Elastic sheet painting equipment

Abstract

The utility model discloses an elastic piece painting device, which relates to the field of zipper puller processing and comprises a workbench. A feeding unit; the elastic sheets are conveyed from the feeding unit to the material receiving unit; the double-sided painting mechanism is arranged between the feeding unit and the receiving unit, and the double-sided painting mechanism further comprises a paint tank; the paint groove is covered with the tempered glass; the feeding unit, the receiving unit and the double-face painting mechanism are arranged in a matched mode, the double-face painting mechanism is composed of the paint groove, tempered glass, the upper oil guiding felt, the lower oil guiding felt and the like, the upper oil guiding felt and the lower oil guiding felt are installed in the paint groove, and an elastic piece passes through the space between the upper oil guiding felt and the lower oil guiding felt to complete painting. In the process that the elastic pieces are conveyed from the feeding unit to the material collecting unit, the elastic pieces enter the paint groove and pass through the space between the upper oil guiding felt and the lower oil guiding felt, double-face painting work of the elastic pieces is completed, painting is sufficient and uniform, the elastic pieces are wound through the material collecting unit finally after painting is completed, and the functions of discharging, painting and winding of the elastic pieces are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of zipper pull head processing, and more particularly to a spring piece painting device. Background Art

[0002] There are many types of zipper pulls. The basic structure consists of a slider body and a pull tab. The hook assembly between the pull tab and the slider body varies depending on the type of zipper pull. For self-locking zipper pulls, the slider body is assembled from a nose cap, spring, and hook. During the zipper pull manufacturing process, it is electroplated. In related technologies, during electroplating, the spring and hook can easily stick together, causing the zipper pull to become unlocked. Manual or mechanical pulling is required to separate the hook and the spring before the zipper can be used.

[0003] To address these issues, the shrapnel needs to be painted to prevent it from sticking to the hook. However, this process involves manually unrolling the rolled shrapnel and then soaking it in a paint bucket. This method often results in problems such as the middle shrapnel not being painted and uneven paint layer thickness. When the painted shrapnel is dried in an oven, it's difficult to dry out the uneven paint layer.

[0004] In summary, how to achieve automatic double-sided painting of shrapnel and ensure uniform thickness of the paint layer is a problem that currently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a shrapnel painting device, which effectively solves the problems in the prior art of partial non-painting of shrapnel and uneven thickness of the paint layer.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A shrapnel painting device comprises: a workbench;

[0008] A feeding unit is installed on the workbench;

[0009] A receiving unit is provided on a side of the workbench away from the feeding unit, and the spring pieces are transported from the feeding unit to the receiving unit;

[0010] A double-sided painting mechanism is provided between the feeding unit and the receiving unit, and the double-sided painting mechanism further comprises:

[0011] A paint tank, installed on the workbench;

[0012] Tempered glass, covering the paint tank to form a sealed painting space in the paint tank;

[0013] The upper and lower oil guide felts are installed in the paint tank, and the spring piece passes between the upper and lower oil guide felts to complete the painting.

[0014] Preferably, a feed port and a receiving port are respectively provided on both sides of the paint tank, the feed port is close to the feed unit, and the receiving port is close to the receiving unit. The upper ends of the feed port and the receiving port pass through the upper end surface of the paint tank, and two adjustment blocks are provided on the paint tank, and the two adjustment blocks partially extend into the feed port and the receiving port respectively, for controlling the thickness of the paint.

[0015] Preferably, a guide plate is provided in the paint tank, and the guide plate is provided on one side of the upper and lower oil guide felts close to the material receiving port. A groove is provided on the guide plate, and the spring passes through the groove.

[0016] Preferably, an oil supply assembly is provided on one side of the paint tank, and the oil supply assembly includes:

[0017] A paint bucket containing nano paint is fixed on the workbench;

[0018] A pipe has one end connected to the paint bucket and the other end connected to the paint tank.

[0019] Preferably, the feeding unit comprises:

[0020] an unwinding reel, mounted on the workbench;

[0021] A damping mechanism is installed between the unwinding reel and the double-sided painting mechanism, and the damping mechanism includes:

[0022] A mounting base, fixed on the workbench;

[0023] a damping wheel rotatably mounted on the mounting seat;

[0024] An upper pressing wheel is rotatably mounted on the mounting base and is located above the damping wheel, with a spring sheet passing between the damping wheel and the upper pressing wheel;

[0025] The damper is mounted on the mounting seat, and the damper is connected to the damping wheel.

[0026] Preferably, the damping mechanism further includes a guide shaft, the guide shaft is arranged on at least one side of the damping wheel, a guide groove is formed on the guide shaft, and the spring extends toward the receiving port through the guide groove.

[0027] Preferably, an oven is further included, which is fixed on the workbench and located between the double-sided painting mechanism and the material receiving unit. Openings for shrapnel to pass through are provided at both ends of the oven, and the shrapnel is dried in the oven.

[0028] Preferably, the material receiving unit includes:

[0029] A winding mechanism, fixed on the workbench, for receiving the processed shrapnel;

[0030] The left-right reversing mechanism is provided on the side of the winding mechanism that receives the spring sheet and is used to adjust the winding position of the spring sheet. The left-right reversing mechanism includes:

[0031] a linear displacement assembly mounted on the workbench, the linear displacement assembly having at least one moving end;

[0032] The reversing wheel is installed at the moving end of the linear displacement component.

[0033] Preferably, the winding mechanism includes a motor and a winding reel, the winding reel is installed at the output end of the motor, and the moving path of the moving end of the linear displacement assembly is parallel to the axial direction of the winding reel.

[0034] Preferably, the material receiving unit further comprises:

[0035] An encoding speed measuring mechanism is provided between the double-sided painting mechanism and the left-right reversing mechanism, and is provided in cooperation with the winding mechanism to adjust the linear speed of the spring;

[0036] The spring tensioning mechanism is arranged between the encoding speed measuring mechanism and the left-right reversing mechanism.

[0037] The utility model provides a shrapnel painting device, comprising: a workbench; a feeding unit, installed on the workbench; a receiving unit, arranged on one side of the receiving unit, and the shrapnel is transported from the feeding unit to the receiving unit; a double-sided painting mechanism, arranged between the feeding unit and the receiving unit, and the double-sided painting mechanism further comprises: a paint trough, installed on the workbench; tempered glass, covering the paint trough to form a sealed painting space in the paint trough; upper and lower oil guide felts, installed in the paint trough, and the shrapnel passes between the upper and lower oil guide felts to complete the painting.

[0038] The shrapnel painting equipment provided by the utility model utilizes the coordinated arrangement of a feeding unit, a receiving unit and a double-sided painting mechanism. The double-sided painting mechanism is composed of a paint trough, tempered glass, upper and lower oil guide felts and other components. In the process of the shrapnel being conveyed from the feeding unit to the receiving unit, it enters the paint trough and passes between the upper and lower oil guide felts to complete the double-sided painting of the shrapnel. The painting is sufficient and uniform. After the painting is completed, it is finally reeled up by the receiving unit, realizing the functions of discharging, painting and reeling the shrapnel.

[0039] The further solution provided in this application can also achieve at least one of the following beneficial technical effects:

[0040] The shrapnel enters from the feed port of the paint tank, and the receiving port is the output. The entire painting process is located in the paint tank. With the cooperation of tempered glass, fully enclosed painting is achieved to protect the paint layer, making it difficult to evaporate and solidify, and ensuring long-term use of the paint. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0042] Figure 1 This is the overall structure diagram of the shrapnel painting equipment;

[0043] Figure 2 This is the exploded structural diagram of the double-sided painting mechanism;

[0044] Figure 3 for Figure 1 A schematic diagram of the structure at center A;

[0045] Figure 4 This is the exploded diagram of the damping mechanism.

[0046] Figure 1-Figure 4 , the reference numerals include:

[0047] 1. Workbench;

[0048] 2. Feed unit; 21. Unwinding reel; 22. Damping mechanism; 221. Mounting seat; 222. Damping wheel; 223. Upper pressure wheel; 224. Damper; 225. Guide shaft;

[0049] 3. Material receiving unit; 31. Rewinding mechanism; 311. Rewinding reel; 32. Left-right reversing mechanism; 321. Linear displacement assembly; 322. Reversing wheel; 33. Encoding speed measuring mechanism; 34. Shrapnel tensioning mechanism;

[0050] 4. Double-sided painting mechanism; 41. Paint tank; 42. Tempered glass; 43. Oil guide felt; 44. Adjustment block; 45. Guide plate;

[0051] 5. Oil supply assembly; 51. Paint bucket; 52. Pipeline;

[0052] 6. Oven. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] Unless otherwise defined, the technical terms or scientific terms used in the present application shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly. The embodiment of the present application discloses a shrapnel painting device.

[0055] The core of the utility model is to provide a shrapnel painting device.

[0056] Please refer to Figures 1 to 4 The shrapnel painting equipment provided by the present invention includes a workbench 1, a feeding unit 2, a receiving unit 3 and a double-sided painting mechanism 4. The feeding unit 2 is installed on the workbench 1, and the receiving unit 3 is arranged on the side of the workbench 1 away from the feeding unit 2. The shrapnel is transported from the feeding unit 2 to the receiving unit 3. The double-sided painting mechanism 4 is arranged between the feeding unit 2 and the receiving unit 3. The double-sided painting mechanism 4 further includes a paint trough 4, tempered glass 42 and upper and lower oil guide felts 43. The paint trough 41 is installed on the workbench 1, and the tempered glass 42 covers the paint trough 41 to form a sealed painting space in the paint trough 41. The upper and lower oil guide felts 43 are installed in the paint trough 41. The shrapnel passes between the upper and lower oil guide felts 43 to complete the painting.

[0057] Specifically, the above-mentioned workbench 1 provides basic support for each component, and its overall structure is preferably set to be a long strip. The feeding unit 2 and the receiving unit 3 are respectively located at the two ends of the length direction of the workbench 1. The shrapnel is transported from the feeding unit 2 to the receiving unit 3, and the above-mentioned double-sided painting mechanism 4 is arranged on its conveying path, wherein the receiving unit 3 can apply pulling force to the shrapnel to realize automatic conveying and collection of the shrapnel.

[0058] Tempered glass 42 is integrated with paint trough 41. The paint trough 41 is a rectangular box-like structure with an open top. Tempered glass 42 covers the opening, creating a relatively enclosed painting space within the paint trough 41. Upper and lower oil guides 43 are installed within the paint trough 41. When the spring is transported from the feed port to the receiving port of the paint trough 41, it passes between the upper and lower oil guides 43, achieving double-sided painting.

[0059] The above-mentioned shrapnel painting equipment effectively solves the problems of partial areas of the shrapnel being unable to be painted and uneven paint layer thickness when the shrapnel is currently painted manually.

[0060] The following is a more detailed introduction to the shrapnel painting equipment provided by the present invention in conjunction with the accompanying drawings and specific embodiments.

[0061] Based on any of the above embodiments, Figure 2 A feed port and a receiving port are respectively provided on both sides of the paint tank 41. The feed port is close to the feed unit 2, and the receiving port is close to the receiving unit 3. The upper ends of the feed port and the receiving port pass through the upper end surface of the paint tank 41. Two adjustment blocks 44 are provided on the paint tank 41. The two adjustment blocks 44 partially extend into the feed port and the receiving port respectively, for controlling the thickness of the paint.

[0062] Specifically, adjustment block 44 comprises a support portion and an insertion portion. The insertion portion can be inserted through the ports of the paint tank 41, extending through the feed and receiving ports, to a predetermined depth. This allows excess paint to be filled in the ports, preventing paint leakage. Furthermore, because the feed and receiving ports have a predetermined depth, the lower surface of the spring piece contacts the bottom surfaces of both ports as it passes through the paint tank 41. By adjusting the depth of the adjustment block 44 inserted into the receiving port, excess paint is scraped off as the spring piece passes, thereby adjusting the paint thickness on the spring piece.

[0063] Based on any of the above embodiments, Figure 2 A guide plate 45 is provided in the paint tank 41. The guide plate 45 is provided on one side of the upper and lower oil guide felts 43 close to the receiving port. A groove is provided on the guide plate 45, and the spring passes through the groove.

[0064] Specifically, the guide plate 45 is a rectangular plate structure and is fixed vertically in the paint tank 41. A groove is formed at the lower end of the guide plate 45. The height of the groove is greater than the thickness of the spring, and the width of the groove is equal to the width of the spring, so as to guide the spring during the painting process.

[0065] It should be noted that the connection structure between the guide plate 45 and the paint trough 41 can be that a locking plate is formed at the top of the guide plate 45, and the length of the locking plate is greater than the width inside the paint trough 41, so that the two ends of the locking plate are clamped on the upper end surface of the paint trough 41. When the tempered glass 42 covers the paint trough 41, it can apply downward pressure to the locking plate, thereby fixing the guide plate 45 in the paint trough 41. This connection structure can facilitate the cleaning or replacement of the guide plate 45.

[0066] Based on any of the above embodiments, Figure 2 An oil supply assembly 5 is provided on one side of the paint tank 41. The oil supply assembly 5 includes a paint bucket 51 and a pipe 52. The paint bucket 51 is filled with nano paint and is fixed on the workbench 1. One end of the pipe 52 is connected to the paint bucket 51, and the other end is connected to the paint tank 41.

[0067] Specifically, the paint bucket 51 is installed at a higher position on the workbench 1 and at least above the paint tank 41. The connection end of the pipe 52 and the paint bucket 51 is located at the bottom of the paint bucket 51, so that the nano paint contained in the paint bucket 51 can flow more smoothly through the pipe 52 into the paint tank 41.

[0068] It should be noted that, in order to facilitate the control of the on-off of the pipeline 52, a valve or other components may be installed in the middle of the pipeline 52. This part is common knowledge and will not be elaborated here.

[0069] Based on any of the above embodiments, Figure 1 、 Figure 3 and Figure 4 The feeding unit 2 includes a reel 21 and a damping mechanism 22. The reel 21 is mounted on the workbench 1. The damping mechanism 22 is mounted between the reel 21 and the double-sided painting mechanism 4. The damping mechanism 22 includes a mounting seat 221, a damping wheel 222, an upper pressure wheel 223, and a damper 224. The mounting seat 221 is fixed to the workbench 1. The damping wheel 222 is rotatably mounted on the mounting seat 221. The upper pressure wheel 223 is rotatably mounted on the mounting seat 221 and is located above the damping wheel 222. The spring piece passes between the damping wheel 222 and the upper pressure wheel 223. The damper 224 is mounted on the mounting seat 221 and is connected to the damping wheel 222.

[0070] Specifically, the unwinding disk 21 is rotatably connected to the workbench 1. Initially, the spring piece is wound on the unwinding disk 21. When the receiving unit 3 applies tension to the spring piece, the unwinding disk 21 rotates to unwind the spring piece, thereby realizing automatic unwinding. Of course, the unwinding disk 21 can also be driven to rotate by a power element so that the unwinding disk 21 and the receiving unit 3 can better cooperate. The power element can be an electric motor or the like.

[0071] Furthermore, the spring piece drawn out from the unwinding disk 21 passes between the upper pressure wheel 223 and the damping wheel 222, and the resistance is adjusted by the damping wheel 222 and the damper 224, and the spring piece is pressurized by the upper pressure wheel 223 to keep the resistance stable, so that the spring piece is finally transported smoothly and at a uniform speed during the unwinding and winding process.

[0072] Based on any of the above embodiments, Figure 3 The damping mechanism 22 further includes a guide shaft 225 , which is disposed on at least one side of the damping wheel 222 . A guide groove is formed on the guide shaft 225 , and the spring extends toward the receiving port through the guide groove.

[0073] Specifically, the guide shaft 225 adopts a roller structure, and an annular positioning groove is provided on the guide shaft 225 to position the spring piece.

[0074] It should be noted that, preferably, two groups of guide shafts 225 are provided, and the two groups of guide shafts 225 are respectively provided on a side of the damping wheel 222 close to the unwinding disk 21 and a side of the damping wheel 222 away from the unwinding disk 21 .

[0075] Based on any of the above embodiments, Figure 1 The shrapnel painting equipment provided by the present invention also includes an oven 6, which is fixed on the workbench 1 and located between the double-sided painting mechanism 4 and the material receiving unit 3. Openings for the shrapnel to pass through are provided at both ends of the oven 6, and the shrapnel is dried in the oven 6.

[0076] Specifically, the shrapnel led out from the discharge port of the double-sided painting mechanism 4 enters the oven 6 through the opening, and the internal components of the oven 6 simultaneously dry the two painted surfaces of the shrapnel. After drying, it is led out from the opening at the other end of the oven 6 and transported to the discharge unit.

[0077] The components in the oven 6 should include at least a heating element and a blowing element. Parameters such as drying temperature and wind speed should be set according to actual production needs to ensure drying efficiency and quality.

[0078] Based on any of the above embodiments, Figure 1 The material receiving unit 3 includes a winding mechanism 31 and a left-right reversing mechanism 32. The winding mechanism 31 is fixed to the workbench 1 and is used to receive the processed spring sheet. The left-right reversing mechanism 32 is located on the side of the winding mechanism 31 that receives the spring sheet and is used to adjust the rewinding position of the spring sheet. The left-right reversing mechanism 32 includes a linear displacement assembly 321 and a reversing wheel 322. The linear displacement assembly 321 is mounted on the workbench 1 and has at least one movable end. The reversing wheel 322 is mounted to the movable end of the linear displacement assembly 321.

[0079] Specifically, the dried shrapnel drawn out from the oven 6 extends to the winding mechanism 31 through the reversing wheel 322. During the process of the winding mechanism 31 winding up the extended shrapnel, the linear displacement component 321 drives the reversing wheel 322 to move linearly, so that the shrapnel is evenly distributed during the winding process.

[0080] It should be noted that the linear displacement component 321 can adopt a screw and nut transmission component, or other components that can achieve the same effect, which is not limited here.

[0081] Based on any of the above embodiments, Figure 1 The winding mechanism 31 includes a motor (not shown in the drawings) and a winding disk 311 , which is installed at the output end of the motor. The moving path of the moving end of the linear displacement component 321 is parallel to the axial direction of the winding disk 311 .

[0082] Specifically, one end of the spring piece is extended to the winding disk 311 and fixed, and the winding disk 311 is rotated by the motor, so that the spring piece in transit is subjected to tension and gradually wound on the winding disk 311 at a uniform speed.

[0083] Based on any of the above embodiments, Figure 1 The material receiving unit 3 also includes a coding speed measuring mechanism 33 and a spring tensioning mechanism 34. The coding speed measuring mechanism 33 is arranged between the double-sided painting mechanism 4 and the left and right reversing mechanism 32, and is cooperated with the winding mechanism 31 to adjust the linear speed of the spring. The spring tensioning mechanism 34 is arranged between the coding speed measuring mechanism 33 and the left and right reversing mechanism 32.

[0084] Specifically, the encoding speed measuring mechanism 33 can calculate the rotational speed of the motor by measuring the number of pulses output by the encoder, and ensure that the motor runs at a uniform speed by monitoring the rotational speed of the motor in real time.

[0085] Since the diameter of the shrapnel roll is constantly changing during the operation of the equipment, when the diameter changes, the conveying speed of the shrapnel will also change. Therefore, it is very difficult to match the discharge and feeding speeds. At this time, through the setting of the shrapnel tensioning mechanism 34, it can discharge the material in time when it detects the lack of material, and stop discharging the material in time after discharging a certain length.

[0086] The embodiment of the present application provides a shrapnel painting device, in which the shrapnel is initially wound on the unwinding reel 21. The operator pulls one end of the shrapnel through the damping mechanism 22, the double-sided painting mechanism 4, the oven 6, the encoding speed measuring mechanism 33 and the shrapnel tensioning mechanism 34 in sequence, and then fixes it on the winding reel 311. The motor drives the winding reel 311 to rotate, so that the shrapnel is subjected to tension and gradually wound toward the winding reel 311. The shrapnel on the unwinding reel 21 is then unwound. The unwound shrapnel passes through the double-sided painting mechanism 4 to paint its upper and lower surfaces, and then passes through the oven 6 to dry the painted shrapnel. The dried shrapnel is finally wound on the winding reel 311.

[0087] The above is a detailed introduction to the shrapnel painting device provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above examples is only intended to help understand the method and core concept of the present invention. It should be noted that for those skilled in the art, various improvements and modifications can be made to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A shrapnel painting device, characterized in that: include: Workbench (1); A feeding unit (2) is installed on the workbench (1); A receiving unit (3) is arranged on a side of the workbench (1) away from the feeding unit (2), and the spring pieces are transported from the feeding unit (2) to the receiving unit (3); A double-sided painting mechanism (4) is provided between the feeding unit (2) and the receiving unit (3), and the double-sided painting mechanism (4) further comprises: A paint tank (41) is mounted on the workbench (1); Tempered glass (42) covers the paint tank (41) to form a sealed painting space in the paint tank (41); The upper and lower oil guide felts (43) are installed in the paint tank (41), and the spring piece passes between the upper and lower oil guide felts (43) to complete the painting.

2. The shrapnel painting device according to claim 1, characterized in that: A feed port and a receiving port are respectively provided on both sides of the paint tank (41), wherein the feed port is close to the feed unit (2), and the receiving port is close to the receiving unit (3), and the upper ends of the feed port and the receiving port pass through the upper end surface of the paint tank (41). Two adjustment blocks (44) are provided on the paint tank (41), and the two adjustment blocks (44) partially extend into the feed port and the receiving port respectively, for controlling the thickness of the paint.

3. The shrapnel painting device according to claim 2, characterized in that: A guide plate (45) is provided in the paint tank (41). The guide plate (45) is provided on one side of the upper and lower oil guide felts (43) close to the receiving port. A groove is provided on the guide plate (45), and a spring piece passes through the groove.

4. The shrapnel painting device according to claim 1, characterized in that: An oil supply assembly (5) is provided on one side of the paint tank (41), and the oil supply assembly (5) comprises: A paint bucket (51) containing nano paint and fixed on the workbench (1); A pipe (52) is connected to the paint bucket (51) at one end and to the paint tank (41) at the other end.

5. The shrapnel painting device according to claim 2, characterized in that: The feeding unit (2) comprises: An unwinding reel (21) is mounted on the workbench (1); A damping mechanism (22) is installed between the unwinding disc (21) and the double-sided painting mechanism (4), and the damping mechanism (22) further comprises: A mounting seat (221) is fixed on the workbench (1); A damping wheel (222) is rotatably mounted on the mounting seat (221); An upper pressing wheel (223) is rotatably mounted on the mounting seat (221) and is located above the damping wheel (222), with a spring sheet passing between the damping wheel (222) and the upper pressing wheel (223); A damper (224) is mounted on the mounting seat (221), and the damper (224) is connected to the damping wheel (222).

6. The shrapnel painting device according to claim 5, characterized in that: The damping mechanism (22) further comprises a guide shaft (225), the guide shaft (225) being arranged on at least one side of the damping wheel (222), a guide groove being formed on the guide shaft (225), and the spring piece extending toward the receiving port through the guide groove.

7. The shrapnel painting device according to claim 1, characterized in that: It also includes an oven (6), which is fixed on the workbench (1) and located between the double-sided painting mechanism (4) and the material receiving unit (3). Both ends of the oven (6) are provided with openings for the shrapnel to pass through, and the shrapnel is dried in the oven (6).

8. A shrapnel painting device according to any one of claims 1 to 7, characterized in that: The material receiving unit (3) comprises: A winding mechanism (31) is fixed on the workbench (1) and is used to receive the processed shrapnel; A left-right reversing mechanism (32) is provided on the side of the winding mechanism (31) that receives the spring sheet and is used to adjust the winding position of the spring sheet. The left-right reversing mechanism (32) further comprises: A linear displacement component (321) is mounted on the workbench (1), wherein the linear displacement component (321) has at least one moving end; The reversing wheel (322) is mounted on the moving end of the linear displacement component (321).

9. The shrapnel painting device according to claim 8, characterized in that: The winding mechanism (31) comprises a motor and a winding disk (311), wherein the winding disk (311) is mounted on the output end of the motor, and the moving path of the moving end of the linear displacement component (321) is parallel to the axial direction of the winding disk (311).

10. The shrapnel painting device according to claim 8, characterized in that: The material receiving unit (3) further comprises: An encoding speed measuring mechanism (33) is provided between the double-sided painting mechanism (4) and the left-right reversing mechanism (32), and is provided in conjunction with the winding mechanism (31) to adjust the linear speed of the spring; The spring tensioning mechanism (34) is arranged between the encoding speed measuring mechanism (33) and the left-right reversing mechanism (32).

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