CN104476741B - Oil hydraulic circuit for synchronously controlling mould locking oil cylinder and mould transferring oil cylinder of injection molding machine - Google Patents

Oil hydraulic circuit for synchronously controlling mould locking oil cylinder and mould transferring oil cylinder of injection molding machine Download PDF

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CN104476741B
CN104476741B CN201410754968.3A CN201410754968A CN104476741B CN 104476741 B CN104476741 B CN 104476741B CN 201410754968 A CN201410754968 A CN 201410754968A CN 104476741 B CN104476741 B CN 104476741B
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oil
valve
hydraulic
electro
reversing valve
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CN104476741A (en
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磨斌国
邓文谦
杨伟杰
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Guangdong Baojie Precision Machinery Co ltd
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Powerjet Plastic Machinery Co ltd
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/64—Mould opening, closing or clamping devices
    • B29C45/67—Mould opening, closing or clamping devices hydraulic

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

Abstract

本发明公开了一种注塑机锁模油缸与移模油缸同步控制液压回路，包括锁模油缸C、电液换向阀V6、移模油缸D、叠加式单向节流阀V20、电磁换向阀V8、逻辑单向阀V3、换向阀V2、直动式溢流阀V4和电液比例先导式溢流阀V5；电液换向阀V6的进油口P与液压油路进油端连接，电液换向阀V6的回油口T与电磁换向阀V8的进油口P连接，电磁换向阀V8的回油口T与油箱连接，逻辑单向阀V3两个主油路接口分别与电液换向阀V6的回油口T和油箱连接，逻辑单向阀V3的控制油路接口与换向阀V2连接，换向阀V2回油口T连接油箱；直动式溢流阀V4和电液比例先导式溢流阀V5的进油口连接换向阀V2工作油口，出油口连接油箱。本发明能实现锁模油缸与移模油缸同步动作。

The invention discloses a synchronous control hydraulic circuit of a mold locking cylinder and a mold shifting oil cylinder of an injection molding machine, comprising a mold locking cylinder C, an electro-hydraulic reversing valve V6, a mold shifting oil cylinder D, a superimposed one-way throttle valve V20, an electromagnetic reversing Valve V8, logic one-way valve V3, reversing valve V2, direct-acting relief valve V4 and electro-hydraulic proportional pilot relief valve V5; the oil inlet P of the electro-hydraulic reversing valve V6 and the oil inlet port of the hydraulic oil circuit Connection, the oil return port T of the electro-hydraulic reversing valve V6 is connected to the oil inlet P of the electromagnetic reversing valve V8, the oil return port T of the electromagnetic reversing valve V8 is connected to the fuel tank, and the two main oil circuits of the logic check valve V3 The interface is respectively connected with the oil return port T of the electro-hydraulic reversing valve V6 and the oil tank, the control oil circuit interface of the logic check valve V3 is connected with the reversing valve V2, and the oil return port T of the reversing valve V2 is connected with the oil tank; the direct-acting overflow The oil inlet ports of the flow valve V4 and the electro-hydraulic proportional pilot relief valve V5 are connected to the working oil port of the reversing valve V2, and the oil outlet is connected to the oil tank. The invention can realize the synchronous action of the clamping oil cylinder and the mold moving oil cylinder.

Description

注塑机锁模油缸与移模油缸同步控制液压回路Synchronous Control Hydraulic Circuit of Clamping Cylinder and Transferring Cylinder of Injection Molding Machine

技术领域technical field

本发明涉及注塑机技术领域，具体涉及一种用于控制注塑机锁模油缸与移模油缸同步动作的液压回路。The invention relates to the technical field of injection molding machines, in particular to a hydraulic circuit for controlling the synchronous action of a clamping oil cylinder and a mold moving oil cylinder of an injection molding machine.

背景技术Background technique

目前现有的注塑机其锁模油缸进油口和移模油缸进油口是分别通过一个换向阀与一个双联泵的两个油泵连接的，锁模油缸和移模油缸分别独立动作，无法实现同步动作。At present, the oil inlet of the clamping cylinder and the oil inlet of the mold-moving cylinder of the existing injection molding machine are respectively connected to two oil pumps of a double pump through a reversing valve, and the mold-locking cylinder and the mold-moving cylinder operate independently. Unable to achieve synchronous action.

发明内容Contents of the invention

针对现有技术的不足，本发明旨在提供一种能实现控制锁模油缸与移模油缸同步动作的注塑机锁模油缸与移模油缸同步控制液压回路。Aiming at the deficiencies of the prior art, the present invention aims to provide a synchronous control hydraulic circuit for the mold locking cylinder and the mold moving cylinder of an injection molding machine capable of controlling the synchronous action of the mold clamping cylinder and the mold moving cylinder.

为实现上述目的，本发明采用如下技术方案：To achieve the above object, the present invention adopts the following technical solutions:

注塑机锁模油缸与移模油缸同步控制液压回路，包括锁模油缸C、电液换向阀V6、移模油缸D、叠加式单向节流阀V20和电磁换向阀V8,所述锁模油缸C其进油口C1与电液换向阀V6的第一工作油口A连接，其回油口C2与电液换向阀V6的第二工作油口B连接，电液换向阀V6的进油口P连接液压油路进油端；所述移模油缸D其进油口D1经过叠加式单向节流阀V20与电磁换向阀V8的第一工作油口A连接，其回油口D2经过叠加式单向节流阀V20与电磁换向阀V8的第二工作油口B连接，电磁换向阀V8的回油口T连接油箱，所述电磁换向阀V8的进油口P与所述电液换向阀V6的回油口T连接，所述电液换向阀V6的回油口T与油箱管路之间并联连接有一个逻辑单向阀V3,该逻辑单向阀V3的两个主油路接口分别与电液换向阀V6的回油口T和油箱连接，逻辑单向阀V3的控制油路接口连接换向阀V2的进油口P，换向阀V2的第一工作油口A与电液比例先导式溢流阀V5的进油口连接，电液比例先导式溢流阀V5的回油口与油箱连接，换向阀V2的第二工作油口B与直动式溢流阀V4的进油口连接，直动式溢流阀V4的回油口与油箱连接，上述换向阀V2的回油口T与油箱连接。Injection molding machine clamping cylinder and mold shifting cylinder synchronously control the hydraulic circuit, including mold clamping cylinder C, electro-hydraulic reversing valve V6, mold shifting cylinder D, superimposed one-way throttle valve V20 and electromagnetic reversing valve V8, the lock The oil inlet C1 of the mold oil cylinder C is connected to the first working oil port A of the electro-hydraulic directional valve V6, and its oil return port C2 is connected to the second working oil port B of the electro-hydraulic directional valve V6, and the electro-hydraulic directional valve The oil inlet P of V6 is connected to the oil inlet end of the hydraulic oil circuit; the oil inlet D1 of the mold shifting cylinder D is connected to the first working oil port A of the electromagnetic reversing valve V8 through the stacked one-way throttle valve V20. The oil return port D2 is connected to the second working oil port B of the electromagnetic reversing valve V8 through the stacked one-way throttle valve V20, the oil return port T of the electromagnetic reversing valve V8 is connected to the oil tank, and the inlet of the electromagnetic reversing valve V8 The oil port P is connected to the oil return port T of the electro-hydraulic reversing valve V6, and a logic check valve V3 is connected in parallel between the oil return port T of the electro-hydraulic reversing valve V6 and the oil tank pipeline. The two main oil circuit interfaces of the check valve V3 are respectively connected to the oil return port T of the electro-hydraulic reversing valve V6 and the oil tank, and the control oil circuit interface of the logic check valve V3 is connected to the oil inlet P of the reversing valve V2. The first working oil port A of the directional valve V2 is connected to the oil inlet port of the electro-hydraulic proportional pilot relief valve V5, the oil return port of the electro-hydraulic proportional pilot relief valve V5 is connected to the oil tank, and the second port of the reversing valve V2 The working oil port B is connected to the oil inlet port of the direct acting relief valve V4, the oil return port of the direct acting relief valve V4 is connected to the oil tank, and the oil return port T of the reversing valve V2 is connected to the oil tank.

本发明具有如下有益效果：The present invention has following beneficial effects:

本发明能实现锁模油缸与移模油缸同步动作，解决了目前注塑机其锁模油缸进油口和移模油缸进油口是分别通过一个换向阀与一个双联泵的两个油泵连接，锁模油缸和移模油缸分别独立动作，无法实现同步动作的问题。The invention can realize the synchronous action of the clamping oil cylinder and the mold-moving oil cylinder, and solves the problem that the oil inlet of the mold-locking cylinder and the oil inlet of the mold-moving cylinder of the current injection molding machine are respectively connected to two oil pumps of a double pump through a reversing valve , The clamping cylinder and the mold-moving cylinder act independently, and the problem of synchronous action cannot be realized.

附图说明Description of drawings

图1为本发明注塑机锁模油缸与移模油缸同步控制液压回路的示意图。Fig. 1 is a schematic diagram of the synchronous control hydraulic circuit of the clamping cylinder and the mold-moving cylinder of the injection molding machine according to the present invention.

具体实施方式detailed description

下面结合附图及具体实施例，对本发明作进一步的描述，以便于更清楚的理解本发明要求保护的技术思想。In the following, the present invention will be further described in conjunction with the accompanying drawings and specific embodiments, so as to understand more clearly the technical idea claimed in the present invention.

如图1所示本发明注塑机锁模油缸与移模油缸同步控制液压回路，包括锁模油缸C、电液换向阀V6、移模油缸D、叠加式单向节流阀V20、电磁换向阀V8、逻辑单向阀V3、换向阀V2、直动式溢流阀V4和电液比例先导式溢流阀V5，其中所述锁模油缸C的进油口C1与电液换向阀V6的第一工作油口A连接，其回油口C2与电液换向阀V6的第二工作油口B连接，电液换向阀V6的进油口P连接液压油路进油端，电液换向阀V6的回油口T与电磁换向阀V8的进油口P连接，电磁换向阀V8的第一工作油口A经过叠加式单向节流阀V20与移模油缸D的进油口D1连接，电磁换向阀V8的第二工作油口B经过叠加式单向节流阀V20与移模油缸D的回油口D2连接，电磁换向阀V8的回油口T与油箱连接。所述逻辑单向阀V3并联接入在电液换向阀V6的回油口T与油箱管路之间，该逻辑单向阀V3的两个主油路接口分别与电液换向阀V6的回油口T和油箱连接；换向阀V2的进油口P与上述逻辑单向阀V3的控制油路接口连接，换向阀V2的第一工作油口A与电液比例先导式溢流阀V5的进油口连接，电液比例先导式溢流阀V5的回油口与油箱连接，换向阀V2的第二工作油口B与直动式溢流阀V4的进油口连接，直动式溢流阀V4的回油口与油箱连接，换向阀V2的回油口T与油箱连接。As shown in Fig. 1 , the mold locking cylinder and the mold shifting cylinder of the injection molding machine of the present invention synchronously control the hydraulic circuit, including the mold clamping cylinder C, the electro-hydraulic reversing valve V6, the mold shifting cylinder D, the superimposed one-way throttle valve V20, the electromagnetic commutator Directional valve V8, logic one-way valve V3, reversing valve V2, direct-acting relief valve V4 and electro-hydraulic proportional pilot relief valve V5, wherein the oil inlet C1 of the clamping cylinder C is connected to the electro-hydraulic reversing The first working oil port A of the valve V6 is connected, and its oil return port C2 is connected with the second working oil port B of the electro-hydraulic directional valve V6, and the oil inlet P of the electro-hydraulic directional valve V6 is connected to the oil inlet port of the hydraulic oil circuit , the oil return port T of the electro-hydraulic reversing valve V6 is connected to the oil inlet P of the electromagnetic reversing valve V8, and the first working oil port A of the electromagnetic reversing valve V8 passes through the stacked one-way throttle valve V20 and the mold transfer cylinder The oil inlet D1 of D is connected, the second working oil port B of the electromagnetic reversing valve V8 is connected with the oil return port D2 of the mold transfer cylinder D through the superimposed one-way throttle valve V20, and the oil return port of the electromagnetic reversing valve V8 T is connected with the fuel tank. The logical one-way valve V3 is connected in parallel between the oil return port T of the electro-hydraulic reversing valve V6 and the fuel tank pipeline, and the two main oil circuit interfaces of the logical one-way valve V3 are connected with the electro-hydraulic reversing valve V6 respectively. The oil return port T of the reversing valve V2 is connected to the oil tank; the oil inlet P of the reversing valve V2 is connected to the control oil circuit interface of the above-mentioned logic check valve V3, and the first working oil port A of the reversing valve V2 is connected to the electro-hydraulic proportional pilot overflow The oil inlet port of the flow valve V5 is connected, the oil return port of the electro-hydraulic proportional pilot relief valve V5 is connected with the oil tank, and the second working oil port B of the reversing valve V2 is connected with the oil inlet port of the direct acting relief valve V4 , the oil return port of the direct-acting relief valve V4 is connected to the oil tank, and the oil return port T of the reversing valve V2 is connected to the oil tank.

本发明的工作原理为：锁模时，电液换向阀V6上电磁铁YA6端收到信号，电液换向阀V6的进油口P与电液换向阀V6的第一工作油口A导通，电液换向阀V6的第二工作油口B与电液换向阀V6的回油口T导通，液压能转化为机械能，锁模油缸C活塞向右运动，推动模板向右运动；与此同时，电液比例先导式溢流阀V5收到可变信号并调节逻辑单向阀V3的开启压力，从而控制电液换向阀V6的回油口T背压力；利用该回油口T背压力，电磁换向阀V8上电磁铁YA10端收到信号，电磁换向阀V8的进油口P与电磁换向阀V8的第一工作油口A导通，电磁换向阀V8的第二工作油口B与电磁换向阀V8的回油口T导通，调节叠加式单向节流阀V20，移模油缸D活塞向右运动，完成锁模油缸C与移模油缸D同步向右运动动作。The working principle of the present invention is: when the mold is locked, the YA6 end of the electromagnet on the electro-hydraulic reversing valve V6 receives a signal, and the oil inlet P of the electro-hydraulic reversing valve V6 and the first working oil port of the electro-hydraulic reversing valve V6 A conducts, the second working oil port B of the electro-hydraulic reversing valve V6 conducts with the oil return port T of the electro-hydraulic reversing valve V6, the hydraulic energy is converted into mechanical energy, and the clamping cylinder C piston moves to the right, pushing the template to the right At the same time, the electro-hydraulic proportional pilot relief valve V5 receives a variable signal and adjusts the opening pressure of the logic check valve V3, thereby controlling the back pressure of the oil return port T of the electro-hydraulic reversing valve V6; using this The back pressure of the oil return port T, the YA10 end of the electromagnet on the electromagnetic reversing valve V8 receives a signal, the oil inlet P of the electromagnetic reversing valve V8 conducts with the first working oil port A of the electromagnetic reversing valve V8, and the electromagnetic reversing valve The second working oil port B of the valve V8 is connected to the oil return port T of the electromagnetic reversing valve V8, and the superimposed one-way throttle valve V20 is adjusted, and the piston of the mold-moving cylinder D moves to the right to complete the clamping cylinder C and the mold-moving Oil cylinder D moves to the right synchronously.

开模时，电液换向阀V6上电磁铁YA5端收到信号，电液换向阀V6的进油口P与电液换向阀V6的第二工作油口B导通，电液换向阀V6的第一工作油口A与电液换向阀V6的回油口T导通，液压能转化为机械能，锁模油缸C活塞向左运动，拉动模板向左运动；与此同时，换向阀V2上电磁铁YA3端收到信号，换向阀V2的进油口P与换向阀V2的第二工作油口B导通，换向阀V2的第一工作油口A与换向阀V2的回油口T导通，再通过直动式溢流阀V4调节逻辑单向阀V3的开启压力，完成开模一段动作；待完成开模一段动作后，撤销换向阀V2上的电磁铁YA3端信号，同时电液比例先导式溢流阀V5收到可变信号，调节逻辑单向阀V3的开启压力，进而控制电液换向阀V6的回油口T背压力，利用该背压力，电磁换向阀V8上电磁铁YA9端收到信号，电磁换向阀V8的进油口P与电磁换向阀V8的第二工作油口B导通，电磁换向阀V8的第一工作油口A与电磁换向阀V8的回油口T导通，调节叠加式单向节流阀V20，移模油缸D活塞向左运动，完成锁模油缸C与移模油缸D同步向左运动动作。When the mold is opened, the YA5 end of the electromagnet on the electro-hydraulic directional valve V6 receives a signal, the oil inlet P of the electro-hydraulic directional valve V6 is connected to the second working oil port B of the electro-hydraulic directional valve V6, and the electro-hydraulic directional valve V6 The first working oil port A of the directional valve V6 is connected with the oil return port T of the electro-hydraulic directional valve V6, the hydraulic energy is converted into mechanical energy, the piston of the clamping cylinder C moves to the left, and the template is pulled to move to the left; at the same time, The electromagnet YA3 terminal on the reversing valve V2 receives a signal, the oil inlet P of the reversing valve V2 is connected to the second working oil port B of the reversing valve V2, and the first working oil port A of the reversing valve V2 is connected to the reversing valve. The oil return port T of the valve V2 is connected, and then the opening pressure of the logic check valve V3 is adjusted through the direct-acting relief valve V4, and the mold opening stage is completed; after the mold opening stage is completed, the reversing valve V2 is canceled At the same time, the electro-hydraulic proportional pilot relief valve V5 receives a variable signal to adjust the opening pressure of the logic check valve V3, and then controls the back pressure of the oil return port T of the electro-hydraulic reversing valve V6. With this back pressure, the YA9 end of the electromagnet on the electromagnetic reversing valve V8 receives a signal, the oil inlet P of the electromagnetic reversing valve V8 conducts with the second working oil port B of the electromagnetic reversing valve V8, and the valve of the electromagnetic reversing valve V8 The first working oil port A is connected to the oil return port T of the electromagnetic reversing valve V8, and the superimposed one-way throttle valve V20 is adjusted, the piston of the mold transfer cylinder D moves to the left, and the synchronization of the mold clamping cylinder C and the mold transfer cylinder D is completed. Movement action to the left.

对于本领域的技术人员来说，可根据以上描述的技术方案以及构思，做出其它各种相应的改变以及变形，而所有的这些改变以及变形都应该属于本发明权利要求的保护范围之内。For those skilled in the art, various other corresponding changes and modifications can be made according to the technical solutions and ideas described above, and all these changes and modifications should fall within the protection scope of the claims of the present invention.

Claims (1)

1. injection moulding machine mode-locking oil cylinder and mould shifting oil cylinder Synchronization Control hydraulic circuit, including Mode-locking oil cylinder（C）, electro-hydraulic reversing valve （V6）, mould shifting oil cylinder（D）, stacked unidirectional throttle valve（V20）And solenoid directional control valve（V8）, described Mode-locking oil cylinder（C）Its oil-feed Mouthful（C1）With electro-hydraulic reversing valve（V6）First actuator port connect, its oil return opening（C2）With electro-hydraulic reversing valve（V6）The second work Make hydraulic fluid port to connect, electro-hydraulic reversing valve（V6）Oil-in connect hydraulic circuit oil inlet end；Described mould shifting oil cylinder（D）Its oil-in （D1）Through stacked unidirectional throttle valve（V20）With solenoid directional control valve（V8）First actuator port connect, its oil return opening（D2） Through stacked unidirectional throttle valve（V20）With solenoid directional control valve（V8）Second actuator port connect, solenoid directional control valve（V8）'s Oil return opening connect fuel tank it is characterised in that：Described solenoid directional control valve（V8）Oil-in and described electro-hydraulic reversing valve（V6）Return Hydraulic fluid port connects, described electro-hydraulic reversing valve（V6）Oil return opening and fuel tank pipeline between be connected in parallel to a logic check valve （V3）, this logic check valve（V3）Two working connection interfaces respectively with electro-hydraulic reversing valve（V6）Oil return opening and fuel tank connect, Logic check valve（V3）Oil circuit control interface connect reversal valve（V2）Oil-in, reversal valve（V2）The first actuator port with Electric-hydraulic proportion pilot operated compound relief valve（V5）Oil-in connect, electric-hydraulic proportion pilot operated compound relief valve（V5）Oil return opening and fuel tank even Connect, reversal valve（V2）The second actuator port and direct-acting overflow valve（V4）Oil-in connect, direct-acting overflow valve（V4）'s Oil return opening is connected with fuel tank, above-mentioned reversal valve（V2）Oil return opening be connected with fuel tank.
CN201410754968.3A 2014-12-11 2014-12-11 Oil hydraulic circuit for synchronously controlling mould locking oil cylinder and mould transferring oil cylinder of injection molding machine Active CN104476741B (en)

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CN107366648B (en) * 2017-09-11 2023-08-29 徐工集团工程机械股份有限公司 Hydraulic control system of paver screed
CN109779988A (en) * 2019-01-25 2019-05-21 张家港市意久机械有限公司 New hydraulic system
CN111605155A (en) * 2019-02-26 2020-09-01 涌镇液压机械（上海）有限公司 Proportional electro-hydraulic reversing valve for injection molding machine opening and closing
CN110499798B (en) * 2019-07-29 2021-12-28 雷沃工程机械集团有限公司 Explosion-proof valve, hydraulic control system, hydraulic control method and excavator

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DE4209392C2 (en) * 1992-03-23 1995-10-12 Krauss Maffei Ag Mold closing device for an injection molding machine
WO1995032856A1 (en) * 1994-06-01 1995-12-07 Sodick Co., Ltd. Straight hydraulic mold clamping system
CN2623439Y (en) * 2003-02-26 2004-07-07 上海银杏实业有限公司 Mode locking mechanism of four-jar two-board differential fast moving mode full hydraulic pressure plastic jetting machine
CN101927539B (en) * 2009-06-26 2014-05-14 北京化工大学 Isometric replaceable four-cylinder line-lock two-plate type mould clamping mechanism
CN202357398U (en) * 2011-11-28 2012-08-01 浙江大学 Double-valve parallel mould adjusting and mould locking system of two-plate injection molding machine

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