CN110193596A - A kind of metallic silicon automatic casting production equipment - Google Patents

A kind of metallic silicon automatic casting production equipment Download PDF

Info

Publication number
CN110193596A
CN110193596A CN201910414839.2A CN201910414839A CN110193596A CN 110193596 A CN110193596 A CN 110193596A CN 201910414839 A CN201910414839 A CN 201910414839A CN 110193596 A CN110193596 A CN 110193596A
Authority
CN
China
Prior art keywords
fixedly installed
metallic silicon
production equipment
casting
deadhead
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.)
Pending
Application number
CN201910414839.2A
Other languages
Chinese (zh)
Inventor
高中明
魏奎先
凌勇
徐慧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yangzhou Yinghang Silicon Technology Co Ltd
Original Assignee
Yangzhou Yinghang Silicon Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yangzhou Yinghang Silicon Technology Co Ltd filed Critical Yangzhou Yinghang Silicon Technology Co Ltd
Priority to CN201910414839.2A priority Critical patent/CN110193596A/en
Publication of CN110193596A publication Critical patent/CN110193596A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00Equipment for conveying molten metal into beds or moulds
    • B22D35/04Equipment for conveying molten metal into beds or moulds into moulds, e.g. base plates, runners
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00Mechanical cleaning, e.g. skimming of molten metals
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D5/00Machines or plants for pig or like casting
    • B22D5/04Machines or plants for pig or like casting with endless casting conveyors

Abstract

The present invention relates to metallic silicon production equipment technologies, and disclose a kind of metallic silicon automatic casting production equipment, including conveying device, the top movable of the conveying device is equipped with casting box, support plate is fixedly installed on the right side of the conveying device back side, the positive top of support plate is fixedly installed with casting case, feed pipe is communicated at the top of casting case, the left and right sides of the casting case front bottom, which is communicated with, pours deadhead, the left and right sides of the casting case is fixedly installed with connecting plate, the bottom of connecting plate is fixedly installed with servo motor, the output shaft of servo motor is fixedly installed with gear, the front of gear is engaged with transmission device, the opposite side of transmission device is fixedly installed with pedestal, the inner bottom wall of pedestal is fixedly installed with driving motor.The metallic silicon automatic casting production equipment, overall structure is simple, and deadhead purpose easy to clean is poured in realization, to effectively prevent the inside for pouring deadhead of feed blocking, is easy to use.

Description

A kind of metallic silicon automatic casting production equipment
Technical field
The present invention relates to metallic silicon production equipment technology, specially a kind of metallic silicon automatic casting production equipment.
Background technique
Metallic silicon is also known as silicon metal or industrial silicon, is mainly used for the additive as non-ferrous alloy, and metallic silicon is By quartz and the product smelted in electrothermal furnace of coke, the content of principal component element silicon 98% or so, remaining impurity be iron, Aluminium and calcium etc..
" metallic silicon " (China is also referred to as industrial silicon) is the product name that last century middle nineteen sixties occur, it goes out Now related with the rise of semicon industry, the international practice is that commodity silicon is divided into metallic silicon and semiconductor silicon, in metallic silicon Manufacture during usually need to use automatic casting equipment, there is pour deadhead for existing automatic casting production equipment Inconvenient clean defect pours deadhead and cast after metal silicon materials, and closing device stops metallic silicon from cleaning in time Stay in the inside for pouring deadhead, cumulative for a long time, causing to pour deadhead can not cast, it has not been convenient to use.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of metallic silicon automatic casting production equipment, has casting The advantages that easy to clean, solving existing automatic casting production equipment, there is pour the inconvenient clean defect of deadhead, casting Head has been cast after metal silicon materials, closes device and metallic silicon is prevented to rest on the inside for pouring deadhead from cleaning in time, long Accumulated time gets off, and causing to pour deadhead can not cast, it has not been convenient to the problem of using.
(2) technical solution
Deadhead purpose easy to clean is poured for realization is above-mentioned, the invention provides the following technical scheme: a kind of metallic silicon automatic casting With production equipment, including conveying device, the top movable of the conveying device is equipped with casting box, the conveying device back side Right side is fixedly installed with support plate, and the positive top of support plate is fixedly installed with casting case, charging is communicated at the top of case of casting Pipe, the left and right sides of the casting case front bottom, which is communicated with, pours deadhead, and the left and right sides of the casting case is fixedly mounted There is connecting plate, the bottom of connecting plate is fixedly installed with servo motor, and the output shaft of servo motor is fixedly installed with gear, gear Front is engaged with transmission device, and the opposite side of transmission device is fixedly installed with pedestal, and the inner bottom wall of pedestal is fixedly installed with Driving motor, the output shaft of driving motor are movably installed with the cleaning rod that one end is run through and extends to base exterior, the casting The positive left and right sides of case is fixedly installed with fixing seat, and the opposite side of the transmission device is run through and extends to fixing seat Inside and be slidably connected with fixing seat, the top and bottom of the transmission device are fixedly installed with sliding block, and sliding block is opposite Side is run through and extends to the inside of fixing seat and be slidably connected with fixing seat.
Preferably, the conveying device includes the mounting plate that quantity is two, positioned at the right side for installing back described in the back side Side is fixedly installed with work drive motor, and the output shaft of the work drive motor runs through and extends to the front of back side mounting plate and fixes peace Equipped with drive roll, the front of the drive roll be fixedly installed with front mounting plate be fixedly mounted first bearing, two The left side of the mounting plate opposite side is fixedly installed with second bearing, and the inside of the second bearing is fixedly installed with driven The outside of roller, the drive roll and driven roller is sequentially connected with conveyer belt.
Preferably, the transmission device includes drive rod, and the front of the drive rod is fixedly installed with fixed block, described solid The bottom for determining block is fixedly installed with electric pushrod, and the bottom of the electric pushrod is fixedly installed with connecting rod.
Preferably, the quantity of the connecting rod is two, and for two connecting rods in being symmetrically equally spaced, the connecting rod is in L Shape, the back side of the drive rod offer tooth socket compatible with gear.
Preferably, mounting groove is offered at the top of the pedestal, the cleaning rod is made of pitman and cleaning brush, described The cleaning brush that quantity is no less than two is fixedly installed on the outside of pitman.
Preferably, the fixing seat is in U-shape, and the inside of two sidewalls is offered above and below the fixing seat is adapted with sliding block Sliding slot.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of metallic silicon automatic casting production equipments, have following beneficial Effect:
The metallic silicon automatic casting production equipment realizes that casting box moves from right to left by conveying device, by pouring Metallic silicon is cast to the inside of box body by deadhead, the decline of cleaning rod position height is driven by the starting of electric pushrod, then By the positive and negative rotation of servo motor with the positive and negative rotation of moving gear, gear is engaged with the drive rod on transmission device, Jin Ershi Existing drive rod moving left and right in fixing seat, left side servo motor rotate clockwise, and the servo motor on right side rotates counterclockwise When, then realize that two drive rods towards mobile at casting case center, and then drive two cleaning rods after decline towards pouring deadhead bottom Portion is mobile, after waiting cleaning rods to be located at the underface for pouring deadhead outlet, closes servo motor, is then turned on electric pushrod and is shunk Work drives cleaning rod by the rotation of driving motor to realize that cleaning rod height rises and extend to the inner wall for pouring deadhead Rotation, cleaning brush on the outside of cleaning rod with pour deadhead inner wall and contact and kish silicon materials are carried out to strike off work, Fang Qing Clean stick completes cleaning backed off after random and pours deadhead, and overall structure is simple, and deadhead purpose easy to clean is poured in realization, to effectively prevent The inside for pouring deadhead of feed blocking is easy to use.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention;
Fig. 2 is enlarged drawing at A in Fig. 1 of the present invention;
Fig. 3 is enlarged drawing at B in Fig. 1 of the present invention;
Fig. 4 is the attachment structure schematic diagram of gear of the present invention and transmission device;
Fig. 5 is transmission structures schematic diagram of the present invention.
In figure: deadhead, 7 connecting plates, 8 servos are poured in 1 conveying device, 2 casting boxes, 3 support plates, 4 casting casees, 5 feed pipes, 6 Motor, 9 gears, 10 transmission devices, 1001 drive rods, 1002 fixed blocks, 1003 electric pushrods, 1004 connecting rods, 11 pedestals, 12 Driving motor, 13 cleaning rods, 14 fixing seats, 15 sliding blocks.
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.
Fig. 1-5 is please referred to, the invention provides the following technical scheme: a kind of metallic silicon automatic casting production equipment, including Conveying device 1, conveying device 1 include the mounting plate that quantity is two, are fixedly installed on the right side of back side installation back Work drive motor, the model of work drive motor can be J-5718HB1403, and the output shaft of work drive motor runs through and extends to back side installation The front of plate and it is fixedly installed with drive roll, the front of drive roll is fixedly installed with the be fixedly mounted with front mounting plate One bearing, the left side of two mounting plate opposite sides are fixedly installed with second bearing, and the inside of second bearing is fixedly installed with The outside of driven roller, drive roll and driven roller is sequentially connected with conveyer belt, drives master by the rotation of work drive motor The rotation of dynamic roller, drive roll are sequentially connected by conveyer belt and driven roller, and then realize driven roller and conveyer belt Rotation, convenient to be transmitted work to casting box 2, the top movable of conveying device 1 is equipped with casting box 2,1 back side of conveying device Right side be fixedly installed with support plate 3, the positive top of support plate 3 is fixedly installed with casting case 4, the top connection of casting case 4 There is feed pipe 5, by using feed pipe 5 by metallic silicon material transmission to the inside of casting case 4, a left side for the positive bottom of case 4 of casting Right two sides, which are communicated with, pours deadhead 6, and the left and right sides of casting case 4 is fixedly installed with connecting plate 7, and the bottom of connecting plate 7 is fixed Servo motor 8 is installed, the model of servo motor 8 can be ASD-B2-0421-B, and the output shaft of servo motor 8 is fixedly installed with Gear 9, the front of gear 9 are engaged with transmission device 10, and transmission device 10 includes drive rod 1001, and the back side of drive rod 1001 is opened Equipped with tooth socket compatible with gear 9, the front of drive rod 1001 is fixedly installed with fixed block 1002, the bottom of fixed block 1002 It is fixedly installed with electric pushrod 1003, the model of electric pushrod 1003 can be LFHA12-600, electric pushrod 1003 also known as straight line Driver, a kind of novel linear executing agency being mainly made of mechanisms such as motor push rod and control devices, it is believed that be For rotating electric machine in a kind of extension of configuration aspects, the working principle of electric pushrod 1003 is motor after working gear slows down, A pair of of feed screw nut is driven, the rotation motion of motor is in line movement, using motor forward/backward rotation completion putter action, such as By compound actions such as the achievable rotation of the mechanisms such as various levers, rocking bar or connecting rod and shakes, the bottom of electric pushrod 1003 is solid Dingan County is equipped with connecting rod 1004, and the quantity of connecting rod 1004 is two, and two connecting rods 1004 are in symmetrically to be equally spaced, connecting rod 1004 is L-shaped, and the opposite side of transmission device 10 is fixedly installed with pedestal 11, and the top of pedestal 11 offers mounting groove, bottom The inner bottom wall of seat 11 is fixedly installed with driving motor 12, and the model of driving motor 12 can be STP-43D1082, driving motor 12 Output shaft is movably installed with one end and runs through and extend to the cleaning rod 13 outside pedestal 11, and cleaning rod 13 is by pitman and cleaning brush It forms, the cleaning brush that quantity is no less than two is fixedly installed on the outside of pitman, cleaning brush is the harder steel disc of quality, convenient It carries out scraping work in the material of slight solid fraction on 6 inner sidewall of deadhead to pouring, after the use time of cleaning rod 13 is longer, can incite somebody to action Cleaning rod 13 is separated with driving motor 12, and the cleaning rod 13 more renewed is used for cleaning, realizes casting box by conveying device 1 2 move from right to left, and the inside of box body is cast to by pouring deadhead 6 for metallic silicon, and the starting for passing through electric pushrod 1003 drives The decline of 13 position height of cleaning rod, then by the positive and negative rotation of servo motor 8 with the positive and negative rotation of moving gear 9, gear 9 with Drive rod 1001 on transmission device 10 engages, and then realizes the moving left and right in fixing seat 14 of drive rod 1001, and left side is watched Motor 8 is taken to rotate clockwise, when the servo motor 8 on right side rotates counterclockwise, then realize two drive rods 1001 towards casting case 4 in It is mobile at the heart, and then drive two cleaning rods 13 after decline mobile towards 6 bottom of deadhead is poured, it waits cleaning rods 13 to be located at and pours deadhead Behind the underface of 6 outlets, servo motor 8 is closed, electric pushrod 1003 is then turned on and carries out contraction work, to realize cleaning rod 13 height rise and extend to the inner wall for pouring deadhead 6, and the rotation of cleaning rod 13, cleaning rod are driven by the rotation of driving motor 12 The cleaning brush in 13 outsides with pour 6 inner wall of deadhead and contact and strike off work, the square completion of cleaning rod 13 to kish silicon materials Cleaning backed off after random pours deadhead 6, and overall structure is simple, and the purpose easy to clean of deadhead 6 is poured in realization, to effectively prevent material stifled The inside for pouring deadhead 6 of plug is easy to use, and the casting positive left and right sides of case 4 is fixedly installed with fixing seat 14, transmission device 10 opposite sides are run through and extend to the inside of fixing seat 14 and be slidably connected with fixing seat 14, the top of transmission device 10 Be fixedly installed with sliding block 15 with bottom, the opposite side of sliding block 15 run through and extend to fixing seat 14 inside and with fixation Seat 14 is slidably connected, and fixing seat 14 is in U-shape, and the inside of about 14 two sidewalls of fixing seat offers cunning compatible with sliding block 15 Slot increases stability when transmission device 10 moves horizontally by setting fixing seat 14 and sliding block 15.
In conclusion the metallic silicon automatic casting production equipment, realizes casting box 2 from right to left by conveying device 1 It is mobile, the inside of box body is cast to by pouring deadhead 6 for metallic silicon, the starting for passing through electric pushrod 1003 drives cleaning rod 13 The decline of height is set, then by the positive and negative rotation of servo motor 8 with the positive and negative rotation of moving gear 9, gear 9 and transmission device 10 On drive rod 1001 engage, and then realize the moving left and right in fixing seat 14 of drive rod 1001,8 up time of left side servo motor Needle rotation, when the servo motor 8 on right side rotates counterclockwise, then realize two drive rods 1001 towards mobile at casting 4 center of case, into And drive two cleaning rods 13 after decline mobile towards 6 bottom of deadhead is poured, wait cleaning rods 13 be located at pour the outlet of deadhead 6 just under Fang Hou closes servo motor 8, is then turned on electric pushrod 1003 and carries out contraction work, to realize that cleaning rod 13 highly rises And the inner wall for pouring deadhead 6 is extended to, and the rotation of cleaning rod 13 is driven by the rotation of driving motor 12, it is clear on the outside of cleaning rod 13 Clean brush with pour 6 inner wall of deadhead and contact and strike off work to kish silicon materials, after the square completion of cleaning rod 13 cleaning It exits and pours deadhead 6, overall structure is simple, and the purpose easy to clean of deadhead 6 is poured in realization, so that effectively prevent feed blocking pours deadhead 6 inside is easy to use, and is solved existing automatic casting production equipment there is the inconvenient clean defect of deadhead 6 is poured, is poured Deadhead 6 has been cast after metal silicon materials, closes device and metallic silicon is prevented to rest on from cleaning in time and pour the interior of deadhead 6 Portion, cumulative for a long time, causing to pour deadhead 6 can not cast, it has not been convenient to the problem of using.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that There is also other identical elements in process, method, article or equipment including the element.
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 (6)

1. a kind of metallic silicon automatic casting production equipment, including conveying device (1), it is characterised in that: the conveying device (1) Top movable casting box (2) is installed, be fixedly installed with support plate (3), support plate on the right side of conveying device (1) back side (3) positive top is fixedly installed with casting case (4), is communicated with feed pipe (5) at the top of casting case (4), the casting case (4) The left and right sides of positive bottom, which is communicated with, pours deadhead (6), and the left and right sides of casting case (4) is fixedly installed with connecting plate (7), the bottom of connecting plate (7) is fixedly installed with servo motor (8), and the output shaft of servo motor (8) is fixedly installed with gear (9), the front of gear (9) is engaged with transmission device (10), and the opposite side of transmission device (10) is fixedly installed with pedestal (11), the inner bottom wall of pedestal (11) is fixedly installed with driving motor (12), and the output shaft of driving motor (12) is movably installed with one The external cleaning rod (13) of pedestal (11) is run through and extends at end, and the positive left and right sides of the casting case (4) is fixedly mounted Have fixing seat (14), the opposite side of the transmission device (10) run through and extend to fixing seat (14) inside and with fixation Seat (14) is slidably connected, and the top and bottom of the transmission device (10) are fixedly installed with sliding block (15), and sliding block (15) is opposite Side run through and extend to the inside of fixing seat (14) and be slidably connected with fixing seat (14).
2. a kind of metallic silicon automatic casting production equipment according to claim 1, it is characterised in that: the conveying device (1) include quantity it is two mounting plates, is fixedly installed with work drive motor on the right side of installation back described in the back side, it is described The output shaft of work drive motor runs through and extends to the front of back side mounting plate and be fixedly installed with drive roll, the drive roll Front be fixedly installed with the first bearing being fixedly mounted with front mounting plate, the left side of two mounting plate opposite sides is equal It is fixedly installed with second bearing, the inside of the second bearing is fixedly installed with driven roller, the drive roll and driven rolling The outside of cylinder is sequentially connected with conveyer belt.
3. a kind of metallic silicon automatic casting production equipment according to claim 1, it is characterised in that: the transmission device It (10) include drive rod (1001), the front of the drive rod (1001) is fixedly installed with fixed block (1002), the fixed block (1002) bottom is fixedly installed with electric pushrod (1003), and the bottom of the electric pushrod (1003) is fixedly installed with connecting rod (1004)。
4. a kind of metallic silicon automatic casting production equipment according to claim 3, it is characterised in that: the connecting rod (1004) quantity is two, and for two connecting rods (1004) in being symmetrically equally spaced, the connecting rod (1004) is L-shaped, described The back side of drive rod (1001) offers and gear (9) compatible tooth socket.
5. a kind of metallic silicon automatic casting production equipment according to claim 1, it is characterised in that: the pedestal (11) Top offer mounting groove, the cleaning rod (13) is made of pitman and cleaning brush, the fixed peace in the outside of the pitman Two cleaning brush are no less than equipped with quantity.
6. a kind of metallic silicon automatic casting production equipment according to claim 1, it is characterised in that: the fixing seat (14) it is in U-shape, the inside of the fixing seat (14) two sidewalls up and down offers and sliding block (15) compatible sliding slot.
CN201910414839.2A 2019-05-17 2019-05-17 A kind of metallic silicon automatic casting production equipment Pending CN110193596A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910414839.2A CN110193596A (en) 2019-05-17 2019-05-17 A kind of metallic silicon automatic casting production equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910414839.2A CN110193596A (en) 2019-05-17 2019-05-17 A kind of metallic silicon automatic casting production equipment

Publications (1)

Publication Number Publication Date
CN110193596A true CN110193596A (en) 2019-09-03

Family

ID=67752838

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910414839.2A Pending CN110193596A (en) 2019-05-17 2019-05-17 A kind of metallic silicon automatic casting production equipment

Country Status (1)

Country Link
CN (1) CN110193596A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111482584A (en) * 2020-06-08 2020-08-04 杭州讹误科技有限公司 Hardware casting machine auxiliary device for avoiding blockage caused by overlong retention time of raw materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111482584A (en) * 2020-06-08 2020-08-04 杭州讹误科技有限公司 Hardware casting machine auxiliary device for avoiding blockage caused by overlong retention time of raw materials

Similar Documents

Publication Publication Date Title
CN207900214U (en) A kind of lost foam casting sandbox bottom sand unloading machine structure
CN111516100B (en) Automatic gypsum scraping device for chalk mold
CN209737935U (en) novel automatic weighing and distributing system
CN110193596A (en) A kind of metallic silicon automatic casting production equipment
CN210160389U (en) Production equipment for automatic casting of metal silicon
CN208220137U (en) A kind of cement mortar for constructional engineering joint filling device
CN213732413U (en) Cement prefabricated part mold convenient to clean
CN202700643U (en) Equipment for eliminating scrap iron from raw material
CN115771190A (en) Automatic change wall body panel pouring system
CN202599134U (en) Device for removing blockings from fire grate strip
CN203579846U (en) Product self-cleaning device of block making machine
CN211070453U (en) Silicon sand edulcoration device for photovoltaic glass production
CN203973738U (en) A kind of domestic ceramics automatic moulding production system
CN112829046A (en) Concrete block forming equipment and concrete block preparation method
CN113666616A (en) Tin ash removing equipment and glass production system
CN209834585U (en) Sintering feed bin sizing cleaning device
CN207170772U (en) A kind of press mould automatic waste discharge device
CN218398716U (en) Rotating disc type feeding device of hydraulic forming machine for wet concrete products
CN210476162U (en) Iron bar rust cleaning device for building decoration
CN217531190U (en) Concrete aerated brick forming device
CN209502960U (en) Aluminum ingot casting production line and its aluminium slag recyclable device
CN114523553B (en) High-efficient compression moulding mechanism of pipelined is handled to fly ash
CN220447889U (en) Construction raw material transfer device is built in room
CN219294270U (en) Concrete prefabricated part mould
CN216912050U (en) Automatic feeding device for aluminum basin die casting machine

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20190903

WD01 Invention patent application deemed withdrawn after publication