CN207156388U - A kind of injection machine injection hydraulic circuit for realizing high response injection - Google Patents
A kind of injection machine injection hydraulic circuit for realizing high response injection Download PDFInfo
- Publication number
- CN207156388U CN207156388U CN201721225684.0U CN201721225684U CN207156388U CN 207156388 U CN207156388 U CN 207156388U CN 201721225684 U CN201721225684 U CN 201721225684U CN 207156388 U CN207156388 U CN 207156388U
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- Prior art keywords
- injection
- valve
- oil
- pressure
- hydraulic pump
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Links
- 238000002347 injection Methods 0.000 title claims abstract description 136
- 239000007924 injection Substances 0.000 title claims abstract description 136
- 230000004044 response Effects 0.000 title claims abstract description 25
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 239000002828 fuel tank Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 2
- 239000003182 parenteral nutrition solution Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 41
- 230000009471 action Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a kind of injection machine for realizing high response injection to inject hydraulic circuit, including injection cylinder（3）With with injection cylinder（3）Connected working connection, described injection machine injection hydraulic circuit also include control oil circuit, and control oil circuit is by second solenoid valve（4）, the second overflow valve（5）And inserted valve（6）Composition, hydraulic pump system（1）Safe pressure be P1, second solenoid valve（4）Operating pressure be P2, P1 is more than P2.The beneficial effects of the utility model are：Pass through the oil inlet in injection solenoid directional control valve（Pressure oil-in）One control oil circuit of increase, it instead of accumulator complicated in existing oil circuit, pass through overflow valve and the interoperation of inserted valve, making injection machine, system pressure oil is always to maintain constant pressure, flow before the injection, injection machine is set to obtain higher injection response in injection, injection repeatable accuracy is improved on the basis of equipment energy consumption is reduced, improves the production efficiency of injection machine.
Description
Technical field
A kind of injection machine injection hydraulic circuit for realizing high response injection is the utility model is related to, belongs to mold injection machine oil
Road systems technology field.
Background technology
The injection response of injection machine when being pointed injection injection speed accelerate to time used in maximum from zero, the time is shorter
Performance is better.Injection molding particularly with thin wall plastic products, it is necessary to very high injection speed, injection response be one very
Crucial performance indications, generally faster injection response are more prone to injection moulding, and required clamp force is also smaller.Traditional
Injection loop does not have controlling brancher, it is impossible to realize injection before acceleration in advance, can only action of injection start after just accelerated to from zero
Setting value, injection property is had a strong impact on.
In order to improve injection response, the loop with accumulator is used mostly in existing injection machine injection hydraulic circuit.
This loop is to increase accumulator apparatus in fuel pump outlet, and action of injection always provides pressure oil by accumulator and acted, by
Flow, pressure can not be adjusted in itself in accumulator, it is necessary to control injection cylinder to be injected using the proportioning valve of costliness, and
No matter actual act needs what kind of speed, pressure, hydraulic oil all must be filled with accumulator with maximum pressure first, made by oil pump
Into higher energy consumption.
In addition, because action of injection is carried out after always following locked mode action closely, existing injection loop and its control mode
Can be because after the completion of locked mode, pressure, which declines, has a process, and the process can not possibly be all identical each time, such
The state of system pressure oil is different before words are injected each time, therefore injection repeatable accuracy can be caused bad, in order to eliminate
Such deviation, often increase a time delay before the injection to treat pressure stability, so as to cause production efficiency to decline.
The content of the invention
The purpose of this utility model is overcome the deficiencies in the prior art, there is provided a kind of injection machine for realizing high response injection
Hydraulic circuit is injected, injection repeatable accuracy can be improved on the basis of equipment energy consumption is reduced, improve the production efficiency of injection machine.
The purpose of this utility model is achieved through the following technical solutions：A kind of injection machine for realizing high response injection
Inject hydraulic circuit, including injection cylinder and the working connection that is connected with injection cylinder, be provided with working connection hydraulic pump system with
And first solenoid directional control valve, described injection machine injection hydraulic circuit also include control oil circuit, control oil circuit by second solenoid valve,
Second overflow valve and inserted valve composition, the control port of inserted valve connect with oil inlet, the oil inlet and working connection of inserted valve
The oil inlet connection of upper first solenoid directional control valve, the control port of inserted valve are switched and the second overflow valve by second solenoid valve
Oil inlet break-make, the oil return opening of the second overflow valve, inserted valve and second solenoid valve is connected to fuel tank, hydraulic pump system
Safe pressure is P1, and the operating pressure of second solenoid valve is P2, and P1 is more than P2.
Include hydraulic pump as preferable, described hydraulic pump system, drive the servomotor of hydraulic pump, hydraulic pump goes out
Hydraulic fluid port realizes the break-make with two working chambers of injection cylinder by the first solenoid directional control valve, and the first solenoid directional control valve is 3-position 4-way
Valve.
As overflow branch road and oil pressure sensor is provided with preferable, described working connection, it is provided with overflow branch road
First overflow valve, the first overflow valve is main in working connection to play level pressure overflow, and voltage stabilizing, system unloaded and safeguard protection are made
With.
It is two-position three-way valve as preferable, described second solenoid valve.
As being provided with high-pressure hose attachment structure on preferable, described working connection, high-pressure hose attachment structure can be with
With on some moving components, software has certain ductility, can be adjusted with the movement of dynamic model on injection machine.
The oil return opening of the first described solenoid directional control valve connects with fuel tank.
The beneficial effects of the utility model are：Pass through the oil inlet in injection solenoid directional control valve（Pressure oil-in）Increase by one
Individual control oil circuit, instead of accumulator complicated in existing oil circuit, by overflow valve and the interoperation of inserted valve, make injection machine
System pressure oil is always to maintain constant pressure, flow before the injection, that is to say, that the state before action of injection is always constant not
Become, injection machine is obtained higher injection response in injection, note is improved on the basis of equipment energy consumption is reduced
Repeatable accuracy is penetrated, improves the production efficiency of injection machine, while there is the characteristics of simple in construction, easy to use.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation that the utility model controls oil circuit.
In figure, 1- hydraulic pump systems, the solenoid directional control valves of 2- first, 3- injection cylinders, 4- second solenoid valves, the overflows of 5- second
Valve, 6- inserted valves, 7- fuel tanks, 101- hydraulic pumps, 102- servomotors, 103- oil pressure sensors, the overflow valves of 104- first.
Embodiment
The technical solution of the utility model, but the scope of protection of the utility model are described in further detail below in conjunction with the accompanying drawings
It is not limited to as described below.
As shown in figure 1, a kind of injection machine injection hydraulic circuit for realizing high response injection, including injection cylinder 3 and with note
The connected working connection of oil cylinder 3 is penetrated, the solenoid directional control valve 2 of hydraulic pump system 1 and first, described injection machine are provided with working connection
Injecting hydraulic circuit also includes control oil circuit, and control oil circuit is made up of second solenoid valve 4, the second overflow valve 5 and inserted valve 6,
The control port of inserted valve 6 connects with oil inlet, the oil-feed of the first solenoid directional control valve 2 on the oil inlet and working connection of inserted valve 6
Mouthful connection, the control port of inserted valve 6 switch the break-make with the oil inlet of the second overflow valve 5 by second solenoid valve 4, and second
The oil return opening of overflow valve 5, inserted valve 6 and second solenoid valve 4 is connected to fuel tank 7, and the safe pressure of hydraulic pump system 1 is P1,
The operating pressure of second solenoid valve 4 is P2, and P1 is more than P2.
Described hydraulic pump system 1 includes hydraulic pump 101, drives the servomotor 102 of hydraulic pump 101, hydraulic pump 101
Oil-out is realized with the break-make of 3 two working chambers of injection cylinder by the first solenoid directional control valve 2 so as to realize stretching for injection cylinder 3
Exhibition, the operating mode shunk and stopped, the first solenoid directional control valve 2 is three-position four-way valve.
Overflow branch road and oil pressure sensor 103 are provided with described working connection, the first overflow is provided with overflow branch road
Valve 104, oil pressure sensor 103 can reflect the oil pressure on working connection in real time, be easy to observation and record.
Described second solenoid valve 4 is two-position three-way valve.
High-pressure hose attachment structure is provided with described working connection.
The oil return opening of the first described solenoid directional control valve 2 connects with fuel tank 7.
Specifically, as shown in Fig. 2 being provided with P mouths on the first solenoid directional control valve 2（Oil inlet）, T mouths（Oil return opening）, B mouths
（Oil-out）, when second solenoid valve 4 is not actuated, the P mouths of the first solenoid directional control valve 2 are obstructed, the control chamber of second solenoid valve 4（With
Control port connects）With working chamber（Connected with oil inlet）Pressure be pressure P1 in working connection, when second solenoid valve 4 opens
After dynamic, the P mouths connection B mouths of the first solenoid directional control valve 2, and by the pressure release of the second overflow valve 5, pressure is P2 in oil circuit, makes injection
Machine system pressure oil before injection is always to maintain constant pressure, flow, that is to say, that the state before action of injection is always constant
Constant, injection machine is obtained higher injection response in injection.
A kind of injection machine injection hydraulic circuit injection control method for realizing high response injection, it is comprised the steps of：
S1, pressure are preset：Before injection machine dispatches from the factory, the safe pressure for checking and adjusting the second overflow valve 5 is P2, is checked simultaneously
And the safe pressure for adjusting hydraulic pump system 1 is P1, P1 is bigger 5-15bar than P2；
S2, injection premise preacceleration：Before being injected after injection moulding machine mode-locking, the hydraulic pump 101 in hydraulic pump system 1 is added
Carry, while open second solenoid valve 4, make pressure limit in system in the safe pressure P2 of the second overflow valve 5, hydraulic pump 101 with
The setting pressure P2 of electromagnetic relief valve 4 accelerates to maximal rate Vmax；
S3, injection：During injection, open the first solenoid directional control valve 2 and simultaneously close off second solenoid valve 4, pressure oil enters injection
Oil cylinder 3 carries out the safe pressure P1 of action of injection, now system, once action of injection starts, hydraulic pump 101 just presses injection technique
The speed V1 work of setting, continues action of injection, until injection is completed.
The safe pressure P2 of the second described overflow valve 5 is 160-170bar, and the safe pressure P1 of hydraulic pump system 1 is
170-180bar。
The safe pressure P1 of described hydraulic pump system 1 is adjusted by the first overflow valve 104 on overflow branch road
's.
Technique initialization speed V1 of the described hydraulic pump 101 in injection accelerates in advance before the injection less than hydraulic pump 101
Maximal rate Vmax.
Due in the present invention, the acceleration in advance before being injected after injection moulding machine mode-locking, acceleration time 100-250ms
Afterwards then hydraulic pump 101 can be such that injection machine is rapidly responded in injection to reach a stable state, with
Constant pressure and speed is molded, and in injection loop the second overflow valve 5 safe pressure P2 than hydraulic pump system 1 peace
The small 5-15bar of total pressure P1, the setting of injection premise preacceleration can effectively make hydraulic pump 101 be in a higher response
Grade, compared to existing manner of execution, hydraulic pump 101 can only action of injection start after just accelerate to setting value from zero, seriously
Injection property is have impact on, and present invention hydraulic pump 101 in injection is at higher response grade, so ensures that injection
Machine is molded in injection with constant pressure and default speed, and injection quality is higher, while is molded the response time faster,
30-60ms can be reached.And existing control mode is after the completion of working as locked mode, by 100ms ~ 300ms delay（During this delay
Between length depend on system pressure decline speed）, now oil pump be not loaded with, pressure drops to stable shape in waiting system
State, then start to inject, it is seen that the response of injection machine is slower.Wherein, the switching of the overflow valve 104 of second solenoid valve 4 and first is equal
Controlled using PLC.
It can be seen that the present invention is to increase a control oil circuit in the pressure oil-in of injection solenoid directional control valve 2.Oil circuit will be controlled
In the pressure of second solenoid valve 4 be set as a higher pressure P2（The maximum system pressure of injection machine can be generally set to）,
But less than the safe pressure P1 of hydraulic pump system 1（Set by the overflow valve for being arranged on prexxure of the hydraulic pump oil export）.When entering
During row injection, second solenoid valve 4 is first opened, while hydraulic pump 101 accelerates to maximum speed with the setting pressure P2 of second solenoid valve 4
Then degree, the time of the accelerated motion can open the first solenoid directional control valve 2 and close second solenoid valve by controlling computer to set
4, pressure oil enters injection cylinder 3 and carries out action of injection, once action of injection starts, hydraulic pump 101 is just by suitable injection work
The speed of skill setting, pressure duty, continue action of injection, until injection is completed.
Described above is only the preferred embodiment of the present invention, it should be understood that the present invention is not limited to described herein
Form, the exclusion to other embodiment is not to be taken as, and can be used for various other combinations, modification and environment, and can be at this
In the text contemplated scope, it is modified by the technology or knowledge of above-mentioned teaching or association area.And those skilled in the art are entered
Capable change and change does not depart from the spirit and scope of the present invention, then all should be in the protection domain of appended claims of the present invention
It is interior.
Claims (6)
1. a kind of injection machine injection hydraulic circuit for realizing high response injection, including injection cylinder（3）With with injection cylinder（3）Phase
Working connection even, hydraulic pump system is provided with working connection（1）And first solenoid directional control valve（2）, hydraulic pump system（1）Including
Hydraulic pump（101）, driving hydraulic pump（101）Servomotor（102）, it is characterised in that described injection machine parenteral solution pushes back
Road also includes control oil circuit, and control oil circuit is by second solenoid valve（4）, the second overflow valve（5）And inserted valve（6）Composition, inserting
Valve（6）Control port connected with oil inlet, inserted valve（6）Oil inlet and working connection on the first solenoid directional control valve（2）Enter
Hydraulic fluid port connects, inserted valve（6）Control port pass through second solenoid valve（4）To switch and the second overflow valve（5）Oil inlet
Break-make, the second overflow valve（5）, inserted valve（6）And second solenoid valve（4）Oil return opening be connected to fuel tank（7）, hydraulic pump system
（1）Safe pressure be P1, second solenoid valve（4）Operating pressure be P2, P1 is more than P2.
A kind of 2. injection machine injection hydraulic circuit for realizing high response injection according to claim 1, it is characterised in that institute
The hydraulic pump stated（101）Oil-out pass through the first solenoid directional control valve（2）Realization and injection cylinder（3）Two working chambers it is logical
It is disconnected, the first solenoid directional control valve（2）For three-position four-way valve.
A kind of 3. injection machine injection hydraulic circuit for realizing high response injection according to claim 1, it is characterised in that institute
Overflow branch road and oil pressure sensor are provided with the working connection stated（103）, the first overflow valve is provided with overflow branch road（104）.
A kind of 4. injection machine injection hydraulic circuit for realizing high response injection according to claim 1, it is characterised in that institute
The second solenoid valve stated（4）For two-position three-way valve.
A kind of 5. injection machine injection hydraulic circuit for realizing high response injection according to claim 1, it is characterised in that institute
High-pressure hose attachment structure is provided with the working connection stated.
A kind of 6. injection machine injection hydraulic circuit for realizing high response injection according to claim 1, it is characterised in that institute
The first solenoid directional control valve stated（2）Oil return opening and fuel tank（7）Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721225684.0U CN207156388U (en) | 2017-09-22 | 2017-09-22 | A kind of injection machine injection hydraulic circuit for realizing high response injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721225684.0U CN207156388U (en) | 2017-09-22 | 2017-09-22 | A kind of injection machine injection hydraulic circuit for realizing high response injection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207156388U true CN207156388U (en) | 2018-03-30 |
Family
ID=61723662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721225684.0U Withdrawn - After Issue CN207156388U (en) | 2017-09-22 | 2017-09-22 | A kind of injection machine injection hydraulic circuit for realizing high response injection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207156388U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107498813A (en) * | 2017-09-22 | 2017-12-22 | 成都市联余精密机械有限公司 | A kind of injection machine injection hydraulic circuit and its injection control method for realizing high response injection |
| CN112659505A (en) * | 2020-12-23 | 2021-04-16 | 富强鑫(宁波)精密科技股份有限公司 | Hydraulic circuit of injection molding machine and control method |
| CN114001059A (en) * | 2021-08-25 | 2022-02-01 | 海天塑机集团有限公司 | V-shaped injection hydraulic oil way of injection molding machine |
-
2017
- 2017-09-22 CN CN201721225684.0U patent/CN207156388U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107498813A (en) * | 2017-09-22 | 2017-12-22 | 成都市联余精密机械有限公司 | A kind of injection machine injection hydraulic circuit and its injection control method for realizing high response injection |
| CN107498813B (en) * | 2017-09-22 | 2024-09-20 | 成都市联余精密机械有限公司 | Injection hydraulic circuit of injection molding machine for realizing high-response injection and injection control method of injection hydraulic circuit |
| CN112659505A (en) * | 2020-12-23 | 2021-04-16 | 富强鑫(宁波)精密科技股份有限公司 | Hydraulic circuit of injection molding machine and control method |
| CN114001059A (en) * | 2021-08-25 | 2022-02-01 | 海天塑机集团有限公司 | V-shaped injection hydraulic oil way of injection molding machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180330 Effective date of abandoning: 20240920 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180330 Effective date of abandoning: 20240920 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |