CN108248013A - A kind of pneumatic screw compound extruded system for direct write molding 3D printing - Google Patents
A kind of pneumatic screw compound extruded system for direct write molding 3D printing Download PDFInfo
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- CN108248013A CN108248013A CN201810265272.2A CN201810265272A CN108248013A CN 108248013 A CN108248013 A CN 108248013A CN 201810265272 A CN201810265272 A CN 201810265272A CN 108248013 A CN108248013 A CN 108248013A
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- cavity
- extrusion
- barrel
- piston
- direct write
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- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
Abstract
The invention discloses a kind of pneumatic screw compound extruded systems for direct write molding 3D printing equipment, including pneumatic feed systems and mechanical extrusion system, pneumatic feed systems mainly include barrel, piston, air compressor, air inlet pipe and barrel lid, piston is built in barrel, and the peripheral surface of piston is close to material tube inner wall face, barrel is divided into air cavity and material cavity by piston, the end of the air cavity is equipped with barrel lid, the material cavity inner stuffing material, and the material outlet connected with mechanical extrusion system is offered in the end of material cavity；The outlet of the air compressor is connected with the entrance of air inlet pipe, and the outlet of air inlet pipe is connected across barrel lid with air cavity；Mechanical extrusion system includes extrusion cavity, nozzle, feeding spiro rod and motor.Beneficial effects of the present invention are：The extrusion of material is directly realized by by the feeding spiro rod rotated, and extruded velocity is uniform, extrusion action can quick-speed interruption and quick pumpback, be easily achieved program control, can effectively avoid the problem that from nozzle squeeze out bubble.
Description
Technical field
The present invention relates to 3D printing technique fields, and in particular to a kind of pneumatic screw for direct write molding 3D printing is compound
Extrusion system.
Background technology
Direct write forming technique (DIW, Direct Ink Writing) is an important branch of 3D printing technique, in
The 1980s middle and later periods in age is invented by American scientist, with other 3D printing techniques such as fusion sediment moulding (FDM), stereolithography
(SLA), selective laser sintering (SLS) is almost what contemporaneity grew up.By the development of more than 30 years, direct write molding skill
Art is in materials such as structural ceramics, piezoelectric ceramics, catalysis material, photonic crystal, bio-compatible material, metal material, clay, china clay
The three-dimensional structure preparation aspect of material has been widely used and significant progress.
In the prior art, it is mostly to reequip to obtain on the basis of original FDM printers for the equipment of direct write forming technique
, also there is a few experiments room (such as Tsinghua University Lee Asian Games et al.) autonomous Design direct write former.The molding of these direct writes is set
Standby mechanical structure has larger difference, but extrusion structure can be divided into two categories below substantially：1) pneumatic type list squeezes out structure.It will
Compressed gas is passed through barrel, and compressed gas provides thrust and pushes piston, and suspension is made directly to be squeezed out from nozzle.This extrusion structure
Extruded velocity it is higher to the uniformity requirement of solid-liquid suspension phase content, when solid liquid phase content changes, suspension flow
Dynamic resistance changes therewith, under identical extrusion pressure, causes extruded velocity that can also change, solid in direct write forming process
Liquid segregation phenomenon (variation that can lead to solid liquid phase content) is difficult to avoid, and pneumatic type list, which squeezes out structure, generally has uniform squeeze out
The problem of speed is difficult to continue to maintain；In addition, since extrusion pressure is provided by compressed gas, extrusion action it is relatively difficult to achieve it is quick in
Disconnected, quick pumpback and program control.2) mechanical single extrusion structure.Extrusion pressure is provided by stepper motor, specifically, stepping
Motor rotates, and by the screw rod that is attached thereto by the linear motion that convert rotational motion is screw rod upper plug, plunger pushes barrel
In suspension directly from nozzle squeeze out or by squeezed out again by nozzle after one section of feed pipe (part squeeze out structure in barrel
It is separated from each other with nozzle, is connected by a feed pipe), this kind of extrusion system can provide the extruded velocity of continuous uniform, squeeze out
Pressure is provided by stepper motor, is also convenient for controlling into line program, but quick-speed interruption and the less effective of quick pumpback；Meanwhile by
In suspension before nozzle extrusion, the gas that when filler is mixed in barrel does not have the space of spilling, inevitably can only be from
Nozzle squeezes out, this is to squeeze out bubble phenomenon from nozzle, this phenomenon gently then causes extrusion temporarily to interrupt local print track
The filling of no material, it is heavy then cause a devastating effect to molding blank and blank deformation is caused even to cave in.
Invention content
It is an object of the present invention in view of the deficiencies of the prior art, provide the use that a kind of extruded velocity is uniform, monitors in real time
In the pneumatic screw compound extruded system of direct write molding 3D printing.
The technical solution adopted by the present invention is：A kind of pneumatic screw compound extruded system for direct write molding 3D printing equipment
System, including pneumatic feed systems and mechanical extrusion system, pneumatic feed systems mainly include barrel, piston, air compressor, into
Tracheae and barrel lid, piston is built in barrel, and the peripheral surface of piston is close to material tube inner wall face, and barrel is divided into gas by piston
Chamber and material cavity, the end of the air cavity are equipped with barrel lid, the material cavity inner stuffing material, and open up in the end of material cavity
There is the material outlet connected with mechanical extrusion system；The outlet of the air compressor is connected with the entrance of air inlet pipe, air inlet pipe
Outlet connected across barrel lid with air cavity；Mechanical extrusion system includes extrusion cavity, nozzle, feeding spiro rod and motor, squeezes out
Cavity opens up charging hole, and charging hole is connected with the material outlet in pneumatic feed systems；The bottom of the extrusion cavity is equipped with spray
Mouth；The feeding spiro rod is built in extrusion cavity, and is adapted with extrusion cavity, and the upper end of feeding spiro rod is connected with motor.
By said program, the extrusion channel of the threaded line of feeding spiro rod and the inner wall formation material of extrusion cavity squeezes out logical
Road is whole in the shape of a spiral；The nozzle is set on the bottom for squeezing out channel.
By said program, the angle of thread of feeding spiro rod and the injection direction of nozzle are identical with the angle of vertical direction
By said program, feeding spiro rod is connected by shaft coupling with motor
By said program, the charging hole is opened in the side wall of extrusion cavity.
By said program, pressure regulator valve is configured in air inlet pipe.
Beneficial effects of the present invention are：
1st, the feeding of material is directly realized by by the feeding spiro rod rotated, and extruded velocity is uniform, and extrusion action is easy to implement journey
Sequence controls, and quick-speed interruption and quick pumpback effect are good.
2nd, the top of extrusion cavity and atmosphere, and material sprays the preceding feeding spiro rod that passes through from nozzle and is sent into this buffering
Stage, the gas being mixed in material can smoothly overflow, and can effectively avoid gas and directly extruded from nozzle, solve nozzle and squeeze
The problem of going out bubble ensure that the Forming Quality of printout.
3rd, the present invention be suitable for various organic polymer semisolid ointment materials, inorganic non-metallic semisolid ointment material or
Metal semi-solid ointment material and various wetting clay, the direct write molding of china clay, have wide range of applications.And to improve direct write into
The Forming Quality of type technology improves yields, production efficiency is kept to do a great deal of good.
Description of the drawings
Fig. 1 is the pneumatic feed systems schematic diagram of a specific embodiment of the invention.
Fig. 2 is the mechanical extrusion system schematic diagram of a specific embodiment of the invention.
Wherein：1st, air compressor；2nd, pressure regulator valve；3rd, air inlet pipe；4th, barrel lid；5th, piston；6th, material；7th, barrel；8、
Charging hole；9th, extrusion cavity；10th, feeding spiro rod；11st, nozzle；12nd, channel is squeezed out；13rd, shaft coupling；14th, motor.
Specific embodiment
For those skilled in the art is made to more fully understand technical scheme of the present invention, in the following with reference to the drawings and specific embodiments
The invention will be further described.
A kind of pneumatic screw compound extruded system for direct write molding 3D printing equipment as shown in Figure 1, including pneumatic
Feed system and mechanical extrusion system, wherein, pneumatic feed systems mainly include barrel 7, piston 5, air compressor 1, pressure regulation
Valve 2, air inlet pipe 3, barrel lid 4, as shown in Figure 1, piston 5 is built in barrel 7, and the peripheral surface of piston 5 and 7 internal face of barrel are tight
Barrel 7 is divided into air cavity and material cavity by patch, piston 5, and the end of the air cavity is equipped with barrel lid 4, is filled in the material cavity
Material 6, and the material outlet connected with mechanical extrusion system is offered in the end of material cavity；The air compressor 1 goes out
Mouth is connected with the entrance of air inlet pipe 3, and the outlet of air inlet pipe 3 connects with air cavity across barrel lid 4, pressure regulation is configured in air inlet pipe 3
Valve 2；Mechanical extrusion system includes extrusion cavity 9, feeding spiro rod 10, motor 14, nozzle 11, shaft coupling 13, the side of extrusion cavity 9
Open up charging hole 8 on wall, charging hole 8 connected with the material outlet in pneumatic feed systems (can be by fittings, also can be two
Pass through fittings again after adding one section of feed pipe between person)；The bottom of the extrusion cavity 9 is equipped with nozzle 11；The feeding
Screw rod 10 is built in extrusion cavity 9, and is adapted with extrusion cavity 9, and the upper end of feeding spiro rod 10 passes through shaft coupling 13 and motor
14 are connected；The angle of thread of feeding spiro rod 10 and the injection direction of nozzle 11 are identical with the angle of vertical direction.
In the present embodiment, the threaded line of feeding spiro rod 10 forms the extrusion channel 12 of material with the inner wall of extrusion cavity 9, should
It is whole in the shape of a spiral to squeeze out channel 12, the nozzle 11 is set on the bottom for squeezing out channel 12.
In the present embodiment, air compressor 1, it is also possible to which other device such as compressed gas cylinders that can provide compressed gas substitute.
The air compressor 1 and pressure regulator valve 2 are used cooperatively, and the high pressure gas of the stable and adjustable atmospheric pressure value of output pressure exports gas
Pressure value ranging from 0.1~1Mpa.
The present invention operation principle be：The high pressure gas that air compressor 1 in pneumatic feed systems exports is through pressure regulator valve 2
With air inlet pipe 3 into the air cavity of feeding cylinder 7, piston 5 is pushed to move, so as to the material 6 of pressing materials intracavitary, makes material 6 from object
Expect the material outlet output of chamber, and enter the extrusion channel 12 of mechanical extrusion system through charging hole 8；Motor 14 drives feeding spiro rod
10 rotations squeeze out the material 6 in channel 12 and extrusion channel 12 are sent under the drive of the concentric rotational movement of feeding spiro rod 10
Bottom, and squeezed out from nozzle 11.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for the technology of this field
For personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equally replace, improving etc., it should all be within protection scope of the present invention.
Claims (6)
1. it is a kind of for direct write molding 3D printing equipment pneumatic screw compound extruded system, which is characterized in that including pneumatically into
Material system and mechanical extrusion system, pneumatic feed systems mainly include barrel, piston, air compressor, air inlet pipe and barrel lid,
Piston is built in barrel, and the peripheral surface of piston is close to material tube inner wall face, and barrel is divided into air cavity and material cavity by piston, institute
The end for stating air cavity is equipped with barrel lid, the material cavity inner stuffing material, and offer in the end of material cavity and squeezed out with machinery
The material outlet of system connectivity；The entrance of the outlet air inlet pipe of the air compressor, the outlet of air inlet pipe is across barrel
Lid is connected with air cavity；Mechanical extrusion system includes extrusion cavity, nozzle, feeding spiro rod and motor, and extrusion cavity opens up charging hole,
Charging hole is connected with the material outlet in pneumatic feed systems；The bottom of the extrusion cavity connects a nozzle；The feeding
Screw rod is built in extrusion cavity, and is adapted with extrusion cavity, and the upper end of feeding spiro rod is connected with motor.
2. as described in claim 1 for the pneumatic screw compound extruded system of direct write molding 3D printing equipment, feature exists
In it is whole in the shape of a spiral to squeeze out channel for the extrusion channel of the threaded line of feeding spiro rod and the inner wall formation material of extrusion cavity；Institute
It states nozzle and is set on the bottom for squeezing out channel.
3. as claimed in claim 2 for the pneumatic screw compound extruded system of direct write molding 3D printing equipment, feature exists
In the angle of thread of feeding spiro rod and the injection direction of nozzle are identical with the angle of vertical direction.
4. as described in claim 1 for the pneumatic screw compound extruded system of direct write molding 3D printing equipment, feature exists
In feeding spiro rod is connected by shaft coupling with motor.
5. as described in claim 1 for the pneumatic screw compound extruded system of direct write molding 3D printing equipment, feature exists
In the charging hole is opened in the side wall of extrusion cavity.
6. as described in claim 1 for the pneumatic screw compound extruded system of direct write molding 3D printing equipment, feature exists
In being configured with pressure regulator valve in air inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810265272.2A CN108248013A (en) | 2018-03-28 | 2018-03-28 | A kind of pneumatic screw compound extruded system for direct write molding 3D printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810265272.2A CN108248013A (en) | 2018-03-28 | 2018-03-28 | A kind of pneumatic screw compound extruded system for direct write molding 3D printing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108248013A true CN108248013A (en) | 2018-07-06 |
Family
ID=62747592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810265272.2A Pending CN108248013A (en) | 2018-03-28 | 2018-03-28 | A kind of pneumatic screw compound extruded system for direct write molding 3D printing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108248013A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112917900A (en) * | 2021-01-21 | 2021-06-08 | 四川大学 | Air pressure formula fused deposition type 3D prints shower nozzle |
| CN113426464A (en) * | 2021-07-09 | 2021-09-24 | 浙江大学 | Ink direct-writing type 3D printing device of ceramic-based catalyst carrier and manufacturing method |
| CN113512395A (en) * | 2021-03-19 | 2021-10-19 | 广西藤县通轩立信化学有限公司 | Hot melt adhesive for 3D printing |
| CN117301474A (en) * | 2023-11-30 | 2023-12-29 | 河北新欧汽车零部件科技有限公司 | Composite material chute co-extrusion device |
| GB2623067A (en) * | 2022-09-30 | 2024-04-10 | Orbital Matter Ug | 3D printing apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105818245A (en) * | 2016-05-24 | 2016-08-03 | 邱瀚仡 | Output device for ceramic 3D printer |
| CN206663461U (en) * | 2017-03-30 | 2017-11-24 | 郑州科技学院 | Ceramic 3D printing pen |
-
2018
- 2018-03-28 CN CN201810265272.2A patent/CN108248013A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105818245A (en) * | 2016-05-24 | 2016-08-03 | 邱瀚仡 | Output device for ceramic 3D printer |
| CN206663461U (en) * | 2017-03-30 | 2017-11-24 | 郑州科技学院 | Ceramic 3D printing pen |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112917900A (en) * | 2021-01-21 | 2021-06-08 | 四川大学 | Air pressure formula fused deposition type 3D prints shower nozzle |
| CN113512395A (en) * | 2021-03-19 | 2021-10-19 | 广西藤县通轩立信化学有限公司 | Hot melt adhesive for 3D printing |
| CN113426464A (en) * | 2021-07-09 | 2021-09-24 | 浙江大学 | Ink direct-writing type 3D printing device of ceramic-based catalyst carrier and manufacturing method |
| GB2623067A (en) * | 2022-09-30 | 2024-04-10 | Orbital Matter Ug | 3D printing apparatus |
| CN117301474A (en) * | 2023-11-30 | 2023-12-29 | 河北新欧汽车零部件科技有限公司 | Composite material chute co-extrusion device |
| CN117301474B (en) * | 2023-11-30 | 2024-02-06 | 河北新欧汽车零部件科技有限公司 | Composite material chute co-extrusion device |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20180706 |