CN107839199A - A kind of concave-convex mold plastic uptake stamping machine and its Sheet Metal Forming Technology - Google Patents

A kind of concave-convex mold plastic uptake stamping machine and its Sheet Metal Forming Technology Download PDF

Info

Publication number
CN107839199A
CN107839199A CN201711208878.4A CN201711208878A CN107839199A CN 107839199 A CN107839199 A CN 107839199A CN 201711208878 A CN201711208878 A CN 201711208878A CN 107839199 A CN107839199 A CN 107839199A
Authority
CN
China
Prior art keywords
sheet material
rotating shaft
decompressor
frame
elevating mechanism
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201711208878.4A
Other languages
Chinese (zh)
Other versions
CN107839199B (en
Inventor
黎德智
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.)
Anhui Yibao Precision Blister Co ltd
Original Assignee
Vertical Rich Mechanical Science And Technology Ltd Of Zhongshan City's Letter
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 Vertical Rich Mechanical Science And Technology Ltd Of Zhongshan City's Letter filed Critical Vertical Rich Mechanical Science And Technology Ltd Of Zhongshan City's Letter
Priority to CN201711208878.4A priority Critical patent/CN107839199B/en
Publication of CN107839199A publication Critical patent/CN107839199A/en
Application granted granted Critical
Publication of CN107839199B publication Critical patent/CN107839199B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10Forming by pressure difference, e.g. vacuum
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/18Thermoforming apparatus
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26Component parts, details or accessories; Auxiliary operations
    • B29C51/261Handling means, e.g. transfer means, feeding means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26Component parts, details or accessories; Auxiliary operations
    • B29C51/30Moulds
    • B29C51/34Moulds for undercut articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26Component parts, details or accessories; Auxiliary operations
    • B29C51/30Moulds
    • B29C51/34Moulds for undercut articles
    • B29C51/343Moulds for undercut articles having recessed undersurfaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26Component parts, details or accessories; Auxiliary operations
    • B29C51/30Moulds
    • B29C51/36Moulds specially adapted for vacuum forming, Manufacture thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

The invention discloses concave-convex mold plastic uptake stamping machine, including:Frame;Decompressor, in frame, for completing the punching press to sheet material;Feeding rack, for being sent into sheet material toward decompressor;Elevating mechanism, for driving the sheet material passed through to decompressor to move up and down.A kind of Sheet Metal Forming Technology using concavo-convex die press, comprise the following steps:When finished product is recessed on sheet material, sheet material enters decompressor by feeding rack and carries out punching press, and elevating mechanism does not work;When finished product is convex on sheet material, sheet material enters decompressor by feeding rack, and then sheet material is raised to by elevating mechanism work is bonded with the mould of top, and decompressor carries out punching press, and then elevating mechanism moves down, and feeding rack carries out feeding sheets.It can be realized using the present invention of said structure on a machine and punching press is carried out to convex or recessed finished product, the configuration of a stamping machine can be saved compared with the prior art, reduce production cost.

Description

A kind of concave-convex mold plastic uptake stamping machine and its Sheet Metal Forming Technology
Technical field
The present invention relates to a kind of stamping technology field, more particularly to a kind of concave-convex mold plastic uptake stamping machine and its presser Skill.
Background technology
In plastic uptake technical field, it is often necessary to use stamping machine and stamp out finished product from sheet material, finished product may on sheet material Convex or recessed, a stamping machine can only carry out punching press to convex or recessed finished product in existing stamping machine, it is impossible at the same it is right Convex or recessed finished product carries out punching press, so user is frequently necessary to configure two stamping machines to tackle different finished products, Resource distribution is unreasonable, and increases the acquisition cost of user, therefore, the present invention is supplied to one kind can be simultaneously suitable for convex Or recessed finished product carries out the concave-convex mold plastic uptake stamping machine and its Sheet Metal Forming Technology of punching press.
The content of the invention
In order to solve the above problems, present invention offer is a kind of can be applied to convex or recessed finished product progress punching press simultaneously Concave-convex mold plastic uptake stamping machine and its Sheet Metal Forming Technology.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of concave-convex mold plastic uptake stamping machine, including:
Frame;
Decompressor, in frame, for completing the punching press to sheet material;
Feeding rack, for being sent into sheet material toward decompressor;
Elevating mechanism, for driving the sheet material passed through to decompressor to move up and down.
Described feeding rack one end is articulated in frame, and elevating mechanism acts on the other end of feeding rack.
The elevating mechanism includes connecting rod and the lifter plate being liftably installed in frame, connecting rod one end and lifting Plate is pivotally connected, and the other end is pivotally connected with feeding rack.
Present invention additionally comprises splicing frame, described splicing frame one end is pivotally connected with frame, and the other end can be swung.
Present invention additionally comprises the first traction wheel of mutual cooperation and the second traction wheel, the first traction wheel and the second traction wheel are all It is installed in rotation in frame, the diameter of the first traction wheel is more than the diameter of the second traction wheel.
First traction wheel and the second traction wheel are separately mounted in first rotating shaft and the second rotating shaft, are set in the frame The first auxiliary rotating shaft and the second auxiliary rotating shaft are equipped with, the first auxiliary rotating shaft can be fixed with first rotating shaft or the second rotating shaft by axle sleeve Connection, the second auxiliary rotating shaft can be fixedly connected with first rotating shaft or the second rotating shaft by axle sleeve.
The first rotating shaft, the second rotating shaft, the first auxiliary rotating shaft and the second auxiliary rotating shaft are all arranged on a lifting platform.
A kind of Sheet Metal Forming Technology using concavo-convex die press, comprise the following steps:
When finished product is recessed on sheet material, sheet material enters decompressor by feeding rack and carries out punching press, and elevating mechanism does not work;
When finished product is convex on sheet material, sheet material enters decompressor by feeding rack, and then elevating mechanism works sheet material lifting To being bonded with the mould of top, decompressor carries out punching press, and then elevating mechanism moves down, and feeding rack carries out feeding sheets.
The beneficial effects of the invention are as follows:Using the present invention of said structure in the convex finished product of punching press, pass through elevating mechanism Sheet material is bonded with the mould above it, carries out punching press, in the recessed finished product of punching press, elevating mechanism does not work;So can be Realized on one machine and punching press is carried out to convex or recessed finished product, matching somebody with somebody for stamping machine can be saved compared with the prior art Put, reduce production cost.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples:
Fig. 1 is the schematic diagram one when the present invention is in low level to convex finished product progress punching press elevating mechanism;
Fig. 2 is the schematic diagram one when the present invention is in high-order to convex finished product progress punching press elevating mechanism;
Fig. 3 is the schematic diagram two when the present invention is in low level to convex finished product progress punching press elevating mechanism;
Fig. 4 is the schematic diagram two when the present invention is in high-order to convex finished product progress punching press elevating mechanism;
Fig. 5 is the schematic diagram when present invention carries out punching press to recessed finished product.
Embodiment
1~Fig. 5 of reference picture, the present invention are a kind of concave-convex mold plastic uptake stamping machines, including:
Frame 1;
Decompressor 2, in frame 1, for completing the punching press to sheet material 3, decompressor 2 includes cavity plate 4 and punch-pin 5, cavity plate 4 is fixed in frame 1, and punch-pin 5 is slidably mounted in frame 1;
Feeding rack 6, for being sent into sheet material 3 toward decompressor 2;
Elevating mechanism, for driving the sheet material 3 passed through to decompressor 2 to move up and down.Using the present invention of said structure In the convex finished product 18 of punching press, sheet material 3 is bonded with the cavity plate 4 above it by elevating mechanism so that finished product enters cavity plate 4 It is interior, punching press is carried out, in the recessed finished product 19 of punching press, sheet material 3 is directly bonded with cavity plate 4, and decompressor 2 can directly work, therefore And now elevating mechanism does not work;It can so be realized on a machine and punching press is carried out to convex or recessed finished product, relatively Prior art can save the configuration of a stamping machine, reduce production cost.
As illustrated, described one end of feeding rack 6 is articulated in frame 1, elevating mechanism acts on the other end of feeding rack 6; Drive feeding rack 6 to rotate by elevating mechanism to realize the end lifting of feeding rack 6 close to decompressor 2, and then realize and drive It is dynamic to pass through to the lifting of sheet material 3 of decompressor 2 so that the sheet material 3 with convex finished product is bonded with cavity plate 4, facilitates decompressor 2 Punching press;Wherein, the elevating mechanism includes connecting rod 7 and the lifter plate 8 being liftably installed in frame 1, the one end of connecting rod 7 It is pivotally connected with lifter plate 8, the other end is pivotally connected with feeding rack 6, and lifter plate 8 can pass through cylinder driving or motor lead screw etc..
As illustrated, present invention additionally comprises splicing frame 9, described one end of splicing frame 9 is pivotally connected with frame 1, and the other end can be carried out Swing, the action of splicing frame 9 follows feeding rack 6, sheet material 3 is accepted to follow.
As illustrated, present invention additionally comprises the first traction wheel 10 of mutual cooperation and the second traction wheel 11, the first traction wheel 10 and second traction wheel 11 be all installed in rotation in frame 1, the diameter of the first traction wheel 10 is more than the second traction wheel 11 Diameter.Sheet material 3 is between the first traction wheel 10 and the second traction wheel 11 by being drawn to the sheet material 3 with convex finished product When the first traction wheel 10 up, to avoid the first rotating shaft 12 of the first traction wheel 10 and finished product from interfering;To with recessed finished product Sheet material 3 first traction wheel 10 is in lower section when being drawn, to avoid the second rotating shaft 13 of the second traction wheel 11 from interfering with finished product; It is, it is necessary to first exchange the installation site of the second traction wheel of machine 11 of the first traction wheel 10 when the 3 type difference of sheet material of punching press for this This provides the following structure for being easy to fast exchange;The traction wheel 11 of first traction wheel 10 and second is separately mounted to first rotating shaft 12 and second in rotating shaft 13, and the first auxiliary rotating shaft 14 and the second auxiliary rotating shaft 15, the first auxiliary rotating shaft are provided with the frame 1 14 can be fixedly connected with the rotating shaft 13 of first rotating shaft 12 or second by axle sleeve 16, second auxiliary rotating shaft 15 can with first rotating shaft 12 or Second rotating shaft 13 is fixedly connected by axle sleeve 16, axle sleeve 16 and first rotating shaft 12, the rotating shaft 14 of the second rotating shaft 13, first auxiliary, the It is bolted between two auxiliary rotating shafts 15, so realizes and quickly disconnect.
As shown in the figure;The first rotating shaft 12, the second rotating shaft 13, first auxiliary rotating shaft 14 and second aid in rotating shaft 15 all to pacify On a lifting platform 17, the other end and the lifting platform 17 of splicing frame 9 are pivotally connected, and lifting platform 17 follows feeding rack 6 and splicing frame 9 Action so that the second traction wheel of machine 11 of the first traction wheel 10 whole can be drawn to sheet material 3.
A kind of Sheet Metal Forming Technology using concavo-convex die press, comprise the following steps:
When finished product is recessed on sheet material 3, sheet material 3 carries out punching press by feeding rack 6 into decompressor 2, and elevating mechanism does not work;
When finished product is convex on sheet material 3, sheet material 3 enters decompressor 2 by feeding rack 6, and then elevating mechanism works sheet material 3 It is raised to and is bonded with the mould of top, decompressor 2 carries out punching press, and then elevating mechanism moves down, and feeding rack 6 carries out feeding sheets 3。
Using said structure the present invention in the convex finished product of punching press, by elevating mechanism by sheet material 3 and its above mould Tool fitting, carries out punching press, in the recessed finished product of punching press, elevating mechanism does not work;It can so be realized on a machine to upper Convex or recessed finished product carries out punching press, can save the configuration of a stamping machine compared with the prior art, reduces production cost.
Above-described embodiment is the preferred scheme of the present invention, and the present invention can also have other embodiments.The technology of this area Personnel can also make equivalent variations or replacement on the premise of without prejudice to spirit of the invention, and these equivalent modifications or replacement are wrapped It is contained in the scope set by the application claim.

Claims (8)

  1. A kind of 1. concave-convex mold plastic uptake stamping machine, it is characterised in that including:
    Frame;
    Decompressor, in frame, for completing the punching press to sheet material;
    Feeding rack, for being sent into sheet material toward decompressor;
    Elevating mechanism, for driving the sheet material passed through to decompressor to move up and down.
  2. 2. a kind of concave-convex mold plastic uptake stamping machine as claimed in claim 1, it is characterised in that described feeding rack one end is articulated in machine On frame, elevating mechanism acts on the other end of feeding rack.
  3. 3. a kind of concave-convex mold plastic uptake stamping machine as claimed in claim 2, it is characterised in that the elevating mechanism includes connecting rod The lifter plate being liftably installed in frame, connecting rod one end are pivotally connected with lifter plate, and the other end is pivotally connected with feeding rack.
  4. 4. a kind of concave-convex mold plastic uptake stamping machine as claimed in claim 1, it is characterised in that it also includes splicing frame, the splicing Frame one end is pivotally connected with frame, and the other end can be swung.
  5. 5. a kind of concave-convex mold plastic uptake stamping machine as claimed in claim 1, it is characterised in that it also includes first to cooperate Traction wheel and the second traction wheel, the first traction wheel and the second traction wheel are all installed in rotation in frame, the first traction wheel Diameter is more than the diameter of the second traction wheel.
  6. 6. a kind of concave-convex mold plastic uptake stamping machine as claimed in claim 5, it is characterised in that first traction wheel and second lead Running wheel is separately mounted in first rotating shaft and the second rotating shaft, and the first auxiliary rotating shaft is provided with the frame and the second auxiliary turns Axle, the first auxiliary rotating shaft can be fixedly connected with first rotating shaft or the second rotating shaft by axle sleeve, and the second auxiliary rotating shaft can be with first turn Axle or the second rotating shaft are fixedly connected by axle sleeve.
  7. A kind of 7. concave-convex mold plastic uptake stamping machine as claimed in claim 6, it is characterised in that the first rotating shaft, the second rotating shaft, First auxiliary rotating shaft and the second auxiliary rotating shaft are all arranged on a lifting platform.
  8. 8. a kind of Sheet Metal Forming Technology using concavo-convex die press as claimed in claim 1, it is characterised in that comprise the following steps:
    When finished product is recessed on sheet material, sheet material enters decompressor by feeding rack and carries out punching press, and elevating mechanism does not work;
    When finished product is convex on sheet material, sheet material enters decompressor by feeding rack, then elevating mechanism work by sheet material be raised to The mould fitting of top, decompressor carry out punching press.
CN201711208878.4A 2017-11-27 2017-11-27 Concave-convex mold plastic suction punching machine and punching process thereof Expired - Fee Related CN107839199B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711208878.4A CN107839199B (en) 2017-11-27 2017-11-27 Concave-convex mold plastic suction punching machine and punching process thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711208878.4A CN107839199B (en) 2017-11-27 2017-11-27 Concave-convex mold plastic suction punching machine and punching process thereof

Publications (2)

Publication Number Publication Date
CN107839199A true CN107839199A (en) 2018-03-27
CN107839199B CN107839199B (en) 2020-12-01

Family

ID=61680441

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711208878.4A Expired - Fee Related CN107839199B (en) 2017-11-27 2017-11-27 Concave-convex mold plastic suction punching machine and punching process thereof

Country Status (1)

Country Link
CN (1) CN107839199B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111409252A (en) * 2020-04-08 2020-07-14 上海腾曼包装印刷有限公司 PE wrapping bag individual layer abnormal shape tears drawing press device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202725733U (en) * 2012-05-30 2013-02-13 东莞市拓诚实业有限公司 Automatic continuous punching machine
CN103342243A (en) * 2013-05-29 2013-10-09 广东一鼎科技有限公司 Panel conveying device achieving multi-station synchronous and intermittent advancing
CN106238605A (en) * 2016-08-29 2016-12-21 昆山昱耀电子有限公司 A kind of stamped from sheetstock device
CN206154740U (en) * 2016-09-29 2017-05-10 黄民清 Carrier band plastic uptake all -in -one

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202725733U (en) * 2012-05-30 2013-02-13 东莞市拓诚实业有限公司 Automatic continuous punching machine
CN103342243A (en) * 2013-05-29 2013-10-09 广东一鼎科技有限公司 Panel conveying device achieving multi-station synchronous and intermittent advancing
CN106238605A (en) * 2016-08-29 2016-12-21 昆山昱耀电子有限公司 A kind of stamped from sheetstock device
CN206154740U (en) * 2016-09-29 2017-05-10 黄民清 Carrier band plastic uptake all -in -one

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111409252A (en) * 2020-04-08 2020-07-14 上海腾曼包装印刷有限公司 PE wrapping bag individual layer abnormal shape tears drawing press device

Also Published As

Publication number Publication date
CN107839199B (en) 2020-12-01

Similar Documents

Publication Publication Date Title
CN107839199A (en) A kind of concave-convex mold plastic uptake stamping machine and its Sheet Metal Forming Technology
CN201201023Y (en) Machine for rolling and forming surface of revolution
CN103639309B (en) Necking machine for inner cylinder of washing machine
CN207205264U (en) A kind of Intelligent mobile feed device
CN104874673B (en) Full-automatic numerical control double edge steel structure forming machine
CN105904001B (en) A kind of shape extrusion perforating mechanism
CN213254607U (en) Cylinder pressing device for pharmaceutical machinery
CN104874674B (en) Full-automatic numerical control list bound edge steel structure forming machine
CN209520263U (en) It is a kind of to rotate the mold for laminating iron core
CN202316697U (en) Quick adjusting device for upper roller of three-roller plate roll
CN202242719U (en) Edge knurling machine
CN2614812Y (en) Automatic spinning stretcher
CN206520145U (en) A kind of device for rolling and molding
CN205801680U (en) Drawing and forming device for thermoforming vacuum packaging machine
CN104842585B (en) A kind of powder product product trimmer cam ejecting mechanism
CN101791867A (en) Pressing mechanism for forming machine
CN204689200U (en) A kind of aluminium flake Waste recovering machine
CN211768486U (en) One-to-two full-automatic plane external ear type mask manufacturing machine
CN208214133U (en) A kind of automatic discharge apparatus waving punching machine
CN202738719U (en) Tea shaping machine
CN202344829U (en) Lifting forming device of food packing tool
CN201633216U (en) Compaction mechanism of forming machine
CN107900926A (en) Abrasive wheel forming tablet press machine
CN202016221U (en) Lining plate lifting device for creasing and cutting machine
CN211218220U (en) Portable punching machine

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20201111

Address after: Room 0, No.2 production testing center, No.399, Fuyang Industrial Park, Fuyang Industrial Park, Yingquan District, Fuyang City, Anhui Province

Applicant after: Anhui Yibao precision blister Co.,Ltd.

Address before: 528400 Guangdong Province, Zhongshan City Xiaolan Town, North Green Yun Lu No. 2 B district two

Applicant before: ZHONGSHAN XINLIFU MACHINERY TECHNOLOGY Co.,Ltd.

GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20201201

Termination date: 20211127