CN220651722U - Aluminum alloy die-casting guide wheel for horizontal cantilever type single strander - Google Patents
Aluminum alloy die-casting guide wheel for horizontal cantilever type single strander Download PDFInfo
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- CN220651722U CN220651722U CN202321697583.9U CN202321697583U CN220651722U CN 220651722 U CN220651722 U CN 220651722U CN 202321697583 U CN202321697583 U CN 202321697583U CN 220651722 U CN220651722 U CN 220651722U
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- 238000004512 die casting Methods 0.000 title claims abstract description 110
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 62
- 238000009434 installation Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 abstract description 12
- 230000003044 adaptive effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 15
- 239000000956 alloy Substances 0.000 description 11
- 230000009467 reduction Effects 0.000 description 9
- 239000007787 solid Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses an aluminum alloy die-casting guide wheel for a horizontal cantilever type single strander, which relates to the technical field of cable equipment parts and components, and comprises a mounting part, a wheel body part and a functional part which are sequentially arranged from inside to outside along the radial direction; the functional part comprises a first inclined blocking arm obliquely arranged on the wheel body part, a second inclined blocking arm opposite to the first inclined blocking arm, and an arc-shaped bottom arranged between the first inclined blocking arm and the second inclined blocking arm. The utility model mainly solves the problem of how to provide an adaptive aluminum alloy die-casting guide wheel for a wire rod with a smaller wire diameter; the aluminum alloy die-casting guide wheel for the horizontal cantilever type single-stranded machine can be tightly attached to the bottom of the arc-shaped bottom when a cable with a smaller wire diameter is routed, so that the aluminum alloy die-casting guide wheel is not easy to slip, and can be tightly attached to the first inclined baffle arm and the second inclined baffle arm when a cable with a larger wire diameter is routed, so that the aluminum alloy die-casting guide wheel for the horizontal cantilever type single-stranded machine is not easy to slip.
Description
Technical Field
The utility model relates to the technical field of cable equipment parts, in particular to an aluminum alloy die-casting guide wheel for a horizontal cantilever type single strander.
Background
The aluminum alloy die-casting guide wheel is widely applied in industrial production, and various forms such as a wire guide wheel, a drawing wheel, a wire storage wheel, a meter counting wheel and the like are derived so as to be suitable for application occasions such as a horizontal cantilever type single strander, an annealing machine, a wire drawing machine, optical cable equipment, cable equipment and the like.
The wire guide wheel is one of the most commonly used aluminum alloy die-casting guide wheels, the publication number is CN212424968U, and the Chinese patent of the utility model is a flat groove guide wheel, which describes a typical wire guide wheel, wherein the wire guide part comprises an extension part extending along the axial direction of the wheel body and a blocking wall formed by bending the wire guide part towards the radial direction of the wheel body, so that a guided wire with a large wire diameter can contact the bottom of a wire groove, and can also contact the blocking wall, the friction force between the wire and the wire guide part is increased, the wire is not easy to slip, and the running of the wire is smoother.
However, the above-mentioned flat groove guide wheel still has certain drawbacks: when the wire guided by the flat groove guide wheel has a small wire diameter (a horizontal cantilever type single twisting machine is a typical device using a small wire diameter wire), the wire is easy to slip on the surface of the extension part and the blocking wall, and abrasion of the wire and the wire part is caused.
In summary, how to provide an adaptive aluminum alloy die-casting guide wheel for a wire with a smaller wire diameter is a problem to be solved.
Disclosure of Invention
The utility model aims to provide an aluminum alloy die-casting guide wheel for a horizontal cantilever type single strander, which can be adapted to wires with smaller wire diameters.
In order to achieve the above purpose, the present utility model provides the following technical solutions: an aluminum alloy die-casting guide wheel for a horizontal cantilever type single strander comprises a mounting part, a wheel body part and a functional part which are sequentially arranged from inside to outside along the radial direction; the functional part comprises a first inclined baffle arm obliquely arranged on the wheel body part, a second inclined baffle arm opposite to the first inclined baffle arm, and an arc-shaped bottom arranged between the first inclined baffle arm and the second inclined baffle arm.
In the above technical scheme, the wheel body part is provided with a plurality of lightening holes by taking the installation part as a symmetrical center.
In the above technical scheme, the mounting part comprises a mounting hole arranged at the center axis of the wheel body part.
In the technical scheme, the outer periphery of the mounting hole is pulled up to two sides along the axial direction to form the mounting ring.
In the above technical scheme, the included angle between the first inclined blocking arm and the second inclined blocking arm is alpha; α=65° to 75 °.
In the above technical scheme, the section of the arc-shaped bottom is arc-shaped, and the arc angle of the arc-shaped bottom is beta; beta=100° to 115 °.
A die casting die is used for the aluminum alloy die casting guide wheel for the horizontal cantilever type single twisting machine; the core-pulling mechanism comprises a front mold core, a rear mold core and two core-pulling blocks;
the die cavity of the front die core is sequentially provided with:
the first central cylinder is used for forming the mounting part of the aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine;
the first die-casting ring surface is used for forming a wheel body part of the aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine;
the first functional cavity is used for forming a functional part of the aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine;
the die cavity of the rear die core is sequentially provided with:
the second central cylinder is used for forming the mounting part of the aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine;
the second die-casting ring surface is used for forming a wheel body part of the aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine;
the second functional cavity is used for forming a functional part of the aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine;
the inner side of each loose core is provided with a die-casting semi-ring, and the two loose cores are opposite to each other and can be inserted into a cavity from between the front mold core and the rear mold core;
after the front mold core, the rear mold core and the loose core are combined, the first central cylinder and the second central cylinder are coaxial, no gap exists between the first central cylinder and the second central cylinder, the first die-casting ring surface and the second die-casting ring surface are coaxial, gaps exist between the first die-casting ring surface and the second die-casting ring surface and are parallel to each other, the first functional cavity and the second functional cavity are opposite to each other, the two die-casting semi-rings on the loose core are combined to form a die-casting ring, and the die-casting ring is positioned between the first functional cavity and the second functional cavity.
In the above technical scheme, the first functional cavity is a first annular inclined plane inclined to the solid side of the front mold core, and the second functional cavity is a second annular inclined plane inclined to the solid side of the rear mold core.
In the above technical scheme, the front mold core is arranged on the first die-casting ring surface, and is provided with a plurality of first material reduction cylinders for forming the weight reduction holes by taking the first central cylinder as a symmetrical center; the rear mold core is arranged on the second die-casting ring surface, and a plurality of second material reduction cylinders for forming the weight reduction holes are arranged on the second die-casting ring surface by taking the second central cylinder as a symmetrical center; after the front mold core, the rear mold core and the core pulling are combined, the first material reduction cylinder and the second material reduction cylinder are coaxial, and no gap exists between the first material reduction cylinder and the second material reduction cylinder.
Compared with the prior art, the utility model has the beneficial effects that: the aluminum alloy die-casting guide wheel for the horizontal cantilever type single-twisting machine is provided with the first inclined baffle arm, the second inclined baffle arm and the arc-shaped bottom part arranged between the first inclined baffle arm and the second inclined baffle arm, a cable with smaller wire diameter can be clung to the bottom part of the arc-shaped bottom part when being routed, the cable with larger wire diameter is not easy to slip, and the cable with larger wire diameter can be clung to the first inclined baffle arm and the second inclined baffle arm when being routed, and the cable with larger wire diameter is also not easy to slip, so that the aluminum alloy die-casting guide wheel for the horizontal cantilever type single-twisting machine has wider application range.
Drawings
Fig. 1 is a perspective view of an aluminum alloy die-casting guide wheel for a horizontal cantilever type single twisting machine in the utility model.
Fig. 2 is a structural view of an aluminum alloy die-casting guide wheel for a horizontal cantilever type single twisting machine in the utility model.
Fig. 3 is one of structural views of the die casting die in the present utility model.
Fig. 4 is a second structural view of the die casting die in the present utility model.
Fig. 5 is a cross-sectional view of a die casting die in the present utility model.
The reference numerals are: 1. a mounting portion; 11. a mounting hole; 12. a mounting ring; 2. a wheel body portion; 21. a lightening hole; 3. a functional section; 31. the first inclined baffle arm; 32. the second inclined baffle arm; 33. an arc-shaped bottom; 4. a front mold core; 41. a first central cylinder; 42. a first die-cast annulus; 43. a first annular ramp; 44. a first material reduction cylinder; 45. a flow passage; 46. a sprue gate; 5. a rear mold core; 51. a second central cylinder; 52. a second die-cast annulus; 53. a second annular ramp; 54. a second material reduction cylinder; 6. core pulling; 61. and (5) die casting the semi-ring.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The embodiment provides an aluminum alloy die-casting guide wheel for a horizontal cantilever type single strander, which can be applied to the horizontal cantilever type single strander for guiding the trend of a cable, and can also be applied to cable equipment such as an annealing machine, a wire drawing machine, optical cable equipment and cable equipment, and the like, and is also used for guiding the trend of the cable.
Referring to fig. 1 and 2, the aluminum alloy die-casting guide wheel for a horizontal cantilever type single twisting machine of the present embodiment includes a mounting portion 1, a wheel body portion 2 and a functional portion 3 sequentially disposed from inside to outside along a radial direction, wherein in practice, the mounting portion 1, the wheel body portion 2 and the functional portion 3 are all integrally die-cast aluminum alloy structural portions; the functional part 3 includes a first inclined stopper arm 31 disposed obliquely to the wheel body part 2, a second inclined stopper arm 32 opposed to the first inclined stopper arm 31, and an arc-shaped bottom 33 provided between the first inclined stopper arm 31 and the second inclined stopper arm 32.
Further, the mounting portion 1 includes a mounting hole 11 formed at a center axis of the wheel body portion 2, the mounting hole 11 being a circular hole coaxial with the wheel body portion 2 for the shaft or the bearing to penetrate therein.
Further, the outer periphery of the mounting hole 11 is pulled up to both sides in the axial direction to form a mounting ring 12; the mounting ring 12 is arranged to axially extend the mounting hole 11, so that the mounting hole 11 has a longer mounting length, the aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine can be matched with a multi-bearing or a bearing with a higher length, the axial fit length between the aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine and the rotating shaft can be increased, and the aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine is not easy to axially offset in the rotating process.
Further, the wheel body part 2 is provided with a plurality of weight reducing holes 21 by taking the mounting part 1 as a symmetrical center so as to reduce the dead weight of the aluminum alloy die-casting guide wheel for the horizontal cantilever type single strander, so that the aluminum alloy die-casting guide wheel for the horizontal cantilever type single strander can obtain better dynamic balance performance and save metal materials.
Further, the included angle between the first inclined blocking arm 31 and the second inclined blocking arm 32 is α, and α=65° to 75 °; with this arrangement, there is plenty of space between the first and second inclined stop arms 31 and 32 for the cable to pass through, and the cable is not easily separated from the functional portion 3.
Further, the cross section of the arc-shaped bottom 33 is arc-shaped, and the arc angle of the arc-shaped bottom 33 is β, β=100° to 115 °; with this arrangement, the arc-shaped bottom 33 can easily fit cables of various specifications.
The aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine of the embodiment is provided with a first inclined baffle arm 31, a second inclined baffle arm 32 and an arc-shaped bottom 33, wherein the first inclined baffle arm 31 and the second inclined baffle arm 32 are opposite to each other, the arc-shaped bottom 33 is arranged between the first inclined baffle arm 31 and the second inclined baffle arm 32, a cable with a smaller wire diameter can be clung to the bottom of the arc-shaped bottom 33 when being routed, the cable with a larger wire diameter is not easy to slip, and the cable with a larger wire diameter can be clung to the first inclined baffle arm 31 and the second inclined baffle arm 32 when being routed, so that the aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine of the embodiment is wider in application range.
The embodiment also provides a die casting die which is used for manufacturing the aluminum alloy die casting guide wheel for the horizontal cantilever type single twisting machine.
Referring to fig. 3-5, the die casting mold comprises a front mold core 4, a rear mold core 5 and two core-pulling cores 6; the front mold core 4, the rear mold core 5 and the core pulling 6 are made of hot work mold steel, such as steel with the model of H13; the front mold core 4 and the rear mold core 5 are respectively formed into a cavity by turning or laser processing.
The cavity of the front mold core 4 is sequentially provided with:
a first central cylinder 41 for forming the mounting portion 1 of the aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine;
a first die-casting ring surface 42 for forming the wheel body part 2 of the aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine;
the first functional cavity is used for forming a functional part 3 of an aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine;
the cavity of the rear mold core 5 is sequentially provided with:
a second central cylinder 51 for forming the mounting portion 1 of the aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine;
a second die-casting ring surface 52 for forming the wheel body part 2 of the aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine;
the second functional cavity is used for forming a functional part 3 of an aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine;
wherein the first die-casting ring surface 42 is a flat horizontal surface on the front die core 4, and the second die-casting ring surface 52 is a flat horizontal surface on the rear die core 5; the front mold core 4 is also provided with a pouring gate 46 and a runner 45, the pouring gate 46 is arranged on the side surface of the front mold core 4, and two ends of the runner 45 are respectively communicated with the pouring gate 46 and the first functional cavity; in addition, square grooves are respectively formed on two sides of the rear mold core 5, and the square grooves are communicated with the mold cavity for inserting the two core-pulling cores 6.
The inner side of each core-pulling piece 6 is provided with a die-casting semi-ring 61, the die-casting semi-ring 61 is formed by turning or laser processing, and the two core-pulling pieces 6 are opposite to each other and can be inserted into a cavity between the front mold core 4 and the rear mold core 5; that is, the two core-pulling cores 6 are respectively inserted into the square grooves on both sides of the rear mold core 5 until the two core-pulling cores 6 are abutted against each other, and at this time, the die-casting half ring 61 reaches the periphery of the cavity.
After the front mold core 4, the rear mold core 5 and the core pulling 6 are combined, the first central cylinder 41 and the second central cylinder 51 are coaxial, no gap exists between the first central cylinder 41 and the second central cylinder 51, the first die casting ring surface 42 and the second die casting ring surface 52 are coaxial, a gap exists between the first die casting ring surface 42 and the second die casting ring surface 52 and are parallel to each other, the first functional cavity and the second functional cavity are opposite to each other, the die casting semi-rings 61 on the two core pulling 6 are combined to form a die casting ring, and the die casting ring is positioned between the first functional cavity and the second functional cavity.
In this embodiment, the first functional cavity is a first annular inclined plane 43 inclined towards the solid side of the front mold core 4, and the first annular inclined plane 43 is a flat inclined plane for forming the first inclined baffle arm 31 of the aluminum alloy die-casting guide wheel for the horizontal cantilever type single twisting machine; the second functional cavity is a second annular inclined plane 53 inclined towards the solid side of the rear mold core 5, and the second annular inclined plane 53 is also a flat inclined plane and is used for forming a second inclined baffle arm 32 of an aluminum alloy die-casting guide wheel for the horizontal cantilever type single-strand machine; after the front mold core 4, the rear mold core 5 and the core pulling 6 are combined, the first annular inclined surface 43 and the second annular inclined surface 53 are symmetrical with the combined surface of the front mold core 4 and the rear mold core 5 as a center.
Further, the front mold core 4 is provided with a plurality of first material reducing cylinders 44 for forming the weight reducing holes 21 on the first die casting ring surface 42 by taking the first central cylinder 41 as a symmetry center; the rear mould core 5 is provided with a plurality of second material reducing cylinders 54 for forming the weight reducing holes 21 on a second die casting ring surface 52 by taking a second central cylinder 51 as a symmetrical center; after the front mold core 4, the rear mold core 5 and the core pulling 6 are combined, the first material reducing cylinder 44 and the second material reducing cylinder 54 are coaxial, and no gap exists between the first material reducing cylinder 44 and the second material reducing cylinder 54.
The die casting die of the embodiment comprises the following steps when manufacturing the aluminum alloy die casting guide wheel for the horizontal cantilever type single twisting machine:
s1, combining a front mold core 4, a rear mold core 5 and two core pulling cores 6 in a die casting mold;
in this step, the front mold core 4, the rear mold core 5 and the two core-pulling cores 6 are respectively mounted on the corresponding mold frames, then the mold frames are mounted on the die casting machine, and during die casting, the die casting machine combines the front mold core 4, the rear mold core 5 and the two core-pulling cores 6, so that the cavities of the front mold core 4 and the rear mold core 5 are combined, and the two core-pulling cores 6 are respectively inserted from two sides until the die casting semi-ring 61 reaches the cavities.
S2, pressurizing the alloy material in a molten state and injecting the alloy material into a cavity of the die-casting die.
Wherein the alloy material may be one of aluminum alloy, steel or cast iron, the alloy material is heated to a molten state, then introduced into a die casting machine, the molten alloy material is pressurized by the die casting machine, and then injected into the die casting mold from the pouring opening 46 of the front mold core 4 until the alloy material reaches the cavity.
Alloy material cannot enter the first and second center cylinders 41 and 51 to shape the mounting hole 11; alloy material enters the cavity between the first die-cast ring surface 42 and the second die-cast ring surface 52 to shape the wheel body part 2 and level both sides of the wheel body part 2; alloy material enters the cavities between the first annular chamfer 43, the second annular chamfer 53 and the die casting ring to form the functional portion 3; alloy material cannot enter the first and second reduction cylinders 44, 54 to form the lightening holes 21.
S3, after the alloy material is cooled, opening a front mold core 4, a rear mold core 5 and two core pulling cores 6 in the die-casting mold, and demolding to obtain the aluminum alloy die-casting guide wheel blank for the horizontal cantilever type single-strand machine.
In the step, the die casting machine separates the front die core 4 from the rear die core 5, simultaneously separates two loose cores 6 by utilizing an inclined guide pillar, opens a cavity, ejects an aluminum alloy die casting guide wheel blank for the horizontal cantilever type single strander by using a thimble, and demolding the aluminum alloy die casting guide wheel blank for the horizontal cantilever type single strander.
S4, processing the aluminum alloy die-casting guide wheel blank for the horizontal cantilever type single strander to obtain the aluminum alloy die-casting guide wheel for the horizontal cantilever type single strander.
Specifically, step S4 includes:
s4.1, rough machining: the die casting water gap, the flow channel 45 and the redundant leftover materials connected with the aluminum alloy die casting guide wheel blank body for the horizontal cantilever type single strander are removed by punching the aluminum alloy die casting guide wheel blank body for the horizontal cantilever type single strander.
S4.2, finishing: clamping the aluminum alloy die-casting guide wheel blank for the horizontal cantilever type single twisting machine on a CNC lathe to finish the surface of the aluminum alloy die-casting guide wheel blank for the horizontal cantilever type single twisting machine;
s4.3, surface treatment: and carrying out black anode treatment on the surface of the blank of the aluminum alloy die-casting guide wheel for the horizontal cantilever type single strander to obtain the aluminum alloy die-casting guide wheel for the horizontal cantilever type single strander.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The aluminum alloy die-casting guide wheel for the horizontal cantilever type single strander is characterized by comprising a mounting part, a wheel body part and a functional part which are sequentially arranged from inside to outside along the radial direction;
the functional part comprises a first inclined baffle arm obliquely arranged on the wheel body part, a second inclined baffle arm opposite to the first inclined baffle arm, and an arc-shaped bottom arranged between the first inclined baffle arm and the second inclined baffle arm.
2. The aluminum alloy die-casting guide wheel for a horizontal cantilever type single twisting machine according to claim 1, wherein: the wheel body part takes the installation part as a symmetrical center and is provided with a plurality of lightening holes.
3. The aluminum alloy die-casting guide wheel for a horizontal cantilever type single twisting machine according to claim 1, wherein: the mounting portion includes a mounting hole formed in a central axis of the wheel body portion.
4. The aluminum alloy die-casting guide wheel for a horizontal cantilever type single twisting machine according to claim 3, wherein: the outer periphery of the mounting hole is pulled up to two sides along the axial direction to form a mounting ring.
5. The aluminum alloy die-casting guide wheel for a horizontal cantilever type single twisting machine according to claim 1, wherein: the included angle between the first inclined baffle arm and the second inclined baffle arm is alpha;
α=65° to 75 °.
6. The aluminum alloy die-casting guide wheel for a horizontal cantilever type single twisting machine according to claim 1, wherein: the section of the arc-shaped bottom is arc-shaped, and the arc angle of the arc-shaped bottom is beta;
beta=100° to 115 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321697583.9U CN220651722U (en) | 2023-06-30 | 2023-06-30 | Aluminum alloy die-casting guide wheel for horizontal cantilever type single strander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321697583.9U CN220651722U (en) | 2023-06-30 | 2023-06-30 | Aluminum alloy die-casting guide wheel for horizontal cantilever type single strander |
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| Publication Number | Publication Date |
|---|---|
| CN220651722U true CN220651722U (en) | 2024-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321697583.9U Active CN220651722U (en) | 2023-06-30 | 2023-06-30 | Aluminum alloy die-casting guide wheel for horizontal cantilever type single strander |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220651722U (en) |
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2023
- 2023-06-30 CN CN202321697583.9U patent/CN220651722U/en active Active
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