JP2019064013A - 樹脂成形部品、樹脂成形部品の製造方法、及び溶着樹脂成形品の製造方法 - Google Patents
樹脂成形部品、樹脂成形部品の製造方法、及び溶着樹脂成形品の製造方法 Download PDFInfo
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- JP2019064013A JP2019064013A JP2017188826A JP2017188826A JP2019064013A JP 2019064013 A JP2019064013 A JP 2019064013A JP 2017188826 A JP2017188826 A JP 2017188826A JP 2017188826 A JP2017188826 A JP 2017188826A JP 2019064013 A JP2019064013 A JP 2019064013A
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- Prior art keywords
- rib
- resin molded
- resin
- welding
- retainer
- Prior art date
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Images
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
- B29C66/712—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined the composition of one of the parts to be joined being different from the composition of the other part
-
- 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
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- 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
- B29L2031/3005—Body finishings
- B29L2031/3008—Instrument panels
-
- 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
- B29L2031/3005—Body finishings
- B29L2031/3038—Air bag covers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
- Air Bags (AREA)
Abstract
Description
まず、図5に示す如く、本体部10とリブ11とを有する樹脂成形部品1の形状に合致する可動式の金型30を用意する。金型30は、第1金型31と、第2金型32と、を有している。第1金型31は、リブ11の形状に合致する部位を有しており、樹脂成形部品1の主にリブ11側の面を成形するための上型である。第2金型32は、樹脂成形部品1の主にリブ11とは反対側の面を成形するための下型である。
まず、上記の如く製造した樹脂成形部品1を用意すると共に、その樹脂成形部品1を溶着する樹脂部品2を用意する。次に、図8に示す如く、樹脂成形部品1及び樹脂部品2を、リブ11,21同士の間に隙間が形成されるように配置すると共に、その隙間に赤外線溶着機40を挿入配置する。赤外線溶着機40は、溶着対象の樹脂に赤外線を照射することによりその樹脂を溶融する装置である。
第1適用例は、樹脂成形部品1、樹脂部品2、及び溶着樹脂成形品3をエアバッグ取付用内装品に適用したものである。溶着樹脂成形品3は、車両用ニーエアバッグ装置59に適用される内装製品である。車両用ニーエアバッグ装置59は、樹脂成形部品1及び樹脂部品2として、インストルメントロアパネル基材51及びリテーナ52を有している。尚、樹脂成形部品1は、インストルメントロアパネル基材51及びリテーナ52のうち何れであってもよく、樹脂部品2は、樹脂成形部品1ではない他方側となる。車両用ニーエアバッグ装置59は、図14に示す如く、リテーナ52が車室の前部に設けられたインストルメントロアパネル基材51と一体になるように、設けられている。
インストルメントロアパネル:
図10及び図13に示す如く、インストルメントロアパネルは、インストルメントロアパネル基材51と、該インストルメントロアパネル基材51の後方側に接合されたクッション層57及び表皮58と、を備えている。インストルメントロアパネル基材51は、二つのドア62、63から成る開成部61及び、該開成部61を囲む外周部64を有する。二つのドア62,63は、リテーナ52の後方に向かう蓋71のフラップ72、73の境界と対応する位置に形成される「日」字形のティアライン65、66、67、68、69により画定されている。
図11に示す如く、リテーナ52は、開成部61の裏面と平行して設けられる蓋71と、前方へ突出する枠部74と、枠部74の外周側に延び、前記インストルメントロアパネルと平行して設けられるフランジ部77により構成される。
前記インストルメントロアパネルの前方側と、前記固定板部78の後方側との間(少なくとも、前記開成部61の前方側と前記蓋71の後方側との間)には、車幅方向に延設され、前記開成部61の前方側から前方に突出し、端部をその突出方向に直交する方向に広がる垂直面とされた第1の溶着リブ群60と、前記蓋71の後方側から後方に突出し、端部をその突出方向に直交する方向に広がる垂直面とされて、前記第1の溶着リブ群60に対応して溶着可能な第2の溶着リブ群70と、が設けられている。
ケース53は、前記リテーナ52の蓋71の前方側に設けられており、図示していない固定部品を介して車体に固定されている。このケース53は、図12に示す如く、箱状に形成された本体部81を有している。この本体部81は、ドア62,63側に開口81Hを有すると共に、この開口81Hと反対側に底部81Bを有している。
インフレータ54は、固定部材55によりケース53の中に、固定されている。また、このインフレータ54は、図示しない制御装置から出力された信号が入力された場合には、エアバッグ56が膨張展開されるように、このエアバッグ56の内部にガスを供給する構成とされている。
エアバッグ56は、ケース53の内側に折畳みの状態で収容されており、その基端部56Eは、底部81Bに固定されている。
前記インストルメントロアパネル基材51の後方側の相応位置に、順にクッション層57、表皮58を取り付け、インストルメントロアパネルを形成する。
次に、上記第1適用例の動作及び効果について説明する。
第2適用例は、樹脂成形部品1、樹脂部品2、及び溶着樹脂成形品3をエアバッグ取付用内装品に適用したものである。溶着樹脂成形品3は、車両用エアバッグ装置に適用されるエアバッグ取付用内装品100である。エアバッグ取付用内装品100は、エアバッグ101を保持すると共に、エアバッグ101の展開時に開裂するパネル部材である。エアバッグ取付用内装品100は、図15に示す如く、ケース110と、樹脂成形部品1及び樹脂部品2としてのリテーナ120及びインストルメントパネル130と、を備えている。尚、樹脂成形部品1は、リテーナ120及びインストルメントパネル130のうち何れであってもよく、樹脂部品2は、樹脂成形部品1ではない他方側となる。
まず、エアバッグ101が収容されるケース110の収容空間112のエアバッグ101が展開する側を画成する基部121及び蓋部123を有するリテーナ120を用意すると共に、そのリテーナ120に溶着されるインストルメントパネル130のパネル基材131を用意する。そして、それらのリテーナ120及びパネル基材131のリブ120b,131cの先端部を赤外線溶着機で所定温度まで昇温させて溶融する。次に、治具を用いて、それぞれ先端部が溶融されたリテーナ120及びパネル基材131を互いに近づく水平方向(加圧方向)に相対移動させることで、リブ120b,131cの溶着端面120c,131d同士をその溶着端面120c,131dに垂直な方向に当接させて加圧する。この手法でリテーナ120及びインストルメントパネル130のリブ120b,131c同士が赤外線溶着されたエアバッグ取付用内装品100を製造する。
エアバッグ取付用内装品100において、エアバッグ101がインフレータ102からのガス供給により膨張展開すると、まず、リテーナ120の蓋部123が裏面側から表面側に向けて押圧されることで開くように回動する。そして、この蓋部123の回動が生じると、その回動によりインストルメントパネル130がパネル基材131のティアライン131aに沿って開裂されることで、その開裂した隙間からエアバッグ101が車室内側に膨出する。これにより、車室内側に膨出したエアバッグ101により車両乗員を保護することができる。
Claims (7)
- 本体部と、前記本体部から突出すると共に所定樹脂部品に赤外線溶着されるリブと、が一体成形された、少なくとも前記本体部に発泡層が形成される樹脂成形部品であって、
前記リブの先端部は、根元部に比して肉抜きされた肉抜き残部を有する、樹脂成形部品。 - 前記リブの前記肉抜き残部のリブ幅は、根元部のリブ幅に比して小さい、請求項1に記載された樹脂成形部品。
- 前記リブの先端部は、前記発泡層に比して発泡が抑制された低発泡部である、請求項1又は2に記載された樹脂成形部品。
- 前記低発泡部は、前記リブが赤外線溶着時に溶融される溶融領域全域に及ぶ、請求項3に記載された樹脂成形部品。
- 請求項3又は4記載の樹脂成形部品を成形するための金型内の空隙に発泡性を有する樹脂材料を充填する充填工程と、
前記金型を前記樹脂材料の充填後にコアバックすることにより、前記樹脂成形部品の内部に前記発泡層を形成しつつ前記リブの先端部に前記低発泡部を形成する発泡層形成工程と、
を備える、樹脂成形部品の製造方法。 - 請求項1乃至4の何れか一項記載の樹脂成形部品の前記リブの先端及び前記所定樹脂部品に赤外線を照射することにより前記リブ及び前記所定樹脂部品を溶融する溶融工程と、
溶融された前記リブを溶融された前記所定樹脂部品に圧接することにより前記リブと前記所定樹脂部品とを接合する接合工程と、
を備える、溶着樹脂成形品の製造方法。 - 前記リブの先端部は、前記発泡層に比して発泡が抑制された低発泡部であり、
前記溶融工程における前記リブの溶融は、溶融領域が前記低発泡部の範囲内に収まるように行われる、請求項6に記載された溶着樹脂成形品の製造方法。
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US11364850B2 (en) | 2020-03-25 | 2022-06-21 | Toyoda Gosei Co., Ltd. | Resin molded product |
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JPH05177711A (ja) * | 1991-12-27 | 1993-07-20 | Tsuchiya Mfg Co Ltd | 合成樹脂部材の溶着方法 |
JP2004345094A (ja) * | 2003-05-20 | 2004-12-09 | Koito Mfg Co Ltd | 車両用灯具の製造装置 |
JP2007021965A (ja) * | 2005-07-20 | 2007-02-01 | Nissha Printing Co Ltd | 貫通部に突起を嵌挿し融着した一対の成形品 |
JP2009154308A (ja) * | 2007-12-25 | 2009-07-16 | Mazda Motor Corp | 発泡樹脂成形品の成形方法及び成形装置 |
JP2012035532A (ja) * | 2010-08-09 | 2012-02-23 | Japan Steel Works Ltd:The | 中空成形品の製造方法および製造装置 |
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JP3814032B2 (ja) * | 1996-11-01 | 2006-08-23 | 本田技研工業株式会社 | 成形品 |
JP4506203B2 (ja) * | 2004-02-27 | 2010-07-21 | 株式会社デンソー | 樹脂部材の継手構造、レーザ溶着方法及び電気機器の樹脂筐体 |
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JPH05177711A (ja) * | 1991-12-27 | 1993-07-20 | Tsuchiya Mfg Co Ltd | 合成樹脂部材の溶着方法 |
JP2004345094A (ja) * | 2003-05-20 | 2004-12-09 | Koito Mfg Co Ltd | 車両用灯具の製造装置 |
JP2007021965A (ja) * | 2005-07-20 | 2007-02-01 | Nissha Printing Co Ltd | 貫通部に突起を嵌挿し融着した一対の成形品 |
JP2009154308A (ja) * | 2007-12-25 | 2009-07-16 | Mazda Motor Corp | 発泡樹脂成形品の成形方法及び成形装置 |
JP2012035532A (ja) * | 2010-08-09 | 2012-02-23 | Japan Steel Works Ltd:The | 中空成形品の製造方法および製造装置 |
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US11364850B2 (en) | 2020-03-25 | 2022-06-21 | Toyoda Gosei Co., Ltd. | Resin molded product |
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