CN104162967B - The fast hydraulic pressure of hydraulic injection molding machine controls device - Google Patents
The fast hydraulic pressure of hydraulic injection molding machine controls device Download PDFInfo
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- CN104162967B CN104162967B CN201410378968.8A CN201410378968A CN104162967B CN 104162967 B CN104162967 B CN 104162967B CN 201410378968 A CN201410378968 A CN 201410378968A CN 104162967 B CN104162967 B CN 104162967B
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 25
- 239000002828 fuel tank Substances 0.000 claims abstract description 33
- 238000002347 injection Methods 0.000 claims abstract description 27
- 239000007924 injection Substances 0.000 claims abstract description 27
- 239000000446 fuel Substances 0.000 claims abstract description 19
- 239000003921 oil Substances 0.000 claims description 84
- 239000010720 hydraulic oil Substances 0.000 claims description 23
- 230000009471 action Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000004044 response Effects 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000008676 import Effects 0.000 abstract 1
- 230000007704 transition Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- B29C45/76—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
- 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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- 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
- B29C2945/76655—Location of control
- B29C2945/76658—Injection unit
- B29C2945/76682—Injection unit injection piston cylinder
-
- 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
- B29C2945/76822—Phase or stage of control
- B29C2945/76876—Switch-over
-
- 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
- B29C2945/76929—Controlling method
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The fast hydraulic pressure that the invention discloses a kind of hydraulic injection molding machine controls device.Servo-driver control signal is connected with driver, and driver is connected with servomotor, and servo motor driven oil pump operates, and filter is taken in oil pump import, and fuel tank divided into by filter, and pressure fuel pump sensor is contained in fuel pump outlet；Unidirectional inserted valve valve port A connects fuel pump outlet, and unidirectional inserted valve valve port B connects pressure valve pick-and-place components valve port A, pressure valve pick-and-place components valve port B connected tank；Direction inserted valve valve port P connects pressure valve pick-and-place components valve port A, direction inserted valve valve port T connected tank, and valve port A, B of direction inserted valve is connected with oil cylinder two chamber valve port；Oil cylinder working-pressure sensor meets direction inserted valve valve port P.This invention ensures that motor, the long-life of oil pump, steady operation, it is ensured that hydraulic system works normally；And meeting big flow rate working conditions and fast response time, control accuracy are high, it is ensured that injection is rapidly completed the conversion in different operating stage, improves production efficiency and Product Precision.
Description
Technical field
The present invention relates to a kind of hydraulic control device, the fast hydraulic pressure of a kind of hydraulic injection molding machine particularly relating to injection machine technical field controls device.
Background technology
The technical process of injection machine is generally divided into several stages such as matched moulds, locked mode, injection, pressurize, plasticizing and die sinking, and pressure and flow required for each stage are different.When injection machine was switched to another step transition by a stage, efficiency that strong influence is molded by the control response speed of the various control devices such as direction valve and precision.As when the injection stage of high-pressure high-flow switches to the packing stage of high pressure low discharge, oil duct pressure is high and needs hydraulic system commutation under heavy traffic condition.Normal hydraulic direction valve valve core movement in the case of high-pressure high-flow is slow and control accuracy is low, not only reduces injection efficiency and greatly affects the precision of final finished.
Furthermore, when injection machine by high pressure phase to relatively low pressure step transition time, the hydraulic oil compressed in oil cylinder can produce resilience, and this can cause oil pump to damage, service life reduction even affects stablizing of hydraulic system.Although the mode accessing common overflow valve used at present solves pressure release problem.But not only cause degradation problem under oil temperature rising, hydraulic oil viscosity serious owing to common overflow valve flowed friction is relatively big, adaptation flow is less, and pressure release is slow, reduces injection efficiency and is molded precision.
Summary of the invention
For overcoming the deficiency of above-mentioned existence, the fast hydraulic pressure that the invention provides a kind of hydraulic injection molding machine controls device, quickly response and the high control precision that ensure the direction valve of injection machine, relief valve in the way of inserted valve, makes injection machine production efficiency and product quality all be improved.
The technical solution used in the present invention is:
The present invention includes driver, servomotor, oil pump, filter, pressure fuel pump sensor, unidirectional inserted valve, pressure valve pick-and-place components, two position two-way valve, pilot pressure governor, oil cylinder working-pressure sensor, direction inserted valve, oil cylinder；Servo-driver control signal is connected with driver by CAN communication mode, driver is connected with servomotor by line of codes, and servo motor driven oil pump operates, and pressure fuel pump sensor is arranged on fuel pump outlet, oil pump inlet is connected with filter, is provided with fuel tank below filter；Unidirectional inserted valve valve port A is connected to fuel pump outlet, and the X chamber of unidirectional inserted valve communicates with unidirectional inserted valve valve port B, and the valve port A of pressure valve pick-and-place components is connected with the valve port B of unidirectional inserted valve, and pressure valve pick-and-place components valve port B connects fuel tank；After two position two-way valve and pilot pressure governor parallel connection, the valve port at two ends is connected with X chamber and the fuel tank of pressure valve pick-and-place components respectively, oil cylinder working-pressure sensor is connected on the valve port A of pressure valve pick-and-place components, the valve port P of direction inserted valve is connected with the valve port A of pressure valve pick-and-place components, valve port A with B of direction inserted valve is connected with propelling valve port and the return cavity valve port of oil cylinder respectively, and the piston rod of oil cylinder is coaxially connected with screw in injection molding machine.
Described direction inserted valve includes first direction valve pick-and-place components, second direction valve pick-and-place components, third direction valve pick-and-place components and fourth direction valve pick-and-place components and guide's three-position four-way valve；Second direction valve pick-and-place components is connected with the valve port A of third direction valve pick-and-place components and constitutes the valve port P of direction inserted valve, and is connected with the valve port P of guide's three-position four-way valve, and the valve port T of guide's three-position four-way valve accesses fuel tank；The valve port B of second direction valve pick-and-place components and the valve port A of first direction valve pick-and-place components is connected and constitutes the valve port A of direction inserted valve, the valve port B of third direction valve pick-and-place components and the valve port A of fourth direction valve pick-and-place components is connected and constitutes the valve port B of direction inserted valve, first direction valve pick-and-place components is connected with the valve port A of guide's three-position four-way valve after communicating with the X chamber of third direction valve pick-and-place components, second direction valve pick-and-place components is connected with the valve port B of guide's three-position four-way valve after communicating with the X chamber of fourth direction valve pick-and-place components, the valve port B of first direction valve pick-and-place components and fourth direction valve pick-and-place components is all connected to fuel tank.
Described pressure fuel pump sensor and oil cylinder working-pressure sensor export pressure fuel pump signal and oil cylinder working-pressure signal respectively.
Described two position two-way valve and guide's three-position four-way valve receive the opening and closing of control signal control valve respectively.
Described pilot pressure governor is by the pressure in the spring regulation oil circuit within regulation.
When oil circuit pressure release, bi-bit bi-pass valve core is closed, and pressure valve pick-and-place components is opened, and unidirectional inserted valve is shut off such that hydraulic oil does not return oil pump, and hydraulic oil enters fuel tank, completes pressure release；When oil circuit pressure is too high, pilot pressure governor overflow, the unlatching of pressure valve pick-and-place components, unidirectional inserted valve is shut off such that hydraulic oil does not return oil pump, and hydraulic oil enters fuel tank, after oil circuit pressure drops to safety value, is closed by pilot pressure governor, and pressure valve pick-and-place components is closed.
When valve port A, the valve port P of guide's three-position four-way valve all communicate with valve port B, the piston rod position of oil cylinder keeps constant, thus fixing screw in injection molding machine so that injection machine carries out pressurize operation；When the valve port A of guide's three-position four-way valve communicates with valve port P, and when valve port P leads to valve port T-phase, the piston rod of oil cylinder is displaced outwardly, thus promotes screw in injection molding machine so that injection machine carries out injection action；When the valve port A of guide's three-position four-way valve leads to valve port T-phase, and when valve port P communicates with valve port B, the piston rod of oil cylinder moves inward, thus drives screw in injection molding machine rollback.
The invention have the benefit that
The invention enables injection machine when different operating phase transition, it is not necessary to the reversion of motor, oil pump gets final product stable pressure release, it is ensured that motor, the long-life of oil pump, steady operation；Inserted valve liquid damping power is little, and oil temperature does not raises, and pressure release inserted valve has relief function, can carry out pressure overload protection, it is ensured that hydraulic system works normally.
The pressure release inserted valve of the present invention and the attachment structure of direction inserted valve not only meet big flow rate working conditions but also fast response time, control accuracy are high, it is ensured that injection is rapidly completed the conversion in different operating stage, improves production efficiency and the Product Precision of injection machine.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
In figure: 1, driver；2, servomotor；3, oil pump；4, filter；5, pressure fuel pump sensor；6, unidirectional inserted valve；7, pressure valve pick-and-place components；8, two position two-way valve；9, pilot pressure governor；10, oil cylinder working-pressure sensor；11, first direction valve pick-and-place components；12, second direction valve pick-and-place components；13, third direction valve pick-and-place components；14, fourth direction valve pick-and-place components；15, guide's three-position four-way valve；16, oil cylinder.
Detailed description of the invention
Below in conjunction with the accompanying drawings and the present invention is described in further detail by specific embodiment.
As it is shown in figure 1, the present invention includes driver 1, servomotor 2, oil pump 3, filter 4, pressure fuel pump sensor 5, unidirectional inserted valve 6, pressure valve pick-and-place components 7, two position two-way valve 8, pilot pressure governor 9, oil cylinder working-pressure sensor 10, direction inserted valve, oil cylinder 16；Servo-driver control signal is connected with driver 1 by CAN communication mode, driver 1 is connected with servomotor 2 by line of codes, and servomotor 2 drives oil pump 3 to operate, and pressure fuel pump sensor 5 is arranged on oil pump 3 and exports, oil pump 3 entrance is connected with filter 4, is provided with fuel tank below filter 4；Unidirectional inserted valve 6 valve port A is connected to oil pump 3 and exports, and the X chamber of unidirectional inserted valve 6 communicates with unidirectional inserted valve 6 valve port B, and the valve port A of pressure valve pick-and-place components 7 is connected with the valve port B of unidirectional inserted valve 6, and pressure valve pick-and-place components 7 valve port B connects fuel tank；After two position two-way valve 8 and pilot pressure governor 9 parallel connection, the valve port at two ends is connected with X chamber and the fuel tank of pressure valve pick-and-place components 7 respectively, oil cylinder working-pressure sensor 10 is connected on the valve port A of pressure valve pick-and-place components 7, the valve port P of direction inserted valve is connected with the valve port A of pressure valve pick-and-place components 7, valve port A with B of direction inserted valve is connected with propelling valve port and the return cavity valve port of oil cylinder 16 respectively, and the piston rod of oil cylinder 16 is coaxially connected with screw in injection molding machine.
As it is shown in figure 1, above-mentioned direction inserted valve specifically includes first direction valve pick-and-place components 11, second direction valve pick-and-place components 12, third direction valve pick-and-place components 13 and fourth direction valve pick-and-place components 14 and guide's three-position four-way valve 15；Second direction valve pick-and-place components 12 is connected with the valve port A of third direction valve pick-and-place components 13 and constitutes the valve port P of direction inserted valve, and is connected with the valve port P of guide's three-position four-way valve 15, and the valve port T of guide's three-position four-way valve 15 accesses fuel tank；The valve port B of second direction valve the pick-and-place components 12 and valve port A of first direction valve pick-and-place components 11 is connected and constitutes the valve port A of direction inserted valve, the valve port B of third direction valve the pick-and-place components 13 and valve port A of fourth direction valve pick-and-place components 14 is connected and constitutes the valve port B of direction inserted valve, first direction valve pick-and-place components 11 is connected with the valve port A of guide's three-position four-way valve 15 after communicating with the X chamber of third direction valve pick-and-place components 13, second direction valve pick-and-place components 12 is connected with the valve port B of guide's three-position four-way valve 15 after communicating with the X chamber of fourth direction valve pick-and-place components 14, the valve port B of first direction valve pick-and-place components 11 and fourth direction valve pick-and-place components 14 is all connected to fuel tank.
Pressure fuel pump sensor 5 and oil cylinder working-pressure sensor 10 export pressure fuel pump signal and oil cylinder working-pressure signal respectively.
Two position two-way valve 8 and guide's three-position four-way valve 15 receive the opening and closing of control signal control valve respectively.
Pilot pressure governor 9 by the pressure in the internal spring regulation oil circuit of regulation, specifically regulates the pressure of the working connection being made up of the valve port B of unidirectional inserted valve 6, oil circuit between the valve port A of pressure valve pick-and-place components 7 and the valve port P of direction inserted valve.
As it is shown in figure 1, when oil circuit pressure release, two position two-way valve 8 spool is closed, pressure valve pick-and-place components 7 is opened, and unidirectional inserted valve 6 is shut off such that hydraulic oil does not return oil pump, and hydraulic oil enters the fuel tank being connected on pilot pressure governor 9, completes pressure release；When oil circuit pressure is too high, pilot pressure governor 9 overflow, pressure valve pick-and-place components 7 is opened, unidirectional inserted valve 6 is shut off such that hydraulic oil does not return oil pump, hydraulic oil enters the fuel tank being connected on pilot pressure governor 9, after oil circuit pressure drops to safety value, being closed by pilot pressure governor 9, pressure valve pick-and-place components 7 is closed.
When the spool by mobile guide's three-position four-way valve 15 so that when the valve port A of guide's three-position four-way valve 15, valve port P all communicate with valve port B, the piston rod position of oil cylinder 16 keeps constant, thus fixing screw in injection molding machine so that injection machine carries out pressurize operation；
When the spool by mobile guide's three-position four-way valve 15, the valve port A making guide's three-position four-way valve 15 communicates with valve port P, and when valve port P leads to valve port T-phase, the piston rod of oil cylinder 16 is displaced outwardly acting, thus promoting screw in injection molding machine so that injection machine carries out injection action；
When the spool by mobile guide's three-position four-way valve 15 so that the valve port A of guide's three-position four-way valve 15 leads to valve port T-phase, and when valve port P communicates with valve port B, the piston rod of oil cylinder 16 moves inward compression, thus drives screw in injection molding machine rollback.
The fuel tank being connected on filter 4, pressure valve pick-and-place components 7, pilot pressure governor 9, first direction valve pick-and-place components 11, fourth direction valve pick-and-place components 14 and guide's three-position four-way valve 15 in the present invention can be same fuel tank, it is alternatively different fuel tanks, the most same fuel tank.
As it is shown in figure 1, the present invention's is embodied as work process:
The X chamber of unidirectional inserted valve 6 communicates with valve port B, has and is unidirectionally controlled function.When hydraulic oil is flowed into by the valve port A of unidirectional inserted valve 6, X cavity pressure is little, and unidirectional inserted valve 6 is opened hydraulic oil and passed through valve port A, flows out from valve port B；When system carries out Overload Protection or pressure release, hydraulic oil is entered unidirectional inserted valve 6 by valve port B, because X chamber communicates with valve port B, pressure is relatively big, and unidirectional inserted valve 6 is closed.
Due to unidirectional inserted valve many employings cone valve type structure, for the ball structure of tradition check valve, internal leakage is the least, without stuck phenomenon.
Two position two-way valve 8 is typically in the state of Guan Bi, scalable pilot pressure governor 9 oil pressure relief value and then the Maximum safe pressure of control system, when system pressure exceedes safe pressure, fuel tank is connected in pilot pressure governor 9 overflow, the X cavity pressure of pressure valve pick-and-place components 7 reduces, pressure valve pick-and-place components 7 is opened, and in working connection, hydraulic oil is entered valve port B pressure release to fuel tank by the valve port A of pressure valve pick-and-place components 7.After working connection pressure reduces predetermined value, pilot pressure governor 9 stops overflow, completes pressure overload protection；
When complete a higher injection phase of pressure such as injection stage after, data according to pressure transducer 10 feedback, control to open signal to two position two-way valve, the X chamber of pressure valve pick-and-place components 7 is connected with fuel tank, pressure reduces, and the hydraulic oil in working connection enters valve port B pressure release to fuel tank from the valve port A of pressure valve pick-and-place components 7.After data system pressure according to oil cylinder working-pressure sensor 10 feedback is reduced to predetermined value, controlling shutdown signal to two position two-way valve, pressure valve pick-and-place components 7 is closed, and completes pressure release.
Pressure valve pick-and-place components uses cone valve type structure, cuts off by the conical surface and seals oil circuit, and spool only need to move less stroke, and oil circuit can realize break-make conversion, is active in one's movements, and is particularly well-suited to the occasion opened at a high speed.
Guide's three-position four-way valve 15 and four direction valve pick-and-place components constitute direction inserted valve.As it is shown in figure 1, when the spool of guide's three-position four-way valve 15 is in centre, the X chamber of four direction pick-and-place components and the valve port P i.e. working connection of direction inserted valve communicate, four direction pick-and-place components is closed, and oil cylinder 16 keeps closed at both ends, keeps injection screw position motionless；
When injecting, to the 1YA power on signal of guide's three-position four-way valve 15, spool to the left, as shown in Figure 1.Now, the valve port A of first direction valve pick-and-place components 11 and the X chamber of third direction valve pick-and-place components 13 and guide's three-position four-way valve 15 communicates, the valve port A of guide's three-position four-way valve connects with the valve port P of guide's three-position four-way valve, and the valve port P of guide's three-position four-way valve 15 and the valve port P i.e. working connection of direction inserted valve communicate.Second direction valve pick-and-place components 12 is connected with the valve port B of guide's three-position four-way valve 15 with the X chamber of fourth direction valve pick-and-place components 14, and valve port B connects with valve port T, accesses fuel tank；So second direction valve pick-and-place components 12 and fourth direction valve pick-and-place components 14 are opened, the hydraulic oil of working connection enters from valve port P, through second direction valve pick-and-place components 12, go out from the valve port B of second direction valve pick-and-place components 12, entering the propelling valve port of oil cylinder 16, i.e. left chamber in Fig. 1, the hydraulic oil in oil cylinder 16 return cavity enters the valve port A of fourth direction valve pick-and-place components 14, the valve port B going out fourth direction valve pick-and-place components 14 enters fuel tank, and oil cylinder 16 completes injection action.
When the piston rod of oil cylinder is return, to the 2YA power on signal of guide's three-position four-way valve 15, spool is to the right.Valve port A and T and valve port B and P of guide's three-position four-way valve 15 communicate respectively.First direction valve pick-and-place components 11 and third direction valve pick-and-place components 13 are opened, and second direction valve pick-and-place components 12 and fourth direction valve pick-and-place components 14 are closed.Working connection hydraulic oil enters from the valve port A of third direction valve pick-and-place components 13, enters the right chamber of oil cylinder 16 through valve port B, and oil cylinder 16 left chamber hydraulic oil is entered by the valve port A of first direction valve pick-and-place components 11, is connected with fuel tank through valve port B.Oil cylinder 16 completes to return.
Owing to direction controlling function and the pipeline circulating function of direction inserted valve are undertaken by guide's three-position four-way valve and direction valve pick-and-place components respectively, compared with traditional three-position four-way valve, direction valve pick-and-place components latus rectum is big, thus flow damping is little, negotiability is big, is particularly well-suited to the occasion of big flow.
According to the pressure data of pressure fuel pump sensor 5 feedback, servomechanism control signal controls driver 1, and driver 1 controls servomotor 2, and servomotor 2 drives oil pump 3 to operate at the appropriate speed, it is ensured that injection moulding process stability of flow, pressure balance.
Above-mentioned detailed description of the invention is used for illustrating the present invention rather than limiting the invention, in the protection domain of spirit and claims of the present invention, and any modifications and changes that the present invention is made, both fall within protection scope of the present invention.
Claims (7)
1. the fast hydraulic pressure of a hydraulic injection molding machine controls device, it is characterised in that: include driver (1), servomotor (2), oil pump (3), filter (4), pressure fuel pump sensor (5), unidirectional inserted valve (6), pressure valve pick-and-place components (7), two position two-way valve (8), pilot pressure governor (9), oil cylinder working-pressure sensor (10), direction inserted valve, oil cylinder (16)；Servo-driver control signal is connected with driver (1) by CAN communication mode, driver (1) is connected with servomotor (2) by line of codes, servomotor (2) drives oil pump (3) operating, pressure fuel pump sensor (5) is arranged on oil pump (3) outlet, oil pump (3) entrance is connected with filter (4), and filter (4) lower section is provided with fuel tank；Unidirectional inserted valve (6) valve port A is connected to oil pump (3) outlet, the X chamber of unidirectional inserted valve (6) communicates with unidirectional inserted valve (6) valve port B, the valve port A of pressure valve pick-and-place components (7) is connected with the valve port B of unidirectional inserted valve (6), and pressure valve pick-and-place components (7) valve port B connects fuel tank；After two position two-way valve (8) and pilot pressure governor (9) parallel connection, the valve port at two ends is connected with X chamber and the fuel tank of pressure valve pick-and-place components (7) respectively, oil cylinder working-pressure sensor (10) is connected on the valve port A of pressure valve pick-and-place components (7), the valve port P of direction inserted valve is connected with the valve port A of pressure valve pick-and-place components (7), valve port A with B of direction inserted valve is connected with propelling valve port and the return cavity valve port of oil cylinder (16) respectively, and the piston rod of oil cylinder (16) is coaxially connected with screw in injection molding machine.
The fast hydraulic pressure of a kind of hydraulic injection molding machine the most according to claim 1 controls device, it is characterised in that: described direction inserted valve includes first direction valve pick-and-place components (11), second direction valve pick-and-place components (12), third direction valve pick-and-place components (13) and fourth direction valve pick-and-place components (14) and guide's three-position four-way valve (15)；Second direction valve pick-and-place components (12) is connected with the valve port A of third direction valve pick-and-place components (13) and constitutes the valve port P of direction inserted valve, and be connected with the valve port P of guide's three-position four-way valve (15), the valve port T of guide's three-position four-way valve (15) accesses fuel tank；The valve port B of second direction valve pick-and-place components (12) and the valve port A of first direction valve pick-and-place components (11) is connected and constitutes the valve port A of direction inserted valve, the valve port B of third direction valve pick-and-place components (13) and the valve port A of fourth direction valve pick-and-place components (14) is connected and constitutes the valve port B of direction inserted valve, first direction valve pick-and-place components (11) is connected with the valve port A of guide's three-position four-way valve (15) after communicating with the X chamber of third direction valve pick-and-place components (13), second direction valve pick-and-place components (12) is connected with the valve port B of guide's three-position four-way valve (15) after communicating with the X chamber of fourth direction valve pick-and-place components (14), the valve port B of first direction valve pick-and-place components (11) and fourth direction valve pick-and-place components (14) is all connected to fuel tank.
The fast hydraulic pressure of a kind of hydraulic injection molding machine the most according to claim 1 controls device, it is characterised in that: described pressure fuel pump sensor (5) and oil cylinder working-pressure sensor (10) export pressure fuel pump signal and oil cylinder working-pressure signal respectively.
The fast hydraulic pressure of a kind of hydraulic injection molding machine the most according to claim 2 controls device, it is characterised in that: described two position two-way valve (8) and guide's three-position four-way valve (15) receive the opening and closing of control signal control valve respectively.
The fast hydraulic pressure of a kind of hydraulic injection molding machine the most according to claim 1 controls device, it is characterised in that: described pilot pressure governor (9) is by the pressure in the spring regulation oil circuit within regulation.
The fast hydraulic pressure of a kind of hydraulic injection molding machine the most according to claim 1 controls device, it is characterized in that: when oil circuit pressure release, two position two-way valve (8) spool is closed, pressure valve pick-and-place components (7) is opened, unidirectional inserted valve (6) is shut off such that hydraulic oil does not return oil pump, hydraulic oil enters fuel tank, completes pressure release；When oil circuit pressure is too high, pilot pressure governor (9) overflow, pressure valve pick-and-place components (7) is opened, unidirectional inserted valve (6) is shut off such that hydraulic oil does not return oil pump, hydraulic oil enters fuel tank, after oil circuit pressure drops to safety value, being closed by pilot pressure governor (9), pressure valve pick-and-place components (7) is closed.
The fast hydraulic pressure of a kind of hydraulic injection molding machine the most according to claim 2 controls device, it is characterized in that: when valve port A, the valve port P of guide's three-position four-way valve (15) all communicate with valve port B, the piston rod position of oil cylinder (16) keeps constant, thus fix screw in injection molding machine so that injection machine carries out pressurize operation；When the valve port A of guide's three-position four-way valve (15) communicates with valve port P, and when valve port P leads to valve port T-phase, the piston rod of oil cylinder (16) is displaced outwardly, thus promotes screw in injection molding machine so that injection machine carries out injection action；When the valve port A of guide's three-position four-way valve (15) leads to valve port T-phase, and when valve port P communicates with valve port B, the piston rod of oil cylinder (16) moves inward, thus drives screw in injection molding machine rollback.
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| CN105856524B (en) * | 2016-05-13 | 2018-05-25 | 芜湖虹飞机械有限公司 | A kind of flow velocity corrects pattern tool automatically |
| CN111059101B (en) * | 2019-11-07 | 2022-01-11 | 中冶宝钢技术服务有限公司 | Big arm oil cylinder control valve group |
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