JP3292998B2 - Method for manufacturing hollow structure - Google Patents
Method for manufacturing hollow structureInfo
- Publication number
- JP3292998B2 JP3292998B2 JP22480792A JP22480792A JP3292998B2 JP 3292998 B2 JP3292998 B2 JP 3292998B2 JP 22480792 A JP22480792 A JP 22480792A JP 22480792 A JP22480792 A JP 22480792A JP 3292998 B2 JP3292998 B2 JP 3292998B2
- Authority
- JP
- Japan
- Prior art keywords
- fabric
- parison
- hollow structure
- strength
- split
- 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.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 238000000034 method Methods 0.000 title description 10
- 239000004744 fabric Substances 0.000 claims description 45
- -1 polyethylene Polymers 0.000 claims description 11
- 239000004698 Polyethylene Substances 0.000 claims description 7
- 229920000573 polyethylene Polymers 0.000 claims description 7
- 229920000098 polyolefin Polymers 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 description 8
- 238000001891 gel spinning Methods 0.000 description 6
- 229920001903 high density polyethylene Polymers 0.000 description 5
- 239000004700 high-density polyethylene Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
- 238000000071 blow moulding Methods 0.000 description 4
- NNBZCPXTIHJBJL-UHFFFAOYSA-N decalin Chemical compound C1CCCC2CCCCC21 NNBZCPXTIHJBJL-UHFFFAOYSA-N 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 3
- 229920001400 block copolymer Polymers 0.000 description 2
- 229920006178 high molecular weight high density polyethylene Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 229920005604 random copolymer Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- PXXNTAGJWPJAGM-UHFFFAOYSA-N vertaline Natural products C1C2C=3C=C(OC)C(OC)=CC=3OC(C=C3)=CC=C3CCC(=O)OC1CC1N2CCCC1 PXXNTAGJWPJAGM-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000005662 Paraffin oil Substances 0.000 description 1
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/24—Lining or labelling
-
- 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
- B29C49/24—Lining or labelling
- B29C2049/2412—Lining or labelling 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
- B29C49/24—Lining or labelling
- B29C2049/2431—Means for preparing or treating the label or lining, e.g. cutting, deforming, heating or applying adhesive
- B29C2049/2441—Deforming
- B29C2049/2442—Deforming while blow-moulding, e.g. the preform expansion deforms the label or lining
-
- 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
- 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
- B29K2713/00—Use of textile products or fabrics for preformed parts, e.g. for inserts
-
- 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)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車のバンパー部材
やルーフ部材あるいはフォークリフトの屋根材などの車
両用構造体や各種ケースなどの包装材さらに産業用機器
のハウジングやパネルなどの産業用構造材などの中空構
造体の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging material for a vehicle structure such as a bumper member or a roof member of an automobile or a roof material of a forklift, a packaging material for various cases, and an industrial structural material such as a housing or panel for industrial equipment. And the like.
【０００２】[0002]
【従来の技術】この種の中空構造体は、中空部を一体に
一度に形成できるために、ブロー成形にて形成されてい
る。中空構造体は、その中空部が一種の緩衝部材として
働くために、構造部材自体の軽量化と相俟って多用され
る傾向にある。しかし、中空体を有するために強度的に
は、この部分が弱いために、製造時に金属などの補強部
材をブロー成形時に埋込んで一体に形成するインサート
ブロー成形方法にて補強することが図られている（実開
昭５９−１１７５６１号公報）。2. Description of the Related Art A hollow structure of this type is formed by blow molding so that a hollow portion can be integrally formed at one time. Hollow structures tend to be frequently used in conjunction with weight reduction of the structural members themselves, since the hollow portions serve as a kind of cushioning member. However, in terms of strength due to having a hollow body, since this portion is weak, it is sought to reinforce it by an insert blow molding method in which a reinforcing member such as metal is embedded at the time of blow molding and integrally formed at the time of manufacture. (Japanese Utility Model Laid-Open No. 59-117561).
【０００３】[0003]
【発明が解決しようとする課題】このような、金属を備
える中空構造体は、重量が重くなるばかりでなく、ブロ
ー成形時に埋設されるために、廃棄時にプラスチックと
金属とを分離することができず、廃棄処理上の問題点を
有している。Such a hollow structure provided with a metal not only increases in weight but also is buried during blow molding, so that plastic and metal can be separated at the time of disposal. However, there is a problem in disposal processing.
【０００４】そこで、本発明は廃棄上の問題を有するこ
となく、また重量がおもくなるこがなくしかも強度の増
大ができる中空構造体をうることを目的とするものであ
る。Accordingly, an object of the present invention is to provide a hollow structure which does not have a disposal problem, does not have a large weight, and can increase strength.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、互いに対向する分割金型のキャビティの
表面にファブリックを配置し次いで上記分割金型間にパ
リスンを配置しパリスンと分割金型との間に上記ファブ
リックが介在するようにして分割金型を締めた後パリス
ンの内部に圧力流体を導入し成形品表面にファブリック
を貼着した中空構造体の製造方法において、上記パリス
ンは曲げ弾性率（ＡＳＴＭＤ７９０）が５０００Ｋｇ／
ｃｍ2以上のポリオレフィンより構成され、かつ上記フ
ァブリックをポリエチレンの高延伸処理により得られた
強度が１０ｇ／ｄ以上で弾性率が８００ｇ／ｄ以上の超
高強度の繊維状部材にて形成された織物あるいは編物と
したことを特徴とする中空構造体の製造方法としたもの
である。In order to achieve the above object, the present invention provides a method of disposing a fabric on a surface of a cavity of a split mold opposing each other, and then disposing a parison between the split molds. A method for manufacturing a hollow structure in which a pressure fluid is introduced into the inside of a parison and the fabric is adhered to the surface of a molded article after the split mold is tightened so that the fabric is interposed between the mold and the paris, The flexural modulus (ASTMD790) is 5000 kg /
woven fabric composed of a polyolefin having a size of at least 2 cm 2 and having a strength of at least 10 g / d and an elastic modulus of at least 800 g / d obtained by subjecting the fabric to high stretching treatment of polyethylene. Alternatively, it is a method for manufacturing a hollow structure characterized by being a knit.
【０００６】本発明において、パリスンに使用するポリ
オレフィンは、曲げ弾性率が５０００Ｋｇ／ｃｍ2以上
の比較的剛性のある高密度ポリエチレン、超高分子量高
密度ポリエチレ、ポリプロピレン、プロピレン−エチレ
ンランダム共重合体、プロピレン−エチレンブロック共
重合体などのポリオレフィンおよびこれらを主体とし若
干の他のプラスチックをブレンドしたブレンド体が使用
できる。また、本発明に使用するファブリックとは、重
量平均分子量２０万以上、好ましくは６０万以上の高重
合度のポリエチレンをゲル紡糸法あるいは溶融延伸配向
法により延伸して超高強度に仕上げた繊維状部材にて形
成した織物あるいは編物であり、繊維状部材とは一般に
繊維を呼ばれるもののほかスプリットファイバー、スプ
リットヤーン、スリットファイバー、スリットヤーンの
ようなものも含まれる。とくに上記延伸方法の中でも、
ゲル紡糸法が好適である。ゲル紡糸法とは、ゲル状態を
経て高強度繊維化される製糸法のことであり、テトラリ
ン、デカリン、ナフタレン、部分水添加ナフタレン、鉱
物油、パラフィン油、パラフィンワックスなどの溶剤に
て上記したポリエチレンを溶解し撹拌することにより均
一溶液を作成する溶融工程を経て、次いで微小な口径を
有するダイより適度な巻き取り速度にて紡出糸として巻
き取り、その紡出糸を空気や水等の冷却結晶化してゲル
状糸に紡糸する紡糸工程、さらにこのゲル状糸を１０〜
１００倍に超延伸して超高強度の繊維状部材とする延伸
工程の各工程より構成される製造方法にて製造される。In the present invention, the polyolefin used for Parison is a relatively rigid high-density polyethylene having a flexural modulus of 5000 kg / cm 2 or more, ultra-high-molecular-weight high-density polyethylene, polypropylene, propylene-ethylene random copolymer, A polyolefin such as a propylene-ethylene block copolymer and a blend mainly composed of these and some other plastics can be used. Further, the fabric used in the present invention is a fibrous material obtained by stretching polyethylene having a high polymerization degree having a weight average molecular weight of 200,000 or more, preferably 600,000 or more by a gel spinning method or a melt drawing orientation method and finishing it to an ultra-high strength. It is a woven or knitted fabric formed of a member. The fibrous member includes not only fibers generally called but also fibers such as split fibers, split yarns, slit fibers, and slit yarns. Especially among the above stretching methods,
Gel spinning is preferred. The gel spinning method is a spinning method in which a fiber is formed into a high-strength fiber through a gel state, and the above polyethylene is dissolved in a solvent such as tetralin, decalin, naphthalene, partially water-added naphthalene, mineral oil, paraffin oil, or paraffin wax. Through a melting step of creating a uniform solution by stirring and dispersing, and then winding it as a spun yarn from a die having a small diameter at an appropriate winding speed, and cooling the spun yarn with air, water, etc. A spinning step of crystallizing and spinning into a gel-like yarn,
It is manufactured by a manufacturing method composed of each step of a drawing process in which the fiber is super-stretched 100 times to obtain an ultra-high strength fibrous member.
【０００７】[0007]
【作用】本発明によれば、分割金型のキャビティの表面
にファブリックを配置し、次いで上記分割金型間にパリ
スンを配置して、分割金型を締めた後パリスンの内部に
圧力流体を導入し成形するので、成形品の表面にファブ
リックを貼着した中空構造体が製造される。そして、パ
リスンは曲げ弾性率が５０００Ｋｇ／ｃｍ2以上のポリ
オレフィンより構成され、ファブリックはポリエチレン
の高延伸処理により得られた強度が１０ｇ／ｄ以上で弾
性率が８００ｇ／ｄ以上の超高強度の繊維状部材にて形
成された織物あるいは編物であるから、プラスチックの
みで強度が大であり、しかも軽量な中空構造体が得られ
る。According to the present invention, the fabric is arranged on the surface of the cavity of the split mold, then the parison is arranged between the split molds, and after the split molds are tightened, the pressure fluid is introduced into the parison. Therefore, a hollow structure in which a fabric is adhered to the surface of a molded article is manufactured. Parison is composed of a polyolefin having a flexural modulus of 5000 kg / cm 2 or more, and the fabric is an ultrahigh-strength fiber having a strength of 10 g / d or more and a modulus of 800 g / d or more obtained by a high stretching treatment of polyethylene. Since it is a woven or knitted article formed of a shaped member, a hollow structure having high strength and light weight can be obtained using only plastic.
【０００８】[0008]
【実施例】本発明の実施例を図面に基き説明する。図１
は、本発明の製造方法により製造された中空構造体の実
施例であるバンパー部材であり、図２は、本発明の製造
方法を説明する図であり、図３は、本発明に使用するフ
ァブリックに使用する繊維状部材を製造するゲル紡糸法
の説明図である。図１に示すように、１は本発明の実施
例である表面にファブリック２を貼着した自動車用のパ
ンパー部材である。バンパー部材は内部に中空部３を有
し、表面には以下に示す製法にて製造された繊維状部材
にて編んだファブリック２を貼着したものである。バン
パー部材１は、内部に中空部３を有するので軽量性を備
えるとともに、表面にはファブリック２を貼着したので
曲げ等に対する高剛性が得られるものである。さらに階
段状に形成された凹部４にも、ファブリック２は入込み
均一に貼着されているので、バンパー部材１は凹形状に
よるリブ効果とあいまってより大きな剛性が得られる。An embodiment of the present invention will be described with reference to the drawings. FIG.
FIG. 2 is a bumper member which is an embodiment of a hollow structure manufactured by the manufacturing method of the present invention. FIG. 2 is a view for explaining the manufacturing method of the present invention. FIG. 3 is a fabric used in the present invention. FIG. 3 is an explanatory view of a gel spinning method for producing a fibrous member used for the present invention. As shown in FIG. 1, reference numeral 1 denotes an automobile bumper member having a fabric 2 adhered to a surface according to an embodiment of the present invention. The bumper member has a hollow portion 3 inside, and a fabric 2 knitted with a fibrous member manufactured by the following manufacturing method is adhered to the surface. Since the bumper member 1 has the hollow portion 3 therein, the bumper member 1 is lightweight, and the fabric 2 is adhered to the surface so that high rigidity against bending and the like can be obtained. Furthermore, since the fabric 2 is inserted into the concave portion 4 formed in a stepped shape and is stuck uniformly, the bumper member 1 can obtain greater rigidity in combination with the rib effect due to the concave shape.
【０００９】図２により本発明に係る製造方法の一工程
を説明する。先ず、互いに対向する面にキャビティ１２
ａ，１２ｂを有する分割金型１１ａ，１１ｂを対向して
分離配置させ、一方の分割金型１１ａのキャビティ１２
ａの表面にキャビティの透影面積を覆うように布状に形
成したファブリック１３を配置する。配置するファブリ
ック１３の数は図２に示すように一方の分割金型１１ａ
の表面に１枚のファブリックを配置することも、あるい
は両方の分割金型１１ａ，１１ｂのキャビティ１２ａ，
１２ｂの表面に２枚のファブリックを配置してもよい。
配置するファブリックはゲル紡糸法で得た超高強度に仕
上げた繊維状部材を使用した織物あるいは編物である。One step of the manufacturing method according to the present invention will be described with reference to FIG. First, the cavities 12 are provided on the surfaces facing each other.
a and 12b are separately arranged facing each other, and the cavity 12 of one of the divided molds 11a is
A fabric 13 formed in a cloth shape is arranged on the surface of a so as to cover the transparent area of the cavity. The number of fabrics 13 to be arranged is one of the split molds 11a as shown in FIG.
May be placed on the surface of the fabric, or the cavities 12a, 12b of both split molds 11a, 11b may be placed.
Two fabrics may be arranged on the surface of 12b.
The fabric to be arranged is a woven or knitted fabric using a fibrous member obtained by gel spinning and having a high strength.
【００１０】次いで図２に示すように、分割金型１１
ａ，１１ｂ間に加熱溶融された高密度ポリエチレンの管
状体であるパリスン１５をダイ１４より押出し垂下す
る。ダイ１４より押出されたパリスン１５は、ファブリ
ック１３の内方に位置するように垂下し、結果的にパリ
スン１５と分割金型１１ａのキャビティ面１２ａとの間
にファブリック１３が介在するようにする。次に、分割
金型１１ａ，１１ｂを締めて、パリスン１５を挟持し、
パリスン１５の上下の端を密封する。このときに、パリ
スン１５の内部に３〜１０Ｋｇ／ｃｍ2の圧力流体を導
入すると、パリスン１５は分割金型１１ａ，１１ｂのキ
ャビティ面に密着し、同時にファブリック１３はパリス
ン１５と分割金型のキャビティ１２ａとの間に上記圧力
流体の圧力にて挟まれ、その結果、未だ溶融状態にある
パリスンの表面に上記ファブリック１３は埋め込まれ
る。このとき、パリスンの溶融温度とファブリックの状
態を適宜選定することにより、ファブリックを美麗に埋
め込むことができる。なお、ファブリック１３は柔軟性
を備えているので凹部にもその形状に応じて柔軟に入込
みその形状をよく転写して形成する。Next, as shown in FIG.
A parison 15 which is a high-density polyethylene tubular body heated and melted between a and 11b is extruded from a die 14 and hangs down. The parison 15 extruded from the die 14 hangs down so as to be located inside the fabric 13, so that the fabric 13 is interposed between the parison 15 and the cavity surface 12a of the split mold 11a. Next, the split molds 11a and 11b are tightened to hold the parison 15,
The upper and lower ends of Parison 15 are sealed. At this time, when a pressure fluid of 3 to 10 kg / cm 2 is introduced into the inside of the parison 15, the parison 15 comes into close contact with the cavity surfaces of the split molds 11 a and 11 b, and at the same time, the fabric 13 and the cavity of the split mold and the split mold are separated. The fabric 13 is embedded in the surface of the parison that is still in a molten state. At this time, the fabric can be beautifully embedded by appropriately selecting the melting temperature of the parison and the state of the fabric. Since the fabric 13 has flexibility, the fabric 13 is flexibly inserted into the concave portion according to the shape, and the shape is well transferred and formed.
【００１１】ファブリックは、図３にその概念図を示す
ように、重量平均分子量が２００万の超高分子量ポリエ
チレンに溶剤として５重量％のデカリンを配合して１５
０℃の温度にて混合槽２１にて撹拌し、ギアポンプ２２
にて定量を送出すことにより０．７ｍｍの口径のダイ２
３より押出し、冷水槽２４に落下させてゲルフィラメン
ト２５を得て、１００〜１５０℃のオーブン（図示せ
ず）中を通過させながら延伸装置２６にて約７０倍に超
延伸することにより高強度・高剛性の繊維状部材２７を
製造したうえ、この繊維状部材を縦糸と横糸にして織り
あげた織物とする。As shown in the conceptual diagram of FIG. 3, the fabric is prepared by blending ultra-high molecular weight polyethylene having a weight average molecular weight of 2,000,000 with 5% by weight of decalin as a solvent.
The mixture is stirred in the mixing tank 21 at a temperature of 0 ° C.
Die 2 of 0.7mm diameter by sending out fixed amount at
3 and dropped into a cold water tank 24 to obtain a gel filament 25, and super-stretched about 70 times with a stretching device 26 while passing through an oven (not shown) at 100 to 150 ° C. to obtain high strength. -A woven fabric obtained by manufacturing the fibrous member 27 having high rigidity and woven the fibrous member into warp and weft.
【００１２】なお、上記実施例でパリスンに使用した高
密度ポリエチレンは、密度が０．９４５ｇ／ｃｍ3以上
で曲げ弾性率が１００００Ｋｇ／ｃｍ2以上のポリエチ
レンより構成され、またファブリックに編みあげた超高
強度の繊維状部材は、その弾性率が１１５０ｇ／ｄで強
度が３３ｇ／ｄであった。The high-density polyethylene used for the parison in the above embodiment is made of polyethylene having a density of 0.945 g / cm 3 or more and a flexural modulus of 10,000 kg / cm 2 or more. The high-strength fibrous member had an elastic modulus of 1150 g / d and a strength of 33 g / d.
【００１３】上記実施例のバンパー部材１は、従来の高
密度ポリエチレンのものに比較して強度が高く、従来の
バンパー部材のように金属により補強する必要がないく
らい充分の強度を備えていた。従って、従来のものに較
べて大きな軽量化がはかれるものである。また、バンパ
ー部材はファブリックも含めて全てポリエチレンより構
成されているので、ファブリックを剥して分別して廃棄
する必要がないので、現在問題となっている分別回収の
点においても、大きな特長を有している。The bumper member 1 of the above embodiment has a higher strength than that of the conventional high-density polyethylene, and has sufficient strength so that it does not need to be reinforced with metal unlike the conventional bumper member. Therefore, the weight is greatly reduced as compared with the conventional one. In addition, since the bumper members are all made of polyethylene, including the fabric, there is no need to peel the fabric and separate and discard it. I have.
【００１４】なお、パリスンに使用するプラスチック
は、曲げ弾性率が５０００Ｋｇ／ｃｍ2以上の比較的剛
性のある高密度ポリエチレン、超高分子量高密度ポリエ
チレ、ポリプロピレン、プロピレン−エチレンランダム
共重合体、プロピレン−エチレンブロック共重合体など
のポリオレフィンおよびこれらを主体とし若干の他のプ
ラスチックをブレンドしたものとすることにより、バリ
処理に際しては貼着するファブリックと相溶性があり、
ファブリックを除去して処理する必要がなく、きわめて
作業性がよい。The plastic used for the Parison is a relatively rigid high-density polyethylene having a flexural modulus of 5000 kg / cm 2 or more, ultra-high molecular weight high-density polyethylene, polypropylene, propylene-ethylene random copolymer, propylene-propylene. By blending polyolefin such as ethylene block copolymer and some other plastics mainly with these, it is compatible with the fabric to be adhered at the time of burr treatment,
There is no need to remove and treat the fabric, and the workability is extremely good.
【００１５】[0015]
【発明の効果】本発明は以上のように構成したので、フ
ァブリックを中空構造体の表面に埋め込むことにより中
空構造体の強度を向上させることができるとともに重量
の過度の増加がなく、従って軽量でかつ強度の大きい中
空構造体を得ることができる。また、廃棄処理時にあっ
ては、特にファブリックを除去する必要がなく一体で処
理できるという利点を有する。As described above, according to the present invention, the strength of the hollow structure can be improved by embedding the fabric on the surface of the hollow structure, and the weight is not excessively increased. In addition, a hollow structure having high strength can be obtained. Further, at the time of disposal, there is an advantage that the fabric can be integrally treated without having to remove the fabric.
【図１】本発明の製造方法により製造された中空構造体
の実施例であるバンパー部材を示す一部破断斜視図であ
る。FIG. 1 is a partially cutaway perspective view showing a bumper member which is an embodiment of a hollow structure manufactured by a manufacturing method of the present invention.
【図２】本発明の製造方法を説明する説明図である。FIG. 2 is an explanatory diagram illustrating a manufacturing method of the present invention.
【図３】本発明の製造方法でファブリックに使用する繊
維状部材を製造するゲル紡糸法の説明図である。FIG. 3 is an explanatory diagram of a gel spinning method for producing a fibrous member used for a fabric by the production method of the present invention.
１ バンパー部材 １１ａ，１１ａ 分割金型 １２ａ，１２ｂ キャビティ １３ ファブリック DESCRIPTION OF SYMBOLS 1 Bumper member 11a, 11a Split mold 12a, 12b Cavity 13 Fabric
Claims (1)
表面にファブリックを配置し次いで上記分割金型間にパ
リスンを配置しパリスンと分割金型との間に上記ファブ
リックが介在するようにして分割金型を締めた後パリス
ンの内部に圧力流体を導入し成形品表面にファブリック
を貼着した中空構造体の製造方法において、上記パリス
ンは曲げ弾性率が５０００Ｋｇ／ｃｍ2以上のポリオレ
フィンより構成され、かつ上記ファブリックをポリエチ
レンの高延伸処理により得られた強度が１０ｇ／ｄ以上
で弾性率が８００ｇ／ｄ以上の超高強度の繊維状部材に
て形成された織物あるいは編物としたことを特徴とする
中空構造体の製造方法。1. A split mold in which a fabric is arranged on the surfaces of the cavities of the split molds facing each other, and a parison is arranged between the split molds so that the fabric is interposed between the parison and the split mold. In a method for producing a hollow structure in which a pressurized fluid is introduced into a parison after the mold is closed and a fabric is adhered to the surface of a molded article, the parison is composed of a polyolefin having a flexural modulus of 5000 kg / cm 2 or more, and A hollow fabric characterized in that the fabric is a woven or knitted fabric formed of an ultra-high-strength fibrous member having a strength of 10 g / d or more and an elastic modulus of 800 g / d or more obtained by a high stretching treatment of polyethylene. The method of manufacturing the structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22480792A JP3292998B2 (en) | 1992-07-30 | 1992-07-30 | Method for manufacturing hollow structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22480792A JP3292998B2 (en) | 1992-07-30 | 1992-07-30 | Method for manufacturing hollow structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06143394A JPH06143394A (en) | 1994-05-24 |
| JP3292998B2 true JP3292998B2 (en) | 2002-06-17 |
Family
ID=16819517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22480792A Expired - Fee Related JP3292998B2 (en) | 1992-07-30 | 1992-07-30 | Method for manufacturing hollow structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3292998B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1741543B1 (en) * | 2004-04-30 | 2014-03-05 | Kyoraku Co., Ltd. | Interior finishing panel for vehicle and method of manufacturing the same |
| JP2008279778A (en) * | 2008-07-22 | 2008-11-20 | Kyoraku Co Ltd | Fabric-stuck molded article |
-
1992
- 1992-07-30 JP JP22480792A patent/JP3292998B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06143394A (en) | 1994-05-24 |
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