JPH04201430A - Method and apparatus for preparation of bottle made of synthetic resin - Google Patents
Method and apparatus for preparation of bottle made of synthetic resinInfo
- Publication number
- JPH04201430A JPH04201430A JP2334992A JP33499290A JPH04201430A JP H04201430 A JPH04201430 A JP H04201430A JP 2334992 A JP2334992 A JP 2334992A JP 33499290 A JP33499290 A JP 33499290A JP H04201430 A JPH04201430 A JP H04201430A
- Authority
- JP
- Japan
- Prior art keywords
- blow molding
- temp
- preform
- machine
- synthetic resin
- 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
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
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/68—Ovens specially adapted for heating preforms or parisons
-
- 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
- B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
-
- 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
- B29C49/06—Injection 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/68—Ovens specially adapted for heating preforms or parisons
- B29C49/682—Ovens specially adapted for heating preforms or parisons characterised by the path, e.g. sinusoidal path
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming 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、２軸延伸ブロー成形による合成樹脂製壜体の
製造方法および装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for producing a synthetic resin bottle by biaxial stretch blow molding.
合成樹脂製の大型の耐圧または耐熱増体は、そのほとん
どが飽和ポリエステル樹脂、特にポリエチレンテレフタ
レート樹脂（以下、単にＰＥＴと称する）の２軸延伸ブ
ロー成形方法により成形されている。Most of the large-sized pressure-resistant or heat-resistant extensions made of synthetic resin are molded by biaxial stretch blow molding of saturated polyester resin, particularly polyethylene terephthalate resin (hereinafter simply referred to as PET).
このＰＥＴ製壜体は、射出成形された有底円筒形のプリ
フォーム（１次成形品）を整列機で整列させて、加熱装
置へ順次搬送し、このプリフォームを延伸効果の出る温
度まで加熱した後、ブロー成形機において、２軸延伸ブ
ロー成形により成形されている。This PET bottle is made by arranging injection-molded bottomed cylindrical preforms (primary molded products) using an alignment machine and sequentially conveying them to a heating device, where the preforms are heated to a temperature that produces a stretching effect. After that, it is molded by biaxial stretch blow molding in a blow molding machine.
しかるに上記製造工程において、プリフォームが加熱装
置に入るまではプリフォームの温度コントロールが行な
われていないため、加熱装置で加熱されても、プリフォ
ームがブロー成形機に供給される時にはその温度にバラ
ツキがあり、その結果、成形が安定しないため成形能率
が悪く、かつ成形品の品質も安定しないという重大な問
題があった。However, in the above manufacturing process, the temperature of the preform is not controlled until it enters the heating device, so even if the preform is heated by the heating device, the temperature may vary when the preform is supplied to the blow molding machine. As a result, there was a serious problem that the molding was not stable, resulting in poor molding efficiency and the quality of the molded product was also unstable.
特にラインプリフォーム（射出成形されてそのまますぐ
に送られて来るプリフォームのことで、温度が高い）と
在庫プリフォーム（在庫品から送られて来るプリフォー
ムのことで、温度が低い）とを混ぜて供給する場合には
、プリフォームの温度のバラツキが顕著であった。In particular, line preforms (preforms that are sent immediately after injection molding, and the temperature is high) and stock preforms (preforms that are sent from stock and are low temperature). When mixed and supplied, the temperature of the preform varied significantly.
そこで本発明の合成樹脂製壜体の製造方法および装置は
、ブロー成形機に供給されるプリフォームの温度を均一
化し、２軸延伸ブロー成形の安定化を図ることを目的と
する。Therefore, the purpose of the method and apparatus for manufacturing a synthetic resin bottle of the present invention is to equalize the temperature of a preform supplied to a blow molding machine and to stabilize biaxial stretch blow molding.
上記目的を達成するために本発明の製造方法は、射出成
形されたプリフォームを２軸延伸ブロー成形により成形
して合成樹脂製壜体を製造するに当り、前記プリフォー
ムをブロー成形の前に予め所定の温度に保温してその温
度を均一化させることを特徴とする。In order to achieve the above object, the manufacturing method of the present invention is to manufacture a synthetic resin bottle by molding an injection-molded preform by biaxial stretch blow molding. It is characterized by keeping the temperature at a predetermined temperature in advance and making the temperature uniform.
また本発明の製造装置は、射出成形されたプリフォーム
を整列機で整列して順次ブロー成形機へ搬送し、該ブロ
ー成形機で、２軸延伸ブロー成形により成形して合成樹
脂製壜体を製造する装置において、前記整列機とブロー
成形機との間に、プリフォームを所定の温度に保温して
その温度を均一化させる保温装置を設けたことを特徴と
する。Further, in the manufacturing apparatus of the present invention, the injection-molded preforms are aligned in an alignment machine and sequentially conveyed to a blow molding machine, and the blow molding machine molds the preforms by biaxial stretch blow molding to form a synthetic resin bottle. The manufacturing apparatus is characterized in that a heat-retaining device is provided between the alignment machine and the blow-molding machine to keep the preform at a predetermined temperature to make the temperature uniform.
プリフォームはブロー成形機に入る前に保温されてその
温度を均一化されるので、２軸延伸ブロー成形が安定的
に円滑に行なわれ、かつ成形品の品質も安定する。Since the preform is kept warm and its temperature is made uniform before entering the blow molding machine, biaxial stretch blow molding can be performed stably and smoothly, and the quality of the molded product is also stable.
第１図は本発明を適用したＰＥＴ製壜体増体造工程の主
要部を示す簡略平面図、第２図は保温装置の断面図であ
る。FIG. 1 is a simplified plan view showing the main parts of the PET bottle bulk manufacturing process to which the present invention is applied, and FIG. 2 is a sectional view of a heat retaining device.
第１図において、１はプリフォーム１０の整列機、２は
保温炉、３はブロー成形機である。図示しない射出成形
機で射出成形されたプリフォーム１０は上記整列機１で
整列されて搬送路４を順次保温炉２に送られ、この保温
炉２を通過する間に、常温よりも高くブロー成形温度よ
りも低い所定の温度に一定化された後、ブロー成形機３
の直前に設けである加熱装置（図示せず）において延伸
効果の出る温度まで加熱され、次いでブロー成形機３に
おいて２軸延伸ブロー成形により最終製品である増体に
成形される。In FIG. 1, 1 is an alignment machine for preforms 10, 2 is an insulating furnace, and 3 is a blow molding machine. The preforms 10 injection-molded by an injection molding machine (not shown) are aligned by the alignment machine 1 and sent sequentially through the conveyance path 4 to the heat-retaining furnace 2. While passing through the heat-retaining furnace 2, the preforms 10 are blow-molded at a temperature higher than room temperature. After the temperature is stabilized at a predetermined temperature lower than the temperature, the blow molding machine 3
It is heated to a temperature at which a stretching effect is produced in a heating device (not shown) provided immediately before the process, and then formed into a final product by biaxial stretch blow molding in a blow molding machine 3.
上記保温炉２は、第２図に示したように炉体１２の内部
が、中央部に通風口２１を設けた仕切板１３により上室
１４と下室１５とに仕切られており、上室１４内ではプ
リフォーム１０が紙面前後方向に順次搬送される。即ち
、１６はプリフォーム１０の進行方向に並設された一対
のサイドガイド、１７はプリフォーム１０の口元部を両
側から挟んで搬送する搬送ベルトであって、プリフォー
ム１０はそのネックリング１１が、サイドガイド１６に
載置された状態で搬送ベルト１７に挟まれ、該サイドガ
イド１６に沿って移動する。As shown in FIG. 2, the heat retention furnace 2 has a furnace body 12 that is partitioned into an upper chamber 14 and a lower chamber 15 by a partition plate 13 having a ventilation hole 21 in the center. 14, the preforms 10 are sequentially conveyed in the front-rear direction of the paper. That is, 16 is a pair of side guides arranged in parallel in the traveling direction of the preform 10, 17 is a conveyor belt that pinches and conveys the mouth part of the preform 10 from both sides, and the preform 10 has a neck ring 11. , placed on the side guides 16, sandwiched between the conveyor belts 17, and moved along the side guides 16.
一方、下室１５内にはプリフォーム１０の進行方向に沿
って左右一対のヒータ１８および断面円弧状の遮熱板１
９が設けであるとともに、底壁中央部にはブロアー２０
が設置しである。On the other hand, inside the lower chamber 15, along the direction of movement of the preform 10, a pair of left and right heaters 18 and a heat shield plate 1 having an arcuate cross section are provided.
9 is provided, and a blower 20 is installed in the center of the bottom wall.
is installed.
従ってヒータ１８により温められた空気は、ブロアー２
０により通風口２１を通って上室１４に送られ、プリフ
ォーム１０の温度を設定温度まで上げる。そのため、プ
リフォーム１０はこの保温炉２を通過する間にその温度
のバラツキが矯正され均一化が図られる。Therefore, the air warmed by the heater 18 is transferred to the blower 2.
0 is sent to the upper chamber 14 through the ventilation hole 21, and the temperature of the preform 10 is raised to the set temperature. Therefore, while the preform 10 passes through the heat insulating furnace 2, the temperature variation is corrected and the temperature is made uniform.
上記ヒータ１８の温度やブロアー２０の風量は炉内の雰
囲気温度により調整することは勿論である。Of course, the temperature of the heater 18 and the air volume of the blower 20 are adjusted depending on the atmospheric temperature in the furnace.
なお、上記仕切板１３は、炉内上部からの落下物や埃か
らヒータ１８を保護するためのものである。Note that the partition plate 13 is for protecting the heater 18 from falling objects and dust from the upper part of the furnace.
〔発明の効果］
本発明によれば、以下のような効果を達成することがで
きる。[Effects of the Invention] According to the present invention, the following effects can be achieved.
（１）プリフォームはブロー成形機に入る前に常温以上
の温度に温められるので、成形能率が向上する。(1) Since the preform is heated to a temperature above room temperature before entering the blow molding machine, molding efficiency is improved.
（２）プリフォームはブロー成形機に入る前に保温装置
によりその温度が均一化されるので、２軸延伸ブロー成
形が安定的に円滑に行なわれて、成形能率が向上すると
ともに、成形品の品質も安定する。特にラインプリフォ
ームと在庫プリフォームとを混ぜてブロー成形機に供給
する場合に有効である。(2) Before the preform enters the blow molding machine, its temperature is equalized by a heat retention device, so biaxial stretch blow molding is performed stably and smoothly, improving molding efficiency and improving the quality of the molded product. The quality is also stable. This is particularly effective when mixing line preforms and stock preforms and supplying the mixture to a blow molding machine.
（３）射出成形時にプリフォームに発生して残っていた
残留応力が、保温装置を通過する間に除去、 される
。(3) Residual stress generated in the preform during injection molding is removed while passing through a heat insulating device.
図面は本発明の一実施例を示したもので、第１図は本発
明を適用したＰＥＴ製壜体増体造工程の主要部を示す簡
略平面図、第２図は保温装置の断面図である。
１・・・整列機、 ２・・・保温炉、３
・・・ブロー成形機、 ４・・・搬送路、１０・
・・プリフォーム、１７・・・搬送ヘルド、１８・・・
ヒータ、２０・・・ブロアー。
第２図
１−望ｉ’Ｉ械２−伴遥炉３−７゛ローム杉裸・４−−
−−皮ｉＬシト １０−一−プリ７オーム １
７−−−撮ｔべ２．ト旧−＝−７２０−−−プνアーThe drawings show one embodiment of the present invention, and Fig. 1 is a simplified plan view showing the main parts of the PET bottle bulk manufacturing process to which the present invention is applied, and Fig. 2 is a sectional view of a heat retention device. be. 1... Aligning machine, 2... Heat retention furnace, 3
... Blow molding machine, 4... Conveyance path, 10.
...Preform, 17...Transportation held, 18...
Heater, 20...Blower. Figure 2 1 - Hoi'I Machine 2 - Banharuka Furnace 3 - 7 Roam Cedar Bare 4 -
--Leather iL seat 10-1-puri 7 ohm 1
7---Photograph2. old-=-720--pu νa
Claims (2)
形により成形して合成樹脂製壜体を製造するに当り、前
記プリフォームをブロー成形の前に予め所定の温度に保
温してその温度を均一化させることを特徴とする合成樹
脂製壜体の製造方法。(1) When manufacturing a synthetic resin bottle by molding an injection-molded preform by biaxial stretch blow molding, the preform is kept at a predetermined temperature before blow molding. A method for producing a synthetic resin bottle characterized by uniformity.
順次ブロー成形機へ搬送し、該ブロー成形機で、２軸延
伸ブロー成形により成形して合成樹脂製壜体を製造する
装置において、前記整列機とブロー成形機との間に、プ
リフォームを所定の温度に保温してその温度を均一化さ
せる保温装置を設けたことを特徴とする合成樹脂製壜体
の製造装置。(2) In an apparatus for manufacturing a synthetic resin bottle by aligning injection molded preforms with an alignment machine and sequentially conveying them to a blow molding machine, and molding them by biaxial stretch blow molding in the blow molding machine, An apparatus for producing synthetic resin bottles, characterized in that a heat-retaining device is provided between the alignment machine and the blow-molding machine to keep the preform at a predetermined temperature and to make the temperature uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2334992A JP3062624B2 (en) | 1990-11-30 | 1990-11-30 | Method and apparatus for producing synthetic resin bottle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2334992A JP3062624B2 (en) | 1990-11-30 | 1990-11-30 | Method and apparatus for producing synthetic resin bottle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04201430A true JPH04201430A (en) | 1992-07-22 |
| JP3062624B2 JP3062624B2 (en) | 2000-07-12 |
Family
ID=18283520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2334992A Expired - Lifetime JP3062624B2 (en) | 1990-11-30 | 1990-11-30 | Method and apparatus for producing synthetic resin bottle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3062624B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2954920A1 (en) * | 2010-01-06 | 2011-07-08 | Sidel Participations | UNIT FOR PROCESSING HOLLOW BODY LAMPS, EQUIPPED WITH A CHAMBER FORMING A LIGHT TRAP |
| JP2020504044A (en) * | 2017-01-06 | 2020-02-06 | フレンドシップ・プロダクツ・エルエルシー | Molding system and related method |
-
1990
- 1990-11-30 JP JP2334992A patent/JP3062624B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2954920A1 (en) * | 2010-01-06 | 2011-07-08 | Sidel Participations | UNIT FOR PROCESSING HOLLOW BODY LAMPS, EQUIPPED WITH A CHAMBER FORMING A LIGHT TRAP |
| WO2011083263A1 (en) * | 2010-01-06 | 2011-07-14 | Sidel Participations | Unit for treating hollow body blanks, provided with a chamber forming a light trap |
| JP2020504044A (en) * | 2017-01-06 | 2020-02-06 | フレンドシップ・プロダクツ・エルエルシー | Molding system and related method |
| US11534953B2 (en) | 2017-01-06 | 2022-12-27 | Friendship Products Llc | Molding systems and related methods |
| US12263630B2 (en) | 2017-01-06 | 2025-04-01 | Friendship Products, Llc | Molding systems and related methods |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3062624B2 (en) | 2000-07-12 |
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