JP2016187937A - Rotary type blow molding device and method - Google Patents

Rotary type blow molding device and method Download PDF

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JP2016187937A
JP2016187937A JP2015069295A JP2015069295A JP2016187937A JP 2016187937 A JP2016187937 A JP 2016187937A JP 2015069295 A JP2015069295 A JP 2015069295A JP 2015069295 A JP2015069295 A JP 2015069295A JP 2016187937 A JP2016187937 A JP 2016187937A
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mold
arm
blow molding
molded product
clamping mechanism
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JP6634691B2 (en
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勝幸 河田
Katsuyuki Kawada
勝幸 河田
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Kyoraku Co Ltd
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Kyoraku Co Ltd
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    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/28—Blow-moulding apparatus
    • B29C49/30—Blow-moulding apparatus having movable moulds or mould parts
    • B29C49/36—Blow-moulding apparatus having movable moulds or mould parts rotatable about one axis
    • 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
    • B29C49/70—Removing or ejecting blown articles from the mould

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a compact rotary type blow molding device and method suitable for producing a compact container.SOLUTION: A rotary type blow molding device 20 comprises: a rotary wheel 25; plural mold fastening mechanisms 30 disposed in the surrounding of the rotary wheel 25; a set of molds 40 each of which is attached to each mold fastening mechanism 30 and which comprises a first mold 41 and a second mold 42 having a storage part 46 in a cavity face 43; and arms 50 each of which is disposed on each mold fastening mechanism 30 so as to rotate and approach the second mold 42 and which takes out a molded article from the set of molds 40. The arm 50 is configured to form a part of the cavity face 43 of the second mold 42 in a state of being arranged in the storage part 46, and when the first mold 41 is relatively moved to the second mold 42 for mold fastening by the mold fastening mechanism 30, and when the molded article is taken out by mold opening, the arm 50 is separated from the storage part 46 of the second mold 42 in a state of holding the molded article.SELECTED DRAWING: Figure 5

Description

本発明は、ロータリー式のブロー成形装置及びブロー成形方法に関する。   The present invention relates to a rotary blow molding apparatus and a blow molding method.

ロータリー式のブロー成形装置では、回転輪を回転させながら、押出機からパリソンを押し出し、回転輪に設けた複数の金型のそれぞれにおいてパリソンをブロー成形することより、成形品を連続的に形成することができる。従来、このように量産性に優れたロータリー式のブロー成形装置に関し、各種の技術が提案されている（例えば、特許文献１参照）。   In a rotary blow molding apparatus, a parison is extruded from an extruder while rotating a rotating wheel, and a parison is blow-molded in each of a plurality of molds provided on the rotating wheel, thereby continuously forming a molded product. be able to. Conventionally, various techniques have been proposed for such a rotary blow molding apparatus excellent in mass productivity (see, for example, Patent Document 1).

特許文献１には、回転台に設けられた金型の型締めなどのタイミングをレール（カム板）により機械的に制御する技術が開示される。また、特許文献２には、金型に対する型締め力を得るため、金型を開閉動作するエアシリンダーに加え、型締め用のロック機構をさらに備えるロータリー式のブロー成形装置が開示される。また、特許文献３には、ロータリー式のブロー成形装置を用い、不要部分（バリ）を介して連結された中空容器の連続体を形成し、この中空容器の連続体を巻き取り、その後、不要部分を除去する技術が開示される。   Patent Document 1 discloses a technique for mechanically controlling the timing of mold clamping of a mold provided on a turntable by a rail (cam plate). Patent Document 2 discloses a rotary blow molding apparatus that further includes a lock mechanism for clamping in addition to an air cylinder that opens and closes the mold in order to obtain a clamping force for the mold. Further, Patent Document 3 uses a rotary blow molding device to form a continuous body of hollow containers connected via unnecessary portions (burrs), winds up the continuous body of the hollow containers, and then is unnecessary. Techniques for removing portions are disclosed.

特公昭３７−００００９４号公報Japanese Patent Publication No. 37-000094 特開平０６−２７８１９８号公報Japanese Patent Laid-Open No. 06-278198 特開平０７−１４８８２７号公報Japanese Patent Laid-Open No. 07-148827

ところで、近年、様々な分野で利用される小型容器をより効率的に生産したいとの要望がある。しかしながら、従来のロータリー式のブロー成形装置においては、小型容器に適した機構を取り入れるという観点はなかった。   By the way, in recent years, there is a demand for more efficiently producing small containers used in various fields. However, the conventional rotary blow molding apparatus has no viewpoint of incorporating a mechanism suitable for a small container.

本発明は、このような事情に鑑みてなされたものであり、その目的は、小型容器を製造するのに適したロータリー式のブロー成形装置及びブロー成形方法を提供することにある。   This invention is made | formed in view of such a situation, The objective is to provide the rotary-type blow molding apparatus and blow molding method suitable for manufacturing a small container.

本発明は、以下の構成によって把握される。
（１）本発明に係る第１の観点は、ロータリー式のブロー成形装置であって、回転輪と、前記回転輪の周囲に配設された複数の型締機構と、各型締機構に取り付けられ、第１の金型と、キャビティ面に収容部を有する第２の金型とを含む１組の金型と、各型締機構に前記第２の金型と近接して回動可能に設けられ、成形品を前記１組の金型から取り出すアームと、を備え、前記アームが、前記収容部内に配置された状態で前記第２の金型の前記キャビティ面の一部を構成するように形成されており、前記型締機構によって前記第１の金型を前記第２の金型に対して相対的に移動して型締めされ、型開きされて前記成形品を取り出すときには、前記成形品を保持した状態で前記アームが前記第２の金型の前記収容部から離脱することを特徴とする。 The present invention is grasped by the following composition.
(1) A first aspect of the present invention is a rotary blow molding apparatus, which is attached to a rotary wheel, a plurality of mold clamping mechanisms arranged around the rotary wheel, and each mold clamping mechanism. And a pair of molds including a first mold and a second mold having a receiving portion on the cavity surface, and each mold clamping mechanism is rotatable in the vicinity of the second mold. And an arm for taking out the molded product from the set of molds, and the arm is configured to constitute a part of the cavity surface of the second mold in a state of being disposed in the housing portion. When the mold is clamped by moving the first mold relative to the second mold by the mold clamping mechanism, the mold is opened, and the molded product is taken out. The arm is detached from the accommodating portion of the second mold while holding an article. .

（２）上記（１）の構成において、前記アームは、前記型締機構から延在する上腕部と、前記上腕部から前記第２の金型の側に向かって延在する前腕部と、を有し、前記前腕部の一端が前記第２の金型の前記キャビティ面を構成するとともに前記成形品を保持する保持部を有してもよい。 (2) In the configuration of (1), the arm includes: an upper arm portion extending from the mold clamping mechanism; and a forearm portion extending from the upper arm portion toward the second mold side. And having one end of the forearm portion constituting the cavity surface of the second mold and a holding portion for holding the molded product.

（３）上記（２）の構成において、前記保持部は、前記成形品を係止して取り出せるように、前記成形品を構成する樹脂が入り込むことが可能な凹部を有してもよい。 (3) In the configuration of the above (2), the holding portion may have a recess capable of entering a resin constituting the molded product so that the molded product can be locked and taken out.

（４）本発明に係る第２の観点は、ロータリー式のブロー成形方法であって、回転輪の周囲に配設された複数の型締機構と、各型締機構に取り付けられた第１の金型と第２の金型とを含む１組の金型と、各型締機構に前記第２の金型と近接して回動可能に設けられたアームとを準備するステップ（Ａ）と、前記アームを前記第２の金型のキャビティ面の一部を構成するように前記第２の金型の前記キャビティ面に形成された収容部に配置するステップ（Ｂ）と、前記１組の金型の間にパリソンを配置した状態で、前記型締機構により前記第１の金型と前記第２の金型を相対的に移動させて型閉じを行うステップ（Ｃ）と、前記パリソン内に圧力流体を導入し、賦形するとともに回転する間に成形品を冷却するステップ（Ｄ）と、前記型締機構に型開きを行うステップ（Ｅ）と、前記アームを回動させて前記収容部から離脱させることにより、前記成形品を前記第２の金型から取り出すステップ（Ｆ）と、を備えることを特徴とする。 (4) A second aspect of the present invention is a rotary blow molding method, which includes a plurality of mold clamping mechanisms disposed around a rotating wheel, and a first clamp mechanism attached to each mold clamping mechanism. (A) preparing a set of molds including a mold and a second mold, and an arm provided in each mold clamping mechanism so as to be rotatable in the vicinity of the second mold; (B) disposing the arm in a housing portion formed on the cavity surface of the second mold so as to constitute a part of the cavity surface of the second mold; A step of closing the mold by relatively moving the first mold and the second mold by the mold clamping mechanism with the parison disposed between the molds; A step (D) of introducing a pressure fluid into the substrate, shaping and cooling the molded product while rotating, and the mold clamping mechanism A step (E) of performing mold opening, and a step (F) of taking out the molded product from the second mold by rotating the arm and detaching it from the accommodating portion. To do.

本発明によれば、小型の成形品を次から次へと製造しなくてはならない場合においても、巻き取り可能な連続体として形成することなく、装置からの成形品の取り出しをアームにより効率よく行うことができ、小型容器を製造するのに適した小型のロータリー式のブロー成形装置及びブロー成形方法を提供することができる。   According to the present invention, even when a small molded product has to be manufactured one after another, the arm can efficiently take out the molded product from the apparatus without forming it as a continuous body that can be wound. It is possible to provide a small-sized rotary blow molding apparatus and a blow molding method that can be performed and are suitable for manufacturing a small container.

本発明の実施形態に係る成形品の正面図であり、成形品の内部を見せるため成形品を部分的に破断して示した図である。It is the front view of the molded article which concerns on embodiment of this invention, and is the figure which fractured | ruptured and showed the molded article in order to show the inside of a molded article. 実施形態に係るロータリー式のブロー成形装置の正面図である。1 is a front view of a rotary blow molding apparatus according to an embodiment. 実施形態に係るロータリー式のブロー成形装置の断面図であって、回転輪と取付け板との間で切断し、回転輪側を見た図である。It is sectional drawing of the rotary type blow molding apparatus which concerns on embodiment, Comprising: It is the figure which cut | disconnected between the rotating wheel and the attachment plate, and looked at the rotating wheel side. 図２のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 実施形態に係る型締機構及び金型を含む要部の斜視図である。It is a perspective view of the principal part containing the mold clamping mechanism and metal mold | die which concern on embodiment. 実施形態に係るアームの周辺の構成を説明する図であり、金型の内部を見せるため金型を部分的に破断して示した図である。It is a figure explaining the structure of the periphery of the arm which concerns on embodiment, and is the figure which fractured | ruptured and showed the metal mold | die in order to show the inside of a metal mold | die. 図６のＢ部拡大図である。It is the B section enlarged view of FIG. 実施形態に係るブロー成形方法のステップ（Ｂ）の説明図である。It is explanatory drawing of the step (B) of the blow molding method which concerns on embodiment. 実施形態に係るブロー成形方法のステップ（Ｃ），（Ｄ）の説明図である。It is explanatory drawing of step (C) of the blow molding method which concerns on embodiment, (D). 実施形態に係るブロー成形方法のステップ（Ｅ）の説明図である。It is explanatory drawing of step (E) of the blow molding method which concerns on embodiment. 実施形態に係るブロー成形方法のステップ（Ｆ）の説明図である。It is explanatory drawing of the step (F) of the blow molding method which concerns on embodiment.

（実施形態）
以下、添付図面を参照して、本発明を実施するための形態（以下、「実施形態」と称する）について詳細に説明する。実施形態の説明の全体を通して同じ要素には同じ番号を付している。 (Embodiment)
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the accompanying drawings. The same number is attached | subjected to the same element through the whole description of embodiment.

まず、実施形態に係るロータリー式のブロー成形装置に先立ち、製造対象である成形品の構成を図１に基づいて説明する。   First, prior to the rotary blow molding apparatus according to the embodiment, the configuration of a molded product to be manufactured will be described with reference to FIG.

図１に示すように、成形品１０は、液状の薬品や液状の食品などを収容する小型容器１１（例えば、目薬容器）を向い合せで２つ連ねた中空の樹脂成形品である。各小型容器１１は、有底筒状の胴部１２及び胴部１２に通じる口部１３を有しており、２つの小型容器１１は、それらの口部１３を突き合わせた状態で、筒状の連結部１５を介して連結される。２つの口部１３の間の連結部１５は、成形品１０から切除される不要部分であり、切除されることで各口部１３を開口させる。   As shown in FIG. 1, the molded product 10 is a hollow resin molded product in which two small containers 11 (for example, eye drop containers) that store liquid chemicals or liquid foods face each other. Each small container 11 has a bottomed cylindrical trunk portion 12 and a mouth portion 13 communicating with the trunk portion 12, and the two small containers 11 have a cylindrical shape in a state in which the mouth portions 13 face each other. They are connected via the connecting part 15. The connection part 15 between the two mouth parts 13 is an unnecessary part cut out from the molded article 10, and opens each mouth part 13 by being cut out.

次に、実施形態に係るロータリー式のブロー成形装置（以下、単に「ブロー成形装置」と称する）を図２〜図７に基づいて説明する。   Next, a rotary blow molding apparatus (hereinafter simply referred to as “blow molding apparatus”) according to the embodiment will be described with reference to FIGS.

図２に示すように、ブロー成形装置２０は、フレーム２１と、このフレーム２１に軸受２２を介して回転可能に支持される回転軸２３と、回転軸２３に設けられ、回転軸２３を中心に回転する回転輪２５と、回転軸２３に設けられ、回転輪２５と対向する取付け板２６とを備える。なお、フレーム２１の上部には、装置上部を覆うカバー２１ａを設けてもよい。   As shown in FIG. 2, the blow molding apparatus 20 includes a frame 21, a rotary shaft 23 that is rotatably supported by the frame 21 via a bearing 22, a rotary shaft 23, and the rotary shaft 23. A rotating wheel 25 that rotates and a mounting plate 26 that is provided on the rotating shaft 23 and faces the rotating wheel 25 are provided. A cover 21 a that covers the upper part of the apparatus may be provided on the upper part of the frame 21.

図３に示すように、ブロー成形装置２０は、回転輪２５の周囲に配設された複数（この例では、周方向に等間隔に並ぶ８つ）の型締機構３０を備える。図４に示すように、さらに、ブロー成形装置２０は、各型締機構３０に取り付けられる分割形式の１組の金型４０と、各型締機構３０に回動可能に設けられるアーム５０と、を備える。   As shown in FIG. 3, the blow molding apparatus 20 includes a plurality of (eight in this example, eight in parallel with the circumferential direction) mold clamping mechanisms 30 disposed around the rotating wheel 25. As shown in FIG. 4, the blow molding apparatus 20 further includes a set of divided molds 40 attached to each mold clamping mechanism 30, and an arm 50 provided rotatably on each mold clamping mechanism 30. Is provided.

取付け板２６は、回転軸２３に少なくとも１枚設けられており、取付け板２６には、複数の位置検出手段２７が設けられる。複数の位置検出手段２７は、回転輪２５の回転方向における各金型４０の位置を検出する。制御手段（図示省略）は、複数の位置検出手段２７により検出された各金型４０の位置に基づいて、各型締機構３０の動作を制御し、金型４０の型閉じ、型締め、型開きの動作のタイミングや速度を制御する。位置検出手段２７の種類は、回転輪２５の回転方向における各金型４０の位置を検出できる手段（例えば、光センサや近接センサなどの各種センサ）であれば、任意である。   At least one mounting plate 26 is provided on the rotating shaft 23, and a plurality of position detecting means 27 are provided on the mounting plate 26. The plurality of position detection means 27 detect the position of each mold 40 in the rotation direction of the rotating wheel 25. The control means (not shown) controls the operation of each mold clamping mechanism 30 based on the position of each mold 40 detected by the plurality of position detection means 27, and closes the mold 40, clamps, and molds. Control the timing and speed of the opening movement. The type of the position detection means 27 is arbitrary as long as it is a means capable of detecting the position of each mold 40 in the rotation direction of the rotating wheel 25 (for example, various sensors such as an optical sensor and a proximity sensor).

なお、このブロー成形装置２０では、押出機２８からのパリソン１６（図２参照）が連続的に押し出され、各金型４０に供給されるが、各金型４０で形成された成形品１０は、隣り合う２組の金型４０の間では繋がっていない形態であり、ここでは、連続しない個々の成形品１０が製造される。   In this blow molding device 20, the parison 16 (see FIG. 2) from the extruder 28 is continuously extruded and supplied to each mold 40, but the molded product 10 formed by each mold 40 is It is a form which is not connected between two sets of adjacent molds 40, and here, individual articles 10 that are not continuous are manufactured.

図５に示すように、型締機構３０は、支持盤３３と、この支持盤３３の下部に一方の端部が固定され、互いに平行に延びる２本のタイバー３５と、２本のタイバー３５の他方の端部が固定される第１の型盤３１と、下部に２本のタイバー３５が貫通し、２本のタイバー３５に沿ってスライド可能な第２の型盤３２と、支持盤３３に固定され、第２の型盤３２を第１の型盤３１に対して進退する方向に移動させる電動式のシリンダユニット３６とを備える。   As shown in FIG. 5, the mold clamping mechanism 30 includes a support plate 33, two tie bars 35 having one end fixed to the lower portion of the support plate 33, and extending in parallel to each other, and two tie bars 35. A first template 31 to which the other end is fixed, a second template 32 slidable along the two tie bars 35 through which two tie bars 35 penetrate, and a support plate 33 An electric cylinder unit 36 that is fixed and moves the second mold platen 32 in a direction of advancing and retreating with respect to the first mold platen 31 is provided.

電動式のシリンダユニット３６は、電動モータ（図示省略）によってロッド３６ｂを駆動するように構成されており、ロッド３６ｂを駆動する送りねじとしてボールねじを採用したもの（例えば、株式会社アイエイアイ製のロボシリンダ）である。シリンダユニット３６は、電動モータ、ボールねじ等を収容するシリンダ本体３６ａと、駆動用の送りねじによってシリンダ本体３６ａに対して進退するように直線運動するロッド３６ｂとを備える。シリンダユニット３６は、支持盤３３に固定され、ロッド３６ｂは、その先端部が第２の型盤３２に固定される。   The electric cylinder unit 36 is configured to drive the rod 36b by an electric motor (not shown), and adopts a ball screw as a feed screw for driving the rod 36b (for example, a robot manufactured by IAI Corporation). Cylinder). The cylinder unit 36 includes a cylinder body 36a that houses an electric motor, a ball screw, and the like, and a rod 36b that moves linearly so as to move forward and backward with respect to the cylinder body 36a by a drive feed screw. The cylinder unit 36 is fixed to the support plate 33, and the tip of the rod 36 b is fixed to the second mold plate 32.

１組の金型４０は、第１の金型４１及び第２の金型４２を備える。
第１の金型４１は、第１の型盤３１に固定されており、その背面には、管状のピン挿入部４５が設けられる。このピン挿入部４５には、ブローピン（図示省略）が挿入される。ブローピンは、第１の金型４１及び第２の金型４２に挟まれたパリソン１６における連結部１５を形成する部分を突き破り、圧縮空気を吹き込む。 One set of molds 40 includes a first mold 41 and a second mold 42.
The 1st metal mold | die 41 is being fixed to the 1st template 31, and the tubular pin insertion part 45 is provided in the back surface. A blow pin (not shown) is inserted into the pin insertion portion 45. The blow pin breaks through a portion forming the connecting portion 15 in the parison 16 sandwiched between the first mold 41 and the second mold 42 and blows in compressed air.

第２の金型４２は、第２の型盤３２に固定される。第２の金型４２は、成形品１０（図１参照）の半部を形成するキャビティ面４３を有する。このキャビティ面４３の中央部分、すなわち、連結部１５（図１参照）を形成する部分には、収容部４６が設けられる。この収容部４６は、キャビティ面４３に形成される下側収容部４６ａと、下側収容部４６ａの上端から第２の金型４２の合わせ面を上方に向けて延び、第２の金型４２の上面に通じる上側収容部４６ｂとからなる。収容部４６は溝状、凹状などアーム５０の形状に応じてアーム５０が収容可能な形状とすることができる。   The second mold 42 is fixed to the second mold plate 32. The 2nd metal mold | die 42 has the cavity surface 43 which forms the half part of the molded article 10 (refer FIG. 1). An accommodating portion 46 is provided in the central portion of the cavity surface 43, that is, in the portion forming the connecting portion 15 (see FIG. 1). The accommodating portion 46 extends from the upper end of the lower accommodating portion 46 a formed on the cavity surface 43 and the upper surface of the lower accommodating portion 46 a with the mating surface of the second mold 42 upward, and the second mold 42. And an upper accommodating portion 46b that communicates with the upper surface. The accommodating portion 46 can have a shape that can accommodate the arm 50 according to the shape of the arm 50 such as a groove shape or a concave shape.

図６に示すように、アーム５０は、第２の金型４２に近接して型締機構３０に回動可能に設けられる。この例では、アーム５０は、第２の型盤３２の上部に設けられる取付け部材５１に、回動軸５２を介して回動可能に取り付けられており、回動軸５２から延在する上腕部５３と、この上腕部５３から第２の金型４２の側に向かって延在する前腕部５５と、を有する。このように、アーム５０を上腕部５３及び前腕部５５からなる屈曲した形状に形成することにより、小さい回動角度でも、アーム５０の前腕部５５の先端部（後述する保持部５６）を大きく回動させることができる。   As shown in FIG. 6, the arm 50 is provided in the mold clamping mechanism 30 so as to be rotatable in the vicinity of the second mold 42. In this example, the arm 50 is rotatably attached to an attachment member 51 provided on the upper portion of the second mold plate 32 via a rotation shaft 52, and an upper arm portion extending from the rotation shaft 52. 53, and a forearm portion 55 extending from the upper arm portion 53 toward the second mold 42 side. Thus, by forming the arm 50 into a bent shape composed of the upper arm portion 53 and the forearm portion 55, the tip end portion (a holding portion 56 described later) of the arm 50 is rotated largely even at a small rotation angle. Can be moved.

前腕部５５は、先端部を含む一端が第２の金型４２のキャビティ面４３の一部を構成するように下側収容部４６ａ及び上側収容部４６ｂと調和した形状を有しており、第２の金型４２のキャビティ面４３を構成するとともに成形品１０の連結部１５を保持可能な保持部５６を有する。   The forearm portion 55 has a shape in harmony with the lower housing portion 46a and the upper housing portion 46b so that one end including the distal end portion forms part of the cavity surface 43 of the second mold 42. It has a holding part 56 that constitutes the cavity surface 43 of the second mold 42 and can hold the connecting part 15 of the molded product 10.

図７に示すように、保持部５６は、型開きの際、成形品１０を第２の金型４２側に残し、かつ、成形品１０を係止して取り出すための凹部５７を有する。凹部５７には、成形品１０の成形材料（溶融樹脂）がブロー成形時に入り込むことが可能であり、また、凹部５７は、第２の金型４２においてアンダカットとなる部分を形成する。この例では、第２の金型４２の開閉方向に対して斜め方向に突出するアンダカット部１７（図６参照）を成形品１０に形成する。   As shown in FIG. 7, the holding portion 56 has a concave portion 57 for leaving the molded product 10 on the second mold 42 side when the mold is opened and for locking and removing the molded product 10. The molding material (molten resin) of the molded product 10 can enter the concave portion 57 at the time of blow molding, and the concave portion 57 forms an undercut portion in the second mold 42. In this example, an undercut portion 17 (see FIG. 6) that protrudes obliquely with respect to the opening / closing direction of the second mold 42 is formed in the molded product 10.

なお、この例では、型開きの際、成形品１０を第２の金型４２側に残し、かつ、成形品１０を係止して取り出すための構成として、凹部５７を保持部５６に設けた構成を例示したが、この他、保持部５６としてはアーム５０に真空吸引用の穴を設け、この真空吸引の負圧によって成形品１０を吸着することで、成形品１０を第２の金型４２側に残したり、成形品１０をアーム５０に保持させたりすることもできる。   In this example, when the mold is opened, the concave portion 57 is provided in the holding portion 56 as a configuration for leaving the molded product 10 on the second mold 42 side and locking and removing the molded product 10. In addition to this, the holding portion 56 is provided with a vacuum suction hole in the arm 50, and the molded product 10 is adsorbed by the negative pressure of the vacuum suction, whereby the molded product 10 is attached to the second mold. It can be left on the 42 side or the molded product 10 can be held by the arm 50.

以上のように構成されるアーム５０は、１組の金型４０が型締機構３０によって型閉じされて型締めされるときには、第２の金型４２の収容部４６に嵌合し、１組の金型４０が型締機構３０によって型開きされて成形品１０を取り出すときには、第２の金型４２の収容部４６から離脱してエジェクタとして機能する。   The arm 50 configured as described above is fitted into the accommodating portion 46 of the second mold 42 when the set of molds 40 is closed and clamped by the mold clamping mechanism 30. When the mold 40 is opened by the mold clamping mechanism 30 and the molded product 10 is taken out, the mold 40 is detached from the accommodating portion 46 of the second mold 42 and functions as an ejector.

続いて、実施形態に係るブロー成形方法を図８〜図１１に基づいて説明する。このブロー成形方法は、ブロー成形装置２０を用い、成形品１０を製造する方法であって、以下のステップ（Ａ）〜ステップ（Ｆ）を含む。まず、ステップ（Ａ）において、上述したように、回転輪２５の周囲に配設された複数の型締機構３０と、各型締機構３０に取り付けられ、第１の金型４１と第２の金型４２とを含む１組の金型４０と、各型締機構３０に第２の金型４２と近接して回動可能に設けられたアーム５０とを準備する。   Next, the blow molding method according to the embodiment will be described with reference to FIGS. This blow molding method is a method for manufacturing a molded article 10 using the blow molding apparatus 20, and includes the following steps (A) to (F). First, in step (A), as described above, the plurality of mold clamping mechanisms 30 disposed around the rotary wheel 25 and each mold clamping mechanism 30 are attached to the first mold 41 and the second mold. A set of molds 40 including a mold 42 and an arm 50 provided in each mold clamping mechanism 30 so as to be rotatable in proximity to the second mold 42 are prepared.

次に、図８に示すように、ステップ（Ｂ）では、アーム５０を第２の金型４２側に下方に回動させ、第２の金型４２のキャビティ面４３の一部を構成するようにアーム５０の前腕部５５を第２の金型４２の収容部４６に嵌合する。   Next, as shown in FIG. 8, in step (B), the arm 50 is rotated downward toward the second mold 42 so as to constitute a part of the cavity surface 43 of the second mold 42. The forearm portion 55 of the arm 50 is fitted into the accommodating portion 46 of the second mold 42.

図９に示すように、ステップ（Ｃ）では、溶融樹脂からなる筒状のパリソン１６を第１の金型４１と第２の金型４２の間に配置した状態で、シリンダ本体３６ａからロッド３６ｂを前進させ、換言すれば第１の金型１と第２の金型４２を相対的に移動させ、１組の金型４０に対し型閉じを行う。ステップ（Ｄ）では、パリソン１６を１組の金型４０内で膨出させ、すなわちパリソン内に圧力流体を導入して賦形し、成形品１０を型締めして形成する。この際、凹部５７（図７参照）には、樹脂が入り込んでアンダカット部１７（図６参照）が形成される。そして、回転する間に成形品１０を金型４０内で所定の温度まで冷却する。   As shown in FIG. 9, in step (C), the cylindrical parison 16 made of a molten resin is disposed between the first mold 41 and the second mold 42, and then the cylinder main body 36a to the rod 36b. In other words, the first mold 1 and the second mold 42 are moved relative to each other, and the molds 40 are closed. In step (D), the parison 16 is swelled in one set of molds 40, that is, a pressure fluid is introduced into the parison and shaped, and the molded product 10 is clamped. At this time, the resin enters the recess 57 (see FIG. 7) to form the undercut portion 17 (see FIG. 6). Then, the molded product 10 is cooled in the mold 40 to a predetermined temperature while rotating.

図１０に示すように、ステップ（Ｅ）では、シリンダ本体３６ａ側にロッド３６ｂを後退させることにより、１組の金型４０を型開きする。この際、凹部５７により形成されるアンダカット部１７（図６参照）によって、成形品１０は、第２の金型４２側に残る。   As shown in FIG. 10, in step (E), the set of molds 40 is opened by retracting the rod 36b toward the cylinder body 36a. At this time, the molded product 10 remains on the second mold 42 side by the undercut portion 17 (see FIG. 6) formed by the concave portion 57.

図１１に示すように、ステップ（Ｆ）では、アーム５０を上方に回動させて、収容部４６からアーム５０の前腕部５５を離脱させる。これにより、アーム５０がエジェクタとして機能し、成形品１０を保持部５６に保持した状態で、第２の金型４２から取り出す。取り出された成形品１０は、別のロボットアーム（図示省略）などに受け渡され、連結部１５を切除する工程など次工程に搬送される。   As shown in FIG. 11, in step (F), the arm 50 is rotated upward to disengage the forearm portion 55 of the arm 50 from the accommodating portion 46. Thereby, the arm 50 functions as an ejector, and the molded product 10 is taken out from the second mold 42 while being held by the holding portion 56. The molded product 10 taken out is delivered to another robot arm (not shown) or the like, and conveyed to the next step such as a step of cutting the connecting portion 15.

（実施形態の効果）
以上、説明した実施形態の効果について述べる。
本実施形態によれば、小型の成形品１０を次から次へと製造しなくてはならない場合においても、成形品１０を巻き取り可能な連続体として形成することなく、装置からの成形品１０の取り出しをアーム５０により効率よく行うことができ、小型容器１１を製造するのに適した小型のロータリー式のブロー成形装置及びブロー成形方法を提供することができる。 (Effect of embodiment)
The effects of the embodiment described above will be described.
According to this embodiment, even when the small molded article 10 has to be manufactured from one to the next, the molded article 10 from the apparatus is formed without forming the molded article 10 as a continuous body that can be wound up. Can be efficiently taken out by the arm 50, and a small rotary blow molding apparatus and a blow molding method suitable for manufacturing the small container 11 can be provided.

また、回転輪２５とは別の部材（取付け板２６）に、各型締機構３０の動作を制御するための複数の位置検出手段２７を設け、型締めなどのタイミングを電気的に制御するため、回転輪に設けたレール（カム板）によって型締めなどのタイミングを制御する従来の機械的な制御に比べ、回転輪２５の構造の簡素化を図ることができ、小型容器１１の製造に、より適したブロー成形装置２０を提供することができる。   In addition, a plurality of position detecting means 27 for controlling the operation of each mold clamping mechanism 30 is provided on a member (attachment plate 26) different from the rotating wheel 25 to electrically control the timing of mold clamping and the like. The structure of the rotating wheel 25 can be simplified compared to the conventional mechanical control in which the timing such as clamping is controlled by a rail (cam plate) provided on the rotating wheel. A more suitable blow molding apparatus 20 can be provided.

さらに、ブロー成形装置２０では、型締機構３０の要素として電動式のシリンダユニット３６を採用した。電動式のシリンダユニット３６では、ロッド３６ｂを進退させる送りねじに、ボールねじを採用していることから、電動モータを停止させても１組の金型４０が開く方向に逆戻りすることがない。したがって、１組の金型４０の型閉じ、型開きに加え、型締め用のロック機構がなくても、電動式のシリンダユニット３６だけで十分な型締め力が得られる。結果、ロック機構がなくなる分、小型容器１１の製造に適するよう、型締機構３０及びブロー成形装置２０の小型化を図ることができる。また、電動式のシリンダユニット３６では、型締め時の速度調整も細かく制御できるため、成形品１０の溶着部（１組の金型４０の合わせ面に挟まれる部分）を綺麗に仕上げることもできる。   Further, the blow molding apparatus 20 employs an electric cylinder unit 36 as an element of the mold clamping mechanism 30. In the electric cylinder unit 36, since a ball screw is adopted as a feed screw for moving the rod 36b forward and backward, even if the electric motor is stopped, the set of molds 40 does not return backward. Therefore, in addition to the mold closing and opening of the set of molds 40, a sufficient clamping force can be obtained only by the electric cylinder unit 36 even without a locking mechanism for clamping. As a result, the mold clamping mechanism 30 and the blow molding apparatus 20 can be reduced in size so as to be suitable for manufacturing the small container 11 because the lock mechanism is eliminated. In addition, since the electric cylinder unit 36 can finely control the speed adjustment at the time of clamping, the welded portion of the molded product 10 (the portion sandwiched between the mating surfaces of one set of molds 40) can be finished finely. .

以上、実施形態を用いて本発明を説明したが、本発明の技術的範囲は上記実施形態に記載の範囲には限定されないことは言うまでもない。上記実施形態に、多様な変更又は改良を加えることが可能であることが当業者に明らかである。またそのような変更又は改良を加えた形態も本発明の技術的範囲に含まれ得ることが、特許請求の範囲の記載から明らかである。   As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. Further, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

１０ 成形品
１１ 小型容器
１５ 連結部
１６ パリソン
２０ ブロー成形装置
２３ 回転軸
２５ 回転輪
３０ 型締機構
４０ １組の金型
４１ 第１の金型
４２ 第２の金型
４３ キャビティ面
４６ 収容部
５０ アーム
５２ 回動軸
５３ 上腕部
５５ 前腕部
５６ 保持部
５７ 凹部 DESCRIPTION OF SYMBOLS 10 Molded article 11 Small container 15 Connecting part 16 Parison 20 Blow molding apparatus 23 Rotating shaft 25 Rotating wheel 30 Clamping mechanism 40 1 set of molds 41 First mold 42 Second mold 43 Cavity surface 46 Housing part 50 Arm 52 Rotating shaft 53 Upper arm portion 55 Forearm portion 56 Holding portion 57 Recessed portion

Claims (4)

ロータリー式のブロー成形装置であって、
回転輪と、
前記回転輪の周囲に配設された複数の型締機構と、
各型締機構に取り付けられ、第１の金型と、キャビティ面に収容部を有する第２の金型とを含む１組の金型と、
各型締機構に前記第２の金型と近接して回動可能に設けられ、成形品を前記１組の金型から取り出すアームと、を備え、
前記アームが、前記収容部内に配置された状態で前記第２の金型の前記キャビティ面の一部を構成するように形成されており、前記型締機構によって前記第１の金型を前記第２の金型に対して相対的に移動して型締めされ、型開きされて前記成形品を取り出すときには、前記成形品を保持した状態で前記アームが前記第２の金型の前記収容部から離脱することを特徴とするブロー成形装置。 A rotary blow molding device,
A rotating wheel,
A plurality of mold clamping mechanisms disposed around the rotating wheel;
A set of molds attached to each mold clamping mechanism and including a first mold and a second mold having a receiving portion on a cavity surface;
An arm that is provided in each mold clamping mechanism so as to be rotatable in the vicinity of the second mold and takes out a molded product from the set of molds;
The arm is formed so as to constitute a part of the cavity surface of the second mold in a state of being arranged in the housing portion, and the first mold is moved to the first mold by the mold clamping mechanism. When the mold is moved and moved relative to the second mold, and the mold is opened and the molded product is taken out, the arm is held from the accommodating portion of the second mold while holding the molded product. A blow molding device characterized by being detached. 前記アームが、前記型締機構から延在する上腕部と、前記上腕部から前記第２の金型の側に向かって延在する前腕部と、を有し、前記前腕部の一端が前記第２の金型の前記キャビティ面を構成するとともに前記成形品を保持する保持部を有することを特徴とする請求項１に記載のブロー成形装置。   The arm includes an upper arm portion extending from the mold clamping mechanism, and a forearm portion extending from the upper arm portion toward the second mold, and one end of the forearm portion is the first arm portion. 2. The blow molding apparatus according to claim 1, further comprising a holding portion that constitutes the cavity surface of the second mold and holds the molded product. 前記保持部が、前記成形品を係止して取り出せるように、前記成形品を構成する樹脂が入り込むことが可能な凹部を有することを特徴とする請求項２に記載のブロー成形装置。   The blow molding apparatus according to claim 2, wherein the holding portion has a recess into which a resin constituting the molded product can enter so that the molded product can be locked and taken out. ロータリー式のブロー成形方法であって、
回転輪の周囲に配設された複数の型締機構と、各型締機構に取り付けられた第１の金型と第２の金型とを含む１組の金型と、各型締機構に前記第２の金型と近接して回動可能に設けられたアームとを準備するステップ（Ａ）と、
前記アームを前記第２の金型のキャビティ面の一部を構成するように前記第２の金型の前記キャビティ面に形成された収容部に配置するステップ（Ｂ）と、
前記１組の金型の間にパリソンを配置した状態で、前記型締機構により前記第１の金型と前記第２の金型を相対的に移動させて型閉じを行うステップ（Ｃ）と、
前記パリソン内に圧力流体を導入し、賦形するとともに回転する間に成形品を冷却するステップ（Ｄ）と、
前記型締機構により型開きを行うステップ（Ｅ）と、
前記アームを回動させて前記収容部から離脱させることにより、前記成形品を前記第２の金型から取り出すステップ（Ｆ）と、を備えることを特徴とするブロー成形方法。 A rotary blow molding method,
A plurality of mold clamping mechanisms disposed around the rotating wheel, a set of molds including a first mold and a second mold attached to each mold clamping mechanism, and each mold clamping mechanism A step (A) of preparing an arm provided rotatably in the vicinity of the second mold;
(B) disposing the arm in a receiving portion formed on the cavity surface of the second mold so as to constitute a part of the cavity surface of the second mold;
(C) performing a mold closing by relatively moving the first mold and the second mold by the mold clamping mechanism in a state where a parison is disposed between the pair of molds; ,
Introducing a pressure fluid into the parison, shaping and cooling the molded article while rotating (D);
(E) performing mold opening by the mold clamping mechanism;
A step (F) of taking out the molded product from the second mold by rotating the arm so as to be detached from the housing portion.
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JP7244758B2 (en) * 2019-05-28 2023-03-23 キョーラク株式会社 Robot system, manufacturing method of molded products
WO2020241478A1 (en) * 2019-05-28 2020-12-03 キョーラク株式会社 Robot system, and method for manufacturing molded article
CN113561452A (en) * 2021-07-29 2021-10-29 杨雨晴 Be used for production of small and medium-sized plastic products to use automatic blow molding equipment

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