CN206579141U - A kind of melting conveying device of 3D printing plastics - Google Patents
A kind of melting conveying device of 3D printing plastics Download PDFInfo
- Publication number
- CN206579141U CN206579141U CN201720308275.0U CN201720308275U CN206579141U CN 206579141 U CN206579141 U CN 206579141U CN 201720308275 U CN201720308275 U CN 201720308275U CN 206579141 U CN206579141 U CN 206579141U
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- Prior art keywords
- conveying
- melting
- extrusion
- chamber
- cooling
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- 239000004033 plastic Substances 0.000 title claims abstract description 106
- 229920003023 plastic Polymers 0.000 title claims abstract description 106
- 238000002844 melting Methods 0.000 title claims abstract description 49
- 230000008018 melting Effects 0.000 title claims abstract description 49
- 238000010146 3D printing Methods 0.000 title claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims abstract description 73
- 238000001816 cooling Methods 0.000 claims abstract description 54
- 238000009413 insulation Methods 0.000 claims description 38
- 238000010438 heat treatment Methods 0.000 claims description 30
- 239000012943 hotmelt Substances 0.000 claims description 24
- 230000004888 barrier function Effects 0.000 claims description 20
- 239000002994 raw material Substances 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 11
- 125000003003 spiro group Chemical group 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 4
- 238000007639 printing Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
Abstract
The utility model discloses a kind of melting conveying device of 3D printing plastics, belong to 3D printing field, it is directly inputted to the problem of 3D printer is unstable after solving plastic extrusion in the prior art, solving the technical scheme of the problem mainly includes mainframe and melting extrusion component and cooling traction component on mainframe, melting extrusion component is used to the plastic molten melt after crushing being extruded into plastic cord, cooling traction component is printed for plastic cord to be delivered into 3D printer, melting extrusion component includes melt chamber and extrusion nozzle, cool down traction component and be located at the horizontal side of melt chamber, extrusion nozzle is located at the downstream of melt chamber, extrusion nozzle direction cooling traction component.The utility model is used primarily to ensure that melting extrusion component is printed 3D printer is used directly for after plastic extrusion.
Description
Technical field
The utility model is related to 3D printing, particularly a kind of melting conveying device of 3D printing plastics.
Background technology
3D printer is just used in production and living more and more as a kind of rapid forming equipment.Some schools,
The objective and small-sized operating room of wound also more is equipped with small-sized 3D printer.Existing small-sized 3D printer is generally fused deposition modeling formula, is made
Printing consumables is used as with the similar material of plastics or performance.
The method that existing fused deposition modeling formula 3D printer obtains printing consumables is to be melted particle or powdered plastic by factory
Melt and be extruded as plastic cord, plastic wire spool rolling up dish for steel is sold, user purchases the prefabricated plastic cord input 3D printer coiled and entered
Row printing.User can also be used the melting extrusion component of desktop level (small-sized) to carry out melting extrusion to plastic raw materials and form plastics
Line, the plastic cord coiled then by plastic wire spool rolling up dish for steel, inputted when needing printing and beaten in small-sized 3D printer
Print.Because the melting extrusion component of desktop level is in order to pursue miniaturization, cause power limited system, the extruded velocity of plastic cord compares
Slowly, plastic cord is coiled needs to expend the greater amount time, therefore existing user is when using small-sized 3D printer, meeting
It is expected that melting extrusion component is printed 3D printer is directly inputted to after plastic extrusion.
Utility model content
The utility model purpose to be reached just is to provide a kind of melting conveying device of 3D printing plastics, it is ensured that molten
Melt extrusion component to be printed 3D printer is used directly for after plastic extrusion.
In order to achieve the above object, the utility model is adopted the following technical scheme that:A kind of melting of 3D printing plastics is defeated
Device, including mainframe and melting extrusion component and cooling traction component on mainframe are sent, melting extrusion component is used for
Plastic raw materials melting extrusion forms plastic cord, and cooling traction component is printed for plastic cord to be delivered into 3D printer, is melted
Melting extrusion component includes melt chamber and extrusion nozzle, and cooling traction component is located at the horizontal side of melt chamber, and extrusion nozzle is located at
The downstream of melt chamber, extrusion nozzle direction cooling traction component.
Further, the cooling traction component includes support baseboard and the conveyer being located on support baseboard, supports bottom
Plate is connected on mainframe, and conveyer has passing channel, and extrusion nozzle is located along the same line with passing channel.
Further, it is located on the support baseboard between conveyer and extrusion nozzle and is provided with guide reel and radiator.
Further, the conveyer includes conveying seat, conveying driving wheel, conveying driven pulley and conveying motor, conveying electricity
Machine drives conveying driving wheel, and conveying driven pulley rotates connection relative to conveying seat, formed between conveying driving wheel and conveying driven pulley
Gap is conveyed, conveying seat is provided with charging aperture and discharging opening, and charging aperture, discharging opening and conveying gap form passing channel.
Further, it is provided with storage tank of the conveying seat provided with accommodating conveying driving wheel, conveying driven pulley, storage tank
The travelling carriage that can be slided along storage tank, conveying driven pulley is rotatably connected on travelling carriage, and conveying seat is adjusted provided with regulation driver
The output end of section driver is connected with travelling carriage, and regulation driver drives travelling carriage and conveying driven pulley are slided in storage tank and
Regulation conveying gap.
Further, the melting extrusion component also includes feed cavity, feeding motor, feed cylinder and feeding spiro rod, charging
Chamber is used to input plastic raw materials, and feeding spiro rod, which is located in feed cylinder and driven by feeding motor, to be rotated, the upstream end of feed cylinder with
Feed cavity is connected, and the downstream of feed cylinder is provided with thermal insulation barriers, and thermal insulation barriers are provided with heat insulation path, and the downstream of feed cylinder passes through heat-insulated
Passage is connected with hot melt chamber.
Further, cooling piece is provided between the downstream of the thermal insulation barriers and feed cylinder, cooling piece is provided with cooling tube, cold
But pipe is connected to form cooling circulation with water pump, water tank, and thermal insulation barriers are connected by cooling piece with feed cylinder, and cooling piece is logical provided with cooling
Road, the downstream of feed cylinder, cooling duct, heat insulation path are sequentially communicated with hot melt chamber.
Further, the first heating member is fixed with the thermal insulation barriers, hot melt chamber includes what is set through the first heating member
First chamber, the first chamber is connected with heat insulation path.
Further, the downstream of first heating member is additionally provided with the second heating member, and hot melt chamber includes adding located at second
The second chamber in warmware, the second chamber is connected with the first chamber, and extrusion nozzle is located at the downstream of the second heating member and connected with the second chamber
It is logical.
Further, the feed cavity is provided with the first charging aperture connected with the particle component of recycled plastic and for inputting
Second charging aperture without used plastic raw materials, first charging aperture be located at feed cavity side, second charging aperture be located at into
Expect the upstream end of chamber.
After adopting the above technical scheme, the utility model has the following advantages that:By extrusion nozzle towards cooling traction component,
Turned to equivalent to plastics from the moving line after melting extrusion component extrusion by 90 degree so that the plastics of fusing are needed full of molten
Melt most of region ability extrusion plastic line of chamber, that is, reduce air in hot melt chamber, it is suppressed that the generation of bubble, improve hot melt
The pressure of intracavitary, is conducive to improving the intensity for the plastic cord extruded, and is easy to plastic cord to be handled in time after extruding, while can be with
Reduce the flow velocity of the plastics of fusing so that the extrusion of plastics relys more on the feeding of upstream plastics, rather than after plastic molting
Mobility, is conducive to influenceing the rate of extrusion of plastic cord by adjusting the feed speed of plastics, is also easier to adjust plastic cord
Diameter.Because the intensity of plastic cord is higher, cooling traction component is difficult plastics line drawing in cooling distraction procedure, less
Plastic cord can be broken, it is ensured that plastic cord can reliably be delivered to 3D printer, realize that plastic cord is continuously and effectively conveyed, protected
Demonstrate,prove print quality.It is that user's saving is substantial amounts of due to 3D printer can be directly inputted after melting extrusion component extrusion plastic line
Stand-by period, improve the efficiency that user uses 3D printer.
Brief description of the drawings
The utility model is described in further detail below in conjunction with the accompanying drawings:
Fig. 1 is the structural representation (one) of melting extrusion component in the utility model embodiment one;
Fig. 2 is the structural representation (two) of melting extrusion component in the utility model embodiment one;
Fig. 3 is the structural representation (one) of cooling traction component in the utility model embodiment one;
Fig. 4 is the structural representation (two) of cooling traction component in the utility model embodiment one;
Fig. 5 is the structural representation (part) of melting extrusion component in the utility model embodiment two;
Fig. 6 is the structural representation of melting extrusion component in the utility model embodiment two.
Embodiment
The utility model provides a kind of melting conveying device of 3D printing plastics, including mainframe and on mainframe
Melting extrusion component and cooling traction component, melting extrusion component be used for by plastic raw materials melting extrusion formed plastic cord, it is cold
But traction component is printed for plastic cord to be delivered into 3D printer, and melting extrusion component includes melt chamber and extrusion is sprayed
Mouth, cooling traction component is located at the horizontal side of melt chamber, and extrusion nozzle is located at the downstream of melt chamber, and extrusion nozzle is towards cold
But traction component.
The utility model is by extrusion nozzle direction cooling traction component, equivalent to plastics after melting extrusion component extrusion
Moving line is by 90 degree of steerings so that the plastics of fusing need most of region ability extrusion plastic line full of melt chamber,
Reduce air in hot melt chamber, it is suppressed that the generation of bubble, improve the pressure of hot melt intracavitary, be conducive to improving the plastics extruded
The intensity of line, is easy to plastic cord to be handled in time after extruding, while the flow velocity of the plastics of fusing can be reduced so that plastics
Extrusion relys more on the feeding of upstream plastics, rather than the mobility after plastic molting, is conducive to the feeding by adjusting plastics
Speed influences the rate of extrusion of plastic cord, is also easier to adjust the diameter of plastic cord.Because the intensity of plastic cord is higher, cooling
Traction component is difficult, by plastics line drawing, will not more break plastic cord in cooling distraction procedure, it is ensured that plastic cord can
3D printer is delivered to by ground, realizes that plastic cord is continuously and effectively conveyed, it is ensured that print quality.
The plastics not refered in particular in the utility model each mean the 3D printing plastics of recovery.It is previously mentioned in the utility model
Upstream, downstream be to be defined according to the conveying direction of plastics, the processing sequence below as plastics is entered from upstream to downstream
The explanation of row concrete structure.
Embodiment one:
Seen with reference to Fig. 1, Fig. 2, Fig. 3 and Fig. 4.
Melting extrusion component 300 also includes feed cavity 31, feeding motor 32, feed cylinder 33 and feeding spiro rod 34, feed cavity
31 are used to input plastic raw materials, and feeding spiro rod 34 is located in feed cylinder 33 and drives rotation by feeding motor 32, feed cylinder 33
Upstream end is connected with feed cavity 31, and the downstream of feed cylinder 33 is provided with thermal insulation barriers 35, and thermal insulation barriers 35 are provided with heat insulation path 351, sent
The downstream of barrel 33 is connected by heat insulation path 351 with hot melt chamber.Feed cylinder 33 is separated with hot melt chamber using thermal insulation barriers 35
Connection, reduces influence of the heat of hot melt chamber to feed cylinder 33, it is to avoid the plastics in feed cylinder 33 melt in advance, so as to avoid sending
There is situation about blocking in barrel 33 after cooling down, when hot melt chamber is again started up work, it is not necessary to will be blocked up by preheating in feed cylinder 33
The plastic molting of plug, therefore preheating time need not be increased, improve melting extrusion efficiency.The upstream end of feed cylinder 33 passes through first
The support of support 331 is fixed, and the downstream of feed cylinder 33 is supported by second support 332 and fixed, and thermal insulation barriers 35 can be fixed on the
On two supports 332.Feeding motor 32 can drive feeding spiro rod 34 by gear drive.
Feed cavity 31 is provided with the first charging aperture 311 connected with the particle component of recycled plastic and for inputting without using
The second charging aperture 312 for the plastic raw materials crossed, first charging aperture 311 is located at the side of feed cavity 31, and second charging aperture 312 is located at
The upstream end of feed cavity 31.First charging aperture 311 can also be only set.New purchase is generally referred to without used plastic raw materials
Raw material, feed pipe 313 and feed hopper 314 can be set in second charging aperture 312.Feed cavity 31 is broken with recycled plastic
Expect component connection, it is possible to achieve the recycling of plastics.
In the present embodiment, thermal insulation barriers 35 are made of heat-barrier material, such as polyether-ether-ketone etc., heat insulation path
351 are set through heat insulation.Thermal insulation barriers can have certain using the larger block structure of thickness, the heat insulation path 351 of formation
Length, good heat-insulation effect, and block structure are easily produced, and are easily installed.
In the present embodiment, the first heating member 361 is fixed with thermal insulation barriers 35, hot melt chamber includes setting through the first heating member
The first chamber 301, the first heating member 361 be provided with heating tube or heater strip, hot melt chamber be typically provided to circle, be conducive to enter heat
The plastics of molten chamber are heated evenly, and improve melting efficiency.
In order to improve hot melt effect, the downstream of the first heating member 361 is additionally provided with the second heating member 362, and hot melt chamber includes
The second chamber in the second heating member 362, the second chamber is connected with the first chamber, and extrusion nozzle 38 is located at the second heating member 362
Downstream, the second heating member 362 is again provided with heating tube or heater strip, the hot melt higher equivalent to one temperature of the second chamber formation
Region, it is ensured that plastics are in fluid state in the second intracavitary.First heating member 361 and the second heating member 362 can set temperature
Degree sensor carrys out monitoring temperature.Simultaneously because the first chamber and the second chamber formation two hot melt zones, so single can heat it is more
Plastics, be conducive to the raising of plastic extrusion speed, can within the same time the more plastic cords of output, can meet directly it is defeated
Enter 3D printer printing and consumptive material is made the need for storing.Heating temperature is separately controlled in first heating member 361 and the second heating member 362
Degree, it is possible to achieve the accurate temperature control of segmentation, plastics sequentially pass through feed cylinder, heat insulation path, the first chamber and the second chamber, and temperature gradually has
Sequence rises, and advantageously reduces the bubble of plastics, improves the quality of plastic cord.Extrusion nozzle 38 is located at the horizontal side of the second chamber,
Extrusion nozzle 38 can be detachably connected with the second heating member 362, for example, be threadedly coupled, and can easily change different bores
Extrusion nozzle 38, can extrude the plastic cord of different-diameter.After plastic cord extrusion, it is possible to use cooling fan 39 is cooled down, it is to avoid
It is sagging by conducting oneself with dignity.
Cooling traction component 500 includes support baseboard 51 and the conveyer 52 being located on support baseboard 51, support baseboard 51
It is connected on mainframe 100, conveyer 52 has passing channel, extrusion nozzle 38 is located along the same line with passing channel.
Conveyer 52 includes conveying seat 521, conveying driving wheel 522, conveying driven pulley 523 and conveying motor 524, conveying electricity
The output shaft of machine 524 can be directly installed on the output shaft of conveying motor 524 through conveying seat 521, conveying driving wheel 522,
Convey motor 524 and drive conveying driving wheel 522, conveying driven pulley 523 is rotatably connected on conveying seat 521, conveys driving wheel 522
Conveying gap is formed between conveying driven pulley 523, conveying seat 521 is provided with charging aperture 5211 and discharging opening 5212, charging aperture
5211st, discharging opening 5212 and conveying gap form passing channel.Convey seat 521 driven provided with accommodating conveying driving wheel 522, conveying
The storage tank 5213 of wheel 523, conveying driving wheel 522 can use gear, can produce axial tension to plastic cord when rotated,
Plastic cord is exported.Conveying motor 524 is fixed on support baseboard 51, and conveying seat 521 is fixed on conveying motor 524, conveying
Motor 524 can use servomotor.
In order to which conveyer 52 can convey the plastic cord of different-diameter, conveyer 52 is provided with regulation conveying gap length
Driver 55 is adjusted, is that conveying driven pulley 523 is rotatably connected on travelling carriage 56 by this, travelling carriage 56 slides and is located at storage tank
In 5213, regulation driver 55 is fixed on conveying seat 521, and the output end of regulation driver 55 is connected with travelling carriage 56, is adjusted
Driver 55 drives travelling carriage 56 to slide in storage tank 5213 to adjust conveying driven pulley 523 between conveying driving wheel 522
Away from i.e. realization regulation conveys the size in gap.
It is located on support baseboard 521 between conveyer 522 and extrusion nozzle 38 and is provided with guide reel 53 and radiator 54.Radiating
Device 54 can use fan.
Embodiment two:
In order to improve effect of heat insulation, the present embodiment increases cooling piece on the basis of embodiment one, specific such as Fig. 5 and Fig. 6
It is shown, cooling piece 37 is provided between the downstream of thermal insulation barriers 35 and feed cylinder 33, cooling piece 37 is provided with cooling tube 371, cooling tube
371 connect formation cooling circulation with water pump 372, water tank 373, and thermal insulation barriers 35 are connected by cooling piece 37 with feed cylinder, cooling piece
37 are provided with cooling duct 370, and the downstream of feed cylinder 33, cooling duct 370, heat insulation path 351 are sequentially communicated with hot melt chamber.It is cold
But part 37 is due to using hydronic mode, therefore cooling effect is relatively good, can preferably avoid plastics in feed cylinder 33
Interior fusing, plastics gradually rise in order from the downstream of feed cylinder 33, cooling duct 370, heat insulation path 351 to hot melt chamber, temperature
Height, plastics can be gradually changed from fusing is preheating to, it is possible to reduce the generation of bubble, improve the plastics line mass of extrusion.
In the present embodiment, due to being connected between the heating member of cooling piece 37 and first by thermal insulation barriers 35, therefore cooling piece
37 do not interfere with the normal heating of the first heating member, and thermal insulation barriers 35 have certain temperature, and plastics can be preheated in heat insulation path, but
It is not up to the temperature of fusing.
Other content reference implementation examples one not described.
In addition to above preferred embodiment, the utility model also has other embodiments, and those skilled in the art can root
It is variously modified and deforms according to the utility model, without departing from spirit of the present utility model, the utility model all should be belonged to
Scope as defined in the claims.
Claims (10)
1. a kind of melting conveying device of 3D printing plastics, including mainframe and melting extrusion component on mainframe and
Traction component is cooled down, melting extrusion component is used to plastic raw materials melting extrusion forming plastic cord, and cooling traction component is used for will
Plastic cord is delivered to 3D printer and printed, and melting extrusion component includes melt chamber and extrusion nozzle, it is characterised in that described
Cool down traction component and be located at the horizontal side of melt chamber, extrusion nozzle is located at the downstream of melt chamber, extrusion nozzle direction cooling
Traction component.
2. melting conveying device according to claim 1, it is characterised in that the cooling traction component includes support baseboard
With the conveyer being located on support baseboard, support baseboard is connected on mainframe, and conveyer has a passing channel, extrusion nozzle with
Passing channel is located along the same line.
3. melting conveying device according to claim 2, it is characterised in that be located at conveyer on the support baseboard with squeezing
Guide reel and radiator are provided between delivery nozzle.
4. melting conveying device according to claim 2, it is characterised in that the conveyer includes conveying seat, conveying master
Driving wheel, conveying driven pulley and conveying motor, conveying motor drive conveying driving wheel, and conveying driven pulley is rotated relative to conveying seat to be connected
Connect, conveying driving wheel and conveying driven pulley between formed conveying gap, conveying seat be provided with charging aperture and discharging opening, charging aperture,
Discharging opening and conveying gap form passing channel.
5. melting conveying device according to claim 4, it is characterised in that the conveying seat is provided with accommodating conveying active
Provided with the travelling carriage that can be slided along storage tank in the storage tank of wheel, conveying driven pulley, storage tank, conveying driven pulley is rotatably connected on
On travelling carriage, conveying seat is connected provided with regulation driver, the output end of regulation driver with travelling carriage, adjusts driver drives
Travelling carriage and conveying driven pulley slide to adjust conveying gap in storage tank.
6. according to any described melting conveying device of claim 1 to 5, it is characterised in that the melting extrusion component is also wrapped
Feed cavity, feeding motor, feed cylinder and feeding spiro rod are included, feed cavity is used to input plastic raw materials, and feeding spiro rod is located at feed cylinder
Interior and driven and rotate by feeding motor, the upstream end of feed cylinder connects with feed cavity, the downstream of feed cylinder provided with thermal insulation barriers, every
Warmware is provided with heat insulation path, and the downstream of feed cylinder is connected by heat insulation path with hot melt chamber.
7. melting conveying device according to claim 6, it is characterised in that the downstream of the thermal insulation barriers and feed cylinder it
Between be provided with cooling piece, cooling piece be provided with cooling tube, cooling tube connected with water pump, water tank to be formed cooling circulate, thermal insulation barriers pass through cold
But part is connected with feed cylinder, and cooling piece is provided with cooling duct, downstream, cooling duct, heat insulation path and the hot melt chamber of feed cylinder
It is sequentially communicated.
8. melting conveying device according to claim 6, it is characterised in that the first heating is fixed with the thermal insulation barriers
Part, hot melt chamber includes the first chamber set through the first heating member, and the first chamber is connected with heat insulation path.
9. melting conveying device according to claim 8, it is characterised in that the downstream of first heating member is additionally provided with
Second heating member, hot melt chamber includes the second chamber in the second heating member, and the second chamber is connected with the first chamber, and extrusion nozzle is located at
The downstream of second heating member is simultaneously connected with the second chamber.
10. melting conveying device according to claim 6, it is characterised in that the feed cavity is provided with and recycled plastic
Particle component connection first charging aperture and for inputting the second charging aperture without used plastic raw materials, first charging aperture
Positioned at the side of feed cavity, second charging aperture is located at the upstream end of feed cavity.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201720308275.0U CN206579141U (en) | 2017-03-27 | 2017-03-27 | A kind of melting conveying device of 3D printing plastics |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201720308275.0U CN206579141U (en) | 2017-03-27 | 2017-03-27 | A kind of melting conveying device of 3D printing plastics |
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Publication Number | Publication Date |
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CN206579141U true CN206579141U (en) | 2017-10-24 |
Family
ID=60114199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN201720308275.0U Active CN206579141U (en) | 2017-03-27 | 2017-03-27 | A kind of melting conveying device of 3D printing plastics |
Country Status (1)
Country | Link |
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CN (1) | CN206579141U (en) |
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2017
- 2017-03-27 CN CN201720308275.0U patent/CN206579141U/en active Active
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Legal Events
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TR01 | Transfer of patent right |
Effective date of registration: 20210831 Address after: 313200 No. 270, phase 1, No. 926, Changhong East Street, Fuxi street, Deqing County, Huzhou City, Zhejiang Province (Moganshan national high tech Zone) (self declaration) Patentee after: Magic core (Huzhou) Technology Co.,Ltd. Address before: 325000 901, building 8, Huanglong Kangyuan, Lucheng District, Wenzhou City, Zhejiang Province Patentee before: Chen Tianrun |