A hollow earring assembly device

By designing a hollow ear needle assembly device and automatically assembling a hollow ear needle using a feeding device and a stamping forming device, the problems of high assembly difficulty and high cost in the prior art are solved, and an efficient and automated production process is achieved.

CN116351936BActive Publication Date: 2025-05-27HAIFENG LONGXING MASCH TECH CO LTD
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Patent Information

Application Number
CN202310143740.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-02-20
Publication Date
2025-05-27
Estimated Expiration
2043-02-20

AI Technical Summary

Technical Problem

The prior art is difficult to automatically assemble hollow ear needles, resulting in high production costs and high fixation difficulties, especially in modern automated production environments.

Method used

A hollow ear needle assembly device is designed, including a workbench, a feeding device and a stamping forming device. The feeding device transports the ear tubes one by one into the stamping forming device through the ear tube conveying device and the device to be taken. The stamping forming device uses the clamping device and the deformation stamping head to fix the metal sheet and the ear tube together.

Benefits of technology

It realizes an automated assembly process without manual participation, improves production efficiency and fixed stability, reduces production costs, and is suitable for modern automated production environments.

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Abstract

The present invention relates to the field of processing of ear acupuncture ornaments, and provides a hollow ear acupuncture assembly device, which includes a workbench, a feeding device and a stamping and forming device. There is a stamping groove on the platform, and the groove wall of the stamping groove is in a corrugated shape with unevenness. The feeding device includes an ear acupuncture tube conveying device and an ear acupuncture tube to-be-taken device. The ear acupuncture tube conveying device is used to convey the ear acupuncture tube to the ear acupuncture to-be-taken device; the stamping and forming device includes a driving device and a clamping device. The clamping device makes horizontal displacement and lifting movement driven by the driving device. There is a stamping head on the clamping device. The stamping head is clamped and matched with the upper part of the ear acupuncture tube. The shape after the stamping head is closed is the same as the shape of the groove wall of the stamping tooth groove. The clamping device is driven by the lifting device to perform stamping cooperation with the stamping tooth groove. During stamping, since the metal sheet deforms due to the unevenness of the groove wall of the stamping tooth groove, the metal sheet is clamped with the metal tube and thus relatively fixed. The entire production process does not require manual participation and operates efficiently, so as to perform automated continuous operation.
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Description

Technical Field

[0001] The present invention relates to the field of earring processing, and particularly to a hollow earring assembly device. Background Art

[0002] With the continuous improvement of people's demand for living materials, the types of jewelry are increasing, such as crown ornaments, earrings, jewelry, and necklaces. With the development of these ornaments, they need to meet more and more people's needs. For earrings, in addition to color and style, earrings are also becoming lighter. Therefore, hollow earring tubes have emerged. However, compared with traditional solid earring tubes, the hollow earring tubes have a thinner thickness and are not suitable for excessive shape modification, such as setting threads or buckles on the earring tubes, which will greatly increase the production cost. In order to control the production cost of hollow earring tubes, manufacturers generally produce straight earring tubes without excessive deformation modification, which increases the difficulty of fixing the metal ornament to the earring. Especially in the modern production environment that increasingly requires automated production, there is currently a lack of a device that can automatically assemble hollow tube earrings on the market. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, one of the purposes of the present invention is to provide a hollow earring assembly device to solve the above-mentioned technical problems.

[0004] One of the purposes of the present invention is achieved by the following technical solution: A hollow earring assembly device, the earring includes an earring tube and a metal sheet, including

[0005] A workbench, on which a stamping groove for stamping is provided, and the groove wall of the stamping groove is uneven and wavy. The metal sheet to be processed is placed in the stamping groove, and an earring hole for the earring tube to extend into is provided in the middle of the stamping groove;

[0006] A feeding device, which includes an earring tube conveying device and an earring tube waiting-to-be-taken device. The earring tube conveying device is used to convey the earrings one by one to the earring waiting-to-be-taken device;

[0007] A stamping and forming device, the stamping and forming device includes a driving device and a clamping device. The clamping device performs horizontal displacement movement and lifting movement under the drive of the driving device. A deformation stamping head is provided on the clamping device. The deformation stamping head is clamped and cooperated with the upper part of the earring tube. The shape of the deformation stamping head after closing is the same as the shape of the groove wall of the stamping tooth groove. The clamping device performs stamping cooperation with the stamping tooth groove under the drive of the driving device.

[0008] Further, the stamping groove is a circular groove, and a plurality of petal-shaped grooves are arranged in an array on the groove wall of the stamping groove.

[0009] Furthermore, the ear acupuncture needle tube conveying device includes a vibrating disk mechanism and a discharging pipeline. The discharging pipeline is communicated with the outlet end of the vibrating disk mechanism, and the discharging pipeline is provided with a discharging channel through which the ear acupuncture needles pass horizontally in sequence.

[0010] Furthermore, the ear acupuncture needle waiting-to-be-taken device includes a waiting-to-be-taken table and a waiting-to-be-taken driving device. The waiting-to-be-taken table is provided with a first groove for adjusting the angle of the ear acupuncture needle. The first groove provides a moving space and a rotation fulcrum for the ear acupuncture needle tube to change from a horizontal state to a vertical state.

[0011] Furthermore, one end of the ear acupuncture needle is provided with an annular groove.

[0012] Furthermore, the ear acupuncture needle tube conveying device further includes a detection mechanism. The detection mechanism is arranged above the vibrating disk mechanism and is used for detecting that the end with the annular groove is in the front when the ear acupuncture needle discharges from the outlet end of the vibrating disk mechanism.

[0013] Furthermore, it further includes a metal sheet processing device. The metal sheet processing device includes a metal conveying device and a metal stamping device. The metal conveying device includes a conveyor belt and a metal strip. The metal strip moves horizontally above the workbench driven by the conveyor belt. The metal stamping device is arranged above the metal strip, and the metal stamping device performs a stamping operation on the metal strip to form a required circular metal sheet.

[0014] Furthermore, the metal stamping device is arranged on the driving device. The metal stamping device is arranged on one side of the clamping device, and a forming stamping head is arranged at the lower end of the metal stamping device.

[0015] Furthermore, the clamping device includes a first lifting drive, a first support frame, a clamping support frame, a clamping drive, and two clamping members. The first support frame is arranged on the driving device. The first lifting drive is arranged on the first support frame and is connected to the clamping support frame. The clamping drive is arranged on the clamping support frame and is connected to the two clamping members. The end of the clamping member is provided with the deformation stamping head.

[0016] Furthermore, the driving device includes a left-right displacement device and a front-back displacement device.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] In the present invention, single ear needle tubes are conveyed one by one through a feeding device, the ear needle tubes are clamped by a clamping device, and the clamping device is moved above the stamping groove of a metal sheet by a driving device to stamp the metal sheet. During stamping, due to the deformation of the metal sheet caused by the uneven groove wall of the stamping groove, the metal sheet is engaged with the metal tube and relatively fixed. The entire production process does not require manual participation and operates efficiently, enabling automated continuous operation. If this technical solution can be popularized and applied, it will have great economic value and social benefits and is highly competitive in the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a schematic diagram of the feeding device structure of the present invention;

[0021] Figure 3 is Figure 2 an enlarged schematic diagram at position A in

[0022] Figure 4 is a schematic diagram of the overall structure of the stamping and forming device of the present invention;

[0023] Figure 5 is a schematic diagram of the clamping device of the present invention;

[0024] Figure 6 is Figure 5 an enlarged schematic diagram at position B in

[0025] Figure 7 is a schematic diagram of the clamping device of the present invention in clamping cooperation with the ear needle tube.

[0026] In the figure:

[0027] 1. Ear needle tube; 11. Annular groove;

[0028] 2. Workbench; 21. Stamping groove;

[0029] 3. Feeding device; 31. Ear needle tube conveying device; 311. Vibrating plate mechanism; 312. Discharge pipeline; 32. Ear needle tube waiting-to-be-taken device; 321. Waiting-to-be-taken table; 3211. First groove; 322. Waiting-to-be-taken driving device; 33. Detection mechanism;

[0030] 4. Stamping and forming device; 41. Stamping driving device; 411. Left and right displacement device; 412. Front and back displacement device; 42. Clamping device; 421. Deformation stamping head; 422. First lifting drive; 423. First support frame; 424. Clamping support frame; 425. Clamping drive; 426. Clamping member;

[0031] 5. Metal sheet processing device; 51. Metal conveying device; 511. Conveyor belt; 512. Metal strip; 52. Metal stamping device; 521. Forming stamping head; 522. Second lifting drive; 523. Stamped part. Detailed implementation manner

[0032] Next, in combination with the attached Figure 1 to the attached Figure 7 and the detailed implementation manner, the present invention will be further described. It should be noted that, on the premise of no conflict, the following described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0033] As Figures 1 - 7 shown, the present invention provides a hollow earring assembly device. The earring includes an earring tube 1 and a metal sheet. Through this device, the earring tube 1 and the metal sheet are assembled and fixed. Specifically, this device includes a workbench 2, a feeding device 3, and a stamping and forming device 4.

[0034] Specifically, as Figure 1As shown in the figure, the above-mentioned devices are all fixed on a box body. The working body is located in the middle of the whole device. The workbench 2 is a platform with an inverted T-shaped cross-section. On the plane convex part in the middle of the workbench 2, there is a stamping groove 21 for stamping forming. The shape of the stamping groove 21 can be designed according to the required metal sheet. In this embodiment, for example, an umbrella-shaped metal sheet needs to be assembled, so the stamping groove 21 is opened in a circular shape. There are a plurality of petal-shaped grooves arranged in an array on the groove wall of the stamping groove 21. In other embodiments, the stamping groove 21 can be opened in the shape of a pentagram, a rectangle, etc. However, an ear needle tube 1 hole extending downward is provided in the middle of the stamping groove 21 to facilitate the ear needle tube 1 to extend in during stamping. The groove wall of the stamping groove 21 is in an uneven corrugated shape. Before stamping, the metal sheet to be processed is placed in the stamping groove 21. At this time, the metal sheet to be processed is generally an unprocessed metal thin sheet with a thickness of 0.03 - 0.1 mm. The metal sheet does not fit the groove wall of the stamping groove 21. The feeding device 3 includes an ear needle tube conveying device 31 and an ear needle tube waiting-to-be-taken device 32. The ear needle tube conveying device 31 is used to convey ear needles one by one to the ear needle waiting-to-be-taken device. The ear needle tube 1 on the ear needle waiting-to-be-taken device waits for the stamping forming device 4 to pick up the material. The stamping forming device 4 includes a stamping driving device 41 and a clamping device 42. The clamping device 42 performs horizontal displacement movement and lifting movement driven by the stamping driving device 41. A deformation stamping head 421 is provided on the clamping device 42. The deformation stamping head 421 clamps and cooperates with the upper part of the ear needle tube 1. The shape of the deformation stamping head 421 after closing is the same as the shape of the groove wall of the stamping groove 21. The clamping device 42 performs stamping cooperation with the stamping tooth groove driven by the stamping driving device 41. In the present invention, the single ear needle tube 1 is conveyed one by one through the feeding device 3, the ear needle tube 1 is clamped by the clamping device 42, and the clamping device 42 is moved above the stamping tooth groove by the stamping driving device 41 to stamp the metal sheet. During stamping, due to the deformation of the metal sheet caused by the uneven groove wall of the stamping tooth groove, the metal sheet is clamped with the metal tube and thus relatively fixed. The entire production process does not require manual participation and operates efficiently, so as to perform automated continuous operation. If this technical solution can be popularized and applied, its economic value and social benefits are huge and it has strong market competitiveness.

[0035] The hollow ear needle tube 1 is a vertical short tube. There are various prior art feeding devices 3 for conveying the short tubes. However, in this embodiment, the ear needle tube conveying device 31 includes a vibrating disk mechanism 311 and a discharge pipeline 312. The discharge pipeline 312 communicates with the outlet end of the vibrating disk mechanism 311, and the discharge pipeline 312 is provided with a discharge channel through which the ear needle tube 1 passes horizontally in sequence.The vibrating disk mechanism 311 is a commonly used mechanism in the prior art, so it will not be described in detail. It can convey the disordered ear needle tubes 1 out of its outlet end in an orderly manner through vibration. In order to facilitate the clamping of the subsequent clamping device 42, it is necessary to ensure that the ear needle tubes 1 in the clamping device 42 are in a single vertical state. If the ear needle tubes 1 are discharged vertically from the discharge pipeline 312 in sequence, due to the small diameter of the ear needle tubes 1, the ear needle tubes 1 will necessarily be close to each other when discharged from the vibrating disk mechanism 311. Therefore, when discharged vertically, the distance between the ear needle tubes 1 is too close, making it difficult to ensure that the ear needle tubes 1 can be individually conveyed to the ear needle tube waiting-to-be-taken device 32. Therefore, it is selected to first discharge the ear needle tubes 1 horizontally from the discharge pipeline 312, and then rotate the ear needle tubes 1 to stand upright in the ear needle tube carrying device. This design can ensure the distance between the ear needle tubes 1 after being vertical. The specific design is that the ear needle tube waiting-to-be-taken device includes a waiting-to-be-taken table 321 and a waiting-to-be-taken driving device 322. There are various design methods for the ear needle tube waiting-to-be-taken device 32. One of the methods is that the waiting-to-be-taken table 321 can rotate under the action of the waiting-to-be-taken driving device 322. A perforation for inserting the ear needle tube 1 is provided on the waiting-to-be-taken table 321. When the first ear needle tube 1 is inserted horizontally into the perforation, the waiting-to-be-taken driving device 322 rotates the horizontal ear needle tube 1 into a vertical state. After the vertical ear needle tube 1 is clamped away, the waiting-to-be-taken table 321 rotates back to wait for the next ear needle tube 1. However, it is not easy to control the distance between two adjacent ear needle tubes 1 in this way. In this example, other methods are adopted. As shown in the figure, the waiting-to-be-taken table 321 is a columnar shape, and its upper side is a plane to facilitate the upper end of the rotated ear needle tube 1 to protrude from the waiting-to-be-taken table 321, thus facilitating clamping. A first groove 3211 for adjusting the ear needle angle is provided on the waiting-to-be-taken table 321. The first groove 3211 provides a moving space and a rotation fulcrum for the ear needle tube 1 to change from a horizontal state to a vertical state. Specifically, the first groove 3211 is a groove with a continuous opening opened from the direction of the discharge pipeline 312 to the upper side of the waiting-to-be-taken table 321. The width of this groove is only enough for one ear needle tube 1 to enter, and the depth is a short distance smaller than the end of the ear needle tube 1. The first groove 3211 has only one vertical side wall and one horizontal bottom surface, and the horizontal bottom surface is preferably gradually raised from the innermost end to the outermost end to form an inclined surface. In this way, when the first ear needle tube 1 enters the first groove 3211, since the rear end of the first ear needle tube 1 is higher, the next ear needle tube 1 will top under the first ear needle tube 1. As the next ear needle tube 1 continues to move forward, the first ear needle tube 1 will be pushed by the next ear needle tube 1. The front end of the first ear needle tube 1 abuts against the vertical side surface of the first groove 3211, and the ear needle tube 1 will rotate with the front end as the fulcrum. When the next ear needle tube 1 extends into the deep part of the first groove 3211, the first ear needle tube 1 will become vertical, thus facilitating clamping.

[0036] In some embodiments, such as Figure 7As shown, one end of the ear acupuncture tube 1 is provided with an annular groove 11. The annular groove 11 is provided with at least one, preferably two annular grooves 11. The end provided with the annular groove 11 can enhance the stability after the ear acupuncture is inserted during use.

[0037] Furthermore, as Figure 2 shown, the ear acupuncture tube conveying device 31 further includes a detection mechanism 33. The detection mechanism 33 is arranged above the vibrating disc mechanism 311. The detection mechanism 33 is used to detect that when the ear acupuncture tube 1 discharges from the outlet end of the vibrating disc mechanism 311, the end provided with the annular groove 11 is in the front. The detection mechanism 33 generally selects a video detection device. Such a detection mechanism 33 is a commonly used existing mechanism, so no detailed description is made. Ensuring that the end provided with the annular groove 11 is in the front can ensure that the clamping device 42 can clamp the other end of the ear acupuncture tube 1 during clamping. In this way, after mechanical energy stamping and forming, it can ensure that the metal sheet is fixed at the end of the ear acupuncture tube 1 without the annular groove 11.

[0038] In some embodiments, as Figure 1 and Figure 4As shown, it further includes a metal sheet processing device 5. The stamping and forming device 4 is designed for automation. In order to further enhance the automation degree of this device and reduce the manpower in the entire production process, the metal sheet processing device 5 is added. The metal sheet processing device 5 includes a metal conveying device 51 and a metal stamping device 52. The metal conveying device 51 includes a conveyor belt 511 and a metal strip 512. Driven by the conveyor belt 511, the metal strip 512 moves horizontally above the workbench 2. There is a space on the local area of the conveyor belt 511 on the workbench 2 for the metal stamping device 52 to press down, that is, the middle part of the conveyor belt 511 is in a disconnected state. Because the metal strip 512 has a certain hardness, it does not affect the conveyance of the metal strip 512. And the height of the conveyor belt 511 is close to the upper side height of the workbench 2, so that the distance between the metal strip 512 and the workbench 2 is small, but it does not affect the conveyance of the metal strip 512. The metal stamping device 52 is arranged above the metal strip 512, and the metal stamping device 52 performs stamping operations on the metal strip 512 to form the required circular metal sheet. The metal stamping device 52 is arranged on the stamping drive device 41, and the metal stamping device 52 is arranged on one side of the clamping device 42. The lower end of the metal stamping device 52 is provided with a forming stamping head 521. The stamping drive device 41 includes a left-right displacement device 411 and a front-back displacement device 412, both of which are common existing linear reciprocating mechanisms, generally a motor screw module, that is, the motor drives the screw to rotate, so that the sliding seat on the screw moves. In this embodiment, the front-back displacement device 412 is located on the front-back displacement device 412. The metal stamping device 52 and the clamping device 42 are both arranged on the side of the front-back displacement device 412 close to the workbench 2. The clamping device 42 includes a first lifting drive 422, a first support frame 423, a clamping support frame 424, a clamping drive 425 and two clamping members 426. The first support frame 423 is arranged on the stamping drive device 41. The first support frame 423 is a bracket including a vertical plate and a horizontal plate. The first lifting drive 422 is arranged on the first support frame 423 and connects the clamping support frame 424. The clamping drive is arranged on the clamping support frame 424 and connects the two clamping members 426. The end of the clamping member 426 is provided with the deformation stamping head 421. The metal stamping device 52 includes a second lifting drive 522 and a stamping member 523. The first support frame 423 is a bracket including a vertical plate and a horizontal plate. The first lifting drive 422 and the second lifting drive 522 are fixed on the horizontal plate. The stamping member 523 is a rectangular block. The upper end of the stamping member 523 is connected to the second lifting drive 522. The lower end of the stamping member 523 is provided with a cylinder, the end of which is semi-circular, and a perforated column is also provided at the lower end of the semi-circular shape. When manufacturing the metal sheet, the stamping drive device 41 moves the metal stamping device 52 above the metal strip 512. At this time, the distance between the metal strip 512 and the workbench 2 is almost small,The stamping part 523 is driven by the second lifting drive 522 to stamp the metal strip 512. The metal strip 512 leaves a circular metal sheet in the stamping groove 21 under the cooperation of the cylinder of the stamping part 523, the clamping support frame 424 and the stamping part 523. There is a perforation formed by stamping with a perforating column in the middle of the metal sheet. The diameter of the perforation is not greater than the diameter of the ear needle tube 1. It is vertically slidably arranged on the vertical plate. A clamping drive is fixed at the upper end of the clamping support frame 424. Two clamping parts 426 are horizontally slidably arranged on the clamping support frame 424. The clamping drive enables the two clamping parts 426 to move synchronously and approach each other simultaneously to achieve clamping. In this embodiment, the clamping part 426 is an inverted L-shaped plate. A quarter-circular protrusion is provided at the lower end of the clamping part 426. The two clamping parts 426 are combined to form a semi-circle, and continuous petal-shaped protrusions are provided on the outer side of the semi-circle. When the first lifting drive 422 drives the clamping to move downward, the metal sheet is affected by the petal-shaped protrusions in the stamping tooth groove. While the ear needle tube 1 extends into the perforation, the metal sheet deforms, resulting in the reduction of the aperture of the perforation in the middle of the metal sheet, so that the perforation tightly abuts against the tube wall of the ear needle tube 1, thereby fixing the metal sheet on the ear needle tube 1.,

[0039] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of protection of the present invention.

Claims

1. A hollow earring assembly device, the earring comprising an earring tube and a metal sheet, characterized in that, it includes a workbench, on which there is a stamping groove for stamping, and the groove wall of the stamping groove is uneven and corrugated. The metal sheet to be processed is placed in the stamping groove, and there is an earring hole in the middle of the stamping groove for the earring tube to extend into; a feeding device, which includes an earring tube conveying device and an earring tube waiting-to-be-taken device. The earring tube conveying device is used to convey earrings one by one to the earring tube waiting-to-be-taken device; a stamping and forming device, the stamping and forming device including a driving device and a clamping device. The clamping device performs horizontal displacement movement and lifting movement driven by the driving device. There is a deformation stamping head on the clamping device, and the deformation stamping head is clamped and matched with the upper part of the earring tube. The shape after the deformation stamping head is closed is the same as the shape of the groove wall of the stamping groove. The clamping device performs stamping cooperation with the stamping groove driven by the driving device; the clamping device includes a first lifting drive, a first support frame, a clamping support frame, a clamping drive and two clamping members. The first support frame is arranged on the driving device, the first lifting drive is arranged on the first support frame and is connected to the clamping support frame, the clamping drive is arranged on the clamping support frame and is connected to the two clamping members, and the deformation stamping head is arranged at the end of the clamping member.

2. A hollow earring assembly device according to claim 1, characterized in that, the stamping groove is a circular groove, and there are a plurality of petal-shaped grooves arranged in an array on the groove wall of the stamping groove.

3. A hollow earring assembly device according to claim 1, characterized in that, the earring tube conveying device includes a vibrating disc mechanism and a discharge pipeline. The discharge pipeline is communicated with the outlet end of the vibrating disc mechanism, and the discharge pipeline is provided with a discharge channel for the earring to pass through horizontally in sequence.

4. A hollow earring assembly device according to claim 3, characterized in that, the earring tube waiting-to-be-taken device includes a waiting-to-be-taken table and a waiting-to-be-taken driving device. There is a first groove for adjusting the angle of the earring on the waiting-to-be-taken table, and the first groove provides a moving space and a rotation fulcrum for the earring tube to change from a horizontal state to a vertical state.

5. A hollow earring assembly device according to claim 4, characterized in that, one end of the earring is provided with an annular groove.

6. A hollow earring assembly device according to claim 5, characterized in that, the earring tube conveying device further includes a detection mechanism, and the detection mechanism is arranged above the vibrating disc mechanism. The detection mechanism is used to detect that the end with the annular groove is in the front when the earring exits from the outlet end of the vibrating disc mechanism.

7. A hollow earring assembly device according to claim 1, characterized in that, it further includes a metal sheet processing device, the metal sheet processing device including a metal conveying device and a metal stamping device. The metal conveying device includes a conveyor belt and a metal strip. The metal strip moves horizontally above the workbench driven by the conveyor belt. The metal stamping device is arranged above the metal strip, and the metal stamping device performs stamping operations on the metal strip to form the required circular metal sheet.

8. An assembly device for hollow ear pins according to claim 7, characterized in that, the metal stamping device is arranged on the driving device, the metal stamping device is arranged on one side of the clamping device, and a forming stamping head is arranged at the lower end of the metal stamping device.

9. An assembly device for hollow ear pins according to claim 1, wherein the driving device comprises a left-right displacement device and a front-back displacement device.

Citation Information

Patent Citations

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  • Fixing part assembling equipment

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  • Arch-shaped reed stamping device

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