CN108361238A - Piston-cylinder unit and molding machine for molding machine - Google Patents

Piston-cylinder unit and molding machine for molding machine Download PDF

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Publication number
CN108361238A
CN108361238A CN201810077573.2A CN201810077573A CN108361238A CN 108361238 A CN108361238 A CN 108361238A CN 201810077573 A CN201810077573 A CN 201810077573A CN 108361238 A CN108361238 A CN 108361238A
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CN
China
Prior art keywords
piston
chamber
cylinder unit
accumulator
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201810077573.2A
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Chinese (zh)
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CN108361238B (en
Inventor
A·洛纳克尔
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Engel Austria GmbH
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Engel Austria GmbH
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Publication of CN108361238A publication Critical patent/CN108361238A/en
Application granted granted Critical
Publication of CN108361238B publication Critical patent/CN108361238B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • 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
    • B29C45/6707—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement
    • B29C45/6714—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement using a separate element transmitting the mould clamping force from the clamping cylinder to the mould
    • B29C45/6728—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement using a separate element transmitting the mould clamping force from the clamping cylinder to the mould the separate element consisting of coupling rods
    • 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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/4005—Ejector constructions; Ejector operating mechanisms
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1476—Special return means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/14—Energy-recuperation means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • 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
    • B29C2045/824—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/625—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/77—Control of direction of movement of the output member
    • F15B2211/7716—Control of direction of movement of the output member with automatic return

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The present invention relates to a kind of piston-cylinder units for molding machine, including：First chamber (2), hydraulic pump (3), the hydraulic pump connect to be loaded with the hydraulic fluid under pressure with the first chamber (2), and the resetting apparatus (4) for making the piston of piston-cylinder units (1) (5) be resetted along the direction essentially the inverse with the action direction of the first chamber (2), wherein, second chamber (6) of the resetting apparatus (4) with piston-cylinder units (1) and with accumulator (7), the accumulator (7) connect with the second chamber (6) and/or with the second chamber (6) it is integral construct, wherein, resetting apparatus (4) is configured to that piston (5) is made to reset to reproducible home position, accumulator is in the home position by complete pressure release.

Description

Piston-cylinder unit and molding machine for molding machine
Technical field
The present invention relates to the piston-cylinders for molding machine described in a kind of feature according to the preamble of claim 1 Unit.
Background technology
Molding machine can be understood as injection molding machine, die casting machine, forming press and similar machinery herein.
This piston-cylinder unit include the first chamber, in order to under pressure hydraulic fluid load and with first chamber The hydraulic pump of connection and for making the piston of piston-cylinder unit along the direction essentially the inverse with the action direction of first chamber The resetting apparatus resetted.When only piston-cylinder unit is important to molding cycles itself along the effect of the action direction of the first chamber When, the resetting apparatus for the piston-cylinder unit can use in the molding machine.Piston-cylinder unit is then necessary Again it is sent in initial position, thus precisely the presence of resetting apparatus.It is well known in the art by piston-cylinder unit with Second chamber of pump (or another pump) connection of hydraulic system executes reset.It can be by the work by the pressure-loaded of the second chamber Plug-cylinder unit sends back in initial position.
But this have the disadvantage that can lose the time resetted for piston-cylinder unit during molding cycles.This Outside, the hydraulic fluid of higher volumes is needed in the system of the second chamber and must manipulate pump to reset.
Specifically, in pressure pad, that is, in piston-cylinder unit, in order to be established at the mode locking unit of molding machine Clamp force, it is necessary to first reduce the pressure (clamp force reduction) in the first chamber thus.Then can just be added by the pressure of the second chamber It is loaded into the reset of row piston.
In order to improve this situation, propose in the prior art electrical for what is automatically reset (DE102005051787A1) or (US2016/0067898A1) mechanism of mechanical elasticity.But which results in more expensive and complicated Structure design much (referring to the attached drawing for the document of the prior art mentioned).In addition, especially going out when using mechanical type spring Showed is difficult the problem of matching with the mold height of the shaping jig in mode locking unit to be mounted on, because of the length of mechanical type spring Degree and spring strength can not adjust.Although there is not this problem with electric reset, additional precision is being needed Electric drive must be provided in component (such as leading screw) and more high-cost, hydraulic pressure in principle molding machine.For the second chamber Hydraulic mechanism and the electric drive must additionally be controlled coordinated with each otherly.
In addition, in DE19654917A1, DE1169117B, JPS5933130A, JP2009228706A and The different types of accumulator of the piston reset for making piston-cylinder unit is also disclosed in DE19842534A1.But the storage Depressor requires to utilize the function of accumulator using more complicated hydraulic pressure and valve gear always.
Invention content
Therefore, the task of the present invention is a kind of resetting apparatus more simpler than the prior art is provided, the resetting apparatus is not It can cause or only cause to lesser extent the retardation as caused by structure type of molding cycles.
The task is solved by a kind of piston-cylinder unit of feature with claim 1.
This occurs in the following way, that is, second chamber of the resetting apparatus with piston-cylinder unit and with accumulator. The accumulator connect with the second chamber or with second chamber it is integral construct.By loading the first chamber and shoe with the fluid of hydraulic pressure Hydraulic fluid is expressed into from the second chamber in accumulator by the original task of row piston-cylinder unit, therefore accumulator is pressurized. In the embodiment of accumulator and the integral construction of the second chamber, accumulator is directly pressurized.
Reduce if this is engraved in pressure present in the first chamber, then the reset of accumulator releasing pressure automatically and piston subtracts with pressure It is small to occur simultaneously.
Therefore the present invention can make piston reset to the loss of no circulation time with simple structure design and simultaneously.Except liquid Any other driver is not needed outside the driver of pressure.
Furthermore, it is possible to be realized in a simple manner pair together with the amount of the hydraulic fluid in accumulator in the second chamber by changing The adjustment (resetting until the home position) of home position.
According to the present invention, allow the reset of piston, until accumulator is by complete pressure release, this is shown to be a kind of reproducible multiple Position.Because once accumulator occurs as soon as the corresponding pressure loss by pressure release, answering for home position is crossed in pressure loss prevention Position.
This is a kind of particularly simple embodiment of the piston-cylinder unit for molding machine, because can be automatic and fast It is resetted fastly, without controlling or regulating pump or valve thus.
When piston-cylinder unit according to the invention is used as the pressure for generating clamp force in the mode locking unit of molding machine When pad, further it is an advantage that, it can be extremely simplely by changing the amount of the hydraulic fluid in the second chamber and by usual Already existing hydraulic mechanism and simple valve technology realize the adjustment of reproducible home position.
The power of reduction position can also be lowered in multiple situations.In gasbag-type reservoir, this can be for example by changing gas Body boost pressure is realized.
Hydraulic oil can be used as hydraulic fluid.
Other advantageous embodiments of the present invention limit in the dependent claims.
Piston-cylinder unit according to the invention can for example be used to load clamp force in the mode locking unit of molding machine.Lock The backing-out punch of form unit can also be driven with piston-cylinder unit according to the invention.Backing-out punch for will be molded over molding machine or Product in shaping jig is removed from corresponding mold or from corresponding tool.
Accumulator can particularly simply be configured to gasbag-type reservoir and/or diaphragm type reservoir.
There is gasbag-type reservoir pressure vessel, hydraulic fluid and compressible medium to be separated from each other ground by air bag flexible It is present in the pressure vessel.Hydraulic fluid herein can be in the state of accumulator pressure release also by pressure medium completely from pressure Container squeezes out.Can especially it use gas as pressure medium.One example of pressure medium is exactly nitrogen.Pass through the blowing pressure Matching can easily adjust reset (" spring constant ").
In diaphragm type reservoir, diaphragm replaces air bag to be used to detach compressible medium and hydraulic fluid.
First chamber can be the chamber of the bar side of piston-cylinder unit.Especially in the double plate structure shape for usually carrying four beams In the mode locking unit of the injection molding machine of formula, it can be createed in this way with method and be configured to especially small mode locking unit, the lock Form unit also has quickly and automatically resets beam.
Second chamber can have the effective cross section of pressure more smaller than the first chamber.It is answered when by the piston-cylinder unit When generating extra high power, when the first chamber being required to have the effective cross section of higher pressure thus, this point is particularly advantageous.This Outside, since the second chamber has the effective cross section of smaller pressure, the force effect of the first chamber is overcome by the supercharging of accumulator by is made Counter-force smaller.
The effective cross section of small pressure of the second chamber can be generated in the following way such as relatively simplely, that is, the Two chambers by piston protruding portion limited boundary, wherein the protruding portion have cross section more smaller than piston.It especially can be first Chamber be the chamber of bar side piston-cylinder unit in this embodiment is advantageously used.
When the second chamber is arranged in the end of the end side of the protruding portion, the one kind for having obtained the present invention is particularly simple Embodiment.
It can be stated that the second chamber with it is described pump and/or another pump connect, wherein on the one hand it is described pump and/or it is another It is equipped with check-valves in connecting line between a pump and on the other hand the second chamber, it is possible thereby to particularly simply realize mold height Adjustment or the adjustment of position, resetting apparatus promotes piston reset until the position (home position).By opening check-valves Hydraulic fluid is sent into the second chamber (or accumulator).Just automatically reset in accumulator pressure release to by two chambers and accumulator That corresponding position of volume of hydraulic medium in the system of composition.
First chamber can have the discharge line for hydraulic medium, wherein preferably set check-valves in the discharge line. This enables piston reset particularly simple and fast because the first chamber by pressure-loaded and therefore accumulator supercharging state In, it is only necessary to the check-valves in the outgoing line is opened, to cause the pressure in the first chamber to decline simultaneously and piston Reset.
It is claimed as well as one kind by least two, preferably four piston-cylinder units constructed according to the present invention The device of composition, wherein the second chamber of at least two piston-cylinder unit is connect with only one accumulator.
It is claimed as well as a kind of molding machine, which carries above-mentioned apparatus or at least one according to the present invention Piston-cylinder unit.
Several stroke sensors can be set, position of the piston in cylinder can be detected with the stroke sensor.
Description of the drawings
Other advantages and details of the present invention are by attached drawing and relevant obtain.In attached drawing：
Fig. 1 a, 1b show two embodiments of the invention in first position；
Fig. 2 a, 2b show two embodiments of the invention in the second position；
Fig. 3 a, 3b show two embodiments of the invention in the third place；
Fig. 4 a, 4b show two embodiments of the invention in the 4th position；
Fig. 5 shows cylinder-piston unit according to the invention for driving backing-out punch；And
Fig. 6 shows molding machine according to the invention.
Specific implementation mode
Fig. 1 a show a piston-cylinder unit 1 according to the invention, carry the first chamber 2, piston 5 and the second chamber 6. First chamber 2 of bar side in the mode locking unit 15 of injection molding machine for example for loading clamp force.First chamber 2 is connect with pump 3 thus.The Two chambers 6 are then connect with accumulator 7.
In the embodiment by Fig. 1 a, discharge line 12 is the intake line 14 towards the first chamber 2 simultaneously.In the row Go out in pipeline 12 also to arrange a check-valves 11, the second chamber 6 also connect with pump 3 other than being connect with accumulator 7, i.e. by Connecting line 9 is also connect with pump 3.Having been also set up from the tank body of the second chamber 6 to hydraulic fluid by the connecting line 9 (does not have Reference numeral) connection.Two check-valves 11 are also in connecting line 9, one of them is used for the connection of the second chamber 6 and pump 3, Connection of the other in which for the second chamber 6 and the tank body.
Using hydraulic oil as hydraulic fluid.
Check-valves 11 is preferably designed to centre valve.The check-valves provides the leakproofness of height, and this is advantageous, Because the amount of the hydraulic medium in the system being made of two chambers 6 and accumulator 7 and corresponding pipeline then can be as permanent as possible It is fixed.
One is obtained by the constancy of the amount of the hydraulic fluid in the system being made of two chambers 6 and accumulator 7 Reproducible and constant position, resetting apparatus 4 according to the invention make piston 5 reset until the position.
Accumulator 7 is designed to gasbag-type reservoir, wherein for example using there is minimum supply pressure P0The about nitrogen of 10bar Gas is as pressure medium.
Fig. 1 b show a variant scheme of the embodiment of Fig. 1 a.It differs in that the second chamber 6 does not have With 2 identical cross section of the first chamber.This point realizes that the protruding portion 8 has more smaller than piston 5 by the protruding portion 8 of piston 5 Cross section.Cylinder is then correspondingly molded.
Another advantage of the smaller design scheme in cross section of protruding portion 8 is, overcomes by the supercharging of accumulator 7 The effect of the pressure-loaded of one chamber 2 and the counter-force that applies is less than counter-force in the case of according to the embodiment of Fig. 1 a because The effective cross section of pressure of first chamber is more than the effective cross section of pressure of the second chamber in this case.
It is between the embodiment according to Fig. 1 a and 1b another difference is that hydraulic pressure connect up.In the embodiment party according to Fig. 1 b In case, there is the first chamber 2 individual discharge line 12, the discharge line to be passed through tank body.Towards the second chamber intake line 14 such as Discharge line 12 and connecting line 9 have corresponding check-valves like that.It should be noted that according to the hydraulic pressure cloth of Fig. 1 a and Fig. 1 b Line can also use in other embodiments respectively.
Fig. 1 a and 1b show corresponding embodiment under static state, under static state be not present pressure chamber 2, 6 pressure-loaded.
The basic fixed position of piston 5 is shown in Fig. 2 a and 2b.By opening the check-valves 11 being in connecting line 9 (tank body direction) and opening are in the check-valves 11 in intake line 14 (or in the case of Fig. 2 a be discharge line 12), can To reduce the amount of the hydraulic fluid in the second chamber 6 (piston 5 moves right).By running pump 3 and correspondingly changing non-return The switching position of valve 11 can improve the amount.
The corresponding variant scheme in the first chamber 2 of pressure-loaded is shown in Fig. 3 a and 3b.Therefore accumulator 7 is increased Pressure, this can see in figure by the strained diaphragm of gasbag-type reservoir.
Here, hydraulic medium is transported into the first chamber 2 by pump 3.Check-valves 11 needed for thus is open.Remaining check-valves 11 are to close.
The reset according to the invention by the accumulator for corresponding variant scheme is shown in figs 4 a and 4b.It is logical The check-valves 11 opened in outlet 12 is crossed, hydraulic medium is come out from the first chamber 2 and (passing through pump 3 in the case of Fig. 4 a) stream Return to tank body.Accumulator 7 plays it and acts on and make piston 5 with the disappearance of the pressure in the first chamber 2 while resetting to base now This position, the home position combination Fig. 2 a and 2b have been illustrated, wherein accumulator 7 is in the home position according to described Embodiment is by complete pressure release.
As long as hydraulic fluid is in accumulator, then being provided with certain minimum supply pressure (the blowing pressure).If total Oil mass is all removed, then just the automatic customer for no longer providing supply pressure and being connected just stops here.
An embodiment according to the invention for piston-cylinder unit 1 is shown in FIG. 5, the piston-cylinder unit is for example It can use in the backing-out punch of the mode locking unit 15 of injection molding machine.Here, the second chamber 6 is the chamber of the bar side of piston-cylinder unit 1.
In order to eject molded part, with the first chamber of pressure-loaded 2.Therefore piston 5 and the backing-out punch being fixed on the piston (not shown) moves right in figure.Therefore accumulator 7 is also pressurized.In order to retract backing-out punch, it is only necessary to by hydraulic fluid from One chamber 2 is discharged.Underground is without being illustrated shown between pump 3 and the first chamber 2.
Fig. 6 shows molding machine 10 according to the invention, is injection molding machine in the current situation.The molding machine is by mode locking unit 15 and with plasticizing machining worm injecting unit 16 constitute.
Mode locking unit 15 has mold cramping for installation forming tool, being moved relative to each other by fast stroke cylinder Plate.When injection molding, it is necessary to load mold cramping plate with big clamp force.Several piston-cylinder units 1 (pressure pad) are set thus.
Especially the wiring of the hydraulic pressure of the worm drive of hydraulic pressure and fast stroke cylinder is equally without being illustrated.
The invention is not limited in the embodiments being shown here.Piston-cylinder unit 1 for example also can be by rotary piston structure side Formula designs.Pump 3 can be made of the system of multiple pumps 3.The cylinder and piston 5 of piston-cylinder unit 1 from geometric meaning for can be with Be respectively have it is circular, polygon also or the cylinder of increasingly complex basal plane.

Claims (12)

1. for the piston-cylinder unit of molding machine, including：
- the first chamber (2),
Hydraulic pump (3), the hydraulic pump connect to be loaded with the hydraulic fluid under pressure with the first chamber (2), and
For making the piston (5) of piston-cylinder unit (1) be carried out along with the essentially the inverse direction of the action direction of the first chamber (2) The resetting apparatus (4) of reset,
Wherein, second chamber (6) of the resetting apparatus (4) with piston-cylinder unit (1) and with accumulator (7), the accumulator (7) connect with the second chamber (6) and/or with the second chamber (6) it is integral construct, which is characterized in that resetting apparatus (4) is configured to Piston (5) is set to reset to reproducible home position, accumulator is in the home position by complete pressure release.
2. piston-cylinder unit described in accordance with the claim 1, which is characterized in that the piston-cylinder unit (1) is for being molded Clamp force is loaded in the mode locking unit of machine.
3. according to piston-cylinder unit as claimed in claim 1 or 2, which is characterized in that the piston-cylinder unit (1) is used as molding The driver of the backing-out punch of the mode locking unit of machine.
4. according to preceding claims any one of them piston-cylinder unit, which is characterized in that accumulator (7) is configured to air bag Formula reservoir and/or diaphragm type reservoir.
5. according to preceding claims any one of them piston-cylinder unit, which is characterized in that the first chamber (2) is the piston- The chamber of the bar side of cylinder unit (1).
6. according to preceding claims any one of them piston-cylinder unit, which is characterized in that the second chamber (6) has than first Chamber (2) effective cross section of smaller pressure.
7. according to preceding claims any one of them piston-cylinder unit, which is characterized in that the second chamber (6) is by the piston (5) protruding portion (8) limited boundary, wherein the protruding portion (8) has cross section more smaller than piston (5).
8. piston-cylinder unit according to claim 7, which is characterized in that the second chamber (6) is arranged in the end of the protruding portion The end of side.
9. according to preceding claims any one of them piston-cylinder unit, which is characterized in that the second chamber (6) and the pump (3) And/or another pump connection, wherein the pump (3) and/or another described pump and on the other hand the second chamber on the one hand (6) check-valves (11) is equipped in the connecting line (9) between.
10. according to preceding claims any one of them piston-cylinder unit, which is characterized in that the first chamber (2) be used for hydraulic pressure The discharge line (12) of medium connects, wherein is preferably provided with check-valves (11) in the discharge line (12).
11. according to preceding claims any one of them piston-cylinder unit, which is characterized in that it is equipped with stroke sensor (13), The trip sensor is arranged for the position of detection piston (5).
12. molding machine, it includes at least one according to claim 1 to 11 any one of them piston-cylinder unit.
CN201810077573.2A 2017-01-27 2018-01-26 Piston-cylinder unit for a molding machine and molding machine Active CN108361238B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111516229A (en) * 2019-02-01 2020-08-11 恩格尔机械(上海)有限公司 Drive device for a molding machine and molding machine having a drive device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3907702A1 (en) * 1988-03-12 1989-09-21 Karl Hehl Drawing tool for forming sheets
DE19842534A1 (en) * 1998-08-01 2000-02-03 Mannesmann Rexroth Ag Hydrostatic drive system for an injection molding machine and method for operating such a drive system
DE19926566A1 (en) * 1999-06-11 2000-12-14 Boy Gmbh Dr Hydraulic drive closing mold of injection molding machine, employs piston in pressure converter as main stage of proportional valve
CN1817611A (en) * 2006-03-07 2006-08-16 太原理工大学 Injection machine system with electromechanical liquid composite control
DE102005043571A1 (en) * 2005-09-12 2007-03-22 Bosch Rexroth Ag Drive unit for a moving part, especially the upper tool of a press brake, comprises two hydraulic cylinders controlled by a shift valve
CN101835601A (en) * 2007-09-12 2010-09-15 特鲁普机械奥地利有限公司及两合公司 Drive device for a bending press
CN205533472U (en) * 2016-04-01 2016-08-31 天津市天锻压力机有限公司 Super high -pressure system of hydroforming hydraulic press

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1169117B (en) * 1961-08-15 1964-04-30 Mannesmann Meer Ag Mold closing and mold locking device for injection molding machines and presses
JPS5933130A (en) * 1982-08-19 1984-02-22 Toshiba Mach Co Ltd Oil-pressure circuit for injection molding machine
DE19654917A1 (en) * 1996-04-18 1998-01-08 Kunkel Hans Achim Die closing mechanism
JP4504784B2 (en) 2004-10-29 2010-07-14 東芝機械株式会社 Mold drive device for molding machine
DE102008007793A1 (en) * 2008-02-06 2009-08-13 Robert Bosch Gmbh Linear drive with a spindle drive
JP2009228706A (en) * 2008-03-19 2009-10-08 Sodick Plastech Co Ltd Impact pressure absorbing device of hydraulic control device, injection control circuit of injection device including the impact pressure absorbing device, and clamping control circuit of clamping device including the impact pressure absorbing device
WO2014183201A1 (en) 2013-05-14 2014-11-20 Athena Automation Ltd. High speed clamp system for an injection molding machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3907702A1 (en) * 1988-03-12 1989-09-21 Karl Hehl Drawing tool for forming sheets
DE19842534A1 (en) * 1998-08-01 2000-02-03 Mannesmann Rexroth Ag Hydrostatic drive system for an injection molding machine and method for operating such a drive system
DE19926566A1 (en) * 1999-06-11 2000-12-14 Boy Gmbh Dr Hydraulic drive closing mold of injection molding machine, employs piston in pressure converter as main stage of proportional valve
DE102005043571A1 (en) * 2005-09-12 2007-03-22 Bosch Rexroth Ag Drive unit for a moving part, especially the upper tool of a press brake, comprises two hydraulic cylinders controlled by a shift valve
CN1817611A (en) * 2006-03-07 2006-08-16 太原理工大学 Injection machine system with electromechanical liquid composite control
CN101835601A (en) * 2007-09-12 2010-09-15 特鲁普机械奥地利有限公司及两合公司 Drive device for a bending press
CN205533472U (en) * 2016-04-01 2016-08-31 天津市天锻压力机有限公司 Super high -pressure system of hydroforming hydraulic press

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111516229A (en) * 2019-02-01 2020-08-11 恩格尔机械(上海)有限公司 Drive device for a molding machine and molding machine having a drive device

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AT519581B1 (en) 2019-02-15
CN108361238B (en) 2023-07-28
DE102018101727A1 (en) 2018-08-02
DE102018101727B4 (en) 2020-11-12
AT519581A1 (en) 2018-08-15

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