CN117300126A - Droplet generation mechanism for jet deposition forming - Google Patents
Droplet generation mechanism for jet deposition forming Download PDFInfo
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- CN117300126A CN117300126A CN202311276113.XA CN202311276113A CN117300126A CN 117300126 A CN117300126 A CN 117300126A CN 202311276113 A CN202311276113 A CN 202311276113A CN 117300126 A CN117300126 A CN 117300126A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 26
- 238000001540 jet deposition Methods 0.000 title description 4
- 239000007788 liquid Substances 0.000 claims abstract description 97
- 229910052751 metal Inorganic materials 0.000 claims abstract description 43
- 239000002184 metal Substances 0.000 claims abstract description 43
- 239000000155 melt Substances 0.000 claims abstract description 18
- 238000009718 spray deposition Methods 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000007493 shaping process Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010079 rubber tapping Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000000161 steel melt Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/115—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by spraying molten metal, i.e. spray sintering, spray casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/003—Apparatus, e.g. furnaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F5/106—Tube or ring forms
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The molten drop generating mechanism for spray deposition forming includes one molten liquid cylinder in the center of the centrifugal disc, one liquid outlet hole in the wall of the molten liquid cylinder, and one piston rod inside the molten liquid cylinder; the piston rod can slide up and down and is used for plugging or opening the liquid outlet hole, so that the metal melt in the melt cylinder is thrown out of the liquid outlet hole at intervals and quantitatively to form a molten drop. The rotating molten metal cylinder can enable the molten metal to generate centrifugal force, the quantity and the volume of the molten metal thrown out of the liquid outlet hole can be controlled by adjusting the up-and-down sliding frequency of the piston rod, and then molten drops with nearly identical diameters are obtained. The molten drops with similar diameters have similar impact kinetic energy and cooling speed, and can form a tissue structure with fine grains and high density. In addition, the invention also discloses the relation between the radius of the liquid outlet hole, the up-and-down movement frequency of the piston rod and related parameters, so that the radius of the liquid outlet hole and the up-and-down movement frequency of the piston rod can be reversely calculated according to the ball radius of the molten drop, and a theoretical basis is provided for controlling the size of the molten drop.
Description
Technical Field
The invention relates to the technical field of spray deposition forming, in particular to a droplet generation mechanism for spray deposition forming.
Background
The principle of spray deposition is that under the protection of inert gas, molten metal is broken into tiny metal droplets, then the fine metal droplets are continuously sprayed onto a metal substrate under the action of high-pressure gas or centrifugal force to deposit a semi-solidified deposition layer, the deposition layer is solidified into a prefabricated blank by means of heat conduction of the metal substrate, and the prefabricated blank is subjected to hot extrusion or hot forging to form a high-density metal ring body. The spray deposition process has the advantages that annular parts with small component segregation degree, fine and uniform structure and larger size can be prepared.
The invention patent with the publication number of CN109877299B discloses a casting device and a centrifugal disk for centrifugal injection molding, and the casting device in the patent realizes the preparation of a metal hollow ingot by using an injection deposition principle. However, in the application, the prepared metal hollow ingot is not ideal, and mainly has the characteristics of insufficient fine grain structure and insufficient high density. It was found by analysis that the droplets thrown from the centrifuge disk were of small and uneven diameter. The molten drops with the diameter smaller than 1mm have short flight distance and small impact kinetic energy, and are insufficient to break up the crystal branches inside the molten drops through impact. The cooling rate of droplets larger than 3mm is not satisfactory and they are scattered around after striking the substrate. Only the molten drops with the diameter of 1-3mm can break up the crystal branches inside the molten drops by impact, and the molten drops are not scattered and refracted everywhere. The structure and rotational speed of the centrifugal disk are thereafter improved several times, but the effect is not ideal. Therefore, it is necessary to consider the manner of generating the droplets from another angle.
Disclosure of Invention
In order to overcome the defects in the background technology, the invention discloses a droplet generation mechanism for jet deposition forming, which aims at:
in order to achieve the aim of the invention, the invention adopts the following technical scheme:
the molten drop generating mechanism for spray deposition forming includes one molten liquid cylinder in the center of the centrifugal disc, one liquid outlet hole in the wall of the molten liquid cylinder, and one piston rod inside the molten liquid cylinder; the piston rod can slide up and down and is used for plugging or opening the liquid outlet hole, so that the metal melt in the melt cylinder is thrown out of the liquid outlet hole at intervals and quantitatively to form a molten drop.
After implementing the technical scheme, the beneficial effects that it produced are: the rotating molten metal cylinder can enable the molten metal to generate centrifugal force, the quantity and the volume of the molten metal thrown out of the liquid outlet hole can be controlled by adjusting the up-and-down sliding frequency of the piston rod, and then molten drops with nearly identical diameters are obtained. The molten drops with similar diameters have similar impact kinetic energy and cooling speed, and can prepare the jet deposition parts with fine grains and high density.
Further improvement technical scheme, let the radius of liquid hole be r, let the frequency of piston rod up-and-down motion be f, then have:
r＝K*Sr，
wherein R is the radius of the molten metal cylinder, ρ is the density of the molten metal, sr is the spherical radius of the molten drop, ω is the rotating speed of the centrifugal disk, σ is the surface tension coefficient of the molten metal, and C is more than or equal to 1.
After implementing the technical scheme, the beneficial effects that it produced are: the formula reveals the relation between the radius of the liquid outlet hole, the up-and-down movement frequency of the piston rod and related parameters, and the radius of the liquid outlet hole and the up-and-down movement frequency of the piston rod can be reversely calculated according to the spherical radius of the molten drop to be obtained through the formula, so that a theoretical basis is provided for controlling the size of the molten drop.
Further improving the technical scheme, be provided with the notes liquid pipe in the piston rod, annotate the liquid pipe and be used for pouring into the molten metal in the molten metal section of thick bamboo.
After implementing the technical scheme, the beneficial effects that it produced are: can ensure that a certain amount of molten metal is always reserved in the molten metal cylinder.
Due to the adoption of the technical scheme, the molten drop generating mechanism further comprises a crank block mechanism, and the crank block mechanism is connected with the piston rod and used for driving the piston rod to slide up and down.
After implementing the technical scheme, the beneficial effects that it produced are: the crank block mechanism is a common reciprocating linear motion mechanism and can drive the piston rod to slide up and down.
Due to the adoption of the technical scheme, the upper part of the piston rod is provided with the transverse chute, the transverse chute is internally provided with the eccentric shaft in a matching way, and the eccentric shaft is connected with the speed regulating motor; when the speed regulating motor rotates, the piston rod is driven to slide up and down through the cooperation of the eccentric shaft and the sliding groove.
After implementing the technical scheme, the beneficial effects that it produced are: the piston rod slides up and down once every turn of the speed regulating motor, and the frequency of the up-and-down movement of the piston rod can be regulated by changing the rotating speed of the speed regulating motor.
The wall of the melt cylinder is provided with a through hole, a liquid outlet nozzle is detachably arranged in the through hole, and an inner hole in the liquid outlet nozzle is a liquid outlet hole.
After implementing the technical scheme, the beneficial effects that it produced are: the radius of the liquid outlet hole can be quickly adjusted by replacing the liquid outlet nozzle.
Drawings
Fig. 1 is a schematic perspective view showing the structure of the droplet generation mechanism in embodiment 1.
Fig. 2 is a schematic cross-sectional view of fig. 1.
Fig. 3 shows a schematic view of the structure of the piston rod when it is up.
Fig. 4 shows a schematic view of the structure of the piston rod when it is lowered.
FIG. 5 is a schematic view showing the state where the melt enters the tapping orifice.
FIG. 6 shows a schematic view of the melt before it is thrown out of the tapping orifice.
Fig. 7 is a schematic perspective view showing the structure of the droplet generation mechanism in embodiment 2.
Fig. 8 is a schematic cross-sectional view of fig. 7.
Fig. 9 is a schematic view showing the structure of a melt cartridge in example 3.
In the figure:
1. a tray body;
2. a melt cylinder; 21. a liquid outlet hole; 22. a liquid outlet nozzle;
3. a piston rod;
4. a liquid injection pipe;
5. an eccentric shaft;
6. a speed regulating motor;
7. and (5) dripping.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention. It should be noted that, in the description of the present invention, terms such as "front", "rear", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present invention. It should also be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Example 1:
as shown in fig. 1, a droplet generation mechanism for spray deposition molding includes a molten metal drum provided in the center of a centrifugal disk, and the structure and operation thereof will be described in detail below.
Refer to fig. 2. The centrifugal disk comprises a circular disk body 1, the disk body 1 being rotatable in a horizontal plane along its axis. A molten metal cylinder 2 is fixed in the center of the tray body 1, the molten metal cylinder 2 is made of high-temperature-resistant heat-insulating materials, and molten metal is contained in the molten metal cylinder 2.
Ten liquid outlet holes 21 are formed in the wall of the melt cylinder 2 in the circumferential direction. A piston rod 3 is arranged in the melt cylinder 2, and the piston rod 3 is made of a high-temperature-resistant nonmetallic material. Under the drive of external force, the piston rod 3 slides up and down in the melt cylinder 2, and at this time, the piston part of the piston rod 3 can block or open the liquid outlet 21.
Refer to fig. 3. When in operation, the tray body 1 rotates, the piston rod 3 moves upwards at the moment, and the liquid outlet 21 is in an open state. Under the action of centrifugal force, the molten liquid in the molten liquid cylinder 2 flows to the cylinder wall, and the liquid level of the molten liquid at the cylinder wall part is higher than the liquid outlet hole 21. Thus, a part of the melt can enter the tapping orifice 21.
Refer to fig. 4. The piston rod 3 moves downwards to block the liquid outlet hole 21, and at the moment, the molten liquid in the molten liquid cylinder 2 cannot enter the liquid outlet hole 21, and the molten liquid entering the liquid outlet hole 21 is thrown outwards to form molten drops. Thus, by adjusting the frequency of the vertical sliding of the piston rod 3, the quantity and the volume of the molten metal thrown out from the liquid outlet hole 21 can be controlled, and then the molten metal drops with nearly uniform diameters can be obtained.
The size of the molten drops is related to parameters such as the rotating speed of the centrifugal disk, the aperture of the liquid outlet hole 21, the radius of the molten liquid cylinder 2, the up-and-down movement frequency of the piston rod 3 and the like, wherein the aperture of the liquid outlet hole 21 and the up-and-down movement frequency of the piston rod 3 play a vital role in the generation of the molten drops and the size of the molten drops. Therefore, to obtain a droplet having a diameter in the region of 1-3mm, the aperture of the liquid outlet hole 21 and the frequency of the up-and-down movement of the piston rod 3 must be determined.
The pore diameter of the liquid outlet hole and the frequency of the up-and-down movement of the piston rod are deduced as follows:
let the radius of the liquid outlet be r, let the frequency of the up-and-down motion of the piston rod be f. The conditions are known: r is the radius of the melt cylinder, sr is the spherical radius of the molten drop, and omega is the rotating speed of the centrifugal disk.
Let the ratio of the radius of the liquid outlet hole r to the spherical radius of the molten drop be K, then there are:
r＝K*Sr (1)
refer to fig. 5. The molten liquid entering the liquid outlet hole is regarded as a cylinder, the process of entering the molten liquid into the liquid outlet hole is regarded as uniform acceleration linear motion with zero initial speed, and then the following steps are provided:
in the formula (2), L is the length of the molten metal entering the liquid outlet hole during the opening of the liquid outlet hole.
Since the cylindrical molten liquid and the spherical molten drop are equal in volume, there are:
refer to fig. 6. In the process of throwing out the liquid outlet hole 21, the molten drop 7 can generate surface tension F at the outlet part of the liquid outlet hole 21 t The following steps are:
F r ＝C*F t (4)
in the formula (4), F r The centrifugal force applied to the molten drops is C, which is the coefficient of the molten drops to separate from the liquid outlet holes, and C is more than or equal to 1. If F<f, indicating that the molten drop cannot be separated from the liquid outlet hole.
F t ＝2πrσ (5)
In the formula (5), σ is the surface tension coefficient of the molten metal.
If the radius of the liquid outlet hole is far larger than the spherical radius of the droplet, the mass of the droplet is large, and the droplet is subjected to centrifugal force F r Is also far greater than the surface tension F t Surface tension F at this time t And may even be negligible. But the liquid outlet hole is too largeMore than two molten drops can be formed in the process of throwing out the liquid outlet hole, and the design is not in line with the original purpose. Therefore, the radius of the liquid outlet hole can only be close to the spherical radius of the molten drop.
Under the same condition, the smaller the radius of the liquid outlet hole is, the larger the influence of the surface tension on the molten drops is, and the molten drops are not easy to throw out of the liquid outlet hole. Since the spherical radius of the droplet is only 0.5-1.5mm, the effect of the surface tension on the droplet is fully considered.
Centrifugal force F to which the droplets are subjected r The method comprises the following steps:
F r ＝mω 2 R＝ρπr 2 Lω 2 R (6)
in the formula (6), m is the mass of the molten drop, and ρ is the density of the molten metal. Because the wall of the melt cylinder is very thin, the total length of the liquid outlet hole is negligible, so that the radius of the melt cylinder can be used as the length of the molten drop to the circle center.
Simultaneous (1-6), then there are:
the formula reveals the relation between the radius of the liquid outlet hole, the up-and-down movement frequency of the piston rod and related parameters, and the radius of the liquid outlet hole and the up-and-down movement frequency of the piston rod can be reversely calculated according to the spherical radius of the molten drop to be obtained through the formula, so that a theoretical basis is provided for controlling the size of the molten drop.
For example, the spherical radius Sr of the aluminum alloy molten drop to be obtained is 1mm, the radius R of the molten metal cylinder is 10mm, the rotational speed ω of the centrifugal disk is 20 revolutions per second, and the density ρ of the aluminum alloy molten liquid is 2.63g/cm 3 The surface tension coefficient sigma of the aluminum alloy melt is 0.85N/m, c=1.2, K can be obtained to be about 0.27, and then the radius r of the liquid outlet hole is about 0.27mm, and the frequency f of the up-and-down movement of the piston rod is about 33 times per second.
As another example, the spherical radius Sr of the molten alloy steel drop to be obtained is 1mm, the radius R of the molten alloy cylinder is 10mm, the rotational speed omega of the centrifugal disk is 10 per second, and the density ρ of the molten alloy steel is 7.8g/cm 3 The surface tension coefficient sigma of the alloy steel melt is 1.25N/m, and taking C=1.2, K can be obtained to be about 0.16, and then the radius r of the liquid outlet hole is obtained to be about 0.16mm, and the frequency f of the up-and-down movement of the piston rod is about 14 times per second.
Example 2:
reference is made to fig. 7-8. In this embodiment, a liquid injection pipe 4 is disposed in the piston rod 3, a crucible is connected above the liquid injection pipe 4, and the liquid injection pipe 4 is used for injecting molten metal into the molten metal cylinder 2, so as to ensure that a certain amount of molten metal is always reserved in the molten metal cylinder 2.
The liquid injection pipe 4 is provided with an external spline, the upper part of the piston rod 3 is provided with an internal spline, and the piston rod 3 can slide up and down along the liquid injection pipe 4. The external spline is matched with the internal spline, so that the piston rod 3 can be prevented from rotating relative to the liquid injection pipe 4.
The upper part of the piston rod 3 is provided with a transverse chute, an eccentric shaft 5 is arranged in the transverse chute in a matching way, and the eccentric shaft 5 is connected with a speed regulating motor 6. When the speed regulating motor 6 rotates, the piston rod 3 is driven to slide up and down through the cooperation of the eccentric shaft 5 and the sliding groove. The frequency of the up-and-down movement of the piston rod 3 depends on the rotational speed of the speed regulating motor 6, and the frequency of the up-and-down movement of the piston rod 3 can also be adjusted by changing the rotational speed of the speed regulating motor 6.
In addition to the above-described structure, the piston rod 3 can be driven to make a reciprocating rectilinear motion mechanism such as a crank block mechanism, a cam block mechanism, a cylinder, or the like.
Example 3:
the liquid outlet hole 21 has a small radius and is easy to be blocked. The material of the melt is different, and the aperture of the tapping orifice 21 is also changed.
Refer to fig. 9. In order to facilitate replacement, a through hole is arranged on the wall of the melt cylinder 2, a liquid outlet nozzle 22 is detachably arranged in the through hole, and an inner hole in the liquid outlet nozzle 22 is a liquid outlet hole 21. In this way, the liquid outlet nozzle 22 can be replaced quickly, and the aperture of the liquid outlet hole 21 can be adjusted quickly.
The parts not described in detail are prior art. Although embodiments of the present invention 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 spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (6)
1. A droplet generation mechanism for spray deposition shaping is characterized in that: the centrifugal disc comprises a molten liquid cylinder arranged in the center of a centrifugal disc, wherein a liquid outlet hole is formed in the wall of the molten liquid cylinder, and a piston rod is arranged in the molten liquid cylinder; the piston rod can slide up and down and is used for plugging or opening the liquid outlet hole, so that the metal melt in the melt cylinder is thrown out of the liquid outlet hole at intervals and quantitatively to form a molten drop.
2. The droplet generation mechanism for spray deposition modeling of claim 1, wherein: let the radius of the liquid outlet be r, let the frequency of the up-and-down motion of the piston rod be f, then there are:
r＝K*Sr，
wherein R is the radius of the molten metal cylinder, ρ is the density of the molten metal, sr is the spherical radius of the molten drop, ω is the rotating speed of the centrifugal disk, σ is the surface tension coefficient of the molten metal, and C is more than or equal to 1.
3. The droplet generation mechanism for spray deposition modeling of claim 1, wherein: the piston rod is internally provided with a liquid injection pipe which is used for injecting molten metal into the molten metal cylinder.
4. The droplet generation mechanism for spray deposition modeling of claim 1, wherein: the molten drop generating mechanism further comprises a crank block mechanism, and the crank block mechanism is connected with the piston rod and used for driving the piston rod to slide up and down.
5. The droplet generation mechanism for spray deposition modeling of claim 1, wherein: the upper part of the piston rod is provided with a transverse chute, an eccentric shaft is mounted in the transverse chute in a matched manner, and the eccentric shaft is connected with a speed regulating motor; when the speed regulating motor rotates, the piston rod is driven to slide up and down through the cooperation of the eccentric shaft and the sliding groove.
6. The droplet generation mechanism for spray deposition modeling of claim 1, wherein: the wall of the melt cylinder is provided with a through hole, a liquid outlet nozzle is detachably arranged in the through hole, and a channel in the liquid outlet nozzle is a liquid outlet hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311276113.XA CN117300126A (en) | 2023-09-29 | 2023-09-29 | Droplet generation mechanism for jet deposition forming |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311276113.XA CN117300126A (en) | 2023-09-29 | 2023-09-29 | Droplet generation mechanism for jet deposition forming |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117698029A (en) * | 2024-02-04 | 2024-03-15 | 福建省诚兴体育用品有限公司 | Outsole forming machine |
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2023
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117698029A (en) * | 2024-02-04 | 2024-03-15 | 福建省诚兴体育用品有限公司 | Outsole forming machine |
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