JPH0253212B2 - - Google Patents

Info

Publication number
JPH0253212B2
JPH0253212B2 JP1089960A JP8996089A JPH0253212B2 JP H0253212 B2 JPH0253212 B2 JP H0253212B2 JP 1089960 A JP1089960 A JP 1089960A JP 8996089 A JP8996089 A JP 8996089A JP H0253212 B2 JPH0253212 B2 JP H0253212B2
Authority
JP
Japan
Prior art keywords
screw
shaft
injection
holding member
drive source
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 - Lifetime
Application number
JP1089960A
Other languages
Japanese (ja)
Other versions
JPH0248912A (en
Inventor
Yoshihiko Yamazaki
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 JP8996089A priority Critical patent/JPH0248912A/en
Publication of JPH0248912A publication Critical patent/JPH0248912A/en
Publication of JPH0253212B2 publication Critical patent/JPH0253212B2/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
    • B29C45/46—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
    • B29C45/5008—Drive means therefor
    • 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
    • B29C45/5008—Drive means therefor
    • B29C2045/5076—Drive means therefor using a single drive motor for rotary and for axial movements of the screw

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (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］ この発明は電動機を駆動源として合成樹脂の射
出を行うインラインスクリユ式電動射出装置に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an in-line screw type electric injection device that injects synthetic resin using an electric motor as a driving source.

［従来技術］ 電動式射出装置としては実公昭39−10424号公
報に記載されたプランジヤ式のものが公知となつ
ている。[Prior Art] As an electric injection device, a plunger type device described in Japanese Utility Model Publication No. 39-10424 is well known.

この射出装置は一対のタイバーに摺動板を支持
させ、その摺動板の前部にプランジヤを、後部に
キー溝を軸方向に有するねじ軸を連結し、そのね
じ軸に定位置にて回転するプーリーを螺合すると
ともに、キー溝と嵌合するキーを備えたウオーム
ホイールを設け、このウオームホイールとプーリ
ー及びねじ軸とにより、電動機による回転力をプ
ランジヤの推力に変換して射出を行うようにして
いる。 This injection device has a sliding plate supported by a pair of tie bars, a plunger is connected to the front of the sliding plate, and a screw shaft with a keyway in the axial direction is connected to the rear of the sliding plate, and the screw shaft rotates at a fixed position. In addition, a worm wheel with a key that fits into a keyway is provided, and the worm wheel, pulley, and screw shaft convert the rotational force of the electric motor into the thrust of the plunger to perform injection. I have to.

［発明が解決しようとする課題］ このプランジヤ式射出装置では、ねじ軸ととも
にプランジヤが直線運動して射出を行うため、ね
じ軸の回転を阻止するキー等の部材や抵抗機等が
必要となり、またプーリーとねじ軸との螺合に特
別な手段が講じられていないので、回転力を直線
運動に変換する際の抵抗が大きく、伝動効率も著
しく悪いことから、高出力の電動機を必要とす
る。[Problems to be Solved by the Invention] In this plunger-type injection device, since the plunger moves linearly with the screw shaft to perform injection, members such as keys and resistors are required to prevent rotation of the screw shaft. Since no special measures are taken to thread the pulley and screw shaft, there is a large resistance when converting rotational force into linear motion, and the transmission efficiency is extremely poor, so a high-output electric motor is required.

これまで一般に使用されていた通常の電動機
は、電動機の起動、停止、急加減速制御の点に難
点があり、トルク制御も困難で、低速度から定格
速度までの広範囲を高精度に制御できないとの理
由から、高速応答性を必要とするインラインスク
リユ式射出装置の駆動源とは使用し難いものであ
つた。 Conventional electric motors that have been commonly used until now have difficulties in starting, stopping, and controlling sudden acceleration and deceleration. Torque control is also difficult, and it is difficult to control a wide range from low speed to rated speed with high precision. For these reasons, it has been difficult to use it as a drive source for an in-line screw type injection device that requires high-speed response.

さらにまた、高速応答性に優れた電動機を使用
しても、インラインスクリユ式では、プランジヤ
式と異なつて、スクリユを回転しながら背圧力を
制御して材料樹脂の可塑化を行う計量工程があ
り、この計量工程が伝動効率の悪さから困難であ
ると、インラインスクリユ式としては用をなさ
ず、従つて電動機を射出駆動源とするインライン
スクリユ式射出装置としては、伝動効率と電動機
の二つの問題の解決が課題となつている。 Furthermore, even though an electric motor with excellent high-speed response is used, the in-line screw type, unlike the plunger type, requires a metering process in which the back pressure is controlled while rotating the screw to plasticize the material resin. If this metering process is difficult due to poor transmission efficiency, the in-line screw type is of no use.Therefore, as an in-line screw type injection device that uses an electric motor as the injection drive source, there are two issues: transmission efficiency and the electric motor. The challenge is to solve two problems.

この発明は上記課題を解決するために考えられ
たものであつて、その目的は、簡単な構成で回転
力を直線運動にスムーズに変換でき、また応答性
のよい電動機の利用により高精度の速度制御や背
圧制御などを行い得る新たなインラインスクリユ
式射出装置を提供することにある。 This invention was devised to solve the above problems, and its purpose is to smoothly convert rotational force into linear motion with a simple configuration, and to achieve high precision speed by using a highly responsive electric motor. The object of the present invention is to provide a new in-line screw type injection device that can perform control and back pressure control.

［課題を解決するための手段］ 上記目的によるこの発明の特徴は、後端に延長
軸を有する射出加熱筒内のスクリユと、その延長
軸を介してスクリユを回転自在に保持し、かつス
クリユとともに進退移動する保持部材と、そのス
クリユ保持部材に設けられたねじ受部材と螺合
し、射出駆動源からの回転力を該ねじ受部材とに
より直接運動に変換してスクリユ保持部材をスク
リユと供に前進移動させる定位置のねじ軸とから
なり、そのねじ軸とねり受部材との上記螺合をボ
ールを介して行うとともに、上記射出駆動源をサ
ーボモータとしてなることにある。[Means for Solving the Problems] The features of the present invention according to the above-mentioned objects include a screw in the injection heating cylinder having an extension shaft at the rear end, a screw rotatably held via the extension shaft, and A holding member that moves forward and backward is screwed together with a screw receiving member provided on the screw holding member, and the rotational force from the injection drive source is converted into direct motion by the screw receiving member, so that the screw holding member is connected to the screw. It consists of a screw shaft that is moved forward at a fixed position, and the threaded engagement between the screw shaft and the torsion receiving member is performed via a ball, and the injection drive source is a servo motor.

［作用］ 上記構成では、サーボモータが回転作動する
と、スクリユ保持部材側のねじ受部材と螺合した
ねじ軸が回転する。このねじ軸は回転により移動
することはないので、スクリユ保持部材側が前進
移動する。これによりスクリユも射出加熱筒内を
前進移動して射出を行う。[Operation] In the above configuration, when the servo motor rotates, the screw shaft screwed into the screw receiving member on the screw holding member side rotates. Since this screw shaft does not move due to rotation, the screw holding member side moves forward. As a result, the screw also moves forward within the injection heating cylinder to perform injection.

また射出加熱筒内の材料の送り圧によりスクリ
ユに後退力が作用したときには、その後退力によ
りねじ軸が回転して、スクリユと共にスクリユ保
持部材が後退移動するのを許容する。 Further, when a retreating force is applied to the screw due to the feeding pressure of the material in the injection heating cylinder, the screw shaft rotates due to the retreating force, allowing the screw holding member to move backward together with the screw.

以下この発明を図面に示す実施例により詳細に
説明する。 The present invention will be explained in detail below with reference to embodiments shown in the drawings.

［実施例］ 図中１は型締装置、２は射出装置を示す。型締
装置１は、機台３上の一対の固定盤１０，１１に
架設したタイバー１２と、該タイバー１２に移動
自在に取付けた可動盤１３とを有する。上記一方
の固定盤１１と可動盤１３との対向面には、それ
ぞれ金型１４，１４が設けてあり、また可動盤１
３の反対面にはねじ軸１５が突設してある。この
ねじ軸１５は、他方の固定盤１０に回動自在に装
着した回転盤１６にボールを介してねじ込まれ、
かつ回転盤１６には歯車１７が取着してあつて、
その歯車１７と共に上記回転盤１６が回転したと
き、ねじリードによつてねじ軸１５が可動盤１３
と一緒に移動するようになつている。[Example] In the figure, 1 indicates a mold clamping device, and 2 indicates an injection device. The mold clamping device 1 includes a tie bar 12 installed on a pair of fixed plates 10 and 11 on a machine stand 3, and a movable plate 13 movably attached to the tie bar 12. Molds 14, 14 are provided on opposing surfaces of the fixed plate 11 and the movable plate 13, respectively, and the movable plate 1
A screw shaft 15 is provided protruding from the opposite surface of 3. This screw shaft 15 is screwed into a rotary disk 16 rotatably attached to the other fixed plate 10 via a ball.
In addition, a gear 17 is attached to the rotary disk 16,
When the rotary disk 16 rotates together with the gear 17, the screw shaft 15 is moved to the movable disk 13 by the screw lead.
They are starting to move together.

射出装置２は、スクリユ２０を内装した射出加
熱筒２１と、射出加熱筒２１の保持を兼ねる機台
上のハウジング２２とを有する。該ハウジング２
２の内部にはスクリユ２０の後端部と、そのスク
リユと平行して両側に架設した一対の支軸２４，
２４があり、この支軸２４，２４にスクリユ保持
部材２５が前後方向に摺動自在に取付けてある。 The injection device 2 includes an injection heating cylinder 21 containing a screw 20 therein, and a housing 22 on the machine base that also serves to hold the injection heating cylinder 21. The housing 2
Inside the screw 2, there is a rear end portion of the screw 20, and a pair of support shafts 24 installed on both sides in parallel with the screw.
24, and a screw holding member 25 is attached to these support shafts 24, 24 so as to be slidable in the front and rear directions.

またスクリユ２０の後端には、歯車２６を有す
る延長軸２７が連設してあり、かつ延長軸２７の
端部は上記スクリユ保持部材２５に回動自在に連
結してある。 Further, an extension shaft 27 having a gear 26 is connected to the rear end of the screw 20, and the end of the extension shaft 27 is rotatably connected to the screw holding member 25.

更にまたスクリユ保持部材２５の後部に設けた
ねじ受部材２８には、ハウジング壁部２２ａに回
転自在に保持され、かつ歯車２９を有する軸部３
０ａと一体のねじ軸３０がボールを介してねじ込
んであり、また軸部３０ａの外端は、ハウジング
壁部２２ａに固定したブレーキ装置３１と連結し
ている。このブレーキ装置３１は内部にヒステリ
シスブレーキを具備する。 Furthermore, a screw receiving member 28 provided at the rear of the screw holding member 25 has a shaft portion 3 rotatably held on the housing wall portion 22a and having a gear 29.
A screw shaft 30 integral with 0a is screwed through a ball, and the outer end of the shaft portion 30a is connected to a brake device 31 fixed to the housing wall portion 22a. This brake device 31 is equipped with a hysteresis brake inside.

このヒステリシスブレーキは、フイールドとロ
ータ及びカツプの３つの部分から構成され、励磁
コイルを内蔵するフイールドが通電により磁化さ
れ、ロータの内外両磁極間に磁場が発生したと
き、磁場におかれたカツプも磁化され、ロータと
カツプが磁気的に連結される構造のもので、通常
に市販されているものである。３２は上記型締装
置側の伝動軸、３３は射出装置側の伝動軸で、伝
動軸３２は第１図に示すように、上記固定盤１
０，１１の下部に回動自在に軸承され、かつ固定
盤１０に近接して上記歯車１７と噛合した伝動歯
車３５を有する。また伝動軸３２はスプラインを
有するジヨイント３６ａを介して伝動軸３６と接
続されており、伝動軸３６は伝動軸３３と電磁作
動のクラツチ機構３４を介して接離自在に連設し
てある。 This hysteresis brake consists of three parts: a field, a rotor, and a cup. When the field containing an excitation coil is magnetized by electricity and a magnetic field is generated between the rotor's inner and outer magnetic poles, the cup placed in the magnetic field also It is magnetized and has a structure in which the rotor and the cup are magnetically connected, and is commonly available on the market. 32 is a transmission shaft on the mold clamping device side, 33 is a transmission shaft on the injection device side, and the transmission shaft 32 is connected to the fixed platen 1 as shown in FIG.
It has a transmission gear 35 which is rotatably supported on the lower part of 0 and 11 and meshed with the gear 17 in the vicinity of the stationary platen 10. Further, the transmission shaft 32 is connected to a transmission shaft 36 via a joint 36a having a spline, and the transmission shaft 36 is connected to the transmission shaft 33 via an electromagnetically actuated clutch mechanism 34 so as to be able to move toward and away from the transmission shaft 33.

また伝動軸３３は上記ハウジング２２の下部内
に他の伝動軸３７と共に回転自在に軸承され、そ
の伝動軸３３，３７上に上記歯車２６及び２９と
それぞれ噛合する伝動歯車３８，３９と、該歯車
の回転及び停止を行う電磁作動の複数のクラツチ
機構４０，４１とが設けてあり、さらに伝動軸３
７にハウジング２２に固定してサーボモータ４２
を駆動ベルト４３を介して連絡させてある。 Further, the transmission shaft 33 is rotatably supported in the lower part of the housing 22 together with another transmission shaft 37, and on the transmission shafts 33 and 37 there are transmission gears 38 and 39 that mesh with the gears 26 and 29, respectively. A plurality of electromagnetically actuated clutch mechanisms 40 and 41 are provided for rotating and stopping the transmission shaft 3.
The servo motor 42 is fixed to the housing 22 at 7.
are communicated via a drive belt 43.

なお４４，４５は伝動軸３３，３７に設けた駆
動用の歯車、４６はノズルタツチ用のねじ軸、４
７はねじ軸４６のクラツチである。 Note that 44 and 45 are drive gears provided on the transmission shafts 33 and 37, 46 is a screw shaft for nozzle touch, and 4
7 is a clutch of the screw shaft 46.

第５図に示した例は、上記支軸２４，２４を回
転自在に架設すると共に、その中ほどをねじ軸２
４ａ，２４ａとなし、スクリユ保持部材２５の両
端部にねじ受部材２８，２８を設けて、上記ねじ
軸２４ａ，２４ａにそれぞれボールを介してねじ
込んだ場合であり、支軸２４，２４には更に上記
歯車２９と噛合する歯車２９ａ，２９ａを設け、
歯車２９の回転を歯車２９ａ，２９ａを介して支
軸２４，２４に伝達し、ねじリードによりスクリ
ユ保持部材２５をスクリユ２０と共に進退移動す
る構造よりなる。 In the example shown in FIG.
4a, 24a, screw receiving members 28, 28 are provided at both ends of the screw holding member 25, and screwed into the screw shafts 24a, 24a through balls, respectively. Provided with gears 29a, 29a that mesh with the gear 29,
The rotation of the gear 29 is transmitted to the support shafts 24, 24 through the gears 29a, 29a, and the screw holding member 25 is moved forward and backward together with the screw 20 by a screw lead.

次に射出成形行程について説明する。 Next, the injection molding process will be explained.

クラツチ機構３４により伝動軸３２，３３を接
続した状態にて、サーボモータ４２を正回転させ
る。この際、射出装置２側ではクラツチ機構４
０，４１の作動により伝動歯車３８，３９を自由
状態にして置く。 With the transmission shafts 32 and 33 connected by the clutch mechanism 34, the servo motor 42 is rotated in the forward direction. At this time, on the injection device 2 side, the clutch mechanism 4
0 and 41 leave the transmission gears 38 and 39 free.

伝動軸３２と伝動歯車３５及び歯車１７とによ
つて回転盤１６が回転し、ねじ軸１５が送り出さ
れる。この結果、可動盤１３が前進移動して金型
１４，１４が閉じ、更に強力型締が行われる。型
締圧が所定圧に達したならばブレーキ４８を作動
して伝動軸３２を固定し、さらにクラツチ機構３
４を作動して伝動軸３３との接続を断つ。 The rotary disk 16 is rotated by the transmission shaft 32, the transmission gear 35, and the gear 17, and the screw shaft 15 is sent out. As a result, the movable platen 13 moves forward to close the molds 14, 14, and further strong mold clamping is performed. When the mold clamping pressure reaches a predetermined pressure, the brake 48 is activated to fix the transmission shaft 32, and the clutch mechanism 3
4 to disconnect the transmission shaft 33.

また射出装置側では指令によつてクラツチ機構
４１が作動し、伝動歯車３９を伝動軸３３と共に
回転させる。これにより歯車２９と一緒にねじ軸
３０を回転させ、スクリユ保持部材２５をねじリ
ードにより前進させる。このスクリユ保持部材２
５には、スクリユ後端の延長軸２７が軸承してあ
るから、スクリユ２０も共に前進して射出を行
う。 Further, on the injection device side, the clutch mechanism 41 is operated in response to a command, and the transmission gear 39 is rotated together with the transmission shaft 33. As a result, the screw shaft 30 is rotated together with the gear 29, and the screw holding member 25 is advanced by the screw lead. This screw holding member 2
Since the extension shaft 27 at the rear end of the screw is supported on the screw 5, the screw 20 also moves forward together to perform injection.

射出が完了すると、指令によつてサーボモータ
４２が停止し、同時にクラツチ機構４１を作動し
て歯車３９と接続を断つ。次にクラツチ機構４０
が作動して伝動歯車３８を伝動軸３７と共に回転
するようにする。そして再びサーボモータ４２が
逆回転すると、スクリユ２０が回転し、材料が移
送される。材料の移送によつてスクリユ２０に発
生した後退力はスクリユ保持部材２５を介して、
ねじ軸３０にスクリユ前進時と逆方向の回転力を
発生させる。 When the injection is completed, the servo motor 42 is stopped in response to a command, and at the same time, the clutch mechanism 41 is actuated to disconnect the gear 39. Next, the clutch mechanism 40
operates to cause the transmission gear 38 to rotate together with the transmission shaft 37. Then, when the servo motor 42 rotates in the reverse direction again, the screw 20 rotates and the material is transferred. The retreating force generated in the screw 20 due to the transfer of the material is transmitted through the screw holding member 25,
A rotational force is generated in the screw shaft 30 in the opposite direction to that when the screw moves forward.

同時にブレーキ装置３１を作動させ、ねじ軸３
０にブレーキ力を与えることにより、いわゆるス
クリユ背圧を発生しながら材料の計量が行われ
る。 At the same time, the brake device 31 is activated, and the screw shaft 3
By applying a braking force to 0, material is measured while generating so-called screw back pressure.

計量が済むと型締機構側では、電磁ブレーキ４
８を解除するとともにクラツチ機構３４が作動
し、伝動軸３２を再び伝動軸３３に接続する。ま
たサーボモータ４２を逆回転することにより、ね
じ軸１５は逆回転して型開きが行われ、１サイク
ルの射出成形が完了する。 After weighing, the mold clamping mechanism turns on the electromagnetic brake 4.
8 is released, the clutch mechanism 34 is operated, and the transmission shaft 32 is connected to the transmission shaft 33 again. Further, by rotating the servo motor 42 in the reverse direction, the screw shaft 15 rotates in the reverse direction to open the mold, completing one cycle of injection molding.

［発明の効果］ この発明は上述のように、射出加熱筒内のスク
リユを後端の延長軸を介して回転自在に保持し、
かつスクリユとともに進退移動するスクリユ保持
部材と、そのスクリユ保持部材に設けられたねじ
受部材と螺合し、射出駆動源からの回転力を該ね
じ受部材とにより直線運動に変換してスクリユ保
持部材をスクリユと供に前進移動させる定位置の
ねじ軸とからなり、そのねじ軸とねじ受部材との
上記螺合をボールを介して行うとともに、上記射
出駆動源をサーボモータとしてインラインスクリ
ユ式電動射出装置を構成してなることから、従来
のプランジヤ式電動射出装置と異なつて、螺合部
分の回転抵抗が殆ど無くなり、ねじ軸がスムーズ
に回転する結果、伝動効率が非常によくなり、ス
クリユを回転させて背圧制御しながら材料樹脂の
可塑化を行う場合にもスクリユはスムーズに後退
するので、背圧制御が容易となる。[Effects of the Invention] As described above, the present invention rotatably holds the screw in the injection heating cylinder via the extension shaft at the rear end,
The screw holding member that moves forward and backward together with the screw is screwed together with a screw receiving member provided on the screw holding member, and the rotational force from the injection drive source is converted into linear motion by the screw receiving member. It consists of a screw shaft at a fixed position that moves the screw forward together with the screw, and the screw shaft and the screw receiving member are engaged with each other via a ball, and the injection drive source is an in-line screw type electric motor using a servo motor. Unlike conventional plunger-type electric injection devices, the injection device has almost no rotational resistance in the screwed part, and the screw shaft rotates smoothly, resulting in very high transmission efficiency and Even when plasticizing the material resin while rotating and controlling the back pressure, the screw retreats smoothly, making it easy to control the back pressure.

またサーボモータでは、起動、停止、急加減速
制御は勿論のこと、トルク制御、さらには低速か
ら定格速度までの広範囲な速度制御を高精度に応
答性よくできるので、成形精度の高い成形品を成
形することができるなどの特長を有する。 In addition, servo motors can perform not only start, stop, and sudden acceleration/deceleration control, but also torque control and a wide range of speed control from low speed to rated speed with high precision and responsiveness, allowing molded products with high molding accuracy to be achieved. It has features such as being able to be molded.

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

図面はこの発明に係わるインラインスクリユ式
電動射出装置の実施例を示すもので、第１図は射
出成形機の側面図、第２図は射出装置の横断平面
図、第３図はハウジング部分における縦断面図、
第４図はハウジング下部における横断平面図、第
５図は射出装置の他の実施例の横断平面図、第６
図は第５図のハウジング部分における縦断面図で
ある。 １……型締装置、２……射出装置、２０……ス
クリユ、２１……射出加熱筒、２４……支軸、２
５……スクリユ保持部材、２７……延長軸、２８
……ねじ受部材、２９……歯車、３０……ねじ
軸、４２……サーボモータ。 The drawings show an embodiment of the in-line screw type electric injection device according to the present invention, and FIG. 1 is a side view of the injection molding machine, FIG. 2 is a cross-sectional plan view of the injection device, and FIG. 3 is a view of the housing portion. longitudinal section,
FIG. 4 is a cross-sectional plan view of the lower part of the housing, FIG. 5 is a cross-sectional plan view of another embodiment of the injection device, and FIG.
The figure is a longitudinal sectional view of the housing portion of FIG. 5. DESCRIPTION OF SYMBOLS 1... Mold clamping device, 2... Injection device, 20... Screw, 21... Injection heating tube, 24... Support shaft, 2
5... Screw holding member, 27... Extension shaft, 28
...Screw receiving member, 29...Gear, 30...Screw shaft, 42...Servo motor.

Claims (1)

【特許請求の範囲】[Claims] １ 後端に延長軸を有する射出加熱筒内のスクリ
ユと、その延長軸を介してスクリユを回転自在に
保持し、かつスクリユとともに進退移動する保持
部材と、そのスクリユ保持部材に設けられたねじ
受部材と螺合し、射出駆動源からの回転力を該ね
じ受部材とにより直線運動に変換してスクリユ保
持部材をスクリユと供に前進移動させる定位置の
ねじ軸とからなり、そのねじ軸とねじ受部材との
上記螺合をボールを介して行うとともに、上記射
出駆動源をサーボモータとしてなることを特徴と
すインラインスクリユ式電動射出装置。1. A screw in the injection heating cylinder having an extension shaft at the rear end, a holding member that rotatably holds the screw through the extension shaft and moves forward and backward together with the screw, and a screw receiver provided on the screw holding member. It consists of a fixed-position screw shaft that is screwed together with the injection drive source and converts the rotational force from the injection drive source into linear motion with the screw receiving member to move the screw holding member forward together with the screw. An in-line screw type electric injection device characterized in that the above-mentioned screw engagement with the screw receiving member is performed via a ball, and the above-mentioned injection drive source is a servo motor.
JP8996089A 1989-04-10 1989-04-10 Motor-driven injection device Granted JPH0248912A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8996089A JPH0248912A (en) 1989-04-10 1989-04-10 Motor-driven injection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8996089A JPH0248912A (en) 1989-04-10 1989-04-10 Motor-driven injection device

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP6283582A Division JPS58179631A (en) 1981-10-08 1982-04-15 Controlling method and equipment of screw back pressure of injection apparatus

Publications (2)

Publication Number Publication Date
JPH0248912A JPH0248912A (en) 1990-02-19
JPH0253212B2 true JPH0253212B2 (en) 1990-11-16

Family

ID=13985257

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8996089A Granted JPH0248912A (en) 1989-04-10 1989-04-10 Motor-driven injection device

Country Status (1)

Country Link
JP (1) JPH0248912A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51134749A (en) * 1975-05-19 1976-11-22 Showa Purasuchitsuku Kk Method of controlling injection molding machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51134749A (en) * 1975-05-19 1976-11-22 Showa Purasuchitsuku Kk Method of controlling injection molding machine

Also Published As

Publication number Publication date
JPH0248912A (en) 1990-02-19

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