JPS5841366Y2 - pressure control device - Google Patents

pressure control device

Info

Publication number
JPS5841366Y2
JPS5841366Y2 JP1977140595U JP14059577U JPS5841366Y2 JP S5841366 Y2 JPS5841366 Y2 JP S5841366Y2 JP 1977140595 U JP1977140595 U JP 1977140595U JP 14059577 U JP14059577 U JP 14059577U JP S5841366 Y2 JPS5841366 Y2 JP S5841366Y2
Authority
JP
Japan
Prior art keywords
chamber
pressure
passage
control valve
valve stem
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
JP1977140595U
Other languages
Japanese (ja)
Other versions
JPS5372086U (en
Inventor
アルミン・ブルマー
Original Assignee
マシイネンフアブリツク・ウント・ギ−ゼライ・ネツトスタ−ル・アクチエンゲゼルシヤフト
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 マシイネンフアブリツク・ウント・ギ−ゼライ・ネツトスタ−ル・アクチエンゲゼルシヤフト filed Critical マシイネンフアブリツク・ウント・ギ−ゼライ・ネツトスタ−ル・アクチエンゲゼルシヤフト
Publication of JPS5372086U publication Critical patent/JPS5372086U/ja
Application granted granted Critical
Publication of JPS5841366Y2 publication Critical patent/JPS5841366Y2/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • 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
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/82—Hydraulic or pneumatic circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/426—Flow control characterised by the type of actuation electrically or electronically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/575—Pilot pressure control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
    • F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86582—Pilot-actuated
    • Y10T137/86614—Electric

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Description

【考案の詳細な説明】 この考案は圧力使用部へかかる圧力を制御するための圧
力制御装置、更に詳しくは、圧力使用部と圧力を供給す
るとともにその圧力の供給を停止し、かつ使用部からの
帰り圧力溜めに帰還させる全ての必要な機能を遂行する
制御バルブに必要な全ての調整機材及び逆転機材が作用
するようにし７た新規な圧力制御装置に関するものであ
る。[Detailed description of the invention] This invention is a pressure control device for controlling the pressure applied to the pressure-using part, more specifically, it supplies pressure to the pressure-using part and stops the supply of pressure, and The present invention relates to a novel pressure control system in which all the necessary regulating and reversing equipment act on a control valve that performs all the necessary functions of returning pressure to the return pressure reservoir.

一般に、圧力で作動されるピストンユニット、特にプラ
スチック射出成型機の溶融ユニットおよび射出スクリュ
ーユニットの制御はユニットの異なる機能に対応して異
なる制御装置、例えば圧力調整バルブ、流量調整バルブ
等が必要とされる。In general, the control of pressure-operated piston units, especially the melting unit and injection screw unit of plastic injection molding machines, requires different control devices, such as pressure regulating valves, flow regulating valves, etc., corresponding to different functions of the unit. Ru.

これらの異った制御装置は通常別々に設けられているか
、あるいは集められて一つのブロックを形成している。These different control devices are usually provided separately or are grouped together to form a block.

従来から機械の中にこれらの制御機材を別々に取り付け
るには費用がかかるとともに時間を要する。Traditionally, installing these control devices separately within a machine is expensive and time consuming.

更に、個々の制御機材中で圧力を制御する圧力媒体は逆
転されたり絞られたりする。Furthermore, the pressure medium controlling the pressure in the individual control devices can be reversed or throttled.

その結果生じる圧力損失は始動圧力を比較的高くするこ
とにより補なわなければならない。The resulting pressure loss must be compensated by a relatively high starting pressure.

この考案の目的は、圧力制御装置として、圧力作動ピス
トンユニットを制御するため全て必要な調整及び逆転機
材が一つの制御パルプに作用するようにした制御装置を
新規に提供することである。The object of this invention is to provide a new pressure control device in which all the necessary adjustment and reversal equipment for controlling a pressure-actuated piston unit act on one control pulp.

更に、この考案の目的は一つの制御パルプが必要な全て
の機能を果すようにし、それにより、取付費用及び圧力
発生源と圧力使用部との間に生ずる移送損失を減少する
ようにした圧力制御装置を新規に提供することである。Furthermore, the object of this invention is to provide a pressure control system in which one control pulp performs all the necessary functions, thereby reducing installation costs and transfer losses occurring between the pressure source and the pressure-using part. The goal is to provide new equipment.

したがって、この考案は圧力制御装置として、円筒状ガ
イド部を構成する孔を穿設したハウジング内に絞孔に連
通させて複数個の通路を設け、該通路をそれぞれ圧力媒
圧源、圧力使用部及び帰り圧力溜めへ連通すると共に、
該孔内に摺動自在に主制御弁棒を挿通し、該弁棒を軸方
向に働く圧力で作動すると共に上記通路間の連通を制御
するため少くとも一段階で弁棒の移動方向を変える作動
手段を設け、かつ上記・・ウジングの軸方向に適宜の間
隔をあけて設けた上記通路のうち、一端部に位置する第
一通路を圧力媒体源に連通し、中間に位置する第二通路
を圧力使用部に連通し、他端部に位置する第三通路を帰
り圧力媒体溜めに連通し、かつ、孔内周面に軸方向に適
宜の間隔をあけて円環状の凹部を設けて上記第一通路、
第二通路、第三通路にそれぞれ連通する第−室、第二室
、第三室を形成し、さらに主制御弁棒の軸方向の中間に
突出部を設け、弁棒の移動により該突出部で第一通路と
第二通路、第二通路と第三通路の連通部を解放、閉鎖し
連通を制御するようにし、さらに上記孔に連通ずるよう
にハウジング上に逆転バルブ及び少くとも一つの先行圧
力制御バルブを設け、逆転バルブにより主制御弁棒を移
動させる一方、上記先行圧力制御バルブにより各通路間
を連通ずる連通部の流通断面積を適宜の大きさとするた
め主制御弁棒を更に変位させるようにし、かつ上記・・
ウジング内の一室に主制御弁棒と連動する補助ピストン
を摺動自在に設けるとともに該室内に同軸方向に伸びる
調整用フィーラを設けて補助ピストンと当接させ、該フ
ィーラにより補助ピストン及び主制御弁棒の軸方向の一
端への動きを制限し、上記第二連通部の最小流通断面積
を決定するようにしたことを特徴とする射出成型機の溶
融ユニット及び射出スクリュー等で用いる圧力作動ピス
トンユニットを制御するようにしたものである。Therefore, in this invention, as a pressure control device, a plurality of passages are provided in a housing in which a hole constituting a cylindrical guide part is bored and communicated with a throttle hole. and communicates with the return pressure reservoir,
A master control valve stem is slidably inserted into the hole, the valve stem is actuated by an axial pressure, and the direction of movement of the valve stem is changed in at least one step to control communication between the passages. Among the passages provided with actuating means and provided at appropriate intervals in the axial direction of the housing, a first passage located at one end communicates with the pressure medium source, and a second passage located in the middle. communicates with the pressure use part, and the third passage located at the other end communicates with the return pressure medium reservoir, and annular recesses are provided at appropriate intervals in the axial direction on the inner peripheral surface of the hole. first aisle,
A second chamber, a second chamber, and a third chamber are formed which communicate with the second passage and the third passage, respectively, and a protrusion is provided in the axial middle of the main control valve stem, and when the valve stem moves, the protrusion to control the communication by opening and closing the communication portions between the first passage and the second passage, and between the second passage and the third passage, and further a reversing valve and at least one preceding valve are disposed on the housing so as to communicate with the holes. A pressure control valve is provided, and the main control valve stem is moved by a reversing valve, while the main control valve stem is further displaced by the preceding pressure control valve to make the flow cross-sectional area of the communication section between each passage to an appropriate size. and the above...
An auxiliary piston that interlocks with the main control valve stem is slidably provided in a chamber in the housing, and an adjustment feeler that extends coaxially within the chamber is brought into contact with the auxiliary piston, and the feeler controls the auxiliary piston and the main control valve. A pressure-operated piston for use in a melting unit, an injection screw, etc. of an injection molding machine, characterized in that the movement of the valve stem toward one end in the axial direction is restricted, and the minimum flow cross-sectional area of the second communication portion is determined. It is designed to control the unit.

更にこの考案は主制御バルブのハウジング上に逆転バル
ブおよび１又は１以上の先行圧力制御バルブを取り付け
てそれぞれ・・ウジング内の孔に連通し、そのうち、逆
転バルブを電磁的に作動させている。Further, the invention mounts a reversing valve and one or more pre-pressure control valves on the housing of the main control valve, each communicating with a hole in the housing, of which the reversing valve is actuated electromagnetically.

また、先行圧力制御バルブは複数個設けてそれぞれ制御
圧力に応じて調整してもよいが、−個設けて選択スイッ
チの制御により電磁的に調整するようにしてもよい。Further, although a plurality of advance pressure control valves may be provided and adjusted according to the control pressure, it is also possible to provide - two advance pressure control valves and adjust them electromagnetically by controlling a selection switch.

上記の如き構成よりなるこの考案に係る装置は、上記の
如き圧力源から消費系への圧力流むよび消費系から回収
系への圧力流によって消費系に対する圧力を制御するこ
とができ、また、圧力源から消費系への圧力流をも制御
することができ、したがって、単一のブロックよりなる
この考案の装置は、デジタル的に消費系から圧力源を遮
断すること、ノズルの制御等の補助作用を得ることがで
きるものである。The device according to the invention having the above-mentioned configuration can control the pressure on the consuming system by the pressure flow from the above-mentioned pressure source to the consuming system and from the consuming system to the recovery system, and It is also possible to control the pressure flow from the pressure source to the consumer system, so the device of this invention, consisting of a single block, can digitally isolate the pressure source from the consumer system, assist in controlling the nozzles, etc. It is something that can have an effect.

以下、この考案を図示した一実施例に基き詳細に説明す
る。Hereinafter, this invention will be explained in detail based on an illustrated embodiment.

第１図の概略的に示された制御装置にむいて、第一接続
点Ａはプラスチック射出成型機におけるプラスチック溶
融ユニット及び射出スクリューの水圧で作動されるピス
トン（図示せず）へ通ずる圧力伝導用配管１のために設
けており、第二接続点Ｔは帰り流体を受収するための貯
蔵タンク（図示せず）へ通ずる配管２のために設けて釦
り、第三接続点Ｐは圧力をけけた状態で水圧媒体源へ通
ずる配管３のために設けている。For the control device shown schematically in FIG. 1, the first connection point A is for pressure transmission to a hydraulically actuated piston (not shown) of a plastic melting unit and an injection screw in a plastic injection molding machine. A second connection point T is provided for pipe 2 leading to a storage tank (not shown) for receiving return fluid, and a third connection point P is provided for pressure release. It is provided for a pipe 3 leading to a source of hydraulic medium in a state in which

各配管１，２．３は接続点Ａ、Ｔ、Ｐｔ、−よび主制御
バルブ４に連結している。Each pipe 1, 2.3 is connected to a connection point A, T, Pt - and to a main control valve 4.

第１図において、スクリューむよび射出圧力の背圧を調
整するための二個の先行圧力制御バルブ５．６はそれぞ
れ主制御バルブ４に接続され、該バルブ４は電磁的に作
動される逆転バルブ７に接続されている。In FIG. 1, two pre-pressure control valves 5.6 for adjusting the back pressure of the screw and injection pressures are respectively connected to a main control valve 4, which is an electromagnetically actuated reversing valve. 7 is connected.

第３図に示した如く、主制御バルブ４は・・ウジフグ１
０内に軸方向に伸長した孔１１を有して釦り、該孔１１
内に大略円筒状のスライド弁棒１２を摺動自在に設けて
いる。As shown in Figure 3, the main control valve 4 is...
0, the button has a hole 11 extending in the axial direction, and the hole 11
A roughly cylindrical slide valve rod 12 is slidably provided therein.

弁棒１２は二個の円周方向へ穿設した溝１３ａ。The valve stem 12 has two grooves 13a bored in the circumferential direction.

１３ｂによって互に軸方向に区分された三個の制御用突
出部１４ａｔ１４ｂｔ１４ｃを有する。It has three control protrusions 14at14bt14c separated from each other in the axial direction by 13b.

これらの突出部は孔１１内に４個の室１６ａ、１６ｂ。These protrusions form four chambers 16a, 16b within the hole 11.

ｆ’６ｃ、１６ｅを形成する孔内部に円環状に突出した
４個のリブ１５ａｔ １５ｂ 、１５ｃ 、１５ｄの内
周面上を摺動するものである。It slides on the inner peripheral surfaces of four ribs 15at 15b, 15c, and 15d that protrude in an annular shape inside the holes forming f'6c and 16e.

逆転バルブ７はハウジング１０上に設けられ、孔１７ａ
ｔ１７ｂを介して室１６ｂｔ１６ａにそれぞれ連通する
孔１７ｃｔ１７ｄに連通する。The reversing valve 7 is provided on the housing 10 and has a hole 17a.
The holes 17ct17d communicate with the chambers 16bt16a through t17b.

先行圧力制御バルブ５，６は導管１８を介して室１６ａ
に連通ずる。The preliminary pressure control valves 5, 6 are connected to the chamber 16a via a conduit 18.
It will be communicated to.

配管１，２．３はそれぞれ室１６ｃ、１６ｂ、１６ｄに
連通されている。The pipes 1, 2.3 communicate with chambers 16c, 16b, and 16d, respectively.

弁棒１２の突出部１４ｂ内に穿設した貫通孔１９は室１
６ｅと弁棒１２内の軸方向の孔２０を連通して釦り、絞
孔２０は弁棒１２の軸方向の端部にある突出部１４ｃの
端部で開口している。A through hole 19 bored in the protrusion 14b of the valve stem 12 is connected to the chamber 1.
6e and an axial hole 20 in the valve stem 12 are connected to each other, and the throttle hole 20 opens at the end of the protrusion 14c at the axial end of the valve stem 12.

孔２０の径の大きな端部には室１６ｅ内を摺動する補助
ピストン２２のステムに一端を当接させたコイルスプリ
ング２１を内装している。A coil spring 21 whose one end is brought into contact with the stem of an auxiliary piston 22 that slides within the chamber 16e is housed in the large-diameter end of the hole 20.

室１６ｅは・・ウジフグ１０内のスライド弁棒１２と同
軸上に設けたツイーン２３の軸方向の孔２３ａと連通し
ている。The chamber 16e communicates with an axial hole 23a of a twine 23 provided coaxially with the slide valve rod 12 in the puffer fish 10.

室１６ｅの補助ピストン２２両側部分は横方向の孔２４
ａ１軸方向の孔２４ｂを介して互に連通している。Both sides of the auxiliary piston 22 in the chamber 16e are provided with horizontal holes 24.
They communicate with each other via holes 24b in the a1 axial direction.

室１６ｅの左右両側は第１図、第２図に示す如くそれぞ
れ配管２５．２６によって電磁逆転バルブ７に接続され
、バルブ７は配管２５を配管３に、配管２６を配管２へ
、または配管２５を配管２に、配管２６を配管３へ切換
えて接続する。The left and right sides of the chamber 16e are connected to the electromagnetic reversing valve 7 by pipes 25 and 26, respectively, as shown in FIGS. 1 and 2, and the valve 7 connects the pipe 25 to the pipe 3, the pipe 26 to the pipe 2, or Switch and connect pipe 26 to pipe 2 and pipe 26 to pipe 3.

ツイーン２３は機構的に調整でき、よって補助ピストン
２２の右側面が室１６ｅ内に伸長するフ・ｆ−ラ２３と
接合する時、ピストン２２の右方向への作動最小寸法が
決定される。The tween 23 is mechanically adjustable so that the minimum rightward movement of the piston 22 is determined when the right side of the auxiliary piston 22 mates with the flare 23 extending into the chamber 16e.

上記構造よりなる制御バルブの作動を以下に説明する。The operation of the control valve having the above structure will be explained below.

射出成型機の溶融段階の間、圧力源への接続点Ｐはねじ
ピストンの圧力側へ通ずる圧力使用部への接続点Ａから
切り離されてむり、一方、接続点Ａは接続点Ｔを介して
貯蔵タンクへ接続されている。During the melting phase of the injection molding machine, the connection point P to the pressure source is disconnected from the connection point A to the pressure-using part leading to the pressure side of the screw piston, while the connection point A is connected via the connection point T. Connected to storage tank.

この溶融段階中の各制御要素の位置は第１図に示されて
いる。The position of each control element during this melting stage is shown in FIG.

逆転バルブ７ばセットされており、そのため主制御弁棒
１２は第３図において鎖線で示された如く左側端部に位
置する。The reversing valve 7 is set, so that the main control valve stem 12 is located at the left end as shown by the chain line in FIG.

この状態にち・いて、突出部１４ｂは室１６ｂ＞よび配
管３を室１６ｃから遮断する一方、室１６ｃを環状溝１
３ｂを介して室１６ｄに連通し、その結果、圧力使用部
への配管１は貯蔵源への配管２に連通される。In this state, the protrusion 14b isolates the chamber 16b> and the pipe 3 from the chamber 16c, while the protrusion 14b isolates the chamber 16c from the annular groove 1.
3b to the chamber 16d, so that the line 1 to the pressure application is connected to the line 2 to the storage source.

溶融段階における配管１内釦よび後方に移動するねじの
水圧作動ピストンにかかる圧力はバルブ４内の室１６ｃ
と室１６ｄ間の通路の大きさ及びスライド弁棒１’２．
ｂよびその環状溝１３ｂの位置により定渣る。During the melting stage, the pressure exerted on the button in the pipe 1 and the hydraulically actuated piston of the screw moving backwards is in the chamber 16c in the valve 4.
and the size of the passage between the chamber 16d and the slide valve stem 1'2.
b and the position of the annular groove 13b.

スライド弁棒１２の位置は第１図、第２図むよび第３図
に示されているこの実施例に釦いては先行圧力制御バル
ブ５および６を調整することにより調整できる。The position of the slide valve stem 12 can be adjusted by adjusting the advance pressure control valves 5 and 6 in this embodiment of the button shown in FIGS. 1, 2 and 3.

すなわち、バルブ５を使用することにより、導管１８を
通して室１６ａ内の圧力、スライド弁棒１２の位置むよ
び溝１３ｂを介しての室１６ｃと１６ｂ間の通路の流通
断面積を調整することができる。That is, by using the valve 5, it is possible to adjust the pressure in the chamber 16a through the conduit 18, the position of the slide valve stem 12 and the flow cross-section of the passage between the chambers 16c and 16b via the groove 13b. .

さらに、もし必要ならば相当数の先行圧力制御バルブを
設けることにより、背圧が任意の数段階に調整できるこ
とは言う１でもない。Furthermore, it is possible to adjust the back pressure to any number of levels by providing a number of pre-pressure control valves, if necessary.

溶融段階終了後、電磁逆転バルブ７が作動され第２図に
示す位置に切換えられ、スライド弁棒１２は第３図の実
線位置すなわち右方向へ変位される。After the melting phase is completed, the electromagnetic reversing valve 7 is actuated and switched to the position shown in FIG. 2, and the slide valve stem 12 is displaced to the solid line position in FIG. 3, that is, to the right.

配管３は弁棒１２の溝１３を通して配管１へ連通され、
一方、配管１は突出部１４ｂにより配管２より遮断され
る。The pipe 3 is communicated with the pipe 1 through the groove 13 of the valve stem 12,
On the other hand, the pipe 1 is cut off from the pipe 2 by the protrusion 14b.

射出圧力は先行圧力制御バルブ６により適宜に調整され
、それに応じて室１６ａ内およびスライド弁棒１２の突
出部１４ａに働く圧力が決定される。The injection pressure is appropriately adjusted by the advance pressure control valve 6, and the pressure acting within the chamber 16a and on the protrusion 14a of the slide valve rod 12 is determined accordingly.

室１６ｂと１６ｃ間の通路の大きさすなわち溝１３ａを
通ｌ〜での流通断面積は弁棒１２の位置により決定され
る。The size of the passage between chambers 16b and 16c, ie the cross-sectional area of flow through groove 13a, is determined by the position of valve stem 12.

作動用水圧あるいはスクリューに働く水圧がバルブ６に
より調整された値１で上がると、このバルブは開き、室
１６ａ内の圧力を下げて弁棒１２を第３図において左方
向へ移動させている。When the operating water pressure or the water pressure acting on the screw increases to a value 1 regulated by the valve 6, this valve opens, lowering the pressure in the chamber 16a and moving the valve stem 12 to the left in FIG.

圧力使用点と接続点Ａ間の圧力損失に応じて、スライド
弁棒１２の右側に働く圧力が変化し弁棒１２は自動的に
正規の位置に移動する。Depending on the pressure loss between the pressure use point and the connection point A, the pressure acting on the right side of the slide valve rod 12 changes, and the valve rod 12 automatically moves to its normal position.

実施例においては、背圧は一段階であり、バルブ６によ
って調整されている。In the embodiment, the back pressure is one step and is regulated by a valve 6.

しかしながら、たとえば相応の電磁逆転バルブあるいは
差動先行圧力制御バルブを通して圧力媒体を供給するこ
とにより、射出段階中の背圧を数段階に調整できる。However, the backpressure during the injection phase can be adjusted in several stages, for example by supplying the pressure medium through a corresponding electromagnetic reversing valve or a differential prepressure control valve.

この方法により、差動射出圧力もセットできる。Differential injection pressures can also be set using this method.

しかしながら、射出速度を圧力とかかわりなく無限に変
化させるために、第２図に示す如く補助ピストン２２は
射出段階の開始と同時に電磁逆転バルブ７により室１６
ｅの後端位置、すなわち第３図にむいて右方向へ移動さ
れ、ツイーンの孔２３”ａの開口端を閉鎖している。However, in order to vary the injection speed infinitely, independent of pressure, the auxiliary piston 22 is moved into the chamber 1 by means of an electromagnetic reversing valve 7 at the beginning of the injection phase, as shown in FIG.
e is moved to the rear end position, that is, to the right as viewed in FIG. 3, and closes the open end of the tween hole 23''a.

室１６ｅのピストン２２左側部に供給される圧力媒体は
孔２４ａ。The pressure medium supplied to the left side of the piston 22 in the chamber 16e is the hole 24a.

２４ｂを通して室１６ｅのピストン２２右側部に導通さ
れ、背圧がスライド弁棒１２に働くこととなる。It is electrically connected to the right side of the piston 22 in the chamber 16e through 24b, and back pressure acts on the slide valve rod 12.

この背圧により射出速度を決定する室１６ｂ。The chamber 16b determines the injection speed based on this back pressure.

１６ｃ間の溝１３ａによって形成された通路の流通断面
積が変化すると共に、ツイーン２３からピストン２２を
離脱する。The flow cross-sectional area of the passage formed by the grooves 13a between the grooves 16c changes, and the piston 22 is removed from the twine 23.

よって、ツイーンの孔２３ａは室１６ｅと連通Ｌ２、圧
力媒体は室１６ｅよりバルブ７内の配管２６を通って配
管２へ、さらに貯蔵タンク２へと流通する。Therefore, the Tween hole 23a communicates with the chamber 16e L2, and the pressure medium flows from the chamber 16e through the pipe 26 in the valve 7 to the pipe 2 and further to the storage tank 2.

ピストン２２の両側間に生ずる圧力変化により、ピスト
ン２２は比較的小さいギャップを形成する１でツイーン
２３から離れ、そのため室１６ｂと１６ｅ間の通路は完
全に閉鎖されない。Due to the pressure change occurring between the sides of piston 22, piston 22 separates from twine 23 at 1 forming a relatively small gap, so that the passage between chambers 16b and 16e is not completely closed.

機構的に軸方向へ調整できるツイーン２３を調整するこ
とにより、通路の流通断面積を任意の大きさとするとこ
ろで圧力の吻合が保持される。By adjusting the tween 23, which is mechanically adjustable in the axial direction, the pressure anastomosis is maintained at any desired size of the flow cross-sectional area of the passage.

上記の如く、先行圧力制御バルブは手動調整されている
。As mentioned above, the advance pressure control valve is manually adjusted.

第４図は他の実施例を示し、先行圧力制御バルブを選択
スイッチ６０により調整するとどもに、背圧の調整を電
気手段により自動的に行っている。FIG. 4 shows another embodiment in which while the advance pressure control valve is adjusted by the selection switch 60, the back pressure is also adjusted automatically by electrical means.

この実施例においては、一個の先行圧力制御バルブのみ
が必要である。In this embodiment, only one pre-pressure control valve is required.

電気的接続はエンドキーを通し、て距離により、あるい
はリレーを通して時間により、さらに前以って選択され
た制御カムを通して無限に変化させて電気的に制御され
る。The electrical connection is electrically controlled by distance through an end key, by time through a relay, and infinitely variable through a preselected control cam.

上記の如きこの考案にかかる制御装置の最大の効果は装
置全体をコンパクトにできることである。The greatest effect of the control device according to this invention as described above is that the entire device can be made compact.

すなわち、制御されるべきピストンの圧力および速度等
の全ての制御が一つの制御装置によりなされると共に、
電磁逆転バルブ、先行圧力制御バルブ等の連結された補
助機材がスライド弁棒と共に組立てられ一つのユニット
を形成している。That is, all the controls such as the pressure and speed of the piston to be controlled are performed by one control device, and
Connected auxiliary equipment such as electromagnetic reversing valve and advance pressure control valve are assembled together with the slide valve stem to form one unit.

言い換えると、先行圧力制御バルブ５，６．電磁逆転パ
ルプ７＄−よび補助ピストン２２が制御用弁棒１２あ・
よびバルブ・・ウジング１０と適宜に組合されたことに
より後述する機能が遂行されている。In other words, the advance pressure control valves 5, 6 . The electromagnetic reversing pulp 7$- and the auxiliary piston 22 are connected to the control valve rod 12a.
and the valve housing 10, the functions described below are performed.

第一に圧力源３とピストンあるいは水圧モータに連結さ
れた圧力使用部への配管１との間及び室１６ｂと室１６
ｃとの間を連通させること。First, between the pressure source 3 and the piping 1 connected to the piston or the hydraulic motor, and between the chamber 16b and the chamber 16.
To communicate with c.

第二に圧力使用部への配管１内の水圧釦よび流体量を前
以って定めた無限に変化しうる値に減少させること。Second, the water pressure button and the fluid volume in the pipe 1 to the pressure-using part are reduced to a predetermined, infinitely variable value.

第三に圧力源３と圧力使用部への配管１との間及び室１
６ｂと室１６ｃとの間の連通を遮断すること。Thirdly, between the pressure source 3 and the piping 1 to the pressure usage part and the chamber 1
6b and chamber 16c.

第四に圧力使用部への配管１と帰り配管２との間及び室
１６ｅと室１６ｄとの間を連通させること。Fourthly, the piping 1 to the pressure-using part and the return piping 2 should be communicated with each other, and the chamber 16e and the chamber 16d should be communicated with each other.

第五に圧力使用部への配管１あるいは室１６ｃと帰り配
管２あるいは外側から働く力により水流体が配管１から
流入する室１６ｄとの間に無限に変化しうる前以って定
めた抵抗を生ぜさせることである。Fifth, a predetermined resistance that can be infinitely varied is established between the pipe 1 or chamber 16c to the pressure-using part and the return pipe 2 or the chamber 16d into which the water fluid flows from the pipe 1 due to a force acting from the outside. It is to bring about.

なチ・、第５図は、消費系にオイル圧力を供給すること
による射出段階を示す第１図に対応した概略フローシー
ト、第６図は、圧力源から消費系へに至る連結の中段状
態を示す第１図に対応した概略フローシートを示すもの
である。Fig. 5 is a schematic flow sheet corresponding to Fig. 1 showing the injection stage by supplying oil pressure to the consumption system, and Fig. 6 shows the intermediate state of the connection from the pressure source to the consumption system. 1 shows a schematic flow sheet corresponding to FIG.

上記の如く、この考案の一実施例については詳細に図示
すると共に記載し、考案の要旨を説明したが、この要旨
の範囲に含斗れる他の変形例もこの考案の範囲に含１れ
るものである。As mentioned above, one embodiment of this invention has been illustrated and described in detail, and the gist of the invention has been explained, but other variations that fall within the scope of this gist are also included in the scope of this invention. It is.

以下、この考案の範囲に包含される実施の態様を列記す
る。Below, embodiments included within the scope of this invention will be listed.

（１）円筒状ガイド部を構成する孔を穿設した・・ウジ
ング内に絞孔に連通させて複数個の通路を設け、該通路
をそれぞれ圧力媒圧源、圧力使用部及び帰り圧力溜めへ
連通すると共に、該孔内に摺動自在に主制御弁棒を挿通
し、かつ、該弁棒を軸方向に働く圧力で作動すると共に
上記通路間の連通を制御するため少くとも一段階で弁棒
の移動方向を変える作動手段を設けたととを特徴とする
射出成型機の溶融ユニット及び射出スクリュー等で用い
る圧力作動ピストンユニットヲ制御する圧力制御装置。(1) Holes constituting the cylindrical guide part are bored...Multiple passages are provided in the housing to communicate with the throttle hole, and these passages are connected to the pressure medium pressure source, the pressure usage part, and the return pressure reservoir, respectively. a master control valve stem is slidably inserted into the hole, and the valve stem is actuated by an axial pressure to control communication between the passages in at least one stage. 1. A pressure control device for controlling a pressure-operated piston unit used in a melting unit, an injection screw, etc. of an injection molding machine, characterized in that it is provided with actuating means for changing the moving direction of a rod.

（２）上記孔に連通ずるようにハウジング上に逆転バル
ブ及び少くとも一つの先行圧力制御バルブを設け、逆転
バルブにより主制御弁棒を変位させ圧力媒体源へ連通す
る通路と圧力使用部へ連通する通路を連通する第一連通
部ち・よび圧力使用部へ連通する通路と帰り圧力媒体溜
めに連通ずる通路を連通ずる第二連通部を解放、閉鎖す
るようにし、また、先行圧力制御バルブにより各通路間
を連通ずる連通部の流通断面積を適宜の太き４とするた
め主制御弁棒を更に変位させるようにした上記（１）記
載の圧力制御装置。(2) A reversing valve and at least one advance pressure control valve are provided on the housing so as to communicate with the above hole, and the reversing valve displaces the main control valve stem and communicates with the passage communicating with the pressure medium source and the pressure using part. A first communication section that communicates the passage that communicates with the pressure-using section and a passage that communicates with the return pressure medium reservoir is opened and closed, and a pre-pressure control valve is provided. The pressure control device according to (1) above, wherein the main control valve rod is further displaced in order to set the flow cross-sectional area of the communication portion communicating between the respective passages to an appropriate thickness.

（３）・・ウジング内の一室に主制御弁棒と連動する補
助ピストンを摺動自在に設けるとともに該室内に同軸方
向に伸びる調整用ツイーンを設けて補助ピストンと当接
させ、該ツイーンにより補助ピストン及び主制御弁棒の
軸方向の一端への動きを制限し、上記第二連通部の最小
流通断面積を決定するようにした上諺１）記載の圧力制
御装置。(3)...An auxiliary piston that interlocks with the main control valve stem is slidably provided in one chamber in the housing, and an adjustment tween extending coaxially within the chamber is provided and brought into contact with the auxiliary piston. The pressure control device according to the above proverb 1), wherein the movement of the auxiliary piston and the main control valve rod toward one end in the axial direction is restricted, and the minimum flow cross-sectional area of the second communication portion is determined.

（４）各先行圧力制御バルブは手動でも調整できる上記
（３）記載の圧力制御装置。(4) The pressure control device according to (3) above, in which each preceding pressure control valve can be adjusted manually.

（５）各先行圧力制御バルブを自動的に調整できる電気
的手段を含む上記（３）記載の圧力制御装置。(5) The pressure control device according to (3) above, including electrical means that can automatically adjust each preceding pressure control valve.

（６）ハウジングの軸方向に適宜の間隔をあけて設けた
上記通路のうち、一端部に位置する第一通路を圧力媒体
源に連通）〜、中間に位置する第二通路を圧力使用部に
連通し、他端部に位置する第三通路を帰り圧力媒体溜め
に連通し、かつ、孔内周面に軸方向に適宜の間隔をあけ
て円環状の凹部を設けて上記第一通路、第二通路、第三
通路にそれぞれ連通する第−室、第二室、第三室を形威
し、さらに主制御弁棒の軸方向の中間に突出部を設け、
弁棒の移動により該突出部で第一通路と第二通路、第二
通路と第三通路の連通部を解放、閉鎖し連通を制御する
ようにした上記（１）記載の圧力制御装置。(6) Of the passages provided at appropriate intervals in the axial direction of the housing, the first passage located at one end communicates with the pressure medium source), and the second passage located in the middle communicates with the pressure usage part. The third passage located at the other end communicates with the return pressure medium reservoir, and annular recesses are provided at appropriate intervals in the axial direction on the inner peripheral surface of the hole. A first chamber, a second chamber, and a third chamber are formed which communicate with the second passage and the third passage, respectively, and a protrusion is provided in the axial middle of the main control valve stem,
The pressure control device according to (1) above, wherein the protruding portion controls the communication by opening and closing the communication portions between the first passage and the second passage, and between the second passage and the third passage, by movement of the valve stem.

（７）主制御弁棒には上記中間突出部の他に突出部を挾
んで軸方向の両側に突出部を設けると共に、一端突出部
と中間突出部の間に第一環状溝を、中間突出部と他端突
出部の間に第二環状溝を設け、該第−環状溝で上記第−
室と第二室とを連通ずる連通部を形成し、第二環状溝で
上記第二室と第三室とを連通ずる連通部を形成した上記
（６）記載の圧力制御装置。(7) In addition to the above-mentioned intermediate protrusion, the main control valve stem is provided with protrusions on both sides in the axial direction sandwiching the protrusion, and a first annular groove is provided between the one end protrusion and the intermediate protrusion. A second annular groove is provided between the part and the other end protrusion, and the second annular groove
The pressure control device according to (6) above, wherein a communication portion is formed to communicate the chamber and the second chamber, and a communication portion is formed to communicate the second chamber and the third chamber through the second annular groove.

（８）・・ウジング内には更に主制御弁棒の一端に隣接
した第四室を設けると共に弁棒の他端に隣接した凹状の
第五室を設け、第五室内に軸方向に摺動自在に補助ピス
トンを設けると共にそのステムを上記孔内に突出させて
主制御弁棒の該端部内に内装したスプリングに当接させ
、かつ第五室内に調整可能な管状ツイーンを突設させて
補助ピストンの外側端部に当接し、それによって第五室
方向への主制御弁棒の変位を限定するようにした上記（
７）記載の圧力制御装置。(8)...Inside the housing, a fourth chamber is further provided adjacent to one end of the main control valve stem, and a concave fifth chamber is provided adjacent to the other end of the valve stem. An auxiliary piston is freely provided, the stem of which protrudes into the hole and comes into contact with a spring housed within the end of the main control valve stem, and an adjustable tubular twin is protruded into the fifth chamber for assistance. The above-described (
7) The pressure control device described.

（９）ハウジング上に電磁的に作動さｒする逆転バルブ
を取り付けると共に、該逆転バルブをヒ記第−室、第四
室に連通ずるためハウジング内に通路を設け、該通路を
介して主制御弁棒の変位を制御するため上記第一、第四
室内に圧力媒体を供給すると共に該室内から圧力媒体Ｔ
ｈｅ出するようにし、また、ハウジング上に少くとも１
つの先行圧力制御バルブを設けると共に該バルブを上記
第四室に連通ずるための通路を設け、上記連通部の流路
断面積を適宜の大きさとするため上記逆転バルブにより
セットされた如く主制御弁棒の軸方向の位置を調整する
ため第四室内の作動流体を供給すると共に該室内より作
動流体を排出するようにし、さらげ、主制御弁棒内にス
プリングを内装した端部から伸びる軸方向の孔を設ける
ど共に絞孔を横断孔を介して第二室じ連通ｌ〜、かつ補
助ピストン内に孔を弁設置〜で該ピストン両側の第五室
両側部分を連通ずるよう〆ζした上記（８）記載の圧力
制御装置。(9) Attach an electromagnetically actuated reversing valve on the housing, and provide a passage in the housing to communicate the reversing valve with the above-mentioned chambers A and 4, and control the main control via the passage. In order to control the displacement of the valve stem, a pressure medium is supplied into the first and fourth chambers, and a pressure medium T is also supplied from the chambers.
He should be exposed, and there should be at least one on the housing.
In addition to providing two preceding pressure control valves, a passage for communicating the valves with the fourth chamber is provided, and in order to make the flow passage cross-sectional area of the communication portion an appropriate size, a main control valve is provided as set by the reversal valve. In order to adjust the axial position of the rod, the working fluid in the fourth chamber is supplied and the working fluid is discharged from the fourth chamber, and the axial direction extending from the end where the spring is installed inside the main control valve rod is exposed. In addition to providing a hole, the throttle hole communicates with the second chamber through a transverse hole, and a hole is installed in the auxiliary piston to communicate with both sides of the fifth chamber on both sides of the piston. (8) The pressure control device described.

００）ハウジング内にスライドバルブハウジングと（〜
で作用する主制御弁棒本体を包含し、先行圧力制御バル
ブ、電磁作動逆転バルブ、主制御弁棒と連動して作用す
る補助ピストン及び以下（ａ）から（ｅ）に記載する機
能を選択的に遂行する主制御弁棒を包含する上畝９）記
載の圧力制御装置。00) Slide valve housing and (~
It includes a main control valve stem body that acts in the main control valve stem, and selectively includes a prepressure control valve, an electromagnetically actuated reversing valve, an auxiliary piston that acts in conjunction with the main control valve stem, and the functions described in (a) to (e) below. 9) The pressure control device according to 9), which includes a main control valve stem.

（ａ） 第−室と第二室を連通して圧力媒体供給源と
圧力使用部を連通ずること。(a) The first chamber and the second chamber are communicated to communicate the pressure medium supply source and the pressure using part.

（ｂ） 第二申開通路および圧力使用部に連通ずる配
管内の圧力媒体の圧力及び量を無限に変化し７うる前以
って定めた値に減少すること。(b) infinitely varying the pressure and quantity of the pressure medium in the piping communicating with the second opening passage and the pressure-using part, reducing it to a predetermined value of 7 minutes;

（ｃ）第−室と第二室間の連通部を遮断して圧力媒体源
ど圧力使用部との連通を遮断すること。(c) Cutting off the communication section between the first chamber and the second chamber to cut off the communication with the pressure medium source and the pressure using section.

（ｄ）上紙ｃ）の遮断と同時に、第二室と第三室とを連
通し圧力使用部と帰り流体溜めを連通ずること。(d) At the same time as shutting off c) above, the second chamber and the third chamber are communicated with each other, and the pressure-using part and the return fluid reservoir are communicated with each other.

（ｅ） 圧力使用部に連通ずる第二室と帰り流体溜め
に連通ずる第三室との間に無限に変化しうる前以って定
めた抵抗を発生せしめ、圧力媒体が圧力使用部に働く外
匡により圧力使用部から第二申開通路および第二室に流
入させること。(e) creating an infinitely variable predetermined resistance between a second chamber communicating with the pressure-using part and a third chamber communicating with the return fluid reservoir, so that the pressure medium acts on the pressure-using part; Flow from the pressure-using part into the second opening passage and the second chamber using an outer envelope.

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

第１図ｄ：この考案に係るプラスチックねじ射出成型機
において使用する制御装置の溶融段階にち・ける圧力媒
体の流れを示す概略フローシート、第２図は射出段階に
釦ける圧力媒体の流れを示す第１図と同様の７０−シー
ト、第３図は第１図および第２図に示しまた制御装置の
主制御バルブの軸方向の断面図、第４図は第１図および
第２図に示した制御装置の他の変形例を示す第１図、第
２図と同様な概略フローシート、第５図は消費系にオイ
ル圧力を供給することによる射出段階を示す第１図に対
応した概略フローシート、第６図は圧力源から消費系へ
に至る連結の中段状態を示す第１図に対応した概略フロ
ーシートである。 １・・・圧力使用部への配管、２・・・帰り流体溜めへ
の配管、３・・・圧力媒体源への配管、４・・・主制御
バルブ、５，６・・・先行圧力制御バルブ、７・・・逆
転バルブ、１１・・・孔、１２・・・弁棒、１３・・・
環状溝、１４・・・突出部、１５・・・リブ、１６・・
・室、２２・・・補助ピストン、２３・・・フイーラ。Figure 1 d: A schematic flow sheet showing the flow of the pressure medium after the melting stage of the control device used in the plastic screw injection molding machine according to this invention. Figure 2 shows the flow of the pressure medium after the button injection stage. 3 is an axial sectional view of the main control valve of the control device; FIG. 4 is an axial sectional view of the main control valve of the control device; 1 and 2 showing another variant of the control device shown, and FIG. 5 a schematic diagram corresponding to FIG. 1 showing the injection stage by supplying oil pressure to the consumer system. Flow Sheet, FIG. 6 is a schematic flow sheet corresponding to FIG. 1 showing the middle stage of the connection from the pressure source to the consumption system. 1... Piping to the pressure usage part, 2... Piping to the return fluid reservoir, 3... Piping to the pressure medium source, 4... Main control valve, 5, 6... Advance pressure control Valve, 7... Reversing valve, 11... Hole, 12... Valve stem, 13...
Annular groove, 14... Projection, 15... Rib, 16...
- Chamber, 22... Auxiliary piston, 23... Feeler.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 円筒状ガイド部を構成する孔１１を穿設した・・ウジフ
グ１０内に絞孔に連通させかつ・・ウジングの軸方向に
適宜の間隔をあけて複数個の通路を設けると共に該孔内
に摺動自在に主制御弁棒１２を挿通し、該弁棒を軸方向
に働く圧力で作動すると共に上記通路間の連通を制御す
るため少くとも一段階毎に弁棒の移動方向を変える作動
手段を設け、かつ上記通路のうち、一端部に位置する第
一通路３を圧力媒体源に連通し、中間に位置する第二通
路１を圧力使用部に連通し、他端部に位置する第三通路
２を帰り圧力媒体溜めに連通シフ、かつ、孔内周面に軸
方向に適宜の間隔をあけて円環状の凹部を設けて上記第
一通路、第二通路、第三通路にそれぞれ連通する第−室
１６ｂ１第二室１６ｃ１第三室１６ｄを形成し、さらに
主制御弁棒１２の軸方向の中間に突出部１４ａｔ１４ｂ
ｔ１４ｃを設け、弁棒１２の移動により該突出部で第一
通路と第二通路、第二通路と第三通路の連通部を開放、
閉鎖し連通を制御するようにし、さらにハウジング１０
内には更に主制御弁棒の一端に隣接した第四室１６ａを
設けると共に弁棒の他端に隣接した凹状の第五室１６ｅ
を設け、かつ上記作動手段としてハウジング１０上には
電磁的に作動される逆転バルブ７を取り付けると共に、
該逆転バルブ２を上記第−室１６ｂ１第四室１６ａに連
通ずるためハウジング１０内に通路を設け、該通路を介
して主制御弁棒１２の変位を制御するため上記第−第四
室１６ｂｔ１６ａ内に圧力媒体を供給すると共に該室内
から圧力媒体を排出するようにし、また、ハウジング１
０上に少くとも１つの先行圧力制御バルブ５，６を設け
ると共に該バルブを上記第四室１６ａに連通ずるための
通路を設けて、上記連通部の流路断面積を適宜の大きさ
とするため、上記逆転バルブ７によりセットされた如く
主制御弁棒１２の軸方向の位置を調整するため第四室１
６ａ内の作動流体を供給すると共に該室内より作動流体
を排出するようにし、さらに、主制御弁棒１２内にスプ
リング２１を内装した端部から伸びる軸方向の孔１９を
設けると共に絞孔を横断孔を介して第二室１６ｃに連通
し、かつ第五室１６ｅ内に軸方向に摺動自在に補助ピス
トン２２を設けると共にそのステムを主制御弁棒１２の
上記孔１９内に突出させて主制御弁棒の該端部内に内装
したスプリング２１に当接させ、かつ第五室１６ｅ内に
上記逆転パルプ７と連通した調整可能な管状フイーラ２
３を突出させて補助ピストン２２の外側端部に当接し、
それによって第五室１６ｅ方向への主制御弁棒１２の変
位を限定するようにすると共に補助ピストン２２内に孔
２４を穿設して該ピストン両側の第五室１６ｅ両側部分
を連通ずるようにしたことを特徴とする射出成型機の溶
融ユニット及び射出スクリュー等で用いる圧力作動ピス
トンユニットを制御する圧力制御装置。A hole 11 constituting a cylindrical guide part is bored...in the Ujifugu 10 to communicate with the throttle hole...a plurality of passages are provided at appropriate intervals in the axial direction of the Uzipuff, and a sliding hole is provided in the hole. A main control valve stem 12 is movably inserted therein, actuating means actuates the valve stem with pressure acting in the axial direction and changes the direction of movement of the valve stem in at least one step in order to control the communication between the passages. Among the passages, a first passage 3 located at one end communicates with the pressure medium source, a second passage 1 located in the middle communicates with the pressure usage part, and a third passage located at the other end. 2 is connected to the return pressure medium reservoir, and annular recesses are provided on the inner circumferential surface of the hole at appropriate intervals in the axial direction to communicate with the first passage, the second passage, and the third passage, respectively. - A chamber 16b1, a second chamber 16c1, a third chamber 16d are formed, and a protrusion 14at14b is formed in the axial middle of the main control valve rod 12.
t14c is provided, and by movement of the valve stem 12, the protruding portion opens the communication portion between the first passage and the second passage, and the second passage and the third passage,
The housing 10 is closed to control communication, and the housing 10
A fourth chamber 16a adjacent to one end of the main control valve stem is further provided within the interior, and a concave fifth chamber 16e adjacent to the other end of the valve stem.
and an electromagnetically actuated reversing valve 7 is attached on the housing 10 as the actuating means,
A passage is provided in the housing 10 for communicating the reversing valve 2 with the fourth chamber 16b1 and the fourth chamber 16a, and a passage is provided in the housing 10 for controlling the displacement of the main control valve rod 12 through the passage. A pressure medium is supplied to the housing 1 and the pressure medium is discharged from the chamber.
At least one advance pressure control valve 5, 6 is provided on the fourth chamber 16a, and a passage is provided for communicating the valve with the fourth chamber 16a, and the cross-sectional area of the passage of the communication portion is set to an appropriate size. , the fourth chamber 1 for adjusting the axial position of the main control valve stem 12 as set by the reversing valve 7.
The working fluid in the chamber 6a is supplied and the working fluid is discharged from the chamber. Furthermore, an axial hole 19 is provided in the main control valve stem 12 extending from the end in which the spring 21 is installed, and crossing the throttle hole. An auxiliary piston 22 is provided in communication with the second chamber 16c through a hole and slidable in the axial direction in the fifth chamber 16e, and its stem projects into the hole 19 of the main control valve stem 12. an adjustable tubular filler 2 abutting a spring 21 housed within the end of the control valve stem and communicating with the reversing pulp 7 in the fifth chamber 16e;
3 protrudes and comes into contact with the outer end of the auxiliary piston 22,
This limits the displacement of the main control valve rod 12 in the direction of the fifth chamber 16e, and a hole 24 is bored in the auxiliary piston 22 to communicate the both sides of the fifth chamber 16e on both sides of the piston. A pressure control device for controlling a pressure-operated piston unit used in a melting unit, an injection screw, etc. of an injection molding machine, characterized in that:
JP1977140595U 1970-11-19 1977-10-18 pressure control device Expired JPS5841366Y2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1719570A CH524075A (en) 1970-11-19 1970-11-19 Hydraulic control device

Publications (2)

Publication Number Publication Date
JPS5372086U JPS5372086U (en) 1978-06-16
JPS5841366Y2 true JPS5841366Y2 (en) 1983-09-19

Family

ID=4423504

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1977140595U Expired JPS5841366Y2 (en) 1970-11-19 1977-10-18 pressure control device

Country Status (8)

Country Link
US (1) US3750705A (en)
JP (1) JPS5841366Y2 (en)
CA (1) CA932241A (en)
CH (1) CH524075A (en)
DE (1) DE2150501A1 (en)
FR (1) FR2115229B1 (en)
GB (1) GB1372593A (en)
IT (1) IT940596B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4638720A (en) * 1980-12-01 1987-01-27 Deere & Company Electro-hydraulic control system
CN102235392A (en) * 2011-05-20 2011-11-09 上海光塑机械制造有限公司 Control device for pilot oil of cartridge valve

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2962002A (en) * 1956-04-10 1960-11-29 Sanders Associates Inc Two-stage hydraulic servo valve
US2983956A (en) * 1958-03-13 1961-05-16 Essex Wire Corp Injection molding machine
US3286734A (en) * 1964-11-16 1966-11-22 Goodyear Tire & Rubber Three way pressure control servo valve
US3520322A (en) * 1965-08-30 1970-07-14 Ford Motor Co Fluid pressure control system
US3508583A (en) * 1965-08-30 1970-04-28 Ford Motor Co Servo control valve
US3410306A (en) * 1966-10-27 1968-11-12 Gen Signal Corp Control valve with lockout element

Also Published As

Publication number Publication date
FR2115229A1 (en) 1972-07-07
FR2115229B1 (en) 1975-07-18
GB1372593A (en) 1974-10-30
CH524075A (en) 1972-06-15
DE2150501A1 (en) 1972-06-08
CA932241A (en) 1973-08-21
IT940596B (en) 1973-02-20
US3750705A (en) 1973-08-07
JPS5372086U (en) 1978-06-16

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