JPH02125716A - Manufacture of plastic hollow material - Google Patents
Manufacture of plastic hollow materialInfo
- Publication number
- JPH02125716A JPH02125716A JP63277268A JP27726888A JPH02125716A JP H02125716 A JPH02125716 A JP H02125716A JP 63277268 A JP63277268 A JP 63277268A JP 27726888 A JP27726888 A JP 27726888A JP H02125716 A JPH02125716 A JP H02125716A
- Authority
- JP
- Japan
- Prior art keywords
- parison
- molten parison
- molten
- plate member
- mold
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000004033 plastic Substances 0.000 title claims abstract description 12
- 239000011796 hollow space material Substances 0.000 title abstract 3
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 17
- 238000007664 blowing Methods 0.000 abstract description 6
- 238000001125 extrusion Methods 0.000 abstract description 6
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 238000003466 welding Methods 0.000 description 6
- 238000005192 partition Methods 0.000 description 5
- 238000009864 tensile test Methods 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 241001648319 Toronia toru Species 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002991 molded plastic 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
- B29C49/20—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
- B29C2049/2008—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 inside 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
- B29C49/20—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
- B29C2049/2008—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 inside the article
- B29C2049/2013—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 inside the article for connecting opposite walls, e.g. baffles in a fuel tank
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、ブロー成形された中空体であって、その内壁
面に溶着された板部材を有するプラスチック中空体の製
造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a blow-molded plastic hollow body having a plate member welded to its inner wall surface.
［従来の技術］
従来、内部に仕切壁な有するプラスチック中空体の製造
方法としては、下記の（イ）および（ロ）の方法が知ら
れている。[Prior Art] Conventionally, the following methods (a) and (b) are known as methods for manufacturing hollow plastic bodies having partition walls inside.
（イ）第６図に示すように、型開きした複数に分割され
た金型１３．１４間に押出した熱可塑性樹脂の溶融パリ
メン１１内部に、インサート部品１２を把持させた杆体
１５を挿入し、一部の金型１３を型閉じすることによっ
て前記インサート部品１２の両端縁をパリスン１１の内
壁面に圧着させ、ついで前記杆体１５を金型外へ取出し
、残りの金型全部を型閉じしたのちパリスンｌｌ内へエ
アー吹込みする方法（特開昭５６−２８８３１号公報参
照）。(a) As shown in FIG. 6, the rod 15 holding the insert part 12 is inserted into the molten thermoplastic resin 11 extruded between the opened molds 13 and 14. By closing a part of the mold 13, both ends of the insert part 12 were pressed against the inner wall surface of the parison 11, and then the rod 15 was taken out of the mold, and all the remaining molds were closed. A method of subsequently blowing air into the parison 1 (see Japanese Patent Laid-Open No. 56-28831).
（ロ）第７図に示すように、型開きした接合用突部２３
ａを有する金型間に押出された熱可塑性１ｆｔｆ脂の溶
融バリメン２１内に、周縁部に膨出部２４を形成した仕
切壁２２を配置し、ついで前記金型２３を型閉じするこ
とによって前記膨出部２４をパリスン２１によって把持
した状態に接合したのち、前記パリスフ２１内へ圧力流
体を吹込む方法（特開昭５５−２１２０７号公報参照）
。(b) As shown in FIG. 7, the mold-opened joining protrusion 23
A partition wall 22 having a bulging portion 24 formed at the peripheral edge is placed in a molten bariumen 21 made of thermoplastic 1 ftf resin extruded between molds having a shape, and then the mold 23 is closed. A method of blowing pressure fluid into the parison 21 after the bulging portion 24 is held and joined by the parison 21 (see Japanese Patent Laid-Open No. 55-21207)
.
［発明が解決しようとする課題］
上記（イ）の方法は、成形工程が複雑である上インサー
ト周縁部とパリスン内壁面との接着強度が弱く、上記（
ロ）の方法は、仕切部材の周縁部とパリスン内壁面との
接着強度は大きくなるが、仕切部材を正確に金型の接合
用突部に位置決めしないと不良品を生じてしまうという
問題点があった。[Problems to be Solved by the Invention] In the method (A) above, the adhesive strength between the peripheral edge of the upper insert and the inner wall surface of the parison is weak, and the molding process is complicated.
Method b) increases the adhesive strength between the peripheral edge of the partition member and the inner wall surface of the parison, but it has the problem of producing defective products unless the partition member is accurately positioned on the joining protrusion of the mold. there were.
本発明は、上記従来の技術の有する問題点に鑑みてなさ
れたものであり、成形工程が簡単であるにもかかわらず
、板部材の位置決めに若干のくろいがあっても、前記板
部材とパリスン内壁面との接合強度が大きいプラスチッ
ク中空体の製造方法を提供することを目的とするもので
ある。The present invention has been made in view of the problems of the above-mentioned conventional techniques, and although the molding process is simple, the plate member and the parison can be easily aligned even if there is some imperfection in the positioning of the plate member. The object of the present invention is to provide a method for manufacturing a plastic hollow body that has a high bonding strength with an inner wall surface.
［課題を解決するための手段］
上記目的を達成するため、本発明のプラスチック中空体
の製造方法は、型開きした分割形式の金型の間に押出さ
れた熱可塑性樹脂の溶融パリスン内に、少なくとも１側
縁部に薄肉フランジ部を有する熱可塑性樹脂製の板部材
を配設したのち、前記金型を型閉じすることによって、
前記薄肉フランジ部を前記溶融パリスンの内壁に当接さ
せて該溶融パリスンの熱により溶着し、ついでパリスン
内に加圧流体を吹込む工程からなる。[Means for Solving the Problems] In order to achieve the above object, the method for manufacturing a plastic hollow body of the present invention includes a method for manufacturing a hollow plastic body, in which a molten parison of thermoplastic resin extruded between an open split-type mold, By disposing a thermoplastic resin plate member having a thin flange portion on at least one side edge, and then closing the mold,
The thin flange portion is brought into contact with the inner wall of the molten parison and welded by the heat of the molten parison, and then pressurized fluid is blown into the parison.
また、前記薄肉フランジ部の厚さを０．２〜０．８１１
Ｉｍの範囲内とすると効果的である。Further, the thickness of the thin flange portion is set to 0.2 to 0.811.
It is effective to set it within the range of Im.
［作用］
型開きした分割形式の金型の間に押出した熱可塑性樹脂
の溶融パリスン内に、少なくとも１側縁部に薄肉フラン
ジ部を有する熱可塑性１Ｍ脂製の板部材を配設したのち
、前記金型を型閉じすると１、溶融パリスンが金型によ
り変形してその内壁と前記薄肉フランジ部の表面とが当
接し、前記溶融パリスンの熱によって、先ず前記薄肉フ
ランジ部の表面部が溶融し、さらに金型を完全に型閉じ
すると、前記薄肉フランジ部は溶融パリスン内壁面に押
圧されて溶融が進行すると同時に変形されて全面的に溶
着される。ついで、前記パリスン内に加圧流体を吹込む
と、パリスンは金型キャビティ形状に沿って膨張され、
パリスン内壁と板部材の薄肉フランジ部とが溶着された
、プラスチック中空体が成形される。[Function] After disposing a plate member made of thermoplastic 1M resin having a thin flange portion on at least one side edge in a molten parison of thermoplastic resin extruded between open split-type molds, When the mold is closed, 1, the molten parison is deformed by the mold and its inner wall comes into contact with the surface of the thin flange portion, and the surface portion of the thin flange portion is first melted by the heat of the molten parison. Further, when the mold is completely closed, the thin flange portion is pressed against the inner wall surface of the molten parison, and as melting progresses, it is simultaneously deformed and welded over the entire surface. Then, when pressurized fluid is blown into the parison, the parison is expanded along the shape of the mold cavity,
A plastic hollow body is formed in which the inner wall of the parison and the thin flange portion of the plate member are welded together.
［実施例］ 実施例を図面に基づいて説明する。[Example] Examples will be described based on the drawings.
第１図は、本発明の方法の一実施例によってブロー成形
された自動車用の吸気ダクトを示し、該吸気ダクトは、
円筒状の接続部ｌに続く肩部２を有し、該肩部２から直
線状に伸びる偏平通路３を備え、該偏平通路３の中心部
位の対向する内壁には、流路に沿って板部材４が溶着さ
れている。そして、前記板部材４は偏平通路３の補強と
ともに送風時における気流の整流作用を図るために設け
られたものであるので、偏平通路３の内壁と板部材４と
の溶着強度が大きくならなければならない。FIG. 1 shows an air intake duct for an automobile blow-molded according to an embodiment of the method of the invention, the air intake duct comprising:
It has a shoulder portion 2 that continues to the cylindrical connecting portion l, and is provided with a flat passageway 3 extending linearly from the shoulder portion 2, and a plate is provided on the opposite inner wall of the central portion of the flat passageway 3 along the flow path. Member 4 is welded. Since the plate member 4 is provided to reinforce the flat passage 3 and to rectify the airflow during air blowing, the welding strength between the inner wall of the flat passage 3 and the plate member 4 must be increased. It won't happen.
次に、上記吸気ダクトの製造工程について説明する。Next, the manufacturing process of the above-mentioned intake duct will be explained.
本実施例において使用する第２図に示す板部材４は、熱
可塑性樹脂を射出成形等の適宜手段により予め成形した
もので、その両側縁部にはそれぞれ薄肉フランジ部５を
有する。該薄肉フランジ部５はその基部５ａから先端部
５ｂにかけてテーバ状に形成されているが、これに限ら
ず基部５ａと先端部５ｂが同一の厚さのものでもよい、
しかし後述するように、少なくともその先端部の厚さは
、溶融パリソンが当接したときその熱で溶融するような
薄いものでなくてはならない。The plate member 4 shown in FIG. 2 used in this embodiment is pre-molded from thermoplastic resin by an appropriate means such as injection molding, and has thin flange portions 5 on both side edges thereof. The thin flange portion 5 is formed in a tapered shape from the base portion 5a to the tip portion 5b, but the present invention is not limited to this, and the base portion 5a and the tip portion 5b may have the same thickness.
However, as will be described later, at least the thickness of the tip must be so thin that it will be melted by the heat when the molten parison comes into contact with it.
第３図（Ａ）、（Ｂ）に示すように、型開きした分割形
式の金型６，６″間に、図示しない押出機の押出ヘッド
９より熱可塑性樹脂の溶融パリスン７を押出し、該溶融
パリスン７内に支承部材８に支持した前記板部材４を挿
入して配設する。この場合、板部材４を支持した支承部
材８を型開きした金型６．６″間に配設したのち、前記
押出ヘッド９より溶融パリスン７を押出してもよい。As shown in FIGS. 3(A) and 3(B), a molten parison 7 of thermoplastic resin is extruded from an extrusion head 9 of an extruder (not shown) between the opened split-type molds 6 and 6''. The plate member 4 supported by the support member 8 is inserted into the molten parison 7. In this case, the support member 8 supporting the plate member 4 is placed between the opened molds 6.6". Afterwards, the molten parison 7 may be extruded from the extrusion head 9.
ついで前記金型６，６′を型閉じすると、溶融パリスン
７が金型６．６″によって押圧変形されてその内壁が板
部材４の両側縁部の薄肉フランジ部５に当接し、溶融パ
リスン７の熱によって前記薄肉フランジ部５の表面が先
ず溶融し、さらに前記溶融パリスン内壁面に押圧されて
溶融が進行すると同時に変形されて全面的に溶着される
。そののち図示しない適宜吹込み手段により、加圧空気
等の加圧流体を前記パリスン内に吹込んで、第４図に示
すように、前記パリスン７をキャビティ６ａ、６ａ’に
沿って膨張させ、これを冷却固化させたのち金型６．６
′を型開きして成形された中空体を取出す。Then, when the molds 6 and 6' are closed, the molten parison 7 is pressed and deformed by the mold 6.6'', and its inner wall abuts against the thin flange portions 5 on both side edges of the plate member 4, and the molten parison 7 The surface of the thin flange portion 5 is first melted by the heat, and is further pressed against the inner wall surface of the molten parison, and at the same time as the melting progresses, it is deformed and welded over the entire surface.Then, by an appropriate blowing means (not shown), A pressurized fluid such as pressurized air is blown into the parison to expand the parison 7 along the cavities 6a and 6a' as shown in FIG. 4, and after cooling and solidifying it, the mold 6. 6
Open the mold and take out the molded hollow body.
上記実施例においては、板部材４の両側線部に薄肉フラ
ンジ部５をそれぞれ設けたものを示したが、これに限ら
ず、図示しないが板部材のｌ側縁部にのみ薄肉フランジ
部を設けたものを用いることもできるし、また、プラス
チック中空体の形状によっては、板部材の３個以上の側
縁部に薄肉フランジ部を設けたものを用いることもでき
る。この場合、板部材に設けられた薄肉フランジ部と溶
融パリスン内壁面とが上記実施例の場合と同様に溶着さ
れ、該溶着された部分の接合強度が大きくなる。In the above embodiment, the thin flange portions 5 are provided on both side line portions of the plate member 4, but the present invention is not limited to this, and although not shown, the thin flange portions are provided only on the L side edge of the plate member. Depending on the shape of the plastic hollow body, it is also possible to use a plate member with thin flanges on three or more side edges. In this case, the thin flange portion provided on the plate member and the inner wall surface of the molten parison are welded in the same manner as in the above embodiment, and the bonding strength of the welded portion is increased.
また、ｌ側縁部にのみ薄肉フランジ部を設けた板部材を
用いる場合は、前記薄肉フランジ部を一方の金型へ片寄
せして薄肉フランジ部と溶融パリスン内壁とが型閉じに
より確実に当接するようにするとよい。In addition, when using a plate member having a thin flange portion only on the l side edge, the thin flange portion may be shifted toward one of the molds to ensure that the thin flange portion and the inner wall of the molten parison come into contact with each other by closing the mold. It is best to make them touch each other.
さらに、前記薄肉フランジ部５の肉厚は、前記したよう
に溶融パリスンの熱により溶融されるような薄いもので
なくてはならないが、あまり薄くすると予め板部材を成
形する際に一工程で成形することが困難となる。実験の
結果、板部材の薄肉フランジ部の肉厚を０．２〜０．８
ｍｍの範囲内とすると、予め板部材を射出成形によリー
工程で成形することができる上、パリスン内壁面と薄肉
フランジ部表面との接合強度が大きいプラスチック中空
体を成形することができた。Furthermore, the thickness of the thin flange portion 5 must be so thin that it can be melted by the heat of the molten parison as described above, but if it is made too thin, it will be formed in one step when forming the plate member in advance. It becomes difficult to do so. As a result of the experiment, the thickness of the thin flange part of the plate member was set to 0.2 to 0.8.
If it is within the range of mm, the plate member can be formed in advance in a Lee process by injection molding, and a plastic hollow body with a high bonding strength between the inner wall surface of the parison and the surface of the thin flange portion can be molded.
両側縁部に形成されたフランジ部の厚さが異なるポリプ
ロピレン製板部材を９種類準備し、上記板部材なポリプ
ロピレンの溶融パリスン内に配設して、金型な型閉じす
ることにより板部材の両側縁を溶融パリスン内壁に当接
させて該溶融パリスンの熱により溶着し、ついでパリス
ン内に加圧流体を吹込むことにより、第１図に示すよう
な吸気ダクトを成形した０次に成形された吸気ダクトに
おける板部材とパリスンから成形されたダクト内壁面と
の接合強度を評価するため引張試験を行なった。’Ｈｉ
ｒｌ類の板部材のフランジ部厚さ及び引張試験の測定結
果を以下の表に示す。Nine types of polypropylene plate members with different thicknesses of the flange portions formed on both side edges are prepared, placed in the molten polypropylene parison that is the plate member, and closed with a mold to form the plate member. By bringing both side edges into contact with the inner walls of the molten parison and welding them using the heat of the molten parison, and then blowing pressurized fluid into the parison, an air intake duct as shown in Fig. 1 was formed. A tensile test was conducted to evaluate the bonding strength between the plate member and the duct inner wall surface formed from parisson in the intake duct. 'Hi
The measurement results of the flange thickness and tensile test of the RL type plate members are shown in the table below.
（１）吸気ダクト
平均肉厚 ２ｍｍ
偏平通路の外形寸法（高さｘ幅） ５５ｍｍＸ １２
５ｍｍ板部材の肉厚 ２ｍｍ
板部材のダクト通路に沿った溶着長さ ６０ｍｍ板部材
のフランジ部の先端部幅 ８ｍｍ（２）引張試験
成形された吸気ダクトの切欠き２ｂに沿って偏平通路の
四辺から肩部２付近まで予め切断し、対向する突条２ａ
を有するダクトの開口した一方壁を固定治具に他方壁を
引張治具に取付け、引張試験機にて引張り速度５０ｍｍ
／ｍｉｎの速度でダクトの対向壁面が上下方向にめくれ
ていくような状態で引張試験を行ない、板部材が壁面と
分離した時の強度を測定した。なお、表に示した数値は
それぞれ５個ずつ測定した結果の平均値を示す。(1) Intake duct average wall thickness 2mm External dimensions of flat passage (height x width) 55mm x 12
Wall thickness of 5mm plate member: 2mm Length of welding along the duct passage of the plate member: Width at the tip of the flange of the 60mm plate member: 8mm (2) Tensile test Welding along the four sides of the flat passage along the notch 2b of the formed intake duct The opposing protrusions 2a are cut in advance from to the vicinity of the shoulder portion 2.
Attach one open wall of the duct with a fixing jig and the other wall to a tension jig, and use a tensile tester at a tensile speed of 50 mm.
A tensile test was conducted with the opposing wall surface of the duct being turned up and down in the vertical direction at a speed of 1/min, and the strength when the plate member was separated from the wall surface was measured. In addition, the numerical values shown in the table indicate the average value of the results of measuring 5 pieces each.
（３）評価
表に示すように、フランジ部の厚さが１ ｎ＋ｍ（徹４
）と０．８ ｍｍ （Ｎａ ５ ）とでは測定結果にお
いて急激な強度変化がみられ、０．８ ｍｍ （＆ ５
）〜０．２ ｍｍ （Ｎｌ１９ ）は実用上充分な強
度が得られた。(3) As shown in the evaluation table, the thickness of the flange part is 1 n+m (Toru 4
) and 0.8 mm (Na 5 ), a rapid change in intensity was observed in the measurement results;
) to 0.2 mm (Nl19), a practically sufficient strength was obtained.
［発明の効果コ
本発明は、上記のように構成されているので、以下に記
載するような効果を奏する。[Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.
板部材の薄肉フランジ部が溶融パリスン内壁面に当接さ
れて該溶融パリスンの熱によりその表面部位が溶融する
とともに変形し、溶融パリスン内壁面に全面的に溶着さ
れるので、前記板部材の位置決めが若干ずれたとしても
該溶着による接合強度が大きな中空体を製造することが
できる。The thin flange portion of the plate member is brought into contact with the inner wall surface of the molten parison, and its surface portion is melted and deformed by the heat of the molten parison, and is completely welded to the inner wall surface of the molten parison, so that the positioning of the plate member is easy. Even if the welding deviates slightly, it is possible to manufacture a hollow body with a high bonding strength due to the welding.
また、薄肉フランジ部の肉厚を０．２〜０．８ｍｍの範
囲内とすると、薄肉フランジ部を有する板部材を射出成
形等により一工程で成形できる上、パリスン内壁面と薄
肉フランジ部との溶着部の接合強度のより大きなプラス
チック中空体を製造することができる。Furthermore, if the thickness of the thin flange is within the range of 0.2 to 0.8 mm, the plate member having the thin flange can be molded in one step by injection molding, etc., and the inner wall surface of the parison and the thin flange can be formed in one step. It is possible to manufacture a plastic hollow body with greater joint strength at the welded portion.
第１図は、本発明の方法の一実施例によって製造した自
動車用吸気ダクトを示す斜視図、第２図は板部材の一例
を示す側面図、第３図は型開きした金型間へ押出した溶
融パリスン内に板部材を配設した状態を示し、（Ａ）は
その側断面図、（Ｂ）は（Ａ）のＡ−Ａ線に沿う断面図
、第４図は型閉じしたのちパリスン内に加圧流体を吹込
んだ状態を示し、（Ａ）はその側断面図、ＣＢ）は（Ａ
）のＡ−Ａ線に沿った断面図、第５図は溶融パリスン内
壁面に薄肉フランジ部が溶着された状態を示す要部断面
図、第６図および第７図はそれぞれ従来の内部に仕切壁
を有するプラスチック中空体の製造方法を示す要部断面
図である。
４・・・板部材、
６゜
５・・・薄肉フランジ部、
５ａ・・・基部、
５ｂ・・・先端部、
６′・・・金型、
６ａ・・・キャビティ、
７・・・溶融パリスン、
８・・・支承部材、
９・・・押出ヘッド。
特許出願人 キョーラク株式会社Fig. 1 is a perspective view showing an automobile intake duct manufactured by an embodiment of the method of the present invention, Fig. 2 is a side view showing an example of a plate member, and Fig. 3 is an extrusion between opened molds. (A) is a side cross-sectional view, (B) is a cross-sectional view taken along line A-A in (A), and Figure 4 shows the plate member placed inside the molten parison after the mold is closed. (A) is a side cross-sectional view, and (CB) is (A).
), FIG. 5 is a cross-sectional view of the main part showing the thin flange welded to the inner wall surface of the molten parison, and FIGS. 6 and 7 are the conventional internal partitions, respectively. FIG. 2 is a cross-sectional view of main parts showing a method for manufacturing a plastic hollow body having walls. 4... Plate member, 6゜5... Thin flange portion, 5a... Base, 5b... Tip, 6'... Mold, 6a... Cavity, 7... Molten parison , 8... Support member, 9... Extrusion head. Patent applicant Kyoraku Co., Ltd.
Claims (1)
た熱可塑性樹脂の溶融パリスン（７）内に、少なくとも
１側縁部に薄肉フランジ部（５）を有する熱可塑性樹脂
製の板部材（４）を配設したのち、前記金型（６、６′
）を型閉じすることによって、前記薄肉フランジ部（５
）を前記溶融パリスン（７）の内壁に当接させて該溶融
パリスン（７）の熱により溶着し、ついでパリスン内に
加圧流体を吹込むことを特徴とするプラスチック中空体
の製造方法。 ２、薄肉フランジ部（５）の厚さを０．２〜０．８ｍｍ
の範囲内とした請求項１記載のプラスチック中空体の製
造方法。[Claims] 1. A thin flange portion (5) on at least one side edge in a molten parison (7) of thermoplastic resin extruded between open split-type molds (6, 6'). After disposing the plate member (4) made of thermoplastic resin having
) by closing the mold, the thin flange part (5
) is brought into contact with the inner wall of the molten parison (7) and welded by the heat of the molten parison (7), and then pressurized fluid is blown into the parison. 2. The thickness of the thin flange part (5) is 0.2 to 0.8 mm.
The method for manufacturing a plastic hollow body according to claim 1, wherein the manufacturing method is within the range of .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63277268A JPH0622866B2 (en) | 1988-11-04 | 1988-11-04 | Method for producing plastic hollow body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63277268A JPH0622866B2 (en) | 1988-11-04 | 1988-11-04 | Method for producing plastic hollow body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02125716A true JPH02125716A (en) | 1990-05-14 |
| JPH0622866B2 JPH0622866B2 (en) | 1994-03-30 |
Family
ID=17581154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63277268A Expired - Lifetime JPH0622866B2 (en) | 1988-11-04 | 1988-11-04 | Method for producing plastic hollow body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0622866B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5514323A (en) * | 1992-09-18 | 1996-05-07 | Solvay Automotive, Inc. | Method for making a blow-molded fuel tank containing a breathing system |
| WO2011077719A1 (en) * | 2009-12-25 | 2011-06-30 | 日野自動車株式会社 | Air intake duct and method for producing same |
-
1988
- 1988-11-04 JP JP63277268A patent/JPH0622866B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5514323A (en) * | 1992-09-18 | 1996-05-07 | Solvay Automotive, Inc. | Method for making a blow-molded fuel tank containing a breathing system |
| WO2011077719A1 (en) * | 2009-12-25 | 2011-06-30 | 日野自動車株式会社 | Air intake duct and method for producing same |
| JP2011132910A (en) * | 2009-12-25 | 2011-07-07 | Hino Motors Ltd | Air intake duct and production method thereof |
| CN102656359A (en) * | 2009-12-25 | 2012-09-05 | 日野自动车株式会社 | Air intake duct and method for producing same |
| CN102656359B (en) * | 2009-12-25 | 2014-12-10 | 日野自动车株式会社 | Air intake duct and method for producing same |
| US9822740B2 (en) | 2009-12-25 | 2017-11-21 | Hino Motors, Ltd. | Air intake duct and method for producing same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0622866B2 (en) | 1994-03-30 |
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