JPS5856827A - Molding method of hollow article with partition plate - Google Patents

Molding method of hollow article with partition plate

Info

Publication number
JPS5856827A
JPS5856827A JP56155371A JP15537181A JPS5856827A JP S5856827 A JPS5856827 A JP S5856827A JP 56155371 A JP56155371 A JP 56155371A JP 15537181 A JP15537181 A JP 15537181A JP S5856827 A JPS5856827 A JP S5856827A
Authority
JP
Japan
Prior art keywords
parison
sheet
partition plate
mold
air
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
Application number
JP56155371A
Other languages
Japanese (ja)
Other versions
JPH0216209B2 (en
Inventor
Hiroshi Miyagi
宮城　浩
Toshiki Kondo
近藤　敏樹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resonac Holdings Corp
Original Assignee
Showa Denko KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Showa Denko KK filed Critical Showa Denko KK
Priority to JP56155371A priority Critical patent/JPS5856827A/en
Publication of JPS5856827A publication Critical patent/JPS5856827A/en
Publication of JPH0216209B2 publication Critical patent/JPH0216209B2/ja
Granted legal-status Critical Current

Links

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
    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/075—Preforms or parisons characterised by their configuration having at least one internal separating wall
    • 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

  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To mold a hollow article with a partition plate by a conventional blow molding method, by a process wherein a parison and a sheet placed in the interior of the parison and having at least one end thereof separated from the parison are extruded through the same die or are injection molded, and after jointing the parison and the sheet with each other into an integral body, air is blown therein. CONSTITUTION:A molten resin is extruded through a slit into a metallic mold 6 for blow molding provided below an extrusion die 1, thereby producing the parison 7 and the sheet 9 located in the interior of the parison 7 with both ends thereof separated from the parison 7 by gaps 8, 8. Next, the mold 6 is closed, an upper and an opening end 7a of the parison 7 are closed, and an end part of the parison 7 and an end part 9a of the sheet 9 are jointed to each other to one body. Then, the parison 7 is fully inflated in the cavity of the mold 5 by using an air pin 5. In this case, both ends of the sheet 9 are separated from the parison 7 by the gaps 8, 8 which permit air to flow therethrough. Accordingly, a hollow article can be molded by a conventional method.

Description

【発明の詳細な説明】 本発明はブロー成形により内部に仕切板を有する熱可塑
性樹脂の中空成形品お製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a thermoplastic resin hollow molded article having an internal partition plate by blow molding.

特に液体容器としての中空成形品の内部に仕切板を設け
ることは、剛性の向上のみなちず、内容液の揺動音対策
としての防波効果をも有する。しかしながら、溶融状態
の熱可塑性樹脂をダイから押出してパリソンを形成し、
その〕（リソンの開口端を閉鎖して直ちにエアブローを
行ない、パリソンを所望の中空成形品に成形するブロー
成形法では、キャビティへ押出したパリソンを直ちに閉
鎖することから、仕切板となる部材をパリソン内に挿入
するには他に特別な手段が必要とされている。またバリ
ン／の側部なブロー金型内にて部分的に押込んで、パリ
ソン内部に仕切板となる部分を成形することも考えられ
るが、このような手段は板状の中空成形品に対しては可
能であっても、煩雑でブローアツプ比の大きな形状の中
空成形品の成形にはきわめて困難であり、結局、ブロー
成形による中空成形品には補強用のリプは設けられてい
ても、仕切板は設けることは容易なことではない。In particular, providing a partition plate inside a hollow molded product serving as a liquid container not only improves rigidity but also has a wave-proofing effect as a countermeasure against the vibration noise of the liquid inside. However, by extruding a molten thermoplastic resin through a die to form a parison,
(In the blow molding method, in which the open end of the parison is closed and air is blown immediately to form the parison into the desired hollow molded product, the parison extruded into the cavity is immediately closed, so the member that will become the partition plate is In order to insert it into the parison, special means are required.Also, it is possible to partially press it into a blow mold on the side of the parison to form a part that will become a partition plate inside the parison. However, although such a method is possible for plate-shaped hollow molded products, it is extremely difficult to mold hollow molded products with complicated shapes and a large blow-up ratio. Even if a hollow molded product is provided with a lip for reinforcement, it is not easy to provide a partition plate.

本発明は上記の点に鑑みて考えられたものであって、そ
の目的とするところは、従来から実施されているブロー
成形工程をそのｔ″＆にして、パリノン内部に仕切板を
一体に成形することができ、また内部に仕切板となる部
材があっても、その部材によってバリン／のエアブロー
が損われることがない新たな方法を提供することにある
。The present invention has been conceived in view of the above points, and its purpose is to improve the conventional blow molding process by molding a partition plate integrally inside the parinon. It is an object of the present invention to provide a new method in which air blowing of balin/gas is not impaired even if there is a member serving as a partition plate inside.

しかして、上記目的によるこの発明は、パリソンと、そ
のパリソンの内部にあって少なくとも一側端がパリソン
から離れたシートを同一のダイから押出成形又は射出成
形し、そのパリソンとシートとを一体に接合して、パリ
ソンをエアブローすることを特徴とするものである。Therefore, the present invention for the above purpose involves extrusion molding or injection molding a parison and a sheet inside the parison with at least one side end away from the parison from the same die, and integrally molding the parison and the sheet. This method is characterized by air blowing the parison after joining.

上記シートの押出成形又は射出成形は、従来から一般に
使用されているパリソン成形用ダイのコアーに、パリソ
ン成形用スリットとは別に、仕切板となるシートの成形
用スリットを設け、そのダイから溶融状態の熱可塑性樹
脂を押出し又は射出し、パリソンの成形に並行してシー
トをも押出又は射出することによる。In extrusion molding or injection molding of the above-mentioned sheet, a slit for molding the sheet that will become a partition plate is provided in the core of a conventionally commonly used parison molding die, in addition to the slit for parison molding, and the molten state is by extruding or injecting the thermoplastic resin and extruding or injecting the sheet in parallel with the molding of the parison.

この場合、シート成形用スリットは少なくとも一端をパ
リソン成形用スリットから離して設けることを必要とす
る。そのようにすれば押出成形又は射出成形されるパリ
ソンとシートとの間にエアーの流通間隙が得られ、シー
トが内部にあってもエアブローが損われずにパリソンの
膨張を行うことができる。またシート成形用スリットは
複数を交互に設けてもよく、方向も自由に選択でき、仕
切板の形状も可能な範囲で異形板をも採用し得る。In this case, the sheet-forming slit must have at least one end separated from the parison-forming slit. In this way, an air flow gap is obtained between the extrusion-molded or injection-molded parison and the sheet, and even if the sheet is inside, the parison can be expanded without impairing air blowing. Further, a plurality of slits for sheet forming may be provided alternately, the direction can be freely selected, and the shape of the partition plate may also be an irregularly shaped plate within a possible range.

上記ダイ−＼ラドから押出成形又は射出成形したパリソ
ンとシートは、エアブロ−前に一体に接合される。この
場合はブロー金型におけるピンチオフによって、パリソ
ン開口端を閉鎖すると同時に、パリソン端部とシート端
部とを接合することを通常とし、他にパリソン側に二次
的に形成されたリブ、ポスト等のコンブレツショ／によ
る場合も可能である。The parison and sheet extruded or injection molded from the die/rad are joined together before air blowing. In this case, the opening end of the parison is closed by pinch-off in a blow mold, and at the same time the end of the parison and the end of the sheet are joined together. It is also possible to use a combination of

更にこの発明を図示の例により詳説する。Further, the present invention will be explained in detail with reference to illustrated examples.

１は押出成形ダイで、パリソン成形用スリット２の内側
にあるコア３に両側端がパリソン成形用スリット２から
離れたシート成形用スリット４とエアピン５とが設けで
ある。Reference numeral 1 denotes an extrusion molding die, in which a core 3 located inside a parison-forming slit 2 is provided with a sheet-forming slit 4 and an air pin 5 whose opposite ends are separated from the parison-forming slit 2.

溶融状態の熱可塑性１封脂は、第２図に示すように、上
記両方のスリットから押出成形ダイｌの下方のブロー金
型６へと押出され、そこにパリソン７と、その両側端が
第３図に示す間隙８゜８髪隔ててパリソン内に位置する
シート９とが形成される。As shown in FIG. 2, the molten thermoplastic sealant 1 is extruded from both slits into the blow mold 6 below the extrusion molding die 1, where the parison 7 and its both ends are A sheet 9 located within the parison is formed with a gap of 8.8 hairs as shown in FIG.

パリソン７及びシート９の押出成形が完了したならば、
ブロー金型６を閉じて、バリソ／７の上部及び開口端７
ａをピンチオフして閉鎖すると同時に、パリソン端部と
シート９の端部９ａとを一体に接合する（第４図参照）
。Once the extrusion molding of parison 7 and sheet 9 is completed,
Close the blow mold 6 and remove the upper part and open end 7 of the burriso/7.
At the same time as pinching off and closing a, the parison end and the end 9a of the sheet 9 are joined together (see Figure 4).
.

次′にエアビン５を用いて、 内部に、パリソン６をブロー金型５のキャビティ一杯に
膨張させる（第５図参照）。この場合、シート９は第３
図にて明らかなように、両側端がパリソン７かも離れて
おり、そこにエアの流通間隙８，８．が形成されている
ので、パリソン内にブローされたエアは、シート９によ
り遮断されることなく全体に均等に及んで従来の場合と
何等変るところのない中空成形品１０を形成する。また
シート９はパリソン７と共に、上下端部がブロー金型６
に固定されているため、エアブロ一時に変形するような
ことがなく、押出成形されたときの形状を保つ°（、中
空成形品１０の内部の仕切板１１として残存する。そし
て仕切板は中空成形品１０の剛性を向上するのみならず
、防波板としての効果を呈することになる。Next, using the air bin 5, the parison 6 is inflated to fill the cavity of the blow mold 5 (see Fig. 5). In this case, sheet 9 is the third
As is clear from the figure, both ends are separated by the parison 7, and there are air circulation gaps 8, 8, . Because of this, the air blown into the parison is not blocked by the sheet 9 and evenly spreads throughout the parison, forming a hollow molded product 10 that is no different from the conventional case. In addition, the sheet 9, together with the parison 7, has upper and lower ends formed by the blow mold 6.
Because it is fixed to the air blower, it does not deform during air blowing and maintains its shape when extruded. This not only improves the rigidity of the product 10 but also functions as a wave-proof plate.

本発明は上述のように、バリソ／の押出成形と並行して
パリノン内部に７−トを押出成形し、このシートを仕切
板として中空成形品内に残存させるので、従来のブロー
成形法をそのまま用いることができる。またシートの一
側端と）（リソンとの間にエア流通間隙を形成したので
、仕切板によるエアの流通障害が起らず、エアブローを
通常の手段のもとに行なって、パリソン全体を所望の中
空成形品に成形することができる特長を有する。As described above, the present invention extrudes a 7-t sheet inside the parinon in parallel with the extrusion molding of the baliso sheet, and leaves this sheet as a partition plate in the hollow molded product, so the conventional blow molding method can be used as is. Can be used. In addition, since an air circulation gap is formed between one side edge of the sheet and the parison, there is no air circulation obstruction caused by the partition plate, and air blowing can be performed using normal means to blow the entire parison as desired. It has the advantage of being able to be molded into hollow molded products.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明に係る仕切板付中空成形品の製造方法を示
すもので、第１図はノクリソン成形用ダイの縦断正面図
、第２図は・（リソン及びシートの押出成形状態を示す
縦断側面図、第３図は第２図１−１線断面図、第４図は
ブロー金型を閉じたときの縦断側面図、第５図はエアブ
ロ一時の縦断側面図、第６図は製造された中空成形品の
一部を切除した斜視図である。 １・・・・・・押出成形用グイ ２・・・・・・パリソン成形用スリット３・・・・・・
コア ４・・・・・・シート成形用スリット ６・・・・・・ブロー金型 ７・・・・・・パリソン ８・・・・・・間隙 ９・・・・・・シート １０・・・・・・中空成形品The drawings show a method for manufacturing a hollow molded product with a partition plate according to the present invention, and FIG. 1 is a longitudinal sectional front view of a nocrison molding die, and FIG. , Figure 3 is a sectional view taken along the line 1-1 in Figure 2, Figure 4 is a vertical side view when the blow mold is closed, Figure 5 is a vertical side view during air blowing, and Figure 6 is a manufactured hollow. It is a perspective view with a part of the molded product cut away. 1... Gooey for extrusion molding 2... Slit for parison molding 3...
Core 4... Sheet molding slit 6... Blow mold 7... Parison 8... Gap 9... Sheet 10... ...Hollow molded product

Claims (1)

【特許請求の範囲】[Claims] ハ、　ＩＪソンと、そのパリソンの内部にあつ（／Ｉ＞
なくとも−側端が・（リン７から離れたシートを同一の
〉イから押出成形又は射出成形し、そのパリソンとシー
トと−を一体に接合してのち、エアブロ−を行なってパ
リノンを中空成形品は成形することを特徴とする仕切板
付中空成形品の製造方法。Ha, inside the IJ son and its parison (/I>
At least the side edge of the sheet is extrusion-molded or injection-molded from the same A, and the parison and the sheet are joined together, and then the parison is blow-molded by air blowing. A method for manufacturing a hollow molded product with a partition plate, characterized in that the product is molded.
JP56155371A 1981-09-30 1981-09-30 Molding method of hollow article with partition plate Granted JPS5856827A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56155371A JPS5856827A (en) 1981-09-30 1981-09-30 Molding method of hollow article with partition plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56155371A JPS5856827A (en) 1981-09-30 1981-09-30 Molding method of hollow article with partition plate

Publications (2)

Publication Number Publication Date
JPS5856827A true JPS5856827A (en) 1983-04-04
JPH0216209B2 JPH0216209B2 (en) 1990-04-16

Family

ID=15604462

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56155371A Granted JPS5856827A (en) 1981-09-30 1981-09-30 Molding method of hollow article with partition plate

Country Status (1)

Country Link
JP (1) JPS5856827A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62162517A (en) * 1986-01-14 1987-07-18 Toshio Takagi Molding method for hollow vessel provided with stay pillar
US4826517A (en) * 1988-04-29 1989-05-02 Bendix Electronics Limited Disposable air cleaner with one piece housing
WO2000076744A1 (en) * 1999-06-09 2000-12-21 Bernd Hansen Device for producing extrusion blow-molded containers with at least two chambers
JP2004098534A (en) * 2002-09-11 2004-04-02 Shirouma Science Co Ltd Method for blow molding container having two or more rooms and the container

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62162517A (en) * 1986-01-14 1987-07-18 Toshio Takagi Molding method for hollow vessel provided with stay pillar
US4826517A (en) * 1988-04-29 1989-05-02 Bendix Electronics Limited Disposable air cleaner with one piece housing
WO2000076744A1 (en) * 1999-06-09 2000-12-21 Bernd Hansen Device for producing extrusion blow-molded containers with at least two chambers
US6749796B1 (en) 1999-06-09 2004-06-15 Bernd Hansen Device for producing extrusion blow-molded containers with at least two chambers
JP2004098534A (en) * 2002-09-11 2004-04-02 Shirouma Science Co Ltd Method for blow molding container having two or more rooms and the container

Also Published As

Publication number Publication date
JPH0216209B2 (en) 1990-04-16

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