CN1500614A - Mixed actuator of single motor pressed jet and spiral drive - Google Patents
Mixed actuator of single motor pressed jet and spiral drive Download PDFInfo
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- CN1500614A CN1500614A CNA021504598A CN02150459A CN1500614A CN 1500614 A CN1500614 A CN 1500614A CN A021504598 A CNA021504598 A CN A021504598A CN 02150459 A CN02150459 A CN 02150459A CN 1500614 A CN1500614 A CN 1500614A
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Abstract
Of the mixed executing mechanism, the improved device for making the load to rotate and/or move axially relatively to the main body includes main body; motor installed onto the main body and with output shaft for the load to rotate relatively to the main body; piston installed on the main body to define the first capacity variable cavity and to make the load move axially relatively to the main body; energy accumulator filled to preset pressure; fluid inside the first cavity and the energy accumulator; pump driven by the motor to exhaust fluid from the first cavity to the energy accumulator; and valve to make fluid flow selectively from the energy accumulator to the first cavity for the piston and the load to move axially relatively to the main body.
Description
Technical field
The present invention relates generally to the field under the actuator that is used for injection molding machinery, relate in particular to improved single motor injection of being used for injection molding machinery or similar machinery-and-the mixing actuator of screw drives.
Background technique
In the past, plastic injected die machinery uses the hydraulic actuator that send system to supply with power by the central liquid press pump to finish various mechanically actuateds, for example closes and the clamp mode pressing plate, rotates the plasticizing agent screw rod, and the plastics of fusion are sprayed in the model.For example, see " the injection moulding control of thermoplastic " (" the Control for Injection Molding ofThermoplastic ") of technical bulletin 145 (in June, 1980) east, New York dawn (East Aurora) Mu Ge (Moog) Co., Ltd, the disclosed all the elements of the document are included by the reference mode at this
Now, adopting some direct acting electric notors to carry out these functions is a kind of trend.But, experience shows, this motor is not to mate well with load, to this problem preferably solution be to use electricity/liquid hybrid drive, this structure is 3-3389 and claimant's a co-pending application 09/709 at the open text of Japanese Utility Model authorization, in 904, all express the mixed organization of operation model sealing.At first utilize electric notor and screw mechanism work, can not only realize major function, and promote a piston fluid is pressed in the hydraulic accumulator.Then, the pressure fluid of storage is subsequently as the power of realizing secondary function.
In an application, the invention discloses a kind of new mixed organization, this mechanism can store the energy of the plasticizing agent screw rod rotation that makes injection molding machinery of some electric notor outputs.The plastics of fusion are stored and be ejected into the screw rod of the axially reciprocating in the model, be connected with piston actuator.Link to each other with actuator with the pump that is connected of motor drive shaft of rotation,,, and this hydraulic fluid is sent in the air charged accumulator with high pressure from contraction actuator chamber pumping hydraulic fluid so that when screw retract.When screw rod was overhanging, pressure fluid passed through the throttle valve of the injection flow velocity of controlling the molten plastic flow model and flows back in the actuator.
Technological scheme
For the corresponding part in the disclosed embodiments, the reference character that has bracket on part or surface, only be the purpose unrestricted for explanation, generally, the invention provides a kind of make a load (11) relatively body (12) rotation and/modifying device (10) of axial motion.
Modifying device roughly comprises: a body; One is installed in the motor (13) on the body, and this motor has an exercisable output shaft (14), and this axle rotatablely moves the relative body of load; One piston (16) is installed on the body movably and this piston defines a variable capacity first chamber (19) with body, and exercisable piston is arranged to make the relative body of load to move vertically; One accumulator (23) is filled into a predetermined pressure; One fluid (as hydraulic fluid) is in first chamber and accumulator; One pump by motor driven (26) is discharged to accumulator with fluid from first chamber; And an exercisable valve (28), be set to when load will be overhanging, can selectively make the pressure fluid in the accumulator flow into first chamber, along a relative body shaft to direction promote piston and load.
In a preferred embodiment, motor is an electric notor, and piston and pump all are co-axially mounted on the motor output shaft.Fluid can be a hydraulic fluid, can be that keyway connects between piston and the motor output shaft.This keyway connects makes piston and load rotatably cooperate with motor output shaft, but the relative output shaft with load of piston can axially move.
The present invention also comprises a variable capacity second chamber (20) that is limited by piston and body.When the relative body of piston moves, the volume inverse variation in first and second chambeies.When the relative body of piston moved, the discharge capacity in first chamber was obviously big than second chamber, and the difference between two chambeies flows into accumulator or flows out from accumulator.Second chamber can be communicated with the fluid in the accumulator by valve, oppositely moves relative to body thereby promote piston selectively.Valve can be an electrohydraulic control, and load can be the screw rod of injection molding machinery.
Therefore, main purpose of the present invention provides a kind of modifying device that makes relative body rotation of load and/or axial motion.
Another object of the present invention provides a kind of relative body rotation of screw rod of injection molding machinery and/or modifying device of axial motion of making.
Purpose of these and other and advantage by reading specification, accompanying drawing and the dependent claims of front and back, become clearer.
Description of drawings
Fig. 1 is the schematic representation of modifying device.
Embodiment
At first, should be well understood to, identical in the accompanying drawings reference character is element, part or the surface of TYP structure all the time, and these elements, part or surface can be further described and be illustrated that this detailed description is the indispensable part of whole specification by whole specification.Unless other explanation is arranged, should read figure and specification (for example setting of hatching, parts, ratio, the number of degrees etc.) together, and figure is considered as the part of the whole specification of the present invention.Below the term of using in the specification " level ", " vertically ", " left side ", " right side ", " on " and the derivative words (i.e. " flatly " of D score and adjective and verb, " to the right ", " up " etc.), only be meant orientation when structure shown in certain figures is during towards the reader.Equally, term " inwardly " and " outwards " are often referred to the orientation of relative its longitudinal axis in surface or running shaft.
Now, as shown in the figure, the invention provides the modifying device that a kind of usefulness 10 is represented, body rotation and/or axial motion that the relative usefulness 12 of the load that this device controllably makes a usefulness 11 represent is represented.
Improved device roughly comprises: a motor 13, and be installed on the body and have an exercisable output shaft 14, this axle is configured such that the relative body of load rotatablely moves.Its Placement can be that keyway connects, and represents with dashed line 15.
Modifying device comprises that also one is installed in the piston 16 in the cylinder body 18 that forms in the body, and this piston and body define variable capacity first chamber 19 and variable capacity second chamber 20.Towards the piston area in first chamber 19 obviously than big towards the area of the piston in second chamber 20.Piston is used for catch bar 21, and this piston rod makes the relative body of load move vertically again.Its annexation schematically shows with dashed line 22.
The present invention also comprises the accumulator that a usefulness 23 is represented.Represented accumulator 23 is diaphragm types, and this accumulator has an air cavity 24 that is filled with a predetermined pressure.Shown in accumulator another chamber 25 is arranged.In chamber 25 and all pipelines and the chamber, all be full of suitable fluid, for example incompressible hydraulic fluid.
Device among the present invention also comprises a pump 26.In the device of preferred structure, piston and pump and the coaxial installation of motor output shaft are although this organization plan needn't be shown in the schematic representation shown in Figure 1.In fact, be that keyway connects between motor output shaft and the piston.
The present invention also comprises the electrohydraulic control that a usefulness 28 is represented.Represented servovalve 28 has an electric unit 29 and a hydraulic unit 30.Hydraulic unit is communicated with first chamber 19, is communicated with second chamber by pipeline 32 by pipeline 31.Pump is arranged in the branch road 33 that is communicated with pipeline 31,32.Another branch road 34 is communicated with pipeline 32 with accumulator fluid chamber 25.When the relative body of piston moves, the volume inverse change in first and second chambeies 19,20; Promptly when the volume in a chamber increased, the volume in another chamber reduced, and vice versa.
In fact, load 11 is plasticizing agent screw rods of injection molding machinery.Wish that relative body rotation of screw rod and/or relative body axially move.In order to reach this purpose,, make output shaft 14 rotations usually to the motor energising.Motor and load are rotated together along arrow 35.(be motor make load rotation) simultaneously, motor also make pump 26 work, this pump with fluid from first chamber 19, pass pipeline 31,33,34 and be pumped into accumulator chamber 25.At this moment, the state shown in valve is in.And some fluids of extracting out from first chamber turn back to second chamber 20 by pipeline 32.Therefore, when motor rotates, pump will be discharged to accumulator fluid chamber 25 from the net flow scale of construction (discharge capacity of promptly representing first and second chambeies is poor) in chamber, and at this, accumulator air cavity 24 constantly pressurizes.
Thereby operate this device screw rod is moved with any direction of load along relative body axis, this motion is schematically shown by double-head arrow 36.In this operation, motor is halted state normally.In time period in front, the relative body of piston moves right.Then, operation control valve makes hydraulic unit move to another position.Therefore, fluid flows to piston first chamber 19 from accumulator chamber 25 by pipeline 32, valve 28 and pipeline 31.Simultaneously, fluid can flow through pipeline 32 from piston second chamber 20 and converges with above-mentioned fluid.Therefore, this motion of valve makes the hydraulic fluid of pressurization flow into piston first chamber 19 from accumulator and from piston second chamber 20.Resemble when needs are discharged to plastics in the model, This move makes the relative cylinder of piston be moved to the left selectively, makes that the relative body of piston actuated load is overhanging.
When operating valve once more, make hydraulic unit get back to shown in during the position, fluid is pumped into second chamber and accumulator chamber 25 from the first actuator chamber, make the relative body withdrawal of piston (promptly moving right).
Therefore, the present invention roughly provides a kind of modifying device that optionally makes the relative body of load (for example screw conveyer machine of injection molding machinery) do rotation and/or axial motion.
Version
The present invention's anticipation can be made a lot of variations and modification.For example, the present invention is not limited to the screw type conveyer of mobile injection molding machinery.Therefore, this device is used in injection molding mechanically just for purposes of illustration, and the scope of unrestricted attached claim.This device also can be used on other device.In fact, load 11 can be regarded normal load as.Motor is electric notor preferably.Pump is by motor driven, but can adopt variable displacement if desired.If desired, accumulator can be film type or piston-and-the cylinder type.Also can use the accumulator of other pattern.Valve can be an electrohydraulic control, but is not limited thereto.In fact, the valve of other pattern can replaced and use.
Therefore, in the preferred styles of expression and explanation modifying device, also discussed several improved procedures, the various additional changes and improvements that those skilled in the art did do not depart from the spirit of the present invention that is limited and distinguished by following claims.
Claims (12)
1. one kind makes the relative body of a load do the rotation and the device of axial motion, comprises:
One body;
One motor is installed on the described body, and has an exercisable output shaft, and this axle is configured such that the described relatively body of described load rotates;
One piston is installed on the described body movably, and this piston and described body limit a variable capacity first chamber, and exercisable described piston axially moves the described relatively body of described load;
One accumulator is filled into a predetermined pressure;
One fluid is in described first chamber and accumulator;
One pump by described motor driven, this exercisable described pump is discharged to described accumulator with fluid from described first chamber; And
One exercisable valve makes the pressure fluid in the described accumulator flow in described first chamber selectively, makes the direction motion vertically of the relative described body with load of described piston.
2. device according to claim 1 is characterized in that: described motor is an electric notor.
3. device according to claim 1 is characterized in that: described piston and the coaxial installation of described motor output shaft.
4. device according to claim 1 is characterized in that: described pump and the coaxial installation of described motor output shaft.
5. device according to claim 1 is characterized in that: described fluid is a hydraulic oil.
6. device according to claim 1 is characterized in that: also comprise a keyway between described piston and motor output shaft and connect.
7. device according to claim 1 is characterized in that: also comprise variable capacity second chamber that limits by described piston and body, wherein, and when the described relatively body motion of described piston, the volume inverse variation in described first and second chambeies.
8. device according to claim 7 is characterized in that: when the described relatively body of described piston moved, the discharge capacity in described first chamber was bigger than described second chamber.
9. device according to claim 7 is characterized in that: the fluid in described second chamber and the described accumulator is communicated with, and moves along the opposite direction of described relatively body thereby promote described piston.
10. device according to claim 9 is characterized in that: described second chamber is communicated with by the interior fluid of described valve and described accumulator.
11. device according to claim 1 is characterized in that: described valve is an electrohydraulic control.
12. device according to claim 1 is characterized in that: described load is the screw rod of injection molding machinery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021504598A CN1500614A (en) | 2002-11-13 | 2002-11-13 | Mixed actuator of single motor pressed jet and spiral drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021504598A CN1500614A (en) | 2002-11-13 | 2002-11-13 | Mixed actuator of single motor pressed jet and spiral drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1500614A true CN1500614A (en) | 2004-06-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021504598A Pending CN1500614A (en) | 2002-11-13 | 2002-11-13 | Mixed actuator of single motor pressed jet and spiral drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1500614A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104302458A (en) * | 2012-01-26 | 2015-01-21 | 赫斯基注塑系统有限公司 | Screw-moving assembly including screw-moving actuator and bias-adjustment mechanism |
| CN108691827A (en) * | 2017-04-07 | 2018-10-23 | 丹佛斯动力系统公司 | Hydraulic pressure unit |
-
2002
- 2002-11-13 CN CNA021504598A patent/CN1500614A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104302458A (en) * | 2012-01-26 | 2015-01-21 | 赫斯基注塑系统有限公司 | Screw-moving assembly including screw-moving actuator and bias-adjustment mechanism |
| CN104302458B (en) * | 2012-01-26 | 2016-10-05 | 赫斯基注塑系统有限公司 | Including screw rod-motion actuators and the screw rod-moving parts of biasing guiding mechanism |
| CN108691827A (en) * | 2017-04-07 | 2018-10-23 | 丹佛斯动力系统公司 | Hydraulic pressure unit |
| CN108691827B (en) * | 2017-04-07 | 2020-10-30 | 丹佛斯动力系统公司 | Hydraulic unit |
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| C06 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |