CN104162967A - Quick hydraulic control device of hydraulic injection molding machine - Google Patents

Quick hydraulic control device of hydraulic injection molding machine Download PDF

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Publication number
CN104162967A
CN104162967A CN201410378968.8A CN201410378968A CN104162967A CN 104162967 A CN104162967 A CN 104162967A CN 201410378968 A CN201410378968 A CN 201410378968A CN 104162967 A CN104162967 A CN 104162967A
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China
Prior art keywords
valve
pressure
pick
place components
valve port
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Granted
Application number
CN201410378968.8A
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Chinese (zh)
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CN104162967B (en
Inventor
张树有
高彦哲
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Zhejiang University ZJU
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Zhejiang University ZJU
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/82Hydraulic or pneumatic circuits
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76494Controlled parameter
    • B29C2945/76498Pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76655Location of control
    • B29C2945/76658Injection unit
    • B29C2945/76682Injection unit injection piston cylinder
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76822Phase or stage of control
    • B29C2945/76876Switch-over
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76929Controlling method

Abstract

The invention discloses a quick hydraulic control device of a hydraulic injection molding machine. A control signal of a servo driver is connected with a driver; the driver is connected with a servo motor; the servo motor drives an oil pump to run; an inlet of the oil pump is connected with a filter; an oil tank is arranged below the filter; an oil pump pressure sensor is mounted at an outlet of the oil pump; a valve opening A of a unidirectional cartridge valve is connected with the outlet of the oil pump; a valve opening B of the unidirectional cartridge valve is connected with a valve opening A of a pressure valve insertion piece; a valve opening B of the pressure valve insertion piece is connected with the oil tank; a valve opening P of a direction cartridge valve is connected with the valve opening A of the pressure valve insertion piece; a valve opening T of the direction cartridge valve is connected with the oil tank; the valve openings A and B of the direction cartridge valve are connected with two cavity valve openings of an oil cylinder; and an oil cylinder pressure sensor is connected with the valve opening P of the direction cartridge valve. The quick hydraulic control device of the hydraulic injection molding machine guarantees long service lives and stable work of the motor and the oil pump and ensures that a hydraulic system works normally; a high-flow working condition is met; furthermore, the quick hydraulic control device is high in response speed and high in control precision and ensures that the injection molding speed is high and different working stages are switched; and the production efficiency and the precision of a product are improved.

Description

The fast hydraulic pressure control device of hydraulic injection molding machine
Technical field
The present invention relates to a kind of hydraulic control device, relate in particular to the fast hydraulic pressure control device of a kind of hydraulic injection molding machine of injection machine technical field.
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 needed pressure of each stage and flow are different.In the time that injection machine was switched to another step transition by a stage, the control response speed of the various control device such as direction valve will affect efficiency and the precision of injection moulding greatly.As in the time that the injection stage of high-pressure high-flow switches to the packing stage of high pressure low discharge, oil duct pressure is high and need the commutation of hydraulic system under heavy traffic condition.Common hydraulic directional valve is slow and control accuracy is low in the situation bottom spool motion of the large flow of high pressure, has not only reduced injection moulding efficiency but also has greatly affected the precision of final finished.
Moreover, when injection machine by high pressure phase when compared with periods of low pressure transition, in oil cylinder, compressed hydraulic oil can produce resilience, this can cause, and oil pump damages, the life-span reduces even affects the stable of hydraulic system.Although the mode of the common overflow valve of access adopting has at present solved pressure release problem.But not only cause that because common overflow valve flowed friction is large, adaptation flow is less under oil temperature rising, hydraulic oil viscosity, degradation problem is serious, and pressure release is slow, has reduced injection moulding efficiency and injection moulding precision.
Summary of the invention
For overcoming the deficiency of above-mentioned existence, the invention provides a kind of fast hydraulic pressure control device of hydraulic injection molding machine, with the direction valve of the guarantee injection machine of the mode of inserted valve, quick response and the high control precision of relief valve, injection machine production efficiency and product quality are all 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 modes, driver is connected with servomotor by line of codes, servo motor driven oil pump running, and pressure fuel pump installation of sensors exports at oil pump, oil pump entrance is connected with filter, and filter below is provided with fuel tank; Unidirectional inserted valve valve port A is connected to oil 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 is connected with fuel tank; The valve port at two position two-way valve and two ends after pilot pressure governor parallel connection 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, the valve port A of direction inserted valve is connected with return cavity valve port with the propelling valve port of oil cylinder respectively with B, and the piston rod of oil cylinder is coaxially connected with screw in injection molding machine.
Described direction inserted valve comprises 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 forms the valve port P of direction inserted valve, and is connected with the valve port P of guide's three-position four-way valve, the valve port T access fuel tank of guide's three-position four-way valve, the valve port B of second direction valve pick-and-place components is connected with the valve port A of first direction valve pick-and-place components and forms the valve port A of direction inserted valve, the valve port B of third direction valve pick-and-place components is connected with the valve port A of fourth direction valve pick-and-place components and forms the valve port B of direction inserted valve, after communicating with the X chamber of third direction valve pick-and-place components, 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 fourth 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, 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 are exported respectively pressure fuel pump signal and oil cylinder working-pressure signal.
Described two position two-way valve and guide's three-position four-way valve be the switching of reception control signal control valve respectively.
Described pilot pressure governor is by regulating inner spring to regulate the pressure in oil circuit.
In the time of 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 closes to make hydraulic oil not return to oil pump, and hydraulic oil enters fuel tank, completes pressure release; In the time of oil circuit hypertonia, pilot pressure governor overflow, pressure valve pick-and-place components is opened, unidirectional inserted valve closes to make hydraulic oil not return to oil pump, and hydraulic oil enters fuel tank, until oil circuit pressure drop after safety value, pilot pressure governor is closed, and pressure valve pick-and-place components is closed.
As valve port A, the valve port P of guide's three-position four-way valve, while all communicating with valve port B, the piston rod position of oil cylinder remains unchanged, thereby fixing screw in injection molding machine makes injection machine carry out pressurize operation; When the valve port A of guide's three-position four-way valve communicates with valve port P, and valve port P is while communicating with valve port T, and the piston rod of oil cylinder outwards moves, thereby promotes screw in injection molding machine, makes injection machine carry out injection moulding action; When the valve port A of guide's three-position four-way valve communicates with valve port T, and valve port P is while communicating with valve port B, and the piston rod of oil cylinder moves inward, thereby drives screw in injection molding machine rollback.
Beneficial effect of the present invention is:
The invention enables injection machine in the time of different operating phase transition, without motor, oil pump reversion pressure release stably, ensured motor, the long-life of oil pump, steady operation; Inserted valve liquid damping power is little, and oil temperature does not raise, and pressure release inserted valve has relief function, can carry out pressure overload protection, has ensured that hydraulic system works normally.
The syndeton of pressure release inserted valve of the present invention and direction inserted valve not only meets large flow rate working conditions but also fast response time, control accuracy is high, has ensured that injection moulding completes the conversion in different operating stage fast, has improved production efficiency and the Product Precision of injection machine.
Brief description of the drawings
Fig. 1 is 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 drawings and the specific embodiments, the present invention is described in further detail.
As shown in Figure 1, the present invention includes and comprise 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 modes, driver 1 is connected with servomotor 2 by line of codes, and servomotor 2 drives oil pump 3 to turn round, and pressure fuel pump sensor 5 is arranged on oil pump 3 and exports, oil pump 3 entrances are connected with filter 4, and filter 4 belows are provided with fuel tank; Unidirectional inserted valve 6 valve port A are connected to oil pump 3 and export, 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 are connected with fuel tank; After two position two-way valve 8 is in parallel with pilot pressure governor 9, 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, the valve port A of direction inserted valve is connected with return cavity valve port with the propelling valve port of oil cylinder 16 respectively with B, and the piston rod of oil cylinder 16 is coaxially connected with screw in injection molding machine.
As shown in Figure 1, above-mentioned direction inserted valve specifically comprises 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 forms 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, the valve port T access fuel tank of guide's three-position four-way valve 15, the valve port B of second direction valve pick-and-place components 12 is connected with the valve port A of first direction valve pick-and-place components 11 and forms the valve port A of direction inserted valve, the valve port B of third direction valve pick-and-place components 13 is connected with the valve port A of fourth direction valve pick-and-place components 14 and forms the valve port B of direction inserted valve, after communicating with the X chamber of third direction valve pick-and-place components 13, 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 fourth direction valve pick-and-place components 14, second direction valve pick-and-place components 12 is connected with the valve port B of guide's three-position four-way valve 15, 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 are exported respectively pressure fuel pump signal and oil cylinder working-pressure signal.
Two position two-way valve 8 and guide's three-position four-way valve 15 switching of reception control signal control valve respectively.
Pilot pressure governor 9, by regulating inner spring to regulate the pressure in oil circuit, specifically regulates the pressure of the working connection being made up of the oil circuit between valve port B, the valve port A of pressure valve pick-and-place components 7 and the valve port P of direction inserted valve of unidirectional inserted valve 6.
As shown in Figure 1, in the time of oil circuit pressure release, two position two-way valve 8 spools are closed, and pressure valve pick-and-place components 7 is opened, and unidirectional inserted valve 6 closes to make hydraulic oil not return to oil pump, and hydraulic oil enters the fuel tank being connected on pilot pressure governor 9, completes pressure release; In the time of oil circuit hypertonia, pilot pressure governor 9 overflows, pressure valve pick-and-place components 7 is opened, unidirectional inserted valve 6 closes to make hydraulic oil not return to oil pump, hydraulic oil enters the fuel tank being connected on pilot pressure governor 9,, after safety value pilot pressure governor 9 is closed until oil circuit pressure drop, pressure valve pick-and-place components 7 is closed.
When by the spool of mobile guide's three-position four-way valve 15, make valve port A, the valve port P of guide's three-position four-way valve 15, while all communicating with valve port B, the piston rod position of oil cylinder 16 remains unchanged, thereby fixes screw in injection molding machine, makes injection machine carry out pressurize operation;
When passing through the spool of mobile guide's three-position four-way valve 15, the valve port A of guide's three-position four-way valve 15 is communicated with valve port P, and valve port P is while communicating with valve port T, the piston rod of oil cylinder 16 is mobile acting outwards, thereby promotion screw in injection molding machine, makes injection machine carry out injection moulding action;
When by the spool of mobile guide's three-position four-way valve 15, the valve port A of guide's three-position four-way valve 15 is communicated with valve port T, and valve port P is while communicating with valve port B, the piston rod of oil cylinder 16 moves inward compression, thus drive screw in injection molding machine rollback.
The fuel tank being connected in the present invention 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 can be same fuel tank, also can be different fuel tanks, preferably same fuel tank.
As shown in Figure 1, the specific embodiment of the invention course of work:
The X chamber of unidirectional inserted valve 6 communicates with valve port B, has unidirectional control function.In the time that 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 by valve port A, flows out from valve port B; In the time that system is carried out Overload Protection or pressure release, hydraulic oil enters unidirectional inserted valve 6 by valve port B, because X chamber communicates with valve port B, pressure is larger, and unidirectional inserted valve 6 is closed.
Because unidirectional inserted valve adopts cone valve type structure more, for the ball formula structure of traditional check valve, internal leakage is very little, without stuck phenomenon.
Two position two-way valve 8 is general in closed state, the Maximum safe pressure of adjustable pilot pressure governor 9 oil pressure relief values and then control system, when system pressure exceedes safe pressure, fuel tank is connected in pilot pressure governor 9 overflows, 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 enters 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 decreased predetermined value, pilot pressure governor 9 stops overflow, completes pressure overload protection;
When complete injection phase that pressure is higher as injection stage after, the data of feeding back according to pressure sensor 10, to two position two-way valve control start signal, the X chamber of pressure valve pick-and-place components 7 and fuel tank are connected, pressure decreased, 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.The data system pressure decreased feeding back according to oil cylinder working-pressure sensor 10 is after predetermined value, and to two position two-way valve control shutdown signal, pressure valve pick-and-place components 7 is closed, and completes pressure release.
Pressure valve pick-and-place components adopts cone valve type structure, cuts off and sealing oil circuit by the conical surface, and spool only need move less stroke, and oil circuit can be realized break-make conversion, is active in one's movements, and is specially adapted to the occasion of opening at a high speed.
Guide's three-position four-way valve 15 and four direction valve pick-and-place components form direction inserted valve.As shown in Figure 1, when the spool of guide's three-position four-way valve 15 is during in centre, the X chamber of four direction pick-and-place components and the valve port P of direction inserted valve are that working connection communicates, and four direction pick-and-place components is closed, and oil cylinder 16 keeps closed at both ends, keeps injection screw position motionless;
In the time injecting, give the 1YA power on signal of guide's three-position four-way valve 15, spool left, as shown in Figure 1.Now, the X chamber of first direction valve pick-and-place components 11 and third direction valve pick-and-place components 13 and the valve port A of guide's three-position four-way valve 15 communicate, the valve port A of guide's three-position four-way valve and the valve port P of guide's three-position four-way valve connect, and the valve port P of guide's three-position four-way valve 15 and the valve port P of direction inserted valve are that working connection communicates.The X chamber of second direction valve pick-and-place components 12 and fourth direction valve pick-and-place components 14 and the valve port B of guide's three-position four-way valve 15 connect, and valve port B and valve port T connect, access 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, enter the propelling valve port of oil cylinder 16, i.e. left chamber in Fig. 1, the hydraulic oil in oil cylinder 16 return cavities enters the valve port A of fourth direction valve pick-and-place components 14, the valve port B that goes out fourth direction valve pick-and-place components 14 enters fuel tank, and oil cylinder 16 completes injection moulding action.
In the time that the piston rod of oil cylinder is return, give the 2YA power on signal of guide's three-position four-way valve 15, spool is to the right.The valve port A of guide's three-position four-way valve 15 and T and valve port B and P 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 the left chamber of oil cylinder 16 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 be return.
Because direction controlling function and the pipeline circulating function of direction inserted valve are born 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 large, thereby flow damping is little, negotiability is large, is specially adapted to the occasion of large flow.
The pressure data feeding back according to pressure fuel pump sensor 5, servomechanism control signal control driver 1, driver 1 is controlled servomotor 2, and servomotor 2 drives oil pump 3 with suitable speed running, ensures injection moulding process stability of flow, pressure balance.
Above-mentioned detailed description of the invention is used for the present invention that explains, instead of limits the invention, and in the protection domain of spirit of the present invention and claim, any amendment and change that the present invention is made, all fall into protection scope of the present invention.

Claims (7)

1. a fast hydraulic pressure control device for hydraulic injection molding machine, is characterized in that: comprise 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 modes, driver (1) is connected with servomotor (2) by line of codes, servomotor (2) drives oil pump (3) running, pressure fuel pump sensor (5) is arranged on oil pump (3) outlet, oil pump (3) entrance is connected with filter (4), and filter (4) below 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 is connected with fuel tank; After two position two-way valve (8) is in parallel with pilot pressure governor (9), 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), the valve port A of direction inserted valve is connected with return cavity valve port with the propelling valve port of oil cylinder (16) respectively with B, and the piston rod of oil cylinder (16) is coaxially connected with screw in injection molding machine.
2. the fast hydraulic pressure control device of a kind of hydraulic injection molding machine according to claim 1, is characterized in that: described direction inserted valve comprises 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 forms 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 access fuel tank of guide's three-position four-way valve (15), the valve port B of second direction valve pick-and-place components (12) is connected with the valve port A of first direction valve pick-and-place components (11) and forms the valve port A of direction inserted valve, the valve port B of third direction valve pick-and-place components (13) is connected with the valve port A of fourth direction valve pick-and-place components (14) and forms the valve port B of direction inserted valve, after communicating with the X chamber of third direction valve pick-and-place components (13), 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 fourth direction valve pick-and-place components (14), second direction valve pick-and-place components (12) is connected with the valve port B of guide's three-position four-way valve (15), 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.
3. the fast hydraulic pressure control device of a kind of hydraulic injection molding machine according to claim 1, is characterized in that: described pressure fuel pump sensor (5) and oil cylinder working-pressure sensor (10) are exported respectively pressure fuel pump signal and oil cylinder working-pressure signal.
4. the fast hydraulic pressure control device of a kind of hydraulic injection molding machine according to claim 1, is characterized in that: described two position two-way valve (8) and guide's three-position four-way valve (15) switching of reception control signal control valve respectively.
5. the fast hydraulic pressure control device of a kind of hydraulic injection molding machine according to claim 1, is characterized in that: described pilot pressure governor (9) is by regulating inner spring to regulate the pressure in oil circuit.
6. the fast hydraulic pressure control device of a kind of hydraulic injection molding machine according to claim 1, it is characterized in that: in the time of 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) closes to make hydraulic oil not return to oil pump, hydraulic oil enters fuel tank, completes pressure release; In the time of oil circuit hypertonia, pilot pressure governor (9) overflow, pressure valve pick-and-place components (7) is opened, unidirectional inserted valve (6) closes to make hydraulic oil not return to oil pump, hydraulic oil enters fuel tank,, after safety value pilot pressure governor (9) is closed until oil circuit pressure drop, pressure valve pick-and-place components (7) is closed.
7. the fast hydraulic pressure control device of a kind of hydraulic injection molding machine according to claim 1, it is characterized in that: as valve port A, the valve port P of guide's three-position four-way valve (15), while all communicating with valve port B, the piston rod position of oil cylinder (16) remains unchanged, thereby fixing screw in injection molding machine, makes injection machine carry out pressurize operation; When the valve port A of guide's three-position four-way valve (15) communicates with valve port P, and valve port P is while communicating with valve port T, and the piston rod of oil cylinder (16) outwards moves, thereby promotes screw in injection molding machine, makes injection machine carry out injection moulding action; When the valve port A of guide's three-position four-way valve (15) communicates with valve port T, and valve port P is while communicating with valve port B, and the piston rod of oil cylinder (16) moves inward, thereby drives screw in injection molding machine rollback.
CN201410378968.8A 2014-08-04 2014-08-04 The fast hydraulic pressure of hydraulic injection molding machine controls device Active CN104162967B (en)

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CN201410378968.8A CN104162967B (en) 2014-08-04 2014-08-04 The fast hydraulic pressure of hydraulic injection molding machine controls device

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CN104162967B CN104162967B (en) 2016-08-17

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CN105508324A (en) * 2015-09-17 2016-04-20 浙江大学宁波理工学院 Hydraulic vibration type high-power wave generation system and control method thereof
CN105856524A (en) * 2016-05-13 2016-08-17 芜湖虹飞机械有限公司 Mold with automatic flow speed correcting function
CN111059101A (en) * 2019-11-07 2020-04-24 中冶宝钢技术服务有限公司 Big arm oil cylinder control valve group
CN111941771A (en) * 2020-08-10 2020-11-17 周飞 Large two-plate machine mode locking oil cylinder control system and control method

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CN101948740A (en) * 2010-09-10 2011-01-19 中国科学院过程工程研究所 Small-fall open pond for massively cultivating microalgae as well as use method and application thereof
CN102001168A (en) * 2010-09-08 2011-04-06 宁波伊士通控制技术有限公司 Novel hydraulic servo pressure-relief mode control system
CN203994599U (en) * 2014-08-04 2014-12-10 浙江大学 A kind of fast hydraulic pressure control device of hydraulic injection molding machine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105508324A (en) * 2015-09-17 2016-04-20 浙江大学宁波理工学院 Hydraulic vibration type high-power wave generation system and control method thereof
CN105856524A (en) * 2016-05-13 2016-08-17 芜湖虹飞机械有限公司 Mold with automatic flow speed correcting function
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
CN111059101A (en) * 2019-11-07 2020-04-24 中冶宝钢技术服务有限公司 Big arm oil cylinder control valve group
CN111941771A (en) * 2020-08-10 2020-11-17 周飞 Large two-plate machine mode locking oil cylinder control system and control method

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