JPH0622866B2 - Method for producing plastic hollow body - Google Patents
Method for producing plastic hollow bodyInfo
- Publication number
- JPH0622866B2 JPH0622866B2 JP63277268A JP27726888A JPH0622866B2 JP H0622866 B2 JPH0622866 B2 JP H0622866B2 JP 63277268 A JP63277268 A JP 63277268A JP 27726888 A JP27726888 A JP 27726888A JP H0622866 B2 JPH0622866 B2 JP H0622866B2
- Authority
- JP
- Japan
- Prior art keywords
- parison
- thin
- plate member
- flange portion
- molten parison
- 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 - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000004033 plastic Substances 0.000 title claims description 11
- 229920005992 thermoplastic resin Polymers 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 7
- 239000000088 plastic resin Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 8
- 238000005192 partition Methods 0.000 description 5
- 238000009864 tensile test Methods 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000003466 welding Methods 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
- 238000007664 blowing Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 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)
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。Description: TECHNICAL FIELD The present invention relates to a method for producing a blow-molded hollow body having a plate member welded to its inner wall surface.
［従来の技術］ 従来、内部に仕切壁を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 a plastic hollow body having a partition wall 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
スン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１１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 component 12 is inserted into the molten parison 11 of the thermoplastic resin extruded between the molds 13 and 14 divided into a plurality of molds. By closing a part of the mold 13, the both end edges of the insert part 12 are crimped to the inner wall surface of the parison 11, then the rod 15 is taken out of the mold, and all the remaining molds are closed. After that, air is blown into the parison 11 (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樹脂の溶融パリ
スン２１内に、周縁部に膨出部２４を形成した仕切壁２
２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、前記パリスン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 protrusion 23 for joining is opened.
A partition wall 2 in which a bulging portion 24 is formed in a peripheral edge portion in a molten parison 21 of a thermoplastic resin extruded between molds having a.
2 is arranged, and then the mold 23 is closed to join the bulging portion 24 in a state in which the bulging portion 24 is gripped by the parison 21, and then a pressure fluid is blown into the parison 21 (JP-A-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 above method (a), the molding process is complicated, and the adhesive strength between the upper insert peripheral edge and the inner wall surface of the parison is weak, and the method (b) is the peripheral edge of the partition member. Although the adhesive strength between the section and the inner wall surface of the parison becomes large, there is a problem that a defective product is produced unless the partition member is accurately positioned on the protrusion for joining the mold.
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るいがあっても、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-described conventional techniques, and despite the fact that the molding process is simple, the plate member and It is an object of the present invention to provide a method for producing a plastic hollow body having a high bonding strength with the inner wall surface of a parison.
［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, a method for producing a plastic hollow body of the present invention is as follows: in a molten parison of a thermoplastic resin extruded between molds of a split-type split mold, After disposing a plate member made of a thermoplastic resin having a thin flange portion on at least one side edge portion, by closing the die,
The thin flange portion is brought into contact with the inner wall of the molten parison to be welded by the heat of the molten parison, and then a pressurized fluid is blown into the parison.
また、前記薄肉フランジ部の厚さを0.2 〜0.8 mmの範囲
内とすると効果的である。Further, it is effective to set the thickness of the thin-walled flange portion within a range of 0.2 to 0.8 mm.
［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樹脂製の板部材を配設したのち、
前記金型を型閉じすると、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。[Operation] After arranging a plate member made of a thermoplastic resin having a thin flange portion on at least one side edge portion in a molten parison of the thermoplastic resin extruded between the molds of the molds having split molds,
When the mold is closed, the molten parison is deformed by the mold and its inner wall contacts the surface of the thin flange portion, and the heat of the molten parison causes the surface portion of the thin flange portion to melt first. Further, when the mold is completely closed, the thin-walled flange portion is pressed against the inner wall surface of the molten parison to be melted, and at the same time, is deformed and entirely welded. Then, when a pressurized fluid is blown into the parison, the parison is expanded along the mold cavity shape,
A plastic hollow body, in which the inner wall of the parison and the thin flange portion of the plate member are welded, is molded.
［実施例］ 実施例を図面に基づいて説明する。[Example] An example will be described with reference to 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１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 automotive air intake duct blow molded according to one embodiment of the method of the present invention, the air intake duct comprising:
A flat passage 3 having a shoulder 2 following a cylindrical connecting portion 1 and extending linearly from the shoulder 2 is provided, and a plate along the flow path is provided on the inner walls facing each other at the central portion of the flat passage 3. The member 4 is welded. Since the plate member 4 is provided to reinforce the flat passage 3 and to rectify the air flow at the time of blowing air, unless the welding strength between the inner wall of the flat passage 3 and the plate member 4 becomes large. I won't.
次に、上記吸気ダクトの製造工程について説明する。Next, a manufacturing process of the intake duct will be described.
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にかけてテーパ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 formed by molding thermoplastic resin in advance by an appropriate means such as injection molding, and has thin flange portions 5 on both side edges thereof. Although the thin flange portion 5 is formed in a tapered shape from the base portion 5a to the tip portion 5b, 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 portion must be thin enough to be melted by the heat of the molten parison when it comes into contact with the molten parison.
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 a thermoplastic resin is extruded from an extruding head 9 of an extruder (not shown) between the molds 6 and 6'in which the molds are opened. The plate member 4 supported by the support member 8 is inserted and arranged in the molten parison 7. In this case, the supporting member 8 supporting the plate member 4 may be arranged between the opened molds 6 and 6 ', and then the molten parison 7 may be extruded from the extruding 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 molds 6 and 6 ', and the inner wall thereof abuts the thin flange portions 5 on both side edges of the plate member 4, and the molten parison 7 is melted. The surface of the thin-walled flange portion 5 is first melted by the heat of, and is further pressed by the inner wall surface of the molten parison so that the melting progresses and is simultaneously deformed and welded over the entire surface. Thereafter, a pressurized fluid such as pressurized air is blown into the parison by an appropriate blowing means (not shown), and the parison 7 is moved into the cavities 6a and 6a 'as shown in FIG.
It is expanded along with, it is cooled and solidified, and then the mold 6,
6'is opened and the molded hollow body is taken out.
上記実施例においては。板部材４の両側縁部に薄肉フラ
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１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 example. Although the thin flange portions 5 are provided on both side edges of the plate member 4 respectively, the present invention is not limited to this, and a thin flange portion provided only on one side edge of the plate member may be used although not shown. Alternatively, depending on the shape of the hollow plastic body, a plate member having three or more side edge portions provided with thin flange portions may be used. 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-described embodiment, and the joint strength of the welded portion is increased.
また、１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。When a plate member having a thin flange portion only on one side edge is used, the thin flange portion is moved to one of the molds to ensure that the thin flange portion and the molten parison inner wall are closed by the mold closing. You should contact them.
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り一工程で
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。Further, the thickness of the thin flange portion 5 must be thin so that it can be melted by the heat of the melting parison as described above, but if it is too thin, it can be molded in one step when the plate member is molded in advance. Will be difficult to do. As a result of the experiment, if the thickness of the thin-walled flange portion of the plate member is within the range of 0.2 to 0.8 mm, the plate member can be pre-molded in one step by injection molding, and the inner wall surface of the parison and the surface of the thin-walled flange portion It was possible to mold a plastic hollow body having a high bonding strength.
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、上記板部材をポリプ
ロピレンの溶融パリスン内に配設して、金型を型閉じす
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。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。９種類
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 having different thicknesses of flange portions formed on both side edges are prepared, the plate members are arranged in a polypropylene melt parison, and the mold is closed to close the plate members. Both side edges were brought into contact with the inner wall of the molten parison to be welded by the heat of the molten parison, and then a pressurized fluid was blown into the parison to form an intake duct as shown in FIG. Next, a tensile test was conducted in order to evaluate the joint strength between the plate member and the inner wall surface of the duct formed from Paris in the formed intake duct. The following table shows the flange thicknesses of nine types of plate members and the measurement results of the tensile test.
（１）吸気ダクト 平均肉厚 ２mm 偏平通路の外形寸法（高さ×幅）55mm×125mm 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 125mm Thickness of plate member 2mm Length of welding along duct passage of plate member 60mm Tip width of flange of plate member 8mm (2) Tensile test Along the notch 2b of the formed intake duct, the flat passage is preliminarily cut from the four sides to the vicinity of the shoulder 2, and the opposing ridges 2a are cut.
Attach the one wall with the open duct to the fixing jig and the other wall to the tension jig, and pull at a tension tester of 50 mm / min.
A tensile test was conducted at a speed of 2 with the opposing wall surface of the duct turning up and down, and the strength when the plate member separated from the wall surface was measured. The numerical values shown in the table are the average values of the results obtained by measuring 5 each.
（３）評価 表に示すように、フランジ部の厚さが１mm（No.４）と
0.8 mm（No.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（No.５）〜0.2 mm（No.９）は実用
上充分な強度が得られた。(3) Evaluation As shown in the table, the thickness of the flange is 1 mm (No. 4)
A sharp change in strength was observed in the measurement results at 0.8 mm (No. 5), and a practically sufficient strength was obtained at 0.8 mm (No. 5) to 0.2 mm (No. 9).
［発明の効果］ 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。[Advantages of the Invention] Since the present invention is configured as described above, it has the effects described below.
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-walled flange portion of the plate member is brought into contact with the inner wall surface of the molten parison, and the surface portion thereof is melted and deformed by the heat of the molten parison, and the entire surface is welded to the inner wall surface of the molten parison. It is possible to manufacture a hollow body having a large bonding strength due to the welding even if there is a slight deviation.
また、薄肉フランジ部の肉厚を0.2 〜0.8 mm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。When the thickness of the thin-walled flange is within the range of 0.2 to 0.8 mm, a plate member having a thin-walled flange can be molded in one step by injection molding, etc., and the welded portion between the Paris inner wall surface and the thin-walled flange can be formed. It is possible to manufacture a hollow plastic body having a higher bonding strength.
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、（Ｂ）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、 ５……薄肉フランジ部、 ５ａ……基部、 ５ｂ……先端部、 ６，６′……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。FIG. 1 is a perspective view showing an air intake duct for an automobile 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 extrusion between molds opened. The state where the plate member is arranged in the molten parison is shown, (A) is a side sectional view thereof, (B) is a sectional view taken along the line AA of (A), and FIG. 4 is a mold after closing the parison. A state in which a pressurized fluid is blown into the inside is shown, (A) is a side sectional view thereof, (B) is a sectional view taken along the line AA of (A), and FIG. 5 is a thin wall on the inner surface of the molten parison. FIG. 6 and FIG. 7 are cross-sectional views of the main part showing a state in which the flange portion is welded, and FIG. 6 and FIG. 7 are cross-sectional views of the main part showing a conventional method for manufacturing a plastic hollow body having a partition wall inside. 4 ... Plate member, 5 ... Thin flange part, 5a ... Base part, 5b ... Tip part, 6, 6 '... Mold, 6a ... Cavity, 7 ... Molten parison, 8 ... Bearing member, 9 ... Extrusion head.
Claims (2)
に押出し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。1. Heat having a thin-walled flange portion (5) at least at one side edge in a molten parison (7) of a thermoplastic resin extruded between molds (6, 6 ') of divided molds opened. After disposing the plate member (4) made of a plastic resin, the mold (6, 6 ') is closed to bring the thin flange portion (5) into contact with the inner wall of the molten parison (7). A method for producing a hollow plastic body, characterized in that the molten parison (7) is welded by heat and then a pressurized fluid is blown into the parison.
mm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。2. The thin flange portion (5) has a thickness of 0.2 to 0.8.
The method for producing a plastic hollow body according to claim 1, wherein the diameter is within the range of mm.
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 JPH02125716A (en) | 1990-05-14 |
| JPH0622866B2 true 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) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0588420B1 (en) * | 1992-09-18 | 1997-12-29 | SOLVAY AUTOMOTIVE, Inc. | Internal gas removal system for a fuel tank and method of making thereof |
| JP5325764B2 (en) * | 2009-12-25 | 2013-10-23 | 日野自動車株式会社 | Intake duct and manufacturing method thereof |
-
1988
- 1988-11-04 JP JP63277268A patent/JPH0622866B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02125716A (en) | 1990-05-14 |
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