Spinneret plate cleaning machine
By introducing y-axis and x-axis drive structures into the spinneret cleaning machine, simultaneous cleaning of both sides of the spinneret is achieved, solving the problem of low cleaning efficiency in the existing technology, improving cleaning efficiency, and ensuring a comprehensive cleaning effect on the spinneret.
Patent Information
- Application Number
- CN202423297602.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing spinneret cleaning equipment can only clean one side of the spinneret, resulting in low cleaning efficiency. It also requires manual flipping, leading to overall inefficiency.
Design a spinneret cleaning machine that adopts a y-axis and x-axis drive structure to achieve horizontal reciprocating motion in the y-axis and x-axis directions respectively. Set up two sets of cleaning structures to achieve simultaneous cleaning of both sides of the spinneret. High-pressure water mist is used for rinsing, and a positioning structure is combined to ensure that the spinneret does not fall off.
It enables simultaneous cleaning of both sides of the spinneret without the need for manual flipping, significantly improving cleaning efficiency and ensuring thorough cleaning of all spinnerets.
Smart Images

Figure CN223646687U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a spinneret cleaning equipment technical field, concretely is a spinneret cleaning machine. BACKGROUND
[0002] Spinneret is also called spinning cap. The function of spinneret is that high polymer melt or solution in sticky flow state is changed into fine flow with specific cross section through micro hole, and the fine flow is solidified to form yarn through coagulation medium such as air or coagulation bath. After long time use, there is residual polymer in the surface and micro hole of spinneret, which influences spinning effect, so spinneret must be cleaned regularly to ensure normal use. The patent with publication number CN209428645U is a product used by our company, a spinneret high-pressure washing machine, which washes spinneret through high-pressure water. However, it can only clean one side of spinneret, and the other side is cleaned by manually turning over the spinneret during the cleaning process, so the overall cleaning efficiency is too low. SUMMARY
[0003] In order to solve the problem of low efficiency of spinneret cleaning structure in the prior art, the utility model provides a spinneret cleaning machine, which can clean both sides of spinneret at the same time, effectively improving the cleaning efficiency.
[0004] The structure of the utility model is as follows: a spinneret cleaning machine, which comprises a cleaning structure and a positioning structure, characterized in that the cleaning structure is provided in two groups and arranged above and below the positioning structure respectively.
[0005] The positioning structure comprises positioning through holes arranged in a row and column form, and the spinneret to be cleaned is arranged in the positioning through holes.
[0006] The cleaning structure realizes horizontal reciprocating motion in y-axis direction based on y-direction driving structure, and the positioning structure realizes horizontal reciprocating motion in x-axis direction based on x-direction driving structure.
[0007] Further features are as follows:
[0008] The cleaning structure comprises a spray head and a high-pressure water pipe, and the spray head is connected to the high-pressure water pipe; the spray direction of the spray head is towards the positioning structure.
[0009] The spray head is a fan-shaped spray head.
[0010] The y-direction driving structure comprises a y-axis driving motor, a y-axis screw rod, a connecting frame and a cleaning connecting structure.
[0011] The output shaft of the y-axis driving motor is connected with the y-axis screw rod, the connecting frame is in the shape of a Chinese character "fang", two open ends are arranged along the y-axis direction and face the positioning structure, and the middle part of the Chinese character "fang" is sleeved on the y-axis screw rod based on the threaded connection; the two open ends of the Chinese character "fang" are connected with one of the cleaning structures respectively;
[0012] The cleaning connecting structure comprises a horizontally arranged track support, a y-axis track plate, first rollers and a roller frame; the y-axis track plate is arranged on the track support; the roller frame is in the shape of a Chinese character "n", two first rollers arranged in the vertical direction are a group, two groups of first rollers are symmetrically mounted on the y-axis track plate based on two vertical edges of the roller frame, and two first rollers in the same group are symmetrically arranged above and below the y-axis track plate respectively; and the end plate of the roller frame is connected with the cleaning structure;
[0013] The x-direction driving structure comprises an x-axis driving motor, x-axis screw rods, x-axis tracks, a resting frame and a nut sleeve;
[0014] The two x-axis screw rods are arranged in parallel, and the x-axis screw rods are connected with the output end of the x-axis driving motor;
[0015] The two x-axis tracks are arranged in parallel between the two x-axis screw rods; the two resting frames are arranged in parallel above the x-axis tracks; support rollers are arranged at the bottom of the resting frame and are rollingly mounted on the x-axis tracks; the nut sleeve is arranged outside the support rollers below the resting frame and is sleeved on the x-axis screw rod based on the threaded connection;
[0016] The distance between the two resting frames is less than the width of the positioning structure;
[0017] The x-direction driving structure further comprises a connecting shaft, a driving bevel gear and a driven bevel gear;
[0018] The connecting shaft is connected with the output end of the x-axis driving motor;
[0019] One of the driven bevel gears is arranged between the two x-axis screw rods respectively; the connecting shaft is arranged in the y-axis direction, one of the driving bevel gears is arranged at a position symmetric to the two x-axis screw rods on the connecting shaft respectively, and each of the driving bevel gears is meshingly connected with one of the driven bevel gears;
[0020] The positioning structure comprises a positioning plate and a pressing plate;
[0021] The positioning through hole is arranged on the positioning plate, the inner cavity of the positioning through hole is a stepped cavity with a narrow lower part and a wide upper part, the outlet diameter of the positioning through hole is smaller than the inlet diameter; the diameter and depth of the inner cavity of the wider inlet part of the positioning through hole are adapted to the shape and size of the jetting plate to be cleaned;
[0022] The anti-falling through hole is a through hole with the same diameter from top to bottom, and the diameter of the anti-falling through hole is greater than the diameter of the narrower outlet in the positioning through hole and smaller than the diameter of the anti-falling through hole inlet;
[0023] Each anti-falling through hole on the pressing plate has a corresponding concentric positioning through hole on the positioning plate;
[0024] The positioning through holes in the two adjacent rows on the positioning plate are staggered.
[0025] The jet plate cleaning mechanism provided by the utility model places the jet plate to be cleaned in the positioning through hole arranged in rows and columns, and simultaneously sets the cleaning structure above and below the positioning structure; the cleaning structure is driven by the y-direction driving structure to realize reciprocating horizontal movement along the y-axis direction, and each column of jet plates to be cleaned arranged in the y-axis direction are cleaned from the upper and lower directions; the positioning structure is driven by the x-direction driving structure to realize horizontal movement in the x-axis direction, so that each column of jet plates to be cleaned is moved to the cleaning position of the cleaning structure, and all the jet plates to be cleaned in the positioning structure can be cleaned; the jet plates to be cleaned need not be turned over manually during the cleaning process, the cleaning efficiency is effectively improved, and the x-direction driving and y-direction driving are used to drive the positioning structure and the cleaning structure respectively, so that all the jet plates to be cleaned arranged in rows and columns can be cleaned, and the cleaning efficiency is further improved. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 It is a structure schematic view of the front view of the jet plate cleaning mechanism of the utility model;
[0027] Figure 2 It is a structure schematic view of the front view of the jet plate cleaning mechanism of the utility model; Figure 1 It is an enlarged structure schematic view of A in the middle;
[0028] Figure 3 It is a structure schematic view of the left view of the jet plate cleaning mechanism;
[0029] Figure 4 It is a structure schematic view of the top view of the jet plate cleaning mechanism;
[0030] Figure 5 It is a whole structure schematic view of the positioning structure;
[0031] Figure 6 It is a structure schematic view of the positioning plate;
[0032] Figure 7 It is a structure schematic view of the section of the positioning plate;
[0033] Figure 8 It is a structure schematic view of the pressing plate;
[0034] Figure 9 Structure schematic diagram of the pressing plate is sectioned;
[0035] Figure 10 Structure schematic diagram of the water supply device is shown. Figure 5 Structure schematic diagram after being enlarged at middle B;
[0036] Figure 11 Structure schematic diagram of the water supply device is shown. DETAILED DESCRIPTION
[0037] As Figures 1-11 shown, the utility model discloses a spinneret cleaning mechanism, it includes: body 1, set up in the water tank 2 of body 1 inside, cleaning structure 4 and positioning structure 3.
[0038] The cleaning structure 4 in the application is set to two groups and is arranged above and below the positioning structure 3 respectively. The positioning structure 3 includes: positioning through holes 31 arranged in a row and column form, and the spinneret to be cleaned is arranged in the positioning through holes 31; the cleaning structure 4 is based on y-direction driving structure 5 to realize horizontal reciprocating motion in the y-axis direction; and the positioning structure 3 is based on x-direction driving structure 6 to realize horizontal reciprocating motion in the x-axis direction.
[0039] The spinneret to be cleaned in the embodiment is a spinneret with a diameter of 26mm, and the mass is small, so if high-pressure water mist is used for flushing, the spinneret to be cleaned can easily run out of position. In the application, the spinneret to be cleaned is positioned by the positioning structure.
[0040] As Figures 5-10 shown, the positioning structure includes: a positioning plate 32 and a pressing plate 33; the positioning through holes 31 are formed on the positioning plate 32, the inner cavity of the positioning through holes 31 is a stepped cavity with a narrow lower part and a wide upper part, the outlet diameter of the positioning through holes 31 is smaller than the inlet diameter, and the diameter and depth of the inner cavity of the wider inlet part of the positioning through holes 31 are adapted to the shape and size of the spinneret to be cleaned. In order to place as many spinnerets to be cleaned as possible, the positioning through holes 31 in adjacent two rows on the positioning plate 33 are arranged alternately.
[0041] The pressing plate 33 includes: anti-falling through holes 34, the anti-falling through holes 34 are through holes with the same diameter from top to bottom, the diameter of the anti-falling through holes 34 is larger than the narrower outlet diameter of the positioning through holes 31 and smaller than the inlet diameter of the anti-falling through holes 34, and each anti-falling through hole 34 on the pressing plate 33 has a corresponding concentric positioning through hole 31 on the positioning plate 32. When the pressing plate 33 is placed on the positioning plate 32, each anti-falling through hole 34 can be concentric with and coincide with a positioning through hole 31 from top to bottom, can expose the part to be cleaned of the spinneret to be cleaned placed in the positioning through hole 31, so that the part to be cleaned can be cleaned by the water mist sprayed by the nozzle 4 in the upward direction, and also can ensure that the spinneret to be cleaned placed in the positioning through hole 31 will not fall off from above.
[0042] Mounting screw holes are simultaneously provided at corresponding positions on the pressure plate 33 and the positioning plate 32, respectively designated as the first screw hole 35 and the second screw hole 36. To ensure accurate positioning, the diameter of the first screw hole 35 on the pressure plate 33 is larger than that of the second screw hole 36, ensuring that the position of the second screw hole 36 can be clearly seen through the first screw hole 35 when the pressure plate 33 and the positioning plate 32 are tightened and positioned by bolts. Figure 5 and Figure 10 As shown, the green lines represent the structure on the pressure plate 33, and the black lines represent the structure on the positioning plate 32.
[0043] In practical use, the spinneret to be cleaned is placed into the positioning through-hole 31. Because the outlet diameter is narrow, the spinneret will not fall off from the bottom of the positioning through-hole 31. Then, the pressure plate 33 is placed on top of the positioning plate 32 to prevent the spinneret from falling off. After aligning the centers of each pair of positioning through-holes 31 and anti-detachment through-holes 34, the pressure plate 33 and the positioning plate 32 are tightened and positioned using bolts through the mounting screw holes. This application ensures that the spinneret to be cleaned placed in the positioning through-hole 31 can be cleaned in both the upper and lower directions through the positioning structure 3, while preventing it from falling off due to the scouring of high-pressure water mist from both directions.
[0044] like Figure 6 As shown, a coordinate axis is constructed with the lower left corner of the positioning plate 32 in the positioning structure 3 as the origin 0. In this embodiment, two sets of nozzles 4 are set in the cleaning structure 4 along the y-axis, and multiple positioning through holes 31 are set in each column along the y-axis in the positioning structure 3. The y-axis driving structure 5 drives the cleaning structure 4 to clean the spinneret in the positioning holes 31 along the y-axis. In the default position, the two sets of nozzles, a total of four nozzles 4, simultaneously clean the lower positioning through holes 31. In this embodiment, two nozzles 41 are set in the y-axis direction, a total of four. The position between the upper and lower sets of nozzles, located within the round-trip stroke of the upper nozzle in the y-axis direction, is set as the cleaning station.
[0045] The nozzle 4 moves back and forth at a preset speed, cleaning the spinnerets to be cleaned at the cleaning station during the movement. The x-axis drive structure 6 moves along the x-axis with the positioning structure 3, and moves to the cleaning station at a preset distance or frequency, ensuring that all the spinnerets to be cleaned in the positioning through holes 31 on all rows and columns of the positioning structure can be thoroughly cleaned.
[0046] like Figure 1 , Figure 2 and Figure 3As shown, the cleaning structure 4 includes a nozzle 41 and a high-pressure water pipe 42. The nozzle 41 is connected to the high-pressure water pipe 42 via a pipe 43, and the high-pressure water pipe 42 is connected to the water supply device 7 via a flexible hose (not marked in the figure). The spray direction of the nozzles 41 in both the upper and lower directions is towards the positioning structure 3. The nozzles 41 are 1.0mm fan-shaped nozzles, providing uniform and high-speed spray. The pipes 43 are arranged along the y-axis direction, and the specific number of nozzles 41 arranged along the y-axis direction on each pipe 43 is set according to actual needs.
[0047] The y-axis drive structure 5 includes: a y-axis drive motor 51, a y-axis lead screw 52, a connecting frame 53, and a cleaning connection structure. The y-axis drive motor 51 is mounted on a support frame 51, and its output shaft is connected to the y-axis lead screw 52. The connecting frame 53 is U-shaped, with two open ends positioned along the y-axis direction and facing the positioning structure 3. The middle of the U-shape is threaded onto the y-axis lead screw 52. Each of the two open ends of the U-shape is connected to a cleaning structure 4. Figure 3 As shown, the two horizontal bars of the connecting frame 53 are connected to the pipe 43.
[0048] like Figure 3 and Figure 2 As shown, the cleaning connection structure includes: a horizontally arranged track support 54, a Y-axis track plate 55, first rollers 56, and a roller frame 57; the Y-axis track plate 55 is mounted on the track support 54; the roller frame 57 is U-shaped. Two vertically arranged first rollers 56 form a group, with the roller axle of each first roller 56 mounted on the vertical side of the roller frame 57. The two groups of rollers are symmetrically mounted vertically on the Y-axis track plate 55. Two first rollers 56 in the same group are symmetrically positioned above and below the Y-axis track plate 55, respectively. The cleaning structure 4 carried on the roller frame 57 is rolled onto the Y-axis track plate 55 via the two vertically arranged first rollers 56. The roller frame 57 can carry the four first rollers 56 mounted on it, achieving horizontal rolling on the Y-axis track plate 55. Figure 3 In order to clearly show the structure of the nozzle below, the related structures such as the roller 56 below are omitted.
[0049] The end plate of the roller frame 57 is connected to the pipe 43. The horizontal edge of the roller frame 57 above the positioning structure 3 faces downward, and the horizontal edge of the roller frame 57 below the positioning structure 3 faces upward. The upper track bracket 54 is fixed above the water tank 2 in the machine body 1 by a bracket. The lower track bracket 54 is installed at the bottom of the water tank 2.
[0050] When the y-axis driving motor 51 is started, it drives the y-axis screw rod 52 to rotate, and the connecting frame 53 connected to the y-axis screw rod 52 based on the thread moves horizontally along the y-axis screw rod 52. The two cross bars of the connecting frame 53 carry the pipeline 43, the nozzle 41 and the roller frame 57 to move horizontally along the y-axis rail half 55 based on the first roller 56.
[0051] The x-direction driving structure 6 comprises an x-axis driving motor 61, an x-axis screw rod 62, an x-axis rail 63, a resting frame 64 and a nut sleeve 65.
[0052] The two x-axis screw rods 62 are horizontally arranged in parallel, and the x-axis screw rods 62 are connected to the output end of the x-axis driving motor 61.
[0053] The two x-axis rails 63 are arranged in parallel between the two x-axis screw rods 62; the two resting frames 64 are arranged above the x-axis rails 63 in parallel; the bottom of the resting frame 64 is provided with a supporting roller 69 which is rotatably installed on the x-axis rail 63; the nut sleeve 65 is arranged outside the supporting roller 69 below the resting frame 64 and is connected to the x-axis screw rod 62 based on the thread. In specific implementation, the x-axis rail 63 is installed in the sink through the bottom support 12.
[0054] The distance between the two resting frames 64 is less than the width of the positioning structure 3, so that the positioning structure 3 can be placed on the two resting frames 64, and the positioning through hole 31 on the positioning structure 3 can be suspended and can be washed by the water mist sprayed by the nozzle 41 in the up-down direction; the length of the x-axis rail 63 is sufficient to support each column of positioning through holes 31 on the positioning structure 3 to pass through the washing area of the nozzle 41. In specific implementation, the x-axis rail 63 is connected to the feeding device and the discharging device (not marked in the figure) at the front and back.
[0055] In specific implementation, an independent x-axis driving motor 61 can be configured for each x-axis screw rod 62, as long as the two x-axis driving motors 61 are synchronized to drive the two x-axis screw rods 62. In the embodiment, in order to reduce the system cost and ensure the driving synchronization, one x-axis driving motor 61 is configured for the two x-axis screw rods 62.
[0056] The x-direction driving structure 6 further comprises a connecting shaft 66, a driving bevel gear 67 and a driven bevel gear 68; the power transmission between the connecting shaft 66 and the x-axis driving motor 61 which are perpendicular to each other is realized through the cooperation of the driving bevel gear 67 and the driven bevel gear 68. The connecting shaft 66 is connected to the output end of the x-axis driving motor 61; one driven bevel gear 68 is arranged on each of the two x-axis screw rods 62; the connecting shaft 66 is arranged in the y-axis direction, and one driving bevel gear 67 is arranged on the connecting shaft 66 at a position symmetrical to the two x-axis screw rods 62; each driving bevel gear 67 is meshed and connected to one driven bevel gear 68.
[0057] After the x-axis driving motor 61 is started, the connecting shaft 66 is rotated, the two driving bevel gears 67 on the connecting shaft 66 drive the driven bevel gears 68 engaged with the driving bevel gears 67 to rotate, and then the two x-axis lead screws 62 are synchronously rotated. The nut sleeve 65 sleeved on the x-axis lead screw 62 drives the support frame 64 fixedly connected with the nut sleeve 65 to move in the x direction based on the supporting roller 69 along the x-axis rail 63, and then the positioning structure 3 placed on the support frame 64 is horizontally moved in the x direction.
[0058] The water supply device 7 is also included in the present application, and high-pressure water supply is realized through a plunger pump. Figure 11 As shown in the figure, the plunger pump 73 is driven by the water supply motor 72 to provide high-pressure water for the system. The water tank 71 is connected to an external water source through the water inlet 74. The drain pipe 21 is arranged below the water tank 2 to guide the wastewater generated after washing into a wastewater treatment device (not marked in the figure). In specific implementation, each water pump is responsible for two spray heads. The water pump pressure is displayed through a pressure gauge, and a pneumatic electromagnetic valve is arranged at the water inlet to control the water inlet on-off.
[0059] After the technical scheme of the utility model is used, the to-be-cleaned spinnerets are placed into the positioning holes 31 of the positioning plate 32, the pressing plate 33 is placed above the positioning plate 32 after all the positioning holes 31 in the positioning plate 32 are filled with the to-be-cleaned spinnerets, and the positioning plate 32 and the pressing plate 33 are fixed through bolts. The positioning structure 3 filled with the to-be-cleaned spinnerets is placed between the two support frames 64, and the feeding of the to-be-cleaned spinnerets is completed. The water supply device 7 is started to provide high-pressure water to the spray heads 41 through the high-pressure water pipes 42. The y-axis driving motor 51 is started to drive the connecting frame 53 to slowly move along the y-axis with the spray heads 41, and all the to-be-cleaned spinnerets in the same column are cleaned according to the preset number of times of reciprocation. After the x-axis driving motor 61 is started to drive the two x-axis lead screws 62 to rotate, the support frames 64 and the positioning structure 3 are moved along the x-axis direction by a preset distance to send the next column of to-be-cleaned spinnerets to the cleaning station between the upper and lower spray heads, the y-axis driving motor continues to clean the to-be-cleaned spinnerets on the cleaning station according to the preset number of times of reciprocation, and the cleaning of the to-be-cleaned spinnerets in the positioning structure 3 is completed through repeated operations.
Claims
1. A spinneret cleaning machine, comprising: The cleaning structure and the positioning structure are characterized in that the cleaning structure is configured as two sets, respectively disposed above and below the positioning structure; The positioning structure includes: positioning through holes arranged in a row and column pattern, with the spinneret to be cleaned disposed in the positioning through holes; The cleaning structure achieves horizontal reciprocating motion in the y-axis direction based on the y-direction driving structure; the positioning structure achieves horizontal reciprocating motion in the x-axis direction based on the x-direction driving structure.
2. The spinneret cleaning machine according to claim 1, characterized in that: The cleaning structure includes a nozzle and a high-pressure water pipe, wherein the nozzle is connected to the high-pressure water pipe; the spray direction of the nozzle is towards the positioning structure.
3. The spinneret cleaning machine according to claim 2, characterized in that: The nozzle is a fan-shaped nozzle.
4. The spinneret cleaning machine according to claim 1, characterized in that: The y-axis drive structure includes: a y-axis drive motor, a y-axis lead screw, a connecting frame, and a cleaning connection structure; The output shaft of the y-axis drive motor is connected to the y-axis lead screw. The connecting frame is U-shaped, with two open ends set along the y-axis direction and facing the positioning structure. The middle of the U-shape is threaded and fitted onto the y-axis lead screw. The two open ends of the U-shape are respectively connected to one of the cleaning structures.
5. The spinneret cleaning machine according to claim 4, characterized in that: The cleaning connection structure includes: a horizontally arranged track support, a Y-axis track plate, first rollers, and a roller frame; the Y-axis track plate is mounted on the track support; the roller frame is U-shaped, with two vertically arranged first rollers forming a group, and the two groups of first rollers are symmetrically mounted on the Y-axis track plate based on the two vertical sides of the roller frame, with two first rollers in the same group symmetrically arranged above and below the Y-axis track plate; the end plate of the roller frame connects to the cleaning structure.
6. The spinneret cleaning machine according to claim 1, characterized in that: The x-axis drive structure includes: an x-axis drive motor, an x-axis lead screw, an x-axis track, a support frame, and a nut sleeve; Two x-axis lead screws are arranged in parallel, and the x-axis lead screws are connected to the output end of the x-axis drive motor; Two x-axis tracks are arranged parallel to each other between two x-axis lead screws; two shelves are arranged parallel to each other above the x-axis tracks; support rollers are provided at the bottom of the shelves, and the support rollers are rotatably mounted on the x-axis tracks; a nut sleeve is provided below the shelf and outside the support rollers, and the nut sleeve is threadedly fitted onto the x-axis lead screws; The distance between the two shelves is less than the width of the positioning structure.
7. The spinneret cleaning machine according to claim 6, characterized in that: The x-axis drive structure further includes: a connecting shaft, a driving bevel gear, and a driven bevel gear; The connecting shaft is connected to the output end of the x-axis drive motor; Each of the two x-axis lead screws is provided with a driven bevel gear; the connecting shaft is arranged in the y-axis direction, and a driving bevel gear is provided on the connecting shaft at a position symmetrical to the two x-axis lead screws, with each driving bevel gear meshing with a driven bevel gear.
8. The spinneret cleaning machine according to claim 1, characterized in that: The positioning structure includes: a positioning plate and a pressure plate; The positioning through hole is provided on the positioning plate. The inner cavity of the positioning through hole is a stepped cavity that is narrower at the bottom and wider at the top. The outlet diameter of the positioning through hole is smaller than the inlet diameter. The diameter and depth of the inner cavity at the wider inlet of the positioning through hole are adapted to the shape and size of the spinneret to be cleaned. The pressure plate includes: an anti-detachment through hole, which is a through hole with the same upper and lower diameters. The diameter of the anti-detachment through hole is larger than the narrower outlet diameter of the positioning through hole, and smaller than the inlet diameter of the anti-detachment through hole. Each of the anti-detachment holes on the pressure plate has a corresponding concentric positioning through hole on the positioning plate.
9. A spinneret cleaning machine according to claim 8, characterized in that: The positioning through holes in adjacent rows on the positioning plate are arranged alternately.
Citation Information
Patent Citations
Spinneret plate high-pressure washing machine
CN209428645U