CN109514853A - A kind of DLP laser fast shaping 3D printer shield being conveniently replaceable - Google Patents
A kind of DLP laser fast shaping 3D printer shield being conveniently replaceable Download PDFInfo
- Publication number
- CN109514853A CN109514853A CN201811597889.0A CN201811597889A CN109514853A CN 109514853 A CN109514853 A CN 109514853A CN 201811597889 A CN201811597889 A CN 201811597889A CN 109514853 A CN109514853 A CN 109514853A
- Authority
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- China
- Prior art keywords
- shield
- hook
- support
- box body
- fixedly connected
- 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
Links
- 238000007493 shaping process Methods 0.000 title claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/38—Housings, e.g. machine housings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/10—Formation of a green body
- B22F10/12—Formation of a green body by photopolymerisation, e.g. stereolithography [SLA] or digital light processing [DLP]
-
- 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
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
Abstract
The invention discloses a kind of DLP laser fast shaping 3D printer shields being conveniently replaceable, including shield, the front side end of the shield offers observation window, the bottom end of the shield offers cover mouth, the shield is symmetrically fixedly connected with connecting plate away from the side opposite of observation window, mechanism for assembling-disassembling is fixedly installed on the connecting plate, the mechanism for assembling-disassembling includes guide rod, support plate, support rod, first hook and support box body, the support box body is fixedly mounted on the upper end of mechanism for assembling-disassembling, the guide rod sliding plug is at the middle part of support box body, the inside center end of the support box body is fixedly installed with limit spring, the front end of the guide rod is fixedly connected with connecting rod, first hook is fixedly connected below the front end of connecting rod, the lower end of first hook is connected with the second hook, the support rod is fixedly connected In the lower end of the second hook, support plate is fixedly installed on the support rod.Dismounting and change of the present invention is convenient and efficient, time saving and energy saving.
Description
Technical field
The present invention relates to 3D printing equipment technical field, specially a kind of DLP laser fast shaping 3D being conveniently replaceable is beaten
Print machine shield.
Background technique
3D printer is based on a digital model file, and with adhesive materials such as powdery metal or plastics, is led to
The technology of object is constructed after the mode successively printed.DLP laser fast shaping 3D printer belongs to one kind of 3D printer,
Needed in use using shield, in existing DLP laser fast shaping 3D printer shield use process by with branch
Support arrangement is mutually fixedly connected, and the lifting of shield is controlled by support device, but shield is mutually fixedly connected with support device,
It is cumbersome in disassembly process when needing replacing shield, a large amount of time is wasted, and existing shield majority is used in internal and branch
Support arrangement is mutually fixedly connected, and undoubtedly increases the difficulty of disassembly and replacement again, need to go deep into hand when being dismantled every time to
The inside of shield considerably increases the difficulty of disassembly and replacement.
New content
The purpose of the present invention is to provide a kind of DLP laser fast shaping 3D printer shields being conveniently replaceable, to solve
The problems mentioned above in the background art.
To achieve the above object, the invention provides the following technical scheme: a kind of DLP laser fast shaping 3D being conveniently replaceable
Printer shield, including shield, the front side end of the shield offer observation window, and the bottom end of the shield offers cover mouth, institute
It states shield and is symmetrically fixedly connected with connecting plate away from the side opposite of observation window, be fixedly installed with changer on the connecting plate
Structure, the mechanism for assembling-disassembling include guide rod, support plate, support rod, the first hook and support box body, the fixed peace of the support box body
Mounted in the upper end of mechanism for assembling-disassembling, the guide rod sliding plug is in the middle part of support box body, the inside center of the support box body
End is fixedly installed with limit spring, and the front end of the guide rod is fixedly connected with connecting rod, and first hook is fixedly connected on
Below the front end of connecting rod, the lower end of first hook is connected with the second hook, and the support rod is fixedly connected on the second extension
The lower end of hook is fixedly installed with support plate on the support rod, and the upper end of the support plate is fixedly connected with card adapter plate, the company
The front bottom end of extension bar is connected with extruding spring.
Preferably, the support box body is mutually fixedly connected by connecting plate with shield, and the bottom face of the support box body is opened
Equipped with card slot, and the card adapter plate is adapted clamping with card slot.
Preferably, the front bottom end of the connecting rod offers mounting groove, and squeezes spring and be fixedly mounted on mounting groove
Inside, and the top of second hook is located at the underface for squeezing spring, the top of first hook and the second hook is equal
It is set as in 45 ° of inclined sliding shapes.
Preferably, outside the bottom end of the support rod and inside offers connection screw thread.
Preferably, limit spliced eye is offered in the middle part of the support box body, and the guide rod sliding plug is in grafting
The inside in hole.
Preferably, the material of the observation window is transparent glass, and the bottom end of the shield is inlaid with sealing rubber ring.
Preferably, one end of the limit spring with support box body inner end be mutually fixedly connected, the limit spring it is another
One end is mutually fixedly connected with the top of connecting rod.
Compared with prior art, beneficial effects of the present invention are as follows:
Mechanism for assembling-disassembling in the present invention is mounted on the rear end face of shield by connecting plate, so as to avoid mechanism for assembling-disassembling installation
Disassembly and assembly is cumbersome during shield is replaced in the inside of shield, outside the bottom end of the support rod and inside company of offering
Connect be threaded through the screw thread that inside and outside opens up can make support rod with outside support device quickly connect, it is vertical by external force
Support rod is moved up, so that support rod drives the second hook to move straight up, the top of the first hook and the second hook is equal
It is set as being in 45 ° of inclined sliding shapes, therefore the first hook is under the shock of the second hook and when the first hook and the second hook
Between the extruding force that laterally generates when being greater than the elastic force of limit spring the first hook can generate the displacement of a transverse direction, when pressing is being led
Hand on bar stops pressing when feeling pause and transition in rhythm or melody sense, and guide rod lateral displacement under the action of limit spring elastic force is multiple at this time
Position fast implements so that guide rod drives the first hook lateral displacement and the first hook and second is made to link up with hook
External means of support passes through the purpose that support rod is mutually fixedly connected with shield, need to only pass through external force when needing replacing disassembly shield
Guide rod is pressed, guide rod and connecting rod drive the first hook laterally to generate position when pressing force is greater than the elastic force of limit spring
It moves, the first hook is mutually separated with the second hook at this time, and support rod is extracted out by the inside of support box body, fast implements support
The separation and disassembly of device and shield, the front bottom end of connecting rod is mounted with to squeeze spring, and hangs in the first hook and second
Hook squeezes mutual extrusion between spring and the second hook after fastening, it is ensured that in lifting shield between external device (ED) and shield
It is in stable state in the process, support plate has been fixedly mounted on support rod, the upper end of support plate is equipped with card adapter plate, and props up
The bottom face of support box body offers card slot, and card adapter plate is adapted clamping with card slot, but also support rod passes through support plate and connection
Plate is mutually fixedly connected with shield, has again ensured that the lifting for the control shield that external means of support can be stable, it is therefore prevented that shield
Shaking is generated in lifting process.
Detailed description of the invention
Fig. 1 is agent structure schematic diagram of the present invention；
Fig. 2 is main body side view of the present invention；
Fig. 3 is bottom part body structural schematic diagram of the present invention；
Fig. 4 is mechanism for assembling-disassembling cutting figure of the present invention；
Fig. 5 is present invention support tray interior structure chart；
Fig. 6 is invention hook seperated schematic diagram；
Fig. 7 is that invention hook hooks schematic diagram.
In figure: 1- mechanism for assembling-disassembling, 2- shield, 3- observation window, 4- connecting plate, 5- cover mouth, 6- guide rod, 7- support plate, 8-
Support rod, the hook of 9- first, 10- support box body, 11- limit spring, 12- card adapter plate, the hook of 13- second, 14- connecting rod, 15-
Squeeze spring.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1-7, a kind of embodiment provided by the invention: a kind of DLP laser fast shaping 3D being conveniently replaceable is beaten
Print machine shield, including shield 2, the front side end of shield 2 offer observation window 3, and the bottom end of shield 2 offers cover mouth 5, and shield 2 is carried on the back
Side opposite from observation window 3 is symmetrically fixedly connected with connecting plate 4, is fixedly installed with mechanism for assembling-disassembling 1, changer on connecting plate 4
Structure 1 includes guide rod 6, support plate 7, the hook of support rod 8, first 9 and support box body 10, and support box body 10 is fixedly mounted on dismounting
The upper end of mechanism 1,6 sliding plug of guide rod are fixedly mounted at the middle part of support box body 10, the inside center end of support box body 10
There is limit spring 11, the front end of guide rod 6 is fixedly connected with connecting rod 14, before the first hook 9 is fixedly connected on connecting rod 14
The lower end of end lower section, the first hook 9 is connected with the second hook 13, and support rod 8 is fixedly connected on the lower end of the second hook 13, support
Support plate 7 is fixedly installed on bar 8, the upper end of support plate 7 is fixedly connected with card adapter plate 12, the front bottom end connection of connecting rod 14
Have and squeezes spring 15.
Support box body 10 is fixedly connected by connecting plate 4 with 2 phase of shield, and the bottom face of support box body 10 offers card slot,
And card adapter plate 12 is adapted clamping with card slot, the front bottom end of connecting rod 14 offers mounting groove, and squeezes the fixed peace of spring 15
It is located at the underface for squeezing spring 15, the first hook 9 and the second hook mounted in the top of the inside of mounting groove, and the second hook 13
13 top is set as in 45 ° of inclined sliding shapes, and the bottom end outside of support rod 8 and inside offer connection screw thread, supports
The middle part of box body 10 offers limit spliced eye, and 6 sliding plug of guide rod, in the inside of spliced eye, the material of observation window 3 is
Transparent glass, and the bottom end of shield 2 is inlaid with sealing rubber ring, one end of limit spring 11 and the inner end of support box body 10 are mutually solid
Fixed connection, the other end of limit spring 11 are mutually fixedly connected with the top of connecting rod 14.
Working principle: being threadedly coupled by support rod 8 with external means of support first, then will be supported using external force
Bar 8 is inserted into support box body 10 together with support plate 7, when the motive force that external force is wide enough so that the second hook 13 laterally generates is big
Limit spring 11 generates deformation when the elastic force under natural conditions of limit spring 11, and limit spring 11 drives the first hook 9
Displacement is laterally generated, the second hook 13 is interlocked with the first hook 9 at this time, and the top that spring 15 is squeezed after fastening squeezes second and hangs
The top of hook 13 prevents from loosening between the first hook 9 and the second hook 13, and fastened in the first hook 9 and the second hook 13
The limit spliced eye that card adapter plate 12 is opened up with support 10 bottom end of box body simultaneously fastens, so that shield 2 compares during lifting
Compared with stabilization, only need to be by pressed by external force guide rod 6, when pressing force is greater than limit spring 11 when needing replacing disassembly shield 2
Elastic force and squeeze spring 15 and second hook 13 between generate frictional force when connecting rod 14 drive first hook 9 laterally generate
Displacement, at this time first hook 9 and second hook 13 separation, then by external force press down on support rod 8 so that card adapter plate 12 and
Box body 10 is supported to separate, thus realize support rod 8 and support the separation of box body 10, final point for realizing shield 2 and support device
From carrying out dismounting installation and replacement so as to quick shield 2.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of DLP laser fast shaping 3D printer shield being conveniently replaceable, including shield (2), it is characterised in that: the shield
The front side end of cover (2) offers observation window (3), and the bottom end of the shield (2) offers cover mouth (5), and the shield (2) is away from sight
The side opposite for examining window (3) is symmetrically fixedly connected with connecting plate (4), is fixedly installed with mechanism for assembling-disassembling on the connecting plate (4)
(1), the mechanism for assembling-disassembling (1) includes guide rod (6), support plate (7), support rod (8), the first hook (9) and support box body
(10), support box body (10) is fixedly mounted on the upper end of mechanism for assembling-disassembling (1), and guide rod (6) sliding plug is supporting
The inside center end at the middle part of box body (10), support box body (10) is fixedly installed with limit spring (11), the guide rod
(6) front end is fixedly connected with connecting rod (14), and first hook (9) is fixedly connected below the front end of connecting rod (14),
The lower end of first hook (9) is connected with the second hook (13), and the support rod (8) is fixedly connected on the second hook (13)
Lower end is fixedly installed with support plate (7) on the support rod (8), and the upper end of the support plate (7) is fixedly connected with card adapter plate
(12), the front bottom end of the connecting rod (14), which is connected with, squeezes spring (15).
2. a kind of DLP laser fast shaping 3D printer shield being conveniently replaceable according to claim 1, feature exist
In: the support box body (10) is mutually fixedly connected by connecting plate (4) with shield (2), the bottom face of support box body (10)
Card slot is offered, and the card adapter plate (12) is adapted clamping with card slot.
3. a kind of DLP laser fast shaping 3D printer shield being conveniently replaceable according to claim 1, feature exist
In: the front bottom end of the connecting rod (14) offers mounting groove, and squeezes the inside that spring (15) are fixedly mounted on mounting groove,
And the top of second hook (13) is located at the underface for squeezing spring (15), first hook (9) and the second hook
(13) top is set as in 45 ° of inclined sliding shapes.
4. a kind of DLP laser fast shaping 3D printer shield being conveniently replaceable according to claim 1, feature exist
In: outside the bottom end of the support rod (8) and inside offers connection screw thread.
5. a kind of DLP laser fast shaping 3D printer shield being conveniently replaceable according to claim 1, feature exist
In: limit spliced eye is offered in the middle part of the support box body (10), and the guide rod (6) sliding plug is in spliced eye
Portion.
6. a kind of DLP laser fast shaping 3D printer shield being conveniently replaceable according to claim 1, feature exist
In: the material of the observation window (3) is transparent glass, and the bottom end of the shield (2) is inlaid with sealing rubber ring.
7. a kind of DLP laser fast shaping 3D printer shield being conveniently replaceable according to claim 1, feature exist
Mutually be fixedly connected in: one end of the limit spring (11) with the inner end of support box body (10), the limit spring (11) it is another
One end is mutually fixedly connected with the top of connecting rod (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811597889.0A CN109514853B (en) | 2018-12-26 | 2018-12-26 | DLP laser rapid prototyping 3D printer guard shield convenient to change |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811597889.0A CN109514853B (en) | 2018-12-26 | 2018-12-26 | DLP laser rapid prototyping 3D printer guard shield convenient to change |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109514853A true CN109514853A (en) | 2019-03-26 |
| CN109514853B CN109514853B (en) | 2024-05-07 |
Family
ID=65798164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811597889.0A Active CN109514853B (en) | 2018-12-26 | 2018-12-26 | DLP laser rapid prototyping 3D printer guard shield convenient to change |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109514853B (en) |
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|---|---|---|---|---|
| JPH06275349A (en) * | 1993-03-19 | 1994-09-30 | Ichikoh Ind Ltd | Socket for wedge base valve |
| KR20080064076A (en) * | 2007-01-03 | 2008-07-08 | 배종식 | The front door for building |
| CN205406338U (en) * | 2016-03-31 | 2016-07-27 | 国网山东省电力公司阳谷县供电公司 | Electrical switch locking device |
| CN205889897U (en) * | 2016-05-19 | 2017-01-18 | 江苏锐辰光电技术有限公司 | Novel laser 3D printer |
| CN108317383A (en) * | 2018-01-30 | 2018-07-24 | 海宁依普卡进出口有限公司 | A kind of Weaving device protective device |
| CN209478963U (en) * | 2018-12-26 | 2019-10-11 | 苏州慧通汇创科技有限公司 | A kind of DLP laser fast shaping 3D printer shield being conveniently replaceable |
-
2018
- 2018-12-26 CN CN201811597889.0A patent/CN109514853B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06275349A (en) * | 1993-03-19 | 1994-09-30 | Ichikoh Ind Ltd | Socket for wedge base valve |
| KR20080064076A (en) * | 2007-01-03 | 2008-07-08 | 배종식 | The front door for building |
| CN205406338U (en) * | 2016-03-31 | 2016-07-27 | 国网山东省电力公司阳谷县供电公司 | Electrical switch locking device |
| CN205889897U (en) * | 2016-05-19 | 2017-01-18 | 江苏锐辰光电技术有限公司 | Novel laser 3D printer |
| CN108317383A (en) * | 2018-01-30 | 2018-07-24 | 海宁依普卡进出口有限公司 | A kind of Weaving device protective device |
| CN209478963U (en) * | 2018-12-26 | 2019-10-11 | 苏州慧通汇创科技有限公司 | A kind of DLP laser fast shaping 3D printer shield being conveniently replaceable |
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| Publication number | Publication date |
|---|---|
| CN109514853B (en) | 2024-05-07 |
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