JP2006192908A - Blow molding method - Google Patents
Blow molding method Download PDFInfo
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- JP2006192908A JP2006192908A JP2006090013A JP2006090013A JP2006192908A JP 2006192908 A JP2006192908 A JP 2006192908A JP 2006090013 A JP2006090013 A JP 2006090013A JP 2006090013 A JP2006090013 A JP 2006090013A JP 2006192908 A JP2006192908 A JP 2006192908A
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- parison
- blow molding
- guide
- extruder head
- molding method
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- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
本発明は、カーブ形状を有するもののブロー成形方法に関する。 The present invention relates to a blow molding method having a curved shape.
従来の、カーブ形状を有するものをブロー成形する方法として、特許文献1に示すような金型或いは押出し機ヘッドを動かすブロー成形方法、またはエアでパリソンを吸引するブロー成形方法などがある。
しかし、従来のブロー成形方法では設備投資が高くつき、また動力費が嵩むので製造コストが高くなるという欠点があった。 However, the conventional blow molding method has the disadvantages that the capital investment is high and the power cost is high, resulting in high manufacturing costs.
解決しようとする課題は、従来のブロー成形方法では設備投資や動力費が嵩み製造コストが高くなるという点である。 The problem to be solved is that the conventional blow molding method increases capital investment and power cost and increases manufacturing cost.
本発明は、ブロー成形装置の押出し機ヘッドにカーブ形状を有するパリソンガイドを取り付け、該押出し機ヘッドから押出されたパリソンを該パリソンガイドに沿って導き、型締め前の該パリソンを所望のカーブ形状に賦形しながら垂下させることを最も主要な特徴とする。 The present invention attaches a parison guide having a curved shape to an extruder head of a blow molding apparatus, guides the parison extruded from the extruder head along the parison guide, and allows the parison before mold clamping to have a desired curved shape. The main feature is that it is drooped while shaping.
複雑なカーブ形状を有する中空品をブロー成形する場合でも、高価な設備投資を必要とせず、安価に、しかも余分なバリの発生を極力抑えた成形品を得ることができるという利点がある。
また、該パリソンガイドを形状記憶合金で構成すれば仮に該パリソンガイドが変形しても次の成形サイクル時には自動的に元の形状に復元し、何の支障もなく成形を続行することが出来ると言う利点がある。
Even when a hollow product having a complicated curve shape is blow-molded, there is an advantage that it is possible to obtain a molded product that does not require expensive capital investment, and that is inexpensive and suppresses generation of extra burrs as much as possible.
In addition, if the parison guide is made of a shape memory alloy, even if the parison guide is deformed, it is automatically restored to the original shape at the next molding cycle, and molding can be continued without any trouble. There is an advantage to say.
複雑なカーブ形状を有する中空品をブロー成形するという目的を、ブロー成形装置の押出し機ヘッドに所望のカーブ形状を有するパリソンガイドを取り付け、該押出し機ヘッドから押出されたパリソンを該パリソンガイドに沿って導き、型締め前の該パリソンを所望のカーブ形状に賦形しながら垂下させることにより、高価な設備投資を必要とせず、安価に、しかも余分なバリの発生を抑制したことで肉厚の均一性を損なわずに実現した。 For the purpose of blow molding a hollow product having a complicated curve shape, a parison guide having a desired curve shape is attached to the extruder head of the blow molding apparatus, and the parison extruded from the extruder head is moved along the parison guide. By leading the parison before mold clamping into a desired curve shape while hanging down, it is not necessary to invest in expensive equipment, and at the same time, the generation of extra burrs is suppressed at a low cost. Realized without loss of uniformity.
図1は、カーブ形状を有する中空品1の斜視図である。ブロー成形で該中空品1を作るに際し、肉厚を均一に保つためにバリの発生を極力抑えたい。 FIG. 1 is a perspective view of a hollow article 1 having a curved shape. When making the hollow product 1 by blow molding, it is desirable to suppress the generation of burrs as much as possible in order to keep the wall thickness uniform.
図2は本発明による1実施例を示しており、金属製のパリソンガイド3が図示しないブロー成形装置の押出し機ヘッド4のマンドレル5にネジ部6によって締結されている。7は緩み止め用のナットである。 FIG. 2 shows an embodiment according to the present invention, in which a metal parison guide 3 is fastened by a screw portion 6 to a mandrel 5 of an extruder head 4 of a blow molding apparatus (not shown). Reference numeral 7 denotes a locking nut.
次に本発明の作用を説明する。
先ず溶融樹脂からなるパリソン2が該押出し機ヘッド4から押出され、該パリソンガイド3に沿って所望の形状に曲がりながら垂下している。次に図の表裏の方向から図示しない分割金型が閉じ、該パリソン2の内部に図示しない下側の吹込み装置からエアを吹き込んで該中空品1の形状を賦形するが、この時該パリソン2は所望の形状に曲っているため、余分のバリを発生することが無い。
Next, the operation of the present invention will be described.
First, the parison 2 made of a molten resin is extruded from the extruder head 4 and hangs down along the parison guide 3 while being bent into a desired shape. Next, a split mold (not shown) is closed from the front and back of the figure, and air is blown into the inside of the parison 2 from a lower blowing device (not shown) to shape the shape of the hollow article 1. Since the parison 2 is bent into a desired shape, no extra burr is generated.
成形後、該中空品1を取り出す時は該パリソンガイド3に沿って該パリソン2を引抜けば良い。 When the hollow product 1 is taken out after molding, the parison 2 may be pulled out along the parison guide 3.
尚、該パリソンガイド3を形状記憶合金で構成すれば、該中空品1を取り出す際に無理な力が加わって該パリソンガイド3が変形しても、次の成形サイクル時の該パリソン2の再押出し及び再垂下により、再押出し直後の高温の該パリソン2の熱が該パリソンガイド3に伝わり、該形状記憶合金中に記憶された元の形状が呼び戻されて該パリソンガイド3は元の形状に復元する。 If the parison guide 3 is made of a shape memory alloy, even if an unreasonable force is applied when the hollow product 1 is taken out and the parison guide 3 is deformed, the parison guide 3 can be reassembled during the next molding cycle. The heat of the parison 2 at a high temperature immediately after the re-extrusion is transferred to the parison guide 3 by the extrusion and the re-sag, the original shape stored in the shape memory alloy is recalled, and the parison guide 3 is restored to the original shape. Restore.
該形状記憶合金に求められる性質としては該パリソン2を引抜く際に柔軟で変形し易いよう該形状記憶合金のマルテンサイト変態終了温度 Mf点が成形後の該中空品取り出し時のパリソン内空気温よりも高く、また再押出し直後の高温の該パリソン2の熱が該パリソンガイド3に伝わり、該形状記憶合金中に記憶された元の形状が呼び戻されて該パリソンガイド3が元の形状に復元するためにマルテンサイト逆変態終了温度 Af点がパリソン垂下時の該パリソン内空気温よりも低い必要があるが、このような要求を満たす合金としては原子比1:1のNi-Ti合金の元素Niを元素Pdで45モル%程度置換したものが知られており、そのMf、およびAfはそれぞれ約95℃、130℃程度であって前記の条件を充分満たすものである。 The shape memory alloy is required to have a martensite transformation end temperature M f point of the shape memory alloy when the parison 2 is pulled out so that the inside of the parison when the hollow article is taken out after molding is formed. The heat of the parison 2 which is higher than the temperature and immediately after the re-extrusion is transferred to the parison guide 3, the original shape stored in the shape memory alloy is recalled, and the parison guide 3 is restored to the original shape. In order to restore, the martensite reverse transformation end temperature Af point needs to be lower than the air temperature in the parison when the parison is drooping. An alloy satisfying such a requirement is a Ni-Ti alloy having an atomic ratio of 1: 1. The element Ni is replaced by about 45 mol% with the element Pd, and its M f and A f are about 95 ° C. and 130 ° C., respectively, and sufficiently satisfy the above conditions.
以上、本発明によれば複雑なカーブ形状を有する中空品をブロー成形する場合でも、高価な設備投資を必要とせず、安価に、しかもバリの発生を極力抑えた成形品を得ることができると言う効果が得られる。
また、該パリソンガイドを形状記憶合金で構成すれば仮に該パリソンガイドが変形しても次の成形サイクル時には自動的に元の形状に復元し、そのまま成形を続行することが出来ると言う利点がある。
As described above, according to the present invention, even when blow molding a hollow product having a complicated curve shape, it is possible to obtain a molded product that does not require expensive capital investment, and that is inexpensive and suppresses the generation of burrs as much as possible. The effect to say is acquired.
Further, if the parison guide is made of a shape memory alloy, there is an advantage that even if the parison guide is deformed, it is automatically restored to the original shape at the next molding cycle, and the molding can be continued as it is. .
本発明は、ブロー成形法一般に広く利用可能である。 The present invention is widely applicable to general blow molding methods.
1 中空品
2 パリソン
3 パリソンガイド
4 押出し機ヘッド
5 マンドレル
6 ネジ部
7 緩み止め用のナット
DESCRIPTION OF SYMBOLS 1 Hollow product 2 Parison 3 Parison guide 4 Extruder head 5 Mandrel 6 Screw part 7 Nut for prevention of loosening
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2006090013A JP4792315B2 (en) | 2006-03-29 | 2006-03-29 | Blow molding method |
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JP2006090013A JP4792315B2 (en) | 2006-03-29 | 2006-03-29 | Blow molding method |
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JP2006192908A true JP2006192908A (en) | 2006-07-27 |
JP2006192908A5 JP2006192908A5 (en) | 2006-09-07 |
JP4792315B2 JP4792315B2 (en) | 2011-10-12 |
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ID=36799325
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JP2006090013A Expired - Fee Related JP4792315B2 (en) | 2006-03-29 | 2006-03-29 | Blow molding method |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112895399A (en) * | 2021-01-17 | 2021-06-04 | 程瑾 | All-in-one is carried in processing of PP plastic bottle |
Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5692026A (en) * | 1979-12-25 | 1981-07-25 | Inoue Mtp Co Ltd | Method and apparatus for blow-molding hollow product |
JPS6241516U (en) * | 1985-08-29 | 1987-03-12 | ||
JPS635925A (en) * | 1986-06-27 | 1988-01-11 | Tokai Rubber Ind Ltd | Mandrel for forming bent hose |
JPS63280613A (en) * | 1987-05-12 | 1988-11-17 | Purakoo:Kk | Blow molding method and device |
JPH01145108A (en) * | 1987-11-30 | 1989-06-07 | Toto Ltd | Molding device for bent pipe |
JPH03240516A (en) * | 1990-02-19 | 1991-10-25 | Japan Steel Works Ltd:The | Method and apparatus for blow-molding |
JPH03275338A (en) * | 1990-03-26 | 1991-12-06 | Calsonic Corp | Manufacture of rubber bend hose |
JPH04296527A (en) * | 1991-03-26 | 1992-10-20 | Ube Ind Ltd | Method and device for blow molding |
JPH04371825A (en) * | 1991-06-21 | 1992-12-24 | Japan Steel Works Ltd:The | Blow molding |
JPH04371824A (en) * | 1991-06-21 | 1992-12-24 | Japan Steel Works Ltd:The | Blow molding method and device |
JPH05200841A (en) * | 1992-01-28 | 1993-08-10 | Japan Steel Works Ltd:The | Blow molding method and apparatus |
JPH05338014A (en) * | 1992-06-10 | 1993-12-21 | Japan Steel Works Ltd:The | Method and apparatus for blow molding |
JPH06126812A (en) * | 1992-10-16 | 1994-05-10 | Japan Steel Works Ltd:The | Blow molding method and device |
JPH0768628A (en) * | 1993-09-03 | 1995-03-14 | Japan Steel Works Ltd:The | Method and apparatus for blow molding |
JPH07256648A (en) * | 1994-03-17 | 1995-10-09 | Toyoda Gosei Co Ltd | Production of bent hose |
JPH07314537A (en) * | 1994-05-23 | 1995-12-05 | Japan Steel Works Ltd:The | Method and machine for blow-molding |
-
2006
- 2006-03-29 JP JP2006090013A patent/JP4792315B2/en not_active Expired - Fee Related
Patent Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5692026A (en) * | 1979-12-25 | 1981-07-25 | Inoue Mtp Co Ltd | Method and apparatus for blow-molding hollow product |
JPS6241516U (en) * | 1985-08-29 | 1987-03-12 | ||
JPS635925A (en) * | 1986-06-27 | 1988-01-11 | Tokai Rubber Ind Ltd | Mandrel for forming bent hose |
JPS63280613A (en) * | 1987-05-12 | 1988-11-17 | Purakoo:Kk | Blow molding method and device |
JPH01145108A (en) * | 1987-11-30 | 1989-06-07 | Toto Ltd | Molding device for bent pipe |
JPH03240516A (en) * | 1990-02-19 | 1991-10-25 | Japan Steel Works Ltd:The | Method and apparatus for blow-molding |
JPH03275338A (en) * | 1990-03-26 | 1991-12-06 | Calsonic Corp | Manufacture of rubber bend hose |
JPH04296527A (en) * | 1991-03-26 | 1992-10-20 | Ube Ind Ltd | Method and device for blow molding |
JPH04371825A (en) * | 1991-06-21 | 1992-12-24 | Japan Steel Works Ltd:The | Blow molding |
JPH04371824A (en) * | 1991-06-21 | 1992-12-24 | Japan Steel Works Ltd:The | Blow molding method and device |
JPH05200841A (en) * | 1992-01-28 | 1993-08-10 | Japan Steel Works Ltd:The | Blow molding method and apparatus |
JPH05338014A (en) * | 1992-06-10 | 1993-12-21 | Japan Steel Works Ltd:The | Method and apparatus for blow molding |
JPH06126812A (en) * | 1992-10-16 | 1994-05-10 | Japan Steel Works Ltd:The | Blow molding method and device |
JPH0768628A (en) * | 1993-09-03 | 1995-03-14 | Japan Steel Works Ltd:The | Method and apparatus for blow molding |
JPH07256648A (en) * | 1994-03-17 | 1995-10-09 | Toyoda Gosei Co Ltd | Production of bent hose |
JPH07314537A (en) * | 1994-05-23 | 1995-12-05 | Japan Steel Works Ltd:The | Method and machine for blow-molding |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112895399A (en) * | 2021-01-17 | 2021-06-04 | 程瑾 | All-in-one is carried in processing of PP plastic bottle |
Also Published As
Publication number | Publication date |
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JP4792315B2 (en) | 2011-10-12 |
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