JPH0216209B2 - - Google Patents
Info
- Publication number
- JPH0216209B2 JPH0216209B2 JP56155371A JP15537181A JPH0216209B2 JP H0216209 B2 JPH0216209 B2 JP H0216209B2 JP 56155371 A JP56155371 A JP 56155371A JP 15537181 A JP15537181 A JP 15537181A JP H0216209 B2 JPH0216209 B2 JP H0216209B2
- Authority
- JP
- Japan
- Prior art keywords
- parison
- sheet
- hollow molded
- molded product
- partition plate
- 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
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
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
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の製造方法に関する
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、剛性の向上のみならず、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、そのパリソンの開口
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、キヤビテイ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。またパリソンの側部を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つても、
複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ブは設けられ
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 vibration noise of the liquid inside. However, in the blow molding method, a molten thermoplastic resin is extruded through a die to form a parison, the open end of the parison is closed, and air blowing is immediately performed to form the parison into a desired hollow molded product. Since the parison is immediately closed, special means are required to insert the partition into the parison. It is also possible to partially push the sides of the parison into a blow mold to form a part that will become a partition plate inside the parison, but such a method is not suitable for plate-shaped hollow molded products. Even if it is possible,
It is extremely difficult to mold a hollow molded product with a complex shape and a large blow-up ratio, and after all, even if a blow molded hollow molded product is provided with reinforcing ribs, it is easy to provide partition plates. isn't it.
本発明は上記の点に鑑みて考えられたものであ
つて、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ままにして、パリ
ソ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つても、その部
材によつてパリソ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 form a partition plate integrally inside the parison without changing the conventional blow molding process. I can,
Another object of the present invention is to provide a new method in which even if there is a member serving as a partition plate inside, the air blowing of the parison is not impaired by the member.
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つて少なくとも一
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 extruding 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ツトとは別に、仕切
板となるシートの成形用スリツトを設け、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, which will become a partition plate, is provided in the core of a conventionally commonly used parison molding die, in addition to the slit for molding the parison, 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、シート成形用スリツトは少なくとも
一端をパリソン成形用スリツ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、シートが内部にあつても
エアブローが損われずにパリソンの膨脹を行うこ
とができる。またシート成形用スリツトは複数を
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 forming the sheet may be provided alternately, the direction can be freely selected, and the shape of the partition plate may also be an oddly shaped plate within a possible range.
上記ダイヘツドから押出成形又は射出成形した
パリソンとシートは、エアブロー前に一体に接合
される。この場合はブロー金型におけるピンチオ
フによつて、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、ポスト等のコンプレツシヨンによる場合
も可能である。 The parison and sheet extruded or injection molded from the die head 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.In addition, ribs secondarily formed on the parison side, It is also possible to use compression such as a post.
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ツト
２の内側にあるコア３に両側端がパリソン成形用
スリツト２から離れたシート成形用スリツト４と
エアピン５とが設けてある。 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樹脂は、第２図に示すよう
に、上記両方のスリツトから押出成形ダイ１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を隔
ててパリソン内に位置するシート９とが形成され
る。 The thermoplastic resin in the molten state is extruded from both slits into the blow mold 6 below the extrusion molding die 1, as shown in FIG. A sheet 9 located within the parison is formed with a gap 8, 8 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、パリソン７の上
部及び開口端７ａ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）。 When extrusion molding of the parison 7 and the sheet 9 is completed, the blow mold 6 is closed, and the upper part and the open end 7a of the parison 7 are pinched off and closed, and at the same time, the end of the parison and the end 9a of the sheet 9 are closed. Join them together (see Figure 4).
次にエアピン５を用いて、
内部に、パリソン６をブロー金型５のキヤビテ
イ一杯に膨脹させる（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から離れており、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、エアブロー時に変形
するようなことがなく、押出成形されたときの形
状を保つて、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 pin 5, the parison 6 is inflated to the full extent of the cavity of the blow mold 5 (see FIG. 5). in this case,
As is clear from FIG. 3, both ends of the sheet 9 are separated from the parison 7, and air circulation gaps 8, 8 are formed there, so that the air blown into the parison is transferred to the sheet 9. To form a hollow molded product 10 that is uniformly distributed over the whole without being interrupted by the hollow molded product 10 and is no different from the conventional case. In addition, since the upper and lower ends of the sheet 9 are fixed to the blow mold 6 together with the parison 7, the sheet 9 does not deform during air blowing and maintains its shape when extruded, thereby preventing the inside of the hollow molded product 10 from being deformed during air blowing. Partition plate 11
remains as. And the partition plate is a hollow molded product 10
This not only improves the rigidity of the structure, but also acts as a wave-break plate.
本発明は上述のように、パリソンの押出成形と
並行してパリソン内部にシートを押出成形し、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パリソンとの
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
段のもとに行なつて、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, in the present invention, a sheet is extruded inside the parison in parallel with the extrusion molding of the parison, and this sheet is left inside the hollow molded product as a partition plate, so the conventional blow molding method can be used as is. can. In addition, since an air circulation gap is formed between one side edge of the sheet and the parison, air circulation is not obstructed by the partition plate, and air blowing can be performed using normal means to blow the entire parison to the desired size. It has the feature of being able to be molded into hollow molded products.
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図はパリソン成形用ダイ
の縦断正面図、第２図はパ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
−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図はエアブロー時の縦断側面
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……押出成形用ダイ、２……パリソン成形用
スリツト、３……コア、４……シート成形用スリ
ツト、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 die for forming a parison, FIG. 2 is a longitudinal sectional side view showing the state of extrusion molding of a parison and a sheet, and Figure 3 is a cross-sectional view taken along the line shown 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 one of the manufactured hollow molded products. It is a perspective view with a section cut away. DESCRIPTION OF SYMBOLS 1...Die for extrusion molding, 2...Slit for parison forming, 3...Core, 4...Slit for sheet forming, 6...Blow mold, 7...Parison, 8...
... Gap, 9... Sheet, 10... Hollow molded product.
Claims (1)
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のち、エアブロ
ーを行なつてパリソンを中空成形品に成形するこ
とを特徴とする仕切板付中空成形品の製造方法。1. A parison and a sheet inside the parison with at least one side edge away from the parison are extruded or injection molded from the same die, and after the parison and sheet are joined together, air blowing is performed. A method for manufacturing a hollow molded product with a partition plate, characterized in that a parison is formed into a hollow molded product by using the same method.
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 JPS5856827A (en) | 1983-04-04 |
| JPH0216209B2 true 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) |
Families Citing this family (4)
| 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 |
| DE19926329A1 (en) * | 1999-06-09 | 2000-12-21 | Bernd Hansen | Method for manufacturing containers and device for carrying out the method |
| JP2004098534A (en) * | 2002-09-11 | 2004-04-02 | Shirouma Science Co Ltd | Multi-chamber container blow molding method and container |
-
1981
- 1981-09-30 JP JP56155371A patent/JPS5856827A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5856827A (en) | 1983-04-04 |
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