JP5271325B2 - Molding apparatus and molding method - Google Patents

Molding apparatus and molding method Download PDF

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JP5271325B2
JP5271325B2 JP2010210069A JP2010210069A JP5271325B2 JP 5271325 B2 JP5271325 B2 JP 5271325B2 JP 2010210069 A JP2010210069 A JP 2010210069A JP 2010210069 A JP2010210069 A JP 2010210069A JP 5271325 B2 JP5271325 B2 JP 5271325B2
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mold
frequency induction
movable
movable mold
pair
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JP2012061826A (en
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文人 上羽
進 堀中
遼 伊藤
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本田技研工業株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology capable of enhancing working efficiency, in a molding technology in which a mold is heated by a heating means. <P>SOLUTION: In (b), a coil 80 is provided to be close to an outer side face 62 of a mold 60 and to an outer side face 52 of a mold 50 in a state that the mold 60 is separated from the mold 50 by a prescribed dimension L1. A coil 100 is provided to be close to an outer side face 63 of the mold 60 and to an outer side face 53 of the mold 50 in a state that the mold 60 is separated from the mold 50 by the prescribed dimension L1. That is, the coil 80 and the coil 100 are arranged in parallel to opening and closing directions of the mold 50 and the mold 60, and the mold 60 is thereby free from an anxiety of touching with the coils 80, 100 when opening the mold. Consequently, the working efficiency is enhanced in this molding device in which the mold 50 and the mold 60 are heated by the heating means 70. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

本発明は、加熱手段で加熱した一対の金型を用いて、成形品を得る成形技術に関する。   The present invention relates to a molding technique for obtaining a molded product using a pair of molds heated by a heating means.

ダイカストや射出成形では、金型のキャビティに溶融状態の材料を注入し、溶融状態の材料が冷却固化することにより、成形品が得られる。溶融状態の材料を注入しているとき、材料の流動性が低下すると、材料はキャビティの隅に行き届く前に固化する。これは材料の充填不足を招き、成形品の品質低下に繋がるため、材料の流動性を促進させる対策が必要となる。   In die casting or injection molding, a molten material is injected into a mold cavity, and the molten material is cooled and solidified to obtain a molded product. When injecting molten material, if the fluidity of the material decreases, the material solidifies before reaching the corners of the cavity. This leads to insufficient filling of the material and leads to a decrease in the quality of the molded product, and therefore measures to promote the fluidity of the material are required.

従来、材料の流動性を促進させるために、その対策を施した成形装置が各種提案されている(例えば、特許文献1(図3b)参照。)。   Conventionally, in order to promote the fluidity of materials, various types of molding apparatuses that have taken such measures have been proposed (see, for example, Patent Document 1 (FIG. 3b)).

特許文献1を次図に基づいて説明する。
図7は従来の技術の基本構成を説明する図であり、成形装置200は、上型201と、下型202と、上型201及び下型202の外周を取り囲むように上型201の外壁面203及び下型202の外壁面204に近接して配置されている高周波誘導コイル205と、この高周波誘導コイル205に接続されている高周波電源とで構成される。
Patent document 1 is demonstrated based on the following figure.
FIG. 7 is a diagram for explaining the basic configuration of the conventional technique. The molding apparatus 200 includes an upper mold 201, a lower mold 202, and outer walls of the upper mold 201 so as to surround the outer periphery of the upper mold 201 and the lower mold 202. 203 and a high frequency induction coil 205 disposed close to the outer wall surface 204 of the lower mold 202 and a high frequency power source connected to the high frequency induction coil 205.

図8は従来の成形技術の作用を説明する図であり、下型202から上型201を離した状態で、高周波電源により高周波誘導コイル205に電流を流し、高周波誘導コイル205で磁界を発生させる。ある一瞬の磁界発生時を取ると、上型201に矢印(1)のように渦電流が発生し、下型202に矢印(2)のように渦電流が発生する。上型201及び下型202は電気抵抗を有するため、渦電流と電気抵抗とでジュール熱が発生し、この熱で上型201及び下型202が加熱される。キャビティに溶融状態の材料を注入する前に、上型201及び下型202を加熱させておくと、材料の流動性が高まるため、成形不良が解消できる。   FIG. 8 is a diagram for explaining the operation of the conventional molding technique. In a state where the upper mold 201 is separated from the lower mold 202, a current is passed through the high frequency induction coil 205 by a high frequency power source, and a magnetic field is generated by the high frequency induction coil 205. . When a momentary magnetic field is generated, an eddy current is generated in the upper mold 201 as indicated by an arrow (1), and an eddy current is generated in the lower mold 202 as indicated by an arrow (2). Since the upper mold 201 and the lower mold 202 have electric resistance, Joule heat is generated by eddy current and electric resistance, and the upper mold 201 and the lower mold 202 are heated by this heat. If the upper mold 201 and the lower mold 202 are heated before the molten material is injected into the cavity, the fluidity of the material is increased, so that molding defects can be eliminated.

ところで、高周波誘導コイル205は、上型201の外壁面203及び下型202の外壁面204に近接させて、巻付けられている。そのため、型開きのために上型201をさらに上昇させるとき、高周波誘導コイル205が上型201の移動の邪魔にならないように対策を施すことが必要であり、使い勝手がよくない。   Incidentally, the high frequency induction coil 205 is wound close to the outer wall surface 203 of the upper mold 201 and the outer wall surface 204 of the lower mold 202. Therefore, when the upper mold 201 is further raised for mold opening, it is necessary to take measures so that the high-frequency induction coil 205 does not interfere with the movement of the upper mold 201, which is not convenient.

そこで、より作業性を向上させることができる成形技術が求められる。   Therefore, a molding technique that can further improve workability is required.

特表2007−535786公報Special table 2007-535786

本発明は、加熱手段で金型を加熱する成形技術において、より作業性を向上させることができる技術を提供することを課題とする。   This invention makes it a subject to provide the technique which can improve workability | operativity more in the shaping | molding technique which heats a metal mold | die with a heating means.

請求項1に係る発明は、加熱手段で加熱した一対の金型を用いて、成形品を得る成形装置において、前記加熱手段は、前記一対の金型の開閉方向に平行である前記一対の金型の一方の外側面、及び前記一対の金型の他方の外側面に近接して各々設けられ、リング状に複数回巻付けたリング部が互いに向き合っている一対の高周波誘導コイルと、これらの高周波誘導コイルに接続され前記高周波誘導コイルに電流を与える高周波電源と、からなることを特徴とする。   The invention according to claim 1 is a molding apparatus for obtaining a molded product using a pair of molds heated by a heating unit, wherein the heating unit is parallel to the opening and closing direction of the pair of molds. A pair of high-frequency induction coils provided in proximity to one outer surface of the mold and the other outer surface of the pair of molds, the ring portions wound in a ring shape facing each other, and A high-frequency power source connected to a high-frequency induction coil and supplying a current to the high-frequency induction coil.

請求項2に係る発明は、高周波電源及び一対の高周波誘導コイルで構成される加熱手段を備えると共に、固定金型及び可動金型を備える成形装置により実施される成形方法であって、前記加熱手段で加熱した前記固定金型及び前記可動金型を用いて、成形品を得る成形方法において、前記固定金型から所定寸法だけ前記可動金型を離した状態で維持する型分離状態維持工程と、前記可動金型の可動方向に平行である前記固定金型の一方の外側面及び前記可動金型の一方の外側面と、前記固定金型の他方の外側面及び前記可動金型の他方の外側面とに、前記一対の高周波誘導コイルを近接させ、これらの高周波誘導コイルの中でリング状に複数回巻付けたリング部が互いに向き合うように、前記一対の高周波誘導コイルを配置させるコイル配置工程と、前記高周波電源により前記一対の高周波誘導コイルに電流を流し、前記固定金型及び前記可動金型に磁界を発生させ、前記固定金型及び前記可動金型に渦電流を発生させ、得られたジュール熱で前記固定金型及び前記可動金型を加熱する加熱工程と、前記固定金型及び前記可動金型の温度が所定温度に達したとき、前記固定金型に前記可動金型を合わせて型締めする型締工程と、型締めした前記固定金型及び前記可動金型のキャビティに、溶融状態にある材料を注入する材料注入工程と、前記キャビティで冷却固化された成形品を取出すために、前記固定金型から前記可動金型を分離させる型開工程と、からなることを特徴とする。   The invention according to claim 2 is a molding method implemented by a molding apparatus including a high-frequency power source and a pair of high-frequency induction coils, and a molding apparatus including a fixed mold and a movable mold, wherein the heating means In a molding method for obtaining a molded product using the fixed mold and the movable mold heated in a mold separation state maintaining step of maintaining the movable mold in a state separated from the fixed mold by a predetermined dimension; One outer surface of the fixed mold and one outer surface of the movable mold that are parallel to the movable direction of the movable mold, the other outer surface of the fixed mold, and the other outer surface of the movable mold. Coil arrangement in which the pair of high-frequency induction coils are arranged close to each other such that the pair of high-frequency induction coils are close to each other and the ring portions wound in a ring shape among these high-frequency induction coils face each other. Then, a current is passed through the pair of high frequency induction coils by the high frequency power source, a magnetic field is generated in the fixed mold and the movable mold, and an eddy current is generated in the fixed mold and the movable mold. A heating step of heating the fixed mold and the movable mold with the generated Joule heat, and when the temperature of the fixed mold and the movable mold reaches a predetermined temperature, the movable mold is attached to the fixed mold. A mold clamping process for clamping the mold together, a material injection process for injecting a material in a molten state into the cavities of the fixed mold and the movable mold, and a molded product cooled and solidified in the cavity. For this purpose, the method includes a mold opening step of separating the movable mold from the fixed mold.

請求項1に係る発明では、一対の高周波誘導コイルは、一対の金型の開閉方向に平行である一対の金型の一方の外側面、及び一対の金型の他方の外側面に近接して設けられている。すなわち、一対の高周波誘導コイルが一対の金型の開閉方向と平行に配置されているので、型開きの際、可動金型が高周波誘導コイルに当たる心配はない。したがって、加熱手段で金型を加熱する成形装置において、より作業性を向上させることができる装置を提供できる。   In the invention according to claim 1, the pair of high frequency induction coils are adjacent to one outer surface of the pair of molds parallel to the opening / closing direction of the pair of molds and the other outer surface of the pair of molds. Is provided. That is, since the pair of high-frequency induction coils are arranged in parallel with the opening / closing direction of the pair of molds, there is no concern that the movable mold will hit the high-frequency induction coils when the mold is opened. Therefore, in the molding apparatus that heats the mold with the heating means, it is possible to provide an apparatus that can further improve workability.

請求項2に係る発明では、成形方法は、高周波電源及び一対の高周波誘導コイルで構成される加熱手段を備えると共に、固定金型及び可動金型を備える成形装置により実施される方法であって、加熱手段で加熱した固定金型及び可動金型を用いて、成形品を得る方法である。また、成形方法は、型分離状態維持工程と、コイル配置工程と、加熱工程と、型締工程と、材料注入工程と、型開工程と、からなる。   In the invention according to claim 2, the molding method is a method implemented by a molding apparatus including a heating tool including a high-frequency power source and a pair of high-frequency induction coils, and including a stationary mold and a movable mold, This is a method of obtaining a molded product using a fixed mold and a movable mold heated by a heating means. The molding method includes a mold separation state maintaining process, a coil arranging process, a heating process, a mold clamping process, a material injection process, and a mold opening process.

コイル配置工程では、可動金型の可動方向に平行である固定金型の一方の外側面及び可動金型の一方の外側面と、固定金型の他方の外側面及び可動金型の他方の外側面とに、一対の高周波誘導コイルを近接させ、これらの高周波誘導コイルの中でリング状に複数回巻付けたリング部が互いに向き合うように、一対の高周波誘導コイルを配置させる。   In the coil placement step, one outer surface of the stationary mold and one outer surface of the movable mold, which are parallel to the movable direction of the movable mold, and the other outer surface of the stationary mold and the other outer surface of the movable mold. A pair of high frequency induction coils are placed close to the side surfaces, and the pair of high frequency induction coils are arranged so that the ring portions wound in a ring shape a plurality of times in these high frequency induction coils face each other.

すなわち、一対の高周波誘導コイルが金型の開閉方向と平行に配置されているので、型開きの際、可動金型が高周波誘導コイルに当たる心配はない。したがって、加熱手段で金型を加熱する成形方法において、より作業性を向上させることができる方法を提供できる。   That is, since the pair of high frequency induction coils are arranged in parallel to the opening / closing direction of the mold, there is no concern that the movable mold will hit the high frequency induction coil when the mold is opened. Therefore, in the molding method in which the mold is heated by the heating means, a method that can further improve workability can be provided.

本発明に係る成形装置の正面図である。It is a front view of the shaping | molding apparatus which concerns on this invention. 図1の2部拡大図である。FIG. 2 is an enlarged view of part 2 of FIG. 1. 図2の3−3線断面図である。FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. 固定金型及び可動金型を加熱するまでの作用を説明する図である。It is a figure explaining an effect | action until a fixed metal mold | die and a movable metal mold | die are heated. 型開き後の作用を説明する図である。It is a figure explaining the effect | action after a mold opening. 本発明に係る成形方法のフロー図である。It is a flowchart of the shaping | molding method which concerns on this invention. 従来の技術の基本構成を説明する図である。It is a figure explaining the basic composition of the conventional technology. 従来の成形技術の作用を説明する図である。It is a figure explaining the effect | action of the conventional shaping | molding technique.

本発明の実施の形態を添付図に基づいて以下に説明する。なお、図面は符号の向きに見るものとする。また、以下の説明では、成形装置に射出成形機を適用し、成形方法に射出成形法を適用する。   Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals. In the following description, an injection molding machine is applied to the molding apparatus, and an injection molding method is applied to the molding method.

本発明の実施例を図面に基づいて説明する。
図1に示されるように、射出成形機10は、ベッド11前部に配置されている型締め装置12(詳細後述)と、この型締め装置12に臨むようにベッド11後部に配置されている射出装置31(詳細後述)と、からなる。また、型締め装置12に備えた一対の金型は、固定金型50(詳細後述)と、可動金型60(詳細後述)と、からなる。
Embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the injection molding machine 10 is disposed at the rear of the bed 11 so as to face the mold clamping device 12 (details will be described later) disposed at the front of the bed 11. The injection device 31 (details will be described later). The pair of molds provided in the mold clamping device 12 includes a fixed mold 50 (details will be described later) and a movable mold 60 (details will be described later).

型締め装置12は、ベッド11の中央部に立てた中央支持台13に取付けられている固定盤14と、この固定盤14の前端に固定側取付け板15を介して取付けられている固定金型50と、ベッド11の前端に立てた前端支持台16に取付けられている支持部材17と、固定盤14と支持部材17に取付けられている4本のタイバー18と、これらのタイバー18に水平方向に摺動自在に取付けられている可動盤19と、この可動盤19の後端に可動側取付け板21を介して取付けられている可動金型60と、可動盤19の前端に取付けられ突出しピン(後述)を押出す突出しシリンダ22と、中央支持台13と可動盤19とを繋いでいる型締めシリンダ23と、を備えている。   The mold clamping device 12 includes a stationary platen 14 attached to a central support 13 standing at the center of the bed 11, and a stationary mold attached to the front end of the stationary platen 14 via a stationary side attachment plate 15. 50, a support member 17 attached to the front end support 16 standing on the front end of the bed 11, four tie bars 18 attached to the fixed plate 14 and the support member 17, and a horizontal direction to these tie bars 18 A movable plate 19 slidably attached to the movable platen 19, a movable mold 60 attached to the rear end of the movable platen 19 via the movable side attachment plate 21, and a protruding pin attached to the front end of the movable platen 19. A protruding cylinder 22 that pushes out (described later) and a clamping cylinder 23 that connects the central support 13 and the movable platen 19 are provided.

加えて、固定盤14の上端に、3次元方向に移動可能である自動取出しロボット24が取付けられている。自動取出しロボット24は、可動金型60から突出された樹脂成形品を取出す役目を担うロボットである。   In addition, an automatic take-out robot 24 that is movable in a three-dimensional direction is attached to the upper end of the fixed platen 14. The automatic take-out robot 24 is a robot responsible for taking out the resin molded product protruding from the movable mold 60.

射出装置31は、ベッド11後部に取付けたスライド機構32の上に設けられている射出シリンダ33と、この射出シリンダ33の前端に取付けられスクリューを内蔵している加熱シリンダ34と、この加熱シリンダ34の前端に取付けられ固定金型50の材料注入口に接触するノズル35と、加熱シリンダ34の後端上に取付けられ加熱シリンダ34内へ供給される樹脂材料を貯留するホッパ36と、射出シリンダ33の後端に取付けられスクリューを回転させるスクリュー駆動モータ37と、射出シリンダ33後部に配置されスクリューを水平方向に移動させるスクリュー移動機構38と、中央支持台13とスライド機構32のスライダ39とを繋いでいる射出装置移動シリンダ41と、からなる。   The injection device 31 includes an injection cylinder 33 provided on a slide mechanism 32 attached to the rear portion of the bed 11, a heating cylinder 34 attached to the front end of the injection cylinder 33 and incorporating a screw, and the heating cylinder 34. A nozzle 35 that is attached to the front end of the fixed mold 50 and contacts the material injection port of the fixed mold 50, a hopper 36 that is attached on the rear end of the heating cylinder 34 and stores the resin material supplied into the heating cylinder 34, and an injection cylinder 33. A screw drive motor 37 that is attached to the rear end and rotates the screw, a screw moving mechanism 38 that is arranged at the rear of the injection cylinder 33 and moves the screw in the horizontal direction, and the central support 13 and the slider 39 of the slide mechanism 32 are connected. And an injection device moving cylinder 41.

射出装置移動シリンダ41の引き動作により、スライダ39がレール42に沿って型締め装置12側へ移動するため、ノズル35を固定金型50の材料注入口に接触させることができる。   Since the slider 39 moves along the rail 42 toward the mold clamping device 12 by the pulling operation of the injection device moving cylinder 41, the nozzle 35 can be brought into contact with the material injection port of the fixed mold 50.

加えて、制御装置43は、突出しシリンダ22、型締めシリンダ23、自動取出しロボット24、スクリュー駆動モータ37、スクリュー移動機構38、射出装置移動シリンダ41の各々の作動を制御している。
さらに、固定盤14及び固定金型50の左側方に、固定金型50及び可動金型60を加熱する加熱手段70(詳細後述)が設けられている。加熱手段70の構成を次の図2で説明する。
In addition, the control device 43 controls the operations of the protruding cylinder 22, the clamping cylinder 23, the automatic take-out robot 24, the screw drive motor 37, the screw moving mechanism 38, and the injection device moving cylinder 41.
Furthermore, a heating means 70 (described later in detail) for heating the fixed mold 50 and the movable mold 60 is provided on the left side of the fixed platen 14 and the fixed mold 50. The structure of the heating means 70 will be described with reference to FIG.

図2に示されるように、加熱手段70は、固定盤14の左側面25に左断熱材72を介して取付けられリング状に複数回巻付けた左リング部71(詳細後述)を有する左の高周波誘導コイル80(詳細後述)と、この左の高周波誘導コイル80の下側末端81に左の下側配管82を介して接続されていると共に左の高周波誘導コイル80の上側末端83に左の上側配管84を介して接続され、左の高周波誘導コイル80に電流を与える高周波電源90と、を備える。高周波電源90は交流の電源である。   As shown in FIG. 2, the heating means 70 includes a left ring portion 71 (detailed later) that is attached to the left side surface 25 of the fixed platen 14 via a left heat insulating material 72 and wound in a ring shape a plurality of times. A high-frequency induction coil 80 (described later in detail) is connected to a lower end 81 of the left high-frequency induction coil 80 via a left lower pipe 82 and is connected to an upper end 83 of the left high-frequency induction coil 80 on the left. A high-frequency power supply 90 that is connected via an upper pipe 84 and applies a current to the left high-frequency induction coil 80. The high frequency power supply 90 is an AC power supply.

さらに、左の下側配管82及び高周波電源90に、チラーユニット91が接続されている。
左の高周波誘導コイル80の内部には、常時冷却水が流れており、この冷却水で左の高周波誘導コイル80を冷却する。左の高周波誘導コイル80から高周波電源90に戻った冷却水は、昇温しているので、チラーユニット91の内部で冷媒により冷却して、再度左の高周波誘導コイル80の内部へ流す。すなわち、冷却水は、左の高周波誘導コイル80、高周波電源90、チラーユニット91を循環する。
Further, a chiller unit 91 is connected to the left lower pipe 82 and the high frequency power supply 90.
Inside the left high frequency induction coil 80, cooling water always flows, and the left high frequency induction coil 80 is cooled with this cooling water. Since the cooling water that has returned from the left high-frequency induction coil 80 to the high-frequency power supply 90 has been heated, it is cooled by the refrigerant inside the chiller unit 91 and flows again into the left high-frequency induction coil 80. That is, the cooling water circulates through the left high frequency induction coil 80, the high frequency power supply 90, and the chiller unit 91.

加えて、左の高周波誘導コイル80は、固定金型50と、型締めシリンダ(図1、符号23)の引き動作で想像線に示す位置に移動した可動金型60とが、内径D1内に収まるように形成されている。固定金型50と想像線に示した可動金型60との間の寸法をL1とし、この寸法L1は、固定金型50及び可動金型60を加熱する前に設定される所定寸法を示す。また、固定金型50に、凹状の固定側キャビティ面51が設けられ、可動金型60に、凸状の可動側キャビティ面61が設けられている。   In addition, in the left high frequency induction coil 80, the fixed mold 50 and the movable mold 60 moved to the position indicated by the imaginary line by the pulling operation of the clamping cylinder (FIG. 1, reference numeral 23) are within the inner diameter D1. It is formed to fit. A dimension between the fixed mold 50 and the movable mold 60 indicated by an imaginary line is L1, and this dimension L1 indicates a predetermined dimension set before heating the fixed mold 50 and the movable mold 60. The fixed mold 50 is provided with a concave fixed-side cavity surface 51, and the movable mold 60 is provided with a convex movable-side cavity surface 61.

加熱手段70は、左の高周波誘導コイル80の他に、左の高周波誘導コイル80と同一の寸法で形成され且つ同軸上に配置されている右の高周波誘導コイルも備えている。次に加熱手段70の構造を図3で詳細に説明する。   In addition to the left high-frequency induction coil 80, the heating means 70 also includes a right high-frequency induction coil that is formed with the same dimensions as the left high-frequency induction coil 80 and is arranged coaxially. Next, the structure of the heating means 70 will be described in detail with reference to FIG.

図3に示されるように、加熱手段70は、固定金型50と想像線で示した可動金型60が所定寸法L1(図2参照)だけ離れた状態で、固定金型50の固定金型左外側面52及び可動金型60の可動金型左外側面62に近接して設けられ、リング状に7回巻付けた左リング部71を有する左の高周波誘導コイル80と、固定金型50の固定金型右外側面53及び可動金型60の可動金型右外側面63に近接して設けられ、リング状に7回巻付けた右リング部92を有する右の高周波誘導コイル100と、左の高周波誘導コイル80及び右の高周波誘導コイル100に接続され左の高周波誘導コイル80及び右の高周波誘導コイル100に電流を与える高周波電源90と、からなる。すなわち、加熱手段70は誘導加熱装置である。   As shown in FIG. 3, the heating means 70 is configured such that the fixed mold 50 and the movable mold 60 indicated by an imaginary line are separated from each other by a predetermined dimension L <b> 1 (see FIG. 2). A left high-frequency induction coil 80 having a left ring portion 71 provided close to the left outer surface 52 and the movable mold left outer surface 62 of the movable mold 60 and wound seven times in a ring shape, and the fixed mold 50 A right high-frequency induction coil 100 having a right ring portion 92 that is provided close to the right outer surface 53 of the fixed mold and the movable outer right surface 63 of the movable mold 60 and is wound seven times in a ring shape; The high-frequency power supply 90 is connected to the left high-frequency induction coil 80 and the right high-frequency induction coil 100 and supplies a current to the left high-frequency induction coil 80 and the right high-frequency induction coil 100. That is, the heating means 70 is an induction heating device.

なお、左リング部71及び右リング部92の巻付け数は、実施例では7回としたが、任意に決めてもよい。巻付け数を増加させる程、磁力が強くなるため、巻付け数は増加させることが好ましい。   In addition, although the winding number of the left ring part 71 and the right ring part 92 was 7 in the Example, you may decide arbitrarily. Since the magnetic force becomes stronger as the number of windings is increased, it is preferable to increase the number of windings.

固定金型左外側面52、可動金型左外側面62、固定金型右外側面53、可動金型右外側面63は、各々が固定金型50と可動金型60の開閉方向に平行な面である。
右の高周波誘導コイル100は、固定盤14の右側面26に右断熱材95を介して取付けられている。
The fixed mold left outer surface 52, the movable mold left outer surface 62, the fixed mold right outer surface 53, and the movable mold right outer surface 63 are parallel to the opening and closing directions of the fixed mold 50 and the movable mold 60, respectively. Surface.
The right high-frequency induction coil 100 is attached to the right side surface 26 of the fixed platen 14 via a right heat insulating material 95.

また、左の高周波誘導コイル80及び右の高周波誘導コイル100は、左リング部71と右リング部92が互いに向き合っている一対の高周波誘導コイルである。さらに、左の高周波誘導コイル80と右の高周波誘導コイル100は、同一の内径D1で形成され、同一の軸101の上に配置されている。   The left high-frequency induction coil 80 and the right high-frequency induction coil 100 are a pair of high-frequency induction coils in which the left ring portion 71 and the right ring portion 92 face each other. Further, the left high-frequency induction coil 80 and the right high-frequency induction coil 100 are formed with the same inner diameter D <b> 1 and are disposed on the same shaft 101.

さらに、高周波電源90は、右の高周波誘導コイル100の下側末端102に右の下側配管103を介して接続されていると共に、右の高周波誘導コイル100の上側末端104に右の上側配管105を介して接続されている。冷却水は、右の高周波誘導コイル100、高周波電源90、チラーユニット91を循環し、高周波電源90に戻った冷却水はチラーユニット91で冷却される。   Further, the high-frequency power supply 90 is connected to the lower end 102 of the right high-frequency induction coil 100 via the right lower pipe 103, and the right upper pipe 105 is connected to the upper end 104 of the right high-frequency induction coil 100. Connected through. The cooling water circulates through the right high-frequency induction coil 100, the high-frequency power supply 90, and the chiller unit 91, and the cooling water that has returned to the high-frequency power supply 90 is cooled by the chiller unit 91.

以上に述べた射出成形機10の作用を次に述べる。
図4(a)に示されるように、左の高周波誘導コイル80の左リング部71と右の高周波誘導コイル100の右リング部92が互いに向き合い、且つ左リング部71と右リング部92との間に固定金型50が配置されている。この固定金型50に、可動金型60を矢印(3)のように向かわせる。
The operation of the injection molding machine 10 described above will be described next.
As shown in FIG. 4A, the left ring portion 71 of the left high frequency induction coil 80 and the right ring portion 92 of the right high frequency induction coil 100 face each other, and the left ring portion 71 and the right ring portion 92 A fixed mold 50 is disposed between them. The movable mold 60 is directed to the fixed mold 50 as indicated by the arrow (3).

(b)に示されるように、可動金型60の移動を、固定金型50から所定寸法L1だけ離れた状態で止める。高周波電源(図3、符号90)により左の高周波誘導コイル80及び右の高周波誘導コイル100に電流を流し、ある一瞬を取ったとき、矢印(4)、(5)のように磁界が発生する。この磁界の発生によって、固定金型50に矢印(6)のように渦電流が発生し、可動金型60に矢印(7)のように渦電流が発生する。   As shown in (b), the movement of the movable mold 60 is stopped in a state of being separated from the fixed mold 50 by a predetermined dimension L1. When a current is passed through the left high-frequency induction coil 80 and the right high-frequency induction coil 100 by a high-frequency power source (FIG. 3, reference numeral 90) and a certain moment is taken, a magnetic field is generated as indicated by arrows (4) and (5). . Due to the generation of this magnetic field, an eddy current is generated in the fixed mold 50 as indicated by an arrow (6), and an eddy current is generated in the movable mold 60 as indicated by an arrow (7).

固定金型50及び可動金型60に電気抵抗を有するため、渦電流と電気抵抗とでジュール熱が発生し、この熱で固定金型50及び可動金型60が加熱される。なお、固定金型50及び可動金型60の加熱は、型締めの直前に実施される。次に、樹脂成形品が成形され、型開きした後の作用を図5で説明する。   Since the fixed mold 50 and the movable mold 60 have electric resistance, Joule heat is generated by the eddy current and the electric resistance, and the fixed mold 50 and the movable mold 60 are heated by this heat. The heating of the fixed mold 50 and the movable mold 60 is performed immediately before mold clamping. Next, the operation after the resin molded product is molded and the mold is opened will be described with reference to FIG.

図5(a)に示されるように、可動金型60が固定金型50から離れ、可動金型60の可動側キャビティ面61に樹脂成形品106が付着している。すなわち、型開き状態である。   As shown in FIG. 5A, the movable mold 60 is separated from the fixed mold 50, and the resin molded product 106 is attached to the movable side cavity surface 61 of the movable mold 60. That is, the mold is open.

(b)は(a)のb−b線断面図であり、左の高周波誘導コイル80と右の高周波誘導コイル100が可動金型60の左右に配置されているので、可動金型60の上方に障害物がない。そのため、可動金型60から樹脂成形品106を突出しピン107で突出した後、樹脂成形品106を上方から自動取出しロボット(図1、符号24)で円滑に取出すことができる。   (B) is a cross-sectional view taken along the line bb of (a), and the left high-frequency induction coil 80 and the right high-frequency induction coil 100 are arranged on the left and right of the movable mold 60. There are no obstacles. Therefore, after the resin molded product 106 protrudes from the movable mold 60 and protrudes with the pin 107, the resin molded product 106 can be smoothly taken out from above by the automatic take-out robot (FIG. 1, reference numeral 24).

図4(b)に示されるように、左の高周波誘導コイル80は、可動金型60が固定金型50から所定寸法L1だけ離れた状態で、可動金型60の可動金型左外側面62及び固定金型50の固定金型左外側面52に近接して設けられる。また、右の高周波誘導コイル100は、可動金型60が固定金型50から所定寸法L1だけ離れた状態で、可動金型60の可動金型右外側面63及び固定金型50の固定金型右外側面53に近接して設けられる。   As shown in FIG. 4B, the left high-frequency induction coil 80 includes the movable mold 60 on the left outer surface 62 of the movable mold 60 in a state where the movable mold 60 is separated from the fixed mold 50 by a predetermined dimension L1. The fixed mold 50 is provided close to the fixed mold left outer surface 52. Further, the right high-frequency induction coil 100 includes the movable mold 60 on the right outer surface 63 of the movable mold 60 and the fixed mold of the fixed mold 50 in a state where the movable mold 60 is separated from the fixed mold 50 by a predetermined dimension L1. It is provided close to the right outer surface 53.

すなわち、左の高周波誘導コイル80及び右の高周波誘導コイル100が、固定金型50及び可動金型60の開閉方向と平行に配置されているので、型開きの際、可動金型60が高周波誘導コイル80、100に当たる心配はない。したがって、加熱手段70で固定金型50及び可動金型60を加熱する射出成形機(図1、符号10)において、より作業性を向上させることができる装置を提供できる。
次に射出成形機10を用いて実施される射出成形法を説明する。
That is, since the left high-frequency induction coil 80 and the right high-frequency induction coil 100 are arranged in parallel to the opening and closing directions of the fixed mold 50 and the movable mold 60, the movable mold 60 is subjected to high-frequency induction when the mold is opened. There is no worry of hitting the coils 80, 100. Therefore, in the injection molding machine (FIG. 1, reference numeral 10) that heats the fixed mold 50 and the movable mold 60 with the heating means 70, an apparatus that can further improve workability can be provided.
Next, an injection molding method performed using the injection molding machine 10 will be described.

図6に示されるように、ステップ(以下STと記す。)01において、固定金型から所定寸法だけ可動金型を離した状態で維持する。具体的には図4(b)に示されるように、可動金型60の移動を、固定金型50から所定寸法L1だけ離れた状態で止める。   As shown in FIG. 6, in step (hereinafter referred to as ST) 01, the movable mold is kept away from the fixed mold by a predetermined dimension. Specifically, as shown in FIG. 4B, the movement of the movable mold 60 is stopped in a state where it is separated from the fixed mold 50 by a predetermined dimension L1.

ST02において、可動金型の可動方向に平行である固定金型の一方の外側面及び可動金型の一方の外側面と、固定金型の他方の外側面及び可動金型の他方の外側面とに、一対の高周波誘導コイルを近接させる。また、一対の高周波誘導コイルは、リング状に複数回巻付けたリング部が互いに向き合うように配置させる。   In ST02, one outer surface of the fixed mold and one outer surface of the movable mold that are parallel to the movable direction of the movable mold, the other outer surface of the fixed mold, and the other outer surface of the movable mold A pair of high frequency induction coils are brought close to each other. Further, the pair of high frequency induction coils are arranged so that the ring portions wound a plurality of times in a ring shape face each other.

具体的には図4(b)に示されるように、左の高周波誘導コイル80を可動金型60の可動金型左外側面62及び固定金型50の固定金型左外側面52に近接させる。また、右の高周波誘導コイル100を可動金型60の可動金型右外側面63及び固定金型50の固定金型右外側面53に近接させる。さらに、リング状に7回巻付けた左リング部71と右リング部92が互いに向き合うように、左の高周波誘導コイル80と右の高周波誘導コイル100を配置させる。また、左の高周波誘導コイル80と右の高周波誘導コイル100は、図3に示されるように、同一の内径D1で形成され、且つ同一の軸101の上に配置させる。   Specifically, as shown in FIG. 4B, the left high-frequency induction coil 80 is brought close to the movable mold left outer surface 62 of the movable mold 60 and the fixed mold left outer surface 52 of the fixed mold 50. . Further, the right high frequency induction coil 100 is brought close to the movable mold right outer surface 63 of the movable mold 60 and the fixed mold right outer surface 53 of the fixed mold 50. Further, the left high-frequency induction coil 80 and the right high-frequency induction coil 100 are arranged so that the left ring portion 71 and the right ring portion 92 wound seven times in a ring shape face each other. Further, the left high-frequency induction coil 80 and the right high-frequency induction coil 100 are formed with the same inner diameter D1 and disposed on the same shaft 101 as shown in FIG.

ST03において、高周波電源により一対の高周波誘導コイルに電流を流し、固定金型及び可動金型に磁界を発生させ、固定金型及び可動金型に渦電流を発生させ、得られたジュール熱で固定金型及び可動金型を加熱する。   In ST03, a current is passed through a pair of high-frequency induction coils from a high-frequency power source, a magnetic field is generated in the fixed mold and the movable mold, eddy currents are generated in the fixed mold and the movable mold, and the obtained Joule heat is fixed. Heat the mold and the movable mold.

具体的には図4(b)に示されるように、高周波電源により左の高周波誘導コイル80及び右の高周波誘導コイル100に電流を流すと、矢印(4)、(5)のように磁界が発生する。この磁界の発生によって、固定金型50に矢印(6)のように渦電流が発生し、可動金型60に矢印(7)のように渦電流が発生する。固定金型50及び可動金型60に電気抵抗を有するため、渦電流と電気抵抗とでジュール熱が発生し、この熱で固定金型50及び可動金型60が加熱される。   Specifically, as shown in FIG. 4B, when a current is passed through the left high-frequency induction coil 80 and the right high-frequency induction coil 100 by a high-frequency power source, a magnetic field is generated as indicated by arrows (4) and (5). Occur. Due to the generation of this magnetic field, an eddy current is generated in the fixed mold 50 as indicated by an arrow (6), and an eddy current is generated in the movable mold 60 as indicated by an arrow (7). Since the fixed mold 50 and the movable mold 60 have electric resistance, Joule heat is generated by the eddy current and the electric resistance, and the fixed mold 50 and the movable mold 60 are heated by this heat.

ST04において、固定金型及び可動金型の温度が所定温度に達したとき、固定金型に可動金型を合わせて型締めする。具体的には図1において、固定金型50及び可動金型60の温度が所定温度に達したとき、型締めシリンダ23に引き動作を行わせる。型締めシリンダ23のピストンロッド108が引かれるので、固定金型50に可動金型60を合わせられて型締めが実施される。   In ST04, when the temperature of the fixed mold and the movable mold reaches a predetermined temperature, the movable mold is aligned with the fixed mold and clamped. Specifically, in FIG. 1, when the temperature of the fixed mold 50 and the movable mold 60 reaches a predetermined temperature, the clamping cylinder 23 is caused to perform a pulling operation. Since the piston rod 108 of the mold clamping cylinder 23 is pulled, the movable mold 60 is aligned with the fixed mold 50 to perform mold clamping.

ST05において、型締めした固定金型及び可動金型のキャビティに、溶融状態にある材料を注入する。具体的には図3において、固定金型50に可動金型60を型締めさせた後、固定金型50の材料注入口109から溶融状態の材料をキャビティ内に注入させる。   In ST05, a molten material is injected into the cavities of the fixed mold and the movable mold that are clamped. Specifically, in FIG. 3, after the movable mold 60 is clamped to the fixed mold 50, the molten material is injected into the cavity from the material injection port 109 of the fixed mold 50.

ST06において、キャビティで冷却固化された成形品を取出すために、固定金型から可動金型を分離させる。具体的には図5(a)に示されるように、可動金型60を固定金型50から離す。可動金型60の可動側キャビティ面61に樹脂成形品106が付着しているので、樹脂成形品106を突出しピン107で突出させる。   In ST06, in order to take out the molded product cooled and solidified in the cavity, the movable mold is separated from the fixed mold. Specifically, as shown in FIG. 5A, the movable mold 60 is separated from the fixed mold 50. Since the resin molded product 106 is attached to the movable side cavity surface 61 of the movable mold 60, the resin molded product 106 protrudes and protrudes with the pins 107.

図3において、射出成形方法は、高周波電源90、左の高周波誘導コイル80、右の高周波誘導コイル100で構成される加熱手段70を備えると共に、固定金型50及び可動金型60を備える射出成形機により実施される方法であって、加熱手段70で加熱した固定金型50及び可動金型60を用いて、成形品を得る方法である。   In FIG. 3, the injection molding method includes a heating means 70 including a high frequency power supply 90, a left high frequency induction coil 80, and a right high frequency induction coil 100, and an injection molding including a fixed mold 50 and a movable mold 60. This is a method carried out by a machine, and is a method for obtaining a molded product using the fixed mold 50 and the movable mold 60 heated by the heating means 70.

図6において、射出成形方法は、型分離状態維持工程(ST01)と、コイル配置工程(ST02)と、加熱工程(ST03)と、型締工程(ST04)と、材料注入工程(ST05)と、型開工程(ST06)と、からなる。   In FIG. 6, the injection molding method includes a mold separation state maintaining process (ST01), a coil arranging process (ST02), a heating process (ST03), a mold clamping process (ST04), a material injection process (ST05), Mold opening process (ST06).

コイル配置工程では、図4(b)に示されるように、左の高周波誘導コイル80を、可動金型60の可動方向に平行である可動金型左外側面62及び固定金型左外側面52に近接させる。また、右の高周波誘導コイル100を、可動金型60の可動方向に平行である可動金型右外側面63及び固定金型右外側面53に近接させる。さらに、リング状に7回巻付けた左リング部71と右リング部92が互いに向き合うように、左の高周波誘導コイル80と右の高周波誘導コイル100を配置させる。   In the coil placement step, as shown in FIG. 4B, the left high-frequency induction coil 80 is moved to a movable mold left outer surface 62 and a fixed mold left outer surface 52 that are parallel to the movable direction of the movable mold 60. Close to. Further, the right high frequency induction coil 100 is brought close to the movable mold right outer surface 63 and the fixed mold right outer surface 53 which are parallel to the movable direction of the movable mold 60. Further, the left high-frequency induction coil 80 and the right high-frequency induction coil 100 are arranged so that the left ring portion 71 and the right ring portion 92 wound seven times in a ring shape face each other.

すなわち、左の高周波誘導コイル80及び右の高周波誘導コイル100が、固定金型50及び可動金型60の開閉方向と平行に配置されているので、型開きの際、可動金型60が高周波誘導コイル80、100に当たる心配はない。したがって、加熱手段70で固定金型50及び可動金型60を加熱する成形方法において、より作業性を向上させることができる方法を提供できる。   That is, since the left high-frequency induction coil 80 and the right high-frequency induction coil 100 are arranged in parallel to the opening and closing directions of the fixed mold 50 and the movable mold 60, the movable mold 60 is subjected to high-frequency induction when the mold is opened. There is no worry of hitting the coils 80, 100. Therefore, in the molding method in which the fixed mold 50 and the movable mold 60 are heated by the heating means 70, a method that can further improve workability can be provided.

尚、本発明に係る成形装置は、実施の形態では射出成形機に適用したが、ダイカスト装置にも適用可能である。
加えて、本発明に係る成形方法は、実施の形態では射出成形法に適用したが、ダイカスト法にも適用可能である。
The molding apparatus according to the present invention is applied to an injection molding machine in the embodiment, but can also be applied to a die casting apparatus.
In addition, the molding method according to the present invention is applied to the injection molding method in the embodiment, but can also be applied to a die casting method.

また、本発明に係る一対の高周波誘導コイルは、実施の形態では型締め装置の左右に配置したが、型締め装置の上下に配置してもよい。
さらに、本発明に係る高周波誘導コイルの取付位置は、実施の形態では固定盤の側面としたが、可動盤の側面やベッドでもよい。また、高周波誘導コイルを、成形装置とは別に設けたロボットアームの先端に取付けてもよい。
加えて、本発明に係る高周波誘導コイルの形状は、実施の形態ではリング状(図2参照)としたが、楕円状や四角状にしてもよい。ただし、楕円の内側及び四角の内側に、固定金型と可動金型が収まるようにすることが必須である。
Moreover, although the pair of high frequency induction coils according to the present invention are arranged on the left and right of the mold clamping device in the embodiment, they may be arranged on the upper and lower sides of the mold clamping device.
Furthermore, although the attachment position of the high frequency induction coil according to the present invention is the side surface of the fixed platen in the embodiment, it may be the side surface of the movable platen or the bed. Moreover, you may attach a high frequency induction coil to the front-end | tip of the robot arm provided separately from the shaping | molding apparatus.
In addition, the shape of the high frequency induction coil according to the present invention is a ring shape (see FIG. 2) in the embodiment, but may be an elliptical shape or a square shape. However, it is essential that the fixed mold and the movable mold are accommodated inside the ellipse and inside the square.

本発明の成形技術は、射出成形技術に用いられる金型の加熱に好適である。   The molding technique of the present invention is suitable for heating a mold used in the injection molding technique.

10…成形装置(射出成形機)、50…固定金型、52…一方の外側面(固定金型左外側面)、53…他方の外側面(固定金型右外側面)、60…可動金型、62…一方の外側面(可動金型左外側面)、63…他方の外側面(可動金型右外側面)、70…加熱手段、71…リング部(左リング部)、80…高周波誘導コイル(左の高周波誘導コイル)、90…高周波電源、92…リング部(右リング部)、100…高周波誘導コイル(右の高周波誘導コイル)、106…成形品(樹脂成形品)、L1…所定寸法。   DESCRIPTION OF SYMBOLS 10 ... Molding apparatus (injection molding machine), 50 ... Fixed mold, 52 ... One outer surface (fixed mold left outer surface), 53 ... The other outer surface (fixed mold right outer surface), 60 ... Movable mold Mold 62 ... one outer surface (movable mold left outer surface), 63 ... the other outer surface (movable mold right outer surface), 70 ... heating means, 71 ... ring part (left ring part), 80 ... high frequency Induction coil (left high-frequency induction coil), 90... High-frequency power supply, 92... Ring part (right ring part), 100... High-frequency induction coil (right high-frequency induction coil), 106. Predetermined dimensions.

Claims (2)

  1. 加熱手段で加熱した一対の金型を用いて、成形品を得る成形装置において、
    前記加熱手段は、
    前記一対の金型の開閉方向に平行である前記一対の金型の一方の外側面、及び前記一対の金型の他方の外側面に近接して各々設けられ、リング状に複数回巻付けたリング部が互いに向き合っている一対の高周波誘導コイルと、
    これらの高周波誘導コイルに接続され前記高周波誘導コイルに電流を与える高周波電源と、
    からなることを特徴とする成形装置。
    In a molding apparatus for obtaining a molded product using a pair of molds heated by a heating means,
    The heating means includes
    Provided in proximity to one outer surface of the pair of molds parallel to the opening and closing direction of the pair of molds and the other outer surface of the pair of molds, and wound in a ring shape a plurality of times A pair of high-frequency induction coils with ring portions facing each other;
    A high-frequency power source connected to these high-frequency induction coils and supplying a current to the high-frequency induction coils;
    A molding apparatus comprising:
  2. 高周波電源及び一対の高周波誘導コイルで構成される加熱手段を備えると共に、固定金型及び可動金型を備える成形装置により実施される成形方法であって、
    前記加熱手段で加熱した前記固定金型及び前記可動金型を用いて、成形品を得る成形方法において、
    前記固定金型から所定寸法だけ前記可動金型を離した状態で維持する型分離状態維持工程と、
    前記可動金型の可動方向に平行である前記固定金型の一方の外側面及び前記可動金型の一方の外側面と、前記固定金型の他方の外側面及び前記可動金型の他方の外側面とに、前記一対の高周波誘導コイルを近接させ、これらの高周波誘導コイルの中でリング状に複数回巻付けたリング部が互いに向き合うように、前記一対の高周波誘導コイルを配置させるコイル配置工程と、
    前記高周波電源により前記一対の高周波誘導コイルに電流を流し、前記固定金型及び前記可動金型に磁界を発生させ、前記固定金型及び前記可動金型に渦電流を発生させ、得られたジュール熱で前記固定金型及び前記可動金型を加熱する加熱工程と、
    前記固定金型及び前記可動金型の温度が所定温度に達したとき、前記固定金型に前記可動金型を合わせて型締めする型締工程と、
    型締めした前記固定金型及び前記可動金型のキャビティに、溶融状態にある材料を注入する材料注入工程と、
    前記キャビティで冷却固化された成形品を取出すために、前記固定金型から前記可動金型を分離させる型開工程と、
    からなることを特徴とする成形方法。
    A molding method that includes a heating unit including a high-frequency power source and a pair of high-frequency induction coils, and is implemented by a molding apparatus that includes a fixed mold and a movable mold,
    In the molding method for obtaining a molded product using the fixed mold and the movable mold heated by the heating means,
    A mold separation state maintaining step for maintaining the movable mold in a state of being separated from the fixed mold by a predetermined dimension;
    One outer surface of the fixed mold and one outer surface of the movable mold that are parallel to the movable direction of the movable mold, the other outer surface of the fixed mold, and the other outer surface of the movable mold. A coil arrangement step of arranging the pair of high frequency induction coils so that the pair of high frequency induction coils are brought close to a side surface and the ring portions wound in a ring shape among these high frequency induction coils face each other. When,
    A current is passed through the pair of high-frequency induction coils by the high-frequency power source, a magnetic field is generated in the fixed mold and the movable mold, and an eddy current is generated in the fixed mold and the movable mold. A heating step of heating the fixed mold and the movable mold with heat;
    A mold clamping step of clamping the movable mold to the stationary mold when the temperature of the stationary mold and the movable mold reaches a predetermined temperature; and
    A material injection step of injecting a material in a molten state into the cavities of the fixed mold and the movable mold that are clamped;
    A mold opening step for separating the movable mold from the fixed mold in order to take out the molded product cooled and solidified in the cavity;
    A molding method comprising:
JP2010210069A 2010-09-17 2010-09-17 Molding apparatus and molding method Expired - Fee Related JP5271325B2 (en)

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