CN204470329U - Bundy tube aligning cutting-off device - Google Patents
Bundy tube aligning cutting-off device Download PDFInfo
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- CN204470329U CN204470329U CN201520086618.4U CN201520086618U CN204470329U CN 204470329 U CN204470329 U CN 204470329U CN 201520086618 U CN201520086618 U CN 201520086618U CN 204470329 U CN204470329 U CN 204470329U
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- inroller
- feeding
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- feeding wheels
- straightening
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Abstract
The utility model relates to a kind of Bundy tube aligning cutting-off device, has setting feed mechanism on the table, bar straightening mechanism and shearing device; Described feed mechanism comprises the first feeding wheels and the second feeding wheels; Described bar straightening mechanism comprises horizontal straightening wheel group and vertical straightening wheel group; By feed direction workbench setting gradually the first feeding wheels, horizontal straightening wheel group, vertical straightening wheel group, the second feeding wheels and shearing device; Also be provided with guiding wheels between described second feeding wheels and shearing device, guiding wheels are provided with stroke inductive switch.The utility model energy intelligence carries out cut-out work, enhances productivity.Meanwhile, the utility model has abandoned traditional belt pulley connecting gear, substantially reduces the consume of parts, reduces costs input.
Description
Technical field
The utility model relates to a kind of pipe fitting straightening and abscinding equipment, particularly a kind of Bundy tube aligning cutting-off device.
Background technology
In the production of condenser, the straightening of pipeline and fracture are first step operations.In traditional pipeline aligning cutting-off device, feed mechanism utilizes the belt pulley conveyer be oppositely arranged up and down often, feeding channel is left between upper and lower belt pulley conveyer, the frictional force between pipeline and belt is utilized to realize the transmission of materials in the tube, and bar straightening mechanism is arranged in belt pulley conveyer, the straightening effect of pipeline in process materials in the tube transmitted at belt like this, just can be realized.But traditional belt pulley after some time of use, often find that its wearing and tearing are very serious, replacing and the debugging efforts of belt will be carried out this time.
And in traditional pipeline aligning cutting-off device, adopt conventional chip cutter to carry out cut-out work often.Because condenser pipe often uses Bundy tube, its quality is relatively soft, is easy to the distortion causing incision position in cutting-off process, affects the quality of product.
Summary of the invention
The purpose of this utility model is to provide a kind of Bundy tube aligning cutting-off device effectively can avoided the distortion of pipe fitting cutting portion and reduce feed mechanism wearing and tearing.
The technical scheme realizing the utility model object is: the utility model has setting feed mechanism on the table, bar straightening mechanism and shearing device; It is characterized in that: described feed mechanism comprises the first feeding wheels and the second feeding wheels; Described bar straightening mechanism comprises horizontal straightening wheel group and vertical straightening wheel group; By feed direction workbench setting gradually the first feeding wheels, horizontal straightening wheel group, vertical straightening wheel group, the second feeding wheels and shearing device;
Described horizontal straightening wheel group comprises horizontally disposed installing plate, installing plate is fixed with multiple horizontal direction straightening wheel being staggered front to back arrangement, leaves the aligning passage passed for materials in the tube between horizontal direction straightening wheel; Described vertical straightening wheel group comprises vertically disposed installing plate, installing plate is fixed with multiple upper and lower staggered vertical direction straightening wheel, leaves the aligning passage passed for materials in the tube between vertical direction straightening wheel; Aligning passage between described horizontal direction straightening wheel and the aligning passage between vertical direction straightening wheel are point-blank;
Described first feeding wheels comprise the first driving box, first driving box is vertically provided with drawing-inroller and lower drawing-inroller, upper drawing-inroller and lower drawing-inroller are equipped with annular chute feeder, and the annular chute feeder on the annular chute feeder of upper drawing-inroller and lower drawing-inroller forms feeding channel at the field of conjugate action; Aligning passage on the feeding channel of described first feeding wheels and bar straightening mechanism point-blank; The feed side described first driving box being positioned at the feeding channel of the first feeding wheels is provided with materials in the tube guide pad, and materials in the tube guide pad is provided with the feeding channel charging hole point-blank with the first feeding wheels;
Described second feeding wheels comprise the second driving box, second driving box is vertically provided with drawing-inroller and lower drawing-inroller, upper drawing-inroller and lower drawing-inroller are equipped with annular chute feeder, and the annular chute feeder on the annular chute feeder of upper drawing-inroller and lower drawing-inroller forms feeding channel at the field of conjugate action; Aligning passage on the feeding channel of described second feeding wheels and bar straightening mechanism point-blank;
Guiding wheels are also provided with between described second feeding wheels and shearing device; Described guiding wheels comprise and are vertically set on upper directive wheel on the 3rd driving box and lower directive wheel; Upper directive wheel and lower directive wheel are equipped with annular deflector chute, and the annular deflector chute on the annular deflector chute of upper directive wheel and lower directive wheel forms guide passage at the field of conjugate action; The feeding channel of described guide passage and the second feeding wheels point-blank;
Described guiding wheels are provided with stroke inductive switch, and stroke inductive switch is arranged on the exit side of guide passage.
As optimization, above-mentioned shearing device comprises clamp mould, cutting off tool group and dynamic clamping successively by feed direction;
Described clamp mould comprises clamp die holder, the first clamping and controls the first pneumatic means of the first clamping folding; Described first clamping is fixedly mounted on clamp die holder, and the first pneumatic means is fixedly mounted on clamp die holder;
Described dynamic clamping comprises the dynamic clamping seat of dynamic clamping seat, the second clamping and control and slidably reciprocates along feed direction and control the second pneumatic means of the second clamping folding; Described dynamic clamping seat is slidably installed on the table, and the second clamping is fixedly mounted on dynamic clamping seat, and the second pneumatic means is fixedly mounted on dynamic clamping seat;
Described first clamping and the second clamping are equipped with the gripping channel passed through for materials in the tube, and the feeding channel of gripping channel and the second feeding wheels on the same line;
Described cutting off tool group comprises four-wheel drive case, connects rotating disk, the toolbox of drive motors; Described four-wheel drive case is provided with rotating disk, the center of rotating disk be provided with one with gripping channel feed orifice point-blank, be relatively provided with two chutes in the both sides of feed orifice, each chute be equipped with a toolbox; Described toolbox comprises connecting rod and cutter, and one end of connecting rod is fixedly connected with cutter, and the other end of connecting rod stretches in four-wheel drive case through chute and is connected at the drive unit of chute movement with driving it.
As optimization, the above-mentioned work top that shearing device is set is fixed with slide bar, one end of slide bar is fixedly connected with the clamp die holder of clamp mould, and the other end of slide bar is fixed with limited block, and the dynamic clamping seat of dynamic clamping to be slidably arranged on slide bar and between limited block and cutting off tool group.
As optimization, the cutter on above-mentioned toolbox is disc, and its outer circumferential edge is cutting edge.
As optimization, above-mentioned driving box is provided with guide pad towards the side of clamp mould, and described guide pad is provided with and gripping channel material guide hole point-blank.
The utility model has positive effect: the feed mechanism in (1) the utility model does not adopt traditional pulley drive, avoids the wearing and tearing of belt pulley and the replacing of later stage belt; (2) bar straightening mechanism of the present utility model adopts horizontal direction straightening wheel and vertical direction straightening wheel, and this kind of design better can carry out straightening to materials in the tube; (3) cut-out mode of the present utility model is the cut channel first cutting out certain depth in materials in the tube, and the relative sliding of recycling clamp mould and dynamic clamping breaks materials in the tube, the problem that this kind of cut-out mode can well avoid materials in the tube incision to be out of shape.
Accompanying drawing explanation
In order to make content of the present utility model more easily be clearly understood, below according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail, wherein
Fig. 1 is perspective view of the present utility model;
Fig. 2 is the structural representation of shearing device of the present utility model;
Fig. 3 is the structural representation of the rotating disk of shearing device in the utility model.
Fig. 4 is the front view of cutting off tool group in the utility model.
Detailed description of the invention
See Fig. 1 to Fig. 4, the utility model has the feed mechanism 2 be arranged on workbench 1, bar straightening mechanism 3 and shearing device 4; Described feed mechanism 2 comprises the first feeding wheels 21 and the second feeding wheels 22; Described bar straightening mechanism 3 comprises horizontal straightening wheel group 31 and vertical straightening wheel group 32; By feed direction workbench 1 setting gradually the first feeding wheels 21, horizontal straightening wheel group 31, vertical straightening wheel group 32, second feeding wheels 22 and shearing device 4;
Described horizontal straightening wheel group 31 comprises horizontally disposed installing plate 31-1, installing plate 31-1 is fixed with multiple horizontal direction straightening wheel 31-2 being staggered front to back arrangement, leaves the aligning passage passed for materials in the tube between horizontal direction straightening wheel 31-2; Described vertical straightening wheel group 32 comprises vertically disposed installing plate 32-1, installing plate 32-1 is fixed with multiple upper and lower staggered vertical direction straightening wheel 32-2, leaves the aligning passage passed for materials in the tube between vertical direction straightening wheel 32-2; Aligning passage between described horizontal direction straightening wheel 31-2 and the aligning passage between vertical direction straightening wheel 32-2 are point-blank;
Described first feeding wheels 21 comprise the first driving box 21-1, first driving box is vertically provided with drawing-inroller 21-2 and lower drawing-inroller 21-3, upper drawing-inroller 21-2 and lower drawing-inroller 21-3 is equipped with annular chute feeder, and the annular chute feeder on the annular chute feeder of upper drawing-inroller 21-2 and lower drawing-inroller 21-3 forms feeding channel at the field of conjugate action; Aligning passage on the feeding channel of described first feeding wheels 21 and bar straightening mechanism 3 point-blank; The feed side described first driving box 21-1 being positioned at the feeding channel of the first feeding wheels 21 is provided with materials in the tube guide pad 21-4, and materials in the tube guide pad 21-4 is provided with the feeding channel charging hole point-blank with the first feeding wheels 21;
Described second feeding wheels 22 comprise the second driving box 22-1, second driving box 22-1 is vertically provided with drawing-inroller 22-2 and lower drawing-inroller 22-3, upper drawing-inroller 22-2 and lower drawing-inroller 22-3 is equipped with annular chute feeder, and the annular chute feeder on the annular chute feeder of upper drawing-inroller 22-2 and lower drawing-inroller 22-3 forms feeding channel at the field of conjugate action; Aligning passage on the feeding channel of described second feeding wheels 22 and bar straightening mechanism 3 point-blank;
The wheels 5 that lead also are provided with between described second feeding wheels 22 and shearing device 4; Described guiding wheels 5 comprise and are vertically set on upper directive wheel 52 on the 3rd driving box 51 and lower directive wheel 53; Upper directive wheel 52 and lower directive wheel 53 are equipped with annular deflector chute, and the annular deflector chute on the annular deflector chute of upper directive wheel 52 and lower directive wheel 53 forms guide passage at the field of conjugate action; The feeding channel of described guide passage and the second feeding wheels 22 point-blank;
Described guiding wheels 5 are provided with stroke inductive switch 6, and stroke inductive switch 6 is arranged on the exit side of guide passage.
Described shearing device 4 comprises clamp mould 41, cutting off tool group 42 and dynamic clamping 43 successively by feed direction;
Described clamp mould 41 comprises clamp die holder 41-1, the first clamping 41-2 and controls the first pneumatic means 41-3 of the first clamping 41-2 folding; Described first clamping 41-2 is fixedly mounted on clamp die holder 41-1, and the first pneumatic means 41-3 is fixedly mounted on clamp die holder 41-1;
Described dynamic clamping 43 comprises dynamic clamping seat 43-1, the second clamping 43-2 and the dynamic clamping seat 43-1 of control slidably reciprocates along feed direction and controls the second pneumatic means 43-3 of the second clamping 43-2 folding; Described second clamping 43-2 is fixedly mounted on dynamic clamping seat 43-1, and the second pneumatic means 43-3 is fixedly mounted on dynamic clamping seat 43-1;
Described first clamping 41-2 and the second clamping 43-2 is equipped with the gripping channel passed through for materials in the tube, the feeding channel of gripping channel and the second feeding wheels 22 on the same line;
Described cutting off tool group 42 comprises four-wheel drive case 42-1, connects rotating disk 42-2, the toolbox 42-3 of drive motors; Described four-wheel drive case 42-1 is provided with rotating disk 42-2, the center of rotating disk 42-2 be provided with one with gripping channel feed orifice 42-4 point-blank, relatively be provided with two chute 42-5 in the both sides of feed orifice 42-4, each chute 42-5 be equipped with a toolbox 42-3; Described toolbox 42-3 comprises connecting rod 42-6 and cutter 42-7, one end of connecting rod 42-6 is fixedly connected with cutter 42-7, and the other end of connecting rod 42-6 stretches in four-wheel drive case 42-1 through chute 42-5 and is connected at the drive unit of chute 42-5 movement with driving it.
The described workbench 1 that shearing device 4 is set is fixed with slide bar 44, one end of slide bar 44 is fixedly connected with the clamp die holder 41-1 of clamp mould 41, the other end of slide bar 44 is fixed with limited block 45, and the dynamic clamping seat 43-1 of dynamic clamping 43 to be slidably arranged on slide bar 44 and between limited block 45 and cutting off tool group 42.
Cutter 42-7 on described toolbox 42-3 is disc, and its outer circumferential edge is cutting edge.
Described four-wheel drive case 42-1 is provided with guide pad 46 towards the side of clamp mould 41, and described guide pad 46 is provided with and gripping channel material guide hole point-blank.
In feeding process, Bundy tube is advanced to shearing device 4 direction under the effect of feed mechanism 2, and Bundy tube carries out straightening under the effect of bar straightening mechanism 3.After the length of setting of advancing, under the induction of stroke inductive switch 6, feed mechanism 2 stops feeding, clamp mould 41 and the dynamic clamping 43 of shearing device clamp materials in the tube, while rotating disk 42-2 rotates, toolbox 42-3 advances to feed orifice 42-4, cutter 42-7 cuts out the cut channel of certain depth in materials in the tube, and now dynamic clamping 43 is slided and materials in the tube to be broken.Because materials in the tube are finally broken, its port can not deform.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. a Bundy tube aligning cutting-off device, has the feed mechanism (2) be arranged on workbench (1), bar straightening mechanism (3) and shearing device (4); It is characterized in that: described feed mechanism (2) comprises the first feeding wheels (21) and the second feeding wheels (22); Described bar straightening mechanism (3) comprises horizontal straightening wheel group (31) and vertical straightening wheel group (32); By feed direction workbench (1) setting gradually the first feeding wheels (21), horizontal straightening wheel group (31), vertical straightening wheel group (32), the second feeding wheels (22) and shearing device (4);
Described horizontal straightening wheel group (31) comprises horizontally disposed installing plate (31-1), installing plate (31-1) is fixed with multiple horizontal direction straightening wheel (31-2) being staggered front to back arrangement, between horizontal direction straightening wheel (31-2), leaves the aligning passage passed for materials in the tube; Described vertical straightening wheel group (32) comprises vertically disposed installing plate (32-1), installing plate (32-1) is fixed with multiple upper and lower staggered vertical direction straightening wheel (32-2), between vertical direction straightening wheel (32-2), leaves the aligning passage passed for materials in the tube; Aligning passage between described horizontal direction straightening wheel (31-2) and the aligning passage between vertical direction straightening wheel (32-2) are point-blank;
Described first feeding wheels (21) comprise the first driving box (21-1), first driving box is vertically provided with drawing-inroller (21-2) and lower drawing-inroller (21-3), upper drawing-inroller (21-2) and lower drawing-inroller (21-3) are equipped with annular chute feeder, and the annular chute feeder on the annular chute feeder of upper drawing-inroller (21-2) and lower drawing-inroller (21-3) forms feeding channel at the field of conjugate action; Aligning passage on the feeding channel of described first feeding wheels (21) and bar straightening mechanism (3) point-blank; The feed side described first driving box (21-1) being positioned at the feeding channel of the first feeding wheels (21) is provided with materials in the tube guide pad (21-4), and materials in the tube guide pad (21-4) is provided with the feeding channel charging hole point-blank with the first feeding wheels (21);
Described second feeding wheels (22) comprise the second driving box (22-1), second driving box (22-1) is vertically provided with drawing-inroller (22-2) and lower drawing-inroller (22-3), upper drawing-inroller (22-2) and lower drawing-inroller (22-3) are equipped with annular chute feeder, and the annular chute feeder on the annular chute feeder of upper drawing-inroller (22-2) and lower drawing-inroller (22-3) forms feeding channel at the field of conjugate action; Aligning passage on the feeding channel of described second feeding wheels (22) and bar straightening mechanism (3) point-blank;
The wheels (5) that lead also are provided with between described second feeding wheels (22) and shearing device (4); Described guiding wheels (5) comprise and are vertically set on upper directive wheel (52) on the 3rd driving box (51) and lower directive wheel (53); Upper directive wheel (52) and lower directive wheel (53) are equipped with annular deflector chute, and the annular deflector chute on the annular deflector chute of upper directive wheel (52) and lower directive wheel (53) forms guide passage at the field of conjugate action; The feeding channel of described guide passage and the second feeding wheels (22) point-blank;
Described guiding wheels (5) are provided with stroke inductive switch (6), and stroke inductive switch (6) is arranged on the exit side of guide passage.
2. Bundy tube aligning cutting-off device according to claim 1, is characterized in that: described shearing device (4) comprises clamp mould (41), cutting off tool group (42) and dynamic clamping (43) successively by feed direction;
Described clamp mould (41) comprises clamp die holder (41-1), the first clamping (41-2) and controls first pneumatic means (41-3) of the first clamping (41-2) folding; Described first clamping (41-2) is fixedly mounted on clamp die holder (41-1), and the first pneumatic means (41-3) is fixedly mounted on clamp die holder (41-1);
Described dynamic clamping (43) comprises the dynamic clamping seat (43-1) of dynamic clamping seat (43-1), the second clamping (43-2) and control and slidably reciprocates along feed direction and control second pneumatic means (43-3) of the second clamping (43-2) folding; Described dynamic clamping seat (43-1) is slidably mounted on workbench (1), second clamping (43-2) is fixedly mounted on dynamic clamping seat (43-1), and the second pneumatic means (43-3) is fixedly mounted on dynamic clamping seat (43-1);
Described first clamping (41-2) and the second clamping (43-2) are equipped with the gripping channel passed through for materials in the tube, and the feeding channel of gripping channel and the second feeding wheels (22) on the same line;
Described cutting off tool group (42) comprises four-wheel drive case (42-1), connects rotating disk (42-2), the toolbox (42-3) of drive motors; Described four-wheel drive case (42-1) is provided with rotating disk (42-2), the center of rotating disk (42-2) be provided with one with gripping channel feed orifice point-blank (42-4), relatively be provided with two chutes (42-5) in the both sides of feed orifice (42-4), each chute (42-5) be equipped with a toolbox (42-3); Described toolbox (42-3) comprises connecting rod (42-6) and cutter (42-7), one end of connecting rod (42-6) is fixedly connected with cutter (42-7), and the other end of connecting rod (42-6) stretches in four-wheel drive case (42-1) through chute (42-5) and is connected at the drive unit of chute (42-5) movement with driving it.
3. Bundy tube aligning cutting-off device according to claim 2, it is characterized in that: the described workbench (1) that shearing device (4) are set is fixed with slide bar (44), one end of slide bar (44) is fixedly connected with the clamp die holder (41-1) of clamp mould (41), the other end of slide bar (44) is fixed with limited block (45), and the dynamic clamping seat (43-1) of dynamic clamping (43) is slidably arranged in slide bar (44) and goes up and be positioned between limited block (45) and cutting off tool group (42).
4. Bundy tube aligning cutting-off device according to claim 3, is characterized in that: the cutter (42-7) on described toolbox (42-3) is in disc, and its outer circumferential edge is cutting edge.
5. Bundy tube aligning cutting-off device according to claim 4, it is characterized in that: described four-wheel drive case (42-1) is provided with guide pad (46) towards the side of clamp mould (41), described guide pad (46) is provided with and gripping channel material guide hole point-blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520086618.4U CN204470329U (en) | 2015-02-06 | 2015-02-06 | Bundy tube aligning cutting-off device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520086618.4U CN204470329U (en) | 2015-02-06 | 2015-02-06 | Bundy tube aligning cutting-off device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204470329U true CN204470329U (en) | 2015-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520086618.4U Expired - Fee Related CN204470329U (en) | 2015-02-06 | 2015-02-06 | Bundy tube aligning cutting-off device |
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| CN (1) | CN204470329U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105312443A (en) * | 2015-11-13 | 2016-02-10 | 衢州学院 | Self-correcting pipe feeding unit and self-correcting pipe feeding mechanism of automatic pipe coiler |
| CN105728505A (en) * | 2016-03-01 | 2016-07-06 | 青岛汉缆迪玛尔海洋装备制造有限公司 | Roller type straightener for steel pipe |
| CN106513538A (en) * | 2016-10-08 | 2017-03-22 | 云南灵瑞农业科技有限公司 | Automatic non-scratch steel wire straightening cutting-off machine |
| CN106903364A (en) * | 2017-04-17 | 2017-06-30 | 江苏海森电气科技有限公司 | High-quality Bundy tube Cutting process |
| CN107972103A (en) * | 2017-11-23 | 2018-05-01 | 中山市科力高自动化设备有限公司 | A kind of tubular workpiece sawing sheet device |
| CN108296306A (en) * | 2017-01-13 | 2018-07-20 | 国联机械实业股份有限公司 | Machine in metal wire rod production method and its equipment and its equipment |
| CN108906883A (en) * | 2018-08-27 | 2018-11-30 | 快克智能装备股份有限公司 | A kind of tin silk flattening mechanism and the flattening cutting machine with the mechanism |
-
2015
- 2015-02-06 CN CN201520086618.4U patent/CN204470329U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105312443A (en) * | 2015-11-13 | 2016-02-10 | 衢州学院 | Self-correcting pipe feeding unit and self-correcting pipe feeding mechanism of automatic pipe coiler |
| CN105312443B (en) * | 2015-11-13 | 2017-06-27 | 衢州学院 | Pipe unit and self-correcting tube feeding mechanism are sent in a kind of self-correcting of automatic pipe winding machine |
| CN105728505A (en) * | 2016-03-01 | 2016-07-06 | 青岛汉缆迪玛尔海洋装备制造有限公司 | Roller type straightener for steel pipe |
| CN106513538A (en) * | 2016-10-08 | 2017-03-22 | 云南灵瑞农业科技有限公司 | Automatic non-scratch steel wire straightening cutting-off machine |
| CN108296306A (en) * | 2017-01-13 | 2018-07-20 | 国联机械实业股份有限公司 | Machine in metal wire rod production method and its equipment and its equipment |
| CN106903364A (en) * | 2017-04-17 | 2017-06-30 | 江苏海森电气科技有限公司 | High-quality Bundy tube Cutting process |
| CN107972103A (en) * | 2017-11-23 | 2018-05-01 | 中山市科力高自动化设备有限公司 | A kind of tubular workpiece sawing sheet device |
| CN108906883A (en) * | 2018-08-27 | 2018-11-30 | 快克智能装备股份有限公司 | A kind of tin silk flattening mechanism and the flattening cutting machine with the mechanism |
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Effective date of registration: 20160923 Address after: 225500 Zhenlong Creek Industrial Zone, Jiangyan District, Taizhou, Jiangsu Patentee after: Jiangsu Haisan Electric Technology Co Ltd Address before: 225500 Zhenlong Creek Industrial Zone, Jiangyan District, Taizhou, Jiangsu Patentee before: Anji, Taizhou Electronics Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20180206 |
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| CF01 | Termination of patent right due to non-payment of annual fee |