A highly sealed large plate engraving copper fixture
The high-sealing copper jig for large plate engraving, designed with magnetic steel adsorption and multi-layer sealing rings, combined with motor drive and sensor detection, solves the problem of sealing failure, achieves a long life of the sealing component and improves the cleaning efficiency, and meets the precision processing requirements of large plates under vacuum conditions.
Patent Information
- Application Number
- CN202511100196.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-07
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2045-08-07
AI Technical Summary
The existing high-sealing large-plate engraving copper jig is sealed by locking screws. After long-term use, the threads are prone to failure, resulting in sealing failure, and the jig needs to be replaced frequently, resulting in cost waste.
It adopts magnetic steel adsorption and multi-layer sealing ring design, combined with a motor-driven rotating rod and a sensor to detect the flatness of the rubber interlayer to ensure the sealing effect. After sealing, cleaning fluid is sprayed through the water pump system, and the circulating water pump is used to recover and reuse the cleaning fluid to enhance the cleaning effect. The cleaning force is improved through the guide pipe groove design.
Extend the replacement cycle of sealing components, reduce manual debugging time, reduce equipment failure rate, improve cleaning efficiency, reduce resource consumption, ensure workshop safety, and meet the precision processing needs of large panels under vacuum conditions.
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Figure CN120613296B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of large plate manufacturing, in particular to a large plate engraving copper jig with high sealing performance. Background Art
[0002] Large-board, that is, an advanced packaging process that realizes fan-out wiring within a large area, is based on wafer-level packaging technology. Taking into account the wafer size limitations and low packaging utilization rate, it develops and applies large-size panels as carriers before chip plastic packaging. It reduces the cost of single products by increasing production capacity. Chip reconstruction, epoxy resin plastic packaging, and high-density redistribution layer production precision processes can be carried out on it.
[0003] Due to the indispensable and special usage properties of large panels, they are widely cited in the market. At the same time as the large demand, large panels need to be mass-produced and standardized. In order to better ensure the quality of large panels during the manufacturing process and to clean the large panels, a highly sealed large panel engraving copper jig is needed.
[0004] However, the existing large plate engraving copper fixture with high sealing performance has the following shortcomings:
[0005] The existing operation for sealing the product is to seal it by locking the screws. However, this method will cause the threads of the fixture to fail if it is disassembled for a long time, and even the seal will fail. At this time, the fixture needs to be replaced frequently, which leads to a great waste of costs.
[0006] Therefore, we proposed a large-plate engraving copper fixture with high sealing performance to solve the above problems. Summary of the Invention
[0007] The object of the present invention is to provide a large plate engraving copper jig with high sealing performance. When the jig is working, the large plate is first placed in the placement groove of the jig bottom plate and the jig cover is covered. At this time, the bottom plate magnetic steel and the top plate magnetic steel are attracted to each other, and the outer sealing ring, the inner sealing ring and the upper sealing ring are synchronously squeezed by the jig bottom plate and the jig cover. At the same time, the motor compartment is turned on to drive the rotating rod to rotate. When the rotating rod rotates, it drives the first distance sensor and the second distance sensor to detect the surface flatness of the rubber interlayer and the jig cover in real time. After the jig bottom plate and the jig cover are engaged and sealed, the first water pump and the second water pump are started to circulate the cleaning liquid in the connected water pipes thereon to each nozzle and spray it out through the nozzle to the placement groove. At this time, the toggle wheel at the bottom of the placement groove is impacted and rotated. The cleaning liquid is recovered and processed by the circulating water pump and then returned to the first water pump and the second water pump for recycling. The head of the guide pipe groove is tilted downward to guide the cleaning liquid flowing through the connecting hole to the top surface of the large plate. The shock-absorbing plate absorbs the vibration of the equipment operation, and finally the cleaning and sealing of the large plate are achieved.
[0008] To achieve the above object, the present invention provides the following technical solution: a highly sealed large plate engraving copper jig, comprising a jig base plate, a sealing mechanism, and a cleaning mechanism, wherein the sealing mechanism is arranged on the top of the jig base plate, and the cleaning mechanism is arranged on the bottom of the jig base plate;
[0009] The sealing mechanism includes a bottom plate magnet, a top plate magnet, a first distance sensor and a rubber isolation layer. The bottom plate magnet is arranged on the top of the top plate magnet, the first distance sensor is arranged on the top of the rubber isolation layer, the bottom plate magnet is used to be adsorbed with the top plate magnet, and the first distance sensor is used to detect the height of the rubber isolation layer surface.
[0010] Preferably, the sealing mechanism also includes an outer sealing ring, which is installed on the top of the jig bottom plate, the inner side of the jig bottom plate is fixedly connected to the bottom plate magnet, an inner sealing ring is provided on the inner side of the bottom plate magnet, a jig cover is provided on the top of the jig bottom plate, the bottom of the jig cover is fixedly connected to the top plate magnet, an upper sealing ring is provided on the outer side of the top plate magnet, and the bottom plate magnet and the top plate magnet are arranged in corresponding positions.
[0011] Preferably, the upper sealing ring is located on the outside of the outer sealing ring, the rubber interlayer is located on the top of the fixture cover, a guide ring rail is installed on the top of the rubber interlayer, and a motor compartment is provided on the inner side of the guide ring rail.
[0012] Preferably, a rotating rod is installed at the output end of the motor compartment, a first distance sensor is installed at the bottom of the rotating rod, a second distance sensor is installed at the other end of the rotating rod, and a slider is installed at the bottom of the rotating rod.
[0013] Preferably, the slider is located between the first distance sensor and the second distance sensor, the slider is slidably connected to the guide ring rail, and a shock-absorbing plate is installed on the top of the fixture bottom plate.
[0014] Preferably, the cleaning mechanism includes a placement groove, which is arranged on the top of the shock-absorbing plate, and a placement column is provided on the inner side of the placement groove.
[0015] Preferably, a connecting hole is opened on the inner side of the placement groove, a toggle wheel is rotatably connected to the bottom of the placement groove, a guide pipe groove is installed on the inner wall of the placement groove, and a first water pump is provided at the bottom of the fixture base plate.
[0016] Preferably, the output end of the first water pump passes through the fixture bottom plate and the shock-absorbing plate and is connected to a water pipe, and the water pipe is located on the top of the shock-absorbing plate.
[0017] Preferably, the outside of the water pipe is connected to a plurality of nozzles, and the plurality of nozzles are respectively located on the outside of the corresponding placement grooves, and a second water pump is provided at the other end of the fixture bottom plate.
[0018] Preferably, a circulating water pump is provided in the middle of the bottom of the jig base plate, the input end of the circulating water pump passes through the jig base plate and the shock-absorbing plate, the output end of the circulating water pump is connected to the water tank parts of the first water pump and the second water pump, and a box cover is installed at the bottom of the jig base plate.
[0019] Compared with the prior art, the present invention has the following beneficial effects:
[0020] 1. The present invention places the large plate into the placement groove of the jig base plate and then covers the jig cover plate. At this time, the jig base plate magnet and the jig cover plate top plate magnet are attracted to each other, and the outer sealing ring, inner sealing ring and upper sealing ring are simultaneously squeezed by the jig base plate and the jig cover plate, forming a tightly sealed space between the jig base plate and the jig cover plate. At the same time, the motor compartment is turned on to drive the rotating rod to rotate. The rotating rod rotates while driving the first distance sensor and the second distance sensor to detect the surface flatness of the rubber interlayer and the jig cover plate in real time to ensure the sealing effect, thereby avoiding long-term disassembly through threads in this way, which may cause the jig threads to fail, and even the sealing to fail. At this time, the jig needs to be replaced frequently, resulting in a great waste of cost.
[0021] 2. After the jig bottom plate and the jig cover plate are engaged and sealed, the first water pump and the second water pump are started to circulate the cleaning liquid in the water pipes connected to the first water pump and the second water pump to each nozzle, and then sprayed out through the nozzle to the placement tank. At this time, the cleaning liquid in the jig is driven by the cleaning liquid sprayed by the nozzle to accelerate the flow speed, and the toggle wheel at the bottom of the placement tank is impacted and rotated. The rotating toggle wheel stirs the water flow, causing the water flow to be toggled and flow to the bottom of the large plate in the placement tank, thereby enhancing the cleaning effect. The cleaning liquid is recovered and processed by the circulating water pump and then returned to the first water pump and the second water pump for recycling, thereby enhancing the cleanliness of the cleaning liquid in the jig while reducing the use of cleaning liquid. In addition, the head of the guide pipe groove is tilted downward, so that the cleaning liquid flowing through the connecting hole is guided to the top surface of the large plate, increasing the force of the cleaning liquid flowing through the top surface of the large plate, further enhancing the cleaning effect of the large plate, and the shock-absorbing plate absorbs the vibration of the equipment operation, ensuring a safe and stable cleaning process, and ultimately achieving efficient cleaning and sealing protection of the large plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a three-dimensional diagram of the main structure of a large-plate engraved copper fixture with high sealing performance according to the present invention;
[0023] Figure 2 This is a disassembled three-dimensional diagram of the overall structure of a large plate engraving copper fixture with high sealing performance according to the present invention;
[0024] Figure 3 This is an exploded perspective view of the sealing mechanism in a large plate engraving copper fixture with high sealing performance according to the present invention;
[0025] Figure 4 This is a disassembled three-dimensional diagram of a cleaning mechanism in a highly sealed large-plate engraving copper jig of the present invention;
[0026] Figure 5 for Figure 4 A magnified view of point A in the figure;
[0027] Figure 6 This is a bottom view of a large-plate engraved copper fixture with high sealing performance according to the present invention.
[0028] In the figure: 1. fixture bottom plate; 201. outer sealing ring; 202. bottom plate magnet; 203. inner sealing ring; 204. fixture cover; 205. rubber interlayer; 206. top plate magnet; 207. upper sealing ring; 208. guide ring rail; 209. motor compartment; 210. rotating rod; 211. first distance sensor; 212. second distance sensor; 213. slider; 214. shock-absorbing plate; 301. placement slot; 302. box cover; 303. connecting hole; 304. guide pipe slot; 305. toggle wheel; 306. first water pump; 307. water pipe; 308. nozzle; 309. circulating water pump; 310. second water pump; 311. placement column. DETAILED DESCRIPTION
[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.
[0030] Example 1, according to Figure 1-Figure 3As shown, in order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large-plate engraved copper jig with high sealing performance, comprising a jig base plate 1, a sealing mechanism and a cleaning mechanism, the sealing mechanism being arranged at the top of the jig base plate 1, and the cleaning mechanism being arranged at the bottom of the jig base plate 1, the sealing mechanism comprising a base plate magnet 202, a top plate magnet 206, a first distance sensor 211 and a rubber interlayer 205, the base plate magnet 202 being arranged at the top of the top plate magnet 206, the first distance sensor 211 being arranged at the top of the rubber interlayer 205, the base plate magnet 202 being used for mutual adsorption with the top plate magnet 206, the first distance sensor 211 being used for detecting the surface height of the rubber interlayer 205, the sealing mechanism also comprising an outer sealing ring 201, the outer sealing ring 201 being arranged at the top of the jig base plate 1, the inner side of the jig base plate 1 being fixedly connected to the base plate magnet 202, the inner side of the base plate magnet 202 being provided with an inner sealing ring 203, and the top of the jig base plate 1 being provided with a A jig cover 204 is provided, the bottom of the jig cover 204 is fixedly connected to the top plate magnet 206, an upper sealing ring 207 is provided on the outside of the top plate magnet 206, the bottom plate magnet 202 and the top plate magnet 206 are provided at corresponding positions, the upper sealing ring 207 is located on the outside of the outer sealing ring 201, the rubber interlayer 205 is located on the top of the jig cover 204, a guide ring rail 208 is provided on the top of the rubber interlayer 205, and a motor compartment 2 is provided on the inner side of the guide ring rail 208. 09. A rotating rod 210 is installed at the output end of the motor compartment 209, a first distance sensor 211 is installed at the bottom of the rotating rod 210, a second distance sensor 212 is installed at the other end of the rotating rod 210, a slider 213 is installed at the bottom of the rotating rod 210, the slider 213 is located between the first distance sensor 211 and the second distance sensor 212, the slider 213 is slidably connected to the guide ring rail 208, and a shock-absorbing plate 214 is installed on the top of the fixture base plate 1.
[0031] The effect achieved by the entire embodiment 1 is as follows: when the jig is in operation, the large plate is first placed steadily in the placement groove 301 of the jig bottom plate 1, and then the jig cover 204 is covered. The bottom plate magnet 202 and the top plate magnet 206 are immediately attracted to each other by magnetism, and the outer sealing ring 201, the inner sealing ring 203 and the upper sealing ring 207 are tightly fitted under the pressure of the cover and the bottom plate, thereby forming a sealed space. At the same time, the motor compartment 209 drives the rotating rod 210 to rotate at a constant speed, driving the first distance sensor 211 and the second distance sensor 212 to rotate in real time. Scan the surface of the rubber interlayer 205 and the fixture cover 204 to accurately monitor the flatness, continuously ensure the sealing effect, and complete the sealing process. The outer sealing ring 201, the inner sealing ring 203 and the upper sealing ring 207 bear the extrusion stress in layers to avoid excessive wear of a single component and extend the replacement cycle of the sealing assembly. The magnetic steel adsorption of the bottom plate and the cover plate can achieve fast and accurate alignment, reducing manual debugging time. The shock-absorbing plate 214 absorbs the vibration generated by the rotation of the motor and the impact of water flow, reducing the equipment failure rate, while reducing noise and ensuring safe workshop operation.
[0032] Example 2, according to Figure 2-Figure 6 As shown, the cleaning mechanism includes a placement groove 301, which is arranged on the top of the shock-absorbing plate 214, a placement column 311 is opened on the inner side of the placement groove 301, a connecting hole 303 is opened on the inner side of the placement groove 301, and a toggle wheel 305 is rotatably connected to the bottom of the placement groove 301. A guide pipe groove 304 is installed on the inner wall of the placement groove 301, and a first water pump 306 is provided at the bottom of the fixture bottom plate 1. The output end of the first water pump 306 passes through the fixture bottom plate 1 and the shock-absorbing plate 214 and is connected to a water pipe 307. The water pipe 307 is located at At the top of the shock-absorbing plate 214, the outside of the water pipe 307 is connected to multiple nozzles 308, and the multiple nozzles 308 are respectively located on the outside of the corresponding placement grooves 301. A second water pump 310 is provided at the other end of the jig base plate 1, and a circulating water pump 309 is provided in the middle of the bottom of the jig base plate 1. The input end of the circulating water pump 309 passes through the jig base plate 1 and the shock-absorbing plate 214, and the output end of the circulating water pump 309 is connected to the water tank parts of the first water pump 306 and the second water pump 310. A box cover 302 is installed at the bottom of the jig base plate 1.
[0033] The effect achieved by the entire embodiment 2 is as follows: the first water pump 306 and the second water pump 310 are started synchronously, driving the cleaning liquid in the water pipe 307 to be pressurized and sprayed into the placement tank 301 through the nozzle 308, and the enhanced water flow directly flushes the surface of the large plate, and accelerates the flow of the original cleaning liquid in the fixture, impacting the toggle wheel 305 at the bottom of the placement tank 301 to rotate at high speed, stirring the water flow to cover the bottom of the large plate in all directions, and the circulating water pump 309 operates synchronously to recycle and purify the used cleaning liquid, and re-inject it into the water pump for recycling, which not only improves the cleanliness of the cleaning liquid, but also reduces resource consumption. The two water pipes 307 form a ring shape inside the fixture bottom plate 1 through their own shape, and the cleaning liquid sprayed by each nozzle 308 through the regularly arranged nozzles 308 thereon forms a rotating water flow inside the fixture bottom plate 1, so that The cleaning liquid enhances the flushing force on the surface of the large plate. In addition, the unique design of the downward tilt of the head of the guide tube groove 304 guides the cleaning liquid in the connecting hole 303 to concentrate on flushing the top of the large plate, further enhancing the cleaning force, and the shock-absorbing plate 214 effectively absorbs the vibration generated by the operation of the equipment, ensuring the safety and stability of the entire cleaning process, and finally completing the sealing and cleaning operation of the large plate efficiently. The high sealing design of the magnetic steel adsorption and the multi-layer sealing ring can be used to extract the internal air after the fixture is sealed to form a vacuum environment, which meets the coating and photolithography precision processing requirements of the large plate under vacuum conditions, avoids external impurity contamination and oxidation risks, and utilizes the sealing characteristics of the sealing mechanism to fill the interior of the fixture with a certain pressure of gas or liquid, and monitor the deformation data of the rubber interlayer 205 and the sealing surface through the first distance sensor 211 and the second distance sensor 212.
[0034] The working principle of the whole equipment is as follows: when this high-sealing large plate engraving copper jig is working, the large plate is first placed in the placement groove 301 of the jig bottom plate 1, and the jig cover 204 is covered. At this time, the bottom plate magnet 202 and the top plate magnet 206 are attracted to each other, and the outer sealing ring 201, the inner sealing ring 203 and the upper sealing ring 207 are squeezed by the jig bottom plate 1 and the jig cover 204 at the same time, so that a tight sealing space is formed between the jig bottom plate 1 and the jig cover 204. At the same time, the motor compartment 209 is turned on to drive the rotating rod 210 to rotate. When the rotating rod 210 rotates, it drives the first distance sensor 211 and the second distance sensor 212 to detect the surface flatness of the rubber interlayer 205 and the jig cover 204 in real time to ensure To improve the sealing effect, after the fixture bottom plate 1 and the fixture cover plate 204 are engaged and sealed, the first water pump 306 and the second water pump 310 are started, and the cleaning liquid in the connected water pipe 307 is circulated to each nozzle 308, and sprayed out through the nozzle 308 to rush to the placement tank 301. At this time, the cleaning liquid in the fixture is driven by the cleaning liquid sprayed by the nozzle 308 to accelerate the flow speed. At this time, the toggle wheel 305 at the bottom of the placement tank 301 is impacted and rotated. The rotating toggle wheel 305 stirs the water flow, so that the water flow is toggled to the bottom of the large plate in the placement tank 301, thereby enhancing the cleaning effect. The cleaning liquid is recovered by the circulating water pump 309 and then returned to the first water pump 306 and the second water pump 310 for recycling, thereby enhancing the treatment effect. The cleanliness of the cleaning liquid in the fixture is improved while reducing the use of cleaning liquid. Two water pipes 307 are arranged in a circular shape inside the fixture bottom plate 1. The nozzles 308 are regularly arranged on the water pipes 307. After the cleaning liquid is sprayed from the nozzles 308, a rotating water flow is formed inside the fixture bottom plate 1, thereby enhancing the scouring force on the surface of the large plate. The head of the guide pipe groove 304 is tilted downward, thereby guiding the cleaning liquid flowing through the connecting hole 303 to the top surface of the large plate, enhancing the force of the cleaning liquid flowing through the top surface of the large plate, and further enhancing the cleaning force of the large plate. The shock-absorbing plate 214 absorbs the vibration of the equipment operation, ensuring the safety and stability of the cleaning process, and finally achieving efficient cleaning and sealing protection of the large plate. The toggle wheel 305 at the bottom of the groove 301 is placed After being impacted by the cleaning liquid, it rotates and can guide the water flow to the bottom of the large plate. Combined with the inclined design of the top guide pipe groove 304, it forms a two-way flushing up and down, avoiding cleaning dead corners, and making the surface and corners of the large plate clean more evenly. The circulating water pump 309 recycles the used cleaning liquid and returns it to the water pump, reducing the amount of new liquid. At the same time, the liquid cleanliness is improved through filtration treatment, the service life is extended, and it is more in line with environmental protection production requirements. The enclosed space formed by the multi-layer sealing ring can prevent the cleaning liquid from volatilizing or splashing during high-pressure injection, avoiding waste and reducing chemical pollution in the workshop environment. After the cleaning liquid is recovered and filtered, the deposition of metal ions or particulate matter in the water on the inner wall of the fixture can be reduced, reducing the risk of pipeline blockage and reducing maintenance frequency.
[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A large plate engraving copper jig with high sealing performance, comprising a jig base plate (1), a sealing mechanism and a cleaning mechanism, characterized in that: The sealing mechanism is arranged on the top of the jig base plate (1), and the cleaning mechanism is arranged on the bottom of the jig base plate (1); The sealing mechanism comprises a bottom plate magnet (202), a top plate magnet (206), a first distance sensor (211) and a rubber interlayer (205), wherein the bottom plate magnet (202) is arranged on top of the top plate magnet (206), the first distance sensor (211) is arranged on top of the rubber interlayer (205), the bottom plate magnet (202) is used to be mutually adsorbed with the top plate magnet (206), and the first distance sensor (211) is used to detect the height of the surface of the rubber interlayer (205); The sealing mechanism further comprises an outer sealing ring (201), the outer sealing ring (201) being arranged on the top of the jig base plate (1), the inner side of the jig base plate (1) being fixedly connected to the base plate magnet (202), the inner side of the base plate magnet (202) being provided with an inner sealing ring (203), the top of the jig base plate (1) being provided with a jig cover plate (204), the bottom of the jig cover plate (204) being fixedly connected to the top plate magnet (206), the outer side of the top plate magnet (206) being provided with an upper sealing ring (207), and the base plate magnet (202) and the top plate magnet (206) being arranged at corresponding positions.
2. The highly sealed large plate engraving copper fixture according to claim 1, characterized in that: The upper sealing ring (207) is located outside the outer sealing ring (201), the rubber interlayer (205) is located on the top of the jig cover (204), a guide ring rail (208) is installed on the top of the rubber interlayer (205), and a motor compartment (209) is provided on the inner side of the guide ring rail (208).
3. The highly sealed large plate engraving copper fixture according to claim 2, characterized in that: A rotating rod (210) is installed at the output end of the motor compartment (209), a first distance sensor (211) is installed at the bottom of the rotating rod (210), a second distance sensor (212) is installed at the other end of the rotating rod (210), and a slider (213) is installed at the bottom of the rotating rod (210).
4. The highly airtight large plate engraving copper fixture according to claim 3, characterized in that: The slider (213) is located between the first distance sensor (211) and the second distance sensor (212), the slider (213) is slidably connected to the guide ring rail (208), and a shock-absorbing plate (214) is installed on the top of the fixture base plate (1).
5. The highly airtight large plate engraving copper fixture according to claim 1, characterized in that: The cleaning mechanism comprises a placement groove (301), the placement groove (301) is arranged on the top of the shock-absorbing plate (214), and a placement column (311) is provided on the inner side of the placement groove (301).
6. The highly airtight large plate engraving copper fixture according to claim 5, characterized in that: A communicating hole (303) is provided on the inner side of the placement groove (301), a toggle wheel (305) is rotatably connected to the bottom of the placement groove (301), a guide pipe groove (304) is provided on the inner wall of the placement groove (301), and a first water pump (306) is provided at the bottom of the fixture base plate (1).
7. The highly airtight large plate engraving copper fixture according to claim 6, characterized in that: The output end of the first water pump (306) passes through the fixture bottom plate (1) and the shock-absorbing plate (214) and is connected to a water pipe (307), and the water pipe (307) is located on the top of the shock-absorbing plate (214).
8. The highly airtight large plate engraving copper fixture according to claim 7, characterized in that: The outside of the water pipe (307) is connected to a plurality of nozzles (308), and the plurality of nozzles (308) are respectively located outside the corresponding placement grooves (301). A second water pump (310) is provided at the other end of the fixture base plate (1).
9. The highly airtight large plate engraving copper fixture according to claim 1, characterized in that: A circulating water pump (309) is provided in the middle of the bottom of the jig base plate (1), an input end of the circulating water pump (309) passes through the jig base plate (1) and the shock-absorbing plate (214), an output end of the circulating water pump (309) is connected to the water tank parts of the first water pump (306) and the second water pump (310), and a box cover (302) is installed at the bottom of the jig base plate (1).
Citation Information
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