JPH059261B2 - - Google Patents
Info
- Publication number
- JPH059261B2 JPH059261B2 JP62005883A JP588387A JPH059261B2 JP H059261 B2 JPH059261 B2 JP H059261B2 JP 62005883 A JP62005883 A JP 62005883A JP 588387 A JP588387 A JP 588387A JP H059261 B2 JPH059261 B2 JP H059261B2
- Authority
- JP
- Japan
- Prior art keywords
- neck
- mouth
- heating
- infrared
- workpiece
- 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 - Fee Related
Links
- 238000010438 heat treatment Methods 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 11
- 229920000728 polyester Polymers 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000002425 crystallisation Methods 0.000 description 10
- 230000008025 crystallization Effects 0.000 description 9
- 238000001816 cooling Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 4
- 238000000071 blow moulding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000013021 overheating Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
- B29C49/6409—Thermal conditioning of preforms
- B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
- B29C49/6445—Thermal conditioning of preforms characterised by temperature differential through the preform length
- B29C49/6452—Thermal conditioning of preforms characterised by temperature differential through the preform length by heating the neck
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は飽和ポリエステルびんの製造方法に
係り、特にポリエチレンテレフタレート等の飽和
ポリエステルによりなるびん等のキヤツプで封緘
されるべき口頸部を結晶化する方法に関するもの
である。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method for manufacturing saturated polyester bottles, and in particular, to crystallization of the mouth and neck part of the bottle, which is to be sealed with a cap made of saturated polyester such as polyethylene terephthalate. It's about how to do it.
（従来の技術）
上記この種のびんは通常射出成形時により形成
された無定形組織の有底パリソンを、口頸部とな
るべき部分を残して、二軸延伸吹込成形すること
によつて製造される。従つて、肩部、胴部および
底部が分子配向されているため、この種のびん
は、透明性、ガスバリヤー性、強度、耐衝撃性等
の容器特性にすぐれていて、これらの部分をヒー
トセツトしたびんは、ジュース類等を熱間充填し
たとき、これらの部分は収縮による変形が起こり
難いという利点をもつ。(Prior art) This type of bottle is usually manufactured by biaxially stretching blow molding a bottomed parison of an amorphous structure formed by injection molding, leaving the part that will become the mouth and neck part. be done. Therefore, because the shoulders, body, and bottom are molecularly oriented, this type of bottle has excellent container properties such as transparency, gas barrier properties, strength, and impact resistance, and these parts can be heat set. Water bottles have the advantage that these parts are less likely to be deformed due to shrinkage when hot filled with juice or the like.
しかし口頸部は無定形組織のままであるので、
比較的軟らかく、そのため封緘前の取扱い中に端
面に異物があたり傷がついたり、あるいは熱間充
填の際に口頸部全体やねじ部、ネツクリング部な
どが変形して密封性が損なわれやすい。 However, since the mouth and neck remain amorphous tissue,
Because it is relatively soft, the end surface is easily damaged by foreign objects during handling before sealing, or the entire mouth and neck, threaded portion, neck ring portion, etc. are deformed during hot filling, resulting in loss of sealing performance.
この欠点を解消するために、変形し易い無定形
の口頸部を加熱して結晶化することにより口頸部
の硬度や耐熱性を向上させる技術も例えば特開昭
59−201824号に示すように、既に公知であるが、
この場合に結晶化に伴い密度が増加して体積が減
少し、その際口頸部が不規則に変形して、キヤツ
プの打栓が困難となり、或いは密封性の低下を生
じ易い。 In order to overcome this drawback, a technology has been developed to improve the hardness and heat resistance of the mouth and neck by heating and crystallizing the easily deformable amorphous mouth and neck.
As shown in No. 59-201824, it is already known,
In this case, the density increases and the volume decreases as a result of crystallization, and at this time, the mouth and neck area deforms irregularly, making it difficult to plug the cap or easily causing a decrease in sealing performance.
（発明が解決しようとする問題点）
本出願人は上記の点を解決するため、耐熱性樹
脂よりなるコアを口頸部内に挿入し、口頸部内周
面にコア外周面を軸係合させ、口頸部の内周面が
コアで規制された状態で、口頸部を熱処理し、結
晶化させる方法を案出すると共に、特に結晶化後
のコアの抜出しを容易にした装置も発明した。(Problems to be Solved by the Invention) In order to solve the above-mentioned problems, the applicant inserts a core made of heat-resistant resin into the mouth and neck, and axially engages the outer peripheral surface of the core with the inner peripheral surface of the mouth and neck. In addition to devising a method for heat-treating and crystallizing the mouth and neck while the inner peripheral surface of the mouth and neck is regulated by the core, we also developed a device that makes it especially easy to extract the core after crystallization. Invented it.
これらの結晶化方法も装置もきわめて有効にキ
ヤツプで封緘されるべき口頸部を結晶化すること
ができるものであるが、プリフオーム（ポリエス
テルテレフタレート等の飽和ポリエステル樹脂か
ら成るパリソン）を軸方向に延伸し、且つ金型内
で流体により周方向に膨張させることによつて得
られるプラスチツクびんに対して、無定形組織の
ままである口頸部を加熱して結晶化を行う関係
上、口頸部に設けたねじ、ネツクリング等の段差
部を有し、従来の加熱方法では均一な結晶化が行
なわれない場合があり、迅速な作業の遂行上若干
の問題点を有している。 These crystallization methods and devices are extremely effective in crystallizing the mouth and neck area to be sealed with a cap, but they are difficult to achieve by stretching a preform (a parison made of a saturated polyester resin such as polyester terephthalate) in the axial direction. However, in contrast to plastic bottles obtained by expanding circumferentially with fluid in a mold, the mouth and neck, which remains an amorphous tissue, is heated and crystallized. Conventional heating methods may not result in uniform crystallization, which poses some problems in terms of speedy work.
この発明は上記不具合を解消することをその目
的とする。 An object of the present invention is to solve the above-mentioned problems.
（問題点を解決するための手段及び作用）
この発明は上記問題点に鑑みなされたものであ
つて、延伸成形前のプリフオームの口頸部を近赤
外線加熱装置により加熱結晶化し、しかる後に延
伸ブロー成形によりびんを製造するようにしたも
ので、近赤外線加熱装置を用いたことにより口頸
部の内外面が他の加熱装置に比べて均一に加熱で
きると共に、次のブロー成形工程のボトル成形が
容易となり、高品質のものが生産される。(Means and effects for solving the problems) The present invention has been made in view of the above problems, and involves heating and crystallizing the mouth and neck of the preform before stretch-molding with a near-infrared heating device, and then stretch-blowing. The bottle is manufactured by molding, and by using a near-infrared heating device, the inner and outer surfaces of the mouth and neck can be heated more uniformly than other heating devices, and the bottle can be formed easily in the next blow molding process. It is easy to produce high quality products.
またびんの口頸部に設けたねじ、ネツクリング
等の段差部を有する口頸部全体に均一な結晶化が
迅速且つ容易に得られると共に、透明性、ガスバ
リヤー性、強度、耐衝撃性等の容器特性に優れ、
熱間充填によつても変形の生じないすぐれた容器
を提供できる。 In addition, uniform crystallization can be quickly and easily obtained over the entire neck of the bottle, which has stepped parts such as screws and neck rings. Excellent container properties,
It is possible to provide an excellent container that does not undergo deformation even during hot filling.
（実施例）
以下図面に基づいてこの発明の実施例を説明す
る。(Example) Examples of the present invention will be described below based on the drawings.
第１図はこの発明の方法を実施する装置の概略
図であつて、全体図が長くなるので、Ａ〜Ａ線に
おいて第１図ａと第１図ｂとに分割して描いてあ
る。 FIG. 1 is a schematic diagram of an apparatus for carrying out the method of the present invention, and since the overall view is long, it is divided into FIG. 1a and FIG. 1b along line A to A.
図において、ポリエチレンテレフタレートから
成る射出成形されたプリフオーム（ワーク）Ｗは
Ｘで示したように入口シユート１より順次進入し
て、回転する挿入ホイール２および同じく回転す
る挿入ホイール３のポケツト内につぎつぎに移行
されて、Ｙのところで搬送ユニツトのコンベア状
搬送通路４内にと移送される。 In the figure, an injection-molded preform (workpiece) W made of polyethylene terephthalate enters sequentially from an inlet chute 1 as indicated by X, and is successively inserted into the pockets of a rotating insertion wheel 2 and a rotating insertion wheel 3. It is then transferred at Y into the conveyor-like transport path 4 of the transport unit.
搬送ユニツトは駆動部５、従動部６、中間部７
より形成されていて、駆動部５の駆動スプロケツ
トと従動部６の２個の従動輪６1，６2との間にチ
エーンが張設されている。 The transport unit includes a driving section 5, a driven section 6, and an intermediate section 7.
A chain is stretched between the drive sprocket of the drive section 5 and the two driven wheels 6 1 and 6 2 of the driven section 6.
９は近赤外線を用いた加熱装置であつて、図の
ように複数個の加熱装置９1，９2，……，９oが
搬送通路４に沿つて当該搬送ユニツトの周囲に複
数個並べて設けてある。 9 is a heating device using near-infrared rays, and as shown in the figure, a plurality of heating devices 9 1 , 9 2 , . There is.
なお上記近赤外線は６〜15μ、特に７〜9μの波
長のものを用いるのがよい。 It is preferable to use the near infrared rays having a wavelength of 6 to 15 microns, particularly 7 to 9 microns.
１０は搬出入用回転ホイール、１１，１２，１
３はいずれも排出用の回転ホイール、１４1およ
び１４2はささえ、１５は排出口を示す。 10 is a rotating wheel for loading and unloading, 11, 12, 1
3 is a rotating wheel for discharge, 14 1 and 14 2 are supports, and 15 is a discharge port.
また１６は加熱装置９のヒータの過熱を防止す
るためのフアン、１７はクーリング装置１９1，
１９2の冷却に用いるフアンであり、１８はテン
シヨンユニツトである。 Further, 16 is a fan for preventing the heater of the heating device 9 from overheating, 17 is a cooling device 19 1 ,
19 is a fan used for cooling 2 , and 18 is a tension unit.
いまＹの個所で搬入ホイール３から搬送通路４
内に導かれたワークＷは自転しながら搬送通路４
上を矢印方向に送られ、その間に通路４に沿つて
配設された近赤外線加熱装置９1，９2，……，９
ｏによつてその口頸部が加熱される。 Now at point Y, move from carry-in wheel 3 to conveyance path 4.
The workpiece W guided inside rotates on its own axis while moving along the conveyance path 4.
Near-infrared heating devices 9 1 , 9 2 , .
o causes its mouth and neck to heat up.
このようにして搬送ユニツトの通路内にワーク
Ｗを自転し乍ら進行させてその周辺に設けた近赤
外線加熱装置によつて十分にヒート処理してＺの
個所までワークは進み、ついでクーリング装置１
９1と１９2によつてフアン１７から送られる空気
によつて冷却成形され、しかる後に搬出入ホイー
ル１０のポケツト内に入り、ホイール１０の回転
につれ逐次搬出ホイール１１，１２，１３を経て
１５の排出口より排出され次工程に向かう。 In this way, the workpiece W is rotated and advanced in the passage of the transport unit, and the workpiece is sufficiently heated by the near-infrared heating device installed around it, and then advances to the point Z, and then the workpiece is transferred to the cooling device 1
It is cooled and molded by the air sent from the fan 17 by 9 1 and 19 2 , and then enters the pocket of the carry-in/out wheel 10, and as the wheel 10 rotates, it passes through the carry-out wheels 11, 12, 13 one by one, and then the It is discharged from the discharge port and goes to the next process.
なおＰ，Ｑはそれぞれコアの打込み位置とノツ
クアウト位置を示し、Ｐの位置で冷却されたワー
クの口頸部に内径規制用コアを打込み、上記口頸
部の内部を冷却して熱収縮させて上方に引上げ、
しかるのちリミツトスイツチとカム装置により一
定のタイミングをとつて空気を送つてノツクアウ
トシリンダを作動させて、Ｑの位置で上記ワーク
Ｗをつき落とすようになつている。 Note that P and Q indicate the core driving position and knock-out position, respectively, and the inner diameter regulating core is driven into the mouth and neck of the cooled workpiece at position P, and the inside of the mouth and neck is cooled and heat-shrinked. pull upwards,
Thereafter, a limit switch and a cam device send air at a certain timing to operate the knock-out cylinder, thereby knocking down the workpiece W at position Q.
第２図はこの発明の実施例の特徴とするワーク
に対し近赤外線加熱を行なう加熱ヒータ装置の構
成を示したもので、９ａと９ｂとは平行に置かれ
たヒータであつて、このヒータの加熱を防ぐ意味
においてヒータ取付部材にフアン１６からの風を
導入する冷却空気の通路２０1，２０2と冷却水を
導く通路２０3が設けられていて、通路２０1と２
０2は吐出口２１1と２１2を介して冷却空気をヒ
ータ９ａと９ｂとに導く。 FIG. 2 shows the configuration of a heater device that performs near-infrared heating on a workpiece, which is a feature of the embodiment of the present invention, and 9a and 9b are heaters placed in parallel. In order to prevent heating, the heater mounting member is provided with cooling air passages 20 1 and 20 2 that introduce wind from the fan 16 and a passage 20 3 that introduces cooling water.
0 2 guides cooling air to heaters 9a and 9b via discharge ports 21 1 and 21 2 .
このようにして冷却水と冷却空気によつてヒー
タ９ａと９ｂの温度の過熱を防ぐと共に、吐出口
２１1，２１2とから出た熱風を利用してワークＷ
のヒート処理を一層有効なものとしている。 In this way, the cooling water and cooling air prevent the heaters 9a and 9b from overheating, and the hot air from the discharge ports 21 1 and 21 2 is used to prevent the workpiece
This makes the heat treatment even more effective.
またヒータ９ａと９ｂは調節ねじ２２と２３と
によりそれぞれワークＷに対して上下及び前後方
向の調整を行うことができる。 Further, the heaters 9a and 9b can be adjusted vertically and longitudinally with respect to the workpiece W using adjustment screws 22 and 23, respectively.
また２４はワークＷの近辺に設けた反射板又は
加熱処理を効率よく行うようにしたもので、また
遮蔽板２５を設けたことによつてワークＷのホル
ダＨの温度上昇（ホルダＨの過熱）を防止した。 Reference numeral 24 denotes a reflector plate provided near the workpiece W to efficiently perform heat treatment, and a shielding plate 25 is provided to prevent the temperature of the holder H of the workpiece W from increasing (overheating of the holder H). was prevented.
なおホルダＨの温度は通常60〜80℃で、それ以
上温度が上昇すると、ワークＷの胴部の温度が上
昇し、軟化と変形を引き起こすので、ホルダＨの
温度コントロールが必要となり、上述のようにヒ
ータからの遮蔽とさらに別のフアンを用いて冷却
を行つている。 Note that the temperature of the holder H is normally 60 to 80°C, and if the temperature rises above that, the temperature of the body of the workpiece W will rise, causing softening and deformation, so the temperature of the holder H must be controlled, as described above. In addition, cooling is performed using shielding from the heater and a separate fan.
このように近赤外線を用いた加熱装置の熱の完
全利用をはかり熱を効果的にプラスチツク材であ
るワークに浸透させ、迅速に結晶化を行うことが
できる。 In this way, by fully utilizing the heat of the heating device that uses near-infrared rays, it is possible to effectively penetrate the heat into the plastic workpiece and quickly crystallize it.
第３図はこの発明の近赤外線加熱装置によつて
プリフオームの口頸部を加熱結晶化する場合と、
熱風加熱装置及びマイクロ波加熱装置を用いて加
熱結晶化する場合の口頸部結晶化度を、ねじ山の
長手方向にＡ，Ｂ，Ｃ，Ｄの４つの個所について
それぞれ内側、外側に別けて示したものである。 FIG. 3 shows a case where the mouth and neck of the preform are heated and crystallized using the near-infrared heating device of the present invention;
The degree of crystallinity of the mouth and neck area in the case of heating crystallization using a hot air heating device and a microwave heating device was determined by dividing the crystallinity of the mouth and neck into the inside and outside at four points A, B, C, and D in the longitudinal direction of the thread. This is what is shown.
加熱条件としては熱風の場合2Kw／200Vの規
格で90V、90秒間、風量50／minとし、近赤外
線の場合1KW／200Vの規格で140V、90秒間、マ
イクロ波の場合出力900V、11秒間を用いた。 The heating conditions for hot air are 90V for 90 seconds and air flow rate 50/min for hot air, 140V for 90 seconds for near-infrared rays, and 900V output for 11 seconds for microwaves. there was.
第３図はねじ山外側を結晶化度が42〜43％とな
るような条件で設定して行なつたものであるが、
この試験結果で明らかのように熱風の場合は内外
の差が大きく、近赤外線の場合は内外ともいずれ
もほぼ均一であり、マイクロ波の場合には長手方
向に不均一性があり近赤外線のものに比べてバラ
ツキが大きい。 In Figure 3, the test was carried out under conditions such that the crystallinity of the outside of the thread was 42-43%.
As is clear from this test result, in the case of hot air, there is a large difference between the inside and outside, in the case of near-infrared rays, both the inside and outside are almost uniform, and in the case of microwaves, there is non-uniformity in the longitudinal direction; The variation is large compared to .
また85°充填してキヤツプシールをし、キヤツ
ピング条件としてトツププレツシヤー200Kg、サ
イドプレツシヤー20Kgとしてキヤツプシール時の
ねじの変形を検査した結果、熱風の場合はまき締
めの際につば折れを生じ、マイクロ波の場合には
つば部が変形した。 In addition, we filled the cap at an 85° angle, sealed it, and tested the screws for deformation during cap sealing with a top pressure of 200 kg and a side pressure of 20 kg as the capping conditions. In the case of microwaves, the brim was deformed.
これに対し近赤外線加熱を用いたこの発明のも
のでは全く変形がみられなかった。 On the other hand, no deformation was observed in the product of the present invention using near-infrared heating.
このように延伸成形前のプリフオームの口頸部
を近赤外線加熱装置を用いて加熱結晶化させたこ
とにより、従来の遠赤外線、熱風、誘導加熱等の
加熱方法によるものに比べて、加熱時間が大幅に
短くできる。 By heating and crystallizing the mouth and neck of the preform before stretch forming using a near-infrared heating device, the heating time is shorter than that using conventional heating methods such as far-infrared rays, hot air, and induction heating. Can be made significantly shorter.
すなわち遠赤外線ヒータを用いた場合２〜８分
要したものが、近赤外線ヒータを利用したことに
より50〜90秒ですむことが実験の結果判明した。 That is, as a result of experiments, it was found that what would have taken 2 to 8 minutes using a far-infrared heater can be completed in 50 to 90 seconds by using a near-infrared heater.
また近赤外線加熱装置による加熱は他の加熱装
置を用いたものに比べて口頸部の内外面が均一に
加熱されるため、残留歪が少なくなつて、品質的
にも良いものが生産できる。 In addition, heating with a near-infrared heating device heats the inner and outer surfaces of the mouth and neck more uniformly than with other heating devices, so there is less residual strain and products with better quality can be produced.
（発明の効果）
この発明は以上詳述したようにして成り、延伸
成形前のプリフオームの口頸部を、プリフオーム
の搬送路に沿つて配列された複数個の近赤外線加
熱装置により加熱結晶化させるようにしたので、
従来のものに比べて加熱時間を大幅に短くできる
と共に、口頸部の内外面が均一に加熱され、残留
歪が少なくなり高品質のものが生産できる。(Effects of the Invention) The present invention is constructed as described in detail above, in which the mouth and neck of the preform before stretch-molding is heated and crystallized by a plurality of near-infrared heating devices arranged along the conveyance path of the preform. I did it like this,
The heating time can be significantly shortened compared to conventional methods, and the inner and outer surfaces of the mouth and neck are heated evenly, resulting in less residual distortion and higher quality products.
また近赤外線による加熱のため結晶化部と非結
晶化部の境界を反射板等を用いることにより、ク
リアーに結晶化できるメリツトを有する。 Furthermore, by using a reflective plate or the like at the boundary between the crystallized portion and the non-crystallized portion due to near-infrared heating, it has the advantage of being able to crystallize clearly.
そしてクリアーに結晶化すると延伸が容易にで
きるのでボトルの耐熱性も向上する。 Clear crystallization allows for easy stretching, which improves the heat resistance of the bottle.
従つてこの発明によればびんの口頸部に設けた
ねじやネツクリング等の段差を有する口頸部にお
いても均一な結晶化を与えることができ、また次
のブロー成形工程のボトル成形が容易となり、し
かも上述したようにこれを近赤外線加熱処理によ
つて行なうことにより、迅速且つ容易な加熱結晶
化が可能となる。 Therefore, according to the present invention, it is possible to provide uniform crystallization even in the neck part of the bottle which has a step such as a screw or a neck ring, and it is also possible to easily form the bottle in the next blow molding process. Moreover, by performing this by near-infrared heat treatment as described above, rapid and easy heating crystallization becomes possible.
そしてこの発明の方法によつて得られる容器は
透明性、ガスバリアー性、強度、耐衝撃性等の容
器特性にすぐれ、且つ熱間充填によつても変形の
生じる事のない容器を提供できるものである。 The container obtained by the method of the present invention has excellent container properties such as transparency, gas barrier properties, strength, and impact resistance, and can provide a container that does not undergo deformation even during hot filling. It is.
第１図ａ，ｂはこの発明の方法を実施する装置
の概略図、第２図は第１図の装置の要部概略図、
第３図はこの発明の近赤外線加熱装置を用いた場
合と従来のものを用いたときの口頸部結晶化度の
結果を示す図表である。
４……搬送通路、９，９1，９2，……，９o…
…近赤外線加熱装置、９ａ……近赤外線ヒータ、
９ｂ……近赤外線ヒータ、Ｗ……プリフオーム
（ワーク）。
1a and 1b are schematic diagrams of an apparatus for carrying out the method of the present invention, and FIG. 2 is a schematic diagram of the main parts of the apparatus of FIG. 1.
FIG. 3 is a chart showing the results of mouth and neck crystallinity when using the near-infrared heating device of the present invention and when using a conventional device. 4... Conveyance path, 9, 9 1 , 9 2 ,..., 9 o ...
...Near infrared heating device, 9a...Near infrared heater,
9b... Near infrared heater, W... Preform (work).
Claims (1)
形状の口頸部を備えたプリフオームを二軸延伸す
ることからなる飽和ポリエステルのびんの製造方
法であつて、延伸成形前のプリフオームの口頸部
を該プリフオーム搬送通路に沿つて配列された複
数個の近赤外線加熱装置によつて加熱結晶化する
ようにしたことを特徴とする、飽和ポリエステル
びんの口頸部の結晶化方法。1. A method for producing a saturated polyester bottle, which comprises biaxially stretching a preform made of saturated polyester and having a neck portion shaped to engage a lid, the method comprising biaxially stretching the neck portion of the preform before stretching and forming. A method for crystallizing the mouth and neck of a saturated polyester bottle, the method comprising heating and crystallizing using a plurality of near-infrared heating devices arranged along a preform conveyance path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62005883A JPS63176129A (en) | 1987-01-16 | 1987-01-16 | Manufacture of saturated polyester bottle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62005883A JPS63176129A (en) | 1987-01-16 | 1987-01-16 | Manufacture of saturated polyester bottle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63176129A JPS63176129A (en) | 1988-07-20 |
| JPH059261B2 true JPH059261B2 (en) | 1993-02-04 |
Family
ID=11623298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62005883A Granted JPS63176129A (en) | 1987-01-16 | 1987-01-16 | Manufacture of saturated polyester bottle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63176129A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4562320B2 (en) * | 2001-06-29 | 2010-10-13 | 株式会社吉野工業所 | Fast whitening method for synthetic resin containers |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59201824A (en) * | 1983-04-28 | 1984-11-15 | Mitsubishi Plastics Ind Ltd | Crystallization of bottle mouth stopper part |
-
1987
- 1987-01-16 JP JP62005883A patent/JPS63176129A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59201824A (en) * | 1983-04-28 | 1984-11-15 | Mitsubishi Plastics Ind Ltd | Crystallization of bottle mouth stopper part |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63176129A (en) | 1988-07-20 |
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