239000003063 flame retardant Substances 0.000 description 4
- 229920001903 high density polyethylene Polymers 0.000 description 4
- 239000004700 high-density polyethylene Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000000454 talc Substances 0.000 description 4
- 229910052623 talc Inorganic materials 0.000 description 4
- 150000001735 carboxylic acids Chemical class 0.000 description 3
- 238000007334 copolymerization reaction Methods 0.000 description 3
- 239000007822 coupling agent Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920005672 polyolefin resin Polymers 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- 239000013585 weight reducing agent Substances 0.000 description 3
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- VEORPZCZECFIRK-UHFFFAOYSA-N 3,3',5,5'-tetrabromobisphenol A Chemical compound C=1C(Br)=C(O)C(Br)=CC=1C(C)(C)C1=CC(Br)=C(O)C(Br)=C1 VEORPZCZECFIRK-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical group C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 239000006087 Silane Coupling Agent Substances 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- UORVGPXVDQYIDP-UHFFFAOYSA-N borane Chemical compound B UORVGPXVDQYIDP-UHFFFAOYSA-N 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 2
- HNEGQIOMVPPMNR-IHWYPQMZSA-N citraconic acid Chemical compound OC(=O)C(/C)=C\C(O)=O HNEGQIOMVPPMNR-IHWYPQMZSA-N 0.000 description 2
- 229940018557 citraconic acid Drugs 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 229920005674 ethylene-propylene random copolymer Polymers 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000011359 shock absorbing material Substances 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- 239000012756 surface treatment agent Substances 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- 239000004711 α-olefin Substances 0.000 description 2
- NDRKXFLZSRHAJE-UHFFFAOYSA-N 1,2,3,4,5-pentabromo-6-(2,3,4-tribromophenyl)benzene Chemical group BrC1=C(Br)C(Br)=CC=C1C1=C(Br)C(Br)=C(Br)C(Br)=C1Br NDRKXFLZSRHAJE-UHFFFAOYSA-N 0.000 description 1
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 1
- JNPCNDJVEUEFBO-UHFFFAOYSA-N 1-butylpyrrole-2,5-dione Chemical compound CCCCN1C(=O)C=CC1=O JNPCNDJVEUEFBO-UHFFFAOYSA-N 0.000 description 1
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- OXYZDRAJMHGSMW-UHFFFAOYSA-N 3-chloropropyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)CCCCl OXYZDRAJMHGSMW-UHFFFAOYSA-N 0.000 description 1
- OFNISBHGPNMTMS-UHFFFAOYSA-N 3-methylideneoxolane-2,5-dione Chemical compound C=C1CC(=O)OC1=O OFNISBHGPNMTMS-UHFFFAOYSA-N 0.000 description 1
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 description 1
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- UIERETOOQGIECD-UHFFFAOYSA-N Angelic acid Natural products CC=C(C)C(O)=O UIERETOOQGIECD-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 241001448862 Croton Species 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- XLYMOEINVGRTEX-ARJAWSKDSA-N Ethyl hydrogen fumarate Chemical compound CCOC(=O)\C=C/C(O)=O XLYMOEINVGRTEX-ARJAWSKDSA-N 0.000 description 1
- PEEHTFAAVSWFBL-UHFFFAOYSA-N Maleimide Chemical compound O=C1NC(=O)C=C1 PEEHTFAAVSWFBL-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- UIERETOOQGIECD-ARJAWSKDSA-N angelic acid Chemical compound C\C=C(\C)C(O)=O UIERETOOQGIECD-ARJAWSKDSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910000085 borane Inorganic materials 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- WHHGLZMJPXIBIX-UHFFFAOYSA-N decabromodiphenyl ether Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1OC1=C(Br)C(Br)=C(Br)C(Br)=C1Br WHHGLZMJPXIBIX-UHFFFAOYSA-N 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- BEFDCLMNVWHSGT-UHFFFAOYSA-N ethenylcyclopentane Chemical compound C=CC1CCCC1 BEFDCLMNVWHSGT-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- XLYMOEINVGRTEX-UHFFFAOYSA-N fumaric acid monoethyl ester Natural products CCOC(=O)C=CC(O)=O XLYMOEINVGRTEX-UHFFFAOYSA-N 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000010102 injection blow moulding Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- FSQQTNAZHBEJLS-UPHRSURJSA-N maleamic acid Chemical compound NC(=O)\C=C/C(O)=O FSQQTNAZHBEJLS-UPHRSURJSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- HNEGQIOMVPPMNR-NSCUHMNNSA-N mesaconic acid Chemical compound OC(=O)C(/C)=C/C(O)=O HNEGQIOMVPPMNR-NSCUHMNNSA-N 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- HNEGQIOMVPPMNR-UHFFFAOYSA-N methylfumaric acid Natural products OC(=O)C(C)=CC(O)=O HNEGQIOMVPPMNR-UHFFFAOYSA-N 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- KBJFYLLAMSZSOG-UHFFFAOYSA-N n-(3-trimethoxysilylpropyl)aniline Chemical compound CO[Si](OC)(OC)CCCNC1=CC=CC=C1 KBJFYLLAMSZSOG-UHFFFAOYSA-N 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229940047670 sodium acrylate Drugs 0.000 description 1
- SONHXMAHPHADTF-UHFFFAOYSA-M sodium;2-methylprop-2-enoate Chemical compound [Na+].CC(=C)C([O-])=O SONHXMAHPHADTF-UHFFFAOYSA-M 0.000 description 1
- 239000004334 sorbic acid Substances 0.000 description 1
- 229940075582 sorbic acid Drugs 0.000 description 1
- 235000010199 sorbic acid Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical compound CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 description 1
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 150000003673 urethanes Chemical class 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 229910052726 zirconium Inorganic materials 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
- B29C2049/2017—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements outside the article
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- 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
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3044—Bumpers
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ブロー成形されるバン
パービームに係り、特に自動車のリア用のバンパービー
ム等に利用できる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blow-molded bumper beam, and more particularly to a bumper beam for the rear of an automobile.
【０００２】[0002]
【背景技術】従来より、自動車用のバンパービームとし
ては、主に鉄などの金属製のバンパービームが用いられ
ていたが、鉄などでは軽量化や防錆が困難であることか
ら、近年、プラスチック製のバンパービームが用いられ
るようになった。BACKGROUND ART Conventionally, a bumper beam made of metal such as iron has been mainly used as a bumper beam for automobiles. However, since it is difficult to reduce the weight and prevent rust with iron or the like, plastic bumpers have recently been used. Bumper beams made of steel have come to be used.
【０００３】このプラスチック製のバンパービームにお
いては、軽量化と強度の向上とが図れるような構造が求
められており、本出願人も肉厚を厚くするなどの重量を
増加させることなく強度を向上させることができるリブ
構造（断面構造）を有するとともに、ブロー成形によっ
て容易にかつ一体的に成形することができるバンパービ
ームとして、特開平４−１２０１４５号公報、特開平４
−１２６７５５号公報、特開平５−９２７４４号公報に
それぞれ記載されているようなバンパービームを既に提
案している。The plastic bumper beam is required to have a structure that can reduce the weight and improve the strength, and the applicant has improved the strength without increasing the weight such as increasing the wall thickness. As a bumper beam that has a rib structure (cross-sectional structure) that can be formed and that can be easily and integrally molded by blow molding, JP-A-4-120145 and JP-A-4-120145.
Bumper beams such as those described in JP-A-126755 and JP-A-5-92744 have already been proposed.
【０００４】図６に、本出願人が提案したバンパービー
ム６０を示す。バンパービーム６０は、中空板状とされ
た上枠部６１および下枠部６２の前方側縁側（バンパー
ビームを車体に取り付けた際に、その車体取付側の面に
対向する面側）を側縁部６３によって連結され、断面略
コ字状に形成されたバンパービーム本体６４のみで構成
されていた。FIG. 6 shows a bumper beam 60 proposed by the present applicant. The bumper beam 60 has side edges on the front side edges of the hollow frame-shaped upper frame portion 61 and the lower frame portion 62 (the surface side that faces the vehicle body mounting side surface when the bumper beam is mounted on the vehicle body). The bumper beam main body 64 is connected only by the portion 63 and has a substantially U-shaped cross section.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、このバ
ンパービーム６０は、自動車のフロント（前側）用バン
パービームとしては十分な強度を備えているが、フロン
ト用に比べて強度要求レベルの高いリア（後ろ側）用の
バンパービームとして用いるには、バンパービーム６０
の肉厚を厚くして強度を向上させなければならず、重量
が大幅に増加するという問題があった。特に、リア用の
バンパービームは、安全性能の要求の高まりに応じて、
５マイル／時ポールテスト（自動車にバンパービームを
装着し、時速５マイルで金属製のポールに衝突させてバ
ンパービームの変形量を測定するテスト）という厳しい
テストに合格するものが要求されるようになり、バンパ
ービーム６０でこのテストに合格するためには、その重
量を大幅に増加させなければならないという問題があっ
た。However, although the bumper beam 60 has sufficient strength as a front (front) bumper beam of an automobile, the bumper beam 60 has a higher strength required level than the front bumper beam (rear). Side) bumper beam 60
Had to be thickened to improve the strength, resulting in a significant increase in weight. In particular, the bumper beam for the rear, in response to the increasing demand for safety performance,
5 mph / hour pole test (a test in which a bumper beam is mounted on an automobile and the deformation of the bumper beam is measured by colliding with a metal pole at 5 mph) is required to pass the strict test. However, in order to pass this test with the bumper beam 60, there is a problem in that the weight of the bumper beam 60 must be significantly increased.
【０００６】本発明の目的は、強度が高くかつ軽量化も
図ることができ、強度要求レベルの高い５マイル／時ポ
ールテストにも合格可能なブロー成形バンパービームを
提供することにある。An object of the present invention is to provide a blow-molded bumper beam which has a high strength and can be made lighter in weight, and which can also pass a 5 mile / hour pole test, which has a high strength required level.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、強度およ
び軽量性を共に満足できるブロー成形バンパービームを
開発すべく鋭意研究を重ねた結果、樹脂製の補強材をバ
ンパービーム本体内にインサートするとともに、そのイ
ンサート構造を適切に設定することで、その目的を達成
しうることを見出し、この知見に基づいて本発明を完成
するに至ったものである。[Means for Solving the Problems] As a result of intensive research conducted by the present inventors to develop a blow-molded bumper beam capable of satisfying both strength and lightness, a resin-made reinforcing material is inserted into the bumper beam body. In addition, it was found that the object can be achieved by appropriately setting the insert structure, and the present invention has been completed based on this finding.
【０００８】すなわち、本発明は、樹脂製のバンパービ
ーム本体をブロー成形する際に、前記バンパービーム本
体内に樹脂製の補強材をインサート成形して二重構造と
されたブロー成形バンパービームであって、前記補強材
をその長手方向の寸法が、少なくともバンパービーム本
体に設けられた車体側への取付部材（ステイ）間の間隔
以上（取付部材間の間隔と同じかあるいはそれ以上）の
長さを有するように構成し、また長手方向に直交する前
後方向（バンパービームを自動車に取り付けたときの自
動車の前後方向つまり進行方向）の長さ寸法が前記バン
パービーム本体の前後方向の長さ寸法とほぼ同じとなる
ように形成し、さらに、この補強材の周面を前記バンパ
ービーム本体で被覆（包み覆う）したことを特徴とする
ものである。That is, the present invention is a blow-molded bumper beam having a double structure by insert-molding a resin-made reinforcing material into the bumper beam body when the resin-made bumper beam body is blow-molded. The length of the reinforcing member in the longitudinal direction is at least the distance between the mounting members (stays) provided on the bumper beam body and attached to the vehicle body (the same as or greater than the distance between the mounting members). And the length dimension in the front-rear direction (the front-rear direction of the vehicle when the bumper beam is attached to the vehicle, that is, the advancing direction) orthogonal to the longitudinal direction is the same as the longitudinal dimension of the bumper beam body. It is characterized in that they are formed to have substantially the same shape, and that the peripheral surface of this reinforcing material is covered (wrapped) with the bumper beam main body.
【０００９】この際、前記補強材を、その長手方向直交
断面が略方形枠状となるように、つまり略四角筒状に形
成して前記バンパービーム本体の上下方向の中間部に配
置し、前記バンパービーム本体の前記補強材の上下位置
部分を、その長手方向直交断面が略方形枠状とされた上
枠部および下枠部から構成することが好ましい。この状
態では、補強材の前後面および上下面はバンパービーム
本体で被覆される。ここで、補強材の上下面を覆うバン
パービーム本体部分を、前記上枠部および下枠部の一部
として構成すれば、構造が簡易となり、加工も容易とな
る点で有利である。At this time, the reinforcing member is formed so that its longitudinal cross section becomes a substantially rectangular frame shape, that is, it is formed in a substantially rectangular tube shape, and is arranged at an intermediate portion in the vertical direction of the bumper beam main body. It is preferable that the upper and lower positions of the reinforcing member of the bumper beam main body are composed of an upper frame portion and a lower frame portion whose cross section orthogonal to the longitudinal direction is a substantially rectangular frame shape. In this state, the front and rear surfaces and the upper and lower surfaces of the reinforcing material are covered with the bumper beam main body. Here, if the bumper beam main body portion covering the upper and lower surfaces of the reinforcing member is formed as a part of the upper frame portion and the lower frame portion, it is advantageous in that the structure is simple and the processing is easy.
【００１０】なお、バンパービーム本体および補強材の
材質は特に限定されないが、バンパービーム本体として
は、例えばメルトインデックスが０．１〜３のポリプロ
ピレン系樹脂７０〜９９重量％と、平均粒子径１０μｍ
以下および平均アスペクト比３〜２０のタルク１〜３０
重量％とからなる樹脂組成物が好ましい。また、この組
成物に、１〜１０重量％の範囲でＨＤＰＥ（高密度ポリ
エチレン）を混ぜてもよい。補強材としては、例えば、
（Ａ）メルトインデックス１０ｇ／１０分以上のプロピ
レン単独重合体又はプロピレン−エチレン共重合体２０
〜６０重量％とガラス繊維８０〜４０重量％とから成
り、ペレット長が２〜２０ｍｍで、かつ、該ガラス繊維
長がペレット長に実質上等しいペレット５〜７０重量部
と、（Ｂ）メルトインデックスが３〜２０ｇ／１０分で
アイソタクチックペンタッド分率が９３％以上のプロピ
レン単独重合体又はプロピレン−エチレン共重合体９５
〜３０重量部と、を全量が１００重量部になるように混
合したガラス繊維強化ポリオレフィン樹脂組成物や、
（Ａ’）メルトインデックス１０ｇ／１０分以上のプロ
ピレン単独重合体又はプロピレン−エチレン共重合体２
０〜６０重量％とガラス繊維８０〜４０重量％とから成
る混合物１００重量部に対し、酸付加量０．１〜１０重
量％の酸変性ポリオレフィン１〜１０重量部を配合して
成り、ペレット長が２〜２０ｍｍで、かつ、該ガラス繊
維長がペレット長に実質上等しいペレット５〜７０重量
部と、（Ｂ）メルトインデックスが０．１〜２０ｇ／１
０分で、アイソタクチックペンタッド分率が９３％以上
のプロピレン単独重合体又はプロピレン−エチレン共重
合体９５〜３０重量部と、を全量が１００重量部になる
ように混合したガラス繊維強化ポリオレフィン樹脂組成
物等が用いられる。The material of the bumper beam body and the reinforcing material is not particularly limited, but as the bumper beam body, for example, 70 to 99% by weight of a polypropylene resin having a melt index of 0.1 to 3 and an average particle diameter of 10 μm.
Below and talc 1-30 with average aspect ratio 3-20
A resin composition consisting of 10% by weight is preferable. Further, HDPE (high density polyethylene) may be mixed with this composition in the range of 1 to 10% by weight. As the reinforcing material, for example,
(A) Propylene homopolymer or propylene-ethylene copolymer 20 having a melt index of 10 g / 10 minutes or more
5 to 70 parts by weight of pellets consisting of -60% by weight and 80 to 40% by weight of glass fiber, having a pellet length of 2 to 20 mm, and the glass fiber length being substantially equal to the pellet length, and (B) melt index. Is 3 to 20 g / 10 minutes and has an isotactic pentad fraction of 93% or more. Propylene homopolymer or propylene-ethylene copolymer 95
Glass fiber reinforced polyolefin resin composition obtained by mixing 30 to 30 parts by weight so that the total amount becomes 100 parts by weight,
(A ') Melt index 10 g / 10 min or more propylene homopolymer or propylene-ethylene copolymer 2
The pellet length is formed by mixing 1 to 10 parts by weight of an acid-modified polyolefin having an acid addition amount of 0.1 to 10% by weight with 100 parts by weight of a mixture of 0 to 60% by weight and 80 to 40% by weight of glass fiber. Of 2 to 20 mm and the glass fiber length is substantially equal to the pellet length of 5 to 70 parts by weight, and (B) the melt index is 0.1 to 20 g / 1.
Glass fiber reinforced polyolefin obtained by mixing 95 to 30 parts by weight of propylene homopolymer or propylene-ethylene copolymer having an isotactic pentad fraction of 93% or more at 0 minutes so that the total amount becomes 100 parts by weight. A resin composition or the like is used.
【００１１】[0011]
【作用】このような本発明においては、バンパービーム
内に所定寸法の補強材が所定構造でインサートされてい
るため、バンパービームの軽量化が図れ、強度も向上す
る。すなわち、長手方向の寸法がバンパービーム本体の
取付部材間の間隔寸法以上である補強材を用いているた
め、バンパービームを取付部材間に跨るように配置する
ことができ、これによりバンパービームに加わる荷重は
補強材を介して取付部材で受けとめられてバンパービー
ム本体で受けとめる荷重は少なくなる。このため、バン
パービーム本体の肉厚を厚くして強度を高める必要がな
いため、バンパービーム全体の軽量化が図れる。また、
補強材の前後方向の寸法をバンパービーム本体の前後方
向の寸法とほぼ同じ、つまりインサート状態の補強材の
前後方向をできるだけ長くしたので、バンパービームに
対する前後方向（自動車に取付られたバンパーが通常衝
突する方向、ポールテストにおいても衝突方向）からの
衝撃に対する剛性が高まる。さらに、補強材の周面をバ
ンパービーム本体で被覆しているので、補強材とバンパ
ービーム本体とが互いに補強しあって荷重に対処するた
め、バンパービーム全体の強度が向上される。In the present invention as described above, since the reinforcing material having a predetermined size is inserted into the bumper beam with a predetermined structure, the bumper beam can be reduced in weight and its strength can be improved. That is, since the reinforcing member whose longitudinal dimension is equal to or larger than the interval dimension between the mounting members of the bumper beam main body is used, the bumper beam can be arranged so as to straddle between the mounting members, thereby adding to the bumper beam. The load is received by the mounting member via the reinforcing member, and the load received by the bumper beam body is reduced. Therefore, it is not necessary to increase the wall thickness of the bumper beam body to increase the strength, and thus the weight of the entire bumper beam can be reduced. Also,
The front-rear dimension of the reinforcement is almost the same as the front-rear dimension of the bumper beam body, that is, the front-rear direction of the reinforcement in the inserted state is made as long as possible, so The rigidity against the impact from the direction of collision, the direction of collision even in the pole test) is increased. Further, since the peripheral surface of the reinforcing member is covered with the bumper beam main body, the reinforcing member and the bumper beam main body reinforce each other to cope with the load, so that the strength of the entire bumper beam is improved.
【００１２】以上のように、本発明においては、構造的
な設定によってバンパービーム全体の強度が向上するた
め、バンパービーム本体や補強材の肉厚を厚くして（重
量を増加させて）強度を向上させる必要がなくなり、軽
量化を図りつつ５マイル／時ポールテストに合格するの
に十分な強度が確保される。As described above, in the present invention, since the strength of the entire bumper beam is improved by the structural setting, the thickness of the bumper beam main body and the reinforcing material is increased (the weight is increased) to increase the strength. It doesn't need to be improved and is light enough to be strong enough to pass the 5 mph pole test.
【００１３】[0013]
【実施例】以下、本発明の一実施例を図面に基づいて説
明する。図１には、本実施例のバンパービーム１の略半
分の構造が示されている。また、図２にはバンパービー
ム１の上面図が示され、図３にはバンパービーム１の長
手方向直交断面構造が示されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the structure of almost half of the bumper beam 1 of this embodiment. 2 shows a top view of the bumper beam 1, and FIG. 3 shows a cross-sectional structure orthogonal to the longitudinal direction of the bumper beam 1.
【００１４】バンパービーム１は、成形品の主な外観形
状を形成するバンパービーム本体２と、この本体２内部
にインサート成形された補強材３とを備えている。The bumper beam 1 is provided with a bumper beam main body 2 which forms the main external shape of a molded product, and a reinforcing member 3 which is insert-molded inside the main body 2.
【００１５】バンパービーム本体２は、図２に示すよう
に、その長手方向が前面側（車体取付面に対向する側、
フロントバンパーとして図示しない車体に装着する場合
には車体前方側、リアバンパーとして車体に装着する場
合には車体後方側）に向かって凸の弓状に湾曲されてい
る。本体２の長手方向直交断面は、図３に示すように、
補強材３の周面を被覆する略方形枠状の被覆部２Ａとこ
の被覆部２Ａの上下にそれぞれ設けられ、被覆部２Ａを
一部含んで略方形枠状（中空状）に形成された上枠部２
Ｂおよび下枠部２Ｃを備えた形状とされている。As shown in FIG. 2, the bumper beam main body 2 has its longitudinal direction on the front side (the side facing the vehicle body mounting surface,
When it is mounted on a vehicle body (not shown) as a front bumper, it is curved in a convex bow shape toward the vehicle body front side, and when it is mounted on the vehicle body as a rear bumper). As shown in FIG. 3, the cross section of the main body 2 orthogonal to the longitudinal direction is
A substantially rectangular frame-shaped covering portion 2A for covering the peripheral surface of the reinforcing member 3 and upper and lower portions of the covering portion 2A, which are formed in a substantially rectangular frame shape (hollow shape) including a part of the covering portion 2A. Frame 2
It has a shape including B and the lower frame portion 2C.
【００１６】バンパービーム本体２の内部にインサート
成形される補強材３は、ブロー成形により形成されたも
のである。この補強材３は、本体２の略全長にわたって
本体２と同様に弓状に延長配置されるとともに、長手方
向直交断面が略台形の中空状とされている。つまり、補
強材３は、図３にも示すように、その前面３Ａ（車体取
付面に対向する面側）は、後面３Ｂ（車体取付面側）よ
りも短辺とされ、これらの前面３Ａおよび後面３Ｂの両
端縁間を水平方向に対して僅かに傾斜された傾斜面３
Ｃ，３Ｄが連結するように一体成形されている。また、
図４にも示すように、補強材３の両端には車体連結用の
ステイ４がそれぞれ配置されている。このステイ４は、
金属や樹脂などによって形成されるとともに、複数本例
えば３本のボルト５が一体に固定され、バンパービーム
１の車体（図示せず）への取付けが容易にできるように
なっている。The reinforcing material 3 that is insert-molded inside the bumper beam body 2 is formed by blow molding. The reinforcing member 3 is arranged to extend in an arc shape over the entire length of the main body 2 in the same manner as the main body 2, and has a substantially trapezoidal hollow cross section in the longitudinal direction. That is, as shown in FIG. 3, the reinforcing member 3 has its front surface 3A (the surface side facing the vehicle body mounting surface) shorter than the rear surface 3B (vehicle body mounting surface side). An inclined surface 3 slightly inclined with respect to the horizontal direction between both edges of the rear surface 3B.
It is integrally molded so that C and 3D are connected. Also,
As shown in FIG. 4, stays 4 for connecting the vehicle bodies are arranged at both ends of the reinforcing member 3. This stay 4 is
The bolts 5 are made of metal or resin, and a plurality of, for example, three bolts 5 are integrally fixed to the bumper beam 1 so that the bumper beam 1 can be easily attached to a vehicle body (not shown).
【００１７】バンパービーム本体２および補強材３は、
ブロー成形用のグレードとして市販されている各種ポリ
プロピレンをはじめとする種々の樹脂を用いることがで
きる。特に軽量でかつ機械的強度が高く、耐久性や耐衝
撃性に優れたものとして本出願人が先に提案したブロー
成形材料を用いることが好ましい（特願平５−２７６６
６８号参照）。この材料は、（Ａ）メルトインデックス
が１０ｇ／１０分以上のプロピレン単独重合体又はプロ
ピレン−エチレン共重合体２０〜６０重量％とガラス繊
維８０〜４０重量％とから成り、ペレット長が２〜２０
ｍｍで、かつ、該ガラス繊維長がペレット長に実質上等
しいペレット５〜７０重量部、又は、（Ａ’）メルトイ
ンデックス１０ｇ／１０分以上のプロピレン単独重合体
又はプロピレン−エチレン共重合体２０〜６０重量％と
ガラス繊維８０〜４０重量％とから成る混合物１００重
量部に対し、酸付加量０．１〜１０重量％の酸変性ポリ
オレフィン１〜１０重量部を配合して成り、ペレット長
が２〜２０ｍｍで、かつ、該ガラス繊維長がペレット長
に実質上等しいペレット５〜７０重量部と、（Ｂ）メル
トインデックスが０．１〜２０ｇ／１０分で、アイソタ
クチックペンタッド分率が９３％以上のプロピレン単独
重合体又はプロピレン−エチレン共重合体９５〜３０重
量部とを全量が１００重量部になるように混合したガラ
ス繊維強化ポリオレフィン樹脂組成物により構成されて
いる。The bumper beam body 2 and the reinforcing member 3 are
Various resins, including various polypropylenes commercially available as blow molding grades, can be used. In particular, it is preferable to use the blow molding material previously proposed by the applicant of the present invention as a material that is lightweight, has high mechanical strength, and is excellent in durability and impact resistance (Japanese Patent Application No. 5-2766).
68). This material comprises (A) 20 to 60% by weight of propylene homopolymer or propylene-ethylene copolymer having a melt index of 10 g / 10 minutes or more and 80 to 40% by weight of glass fiber, and a pellet length of 2 to 20.
mm, and the glass fiber length is substantially equal to the pellet length, 5 to 70 parts by weight of the pellet, or (A ′) a propylene homopolymer or a propylene-ethylene copolymer having a melt index of 10 g / 10 minutes or more 20 to 1 to 10 parts by weight of an acid-modified polyolefin having an acid addition amount of 0.1 to 10% by weight is mixed with 100 parts by weight of a mixture of 60% by weight and 80 to 40% by weight of glass fiber, and a pellet length is 2 5 to 70 parts by weight of pellets having a glass fiber length of substantially 20 mm and the glass fiber length being substantially equal to the pellet length, (B) a melt index of 0.1 to 20 g / 10 minutes, and an isotactic pentad fraction of 93. % Of propylene homopolymer or 95 to 30 parts by weight of propylene-ethylene copolymer so that the total amount becomes 100 parts by weight. It is composed of a fin resin composition.
【００１８】この際、（Ａ）成分又は（Ａ’）成分にお
いては、メルトインデックス（ＭＩ）が１０ｇ／１０分
以上のプロピレン単独重合体又はプロピレン−エチレン
共重合体が用いられる。このＭＩが１０ｇ／１０分未満
では樹脂の含浸性が不足し、生産量を上げた場合、ガラ
ス繊維の分散不良が発生するおそれがあり、成形時に繊
維が破断しやすい。前述のプロピレン−エチレン共重合
体としては、結晶性のプロピレン−エチレンブロック共
重合体が好適である。このプロピレン−エチレンブロッ
ク共重合体としては、通常エチレン単位の含有量が少な
い、例えば、0.01〜２重量％程度のエチレンプロピレン
ランダム共重合体からなる共重合部又はプロピレン単独
重合体から成るホモ重合部と、エチレン単位の含有量が
比較的多い、例えば、１０〜７０重量％程度のエチレン
プロピレンランダム共重合体から成る共重合部とから構
成された、いわゆる結晶性プロピレン−エチレンブロッ
ク共重合体として市販されているものを用いることがで
きる。また、このプロピレン−エチレンブロック共重合
体は、前記ホモ重合部又は共重合部がブテン−１などの
α−オレフィン単位を適当な割合で含有するものであっ
てもよい。At this time, as the component (A) or the component (A '), a propylene homopolymer or a propylene-ethylene copolymer having a melt index (MI) of 10 g / 10 minutes or more is used. If the MI is less than 10 g / 10 minutes, the impregnating property of the resin will be insufficient, and if the production amount is increased, the glass fibers may be poorly dispersed, and the fibers are likely to break during molding. As the above-mentioned propylene-ethylene copolymer, a crystalline propylene-ethylene block copolymer is suitable. The propylene-ethylene block copolymer usually has a low content of ethylene units, for example, a copolymerization part composed of an ethylene-propylene random copolymer of about 0.01 to 2% by weight or a homopolymerization part composed of a propylene homopolymer. And a relatively large content of ethylene units, for example, a so-called crystalline propylene-ethylene block copolymer, which is commercially available as a so-called copolymerized part consisting of an ethylene-propylene random copolymer of about 10 to 70% by weight. What has been done can be used. Further, in the propylene-ethylene block copolymer, the homopolymerization part or the copolymerization part may contain an α-olefin unit such as butene-1 in an appropriate ratio.
【００１９】また、（Ａ）成分又は（Ａ’）成分におい
て用いられるガラス繊維としては、含アルカリガラス、
低アルカリガラス、無アルカリガラスのいずれであって
もよく、また形態については、ロービングが好ましく用
いられる。このガラス繊維は適当な表面処理剤で処理し
て用いてもよい。前記表面処理剤としては、例えばシラ
ン系、チタネート系、アルミニウム系、クロム系、ジル
コニウム系、ボラン系カップリング剤などが挙げられる
が、これらの中でシラン系カップリング剤及びチタネー
ト系カップリング剤が好ましく、特にシラン系カップリ
ング剤が好適である。このシラン系カップリング剤とし
ては、例えばトリエトキシシラン、ビニルトリス（β−
メトキシエトキシ）シラン、γ−メタクリロキシプロピ
ルトリメトキシシラン、γ−グリシドキシプロピルトリ
メトキシシラン、β−（３，４−エポキシシクロヘキシ
ル）エチルトリメトキシシラン、Ｎ−β−（アミノエチ
ル）−γ−アミノプロピルトリメトキシシラン、Ｎ−β
−（アミノエチル）−γ−アミノプロピルメチルジメト
キシシラン、γ−アミノプロピルトリエトキシシラン、
Ｎ−フェニル−γ−アミノプロピルトリメトキシシラ
ン、γ−メトカプトプロピルトリメトキシシラン、γ−
クロロプロピルトリメトキシシランなどが挙げられる。
これらの中でもγ−アミノプロピルトリエトキシシラ
ン、Ｎ−β−（アミノエチル）−γ−アミノプロピルト
リメトキシシランが好適である。As the glass fiber used in the component (A) or the component (A '), alkali-containing glass,
Either low-alkali glass or alkali-free glass may be used, and morphing is preferably roving. This glass fiber may be treated with an appropriate surface treating agent before use. Examples of the surface treatment agent include silane-based, titanate-based, aluminum-based, chromium-based, zirconium-based, borane-based coupling agents and the like. Among these, silane-based coupling agents and titanate-based coupling agents are included. A silane coupling agent is particularly preferable. Examples of the silane coupling agent include triethoxysilane and vinyl tris (β-
(Methoxyethoxy) silane, γ-methacryloxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, N-β- (aminoethyl) -γ- Aminopropyltrimethoxysilane, N-β
-(Aminoethyl) -γ-aminopropylmethyldimethoxysilane, γ-aminopropyltriethoxysilane,
N-phenyl-γ-aminopropyltrimethoxysilane, γ-methcaptopropyltrimethoxysilane, γ-
Examples include chloropropyltrimethoxysilane.
Among these, γ-aminopropyltriethoxysilane and N-β- (aminoethyl) -γ-aminopropyltrimethoxysilane are preferable.
【００２０】ガラス繊維を前記表面処理剤で処理する方
法については特に制限はなく、従来慣用されている方
法、例えば水溶液法、有機溶媒法、スプレー法など、任
意の方法を用いることができる。通常このようにして表
面処理された平均繊維径３〜２０μｍのガラス繊維を適
当な収束剤で収束したガラスロービングが用いられる。
この収束剤としては、例えばウレタン系、アクリル系、
ブタジエン系、エポキシ系などがあり、いずれも用いる
ことができるが、これらの内ウレタン系が好ましい。こ
のウレタン系収束剤は、通常ジイソシアネート化合物と
多価アルコールとの重付加反応により得られるポリイソ
シアネートを５０重量％以上の割合で含有するものであ
って、油変性型、湿気硬化型、ブロック型などの１液タ
イプ及び触媒硬化型、ポリオール硬化型などの２液タイ
プがあるが、いずれも用いることができる。The method of treating the glass fiber with the surface treatment agent is not particularly limited, and any conventionally used method such as an aqueous solution method, an organic solvent method, or a spray method can be used. Usually, glass roving is used in which glass fibers having an average fiber diameter of 3 to 20 μm which have been surface-treated in this manner are bundled with an appropriate sizing agent.
Examples of the sizing agent include urethane-based, acrylic-based,
There are butadiene type, epoxy type and the like, and any of them can be used, but among these, urethane type is preferable. This urethane-based sizing agent usually contains polyisocyanate obtained by polyaddition reaction of diisocyanate compound and polyhydric alcohol in a proportion of 50% by weight or more, and is oil-modified, moisture-curable, block-type, etc. There is a one-pack type and a two-pack type such as a catalyst-curing type and a polyol-curing type, and both can be used.
【００２１】前記プロピレン単独重合体又はプロピレン
−エチレン共重合体とガラス繊維とは、それぞれ２０〜
６０重量％と８０〜４０重量％との割合で配合すること
が必要である。ガラス繊維の量が４０重量％未満では引
抜きが困難であるとともに経済的に不利であるし、８０
重量％を超えると樹脂の含浸性が低下して、ガラス繊維
の分散不良が発生する。The propylene homopolymer or propylene-ethylene copolymer and the glass fiber are each 20 to 20%.
It is necessary to mix 60% by weight and 80-40% by weight. If the amount of glass fiber is less than 40% by weight, it is difficult to draw out and it is economically disadvantageous.
When the content is more than wt%, the impregnating property of the resin is deteriorated, resulting in poor dispersion of the glass fiber.
【００２２】また、バンパービーム本体２や補強材３に
用いられる組成物においては、得られるガラス繊維強化
ポリオレフィン樹脂組成物の強度を更に向上させるため
に、所望により前記樹脂成分とガラス繊維との混合物
に、更に酸変性ポリオレフィンを配合してもよい。この
酸変性ポリオレフィンに使用されるポリオレフィンとし
ては、例えばポリプロピレンや、ポリエチレン、エチレ
ン−α−オレフィン共重合ゴム、エチレン−α−オレフ
ィン−非共役ジエン系化合物共重合体（例えばＥＰＤＭ
など）、エチレン−芳香族モノビニル化合物−共役ジエ
ン系化合物共重合ゴムなどが用いられる。また、前記α
−オレフィンとしては、例えばプロピレン、ブテン−
１、ペンテン−１、ヘキセン−１、４−メチルペンテン
−１などが挙げられ、これらは１種用いてもよいし、２
種以上を組み合わせて用いてもよい。これらのポリオレ
フィンの中では、ホモポリプロピレンが好ましい。In the composition used for the bumper beam main body 2 and the reinforcing material 3, in order to further improve the strength of the glass fiber reinforced polyolefin resin composition obtained, a mixture of the resin component and glass fiber is optionally added. In addition, an acid-modified polyolefin may be further added. Examples of the polyolefin used for the acid-modified polyolefin include polypropylene, polyethylene, ethylene-α-olefin copolymer rubber, ethylene-α-olefin-non-conjugated diene compound copolymer (eg EPDM).
Etc.), ethylene-aromatic monovinyl compound-conjugated diene compound copolymer rubber and the like are used. Also, the above α
-Examples of olefins include propylene and butene-
1, pentene-1, hexene-1, 4-methylpentene-1 and the like, and these may be used alone or in combination with 2
You may use it in combination of 2 or more types. Of these polyolefins, homopolypropylene is preferred.
【００２３】更に、変性に用いられるカルボン酸として
は、不飽和カルボン酸及びその誘導体が挙げられ、この
不飽和カルボン酸としては、例えばアクリル酸、メタク
リル酸、マレイン酸、フマル酸、イタコン酸、クロトン
酸、シトラコン酸、ソルビン酸、メサコン酸、アンゲリ
カ酸などが挙げられ、またその誘導体としては、酸無水
物、エステル、アミド、イミド、金属塩などがあり、例
えば無水マレイン酸、無水イタコン酸、無水シトラコン
酸、アクリル酸メチル、メタクリル酸メチル、アクリル
酸エチル、アクリル酸ブチル、マレイン酸モノエチルエ
ステル、アクリルアミド、マレイン酸モノアミド、マレ
イミド、Ｎ−ブチルマレイミド、アクリル酸ナトリウ
ム、メタクリル酸ナトリウムなどを挙げることができ、
特に無水マレイン酸が好ましい。Further, examples of the carboxylic acid used for modification include unsaturated carboxylic acids and their derivatives. Examples of the unsaturated carboxylic acids include acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, croton. Acid, citraconic acid, sorbic acid, mesaconic acid, angelic acid and the like, and its derivatives include acid anhydrides, esters, amides, imides, metal salts and the like, for example, maleic anhydride, itaconic anhydride, anhydrous. Examples thereof include citraconic acid, methyl acrylate, methyl methacrylate, ethyl acrylate, butyl acrylate, maleic acid monoethyl ester, acrylamide, maleic acid monoamide, maleimide, N-butyl maleimide, sodium acrylate and sodium methacrylate. You can
Maleic anhydride is particularly preferable.
【００２４】これらの不飽和カルボン酸やその誘導体
は、前記ポリオレフィンを変性する場合、１種用いても
よいし、２種以上を組み合わせてもよく、また変性方法
については特に制限はなく、公知の種々の方法を用いる
ことができる。例えばこのポリオレフィンを適当な有機
溶媒に溶解し、不飽和カルボン酸やその誘導体及びラジ
カル発生剤を添加してかきまぜ、加熱する方法、あるい
は前記各成分を押出機に供給してグラフト共重合を行う
方法などを用いることができる。These unsaturated carboxylic acids and their derivatives may be used alone or in combination of two or more when modifying the above-mentioned polyolefin, and the modification method is not particularly limited and is known. Various methods can be used. For example, a method in which this polyolefin is dissolved in an appropriate organic solvent, an unsaturated carboxylic acid or its derivative and a radical generator are added, and the mixture is stirred and heated, or a method in which the above components are supplied to an extruder to perform graft copolymerization Etc. can be used.
【００２５】この酸変性ポリオレフィンにおける酸付加
量は０．１〜１０重量％の範囲で選ばれる。この付加量
が０．１重量％未満では強度の改良効果が十分に発揮さ
れないし、１０重量％を超えるとこれ以上酸が付加され
にくく、むしろ付加されない酸が増え、機械的強度や衝
撃強度が低下する場合がある。この酸変性ポリオレフィ
ンは１種用いてもよいし、２種以上を組み合わせて用い
てもよく、また、その配合量は、前記樹脂成分とガラス
繊維との混合物１００重量部に対して、１〜１０重量部
の範囲で選ぶことが必要である。この量が１重量部未満
では強度の改良効果が十分に発揮されないし、１０重量
部を超えるとその量の割には強度の改良効果の向上はみ
られず、むしろ経済的に不利となる上、衝撃強度が低下
する場合がある。The acid addition amount in this acid-modified polyolefin is selected in the range of 0.1 to 10% by weight. If the added amount is less than 0.1% by weight, the effect of improving the strength is not sufficiently exerted, and if it exceeds 10% by weight, it is difficult to add more acid, and more acid is not added, and mechanical strength and impact strength are increased. It may decrease. This acid-modified polyolefin may be used alone or in combination of two or more, and the compounding amount thereof is from 1 to 10 relative to 100 parts by weight of the mixture of the resin component and the glass fiber. It is necessary to select within the range of parts by weight. If this amount is less than 1 part by weight, the effect of improving the strength is not sufficiently exerted, and if it exceeds 10 parts by weight, the effect of improving the strength is not increased for the amount, and it is rather economically disadvantageous. , The impact strength may decrease.
【００２６】前記（Ａ）成分又は（Ａ’）成分は、前記
のようにして得られた混合物を引抜き法により、長さが
２〜２０ｍｍになるようにペレットを調製することが必
要である。この場合、このペレット中のガラス繊維の長
さは、実質上ペレットの長さと等しくなる。このペレッ
トの長さが２ｍｍ未満では機械的強度及び衝撃強度が劣
るし、２０ｍｍを超えると成形時に分級が発生しやす
く、物性にバラツキが生じるとともに、成形時に噛み込
み不良などが発生しやすくなる。For the component (A) or the component (A '), it is necessary to prepare pellets so that the mixture obtained as described above has a length of 2 to 20 mm by a drawing method. In this case, the length of the glass fibers in this pellet will be substantially equal to the length of the pellet. If the length of the pellets is less than 2 mm, the mechanical strength and impact strength are poor, and if it exceeds 20 mm, classification tends to occur at the time of molding, resulting in variations in physical properties and defective biting at the time of molding.
【００２７】前記（Ｂ）成分としては、ＭＩが０．１〜
２０ｇ／１０分、好ましくは６〜１５ｇ／１０分のプロ
ピレン単独重合体又はプロピレン−エチレン共重合体が
用いられる。このプロピレン−エチレン共重合体として
は、前記（Ａ）成分又は（Ａ’）成分の場合と同じよう
なものを用いることができる。このＭＩが０．１ｇ／１
０分未満では剛性が低下し、成形に劣り、外観が不良に
なるとともに、ドライブレンド成形時に長繊維が破断し
やすくなり、材料として十分な剛性が得られない場合が
ある。一方、２０ｇ／１０分を超えると、長繊維ガラス
繊維を含有する場合においても、耐ドローダウン性が不
足し、成形ができない場合がある。The component (B) has MI of 0.1 to 0.1
20 g / 10 min, preferably 6 to 15 g / 10 min of propylene homopolymer or propylene-ethylene copolymer is used. As the propylene-ethylene copolymer, the same one as in the case of the component (A) or the component (A ′) can be used. This MI is 0.1g / 1
If it is less than 0 minutes, the rigidity is lowered, the molding is inferior, the appearance is deteriorated, and the long fibers are easily broken during the dry blend molding, so that sufficient rigidity may not be obtained as a material. On the other hand, if it exceeds 20 g / 10 minutes, the drawdown resistance may be insufficient and molding may not be possible even when the long glass fiber is contained.
【００２８】また、前記（Ｂ）成分のＭＩ領域では、通
常、ブロー成形は勿論、その他の押出し成形も困難であ
るが、前記（Ａ）成分又は（Ａ’）成分をブレンドする
ことにより、成形性が著しく向上し、ブロー成形可能と
なる。更に、一般のブロー成形用低ＭＩ（例えば、ＭＩ
が 0.5ｇ／１０分）のポリプロピレンに比べ、前記
（Ｂ）成分におけるＭＩ領域の方が、高結晶性のものが
得られ易く、かつ、成形時の繊維破断抑制効果もあるた
め、軽量で高強度の補強材３やバンパービーム本体２が
得られる。In the MI range of the component (B), it is usually difficult to perform blow molding and other extrusion molding, but by blending the component (A) or the component (A ′), The property is remarkably improved and blow molding becomes possible. Furthermore, a general low MI for blow molding (for example, MI
0.5 g / 10 min) of polypropylene, it is easier to obtain a highly crystalline MI region in the component (B), and the effect of suppressing fiber breakage during molding is also obtained, so it is lightweight and high. A strong reinforcing member 3 and a bumper beam main body 2 can be obtained.
【００２９】（Ｂ）成分としてアイソタクチックペンタ
ッド分率が９３％以上のプロピレン単独重合体又はプロ
ピレン−エチレン共重合体が用いられる。アイソタクチ
ックペンタッド分率が９３％未満では補強材３として十
分な剛性が得られない。前記（Ａ）成分又は（Ａ’）成
分５〜７０重量部と（Ｂ）成分９５〜３０重量部とを全
量が１００重量部になるように混合することが必要であ
る。（Ａ）成分又は（Ａ’）成分が５重量部未満では、
機械的強度及び衝撃強度が劣るし、７０重量部を超える
と成形性が低下し、外観不良となる。As the component (B), a propylene homopolymer or propylene-ethylene copolymer having an isotactic pentad fraction of 93% or more is used. If the isotactic pentad fraction is less than 93%, sufficient rigidity cannot be obtained as the reinforcing material 3. It is necessary to mix 5 to 70 parts by weight of the component (A) or (A ') and 95 to 30 parts by weight of the component (B) so that the total amount becomes 100 parts by weight. When the amount of the component (A) or the component (A ′) is less than 5 parts by weight,
Mechanical strength and impact strength are inferior, and when it exceeds 70 parts by weight, moldability is deteriorated, resulting in poor appearance.
【００３０】前記ガラス繊維強化ポリオレフィン樹脂組
成物には、所望に応じ、本発明の目的がそこなわれない
範囲で、前記ガラス繊維以外の繊維状強化剤、タルク、
マイカ、ガラスフレークなどの無機系充填剤や有機系充
填剤、他の熱可塑性樹脂、滑剤、着色剤、安定剤、酸化
防止剤、紫外線吸収剤、帯電防止剤、難燃剤、可塑剤、
耐候剤などを添加することができる。例えば、難燃性を
付与する目的で、樹脂組成物に所望に応じ各種のハロゲ
ン系難燃剤を配合することができる。難燃性の付与効果
を更に増すために、三酸化アンチモン等の難燃助剤と併
用することもできる。前記難燃剤としては、例えばデカ
ブロモジフェニルオキシド、テトラブロモビスフェノー
ルＡエポキシ系、オクタブロモジフェニルオキシド、テ
トラブロモビスフェノールＡ、テトラブロモブスフェノ
ールＳなどが挙げられる。If desired, the glass fiber-reinforced polyolefin resin composition may contain a fibrous reinforcing agent other than the glass fiber, talc, and / or talc, as long as the object of the present invention is not impaired.
Inorganic and organic fillers such as mica and glass flakes, other thermoplastic resins, lubricants, colorants, stabilizers, antioxidants, ultraviolet absorbers, antistatic agents, flame retardants, plasticizers,
Weathering agents and the like can be added. For example, various halogen-based flame retardants can be added to the resin composition as desired for the purpose of imparting flame retardancy. In order to further enhance the effect of imparting flame retardancy, it may be used in combination with a flame retardant aid such as antimony trioxide. Examples of the flame retardant include decabromodiphenyl oxide, tetrabromobisphenol A epoxy, octabromodiphenyl oxide, tetrabromobisphenol A, tetrabromobusphenol S, and the like.
【００３１】なお、バンパービーム本体２と補強材３と
は、上記材質のものに限らない。特に、上記のものは補
強材３の材質に適しており、バンパービーム本体２はブ
ロー成形用のグレードとして市販されている各種ポリプ
ロピレン等が利用できる。従って、バンパービーム本体
２と補強材３とは、同一材質のものに限らず、異なる材
質の樹脂を用いてもよい。The bumper beam body 2 and the reinforcing material 3 are not limited to the above materials. In particular, the above-mentioned materials are suitable for the material of the reinforcing material 3, and the bumper beam body 2 can be made of various polypropylene or the like which is commercially available as a grade for blow molding. Therefore, the bumper beam main body 2 and the reinforcing material 3 are not limited to the same material, and resins of different materials may be used.
【００３２】次に、本実施例のバンパービーム１の製造
手順について説明する。まず、補強材３を、例えば、前
記（Ａ）又は（Ａ’）成分と（Ｂ）成分とのドライブレ
ンド品をブロー成形機に直接供給することなどで成形す
る。そして、この予め成形した補強材３を金型１０に取
り付ける。この補強材３は、両端のステイ４を介して金
型１０に取り付けられたり、適宜なブラケットを介して
金型１０に取り付けられる。Next, a procedure for manufacturing the bumper beam 1 of this embodiment will be described. First, the reinforcing material 3 is molded, for example, by directly supplying a dry blended product of the component (A) or (A ′) and the component (B) to a blow molding machine. Then, the preformed reinforcing material 3 is attached to the mold 10. The reinforcing member 3 is attached to the mold 10 via the stays 4 at both ends, or is attached to the mold 10 via an appropriate bracket.
【００３３】次に、図５（Ａ）に示すように、図示しな
い押出装置等で溶融された樹脂をダイヘッド１１を通し
てパリソン１２を形成し、このパリソン１２を金型１０
間に送り出す。そして、図示しない型締め装置により金
型１０の型締めを行い、図５（Ｂ）に示すように、バン
パービーム本体２をブロー成形する。この際、補強材３
は、パリソン１２内に押し込まれ、それに伴い樹脂は図
５（Ａ）に示す補強材３と金型１０との隙間１３まで回
り込み、補強材３の各周囲（前面３Ａ、後面３Ｂ、傾斜
面３Ｃ，３Ｄ）はバンパービーム本体２で被覆される。Next, as shown in FIG. 5 (A), a resin melted by an extruding device (not shown) is passed through a die head 11 to form a parison 12, and the parison 12 is molded into a mold 10.
Send in the meantime. Then, the mold 10 is clamped by a mold clamping device (not shown), and the bumper beam main body 2 is blow-molded as shown in FIG. 5 (B). At this time, the reinforcing material 3
Is pushed into the parison 12, and accordingly the resin wraps around to the gap 13 between the reinforcing member 3 and the mold 10 shown in FIG. 5 (A), and the surroundings of the reinforcing member 3 (front surface 3A, rear surface 3B, inclined surface 3C). , 3D) is covered with the bumper beam body 2.
【００３４】このような本発明によれば、補強材３がバ
ンパービーム本体２の略全長にわたって形成されている
とともに、その両端が車体取付用のステイ４に接してい
るため、衝突等によりバンパービーム１に加わる荷重
は、樹脂製のバンパービーム本体２だけでなく、補強材
３を通してステイ４部分で受けとめることができ、バン
パービーム１全体の機械的強度を向上させることができ
る。According to the present invention as described above, since the reinforcing member 3 is formed over substantially the entire length of the bumper beam main body 2 and both ends thereof are in contact with the stay 4 for mounting on the vehicle body, the bumper beam is caused by a collision or the like. The load applied to 1 can be received not only by the bumper beam main body 2 made of resin but also by the stay 4 through the reinforcing member 3, and the mechanical strength of the entire bumper beam 1 can be improved.
【００３５】また、補強材３の前後方向の長さが、バン
パービーム本体２の前後方向の長さに略等しい寸法とさ
れているため、特に自動車の追突事故等のようにバンパ
ービーム１の前後方向からの衝撃に対する強度を向上さ
せることができる。Further, since the length of the reinforcing member 3 in the front-rear direction is substantially equal to the length of the bumper beam main body 2 in the front-rear direction, the front-rear direction of the bumper beam 1 is particularly noticeable in a rear-end collision of an automobile. The strength against impact from the direction can be improved.
【００３６】さらに、補強材３の周面をバンパービーム
本体２で被覆（包み覆う）して一体化しているので、例
えば補強材３に荷重が加わって補強材３が押された場合
などにはバンパービーム本体２が補強材３の移動をおさ
えることができ、バンパービーム本体２および補強材３
が互いに補強し合うことでバンパービーム１全体の強度
を向上させることができる。以上の構造的な特性による
強度の向上により、従来のように強度向上のために樹脂
の肉厚を厚くする必要がなく、バンパービーム１全体の
重量を軽量化しながら５マイル／時ポールテストもクリ
アできる強度を得ることができる。Further, since the peripheral surface of the reinforcing member 3 is covered (wrapped) with the bumper beam main body 2 to be integrated, for example, when a load is applied to the reinforcing member 3 and the reinforcing member 3 is pushed. The bumper beam main body 2 can suppress the movement of the reinforcing member 3, and the bumper beam main body 2 and the reinforcing member 3
By reinforcing each other, the strength of the entire bumper beam 1 can be improved. Due to the improvement in strength due to the above structural characteristics, it is not necessary to increase the resin thickness for strength improvement as in the past, and the 5 mph / hour pole test is cleared while reducing the overall weight of the bumper beam 1. The strength that can be obtained can be obtained.
【００３７】また、前記実施例に例示したような樹脂を
用いれば、樹脂自体の特性として軽量でかつ機械的強度
が強く、耐久性や耐衝撃性に優れ、かつ寸法精度にも優
れたバンパービーム本体２および補強材３とすることが
でき、構造的な特性と相まってバンパービーム１の軽量
化および高強度をより一層達成することができる。その
上、ブロー成形時の耐ドローダウン性や深絞り性等の成
形加工性やコストパフォーマンス等も優れたものにでき
る。When the resin as exemplified in the above-mentioned embodiment is used, the characteristics of the resin itself are light weight, strong mechanical strength, excellent durability and impact resistance, and excellent dimensional accuracy. The main body 2 and the reinforcing member 3 can be used, and the weight reduction and high strength of the bumper beam 1 can be further achieved in combination with the structural characteristics. In addition, molding processability such as drawdown resistance and deep drawability during blow molding and cost performance can be improved.
【００３８】また、従来バンパービームとして利用され
ることのあったＰＰ含浸ＧＦマット（ポリプロピレン含
浸ガラス繊維補強マット）は、通常、長繊維のグラスフ
ァイバーを樹脂内に整然と配置させて強度を向上させて
いるため、リサイクルした場合に性能が低下してしま
い、実用が難しかった。つまり、樹脂をリサイクルする
場合には、通常成形時に発生するバリ等を回収してクラ
ッシャーでペレットとし、このペレットを成形機内で溶
融、混練して射出成形やブロー成形によって成形してい
たが、この成形機での混練によって長繊維は乱雑に配置
されてしまうため、強度等の性能は繊維を整然と配置し
ていたときに比べて低減してしまうという問題があっ
た。これに対し、前述の樹脂では、通常、補強用として
短繊維のガラス繊維を用いており、リサイクルしても性
能が低下することがなく、リサイクル性も優れたものに
できる。The PP-impregnated GF mat (polypropylene-impregnated glass fiber reinforced mat), which has been conventionally used as a bumper beam, usually has long glass fibers arranged in an orderly manner to improve the strength. Therefore, when recycled, the performance deteriorates, making it difficult to put into practical use. In other words, when recycling resin, burrs and the like generated during normal molding are collected and pelletized by a crusher, and the pellets are melted and kneaded in a molding machine and molded by injection molding or blow molding. Since the long fibers are randomly arranged by the kneading in the molding machine, there is a problem that the performance such as strength is reduced as compared with the case where the fibers are arranged in an orderly manner. On the other hand, in the above-mentioned resin, glass fibers of short fibers are usually used for reinforcement, the performance does not deteriorate even when recycled, and the recyclability can be excellent.
【００３９】実験例 次に、本発明の効果を確認するために行った実験例につ
いて説明する。この実験例は、前記実施例のバンパービ
ーム１と、前記実施例とは構造の異なるバンパービーム
６０，７０，８０，９０との重量やポールテストの結果
を調べたものである。なお、構造的な相違を確認するた
め、材質は各実施例および比較例で共通させている。ま
た、図６に示すバンパービーム６０（比較例１）は、前
述の通り、補強材を含まない従来例のバンパービームで
ある。図７に示すバンパービーム７０（比較例２）は、
補強材７２の長手方向の寸法をバンパービーム本体７１
よりも短くしてステイ４まで届かない構造としたもので
ある。図８に示すバンパービーム８０（比較例３）は、
補強材８２の前後方向の長さをバンパービーム本体８１
よりも短くしたものである。図９に示すバンパービーム
９０（比較例４）は、補強材９２の後端側をバンパービ
ーム本体９１から露出させ、さらに衝撃吸収材９３を加
えたものである。Experimental Example Next, an experimental example conducted for confirming the effects of the present invention will be described. In this experimental example, the weight of the bumper beam 1 of the above-described embodiment and the bumper beams 60, 70, 80, 90 having different structures from those of the above-described embodiments and the result of the pole test are examined. In addition, in order to confirm the structural difference, the materials are made common to each example and comparative example. Further, as described above, the bumper beam 60 (Comparative Example 1) shown in FIG. 6 is a conventional bumper beam that does not include a reinforcing material. The bumper beam 70 (Comparative Example 2) shown in FIG. 7 is
The longitudinal dimension of the reinforcing member 72 is set to the bumper beam main body 71.
The structure is shorter than that and does not reach the stay 4. The bumper beam 80 (Comparative Example 3) shown in FIG.
The length of the reinforcing member 82 in the front-rear direction is set to the bumper beam main body 81.
It is a shorter version. A bumper beam 90 (Comparative Example 4) shown in FIG. 9 is obtained by exposing the rear end side of the reinforcing member 92 from the bumper beam main body 91 and further adding a shock absorbing material 93.
【００４０】この実験結果を表１に示す。この際、バン
パービーム本体２，６４，７１，８１，９１としては、
ＭＩが０．５ｇ／１０分のポリプロピレン７０重量％
と、ＭＩが０．０４ｇ／１０分のＨＤＰＥ（高密度ポリ
エチレン）２０重量％と、タルク１０重量％とからなる
樹脂を使用した。また、補強材としては、前述の（Ａ）
成分または（Ａ’）成分として、プロピレン単独重合体
またはプロピレン−エチレン共重合体が４０重量％、ガ
ラス繊維が６０重量％の配合比のものを用いた。この時
のガラス繊維の直径は１３μｍ、ペレット長は１０ｍｍ
であった。The results of this experiment are shown in Table 1. At this time, as the bumper beam bodies 2, 64, 71, 81, 91,
MI 0.5g / 10min polypropylene 70% by weight
A resin composed of 20% by weight of HDPE (high-density polyethylene) having an MI of 0.04 g / 10 min and 10% by weight of talc was used. As the reinforcing material, the above-mentioned (A)
As the component or the component (A ′), a compounding ratio of propylene homopolymer or propylene-ethylene copolymer of 40% by weight and glass fiber of 60% by weight was used. The diameter of the glass fiber at this time is 13 μm, and the pellet length is 10 mm.
Met.
【００４１】[0041]
【表１】 [Table 1]
【００４２】実験例と比較例１（補強材無し）との比較
により、５マイル／時ポールテストでは、実験例は比較
例１の約半分の変形量しかなく、バンパービーム１の破
損もないことから、重量（使用樹脂量）にほとんど差が
無くても、本発明によれば補強材３のインサート構造を
工夫することで、比較例１に比べて機械的強度が約２倍
に向上していることが判る。また、比較例１であっても
２．５マイル／時および５マイル／時の各ペンデュラム
試験に合格していることから、５マイル／時ポールテス
トのほうが各ペンデュラム試験よりも高い強度が要求さ
れ、本発明の実験例のように５マイル／時ポールテスト
に合格すれば、各ペンデュラム試験にも合格することが
判る。From the comparison between the experimental example and the comparative example 1 (without reinforcing material), in the 5 mile / hour pole test, the experimental example has only about half the deformation amount of the comparative example 1 and no damage to the bumper beam 1. Therefore, even if there is almost no difference in weight (resin amount used), according to the present invention, by devising the insert structure of the reinforcing material 3, the mechanical strength is improved about twice as compared with Comparative Example 1. It is understood that there is. Further, even in Comparative Example 1, since the pendulum tests of 2.5 mile / hour and 5 mile / hour are passed, the 5 mile / hour pole test requires higher strength than the pendulum tests. It can be seen that, if the 5 mile / hour pole test is passed as in the experimental example of the present invention, each pendulum test is also passed.
【００４３】一方、実験例と比較例２との比較から、補
強材をインサートしても、その補強材がステイ４まで延
長されていなければ、強度が低下することが判る。ま
た、実験例と比較例３との比較から、補強材の前後方向
の長さがバンパービーム本体よりも短い場合には、樹脂
の肉厚を厚くしなければつまり重量を増加させなければ
実施例と同様の強度は得られないことが判る。On the other hand, from the comparison between the experimental example and the comparative example 2, it can be seen that even if the reinforcing material is inserted, the strength is reduced unless the reinforcing material is extended to the stay 4. Further, from the comparison between the experimental example and the comparative example 3, when the length of the reinforcing member in the front-rear direction is shorter than that of the bumper beam main body, unless the thickness of the resin is increased, that is, the weight is not increased, It can be seen that the same strength as can not be obtained.
【００４４】さらに、実験例と比較例４との比較から、
補強材の周面をバンパービーム本体で被覆して露出させ
ないようにしなければ、衝撃吸収材９３を設けていても
強度が低下することが判る。以上の実験結果から、本発
明によれば、バンパービーム１の軽量化と機械的強度の
向上化とを図れ、耐久性や耐衝撃性等の各種特性に優れ
たバンパービーム１とすることができることが実証され
た。Further, from the comparison between the experimental example and the comparative example 4,
It can be seen that the strength is reduced even if the shock absorbing material 93 is provided unless the peripheral surface of the reinforcing material is covered with the bumper beam body so as not to be exposed. From the above experimental results, according to the present invention, it is possible to reduce the weight of the bumper beam 1 and improve the mechanical strength thereof, and to obtain the bumper beam 1 excellent in various characteristics such as durability and impact resistance. Was demonstrated.
【００４５】なお、本発明は前述の実施例に限定される
ものではなく、本発明の目的を達成できる範囲での変
形、改良等は前記実施例に含まれるものである。例え
ば、本発明のバンパービーム本体２および補強材３の材
質は前述したものに限定されず、実施にあたって適宜設
定すればよい。また、バンパービーム本体２および補強
材３の材質は同一のものでもよいし、各部材毎に異なる
材質の樹脂を用いてもよい。なお、樹脂をガラス繊維で
補強する場合、前述のように、短繊維のものを用いれ
ば、樹脂内にランダムに配合されるため、リサイクルし
ても性能が低下しない利点がある。It should be noted that the present invention is not limited to the above-mentioned embodiments, and modifications, improvements, etc. within the range in which the object of the present invention can be achieved are included in the above-mentioned embodiments. For example, the materials of the bumper beam main body 2 and the reinforcing material 3 of the present invention are not limited to those described above, and may be set appropriately in practice. Further, the bumper beam main body 2 and the reinforcing material 3 may be made of the same material, or resins of different materials may be used for each member. In the case of reinforcing the resin with glass fiber, as described above, if a short fiber is used, it is randomly blended in the resin, so that there is an advantage that the performance is not deteriorated even when recycled.
【００４６】また、補強材３を金型１０に取り付ける際
に、複数のブラケットを配置して金型１０を支持する場
合、そのブラケット部分には樹脂が回り込まないため、
補強材３の一部にバンパービーム本体２が被覆しない部
分が発生することになるが、このようなバンパービーム
本体２が被覆せずに補強材３が露出する部分が数カ所形
成されても、補強材３はそれ以外の部分ではバンパービ
ーム本体２で被覆されているため強度的に問題とはなら
ない。従って、本発明において補強材３の周囲をバンパ
ービーム本体が被覆するとは、全周面を完全に被覆する
場合だけではなく、ブラケット等によって多少の未被覆
部（補強材３が露出する部分）を有する場合も含むもの
である。Further, when a plurality of brackets are arranged to support the mold 10 when the reinforcing member 3 is attached to the mold 10, the resin does not wrap around the bracket portions.
A portion of the reinforcing material 3 which is not covered by the bumper beam body 2 will be generated, but even if there are several portions where the reinforcing material 3 is exposed without being covered by the bumper beam body 2, reinforcement is performed. Since the material 3 is covered with the bumper beam main body 2 at other portions, there is no problem in strength. Therefore, in the present invention, not only the case where the bumper beam main body covers the periphery of the reinforcing member 3 in the present invention is not limited to the case where the entire peripheral surface is completely covered, but some uncovered portion (the portion where the reinforcing member 3 is exposed) is formed by a bracket or the like. It also includes the case of having.
【００４７】さらに、バンパービーム本体２や補強材３
の形状も前記実施例に限定されず、バンパーの形状等に
応じて適宜設定すればよい。但し、軽量化と強度とのバ
ランスをとるため、補強材３やバンパービーム本体２の
上枠部２Ｂ、下枠部２Ｃは中空枠状に形成されているこ
とが好ましい。また、本発明は、特に自動車のリア用バ
ンパーのバンパービームに好適であるが、フロント用の
バンパービームとして用いてもよい。また、本発明のバ
ンパービームが装着される自動車としては、小型車や普
通車等の一般の自動車に限らず、トラックやバスなどに
も適用でき、バンパーを設ける各種の自動車に利用する
ことができる。Further, the bumper beam body 2 and the reinforcing material 3
The shape of is not limited to the above embodiment, and may be appropriately set according to the shape of the bumper and the like. However, in order to balance the weight reduction and the strength, it is preferable that the reinforcing material 3 and the upper frame portion 2B and the lower frame portion 2C of the bumper beam body 2 are formed in a hollow frame shape. Further, the present invention is particularly suitable for a bumper beam for a rear bumper of an automobile, but may be used as a front bumper beam. Further, the automobile equipped with the bumper beam of the present invention is not limited to general automobiles such as small cars and ordinary cars, but can be applied to trucks and buses, and can be used for various automobiles provided with bumpers.
【００４８】[0048]
【発明の効果】本発明のブロー成形バンパービームによ
れば、バンパービーム本体内に補強材をインサートする
とともに、その補強材の寸法やインサート構造を適切に
設定したので（補強材の長手方向の寸法をバンパービー
ム本体の取付部材間の間隔以上にして取付部材間に跨っ
て配置可能とし、長手方向に直交する前後方向の長さ寸
法をバンパービーム本体の前後方向の長さ寸法とほぼ同
じとし、さらに補強材の周面をバンパービーム本体で被
覆したので）、バンパービームの機械的強度を肉厚を厚
くすることなく向上できる。これにより、本発明のバン
パービームは、軽量化および強度向上をバランスよく達
成することができ、５マイル／時ポールテストにも合格
することができるという効果がある。According to the blow-molded bumper beam of the present invention, the reinforcing material is inserted into the body of the bumper beam, and the size of the reinforcing material and the insert structure are appropriately set (the size of the reinforcing material in the longitudinal direction). Can be placed over the mounting members with a spacing equal to or greater than the spacing between the mounting members of the bumper beam body, and the length dimension in the front-rear direction orthogonal to the longitudinal direction is substantially the same as the length dimension in the front-rear direction of the bumper beam body. Furthermore, since the peripheral surface of the reinforcing material is covered with the bumper beam main body), the mechanical strength of the bumper beam can be improved without increasing the wall thickness. As a result, the bumper beam of the present invention can achieve weight reduction and strength improvement in a well-balanced manner, and can also pass the 5 mile / hour pole test.
【００４９】本発明において、長手方向直交断面が略方
形枠状に形成された補強材を、バンパービーム本体の上
下方向の中間部に配置し、バンパービーム本体の補強材
の上下位置に長手方向直交断面が略方形枠状とされた上
枠部および下枠部を備えて構成すれば、各部材が中空枠
状に形成されてより一層の軽量化がはかれるという効果
がある。In the present invention, a reinforcing member having a substantially rectangular frame-shaped cross section in the longitudinal direction is arranged at an intermediate portion in the vertical direction of the bumper beam main body, and is orthogonal to the vertical position of the reinforcing member of the bumper beam main body in the longitudinal direction. When the upper frame portion and the lower frame portion, each of which has a substantially rectangular frame shape in cross section, are provided, the respective members are formed in a hollow frame shape, and there is an effect that the weight is further reduced.
【図１】本発明の一実施例のバンパービームの略半分を
示す斜視図である。FIG. 1 is a perspective view showing a substantially half of a bumper beam according to an embodiment of the present invention.
【図２】図１の実施例のバンパービームの上面図であ
る。FIG. 2 is a top view of the bumper beam of the embodiment of FIG.
【図３】図３のIII-III 線に沿った断面図である。FIG. 3 is a sectional view taken along line III-III in FIG.
【図４】図１の実施例に用いられる補強材の一実施例の
略半分を示す斜視図である。FIG. 4 is a perspective view showing substantially half of an example of a reinforcing member used in the example of FIG.
【図５】図１の実施例のバンパービーム製造過程を示す
説明図である。5 is an explanatory view showing a bumper beam manufacturing process of the embodiment of FIG. 1. FIG.
【図６】本発明の従来例（比較例１）のバンパービーム
の略半分を示す斜視図である。FIG. 6 is a perspective view showing approximately half of a bumper beam of a conventional example (Comparative Example 1) of the present invention.
【図７】本発明の比較例２のバンパービームの略半分を
示す斜視図である。FIG. 7 is a perspective view showing a substantially half of the bumper beam of Comparative Example 2 of the present invention.
【図８】本発明の比較例３のバンパービームの略半分を
示す斜視図である。FIG. 8 is a perspective view showing a substantially half of the bumper beam of Comparative Example 3 of the present invention.
【図９】本発明の比較例４のバンパービームの略半分を
示す斜視図である。FIG. 9 is a perspective view showing a substantially half of the bumper beam of Comparative Example 4 of the present invention.
１，６０，７０，８０，９０ バンパービーム ２，６４，７１，８１，９１ バンパービーム本体 ３，７２，８２，９２ 補強材 ４ 取付部材としてのステイ ５ ボルト １０ 金型 1,60,70,80,90 Bumper beam 2,64,71,81,91 Bumper beam main body 3,72,82,92 Reinforcement member 4 Stay 5 bolt 10 Mold as mounting member
Claims (2)
形する際に、前記バンパービーム本体内に樹脂製の補強
材をインサートして二重構造とされたブロー成形バンパ
ービームであって、 前記補強材は、その長手方向の寸法が少なくともバンパ
ービーム本体に設けられた車体側への取付部材間の間隔
以上の長さ寸法を有し、長手方向に直交する前後方向の
長さ寸法がバンパービーム本体の前後方向の長さ寸法と
ほぼ同じとされ、かつ前記補強材の周面が前記バンパー
ビーム本体で被覆されていることを特徴とするブロー成
形バンパービーム。1. A blow-molded bumper beam having a double structure in which a resin-made reinforcing material is inserted into the bumper beam main body when the resin-made bumper beam main body is blow-molded. Has a length dimension at least equal to or greater than the interval between the mounting members on the vehicle body side provided on the bumper beam body, and a length dimension in the front-back direction orthogonal to the length direction of the bumper beam body is A blow-molded bumper beam, which has substantially the same length dimension in the front-rear direction and in which the peripheral surface of the reinforcing member is covered with the bumper beam main body.
ムにおいて、前記補強材は、その長手方向直交断面が略
方形枠状に形成されて前記バンパービーム本体の上下方
向の中間部に配置され、前記バンパービーム本体は前記
補強材の上下位置にその長手方向直交断面が略方形枠状
とされた上枠部および下枠部を備えて構成されているこ
とを特徴とするブロー成形バンパービーム。2. The blow-molded bumper beam according to claim 1, wherein the reinforcing member has a substantially rectangular frame-shaped cross-section in the longitudinal direction and is arranged at an intermediate portion in the vertical direction of the bumper beam main body. The blow-molded bumper beam is characterized in that the bumper beam main body is provided with an upper frame portion and a lower frame portion, each having a substantially rectangular frame-shaped cross section in a longitudinal direction at the upper and lower positions of the reinforcing member.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03006094A JP3318428B2 (en) | 1994-02-28 | 1994-02-28 | Blow molding bumper beam |
| CA 2134943 CA2134943A1 (en) | 1993-11-05 | 1994-11-02 | Blow molding bumper beam |
| DE1994622778 DE69422778T2 (en) | 1993-11-05 | 1994-11-03 | Blow molding bumpers |
| EP19940308127 EP0652138B1 (en) | 1993-11-05 | 1994-11-03 | Blow molding bumper beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03006094A JP3318428B2 (en) | 1994-02-28 | 1994-02-28 | Blow molding bumper beam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07237512A true JPH07237512A (en) | 1995-09-12 |
| JP3318428B2 JP3318428B2 (en) | 2002-08-26 |
Family
ID=12293285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03006094A Expired - Fee Related JP3318428B2 (en) | 1993-11-05 | 1994-02-28 | Blow molding bumper beam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3318428B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1052150A1 (en) * | 1999-05-14 | 2000-11-15 | Fuji Jukogyo Kabushiki Kaisha | A bumper beam for a vehicle |
| WO2005105417A1 (en) * | 2004-04-29 | 2005-11-10 | Technische Universität Dresden | Hollow structure made of fiber-reinforced plastic with load introducing elements |
| JP2012508141A (en) * | 2008-11-07 | 2012-04-05 | ゼフィロス インコーポレイテッド | Hybrid reinforcement structure |
| US8376426B2 (en) | 2011-05-31 | 2013-02-19 | Hyundai Motor Company | Plastic composite bumper beam for vehicle |
| WO2013095046A1 (en) * | 2011-12-21 | 2013-06-27 | (주)엘지하우시스 | Bumper back beam with built-in fiber reinforced composite having hollow section, and bumper comprising same |
| JP2015013571A (en) * | 2013-07-04 | 2015-01-22 | 阪急阪神レールウェイ・テクノロジー株式会社 | Buffer material for preventing fall into platform gap |
| KR101496466B1 (en) * | 2008-09-10 | 2015-02-26 | 현대자동차주식회사 | Backbeam for Automobile Bumper |
| JP2015051582A (en) * | 2013-09-06 | 2015-03-19 | キョーラク株式会社 | Made-of-resin panel and molding method of the same |
| CN106394451A (en) * | 2015-07-28 | 2017-02-15 | 现代自动车株式会社 | Bumper unit of vehicle and method for manufacturing the same |
| US10611113B2 (en) | 2013-09-06 | 2020-04-07 | Kyoraku Co., Ltd. | Resin panel and forming method |
-
1994
- 1994-02-28 JP JP03006094A patent/JP3318428B2/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1052150A1 (en) * | 1999-05-14 | 2000-11-15 | Fuji Jukogyo Kabushiki Kaisha | A bumper beam for a vehicle |
| WO2005105417A1 (en) * | 2004-04-29 | 2005-11-10 | Technische Universität Dresden | Hollow structure made of fiber-reinforced plastic with load introducing elements |
| KR101496466B1 (en) * | 2008-09-10 | 2015-02-26 | 현대자동차주식회사 | Backbeam for Automobile Bumper |
| US9782950B2 (en) | 2008-11-07 | 2017-10-10 | Zephyros, Inc. | Hybrid reinforcement structure |
| JP2012508141A (en) * | 2008-11-07 | 2012-04-05 | ゼフィロス インコーポレイテッド | Hybrid reinforcement structure |
| US10434747B2 (en) | 2008-11-07 | 2019-10-08 | Zephyros, Inc. | Hybrid reinforcement structure |
| US11331877B2 (en) | 2008-11-07 | 2022-05-17 | Zephyros, Inc. | Hybrid reinforcement structure |
| US8376426B2 (en) | 2011-05-31 | 2013-02-19 | Hyundai Motor Company | Plastic composite bumper beam for vehicle |
| WO2013095046A1 (en) * | 2011-12-21 | 2013-06-27 | (주)엘지하우시스 | Bumper back beam with built-in fiber reinforced composite having hollow section, and bumper comprising same |
| KR101372004B1 (en) * | 2011-12-21 | 2014-03-12 | (주)엘지하우시스 | Bumper back beam made of stiffening closed section fiber composite material and Bumper having the bumper back beam |
| JP2015504812A (en) * | 2011-12-21 | 2015-02-16 | エルジー・ハウシス・リミテッドＬｇ Ｈａｕｓｙｓ，Ｌｔｄ． | Bumper back beam incorporating fiber composite reinforcing material having hollow cross section and bumper having the same |
| US9233656B2 (en) | 2011-12-21 | 2016-01-12 | Lg Hausys, Ltd. | Bumper back beam with a fiber composite reinforcing material |
| JP2015013571A (en) * | 2013-07-04 | 2015-01-22 | 阪急阪神レールウェイ・テクノロジー株式会社 | Buffer material for preventing fall into platform gap |
| JP2015051582A (en) * | 2013-09-06 | 2015-03-19 | キョーラク株式会社 | Made-of-resin panel and molding method of the same |
| US10611113B2 (en) | 2013-09-06 | 2020-04-07 | Kyoraku Co., Ltd. | Resin panel and forming method |
| CN106394451A (en) * | 2015-07-28 | 2017-02-15 | 现代自动车株式会社 | Bumper unit of vehicle and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3318428B2 (en) | 2002-08-26 |
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