JP4797780B2 - Molten resin lump feeder - Google Patents

Molten resin lump feeder Download PDF

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JP4797780B2
JP4797780B2 JP2006125437A JP2006125437A JP4797780B2 JP 4797780 B2 JP4797780 B2 JP 4797780B2 JP 2006125437 A JP2006125437 A JP 2006125437A JP 2006125437 A JP2006125437 A JP 2006125437A JP 4797780 B2 JP4797780 B2 JP 4797780B2
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molten resin
transfer guide
head
nozzle
resin lump
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JP2007296693A (en
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穣 浅野
宗久 廣田
丈太郎 長尾
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Toyo Seikan Kaisha Ltd
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Toyo Seikan Kaisha Ltd
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Priority to JP2006125437A priority Critical patent/JP4797780B2/en
Application filed by Toyo Seikan Kaisha Ltd filed Critical Toyo Seikan Kaisha Ltd
Priority to US12/278,686 priority patent/US20090014915A1/en
Priority to EP07737326A priority patent/EP1985430B1/en
Priority to KR1020087021577A priority patent/KR101418610B1/en
Priority to CNA2007800056560A priority patent/CN101384410A/en
Priority to PCT/JP2007/053334 priority patent/WO2007094518A1/en
Priority to EP11175653.2A priority patent/EP2404732B1/en
Priority to CN2010101322057A priority patent/CN101890769A/en
Publication of JP2007296693A publication Critical patent/JP2007296693A/en
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本発明は合成高分子材料の溶融樹脂塊の供給装置に関し、特に押出機のダイヘッドから吐出する溶融樹脂の所定量を圧縮成形用の雌型の内へ確実に落とし込めるようにした溶融樹脂塊の供給装置に関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supplying a molten polymer lump of a synthetic polymer material, and more particularly to a molten resin lump that reliably drops a predetermined amount of molten resin discharged from a die head of an extruder into a female mold for compression molding. It relates to a supply device .

一般に熱可塑性樹脂を用いたボトル、キャップ、カップなどの容器を製造する方法として射出成形法や圧縮成形法が知られている。このうち圧縮成形法においては、押出機のダイヘッドから吐出する溶融樹脂の所定量が切断されて溶融樹脂塊とされ、これが圧縮成形用の雌型の内に落とし込まれる。ついで、雌型内の溶融樹脂塊に雄型を押し込んで圧縮成形し、所望の成形品を得ることができる。ボトルを製造する場合には、まず、プリフォームを圧縮成形によって製造し、このプリフォームをブロー成形する（特許文献１参照）。   In general, an injection molding method or a compression molding method is known as a method for producing a container such as a bottle, a cap, or a cup using a thermoplastic resin. Among these, in the compression molding method, a predetermined amount of the molten resin discharged from the die head of the extruder is cut into a molten resin lump, which is dropped into a female mold for compression molding. Subsequently, the male mold is pushed into the molten resin lump in the female mold and compression molded to obtain a desired molded product. When manufacturing a bottle, first, a preform is manufactured by compression molding, and the preform is blow-molded (see Patent Document 1).

本出願人は、先に、押出機のダイヘッドから吐出される溶融樹脂の所定量を切断して溶融樹脂塊とし、これを圧縮成形用の雌型の内に移送する手段として、円筒状の移送ガイドを使う技術を提案している。この技術によれば、溶融樹脂塊は局部的な損傷を受けることなく圧縮成形用の雌型のキャビティ内に落とし込まれる（特開平２００５−３４３１１０号公報参照）。
特開２０００−２８０２４８号公報 The applicant previously cuts a predetermined amount of molten resin discharged from the die head of the extruder into a molten resin lump, and transfers it into a female mold for compression molding as a cylindrical transfer. It proposes a technique that uses guides. According to this technique, the molten resin lump is dropped into a female cavity for compression molding without being locally damaged (see JP-A-2005-343110).
JP 2000-280248 A

しかしながら、従来の溶融樹脂塊供給装置においては、溶融樹脂塊の一部が、円筒状の移送ガイドの内周面に貼着し、これが原因となって、圧縮成形用の雌型の内への落下のタイミングにばらつきが生じ生産管理上好ましくなかった。
そこで、本発明の目的は、押出機のダイヘッドから吐出される溶融樹脂の所定量を切断して溶融樹脂塊とし、圧縮成形用の雌型まで搬送する円筒状の移送ガイドからタイミング遅れなく確実に圧縮成形用の雌型の内に落とし込むことができる溶融樹脂塊の供給装置を提供することにある。 However, in the conventional molten resin lump supply device, a part of the molten resin lump is stuck to the inner peripheral surface of the cylindrical transfer guide, and this causes the inside of the female mold for compression molding. Variations in the timing of the fall caused undesirable results in production management.
Accordingly, an object of the present invention is to reliably cut off a predetermined amount of the molten resin discharged from the die head of the extruder into a molten resin lump and transfer it to a female mold for compression molding without timing delay. An object of the present invention is to provide a molten resin lump supply device that can be dropped into a female mold for compression molding.

上記目的を達成するために、本発明による溶融樹脂の供給装置は、溶融樹脂塊を圧縮成形する成形用の雌型と、この雌型の上に重ね合わせることが可能であって押出機のダイヘッドから吐出される溶融樹脂の所定量を切断して得られた溶融樹脂塊を収容可能な筒状の移送ガイドと、この移送ガイドの頂部に取り付けられ、内側にノズル孔を有するガスノズルヘッドとを備え、前記ノズル孔は前記移送ガイドの収容室の上方領域に開口する噴気口を備え、前記ノズルヘッドは、前記移送ガイドの上部に取り付けられた固定ハウジングと、この固定ハウジング内で回転可能に支承され前記移送ガイドの収容室内に噴気口を開口するノズル孔を有する旋回ヘッドとを備えていることを特徴とするものである。
さらに、本発明による溶融樹脂塊の供給装置の前記ノズル孔は、その孔軸が前記旋回ヘッドの回転軸線に対して所定の角度で交差していることを特徴とするものである。 In order to achieve the above object, a molten resin supply apparatus according to the present invention is capable of being overlaid on a female die for compression molding of a molten resin lump and on the female die, and is a die head of an extruder. A cylindrical transfer guide capable of accommodating a molten resin lump obtained by cutting a predetermined amount of molten resin discharged from the gas, and a gas nozzle head attached to the top of the transfer guide and having a nozzle hole inside The nozzle hole is provided with a blow hole opening in an upper region of the accommodation chamber of the transfer guide, and the nozzle head is supported on a fixed housing attached to an upper portion of the transfer guide and rotatably supported in the fixed housing. And a swivel head having a nozzle hole for opening a jet port in the accommodation chamber of the transfer guide.
Furthermore, the nozzle hole of the molten resin lump supply device according to the present invention is characterized in that the hole axis thereof intersects the rotation axis of the swivel head at a predetermined angle.

本発明による溶融樹脂塊の供給装置によれば、溶融樹脂塊が移送ガイドの収容室の内周面に貼着することなく、短時間に円滑に圧縮成形用の雌型の内に溶融樹脂塊を落とし込むことができ、落下時間のタイミングのばらつきがなく安定した生産管理が容易となる。また、高圧気体の温度を所定の温度に制御する態様であって、高圧気体を加熱した場合には切断、成形時のひずみの緩和や溶融樹脂塊の外観をよくすることができる。さらに、高圧気体を冷却した場合には、溶融樹脂塊の貼着性を低減でき搬送時のハンドリング性を向上させることができる。   According to the molten resin lump supply device of the present invention, the molten resin lump is smoothly and quickly put into the female mold for compression molding without sticking the molten resin lump to the inner peripheral surface of the accommodation chamber of the transfer guide. Can be dropped, and there is no variation in the timing of the fall time, and stable production management becomes easy. Moreover, it is the aspect which controls the temperature of high pressure gas to predetermined | prescribed temperature, Comprising: When high pressure gas is heated, the relief | moderation of the distortion at the time of cutting and shaping | molding and the external appearance of a molten resin lump can be improved. Furthermore, when the high-pressure gas is cooled, the sticking property of the molten resin lump can be reduced and the handling property at the time of transport can be improved.

以下本発明による溶融樹脂塊の供給装置の実施形態を図面を参照して説明する。
図１は単層のロータリー式圧縮成形装置の平面図を示しており、符号１は押出機を示している。この押出機１はスクリューを内蔵しており、ダイヘッド２からポリプロピレン、ポリエチレンテレフタレートなどの熱可塑性樹脂の溶融樹脂を吐出するようになっている。この実施形態は単層の圧縮成形装置に本発明を適用したものであるが、本発明はこれに限定されるものではなく、多層溶融樹脂の圧縮成形装置に対しても適用可能である。 Hereinafter an embodiment of a supply device for molten resin mass according to the present invention will be described with reference to the drawings.
FIG. 1 shows a plan view of a single-layer rotary compression molding apparatus, and reference numeral 1 denotes an extruder. The extruder 1 has a built-in screw, and discharges a molten resin of a thermoplastic resin such as polypropylene or polyethylene terephthalate from a die head 2. In this embodiment, the present invention is applied to a single-layer compression molding apparatus, but the present invention is not limited to this, and can also be applied to a compression molding apparatus for multilayer molten resin.

符号３はロータリー式の圧縮成形金型のうち下部の雌型を示しており、多数の圧縮成形用の雌型３，３・・３が回転テーブル４の円周上に等間隔をおいて配置されている。
また、前記押出機１と回転テーブル４との間には、押出機１のダイヘッド２から吐出される溶融樹脂の所定量を切断して溶融樹脂塊とし、この溶融樹脂塊を前記圧縮成形金型３の雌型の内に落とし込むため、ロータリー式のカッターガイド５が設置されている。このカッターガイド５はハブ６を有し、このハブ６からアーム７，７・・７が円周方向に等間隔をおいて放射状に延出している。各アーム７の先端には、本発明の要部を構成する移送ガイド８が取り付けられている。なお、図中符号５０は圧縮成形されたプリフォームを次の工程へ搬出するための取り出しローラを示している。 Reference numeral 3 denotes a lower female mold of the rotary type compression molding mold, and a large number of female molds 3, 3,... 3 are arranged on the circumference of the rotary table 4 at equal intervals. Has been.
A predetermined amount of molten resin discharged from the die head 2 of the extruder 1 is cut between the extruder 1 and the rotary table 4 to form a molten resin lump, and this molten resin lump is used as the compression mold. A rotary cutter guide 5 is installed for dropping into the female mold 3. This cutter guide 5 has a hub 6 from which arms 7, 7,... 7 extend radially at equal intervals in the circumferential direction. A transfer guide 8 constituting a main part of the present invention is attached to the tip of each arm 7. In the figure, reference numeral 50 denotes a take-out roller for carrying out the compression-molded preform to the next step.

前記移送ガイド８は、図２および図３に示されるように、固定移送ガイド９と、この固定移送ガイド９に対してヒンジ軸１０回りを開閉可能に枢着された可動移送ガイド１１とから構成されている。また、前記固定移送ガイド９と可動移送ガイド１０の上縁には溶融樹脂を切断するためのカッター１２、１３が一体的に形成されている。また、前記可動移送ガイド１１が前記固定移送ガイド９に向かって閉じたときに、図４から明らかなように、円筒状の収容室１４が形成され、この収容室１４内に溶融樹脂塊１５が収容される。   As shown in FIGS. 2 and 3, the transfer guide 8 includes a fixed transfer guide 9 and a movable transfer guide 11 pivotally attached to the fixed transfer guide 9 so as to be able to open and close around a hinge shaft 10. Has been. Cutters 12 and 13 for cutting the molten resin are integrally formed on the upper edges of the fixed transfer guide 9 and the movable transfer guide 10. When the movable transfer guide 11 is closed toward the fixed transfer guide 9, as is apparent from FIG. 4, a cylindrical storage chamber 14 is formed, and the molten resin lump 15 is formed in the storage chamber 14. Be contained.

また、本発明によれば、前記移送ガイド１１の頂面にはガスノズルヘッド１６が取り付けられており、詳細を後述するように、収容室１４の上部領域から溶融樹脂塊１５に向けて噴気口より高圧気体を噴出できるようになっている。高圧気体としては窒素ガスなどの不活性ガスや圧縮空気が好適である。また、高圧気体の温度は任意に制御することができる。
しかして、これらの高圧気体を前記移送ガイド８の収容室１４内に吹き込むために前記ガスノズルヘッド１６内には、図４から明らかなように、ノズル孔１７が形成され、その出口側が収容室１４の上部領域に開口する噴気口１８となる一方入口側に給気ポート１９が形成されている。
この給気ポート１９は図示を省略した圧縮空気源に接続されている。 In addition, according to the present invention, the gas nozzle head 16 is attached to the top surface of the transfer guide 11, and as will be described in detail later, from the upper area of the storage chamber 14 toward the molten resin lump 15 from the blow port. High pressure gas can be ejected. As the high-pressure gas, an inert gas such as nitrogen gas or compressed air is suitable. Further, the temperature of the high-pressure gas can be arbitrarily controlled.
Thus, in order to blow these high-pressure gases into the accommodation chamber 14 of the transfer guide 8, a nozzle hole 17 is formed in the gas nozzle head 16, as is apparent from FIG. An air supply port 19 is formed on the one inlet side that becomes the air outlet 18 that opens in the upper region of the air.
The air supply port 19 is connected to a compressed air source (not shown).

次にこの高圧気体に旋回運動を与える実施形態を図６ないし図８を参照して説明する。
図６において、符号２１は固定ハウジングを示しており、この固定ハウジング２１はガスノズルヘッド１６に対して一体的に取り付けられている。この固定ハウジング２１の内側にはボール軸受２２を介して旋回ヘッド２３が回転可能に支承されている。この旋回ヘッド２３はリテーナ部材２４とノズル部材２５とから構成されており、リテーナ部材２４は回転コネクタ２６に対してねじ結合されている。すなわち、リテーナ部材２４の中心にはめねじ孔２７が形成され、このめねじ孔２７が回転コネクタ２６のおねじ部にねじ結合されている。 Next to Figure 6 to the embodiments impart a swirling motion to the high-pressure gas will be explained with reference to FIG.
In FIG. 6 , reference numeral 21 denotes a fixed housing, and the fixed housing 21 is integrally attached to the gas nozzle head 16. A turning head 23 is rotatably supported inside the fixed housing 21 via a ball bearing 22. The swivel head 23 is composed of a retainer member 24 and a nozzle member 25, and the retainer member 24 is screwed to the rotary connector 26. That is, a female screw hole 27 is formed at the center of the retainer member 24, and this female screw hole 27 is screwed to the male thread portion of the rotary connector 26.

また、前記ノズル部材２５はリテーナ部材２４に対してビス止めされている。また中心に通気孔２８が穿設することもできる。さらに、ノズル部材２５には、図７から明らかなように、４個のノズル孔３０A,３０B,３０C,３０Dが円周方向に等間隔をおいて穿設されている。これらのノズル孔３０Aないし３０Dの孔軸は旋回ヘッド２３の回転中心軸線に対して所定の角度で交差している。また、これらのノズル孔３０Aないし３０D に高圧気体を導くために、リテーナ部材２４とノズル部材２５との間には通気路３１が形成されている。 The nozzle member 25 is screwed to the retainer member 24. A vent hole 28 can also be formed in the center. Further, as is apparent from FIG. 7 , the nozzle member 25 is provided with four nozzle holes 30A, 30B, 30C, 30D at equal intervals in the circumferential direction. The hole axes of these nozzle holes 30 </ b> A to 30 </ b> D intersect the rotation center axis of the swivel head 23 at a predetermined angle. An air passage 31 is formed between the retainer member 24 and the nozzle member 25 in order to guide the high-pressure gas to the nozzle holes 30A to 30D.

さらに、前記回転コネクタ２６は図８に詳細に示されているように、
圧縮空気源に接続される給気ポート３１を有する固定部材３２と、この固定部材３２に対してボール軸受３３を介して回転可能な部材３４とから構成されている。 Further, the rotary connector 26, as shown in detail in FIG.
The fixing member 32 includes an air supply port 31 connected to a compressed air source, and a member 34 that can rotate with respect to the fixing member 32 via a ball bearing 33.

また、図４に戻って、前記固定移送ガイド９と可動移送ガイド１０にはそれぞれ微細な空気孔３５が多数穿孔されており、これらの空気孔３５は図示を省略した圧縮空気源に接続されていて圧縮空気を収容室１２内に噴出させるように構成されている。
本発明はこのように構成されているから、ガスノズルヘッド１６のノズル孔から移送ガイドの収容室１４内へ供給された高圧気体は溶融樹脂塊１５の上面に作用し、溶融樹脂塊１５を雌型のキャビティ内へ確実に落とし込むことができる。 Returning to FIG. 4, the fixed transfer guide 9 and the movable transfer guide 10 are each provided with a number of fine air holes 35, and these air holes 35 are connected to a compressed air source (not shown). The compressed air is ejected into the storage chamber 12.
Since the present invention is configured as described above, the high-pressure gas supplied from the nozzle hole of the gas nozzle head 16 into the accommodation chamber 14 of the transfer guide acts on the upper surface of the molten resin lump 15, and the molten resin lump 15 is made female. It can be reliably dropped into the cavity.

本発明を適用する圧縮成形機を示した平面図The top view which showed the compression molding machine to which this invention is applied 開状態にある移送ガイドを示した平面図Plan view showing the transfer guide in the open state 閉状態にある移送ガイドを示した平面図Plan view showing the transfer guide in the closed state 移送ガイドとガスノズルヘッドを示した縦断面図Vertical section showing transfer guide and gas nozzle head 移送ガイドによる溶融樹脂の切断状況を示した説明図Explanatory drawing showing the state of cutting molten resin by the transfer guide 旋回ヘッドを示した縦断面図Vertical section showing swivel head 旋回ヘッドを示した正面図Front view showing swivel head 回転コネクタを示した縦断面図Vertical section showing rotating connector

１ 押出機
２ ダイヘッド
３ 雌型
８ 移送ガイド
１３ 溶融樹脂塊
１６ ガスノズルヘッド 1 Extruder
2 Die head
3 female
8 Transfer guide
13 Molten resin lump
16 Gas nozzle head

Claims (2)

溶融樹脂塊を圧縮成形する成形用の雌型と、この雌型の上に重ね合わせることが可能であって押出機のダイヘッドから吐出される溶融樹脂の所定量を切断して得られた溶融樹脂塊を収容可能な筒状の移送ガイドと、この移送ガイドの頂部に取り付けられ、内側にノズル孔を有するガスノズルヘッドとを備え、前記ノズル孔は前記移送ガイドの収容室の上方領域に開口する噴気口を備え、
前記ノズルヘッドは、前記移送ガイドの上部に取り付けられた固定ハウジングと、この固定ハウジング内で回転可能に支承され前記移送ガイドの収容室内に噴気口を開口するノズル孔を有する旋回ヘッドとを備えていることを特徴とする溶融樹脂塊の供給装置。 Molten resin obtained by cutting a predetermined amount of molten resin that can be superposed on this female mold and discharged from the die head of an extruder. A cylindrical transfer guide capable of accommodating a lump, and a gas nozzle head attached to the top of the transfer guide and having a nozzle hole inside, the nozzle hole opening in a region above the storage chamber of the transfer guide With a mouth,
The nozzle head includes a fixed housing attached to an upper portion of the transfer guide, and a swivel head that is rotatably supported in the fixed housing and has a nozzle hole that opens a jet port in the accommodation chamber of the transfer guide. An apparatus for supplying a molten resin lump characterized by comprising: 前記ノズル孔は、その孔軸が前記旋回ヘッドの回転軸線に対して所定の角度で交差していることを特徴とする請求項１に記載の溶融樹脂塊の供給装置。   2. The molten resin lump supply device according to claim 1, wherein a hole axis of the nozzle hole intersects at a predetermined angle with respect to a rotation axis of the swivel head.
JP2006125437A 2006-02-17 2006-04-28 Molten resin lump feeder Expired - Fee Related JP4797780B2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP2006125437A JP4797780B2 (en) 2006-04-28 2006-04-28 Molten resin lump feeder
EP07737326A EP1985430B1 (en) 2006-02-17 2007-02-16 Apparatus for feeding molten resin mass
KR1020087021577A KR101418610B1 (en) 2006-02-17 2007-02-16 Method and apparatus for supplying molten resin mass, and method and apparatus for compression-molding
CNA2007800056560A CN101384410A (en) 2006-02-17 2007-02-16 Method and apparatus for supplying molten resin mass
US12/278,686 US20090014915A1 (en) 2006-02-17 2007-02-16 Method for feeding molten resin mass and apparatus therefor
PCT/JP2007/053334 WO2007094518A1 (en) 2006-02-17 2007-02-16 Method and apparatus for supplying molten resin mass
EP11175653.2A EP2404732B1 (en) 2006-02-17 2007-02-16 Method and apparatus for feeding molten resin mass in a press mould
CN2010101322057A CN101890769A (en) 2006-02-17 2007-02-16 The supply method of molten resin mass and device

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JP2006125437A JP4797780B2 (en) 2006-04-28 2006-04-28 Molten resin lump feeder

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