JP5495975B2 - Injection molding machine - Google Patents

Injection molding machine Download PDF

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JP5495975B2
JP5495975B2 JP2010144592A JP2010144592A JP5495975B2 JP 5495975 B2 JP5495975 B2 JP 5495975B2 JP 2010144592 A JP2010144592 A JP 2010144592A JP 2010144592 A JP2010144592 A JP 2010144592A JP 5495975 B2 JP5495975 B2 JP 5495975B2
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heat insulating
insulating cover
cover
heat
heating cylinder
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JP2012006276A (en
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聡 日比野
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Toyo Machinery and Metal Co Ltd
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Toyo Machinery and Metal Co Ltd
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Priority to JP2010144592A priority Critical patent/JP5495975B2/en
Priority to CN201180031126.XA priority patent/CN102958665B/en
Priority to PCT/JP2011/063059 priority patent/WO2011162097A1/en
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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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/74—Heating or cooling of the injection unit
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/62—Barrels or cylinders
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1782—Mounting or clamping means for heating elements or thermocouples

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

本発明は、型閉された金型のキャビティに加熱シリンダで溶融された樹脂を射出する射出成形機に関し、特に熱可塑性樹脂を溶融する加熱シリンダの外側に２重のカバーを設けた射出成形機に関する。   The present invention relates to an injection molding machine that injects a resin melted by a heating cylinder into a mold cavity, and in particular, an injection molding machine provided with a double cover outside a heating cylinder that melts a thermoplastic resin. About.

従来から用いられている一般的な射出成形機においては、加熱シリンダ内に原料である粒状の熱可塑性樹脂（ペレット）を送り、加熱シリンダ内に設けられた進退可能なスクリューにより樹脂を溶融しながらスクリュー先端のノズル側に送り出し、スクリューの先端側に設けられた射出ノズルから金型装置のキャビティに溶融樹脂を射出させ、キャビティ内で溶融樹脂を冷却させ固化させた後、金型装置を開き、突出しピンなどにより金型に張り付いている成形物を金型から外すことにより、成形体が成形されている。   In a conventional injection molding machine that has been used in the past, a granular thermoplastic resin (pellet) as a raw material is fed into a heating cylinder, and the resin is melted by a reciprocating screw provided in the heating cylinder. Sending out to the nozzle side of the screw tip, injecting molten resin from the injection nozzle provided on the screw tip side into the cavity of the mold apparatus, cooling the molten resin in the cavity and solidifying, then opening the mold apparatus, A molded product is molded by removing a molded product attached to the mold with a protruding pin or the like from the mold.

このようなプラスチックなどの成形体を成形する射出成形機においては、その構成を大別すると概ね、型締ユニットと射出ユニットから構成されており、型締ユニットにおいては、一般的に固定金型と可動金型とからなる金型が備えられており、トグル機構若しくは直圧方式などの型締を可能とする可動手段によって、固定金型に対し可動金型を進退させることで、金型の型開閉が行われる。   Such an injection molding machine that molds a molded body such as plastic is roughly composed of a mold clamping unit and an injection unit. In the mold clamping unit, a fixed mold is generally used. A mold composed of a movable mold is provided, and the mold of the mold is moved by moving the movable mold forward and backward with respect to the fixed mold by a movable means such as a toggle mechanism or a direct pressure method. Opening and closing is performed.

前述した金型の型締時に形成されるキャビティに、粒状の樹脂であるペレットを溶融樹脂として供給する際には前述した射出ユニットが用いられ、この射出ユニットには、駆動源たるモータなどの駆動手段が備えられ、モータの回転力をプーリやベルトなどを介して順次伝達させ、回転運動を直線運動に変換するボールネジ機構などにより、加熱シリンダ内のスクリューを回転させることにより溶融樹脂を搬送させながら計量を行った後、スクリューが前進されることで型締された金型のキャビティに溶融樹脂が射出される。   The above-described injection unit is used when pellets, which are granular resins, are supplied as molten resin to the cavity formed when the mold is clamped, and the injection unit is driven by a motor as a drive source. Means to transmit the rotational force of the motor sequentially via pulleys, belts, etc., while conveying the molten resin by rotating the screw in the heating cylinder by a ball screw mechanism etc. that converts the rotational motion into linear motion After the measurement, the molten resin is injected into the cavity of the mold that has been clamped as the screw is advanced.

ところで、前述した加熱シリンダには、加熱シリンダ内に供給されてきたペレットを加熱溶融するための加熱ヒータが設けられており、この加熱ヒータが加熱されることで加熱シリンダは２４０℃〜２５０℃ほどの高温に加熱されることで前述したペレットが溶融されるのだが、射出成形機の操作を行うオペレータが加熱シリンダに触れてしまい火傷してしまうことを防止したり、或いは加熱された加熱シリンダが放熱により温度低下しないよう保温したりするために、加熱シリンダの外側にはこれを囲うようにしてカバーが設けられているものがある。   By the way, the heating cylinder described above is provided with a heater for heating and melting the pellets supplied to the heating cylinder, and the heating cylinder is heated to about 240 ° C. to 250 ° C. The above-mentioned pellets are melted by being heated to a high temperature, but it is possible to prevent the operator who operates the injection molding machine from touching the heating cylinder and causing burns, or a heated heating cylinder In order to keep the temperature so as not to decrease due to heat radiation, there are some which are provided with a cover so as to surround the outside of the heating cylinder.

上記技術に関連するものとして、特許文献１には、加熱シリンダたる加熱筒の外周面にヒータを取付け、ヒータの設けられた加熱筒をカバーで囲った射出成形機が開示されている。   As related to the above technique, Patent Document 1 discloses an injection molding machine in which a heater is attached to the outer peripheral surface of a heating cylinder, which is a heating cylinder, and the heating cylinder provided with the heater is surrounded by a cover.

特開２００４−２９１５４５号公報JP 2004-291545 A

前記特許文献１における加熱筒を囲うカバーは、ヒータの発した熱が放出しないよう保温効果を得るための保温カバーであり、放熱対策を講ずることはできるにしても、ヒータの熱は保温カバーに伝達され高温になるものと考えられ、射出成形機を使用するオペレータ等が保温カバーを構成する外筒に誤って触れてしまうと保温カバーの低温対策が講じられていないため火傷を負う虞がある。また、従来、射出シリンダにカバーをネジ止めする構造としては、取付け作業性を考慮して、ネジの止められる位置はカバーの上面部に設けられているのが一般的となっているのだが、そうした場合、カバーをネジ止めするときにネジの螺合される取付部材がカバーの内側上面に有することとなるため、加熱シリンダが高温に加熱されるとカバーの上方に熱がこもって、カバー上方が極めて高温にさらされてしまうため、カバーを取り付けたネジやこのネジの螺合される取付部材が熱の影響を受け極めて高温になってしまうという問題がある。   The cover surrounding the heating cylinder in Patent Document 1 is a heat insulation cover for obtaining a heat insulation effect so that the heat generated by the heater is not released, and the heat of the heater is applied to the heat insulation cover even though a heat dissipation measure can be taken. It is considered that the temperature is high and the operator who uses the injection molding machine accidentally touches the outer cylinder constituting the heat insulation cover, so there is a risk that the heat insulation cover is not taken at low temperature and burns may occur. . In addition, conventionally, as a structure for screwing the cover to the injection cylinder, in consideration of installation workability, the position where the screw can be fixed is generally provided on the upper surface of the cover. In such a case, when the cover is screwed, a mounting member to which the screw is screwed is provided on the inner upper surface of the cover. Therefore, when the heating cylinder is heated to a high temperature, heat is accumulated above the cover, Is exposed to extremely high temperatures, and there is a problem that the screw to which the cover is attached and the attachment member to which the screw is screwed are extremely hot due to the influence of heat.

本発明は、上記課題に鑑みてなされたものであり、射出成形機に構成される加熱シリンダのその外側に設けた遮熱カバーが高温になることを可及的に抑止し、安全性の向上を図った射出成形機を提供することを目的とする。   The present invention has been made in view of the above problems, and it is possible to prevent the heat shield cover provided on the outside of the heating cylinder configured in the injection molding machine from becoming high temperature as much as possible, thereby improving safety. It aims at providing the injection molding machine which aimed at.

請求項１に係る射出成形機は、
内部にスクリューが設けられると共に外周に加熱ヒータの装着された筒状の加熱シリンダと、該加熱シリンダの先端に装着され金型のキャビティに溶融樹脂を射出する射出ノズルと、前記加熱シリンダの外側を囲む２重カバーとを備えた射出成形機において、
前記２重カバーは保温カバーとその外側に設けられた遮熱カバーとからなり、
前記加熱シリンダに前記保温カバーを接合する保温カバー取付部よりも、前記保温カバーに前記遮熱カバーを接合する遮熱カバー取付部を低位置に配設したことを特徴とする。 An injection molding machine according to claim 1 is:
A cylindrical heating cylinder provided with a screw inside and a heater mounted on the outer periphery, an injection nozzle attached to the tip of the heating cylinder for injecting molten resin into a mold cavity, and an outside of the heating cylinder In an injection molding machine with a surrounding double cover,
The double cover is composed of a heat insulating cover and a heat insulating cover provided on the outside thereof.
A heat shield cover attaching portion for joining the heat shield cover to the heat retaining cover is disposed at a lower position than a heat retaining cover attaching portion for joining the heat retaining cover to the heating cylinder.

請求項２に係る射出成形機は、請求項１において、
前記保温カバーは、前記加熱シリンダの上方に水平に設けられた保温カバー上面部と、前記加熱シリンダの側方に垂直に設けられた保温カバー垂直面部と、前記保温カバー上面部と前記保温カバー垂直面部とを一体に連結する傾斜状の保温カバー傾斜部とを有し、
前記保温カバー取付部により前記加熱シリンダと前記保温カバー傾斜部とを接合し、
前記遮熱カバー取付部により前記保温カバー垂直面部と前記遮熱カバーとを接合したことを特徴とする。 An injection molding machine according to claim 2 is the method according to claim 1,
The heat insulating cover includes a heat insulating cover upper surface portion provided horizontally above the heating cylinder, a heat insulating cover vertical surface portion provided vertically to a side of the heating cylinder, the heat insulating cover upper surface portion, and the heat insulating cover vertical. An inclined heat insulating cover inclined portion that integrally connects the surface portion,
The heating cylinder and the heat insulating cover inclined portion are joined by the heat insulating cover attaching portion,
The heat insulating cover vertical surface portion and the heat insulating cover are joined by the heat insulating cover attaching portion.

請求項３に係る射出成形機は、請求項２において、
前記遮熱カバーを角筒型に形成し、前記保温カバー垂直面部と、前記遮熱カバーに形成した遮熱カバー垂直面部又はそれよりも下方の遮熱カバーの部位とを、前記遮熱カバー取付部により接合したことを特徴とする。 An injection molding machine according to a third aspect is the invention according to the second aspect,
The heat insulating cover is formed in a square tube shape, and the heat insulating cover vertical surface portion and the heat insulating cover vertical surface portion formed on the heat insulating cover or a portion of the heat insulating cover below the heat insulating cover are attached to the heat insulating cover. It is characterized by being joined by a part.

請求項４に係る射出成形機は、請求項１〜３の何れか１項において、
前記加熱シリンダにはその外周に取付ブラケットがまき付けて取り付けられており、該加熱シリンダに構成された取付ブラケットに前記保温カバー取付部を一体に設けたことを特徴とする。 An injection molding machine according to claim 4 is the method according to any one of claims 1 to 3,
A mounting bracket is attached to the outer periphery of the heating cylinder, and the heat retaining cover mounting portion is integrally provided on the mounting bracket formed on the heating cylinder.

請求項５に係る射出成形機は、請求項１〜４の何れか１項において、
前記遮熱カバーの表面に断熱塗料を塗布したことを特徴とする。 The injection molding machine according to claim 5 is any one of claims 1 to 4,
A heat insulating paint is applied to the surface of the heat shield cover.

本発明によれば、加熱ヒータの加熱より加熱シリンダの全体が高温に加熱されると、加熱シリンダからの輻射熱以外に、加熱シリンダが発する熱が、加熱シリンダから、保温カバー取付部、保温カバー、遮熱カバー取付部、遮熱カバーへと直接的に伝達（伝導熱）されてゆく。そのような状態のときには、特に保温カバーの内側上方には放熱された熱がこもるため、カバー内では下方よりも上面が高温になるという現象が起こるのだが、加熱シリンダから保温カバー取付部を通じて保温カバーに伝達され、さらに保温カバーから遮熱カバー取付部を通じて遮熱カバーに伝達される熱伝達経路の距離を確保し、加熱シリンダから各種部品（保温カバー取付部、保温カバー、遮熱カバー取付部）を通じて遮熱カバーに伝達される伝導熱を伝わり難くし、遮熱カバーが高温にならないようにするために、遮熱カバー取付部と保温カバー取付部との配置関係が同一線上に配置されないよう保温カバー取付部よりも低い位置に遮熱カバー取付部２７を配置したから、遮熱カバーが加熱シリンダからの伝導熱により高温になることを可及的に抑えることができる。よって、例えば保温カバー取付部と遮熱カバー取付部との配置関係が同一線上に配置されているような場合には、加熱シリンダから遮熱カバーへ伝達される熱伝達経路が直線的となり距離が短くなるために、加熱シリンダの熱が遮熱カバーへ直接的に伝達されやすく遮熱カバーは高温になってしまうが、そのような問題を解消することが可能となるから、ひいては、オペレータが遮熱カバーに誤って触れてしまい火傷等を負うことを防止できるので安全性に優れたものとなる。   According to the present invention, when the entire heating cylinder is heated to a higher temperature than the heating heater, in addition to the radiant heat from the heating cylinder, the heat generated by the heating cylinder is changed from the heating cylinder to the heat retaining cover mounting portion, the heat retaining cover, It is transmitted (conducted heat) directly to the heat shield cover mounting part and heat shield cover. In such a state, the heat dissipated in the upper part of the inside of the heat insulation cover is trapped, so that the upper surface of the cover becomes hotter than the lower part. The distance of the heat transfer path that is transmitted to the cover and further transferred from the heat insulation cover to the heat insulation cover through the heat insulation cover attachment is secured, and various parts (heat insulation cover attachment, heat insulation cover, heat insulation cover attachment) from the heating cylinder In order to prevent conduction heat transmitted to the heat shield cover through and prevent the heat shield cover from reaching a high temperature, the arrangement relationship between the heat shield cover mounting portion and the heat insulation cover mounting portion should not be placed on the same line. Since the heat shield cover mounting portion 27 is disposed at a position lower than the heat insulation cover mounting portion, the heat shield cover is heated by the conduction heat from the heating cylinder. It is possible to suppress as much as possible. Therefore, for example, when the arrangement relationship between the heat insulation cover attachment part and the heat insulation cover attachment part is arranged on the same line, the heat transfer path transmitted from the heating cylinder to the heat insulation cover becomes linear and the distance becomes long. This shortens the temperature of the heating cylinder, which is easily transferred directly to the heat shield cover, and the heat shield cover becomes hot. However, such a problem can be solved, so that the operator can interrupt the heat shield. Since it can prevent accidentally touching the thermal cover and causing burns, etc., it is excellent in safety.

さらに、保温カバーは、加熱シリンダの上方に水平に設けられた保温カバー上面部と、加熱シリンダの側方に垂直に設けられた保温カバー垂直面部と、保温カバー上面部と保温カバー垂直面部とを一体に連結する傾斜状の保温カバー傾斜部とを有しており、加熱シリンダと保温カバー傾斜部とを接合する取付ブラケットに設けた保温カバー取付部の一端は、保温カバー上面部ではなく保温カバー傾斜部に接合されているから、保温カバーの上方（保温カバー上面部の内側上部）に熱がこもったときに、保温カバー取付部はそのこもった高温の熱の影響を受け難くなる。よって、保温カバーの上方の高温の熱が各種部品を介して遮熱カバーに伝達され、遮熱カバーが高温になってしまうことを可及的に抑えることができる。しかも、保温カバー垂直面部と、遮熱カバーの遮熱カバー垂直面部（又は、遮熱カバーの遮熱カバー垂直面部よりも下方の部位）とを接合する遮熱カバー取付部は、保温カバーにこもった高温の熱の影響を受け難い、保温カバー取付部より低位置に配置されていることから、遮熱カバーが高温になってしまうことを可及的に抑えることができる。   Furthermore, the heat insulation cover includes a heat insulation cover upper surface portion provided horizontally above the heating cylinder, a heat insulation cover vertical surface portion provided vertically to the side of the heating cylinder, a heat insulation cover upper surface portion, and a heat insulation cover vertical surface portion. The heat insulating cover mounting portion provided on the mounting bracket for joining the heating cylinder and the heat insulating cover inclined portion is not the upper surface portion of the heat insulating cover but the heat insulating cover. Since it is joined to the inclined portion, when the heat is accumulated above the heat insulation cover (the upper part inside the heat insulation cover upper surface portion), the heat insulation cover mounting portion is not easily affected by the high temperature heat. Therefore, it is possible to suppress as much as possible that the high-temperature heat above the heat insulation cover is transmitted to the heat insulation cover via various components and the heat insulation cover becomes high temperature. In addition, the heat insulating cover mounting portion that joins the heat insulating cover vertical surface portion and the heat insulating cover vertical surface portion of the heat insulating cover (or the portion below the heat insulating cover vertical surface portion of the heat insulating cover) is covered with the heat insulating cover. In addition, since the heat shield cover is disposed at a lower position than the heat retaining cover mounting portion and is not easily affected by high temperature heat, it is possible to suppress the heat shield cover from becoming high temperature as much as possible.

さらに、前記遮熱カバーの表面に断熱塗料を塗布したから、遮熱カバーがより高温になることのないよう抑止することができる。   Furthermore, since the heat insulating paint is applied to the surface of the heat shield cover, the heat shield cover can be prevented from becoming higher temperature.

本発明の一例の射出成形機を示す構成図である。It is a block diagram which shows the injection molding machine of an example of this invention. 射出成形機に構成される射出ユニットを示す構成図である。It is a block diagram which shows the injection unit comprised in an injection molding machine. 遮熱カバーを取り外した状態の射出ユニットを示す構成図である。It is a block diagram which shows the injection unit of the state which removed the heat shield cover. 遮熱カバーと保温カバーを取り外した状態の射出ユニットを示す構成図である。It is a block diagram which shows the injection unit of the state which removed the heat shield cover and the heat retention cover. 射出ユニットの要部を示すＡ−Ａ線断面図である。It is an AA line sectional view showing the important section of an injection unit. 射出ユニットの要部を示すＢ−Ｂ線断面図である。It is BB sectional drawing which shows the principal part of an injection unit.

以下、本発明の実施形態を図１〜図６により以下に説明する。もちろん、本発明は、その発明の趣旨に反しない範囲で、実施形態において説明した以外の構成のものに対しても容易に適用可能なことは説明を要するまでもない。   Hereinafter, embodiments of the present invention will be described with reference to FIGS. Of course, it goes without saying that the present invention can be easily applied to configurations other than those described in the embodiments without departing from the spirit of the invention.

図１に示すように、本発明の一例の射出成形機１は機台２を備え、この機台２上に射出ユニット３、型締ユニット４が配設されている。   As shown in FIG. 1, an injection molding machine 1 according to an example of the present invention includes a machine base 2, and an injection unit 3 and a mold clamping unit 4 are disposed on the machine base 2.

型締ユニット４には、固定金型５に対し可動金型６を前進後退させ型締（型閉）及び型開を行う型開閉機構を備えており、本実施形態における型開閉機構としては、モータの駆動力を駆動源としてトグルリンク機構７を屈曲作動することで、固定ダイプレート８に固定された固定金型５に対して可動ダイプレート９に固定された可動金型６を繰り返し型開閉する。   The mold clamping unit 4 includes a mold opening / closing mechanism that moves the movable mold 6 forward and backward with respect to the fixed mold 5 to perform mold clamping (mold closing) and mold opening. As the mold opening / closing mechanism in the present embodiment, The toggle link mechanism 7 is bent using the driving force of the motor as a drive source, so that the movable mold 6 fixed to the movable die plate 9 is repeatedly opened and closed with respect to the fixed mold 5 fixed to the fixed die plate 8. To do.

また、射出ユニット３には、筒型の加熱シリンダ１０、加熱シリンダ１０の先端に装着した射出ノズル１１、加熱シリンダ１０の内部に回転可能に設けられたスクリュー１２、原料である粒状の樹脂（ペレット）が投入されるホッパ１４、ホッパ１４が設けられたホッパブロック１５等が構成されており、加熱シリンダ１０の内部に設けられたスクリュー１２が回転されると、加熱シリンダ１０の後部へ供給された樹脂は射出ノズル１１の設けられた加熱シリンダ１０の先端側へ送り出すようになっており、加熱シリンダ１０内に供給されてこの加熱シリンダ１０内で加熱された溶融樹脂は、図示しない、計量用モータ等からなる回転駆動手段によりスクリュー１２が回転されることにより計量された後、図示しない、射出用モータ、ボールネジ機構等からなる進退駆動手段によりスクリュー１２が前進されることで金型のキャビティへ所定量の溶融樹脂が射出される。なお、後述する２重カバーの内側に配置されている加熱シリンダ１０の外周には、図２及び図３に示すように加熱ヒータ１６が４つ所定間隔を空けて巻き付けられており、加熱ヒータ１６が高温に加熱されることで、加熱シリンダ１０の内部に供給された樹脂が溶融される。   The injection unit 3 includes a cylindrical heating cylinder 10, an injection nozzle 11 attached to the tip of the heating cylinder 10, a screw 12 rotatably provided inside the heating cylinder 10, and a granular resin (pellet) as a raw material. ) 14 and the hopper block 15 provided with the hopper 14 are configured. When the screw 12 provided inside the heating cylinder 10 is rotated, the hopper 14 is supplied to the rear portion of the heating cylinder 10. Resin is sent out to the front end side of the heating cylinder 10 provided with the injection nozzle 11, and the molten resin supplied into the heating cylinder 10 and heated in the heating cylinder 10 is not shown in the figure. An injection motor and a ball (not shown) are measured after the screw 12 is measured by being rotated by a rotational drive means such as A predetermined amount of molten resin into the mold cavity by the screw 12 is advanced by the advancing drive means consisting of di mechanism or the like is emitted. Note that four heaters 16 are wound around the outer periphery of the heating cylinder 10 disposed inside the double cover, which will be described later, with a predetermined interval as shown in FIGS. 2 and 3. Is heated to a high temperature, so that the resin supplied into the heating cylinder 10 is melted.

加熱シリンダ１０について図２〜図６に基づきさらに説明すると、前述したように加熱シリンダ１０の外周には、前述したように加熱ヒータ１６が４つ所定間隔を空けて巻き付けられているのだが、射出ノズル側に位置する２つの加熱ヒータ１６の間には、図５に示すように、上下に対をなす略円弧状の取付ブラケット１７がネジ止めされている。   The heating cylinder 10 will be further described with reference to FIGS. 2 to 6. As described above, the four heaters 16 are wound around the outer periphery of the heating cylinder 10 at a predetermined interval as described above. Between the two heaters 16 located on the nozzle side, as shown in FIG. 5, a substantially arcuate mounting bracket 17 that is paired up and down is screwed.

加熱シリンダ１０の外周にネジ止めされた取付ブラケット１７には、放射状に突出した保温カバー取付部１８が一体に設けられており、保温カバー取付部１８により加熱シリンダ１０と保温カバー１９とが接合され、加熱シリンダ１０を囲いこの加熱シリンダ１０を保温するための保温カバー１９は、保温カバー取付部１８の一端（先端）にネジ止めされ固定されている。   The mounting bracket 17 screwed to the outer periphery of the heating cylinder 10 is integrally provided with a heat insulating cover mounting portion 18 projecting radially, and the heating cylinder 10 and the heat insulating cover 19 are joined by the heat insulating cover mounting portion 18. The heat retaining cover 19 that surrounds the heating cylinder 10 and retains the temperature of the heating cylinder 10 is screwed and fixed to one end (tip) of the heat retaining cover mounting portion 18.

前記保温カバー１９は、加熱シリンダ１０の上方に水平に設けられた保温カバー上面部２０と、加熱シリンダ１０の側方に垂直に設けられた保温カバー垂直面部２１と、保温カバー上面部２０と保温カバー垂直面部２１とを一体に連結する傾斜状の保温カバー傾斜部２２とを構成し、下方には開口部を有しており、保温カバー取付部１８の一端は、保温カバー上面部２０ではなく、それよりも低位置である保温カバー傾斜部２２に接合されている。   The heat insulation cover 19 includes a heat insulation cover upper surface portion 20 provided horizontally above the heating cylinder 10, a heat insulation cover vertical surface portion 21 provided vertically to the side of the heating cylinder 10, and a heat insulation cover upper surface portion 20. An inclined heat insulating cover inclined portion 22 that integrally connects the cover vertical surface portion 21 is formed, and has an opening below, and one end of the heat insulating cover mounting portion 18 is not the heat insulating cover upper surface portion 20. It is joined to the heat insulation cover inclined part 22 which is lower than that.

また、保温カバー１９の外側には、加熱シリンダ１０のほか保温カバー１９をさらに囲った筒型の遮熱カバー２５が配設されている。本実施形態における遮熱カバー２５は、６角形からなる角筒型となっており、保温カバー１９の保温カバー垂直部２１に対向して配置された遮熱カバー垂直面部２６を有しており、この遮熱カバー垂直面部２６の内側面と保温カバー垂直面部２１の外側面とが遮熱カバー２５の内側面に一体に形成された遮熱カバー取付部２７により接合され、この遮熱カバー取付部２７を用いて、保温カバー垂直面部２１に対し遮熱カバー２５がネジ止めにより固定されている。なお、本実施形態においては、遮熱カバー取付部２７は遮熱カバー垂直面部２６に形成されているが、遮熱カバー垂直面部２６よりも下方の部位に形成してもよい。   In addition to the heating cylinder 10, a cylindrical heat shield cover 25 that further surrounds the heat retaining cover 19 is disposed outside the heat retaining cover 19. The heat insulating cover 25 in the present embodiment is a hexagonal rectangular tube shape, and has a heat insulating cover vertical surface portion 26 arranged to face the heat insulating cover vertical portion 21 of the heat insulating cover 19, The inner side surface of the heat shield cover vertical surface portion 26 and the outer surface of the heat insulation cover vertical surface portion 21 are joined together by a heat shield cover mounting portion 27 formed integrally with the inner side surface of the heat shield cover 25, and this heat shield cover mounting portion. 27, the heat insulating cover 25 is fixed to the heat insulating cover vertical surface portion 21 by screws. In the present embodiment, the heat shield cover mounting portion 27 is formed on the heat shield cover vertical surface portion 26, but may be formed on a portion below the heat shield cover vertical surface portion 26.

以上のような本実施形態における射出成形機１によれば、内部にスクリュー１２が設けられると共に外周に加熱ヒータ１６の装着された筒状の加熱シリンダ１０と、加熱シリンダ１０の先端に装着され、金型のキャビティに溶融樹脂を射出する射出ノズル１１と、加熱シリンダ１０の外側を囲む２重カバーとを備え、この２重カバーは、保温カバー１９とその外側に設けられた遮熱カバー２５とからなり、加熱シリンダ１０に前記保温カバー１９を接合する保温カバー傾斜部２２に一端が接合された保温カバー取付部１８よりも、保温カバー１９に遮熱カバー２５を接合した遮熱カバー垂直面部２６に形成した遮熱カバー取付部２７を低位置に配設している。これにより、加熱ヒータ１６の加熱よりこの加熱ヒータ１６を構成する加熱シリンダ１０の全体が、射出成形機１の可動に伴い高温に加熱されると、加熱シリンダ１０からの輻射熱以外に、加熱シリンダ１０が発する熱が、加熱シリンダ１０から、保温カバー取付部１８、保温カバー１９、遮熱カバー取付部２７、遮熱カバー２５へと直接的に伝達（伝導熱）されてゆくのだが、そのような状態のとき、特に保温カバー１９の内側上方には放熱された熱がこもるため、カバー内では下方よりも上面が高温になるという現象が起こるのだが、加熱シリンダ１０から保温カバー取付部１８を通じて保温カバー１９に伝達され、さらに保温カバー１９から遮熱カバー取付部２７を通じて遮熱カバー２５に伝達される熱伝達経路（図５に示す矢印）の距離を確保し、加熱シリンダ１０から各種部品（保温カバー取付部１８、保温カバー１９、遮熱カバー取付部２７）を通じて遮熱カバー２５に伝達される伝導熱を伝わり難くし、遮熱カバー２５が比較的高温にならないようにするため、遮熱カバー取付部２７と保温カバー取付部１８との配置関係が同一線上に配置されないよう、保温カバー上面部２０よりも低い位置に配置された保温カバー取付部１８よりもさらに低い位置に遮熱カバー取付部２７を配置したから、加熱シリンダ１０からの伝導熱により遮熱カバー２５が極めて高温になることを可及的に抑えることができる。よって、例えば保温カバー取付部１８と遮熱カバー取付部２７との配置関係が同一線上に配置されているような場合には、加熱シリンダ１０から遮熱カバー２５へ伝達される熱伝達経路が直線的となり距離が短くなるために、加熱シリンダ１０の熱が遮熱カバー２５へ直接的に伝達されやすく遮熱カバー２５は高温になってしまうが、そのような問題を解消することが可能となる。従って、オペレータが外部に露出した遮熱カバー２５に誤って触れてしまい火傷等を負うことを防止できるので、安全性に優れたものとなる。   According to the injection molding machine 1 in the present embodiment as described above, the screw 12 is provided inside, the cylindrical heating cylinder 10 having the heater 16 attached to the outer periphery, and the tip of the heating cylinder 10 is attached. An injection nozzle 11 for injecting molten resin into a cavity of a mold and a double cover surrounding the outside of the heating cylinder 10 are provided. The double cover includes a heat insulating cover 19 and a heat shield cover 25 provided on the outside thereof. The heat insulation cover vertical surface portion 26 in which the heat insulation cover 25 is joined to the heat insulation cover 19 rather than the heat insulation cover attachment portion 18 in which one end is joined to the heat insulation cover inclined portion 22 that joins the heat insulation cover 19 to the heating cylinder 10. The heat shield cover attaching portion 27 formed in the above is disposed at a low position. Thus, when the entire heating cylinder 10 constituting the heating heater 16 is heated to a high temperature by the movement of the injection molding machine 1 by the heating of the heating heater 16, in addition to the radiant heat from the heating cylinder 10, the heating cylinder 10. The heat generated from the heating cylinder 10 is directly transmitted (conducted heat) from the heating cylinder 10 to the heat insulation cover attachment portion 18, the heat insulation cover 19, the heat insulation cover attachment portion 27, and the heat insulation cover 25. In this state, the heat dissipated in the upper part of the inside of the heat insulation cover 19 is trapped, so that the upper surface of the cover becomes hotter than the lower part. However, the heat insulation from the heating cylinder 10 through the heat insulation cover attaching part 18 occurs. Of the heat transfer path (arrow shown in FIG. 5) transmitted to the cover 19 and further transmitted from the heat insulating cover 19 to the heat shield cover 25 through the heat shield cover mounting portion 27. The heat insulation cover 25 is made difficult to transmit the conduction heat transmitted from the heating cylinder 10 to the heat insulation cover 25 through various parts (the heat insulation cover attachment portion 18, the heat insulation cover 19, and the heat insulation cover attachment portion 27). In order to prevent the temperature from becoming relatively high, the heat insulating cover is disposed at a position lower than the heat insulating cover upper surface portion 20 so that the arrangement relationship between the heat insulating cover attaching portion 27 and the heat insulating cover attaching portion 18 is not arranged on the same line. Since the heat shield cover mounting portion 27 is disposed at a position lower than the portion 18, it is possible to suppress the heat shield cover 25 from becoming extremely high temperature due to the conduction heat from the heating cylinder 10 as much as possible. Therefore, for example, when the arrangement relationship between the heat insulating cover attaching portion 18 and the heat insulating cover attaching portion 27 is arranged on the same line, the heat transfer path transmitted from the heating cylinder 10 to the heat insulating cover 25 is a straight line. Since the distance becomes shorter and the heat of the heating cylinder 10 is easily transferred directly to the heat shield cover 25, the heat shield cover 25 becomes high temperature. However, such a problem can be solved. . Accordingly, it is possible to prevent the operator from accidentally touching the heat shield cover 25 exposed to the outside and causing a burn or the like, so that the safety is excellent.

さらに、保温カバー１９は、加熱シリンダ１０の上方に水平に設けられた保温カバー上面部２０と、加熱シリンダ１０の側方に垂直に設けられた保温カバー垂直面部２１と、保温カバー上面部２０と保温カバー垂直面部２１とを一体に連結する傾斜状の保温カバー傾斜部２２とを有しており、加熱シリンダ１０と保温カバー傾斜部２２とを接合する取付ブラケット１７に設けた保温カバー取付部１８の一端は、保温カバー上面部２０ではなく保温カバー傾斜部２２に接合されているから、保温カバー１９の上方（保温カバー上面部の内側上部）に熱がこもったときに、保温カバー取付部１８はそのこもった高温の熱の影響を受け難くなる。よって、保温カバー取付部１８は高温になり難く、保温カバー１９の上方の高温の熱が前記各種部品を介して遮熱カバー２５に伝達され、遮熱カバー２５が高温になってしまうことを可及的に抑えることができる。しかも、保温カバー垂直面部２１と、遮熱カバー２５の遮熱カバー垂直面部（又は、遮熱カバー２５の遮熱カバー垂直面部２６よりも下方の部位）２６とを接合する遮熱カバー取付部２７は、保温カバー１９にこもった高温の熱の影響を受け難い、保温カバー取付部１８より低位置に配置されていることから、遮熱カバー２５が高温になってしまうことを可及的に抑えることができる。   Furthermore, the heat insulation cover 19 includes a heat insulation cover upper surface portion 20 provided horizontally above the heating cylinder 10, a heat insulation cover vertical surface portion 21 provided vertically to the side of the heating cylinder 10, and a heat insulation cover upper surface portion 20. The heat insulating cover attaching portion 18 is provided with an inclined heat insulating cover inclined portion 22 that integrally connects the heat insulating cover vertical surface portion 21, and provided on the attachment bracket 17 that joins the heating cylinder 10 and the heat insulating cover inclined portion 22. Is not joined to the heat insulating cover upper surface portion 20 but to the heat insulating cover inclined portion 22, so when the heat is trapped above the heat insulating cover 19 (inside the upper portion of the heat insulating cover upper surface portion), the heat insulating cover mounting portion 18. Is less susceptible to the effects of such hot heat. Therefore, it is difficult for the heat insulating cover mounting portion 18 to reach a high temperature, and high temperature heat above the heat insulating cover 19 is transmitted to the heat insulating cover 25 via the various parts, and the heat insulating cover 25 can be heated to a high temperature. It can be suppressed as much as possible. In addition, the heat insulating cover mounting portion 27 that joins the heat insulating cover vertical surface portion 21 and the heat insulating cover vertical surface portion 26 of the heat insulating cover 25 (or a portion below the heat insulating cover vertical surface portion 26 of the heat insulating cover 25). Is less affected by the high temperature heat confined in the heat insulating cover 19, and is disposed at a lower position than the heat insulating cover mounting portion 18, so that the heat insulating cover 25 is prevented from becoming hot as much as possible. be able to.

さらに、前記遮熱カバー２５の表面にセラミック粒を含む断熱塗料（図示せず）を塗布したから、遮熱カバー２５がより高温になることのないよう抑止することができ、より一層安全性を向上することが可能となる。   Furthermore, since a heat insulating paint (not shown) containing ceramic particles is applied to the surface of the heat shield cover 25, the heat shield cover 25 can be prevented from becoming higher in temperature, thereby further improving safety. It becomes possible to improve.

以上、本実施形態の一例を詳述したが、本発明は、前記実施形態に限定されるものではなく、本発明の要旨の範囲内で種々の変形実施が可能である。例えば、本実施形態においては、断熱塗料を遮熱カバー２５の表面全体に亘って塗布しているが、これに限らず遮熱カバー２５と保温カバー１９の両者に断熱塗料を塗布してもよく、適宜選定してもよい。   As mentioned above, although an example of this embodiment was explained in full detail, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the present embodiment, the heat insulating paint is applied over the entire surface of the heat insulating cover 25, but not limited to this, the heat insulating paint may be applied to both the heat insulating cover 25 and the heat insulating cover 19. , May be selected as appropriate.

１ 射出成形機
５ 固定金型（金型）
６ 可動金型（金型）
１０ 加熱シリンダ
１１ 射出ノズル
１２ スクリュー
１６ 加熱ヒータ
１７ 取付ブラケット
１８ 保温カバー取付部
１９ 保温カバー
２０ 保温カバー上面部
２１ 保温カバー垂直面部
２２ 保温カバー傾斜部
２５ 遮熱カバー
２６ 遮熱カバー垂直面部
２７ 遮熱カバー取付部 1 Injection molding machine 5 Fixed mold (mold)
6 Movable mold (mold)
DESCRIPTION OF SYMBOLS 10 Heating cylinder 11 Injection nozzle 12 Screw 16 Heater 17 Mounting bracket 18 Insulation cover attachment part 19 Insulation cover 20 Insulation cover upper surface part 21 Insulation cover vertical part 22 Insulation cover inclination part 25 Insulation cover 26 Insulation cover perpendicular part 27 Insulation Cover attachment

Claims (5)

内部にスクリューが設けられると共に外周に加熱ヒータの装着された筒状の加熱シリンダと、該加熱シリンダの先端に装着され金型のキャビティに溶融樹脂を射出する射出ノズルと、前記加熱シリンダの外側を囲む２重カバーとを備えた射出成形機において、
前記２重カバーは保温カバーとその外側に設けられた遮熱カバーとからなり、
前記加熱シリンダに前記保温カバーを接合する保温カバー取付部よりも、前記保温カバーに前記遮熱カバーを接合する遮熱カバー取付部を低位置に配設したことを特徴とする射出成形機。 A cylindrical heating cylinder provided with a screw inside and a heater mounted on the outer periphery, an injection nozzle attached to the tip of the heating cylinder for injecting molten resin into a mold cavity, and an outside of the heating cylinder In an injection molding machine with a surrounding double cover,
The double cover is composed of a heat insulating cover and a heat insulating cover provided on the outside thereof.
An injection molding machine, wherein a heat insulating cover attaching portion for joining the heat insulating cover to the heat insulating cover is disposed at a lower position than a heat insulating cover attaching portion for joining the heat insulating cover to the heating cylinder. 前記保温カバーは、前記加熱シリンダの上方に水平に設けられた保温カバー上面部と、前記加熱シリンダの側方に垂直に設けられた保温カバー垂直面部と、前記保温カバー上面部と前記保温カバー垂直面部とを一体に連結する傾斜状の保温カバー傾斜部とを有し、
前記保温カバー取付部により前記加熱シリンダと前記保温カバー傾斜部とを接合し、
前記遮熱カバー取付部により前記保温カバー垂直面部と前記遮熱カバーとを接合したことを特徴とする請求項１に記載の射出成形機。 The heat insulating cover includes a heat insulating cover upper surface portion provided horizontally above the heating cylinder, a heat insulating cover vertical surface portion provided vertically to a side of the heating cylinder, the heat insulating cover upper surface portion, and the heat insulating cover vertical. An inclined heat insulating cover inclined portion that integrally connects the surface portion,
The heating cylinder and the heat insulating cover inclined portion are joined by the heat insulating cover attaching portion,
The injection molding machine according to claim 1, wherein the heat insulating cover vertical surface portion and the heat insulating cover are joined by the heat insulating cover attaching portion. 前記遮熱カバーを角筒型に形成し、前記保温カバー垂直面部と、前記遮熱カバーに形成した遮熱カバー垂直面部又はそれよりも下方の遮熱カバーの部位とを、前記遮熱カバー取付部により接合したことを特徴とする請求項２に記載の射出成形機。   The heat insulating cover is formed in a square tube shape, and the heat insulating cover vertical surface portion and the heat insulating cover vertical surface portion formed on the heat insulating cover or a portion of the heat insulating cover below the heat insulating cover are attached to the heat insulating cover. The injection molding machine according to claim 2, wherein the injection molding machine is joined by a portion. 前記加熱シリンダにはその外周に取付ブラケットがまき付けて取り付けられており、該加熱シリンダに構成された取付ブラケットに前記保温カバー取付部を一体に設けたことを特徴とする請求項１〜３の何れか１項に記載の射出成形機。   The heating cylinder has a mounting bracket attached to the outer periphery thereof, and the heat retaining cover mounting portion is integrally provided on the mounting bracket formed on the heating cylinder. The injection molding machine according to any one of the above. 前記遮熱カバーの表面に断熱塗料を塗布したことを特徴とする請求項１〜４の何れか１項に記載の射出成形機。   The injection molding machine according to any one of claims 1 to 4, wherein a heat insulating paint is applied to a surface of the heat shield cover.
JP2010144592A 2010-06-25 2010-06-25 Injection molding machine Expired - Fee Related JP5495975B2 (en)

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KR101944343B1 (en) * 2017-04-12 2019-04-17 주식회사 썸타지 Sealed insulation cover of injection molding machine

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