CN106476273A - A kind of double printhead linkage liftings of FDM machine gear drive commutation - Google Patents
A kind of double printhead linkage liftings of FDM machine gear drive commutation Download PDFInfo
- Publication number
- CN106476273A CN106476273A CN201610854576.3A CN201610854576A CN106476273A CN 106476273 A CN106476273 A CN 106476273A CN 201610854576 A CN201610854576 A CN 201610854576A CN 106476273 A CN106476273 A CN 106476273A
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- screw
- base plate
- nut body
- printing head
- guide rail
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- 238000007639 printing Methods 0.000 claims abstract description 63
- 238000009434 installation Methods 0.000 claims abstract description 33
- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 230000008878 coupling Effects 0.000 claims description 21
- 238000010168 coupling process Methods 0.000 claims description 21
- 238000005859 coupling reaction Methods 0.000 claims description 21
- 239000007921 spray Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000004044 response Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 6
- 238000010146 3D printing Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Coating Apparatus (AREA)
- Common Mechanisms (AREA)
Abstract
The invention discloses a kind of double printhead linkage liftings of FDM machine gear drive commutation, including base plate, it is respectively arranged with vertical guide rail slide block mechanism in the left and right sides of base plate, right side printing head installation base plate and left side printing head installation base plate are fixedly installed respectively on the slide block of each guide rail slide block mechanism；The lower end of right side printing head installation base plate and left side printing head installation base plate has been respectively fixedly connected with printing head；Left thick stick nut body and the right screw-nut body that two width are parallel to each other is provided between two guide rail slide block mechanisms on base plate；The present invention passes through to adjust motor-driven gear, so that two meshed gears is rotated simultaneously, thus driving left screw-nut body and right screw-nut body, the line slideway auxiliary realized by guide rail slide block mechanism is so that the lifting of left and right sides printing head Coupled motion.Using by geared reverser, advantage is that response is fast to the present invention, and kinematic accuracy is high, and mechanism is succinct simultaneously, it is easy to accomplish.
Description
Technical field
The invention belongs to increases material manufacturing technology field, it is related to a kind of pair of printhead linkage lifting, especially a kind of FDM
Double printhead linkage liftings of machine gear drive commutation.
Background technology
3D printing is being commonly called as of increases material manufacturing technology (AM, Additive Manufacturing).3D printing, entitled " beats
Print ", actually " manufactures ".In fact, in substantial amounts of english literature, 3D printing (3D Printing) is often referred to as 3D
Fabrication (3D manufacture), this more accurately describes the essence of 3D printing.FDM technology is Scott during the eighties in 20th century
Crump invention.After the patent obtaining this technology, he established Stratasys company in 1989.The technology of FDM is former
Reason：The thermoplastic of thread (diameter about 2mm) is heated fusing by shower nozzle, shower nozzle bottom carries minute nozzle (diameter one
As be 0.2～0.6mm).Material with certain pressure squeeze gush out, shower nozzle moves in the horizontal direction simultaneously, the material of extrusion with
Previous aspect clinkering is together.After the completion of one aspect deposition, table vertical declines the thickness of a layer, is further continued for melting
Deposition, until complete whole solid modelling.
The FDM printing device with double printing heads on the market at present, between generally existing printing head and drip molding
Scratch and interference problem.In forming process, when a printing head executes one section of print routine in both given layers, because of two
The height of shower nozzle is consistent substantially, once there is the projection having already formed material on operating path or burr, may result in
Interfere between idle nozzle and drip molding, whole drip molding is departed from substrate by the serious shower nozzle that will lead to, and leads to print
Failure.
It is proposed that " single-motor double shower nozzle 3D printer shower head mechanism " (patent No. CN201310422519.4) send out
Bright patent.It is mainly a kind of single-motor double shower nozzle 3D printer driving two shower nozzles to carry out double-colored printing by a motor
Shower head mechanism.But this scheme solves the problems, such as that two shower nozzles may be interfered.
Thus it is guaranteed that when double nozzle printing machines print, idle nozzle is not interfered with printing-forming part, ensure simultaneously again
That changes back and forth between two shower nozzles is smooth and convenient, and a kind of pair of printhead linkage lifting of design has highly important meaning
Justice.
Content of the invention
It is an object of the invention to overcoming the shortcoming of above-mentioned prior art, provide a kind of the double of FDM machine gear drive commutation
Printhead linkage lifting, it can achieve the automatic switchover of double printheads, realizes the compound preparation of bi-material layers, and ensures to shape
During idle shower nozzle do not occur to scratch with printout or interfere, effectively improve drip molding qualification rate.
The purpose of the present invention is achieved through the following technical solutions：
Double printhead linkage liftings of this FDM machine gear drive commutation, including base plate, in the left and right sides of base plate
It is respectively arranged with vertical guide rail slide block mechanism, right side is fixedly installed respectively on the slide block of each guide rail slide block mechanism and beats
Print shower nozzle installation base plate and left side printing head installation base plate；Described right side printing head installation base plate and left side printing head peace
The lower end of dress substrate has been respectively fixedly connected with printing head；Base plate is provided with two width between two guide rail slide block mechanisms mutual
Parallel left thick stick nut body and right screw-nut body, the screw slider of left screw-nut body is installed with left side printing head
Substrate is fixedly connected；The screw slider of right screw-nut body is fixedly connected with right side printing head installation base plate；Described left silk
The upper end of the leading screw in thick stick nut body and right screw-nut body is separately installed with pitch wheel, one of gear
Adjustment motor is connected with by shaft coupling；By adjusting motor-driven gear, so that two meshed gears is rotated, thus driving simultaneously
The line slideway auxiliary of move left screw-nut body and right screw-nut body, being realized by guide rail slide block mechanism is so that the left and right sides
Printing head Coupled motion lifts.
Above-mentioned adjustment motor is fixed on base plate by motor cabinet.
The two ends of the leading screw in above-mentioned left and right screw-nut body are by the bearing block, bearing and the axle that are fixed on base plate
Bearing bolt and nut is installed；Described bearing is deep groove ball bearing, angular contact ball bearing or taper roll bearing；Described bearing block
For bearing seat with spherical outside surface, vertical shaft bearing or precision ball screw bearing block.
Screw slider in above-mentioned left thick stick nut body and right screw-nut body is fixedly connected with feed screw nut, and leading screw is slided
Block and feed screw nut are together set on leading screw.
Above-mentioned leading screw includes the left side ball-screw being arranged in left screw-nut body and is arranged on right feed screw nut machine
Right side ball-screw in structure.
Above-mentioned adjustment motor is motor or servomotor.
Above-mentioned shaft coupling is positive coupling, yielding coupling, plum coupling or diaphragm coupling.
Said gear is straight-tooth gear, angular gear, curved tooth gear or positive and negative profile modified gear.
Feed screw nut in above-mentioned left screw-nut body or right screw-nut body is bent-tube boiler, circulator's formula or end cap
Formula nut.
Above-mentioned guide rail slide block mechanism is made up of guide rail slide block and guide rail, and described guide rail selects square ball line slideway, double
Shaft core roller line slideway or single shaft core line slideway.
The invention has the advantages that：
The present invention makes two printing head linkage liftings by gear drive and ball-screw-transmission and line slideway.
When adjustment motor drives right side ball-screw to rotate clockwise by shaft coupling, so that right side feed screw nut moves up,
Also just right side printing head is driven integrally to move up by right side printhead installation base plate；Meanwhile, it is fixed on right side ball wire
Gear on thick stick and the gear being fixed on the ball-screw of left side form engaged transmission, thus driving left side ball-screw counterclockwise
Rotate, further so that left side feed screw nut moves down, also just drive left side to beat by left side printing head installation base plate
Print shower nozzle integrally moves down.So, left and right sides printing head just can link lifting.
The linkage that the present invention adopts is aimed at whole printing head.If doing linkage lifting just for nozzle, can produce
Having some setbacks of silk material supply, even results in printing silk material interruption.During original state, the height of two printing heads is not consistent, needs
Ensure one high and one low, when needing to change printing head, change the relative altitude position of two printing heads by adjusting motor.Adjustment
Motor drive signal is coordinated with print routine it is ensured that idle shower nozzle and printout do not occur to scratch or dry in FDM forming process
Relate to, drip molding qualification rate can be effectively improved.
In sum, using by geared reverser, advantage is that response is fast to the present invention, and kinematic accuracy is high, simultaneously
Mechanism is succinct, it is easy to accomplish.Have the advantage that：
1st, the composite printing of bi-material can be realized.
2nd, can work, automatic switchover under print routine control for the spare bits, conversion station response is fast, can effectively solving
Interference problem.
3rd, the control of motor corner can be passed through, realize the regulation of avoidance height, carry out efficiency optimization design.
Brief description
Fig. 1 is the overall structure figure of the present invention；
Fig. 2 is the front view of Fig. 1；
Fig. 3 is the right view of Fig. 1.
In figure, 1. adjusts motor, 2. motor cabinet, 3. shaft coupling, 4. gear, 5. bearing block, 6. bearing, 7. right side ball wire
Thick stick, 8. screw slider, 9. feed screw nut, 10. right side printing head installation base plate, 11. guide rail slide blocks, 12. guide rails, on the left of in the of 13.
Ball-screw, 14. left side printing head installation base plates, 15. printing heads, 16. base plates, 17. printing head installation base plate screws,
18. screw slider screws, 19. guide rail bolt and nuts, 20. bearing block bolt nuts, 21. round nuts, 22. holding screws, 23. electricity
Support installation bolt nut, 24. motor mounting screws.
Specific embodiment
Double printhead linkage liftings of the FDM machine gear drive commutation of the present invention, including base plate 16, in base plate 16
The left and right sides is respectively arranged with vertical guide rail slide block mechanism, is fixedly installed respectively on the slide block of each guide rail slide block mechanism
There are right side printing head installation base plate 10 and left side printing head installation base plate 14；Described right side printing head installation base plate 10 He
The lower end of left side printing head installation base plate 14 is fixedly connected with printing head by printing head installation base plate screw 17 respectively
15；Left thick stick nut body and the right feed screw nut that two width are parallel to each other is provided between two guide rail slide block mechanisms on base plate 16
Mechanism, the screw slider 8 of left screw-nut body is fixedly connected with left side printing head installation base plate 14；Right screw-nut body
Screw slider 8 be fixedly connected with right side printing head installation base plate 10；Described left screw-nut body and right feed screw nut machine
The upper end of the leading screw in structure is separately installed with pitch wheel 4, and one of gear 4 is connected with adjustment by shaft coupling 3
Motor 1；By adjusting motor 1 driving gear 4, so that two meshed gears 4 is rotated, thus driving left screw-nut body simultaneously
With right screw-nut body, the line slideway auxiliary realized by guide rail slide block mechanism is so that left and right sides printing head 15 is overall joins
Dynamic lifting.Adjustment motor 1 is fixed on base plate 16 by motor cabinet 2.The two ends of the leading screw in left and right screw-nut body are passed through
The bearing block 5, bearing 6 and the bearing block bolt nut 20 that are fixed on base plate 16 are installed；Described bearing 6 is deep groove ball bearing, angle
Contact ball bearing or taper roll bearing；Described bearing block 5 is bearing seat with spherical outside surface, vertical shaft bearing or precise ball silk
Thick stick bearing block.Screw slider 8 in left thick stick nut body and right screw-nut body is fixedly connected with feed screw nut 9, and leading screw is slided
Block 8 and feed screw nut 9 are together set on leading screw.Leading screw includes the left side ball-screw 13 being arranged in left screw-nut body
With the right side ball-screw 7 being arranged in right screw-nut body.
In the preferred embodiment：Adjustment motor 1 is motor or servomotor.Shaft coupling 3 is that rigidity joins
Axial organ, yielding coupling, plum coupling or diaphragm coupling.Gear 4 be straight-tooth gear, angular gear, curved tooth gear or
Positive and negative profile modified gear.Feed screw nut 9 in left screw-nut body or right screw-nut body is bent-tube boiler, circulator's formula or end
Lid formula nut.Guide rail slide block mechanism is made up of guide rail slide block 11 and guide rail 12, described guide rail 12 select square ball line slideway,
Twin shaft core roller line slideway or single shaft core line slideway.
The left side printing head installation base plate 14 of the present invention and right side printing head installation base plate 10 are T-type structure, and it is dashed forward
The part going out is fixedly connected with screw slider 8 by screw slider screw 18.Guide rail spiral shell is passed through at the two ends of the guide rail 12 of the present invention
Bolt nut 19 is fixedly mounted on base plate 16.Left side ball-screw 13 and right side ball-screw 7 upper end pass through round nut respectively
22 fix two gears 4.Holding screw 22 is provided with shaft coupling 3.It is solid that motor cabinet 2 passes through motor cabinet installation bolt nut 23
It is scheduled on base plate 16, adjustment motor 1 is fixed on motor cabinet 2 by motor mounting screw 24.
Below in conjunction with the accompanying drawings the present invention is described in further detail：
Referring to Fig. 1,2,3, when the motor shaft of present invention adjustment motor 1 turns clockwise, and for mounting and adjusting motor 1
Motor cabinet 2, connects the shaft coupling 3 of adjustment motor 1 and right side ball-screw 7, and right side ball-screw passes through bearing 6 and bearing block 5
It is arranged on base plate 16, right side feed screw nut 9- is right, right side screw slider 8- is right, right rail slide block 11- is right, right side prints spray
Head installation base plate 10 and the printing head 15- right side are fixed on one by screw slider screw 18, printing head installation base plate screw 17
Rise, thus the rotary motion of motor shaft is converted to the shifting upwards of printing head by ball screw assembly, and line slideway auxiliary
Dynamic.Meanwhile, the gear 4- gear 4- left-handed form that is right and being fixed on the ball-screw 13 of left side being fixed on the ball-screw 7 of right side becomes
Engaged transmission, thus drive left side ball-screw 13 to rotate counterclockwise, further so that left side feed screw nut 9- left-hand moves down
Dynamic, also just drive the left side left entirety of printing head 15- to move down by left side printing head installation base plate 14.So, left and right
Side printing head 15 just can link lifting.
The united needle that the present invention adopts is for whole printing head.If doing linkage lifting, nozzle and silk material just for nozzle
Between can produce relative motion.Nozzle causes certain stretching or compression to silk material, can produce having some setbacks, very of silk material supply
It is interrupted to leading to printing silk material.During original state the height of two printing heads not consistent it is ensured that certain altitude is poor, need turn
When changing printing head, change the relative altitude position of two printing heads by adjusting motor.In whole process, turning between shower nozzle
Program of changing needs to be consistent with adjustment motor drive signal, to ensure the smooth and accurate of switching motion.
The present invention using by by right side gear 4- right with the left meshed transmission gear mechanism constituting of left side gear 4-, by ball
The ball-screw-transmission that leading screw 7 feed screw nut, 9 screw slider 8 is constituted is secondary, led by the straight line that guide rail slide block 11 and guide rail 12 are constituted
Rail is secondary so that left and right sides printing head 15 Coupled motion lifts, and advantage is that response is fast, and kinematic accuracy is high, simultaneously mechanism's letter
It is clean, it is easy to accomplish.
Claims (10)
1. a kind of double printhead linkage liftings of FDM machine gear drive commutation are it is characterised in that inclusion base plate (16),
The left and right sides of base plate (16) is respectively arranged with vertical guide rail slide block mechanism, divides on the slide block of each guide rail slide block mechanism
It is not fixedly installed right side printing head installation base plate (10) and left side printing head installation base plate (14)；Described right side prints spray
The lower end in head installation base plate (10) and left side printing head installation base plate (14) has been respectively fixedly connected with printing head (15)；The bottom of at
Left thick stick nut body and the right screw-nut body that two width are parallel to each other is provided between two guide rail slide block mechanisms on plate (16),
The screw slider (8) of left screw-nut body is fixedly connected with left side printing head installation base plate (14)；Right screw-nut body
Screw slider (8) be fixedly connected with right side printing head installation base plate (10)；Described left screw-nut body and right leading screw spiral shell
The upper end of the leading screw in parent agency is separately installed with pitch wheel (4), and one of gear (4) passes through shaft coupling (3)
It is connected with adjustment motor (1)；
By adjusting motor (1) driving gear (4), so that two meshed gears (4) is rotated, thus driving left feed screw nut simultaneously
Mechanism and right screw-nut body, the line slideway auxiliary realized by guide rail slide block mechanism are so that left and right sides printing head (15)
Coupled motion lifts.
2. FDM machine gear drive according to claim 1 commutation double printhead linkage liftings it is characterised in that
Described adjustment motor (1) is fixed on base plate (16) by motor cabinet (2).
3. FDM machine gear drive according to claim 1 commutation double printhead linkage liftings it is characterised in that
The two ends of the leading screw in described left and right screw-nut body by the bearing block (5) that is fixed on base plate (16), bearing (6) and
Bearing block bolt nut (20) is installed；Described bearing (6) is deep groove ball bearing, angular contact ball bearing or taper roll bearing；
Described bearing block (5) is bearing seat with spherical outside surface, vertical shaft bearing or precision ball screw bearing block.
4. FDM machine gear drive according to claim 1 commutation double printhead linkage liftings it is characterised in that
Screw slider (8) in described left thick stick nut body and right screw-nut body is fixedly connected with feed screw nut (9), screw slider
(8) together it is set on leading screw with feed screw nut (9).
5. FDM machine gear drive according to claim 1 commutation double printhead linkage liftings it is characterised in that
Described leading screw includes the left side ball-screw (13) being arranged in left screw-nut body and is arranged in right screw-nut body
Right side ball-screw (7).
6. FDM machine gear drive according to claim 1 commutation double printhead linkage liftings it is characterised in that
Described adjustment motor (1) is motor or servomotor.
7. FDM machine gear drive according to claim 1 commutation double printhead linkage liftings it is characterised in that
Described shaft coupling (3) is positive coupling, yielding coupling, plum coupling or diaphragm coupling.
8. FDM machine gear drive according to claim 1 commutation double printhead linkage liftings it is characterised in that
Described gear (4) is straight-tooth gear, angular gear, curved tooth gear or positive and negative profile modified gear.
9. double printhead linkage liftings of the FDM machine gear drive commutation according to claim 1 or 4, its feature exists
In the feed screw nut (9) in described left screw-nut body or right screw-nut body is bent-tube boiler, circulator's formula or end cover type
Nut.
10. double printhead linkage liftings of the FDM machine gear drive commutation according to claim 1 or 4, its feature exists
In described guide rail slide block mechanism is made up of guide rail slide block (11) and guide rail (12), and described guide rail (12) selects square ball straight line
Guide rail, twin shaft core roller line slideway or single shaft core line slideway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610854576.3A CN106476273B (en) | 2016-09-27 | 2016-09-27 | A kind of double print head linkage liftings of FDM machine gear drive commutation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610854576.3A CN106476273B (en) | 2016-09-27 | 2016-09-27 | A kind of double print head linkage liftings of FDM machine gear drive commutation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106476273A true CN106476273A (en) | 2017-03-08 |
| CN106476273B CN106476273B (en) | 2019-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610854576.3A Expired - Fee Related CN106476273B (en) | 2016-09-27 | 2016-09-27 | A kind of double print head linkage liftings of FDM machine gear drive commutation |
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| Country | Link |
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| CN (1) | CN106476273B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159890A (en) * | 2017-07-20 | 2017-09-15 | 华东理工大学 | A kind of working cylinder and table top changing method of variable table top scope |
| CN108593257A (en) * | 2018-06-26 | 2018-09-28 | 天津商业大学 | A kind of monoblock type liftable push-plate type wave simulator |
| CN108790143A (en) * | 2018-06-13 | 2018-11-13 | 上海应用技术大学 | A kind of continuous type piston type squeezes out ejecting device and its application method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103465633A (en) * | 2013-09-17 | 2013-12-25 | 长春市明威科技有限公司 | Single-motor double printer head 3D printer head mechanism |
| WO2015081597A1 (en) * | 2013-12-04 | 2015-06-11 | 北京太尔时代科技有限公司 | Multi-nozzle 3d printer |
| DE102014109246A1 (en) * | 2014-07-02 | 2016-01-07 | Michael Schillinger | Extruder arrangement for a 3D printer |
| CN105291436A (en) * | 2015-11-18 | 2016-02-03 | 青岛尤尼科技有限公司 | Double-wire printing head of 3D printer and switching control method of double-wire printing head |
| CN105538730A (en) * | 2016-03-03 | 2016-05-04 | 深圳市蓝谷维奇科技有限公司 | Automatic exchange device for color extrusion systems of 3D printer |
-
2016
- 2016-09-27 CN CN201610854576.3A patent/CN106476273B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103465633A (en) * | 2013-09-17 | 2013-12-25 | 长春市明威科技有限公司 | Single-motor double printer head 3D printer head mechanism |
| WO2015081597A1 (en) * | 2013-12-04 | 2015-06-11 | 北京太尔时代科技有限公司 | Multi-nozzle 3d printer |
| DE102014109246A1 (en) * | 2014-07-02 | 2016-01-07 | Michael Schillinger | Extruder arrangement for a 3D printer |
| CN105291436A (en) * | 2015-11-18 | 2016-02-03 | 青岛尤尼科技有限公司 | Double-wire printing head of 3D printer and switching control method of double-wire printing head |
| CN105538730A (en) * | 2016-03-03 | 2016-05-04 | 深圳市蓝谷维奇科技有限公司 | Automatic exchange device for color extrusion systems of 3D printer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159890A (en) * | 2017-07-20 | 2017-09-15 | 华东理工大学 | A kind of working cylinder and table top changing method of variable table top scope |
| CN108790143A (en) * | 2018-06-13 | 2018-11-13 | 上海应用技术大学 | A kind of continuous type piston type squeezes out ejecting device and its application method |
| CN108790143B (en) * | 2018-06-13 | 2022-04-01 | 上海应用技术大学 | Piston type extrusion nozzle device capable of continuously working and using method thereof |
| CN108593257A (en) * | 2018-06-26 | 2018-09-28 | 天津商业大学 | A kind of monoblock type liftable push-plate type wave simulator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106476273B (en) | 2019-02-05 |
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