A nitrogen-passing mold with multiple holes and a nitrogen-passing method thereof

Abstract

The present invention discloses a nitrogen-passing die with multiple holes and a nitrogen-passing method thereof, which comprises an aluminum extrusion die, wherein the aluminum extrusion die comprises a die main body, a molding cavity is provided on the die main body, a plurality of nitrogen injection grooves connected to the molding cavity are also provided on the die main body, an annular groove connected to the nitrogen injection groove is provided on the die main body, a connecting channel connected to the annular groove is provided on the die main body, a bend is installed inside the die main body, one end of the bend is connected to the connecting channel, and the other end of the bend passes through the outside of the die main body. The technical problem to be solved by the present invention is that the existing nitrogen-passing die is not convenient for precise control of the liquid nitrogen flow rate during use, which easily leads to large fluctuations in the temperature of the aluminum profile when it is ejected from the die, uneven cooling, and affects the dimensional stability and mechanical properties of the aluminum profile.

Description

Technical Field

[0001] The invention relates to the technical field of extruded workpieces, in particular to a nitrogen-passing die with multiple holes in one die and a nitrogen-passing method thereof. Background Art

[0002] A multi-hole nitrogen-filled die is a type of aluminum extrusion die. The aluminum extrusion die system using liquid nitrogen cooling is an advanced manufacturing process technology, mainly used in the production process of aluminum profiles. The system achieves efficient cooling by directly spraying a small amount of liquid nitrogen into the extrusion die. The key advantage of this technology is that it can significantly increase the extrusion speed without sacrificing product quality. A multi-hole nitrogen-filled die refers to a profile that allows multiple profiles with internal through holes to be formed in a single extrusion process.

[0003] During the extrusion process of aluminum profiles, the mold will heat up due to the heat generated by the deformation of the material, which may cause problems such as overheating of the profile surface, oxidation, and accelerated mold wear. Through the extremely low temperature of liquid nitrogen (about -196°C), the system can quickly absorb and take away a large amount of heat from the mold. Liquid nitrogen is introduced into key parts of the mold, such as the grooves of the mold pad, through specially designed pipes or terminal equipment, forming a closed-loop control system to ensure that the mold temperature is maintained at 440~480℃. After completing the cooling task, liquid nitrogen will be converted into gaseous nitrogen. This inert gas can effectively isolate oxygen and prevent oxidation of aluminum profiles at high temperatures, which helps to improve the surface finish and rust resistance of the product.

[0004] A cooling mechanism for an aluminum extrusion die with Chinese patent application number 201810467505.7 includes a die and a die pad of an aluminum extrusion die, wherein a cooling water channel and a nitrogen channel are arranged in the die pad, the cooling water channel is connected to a cooling water circulation system, the nitrogen channel is connected to a nitrogen inlet pipe, and the nitrogen channel is connected to an extrusion cavity of the extrusion die; the nitrogen channel and the cooling water channel are both arranged in a direction perpendicular to the axis of the extrusion die, and the nitrogen channel is located on a side close to the die, and the cooling water channel is located on a side away from the die. The aluminum extrusion die cooling method in this scheme uses cooling water and room temperature nitrogen to replace liquid nitrogen for die cooling, which has low use cost, good cooling effect and protection effect, and can improve the extrusion speed of the profile and the quality of the aluminum profile.

[0005] During the use of the existing nitrogen-filled mold, it is not convenient to accurately control the flow rate of liquid nitrogen, which can easily lead to large temperature fluctuations of the aluminum profile out of the mold and uneven cooling, affecting the dimensional stability and mechanical properties of the aluminum profile. Summary of the invention

[0006] The technical problem to be solved by the present invention is that the existing nitrogen-filled mold is not convenient for accurately controlling the flow rate of liquid nitrogen during use, which easily leads to large temperature fluctuations of the aluminum profile out of the mold and uneven cooling, affecting the dimensional stability and mechanical properties of the aluminum profile.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a nitrogen-permeable mold with multiple holes in one mold, comprising:

[0008] An aluminum extrusion die, the aluminum extrusion die comprising a die main body, a forming cavity is formed on the die main body, a plurality of nitrogen injection grooves connected to the forming cavity are formed on the die main body, an annular groove connected to the nitrogen injection groove is formed on the die main body, a connecting channel connected to the annular groove is formed on the die main body, a bend is installed inside the die main body, one end of the bend is connected to the connecting channel, and the other end of the bend passes through the outside of the die main body;

[0009] A nitrogen supply mechanism, the nitrogen supply mechanism comprising a liquid nitrogen component, a liquid outlet of the liquid nitrogen component is connected to a decompression reflux component, a liquid outlet of the decompression reflux component is connected to a flow regulating component, and the flow regulating component is connected to a bend pipe;

[0010] A nitrogen recovery component, the nitrogen recovery component comprising a hollow annular sleeve sleeved on the surface of the mold body, the surface of the hollow annular sleeve is connected to a recovery pipe, the surface of the recovery pipe is connected to a joint, and the top of the recovery pipe is fixedly connected to a recovery tank;

[0011] The detection mechanism comprises a fixing frame installed on the surface of the mold body.

[0012] Preferably, the liquid nitrogen assembly comprises a liquid nitrogen tank, the top of the liquid nitrogen tank is connected to a manual valve, the top of the manual valve is connected to a liquid nitrogen pump, and a mounting seat is provided on the bottom fixed sleeve of the liquid nitrogen tank;

[0013] The decompression reflux assembly includes a reflux pipe connected to the liquid inlet end of the manual valve, a connecting pipe connected to the top of the reflux pipe, the connecting pipe is connected to the liquid outlet end of the liquid nitrogen pump, and the liquid outlet end of the reflux pipe is connected to a pressure reducing valve;

[0014] The flow regulating assembly comprises a shell, and the surface of the shell is respectively connected with an air outlet pipe and a liquid inlet pipe, the liquid inlet pipe is connected with the liquid outlet end of the pressure reducing valve, and the air outlet pipe is connected with the joint.

[0015] Preferably, wherein: a sliding seat is fixedly connected to the inner wall of the reflux pipe, a moving head is movably connected inside the sliding seat, one end of the moving head is fixedly connected to a rod body, a limit piece is movably sleeved on the surface of the rod body, the limit piece is fixedly connected to the inner wall of the reflux pipe, a plurality of reflux grooves are formed around the surface of the limit piece, a spring is movably sleeved on the surface of the rod body, and the spring is located on the side opposite to the sliding seat and the limit piece.

[0016] Preferably, an inclined plate is fixedly connected to the top of the inner wall of the shell, the air outlet pipe is located at the top of the inclined plate, the liquid inlet pipe is located at the bottom of the inclined plate, a separation pipe is fixedly connected to the center of the inclined plate, and a spiral diversion blade is fixedly connected to the surface of the separation pipe.

[0017] Preferably, the four corners of the top of the shell are fixedly connected with hydraulic cylinders, the top of the hydraulic cylinder is fixedly connected with a lifting plate, the bottom center of the lifting plate is fixedly connected with a plugging head, and the bottom of the plugging head penetrates into the inner cavity of the shell.

[0018] Preferably, wherein: a fixed sleeve connected to the shell is installed at the bottom, a control tube is fixedly installed inside the fixed sleeve, a distance measuring sensor is fixedly installed at the bottom of the inner wall of the control tube, a piston is movably connected inside the control tube, a piston rod is fixedly connected to the top of the piston, the piston rod passes through the top of the control tube and is fixedly connected to an adjusting head, an adjusting seat is sleeved on the surface of the adjusting head, the adjusting seat is fixedly connected to the top of the inner wall of the shell, a flow meter is connected to the top of the surface of the fixed sleeve, a nitrogen adding pipe is connected to the liquid outlet of the flow meter, the nitrogen adding pipe is connected to the bent pipe, the top and bottom of the control tube surface are connected to air pipes, one end of the air pipe passes through the outside of the fixed sleeve and is connected to a five-way solenoid valve, and the air inlet end of the five-way solenoid valve is connected to an air pump.

[0019] Preferably, the surface of the adjusting head is provided with a plurality of annular adjusting rings, the diameters of the plurality of annular adjusting rings increase sequentially from top to bottom, and the adjusting seat is provided with a plurality of annular adjusting grooves for use with the annular adjusting rings.

[0020] Preferably, wherein: an exhaust pipe is fixedly connected to the top of the recovery tank, an exhaust end of the exhaust pipe is connected to a fan, a nitrogen circulation tank is fixedly connected to the inner cavity of the recovery tank, the nitrogen circulation tank is respectively connected to the exhaust pipe and the recovery pipe, a water inlet pipe and a water outlet pipe are respectively connected to the surface of the recovery tank, a spiral cooling fin is fixedly connected to the surface of the nitrogen circulation tank, a plurality of evenly distributed buffer buckets are fixedly installed inside the nitrogen circulation tank, an air inlet hole is provided at the bottom of the buffer bucket, a plurality of nitrogen extraction holes are provided at the top of the hollow annular sleeve, a connecting ring is provided on the top of the nitrogen circulation tank, and the connecting ring is fixedly connected to the inner wall of the recovery tank.

[0021] Preferably, the top of the fixing frame is fixedly connected with a mounting frame, the bottom of the mounting frame is fixedly installed with an infrared thermometer for detecting the temperature of the mold body, the right end of the fixing frame is fixedly installed with a controller, and the front side of the fixing frame is fixedly installed with a nitrogen concentration detector.

[0022] A method for passing nitrogen through a nitrogen-permeable mold having multiple holes, comprising the following steps:

[0023] S1. Manually open the manual valve, and the liquid nitrogen pump starts working to extract liquid nitrogen from the liquid nitrogen tank;

[0024] S2. Liquid nitrogen is decompressed through the pressure reducing valve in the decompression reflux component to ensure that the liquid nitrogen enters the flow regulating component at an appropriate pressure;

[0025] S3. When it is necessary to stop the introduction of liquid nitrogen, the adjusting seat can be closed by the adjusting head. At the same time, the hydraulic cylinder operates the plugging head through the lifting plate to achieve temporary storage and reflux of liquid nitrogen to maintain system circulation and pressure balance;

[0026] S4, the controller adjusts the working state of the five-way solenoid valve and the air pump according to the mold body temperature detected by the infrared thermometer and the preset target value;

[0027] S5. The piston moves up and down through air pressure, driving the adjusting head to move to different positions inside the adjusting seat, changing the coordination between the annular adjusting ring and the adjusting groove, thereby finely adjusting the inflow flow of liquid nitrogen;

[0028] S6, flow meter and distance sensor provide continuous feedback to ensure the accuracy of regulation and timely response;

[0029] S7. The fan generates negative pressure inside the nitrogen circulation tank through the exhaust pipe to promote the extraction and circulation of nitrogen;

[0030] S8. The recovered nitrogen and the external circulating cooling water are heat exchanged in the nitrogen circulation tank through the spiral cooling fins. The cooling water absorbs the coldness of the nitrogen and flows out through the outlet pipe to be used for the cooling cycle of the aluminum extruder;

[0031] S9, buffer bucket helps to evenly distribute nitrogen flow during this process, reduce turbulence, and improve cooling efficiency and nitrogen recovery efficiency;

[0032] S10, nitrogen concentration detector monitors the nitrogen concentration in the working area. Once it exceeds the preset threshold, the controller will send out an alarm signal to ensure operation safety;

[0033] S11. During the whole process, the detection mechanism includes infrared thermometers and nitrogen concentration detectors and other equipment, which continuously monitor and feedback data to ensure the efficient and stable operation of the entire system.

[0034] Beneficial effects of the present invention:

[0035] 1. The present invention can facilitate the extrusion molding of aluminum profiles by opening a molding cavity inside the mold body. During the extrusion process, the liquid nitrogen inside the nitrogen passing mechanism enters the connecting channel through the bent pipe, and then enters the annular groove through the connecting channel. The liquid nitrogen flows around the molding cavity inside the annular groove and is injected into the molding cavity at multiple points through the nitrogen injection groove, so as to efficiently cool the aluminum profile.

[0036] 2. The present invention can facilitate pumping of the liquid pump by arranging a liquid nitrogen component. The manual valve is manually opened so that the liquid nitrogen pump can extract the liquid nitrogen inside the liquid nitrogen tank. The extracted liquid nitrogen enters the reflux pipe through the decompression reflux component and enters the flow regulating component through the decompression of the decompression valve. When the liquid nitrogen does not need to be introduced, the regulating head seals the regulating seat, and the hydraulic cylinder drives the sealing head to move downward through the lifting plate, and the sealing head seals the top of the separation tube, so that the liquid nitrogen is stored in the inner cavity of the shell. At this time, the pressure in the inner cavity of the reflux pipe increases, and the liquid nitrogen drives the moving head to slide inside the sliding seat, and the moving head drives the rod body to slide inside the limiter and squeeze the spring, so that the moving head is separated from the inner cavity of the sliding seat, and the liquid nitrogen flows back to the manual valve and the liquid nitrogen tank through the reflux groove on the sliding seat and the limiter, so that the liquid nitrogen keeps circulating, so that the liquid nitrogen can quickly enter the aluminum extrusion die through the nitrogen recovery component when the liquid nitrogen is cooled next time, thereby improving the efficiency of liquid nitrogen cooling.

[0037] 3. The present invention can precisely adjust the flow rate of liquid nitrogen cooling by setting a flow regulating component, avoid excessive cooling temperature amplitude and uneven cooling, and improve the quality of aluminum profile forming. Liquid nitrogen enters the inner cavity of the shell through the liquid inlet pipe, and the liquid nitrogen rotates around the spiral diverter blade. With the action of centrifugal force, the liquid nitrogen finally enters the adjustment seat. The nitrogen and bubbles in the liquid nitrogen enter the top of the inclined plate through the separation tube, and finally enter the joint through the outlet pipe. By separating the gas in the liquid nitrogen, it is avoided that the gas enters the aluminum extrusion die and causes the cooling efficiency to be reduced. The flow rate of liquid nitrogen is adjusted by controlling the position of the regulating head inside the regulating seat. The infrared thermometer detects the temperature of the mold body, and the detection data is transmitted to the controller Inside, the controller controls the position of the regulating head according to the detected temperature and the preset value. When the gas extracted by the air pump enters the control tube through the five-way solenoid valve and the air pipe at the bottom, it drives the piston to rise. The piston drives the regulating head to rise through the piston rod, so that the larger annular regulating ring on the surface of the regulating head is located in the smaller annular regulating groove, reducing the flow rate of liquid nitrogen. Conversely, the gas enters the control tube through the top air pipe, causing the regulating head to move downward, increasing the flow rate of liquid nitrogen. The distance sensor detects the height of the piston, and the flow meter detects the flow rate discharged by the fixed sleeve. The detected data is transmitted to the controller, so that the controller can control the operation of the air pump and the five-way solenoid valve more accurately, so that multiple annular regulating rings are located in different annular regulating grooves.

[0038] 4. The present invention can collect the gasified nitrogen by arranging a nitrogen recovery component. The liquid nitrogen absorbs heat and is converted into nitrogen after cooling. The nitrogen floats on the top of the mold body. The fan extracts the air inside the nitrogen circulation tank through the exhaust pipe to generate negative pressure inside the nitrogen circulation tank. The nitrogen circulation tank extracts the nitrogen through the recovery pipe, the hollow annular sleeve and the nitrogen extraction hole. At the same time, the nitrogen liquid separated inside the shell enters the recovery pipe through the joint. After the nitrogen enters the nitrogen circulation tank, the external cooling water circulates inside the recovery tank through the water inlet pipe and the water outlet pipe. The circulation process contacts the surface of the spiral cooling plate. The spiral cooling plate absorbs the cold energy of the nitrogen inside the nitrogen circulation tank and conducts it into the cooling water to cool the cooling water. The cooled cooling water is refluxed to the aluminum profile extruder for use, thereby realizing the recovery of cold energy, reducing the concentration of nitrogen in the air, and reducing the danger in the working process. The nitrogen concentration detector detects the concentration of nitrogen, and the detected signal is transmitted to the controller. When the nitrogen When the gas concentration is too high, an alarm signal is issued to remind the staff. When nitrogen circulates inside the nitrogen circulation tank, it passes through several buffer buckets. The air inlet holes opened at the bottom of several buffer buckets decrease from bottom to top. The setting of the buffer bucket helps to evenly distribute the nitrogen flow entering the nitrogen circulation tank, especially when the nitrogen flow is large or the flow rate is fast. Multiple buffer buckets can disperse the airflow to avoid turbulence or eddy currents caused by excessive local airflow, so that the nitrogen is more evenly distributed in the nitrogen circulation tank, which is beneficial to improving the cooling efficiency and nitrogen recovery efficiency. The air inlet area of ​​each buffer bucket gradually decreases from bottom to top. This design can gradually slow down the incoming nitrogen flow, avoid high-speed airflow directly impacting the nitrogen circulation tank, reduce energy loss, and also help reduce noise. In the process of nitrogen flowing through the buffer bucket, due to the gradual decrease in speed, the contact time with the spiral cooling fin is increased, which is beneficial to improve the heat transfer efficiency. This means that the heat in the nitrogen can be more fully absorbed by the cooling water to enhance the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a top view of the present invention.

[0040] Figure 2 It is a top view of the aluminum extrusion die of the present invention.

[0041] Figure 3 It is a partial cross-sectional view of the aluminum extrusion die of the present invention from above.

[0042] Figure 4 It is a front axonometric view of the nitrogen passing mechanism of the present invention.

[0043] Figure 5 This is a front axonometric view of the liquid nitrogen assembly of the present invention.

[0044] Figure 6This is a front axonometric view of the decompression reflux assembly of the present invention.

[0045] Figure 7 It is a partial cross-sectional side view of the decompression reflux assembly of the present invention.

[0046] Figure 8 This is a front axonometric view of the flow regulating assembly of the present invention.

[0047] Fig. 9 This is a front and cross-sectional isometric view of the flow regulating assembly of the present invention.

[0048] Fig.10 For the present invention Fig. 9 A is an enlarged view of the middle image.

[0049] Fig.11 It is a partial cross-sectional view of the flow regulating assembly of the present invention when viewed from above.

[0050] Fig.12 It is a schematic structural diagram of the adjustment seat and the adjustment head of the present invention.

[0051] Fig.13 This is a front axonometric view of the nitrogen recovery mechanism of the present invention.

[0052] Fig.14 It is a partial cross-sectional view of the nitrogen recovery mechanism of the present invention from a front view.

[0053] Fig.15 This is a main axonometric view of the detection mechanism of the present invention.

[0054] In the figure: 100, aluminum extrusion die; 101, die body; 102, connecting channel; 103, elbow; 104, nitrogen injection groove; 105, annular groove; 106, molding cavity; 200, nitrogen supply mechanism; 201, liquid nitrogen assembly; 2011, liquid nitrogen tank; 2012, manual valve; 2013, liquid nitrogen pump; 2014, mounting seat; 202, pressure reduction reflux assembly; 2021, reflux pipe; 2022, connecting pipe; 2023, pressure reducing valve; 2024, sliding seat; 2025, moving head; 2026, spring; 2027, stopper; 2028, rod body; 2029, reflux groove; 203, flow regulating assembly; 2031, shell; 2032, air outlet pipe; 2033, hydraulic cylinder; 2034, lifting plate; 2035, liquid inlet pipe; 2036, fixed sleeve; 2037, flow meter; 2038, air pipe; 2039, five-way solenoid valve; 20310, air pump; 2 0311, nitrogen adding pipe; 20312, spiral splitter blade; 20313, plugging head; 20314, inclined plate; 20315, adjustment seat; 20316, adjustment head; 20317, piston rod; 20318, control pipe; 20319, piston; 20320, distance sensor; 20321, separation pipe; 20322, annular adjustment groove; 20323, annular adjustment ring; 300, nitrogen recovery assembly; 301, hollow annular sleeve; 302, nitrogen extraction hole; 303, recovery pipe; 304, recovery tank; 305, exhaust pipe; 306, fan; 307, joint; 308, water outlet pipe; 309, water inlet pipe; 310, connecting ring; 311, buffer bucket; 312, nitrogen circulation tank; 313, spiral cooling plate; 400, detection mechanism; 401, fixing bracket; 402, nitrogen concentration detector; 403, controller; 404, mounting bracket; 405, infrared thermometer. DETAILED DESCRIPTION

[0055] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0056] Embodiment 1, as Figure 1-15 As shown, the present embodiment provides a one-mold multi-hole nitrogen-passing die, including an aluminum extrusion die 100, the aluminum extrusion die 100 includes a die body 101, a molding cavity 106 is provided on the die body 101, a plurality of nitrogen injection grooves 104 connected to the molding cavity 106 are also provided on the die body 101, an annular groove 105 connected to the nitrogen injection groove 104 is provided on the die body 101, a connecting channel 102 connected to the annular groove 105 is provided on the die body 101, a bent pipe 103 is installed inside the die body 101, one end of the bent pipe 103 is connected to the connecting channel 102, and the other end of the bent pipe 103 passes through the outside of the die body 101.

[0057] By opening a molding cavity 106 inside the mold body 101, it is possible to facilitate extrusion molding of the aluminum profile. During the extrusion process, the liquid nitrogen inside the nitrogen passing mechanism 200 enters the connecting channel 102 through the elbow 103, and then enters the annular groove 105 through the connecting channel 102. The liquid nitrogen flows around the molding cavity 106 inside the annular groove 105, and is injected into the molding cavity 106 at multiple points through the nitrogen injection groove 104, so as to efficiently cool the aluminum profile.

[0058] Furthermore, it also includes a nitrogen supply mechanism 200, which includes a liquid nitrogen component 201, the liquid outlet of the liquid nitrogen component 201 is connected to a decompression reflux component 202, the liquid outlet of the decompression reflux component 202 is connected to a flow regulating component 203, and the flow regulating component 203 is connected to the elbow 103.

[0059] Furthermore, the liquid nitrogen assembly 201 includes a liquid nitrogen tank 2011 , the top of the liquid nitrogen tank 2011 is connected to a manual valve 2012 , the top of the manual valve 2012 is connected to a liquid nitrogen pump 2013 , and a mounting seat 2014 is fixedly provided at the bottom of the liquid nitrogen tank 2011 .

[0060] Furthermore, the reduced pressure reflux component 202 includes a reflux pipe 2021 connected to the liquid inlet end of the manual valve 2012, a connecting pipe 2022 connected to the top of the reflux pipe 2021, the connecting pipe 2022 is connected to the liquid outlet end of the liquid nitrogen pump 2013, and the liquid outlet end of the reflux pipe 2021 is connected to a reduced pressure valve 2023.

[0061] Furthermore, the flow regulating component 203 includes a shell 2031 , and the surface of the shell 2031 is respectively connected with an air outlet pipe 2032 and a liquid inlet pipe 2035 , the liquid inlet pipe 2035 is connected to the liquid outlet end of the pressure reducing valve 2023 , and the air outlet pipe 2032 is connected to the joint 307 .

[0062] Furthermore, a sliding seat 2024 is fixedly connected to the inner wall of the reflux pipe 2021, and a moving head 2025 is movably connected inside the sliding seat 2024. One end of the moving head 2025 is fixedly connected to a rod body 2028. A limit piece 2027 is movably sleeved on the surface of the rod body 2028. The limit piece 2027 is fixedly connected to the inner wall of the reflux pipe 2021, and a plurality of reflux grooves 2029 are arranged around the surface of the limit piece 2027. A spring 2026 is movably sleeved on the surface of the rod body 2028, and the spring 2026 is located on the side opposite to the sliding seat 2024 and the limit piece 2027.

[0063] Furthermore, an inclined plate 20314 is fixedly connected to the top of the inner wall of the shell 2031, the air outlet pipe 2032 is located at the top of the inclined plate 20314, the liquid inlet pipe 2035 is located at the bottom of the inclined plate 20314, a separation pipe 20321 is fixedly connected to the center of the inclined plate 20314, and a spiral diversion blade 20312 is fixedly connected to the surface of the separation pipe 20321.

[0064] Furthermore, hydraulic cylinders 2033 are fixedly connected to the four corners of the top of the shell 2031, a lifting plate 2034 is fixedly connected to the top of the hydraulic cylinder 2033, a plugging head 20313 is fixedly connected to the bottom center of the lifting plate 2034, and the bottom of the plugging head 20313 penetrates into the inner cavity of the shell 2031.

[0065] Furthermore, a fixed sleeve 2036 connected to the housing 2031 is installed at the bottom of the housing 2031, a control tube 20318 is fixedly installed inside the fixed sleeve 2036, a distance measuring sensor 20320 is fixedly installed at the bottom of the inner wall of the control tube 20318, a piston 20319 is movably connected inside the control tube 20318, a piston rod 20317 is fixedly connected to the top of the piston 20319, the piston rod 20317 penetrates to the top of the control tube 20318 and is fixedly connected to an adjusting head 20316, and an adjusting head 20316 is sleeved on the surface Seat 20315, the adjustment seat 20315 is fixedly connected to the top of the inner wall of the shell 2031, the top of the surface of the fixed sleeve 2036 is connected to the flow meter 2037, the liquid outlet end of the flow meter 2037 is connected to the nitrogen adding pipe 20311, the nitrogen adding pipe 20311 is connected to the bent pipe 103, the top and bottom of the surface of the control pipe 20318 are connected to the air pipe 2038, one end of the air pipe 2038 passes through the outside of the fixed sleeve 2036 and is connected to the five-way solenoid valve 2039, and the air inlet end of the five-way solenoid valve 2039 is connected to the air pump 20310.

[0066] Furthermore, a plurality of annular adjustment rings 20323 are provided on the surface of the adjustment head 20316 , and the diameters of the plurality of annular adjustment rings 20323 increase from top to bottom. A plurality of annular adjustment grooves 20322 for use with the annular adjustment rings 20323 are provided inside the adjustment seat 20315 .

[0067] By setting the liquid nitrogen component 201, it is convenient to pump the liquid pump, and the manual valve 2012 is manually opened so that the liquid nitrogen pump 2013 can extract the liquid nitrogen in the liquid nitrogen tank 2011. The extracted liquid nitrogen enters the reflux pipe 2021 through the decompression reflux component 202, and enters the flow regulating component 203 through the decompression of the decompression valve 2023. When the liquid nitrogen does not need to be introduced, the regulating head 20316 closes the regulating seat 20315, and the hydraulic cylinder 2033 drives the plugging head 20313 to move downward through the lifting plate 2034, and the plugging head 20313 closes the top of the separation tube 20321, so that the liquid nitrogen is stored in the shell 20 31, at this time, the pressure in the inner cavity of the reflux pipe 2021 increases, the liquid nitrogen drives the moving head 2025 to slide inside the sliding seat 2024, and the moving head 2025 drives the rod body 2028 to slide inside the limiter 2027 and squeeze the spring 2026, so that the moving head 2025 is separated from the inner cavity of the sliding seat 2024, and the liquid nitrogen flows back to the manual valve 2012 and the liquid nitrogen tank 2011 through the reflux groove 2029 on the sliding seat 2024 and the limiter 2027, so that the liquid nitrogen keeps circulating, so that when the liquid nitrogen is cooled next time, the liquid nitrogen can quickly enter the aluminum extrusion die 100 through the nitrogen recovery component 300, thereby improving the efficiency of liquid nitrogen cooling.

[0068] By setting the flow regulating component 203, it is convenient to accurately adjust the flow of liquid nitrogen cooling, avoid excessive cooling temperature amplitude and uneven cooling, and improve the quality of aluminum profile forming. Liquid nitrogen enters the inner cavity of the shell 2031 through the liquid inlet pipe 2035, and the liquid nitrogen rotates around the spiral diverter blade 20312. With the action of centrifugal force, the liquid nitrogen finally enters the adjustment seat 20315. The nitrogen and bubbles in the liquid nitrogen enter the top of the inclined plate 20314 through the separation tube 20321, and finally enter the joint 307 through the outlet pipe 2032. By separating the gas in the liquid nitrogen, it is avoided that the gas enters the aluminum extrusion die 100, which causes the cooling efficiency to decrease. The flow of liquid nitrogen is adjusted by controlling the position of the regulating head 20316 inside the regulating seat 20315. The infrared thermometer 405 detects the temperature of the mold body 101, and the detection data is transmitted to the controller 403. The controller 403 controls the regulating head 20316 according to the detected temperature and the preset value. When the gas extracted by the air pump 20310 enters the control tube 20318 through the five-way solenoid valve 2039 and the air pipe 2038 at the bottom, the piston 20319 is driven to rise. The piston 20319 drives the regulating head 20316 to rise through the piston rod 20317, so that the larger annular regulating ring 20323 on the surface of the regulating head 20316 is located in the smaller annular regulating groove 20322, reducing the flow rate of liquid nitrogen. On the contrary, the gas enters the control tube 20318 through the air pipe 2038 at the top. The tube 20318 causes the regulating head 20316 to move downward, increasing the flow rate of liquid nitrogen. The distance sensor 20320 detects the height of the piston 20319. The flow meter 2037 detects the flow rate discharged by the fixed sleeve 2036. The detected data is transmitted to the controller 403, so that the controller 403 can more accurately control the operation of the air pump 20310 and the five-way solenoid valve 2039, so that the multiple annular regulating rings 20323 are located in different annular regulating grooves 20322.

[0069] When controlling the liquid nitrogen flow rate,

[0070] The infrared thermometer 405 and the flow meter 2037 are used as feedback elements to monitor the temperature of the mold body 101 and the liquid nitrogen flow in real time. These data are sent to the controller 403, which calculates the deviation from the current target state based on the preset target temperature and flow value, and adjusts the control strategy accordingly.

[0071] When it is detected that the temperature of the mold body 101 is too high or the cooling efficiency needs to be increased, the controller 403 will drive the air pump 20310 and the five-way solenoid valve 2039 to control the direction of gas flow and thereby adjust the position of the piston 20319 and the adjusting head 20316. The annular adjustment ring 20323 on the adjusting head 20316 moves in the annular adjustment groove 20322 at different positions, thereby changing the size of the channel through which the liquid nitrogen flows, thereby achieving fine-tuning of the liquid nitrogen flow rate.

[0072] The detection of the height of the piston 20319 by the distance sensor 20320 provides feedback on the precise position of the adjustment head 20316, ensuring the accuracy of the adjustment action. At the same time, the flow data monitored by the flow meter 2037 directly reflects the adjustment effect, so that the controller 403 can immediately understand whether the adjustment meets the expectations. If not, further adjustments are made, forming a continuous correction process until the set optimal flow is reached.

[0073] This adjustment mechanism based on real-time data feedback can cope with fluctuations in parameters such as temperature and pressure during the production process, realize dynamic and precise adjustment of the liquid nitrogen flow rate, and ensure stable and efficient cooling effect. Even if external conditions or demands change, the system can respond quickly and automatically adjust to the most appropriate cooling state, thereby improving the quality and production efficiency of aluminum profile forming.

[0074] Furthermore, it also includes a nitrogen recovery component 300, which includes a hollow annular sleeve 301 sleeved on the surface of the mold body 101, the surface of the hollow annular sleeve 301 is connected to a recovery pipe 303, the surface of the recovery pipe 303 is connected to a joint 307, and the top of the recovery pipe 303 is fixedly connected to a recovery tank 304.

[0075] Furthermore, an exhaust pipe 305 is fixedly connected to the top of the recovery tank 304, and a fan 306 is connected to the air outlet end of the exhaust pipe 305. A nitrogen circulation tank 312 is fixedly connected to the inner cavity of the recovery tank 304. The nitrogen circulation tank 312 is respectively connected to the exhaust pipe 305 and the recovery pipe 303. The surface of the recovery tank 304 is respectively connected to a water inlet pipe 309 and a water outlet pipe 308. A spiral cooling fin 313 is fixedly connected to the surface of the nitrogen circulation tank 312. A plurality of evenly distributed buffer buckets 311 are fixedly installed inside the nitrogen circulation tank 312. An air inlet hole is opened at the bottom of the buffer bucket 311, and a plurality of nitrogen extraction holes 302 are opened at the top of the hollow annular sleeve 301.

[0076] Furthermore, a connecting ring 310 is sleeved on the top of the nitrogen circulation tank 312 , and the connecting ring 310 is fixedly connected to the inner wall of the recovery tank 304 , and the connecting ring 310 provides a stable support for the nitrogen circulation tank 312 .

[0077] By setting up the nitrogen recovery component 300, it is convenient to collect the gasified nitrogen. After the liquid nitrogen is cooled, it absorbs heat and is converted into nitrogen. The nitrogen floats on the top of the mold body 101. The fan 306 extracts the air inside the nitrogen circulation tank 312 through the exhaust pipe 305 to generate negative pressure inside. The nitrogen circulation tank 312 extracts nitrogen through the recovery pipe 303, the hollow annular sleeve 301 and the nitrogen extraction hole 302. At the same time, the nitrogen liquid separated from the shell 2031 enters the recovery pipe 303 through the joint 307, and the nitrogen enters the nitrogen circulation tank 312. After that, the external cooling water circulates inside the recovery tank 304 through the water inlet pipe 309 and the water outlet pipe 308. During the circulation process, it contacts the surface of the spiral cooling plate 313. The spiral cooling plate 313 absorbs the cold energy of the nitrogen inside the nitrogen circulation tank 312 and conducts it to the cooling water to cool the cooling water. The cooled cooling water flows back to the aluminum profile extruder for use, thereby realizing the recovery of cold energy and reducing the concentration of nitrogen in the air, thereby reducing the danger in the working process. The nitrogen concentration detector 402 detects the concentration of nitrogen, and the detection signal The nitrogen gas is transmitted to the controller 403. When the nitrogen concentration is too high, an alarm signal is issued to remind the staff. When the nitrogen gas circulates inside the nitrogen circulation tank 312, it passes through a plurality of buffer buckets 311. The air inlet holes at the bottom of the plurality of buffer buckets 311 decrease from bottom to top. The setting of the buffer buckets 311 helps to evenly distribute the nitrogen gas flow entering the nitrogen circulation tank 312. Especially when the nitrogen flow rate is large or the flow rate is fast, the plurality of buffer buckets 311 can disperse the air flow to avoid turbulence or eddy current caused by excessive local air flow, so that the nitrogen gas in the nitrogen circulation tank 312 The distribution is more uniform, which is beneficial to improving the cooling efficiency and nitrogen recovery efficiency. The air inlet area of ​​each buffer bucket 311 gradually decreases from bottom to top. This design can gradually slow down the incoming nitrogen flow, avoid high-speed airflow directly impacting the nitrogen circulation tank 312, reduce energy loss, and also help reduce noise. In the process of nitrogen flowing through the buffer bucket 311, due to the gradual decrease in speed, the contact time with the spiral cooling fin 313 is increased, which is beneficial to improving the heat transfer efficiency. This means that the heat in the nitrogen can be more fully absorbed by the cooling water, thereby enhancing the cooling effect.

[0078] Furthermore, a detection mechanism 400 is included, and the detection mechanism 400 includes a fixing frame 401 installed on the surface of the mold body 101.

[0079] Furthermore, a mounting frame 404 is fixedly connected to the top of the fixing frame 401, an infrared thermometer 405 for detecting the temperature of the mold body 101 is fixedly installed at the bottom of the mounting frame 404, a controller 403 is fixedly installed at the right end of the fixing frame 401, and a nitrogen concentration detector 402 is fixedly installed on the front side of the fixing frame 401.

[0080] Embodiment 2, as Figure 1-15As shown, as the second embodiment of the present invention, this embodiment is based on the previous embodiment, and this embodiment provides a nitrogen passing method for a nitrogen passing mold with multiple holes, comprising the following steps:

[0081] S1. Manually open the manual valve 2012, and the liquid nitrogen pump 2013 starts to work to extract liquid nitrogen from the liquid nitrogen tank 2011;

[0082] S2, the liquid nitrogen is decompressed through the pressure reducing valve 2023 in the decompression reflux component 202 to ensure that the liquid nitrogen enters the flow regulating component 203 at a suitable pressure;

[0083] S3. When it is necessary to stop introducing liquid nitrogen, the adjusting seat 20315 can be closed by the adjusting head 20316, and at the same time, the hydraulic cylinder 2033 operates the plugging head 20313 through the lifting plate 2034 to achieve temporary storage and reflux of liquid nitrogen, so as to maintain system circulation and pressure balance;

[0084] S4, the controller 403 adjusts the working state of the five-way solenoid valve 2039 and the air pump 20310 according to the temperature of the mold body 101 detected by the infrared thermometer 405 and the preset target value;

[0085] S5. The piston 20319 is driven up and down by air pressure, driving the adjustment head 20316 to move to different positions inside the adjustment seat 20315, changing the cooperation between the annular adjustment ring 20323 and the annular adjustment groove 20322, thereby finely adjusting the inflow flow of liquid nitrogen;

[0086] S6, flow meter 2037 and distance sensor 20320 continuously provide feedback to ensure the accuracy of regulation and the timeliness of response;

[0087] S7, the fan 306 generates negative pressure inside the nitrogen circulation tank 312 through the exhaust pipe 305 to promote the extraction and circulation of nitrogen;

[0088] S8, the recovered nitrogen and the external circulating cooling water are heat exchanged in the nitrogen circulation tank 312 through the spiral cooling fins 313, and the cooling water absorbs the cold energy of the nitrogen and flows out through the outlet pipe 308, and is used for the cooling cycle of the aluminum profile extruder;

[0089] S9, the buffer hopper 311 helps to evenly distribute the nitrogen flow during this process, reduce turbulence, and improve cooling efficiency and nitrogen recovery efficiency;

[0090] S10, the nitrogen concentration detector 402 monitors the nitrogen concentration in the working area. Once it exceeds the preset threshold, the controller 403 will send an alarm signal to ensure operation safety;

[0091] S11. During the whole process, the detection mechanism 400 includes equipment such as an infrared thermometer 405 and a nitrogen concentration detector 402, which continuously monitor and feedback data to ensure efficient and stable operation of the entire system.

Claims

1. A nitrogen-permeable mold with multiple holes, characterized in that: include, An aluminum extrusion die (100), the aluminum extrusion die (100) comprising a die body (101), the die body (101) being provided with a molding cavity (106), the die body (101) being provided with a plurality of nitrogen injection grooves (104) connected to the molding cavity (106), the die body (101) being provided with an annular groove (105) connected to the nitrogen injection groove (104), the die body (101) being provided with a connecting channel (102) connected to the annular groove (105), a curved pipe (103) being installed inside the die body (101), one end of the curved pipe (103) being connected to the connecting channel (102), and the other end of the curved pipe (103) being passed through to the outside of the die body (101); A nitrogen supply mechanism (200), the nitrogen supply mechanism (200) comprising a liquid nitrogen component (201), the liquid outlet end of the liquid nitrogen component (201) being connected to a decompression reflux component (202), the liquid outlet end of the decompression reflux component (202) being connected to a flow regulating component (203), and the flow regulating component (203) being connected to a bent pipe (103); A nitrogen recovery component (300), the nitrogen recovery component (300) comprising a hollow annular sleeve (301) sleeved on the surface of the mold body (101), the surface of the hollow annular sleeve (301) being connected to a recovery pipe (303), the surface of the recovery pipe (303) being connected to a joint (307), and the top of the recovery pipe (303) being fixedly connected to a recovery tank (304); A detection mechanism (400), the detection mechanism (400) comprising a fixing frame (401) mounted on the surface of the mold body (101); The top of the recovery tank (304) is fixedly connected to an exhaust pipe (305), the exhaust end of the exhaust pipe (305) is connected to a fan (306), the inner cavity of the recovery tank (304) is fixedly connected to a nitrogen circulation tank (312), the nitrogen circulation tank (312) is respectively connected to the exhaust pipe (305) and the recovery pipe (303), the surface of the recovery tank (304) is respectively connected to a water inlet pipe (309) and a water outlet pipe (308), the nitrogen circulation tank (3 12) a spiral cooling fin (313) is fixedly connected to the surface, a plurality of evenly distributed buffer buckets (311) are fixedly installed inside the nitrogen circulation tank (312), an air inlet hole is opened at the bottom of the buffer bucket (311), a plurality of nitrogen extraction holes (302) are opened at the top of the hollow annular sleeve (301), a connecting ring (310) is sleeved on the top of the nitrogen circulation tank (312), and the connecting ring (310) is fixedly connected to the inner wall of the recovery tank (304); The flow regulating component (203) comprises a shell (2031), and the surface of the shell (2031) is respectively connected to an air outlet pipe (2032) and a liquid inlet pipe (2035); The top of the inner wall of the shell (2031) is fixedly connected to an inclined plate (20314); the air outlet pipe (2032) is located at the top of the inclined plate (20314); the liquid inlet pipe (2035) is located at the bottom of the inclined plate (20314); a separation pipe (20321) is fixedly connected to the center of the inclined plate (20314); and a spiral flow splitter blade (20312) is fixedly connected to the surface of the separation pipe (20321); The four corners of the top of the shell (2031) are all fixedly connected to a hydraulic cylinder (2033), the top of the hydraulic cylinder (2033) is fixedly connected to a lifting plate (2034), the bottom center of the lifting plate (2034) is fixedly connected to a plugging head (20313), and the bottom of the plugging head (20313) penetrates into the inner cavity of the shell (2031); The bottom of the housing (2031) is provided with a fixed sleeve (2036) in communication with the housing (2031), a control tube (20318) is fixedly installed inside the fixed sleeve (2036), a distance measuring sensor (20320) is fixedly installed at the bottom of the inner wall of the control tube (20318), a piston (20319) is movably connected inside the control tube (20318), a piston rod (20317) is fixedly connected to the top of the piston (20319), the piston rod (20317) passes through the top of the control tube (20318) and is fixedly connected to an adjusting head (20316), and an adjusting seat (20320) is sleeved on the surface of the adjusting head (20316). 315), the adjustment seat (20315) is fixedly connected to the top of the inner wall of the shell (2031), the top of the surface of the fixed sleeve (2036) is connected to a flow meter (2037), the liquid outlet of the flow meter (2037) is connected to a nitrogen addition pipe (20311), the nitrogen addition pipe (20311) is connected to the bent pipe (103), the top and bottom of the surface of the control pipe (20318) are both connected to an air pipe (2038), one end of the air pipe (2038) passes through the outside of the fixed sleeve (2036) and is connected to a five-way solenoid valve (2039), and the air inlet end of the five-way solenoid valve (2039) is connected to an air pump (20310); The surface of the adjustment head (20316) is provided with a plurality of annular adjustment rings (20323), the diameters of the plurality of annular adjustment rings (20323) increasing sequentially from top to bottom, and the adjustment seat (20315) is provided with a plurality of annular adjustment grooves (20322) for use in conjunction with the annular adjustment rings (20323).

2. The nitrogen-permeable mold with multiple holes as claimed in claim 1, characterized in that: The liquid nitrogen assembly (201) comprises a liquid nitrogen tank (2011), the top of the liquid nitrogen tank (2011) is connected to a manual valve (2012), the top of the manual valve (2012) is connected to a liquid nitrogen pump (2013), and a mounting seat (2014) is provided on a fixed sleeve at the bottom of the liquid nitrogen tank (2011); The decompression reflux component (202) comprises a reflux pipe (2021) connected to a liquid inlet end of a manual valve (212); the top of the reflux pipe (2021) is connected to a connecting pipe (2022); the connecting pipe (2022) is connected to a liquid outlet end of a liquid nitrogen pump (2013); the liquid outlet end of the reflux pipe (2021) is connected to a decompression valve (223); The liquid inlet pipe (2035) is in communication with the liquid outlet end of the pressure reducing valve (2023), and the air outlet pipe (2032) is in communication with the joint (307).

3. The nitrogen-permeable mold with multiple holes as claimed in claim 2, characterized in that: The inner wall of the reflux pipe (2021) is fixedly connected to a sliding seat (2024), the interior of the sliding seat (2024) is movably connected to a moving head (2025), one end of the moving head (2025) is fixedly connected to a rod body (2028), a limiter (2027) is movably sleeved on the surface of the rod body (2028), the limiter (2027) is fixedly connected to the inner wall of the reflux pipe (2021), a plurality of reflux grooves (2029) are formed around the surface of the limiter (2027), a spring (2026) is movably sleeved on the surface of the rod body (2028), and the spring (2026) is located on a side opposite to the sliding seat (2024) and the limiter (2027).

4. The nitrogen-permeable mold with multiple holes as claimed in claim 3, characterized in that: The top of the fixing frame (401) is fixedly connected to a mounting frame (404), the bottom of the mounting frame (404) is fixedly mounted with an infrared thermometer (405) for detecting the temperature of the mold body (101), the right end of the fixing frame (401) is fixedly mounted with a controller (403), and the front side of the fixing frame (401) is fixedly mounted with a nitrogen concentration detector (402).

5. A nitrogen-passing method for a nitrogen-passing mold with multiple holes in one mold, applicable to the nitrogen-passing mold with multiple holes in one mold as claimed in claim 4, characterized in that: The following steps are included: S1. Manually open the manual valve (2012), and the liquid nitrogen pump (2013) starts to work to extract liquid nitrogen from the liquid nitrogen tank (2011); S2, the liquid nitrogen is decompressed by the pressure reducing valve (223) in the decompression reflux component (202), so as to ensure that the liquid nitrogen enters the flow regulating component (203) at a suitable pressure; S3. When it is necessary to stop introducing liquid nitrogen, the adjusting seat (20315) can be closed by the adjusting head (20316), and at the same time, the hydraulic cylinder (2033) operates the plugging head (20313) through the lifting plate (2034) to achieve temporary storage and reflux of liquid nitrogen, so as to maintain system circulation and pressure balance; S4, the controller (403) adjusts the working states of the five-way solenoid valve (2039) and the air pump (20310) according to the temperature of the mold body (101) detected by the infrared thermometer (405) and the preset target value; S5, the piston (20319) is driven up and down by air pressure, driving the adjustment head (20316) to move to different positions inside the adjustment seat (20315), changing the coordination between the annular adjustment ring (20323) and the adjustment groove (20322), thereby finely adjusting the inflow flow of liquid nitrogen; S6, flow meter (2037) and distance sensor (20320) continuously provide feedback to ensure the accuracy of regulation and the timeliness of response; S7, the fan (306) generates negative pressure inside the nitrogen circulation tank (312) through the exhaust pipe (305), thereby promoting the extraction and circulation of nitrogen; S8, the recovered nitrogen and the externally circulated cooling water are heat exchanged in the nitrogen circulation tank (312) through the spiral cooling fins (313), and the cooling water absorbs the cold energy of the nitrogen and flows out through the water outlet pipe (308) to be used for the cooling cycle of the aluminum profile extruder; S9, the buffer hopper (311) helps to evenly distribute the nitrogen flow, reduce turbulence, and improve cooling efficiency and nitrogen recovery efficiency during this process; S10, the nitrogen concentration detector (402) monitors the nitrogen concentration in the working area. Once the nitrogen concentration exceeds a preset threshold, the controller (403) will send out an alarm signal to ensure operation safety; S11. During the whole process, the detection mechanism (400) includes equipment such as an infrared thermometer (405) and a nitrogen concentration detector (402), which continuously monitors and feeds back data to ensure efficient and stable operation of the whole system.

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