CN109647572B - Waste electrical apparatus shell separation recovery unit - Google Patents
Waste electrical apparatus shell separation recovery unit Download PDFInfo
- Publication number
- CN109647572B CN109647572B CN201811564744.0A CN201811564744A CN109647572B CN 109647572 B CN109647572 B CN 109647572B CN 201811564744 A CN201811564744 A CN 201811564744A CN 109647572 B CN109647572 B CN 109647572B
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- Prior art keywords
- crushing
- collecting
- crushing roller
- collecting plate
- frame
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- 239000002699 waste material Substances 0.000 title claims abstract description 33
- 238000000926 separation method Methods 0.000 title claims abstract description 9
- 238000011084 recovery Methods 0.000 title claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 60
- 229910052751 metal Inorganic materials 0.000 claims abstract description 60
- 239000007769 metal material Substances 0.000 claims abstract description 14
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 9
- 238000004064 recycling Methods 0.000 claims abstract description 8
- 238000005192 partition Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract description 5
- 239000011521 glass Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 206010048886 Onychoclasis Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
- B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the technical field of metal recovery, in particular to a waste electrical appliance shell separation and recovery device which comprises a box body, a feeding port, a discharging port, a collecting mechanism and two crushing rollers, wherein the two crushing rollers are rotatably arranged in the box body and are parallel to each other and positioned in the same plane; first conical grooves are uniformly distributed in the circumferential direction of the crushing rollers, crushing nails are arranged in the first conical grooves and hinged in the first conical grooves, and the crushing nails on the two crushing rollers are correspondingly arranged; the collecting mechanism comprises a collecting frame and a collecting plate capable of swinging; the collecting frame and the collecting plate are both positioned below the crushing roller. When the metal frame of the waste electrical appliance shell is separated from the non-metal material and crushed, the integrity of the metal frame is kept so as to facilitate subsequent recycling.
Description
Technical Field
The invention relates to the technical field of metal recovery, in particular to a waste electrical appliance shell separation and recovery device.
Background
With the rapid development of the electronic industry and the wide use of electronic devices, great changes are brought to the production and living modes of human beings, and a series of problems of consuming a large amount of resources and energy, polluting the environment, increasing the amount of wastes and the like are generated.
The housing of the electronic appliance is generally made of iron or steel, and a panel made of light glass non-metal material is usually embedded in a metal frame, the weight of the metal frame of the housing is usually three times of that of the light glass, in the prior art, the metal frame and the panel are usually separated by grinding and then classifying, and the separated material is processed and reused. The method has low processing efficiency, can not be separated during crushing, can not keep the integrity of the metal frame, and can not be directly recycled.
Disclosure of Invention
The invention aims to provide a waste electrical appliance shell separating and recycling device, which can keep the integrity of a metal frame so as to be convenient for subsequent recycling when a non-metal material and the metal frame are separated and crushed.
In order to achieve the purpose, the technical scheme of the invention provides the following basic scheme:
a waste electrical appliance shell separation and recovery device comprises a box body, a feeding port, a discharging port, a collecting mechanism and two crushing rollers rotatably arranged in the box body, wherein the two crushing rollers are parallel and positioned in the same plane; first conical grooves are uniformly distributed in the circumferential direction of the crushing rollers, crushing nails are arranged in the first conical grooves and hinged in the first conical grooves, and the crushing nails on the two crushing rollers are correspondingly arranged; the collecting mechanism comprises a collecting frame and a collecting plate capable of swinging; the collecting frame and the collecting plate are both positioned below the crushing roller.
The technical effect of the scheme is as follows:
1. set up two crushing rollers and be located the coplanar, useless metal casing gets into behind the box can not lead to the metal frame cover to carry out broken crushing roller behind owing to broken non-metallic part by a crushing roller earlier on, and leads to subsequent metal frame separation can't continue.
2. The circumference equipartition that sets up the crushing roller has first bell groove, all has broken nail in the first bell groove, and broken nail articulates in first bell groove, and broken nail on two crushing rollers corresponds the setting. After the waste electrical appliance shell enters the box body, the shell applies downward force to the crushing nail, and the crushing nail moves downward in the first conical groove, so that the metal frame part of the shell is not crushed by the crushing nail; and the broken nail that the casing followed downstream also downstream, increases the distance between metal frame and the next broken nail, further avoids broken nail to carry out the breakage to metal frame, has kept the integrality of metal frame.
3. The collecting mechanism is arranged and comprises a collecting frame and a collecting plate capable of swinging, and the collecting frame and the collecting plate are both positioned below the crushing roller. When the metal frame is not dropped yet, the separated and broken waste electrical appliance shell is broken and dropped firstly by the broken non-metal materials, and then enters the collecting plate, the metal frame drops to the counting plate at last and then presses the collecting plate, the collecting plate swings, the non-metal materials are sent into the collecting frame, and the two materials are separately collected.
By adopting the technical scheme, the waste electrical appliance shell is positioned between the two crushing rollers after entering the box body. The waste electrical appliance shell extrudes the crushing nails of the two crushing rollers, so that the crushing nails hinged in the first conical grooves in the crushing rollers move downwards, and meanwhile, the waste electrical appliance shell also moves downwards. The interval between the metal frame part of the waste electric appliance shell and the next crushing nail is increased, meanwhile, the crushing roller rotates, the waste electric appliance shell moves downwards, and the next crushing nail crushes the waste metal part without damaging the metal frame, so that the integrity of the metal frame is maintained. When the metal frame has not fallen yet, non-metallic material has fallen to the collecting board, and non-metallic material is collected by the collecting board, and the metal frame drops on wobbling collecting board at last, through wobbling collecting board, sends the non-metallic material in the collecting board into the collecting frame, makes two kinds of materials separately collected. Compared with the prior art, the shell is uniformly broken and then classified, the classified shell is processed and then manufactured again, the integrity of the metal frame is kept, and the metal frame is recycled more efficiently.
Further, the collecting plate is arranged below the side of the collecting frame, a supporting point is arranged in the middle of the collecting plate, and the collecting plate can be used for bearing the metal frame and collecting non-metal materials.
Set up the side below that the collecting plate is located the collection frame, the middle part of collecting plate is equipped with the fulcrum, and the collecting plate collects the non-metallic material that drops on the metal frame earlier, and after the metal frame dropped, prizes the collecting plate, makes the non-metallic material on the collecting plate be thrown to the collection frame in, makes metal frame and non-metallic material collect respectively, and can separate non-metallic material and broken dust.
Furthermore, the inside vice crushing roller that is equipped with of crushing roller, sliding connection between vice crushing roller and the crushing roller, the crushing roller can be separated into two parts along circumference, and two parts of the crushing roller after the separation are connected through vice crushing roller. Set up inside vice crushing roller that has of crushing roller, sliding connection between vice crushing roller and the crushing roller, the axial stretch can be followed at the crushing roller both ends and be divided into two parts, and the crushing roller is stretched when the width increase of the broken metal frame of needs, makes the crushing roller after the stretching and vice crushing roller form an organic whole and can carry out broken separation to the useless electrical apparatus shell of different specifications.
Furthermore, a second taper groove is formed in the circumferential direction of the auxiliary crushing roller, a groove used for containing the crushing nail is formed in the closing opening of the second taper groove, and the crushing nail is connected with the groove through a reset spring.
A second conical groove is formed in the circumferential direction of the auxiliary crushing roller, a groove for containing the crushing nails is formed in the closing opening of the second conical groove, the crushing nails are connected with the groove through a return spring, the return spring is compressed when the crushing roller is not stretched, and the crushing nails are accommodated in the groove; after the crushing roller is stretched, the crushing nails are ejected out of the grooves by the springs, and the crushing nails on the crushing roller crush the waste metal shell.
Further, be provided with two stoppers in the box, the stopper sets up in pan feeding mouth department, but two stoppers centre gripping metal frame.
Two limiting blocks are arranged at the inner side of the box body of the port, and the distance between the two limiting blocks is matched with the thickness of the metal frame, so that the metal frame can be clamped. When the feeding is broken, the metal frame is stably in an upright state by the limiting block, and the metal frame is prevented from being sleeved on the crushing roller due to inclination in the breaking process, so that the operation of the whole device is influenced.
Furthermore, the collecting frame is detachably connected on the side wall of the box body.
The connection can be dismantled on the box lateral wall to the frame of collecting in the setting, collects the frame and can take out at any time when filling with broken thing when broken and collect the frame, then installs again and go, does not influence inside broken useless metal casing's progress, has improved the efficiency of work.
Drawings
FIG. 1 is a front sectional view of a waste electrical apparatus casing separating and recovering apparatus according to the present invention;
FIG. 2 is a schematic view of the waste electrical apparatus casing separating and recovering device in a state of classifying and recovering;
FIG. 3 is an enlarged view of the AO of FIG. 1;
FIG. 4 is a top cross-sectional view of a crushing roller.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include:
the device comprises a box body 1, a crushing roller 2, a crushing nail 3, a feeding port 4, a limiting block 5, a waste electrical apparatus shell 6, light glass 6a, a metal frame 6b, a collecting frame 7, a collecting plate 8, an auxiliary crushing roller 9, a pressure spring 10, a first discharging port 11, a second discharging port 12, a conical groove 13, a groove 14, a rotating shaft 15 and a baffle 16.
The embodiments are substantially as shown in figures 1, 2, 3 and 4 of the accompanying drawings:
as shown in figure 1, the waste electrical appliance shell separating and recycling device comprises a box body 1, a collecting mechanism and two crushing rollers 2. A funnel-shaped feeding port 4 is formed in the outer side of the top of the box body 1, and the lower end of the feeding port 4 is communicated with the interior of the box body 1; the inboard stopper 5 that corresponds with pan feeding mouth 4 positions that is provided with in 1 top of box, the interval between stopper 5 is wider 1cm than the thickness of waste electrical apparatus shell 6. As shown in fig. 4, the crushing roller 2 is connected to an output shaft (not shown) of a motor through a rotating shaft 15, and is controlled to rotate by the motor.
As shown in fig. 1, the two crushing rolls 2 are parallel and located on the same horizontal plane, and a motor (not shown) is arranged in the box 1, and the motor controls the two crushing rolls 2 to rotate in opposite directions, wherein the left crushing roll 2 moves clockwise. The circumference equipartition of crushing roller 2 has tapered groove 13 (be equipped with eight on a circumference, and specific quantity can be decided by the crushing roller size, and is preferred eight here), as shown in fig. 3, there is broken nail 3 in the receipts mouth department of tapered groove 13 through hinged joint, and broken nail 3 on two crushing rollers 2 is the same in position, and when the broken nail 3 of same position was in same horizontal line, the interval between the free end of two broken nails 3 was 1 cm.
As shown in fig. 4, the inner portion of the crushing roller 2 is coaxially provided with a sub-crushing roller 15, and the surface of the sub-crushing roller 9 is provided with a slide rail (not shown) in the axial direction. Pulling the upper and lower ends of the crushing roller 2, the crushing roller 2 can be separated into an upper part and a lower part and can slide up and down along the slide rail on the auxiliary crushing roller 9, and the stretched auxiliary crushing roller 9 and the crushing roller 2 form a whole. The circumferential direction of the auxiliary crushing roller 9 is provided with a conical groove 13 with the same structure as the conical groove 13 on the crushing roller 2, the closing port of the conical groove 13 on the auxiliary crushing roller 9 is provided with a groove 14 arranged towards the axis of the auxiliary crushing roller 9, the bottom of the groove 14 is welded with a pressure spring 10, and the other end of the pressure spring 10 is connected with the crushing nail 3 through a hinge. When the compression spring 10 is completely compressed, the breaking nails 3 are completely hidden in the tapered grooves 13 and the grooves 14.
As shown in fig. 1, the collecting mechanism comprises a collecting frame 7 and a collecting plate 8, the collecting frame 7 is positioned on the inner wall of the left side of the box body 1 below the left crushing roller 2, the upper side of the collecting frame 7 is not closed, the right side of the collecting frame is inclined upwards from left to right, and the inclination angle is 45 degrees; the left side of the collecting frame 7 is inserted on the left side wall of the box body 1. The collecting plate 8 is positioned at the bottom in the box body 1 of the right crushing roller 2, and the right side of the collecting plate 8 is provided with a vertical part; a supporting rod is inserted in the middle of the collecting plate 8 in a penetrating mode, the supporting rod is welded with the inner wall of the box body 1, and the left side and the right side of the collecting plate 8 can swing up and down by taking the supporting rod as a base point. A baffle 16 is arranged at the lower right of the collecting plate 8, the right end of the baffle 16 is welded on the right side wall of the box body 1, and the lower right end of the collecting plate 8 is abutted against the baffle 16; as shown in fig. 2, when the metal frame 6b presses the left side of the collecting plate 8 downward, the left lower surface of the collecting plate 8 abuts against the left end of the baffle 16, thereby preventing the collecting plate 8 from turning over and hanging on the metal frame 6 b.
As shown in figure 1, a first discharge port 11 is arranged at the position of the collecting frame 7, the first discharge port 11 is connected with a panel through a hinge, and the panel and the box body 1 are integrated into a whole when the first discharge port 11 is in a closed state. A second discharge hole 12 is formed in the lower portion of the left side wall of the box body 1, the second discharge hole 12 is also connected with a panel through glue, and the panel and the box body 1 are integrated when the second discharge hole 12 is closed.
The specific implementation process is as follows:
A. separate crushing
As shown in FIG. 1, the waste electrical apparatus housing 6 is vertically placed in the feeding port 4, and the waste electrical apparatus housing 6 vertically enters the box body 1 and is positioned between the two crushing rollers 2. When the motor is started, the two crushing rollers 2 move in opposite directions, and the lower end of the metal frame 6b in the waste electrical appliance shell 6 falls to the position of the crushing nail 3, the crushing nail 3 is pressed down due to the large mass of the metal frame 6b, so that the crushing nail 3 cannot be crushed to the metal frame 6b, and the metal frame 6b is prevented from being damaged.
The crushing roller 2 continues to rotate, the waste electrical appliance shell 6 continues to fall, and the waste electrical appliance shell 6 clamped by the limiting block 5 is always in a vertical state. Light glass 6a in waste electrical apparatus shell 6 falls to meeting with broken nail 3, and broken nail 3 carries out the breakage to light glass 6a, and broken thing falls to collecting plate 8 and the right-hand member that slides down to collecting plate 8. When the upper end of the metal frame 6b meets the breaking nail 3, the light glass 6a is broken, and the metal frame 6b of only one frame body presses down the breaking nail 3 again, so that the breaking nail 3 cannot break to the metal frame 6b, and the integrity of the metal frame 6b is maintained.
C. Discharging
As shown in fig. 2, the crushing roller 2 continues to rotate, the light glass 6a falls entirely on the collecting plate 8 and slides down to the right end of the collecting plate 8, and the upper end of the metal frame 6b falls to the left end of the collecting plate 8 with the rotation of the crushing roller 2. Because the middle part of the collecting plate 8 is provided with a fulcrum, the left end of the collecting plate 8 is pressed down by the metal frame 6b, so that the right end of the collecting plate 8 is tilted, the light glass 6a at the right end of the collecting plate 8 is thrown in the tilting moment, and the light glass 6a is thrown into the collecting frame 7. When the left side of the collecting plate 8 is pressed downwards to abut against the left end of the baffle 16, the collecting plate 8 stops rotating and cannot turn over. Since a large amount of dust is generated during the crushing and settled on the collecting plate 8, the non-metal and the dust can be separated during the process of the collecting plate 8 throwing up the light glass 6 a.
After the metal frame 6b presses the collecting plate 8 downwards, the right end of the collecting plate 8 is tilted upwards, so that the metal frame 6b slides leftwards. The metal frame 6b sliding leftwards jacks the hinged panel at the second discharge hole 12 outwards, and the second discharge hole 12 is opened, so that the metal frame 6b can be taken out. After the non-metal part 6a falls into the collection frame 7, the panel at the first discharge hole 11 which is hinged is opened, the collection frame 7 is taken out from the first discharge hole 11, the collection frame 7 can be cleaned, and the classified collection of the metal frame 6b and the light glass 6a is completed.
The above steps are repeated, and the waste metal shells 6 can be treated in batch.
Claims (5)
1. The utility model provides a useless electrical apparatus shell separation recovery unit, includes box, pan feeding mouth and discharge gate, its characterized in that: the device also comprises a collecting mechanism and two crushing rollers which are rotatably arranged in the box body, wherein the two crushing rollers are parallel and positioned in the same plane; first conical grooves are uniformly distributed in the circumferential direction of the crushing rollers, crushing nails are arranged in the first conical grooves, the crushing nails are hinged in the first conical grooves, and the crushing nails on the two crushing rollers are correspondingly arranged; the collecting mechanism comprises a collecting frame and a collecting plate capable of swinging; the collecting frame and the collecting plate are both positioned below the crushing roller; the collecting plate is arranged below the side of the collecting frame, a fulcrum is arranged in the middle of the collecting plate, and the collecting plate can bear the metal frame and collect the non-metal materials; the right side below of collecting plate is equipped with the baffle, and the right-hand member welding of baffle is on the right side wall of box, and the right lower extreme of collecting plate offsets with the baffle.
2. The waste electrical apparatus shell separating and recycling device according to claim 1, characterized in that: the inside coaxial vice crushing roller that is equipped with of crushing roller, sliding connection between vice crushing roller and the crushing roller, the crushing roller can be divided into two parts along circumference, and two parts of the crushing roller after the partition are connected through vice crushing roller.
3. The waste electrical apparatus shell separating and recycling device according to claim 2, characterized in that: the secondary crushing roller is circumferentially provided with a second taper groove, a groove for containing the crushing nail is arranged at the closing-up part of the second taper groove, and the crushing nail is connected with the groove through a reset spring.
4. The waste electrical apparatus shell separating and recycling device according to claim 1, characterized in that: be provided with two stoppers in the box, the stopper sets up in pan feeding mouth department, but two stoppers centre gripping metal frame.
5. The waste electrical apparatus shell separating and recycling device according to claim 1, characterized in that: the collecting frame is detachably connected on the side wall of the box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811564744.0A CN109647572B (en) | 2018-12-20 | 2018-12-20 | Waste electrical apparatus shell separation recovery unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811564744.0A CN109647572B (en) | 2018-12-20 | 2018-12-20 | Waste electrical apparatus shell separation recovery unit |
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| Publication Number | Publication Date |
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| CN109647572A CN109647572A (en) | 2019-04-19 |
| CN109647572B true CN109647572B (en) | 2020-12-01 |
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| CN201811564744.0A Active CN109647572B (en) | 2018-12-20 | 2018-12-20 | Waste electrical apparatus shell separation recovery unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110339923B (en) * | 2019-05-22 | 2020-11-10 | 徐州诚凯知识产权服务有限公司 | Urban refuse incineration power generation equipment |
| CN110523513A (en) * | 2019-09-11 | 2019-12-03 | 东莞市长锦成电器有限公司 | A kind of shredding machine of the motor comprising great heat radiation effect |
| CN111718718B (en) * | 2020-04-16 | 2021-08-31 | 福建省环境保护设计院有限公司 | Repairing agent for repairing hexavalent chromium-polluted soil and method for repairing hexavalent chromium-polluted soil by using repairing agent |
| CN114289114B (en) * | 2021-12-24 | 2023-04-18 | 合肥学院 | Broken recovery plant of liquid crystal glazing waste material |
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| CN205903957U (en) * | 2016-04-01 | 2017-01-25 | 山东天振药业有限公司 | Device is smashed to high -efficient continuous type plastics |
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Application publication date: 20190419 Assignee: NINGBO HIGH-TECH ZONE SHENTAIDE MACHINERY EQUIPMENT Co.,Ltd. Assignor: XIANGSHAN DUIPENG ELECTRONIC TECHNOLOGY Co.,Ltd. Contract record no.: X2021330000231 Denomination of invention: A separation and recovery device for waste electrical appliance shell Granted publication date: 20201201 License type: Common License Record date: 20210904 Application publication date: 20190419 Assignee: NINGBO DESHEN MACHINERY EQUIPMENT Co.,Ltd. Assignor: XIANGSHAN DUIPENG ELECTRONIC TECHNOLOGY Co.,Ltd. Contract record no.: X2021330000252 Denomination of invention: A separation and recovery device for waste electrical appliance shell Granted publication date: 20201201 License type: Common License Record date: 20210904 Application publication date: 20190419 Assignee: NINGBO LONGRUI MACHINERY MANUFACTURE Co.,Ltd. Assignor: XIANGSHAN DUIPENG ELECTRONIC TECHNOLOGY Co.,Ltd. Contract record no.: X2021330000229 Denomination of invention: A separation and recovery device for waste electrical appliance shell Granted publication date: 20201201 License type: Common License Record date: 20210903 |
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Assignee: NINGBO HIGH-TECH ZONE SHENTAIDE MACHINERY EQUIPMENT Co.,Ltd. Assignor: XIANGSHAN DUIPENG ELECTRONIC TECHNOLOGY CO.,LTD. Contract record no.: X2021330000231 Date of cancellation: 20240220 Assignee: NINGBO LONGRUI MACHINERY MANUFACTURE CO.,LTD. Assignor: XIANGSHAN DUIPENG ELECTRONIC TECHNOLOGY CO.,LTD. Contract record no.: X2021330000229 Date of cancellation: 20240220 Assignee: NINGBO DESHEN MACHINERY EQUIPMENT Co.,Ltd. Assignor: XIANGSHAN DUIPENG ELECTRONIC TECHNOLOGY CO.,LTD. Contract record no.: X2021330000252 Date of cancellation: 20240220 |