JPH07227887A - Control method of thermosetting resin molding machine - Google Patents

Control method of thermosetting resin molding machine

Info

Publication number
JPH07227887A
JPH07227887A JP2438194A JP2438194A JPH07227887A JP H07227887 A JPH07227887 A JP H07227887A JP 2438194 A JP2438194 A JP 2438194A JP 2438194 A JP2438194 A JP 2438194A JP H07227887 A JPH07227887 A JP H07227887A
Authority
JP
Japan
Prior art keywords
thermosetting resin
injection
molding machine
injection screw
screw
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.)
Granted
Application number
JP2438194A
Other languages
Japanese (ja)
Other versions
JP2622080B2 (en
Inventor
Tsunemi Nemoto
恒美 根本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissei Plastic Industrial Co Ltd
Original Assignee
Nissei Plastic Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nissei Plastic Industrial Co Ltd filed Critical Nissei Plastic Industrial Co Ltd
Priority to JP2438194A priority Critical patent/JP2622080B2/en
Publication of JPH07227887A publication Critical patent/JPH07227887A/en
Application granted granted Critical
Publication of JP2622080B2 publication Critical patent/JP2622080B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/46Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50Axially movable screw

Landscapes

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

Abstract

PURPOSE:To prevent a material from sticking to a tip of an injection screw by a method wherein a thermosetting resin in an injection cylinder is discharged by making the injection screw proceed, the injection screw is retracted the most in a state that measuring is not performed, and thereafter operation of a molding machine is stopped. CONSTITUTION:When operation of a molding machine 1 is to be controlled, each part of an injection cylinder 4 is heated by each heating means 6. While a thermosetting resin is supplied from a supply hopper 3, an injection screw 5 is rotated and retracted so as to make a measure necessary for molding. The injection screw 5 is made to proceed and the thermosetting resin is injected into a mold from an injection nozzle 2. Measuring and purging operations by the injection screw 5 are repeated so as to discharge the material in the injection cylinder 4 to the outside, and the injection screw 5 is retracted to the utmost retracting position. Thereafter, energization of band heaters 8 at each heating means 6 is shut off and cool water is supplied to water jackets 7 so as to cool the injection cylinder 4, and the molding machine is stopped.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、熱硬化性樹脂成形機の
制御方法に係わり、特に、所定の生産数の成形が完了し
た時点や業務終了時、あるいは、材料終了時や生産途中
での異常発生時等における作動停止の際の制御方法に関
するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of controlling a thermosetting resin molding machine, and particularly, at the time of completion of molding of a predetermined number of products or at the end of work, or at the end of material or during production. The present invention relates to a control method for stopping operation when an abnormality occurs.

【0002】[0002]

【従来の技術】一般に、熱硬化性樹脂成形機(以下、成
形機と略称する)では、計量時における材料の流れを円
滑にし、また、射出後における金型内での熱硬化時間を
短縮するために、射出筒を加熱することが行なわれてい
る。そして、この射出筒の加熱温度は、熱硬化性樹脂
(例えば、ユリア樹脂、メラミン樹脂、フェノール樹脂
等)に、硬化に必要な熱量を与えることのないように、
その温度が設定されているとともに、先端のノズル側か
ら基端部の材料供給部へ向けて漸次低くなるような温度
勾配が与えられている。
2. Description of the Related Art Generally, in a thermosetting resin molding machine (hereinafter abbreviated as a molding machine), the flow of materials at the time of measurement is made smooth, and the thermosetting time in a mold after injection is shortened. Therefore, the injection cylinder is heated. Then, the heating temperature of the injection cylinder is set so that the thermosetting resin (for example, urea resin, melamine resin, phenol resin, etc.) is not given the amount of heat necessary for curing.
The temperature is set, and a temperature gradient that gradually decreases from the nozzle side at the tip to the material supply section at the base is provided.

【0003】ところで、所定の生産数の成形が完了した
時点や業務終了時、あるいは、材料終了時や生産途中で
の異常発生時等において、成形機の作動を停止させる必
要が生じた場合に、従来においては、次のような制御が
行なわれている。
By the way, when it is necessary to stop the operation of the molding machine at the time of completion of molding of a predetermined number of productions, at the end of work, or at the time of material termination or occurrence of abnormality during production, Conventionally, the following control is performed.

【0004】この制御方法は、熱硬化性樹脂材料が残っ
ている場合には、その供給を停止し、あるいは、射出ス
クリューの回転を停止させた状態でこの射出スクリュー
を後退させ、ついで、この射出スクリューを前後進させ
て射出筒内の材料のパージを行なったのちに、射出スク
リューを最前進位置まで前進させて、成形機を停止させ
るようにしたものである。
According to this control method, when the thermosetting resin material remains, the supply of the thermosetting resin material is stopped, or the injection screw is retracted while the rotation of the injection screw is stopped, and then the injection screw is injected. After the screw is moved forward and backward to purge the material in the injection cylinder, the injection screw is advanced to the most advanced position and the molding machine is stopped.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、このよ
うな従来の制御方法であると、次のような問題点が生じ
る。すなわち、前記従来の制御方法においては、パージ
操作を行なったのちに、射出スクリューを最前進位置に
移動させた状態で停止させるようにしているが、パージ
操作を行なったのちにおいても、射出スクリューの先端
部分には熱硬化性樹脂材料が付着しており、射出スクリ
ューを前進させた状態で停止させることにより、その先
端部分やスクリュー部分に付着した材料が射出筒の先端
部分に滞留し、この滞留させられた材料に、射出筒に設
けられている加熱部材から熱が継続して供給されること
となる。そして、この加熱温度は、通常の射出動作時に
おいては材料を硬化させるまでには至らない温度に設定
されているが、前述したように、材料が射出筒の先端部
分に滞留させられた状態に保持されると、この材料に、
材料の硬化に必要な量の熱が蓄積されて、材料が硬化し
てしまう。
However, such a conventional control method has the following problems. That is, in the conventional control method, after performing the purging operation, the injection screw is stopped in the state in which it is moved to the most forward position, but even after performing the purging operation, the injection screw Thermosetting resin material is attached to the tip part, and by stopping the injection screw while it is advanced, the material attached to the tip part or the screw part is retained in the tip part of the injection cylinder. Heat is continuously supplied to the made material from the heating member provided in the injection cylinder. The heating temperature is set to a temperature at which the material is not cured during normal injection operation, but as described above, the material is retained in the tip portion of the injection cylinder. Once retained, this material
The amount of heat required to cure the material accumulates, causing the material to cure.

【0006】このように材料が硬化すると、この材料が
射出スクリューの先端部分やその近傍のスクリュー部分
に固着し、これによって、成形再開後の計量時に、射出
筒内への材料の供給ができなくなり、成形が不可能にな
ってしまう。
When the material is hardened in this way, the material is fixed to the tip portion of the injection screw or the screw portion in the vicinity thereof, and as a result, the material cannot be fed into the injection cylinder at the time of weighing after the restart of molding. , Molding becomes impossible.

【0007】また、このような不具合を避けるために
は、成形再開に先立って、射出スクリュー先端部分にお
ける付着樹脂を取り除く作業が必要となるが、この作業
によって、成形機の可動効率の低下を招いてしまうとい
った問題点が生じる。
Further, in order to avoid such a problem, it is necessary to remove the resin adhered to the tip portion of the injection screw before restarting the molding, but this work causes a decrease in the moving efficiency of the molding machine. There is a problem such as leaving.

【0008】本発明は、前述した従来の問題点に鑑みて
なされたもので、熱硬化性樹脂成形機の作動停止時にお
いて、射出スクリューの先端部分における材料の固着を
防止し得る熱硬化性樹脂成形機の制御方法を提供するこ
とを目的とする。
The present invention has been made in view of the above-mentioned conventional problems, and is a thermosetting resin capable of preventing the material from sticking to the tip portion of the injection screw when the operation of the thermosetting resin molding machine is stopped. An object is to provide a control method for a molding machine.

【0009】[0009]

【課題を解決するための手段】本発明に係わる熱硬化性
樹脂成形機の制御方法は、前述した目的を達成するため
に、熱硬化性樹脂成形機の作動停止時において、射出ス
クリューを前進させて射出筒内の熱硬化性樹脂を排出
し、ついで、計量を行なわない状態で、前記射出スクリ
ューを強制的に最後退位置へ後退させたのちに、熱硬化
性樹脂成形機の作動を停止させることを特徴とする。
In order to achieve the above-mentioned object, a method for controlling a thermosetting resin molding machine according to the present invention is designed to advance an injection screw when the thermosetting resin molding machine is not operating. To discharge the thermosetting resin in the injection cylinder, then forcibly retreat the injection screw to the last retracted position in a state where no measurement is performed, and then stop the operation of the thermosetting resin molding machine. It is characterized by

【0010】[0010]

【作用】本発明の熱硬化性樹脂成形機の制御方法によれ
ば、射出スクリューの前進により、射出筒内の熱硬化性
樹脂が外部へ排出されてパージ操作が行なわれ、このの
ちに、前記射出筒内への熱硬化性樹脂の供給が停止され
た状態において、前記射出スクリューが最後退位置へ後
退させられ、この状態において、熱硬化性樹脂成形機の
作動が停止させられる。
According to the control method of the thermosetting resin molding machine of the present invention, the thermosetting resin in the injection cylinder is discharged to the outside by the forward movement of the injection screw, and the purging operation is performed. In a state where the supply of the thermosetting resin into the injection cylinder is stopped, the injection screw is retracted to the last retracted position, and in this state, the operation of the thermosetting resin molding machine is stopped.

【0011】そして、前述したパージ操作によって、射
出筒内の材料が外部へ排出され、その後における射出ス
クリューの強制後退により、射出スクリューの先端に付
着した熱硬化性樹脂が、この射出スクリューとともに射
出筒の後部へ引き込まれ、かつ、射出スクリューの前方
に大きな空間部が形成される。
Then, the material in the injection cylinder is discharged to the outside by the above-mentioned purging operation, and the thermosetting resin attached to the tip of the injection screw is forced to retract with the injection screw, and the thermosetting resin adhered to the injection screw together with the injection cylinder. And a large space is formed in front of the injection screw.

【0012】このように、射出スクリューが射出筒の最
後部に後退させられると、この射出筒の後部の温度が低
く設定されていることから、射出スクリューの先端部に
付着した熱硬化性樹脂へ加えられる熱量が小さく抑さえ
られ、この結果、射出スクリューへ付着した熱硬化性樹
脂の硬化が抑制される。したがって、成形再開時におい
て、射出スクリューによる熱硬化性樹脂の供給が円滑に
行なわれる。
As described above, when the injection screw is retracted to the rearmost portion of the injection cylinder, the temperature of the rear portion of the injection cylinder is set low, so that the thermosetting resin adhered to the front end portion of the injection screw is removed. The amount of heat applied is suppressed to a small amount, and as a result, the hardening of the thermosetting resin attached to the injection screw is suppressed. Therefore, when the molding is restarted, the thermosetting resin is smoothly supplied by the injection screw.

【0013】また、ノズル近傍に熱硬化性樹脂が残存し
たとしても、その量が少なく、かつ、射出筒内に大きな
空間部が形成さていることから、この熱硬化性樹脂へ熱
が加えられた場合においても、その熱が周囲の空間部へ
速やかに放熱されて、熱硬化性樹脂への蓄熱が抑制さ
れ、材料の硬化が抑制される。
Further, even if the thermosetting resin remains in the vicinity of the nozzle, the amount thereof is small, and since a large space is formed in the injection cylinder, heat is applied to the thermosetting resin. Even in such a case, the heat is quickly radiated to the surrounding space, heat storage in the thermosetting resin is suppressed, and the curing of the material is suppressed.

【0014】そして、仮に、前記ノズル内の熱硬化性樹
脂が硬化した場合においても、その残存量が少ないこと
から、成形再開時における試し打ちにより容易に除去で
き、あるいは、人手による除去を行なう場合において
も、その作業が容易となる。
Even if the thermosetting resin in the nozzle is hardened, the remaining amount is small, so that it can be easily removed by trial striking at the time of restarting molding, or if it is manually removed. Also, the work becomes easy.

【0015】[0015]

【実施例】以下、本発明の一実施例について、図面を参
照して説明する。まず、本発明が適用される熱硬化性樹
脂成形機の要部の概略について説明する。図1におい
て、符号1は熱硬化性樹脂成形機(成形機と略称する)
を示し、この成形機1は、先端に射出ノズル2を備え、
後端部に熱硬化性樹脂の供給ホッパー3を備えた射出筒
4と、この射出筒4内に、その軸線回りに回転可能に、
かつ、軸線方向に沿って前後進可能に挿着された射出ス
クリュー5と、前記射出筒4の外周に、軸線方向に沿っ
て間隔をおいて装着された複数の加熱手段6とによって
構成されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, an outline of a main part of a thermosetting resin molding machine to which the present invention is applied will be described. In FIG. 1, reference numeral 1 is a thermosetting resin molding machine (abbreviated as molding machine).
This molding machine 1 is equipped with an injection nozzle 2 at the tip,
An injection cylinder 4 having a thermosetting resin supply hopper 3 at its rear end, and in the injection cylinder 4 rotatable about its axis,
In addition, the injection screw 5 is inserted so as to be able to move forward and backward along the axial direction, and a plurality of heating means 6 are mounted on the outer periphery of the injection cylinder 4 at intervals along the axial direction. There is.

【0016】そして、前記各加熱手段6は、前記射出筒
4の周方向に沿って配設された環状のウォータージャケ
ット7と、このウォータージャケット7の外周に卷回さ
れたバンドヒーター8によって構成されており、バンド
ヒーター8の加熱作用とウォータージャケット7の冷却
作用との相乗作用により、前記射出筒4の各部位を加熱
するようになっているとともに、その加熱温度が、射出
ノズル2から供給ホッパー3へ向けて段階的に低くなる
ように設定されている。また、これらの各加熱手段6
は、成形開始時において駆動されて加熱を開始し、射出
筒4の後端側に配置された加熱手段6においては、成形
開始後に加熱作用が停止させられるようになっている。
Each heating means 6 is composed of an annular water jacket 7 arranged along the circumferential direction of the injection cylinder 4, and a band heater 8 wound around the outer circumference of the water jacket 7. Each part of the injection cylinder 4 is heated by the synergistic effect of the heating effect of the band heater 8 and the cooling effect of the water jacket 7, and the heating temperature of the injection nozzle 4 is supplied from the injection nozzle 2. It is set to gradually decrease toward 3. Also, each of these heating means 6
Is driven at the start of molding to start heating, and in the heating means 6 arranged on the rear end side of the injection cylinder 4, the heating action is stopped after the start of molding.

【0017】このような構成を有する成形機1を用いて
本実施例の制御方法について説明する。まず、成形操作
に先立って、各加熱手段6を作動させることにより、射
出筒4の各部位を所定温度に加熱し、ついで、供給ホッ
パー3からの熱硬化性樹脂Rの供給を可能な状態とした
のちに、射出スクリュー5を回転させることにより、射
出スクリュー5の前方の射出筒4内に熱硬化性樹脂Rを
送り込みつつ後退させ、成形に必要な量の熱硬化性樹脂
Rの計量を行なう(図1参照)。
The control method of this embodiment using the molding machine 1 having such a configuration will be described. First, prior to the molding operation, each heating means 6 is operated to heat each part of the injection cylinder 4 to a predetermined temperature, and then the thermosetting resin R can be supplied from the supply hopper 3. After that, by rotating the injection screw 5, the thermosetting resin R is fed back into the injection cylinder 4 in front of the injection screw 5 and is retracted to measure the amount of the thermosetting resin R required for molding. (See Figure 1).

【0018】ついで、前記射出スクリュー5を前進させ
ることにより、この射出スクリュー5の前方に供給され
ている熱硬化性樹脂Rを、射出ノズル2を介して図示し
ない金型内へ射出することにより、成形が行なわれる。
Then, by advancing the injection screw 5, the thermosetting resin R supplied in front of the injection screw 5 is injected into the mold (not shown) through the injection nozzle 2, Molding is performed.

【0019】このような成形操作が行なわれたのち、適
宜のショット数に至った際に、前記加熱手段6の内の、
前記供給ホッパー3側に設けられている加熱手段6にお
ける加熱作用が停止させられる。
After the above molding operation is performed, when the appropriate number of shots is reached, one of the heating means 6
The heating action of the heating means 6 provided on the side of the supply hopper 3 is stopped.

【0020】そして、所定数の成形が完了した場合や材
料切れが発生した場合、あるいは、何等かの異常が発生
した場合等において、これらの各状態に応じた信号が出
力されると、この信号に基づき、前記射出筒4や射出ス
クリュー5からなる射出装置を後退させて金型から離間
させる。
Then, when a signal corresponding to each of these states is output when a predetermined number of moldings are completed, when the material runs out, or when some abnormality occurs, this signal is output. Based on the above, the injection device including the injection cylinder 4 and the injection screw 5 is retracted and separated from the mold.

【0021】ついで、材料供給装置の作動を停止させた
のちに、例えば、熱硬化性樹脂Rが粒状である場合には
供給ホッパー3のシャッターを閉じて、熱硬化性樹脂R
の供給を停止させた状態とし、これより射出スクリュー
5による計量ーパージ操作を所定回数繰り返して射出筒
4内の材料を外部へ排出したのちに、図3に示すよう
に、前記射出スクリュー5を最後退位置まで強制的に後
退させる。
Next, after stopping the operation of the material supply device, for example, when the thermosetting resin R is granular, the shutter of the supply hopper 3 is closed, and the thermosetting resin R is closed.
Then, after the material in the injection cylinder 4 is discharged to the outside by repeating the metering-purge operation by the injection screw 5 a predetermined number of times, as shown in FIG. Forcibly retracts to the retracted position.

【0022】ついで、バンドヒーター8への通電を遮断
するとともに、ウォータージャケット7へ冷却水を大量
に供給して射出筒4を急速冷却したのちに、成形機の電
源を遮断して成形機を停止させる。
Then, the band heater 8 is de-energized, a large amount of cooling water is supplied to the water jacket 7 to rapidly cool the injection cylinder 4, and then the power of the molding machine is cut off to stop the molding machine. Let

【0023】このとき、前記射出スクリュー5の先端に
残存・付着している熱硬化性樹脂Rが射出スクリュー5
とともに射出筒4の後部へ引き込まれる。そして、この
射出筒4の後端部における温度が低く設定されているこ
と、さらには、加熱手段6における加熱操作が停止させ
られていることにより、射出筒4の余熱による、前記射
出スクリュー5に付着している熱硬化性樹脂Rに対する
熱の供給量が少なくて済む。したがって、このような成
形機1の停止時において射出スクリュー5に付着してい
る熱硬化性樹脂Rの硬化が防止される。
At this time, the thermosetting resin R remaining / adhering to the tip of the injection screw 5 is the injection screw 5
At the same time, it is drawn into the rear part of the injection cylinder 4. Then, the temperature at the rear end of the injection cylinder 4 is set to be low, and further, the heating operation in the heating means 6 is stopped, so that the injection screw 5 is caused by the residual heat of the injection cylinder 4. The amount of heat supplied to the adhering thermosetting resin R can be small. Therefore, when the molding machine 1 is stopped, the thermosetting resin R attached to the injection screw 5 is prevented from hardening.

【0024】さらに、射出ノズル2内に熱硬化性樹脂R
が残存している場合においても、射出スクリュー5の後
退により、射出筒4内に大きな空間部が形成されている
ことから、前記残存する熱硬化性樹脂Rからの放熱作用
が円滑に行なわれて、その温度上昇が抑制される。この
結果、射出ノズル2内に残存する熱硬化性樹脂Rの硬化
が抑制される。
Further, the thermosetting resin R is placed in the injection nozzle 2.
Even when the residual thermosetting resin R remains, a large space is formed in the injection cylinder 4 due to the backward movement of the injection screw 5, so that the heat radiation from the residual thermosetting resin R is smoothly performed. , Its temperature rise is suppressed. As a result, curing of the thermosetting resin R remaining in the injection nozzle 2 is suppressed.

【0025】したがって、これらの相乗作用により、成
形再開時おける射出スクリュー5による熱硬化性樹脂R
の送り込み操作、すなわち、計量操作が円滑に行なわれ
るとともに、試し打ちにより、射出ノズル2内に残存す
る熱硬化性樹脂Rが外部へ排出除去される。
Therefore, due to these synergistic effects, the thermosetting resin R by the injection screw 5 at the time of restarting the molding
Is smoothly performed, that is, the metering operation is performed smoothly, and the thermosetting resin R remaining in the injection nozzle 2 is discharged and removed to the outside by the trial shot.

【0026】そして、仮に、射出ノズル2内に残存する
熱硬化性樹脂Rが硬化したとしても、その量が少ないこ
とから、簡便な作業により除去可能である。
Even if the thermosetting resin R remaining in the injection nozzle 2 is hardened, it can be removed by a simple operation because the amount thereof is small.

【0027】このように、本実施例に係わる熱硬化性樹
脂成形機1の制御方法によれば、作動停止時における射
出スクリュー先端部分や射出ノズル2内の熱硬化性樹脂
Rの硬化が防止され、あるいは、射出ノズル2内に残存
する熱硬化性樹脂Rの除去作業が簡素化される。この結
果、成形再開時の熱硬化性樹脂Rの計量が円滑に行なわ
れ、また、残存熱硬化性樹脂Rの除去が円滑に行なわれ
て、成形操作が容易に再開される。
As described above, according to the control method of the thermosetting resin molding machine 1 of the present embodiment, the thermosetting resin R in the tip portion of the injection screw and the injection nozzle 2 is prevented from being hardened when the operation is stopped. Alternatively, the work of removing the thermosetting resin R remaining in the injection nozzle 2 is simplified. As a result, the thermosetting resin R is smoothly measured when the molding is restarted, and the residual thermosetting resin R is smoothly removed, so that the molding operation is easily restarted.

【0028】[0028]

【発明の効果】以上説明したように、本発明に係わる熱
硬化性樹脂成形機の制御方法は、熱硬化性樹脂成形機の
作動停止時において、射出スクリューを前進させて射出
筒内の熱硬化性樹脂を排出し、ついで、計量を行なわな
い状態で、前記射出スクリューを強制的に最後退位置へ
後退させたのちに、熱硬化性樹脂成形機の作動を停止さ
せることを特徴とするもので、次のような優れた効果を
奏する。
As described above, the method for controlling a thermosetting resin molding machine according to the present invention is such that, when the thermosetting resin molding machine is not operating, the injection screw is moved forward so that the thermosetting resin inside the injection cylinder is cured. The thermosetting resin molding machine is stopped after discharging the thermosetting resin and then forcibly retracting the injection screw to the last retracted position in a state where no measurement is performed. , And has the following excellent effects.

【0029】射出スクリューを強制後退させたのちに成
形機の停止を行なうことから、射出スクリューに付着し
ている熱硬化性樹脂を温度の低い位置へ移動させること
ができることにより、その硬化を防止することができ
る。また、射出筒の先端部内に熱硬化性樹脂が残存して
いる場合にあってもその量を減少させ、かつ、射出筒内
に大きな空間部を形成することにより、前記残存する熱
硬化性樹脂の放熱作用を高めて、その温度上昇を抑制す
ることができる。この結果、射出筒先端部内に残存する
熱硬化性樹脂の硬化を抑制することができる。そして、
仮に、射出筒先端部内に残存する熱硬化性樹脂が硬化し
たとしても、その量が少ないことから、簡便な作業によ
り除去可能である。したがって、これらの相乗作用によ
り、成形再開が円滑に行なわれる。
Since the molding machine is stopped after the injection screw is forcibly retracted, the thermosetting resin adhering to the injection screw can be moved to a position where the temperature is low, thereby preventing its hardening. be able to. Further, even if the thermosetting resin remains in the tip portion of the injection cylinder, the amount of the thermosetting resin is reduced, and by forming a large space in the injection cylinder, the residual thermosetting resin is retained. It is possible to enhance the heat radiation effect of and to suppress the temperature rise. As a result, it is possible to prevent the thermosetting resin remaining in the tip of the injection cylinder from being cured. And
Even if the thermosetting resin remaining in the tip portion of the injection cylinder is cured, it can be removed by a simple operation because the amount thereof is small. Therefore, the synergistic effect of these causes the molding to be smoothly resumed.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例が適用された熱硬化性樹脂成
形機の一例を示すもので、射出筒の要部の縦断面側面図
である。
FIG. 1 shows an example of a thermosetting resin molding machine to which an embodiment of the present invention is applied, and is a vertical cross-sectional side view of a main part of an injection cylinder.

【図2】本発明の一実施例が適用された熱硬化性樹脂成
形機の一例を示すもので、射出スクリューを最前進させ
た状態を示す射出筒の要部の縦断面側面図である。
FIG. 2 shows an example of a thermosetting resin molding machine to which an embodiment of the present invention is applied, and is a vertical cross-sectional side view of a main part of an injection cylinder showing a state where an injection screw is most advanced.

【図3】本発明の一実施例が適用された熱硬化性樹脂成
形機の一例を示すもので、成形機の作動停止時における
射出筒の要部の縦断面側面図である。
FIG. 3 shows an example of a thermosetting resin molding machine to which an embodiment of the present invention is applied, and is a vertical cross-sectional side view of the essential part of the injection cylinder when the molding machine is not operating.

【符号の説明】[Explanation of symbols]

1 (熱硬化性樹脂)成形機 2 射出ノズル 3 供給ホッパー 4 射出筒 5 射出スクリュー 6 加熱手段 1 (Thermosetting Resin) Molding Machine 2 Injection Nozzle 3 Supply Hopper 4 Injection Cylinder 5 Injection Screw 6 Heating Means

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 熱硬化性樹脂成形機の作動停止時におい
て、射出スクリューを前進させて射出筒内の熱硬化性樹
脂を排出し、ついで、計量を行なわない状態で、前記射
出スクリューを強制的に最後退位置へ後退させたのち
に、熱硬化性樹脂成形機の作動を停止させることを特徴
とする熱硬化性樹脂成形機の制御方法。
1. When the thermosetting resin molding machine is not operating, the injection screw is moved forward to discharge the thermosetting resin in the injection cylinder, and then the injection screw is forcibly operated without weighing. A method for controlling a thermosetting resin molding machine, comprising: stopping the operation of the thermosetting resin molding machine after retreating to the last retracted position.
JP2438194A 1994-02-22 1994-02-22 Control method of thermosetting resin molding machine Expired - Fee Related JP2622080B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2438194A JP2622080B2 (en) 1994-02-22 1994-02-22 Control method of thermosetting resin molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2438194A JP2622080B2 (en) 1994-02-22 1994-02-22 Control method of thermosetting resin molding machine

Publications (2)

Publication Number Publication Date
JPH07227887A true JPH07227887A (en) 1995-08-29
JP2622080B2 JP2622080B2 (en) 1997-06-18

Family

ID=12136612

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2438194A Expired - Fee Related JP2622080B2 (en) 1994-02-22 1994-02-22 Control method of thermosetting resin molding machine

Country Status (1)

Country Link
JP (1) JP2622080B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010111007A (en) * 2008-11-06 2010-05-20 Nissei Plastics Ind Co Injection molding machine for molding liquid material, and control method for the same
WO2012049296A1 (en) * 2010-10-14 2012-04-19 Kraussmaffei Technologies Gmbh Method for operating a plasticizing device of a plastic-processing machine
JP2016112863A (en) * 2014-12-18 2016-06-23 ソマール株式会社 Injection molding machine
JP2016215473A (en) * 2015-05-19 2016-12-22 東芝機械株式会社 Screw for injection molding, injection molding machine
CN106738721A (en) * 2016-12-19 2017-05-31 东莞市春诚硅橡胶机械有限公司 A kind of cylinder ejecting device of silica gel four

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010111007A (en) * 2008-11-06 2010-05-20 Nissei Plastics Ind Co Injection molding machine for molding liquid material, and control method for the same
WO2012049296A1 (en) * 2010-10-14 2012-04-19 Kraussmaffei Technologies Gmbh Method for operating a plasticizing device of a plastic-processing machine
JP2016112863A (en) * 2014-12-18 2016-06-23 ソマール株式会社 Injection molding machine
JP2016215473A (en) * 2015-05-19 2016-12-22 東芝機械株式会社 Screw for injection molding, injection molding machine
CN106738721A (en) * 2016-12-19 2017-05-31 东莞市春诚硅橡胶机械有限公司 A kind of cylinder ejecting device of silica gel four

Also Published As

Publication number Publication date
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