JPH07276437A - Injection molding device - Google Patents
Injection molding deviceInfo
- Publication number
- JPH07276437A JPH07276437A JP9545394A JP9545394A JPH07276437A JP H07276437 A JPH07276437 A JP H07276437A JP 9545394 A JP9545394 A JP 9545394A JP 9545394 A JP9545394 A JP 9545394A JP H07276437 A JPH07276437 A JP H07276437A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- pin
- gate
- fixed
- movable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 11
- 239000011347 resin Substances 0.000 abstract description 24
- 229920005989 resin Polymers 0.000 abstract description 24
- 238000000465 moulding Methods 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 238000012805 post-processing Methods 0.000 abstract description 2
- 230000001788 irregular Effects 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 10
- 239000000758 substrate Substances 0.000 description 10
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 208000015943 Coeliac disease Diseases 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/28—Closure devices therefor
- B29C45/2896—Closure devices therefor extending in or through the mould cavity, e.g. valves mounted opposite the sprue channel
-
- 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/28—Closure devices therefor
- B29C45/2806—Closure devices therefor consisting of needle valve systems
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、光ディスク或いは光磁
気ディスクなどのディスク基板のような中心軸穴、その
他中央開口部のある成形品を成形するための射出成形装
置、特に成形時に発生するスプルー、並びにランナーを
なくした状態で製品化できるよう改良された射出成形装
置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding apparatus for molding a molded product having a central axis hole such as a disk substrate such as an optical disk or a magneto-optical disk, and a central opening, and in particular, a sprue generated during molding. The present invention also relates to an injection molding apparatus improved so that it can be commercialized without the runner.
【０００２】[0002]
【従来の技術】従来、中心軸穴等の開口部のある成形品
は、金型も構造上キャビティに溶融樹脂を注入するゲー
トは、中心軸穴等開口部を避けて通常数点ゲートで設け
るか、ディスク基板のような場合、中心軸穴等開口部を
使用してディスクゲートを設け、後で軸穴等開口部を機
械加工で製作する方法が主流であって、この形態で生産
されていることが多い。2. Description of the Related Art Conventionally, in a molded product having an opening such as a central shaft hole, a mold is structurally provided with a gate for injecting a molten resin into a cavity by normally providing a gate at several points avoiding the opening such as the central shaft hole. Alternatively, in the case of a disk substrate, a method in which a disk gate is provided by using an opening such as a central shaft hole and then the opening such as a shaft hole is machined is a mainstream method. Often
【０００３】[0003]
【発明が解決しようとする課題】ところが、この中心軸
穴等開口部を避けて数点ゲートを設けた場合では、その
成形品が、ギア，光学ディスクなど真円度等の寸法精度
を要求される場合、或いは樹脂の合流部であるウエルド
の存在が許されない場合は使用出来ない。このため、デ
ィスク基板の成形に多用されているディスクゲートで
は、寸法精度は数点ゲートより向上し、ウエルドも発生
しないが、機械加工の工程が増え加工コストが上昇する
欠点があった。また、ディスクゲートの代わりに中心軸
穴等開口部より樹脂を注入するホットランナーの事例、
例えば図５のように成形品Ｃのためのゲートを開閉の動
作をする摺動可能なピンＡが同時に中心軸を形成する構
造では、そのピンＡが金型の可動側の穴部Ｂに金型の開
閉動作毎に嵌合させなければならない。一方、金型でピ
ンのある固定側と嵌合穴Ｂのある可動側は、それぞれ成
形機の固定プラテン，可動プラテンに固定され、金型開
閉時にその芯が精度良く一致する事は非常に困難であ
る。よって、ピンＡ或いは嵌合穴Ｂの摩耗，カジリが発
生して問題があり、また図６のように成形品Ｃのための
ゲートを開閉する金型固定側の摺動可能なピンＡが、金
型可動側の嵌合穴Ｂと金型開閉動作毎に嵌合するように
しても、前例の不具合が発生するので問題があった。ま
た、スプルーをなくして製品に対する材料費のコストダ
ウンを図るスプルーレスの成形装置が提案されている
（特開平５−２１２７５７号公報）が、成形後に成形品
とランナーが取り出されランナーは、廃棄されることに
よりコストアップの要因となるし、摩耗やカジリによっ
てギャップ発生を修正するための金型部品加工コストや
製作期間の面で不利となるばかりか、金型の維持コスト
も高くなるなどの欠点がある。本発明は、これら従来の
諸欠点を解決しようとするもので、中心軸穴などのある
成形品を成形する際に、ゲートを開閉する摺動ピンでス
プルー、並びにランナーを無くして成形品に対する成形
樹脂材料のコストダウンを図り、芯ずれもなく品質良好
な成形品を生産性よく製造でき、成形金型の摩耗やカジ
リ等の発生もなく金型維持コストも大巾に低減できる射
出成形装置を構成簡単で安価に提供することを目的とし
たものである。However, when several gates are provided while avoiding the opening such as the central shaft hole, the molded product is required to have a dimensional accuracy such as a roundness such as a gear or an optical disk. It cannot be used if the presence of a weld, which is the junction of the resin, is not allowed. For this reason, the disk gate, which is often used for molding the disk substrate, has higher dimensional accuracy than the several-point gate and does not cause welds, but has a drawback that the number of machining steps increases and the processing cost increases. Also, instead of the disk gate, a case of hot runner injecting resin from the opening such as the central axis hole,
For example, in the structure in which the slidable pin A for opening and closing the gate for the molded product C simultaneously forms the central axis as shown in FIG. 5, the pin A is inserted into the hole B on the movable side of the mold. It must be fitted each time the mold is opened and closed. On the other hand, the fixed side with the pin and the movable side with the fitting hole B are fixed to the fixed platen and the movable platen of the molding machine, respectively, and it is very difficult for the cores to accurately coincide when the mold is opened and closed. Is. Therefore, there is a problem that abrasion or galling of the pin A or the fitting hole B occurs, and the slidable pin A on the mold fixing side that opens and closes the gate for the molded product C as shown in FIG. Even if the fitting hole B on the movable side of the mold is fitted every time the mold is opened and closed, the problem of the previous example occurs, which is a problem. In addition, a sprueless molding apparatus has been proposed to eliminate the sprue and reduce the material cost for the product (Japanese Patent Laid-Open No. 5-212757). However, the molded product and the runner are taken out after the molding and the runner is discarded. This causes a cost increase, and not only is it disadvantageous in terms of mold part processing cost and manufacturing period to correct the gap occurrence due to wear and galling, but also the mold maintenance cost is high. is there. The present invention is intended to solve these conventional drawbacks, and when molding a molded product having a central shaft hole or the like, a sliding pin that opens and closes a gate eliminates a sprue and a runner to mold the molded product. An injection molding machine that can reduce the cost of resin materials, produce high-quality molded products without misalignment with good productivity, and significantly reduce the mold maintenance cost without causing wear or galling of the molding dies. It is intended to provide a simple structure and inexpensive.
【０００４】[0004]
【課題を解決するための手段】本発明は、固定側金型と
可動側金型との間に形成されるキャビティに連通するホ
ットランナー内に摺動自在に設けられたピンでゲートを
開閉する射出成形装置において、固定側金型と可動側金
型とにそれぞれ駆動部に連結された固定側ピンと可動側
ピンとを接離自在で摺動可能に対設し、該固定側ピンの
先端部に大径のフランジ部を備えてキャビティのゲート
を開閉するようにすると共に、両ピンの先端面を錐面或
いは球面の凹凸面で接離自在に嵌合当接配備したもので
ある。According to the present invention, a gate is opened and closed by a pin slidably provided in a hot runner communicating with a cavity formed between a fixed side mold and a movable side mold. In an injection molding apparatus, a fixed side mold and a movable side mold are provided with a fixed side pin and a movable side pin, which are respectively connected to a drive unit, slidably opposed to each other so that the fixed side pin and the movable side pin are slidable. A large-diameter flange portion is provided to open and close the gate of the cavity, and the tip surfaces of both pins are fitted and abutted so as to be separable by a conical surface or a spherical uneven surface.
【０００５】[0005]
【作用】光ディスク基板の成形の例で説明すると、溶融
樹脂材料が樹脂流路を経由してキャビティに対して注入
され、特に、金型の型締したのち、ノズルから溶融樹脂
を射出すると、射出された溶融樹脂は保温された金型内
に流過し、更に通電により加熱保温されたホットランナ
ーを通過してゲート開の時にキャビティの中心から半径
方向に広がるラジアルフローで均一に充填される。即
ち、ホットランナー内に摺動する固定側，可動側ピンに
よって、キャビティのゲートの開閉が行われるが、この
固定側，可動側ピンは、金型が閉じた状態では、各々の
先端で接しているか、或いは隙間がある状態で固定側，
可動側ピンの先端は接すると、テーパー等でお互いの芯
が合う構造となっていて、溶融樹脂の射出開始時に固定
側のピンが前進し、可動側のピンに接し、２本のピンの
芯が合った状態で固定側のピンが更に前進し、可動側の
ピンが後退する。前進した固定側のピンは後退した可動
側のピンの穴に嵌合される。同時に固定側のピンと金型
キャビティとの隙間で樹脂を注入するゲートが形成され
て、このゲートより溶融された樹脂が、金型キャビティ
に注入され、所定時間経過後、可動側のピンが前進し同
時に固定側のピンが後退し、固定側のピンによりゲート
を閉じる操作を繰り返し、スプルー並びにランナーをな
くした状態で品質良好な光ディスク基板の製品を低コス
トで生産することができる。In the example of molding the optical disk substrate, the molten resin material is injected into the cavity through the resin flow path, and in particular, when the molten resin is injected from the nozzle after the mold is clamped, the injection is performed. The molten resin thus made flows into the heat-insulating mold, and further passes through the hot runner heated and kept warm by energization to be uniformly filled with a radial flow that spreads radially from the center of the cavity when the gate is opened. That is, the gate of the cavity is opened and closed by the fixed side and movable side pins that slide in the hot runner. The fixed side and movable side pins contact each other at their tips when the mold is closed. Or the fixed side with a gap,
When the tips of the movable side pins come into contact with each other, they have a structure in which the cores of the two sides are matched by a taper, etc. When the injection of molten resin is started, the fixed side pins move forward and come into contact with the movable side pins, and the cores of the two pins The fixed side pins move further forward and the movable side pins move backward in the state where they match. The pin on the fixed side that has moved forward is fitted into the hole on the pin on the movable side that has retracted. At the same time, a gate for injecting resin is formed in the gap between the pin on the fixed side and the mold cavity, and the resin melted from this gate is injected into the mold cavity, and after a lapse of a predetermined time, the pin on the movable side advances. At the same time, the pin on the fixed side retracts, and the operation of closing the gate by the pin on the fixed side is repeated, so that a good quality optical disk substrate product can be produced at low cost without sprue and runners.
【０００６】[0006]
【実施例】本発明の実施例を、図１及び図２の例におけ
る光ディスク基板の成形金型で説明すると、固定側金型
１１と、これに対設される可動側金型１２とからなる成
形金型内に、光ディスク状キャビティ１０を形成し、こ
のキャビティ１０に連通する溶融樹脂注入用の中心軸穴
となるホットランナー１３を通電加熱手段、例えばヒー
ター１４を備えて設け、成形機ノズル１５により、ホッ
トランナー内の樹脂を加圧しつつ供給してキャビティ１
０に溶融樹脂を充填して、光ディスク基板を成形できる
ようにしてあって、前記ホットランナー１３内におい
て、固定側金型１１と可動側金型１２とにそれぞれ駆動
部３，４に連結された固定側ピン１と可動側ピン２とを
接離自在で摺動可能に対設し、該固定側ピン１の先端部
に大径のフランジ部７を備えてキャビティ１０のゲート
を開閉するようにすると共に、両ピン１，２の先端面を
錐面或いは球面の凹凸面５，６で接離自在に嵌合当接配
備して光ディスク基板用の射出成形装置としてある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to a molding die for an optical disk substrate in the examples shown in FIGS. 1 and 2, which is composed of a fixed-side die 11 and a movable-side die 12 provided opposite thereto. An optical disk-shaped cavity 10 is formed in a molding die, and a hot runner 13 serving as a central shaft hole for injecting a molten resin, which communicates with the cavity 10, is provided with an electric heating means, for example, a heater 14, and a molding machine nozzle 15 is provided. The resin in the hot runner is pressurized and supplied by the cavity 1
0 is filled with a molten resin so that an optical disk substrate can be molded. In the hot runner 13, the fixed side mold 11 and the movable side mold 12 are connected to the driving units 3 and 4, respectively. The fixed-side pin 1 and the movable-side pin 2 are slidably opposed to each other so that the fixed-side pin 1 and the movable-side pin 2 are provided slidably, and a large-diameter flange portion 7 is provided at the tip of the fixed-side pin 1 to open and close the gate of the cavity 10. At the same time, the tip surfaces of both pins 1 and 2 are fitted and abutted so as to be freely contactable and separable with conical or spherical concavo-convex surfaces 5 and 6 to provide an injection molding device for an optical disk substrate.
【０００７】前記固定側ピン１としては、溶融樹脂を注
入する前記ホットランナー１３の中心軸穴に同心に貫通
された中心軸であって、後端に駆動シリンダの駆動部３
を備え、キャビティ１０のゲートを開閉動作するもの
で、その先端に前記キャビティのゲートを開閉しうる大
径のフランジ部７を備え、該フランジ部７と等径の可動
側ピン２とに接離自在に当接してある。The fixed pin 1 is a central shaft that is concentrically penetrated through the central shaft hole of the hot runner 13 for injecting the molten resin, and the rear end of the driving portion 3 of the driving cylinder.
Is provided for opening and closing the gate of the cavity 10, and has a large-diameter flange portion 7 capable of opening and closing the gate of the cavity at its tip, and is brought into contact with and separated from the flange portion 7 and the movable-side pin 2 having the same diameter. Abut freely.
【０００８】この固定側および，可動側のピン１，２
は、金型が閉じた状態では、各々の先端で接している
か、或いは隙間がある状態で、固定側，可動側ピン１，
２の先端は接すると、テーパー等でお互いの芯が合う凹
凸面５，６の嵌合構造をとなっていて、溶融樹脂の射出
開始時に固定側ピン１が前進し、可動側ピン２に接し、
２本のピン１，２の芯が合った状態で固定側ピン１が更
に前進し、可動側ピン２が後退する。前進した固定側ピ
ン１は後退した可動側ピン２の穴に嵌合されて、同時に
固定側ピン１とキャビティ１０との隙間で樹脂を注入す
るゲートが形成されて、このゲートより溶融された樹脂
が、キャビティ１０に注入され、所定時間経過後、可動
側ピン２が前進し同時に固定側ピン１が後退し、固定側
ピン１によりゲートを閉じる操作を繰り返し、スプルー
並びにランナーをなくした状態で品質良好な光ディスク
基板を生産することができる。The fixed side and movable side pins 1 and 2
Are fixed side and movable side pins 1, when the molds are closed and the tips are in contact with each other or there is a gap.
When the tip of 2 is in contact, it has a fitting structure of concave and convex surfaces 5 and 6 in which the cores of the two come into contact with each other by a taper or the like. At the start of injection of the molten resin, the fixed side pin 1 advances and contacts the movable side pin 2. ,
With the cores of the two pins 1 and 2 aligned, the fixed-side pin 1 further advances and the movable-side pin 2 retracts. The fixed side pin 1 that has moved forward is fitted into the hole of the movable side pin 2 that has moved backward, and at the same time, a gate for injecting resin is formed in the gap between the fixed side pin 1 and the cavity 10, and the resin melted from this gate is formed. However, after a certain time has been injected into the cavity 10, the movable side pin 2 moves forward and the fixed side pin 1 retracts at the same time, and the fixed side pin 1 closes the gate repeatedly to eliminate sprue and runner quality. A good optical disk substrate can be produced.
【０００９】なお、前記ホットランナー１３が、マニホ
ールドに形成された溶融樹脂流路９に連通され、ヒータ
ー１４などの加熱手段により加熱される中心軸穴を有し
て固定側金型１１に備えられるものであって、可動側金
型１２に備えられる可動側ピン２の中心軸穴に対設され
ていて、この可動側ピン２は、前記固定側ピン１の移動
に追随して移動しキャビティ１０のゲートを閉じるもの
であって、型開き時点まで固定側ピン１と当接状態に配
備されている。The hot runner 13 is connected to the molten resin flow path 9 formed in the manifold and has a central shaft hole which is heated by a heating means such as a heater 14 and is provided in the stationary mold 11. The movable side pin 2 is provided in opposition to the central shaft hole of the movable side pin 2 provided in the movable side mold 12, and the movable side pin 2 moves following the movement of the fixed side pin 1 to move to the cavity 10. The gate is closed, and it is placed in contact with the fixed pin 1 until the mold is opened.
【００１０】図３及び図４の例では、前記ホットランナ
ー１３の先端部に大径穴１６を形成して、該大径穴１６
に固定側ピン１の先端のフランジ部７が装入されて移動
できるようにしたもので、可動側ピン２の当接時に、溶
融樹脂の戻りが容易で、固定側ピン１と可動側ピン２と
の当接面間に樹脂残りがないようにする好適例である。In the example of FIGS. 3 and 4, a large diameter hole 16 is formed at the tip of the hot runner 13, and the large diameter hole 16 is formed.
A flange portion 7 at the tip of the fixed side pin 1 is inserted into the movable side pin 2 so that the fixed side pin 1 and the movable side pin 2 can move easily when the movable side pin 2 comes into contact with the fixed side pin 1. This is a preferred example in which there is no resin residue between the contact surfaces with and.
【００１１】この場合、射出時に固定側ピン１のみが後
退し、射出後ゲートを閉じる時点で可動側ピン２が前進
しゲートを閉じ、同時に先端で芯を合わせ、金型が開く
時点までに固定側ピン１と可動側ピン２が同時に移動
し、射出前の状態にもどるようにしてスプルー並びにラ
ンナーをなくした状態で光ディスク基板を量産できる。In this case, only the fixed side pin 1 retreats during injection, the movable side pin 2 advances and closes the gate at the time of closing the gate after injection, and at the same time aligns the cores at the tips and fixes by the time the mold opens. The side pin 1 and the movable side pin 2 move at the same time to return to the state before the injection, so that optical disc substrates can be mass-produced in a state where sprue and runner are eliminated.
【発明の効果】本発明は、固定側金型と可動側金型との
間に形成されるキャビティに連通するホットランナー内
に摺動自在に設けられたピンでゲートを開閉する射出成
形装置において、固定側金型と可動側金型とにそれぞれ
駆動部に連結された固定側ピンと可動側ピンとを接離自
在で摺動可能に対設し、該固定側ピンの先端部に大径の
フランジ部を備えてキャビティのゲートを開閉するよう
にすると共に、両ピンの先端面を錐面或いは球面の凹凸
面で接離自在に嵌合当接配備したことにより、金型が閉
じた状態では固定側或いは可動側のピン共に嵌合穴に嵌
合されることはなく、摩耗，カジリ等の不具合は発生し
ないし、また射出時、ゲートを閉じる時の固定側，可動
側のピンの嵌合穴への移動は、お互いのピンの先端で芯
が合っているため、摩耗，カジリは発生しないので、金
型維持コストが大巾に低減でき、成形作業も安全、円滑
で生産性を高められ、しかもスプルーやランナーが発生
しないために、成形品に対する材料節減が容易で、加工
後の作業もなく、コスト面より有利であり、構成も簡単
で製作容易であるなどの効果がある。INDUSTRIAL APPLICABILITY The present invention relates to an injection molding apparatus for opening and closing a gate with a pin slidably provided in a hot runner communicating with a cavity formed between a fixed mold and a movable mold. , A fixed-side mold and a movable-side mold are provided with a fixed-side pin and a movable-side pin, which are respectively connected to the drive unit, slidably in contact with and separated from each other, and a large-diameter flange is provided at the tip of the fixed-side pin. It is equipped with a part to open and close the gate of the cavity, and the tip surfaces of both pins are fitted and abutted so that they can be separated and come into contact with the conical surface of the conical surface or spherical surface, so that the mold is fixed when it is closed. Side or movable side pins are not fitted in the fitting holes, and problems such as wear and galling do not occur, and fixed side and movable side pin fitting holes when injecting or closing the gate. To move to because the cores of both pins are aligned. Since there is no wear or galling, mold maintenance cost can be greatly reduced, molding work is safe, smooth and productivity is improved, and sprues and runners do not occur, so it is easy to save material for molded products. In addition, there is no post-processing work, which is advantageous in terms of cost, has a simple configuration, and is easy to manufacture.
【図１】本発明の実施例を示す縦断面図である。FIG. 1 is a vertical sectional view showing an embodiment of the present invention.
【図２】図１の例の作動状態を示す一部の縦断面図で、
（ａ）は型閉工程、（ｂ）は樹脂射出工程（ゲート
開）、（ｃ）は冷却工程（ゲートカット・ゲート閉）を
示す。FIG. 2 is a partial vertical cross-sectional view showing an operating state of the example of FIG.
(A) shows a mold closing process, (b) shows a resin injection process (gate opening), and (c) shows a cooling process (gate cutting / gate closing).
【図３】本発明の他の実施例を示す縦断面図である。FIG. 3 is a vertical sectional view showing another embodiment of the present invention.
【図４】図３の例の作動状態を示す一部の縦断面図で、
（ａ）は型閉工程、（ｂ）は射出工程（ゲート開）、
（ｃ）は冷却工程（ゲート閉）、（ｄ）は冷却工程（ゲ
ートカット）を示す。FIG. 4 is a partial vertical cross-sectional view showing an operating state of the example of FIG.
(A) is a mold closing process, (b) is an injection process (gate opening),
(C) shows a cooling step (gate closed), and (d) shows a cooling step (gate cut).
【図５】従来例の一部の拡大縦断面図である。FIG. 5 is an enlarged vertical sectional view of a part of a conventional example.
【図６】従来例の他例の一部の拡大縦断面図である。FIG. 6 is a partially enlarged vertical sectional view of another example of the conventional example.
【符号の説明】 １ 固定側ピン ２ 可動側ピン ３，４ 駆動部 ５，６ 凹凸面 ７ フランジ部 ８ マニホールド ９ 溶融樹脂流路 １０ キャビティ １１ 固定側金型 １２ 可動側金型 １３ ホットランナー １４ ヒーター １５ 成形機ノズル[Explanation of symbols] 1 fixed side pin 2 movable side pin 3,4 drive part 5,6 uneven surface 7 flange part 8 manifold 9 molten resin flow path 10 cavity 11 fixed side mold 12 movable side mold 13 hot runner 14 heater 15 Molding machine nozzle
Claims (2)
れるキャビティに連通するホットランナー内に摺動自在
に設けられたピンでゲートを開閉する射出成形装置にお
いて、固定側金型と可動側金型とにそれぞれ駆動部に連
結された固定側ピンと可動側ピンとを接離自在で摺動可
能に対設し、該固定側ピンの先端部に大径のフランジ部
を備えてキャビティのゲートを開閉するようにすると共
に、両ピンの先端面を錐面或いは球面の凹凸面で接離自
在に嵌合当接配備したことを特徴とする射出成形装置。1. An injection molding apparatus for opening and closing a gate with a pin slidably provided in a hot runner communicating with a cavity formed between a fixed side mold and a movable side mold. A fixed side pin and a movable side pin, which are respectively connected to the driving unit, are slidably installed in the mold and the movable side mold so that they can be contacted and separated from each other, and a large-diameter flange portion is provided at the tip of the fixed side pin. An injection molding apparatus, characterized in that a gate of a cavity is opened and closed, and tip ends of both pins are fitted and abutted so as to freely come into contact with and separate from each other by a conical surface or an uneven surface of a spherical surface.
動に追随して移動するものであって、型開き時点まで固
定側ピンと当接状態に配備された請求項１記載の射出成
形装置。2. The injection molding apparatus according to claim 1, wherein the movable-side pin moves following the movement of the fixed-side pin, and is arranged in contact with the fixed-side pin until a mold opening time. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9545394A JPH07276437A (en) | 1994-04-11 | 1994-04-11 | Injection molding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9545394A JPH07276437A (en) | 1994-04-11 | 1994-04-11 | Injection molding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07276437A true JPH07276437A (en) | 1995-10-24 |
Family
ID=14138117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9545394A Withdrawn JPH07276437A (en) | 1994-04-11 | 1994-04-11 | Injection molding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07276437A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0896871A2 (en) * | 1997-08-14 | 1999-02-17 | Husky Injection Molding Systems Ltd. | Valve gate assembly and moulding process |
| US7147814B1 (en) | 1998-02-25 | 2006-12-12 | Fuji Photo Film Co., Ltd. | Injection molding method and injection mold |
| US7198740B2 (en) | 2002-12-20 | 2007-04-03 | Mold-Masters Limited | Lateral gating injection molding apparatus |
-
1994
- 1994-04-11 JP JP9545394A patent/JPH07276437A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0896871A2 (en) * | 1997-08-14 | 1999-02-17 | Husky Injection Molding Systems Ltd. | Valve gate assembly and moulding process |
| US7147814B1 (en) | 1998-02-25 | 2006-12-12 | Fuji Photo Film Co., Ltd. | Injection molding method and injection mold |
| US7198740B2 (en) | 2002-12-20 | 2007-04-03 | Mold-Masters Limited | Lateral gating injection molding apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010703 |