CN104708786B - Molding apparatus and method for controlling molding apparatus - Google Patents
Molding apparatus and method for controlling molding apparatus Download PDFInfo
- Publication number
- CN104708786B CN104708786B CN201410779335.8A CN201410779335A CN104708786B CN 104708786 B CN104708786 B CN 104708786B CN 201410779335 A CN201410779335 A CN 201410779335A CN 104708786 B CN104708786 B CN 104708786B
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- Prior art keywords
- pump
- work
- revolution
- building mortion
- working oil
- Prior art date
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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
- B29C45/76—Measuring, controlling or regulating
- B29C45/82—Hydraulic or pneumatic circuits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
- B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
-
- 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
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/68—Mould opening, closing or clamping devices hydro-mechanical
-
- 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
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
Abstract
The invention provides a molding apparatus and a method for controlling the molding apparatus, which can use a pump driven by a servo motor or a motor controlled by an inverter, realize energy saving, and improve the response and controllability of a hydraulic cylinder during operation. A molding device (11) performs at least a part of the operations of a mechanism (18) by delivering hydraulic oil delivered from a pump (28) to a hydraulic cylinder (19), and is provided with: a pump (28) driven by a servo motor or a motor (30) controlled by an inverter; and a control device (39) which stops the operation of the pump (28) for a certain time in a molding cycle, and sets the rotation number of the pump (28) to a standby rotation number (r1) if the operation of the pump (28) is started before the hydraulic oil is started to be delivered to the hydraulic cylinder (19) and a predetermined set condition (p1) is reached.
Description
Technical field
The present invention relates to the working oil by will be conveyed from pump to hydraulic cylinder conveying come carry out at least a portion action into
Shape dress put and building mortion control method.
Background technology
In the past, the shaping of at least a portion action was carried out to hydraulic cylinder conveying as the working oil by will be conveyed from pump
Device, as the building mortion of representative, enumerates injection moulding machine, with multiple.Especially recently as Patent Document 1, utilize
The pump that servo motor etc. controls revolution and driven is also used for injection moulding machine.Also described by controlling pump in patent document 1
The angle of swash plate controls the pressure of hydraulic cylinder.But, patent document 1 stops pump, and pump is always acted, it is impossible to help
In larger energy-saving.
Patent document 2, which is described, stops the pump being operated by servo motor.In addition, patent document 2 is also described
The controlling of low-speed region is improved by using the small-sized auxiliary pump control flow and pressure by servo motor driven.But
It is that patent document 2 is not recorded when the pump of stopping is operated again, and also existing makes pump reach regulation when being operated again
Pressure and flow spend the time, the occasion of problems in terms of the responsiveness or controlling of hydraulic cylinder.
In addition, patent document 3, which is described, especially makes erecting in advance for vane pump.But, patent document 3 needs to be used in pump
Between set control pressure supply line, other pumps is always rotated, from other pumps to vane pump supply control pressure structure.Separately
Outside, when hydraulic cylinder is started working, because the work with hydraulic cylinder starts while making pump be acted from halted state, therefore, no
It is the mode favourable to being quickly obtained the delivery flow of pump.
Prior art literature
Patent document 1：Japanese Unexamined Patent Publication 2011-93139 publications (scheme 1,0007, Fig. 1)
Patent document 2：Japanese Unexamined Patent Publication 11-19997 publications (scheme 1,0033, Fig. 1)
Patent document 3：Japanese Unexamined Patent Publication 2001-193706 publications (scheme 1,0018, Fig. 1, Fig. 5)
As described above, in existing building mortion, when not making pump stoppingly persistently be operated, it is impossible to realize abundant
Energy-saving, also, when wanting to make pump to stop and be operated again, to reach as defined in pressure and flow spend the time,
The problem of there is responsiveness or controlling situation of problems of hydraulic cylinder etc.Also it is used to shorten pump arrival rule in the presence of progress
Fixed pressure and the effort of the time of flow, but it is complicated, asked with existing in terms of the responsiveness or controlling of hydraulic cylinder
The occasion of topic.
The content of the invention
Therefore, in the present invention, its object is to provide to use by servo motor or be transformed the motor of device control
The pump of driving, realizes energy-saving, and responsiveness when can improve the work of hydraulic cylinder, the building mortion of controlling and into shape dress
The control method put.Even if in addition, its object is to provide to use by servo motor or be transformed the motor drive of device control
Response when pump simple in construction and less expensive is also used in dynamic pump, energy-saving is realized, and improving the work of hydraulic cylinder
The control method of property, the building mortion of controlling and building mortion.
The building mortion that the solution of the present invention one is recorded is carried out by the working oil that will be conveyed from pump to hydraulic cylinder conveying
At least one of work, the building mortion is characterised by possessing：Pump, it is by servo motor or is transformed the horse that device is controlled
Up to driving；And control device, it makes the work of said pump stop certain time in a forming period, also, if from opening
Begin to start to impose a condition as defined in the work and arrival of said pump to before hydraulic cylinder transportation work oil, then the revolution for making said pump is
Standby revolution.
The building mortion that the solution of the present invention two is recorded is characterised by that in scheme one, said pump is vane pump, is possessed
Located at above-mentioned vane pump or it is connected on the pipeline of above-mentioned vane pump, and detects the hydraulic sensing of the discharge pressure of above-mentioned vane pump
Device.
The control method for the building mortion that the solution of the present invention three is recorded carries out at least one by the working oil conveyed from pump
Partial work, the control method of the building mortion is characterised by, provided with by servo motor or being transformed the servo of device control
The pump of motor driving, makes the work of pump stop certain time in a forming period, also, if is conveyed from beginning to hydraulic cylinder
Start the work of pump before working oil, and imposed a condition as defined in arrival, then the revolution for making pump is standby revolution.
The control method for the building mortion that the solution of the present invention four is recorded is characterised by, in scheme three, is started above-mentioned
The opportunity of the work of pump is imposed a condition as defined in the detected value arrival of the sensor of opportunity set in advance or injection moulding machine
Opportunity at least one party.
The effect of the present invention is as follows.
The building mortion of the present invention is at least one of to carry out to hydraulic cylinder conveying by the working oil that will be conveyed from pump
Work, possesses：Pump, it is by servo motor or is transformed the motor driving that device is controlled；And control device, it is in a forming period
The work of said pump is stopped certain time, also, if since starting to before hydraulic cylinder transportation work oil said pump
Act and impose a condition as defined in reaching, then the revolution for making said pump is standby revolution, accordingly, it is capable to realize energy-saving and improve liquid
Responsiveness both sides during the action of cylinder pressure.In addition, the control method of the building mortion of the present invention also has effect same as described above
Really.
Brief description of the drawings
Fig. 1 is the skeleton diagram of the injection moulding machine of present embodiment.
Fig. 2 is the figure of the method for controlling rotation of the pump for the injection moulding machine for representing present embodiment.
Fig. 3 is the figure of the method for controlling rotation of the pump for the injection moulding machine for representing another embodiment.
In figure：11-injection moulding machine (building mortion), 12-mold closing mechanism, 13-injection device, 19-closing cylinder (liquid
Cylinder pressure), 27,28-pump, 23,29,30,38,42,50-servo motor, 39-control device, 47-hydrostatic sensor, t1-
Defined opportunity, p1-defined setting pressure (defined to impose a condition), r1-defined standby revolution (standby revolution).
Embodiment
According to Fig. 1, illustrate to carry out the work of a part to hydraulic cylinder conveying as the working oil by will convey from pump
Building mortion present embodiment hybrid injection moulding machine 11.Injection moulding machine 11 possesses mold closing mechanism 12 and filled with injection
Put 13.First, mold closing mechanism 12 is illustrated, the consolidating provided with the fixed metal die 15 of installation on pedestal 14 of mold closing mechanism 12
Price fixing 16 and the movable plate 18 for installing movable metal die 17.In the present embodiment, as the conjunction for carrying out metal die 15,17
The clamping of mould, provided with the closing cylinder 19 as hydraulic cylinder for using the working oil from pump 27,28 both sides conveying to be operated.
Closing cylinder 19 is respectively equipped near the corner of fixed disk 16, the bar of closing cylinder 19 is joining beam 20, is inserted respectively to movable plate 18
Corner near.In addition, being circumferentially formed thereon groove on joining beam 20.In addition, the joining beam 20 at the back side of movable plate 18 is inserted
Part around be respectively equipped with above-mentioned groove coordinate halfnut 21.The drive mechanism of halfnut 21 can be hydraulic pressure
Cylinder, can also mechanically directly be driven by electro-motor.In addition, closing cylinder 19 can be located near the corner of movable plate 18,
Can be located at set in addition by between platen and movable plate or movable plate interlock matched moulds disk and movable plate between etc..Separately
Outside, closing cylinder 19 can drive elbow-bar mechanism.
In addition, on mold closing mechanism 12, being provided with along fixed disk 16 and movable plate 18 makes movable plate 18 relative to fixed disk 16
Mobile mould switching mechanism 22.Mould opening and closing servo motor 23 is fixed on fixed disk 16 by mould switching mechanism 22, relative to servo
The drive shaft of motor 23, ball-screw 24 is connected by shaft coupling (not shown) etc..Ball-screw 24 utilizes and is installed on fixed disk
The bearing rotary of 16 bracket etc. is installed freely.In addition, fixing ball-screw nut 25, ball wire in the side of movable plate 18
Thick stick nut 25 is inserted by above-mentioned ball-screw 24.Also, ball-screw 24 is rotated by using the driving of servo motor 23, is wrapped
Including the movable plate 18 of ball-screw nut 25 can move in mould opening and closing direction (left and right directions in Fig. 1).In addition, mould switching mechanism
22 can be the other structures using electro-motor, can also use mould opening and closing hydraulic cylinder.
In addition, be provided with the back side of movable plate 18 be used to making to be stripped in the state of movable metal die 17 is pasted on into
The ejecting mechanism 26 that shape product P is protruded.In the present embodiment, ejecting mechanism 26 is driven by ejection servo motor 50, but also may be used
To be other structures, hydraulic cylinder can be used.
Then, the injection device 13 of the injection moulding machine 11 of present embodiment is illustrated.Injection device 13 provided with
The front of the cartridge heater 34 of heater is provided with nozzle 35, and Shell Plate 36 is provided near the rear portion of cartridge heater 34.In addition, adding
The endoporus of hot cylinder 34 can rotate and can configure screw rod 37 movably forward and backward.The injection mechanism 32 of the injection device 13 of present embodiment
Driven respectively by injection servo motor 38 with metering servo motor 42 with metrological service 33.But, the note of injection device 13
Injection hydraulic cylinder can be used by penetrating mechanism 32, and metrological service 33 can use hydraulic motor.In addition, before Shell Plate 36
Provided with for making the injection device 13 on bed 14 integrally to the movement of the side of mold closing mechanism 12, and nozzle 35 is pressed against into fixed metal pattern
The injection device of the nozzle contact surface of tool 15 moves forward and backward mechanism 43 (travel mechanism).In the present embodiment, before injection device
Travel mechanism 43 is made up of hydraulic cylinder (movable cylinder 44) afterwards, and the cylinder portion of movable cylinder 44 is installed on Shell Plate 36, and bar is installed on fixation
Disk 16.
In addition, in injection moulding machine 11, in addition to Fig. 1 is recorded, provided with multiple liquid such as metal die core actions
Cylinder pressure, the working oil for being utilized respectively at least one party from pump 27,28 is acted.In addition, the injection moulding machine 11 of the present invention
(building mortion) carries out at least one of action, whole mechanisms by the way that the working oil conveyed from pump is conveyed to hydraulic cylinder
Action carried out by hydraulic pressure.
Then, the hydraulic mechanism of present embodiment is illustrated.The pump 27,28 of the hydraulic mechanism of present embodiment is distinguished
The pump driven using the servo motor 29,30 of the revolution by energy controlling pump.Pump 27 is connected to case 45, also, also to closing cylinder 19
Or the control line (not shown) supply working oil of movable cylinder 44, hydraulic circuit 31.Therefore, pump 27 during a forming period always
Rotation.In the present embodiment, pump 27 uses the axial poiston pump as variable delivery pump, need not supply working oil or confession
During to very small amount working oil, by adjusting the angle of swash plate, it is 0 or few that can make the discharge rate of pump.The drive motor of pump 27
Use in the example in fig 1 and the servo motor 29 of revolution is controlled but it is also possible to be the energy by convertor controls by control device 39
Control revolution motor or other can not control the motor of revolution.
Pump 28 is the pump for supplying working oil when closing cylinder 19 works by hydraulic circuit.Pump 28 is connected to case 45, also,
The hydrostatic sensor 47 of the pressure for the working oil discharged on the pipeline 46 for be connected to discharge side provided with detection from pump 28.In addition,
Hydrostatic sensor 47 can be directly arranged in pump 28.In addition, being leaned on than the check valve 48 located at above-mentioned pipeline 46 from pump side branch
Pipe side is provided with safety valve 49.Safety valve 49 is contemplated to be the safety valve that can changeably control to set pressure.Pump 28 is at least to matched moulds
Cylinder 19 supplies working oil, but it is also possible to supply working oil to other hydraulic cylinders.
In the present embodiment, the species of pump 28 uses fixed discharge formula vane pump.As shown in Fig. 5 of patent document 3, leaf
Piece pump is that the pump 28 of working oil is discharged by being rotated from the prominent blade of central shaft (rotor), and the drive shaft of servo motor 30 connects
Tie the central shaft (rotor) in pump.Fixed discharge formula vane pump is relatively simple for structure, and it is also easy to repair, and price is relatively cheap.But
It is that vane pump records such such as (0019) section of patent document 3, exists since the rotation of pump 28 until blade is reliably in
The cost time protruding outside of heart axle (rotor), the discharge rate of every revolution reaches the problem of setting spends the time.
In addition, pump 28 used in the present invention is not defined in fixed discharge formula vane pump or variable discharge formula leaf
The other kinds of pump such as piece pump, axial poiston pump and gear pump.In the case of axial poiston pump, by controlling swash plate
Angle, also can the discharge rate that turns around of controlling pump, but price is higher.In the case of fixed discharge formula gear pump, structure ratio
Relatively simple, it is also easy to repair, and price is also relatively cheap.Controlled to turn by control device 39 in addition, the drive motor of pump 28 is used
Several servo motors 30, then can be the motor being controlled by converter but as long as being that can control the motor of revolution.In addition,
Provided with reducing gears such as reductors between motor and pump.
For the quantity of the pump 27,28 of injection moulding machine 11, in Fig. 1, record respectively one (amounting to two), but
One pump 28 can be only set, the pump of more than three altogether can also be used.Especially in large-scale injection moulding machine 11, one
It can be two or more to stop the pump 28 of certain time in forming period.In addition, in Fig. 1, recording and utilizing a servo motor
30 make the pump that a pump 28 is operated, but it is also possible to make the pump of two, three or more than four using a servo motor 30
Simultaneously rotation two connect, three connect, four even etc. pump.In the company of use two, three even or in the case of the pump of four company's above, as long as any
Individual pump discharges setting hydrostatic sensor on the pipeline of working oil from pump.It can be conveyed in addition, pump can be used to reverse
The twocouese pump of working oil.
To the detailed description will be omitted of hydraulic circuit 31, but possess the boxlike valve switched over when making closing cylinder 19 work, use
In the switching control of above-mentioned boxlike valve control pipe and for by control pipe to solenoid switching valve of boxlike valve oil transportation etc..Separately
Outside, according to the control needs of injection moulding machine 11, provided with the flow control valve for carrying out speed control, for carrying out pressure control
A variety of valves such as the pressure-control valve of system or hydrostatic sensor.In addition, the solenoid or hydrostatic sensor of above-mentioned valve are connected to control
Device 39.
In the present embodiment, control device 39 includes the controller for carrying out the sequence control of hydraulic circuit 31 with being watched
Take servopump of drive control of motor 23,29,30,38,42,50 etc..In addition, control device 39 have preserve molding condition or
The storage part 40 of setting value, is also attached to be formed the setting display picture 41 of setting and the display of condition etc..
In addition, in the case where the present invention is used for into injection moulding machine, the quantity of injection device not being limited or disk is installed on
Metal die quantity.Furthermore it is possible to be that rotating disk is revolvably located at the disk of mold closing mechanism and installs gold on the rotating pan
Category mould or the knot that the disk rotated centered on the axle of vertical direction or metal die are set between fixed disk and movable plate
Structure.In addition, mold closing mechanism can carry out matched moulds in the vertical.In addition, injection moulding machine can carry out ejection compress moulding.
Then, the control method of the injection moulding machine 11 of present embodiment is illustrated.Fig. 2 is that transverse axis (x-axis) represents to be molded into
Portion of time, the longitudinal axis (y-axis) in one forming period of type machine 11 represent the inspection of the working oil detected by hydrostatic sensor 47
The chart of the revolution of servo motor 30 of the measuring pressure with carrying out rotation driving to pump 28.Fig. 2 is not recorded, but movable cylinder 44 is universal total
It is to be contacted with the fixed nozzle of metal die 15, in addition, the control pipe (not shown) of hydraulic circuit 31 is always remained due to needing
Authorized pressure, therefore pump 27 always rotates.On the other hand, pump 28 is used for closing cylinder 19, therefore, make in a forming period
The control carried out by control device 39 stops certain time (here, for mould opening/closing time, cool time (Dose times), taking out
Time etc.).The action of pump 28 is set to stop being to cut down electric power consumption.
When the servo motor 23 using mould switching mechanism moves movable plate 18, accelerate to behind assigned position and move at a high speed
It is dynamic, slow down again from assigned position, movable plate 18 stops at mold closed position.Also, when the locking end for confirming halfnut 21
When, closing cylinder 19 is acted, and starts matched moulds.Working oil is to the conveying of closing cylinder 19 by closing the working oil of pump 27 and pump 28
Stream is conveyed.Now, in the present invention, for the responsiveness of the action that improves closing cylinder 19, make again from start working oil to
The pump 28 stopped before the conveying of closing cylinder 19 is acted.
In the present embodiment, reduced speed now in the movement of movable plate 18 using mould switching mechanism 22 from high-speed mobile
Opportunity t1 (predetermined opportunity) starts the work of pump 28.Now, in the way of the revolution of pump 28 rises to revolution set in advance
The closed-loop control of the revolution of servo motor 30 is carried out using control device 39.Also, from pump 28 discharge working oil pressure by
Hydrostatic sensor 47 is detected, is being detected to turn into the time point t2 of defined setting pressure p 1 (defined to impose a condition), is being judged as
The blade of pump 28 is protruded, and working oil can be discharged normally, and the setting revolution of servo motor 30 is dropped to regulation by control device 39
Standby revolution r1 (standby revolution).
The defined standby revolution r1 of pump 28 now is in the state for keeping the blade of temporarily prominent pump 28 to protrude, discharge
Working oil as pulsation etc. be unstable range set.In the case where presetting above-mentioned defined standby revolution r1,
This is not defined in, but is desired for 100min as one-1~400min-1.In addition, defined standby revolution r1 is used as a phase
Hope and be set as 5%~30% of the rated revolution as pump 28.Even if the standby revolution of pump 28 exceedes above-mentioned value, in mold closing mechanism
Also have no problem, but be not preferred from the viewpoint of energy-conservation in terms of the responsiveness that 19 work starts.
In addition, in the present embodiment, movable plate 18 movement since the opportunity t1 that high-speed mobile reduces speed now pump
28 work, but as long as being the detected value of the sensor of opportunity set in advance or injection moulding machine or the sensing of injection moulding machine
At least one party imposed a condition as defined in the detected value arrival of device.More specifically, the opportunity for starting the work of pump 28 can
During being the control switching of sequence control or from during control switching with the opportunity set in advance such as the opportunity of timer timing.Separately
Outside, start pump 28 work opportunity can be the grade of hydrostatic sensor 47 hydraulic pressure detected value or movable plate 18 position inspection
The sensors such as the value of measured value (detected value of the encoder of servo motor 23), the value of the sensor of other injection moulding machines or pump
When being imposed a condition as defined in detected value arrival.Also, the action of especially closing cylinder 19 start before pump 28 action start when
Machine can be when reducing speed now to the opportunity the time point of double locking end for opening nut 21 from the action of mould switching mechanism 22
T1 starts the work of pump 28.Even if in addition, being used to switch to defined standby revolution r1's defined after the work of beginning pump 28
Impose a condition, can also according to the values of other hydrostatic sensors, pump revolution (by turning that the encoder of servo motor 30 is detected
Number), the current value of servo motor 30 or torque, servo motor start a variety of conditions such as postrotational time and change into standby revolution
r1。
Even if in addition, standby revolution r1, the feelings of closed-loop control are being carried out from control device 39 to the revolution of servo motor 30
, can be with for example latter half of rising in regulation amplitude from initially to finally may not only keep certain standby revolution under condition
Mode changes standby revolution.Furthermore it is possible to closed-loop control is carried out in the way of the detected value of hydrostatic sensor 47 turns into setting value,
Finally remain standby revolution r1.Furthermore it is possible to which the pump 28 rotated can be kept to the defined electricity of the state of blade protrusion
Flow valuve is transported to motor and rotates pump 28 with standby revolution r1.In the case of two examples of the latter, control device 39 is not
Set standby revolution r1 setting value.
Due to from since the pump 28 rotation start with standby revolution r1 continue rotate during pump 28 discharge working oil not
It is too big flow, and pump 28 and closing cylinder 19 is not connected in the stage yet do not have place to go in hydraulic circuit 31, therefore from peace
Full valve 49 returns to case 45.Now, as long as the setting pressure of safety valve 49 is set as into defined low pressure, it becomes possible to reduce servo horse
Up to 30 and the load of pump 28, help to reduce consumption electric power.In addition, in structure of the hydraulic circuit 31 provided with accumulator, can
Pressure accumulation is carried out to the working oil discharged from pump 28, energy efficiency also becomes good.In addition, being also desirable that use using the structure of accumulator
The situation of a substantial amounts of working oil of pressure accumulation is needed when in injection moulding machine etc., in the boosting of closing cylinder 19.
Also, subsequent pass through the action (t3) that cooperation of halfnut 21 etc. starts closing cylinder 19.Now, switching is not schemed
Solenoid switching valve for the control pipe shown etc., boxlike valve etc. is acted using control pressure, the pipe to being connected to pump 27,28
The matched moulds side grease chamber in road and closing cylinder 19 is attached.At the same time, maximum revolution or rule are also risen to the revolution of pump 27,28
The mode of fixed setting revolution (high revolution) is controlled.In the present invention, until the opportunity t3 that the closing cylinder 19 works, pump 28
Rotated with defined revolution r1, after being connected to the pressure of the pipeline 46 of pump 28 for defined pressure, it is possible to increase pump 28 is increased
The responsiveness of closing cylinder 19 (hydraulic cylinder) during for maximum revolution or defined setting revolution, can shorten since work to liter
Press the time terminated.In addition, compared with the situation that the state stopped from pump 28 is hastily driven, because the load of pump 28 subtracts
It is few, therefore also there is the life of pump 28.
Also, at the end of closing cylinder 19 boosts, from injection device 13 to fixed metal die 15 and movable metal die
Injection fillers and pressurize are carried out in die cavity between 17, is next refrigerating work procedure (being measurement process in injection device side).On
If the supply of the working oil of the matched moulds side grease chamber to closing cylinder 19 during stating temporarily is boosted, leakage rate is only supplemented, therefore,
Stop the servo motor 30 of pump 28, only decline supply working oil from pump 27 according to the pressure of closing cylinder 19.
At the end of refrigerating work procedure, the working oil of the matched moulds side grease chamber of closing cylinder 19 temporarily frees up and eliminates pressure, connects down
Working oil is supplied from pump 27,28 to open side grease chamber to mould, is carried out using closing cylinder 19 with predetermined distance to movable metal die 17
The strength die sinking being stripped.It is identical before now also starting with matched moulds, start since starting to stop before transportation work is oily to closing cylinder 19
The work of pump 28 only.Specifically, the action that identical opportunity t1 starts pump 28 can started with eliminating pressure, can also
Opportunity t1 before and after it.Also, it is identical with Fig. 2, if imposing a condition p1 as defined in reaching, it regard the revolution of pump 28 as rule
Fixed standby revolution r1 waits machine t3 at the beginning of ensuing strength die sinking.Strength die sinking is by switching hydraulic circuit 31 not
The boxlike valve of diagram simultaneously makes pump 27,28 connect and start with the die sinking side grease chamber of closing cylinder 19, at the same time, with pump 27,28
Mode of the revolution also for maximum revolution or defined setting revolution (high revolution) is controlled.This series of certain basis of control
The instruction for carrying out self-control device 39 is carried out.
In addition, in above-mentioned present embodiment, pair start to supply working oil from pump 28 simultaneously with the work of closing cylinder 19
Example is recorded, but can be from a pump supply working oil and liquid for the control method of the building mortion of the present invention
During cylinder pressure has been acted, working oil is supplied to identical hydraulic cylinder since other pumps.Specifically, such as Fig. 3
Another embodiment injection moulding machine pump method of controlling rotation shown in, using hydraulic cylinder make mould switching mechanism carry out
Occasion of work etc., is the situation that desired speed is obtained using two or more pumps.In Fig. 3 (a), until regulation
Revolution s2 (be by servo motor encoder detection revolution, it is substantially uniform with flow), only from pump A to hydraulic cylinder supply work
Make oil, as the revolution s2 as defined pump, due to there was only pump A, underfed, therefore the equalization from pump A and pump B to hydraulic cylinder
Ground supplies working oil.In addition, in Fig. 3 (b), until the revolution s2 of defined pump, working oil is only supplied from pump A to hydraulic cylinder,
As the revolution S2 as defined pump, therefore only pump A, underfed, starts to supply 100% working oil from pump B, also root
Working oil is supplied from pump A to hydraulic cylinder according to speed.
In this case, setting value as defined in being reached in pump A revolution s2, also working oil is supplied from pump B to hydraulic cylinder
The opportunity t3 opportunity of switching (pump) drivings that start pump B structure in, existing can not obtain smooth as Fig. 3 (a), (b)
The rate of climb (controlling) situation.Therefore, as shown by dotted lines in figure 3, opened from the regulation opportunity t1 before the revolution s2 for reaching pump A
Beginning pump B rotation, makes pump B continuously rotate if the setting grade of pressure p 1 as defined in detecting with defined standby revolution r1.
In above-mentioned, for the regulation opportunity t1 for the rotation for beginning to pump B, it can start with pump A driving it is also possible to be pump A
It is front and rear that driving starts.
Another embodiment makes pump B revolution turn into regulation in pump B in the time point t2 for detecting the defined s1 that imposes a condition
Standby revolution r1 mode start control aspect, the working oil from pump B not as former state to hydraulic cylinder supply but by safety
It is identical with the control of the closing cylinder 19 of the embodiment before that valve returns to case this point.In addition, the above-mentioned conjunction to pump A and pump B
The example for flowing back to the speed control on road is illustrated, but passes through pressure, the field for afterwards collaborating pump B working oil as defined in detection
Close also identical.In addition, the quantity of the pump collaborated afterwards is not defined in two, can be more than three.
Illustrate, but need not be always supplied with small-sized injection moulding machine etc. in addition, being omitted as another embodiment
Working oil, supply when also without once in large quantities supply working oil injection moulding machine in the case of, can control to hydraulic pressure
The pump of the revolution of cylinder supply working oil can be one.In addition, in the case of another embodiment, work need not be being supplied
In the process of oil, said pump is also stopped the rotation, and hydraulic cylinder connects with pump and supplies working oil, is opened before being operated from hydraulic cylinder
The rotation of beginning pump.The order of pump control now is identical with present embodiment, therefore omits the description.
Industrial utilizability is as follows.
The present invention is not enumerated, but is not limited to above-mentioned embodiment, those skilled in the art are it is of course possible to root
It is changed according to the purport of the present invention.The present invention building mortion in addition to the injection moulding machine 11 including Die casting machine,
It can also be compression molding apparatuss, decompressor etc..In addition, the material shaped in building mortion is also in addition to resin, can
To be inorganic material such as metal, ceramics etc., it is not construed as limiting.
Claims (4)
1. a kind of building mortion, it passes through the working oil conveyed from multiple pumps is at least one of to carry out to hydraulic cylinder conveying
Work, the building mortion is characterised by,
Possesses control device, it makes by servo motor in a forming period or is transformed the motor of device control and drives and stop one
The work for the pump fixed time stops certain time, also, if above-mentioned since beginning is preceding at least to closing cylinder transportation work oil
Imposed a condition as defined in the work and arrival that pump is carried out again from halted state, then the revolution for making said pump is standby revolution.
2. building mortion according to claim 1, it is characterised in that
Said pump is vane pump,
Possess located at above-mentioned vane pump or be connected on the pipeline of above-mentioned vane pump, and detect the discharge pressure of above-mentioned vane pump
Hydrostatic sensor.
3. a kind of control method of building mortion, it carries out at least one of work by the working oil conveyed from multiple pumps,
The control method of the building mortion is characterised by,
Make in a forming period by servo motor or be transformed device control motor drive and stop certain time pump work
Make stopping certain time, also, if pump enters again from halted state since beginning is preceding at least to closing cylinder transportation work oil
Capable work, and imposed a condition as defined in arrival, then the revolution for making pump is standby revolution.
4. the control method of building mortion according to claim 3, it is characterised in that
The opportunity for starting the work of said pump is that the detected value of the sensor of opportunity set in advance or injection moulding machine reaches rule
At least one party on the fixed opportunity imposed a condition.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2013259149A JP5855080B2 (en) | 2013-12-16 | 2013-12-16 | Molding apparatus and method for controlling molding apparatus |
| JP2013-259149 | 2013-12-16 |
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| CN104708786A CN104708786A (en) | 2015-06-17 |
| CN104708786B true CN104708786B (en) | 2017-09-15 |
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| IT201700067908A1 (en) * | 2017-06-19 | 2018-12-19 | Italpresse Ind Spa | PRESSOCOLATA MACHINE WITH ENERGY SAVING ASSESSMENT SYSTEM |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201792465U (en) * | 2010-09-26 | 2011-04-13 | 深圳市奥宇控制系统有限公司 | Energy-saving control system for injection molding machine |
| CN102689427A (en) * | 2012-06-15 | 2012-09-26 | 成都市团结模具制造厂 | Energy-saving control system of injection molding machine and operating mode of energy-saving control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE4335403C1 (en) * | 1993-10-18 | 1994-12-15 | Karl Hehl | Hydraulic device |
| JP2003013907A (en) * | 2001-06-27 | 2003-01-15 | Yuichi Kiryu | Electro-hydraulic actuator for compression molding machine, injection molding machine or the like |
| JP4459757B2 (en) * | 2004-08-27 | 2010-04-28 | 住友重機械工業株式会社 | Plasticization moving device for electric injection molding machine |
| CN102935690B (en) * | 2012-05-17 | 2015-11-25 | 蔡少详 | Multifunctional plastic jetting-molding machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201792465U (en) * | 2010-09-26 | 2011-04-13 | 深圳市奥宇控制系统有限公司 | Energy-saving control system for injection molding machine |
| CN102689427A (en) * | 2012-06-15 | 2012-09-26 | 成都市团结模具制造厂 | Energy-saving control system of injection molding machine and operating mode of energy-saving control system |
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| JP2015112864A (en) | 2015-06-22 |
| CN104708786A (en) | 2015-06-17 |
| JP5855080B2 (en) | 2016-02-09 |
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Effective date of registration: 20200515 Address after: Tokyo, Japan Patentee after: THE JAPAN STEEL WORKS, Ltd. Address before: Aichi Prefecture, Japan Patentee before: KABUSHIKI KAISYA MEIKI SEISAKUSYO |