CN104552946B - Detection device, three-dimensional printer and 3 D-printing method - Google Patents
Detection device, three-dimensional printer and 3 D-printing method Download PDFInfo
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- CN104552946B CN104552946B CN201410827191.9A CN201410827191A CN104552946B CN 104552946 B CN104552946 B CN 104552946B CN 201410827191 A CN201410827191 A CN 201410827191A CN 104552946 B CN104552946 B CN 104552946B
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- photoelectric sensor
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- dimensional printer
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- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/115—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by spraying molten metal, i.e. spray sintering, spray casting
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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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- Chemical & Material Sciences (AREA)
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Abstract
The present invention relates to a kind of detection device in fusion sediment type three-dimensional printer, including mounting seat and the first detector unit；First detector unit includes the first detection wheel, spring, the first photoelectric sensor and the positioning roller being rotatably mounted in mounting seat and squeezing roller；The axis of squeezing roller is parallel with the axis of positioning roller and distance between axles is adjustable, and the restoring force of spring forces distance between axles between the two to become little, is formed with the passage of molding silk between the work surface of squeezing roller and the work surface of positioning roller；First detection wheel is coaxially connected with angle speed ground with squeezing roller or positioning roller, and the first detection wheel includes base portion and the occlusion part circumferentially along base portion, and the light path of the first photoelectric sensor rotates, around the axis of the first detection wheel, the plane formed through occlusion part.Whether this detection shape can there is the empty problem such as beat with detection three-dimensional printer.Additionally, the present invention also provides for using three-dimensional printer and the Method of printing thereof of this detection device.
Description
Technical field
The present invention relates to a kind of device, this extrusion equipment and forming method thereof for extrusion equipment is measured, specifically, relate to a kind of detection device in fusion sediment type three-dimensional printer, use three-dimensional printer and the Method of printing thereof of this detection device.
Background technology
Three-dimensional printer, is a kind of mathematical model based on three-dimensional body, utilizes powdery metal or plastic or other material, construct the equipment of three-dimensional body by the way of successively printing.
Notification number be the patent documentation of CN1216726C background technology in describe a kind of form with filament three-dimensional printer to printhead supply moulding material, seeing Fig. 1, three-dimensional printer 01 has printhead 011, feeding device 012, conduit 013 and object stage 014；Feeding device 012 has a supply disk 0121 being wound with molding silk 0123；Printhead 011 has a pair material-feeding rolling wheels 0113 and 0114 driven by motor 0115, liquefier 0111 and be located at the printing nozzle 0112 of liquefier 0111 lower end.In the rotating shaft 0122 of the supply disk installing rack that supply disk 0121 is installed in three-dimensional printer 01, thus molding silk 0123 is supplied to printhead 011.In use, molding silk 0123 is pulled out from supply disk 0121, make the molding silk being straightened by the conduit 013 being made up of the material that frictional resistance is less, until molding silk to be supplied to material-feeding rolling wheels 0113 and 0114, the material-feeding rolling wheels 0113 and 0114 driven by motor 0115 promotes molding silk to enter liquefier 0111 to produce a what is called " liquifier pump effect ", i.e. molding silk itself is equivalent to a piston, the moulding material of the molding silk extrusion molten state in entrance liquefier 0111, it is allowed to by certain volumetric rate from the loading surface that object stage 014 was extruded and be deposited on to printing nozzle 0112.The control unit of three-dimensional printer 01 moves in the X-Y plane of level by controlling printhead 011, controls object stage 014 Z axis vertically simultaneously and moves, thus prints three-dimensional body layer by layer.
But in print procedure, when there is blocking or Partial Blocking in printing nozzle 0112, material-feeding rolling wheels 0113 and 0114 easily skids with molding silk, cannot be from the moulding material of printing nozzle extrusion molten condition, or the diameter of extrusion molten condition moulding material is less than normal, cause that the print quality that three-dimensional body was beaten or reduced to sky occurs；When feeding device 012 lacks molding silk, will cause occurring that sky is beaten；When material-feeding rolling wheels does not rotates, also lead to occur that sky is beaten.
Summary of the invention
The main object of the present invention is to provide a kind of detection device in fusion sediment type three-dimensional printer, it is intended to can occur the three-dimensional printer using different-diameter specification molding silk empty beating, printing nozzle Partial Blocking or feeding device lack the problems such as material and be monitored；
It is a further object of the present invention to provide a kind of three-dimensional printer using above-mentioned detection device；
Another object of the present invention is to provide a kind of method utilizing above-mentioned three-dimensional printer to carry out printing three-dimensional body.
In order to realize above-mentioned main purpose, the present invention provides a kind of detection device in three-dimensional printer, and this detection device includes base and the first detector unit；First detector unit includes the first detection wheel, spring, the first photoelectric sensor and the positioning roller being rotatably mounted on base and squeezing roller；The axis of squeezing roller is parallel with the axis of positioning roller and distance between axles is adjustable, and the restoring force of spring forces the distance between axles between squeezing roller and positioning roller to become little, is formed with the passage of molding silk between the work surface of squeezing roller and the work surface of positioning roller；First detection wheel is coaxially connected with angle speed ground with squeezing roller or positioning roller, and the first detection wheel includes base portion and the occlusion part circumferentially along base portion, and the light path of the first photoelectric sensor rotates, around the axis of the first detection wheel, the plane formed through occlusion part.
From above scheme, after a three-dimensional printer uses above-mentioned detection device, in control unit controls the material-feeding rolling wheels rotary course of three-dimensional printer, when the detection data of the first photoelectric sensor show that the first detection wheel stops the rotation, show that blocking occurs in printing nozzle, feeding device lacks molding silk, or material-feeding rolling wheels stops the rotation；If the detection data of the first photoelectric sensor show the rotary speed of the first detection wheel less than desired speed, show that Partial Blocking occurs in printing nozzle, at this moment control unit control printhead quits work, thus sky is beaten or print quality is the highest to prevent three-dimensional printer from occurring.Additionally, due to the distance between axles of squeezing roller and positioning roller is become little by the restoring force effect of spring, make this detection device can be suitable for the three-dimensional printer using different-diameter specification molding silk.
First concrete scheme is the import or export that base is provided with for the turnover of molding silk, is provided with the second photoelectric sensor near import or export, and this second photoelectric sensor is used for detecting whether import or export has molding silk.
From above scheme, comprehensive second photoelectric sensor and the detection data of the first photoelectric sensor, it is known that whether the first detection wheel stops the rotation owing to feeding device lacks what molding silk caused, it is simple to user is quickly fixed a breakdown.
Second concrete scheme is for also including that the 3rd detector unit, the 3rd detector unit include the 3rd detection wheel and the 3rd photoelectric sensor, and the 3rd detection wheel is for coaxially connected with angle speed ground with the material-feeding rolling wheels in printhead；3rd detection wheel includes base portion and the occlusion part circumferentially along base portion, and the light path of the 3rd photoelectric sensor rotates, around the axis of the 3rd detection wheel, the plane formed through occlusion part.
From above scheme, by judging the detection data of the 3rd photoelectric sensor, it can be determined that whether cause stopping printing owing to material-feeding rolling wheels stops the rotation.
Preferably scheme is that a swing arm swingingly can be fixed on base around its one end, squeezing roller is rotatably mounted in the other end of swing arm, and spring is torsion spring, and the torsion circle of torsion spring is fixed on base, one torque arm of torsion spring is pressed in the rotating shaft of squeezing roller, and another torque arm is pressed on the medial wall of base.
In order to realize above-mentioned another object, the present invention provides the first three-dimensional printer, this three-dimensional printer includes printhead, control unit, feeding device and detection device, wherein, detection device is the detection device described by above-mentioned main technical schemes, along the direct of travel of molding silk, detection device is positioned at the upstream of printhead, and the first photoelectric sensor electrically connects with control unit.
In order to realize above-mentioned another object, the present invention provides the second three-dimensional printer, and this three-dimensional printer includes printhead, control unit, feeding device and detection device, and wherein, detection device is the detection device described in above-mentioned first concrete scheme；Along the direct of travel of molding silk, detection device is positioned at the upstream of printhead, and the first photoelectric sensor and the second photoelectric sensor electrically connect with control unit；This three-dimensional printer also includes the fault alarm electrically connected with control unit and lacks material alarm.
In order to realize above-mentioned another object, the present invention provides the third three-dimensional printer, this three-dimensional printer includes printhead, control unit, feeding device and detection device, wherein, this detection device is the detection device described in above-mentioned second concrete scheme, along the direct of travel of molding silk, detection device is positioned at the upstream of printhead, and the first photoelectric sensor, the second photoelectric sensor and the 3rd photoelectric sensor electrically connect with control unit.
In order to realize above-mentioned a further object, the present invention provides a kind of 3 D-printing method, this Method of printing uses the first three-dimensional printer above-mentioned to carry out printing three-dimensional body, during material-feeding rolling wheels in control unit controls printhead rotates, when the first photoelectric sensor detects that the first detection wheel stops the rotation or its rotating speed is less than desired speed, control unit controls printhead and quits work.
In order to realize above-mentioned a further object, the present invention provides a kind of 3 D-printing method, this Method of printing uses above-mentioned the second three-dimensional printer to carry out printing three-dimensional body, during printing three-dimensional body, time at the import or export that the second photoelectric sensor detects detection device without molding silk, control unit controls printhead and quits work and start scarce material alarm；During material-feeding rolling wheels in control unit controls printhead rotates, when the first photoelectric sensor detects that the first detection wheel stops the rotation or its rotating speed is less than desired speed, control unit controls printhead and quits work and startup separator alarm.
In order to realize above-mentioned a further object, the present invention provides a kind of 3 D-printing method, this Method of printing uses the third three-dimensional printer above-mentioned to carry out printing three-dimensional body, during printing three-dimensional body, time at the import or export that the second photoelectric sensor detects detection device without molding silk, control unit controls printhead and quits work；During material-feeding rolling wheels in control unit controls printhead rotates, when the first photoelectric sensor detects that the first detection wheel stops operating or its rotating speed is less than desired speed, control unit controls printhead and quits work, when the 3rd photoelectric sensor detects that the 3rd detection wheel stops operating, control unit controls printhead and quits work.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of existing three-dimensional printer；
Fig. 2 is the axonometric chart of three-dimensional printer first embodiment of the present invention；
Fig. 3 is the axonometric chart at another visual angle of Fig. 2；
Fig. 4 is the structure chart that the present invention detects device first embodiment；
Fig. 5 is that the present invention detects in device first embodiment and to coordinate schematic diagram between squeezing roller with base；
Fig. 6 is that the present invention detects device first embodiment and omits the structure chart of base；
Fig. 7 is the detection data time sequence figure that the present invention detects device first embodiment；
Fig. 8 is the structure chart that the present invention detects device the second embodiment；
Fig. 9 is the structure chart that the present invention detects device the 3rd embodiment；
Figure 10 is that the present invention detects in device sixth embodiment and to coordinate schematic diagram between squeezing roller with base.
Below in conjunction with drawings and Examples, the invention will be further described.
Detailed description of the invention
Detection device, three-dimensional printer and 3 D-printing method first embodiment
Seeing Fig. 2, three-dimensional printer 1 has housing 11 and the object stage 12 being installed on housing 11, printhead 13, feeding device 14, detection device and control unit.The molding silk of feeding device 14 is supplied to printhead 13 by flexible pipe 15, and control unit is electrically connected with the electric elements on printhead 13 by control line 16.
See Fig. 3, detection device 17 is installed in the back plate 111 of housing 11, the molding silk of feeding device 14 detects device 17 by leading into of flexible pipe 18, by entering printhead 13 after detection device 17 under the guiding of flexible pipe 15, i.e. on the direct of travel along molding silk, detection device 17 is positioned at the upstream of printhead 13.
Seeing Fig. 4, detection device 17 is made up of base 171, swing arm and the first detector unit, and the first detector unit is made up of positioning roller 172, squeezing roller 173, first detection wheel the 174, first photoelectric sensor 175 and torsion spring 176.Detection device 17 is installed in the back plate 111 of three-dimensional printer by base 171.First detection wheel 174 is constituted by base portion 1741 and around the base portion 1741 uniform occlusion part 1742 of circumference.Positioning roller 172 and squeezing roller 173 are rotatably mounted on base 171, and the first detection wheel 174 is coaxially connected with squeezing roller 173 isogonism speed ground.First photoelectric sensor 175 is made up of light source, light path and photoelectric cell, and photoelectric cell electrically connects with control unit, and light path rotates, around the first detection wheel 174 axis, the plane formed through occlusion part 1742.The torsion circle of torsion spring 176 is fixed on base 171 by fixture 1711, and a torque arm is pressed in the rotating shaft of squeezing roller 173, and another torque arm is pressed on the medial wall of base 171.
Seeing Fig. 5, swing arm 1713 can be rotatably secured on base 171 around its one end by fixture 1712, and squeezing roller 173 can 177 be rotatably mounted on the other end of swing arm 1712 around the shaft.
Seeing Fig. 6, a torque arm 1761 of torsion spring 176 is pressed in rotating shaft 177；The passage of molding silk 141 it is formed with between the work surface of positioning roller 172 and the work surface of squeezing roller 173；Due to the effect of torsion spring 176 restoring force, sky be beaten, printing nozzle Partial Blocking or feeding device lack material and detect to force detection device 17 three-dimensional printer using different-diameter specification molding silk 141 can occur.During three-dimensional printer 1 prints, control unit controls the material-feeding rolling wheels in printhead 13 and rotates, molding silk 141 is pulled to advance, molding silk 141 drives again positioning roller 172 and squeezing roller 173 to rotate, thus drive the first detection wheel 174 rotation, detect data normally from the first photoelectric sensor 175 output services.
See Fig. 7, during material-feeding rolling wheels in control unit controls printhead 13 normally rotates, the molding silk 141 advanced drives squeezing roller 173 to rotate, thus drive the first detection wheel 174 rotation, the waveform of the first photoelectric sensor 175 output is A, it is the detection data of normal work, i.e. the data of desired speed；When Partial Blocking occurs in printing head, the rotary speed of the first detection wheel 174 is slack-off, and the waveform of the first photoelectric sensor 175 output is B；When printing head occurs that moulding material occur lacking in blocking, feeding device 14 or material-feeding rolling wheels does not rotates, now the first detection wheel 174 stops the rotation, and the waveform of the first photoelectric sensor 175 output is C or D.During control unit control material-feeding rolling wheels is normally carried out carrying molding silk, when the detection signal that detection device feeds back to control unit is different from the waveform A preset, when i.e. there is signal B, C or D, control unit controls printhead 12 and quits work, and user informed by startup separator alarm.
Detection device, three-dimensional printer and 3 D-printing method the second embodiment
As the present invention being detected device, three-dimensional printer and the explanation of 3 D-printing method the second embodiment, the most only the difference with above-mentioned detection device, three-dimensional printer and 3 D-printing method first embodiment is illustrated.
This three-dimensional printer has two printheads, for printing the molding silk of two kinds of different sizes.
Seeing Fig. 8, detection device 27 has two the first detector units, is correspondingly used for detecting the conveying condition of molding silk 2411 and 2412.Import department at detection device 27 is provided with the guide groove 282 guiding molding wire rows to enter, and exit is provided with the guide groove 281 guiding molding wire rows to enter.
Detection device, three-dimensional printer and 3 D-printing method the 3rd embodiment
As the present invention being detected device, three-dimensional printer and the explanation of 3 D-printing method the 3rd embodiment, the most only the difference with above-mentioned detection device, three-dimensional printer and 3 D-printing method first embodiment is illustrated.
Seeing Fig. 9, be provided with the second photoelectric sensor 379 near the import of detection device 37, the second photoelectric sensor 379 is used for detecting whether import department has molding silk 341.Such that it is able to judge whether feeding device lacks molding silk.
Detection device, three-dimensional printer and 3 D-printing method the 4th embodiment
As the present invention being detected device, three-dimensional printer and the explanation of 3 D-printing method the 4th embodiment, the most only the difference with above-mentioned detection device, three-dimensional printer and 3 D-printing method the 3rd embodiment is illustrated.
Second photoelectric sensor is located near the outlet of detection device.
Detection device, three-dimensional printer and 3 D-printing method the 5th embodiment
As the present invention being detected device, three-dimensional printer and the explanation of 3 D-printing method the 5th embodiment, the most only the difference with above-mentioned detection device, three-dimensional printer and 3 D-printing method the 3rd embodiment is illustrated.
Being additionally provided with the fault alarm electrically connected with control unit on three-dimensional printer and lack material alarm, when detecting device and detecting that feeding device lacks molding silk, control unit starts scarce material alarm, startup separator alarm in the case of other.
Detection device, three-dimensional printer and 3 D-printing method sixth embodiment
As the present invention being detected device, three-dimensional printer and the explanation of 3 D-printing method sixth embodiment, the most only the difference with above-mentioned detection device, three-dimensional printer and 3 D-printing method first embodiment is illustrated.
On material-feeding rolling wheels isogonism be coaxially connected with fastly the 3rd detection wheel, the 3rd detection wheel by by base portion and around base portion circumference uniform occlusion part constitute, the light path of the 3rd photoelectric sensor through occlusion part around the 3rd detection wheel axis rotate formed plane；3rd detection wheel and the 3rd photoelectric sensor constitute the 3rd detector unit of detection device.
May determine that whether material-feeding rolling wheels stops the rotation by the detection data of the 3rd photoelectric sensor.
Detection device, three-dimensional printer and 3 D-printing method the 7th embodiment
As the present invention being detected device, three-dimensional printer and the explanation of 3 D-printing method the 7th embodiment, the most only the difference with above-mentioned detection device, three-dimensional printer and 3 D-printing method first embodiment is illustrated.
See Figure 10, swing arm is substituted with chute 4712, squeezing roller 473 is rotatably mounted in its rotating shaft 477, rotating shaft 477 can be installed in chute 4712 movably along chute 4712, one end of one spring is fixed on base, the other end is pressed in rotating shaft 477, thus by squeezing roller 473 near the extruding of the direction of positioning roller.
Claims (9)
1. detection device, for three-dimensional printer, including base and the first detector unit；
It is characterized in that:
Described first detector unit includes the first detection wheel, spring, the first photoelectric sensor and is rotatably mounted in the positioning roller on described base and squeezing roller；
The axis of described squeezing roller is parallel with the axis of described positioning roller and distance between axles is adjustable, and the restoring force of described spring forces described distance between axles to become little, is formed with the passage of molding silk between the work surface of described squeezing roller and the work surface of described positioning roller；
Described first detection wheel with described squeezing roller or described positioning roller with the most coaxial connection of angle speed, described first detection wheel includes base portion and the occlusion part circumferentially along described base portion, and the light path of described first photoelectric sensor rotates, around the axis of described first detection wheel, the plane formed through described occlusion part；
One swing arm swingingly can be fixed on described base around its one end, described squeezing roller is rotatably mounted in the other end of described swing arm, described spring is torsion spring, the torsion circle of described torsion spring is fixed on described base, one torque arm of described torsion spring is pressed in the rotating shaft of described squeezing roller, and another torque arm is pressed on the medial wall of described base.
Detect device the most according to claim 1, it is characterised in that:
Described base is provided with the inlet and outlet for the turnover of described molding silk, described import or described outlet be nearby provided with the second photoelectric sensor, described second photoelectric sensor is used for detecting described import or whether described outlet has molding silk.
Detect device the most according to claim 2, it is characterised in that:
Also including that the 3rd detector unit, described 3rd detector unit include the 3rd detection wheel and the 3rd photoelectric sensor, described 3rd detection wheel is for the most coaxially connected with angle speed with the material-feeding rolling wheels in the printhead of three-dimensional printer；
Described 3rd detection wheel includes base portion and the occlusion part circumferentially along base portion, and the light path of described 3rd photoelectric sensor rotates, around the axis of described 3rd detection wheel, the plane formed through occlusion part.
4. three-dimensional printer, including printhead, control unit and feeding device；
It is characterized in that:
Detection device, described detection device is detection device described in claim 1；
Along the direct of travel of molding silk, described detection device is positioned at the upstream of described printhead；
Described first photoelectric sensor electrically connects with described control unit.
5. three-dimensional printer, including printhead, control unit and feeding device；
It is characterized in that:
Detection device, described detection device is detection device described in claim 2；
Along the direct of travel of molding silk, described detection device is positioned at the upstream of described printhead；
Described first photoelectric sensor and described second photoelectric sensor electrically connect with described control unit；
Also include the fault alarm electrically connected with described control unit and lack material alarm.
6. three-dimensional printer, including printhead, control unit and feeding device；
It is characterized in that:
Detection device, described detection device is detection device described in claim 3；
Along the direct of travel of molding silk, described detection device is positioned at the upstream of described printhead；
Described first photoelectric sensor, described second photoelectric sensor and described 3rd photoelectric sensor electrically connect with described control unit.
7. 3 D-printing method, uses three-dimensional printer described in claim 4 to carry out printing three-dimensional body；
It is characterized in that:
During material-feeding rolling wheels in described control unit controls described printhead rotates, when described first photoelectric sensor detects that described first detection wheel stops the rotation or its rotating speed is less than desired speed, described control unit controls described printhead and quits work.
8. 3 D-printing method, uses three-dimensional printer described in claim 5 to carry out printing three-dimensional body；
It is characterized in that:
During printing described three-dimensional body, when described second photoelectric sensor detects described import or described exit without molding silk, described control unit controls described printhead and quits work and start described scarce material alarm；
During material-feeding rolling wheels in described control unit controls described printhead rotates, when described first photoelectric sensor detects that described first detection wheel stops the rotation or its rotating speed is less than desired speed, described control unit controls described printhead and quits work and start described fault alarm.
9. 3 D-printing method, uses three-dimensional printer described in claim 6 to carry out printing three-dimensional body；
It is characterized in that:
During printing described three-dimensional body, when described second photoelectric sensor detects described import or described exit without molding silk, described control unit controls described printhead and quits work；
During described control unit controls the rotation of described material-feeding rolling wheels,
When described first photoelectric sensor detects that described first detection wheel stops operating or its rotating speed is less than desired speed, described control unit controls described printhead and quits work；
When described 3rd photoelectric sensor detects that described 3rd detection wheel stops operating, described control unit controls described printhead and quits work.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410827191.9A CN104552946B (en) | 2014-12-24 | 2014-12-24 | Detection device, three-dimensional printer and 3 D-printing method |
| CN201610569577.3A CN105922600B (en) | 2014-12-24 | 2014-12-24 | Detection means, three-dimensional printer and 3 D-printing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410827191.9A CN104552946B (en) | 2014-12-24 | 2014-12-24 | Detection device, three-dimensional printer and 3 D-printing method |
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| CN201610569577.3A Division CN105922600B (en) | 2014-12-24 | 2014-12-24 | Detection means, three-dimensional printer and 3 D-printing method |
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| CN104552946A CN104552946A (en) | 2015-04-29 |
| CN104552946B true CN104552946B (en) | 2016-09-28 |
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| CN201410827191.9A Active CN104552946B (en) | 2014-12-24 | 2014-12-24 | Detection device, three-dimensional printer and 3 D-printing method |
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| CN105922600B (en) | 2017-08-15 |
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Effective date of registration: 20220907 Address after: Room 103-036, 1st Floor, Building 1, No. 18, Futian Road, Xiangzhou District, Zhuhai City, Guangdong Province, 519000 (centralized office area) Patentee after: Zhuhai Tianwei Additives Co.,Ltd. Address before: 519060 Guangdong province Zhuhai Nanping Science and Technology Industrial Park, ping North Road No. 32 Patentee before: PRINT RITE UNICORN IMAGE PRODUCTS Co.,Ltd. OF ZHUHAI |