JPH04814B2 - - Google Patents

Info

Publication number
JPH04814B2
JPH04814B2 JP25711088A JP25711088A JPH04814B2 JP H04814 B2 JPH04814 B2 JP H04814B2 JP 25711088 A JP25711088 A JP 25711088A JP 25711088 A JP25711088 A JP 25711088A JP H04814 B2 JPH04814 B2 JP H04814B2
Authority
JP
Japan
Prior art keywords
rotation
value
mold clamping
detected
mold
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
Application number
JP25711088A
Other languages
Japanese (ja)
Other versions
JPH02106313A (en
Inventor
Masashi Nunoshita
Kenji Kasugai
Kenji Kikukawa
Yutaka Uda
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.)
Japan Steel Works Ltd
Original Assignee
Japan Steel Works 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 Japan Steel Works Ltd filed Critical Japan Steel Works Ltd
Priority to JP25711088A priority Critical patent/JPH02106313A/en
Publication of JPH02106313A publication Critical patent/JPH02106313A/en
Publication of JPH04814B2 publication Critical patent/JPH04814B2/ja
Granted legal-status Critical Current

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
    • B29C45/64—Mould opening, closing or clamping devices
    • B29C45/66—Mould opening, closing or clamping devices mechanical
    • 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
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding
    • 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
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding
    • B29C2045/5655—Injection-compression moulding using a screw mechanism as compression drive means

Landscapes

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

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は射出成形機の射出圧縮制御方法および
その装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an injection compression control method and apparatus for an injection molding machine.

〔従来の技術〕[Conventional technology]

従来の射出成形機には、例えば第５図に示すよ
うに、固定金型５と可動金型６に位置センサ５０
が設けらてており、この位置センサ５０により、
油圧制御回路５４が型締シリンダ55を駆動して行
なう金型閉鎖の際の可動金型６の位置を検出す
る。その位置検出値は、比較回路５２で、設定回
路５１に設定されている、所定の圧縮代を含む金
型閉鎖位置に相当する位置設定値と比較され、位
置検出値が位置設定値と一致したとき、金型閉鎖
を停止して、射出が開始される。その後、キヤビ
テイ１７に射出された溶融樹脂圧によつて可動金
型６が開こうとするが、位置センサ５０の位置検
出値と設定回路５１の位置設定値とを、同様に比
較し、両者の差を油圧制御回路５４へ送出して油
圧を調整し可動金型６の位置を一定範囲内に維持
して溶融樹脂を射出充填する。射出を開始して、
タイマ５３に設定されている射出時間が経過する
と、油圧制御回路５４が型締シリンダ５５を駆動
して金型閉鎖を再開して型締を行なつていた。 In a conventional injection molding machine, for example, as shown in FIG.
is provided, and this position sensor 50 allows
The hydraulic control circuit 54 drives the mold clamping cylinder 55 to detect the position of the movable mold 6 when the mold is closed. The detected position value is compared with the position set value corresponding to the mold closing position including a predetermined compression amount, which is set in the setting circuit 51, in the comparison circuit 52, and the detected position value matches the position set value. When the mold closure is stopped, injection is started. Thereafter, the movable mold 6 attempts to open due to the pressure of the molten resin injected into the cavity 17, but the position detection value of the position sensor 50 and the position setting value of the setting circuit 51 are similarly compared and The difference is sent to the hydraulic control circuit 54 to adjust the hydraulic pressure, maintain the position of the movable mold 6 within a certain range, and inject and fill the molten resin. Start injection,
When the injection time set in the timer 53 has elapsed, the hydraulic control circuit 54 drives the mold clamping cylinder 55 to restart the mold closing and perform mold clamping.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述した従来の射出成形機では、可動金型の位
置を検出する位置センサを別途に設ける必要があ
るため高価なものになる上、使用にともなう位置
センサの取付部の緩みにより位置センサの検出精
度が低下する。また、高精度の金型閉鎖制御を行
なう場合、油圧制御回路内に油圧サーボ弁を付加
することが必要となり、構成が複雑で、さらに高
価なものになるという問題点がある。 The above-mentioned conventional injection molding machine requires a separate position sensor to detect the position of the movable mold, which makes it expensive, and the detection accuracy of the position sensor deteriorates due to loosening of the mounting part of the position sensor during use. decreases. Furthermore, when performing mold closing control with high precision, it is necessary to add a hydraulic servo valve to the hydraulic control circuit, resulting in a problem that the configuration becomes complicated and expensive.

本発明は、上記従来の技術の有する問題点に鑑
みてなされたものであり、位置センサや油圧サー
ボ弁を別途に設けることなく、金型閉鎖時の金型
位置の高精度な検出を可能とする電動式射出成形
機の射出圧縮制御法方およびその装置を提供する
ことを目的とする。 The present invention has been made in view of the above-mentioned problems of the conventional technology, and enables highly accurate detection of the mold position when the mold is closed, without separately providing a position sensor or a hydraulic servo valve. An object of the present invention is to provide an injection compression control method and apparatus for an electric injection molding machine.

〔課題を解決するための手段〕[Means to solve the problem]

本発明の電動式射出成形機の射出圧縮制御方法
は、 型締用電動機が型締機構を駆動して金型と型締
めを行なうものであつて、型開き状態の金型を、
型締用電動機を低トルク回転して閉鎖し、該閉鎖
動作中の型締用電動機の回転度合を回転検出器に
よつて検出し、その回転検出値を、予め設定され
ている所定の圧縮代を含む金型閉鎖位置に相当す
る回転設定値と比較して、回転検出値が回転設定
値と一致したとき樹脂の射出を開始し、射出動作
中、同様に型締用電動機の回転度合を検出してそ
の回転検出値と前記回転設定値を比較し、その差
に応じて型締用電動機の回転度合を回転設定値に
保つとともに、樹脂の射出量を検出してその検出
値を予め設定されている所定の射出量に相当する
設定値と比較し、検出値が設定値と一致したと
き、型締用電動機を高トルク回転させて型締めを
行なうものである。 In the injection compression control method for an electric injection molding machine of the present invention, a mold clamping electric motor drives a mold clamping mechanism to clamp the mold, and the mold is in an open state.
The mold clamping electric motor is rotated at low torque to close the mold, the rotation degree of the mold clamping electric motor during the closing operation is detected by a rotation detector, and the detected rotation value is applied to a predetermined compression amount. Compare the rotation setting value corresponding to the mold closing position including The rotation detection value is compared with the rotation setting value, and the rotation degree of the mold clamping motor is maintained at the rotation setting value according to the difference, and the injection amount of resin is detected and the detected value is set in advance. The detected value is compared with a set value corresponding to a predetermined injection amount, and when the detected value matches the set value, the mold clamping motor is rotated at high torque to perform mold clamping.

また、その射出圧縮制御装置は、 型締機構を駆動するための、低トルク回転およ
び高トルク回転可能な型締用電動機１４を備え、 型締用電動機１４の回転度合を検出する回転検
出器１６と、 所定の圧縮代を含む金型閉鎖位置に相当する、
型締用電動機１４の回転度合を予め設定する位置
設定器１８と、 可動金型６の閉鎖動作中、回転検出器１６が検
出した回転検出値と位置設定器１８に設定されて
いる回転設定値とを比較して回転検出値が回転設
定値と一致したとき、射出装置１５へ射出開始指
示を出力し、射出開始後、同様に前記回転検出値
と回転設定値を比較してその値に応じて型締用電
動機１４の回転度合を回転設定値に保持するとと
もに、型締用電動機１４の高トルク回転指示を受
けたとき、型締用電動機１４を高トルク回転させ
るドライバアンプ２１と、 射出開始後のキヤビテイ１７への樹脂の射出量
を検出し、その検出値を予め設定されている所定
の射出量に相当する設定値と比較して検出値が設
定値と一致したとき、コントロール信号を出力す
る信号出力装置１９と、 信号出力装置１９が出力したコントロール信号
を受けて、ドライバアンプ２１へ高トルク回転指
示を出力するコントローラ20とを有するものであ
る。 The injection compression control device also includes a mold clamping electric motor 14 capable of low torque rotation and high torque rotation for driving the mold clamping mechanism, and a rotation detector 16 that detects the degree of rotation of the mold clamping electric motor 14. and corresponds to the mold closing position including the predetermined compression allowance,
A position setting device 18 that presets the degree of rotation of the mold clamping electric motor 14; and a rotation detection value detected by the rotation detector 16 during the closing operation of the movable mold 6 and a rotation setting value set in the position setting device 18. When the detected rotation value matches the set rotation value, an injection start instruction is output to the injection device 15, and after the start of injection, the detected rotation value and the set rotation value are similarly compared and the process responds accordingly. a driver amplifier 21 that holds the rotation degree of the mold clamping electric motor 14 at a rotation setting value and rotates the mold clamping electric motor 14 with high torque when receiving a high torque rotation instruction of the mold clamping electric motor 14; Detects the amount of resin injected into the subsequent cavity 17, compares the detected value with a set value corresponding to a predetermined injection amount, and outputs a control signal when the detected value matches the set value. The controller 20 receives the control signal output from the signal output device 19 and outputs a high torque rotation instruction to the driver amplifier 21.

〔作用〕[Effect]

型開き状態の金型を、まず、型締用電動機を低
トルク回転させて閉鎖し、その際、可動金型の位
置を型締用電動機の回転度合によつて検出し、そ
の回転検出値が予め設定されている所定の圧縮代
を含む金型閉鎖位置に相当する回転設定値に達し
たとき射出を開始する。射出開始後、キヤビテイ
内の樹脂の充填が進んで樹脂圧により可動金型が
押されて、その位置が前記金型閉鎖位置から外れ
ることがあるが、射出動作中も同様に、型締用電
動機の回転度合を検出してその回転検出値と前記
回転設定値を比較し、その差に応じて型締用電動
機の回転度合を回転設定値に保持してサーボロツ
ク状態とする。そして、所定の樹脂がキヤビテイ
に射出された後、型締用電動機を高トルク回転さ
せて型締めし、キヤビテイ内の溶融樹脂を圧縮す
るものである。 The open mold is first closed by rotating the mold clamping motor at low torque. At this time, the position of the movable mold is detected by the rotation degree of the mold clamping motor, and the detected rotation value is Injection is started when a rotation set value corresponding to a mold closing position including a predetermined compression amount is reached. After the start of injection, the resin filling in the cavity progresses and the movable mold is pushed by the resin pressure, and its position may deviate from the mold closing position. The rotation degree of the mold clamping motor is detected and the detected rotation value is compared with the rotation setting value, and the rotation degree of the mold clamping motor is maintained at the rotation setting value according to the difference, and a servo lock state is established. After a predetermined amount of resin is injected into the cavity, the mold clamping electric motor is rotated at high torque to clamp the mold and compress the molten resin in the cavity.

〔実施例〕〔Example〕

次に、本発明の実施例について図面を参照して
説明する。 Next, embodiments of the present invention will be described with reference to the drawings.

第１図は本発明の射出圧縮制御装置の一実施例
を示すブロツク図である。 FIG. 1 is a block diagram showing an embodiment of the injection compression control device of the present invention.

この実施例では、固定盤１は複数のタイバー４
を介して型締ハウジング３と連結されている。ま
た、固定盤１と型締ハウジング３との間には、タ
イバー４に案内されてその軸方向に往復移動する
可動盤２が取付けられている。型締ハウジング３
の下方には型締用電動機１４が取付けられてお
り、その出力軸には駆動プーリー１３が設けられ
ている。さらに、この型締ハウジング３には、ベ
アリング１０ａ，１０ｂによつて支持された段付
き円筒上の回転軸９が回転可能に設けられてお
り、その一端には従動プーリー１１が固着されて
いる。そして、駆動プーリー１３と従動プーリー
１１とはタイミングベルト１２によつて連結され
ており、型締用電動機１４が駆動プーリー１３、
タイミングベルト１２および従動プーリー１１を
介して回転軸９を回転させる。また、回転軸９の
他端にはボールナツト８が嵌入固着されており、
回転軸９とともに回転する。可動盤２には、ボー
ルネジ７の一端が回転しないように結合され、そ
の他端はボールナツト８に螺合し、ボールナツト
８の回転にともなつてボールネジ７が軸方向に往
復動して可動盤２をダイバー４の軸方向に往復移
動させ得るように構成した型締機構を備えてい
る。そして、固定盤１には固定金型５を取付け、
可動盤２には可動金型６を取付けて、型締用電動
機１４を正転させることにより可動盤２を前進さ
せて金型閉鎖を行ない、型締用電動機１４を逆回
転させるとにより可動盤２を交替させて型開きを
行なう。 In this embodiment, the fixed platen 1 has a plurality of tie bars 4.
It is connected to the mold clamping housing 3 via. Furthermore, a movable platen 2 is installed between the fixed platen 1 and the mold clamping housing 3 and is guided by the tie bars 4 and reciprocates in the axial direction thereof. Mold clamping housing 3
A mold clamping electric motor 14 is attached below, and a drive pulley 13 is provided on its output shaft. Furthermore, a stepped cylindrical rotating shaft 9 supported by bearings 10a and 10b is rotatably provided in the mold clamping housing 3, and a driven pulley 11 is fixed to one end of the rotating shaft 9. The driving pulley 13 and the driven pulley 11 are connected by a timing belt 12, and the mold clamping electric motor 14 is connected to the driving pulley 13,
The rotating shaft 9 is rotated via the timing belt 12 and the driven pulley 11. Further, a ball nut 8 is fitted and fixed to the other end of the rotating shaft 9.
It rotates together with the rotating shaft 9. One end of a ball screw 7 is connected to the movable platen 2 so as not to rotate, and the other end is screwed into a ball nut 8. As the ball nut 8 rotates, the ball screw 7 reciprocates in the axial direction to move the movable platen 2. A mold clamping mechanism configured to allow the diver 4 to reciprocate in the axial direction is provided. Then, the fixed mold 5 is attached to the fixed platen 1,
A movable mold 6 is attached to the movable platen 2, and by rotating the mold clamping electric motor 14 in the forward direction, the movable platen 2 is advanced to close the mold, and by rotating the mold clamping electric motor 14 in the reverse direction, the movable platen is closed. Open the mold by alternating parts 2 and 2.

型締用電動機１４にはロータリエンコーダから
成る回転検出器１６が備えられており、この回転
検出器１６により、可動金型６の移動位置を示す
型締用電動機１４の回転度合を検出し、その回転
検出値をドライバアンプ２１へ出力する。ドライ
バアンプ２１は、回転検出器１６が検出した回転
検出値と位置設定器１８に予め設定されている、
設定の圧縮代を含む金型閉鎖位置に相当する回転
度合とを比較し、回転検出値が回転設定値と一致
したとき、射出装置１５へ射出開始指示を出力す
る。また、ドライバアンプ２１は、射出開始後、
同様に回転検出値と回転設定値を比較し、その差
に応じて型締用電動機１４の回転度合が回転設定
値に一致するように型締用電動機１４を制御して
サーボロツク状態とするとともに、コントローラ
２０から高トルク回転指示を受けたとき、型締用
電動機１４を高トルク回転させて型締めを行な
う。信号出力装置１９は、射出開始後、キヤビテ
イ１７内への樹脂の射出量を検出し、その検出値
と予め設定されている所定の射出量に相当する設
定値とを比較して、検出値が設定値と一致したと
き、コントロール信号をコントローラ２０へ出力
する。コントローラ２０は信号出力装置１９から
のコントロール信号を受けたとき、高トルク回転
指示をドライバアンプ２１へ出力する。 The mold clamping motor 14 is equipped with a rotation detector 16 consisting of a rotary encoder, and this rotation detector 16 detects the degree of rotation of the mold clamping motor 14 that indicates the moving position of the movable mold 6. The detected rotation value is output to the driver amplifier 21. The driver amplifier 21 has the rotation detection value detected by the rotation detector 16 and the position setter 18 set in advance.
The rotation degree corresponding to the mold closing position including the set compression allowance is compared, and when the rotation detection value matches the rotation setting value, an injection start instruction is output to the injection device 15. Further, the driver amplifier 21, after the start of injection,
Similarly, the detected rotation value and the rotation setting value are compared, and according to the difference, the mold clamping electric motor 14 is controlled so that the degree of rotation of the mold clamping electric motor 14 matches the rotation setting value, and the servo lock state is established. When a high torque rotation instruction is received from the controller 20, the mold clamping electric motor 14 is rotated with high torque to perform mold clamping. After the injection starts, the signal output device 19 detects the amount of resin injected into the cavity 17, compares the detected value with a preset value corresponding to a predetermined injection amount, and determines whether the detected value is When the value matches the set value, a control signal is output to the controller 20. When the controller 20 receives the control signal from the signal output device 19, it outputs a high torque rotation instruction to the driver amplifier 21.

次に、射出動作中の樹脂の射出量を検出する信
号出力装置１９の具体的な実施例について説明す
る。 Next, a specific embodiment of the signal output device 19 for detecting the amount of resin injected during the injection operation will be described.

まず、第２図に示す第一実施例について説明す
る。 First, a first embodiment shown in FIG. 2 will be described.

この実施例では、信号出力装置としてタイマ回
路２２を備えている。このタイマ回路２２は、射
出開始から所定の樹脂が射出されるまでの射出時
間が予め設定されており、ドライバアンプ２１が
射出開始指示を出力した後動作して、射出時間経
過後コントロール信号としてコントローラ２０へ
タイマ満了信号を出力する。 This embodiment includes a timer circuit 22 as a signal output device. This timer circuit 22 has an injection time set in advance from the start of injection until a predetermined amount of resin is injected, and operates after the driver amplifier 21 outputs an injection start instruction, and sends a control signal to the controller after the elapse of the injection time. A timer expiration signal is output to 20.

次に、第３図に示す第二実施例について説明す
る。 Next, a second embodiment shown in FIG. 3 will be described.

この実施例では、固定金型５に金型内樹脂圧を
検出する圧力検出器２３を設け、その圧力検出値
と金型内圧力設定器２４に予め設定されている、
所定の樹脂が射出されたときの金型内樹脂圧に相
当する設定値とを比較する金型内圧力比較器２５
を備えている。この金型内圧力比較器２５は、圧
力検出値と設定値とを比較し、圧力検出値が設定
値と一致したとき、コントロール信号をコントロ
ーラ２０へ出力する。 In this embodiment, the fixed mold 5 is provided with a pressure detector 23 that detects the resin pressure inside the mold, and the detected pressure value and the inside mold pressure setter 24 are set in advance.
An in-mold pressure comparator 25 that compares the pressure in the mold with a set value corresponding to the resin pressure in the mold when a predetermined resin is injected.
It is equipped with The in-mold pressure comparator 25 compares the detected pressure value with a set value, and outputs a control signal to the controller 20 when the detected pressure value matches the set value.

つづいて、第４図に示す第三実施例について説
明する。 Next, a third embodiment shown in FIG. 4 will be described.

この実施例では、射出装置１５のスクリユの移
動ストロークを検出するクスリユ位置検出器２６
を備えており、さらに、その位置検出値とスクリ
ユ位置設定器２７に予め設定されている、所定の
樹脂が射出されたときのスクリユストロークに相
当する設定値とを比較するスクリユ位置比較器２
８を有している。このスクリユ位置比較器２８は
位置検出値と設定値を比較して、位置検出値が設
定値と一致したとき、コントロール信号をコント
ローラ２０へ出力する。 In this embodiment, a drug position detector 26 that detects the movement stroke of the screw of the injection device 15 is used.
and a screw position comparator 2 that compares the detected position value with a set value corresponding to the screw stroke when a predetermined resin is injected, which is preset in the screw position setter 27.
It has 8. The screw position comparator 28 compares the detected position value and the set value, and outputs a control signal to the controller 20 when the detected position value matches the set value.

次に、本実施例の動作について説明する。 Next, the operation of this embodiment will be explained.

まず、型開き状態の固定金型５と可動金型６
を、型締用電動機１４を低トルク回転させて閉鎖
する。このとき、可動金型６の位置を型締用電動
機１４の回転度合で検出し、その回転検出値が予
め設定されている金型閉鎖位置に相当する回転度
合に達したとき金型閉鎖を停止してサーボロツク
状態として射出を開始する。その後、キヤビテイ
１７への樹脂の射出量を射出時間、キヤビテイ１
７内樹脂圧あるいはスクリユストローク等で検出
して、その検出値が予め設定されている所定の射
出量に相当する設定値に達したとき、型締用電動
機１４の高トルク回転による金型閉鎖が開始され
てキヤビテイ１７内の溶融樹脂が圧縮されること
になる。 First, the fixed mold 5 and the movable mold 6 in the open state
is closed by rotating the mold clamping electric motor 14 at low torque. At this time, the position of the movable mold 6 is detected by the rotation degree of the mold clamping electric motor 14, and when the detected rotation value reaches the rotation degree corresponding to a preset mold closing position, the mold closing is stopped. Then, the servo is locked and injection starts. After that, the amount of resin injected into cavity 17 is determined by the injection time and the amount of resin injected into cavity 17.
When the detected value reaches a preset value corresponding to a predetermined injection amount, the mold is closed by high-torque rotation of the mold clamping electric motor 14. is started, and the molten resin in the cavity 17 is compressed.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、可動金型の閉鎖
動作を、回転検出器によつて型締用電動機の回転
度合を検出して制御するので、型締用電動機に回
転検出器を取付けるという簡単な構成で、射出動
作中の可動金型位置の保持が容易に制御でき、ま
た、回転検出器の分解能は一般に1000パルス／１
回転以上であるので、高精度な金型閉鎖の制御が
容易に行なえるという効果がある。 As explained above, the present invention uses a rotation detector to control the closing operation of a movable mold by detecting the degree of rotation of the mold clamping electric motor. With this configuration, the movable mold position can be easily controlled during injection operation, and the resolution of the rotation detector is generally 1000 pulses/1.
Since the rotation is more than that, there is an effect that the mold closing can be easily controlled with high accuracy.

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

第１図は本発明の射出圧縮制御装置の一実施例
を示すブロツク図、第２図〜第４図は第１図の信
号出力装置１９の具体的な実施例を示すブロツク
図、第５図は従来例を示すブロツク図である。 １……固定盤、２……可動盤、３……型締ハウ
ジング、４……タイバー、５……固定金型、６…
…可動金型、７……ボールネジ、８……ボールナ
ツト、９……回転軸、１０ａ，１０ｂ……ベアリ
ング、１１……従動プーリー、１２……タイミン
グベルト、１３……駆動プーリー、１４……型締
用電動機、１５……射出装置、１６……回転検出
器、１７……キヤビテイ、１８……位置設定器、
１９……信号出力装置、２０……コントローラ、
２１……ドライバアンプ、２２……タイマ回路、
２３……圧力検出器、２４……金型内圧力設定
器、２５……金型内圧力比較器、２６……スクリ
ユ位置検出器、２７……スクリユ位置設定器、２
８……スクリユ位置比較器。 FIG. 1 is a block diagram showing one embodiment of the injection compression control device of the present invention, FIGS. 2 to 4 are block diagrams showing a specific embodiment of the signal output device 19 of FIG. 1, and FIG. 1 is a block diagram showing a conventional example. 1...Fixed plate, 2...Movable plate, 3...Mold clamping housing, 4...Tie bar, 5...Fixed mold, 6...
...Movable mold, 7... Ball screw, 8... Ball nut, 9... Rotating shaft, 10a, 10b... Bearing, 11... Driven pulley, 12... Timing belt, 13... Drive pulley, 14... Model Tightening motor, 15... Injection device, 16... Rotation detector, 17... Cavity, 18... Position setting device,
19...Signal output device, 20...Controller,
21...driver amplifier, 22...timer circuit,
23...Pressure detector, 24...In-mold pressure setting device, 25...In-mold pressure comparator, 26...Screw position detector, 27...Screw position setting device, 2
8... Screw position comparator.

Claims (1)

【特許請求の範囲】 １ 型締用電動機が型締機構を駆動して金型の型
締めを行なうものであつて、型開き状態の金型
を、型締用電動機を低トルク回転して閉鎖し、該
閉鎖動作中の型締用電動機の回転度合を回転検出
器によつて検出し、その回転検出値を、予め設定
されている所定の圧縮代を含む金型閉鎖位置に相
当する回転設定値と比較して、回転検出値が回転
設定値と一致したとき樹脂の射出を開始し、射出
動作中、同様に型締用電動機の回転度合を検出し
てその回転検出値と前記回転設定値を比較し、そ
の差に応じて型締用電動機の回転度合を回転設定
値に保つとともに、樹脂の射出量を検出してその
検出値を予め設定されている所定の射出量に相当
する設定値と比較し、検出値が設定値と一致した
とき、型締用電動機を高トルク回転させて型締め
を行なう電動式射出成形機の射出圧縮制御方法。 ２ 型締機構を駆動するための、低トルク回転お
よび高トルク回転可能な型締用電動機１４を備
え、型締用電動機１４の回転度合を検出する回転
検出器１６と、 所定の圧縮代を含む金型閉鎖位置に相当する、
型締用電動機１４の回転度合を予め設定する位置
設定器１８と、 可動金型６の閉鎖動作中、回転検出器１６が検
出した回転検出値と位置設定器１８に設定されて
いる回転設定値とを比較して回転検出値が回転設
定値そを一致したとき、射出装置１５へ射出開始
指示を出力し、射出開始後、同様に前記回転検出
値と回転設定値を比較してその差に応じて型締用
電動機１４の回転度合を回転設定値に保持すると
ともに、型締用電動機１４の高トルク回転指示を
受けたとき、型締用電動機１４を高トルク回転さ
せるドライバアンプ２１と、 射出開始後のキヤビテイ１７への樹脂の射出量
を検出し、その検出値を予め設定されている所定
の射出量に相当する設定値と比較して検出値が設
定値と一致したとき、コントロール信号を出力す
る信号出力装置１９と、 信号出力装置１９が出力したコントロール信号
を受けて、ドライバアンプ２１へ高トルク回転指
示を出力するコントローラ２０とを有する電動式
射出成形機の射出圧縮制御装置。[Scope of Claims] 1. A mold clamping motor drives a mold clamping mechanism to clamp a mold, and the mold in an open state is closed by rotating the mold clamping motor at low torque. The degree of rotation of the mold clamping electric motor during the closing operation is detected by a rotation detector, and the detected rotation value is set as a rotation setting corresponding to a mold closing position including a predetermined compression amount. When the rotation detection value matches the rotation setting value, resin injection is started, and during the injection operation, the rotation degree of the mold clamping motor is similarly detected and the rotation detection value and the rotation setting value are compared. The rotation degree of the mold clamping motor is maintained at the rotation setting value according to the difference, and the injection amount of resin is detected and the detected value is set to a preset value corresponding to the predetermined injection amount. An injection compression control method for an electric injection molding machine that performs mold clamping by rotating the mold clamping motor at high torque when the detected value matches the set value. 2. Equipped with a mold clamping electric motor 14 capable of low-torque rotation and high-torque rotation for driving the mold clamping mechanism, including a rotation detector 16 for detecting the degree of rotation of the mold clamping electric motor 14, and a predetermined compression allowance. Corresponds to the mold closed position,
A position setting device 18 that presets the degree of rotation of the mold clamping electric motor 14; and a rotation detection value detected by the rotation detector 16 during the closing operation of the movable mold 6 and a rotation setting value set in the position setting device 18. When the detected rotation value matches the set rotation value, an injection start instruction is output to the injection device 15, and after the start of injection, the detected rotation value and the set rotation value are similarly compared and the difference is determined. a driver amplifier 21 that maintains the rotation degree of the mold clamping electric motor 14 at a rotational setting value in response to the mold clamping electric motor 14, and rotates the mold clamping electric motor 14 with high torque when receiving a high torque rotation instruction of the mold clamping electric motor 14; The amount of resin injected into the cavity 17 after the start is detected, and the detected value is compared with a preset value corresponding to a predetermined injection amount. When the detected value matches the set value, a control signal is activated. An injection compression control device for an electric injection molding machine, comprising: a signal output device 19 that outputs signals; and a controller 20 that receives a control signal output from the signal output device 19 and outputs a high torque rotation instruction to a driver amplifier 21.
JP25711088A 1988-10-14 1988-10-14 Injecting compression control method of electrical injection molding machine and apparatus thereof Granted JPH02106313A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25711088A JPH02106313A (en) 1988-10-14 1988-10-14 Injecting compression control method of electrical injection molding machine and apparatus thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25711088A JPH02106313A (en) 1988-10-14 1988-10-14 Injecting compression control method of electrical injection molding machine and apparatus thereof

Publications (2)

Publication Number Publication Date
JPH02106313A JPH02106313A (en) 1990-04-18
JPH04814B2 true JPH04814B2 (en) 1992-01-08

Family

ID=17301872

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25711088A Granted JPH02106313A (en) 1988-10-14 1988-10-14 Injecting compression control method of electrical injection molding machine and apparatus thereof

Country Status (1)

Country Link
JP (1) JPH02106313A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19842385A1 (en) * 1998-09-16 2000-03-30 Mannesmann Vdo Ag Device and method for injection stamping
AU2001229946A1 (en) * 2000-02-09 2001-08-20 Netstal-Maschinen Ag Method of controlling/regulating an embossing procedure and drive and control device for injection molding machines

Also Published As

Publication number Publication date
JPH02106313A (en) 1990-04-18

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