CN210634114U - Mould of adjustable car sunshade screen handle bending process usefulness - Google Patents
Mould of adjustable car sunshade screen handle bending process usefulness Download PDFInfo
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- CN210634114U CN210634114U CN201921144601.4U CN201921144601U CN210634114U CN 210634114 U CN210634114 U CN 210634114U CN 201921144601 U CN201921144601 U CN 201921144601U CN 210634114 U CN210634114 U CN 210634114U
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- 238000005452 bending Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title description 7
- 238000007493 shaping process Methods 0.000 claims description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 230000008093 supporting effect Effects 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 238000003801 milling Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 238000003754 machining Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- WJXQFVMTIGJBFX-UHFFFAOYSA-N 4-methoxytyramine Chemical compound COC1=CC=C(CCN)C=C1O WJXQFVMTIGJBFX-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229920006178 high molecular weight high density polyethylene Polymers 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
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Abstract
The utility model relates to the technical field of automobile part manufacturing, and discloses a mold for bending an adjustable automobile sunshade curtain handle, aiming at the problem that the mold is required to be milled when the hardness of the automobile sunshade curtain handle is changed greatly or the radian is changed, and the operation is inconvenient; two ends of the upper die base are connected with two ends of the upper die through elastic jacking pieces; the bending forming part is provided with a lower edge which is convex arc-shaped, when the die is bent, the middle of the lower edge firstly presses the upper die, and the lower die fixing blocks are dispersedly arranged on two sides of the middle part of the lower die. The utility model discloses a mould can require adjustment mould bending radian according to handle material hardness and radian, has avoided the milling process to the mould, has improved operation flexibility and work efficiency, and the course of working is reliable and stable, the machining precision also can be ensured and promotion.
Description
Technical Field
The utility model relates to an automobile parts makes technical field, concretely relates to mould that adjustable car sunshade screen handle bending process used.
Background
The automobile sun-shading curtain can be used for effectively shading the sunlight of the front windshield and the side rear windshield of an automobile. At present, the handle of the automobile sun-shading curtain is bent mainly by iron mold processing operation. But the crooked radian of swage is fixed, all needs the milling die radian when the hardness change of handle material is great or the crooked radian of handle changes, and the bending work load of car sunshade screen handle is big just loaded down with trivial details like this, and the operation is extremely inconvenient.
Chinese patent CN204673862U, entitled a mold for a universal handle of an automobile, which comprises a front template, an upper T-shaped block, an upper template, a front mold core, a rear mold core, a mold base, a positioning pin, a limiting block and a positioning block, wherein an inclined hole matched with the front mold core is arranged in the upper template; the front mold core rotates in the inclined hole of the upper mold plate; the rear mold core is fixed with the mold base through screws; the front template is fixedly connected with the upper T-shaped block through screws. The mould is suitable for plastic parts, can avoid parting lines on the surface of the plastic part, but is not suitable for bending the handle of the sun-shading curtain.
SUMMERY OF THE UTILITY MODEL
There is the iron set processing of adoption to present car sunshade screen handle bending, needs milling jig when car sunshade screen handle hardness changes great or the radian changes, the inconvenient problem of operation, the utility model aims to provide a mould that adjustable car sunshade screen handle bending used goes up mould and lower mould flexible, can change crooked radian according to the processing requirement, and the flexible operation improves work efficiency.
The utility model provides a following technical scheme:
a mould for bending and processing an adjustable automobile sun-shading curtain handle comprises an upper mould base which can be driven by a power device to lift, a bending forming part connected with the upper mould base, a bendable upper mould arranged below the bending forming part, a bendable lower mould matched with the upper mould for use, and a plurality of lower mould fixing blocks for supporting the lower mould;
the two ends of the upper die base are connected with the two ends of the upper die through elastic jacking pieces;
the bending forming part is provided with a lower edge extending along the length direction of the upper die, the lower edge is in an arc shape with a middle lower arch and two sides retracting, and when the die is bent, the middle lower arch part of the lower edge firstly presses the upper die;
the lower die fixing blocks are dispersedly arranged on two sides of the middle part of the lower die.
The utility model discloses a mould adopts flexible last mould and lower mould to set up elasticity roof pressure spare and be connected with the upper die base at the handle both ends. When the handle of the automobile sun-shading curtain is bent, the handle to be processed is placed on the lower die, and then the upper die base is driven by the power device to drive the bending forming part and the upper die to descend. When the upper die is attached to the handle of the automobile sunshade curtain and matched with the lower die, the upper die cannot move downwards any more, the bending forming part continues to move downwards and pushes against the upper die, the upper die is bent under the pushing of the bending forming part, and the lower die fixing blocks are dispersed on two sides of the middle part of the lower die, so that the middle part of the lower die is short of support, and the upper die and the lower die are bent under the pushing of the lower die, and the handle of the automobile sunshade curtain is bent. Meanwhile, the two ends of the upper die and the upper die base are pressed by the elastic pressing piece, the elastic pressing piece retracts in the bending process of the upper die and is always in a state of pressing the upper die, so that the two ends of the upper die are pressed against the lower die, the two ends of the upper die are prevented from being excessively tilted to be separated from the automobile sunshade curtain handle, the bending radian of the automobile sunshade curtain handle is ensured to be the same as the bending radians of the upper die and the lower die, and therefore when the automobile sunshade curtain handle is bent to the required radian, for example, the upper die is attached to the lower edge of the bending forming part, the upper die base stops pressing down, then rises to be separated from the automobile sunshade curtain, and the bending processing of the. Because the upper die and the lower die can be bent, the bending radian can be changed along with the requirements of the hardness and the radian of the handle of the automobile sun-shading curtain, the milling is avoided, the operation is flexible, and the working efficiency is high.
As the utility model discloses a preferred, bending forming portion includes a plurality of length direction parallel arrangement's of going up the mould height-adjusting unit, locates the design top briquetting of height-adjusting unit below, design top briquetting is equipped with outer face of cylinder, and the axis of outer face of cylinder is parallel with the width direction of last mould, bending forming portion's lower limb comprises the outer face of cylinder of the design top briquetting of arranging in proper order.
The height of the fixed pressing block is adjusted and shaped through the heightening unit, the bending radian of the lower edge of the bending forming part is changed, the bending processing requirements of automobile sunshade curtain handles with different radians can be met, and meanwhile, the stability and the processing precision of the processing process are improved.
As the utility model discloses a preferred, heighten the unit and include the fixed bottom plate and two V type connecting rods be connected with the upper fixed plate that the upper die base is connected, with design roof pressure piece, two the opening of V type connecting rod is arranged in opposite directions, and the last connecting rod of same V type connecting rod rotates with the fixed bottom plate to be connected, lower connecting rod and fixed bottom plate rotate to be connected, go up the connecting rod and rotate to be connected between the connecting rod down, heighten the unit and still rotate the locking regulation pole of junction distance including the last connecting rod of adjusting two V type connecting rods and lower connecting rod.
The upper connecting rod of the V-shaped connecting rod is rotatably connected with the upper fixing plate, the lower connecting rod of the V-shaped connecting rod is rotatably connected with the lower fixing plate, and the upper connecting rod is rotatably connected with the lower connecting rod, so that two V-shaped connecting rods with opposite openings form an approximate quadrilateral rod frame which can be connected in a deformable manner. According to the bending radian of the handle of the automobile sunshade curtain to be processed, the horizontal distance between the top points of the two V-shaped connecting rods is adjusted through the locking adjusting handle, so that the length of the vertical direction of the two V-shaped connecting rods is changed, the height of the shaping jacking block is adjusted, the bending radian of the lower edge of the bending forming part is changed, the handle is adapted to the handle of the automobile sunshade curtain, the operation is convenient, the adaptability is high, and the processing precision is high.
As the utility model discloses a preferred, the length of design top briquetting is greater than the width of mould, still is equipped with the side shield respectively at the both ends of being close to the design top briquetting at bending forming portion both ends. The side baffle can prevent the upper die and the lower die from being staggered in the horizontal direction, and the processing stability and precision are improved.
As the utility model discloses a preferred, the both sides of going up the mould still are equipped with even board respectively, even the one end of board with go up the mould and be connected, the other end is equipped with the stroke slot hole that extends along the length direction who links the board, the both ends of encircleing the design top briquetting at position down in the middle are equipped with the bayonet lock, in bayonet lock slidable card stroke slot hole. The two ends of the shaping jacking block are connected with the two sides of the upper die through connecting plates, so that the upper die is prevented from being dislocated with the bending forming part, and the upper die base can be continuously pressed down to bend the upper die and the lower die after the middle lower arch part is allowed to contact the upper die through the stroke long hole.
As the utility model discloses a preferred, the lower mould fixed block including support the base, locate the steady high structure of elasticity on supporting the base, can wind the steady high structure pivoted lower mould fixed plate of elasticity. Because operating mode condition and processing design error, the height of a plurality of lower mould fixed blocks probably has the difference, can't obtain suitable support when the lower mould pushes down like this, can cause car sunshade screen bending machining precision to lead to the processing defective percentage to promote. Therefore, the elastic height stabilizing structure is arranged, the lower die can be contacted with each lower die fixing block by utilizing the self gravity of the lower die and the pressure when the lower die starts to be pressed and bent, the lower die is properly supported, and the processing stability is improved.
As the utility model discloses a preferred, the steady high structure of elasticity is including locating the connecting plate that supports nitrogen spring on the base, be connected with nitrogen spring's piston rod, locating the connector on the connecting plate, be equipped with the cooperation recess that can hold the connector on the lower surface of lower mould fixed plate, after the connector stretched into the cooperation recess, the pivot that passes lower mould fixed plate, cooperation recess and connector in proper order along the length direction of lower mould fixed plate through the one end from the lower mould fixed plate was connected with the lower mould fixed plate, and the pivot is rotated with the connector and is connected. Make the lower mould fixed plate like this can overturn under the pivot drives, lower mould fixed plate keeps the horizontal support lower mould when beginning, and when pressure increased makes the lower mould crooked, the lower mould fixed plate also leaned in under the lower mould effect, makes the lower mould fixed plate can provide the face supporting effect for the lower mould at whole crooked in-process, has improved stability, the precision of processing.
As the utility model discloses a preferred, the mould still includes the mould base, be equipped with the guide post in the upper die base adaptation on the mould base. The guide post can make the upper die base stably go up and down, improves operating stability.
The utility model has the advantages as follows:
the utility model discloses a mould is used for the bending of car sunshade screen handle, can require the crooked radian of adjustment mould according to the material hardness and the radian of handle, compares the milling process of having avoided the mould with current processing mode, has improved the flexibility and the work efficiency of operation, and the course of working is reliable and stable moreover, the machining precision also can be ensured and promotion.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a left side view of the present invention.
Fig. 3 is a plan view of the lower mold, the lower mold fixing block, and the mold base.
Fig. 4 is a structural view of the height adjusting unit.
Fig. 5 is a partial enlarged view of a portion a of fig. 1.
Fig. 6 is a structural view of a lower die fixing block.
1. The device comprises an upper die base, 11, an elastic jacking part, 12, a guide column, 2, a bending forming part, 21, a height adjusting unit, 211, an upper connecting rod, 212, a lower connecting rod, 213, a locking adjusting rod, 214, a locking block, 215, a movable handle, 216, an upper fixing plate, 217, a lower fixing plate, 22, a shaping jacking block, 221, an outer cylindrical surface, 222, a clamping pin, 23, a side baffle, 3, an upper die, 31, a connecting plate, 32, a stroke long hole, 4, a lower die, 41, a positioning block, 5, a lower die fixing block, 51, a supporting base, 511, a sliding lug, 52, an elastic height stabilizing structure, 521, a nitrogen spring, 522, a connecting plate, 523, a connector, 524, a pull rod, 53, a lower die fixing plate, 531, a matching groove, 532, a rotating shaft, 6 and a.
Detailed Description
The following further describes the embodiments of the present invention.
As shown in fig. 1, a mould that crooked processing of adjustable car sun visor curtain handle was used, including the upper die base 1 that can be gone up and down by power device drive, be connected with bending portion 2 at the lower surface of upper die base, be equipped with flexible last mould 3 and flexible lower mould 4 below bending portion, the lower mould setting is in last mould below, and the bending is man-hour with last mould cooperation use, goes up the material of the conventional flexible deformation of mould and lower mould selection for use, like high molecular weight high density polyethylene HMPE. As shown in fig. 3, a positioning block 41 for positioning the handle to be processed is provided on the lower mold. And 4 lower die fixing blocks 5 are arranged below the lower die, and are symmetrically arranged on two sides of the middle part of the lower die. The two ends of the upper die are connected with the two ends of the upper die base through elastic pressing pieces 11, and the elastic pressing pieces used in the embodiment are air springs. The lower edge of the bending forming part close to the upper die is in a convex arc shape: the middle part is arched downwards, the two sides are retracted, and during bending, the middle arched part of the lower edge of the bending part firstly presses the upper die.
In this embodiment, the mold is further provided with a mold base 6, as shown in fig. 2, the mold base is provided with a guide post 12 adapted to the upper mold base, and the upper end of the guide post is connected to the upper mold base, which facilitates the stable descending and ascending of the upper mold base.
In the present embodiment, the bending forming portion is composed of 15 height-adjusting units 21 and a shaping top pressing block 22 connected below the height-adjusting units, the height-adjusting units are connected with the upper die base and are sequentially arranged in parallel along the length direction of the upper die, and in other embodiments, the number of the height-adjusting units can be increased or decreased according to the length requirement of the handle to be processed. The shaping jacking block is provided with an outer cylindrical surface 221, the axis of the outer cylindrical surface is parallel to the width direction of the upper die, and the lower edge of the bending forming part is composed of the outer cylindrical surfaces of the shaping jacking blocks which are arranged in sequence.
As shown in fig. 4, the shaping jacking block is semi-cylindrical, the height-adjusting unit comprises two V-shaped connecting rods with opposite openings, an upper fixing plate 216 connected with the upper die base, and a lower fixing plate 217 connected with the shaping jacking block, and the lower fixing plate is fixedly attached to the circumferential outer plane of the shaping jacking block through bolts. The V-shaped connecting rod comprises an upper connecting rod 211 rotatably connected with the upper fixing plate and a lower connecting rod 212 rotatably connected with the lower fixing plate, and the upper connecting rod and the lower connecting rod are rotatably connected, so that the height adjusting unit is in a deformable approximate quadrilateral connecting rod shape consisting of the two V-shaped connecting rods. A locking adjusting rod 213 and a locking block 214 are arranged between the two V-shaped connecting rods, the locking adjusting rod is provided with external threads, the end parts of the upper connecting rod and the lower connecting rod are provided with connecting lugs, the upper connecting rod and the lower connecting rod are connected through the connecting lugs and pin shafts penetrating through the connecting lugs, thus, a perforation is formed at the top part of the V-shaped connecting rod, the locking block is arranged on the lower connecting rod near a perforation of the heightening unit, the locking block is provided with a threaded through hole, the locking adjusting rod is matched with the threaded through hole after penetrating through the other perforation of the heightening unit, one end of the locking adjusting rod far away from the locking block is provided with a limiting block matched with the perforation, the heightening unit is also provided with a movable handle 215 which can be in screw socket joint with the locking adjusting rod, the movable handle is screwed on the locking adjusting rod, then the movable handle is rotated to lead the locking adjusting rod to be screwed in, the bending radian of the lower edge of the bending forming part is changed, and the processing requirements of different automobile sunshade curtain handles are met.
As shown in fig. 5, two sides of the upper die are respectively provided with a connecting plate 31, one end of the connecting plate is connected with the upper die, the other end is provided with a stroke long hole 32 extending along the length direction of the connecting plate, two ends of the shaping top pressing block at the middle lower arch part are provided with clamping pins 222, and the clamping pins can be clamped into the stroke long holes in a sliding manner. The length of the shaping top pressing block is larger than the width of the upper die, and side baffles 23 are respectively arranged at two ends of the shaping top pressing block close to two ends of the bending forming part.
As shown in fig. 6, the lower mold fixing block includes a supporting base 51, an elastic height stabilizing structure 52 provided on the supporting base, and a lower mold fixing plate 53 rotatable around the elastic height stabilizing structure. The two sides of the supporting base are provided with sliding lugs 511, the die base is provided with sliding rails matched with the sliding lugs, and the sliding lugs are matched with the sliding rails to adjust the position of the lower die fixing block according to the processing requirement. The steady high structure of elasticity is including locating nitrogen spring 521 on the support base, connecting plate 522 of being connected with nitrogen spring's piston rod, locate connector 523 on the connecting plate, still be equipped with the connecting rod 524 of joint support base and connecting plate on the lower mould fixed block, prevent that the connecting plate from slipping on nitrogen spring, be equipped with the cooperation recess 531 that can hold the connector on the lower surface of lower mould fixed plate, the connector stretches into behind the cooperation recess, the length direction of passing the lower mould fixed plate in proper order along the lower mould fixed plate through the one end from the lower mould fixed plate, the pivot 532 of cooperation recess and connector is connected with the lower mould fixed plate, the pivot rotates with the connector.
The working process of the mould of the utility model is as follows, the mould is placed on the power device, the power device is a conventional driving device, the hydraulic machine is selected in the embodiment, then the height of each positioning top pressing block is changed according to the processing requirement, the bending radian of the lower edge is set, the automobile sunshade curtain handle to be processed is placed on the lower mould, the hydraulic machine is started after the positioning block is fixed, the upper mould base drives the upper mould to move down to be attached to the handle, then the upper mould base is continuously descended, because the two ends of the upper mould are connected with the two ends of the upper mould base through the air spring, the middle part of the upper mould starts to be pressed by the middle convex shaping top pressing block in the middle of the bending forming part, the middle stress of the upper mould has the bending trend, the air springs at the two ends are compressed, the upper mould is bent, because the two ends of the upper mould and the two, and the lower die fixing plate on the lower die fixing block inclines to provide surface support for the lower die, the upper die base continues to descend to press the upper die, the upper die is bent to the lower edge of the preset radian of the laminating bending forming part, then the hydraulic press drives the upper die base to ascend, the upper die is separated from the automobile sunshade curtain handle, and the automobile sunshade curtain handle is taken down to complete processing.
Claims (8)
1. A mould for bending and processing an adjustable automobile sun-shading curtain handle is characterized by comprising an upper mould base, a bending forming part, a bendable upper mould, a bendable lower mould and a plurality of lower mould fixing blocks, wherein the upper mould base can be driven by a power device to lift, the bending forming part is connected with the upper mould base, the bendable upper mould is arranged below the bending forming part, the bendable lower mould is matched with the upper mould to be used, and the lower mould fixing blocks support the lower mould;
the two ends of the upper die base are connected with the two ends of the upper die through elastic jacking pieces;
the bending forming part is provided with a lower edge extending along the length direction of the upper die, the lower edge is in an arc shape with a middle lower arch and two sides retracting, and when the die is bent, the middle lower arch part of the lower edge firstly presses the upper die;
the lower die fixing blocks are arranged on two sides of the middle part of the lower die.
2. The mold for bending and processing the adjustable handle of the automobile sun-shading curtain as claimed in claim 1, wherein the bending and forming part comprises a plurality of height-adjusting units arranged in parallel along the length direction of the upper mold and a shaping top pressing block arranged below the height-adjusting units, the shaping top pressing block is provided with an outer cylindrical surface, the axis of the outer cylindrical surface is parallel to the width direction of the upper mold, and the lower edge of the bending and forming part is composed of the outer cylindrical surfaces of the shaping top pressing blocks which are arranged in sequence.
3. The adjustable mold for bending the handle of the automobile sun-shading curtain as claimed in claim 2, wherein the height-adjusting unit comprises an upper fixing plate connected with the upper mold base, a lower fixing plate connected with the shaping jacking block, and two V-shaped connecting rods, openings of the two V-shaped connecting rods are arranged in opposite directions, an upper connecting rod of the same V-shaped connecting rod is rotatably connected with the upper fixing plate, a lower connecting rod is rotatably connected with the lower fixing plate, and the upper connecting rod is rotatably connected with the lower connecting rod, and the height-adjusting unit further comprises a locking adjusting rod for adjusting the distance between the rotatably connected positions of the upper connecting rod and the lower connecting rod of the two V-shaped connecting rods.
4. The mold for bending and processing the adjustable handle of the automobile sun-shading curtain as claimed in claim 2 or 3, wherein the length of the shaping top pressing block is greater than the width of the upper mold, and side baffles are respectively arranged at two ends of the shaping top pressing block close to two ends of the bending and forming part.
5. The mold for bending and processing the adjustable handle of the automobile sun-shading curtain as claimed in claim 2 or 3, wherein the two sides of the upper mold are respectively provided with a connecting plate, one end of the connecting plate is connected with the upper mold, the other end of the connecting plate is provided with a stroke long hole extending along the length direction of the connecting plate, two ends of the shaping top pressing block at the middle lower arch part are provided with clamping pins, and the clamping pins can be clamped into the stroke long holes in a sliding manner.
6. The mold for bending and processing the adjustable handle of the automobile sun-shading curtain as claimed in claim 1, wherein the lower mold fixing block comprises a supporting base, an elastic height-stabilizing structure arranged on the supporting base, and a lower mold fixing plate capable of rotating around the elastic height-stabilizing structure.
7. The adjustable mold for bending the handle of the automobile sun-shading curtain as claimed in claim 6, wherein the elastic height stabilizing structure comprises a nitrogen spring arranged on the supporting base, a connecting plate connected with a piston rod of the nitrogen spring, and a connector arranged on the connecting plate, a matching groove capable of accommodating the connector is arranged on the lower surface of the lower mold fixing plate, the connector extends into the matching groove, and is connected with the lower mold fixing plate through a rotating shaft which sequentially penetrates through the lower mold fixing plate, the matching groove and the connector along the length direction of the lower mold fixing plate from one end of the lower mold fixing plate, and the rotating shaft is rotatably connected with the connector.
8. The mold for bending the handle of the adjustable automobile sun-shading curtain as claimed in claim 1, further comprising a mold base, wherein the mold base is provided with a guide column adapted to the upper mold base, and the upper end of the guide column is connected with the upper mold base.
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CN201921144601.4U CN210634114U (en) | 2019-07-19 | 2019-07-19 | Mould of adjustable car sunshade screen handle bending process usefulness |
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CN201921144601.4U CN210634114U (en) | 2019-07-19 | 2019-07-19 | Mould of adjustable car sunshade screen handle bending process usefulness |
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CN201921144601.4U Expired - Fee Related CN210634114U (en) | 2019-07-19 | 2019-07-19 | Mould of adjustable car sunshade screen handle bending process usefulness |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114101485A (en) * | 2021-08-09 | 2022-03-01 | 宁波裕民机械工业有限公司 | Adjustable bending die |
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2019
- 2019-07-19 CN CN201921144601.4U patent/CN210634114U/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114101485A (en) * | 2021-08-09 | 2022-03-01 | 宁波裕民机械工业有限公司 | Adjustable bending die |
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CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200529 |
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