CN105500649B - Two-plate injection machine pull bar self correcting system - Google Patents
Two-plate injection machine pull bar self correcting system Download PDFInfo
- Publication number
- CN105500649B CN105500649B CN201511013990.3A CN201511013990A CN105500649B CN 105500649 B CN105500649 B CN 105500649B CN 201511013990 A CN201511013990 A CN 201511013990A CN 105500649 B CN105500649 B CN 105500649B
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- Prior art keywords
- valve
- pull bar
- pressure
- oil
- injection machine
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Classifications
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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
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/67—Mould opening, closing or clamping devices hydraulic
-
- 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
- B29C45/7653—Measuring, controlling or regulating mould clamping forces
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76498—Pressure
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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
Two-plate injection machine pull bar self correcting system, including injection machine backward stick action oil circuit, and increase hydraulic system and control system.The present invention uses independent hydraulic control circuit for four pull bars, it is capable of the oil-feed and oil return action of each oil cylinder of independent control, and then it is capable of the locked mode pressure of separately adjustable Mode-locking oil cylinder, so that relay suffered by four pull bars can reach each self-balancing, bar stress is corrected in the course of the work, in the extending pull rod life-span, improve the performance of injection machine.
Description
Technical field
The present invention relates to the control system of two-plate injection machine pull bar stress.
Background technology
Four pull bars of two-plate injection machine during locked mode simultaneously stress, if four pull bar discontinuity equalizations, meeting
Machine performance is influenceed, reduces the pull bar life-span.
Existing two-plate injection machine controls four pull bars simultaneously by an injection machine backward stick action oil circuit, every pull bar by
Power all same.This oil circuit can not individually adjust the stress of every pull bar, thus can cause the discontinuity equalization of four pull bars, from
And the pull bar life-span can be reduced.
The content of the invention
Technical problem solved by the invention is to overcome the disadvantages mentioned above of prior art and provide a kind of two-plate injection machine
Pull bar self correcting system, four pull bar stress can be corrected automatically, so as to correct bar stress, extending pull rod in the course of the work
In the life-span, improve machine performance.
Technical scheme is used by the present invention solves above-mentioned technical problem：
Two-plate injection machine pull bar self correcting system, including injection machine backward stick action oil circuit, it is characterised in that：Injection machine is drawn
Increase hydraulic system and control system in bar action oil circuit；
Control system includes installing locked mode force measuring sensors on every pull bar of four pull bars, and each clamp force measurement passes
The tension that sensor detects each pull bar is transferred to PLC, and PLC is by each tension collected with each setting
Definite value is compared, and outputs control signals to hydraulic circuit of the clamp force beyond the pull bar of nominal error scope；
Hydraulic system：Increase pressure control loop respectively in two-plate injection machine pull bar each acts oil circuit and enter fuel-displaced
Loop, disengaging oil return line include inserted valve and direction valve, and direction valve controls the unlatching of inserted valve, with the use of control Mode-locking oil cylinder
Enter fuel-displaced action, pressure control loop includes pressure valve and proportional pressure valve, control loop pressure, the output letter of control system
Number control proportional pressure valve；
During high-voltage lock mould, each direction valve opens each inserted valve, Mode-locking oil cylinder oil-feed simultaneously；During pressure release, each direction
Each inserted valve is opened in valve control, and the public direction valve of whole oil circuit opens public inserted valve and realizes oil return.
If locked mode force measuring sensors detect that the stress of some pull bar exceeds normal scope, if stress is less than normal, control
For device processed by controlling three inserted valves corresponding to the closing of its excess-three direction valve, the direction valve of the pull bar opens corresponding inserting
Valve, while the pressure of automatic adjustment height pressure control loop pressure valve is to certain value, the Mode-locking oil cylinder oil-feed of the pull bar, so as to heighten
The stress of pull bar.If the pull bar stress is bigger than normal, controller by control its excess-three direction valve close corresponding to three inserted valves,
The direction valve of the pull bar opens corresponding inserted valve, while automatically turns down the pressure of pressure control loop pressure valve to certain value,
Mode-locking oil cylinder reduces circuit pressure, so that the pull bar stress reduces through pressure control loop overflow.
Compared with prior art, the advantage of the invention is that：Independent hydraulic control circuit, energy are used for four pull bars
The oil-feed and oil return action of each oil cylinder of enough independent controls, and then it is capable of the locked mode pressure of separately adjustable Mode-locking oil cylinder, so that
Relay suffered by four pull bars can reach each self-balancing, correct bar stress in the course of the work, in the extending pull rod life-span, improve note
The performance of molding machine.
Brief description of the drawings
Fig. 1 is the control principle drawing of two-plate injection machine pull bar self correcting system of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
As shown in figure 1, two-plate injection machine pull bar self correcting system, including hydraulic system and control system.
For hydraulic system by taking pull bar 1 as an example, P mouths are working connection hydraulic fluid port, and Mode-Locking Cavity of the hydraulic oil through inserted valve V5 and pull bar 1 connects
Logical, direction valve V1 controls the break-make of locked mode oil circuit by controlling inserted valve control chamber oil pressure cntrol inserted valve V5 folding.
Pressure valve V9 and V15 form the pressure of second voltage regulation loop modulation locked mode oil circuit.
Remaining each hydraulic system of pull bar 2,3,4 is similar with pull bar 1.
Inserted valve V5, V6, V7 and V8 outlet are connected with public inserted valve V13, and inserted valve V13 is by public direction valve
V14 is controlled, and public direction valve V14, public inserted valve V13 collectively constitute pressure release loop.
Control system includes：Clamp force strain sensing instrument is installed on four pull bars, detects the tension of each pull bar, PLC
Controller examinations simultaneously gather strain data, and the data collected and the optimal deflection of pull bar under specific clamp force are entered
Row compares, and when departure exceeds setting, controller is controlled by control terminal D1, D2, D3, D4 and D14 output voltage signal
Corresponding direction valve events, so as to control corresponding inserted valve folding, and then control the break-make of locked mode oil circuit.
Controller controls DP1, DP2, DP3 and DP4 signal output by exporting analog value, so as to control corresponding each drawing
The oil liquid pressure of lever lock die cavity, and then realize the deflection of the corresponding pull bar of adjust automatically.
Hydraulic control：Add one group of pressure control loop respectively in two trigger backward stick action oil circuits and enter fuel-displaced time
Road, now it is described in detail according to Fig. 1 by taking pull bar 1 as an example.
Inserted valve V5 and direction valve V1 enters fuel-displaced action, pressure valve V9 and ratio pressure with the use of control Mode-locking oil cylinder
The decomposition pressure control loop of valve 15.When four pull bar stress are identical, four pull bar control oil circuit pressures are identical, high-voltage lock mould
When, inserted valve V5, V6, V7 and V8, Mode-locking oil cylinder oil-feed simultaneously are opened in direction valve V1, V2, V3 and V4 control.During pressure release, direction
Inserted valve V5, V6, V7 and V8 are opened in valve V1, V2, V3 and V4 control, and it is real that public inserted valve V13 is opened in public direction valve V14 controls
Existing oil return.If locked mode force measuring sensors detect that the stress of single pull bar exceeds normal scope, by taking pull bar 1 as an example, such as
Fruit stress is less than normal, then controller sends instruction, opens the disengaging oil return line of pull bar 1, closes entering fuel-displaced go back to for other three pull bars
Road, i.e., inserted valve V6, V7 and V8 are closed by control direction valve V2, V3 and V4, control direction valve V1 opens inserted valve V5, simultaneously
Automatic adjustment height pressure control loop V9 pressure is to certain value, the Mode-locking oil cylinder oil-feed of pull bar 1, so as to heighten the stress of pull bar 1.Such as
Fruit stress is bigger than normal, and controller closes inserted valve V6, V7 and V8 by control direction valve V2, V3 and V4, and control direction valve V1 is opened
Inserted valve V5, while automatically turn down pressure control loop V9 pressure to certain value, Mode-locking oil cylinder through pressure control loop overflow,
Circuit pressure is reduced, so that the stress of pull bar 1 reduces.
In figure：
V1, V2, V3, V4, V14 represent the direction valve of control inserted valve folding.
V5, V6, V7, V8, V13 represent the inserted valve of control locked mode oil circuit break-make.
V9, V10, V11, V12 represent the pressure valve of control locked mode pressure
V15, V16, V17, V18 represent the proportional pressure valve of control locked mode pressure
P represents system high pressure oil.
H represents low pressure oil return.
Dotted line represents control oil circuit.
Solid line represents working connection.
Claims (1)
1. two-plate injection machine pull bar self correcting system, including injection machine backward stick action oil circuit, it is characterised in that：Injection machine pull bar
Acting increases hydraulic system and control system in oil circuit；
Control system includes installing locked mode force measuring sensors, each locked mode force measuring sensors on every pull bar of four pull bars
The tension for detecting each pull bar is transferred to PLC, and PLC is by each tension collected and each setting value
It is compared, outputs control signals to hydraulic system of the clamp force beyond the pull bar of nominal error scope；
Hydraulic system：Increase pressure control loop respectively in two-plate injection machine pull bar each acts oil circuit and enter fuel-displaced time
Road, disengaging oil return line include inserted valve and direction valve, and direction valve controls the unlatching of inserted valve, with the use of control Mode-locking oil cylinder
Enter fuel-displaced action, pressure control loop includes pressure valve and proportional pressure valve, control loop pressure, the output signal of control system
Control proportional pressure valve；
During high-voltage lock mould, each direction valve opens each inserted valve, Mode-locking oil cylinder oil-feed simultaneously；During pressure release, each direction valve control
System opens each inserted valve, and the public direction valve of whole oil circuit opens public inserted valve and realizes oil return；
If locked mode force measuring sensors detect that the stress of some pull bar exceeds normal scope, if stress is less than normal, controller
By controlling three inserted valves corresponding to the closing of its excess-three direction valve, the direction valve of the pull bar opens corresponding inserted valve, together
When automatic adjustment height pressure control loop pressure valve pressure to certain value, the Mode-locking oil cylinder oil-feed of the pull bar, so as to heighten pull bar
Stress；If the pull bar stress is bigger than normal, controller is by controlling three inserted valves corresponding to the closing of its excess-three direction valve, the drawing
The direction valve of bar opens corresponding inserted valve, while automatically turns down the pressure of pressure control loop pressure valve to certain value, locked mode
Oil cylinder reduces circuit pressure through pressure control loop overflow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511013990.3A CN105500649B (en) | 2015-12-31 | 2015-12-31 | Two-plate injection machine pull bar self correcting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511013990.3A CN105500649B (en) | 2015-12-31 | 2015-12-31 | Two-plate injection machine pull bar self correcting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105500649A CN105500649A (en) | 2016-04-20 |
| CN105500649B true CN105500649B (en) | 2018-01-02 |
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| CN201511013990.3A Active CN105500649B (en) | 2015-12-31 | 2015-12-31 | Two-plate injection machine pull bar self correcting system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109760281A (en) * | 2018-12-29 | 2019-05-17 | 宁波长飞亚塑料机械制造有限公司 | A kind of modified two-plate type injection machine mode locking pressure release oil circuit |
| CN112959634B (en) * | 2021-02-04 | 2022-07-26 | 北京化工大学 | Method for setting optimal mold clamping force of injection molding machine |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101224625B (en) * | 2007-12-05 | 2011-01-19 | 广东佳明机器有限公司 | High pressure model-locked loop of double movable plate direct press injection machine |
| CN201483731U (en) * | 2009-08-04 | 2010-05-26 | 宁波千普机械制造有限公司 | Clamping mechanism of fully hydraulic injection molding machine |
| CN101992532B (en) * | 2010-10-29 | 2014-04-02 | 华南理工大学 | System and method for automatically regulating clamping force of motor-driven injection molding machine |
| CN102407593B (en) * | 2011-11-28 | 2013-09-04 | 浙江大学 | Double-valve parallel mode adjusting and locking system for two-plate injection molding machine |
| CN203077567U (en) * | 2012-08-22 | 2013-07-24 | 仁兴机械（深圳）有限公司 | Independent tooth matching device for four brake units of two-plate direct press type mold clamping mechanism |
| CN102837404B (en) * | 2012-09-06 | 2015-07-29 | 泰瑞机器股份有限公司 | Clamping Device of Injection Moulding Machine and mold clamping force balance adjusting method thereof |
| CN203046184U (en) * | 2012-11-30 | 2013-07-10 | 海天塑机集团有限公司 | Injection mold locking oil channel of two-plate type injection molding machine |
| CN103753785A (en) * | 2013-12-31 | 2014-04-30 | 海天塑机集团有限公司 | Method for monitoring mould clamping force of injection molding machine |
| CN103950144B (en) * | 2014-03-31 | 2016-07-06 | 广东顺德立信精密机械有限公司 | Electric-hydraulic combined formula injection (mo(u)lding) machine and control method thereof |
| CN104369336A (en) * | 2014-12-04 | 2015-02-25 | 无锡格兰机械集团有限公司 | Clamping force regulator of injection molding machine |
| CN205497998U (en) * | 2015-12-31 | 2016-08-24 | 海天塑机集团有限公司 | Two board -like injection molding machine pull rod self system |
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