JP3354986B2 - Injection method and injection device for injection molding machine - Google Patents
Injection method and injection device for injection molding machineInfo
- Publication number
- JP3354986B2 JP3354986B2 JP09186293A JP9186293A JP3354986B2 JP 3354986 B2 JP3354986 B2 JP 3354986B2 JP 09186293 A JP09186293 A JP 09186293A JP 9186293 A JP9186293 A JP 9186293A JP 3354986 B2 JP3354986 B2 JP 3354986B2
- Authority
- JP
- Japan
- Prior art keywords
- screw
- piston
- injection
- molten material
- front chamber
- 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.)
- Expired - Fee Related
Links
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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
-
- 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
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C2045/5004—Axially movable screw the forward screw end provided with an injection ram
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、スクリュによる計量機
能とピストンをスクリュと一体に前進させる射出機構と
を持つプリプラ方式の射出成形機の射出方法及び射出装
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 method and an injection apparatus for a pre-plastic injection molding machine having a screw metering function and an injection mechanism for advancing a piston integrally with the screw.
【０００２】[0002]
【従来の技術及びその課題】従来のプリプラ方式の射出
成形機は、スクリュ（又はプランジャ，トーピード）に
よつて成形材料の溶融混練及び押し出しを行い、溶融材
料を、計量機能を有するピストンの前部に所定量貯蔵
し、スクリュ（又はプランジャ）とは独立してピストン
を有する射出機構によつて射出成形を行うものであり、
スクリュの後部に射出機構を備えていない。このため、
粘度の低い成形材料であつてもピストンによつて良好に
射出することができるが、反面、（１）加熱筒が２個必
要になる、（２）加熱筒間の溶融材料の移送機構が複雑
である、（３）溶融混練装置と射出装置とが別個の構造
になるので、射出成形機が大きくなり、高価であるとい
う技術的課題がある。2. Description of the Related Art In a conventional injection molding machine of a pre-plastic system, a molding material is melt-kneaded and extruded by a screw (or plunger, torpedo), and the molten material is supplied to a front portion of a piston having a measuring function. The injection molding is performed by an injection mechanism having a piston independently of the screw (or plunger).
There is no injection mechanism at the rear of the screw. For this reason,
Even a molding material having a low viscosity can be satisfactorily injected by the piston, but on the other hand, (1) two heating cylinders are required, and (2) a mechanism for transferring the molten material between the heating cylinders is complicated. (3) Since the melt-kneading device and the injection device have separate structures, there is a technical problem that the injection molding machine becomes large and expensive.
【０００３】[0003]
【課題を解決するための手段】本発明は、このような従
来の技術的課題に鑑みてなされたものであり、請求項１
の発明の構成は、加熱筒１に内挿され、回転機構２２に
よつて回転されて成形材料の溶融混練を行うと共に射出
機構２３によつて進退駆動され、加熱筒１に摺動自在に
嵌合するシール機構９を前端部に有するスクリュ２の前
側に、加熱筒１内に摺動自在に嵌合するピストン５を設
け、ピストン５の前側にノズル６に接続する前室４を区
画すると共に、スクリュ２の回転によつて押し出される
溶融材料を、ピストン５及びシール機構９を迂回する流
路７を通して前室４に貯蔵した後、スクリュ２によつて
ピストン５を前進させ、前室４内の溶融材料をノズル６
から金型２０に射出することを特徴とする射出成形機の
射出方法である。そして、スクリュ２の回転によつて押
し出される溶融材料を流路７を通して前室４に貯蔵する
際、前室４への流入量に合わせて、ピストン５及びスク
リュ２を一体に後退させることができ、また、スクリュ
２の回転によつて押し出される溶融材料を流路７を通し
て前室４に貯蔵する際、溶融材料の所定量が前室４に貯
蔵されるように、予め、ピストン５と別個にスクリュ２
のみを後退させることができる。請求項４の発明の構成
は、加熱筒１に内挿され、回転機構２２によつて回転さ
れて成形材料の溶融混練を行うと共に射出機構２３によ
つて進退駆動されるスクリュ２の前側に、加熱筒１内に
摺動自在に嵌合するピストン５を一体に設け、ピストン
５の前側にノズル６に接続する前室４を区画すると共
に、スクリュ（２）の回転によつて押し出される溶融材
料を、ピストン（５）を迂回して設けられ、かつ、前室
（４）からスクリュ（２）に向かう溶融材料の流れを阻
止する逆流防止弁（８）を有する流路（７）を通して前
室（４）に貯蔵した後、逆流防止弁（８）によつて溶融
材料の流れを阻止した状態で、スクリュ（２）によつて
ピストン（５）を前進させ、前室（４）内の溶融材料を
ノズル（６）から金型（２０）に射出することを特徴と
する射出成形機の射出方法である。また、請求項５の発
明の構成は、加熱筒１に内挿され、回転機構２２によつ
て回転されて成形材料の溶融混練を行うと共に射出機構
２３によつて進退駆動され、加熱筒１に摺動自在に嵌合
するシール機構９を前端部に有するスクリュ２の前側
に、加熱筒１内に摺動自在に嵌合するピストン５を設
け、ピストン５の前側にノズル６に接続する前室４を区
画すると共に、スクリュ２の周囲側と前室４とを接続す
る流路７を、ピストン５及びシール機構９を迂回させて
設けることを特徴とする射出成形機の射出装置である。
そして、ピストン５を、スクリュ２の前端面に当接可能
に設けることができる。また、ピストン５を支持ロッド
５ａを介してスクリュ２の前端面に当接可能に設けると
共に、支持ロッド５ａと対応する箇所の加熱筒１に通気
孔２ｃを形成することができる。請求項８の発明の構成
は、加熱筒１に内挿され、回転機構２２によつて回転さ
れて成形材料の溶融混練を行うと共に射出機構２３によ
つて進退駆動されるスクリュ２の前側に、加熱筒１内に
摺動自在に嵌合するピストン５を一体に設け、ピストン
５の前側にノズル６に接続する前室４を区画すると共
に、スクリュ２の周囲側と前室４とを接続する流路７
が、ピストン５を迂回させて形成され、かつ、前室４か
らスクリュ２に向かう溶融材料の流れを阻止する逆流防
止弁８を流路（７）に備えることを特徴とする射出成形
機の射出装置である。 SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional technical problem.
According to the structure of the invention, the heating cylinder 1 is inserted and rotated by a rotation mechanism 22 to melt and knead the molding material, and is driven forward and backward by an injection mechanism 23 to be slidable on the heating cylinder 1.
In front of the screw 2 that have a seal mechanism 9 to be fitted to the front end, a piston 5 slidably fitted into the heating cylinder 1 is provided, the front chamber 4 connected to the nozzle 6 on the front side of the piston 5 The molten material extruded by the rotation of the screw 2 while being partitioned is stored in the front chamber 4 through the flow path 7 bypassing the piston 5 and the sealing mechanism 9, and then the piston 5 is advanced by the screw 2, The molten material in the chamber 4
Injection method for an injection molding machine, characterized in that the injection is performed from a mold to a mold 20. When the molten material extruded by the rotation of the screw 2 is stored in the front chamber 4 through the flow path 7, the piston 5 and the screw 2 can be retracted integrally in accordance with the amount of flow into the front chamber 4. Further, when the molten material extruded by the rotation of the screw 2 is stored in the front chamber 4 through the flow path 7, the molten material is stored separately from the piston 5 in advance so that a predetermined amount of the molten material is stored in the front chamber 4. Screw 2
Only can be retracted. Structure of the invention of claim 4
Is inserted into the heating cylinder 1 and rotated by the rotation mechanism 22.
To melt and knead the molding material,
In front of the screw 2 driven forward and backward,
The piston 5 which is slidably fitted is provided integrally,
5 and a front chamber 4 connected to the nozzle 6
The molten material extruded by the rotation of the screw (2)
Material is provided around the piston (5), and
Block the flow of molten material from (4) to screw (2)
Through the flow path (7) with the check valve (8) to stop
After being stored in the chamber (4), it is melted by the check valve (8).
In a state where the flow of material is stopped, the screw (2)
Advance the piston (5) to remove the molten material in the front chamber (4).
Injection from the nozzle (6) to the mold (20)
This is an injection method of an injection molding machine. According to a fifth aspect of the present invention, the heating cylinder 1 is inserted into the heating cylinder 1, rotated by a rotation mechanism 22 to melt and knead the molding material, and driven forward and backward by an injection mechanism 23 to be moved to the heating cylinder 1. Sliding fit
The sealing mechanism 9 on the front side of the screw 2 that Yusuke to the front end of the piston 5 slidably fitted into the heating cylinder 1 is provided, defining a front chamber 4 connected to the nozzle 6 on the front side of the piston 5 At the same time, the flow path 7 connecting the peripheral side of the screw 2 and the front chamber 4 is bypassed by the piston 5 and the seal mechanism 9.
An injection device for an injection molding machine, characterized in Rukoto provided.
Then, the piston 5 can be provided so as to be in contact with the front end face of the screw 2. In addition, the piston 5 can be provided so as to be in contact with the front end face of the screw 2 via the support rod 5a, and the ventilation hole 2c can be formed in the heating cylinder 1 at a position corresponding to the support rod 5a. Structure of the invention of claim 8
Is inserted into the heating cylinder 1 and rotated by the rotation mechanism 22.
To melt and knead the molding material,
In front of the screw 2 driven forward and backward,
The piston 5 which is slidably fitted is provided integrally,
5 and a front chamber 4 connected to the nozzle 6
And a flow path 7 connecting the peripheral side of the screw 2 and the front chamber 4.
Are formed around the piston 5 and the front chamber 4
Backflow prevention to prevent the flow of molten material from screw to screw 2
Injection molding characterized in that a stop valve 8 is provided in a flow path (7).
Machine injection equipment.
【０００４】[0004]
【作用】請求項１の発明によれば、回転機構２２によつ
てスクリュ２を回転駆動すれば、成形材料が溶融混練さ
れて溶融材料となり流路７から押し出される。押し出さ
れた溶融材料は、流路７を通つて前室４に貯蔵される。
溶融材料の所定量が前室４に貯蔵されたなら、射出機構
２３によつてスクリュ２に前進移動を与え、前室４内の
溶融材料をピストン５によつて押圧してノズル６から金
型２０に射出させる。According to the first aspect of the present invention, when the screw 2 is driven to rotate by the rotation mechanism 22, the molding material is melted and kneaded to become a molten material and is extruded from the flow path 7. The extruded molten material is stored in the front chamber 4 through the flow path 7.
When a predetermined amount of the molten material has been stored in the front chamber 4, the screw 2 is moved forward by the injection mechanism 23, and the molten material in the front chamber 4 is pressed by the piston 5 to form a mold through the nozzle 6. Inject to 20.
【０００５】このような射出成形機の射出方法におい
て、スクリュ２の回転によつて押し出される溶融材料を
流路７を通して前室４に貯蔵する際、前室４への流入量
に合わせて、ピストン５及びスクリュ２を一体に後退さ
せれば、溶融材料がスクリュ２の後退量によつて計量さ
れて前室４に貯蔵される。[0005] In the injection method of such an injection molding machine, when the molten material extruded by the rotation of the screw 2 is stored in the front chamber 4 through the flow path 7, the piston is adjusted in accordance with the inflow into the front chamber 4. When the screw 5 and the screw 2 are retracted integrally, the molten material is measured by the amount of screw 2 retracted and stored in the front chamber 4.
【０００６】また、スクリュ２の回転によつて押し出さ
れる溶融材料を流路７を通して前室４に貯蔵する際、溶
融材料の所定量が前室４に貯蔵されるように、予め、ピ
ストン５と別個にスクリュ２のみを後退させれば、溶融
材料の前室４への貯蔵に伴つてピストン５が後退し、ピ
ストン５がスクリュ２の前端面に当接したことにより、
計量が完了する。請求項５の発明によれば、請求項１の
発明と同様に、回転機構２２によつてスクリュ２を回転
駆動すれば、成形材料が溶融混練されて溶融材料となり
流路７から押し出される。押し出された溶融材料は、流
路７を通つて前室４に貯蔵される。溶融材料の所定量が
前室４に貯蔵されたなら、射出機構２３によつてスクリ
ュ２に前進移動を与え、前室４内の溶融材料をピストン
５によつて押圧してノズル６から金型２０に射出させ
る。Further, when the molten material extruded by the rotation of the screw 2 is stored in the front chamber 4 through the flow path 7, the piston 5 and the piston 5 are previously stored so that a predetermined amount of the molten material is stored in the front chamber 4. If only the screw 2 is retracted separately, the piston 5 retracts with the storage of the molten material in the front chamber 4, and the piston 5 comes into contact with the front end face of the screw 2.
The weighing is completed. According to the fifth aspect of the present invention, similarly to the first aspect of the present invention, when the screw 2 is driven to rotate by the rotating mechanism 22, the molding material is melted and kneaded to become a molten material and is extruded from the flow path. The extruded molten material is stored in the front chamber 4 through the flow path 7. When a predetermined amount of the molten material has been stored in the front chamber 4, the screw 2 is moved forward by the injection mechanism 23, and the molten material in the front chamber 4 is pressed by the piston 5 to form a mold through the nozzle 6. Inject to 20.
【０００７】ピストン５は、スクリュ２に固着し又は請
求項６に記載したようにスクリュ２の先端面に当接可能
に設けることができる。スクリュ２の先端面に当接可能
に設けたピストン５は、前室４に流入して貯蔵される溶
融材料の反力が作用するので、次第に後退する。The piston 5 can be fixed to the screw 2 or provided so as to be in contact with the tip end surface of the screw 2 as described in claim 6 . The piston 5 provided so as to be in contact with the distal end surface of the screw 2 gradually retreats due to the reaction force of the molten material flowing into and stored in the front chamber 4.
【０００８】請求項７に記載したように、ピストン５を
支持ロッド５ａを介してスクリュ２の前端面に当接可能
に設けると共に、支持ロッド５ａと対応する箇所の加熱
筒１に通気孔２ｃを形成すれば、請求項３の発明を具体
的に実施することができる。すなわち、スクリュ２の回
転によつて押し出される溶融材料を流路７を通して前室
４に貯蔵する際、溶融材料の所定量が前室４に貯蔵され
るように、予め、ピストン５と別個にスクリュ２のみを
後退させる。次に、溶融材料の前室４への貯蔵に伴つて
前室４に流入して貯蔵される溶融材料の反力によつてピ
ストン５が後退する。スクリュ２の後退に伴つて、通気
孔２ｃから空気が流入し、ピストン５の後退に伴つて、
通気孔２ｃから空気が流出する。ピストン５が、支持ロ
ッド５ａを介してスクリュ２の前端面に当接したことに
より、計量が完了する。As described in claim 7 , the piston 5 is provided so as to be able to abut on the front end face of the screw 2 via the support rod 5a, and the ventilation hole 2c is formed in the heating cylinder 1 at a location corresponding to the support rod 5a. If formed, the invention of claim 3 can be specifically implemented. That is, when the molten material extruded by the rotation of the screw 2 is stored in the front chamber 4 through the flow path 7, the screw is previously separated from the piston 5 so that a predetermined amount of the molten material is stored in the front chamber 4. Retract only 2 Next, as the molten material is stored in the front chamber 4, the piston 5 retreats due to the reaction force of the molten material flowing into and stored in the front chamber 4. Accompanied the retraction of the screw 2 connexion, to inflows of air from the vents 2c, accompanied connexion to retraction of the piston 5,
Air out flow from the ventilation hole 2c. The metering is completed when the piston 5 comes into contact with the front end face of the screw 2 via the support rod 5a.
【０００９】なお、請求項１，５によれば、スクリュ２
の前端部に、加熱筒１に摺動自在に嵌合するシール機構
９を設置したので、シール機構９により、溶融材料の漏
洩が防止される。 According to the first and fifth aspects , the screw 2
Since the seal mechanism 9 slidably fitted to the heating cylinder 1 is installed at the front end of the heater, the seal mechanism 9 prevents leakage of the molten material.
【００１０】また、請求項４，８のように、流路７がピ
ストン５を迂回させて形成され、かつ、流路７に、前室
４からスクリュ２に向かう溶融材料の流れを阻止する逆
流防止弁８を設けた場合には、計量時に逆流防止弁８を
開放し、また、金型２０に射出させる際、逆流防止弁８
を閉じて流路７からの逆流を防止する。なお、溶融材料
の粘度が比較的高い場合には、スクリュ２と加熱筒１と
の間の流動抵抗が溶融材料の逆流を防止するので、この
種の溶融材料のみを扱う場合には、逆流防止弁８を省略
することができる。他方、溶融材料の粘度が比較的低い
場合には、溶融材料が流路７を通つて前室４に押し出さ
れる際、ノズル６から少量流出し、いわゆるはなだれ現
象を生ずる。これの防止のために、ノズル６に逆流防止
弁を必要に応じて付属させることができる。[0010] In addition, the channel 7 is provided with a pipe.
When the check valve 8 is formed so as to bypass the ston 5 and is provided in the flow path 7 to prevent the flow of the molten material from the front chamber 4 toward the screw 2, the check valve 8 is opened at the time of measurement. When the mold 20 is injected, the check valve 8
Is closed to prevent backflow from the flow path 7. When the viscosity of the molten material is relatively high, the flow resistance between the screw 2 and the heating cylinder 1 prevents the backflow of the molten material. The valve 8 can be omitted. On the other hand, when the viscosity of the molten material is relatively low, when the molten material is extruded into the front chamber 4 through the flow path 7, a small amount of the molten material flows out of the nozzle 6, and a so-called avalanche phenomenon occurs. To prevent this, a check valve can be attached to the nozzle 6 if necessary.
【００１１】このような射出成形機の射出装置によれ
ば、溶融材料は、スクリュ２の回転によつて流路７から
前室４に押し出され、その後、スクリュ２の前進によつ
て前室４からノズル６を通つて金型２０に射出されるの
で、溶融材料の移送機構が簡素となる。According to the injection device of such an injection molding machine, the molten material is pushed out of the flow passage 7 into the front chamber 4 by the rotation of the screw 2, and thereafter, by the advance of the screw 2, the front chamber 4 is moved. From the nozzle 6 to the mold 20, the mechanism for transferring the molten material is simplified.
【００１２】[0012]
【実施例】以下、本発明の実施例について図面を参照し
て説明する。図１〜図４は、本発明に係る射出成形機の
射出方法に使用する射出装置の１実施例を示す。先ず、
図２を参照して射出成形機の概要について説明する。図
２中において符号１は加熱筒を示し、加熱筒１の後方に
は射出シリンダ１５が接続され、射出シリンダ１５の内
部には、射出ピストン１６が摺動自在に嵌合している。
この射出シリンダ１５及び射出ピストン１６により、後
圧力室２１ａと前圧力室２１ｂとを区画し、スクリュ２
に進退駆動を与える射出機構２３を構成している。ま
た、射出ピストン１６の内部には、ラジアル軸受１８ａ
及びスラスト軸受１８ｂを介在させて、射出ピストン１
６を貫通状態として回転自在かつ中心軸線方向の相対移
動不可能に出力軸１７が支持され、この出力軸１７の前
端部が加熱筒１に内挿したスクリュ２に接続され、出力
軸１７の後端部が油圧モータからなる回転機構２２に接
続されている。なお、出力軸１７はスプラインによつて
回転機構２２に対して伸縮自在である。Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of an injection apparatus used for an injection method of an injection molding machine according to the present invention. First,
The outline of the injection molding machine will be described with reference to FIG. In FIG. 2, reference numeral 1 denotes a heating cylinder. An injection cylinder 15 is connected to the rear of the heating cylinder 1, and an injection piston 16 is slidably fitted inside the injection cylinder 15.
The injection cylinder 15 and the injection piston 16 partition the rear pressure chamber 21a and the front pressure chamber 21b, and
An injection mechanism 23 for giving forward and backward drive to the motor is constituted. A radial bearing 18a is provided inside the injection piston 16.
And the injection piston 1 through the thrust bearing 18b.
6, the output shaft 17 is supported so as to be rotatable and unable to move relative to the center axis direction. The front end of the output shaft 17 is connected to the screw 2 inserted into the heating cylinder 1, and the output shaft 17 The end is connected to a rotation mechanism 22 composed of a hydraulic motor. The output shaft 17 is extendable and retractable with respect to the rotation mechanism 22 by splines.
【００１３】しかして、回転機構２２によつて出力軸１
７を介してスクリュ２が回転駆動されて、ホッパ１９か
ら供給される成形材料が、加熱筒１に付属するヒータ１
４によつて加熱されつつスクリュ２によつて溶融混練が
行われる。次いで、後圧力室２１ａに図外の圧力流体供
給源からの圧力流体を供給することにより、射出ピスト
ン１６、出力軸１７及びスクリュ２を一体として前進さ
せ、溶融材料をスクリュ２によつて金型２０に射出する
ことができ、また、前圧力室２１ｂに圧力流体供給源か
らの圧力流体を供給することにより、射出ピストン１
６、出力軸１７及びスクリュ２を一体として後退させる
ことができる。このようなスクリュ２の回転機構２２及
び射出機構２３は、従来のインラインスクリュ式の射出
成形機と実質的に異ならない。Thus, the output shaft 1 is rotated by the rotation mechanism 22.
The screw 2 is driven to rotate through the hopper 7, and the molding material supplied from the hopper 19 is supplied to the heater 1 attached to the heating cylinder 1.
The melt kneading is performed by the screw 2 while being heated by the screw 4. Next, by supplying a pressure fluid from a pressure fluid supply source (not shown) to the rear pressure chamber 21a, the injection piston 16, the output shaft 17, and the screw 2 are integrally advanced, and the molten material is molded by the screw 2 into a mold. 20 by supplying pressure fluid from a pressure fluid supply source to the front pressure chamber 21b.
6. The output shaft 17 and the screw 2 can be retracted integrally. The rotation mechanism 22 and the injection mechanism 23 of such a screw 2 are not substantially different from the conventional in-line screw type injection molding machine.
【００１４】このような加熱筒１は、図１に示すように
小内径部１ｂを有する加熱筒本体１ａと、加熱筒本体１
ａの先端部に接続するシリンダヘッド３とからなり、こ
の加熱筒本体１ａとシリンダヘッド３とシリンダヘッド
３の先端部に接続するノズル６とには、加熱用のヒータ
１４が付属されている。シリンダヘッド３は、基端側に
位置し、加熱筒本体１ａの内面に接続する小内径部３ａ
と、先端側に位置し、ノズル６に接続する大内径部３ｂ
とを備えると共に、スクリュ２の後記する補助スクリュ
２ｂの周囲と後記する前室４とを接続する流路７が形成
されている。加熱筒１に内挿されるスクリュ２は、スク
リュ本体２ａに補助スクリュ２ｂを接続して構成され、
補助スクリュ２ｂの前端部には、シリンダヘッド３の小
内径部３ａに摺動自在に嵌合する複数個のシールリング
からなるシール機構９を設置する。As shown in FIG. 1, the heating cylinder 1 includes a heating cylinder main body 1a having a small inner diameter portion 1b, and a heating cylinder main body 1a.
A heating head 14 is attached to the heating cylinder main body 1a, the cylinder head 3 and the nozzle 6 connected to the front end of the cylinder head 3. The cylinder head 3 is located on the base end side and has a small inner diameter portion 3a connected to the inner surface of the heating cylinder main body 1a.
And a large inner diameter portion 3b located on the distal end side and connected to the nozzle 6
And a flow path 7 for connecting the periphery of an auxiliary screw 2b described later with the front chamber 4 described later. The screw 2 inserted into the heating cylinder 1 is configured by connecting an auxiliary screw 2b to a screw main body 2a,
At the front end of the auxiliary screw 2b, a seal mechanism 9 including a plurality of seal rings slidably fitted to the small inner diameter portion 3a of the cylinder head 3 is installed.
【００１５】そして、補助スクリュ２ｂの前側に、シリ
ンダヘッド３の大内径部３ｂに摺動自在に嵌合するピス
トン５を設け、ピストン５の前側に、シリンダヘッド３
の大内径部３ｂとノズル６とで区画される前室４を形成
する。ピストン５は、前端部をピストン５に固着した支
持ロッド５ａを介して、補助スクリュ２ｂの前端面に当
接するようになつている。また、ピストン５には、シリ
ンダヘッド３の大内径部３ｂに摺接するシール機構５ｂ
を付属させてあり、両シール機構５ｂ，９の間、つまり
支持ロッド５ａに対応する箇所のシリンダヘッド３に
は、容積変動を吸収するための通気孔２ｃを大内径部３
ｂの後端に位置させて穿設してある。しかして、補助ス
クリュ２ｂの周囲側と前室４とが流路７によつて接続さ
れ、流路７の中間部には、前室４からスクリュ２に向か
う溶融材料の流れを阻止する逆流防止弁８を介在させて
ある。逆流防止弁８は、回転式開閉弁として示してある
が、往復動式開閉弁等であつてもよい。On the front side of the auxiliary screw 2b, there is provided a piston 5 slidably fitted to the large inner diameter portion 3b of the cylinder head 3. On the front side of the piston 5, the cylinder head 3 is provided.
A front chamber 4 defined by the large inner diameter portion 3b and the nozzle 6 is formed. The piston 5 comes into contact with the front end surface of the auxiliary screw 2b via a support rod 5a having a front end fixed to the piston 5. The piston 5 has a sealing mechanism 5b that slides on the large inner diameter portion 3b of the cylinder head 3.
The cylinder head 3 between the sealing mechanisms 5b and 9, that is, the portion corresponding to the support rod 5a is provided with a ventilation hole 2c for absorbing a volume change.
b. It is drilled at the rear end. Thus, the peripheral side of the auxiliary screw 2b and the front chamber 4 are connected by a flow path 7, and an intermediate portion of the flow path 7 is a backflow prevention for preventing the flow of the molten material from the front chamber 4 toward the screw 2. The valve 8 is interposed. Although the check valve 8 is shown as a rotary on-off valve, it may be a reciprocating on-off valve or the like.
【００１６】次に、上記実施例の作用について説明す
る。射出装置による第１の射出方法について説明する。
スクリュ２及びピストン５を図１に示す前進位置とし
て、逆流防止弁８を開放した状態で、回転機構２２によ
つて出力軸１７を介してスクリュ２を回転駆動すれば、
ホッパ１９から供給される成形材料が溶融混練され、ス
クリュフライトを通つて推力を受け、溶融材料が流路７
から押し出される。その際、補助スクリュ２ｂのシール
機構９が、溶融材料が前側に漏洩することを防止する。
押し出された溶融材料は、シリンダヘッド３の流路７を
通つて前室４に流入する。Next, the operation of the above embodiment will be described. A first injection method by the injection device will be described.
If the screw 2 and the piston 5 are set to the forward position shown in FIG. 1 and the check mechanism 8 is opened and the screw 2 is driven to rotate via the output shaft 17 by the rotation mechanism 22,
The molding material supplied from the hopper 19 is melt-kneaded, receives a thrust through a screw flight, and the molten material flows through the flow path 7.
Extruded from. At this time, the sealing mechanism 9 of the auxiliary screw 2b prevents the molten material from leaking to the front side.
The extruded molten material flows into the front chamber 4 through the flow path 7 of the cylinder head 3.
【００１７】ピストン５は、スクリュ２ｂの端面に接し
ているので、前室４に流入する溶融材料の反力を受けて
貯蔵量に相当する分だけ後退しようとする。このピスト
ン５が後退移動する距離に合わせてスクリュ２ｂ及びス
クリュ２ａを射出機構２３によつて一体に後退させるこ
とにより、溶融材料がスクリュ２の後退量によつて計量
される。前室４が形成されるシリンダヘッド３の大内径
部３ｂは、スクリュ２が内挿される小内径部３ａよりも
大径に形成したことにより、スクリュ２の後退移動量の
割りに大量の溶融材料を前室４に貯蔵することができ
る。スクリュ２の後退移動に伴つて、両シール機構５
ｂ，９の間の空間の空気が通気孔２ｃから外部に流出す
る。Since the piston 5 is in contact with the end face of the screw 2b, it receives the reaction force of the molten material flowing into the front chamber 4 and tries to retreat by an amount corresponding to the stored amount. The screw 2b and the screw 2a are integrally retracted by the injection mechanism 23 in accordance with the distance that the piston 5 moves backward, so that the molten material is measured by the amount of the screw 2 retracted. The large-diameter portion 3b of the cylinder head 3 in which the front chamber 4 is formed has a larger diameter than the small-diameter portion 3a into which the screw 2 is inserted, so that a large amount of molten material is required for the backward movement amount of the screw 2. Can be stored in the front room 4. As the screw 2 retreats, the two seal mechanisms 5
The air in the space between b and 9 flows out from the vent 2c to the outside.
【００１８】溶融材料の所定量が計量されて前室４に貯
蔵されたなら、逆流防止弁８を閉じて流路７からの逆流
を防止し、射出機構２３によつてスクリュ２に前進移動
を与え、前室４内の溶融材料をノズル６から金型２０に
射出する。その際、ピストン５のシール機構５ｂが、溶
融材料が後側に漏洩することを防止する。また、両シー
ル機構５ｂ，９の間の空間に通気孔２ｃからの空気が流
入する。このような射出成形機の射出装置によれば、溶
融材料は、スクリュ２の回転によつて流路７から前室４
に押し出され、その後、スクリュ２の前進によつて前室
４からノズル６を通つて金型２０に射出されるので、溶
融材料の移送機構が簡素となる。When a predetermined amount of the molten material is measured and stored in the front chamber 4, the check valve 8 is closed to prevent the backflow from the flow path 7, and the injection mechanism 23 moves the screw 2 forward. Then, the molten material in the front chamber 4 is injected from the nozzle 6 into the mold 20. At this time, the sealing mechanism 5b of the piston 5 prevents the molten material from leaking to the rear side. In addition, air from the ventilation hole 2c flows into the space between the two seal mechanisms 5b and 9. According to the injection device of such an injection molding machine, the molten material is moved from the flow path 7 by the rotation of the screw 2 to the front chamber 4.
After that, the screw 2 is advanced from the front chamber 4 to the mold 20 through the nozzle 6 by the advance of the screw 2, so that the transfer mechanism of the molten material is simplified.
【００１９】溶融材料の金型２０への射出に際し、逆流
防止弁８を閉じたが、溶融材料の粘度が比較的高い場合
には、スクリュ２とシリンダヘッド３との間の流動抵抗
が逆流を防止し、流路７からの逆流を殆ど生じないの
で、逆流防止弁８を閉じる必要はなく、この種の溶融材
料のみを扱う場合には、逆流防止弁８を省略することも
可能である。他方、溶融材料の粘度が比較的低い場合に
は、溶融材料が流路７を通つて前室４に押し出される
際、ノズル６から少量流出し、いわゆるはなだれ現象を
生ずる。これの防止のために、ノズル６にシャットオフ
弁、ニードル弁等の開閉弁を必要に応じて付属させるこ
とができる。When the molten material is injected into the mold 20, the check valve 8 is closed. However, when the viscosity of the molten material is relatively high, the flow resistance between the screw 2 and the cylinder head 3 causes the reverse flow. Since this prevents the backflow from the flow path 7, the backflow prevention valve 8 does not need to be closed. When only this kind of molten material is handled, the backflow prevention valve 8 can be omitted. On the other hand, when the viscosity of the molten material is relatively low, when the molten material is extruded into the front chamber 4 through the flow path 7, a small amount of the molten material flows out of the nozzle 6, and a so-called avalanche phenomenon occurs. To prevent this, an opening / closing valve such as a shut-off valve or a needle valve can be attached to the nozzle 6 as necessary.
【００２０】次に、射出装置による第２の射出方法につ
いて説明する。ピストン５と別個にスクリュ２のみを図
４に示す位置にまで射出機構２３によつて予め後退さ
せ、回転機構２２によつて出力軸１７を介してスクリュ
２を回転駆動する。スクリュ２の後退の際、両シール機
構５ｂ，９の間の空間に通気孔２ｃからの空気が流入す
る。このスクリュ２の後退距離は、溶融材料の所定量が
前室４にて貯蔵されるように設定させてある。ピストン
５は、その端面が支持ロッド５ａを介してスクリュ２ｂ
の端面に当接するようになつているので、前の射出工程
によつて前進位置に残されている。スクリュ２の回転に
より、ホッパ１９から供給される成形材料が溶融混練さ
れ、スクリュフライトを通つて推力を受け、溶融材料が
流路７から押し出される。その際、補助スクリュ２ｂの
シール機構９が、溶融材料が前側に漏洩することを防止
する。押し出された溶融材料は、シリンダヘッド３の流
路７を通つて前室４に貯蔵される。ピストン５は前室４
内に押し出される溶融材料の反力を受けて次第に後退す
る。その際、両シール機構５ｂ，９の間の空間の空気が
通気孔２ｃから外部に流出する。ピストン５の端面が、
支持ロッド５ａを介してスクリュ２ｂの端面に当接する
ことにより、前室４内の溶融材料の計量が終了する。Next, a second injection method by the injection device will be described. Only the screw 2 is retracted in advance by the injection mechanism 23 to the position shown in FIG. 4 separately from the piston 5, and the screw 2 is rotationally driven via the output shaft 17 by the rotating mechanism 22. When the screw 2 is retracted, air from the ventilation hole 2c flows into the space between the two seal mechanisms 5b and 9. The retreat distance of the screw 2 is set so that a predetermined amount of the molten material is stored in the front chamber 4. The end face of the piston 5 is connected to the screw 2b via the support rod 5a.
, So that it is left at the advanced position by the previous injection step. By the rotation of the screw 2, the molding material supplied from the hopper 19 is melt-kneaded, receives a thrust through a screw flight, and the molten material is extruded from the flow path 7. At this time, the sealing mechanism 9 of the auxiliary screw 2b prevents the molten material from leaking to the front side. The extruded molten material is stored in the front chamber 4 through the flow path 7 of the cylinder head 3. Piston 5 is front chamber 4
Retreats gradually due to the reaction force of the molten material extruded inside. At that time, the air in the space between the two seal mechanisms 5b and 9 flows out from the vent 2c to the outside. The end face of the piston 5
By abutting on the end face of the screw 2b via the support rod 5a, the measurement of the molten material in the front chamber 4 is completed.
【００２１】このようにして溶融材料の所定量が計量さ
れて前室４に貯蔵されたなら、第１の射出方法と同様の
手順にて、前室４内の溶融材料を金型２０に射出する。
ところで、上記の実施例にあつてはピストン５は、スク
リュ２ｂの端面に当接するように設けたが、第１の使用
方法においてはピストン５とスクリュ２とは常時一体に
移動するので、ピストン５を、支持ロッド５ａを介して
補助スクリュ２ｂの前端面に固着しても、同様の作用を
得ることができる。但し、その場合には、前述の第２の
使用方法は適用不可能である。When a predetermined amount of the molten material is measured and stored in the front chamber 4 in this way, the molten material in the front chamber 4 is injected into the mold 20 in the same procedure as in the first injection method. I do.
By the way, in the above embodiment, the piston 5 is provided so as to be in contact with the end face of the screw 2b. However, in the first method of use, the piston 5 and the screw 2 always move integrally, so that the piston 5 The same effect can be obtained by fixing the screw to the front end face of the auxiliary screw 2b via the support rod 5a. However, in that case, the above-mentioned second usage method cannot be applied.
【００２２】また、上記の実施例にあつては、スクリュ
２をスクリュ本体２ａと補助スクリュ２ｂとに分割して
構成し、補助スクリュ２ｂの前側にピストン５を配置し
たが、これは、従来のインラインスクリュ式射出装置に
おいて、従来のスクリュヘッドに替えて補助スクリュ２
ｂとピストン５とを配置した結果である。従つて、スク
リュ本体２ａと補助スクリュ２ｂとを一体に形成するこ
とも可能である。In the above embodiment, the screw 2 is divided into a screw body 2a and an auxiliary screw 2b, and the piston 5 is arranged in front of the auxiliary screw 2b. In an in-line screw type injection device, an auxiliary screw 2 replaces the conventional screw head.
This is the result of arranging the piston b and the piston 5. Therefore, the screw body 2a and the auxiliary screw 2b can be formed integrally.
【００２３】[0023]
【発明の効果】以上の説明によつて理解されるように、
本発明に係る射出成形機の射出方法及び射出装置によれ
ば、インラインスクリュ式射出成形機を用いてプリプラ
式射出成形機による射出成形方法と実質的に同様の射出
成形方法を行うことができる。すなわち、加熱筒が１
個、かつ、溶融混練装置と射出装置とが融合する構造に
なると共に、溶融材料の移送機構を簡素として、装置が
小形化するというインラインスクリュ式射出成形機の長
所を活かしつつ、特に溶融粘度の低い材料、例えば金属
の射出成形、５００℃以下にて溶融する低融点ガラスの
射出成形を行うことができる。As will be understood from the above description,
ADVANTAGE OF THE INVENTION According to the injection method and injection apparatus of the injection molding machine which concerns on this invention, the injection molding method substantially the same as the injection molding method by a pre-plastic injection molding machine can be performed using an in-line screw type injection molding machine. That is, the heating cylinder is 1
In addition, the melt-kneading device and the injection device are fused together, and the mechanism for transferring the molten material is simplified, making use of the advantages of the in-line screw type injection molding machine that the device can be downsized. Injection molding of a low material, for example, a metal, and low temperature glass having a melting point of 500 ° C. or less can be performed.
【図１】 本発明の１実施例に係る射出成形機の射出装
置を示す断面図。FIG. 1 is a sectional view showing an injection device of an injection molding machine according to one embodiment of the present invention.
【図２】 同じく射出成形機を示す一部断面図。FIG. 2 is a partial sectional view showing the same injection molding machine.
【図３】 同じく作用説明図。FIG. 3 is an explanatory view of the operation.
【図４】 同じく作用説明図。FIG. 4 is an explanatory view of the operation.
１：加熱筒、１ａ：加熱筒本体、２：スクリュ、２ａ：
スクリュ本体、２ｂ：補助スクリュ、２ｃ：通気孔、
３：シリンダヘッド、３ａ：小内径部、３ｂ：大内径
部、４：前室、５：ピストン、５ａ：支持ロッド、５
ｂ：シール機構、６：ノズル、７：流路、８：逆流防止
弁、９：シール機構、１５：射出シリンダ、１６：射出
ピストン、１９：ホッパ、２１：圧力室、２２：回転機
構、２３：射出機構。1: heating cylinder, 1a: heating cylinder main body, 2: screw, 2a:
Screw body, 2b: auxiliary screw, 2c: vent hole,
3: Cylinder head, 3a: small inner diameter portion, 3b: large inner diameter portion, 4: front chamber, 5: piston, 5a: support rod, 5
b: seal mechanism, 6: nozzle, 7: flow path, 8: check valve, 9: seal mechanism, 15: injection cylinder, 16: injection piston, 19: hopper, 21: pressure chamber, 22: rotation mechanism, 23 : Injection mechanism.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B29C 45/48 B29C 45/50 B29C 45/60 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 7 , DB name) B29C 45/48 B29C 45/50 B29C 45/60
Claims (8)
２）によつて回転されて成形材料の溶融混練を行うと共
に射出機構（２３）によつて進退駆動され、加熱筒
（１）に摺動自在に嵌合するシール機構（９）を前端部
に有するスクリュ（２）の前側に、加熱筒（１）内に摺
動自在に嵌合するピストン（５）を設け、ピストン
（５）の前側にノズル（６）に接続する前室（４）を区
画すると共に、スクリュ（２）の回転によつて押し出さ
れる溶融材料を、ピストン（５）及びシール機構（９）
を迂回する流路（７）を通して前室（４）に貯蔵した
後、スクリュ（２）によつてピストン（５）を前進さ
せ、前室（４）内の溶融材料をノズル（６）から金型
（２０）に射出することを特徴とする射出成形機の射出
方法。1. A rotating mechanism (2) inserted in a heating cylinder (1).
2) I connexion is rotated performs melt kneading of the molding material is driven by connexion moved in the injection mechanism (23), the heating cylinder
The front end of the seal mechanism (9) that slidably fits into (1)
In front of the screw (2) that Yusuke, the piston (5) slidably fitted in the heating cylinder (1) in provided, the piston (5) the front chamber to be connected to the nozzle (6) in front of ( 4) and the molten material extruded by the rotation of the screw (2) is removed by the piston (5) and the sealing mechanism (9).
After storing in the front chamber (4) through the flow path (7) bypassing the piston, the piston (5) is advanced by the screw (2), and the molten material in the front chamber (4) is transferred from the nozzle (6) through the nozzle (6). An injection method for an injection molding machine, characterized by injecting into a mold (20).
れる溶融材料を流路（７）を通して前室（４）に貯蔵す
る際、前室（４）への流入量に合わせて、ピストン
（５）及びスクリュ（２）を一体に後退させることを特
徴とする請求項１の射出成形機の射出方法。2. When the molten material extruded by the rotation of the screw (2) is stored in the front chamber (4) through the flow path (7), the piston ( The injection method of an injection molding machine according to claim 1, wherein the screw (2) and the screw (2) are retracted integrally.
れる溶融材料を流路（７）を通して前室（４）に貯蔵す
る際、溶融材料の所定量が前室（４）に貯蔵されるよう
に、予め、ピストン（５）と別個にスクリュ（２）のみ
を後退させることを特徴とする請求項１の射出成形機の
射出方法。3. When the molten material extruded by the rotation of the screw (2) is stored in the front chamber (4) through the flow path (7), a predetermined amount of the molten material is stored in the front chamber (4). The injection method of an injection molding machine according to claim 1, wherein only the screw (2) is retracted separately from the piston (5) in advance.
２）によつて回転されて成形材料の溶融混練を行うと共
に射出機構（２３）によつて進退駆動されるスクリュ
（２）の前側に、加熱筒（１）内に摺動自在に嵌合する
ピストン（５）を一体に設け、ピストン（５）の前側に
ノズル（６）に接続する前室（４）を区画すると共に、
スクリュ（２）の回転によつて押し出される溶融材料
を、ピストン（５）を迂回して設けられ、かつ、前室
（４）からスクリュ（２）に向かう溶融材料の流れを阻
止する逆流防止弁（８）を有する流路（７）を通して前
室（４）に貯蔵した後、逆流防止弁（８）によつて溶融
材料の流れを阻止した状態で、スクリュ（２）によつて
ピストン（５）を前進させ、前室（４）内の溶融材料を
ノズル（６）から金型（２０）に射出することを特徴と
する射出成形機の射出方法。4. A rotating mechanism (2) inserted into a heating cylinder (1).
It is rotated by 2) to melt and knead the molding material, and is slidably fitted into the heating cylinder (1) at the front side of the screw (2) driven forward and backward by the injection mechanism (23). A piston (5) is integrally provided, and a front chamber (4) connected to the nozzle (6) is defined on the front side of the piston (5).
The molten material extruded by the rotation of the screw (2) is provided around the piston (5), and
Block the flow of molten material from (4) to screw (2)
After being stored in the anterior chamber (4) through the flow path (7) having the check valve (8) to stop , the gas is melted by the check valve (8).
The piston (5) is advanced by the screw (2) in a state where the flow of the material is stopped, and the molten material in the front chamber (4) is injected from the nozzle (6) to the mold (20). Injection method of an injection molding machine.
２）によつて回転されて成形材料の溶融混練を行うと共
に射出機構（２３）によつて進退駆動され、加熱筒
（１）に摺動自在に嵌合するシール機構（９）を前端部
に有するスクリュ（２）の前側に、加熱筒（１）内に摺
動自在に嵌合するピストン（５）を設け、ピストン
（５）の前側にノズル（６）に接続する前室（４）を区
画すると共に、スクリュ（２）の周囲側と前室（４）と
を接続する流路（７）を、ピストン（５）及びシール機
構（９）を迂回させて設けることを特徴とする射出成形
機の射出装置。5. A rotating mechanism (2) inserted into a heating cylinder (1).
2) I connexion is rotated performs melt kneading of the molding material is driven by connexion moved in the injection mechanism (23), the heating cylinder
The front end of the seal mechanism (9) that slidably fits into (1)
In front of the screw (2) that Yusuke, the piston (5) slidably fitted in the heating cylinder (1) in provided, the piston (5) the front chamber to be connected to the nozzle (6) in front of ( 4) and a flow path (7) connecting the peripheral side of the screw (2) and the front chamber (4) is formed by a piston (5) and a sealing machine.
Injection unit of an injection molding machine, characterized in Rukoto provided to bypass the structure (9).
端面に当接可能に設けることを特徴とする請求項５の射
出成形機の射出装置。6. The injection device of an injection molding machine according to claim 5 , wherein the piston (5) is provided so as to be able to abut on a front end face of the screw (2).
介してスクリュ（２）の前端面に当接可能に設けると共
に、支持ロッド（５ａ）と対応する箇所の加熱筒（１）
に通気孔（２ｃ）を形成することを特徴とする請求項５
又は６の射出成形機の射出装置。7. A heating cylinder (1) at a position corresponding to the support rod (5a), while a piston (5) is provided so as to be able to contact the front end face of the screw (2) via a support rod (5a).
Claim and forming a vent (2c) to 5
Or the injection device of the injection molding machine of 6 .
２）によつて回転されて成形材料の溶融混練を行うと共
に射出機構（２３）によつて進退駆動されるスクリュ
（２）の前側に、加熱筒（１）内に摺動自在に嵌合する
ピストン（５）を一体に設け、ピストン（５）の前側に
ノズル（６）に接続する前室（４）を区画すると共に、
スクリュ（２）の周囲側と前室（４）とを接続する流路
（７）が、ピストン（５）を迂回させて形成され、か
つ、前室（４）からスクリュ（２）に向かう溶融材料の
流れを阻止する逆流防止弁（８）を流路（７）に備える
ことを特徴とする射出成形機の射出装置。8. A rotating mechanism (2) inserted into a heating cylinder (1).
It is rotated by 2) to melt and knead the molding material, and is slidably fitted into the heating cylinder (1) at the front side of the screw (2) driven forward and backward by the injection mechanism (23). A piston (5) is integrally provided, and a front chamber (4) connected to the nozzle (6) is defined on the front side of the piston (5).
A flow path (7) connecting the peripheral side of the screw (2) and the front chamber (4) is formed so as to bypass the piston (5) .
First, the molten material flowing from the front chamber (4) to the screw (2)
Injection unit of an injection molding machine, characterized in Rukoto provided to the check valve for preventing the flow (8) the passage (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09186293A JP3354986B2 (en) | 1993-03-29 | 1993-03-29 | Injection method and injection device for injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09186293A JP3354986B2 (en) | 1993-03-29 | 1993-03-29 | Injection method and injection device for injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06278171A JPH06278171A (en) | 1994-10-04 |
| JP3354986B2 true JP3354986B2 (en) | 2002-12-09 |
Family
ID=14038369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09186293A Expired - Fee Related JP3354986B2 (en) | 1993-03-29 | 1993-03-29 | Injection method and injection device for injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3354986B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007283489A (en) * | 2006-04-12 | 2007-11-01 | Aichi Prefecture | Injection molding method of woody material |
| LU91284B1 (en) * | 2006-11-10 | 2008-05-13 | Husky Injection Molding | Apparatus and methods for active mold decompression & melt accumulation in a shooting pot reservoir of an injection molding machine |
| JP4977258B1 (en) * | 2011-08-10 | 2012-07-18 | 株式会社日本製鋼所 | Screw for injection molding machine |
| JP7195922B2 (en) * | 2018-12-28 | 2022-12-26 | 住友重機械工業株式会社 | Injection molding machines and anti-contact covers for injection molding machines |
| KR102531416B1 (en) * | 2021-04-20 | 2023-05-12 | 주식회사 티어원 | A small injection apparatus |
-
1993
- 1993-03-29 JP JP09186293A patent/JP3354986B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06278171A (en) | 1994-10-04 |
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