JPH11123742A - Molding machine - Google Patents

Molding machine

Info

Publication number
JPH11123742A
JPH11123742A JP33074497A JP33074497A JPH11123742A JP H11123742 A JPH11123742 A JP H11123742A JP 33074497 A JP33074497 A JP 33074497A JP 33074497 A JP33074497 A JP 33074497A JP H11123742 A JPH11123742 A JP H11123742A
Authority
JP
Japan
Prior art keywords
screw shaft
ball nut
driven
ball screw
molding machine
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
JP33074497A
Other languages
Japanese (ja)
Other versions
JP4099732B2 (en
Inventor
Mitsuzo Miki
光造 三木
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.)
Toyo Machinery and Metal Co Ltd
Original Assignee
Toyo Machinery and Metal 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 Toyo Machinery and Metal Co Ltd filed Critical Toyo Machinery and Metal Co Ltd
Priority to JP33074497A priority Critical patent/JP4099732B2/en
Publication of JPH11123742A publication Critical patent/JPH11123742A/en
Application granted granted Critical
Publication of JP4099732B2 publication Critical patent/JP4099732B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/4005—Ejector constructions; Ejector operating mechanisms
    • 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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/4005—Ejector constructions; Ejector operating mechanisms
    • B29C2045/4036—Ejector constructions; Ejector operating mechanisms driven by a screw and nut mechanism

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)

Abstract

PROBLEM TO BE SOLVED: To provide a molding machine in which both replacement workability of a pulley to be driven and high-speed responsibility of a ball screw shaft are secured. SOLUTION: A recirculating ball body 3 having a flange part 4 in one end is freely rotatably supported on a movable plate 1 by a plurality of bearings 5. A pully 7 to be driven is fitted on the reverse recirculating ball body side of the flange part 4 by a fitting bolt 9 so that a ball screw shaft 8 is inserted. The recirculating screw shaft 8 is screwed to the recirculating ball body 3 and one end is fitted to an eject operating plate 10 by a fixed nut 11. Replacement work of the pulley 7 to be driven is performed by detaching the fitting bolt 9 and pulling out the pulley 7 to be driven from the ball screw shaft 8. Work for together detaching the recirculating ball body 3 and the bearings 5 or the like is unnecessary. The outer diameter dimension of the flange part 4 is set at the minimum diameter in a permeable range on structure in relation to the adjacent bearings 5 and made smaller than the outer diameter dimension of the bearings 5. Thereby, GD<2> of the flange part 4 is made small.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、ボールナツト体の
回転によりボールねじ軸を軸方向に移動し、被駆動部材
を直線往復動させる往復駆動機構を備えた成形機に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding machine provided with a reciprocating drive mechanism for moving a ball screw shaft in an axial direction by rotation of a ball nut to linearly reciprocate a driven member.

【０００２】[0002]

【従来の技術】射出成形機、ダイカストマシン、プラス
チツク成形機等の成形機において、被駆動部材を直線往
復動させるために、ボールナツト体とボールねじ軸とか
らなり、電動モータでボールナツト体を回転し、この回
転によりボールねじ軸を軸方向に移動し、ボールねじ軸
により被駆動部材を直線往復動させるようになつた往復
駆動機構が一般に採用されている。2. Description of the Related Art In a molding machine such as an injection molding machine, a die casting machine, a plastic molding machine or the like, a ball nut body and a ball screw shaft are used in order to linearly reciprocate a driven member, and the ball nut body is rotated by an electric motor. In general, a reciprocating drive mechanism that moves the ball screw shaft in the axial direction by this rotation and causes the driven member to reciprocate linearly with the ball screw shaft is generally employed.

【０００３】ところで、前記往復駆動機構については、
ボールナツト体を電動モータに駆動連結するために、ボ
ールナット体にフランジ部を設け、このフランジ部にプ
ーリ、歯車等からなる被駆動輪を取付けたものが知られ
ている。例えば、図３は射出成形機におけるエジエクト
機構の説明図で、３１は金型（図示せず）を支持する可
動盤、３２は可動盤３１に回転自在に設けられたボール
ナツト体である。３３はボールナツト体のフランジ部３
４と可動盤３１間に配置され、フランジ部３４のボール
ナツト体側に取付けられ被駆動プーリである。３５はボ
ールナツト体３２に螺合されたボールねじ軸、３６は可
動盤３１にガイドロツド（図示せず）で案内支持された
エジエクト作動板で、ボールねじ軸３５の一端が取付け
られている。３７〜３９は成形品を金型（図示せず）か
ら突き出す第１〜３のエジエクトピンである。４０は軸
受押圧板、４１は被駆動プーリ３３の取付ボルトであ
る。By the way, regarding the reciprocating drive mechanism,
2. Description of the Related Art In order to drive-connect a ball nut to an electric motor, a ball nut is provided with a flange, and a driven wheel including a pulley, a gear, and the like is attached to the flange. For example, FIG. 3 is an explanatory view of an eject mechanism in an injection molding machine. Reference numeral 31 denotes a movable plate supporting a mold (not shown), and 32 denotes a ball nut body rotatably provided on the movable plate 31. 33 is a flange portion of the ball nut body 3
4 is a driven pulley which is arranged between the movable platen 4 and the movable platen 31 and is attached to the ball nut side of the flange portion 34. Reference numeral 35 denotes a ball screw shaft screwed to the ball nut body 32, and reference numeral 36 denotes an eject operation plate which is guided and supported on the movable platen 31 by guide rods (not shown), and one end of the ball screw shaft 35 is attached thereto. Reference numerals 37 to 39 denote first to third eject pins for projecting a molded product from a mold (not shown). Reference numeral 40 denotes a bearing pressing plate, and 41 denotes a mounting bolt for the driven pulley 33.

【０００４】図３に示すエジエクト機構は、前記のよう
に構成されており、電動モータ（図示せず）の駆動によ
り駆動プーリ（図示せず）、被駆動プーリ３３を介して
ボールナツト体３２を回転し、ボールねじ軸３５を軸方
向に移動し、エジエクト作動板３６と一体に各エジエク
トピン３７〜３９を直線往復動させることになる。The eject mechanism shown in FIG. 3 is constructed as described above, and rotates a ball nut body 32 via a driving pulley (not shown) and a driven pulley 33 by driving an electric motor (not shown). Then, the ball screw shaft 35 is moved in the axial direction, and the eject pins 37 to 39 are linearly reciprocated integrally with the eject operation plate 36.

【０００５】[0005]

【発明が解決しようとする課題】ところが、前記従来の
往復駆動機構については、次の問題点がある。 被駆動輪がボールナツト体のフランジ部と可動盤と
の間に取付けられているため、被駆動輪を交換する際に
はボールナツト体、軸受押圧板、軸受等も一緒に取り外
さねばならない。そのため、被駆動輪の交換作業が繁雑
になつている。 ボールナツト体のフランジ部の外径寸法は、ボール
ナツト体の軸受の外径寸法と被駆動輪の取付ボルトの寸
法により設定される。また、被駆動輪の外径寸法は、フ
ランジ部の外径寸法により設定される。そして、被駆動
輪の取付構造上、取付ボルトの取付位置をボールナツト
体の外径よりも内側にすることができない。その結果、
フランジ部の外径寸法が軸受の外径寸法よりもはるかに
大きく、また被駆動輪の外径寸法も大きくなる。従つ
て、ボールナツト体、被駆動輪等の回転部材の慣性モー
メント（以下、ＧＤ２という）が大きくなり、ボールナ
ツト体の加減速時間が長く、ボールねじ軸を迅速に動作
させること、すなわちボールねじ軸の高速応答性を確保
することが困難である。 特に、ボールナツト体の回転数を高め、ボールねじ
軸の軸方向の移動速度を高速化しようとする際には、被
駆動輪を小径化することができないため、駆動輪を大径
化せざるを得ない。その結果、駆動輪側のＧＤ２も大き
くなり、駆動輪からボールナツト体までの全回転部材か
らなる回転系のＧＤ２が大きくなる。また、ボールナツ
ト体の回転数が高くなるに伴いＧＤ２が増大する。従つ
て、ボールねじ軸の高速応答性を確保することが困難で
ある。However, the conventional reciprocating drive mechanism has the following problems. Since the driven wheel is mounted between the flange portion of the ball nut body and the movable platen, when replacing the driven wheel, the ball nut body, the bearing pressing plate, the bearing, and the like must be removed together. Therefore, the operation of replacing the driven wheel is complicated. The outer diameter of the flange portion of the ball nut is determined by the outer diameter of the bearing of the ball nut and the size of the mounting bolt of the driven wheel. The outer diameter of the driven wheel is set by the outer diameter of the flange portion. And, due to the mounting structure of the driven wheel, the mounting position of the mounting bolt cannot be located inside the outer diameter of the ball nut body. as a result,
The outer diameter of the flange portion is much larger than the outer diameter of the bearing, and the outer diameter of the driven wheel also becomes larger. Accordance connexion, Borunatsuto body, the moment of inertia of the rotating member, such as a driven wheel (hereinafter, GD 2 hereinafter) is increased, longer acceleration times Borunatsuto body, to operate quickly the ball screw shaft, i.e. the ball screw shaft It is difficult to ensure the high-speed response of the device. In particular, when trying to increase the rotational speed of the ball nut and increase the axial movement speed of the ball screw shaft, the diameter of the driven wheel cannot be reduced, so the diameter of the drive wheel must be increased. I can't get it. As a result, GD 2 also increases the drive wheel side, the rotating system GD 2 becomes large consisting of whole rotary member from the drive wheels to Borunatsuto body. Further, GD 2 increases with the rotation speed of the Borunatsuto body increases. Therefore, it is difficult to ensure high-speed response of the ball screw shaft.

【０００６】本発明は、前記従来の状況に鑑みてなされ
たもので、その課題は、被駆動輪の交換作業を簡便に行
い得るとともに、ボールねじ軸の高速応答性を確保し得
る往復駆動機構を備えた成形機を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and has as its object a reciprocating drive mechanism capable of easily performing a replacement operation of a driven wheel and ensuring a high-speed response of a ball screw shaft. A molding machine provided with the above.

【０００７】[0007]

【課題を解決するための手段】前記課題を解決するため
に、本発明では、被駆動輪をフランジ部の反ボールナツ
ト体側に取付けている。これにより、被駆動輪をボール
ナツト体と一緒に取り外す必要がなく、被駆動輪のみを
取り外すことができる。また、被駆動輪の取付ボルトの
取付位置をボールナツト体の外径よりも内側にすること
ができ、フランジ部の外径寸法を取付ボルトの取付位置
により規制されることなく設定し得る。すなわち、フラ
ンジ部の外径寸法をボールナツト体の軸受の外径寸法と
の関係により設定すればよく、被駆動輪の取付ボルトの
寸法分を考慮する必要がない。そして、フランジ部の外
径寸法が小さくなることにより、被駆動輪の外径寸法も
小さくし得る。被駆動輪の外径寸法が小さくなることか
ら、駆動輪の外径寸法も小さくし得る。従つて、駆動輪
からボールナツト体までの回転部材のＧＤ２が小さくな
り、ボールねじ軸の高速応答性を確保し得る。In order to solve the above-mentioned problems, in the present invention, a driven wheel is mounted on the flange portion on the side opposite to the ball nut body. Thus, it is not necessary to remove the driven wheel together with the ball nut body, and only the driven wheel can be removed. Further, the mounting position of the mounting bolt of the driven wheel can be set inside the outer diameter of the ball nut, and the outer diameter of the flange portion can be set without being restricted by the mounting position of the mounting bolt. That is, the outer diameter of the flange portion may be set according to the relationship with the outer diameter of the bearing of the ball nut body, and there is no need to consider the dimensions of the mounting bolts of the driven wheel. Then, the outer diameter of the driven wheel can be reduced by reducing the outer diameter of the flange portion. Since the outer diameter of the driven wheel is reduced, the outer diameter of the driven wheel can also be reduced. Accordance connexion, GD 2 of the rotary member to Borunatsuto body is reduced from the drive wheels, it can ensure high-speed response of the ball screw shaft.

【０００８】[0008]

【発明の実施の形態】本発明の実施形態を図に基づいて
説明する。図１は本発明の実施形態の概念的な説明図
で、本発明の往復駆動機構を適用した射出成形機のエジ
エクト機構を一部切断して示す正面図、図２は同じくエ
ジエクト機構の要部拡大断面図である。図１及び図２に
おいて、１は金型（図示せず）を支持する可動盤で、マ
シンベース（図示せず）上に前後動可能に設けられ、リ
ンク機構からなる型開閉機構２に駆動連結されている。
３は一端にフランジ部４を有するボールナツト体で、複
数の軸受５により可動盤１に回転自在に支持されてい
る。６は軸受押圧板で、可動盤１に取付けられており、
軸受５を押さえてボールナツト体３を可動盤１に保持し
ている。７は被駆動プーリで、後述するボールねじ軸８
に挿通し、フランジ部４の反ボールナツト体側に取付ボ
ルト９により取付けられている。被駆動プーリ７には、
図示されていないが、電動サーボモータの駆動プーリが
タイミングベルトで駆動連結されている。ボールねじ軸
８は、ボールナツト体３に螺合され、一端がエジエクト
作動板１０に固定ナツト１１で取付けられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a conceptual explanatory view of an embodiment of the present invention. FIG. 1 is a partially cutaway front view showing an eject mechanism of an injection molding machine to which a reciprocating drive mechanism of the present invention is applied. FIG. It is an expanded sectional view. 1 and 2, reference numeral 1 denotes a movable plate that supports a mold (not shown), is provided on a machine base (not shown) so as to be movable back and forth, and is drivingly connected to a mold opening / closing mechanism 2 including a link mechanism. Have been.
Reference numeral 3 denotes a ball nut having a flange portion 4 at one end, and is rotatably supported on the movable platen 1 by a plurality of bearings 5. Reference numeral 6 denotes a bearing pressing plate, which is attached to the movable platen 1,
The ball nut 3 is held on the movable platen 1 by holding the bearing 5. Reference numeral 7 denotes a driven pulley, which is a ball screw shaft 8 described later.
And is attached to the flange 4 on the side opposite to the ball nut body by a mounting bolt 9. In the driven pulley 7,
Although not shown, a drive pulley of the electric servomotor is drivingly connected by a timing belt. The ball screw shaft 8 is screwed to the ball nut body 3, and one end is attached to the eject operation plate 10 by a fixed nut 11.

【０００９】エジエクト作動板１０は、可動盤１にガイ
ドロツド（図示せず）で案内支持されており、ボールね
じ軸８の軸方向移動により往復動するようになつてい
る。１２は成形品を金型（図示せず）から突き出す第１
エジエクトピンで、先端が可動盤１に形成された第１ピ
ン穴１３から出没自在に挿通され、後端がエジエクト作
動板１０にねじ止めされている。１４は第２エジエクト
ピンで、先端が可動盤１に形成された第２ピン穴１５に
出没自在に挿通され、後端がエジエクト作動板１０にね
じ止めされている。１６は第３エジエクトピンで、先端
が可動盤１に形成された第３ピン穴１７に出没自在に挿
通され、後端がボールねじ軸８の先端に取付けられてい
る。The eject operation plate 10 is supported on the movable platen 1 by a guide rod (not shown), and reciprocates by the axial movement of the ball screw shaft 8. Reference numeral 12 denotes a first for projecting a molded product from a mold (not shown).
The end of the eject pin is inserted through a first pin hole 13 formed in the movable plate 1 so as to be able to protrude and retract, and the rear end is screwed to the eject operation plate 10. Reference numeral 14 denotes a second eject pin, the tip of which is inserted into a second pin hole 15 formed in the movable plate 1 so as to be able to protrude and retract freely, and the rear end of which is screwed to the eject operation plate 10. Reference numeral 16 denotes a third eject pin, the tip of which is inserted into a third pin hole 17 formed in the movable board 1 so as to be able to protrude and retract, and the rear end of which is attached to the tip of the ball screw shaft 8.

【００１０】エジエクト機構は、前記のように構成され
ており、電動サーボモータ（図示せず）の駆動により駆
動プーリ、タイミングベルト（共に図示せず）、被駆動
プーリ７を介してボールナツト体３を回転し、ボールね
じ軸８を軸方向に移動し、エジエクト作動板１０を往復
動させる。これにより、各エジエクトピン１２、１４、
１６がエジエクト作動板１０と一体に往復動し、図２に
実線で示す待機位置と二点鎖線で示す突き出し位置間を
移動することになる。The eject mechanism is constructed as described above, and drives the electric nut (not shown) to drive the ball nut 3 through a driving pulley, a timing belt (not shown), and a driven pulley 7 by driving an electric servomotor (not shown). By rotating, the ball screw shaft 8 is moved in the axial direction, and the eject operation plate 10 is reciprocated. Thereby, each eject pin 12, 14,
16 reciprocates integrally with the eject operation plate 10 and moves between a standby position shown by a solid line in FIG. 2 and a protruding position shown by a two-dot chain line.

【００１１】ところで、被駆動プーリ７を交換する際に
は、固定ナツト１１を外してボールねじ軸８とエジエク
ト作動板１０とを分離し、取付ボルト９を外して被駆動
プーリ７をボールねじ軸８から抜き取る。そして、交換
品の被駆動プーリ７をボールねじ軸８に挿通し、取付ボ
ルト９でボールナツト体のフランジ部４に取付け、ボー
ルねじ軸８とエジエクト作動板１０とを固定ナツト１１
で締め付けて取付ける。以上のように、ボールナツト体
３まわりの部材を一緒に脱着させないで被駆動プーリ７
の交換作業を行い得るため、図１に示すように型開閉機
構２のリンク機構等がある狭い空間部にも拘わらず無理
なく交換作業を行うことができる。When the driven pulley 7 is replaced, the fixed nut 11 is removed to separate the ball screw shaft 8 from the eject operation plate 10, and the mounting bolt 9 is removed to remove the driven pulley 7 from the ball screw shaft. Remove from 8. Then, the driven pulley 7 to be replaced is inserted into the ball screw shaft 8 and attached to the flange portion 4 of the ball nut body with the mounting bolt 9, and the ball screw shaft 8 and the eject operation plate 10 are fixed to the fixed nut 11.
Tighten with. As described above, the members around the ball nut 3 are not detached together and the driven pulley 7
Therefore, the replacement work can be performed without difficulty irrespective of the narrow space where the link mechanism of the mold opening / closing mechanism 2 is located as shown in FIG.

【００１２】ボールナツト体のフランジ部４の外径寸法
は、隣接する軸受５との関係において構造上許容される
範囲で最小径に設定されており、軸受５の外径寸法より
も小さくなつている。これにより、フランジ部４のＧＤ
２が従来よりも小さくなつている。被駆動プーリの取付
ボルト９の取付位置がボールナツト体３の外径よりも内
側になつており、取付ボルト９のＧＤ２が小さくなつて
いる。また、被駆動プーリ７については、減速比に応じ
て外径寸法が設定されるが、フランジ部４の外径寸法が
小さいことから、従来と同一減速比の場合でも小径のも
のを採用し得る。その際、駆動プーリ（図示せず）につ
いても、同様に従来よりも小径のものを採用し得る。ま
た、減速比を小さくし、被駆動プーリ７いいかえればボ
ールナツト体３の回転数を高くする場合には、フランジ
部４に取付け得る範囲において小径の被駆動プーリ７を
採用し得る。これにより、被駆動プーリ７のＧＤ２も小
さくなり、ひいてはボールナツト体３を含むボールナツ
ト体３まわりの回転部材のＧＤ２も小さくなる。また、
駆動プーリ（図示せず）のＧＤ２も小さくなる。The outer diameter of the flange portion 4 of the ball nut is set to a minimum diameter within a structurally allowable range in relation to the adjacent bearing 5, and is smaller than the outer diameter of the bearing 5. . Thereby, the GD of the flange portion 4
2 is smaller than before. Mounting position of the mounting bolt 9 of the driven pulley has summer inward than the outer diameter of the Borunatsuto body 3, GD 2 mounting bolts 9 are summer small. The driven pulley 7 has its outer diameter set in accordance with the reduction ratio. However, since the outer diameter of the flange portion 4 is small, a smaller diameter can be adopted even in the case of the same reduction ratio as the conventional one. . At that time, a drive pulley (not shown) having a smaller diameter than the conventional one can also be employed. Further, when the reduction ratio is reduced and the driven pulley 7, in other words, the rotation speed of the ball nut 3 is increased, the driven pulley 7 having a small diameter can be adopted as long as it can be attached to the flange portion 4. Accordingly, the GD 2 of the driven pulley 7 is also reduced, and the GD 2 of the rotating member around the ball nut body 3 including the ball nut body 3 is also reduced. Also,
GD 2 also decreases the driving pulley (not shown).

【００１３】以上のように、本実施形態によれば、駆動
プーリ（図示せず）からボールナツト体３までの全回転
部材のＧＤ２を小さくすることができることから、ボー
ルねじ軸８を高速で移動させることができ、高速応答性
に優れたエジエクト機構とし得る。なお、本実施形態
は、本発明の往復駆動機構を射出成形機のエジエクト機
構に適用したものであるが、射出成形機の射出駆動機
構、ノズルタツチ機構等に適用し得ることはもち論、ダ
イカストマシン、プラスチツク成形機についても適用し
得る。As described above, according to this embodiment, the GD 2 of all the rotating members from the driving pulley (not shown) to the ball nut 3 can be reduced, so that the ball screw shaft 8 moves at high speed. And an eject mechanism having excellent high-speed response can be obtained. In the present embodiment, the reciprocating drive mechanism of the present invention is applied to an eject mechanism of an injection molding machine. However, it can be applied to an injection drive mechanism of an injection molding machine, a nozzle touch mechanism, and the like. It is also applicable to plastic molding machines.

【００１４】[0014]

【発明の効果】本発明によれば、被駆動輪がフランジ部
の反ボールナツト体側に取付けられていることから、被
駆動輪の交換作業については被駆動輪の取り外しと取付
け及びボールねじ軸と被駆動部材との分離・結合を行え
ばよく、ボールナツト体まわりの部材の脱着作業を行な
う必要がない。従つて、被駆動輪の交換作業を従来より
もはるかに簡単かつ迅速に行い得る。これにより、成形
機の運転条件の変更に容易に対応することができ、作動
効率の高い成形機を得ることが可能になつた。According to the present invention, since the driven wheel is mounted on the side of the flange portion opposite to the ball nut body, for the replacement of the driven wheel, the removal and installation of the driven wheel and the ball screw shaft and What is necessary is just to separate and couple with a drive member, and it is not necessary to perform attachment / detachment work of the member around a ball nut body. Therefore, the replacement operation of the driven wheels can be performed much easier and faster than before. As a result, it is possible to easily cope with a change in the operating conditions of the molding machine, and it is possible to obtain a molding machine with high operation efficiency.

【００１５】ボールナツト体のフランジ部の外径寸法が
取付ボルトの取付位置により規制されないため、従来よ
りもはるかに小さくし得る。これにより、被駆動輪の外
径寸法及び取付ボルトの取付位置の半径を小さくし得
る。従つて、ボールナツト体を含むボールナツト体まわ
りの回転部材のＧＤ２が小さくなる。また、駆動輪の外
径寸法も小さくし得ることから、駆動輪からボールナツ
ト体までの回転部材のＧＤ２が小さくなり、ボールナツ
ト体の回転数を高めてもボールねじ軸の高速応答性を確
保し得る。その結果、成形機のサイクルタイムを短縮化
し、作動効率の高い成形機を得ることが可能になつた。Since the outer diameter of the flange portion of the ball nut is not restricted by the mounting position of the mounting bolt, it can be made much smaller than before. Thereby, the outer diameter of the driven wheel and the radius of the mounting position of the mounting bolt can be reduced. Accordance connexion, the GD 2 of the rotating member around Borunatsuto comprising a Borunatsuto body decreases. The outer diameter of the drive wheel since it may also be smaller, the smaller the GD 2 of the rotary member to Borunatsuto member from the drive wheels, even by increasing the rotational speed of the Borunatsuto body to ensure high-speed response of the ball screw shaft obtain. As a result, it has become possible to shorten the cycle time of the molding machine and obtain a molding machine with high operation efficiency.

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

【図１】本発明の実施形態の概念的な説明図で、射出成
形機のエジエクト機構を一部切断して示す正面図であ
る。FIG. 1 is a conceptual explanatory view of an embodiment of the present invention, and is a front view partially showing an eject mechanism of an injection molding machine.

【図２】図１に示す射出成形機のエジエクト機構の要部
の拡大断面図で、図面の上方部分がエジエクトピンが待
機位置にある状態を示し、下方郎分がエジエクトピンが
突出位置にある状態を示している。FIG. 2 is an enlarged sectional view of a main part of an eject mechanism of the injection molding machine shown in FIG. 1, wherein an upper part of the drawing shows a state in which an eject pin is at a standby position, and a lower part shows a state in which the eject pin is at a projecting position. Is shown.

【図３】従来技術の概念的な説明図で、射出成形機にお
けるエジエクト機構の作動状態を図２と同様に示してい
る。FIG. 3 is a conceptual explanatory view of a conventional technique, and shows an operation state of an eject mechanism in an injection molding machine, similarly to FIG. 2;

【符号の説明】[Explanation of symbols]

１ 可動盤 ３ ボールナツト
体 ４ ボールナツト体のフランジ部 ５ 軸受 ７ 被駆動プーリ ８ ボールねじ軸 ９ 被駆動プーリの取付ボルト １０ エジエクト
作動板 １２ 第１エジエクトピン １４ 第２エジエ
クトピン １６ 第２エジエクトピンDESCRIPTION OF SYMBOLS 1 Movable board 3 Ball nut body 4 Flange part of ball nut body 5 Bearing 7 Driven pulley 8 Ball screw shaft 9 Mounting bolt of driven pulley 10 Eject operation plate 12 1st eject pin 14 2nd eject pin 16 2nd eject pin

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 フランジ部を有し、回転自在に設けられ
たボールナツト体と、ボールナツト体のフランジ部に取
付けられ、電動モータに駆動連結された被駆動輪と、ボ
ールナツト体に螺合され、軸方向に移動可能に設けられ
たボールねじ軸とからなり、ボールナツト体の回転によ
りボールねじ軸を軸方向に移動し、この移動により被駆
動部材を直線往復動させる往復駆動機構を備えた成形機
であつて、被駆動輪がフランジ部の反ボールナツト体側
に取付けられていることを特徴とする成形機。A ball nut having a flange and rotatably provided; a driven wheel mounted on the flange of the ball nut and drivingly connected to an electric motor; screwed to the ball nut; A molding machine having a reciprocating drive mechanism comprising a ball screw shaft movably provided in the direction, the ball screw shaft being moved in the axial direction by the rotation of the ball nut, and the driven member being linearly reciprocated by this movement. A molding machine, wherein a driven wheel is mounted on a side of a flange portion opposite to a ball nut body. 【請求項２】 ボールナツト体が金型を取付ける可動盤
に軸受を介して回転自在に取付けられ、被駆動部材がエ
ジエクトピンを有するエジエクト作動板で、このエジエ
クト作動板にボールねじ軸の一端が取付けられている請
求項１記載の成形機。2. A ball nut unit is rotatably mounted on a movable plate on which a mold is mounted via a bearing, and a driven member is an eject operation plate having an eject pin. One end of a ball screw shaft is attached to the eject operation plate. The molding machine according to claim 1, wherein
JP33074497A 1997-10-23 1997-10-23 Injection molding machine Expired - Fee Related JP4099732B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33074497A JP4099732B2 (en) 1997-10-23 1997-10-23 Injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33074497A JP4099732B2 (en) 1997-10-23 1997-10-23 Injection molding machine

Publications (2)

Publication Number Publication Date
JPH11123742A true JPH11123742A (en) 1999-05-11
JP4099732B2 JP4099732B2 (en) 2008-06-11

Family

ID=18236077

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33074497A Expired - Fee Related JP4099732B2 (en) 1997-10-23 1997-10-23 Injection molding machine

Country Status (1)

Country Link
JP (1) JP4099732B2 (en)

Also Published As

Publication number Publication date
JP4099732B2 (en) 2008-06-11

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