CN106930987B - Hydraulic system and molding machine for the element loading force to molding machine - Google Patents
Hydraulic system and molding machine for the element loading force to molding machine Download PDFInfo
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- CN106930987B CN106930987B CN201511018764.4A CN201511018764A CN106930987B CN 106930987 B CN106930987 B CN 106930987B CN 201511018764 A CN201511018764 A CN 201511018764A CN 106930987 B CN106930987 B CN 106930987B
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- hydraulic
- regulating valve
- fluid pressure
- pressure line
- chamber
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- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Fluid-Pressure Circuits (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a kind of hydraulic systems for the element loading force to molding machine, the hydraulic system includes: for providing the hydraulic pump (2) for the hydraulic fluid for being loaded pressure, container (3) for hydraulic fluid, regulating valve (4), the regulating valve by the first fluid pressure line (5) and with hydraulic pump (2) hydraulic connecting and by the second fluid pressure line (6) and with container (3) hydraulic connecting, piston-cylinder unit (7), by the piston-cylinder unit, the element of molding machine (10) can be loaded power since chamber (8) is loaded pressure, wherein, the chamber (8) of piston-cylinder unit (7) in the first position of regulating valve (4) with the first fluid pressure line (5) hydraulic connecting, and chamber (8) in the second position of regulating valve (4) with second fluid pressure line (6) hydraulic connecting, wherein second fluid pressure line (6) and accumulator (9) hydraulic connecting.
Description
Technical field
The present invention relates to a kind of hydraulic systems for the element loading force to molding machine.
Background technique
Molding machine can be regarded as injection (mo(u)lding) machine, injection molding machine and press machine and analog herein.
Such hydraulic system in the injecting unit of injection (mo(u)lding) machine for example for giving plasticizing worm screw on-load pressure.
Occurs relatively large power herein, the relatively large power is required for the correct forming for ensuring the component that need to be manufactured.It is infusing
It penetrates under the concrete condition of molding machine, this is, for example, in order to compensate for component contraction while cooling and similar effect and after being maintained
Pressure.The pressure-loaded in order to after and make corresponding regulating valve enter a position (second position), it is in this position, hydraulic
Fluid can leak to container via fluid pressure line (the second fluid pressure line) from the corresponding chamber of piston-cylinder unit.
Because generating big power when pressure after load and thus generating high hydraulic pressure, beaten in regulating valve
Very big pressure peak is formed in (second) fluid pressure line and in container itself when opening.This is generally resulted in, these knots
Constitutive element part leakage, until the weld seam rupture on container.
Measure used to solve the problem known in the prior art is confined to the biggish size and storage of fluid pressure line
Deposit the reinforcing of case.
Summary of the invention
The object of the present invention is to provide a kind of hydraulic system, which is prevented described using simple measure
Pressure peak.
The purpose is realized by a kind of hydraulic system with feature as described below.It is according to the invention to be used for molding machine
The hydraulic system of element loading force include: for providing the hydraulic pump for the hydraulic fluid for being loaded pressure；For hydraulic fluid
Container；Regulating valve, the regulating valve is by the first fluid pressure line and with hydraulic pump hydraulic connecting and by the second hydraulic tube
Lu Eryu container hydraulic connecting；Piston-cylinder unit, by the piston-cylinder unit, the element of molding machine is due to chamber quilt
On-load pressure and power can be loaded；Wherein, the chamber of piston-cylinder unit is in the first position of regulating valve with described first
Fluid pressure line hydraulic connecting, and chamber in the second position of regulating valve with the second fluid pressure line hydraulic connecting, to finish
Beam makes regulating valve enter the second position pressure-loaded of the chamber, and in the second position, hydraulic fluid can be from piston-
The chamber of cylinder unit is via the second hydraulic pipeline leakage to container, which is characterized in that the chamber is in the second position of regulating valve
Via second fluid pressure line and accumulator hydraulic connecting, so that being generated in container and in the second fluid pressure line smaller
The maximum pressure of appearance, from chamber via the hydraulic connecting of second fluid pressure line to accumulator in the second position of regulating valve
Substantially straight line, in the second position of regulating valve from chamber via the hydraulic connecting of second fluid pressure line to container
With at least one bending section, and accumulator is not necessarily to also work as a buffer.
This is accomplished in that fluid pressure line (the second liquid connecting in the chamber that will be loaded pressure with container
Pressure pipe road) in connect with accumulator.If now in the second fluid pressure line due to the respective chamber of piston-cylinder unit is unloaded
There is pressure peak, then the pressure peak is absorbed by accumulator first.In in the next period of time, accumulator is beyond certain
Period discharge stored energy.This is by applying pressure from accumulator to the hydraulic fluid being located in the second fluid pressure line
Power is realized.Because compared to pressure peak will duration this realized on the slightly longer period, storing
The maximum pressure of smaller appearance is generated in case and in the second fluid pressure line.
Herein it is to be noted that accumulator is not necessarily to also work as a buffer.The main reason for present invention works is
The storage of pressure and then by the pressure beyond discharging in longer time section.
It is to be noted that it is known that applying buffer element or compensation container and the like in the hydraulic of pump side
In pipeline.However this is used to inhibit such as pressure oscillation as caused by the geometric molding of hydraulic pump or pressure arteries and veins as pump characteristics
Punching.
It is preferred that it may be stipulated that: accumulator has compressed media and movable for separating compressed media with hydraulic fluid
Resolution element.Accumulator according to the invention can be particularly simply designed in configuration aspects in such a way.Preferably, it stores
Depressor has preferred capsule made of rubber as resolution element.
This is particularly suitable for when accumulator is configured to bladder type hydropneumatic accumulator.
Other than bladder type hydropneumatic accumulator, such as piston accumulator also can be used.
Particularly preferably following embodiment, in this embodiment, the compressed media of accumulator is gas, this is because
Quickly load accumulator can be particularly simply realized by gas and omits the above-mentioned characteristic for the pressure that On The Drug Release is stored.It can make
Gas for example can be nitrogen or air.
But other compressed medias that can quickly and readily compress also can be used.
Preferably, regulating valve is configured to by-passing valve.
From described in a kind of particularly preferred embodiment of the invention it may be stipulated that: in the second position of regulating valve
Chamber is substantially straight line via the hydraulic connecting of the second fluid pressure line to accumulator.It can sufficiently be used by the measure
Flox condition in two fluid pressure lines, to realize the quick and direct load to accumulator.
In addition, it may be stipulated that: from described in the second position of regulating valve in a kind of expansion scheme preferably
Chamber has at least one bending section via the hydraulic connecting of the second fluid pressure line to container.Therefore it can pass through the second hydraulic tube
The molding on road is further following to influence the flox condition in second fluid pressure line, that is, make pressure peak avoid container and
The part of the container side of second fluid pressure line and will rise be directed in accumulator.
Same protection has the molding machine of hydraulic system according to the invention.
The present invention can for example use in piston-cylinder unit, and the piston-cylinder unit is used for injection ram, modeling
Change worm screw and pusher and the like loading force.
Detailed description of the invention
Further advantage and details of the invention is obtained by attached drawing with the Detailed description of the invention for being associated with attached drawing.Wherein:
Fig. 1 shows hydraulic system according to the invention
Fig. 2 shows molding machines according to the invention, wherein the present invention applies in plasticizing worm screw；
Fig. 3 shows molding machine according to the invention, wherein the present invention applies in pusher.
Specific embodiment
First it can be seen that piston-cylinder unit 7, hydraulic pump 2 and container 3 in Fig. 1.First fluid pressure line 5 and second
Hydraulic pump 2 or container 3 are connect by fluid pressure line 6 with piston-cylinder unit 7.
Simplifiedly be shown as in this case the regulating valve 4 of four-way valve herein according to position otherwise by hydraulic pump 2 (via
First fluid pressure line 5) it connect (first position) with chamber 8 or container 3 (via the second fluid pressure line 6) connect to (with chamber 8
Two positions).
It should be noted that replacing four-way valve to use more complex underground in practice.Simplified implementation is selected herein
Mode, so as to show the principle of the present invention well.
In addition, 6 hydraulic connecting of accumulator 9 according to the invention and the second fluid pressure line.The structure in this case of accumulator 9
As bladder type hydropneumatic accumulator.The bladder type hydropneumatic accumulator includes pressure vessel, and air bag made of rubber is equipped in the pressure vessel.Make
For compressed media, air bag is filled with gas, such as nitrogen.If present hydraulic fluid flows under pressure into pressure vessel, that
Air bag is extruded and thus pressure is stored in the air bag.Air bag made of rubber prevents to be situated between in hydraulic fluid and compression
It is mixed between matter.
Hydraulic oil is used as hydraulic fluid.
Fig. 1 shows regulating valve 4 in the second position.In first position, as already mentioned, hydraulic pump 2 with
Chamber 8 connects, thus which is loaded pressure.This causes the piston of piston-cylinder unit to be loaded power and further results in molding
The respective element (such as plasticizing worm screw, injection ram and pusher and analog) of machine is loaded power.
If present regulating valve 4 enters in the second position, the flow of pressurized as this is shown in FIG. 1, in chamber 8
Body flows out suddenly.Generated pressure peak is intercepted by accumulator 9 first.This obtains the auxiliary of the moulding of the second fluid pressure line 6.
Because the path from chamber 8 to accumulator 9 (compensation energy accumulator) is straight line, the dominant contribution of pressure peak is by accumulator 9
It absorbs.This obtains the auxiliary of three bending sections 11 in the second fluid pressure line 6, wherein the bending of accumulator 9 most nearby is arranged in
Portion is most important for the effect.Remaining bending section 11 is only used for assisting the effect.
After accumulator 9 is loaded, which discharges stored pressure (in other words again on the slightly longer period
The energy of storage) so that the pressure spike in container 3 and in the part of the container side of the second fluid pressure line 6
Value is substantially reduced.
Thus it is likely that the second fluid pressure line 6 and container 3 be all equipped with lesser size or need not to this two
A structural detail takes expensive enhancements.
Fig. 2 shows arragement construction of the present invention in molding machine 10, wherein and the present invention is applied herein in plasticizing worm screw,
The plasticizing worm screw is arranged inside plasticization unit 12.
Fig. 3 is shown, and how the present invention applies in the pusher 13 of molding machine 10.
Certainly be easy it is possible that: the present invention be for example also employed in for established by closing unit or the like close
In the pressure pad of pressure.It will also be appreciated that the embodiment for being described herein and mentioning can be freely combined.
Claims (9)
1. for the hydraulic system of the element loading force to molding machine, which includes:
For providing the hydraulic pump (2) for the hydraulic fluid for being loaded pressure,
It is used for the container (3) of hydraulic fluid,
Regulating valve (4), the regulating valve is by the first fluid pressure line (5) and with hydraulic pump (2) hydraulic connecting and by second
Fluid pressure line (6) and with container (3) hydraulic connecting,
Piston-cylinder unit (7), by the piston-cylinder unit, the element of molding machine (10) is loaded due to chamber (8)
Pressure and power can be loaded,
Wherein, the chamber (8) of piston-cylinder unit (7) in the first position of regulating valve (4) with first fluid pressure line
(5) hydraulic connecting, and chamber (8) in the second position of regulating valve (4) with the second fluid pressure line (6) hydraulic connecting, be
Terminate the pressure-loaded to the chamber (8) and regulating valve (4) is made to enter the second position, in the second position, hydraulic fluid
Container (3) can be leaked to via the second fluid pressure line (6) from the chamber (8) of piston-cylinder unit (7),
It is characterized in that, the chamber (8) is in the second position of regulating valve (4) via second fluid pressure line (6) and pressure accumulation
Device (9) hydraulic connecting, so that generating the maximum pressure of smaller appearance, In in container (3) and in the second fluid pressure line (6)
It is basic via the hydraulic connecting of the second fluid pressure line (6) to the accumulator (9) from chamber (8) in the second position of regulating valve (4)
On be straight line, from chamber (8) via second fluid pressure line (6) to container (3) in the second position of regulating valve (4)
Hydraulic connecting has at least one bending section (11), and accumulator (9) is It is not necessary to also work as a buffer.
2. hydraulic system described in accordance with the claim 1, which is characterized in that accumulator (9) has compressed media and for that will press
The movable resolution element that contracting medium is separated with hydraulic fluid.
3. hydraulic system according to claim 2, which is characterized in that accumulator (9) is configured to bladder type hydropneumatic accumulator.
4. hydraulic system described in accordance with the claim 3, which is characterized in that accumulator (9) has capsule as resolution element.
5. according to hydraulic system described in one of claim 2 to 4, which is characterized in that compressed media is gas.
6. according to hydraulic system described in one of Claims 1-4, which is characterized in that regulating valve (4) is configured to by-passing valve.
7. hydraulic system according to claim 4, which is characterized in that the capsule is made of rubber.
8. molding machine comprising according to hydraulic system described in one of claim 1 to 7.
9. molding machine according to claim 8, which is characterized in that molding machine (10) through stress load the element be
Injection ram and/or plasticizing worm screw and/or pusher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511018764.4A CN106930987B (en) | 2015-12-30 | 2015-12-30 | Hydraulic system and molding machine for the element loading force to molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511018764.4A CN106930987B (en) | 2015-12-30 | 2015-12-30 | Hydraulic system and molding machine for the element loading force to molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106930987A CN106930987A (en) | 2017-07-07 |
| CN106930987B true CN106930987B (en) | 2019-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511018764.4A Active CN106930987B (en) | 2015-12-30 | 2015-12-30 | Hydraulic system and molding machine for the element loading force to molding machine |
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| CN104421225A (en) * | 2013-08-21 | 2015-03-18 | 哈尔滨智晟天诚科技开发有限公司 | Marine steering gear hydraulic loading test apparatus |
| CN104454683A (en) * | 2014-11-13 | 2015-03-25 | 浙江大学 | Novel hydraulic transformer based on liquid capacitance energy storage |
| CN204386962U (en) * | 2015-01-14 | 2015-06-10 | 山东宏康机械制造有限公司 | A kind of plate bending rolls hydraulic system |
| CN104948541A (en) * | 2015-06-04 | 2015-09-30 | 宿州同创机械设备有限公司 | Hydraulic overflow energy recycling system |
| CN204805189U (en) * | 2015-04-24 | 2015-11-25 | 中国人民解放军装甲兵工程学院 | Electronic servo hydraulic power source of four -footed robot |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202149103U (en) * | 2011-05-23 | 2012-02-22 | 安徽星马汽车股份有限公司 | Protection device of concrete pump vehicle main oil-return filter |
| US8826654B2 (en) * | 2011-05-31 | 2014-09-09 | Caterpillar Inc. | Hydraulic fluid system |
| CN102735513B (en) * | 2012-07-19 | 2014-08-06 | 河北省交通规划设计院 | Movable asphalt mixture forming machine |
-
2015
- 2015-12-30 CN CN201511018764.4A patent/CN106930987B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104421225A (en) * | 2013-08-21 | 2015-03-18 | 哈尔滨智晟天诚科技开发有限公司 | Marine steering gear hydraulic loading test apparatus |
| CN104454683A (en) * | 2014-11-13 | 2015-03-25 | 浙江大学 | Novel hydraulic transformer based on liquid capacitance energy storage |
| CN204386962U (en) * | 2015-01-14 | 2015-06-10 | 山东宏康机械制造有限公司 | A kind of plate bending rolls hydraulic system |
| CN204805189U (en) * | 2015-04-24 | 2015-11-25 | 中国人民解放军装甲兵工程学院 | Electronic servo hydraulic power source of four -footed robot |
| CN104948541A (en) * | 2015-06-04 | 2015-09-30 | 宿州同创机械设备有限公司 | Hydraulic overflow energy recycling system |
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| Publication number | Publication date |
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| CN106930987A (en) | 2017-07-07 |
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