CN108098556A - A kind of burnishing device and polishing method of 3D glass plates - Google Patents
A kind of burnishing device and polishing method of 3D glass plates Download PDFInfo
- Publication number
- CN108098556A CN108098556A CN201611021624.7A CN201611021624A CN108098556A CN 108098556 A CN108098556 A CN 108098556A CN 201611021624 A CN201611021624 A CN 201611021624A CN 108098556 A CN108098556 A CN 108098556A
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- CN
- China
- Prior art keywords
- polishing
- glass plates
- polishing rod
- width
- glass
- 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.)
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Links
- 238000005498 polishing Methods 0.000 title claims abstract description 86
- 239000011521 glass Substances 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000005086 pumping Methods 0.000 claims abstract description 8
- 238000005452 bending Methods 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims description 6
- 238000007517 polishing process Methods 0.000 claims description 6
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000011094 fiberboard Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
- B24D9/04—Rigid drums for carrying flexible material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The present invention provides a kind of burnishing device of 3D glass plates,The 3D glass plates are the length of plate face or the both ends of width towards the curved glass plate in same direction,The burnishing device includes high score daughter backplane,Curved surface rubber slab and polishing rod,The vacuum pumping channel of 3D glass plates is fixed when further including for polishing,The high score daughter backplane contains to house curved surface rubber slab and the cavity to the positioning of 3D glass plates,The curved surface rubber slab includes curved top surface and is used to support the 3D glass plates,The polishing rod includes cylinder steel core and the buffing skin being fixed on its periphery,The polishing rod is arranged on 3D glass plates and by external force polishing rod is driven to rotate the buffing skin of polishing rod and the polishing of 3D contact glass sheets,The polishing rod also moves while rotating along the length direction or width of 3D bending glass sheets.The polishing yield that the present invention greatly improves 3D glass plates thus significantly reduces polishing cost.
Description
Technical field
The present invention relates to glass processing fields, and in particular to a kind of burnishing device and polishing method of 3D glass plates.
Background technology
In the prior art, conventional glass polishing equipment is rotated backward including upper lower millstone, with diamond micro-powdered polishing liquid
Collective effect is polished glass.In polishing process, hairbrush is provided on upper millstone.In this way to the plate of glass
Face carries out plain grinding polishing.Because the special-purpose polishing equipment only has several fixed modes to polish, traditional polissoir and polishing mode
It can only all around move along a straight line up and down when polishing 3D free form surface glass plates, polissoir can not be with 3D in polishing process
Free form surface coincide, and the high point of 3D glass plates is different from the stress of low spot, the cutting output of polishing is also different, the height of D glass plates
Point from upper disk immediate cause and pressure is slightly larger, and low spot from upper disk slightly remote cause and pressure is smaller.And in polishing process 3D glass plates from
Management and control is difficult to by the radian of curved surface.Such scheme so that when polishing 3D glass plates polishing obtains the yield of qualified products not
Height, along with the utilization ratio of the materials such as polishing fluid, mill and hairbrush in which is not high, and artificial, water, electricity etc. are of high cost
It is high, thus cause 3D sheet products price made from polishing method in this way.
Therefore, this field is it is necessary to provide a kind of burnishing device and polishing method of new 3D glass plates, to ensure 3D glass
The radian and polishing yield of glass plate free form surface and the polishing cost that the 3D glass plates are greatly reduced.
The content of the invention
Therefore, the present invention provides a kind of burnishing device of 3D glass plates, and the 3D glass plates are the length or width of plate face
The both ends in direction towards the curved glass plate in same direction, the burnishing device include high score daughter backplane, curved surface rubber slab and
Polishing rod further includes the vacuum suction being arranged on high score daughter backplane and curved surface rubber slab and for fixing 3D glass plates when polishing
Passage, the high score daughter backplane contain to house curved surface rubber slab and the cavity to the positioning of 3D glass plates, the curved surface rubber
Plate includes curved top surface and is used to support the 3D glass plates, and the polishing rod includes cylinder steel core and is fixed at outside it
Buffing skin on disc, the polishing rod are arranged on 3D glass plates and by external force polishing rod are driven to rotate polishing rod
Buffing skin and 3D contact glass sheets polish, the polishing rod while rotating also along 3D bending glass sheets length direction or
Width moves, and the polishing fluid used in polishing process is diamond micro-powdered polishing liquid.
In the present invention, the hardness of the rubber slab 2 and high score daughter backplane 1 forms good matching, in conjunction with certain
The polishing rod of material so that the burnishing device can efficiently polish out qualified 3D sheet products.In the present invention, the brill
The average grain diameter of stone micro mist is 1~20 micron, preferably 3~10 microns.
In a kind of specific embodiment, the high score daughter backplane is fiberboard or match steel plate.Inventor passes through experiment
It was found that if replacing heretofore described high score daughter backplane with steel plate, can not be provided for the 3D sheet products in the present invention
Suitable polishing hardness, the result is that the polishing product that cannot be meeted the requirements.Likewise, the cylindrical steel in the polishing rod 3
If core 31 with aluminium alloy or titanium alloy when other metal materials replace, because its hardness and density are different from steel, equally
It is difficult to obtain qualified 3D glass plates polishing product.
In a kind of specific embodiment, the buffing skin by paste adhesive cylinder steel core periphery.
In a kind of specific embodiment, the thickness of the buffing skin is 1~5mm, preferably 2~4mm.
In a kind of specific embodiment, moved in the length direction or width of polishing rod towards 3D glass plates
In the direction of motion, the width of the buffing skin is more than or equal to the width or length of the 3D glass plates.
In a kind of specific embodiment, the width of the buffing skin is bigger than the width or length of the 3D glass plates
0.5~2mm.
In a kind of specific embodiment, a diameter of 1~10cm of the cylinder steel core, preferably 2~5cm, more preferably
2.5~3cm.
In a kind of specific embodiment, the thickness d 1 at the thickness minimum of the curved surface rubber slab is 0.2~2mm,
The thickness d 2 of its thickness maximum is 1.2~5mm, and the difference between d2 and d1 is more than or equal to 1mm；It is preferred that d1 for 0.3~
0.7mm, d2 are 2~4mm；It is preferred that the curved surface rubber slab is soft rubber plate.It is described true in a kind of specific embodiment
Empty bleed-off passage is through hole and/or straight slot.
The present invention also provides a kind of corresponding polishing method of above device, including making the polishing rod high-speed rotating same
When moved along the bending length direction or width on the upper convex surface of the 3D glass plates, and polishing fluid is used in combination to the 3D
Glass plate polishes；It is preferred that the polishing rod velocity of rotation is 1000~2000r/min, the polishing rod is along the 3D glass plates
The bending length direction on upper convex surface or width translational speed are 0.3~0.5m/min.
Advantageous effect：Burnishing device debugging of the present invention is convenient and efficient, need not adjust machine after debugging is good, only need regular
Replace the i.e. repeatable polishing of buffing skin in polishing rod；The device clamping product speed is fast and precision is high, repetitive positioning accuracy
It is good.The polishing product curved surface profile degree and radian obtained using burnishing device of the present invention is accurate, and the two is in the mark of product
In quasi- scope.The polishing yield that the present invention greatly improves 3D glass plates thus significantly reduces polishing cost.
Description of the drawings
Fig. 1 is the structure diagram of heretofore described 3D glass plates burnishing device.
In figure：01st, 3D glass plates, 1, high score daughter backplane, 11, cavity, 2, curved surface rubber slab, 3, polishing rod, 31, cylindrical steel
Core, 32, buffing skin, 4, vacuum pumping channel.
Specific embodiment
The present invention provides a kind of burnishing device of 3D glass plates, and the 3D glass plates are the both ends court of the length direction of plate face
To the curved glass plate in same direction, the burnishing device includes high score daughter backplane 1 (fiberboard), curved surface rubber slab 2 and throws
Optical wand 3 further includes and is arranged on high score daughter backplane 1 and curved surface rubber slab 2 and is taken out for fixing the vacuum of 3D glass plates when polishing
Gas passage 4, the high score daughter backplane 1, which contains, is useful for accommodating curved surface rubber slab 2 and the cavity 11 to the positioning of 3D glass plates, the song
Face rubber slab 2 includes curved top surface and is used to support the 3D glass plates 01, and the polishing rod is including cylinder steel core 31 and admittedly
Surely the buffing skin 32 being arranged on its periphery, the polishing rod 3 are arranged on 01 top of 3D glass plates and are driven by external force and thrown
Optical wand rotates so that the buffing skin of polishing rod is polished with 3D contact glass sheets, and the polishing rod is while rotating also along 3D glass
The length direction of plate benging moves, and the polishing fluid used in polishing process is diamond micro-powdered polishing liquid.
In a kind of specific embodiment, as shown in Figure 1, the generous size of length of the 3D glass plates be respectively 4cm,
2cm and 1cm, the thickness of the buffing skin is 3mm, width 3cm, and the length of buffing skin is the package cylinder steel core one
Circle, a diameter of 2.5~3cm of the cylinder steel core；And buffing skin is tightly pasted onto on the periphery of cylinder steel core.The 3D
When the concave surface of glass is placed on the convex curvature of curved surface rubber slab, the both ends of the length direction of 3D glass plates are relatively low, it is intermediate compared with
Height, the height of width are throughout consistent.In the present invention, the size of the curved surface rubber slab and the adjoining dimensions of 3D glass
Or it is identical, one effect scratches glass plate when being and preventing glass from being contacted with the cavity of high score daughter backplane, another effect is institute
It states the high score daughter backplane mating reaction of rubber slab and hard and provides most suitable hardness and polishing force for the polishing of glass plate.
In a kind of specific embodiment, the two-end thickness of the curved surface rubber slab length direction is 0.5mm, and the middle part of length direction
Thickness be 3mm.In the present invention, the high score daughter backplane 1, which plays, carries out curved surface rubber slab 2 and polished 3D glass plates 01
The effect of positioning.
Vacuum pumping channel 4 is both provided on the high score daughter backplane 1 and curved surface rubber slab 2, in a kind of specific implementation
In mode, the vacuum pumping channel is multiple equally distributed vacuum pumping holes, in a further mode of operation, the vacuum suction
Passage is the vacuum suction straight slot of horizontal distribution so that the high score daughter backplane 1 and curved surface rubber slab 2 are in Openworks shape.It utilizes
Negative pressure in duct or straight slot tightly adsorbs glass on rubber slab and inside cavity 11.It likewise, also can be by both
Structure is combined and is arranged on high score daughter backplane 1 and/or curved surface rubber slab 2.For example, on curved surface rubber slab 2, close to its bottom surface
Vacuum pumping channel 4 described in region is the straight slot structure of horizontal distribution, and is and the vacuum suction close to the region of its top surface
The equally distributed a plurality of vertical through holes structure that passage 4 connects is connected by horizontal straight slot between that is, each vertical through holes.This field
Technical staff is readily appreciated that ground, and the upper surface of the curved surface rubber slab 2 set in the cavity of the high score daughter backplane 1 is curved surface, is had
Body is upper convex surface, and radian and the concave radian of 3D glass plates of curved surface are consistent so that the rubber slab can be firmly
Support the polishing of the 3D glass plates.In a kind of specific embodiment, the polishing rod 3 is same high speed rotation polishing
When, its other end (curve movement) is slowly moved in one end of 3D glass plate length directions.In a kind of specific embodiment party
In formula, the bottom surface in cavities bear face and the curved surface rubber slab 2 in the high score daughter backplane 1, which is disposed as plane, to be met
It is required that.In a kind of specific embodiment, one end of the polishing rod is its polished end, skilled addressee readily understands that
Ground, the cylinder steel core 31 and buffing skin 32 are arranged at the polished end of polishing rod.In the present invention, the polished end of the polishing rod
For flexible glue rubbing head, specifically cylinder steel core 31 is rigid core and buffing skin 32 is soft outer.The buffing skin is using
After the time of one end, what is more renewed continues to polish.
In a kind of specific embodiment, horizontal CNC machine equipment further includes good in addition to including above-mentioned burnishing device
Iron horizontal precision lathe, for padded and cause polishing rod come into full contact with 3D glass round platform triangulation location frame, for padded
With round log, integrated form filtering vacuum getter device and the computer numerical control device for setting vacuum pumping hole.To the 3D glass
The polishing programmed of plate, and 3D glass plate vacuum suctions are fixed on burnishing device, polishing program, control are imported by lathe
Polishing rod processed does three axis (X, Y and Z) and moves the polishing that can be realized to 3D glass plates.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of burnishing device of 3D glass plates, the 3D glass plates are the length of plate face or the both ends of width towards same
A curved glass plate in direction, the burnishing device include high score daughter backplane (1), curved surface rubber slab (2) and polishing rod (3), also
Including being arranged on high score daughter backplane (1) and curved surface rubber slab (2) and for polishing when fixes the vacuum suctions of 3D glass plates and leads to
Road (4), the high score daughter backplane (1), which contains, is useful for accommodating curved surface rubber slab (2) and the cavity (11) to the positioning of 3D glass plates, institute
It states curved surface rubber slab (2) to include curved top surface and be used to support the 3D glass plates (01), the polishing rod includes cylindrical steel
Core (31) and the buffing skin (32) being fixed on its periphery, the polishing rod (3) are arranged on above 3D glass plates (01)
And by external force the buffing skin of polishing rod rotation polishing rod being driven to be polished with 3D contact glass sheets, the polishing rod is rotating
While also moved along the length direction or width of 3D bending glass sheets, the polishing fluid used in polishing process for diamond it is micro-
Powder polishing fluid.
2. device according to claim 1, which is characterized in that the high score daughter backplane is fiberboard or match steel plate.
3. device according to claim 1, which is characterized in that the buffing skin by paste adhesive cylinder steel core outer circle
Face.
4. device according to claim 1, which is characterized in that the thickness of the buffing skin is 1~5mm, preferably 2~4mm.
5. device according to claim 1, which is characterized in that in length direction of the polishing rod towards 3D glass plates or width side
In the direction of motion of movement, the width of the buffing skin is more than or equal to the width or length of the 3D glass plates.
6. device according to claim 5, which is characterized in that the width of the buffing skin than the 3D glass plates width or
Big 0.5~the 2mm of length.
7. device according to claim 1, which is characterized in that a diameter of 1~10cm of the cylinder steel core, preferably 2~
5cm, more preferable 2.5~3cm.
8. device according to claim 1, which is characterized in that the thickness d 1 at the thickness minimum of the curved surface rubber slab (2)
For 0.2~2mm, the thickness d 2 of thickness maximum is 1.2~5mm, and the difference between d2 and d1 is more than or equal to 1mm；It is preferred that
D1 is 0.3~0.7mm, and d2 is 2~4mm；It is preferred that the curved surface rubber slab (2) is soft rubber plate.
9. according to any one described device in claim 1~8, which is characterized in that the vacuum pumping channel (4) is through hole
And/or straight slot.
10. a kind of corresponding polishing method of any one described device in such as claim 1~9, including the polishing rod is made to exist
The bending length direction on upper convex surface high-speed rotating while along the 3D glass plates or width move, and throwing is used in combination
Light liquid polishes the 3D glass plates；It is preferred that the polishing rod velocity of rotation is 1000~2000r/min, the polishing rod is along institute
It is 0.3~0.5m/min to state the bending length direction on the upper convex surface of 3D glass plates or width translational speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611021624.7A CN108098556A (en) | 2016-11-21 | 2016-11-21 | A kind of burnishing device and polishing method of 3D glass plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611021624.7A CN108098556A (en) | 2016-11-21 | 2016-11-21 | A kind of burnishing device and polishing method of 3D glass plates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108098556A true CN108098556A (en) | 2018-06-01 |
Family
ID=62203570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611021624.7A Withdrawn CN108098556A (en) | 2016-11-21 | 2016-11-21 | A kind of burnishing device and polishing method of 3D glass plates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108098556A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111390739A (en) * | 2020-03-31 | 2020-07-10 | 东莞泰升玻璃有限公司 | Double-side polishing device for curved glass |
| CN113084599A (en) * | 2021-04-02 | 2021-07-09 | 成都光明光电股份有限公司 | Processing method of glass rod |
| CN114473736A (en) * | 2022-02-25 | 2022-05-13 | 索菲丝智能科技(上海)有限公司 | Clamp and polishing equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5615315A (en) * | 1979-07-18 | 1981-02-14 | Takayasu Kakimoto | Holder for synthetic resin polishing bar |
| JPH06312360A (en) * | 1993-04-26 | 1994-11-08 | Central Glass Co Ltd | Power feeding/terminal part grinder for glass plate face |
| JP2013112554A (en) * | 2011-11-28 | 2013-06-10 | Nippon Electric Glass Co Ltd | Glass plate polishing apparatus |
| CN103481181A (en) * | 2012-06-08 | 2014-01-01 | 株式会社新韩电子 | Surface-grinding apparatus for glass with cruved surface |
| KR20150142507A (en) * | 2014-06-12 | 2015-12-22 | 나노텍 주식회사 | Curved glass surface polishing device |
| KR101621333B1 (en) * | 2015-02-06 | 2016-05-16 | 나노텍 주식회사 | Curved tempered glass surface polishing machine |
| CN206185671U (en) * | 2016-11-21 | 2017-05-24 | 蓝思科技（长沙）有限公司 | Burnishing device of 3D glass board |
-
2016
- 2016-11-21 CN CN201611021624.7A patent/CN108098556A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5615315A (en) * | 1979-07-18 | 1981-02-14 | Takayasu Kakimoto | Holder for synthetic resin polishing bar |
| JPH06312360A (en) * | 1993-04-26 | 1994-11-08 | Central Glass Co Ltd | Power feeding/terminal part grinder for glass plate face |
| JP2013112554A (en) * | 2011-11-28 | 2013-06-10 | Nippon Electric Glass Co Ltd | Glass plate polishing apparatus |
| CN103481181A (en) * | 2012-06-08 | 2014-01-01 | 株式会社新韩电子 | Surface-grinding apparatus for glass with cruved surface |
| KR20150142507A (en) * | 2014-06-12 | 2015-12-22 | 나노텍 주식회사 | Curved glass surface polishing device |
| KR101621333B1 (en) * | 2015-02-06 | 2016-05-16 | 나노텍 주식회사 | Curved tempered glass surface polishing machine |
| CN206185671U (en) * | 2016-11-21 | 2017-05-24 | 蓝思科技（长沙）有限公司 | Burnishing device of 3D glass board |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111390739A (en) * | 2020-03-31 | 2020-07-10 | 东莞泰升玻璃有限公司 | Double-side polishing device for curved glass |
| CN111390739B (en) * | 2020-03-31 | 2021-07-02 | 东莞泰升玻璃有限公司 | Double-side polishing device for curved glass |
| CN113084599A (en) * | 2021-04-02 | 2021-07-09 | 成都光明光电股份有限公司 | Processing method of glass rod |
| CN114473736A (en) * | 2022-02-25 | 2022-05-13 | 索菲丝智能科技(上海)有限公司 | Clamp and polishing equipment |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180601 |