Nitrogen-assisted aluminum profile extrusion device

Abstract

This invention provides a nitrogen-assisted aluminum profile extrusion device, including a base assembly, a mandrel extrusion assembly, an outer core assembly, a mold frame assembly, a center locking block assembly, a nitrogen-assisted assembly, and a self-starting limit switch. The outer core assembly and the mandrel extrusion assembly are connected to the upper end of the base assembly. The rotation of the lower lead screw can drive the mandrel sleeve to move laterally. Simultaneously, the lower lead screw can also drive the outer core and the component formed by the outer core through the transmission mechanism, so that the outer core and the component formed by the outer core can move towards the mandrel sleeve, thereby facilitating the contact work between the two ends of the mold sleeve. During the process of the mold sleeve moving into place, the center locking block can also be driven to slide into the center locking groove, so that the locking teeth release the locking gear from the locking state, which can play a certain role in preventing errors. The nitrogen-assisted assembly, which is activated at the same time, can realize nitrogen protection in two positions.

Description

Technical Field

[0001] This invention relates to the field of aluminum profile processing equipment, and in particular to an aluminum profile extrusion device based on nitrogen assistance. Background Technology

[0002] The vigorous development of high-performance lightweight metal materials processing and manufacturing plays a crucial supporting role in industries such as new energy vehicles, military, shipbuilding, and photovoltaics. Furthermore, the demand and requirements for high-performance lightweight metal materials within these industries are increasing year by year. High-performance lightweight aluminum profiles are mainly produced through extrusion. However, in the first thermoforming stage of extrusion, aluminum, with its relatively reactive chemical properties, easily undergoes an oxidation reaction with oxygen at high temperatures, producing alumina particles that adhere to the profile surface. Traditional extrusion dies cannot effectively prevent oxidation at the extrusion port, resulting in materials with numerous particles that fail to meet quality requirements.

[0003] Therefore, it is necessary to develop a nitrogen-assisted rapid extrusion process to improve the mechanical properties of precision aluminum alloy structural parts, which can effectively reduce the problem of alumina particle formation on aluminum profile products. Summary of the Invention

[0004] The purpose of this invention is to provide a nitrogen-assisted aluminum profile extrusion device. By connecting a nitrogen-assisted component together with the components consisting of an outer core and an outer moving core and the mold sleeve, and only when the mold frame assembly carrying the extrusion mold moves into place, the drive-connected mandrel extrusion component and the outer core component can jointly abut against both ends of the mold sleeve to perform aluminum rod extrusion. This achieves nitrogen protection for the extruded profile on the basis of safety and error prevention, so that the aluminum profile can be immediately isolated from oxygen after extrusion, avoiding the formation of aluminum oxide particles.

[0005] The objective of this invention is achieved through the following technical solution: a nitrogen-assisted aluminum profile extrusion device, comprising a base assembly, a mandrel extrusion assembly, an outer core assembly, a mold frame assembly, a center locking block assembly, and a nitrogen-assisted assembly. The base assembly includes an outer core cavity, the mandrel extrusion assembly includes a mandrel outer fixed sleeve, the outer core assembly includes an outer core body and an outer moving core body, the mold frame assembly includes a mold frame base plate, the center locking block assembly includes a center locking groove, a locking gear, and a locking tooth body, and the nitrogen-assisted assembly includes an outlet tee.

[0006] The outer core cavity is fixed to the upper front end of the base assembly. A lower lead screw is horizontally screwed onto the upper end of the base assembly. The outer sleeve of the mandrel is slidably connected to the base assembly and is driven by the lower lead screw. The component consisting of the outer core and the outer movable core is slidably inserted into the outer core cavity. Symmetrically screwed outer core lead screws are attached to the outer front side of the base assembly. The front end of the outer movable core is driven by the outer core lead screw. Side shafts are driven by both sides of the lower lead screw, and the side shafts on the same side are driven by the outer core lead screw. The outer sleeve of the mandrel and the outer core are always coaxial. A movable mold base plate is located at the front end of the base assembly. A mold sleeve is installed on the upper end of the mold base plate. A central locking block is vertically slid into the front end of the base assembly. The central locking groove is located on the bottom surface of the mold base plate. The locking gear is inserted into one of the side shafts. The locking teeth slide in the direction of the locking gear and are connected to the central locking block. After the central locking block slides into the central locking groove, the locking teeth completely disengage from the locking gear. Conversely, the locking teeth are locked to the locking gear. The air outlet tee is located on the front side of the base assembly. One outlet of the air outlet tee is connected to the bottom of the outer core cavity, and the other outlet is connected to the bottom of the central locking block. After the outer core sleeve, outer core, and mold base plate are all moved and assembled, nitrogen can enter the outer core and mold sleeve from the air outlet tee.

[0007] The process of using the technical solution of the present invention is as follows:

[0008] First, the aluminum core rod to be extruded is placed into the core rod outer sleeve, and the corresponding extrusion die is installed in the die sleeve;

[0009] Subsequently, the mold sleeve and extrusion mold are adjusted and moved to a position coaxially aligned with the outer fixed sleeve and outer core of the mandrel using the automatically movable mold base plate;

[0010] As the die base plate moves, the top of the central locking block can slide into the central locking groove. As the die base plate moves into position, the central locking block is pushed downward into position by the die base plate. As the central locking block moves downward into position, the locking teeth that are elastically engaged with the locking gear can be disengaged through the transmission mechanism. At this time, the side shaft can rotate. That is to say, if the extrusion die is not adjusted and moved to the position to be extruded, the side shaft cannot rotate freely, and the lower screw cannot drive the outer fixed sleeve of the mandrel to move laterally. Only after the extrusion die is adjusted into position can the outer fixed sleeve of the mandrel be moved.

[0011] Subsequently, the rotation of the lower screw can drive the outer sleeve of the mandrel to move toward the extrusion die until the front end of the outer sleeve of the mandrel is against the rear end of the extrusion die.

[0012] As the lower lead screw rotates, it can drive the side shaft to rotate through the transmission mechanism. The side shaft, through the transmission mechanism, drives the outer core lead screw to rotate. Through the cooperation and transmission formed by the outer core lead screw and the outer moving core, the component composed of the outer core lead screw and the outer moving core can be driven to move towards the mold sleeve. After the front end of the outer fixed sleeve of the core rod is attached to the rear end of the extrusion mold, the rear end of the outer core is just attached to the front end of the mold sleeve.

[0013] At this time, the external nitrogen supply system is connected to the inner cavity of the outer core and the inner cavity of the mold sleeve through the gas outlet tee, which can supply nitrogen to the inner front end of the mold sleeve and the outer core to isolate oxygen. The extrusion mechanism can extrude the aluminum core rod in the outer fixed sleeve towards the extrusion mold. At this time, the nitrogen supplied into the inner front end of the mold sleeve and the outer core can simultaneously contact the surface of the extruded aluminum profile to prevent the formation of an oxide layer on the surface of the aluminum profile.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The present invention has a core extrusion assembly and an outer core assembly connected by transmission at the upper end of the base assembly. By rotating the lower screw, the mechanism consisting of the core outer fixed sleeve, the outer core body and the outer moving core body can be driven to move towards each other. This makes it convenient to quickly place the front and rear ends of the mold sleeve against the outer core body and the core outer fixed sleeve after the extrusion mold is installed in the mold sleeve. It also makes it convenient to disassemble and replace the extrusion mold, thereby improving work efficiency.

[0016] (2) The present invention also has a central locking block vertically sliding at the front top of the base assembly. When the mold sleeve is in the position of extrusion mold replacement, under the action of the elastic mechanism connected to the locking tooth body, the locking tooth body is in the state of locking with the locking gear, and the central locking block is in the position of elastic upward. As the mold frame base plate drives the mold sleeve to be aligned, the central locking block can be elastically slid into the central locking groove and push the central locking block to move downward. As the central locking block slides into the central locking groove and is in place, the mold sleeve is just moved to the position of alignment. At this time, the locking tooth body just disengages from the locking with the locking gear. Through the transmission connection formed between the central locking block assembly and the side shaft and the mold frame base plate, it can play a role in preventing errors.

[0017] (3) In the non-extrusion state of the present invention, the vent tee is simultaneously connected to the inner cavity of the outer core cavity and the interior of the middle locking block. Only after the mold base plate is moved into place and the outer core and the outer moving core are adjusted into place can the vent tee be connected to the inner cavity of the outer core cavity and the inner cavity of the outer moving core through the middle locking block and the mold base plate. In other words, when the extrusion mold is disassembled and replaced, the air passage connected to the vent tee is in a mechanically closed state. Only when the aluminum core rod is extruded can the air passage connected to the vent tee be connected, which can minimize the daily waste of nitrogen. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0019] Figure 1 This is a schematic diagram of the overall structure of a nitrogen-assisted aluminum profile extrusion device in its first state according to the present invention.

[0020] Figure 2 This is a schematic diagram of the overall structure of the second state of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the base assembly of the present invention;

[0022] Figure 4 This is a first-view structural schematic diagram of the mandrel extrusion assembly of the present invention;

[0023] Figure 5 This is a schematic diagram of the mandrel extrusion assembly of the present invention from a second perspective.

[0024] Figure 6 This is a first-view structural schematic diagram of the outer core assembly of the present invention;

[0025] Figure 7 This is a schematic diagram of the outer core assembly of the present invention from a second perspective;

[0026] Figure 8 This is a schematic diagram of the structure of the externally moved core portion of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of the mold frame assembly of the present invention;

[0028] Figure 10 This is a schematic diagram of the mold sleeve portion of the present invention;

[0029] Figure 11 This is a first-view structural schematic diagram of the mid-position locking block assembly of the present invention;

[0030] Figure 12 This is a schematic diagram of the middle locking block assembly from a second perspective of the present invention;

[0031] Figure 13 This is a schematic cross-sectional view of the locking block and the central locking groove in this invention.

[0032] Figure 14 This is a schematic diagram of the structure of the nitrogen-assisted component of the present invention;

[0033] Figure 15 This is a schematic diagram of the connection structure of the outer core bottom hole portion of the present invention;

[0034] Figure 16This is a schematic diagram of the axial flow fan wheel part of the present invention;

[0035] Figure 17 This is a schematic diagram of the internal hole portion in this invention.

[0036] Reference numerals: 1. Base assembly; 2. Mandrel extrusion assembly; 3. Outer core assembly; 4. Mold frame assembly; 5. Center locking block assembly; 6. Nitrogen-assisted assembly; 7. Self-starting limit switch; 101. Rear stand; 102. Front stand; 103. Horizontal connecting plate; 104. Top plate; 105. Main controller switch; 106. Outer core cavity; 201. Hydraulic cylinder; 202. External connecting seat; 203. Bottom slide rail; 204. Bottom slider; 205. Mandrel outer sleeve; 206. External connecting frame; 207. Mandrel outer sleeve; 208. 209. Aluminum core rod; 210. Lower lead screw; 211. Lead screw rear seat; 212. Lead screw front motor; 213. Lead screw slider; 304. Outer guide hole; 305. Outer core; 306. Outer core guide post; 307. Outer core lead screw slider; 308. Inner lead screw seat; 309. Outer connecting plate; 310. Outer lead screw seat; 311. Middle gear; 312. Side gear; 313. Side shaft; 314. Side connecting belt gear; 315. Outer lead screw with gear; 316. 317. Connecting toothed belt; 401. Side shaft seat; 402. Mold changing guide rail; 403. Limiting plate; 404. Mold changing slider; 405. Mold frame base plate; 406. Mold sleeve; 407. Extrusion mold; 408. Side upright plate; 409. Mold changing hydraulic cylinder; 410. Side lug; 411. Side slot; 501. Central locking groove; 502. Central locking block; 503. Central locking slide groove; 504. Locking rack; 505. Locking gear; 506. Locking shaft seat; 507. Locking shaft; 508. Locking connecting gear; 509. Bottom slide; 510. Locking plate; 511. Locking pin plate; 512. Locking pin; 513. Top spring; 514. Connecting rack; 515. Locking gear; 516. Locking tooth body; 517. Locking limit seat; 601. Pressure stabilizing tank; 602. Air outlet tee; 603. Solenoid valve; 604. Top connecting pipe; 605. Connecting hose; 606. Bottom connecting pipe; 607. Outer core bottom hole; 608. Inner rotating seat; 609. Opposing inner rotating seat; 610. Axial flow fan wheel; 611. Middle inner hole; 612. Bottom through hole. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0038] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] like Figure 1-17 As shown, a nitrogen-assisted aluminum profile extrusion device has an outer core cavity 106 fixedly connected to the middle position of the upper front side of the base assembly 1. A lower lead screw 209 is also horizontally screwed onto the upper end of the base assembly 1. The mandrel outer sleeve 205 is slidably connected in the base assembly 1 and is drivenly connected to the lower lead screw 209. A component consisting of an outer core 303 and an outer moving core 304 is slidably inserted into the outer core cavity 106. An outer core lead screw 307 is symmetrically screwed onto the outer side of the front end of the base assembly 1 with the outer core cavity 106 as the center. The front end of the outer moving core 304... The lower screw 209 is connected to the outer core screw 307 via a transmission connection. Side shafts 313 are connected to both sides of the lower screw 209. The side shafts 313 on the same side are connected to the outer core screw 307 via a transmission connection. The rotation of the lower screw 209 drives the synchronous rotation of the outer core screw 307, causing the components consisting of the outer mandrel sleeve 205, the outer core body 303, and the outer moving core body 304 to move towards each other. The outer mandrel sleeve 205 and the outer core body 303 are always coaxial. A movable mold base plate 404 is located at the front end of the base assembly 1. A mold sleeve 4 is installed on the upper end of the mold base plate 404. 06, and the mold base plate 404 is located between the outer fixed sleeve 205 of the mandrel and the outer core 303. The front end of the base assembly 1 also has a vertically slidable central locking block 502. The central locking groove 503 is opened on the bottom surface of the mold base plate 404. The locking gear 515 is inserted into one of the side shafts 313. The locking tooth 516 slides and bounces towards the locking gear 515 under the mold base plate 404 and is connected to the central locking block 502. After the central locking block 502 slides into the central locking groove 503, the locking tooth 516 completely disengages from the central locking block 502. The locking gear 515 is locked, and conversely, the locking gear 516 is in the locked state with the locking gear 515. The air outlet tee 602 is located on the front side of the base assembly 1, and its inlet is connected to the external nitrogen pipeline. One outlet of the air outlet tee 602 is connected to the bottom of the outer core cavity 106, and the other outlet is connected to the bottom of the middle locking block 502. After the core rod outer fixed sleeve 205, outer core 303 and mold base plate 404 are all moved and assembled in place, nitrogen can enter the outer core 304 and mold sleeve 406 from the air outlet tee 602.

[0040] Before the extrusion process, the aluminum mandrel 208 to be extruded is placed into the mandrel outer sleeve 205, and the corresponding nitrided extrusion die 407 is installed in the die sleeve 406.

[0041] The reason for nitriding the extrusion die 407 is that during the rapid extrusion of aluminum alloy profiles, the temperature of the extrusion die 407 itself rises due to the extrusion pressure. Combined with the uneven wall thickness of the cavities in the extrusion die 407, this easily leads to deformation, reduced thermal stability, and decreased hardness and service life. Utilizing the inert nature of nitrogen, injecting nitrogen into the extrusion die 407 effectively reduces its temperature, thus preventing deformation and improving its performance, service life, and efficiency. This effectively prevents pinholes, inclusions, cracks, and porosity in the cooled aluminum alloy profiles and effectively improves the surface quality, tensile strength, yield strength, elongation, and other mechanical properties of the profiles.

[0042] Subsequently, the mold sleeve 406 and the extrusion mold 407 are adjusted and moved to a position coaxially aligned with the mandrel outer fixed sleeve 205 and the outer core 303 by the automatically movable mold base plate 404.

[0043] As the mold base plate 404 moves, the top of the central locking block 502 can slide into the central locking groove 503. As the mold base plate 404 moves into place, the central locking block 502 is pushed down into place by the mold base plate 404. As the central locking block 502 moves down into place, the locking tooth 516, which is elastically engaged with the locking gear 515, can be disengaged through the transmission mechanism. At this time, the side shaft 313 can rotate. That is to say, if the extrusion mold 407 is not adjusted and moved to the extrusion position, the side shaft 313 cannot rotate freely, and the lower screw 209 cannot drive the mandrel outer fixed sleeve 205 to move laterally. Only after the extrusion mold 407 is adjusted into place can the mandrel outer fixed sleeve 205 be moved.

[0044] Subsequently, the rotation of the lower screw 209 can drive the mandrel outer sleeve 205 to move toward the extrusion die 407 until the front end of the mandrel outer sleeve 205 is in contact with the rear end of the extrusion die 407.

[0045] As the lower lead screw 209 rotates, the side shaft 313 can be driven to rotate through the transmission mechanism. The side shaft 313 drives the outer core lead screw 307 to rotate through the transmission mechanism. Through the cooperation and transmission formed by the outer core lead screw 307 and the outer moving core 304, the component composed of the outer core lead screw 307 and the outer moving core 304 can be driven to move towards the mold sleeve 406. After the front end of the mandrel outer fixed sleeve 205 is attached to the rear end of the extrusion mold 407, the rear end of the outer core 303 is just attached to the front end of the mold sleeve 406.

[0046] At this time, the external nitrogen supply system is connected to the inner cavity of the outer core 304 and the inner cavity of the mold sleeve 406 through the vent tee 602. Nitrogen can be supplied to the inner front end of the mold sleeve 406 and the outer core 304 to isolate oxygen. The extrusion mechanism can extrude the aluminum core 208 in the outer sleeve 205 towards the extrusion mold 407. At this time, the nitrogen supplied into the inner front end of the mold sleeve 406 and the outer core 304 can simultaneously contact the surface of the extruded aluminum profile to prevent the formation of an oxide layer on the surface of the aluminum profile.

[0047] The specific structure of base component 1 is as follows: Figure 3 As shown, a horizontal connecting plate 103 is symmetrically fixed between the rear support 101 and the front support 102, and a top plate 104 is fixedly connected to the top of the two sets of horizontal connecting plates 103 and the front support 102.

[0048] A main controller switch 105 is fixedly installed on a set of horizontal connecting plates 103 on the outer side, near the rear stand 101.

[0049] The outer core cavity 106 is connected and fixed to the middle position of the top of the front stand 102. The middle position of the front end of the outer core cavity 106 is provided with a discharge port that communicates with the inner cavity of the outer core cavity 106. The present invention is fixedly installed in the operating position by the bottom ends of the rear stand 101 and the front stand 102.

[0050] The specific structure of mold frame assembly 4 is as follows: Figure 9 and Figure 10 As shown, the mold changing guide rails 401 are symmetrically fixedly connected to the top surface of the top plate 104. Each set of mold changing guide rails 401 is slidably connected to a mold changing slider 403, and both ends of the two sets of mold changing guide rails 401 are fixedly connected to a limiting plate 402 to prevent the mold changing slider 403 from moving beyond its travel. The mold frame base plate 404 is fixedly connected to the top of the mold changing slider 403.

[0051] The mold frame 405 is fixedly connected to the top of the mold frame base plate 404, and the mold sleeve 406 is positioned and installed in the mold frame 405. The extrusion mold 407 for different profiles can be inserted into the inner rear end of the mold sleeve 406.

[0052] A side plate 408 is fixedly connected to one side of the top of the top plate 104. A mold changing hydraulic cylinder 409 is installed and fixed on the inner side of the side plate 408. The push rod of the mold changing hydraulic cylinder 409 is fixedly connected to the side of the mold frame 405.

[0053] Furthermore, both the mold-changing hydraulic cylinder 409 and the hydraulic cylinder 201 are connected to the hydraulic system controlled by the main controller switch 105;

[0054] After the required mold is installed into the inner rear end of the mold sleeve 406, the mold changing hydraulic cylinder 409 can be started by the main controller switch 105. The push rod of the mold changing hydraulic cylinder 409 is retracted, which can drive the mold frame 405 and the mold sleeve 406 to move to the middle position of the base assembly 1 until the extrusion mold 407 in the mold sleeve 406 is moved to the position directly opposite the outer core 303, and the mold changing hydraulic cylinder 409 is stopped.

[0055] The specific structures of the mandrel extrusion assembly 2 and the outer core assembly 3 are as follows: Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the outer connecting seat 202 is fixedly connected to the top of the two sets of horizontal connecting plates 103. One end of the hydraulic cylinder 201 is fixedly connected to the inner side of the rear stand 101, and the other end is fixedly connected to the outer connecting seat 202.

[0056] The top of each set of horizontal connecting plates 103 is horizontally fixed with a bottom slide rail 203. The outer connecting frame 206 is symmetrically fixed on both sides of the outer sleeve 205 of the core rod. The bottom end of the outer connecting frame 206 is fixed with a bottom slider 204, which is slidably connected in the bottom slide rail 203.

[0057] The outer sleeve 205 of the mandrel is fixedly installed with the mandrel outer sleeve 207. When the push rod of the hydraulic cylinder 201 is retracted, the aluminum mandrel 208 to be extruded can be placed in the mandrel outer sleeve 207.

[0058] The bottom end of the outer connecting seat 202 is fixedly connected to the lead screw back seat 210. One end of the lower lead screw 209 is rotatably connected in the lead screw back seat 210. The bottom end of the top plate 104 is fixedly installed with the lead screw front motor 211. The other end of the lower lead screw 209 is fixedly connected to the rotating shaft of the lead screw front motor 211. The lead screw slider 212 is fixedly connected to the middle position of the outer bottom end of the mandrel outer fixed sleeve 205 and is connected in conjunction with the lower lead screw 209. The lead screw front motor 211 is electrically connected to the main controller switch 105.

[0059] The outer guide holes 301 are symmetrically opened at the front end of the outer core cavity 106. An outer guide seat 302 is inserted and fixed in each group of outer guide holes 301. An outer core guide post 305 is slidably inserted in each group of outer guide seats 302. The inner end of the outer core guide post 305 is fixedly connected to the front end of the outer core body 304.

[0060] Each set of outer core guide posts 305 has an outer core screw slider 306 fixedly connected to its outer end, and the outer core screw slider 306 is connected in the outer core screw 307. The front outer side of the front stand 102 is symmetrically fixed with a screw inner seat 308. The inner end of the outer core screw 307 is rotatably connected in the screw inner seat 308. The front outer side of the front stand 102 is also fixedly connected with an outer connecting plate 309 with a corner structure. The upper end of the outer connecting plate 309 is symmetrically fixed with a screw outer seat 310. The outer end of the outer core screw 307 is rotatably connected in the screw outer seat 310.

[0061] The middle gear 311 is inserted and fixed in the lower lead screw 209 near the front motor 211 of the lead screw. The bottom surface of the top plate 104 is symmetrically fixed with a side shaft seat 317. Two sets of side shafts 313 are rotatably connected in the side shaft seat 317. The rear end of each set of side shafts 313 is fixed with a side gear 312, and both sets of side gears 312 mesh with the middle gear 311. The side shaft 313 passes through the front end of the front stand 102 and is fixed with a side connecting belt gear 314. Each set of outer core lead screws 307 is inserted and fixed with an outer lead screw belt gear 315. A connecting belt 316 is sleeved between the side connecting belt gear 314 and the outer lead screw belt gear 315 on the same side.

[0062] Furthermore, the top of the external connecting plate 309 will not interfere with the discharge of the aluminum profile;

[0063] The specific structure of the middle locking block assembly 5 is as follows: Figure 11 , Figure 12 and Figure 13 As shown, the central locking groove 501 is vertically opened in the main body of the top plate 104, and the central locking block 502 is slidably inserted into the central locking groove 501.

[0064] A locking rack 504 is fixedly connected to the side of the top plate 104 below the central locking block 502. A locking gear 505 meshes with one side of the locking rack 504. A locking shaft seat 506 is fixedly connected to the bottom surface of the top plate 104. A locking shaft 507 is rotatably connected in the locking shaft seat 506. The locking gear 505 is inserted and fixed at one end of the locking shaft 507. A locking connecting gear 508 is inserted and fixed at the other end of the locking shaft 507.

[0065] The bottom surface of the top plate 104 is also fixedly connected to the bottom slide 509, and the top surface of the locking plate 510 is fixedly connected to the locking pin plate 511. The two sets of locking pin plates 511 are connected at a height by a locking pin 512. The locking pin 512 is slidably connected in the bottom slide 509. Each set of locking pins 512 is fitted with a top spring 513. One end of the top spring 513 is fixedly engaged in the bottom slide 509, and the other end is fixedly engaged in the set of locking pin plates 511 near the locking gear 515.

[0066] A connecting rack 514 is fixed to one end of the locking plate 510, and the connecting rack 514 meshes with the locking connecting gear 508. The locking tooth body 516 is fixedly connected to the other end of the locking plate 510.

[0067] The bottom surface of the mold base plate 404 is also fixedly connected to the locking seat 517. After the mold base plate 404 moves to the position where the mold sleeve 406, the mandrel outer sleeve 207, and the outer core 303 are all aligned, the middle locking block 502 slides into the middle locking groove 503 and forms abutment with the locking seat 517.

[0068] Furthermore, the top of the central locking block 502 is provided with an inclined surface that is at the same angle as the central locking groove 503. Through the sliding engagement formed by the inclined surface at the top of the central locking block 502 and the central locking groove 503, the central locking block 502 can be gradually pushed down during the process of the mold base plate 404 moving into place. After the mold base plate 404 is moved to the middle position and is directly opposite the core rod outer sleeve 207 and the outer core 303, the locking tooth 516 disengages from the locking gear 515 under the action of the downward movement of the central locking block 502. In addition, the inclined surface at the top of the central locking block 502 and the position directly opposite the entrance of the central locking groove 503 are provided with chamfers to facilitate the top of the central locking block 502 to slide into the central locking groove 503 without contacting it.

[0069] During the movement of the mold frame 405 and the mold frame base plate 404, the top of the central locking block 502 can gradually slide into the central locking groove 503. As the central locking block 502 moves downward, it can drive the locking rack 504 to move downward, so that the locking rack 504 and the locking gear 505 form a transmission. The locking gear 505 drives the rotation of the locking connecting gear 508 coaxially through the locking shaft 507. The locking connecting gear 508 and the connecting rack 514 form a transmission, which can drive the locking tooth 516, which locks the locking gear 515 under the elastic force of the top spring 513, to retract. Thus, after the central locking block 502 slides into and abuts against the locking limit seat 517, the locking tooth 516 completely disengages from the locking gear 515, and the locking gear 515 and the side shaft 313 can rotate freely.

[0070] Then, the main controller switch 105 starts the front motor 211 of the lead screw to drive the rotation of the lower lead screw 209, so that the lower lead screw 209 and the lead screw slider 212 form a transmission, which drives the outer connecting frame 206 and the mandrel sleeve 207 to move towards the mold sleeve 406 that has been moved into place, until the front end of the mandrel sleeve 207 is in contact with the rear end of the extrusion mold 407, and then the front motor 211 of the lead screw stops.

[0071] During the rotation of the lower lead screw 209, the middle gear 311 is also driven to rotate. The middle gear 311 synchronously engages with the side gears 312 on both sides, which can drive the rotation of the side shaft 313, thereby driving the rotation of the side connecting belt gear 314. The side connecting belt gear 314 drives the rotation of the outer lead screw belt gear 315 through the connecting toothed belt 316, which in turn drives the rotation of the outer core lead screw 307. Through the engagement and transmission formed by the outer core lead screw 307 and the outer core lead screw slider 306, the outer core lead screw slider 306 and the outer core 304 can be driven to move towards the mold sleeve 406. When the front end of the core sleeve 207 is in contact with the rear end of the extrusion mold 407, the rear end of the outer core 303 is in contact with the front end of the mold sleeve 406.

[0072] The specific structure of nitrogen-assisted component 6 is as follows: Figure 14 , Figure 15 , Figure 16 and Figure 17 As shown, the pressure stabilizing tank 601 is fixedly connected in the external connecting plate 309. The inlet of the gas outlet tee 602 is connected to the outlet of the pressure stabilizing tank 601. A solenoid valve 603 is installed on the pipeline connecting the inlet of the gas outlet tee 602 and the outlet of the pressure stabilizing tank 601. The solenoid valve 603 is electrically connected to the main controller switch 105. The inlet of the pressure stabilizing tank 601 is connected to the external nitrogen supply pipeline.

[0073] The lower end of the cavity wall of the outer core cavity 106 is connected to the top connecting pipe 604, the upper outlet of the air outlet tee 602 is connected to the top connecting pipe 604, the lower end of the middle locking block 502 is connected to the bottom connecting pipe 606, the lower outlet of the air outlet tee 602 is connected to the connecting hose 605, and the connecting hose 605 passes through the front stand 102 and is connected to the bottom connecting pipe 606.

[0074] The lower end of the cavity wall of the outer core 304 is provided with an outer core bottom hole 607, and after the outer core 304 and the outer core 303 move into place in the direction of the core rod outer sleeve 207, the outer core bottom hole 607 is exactly aligned with the top connecting tube 604.

[0075] An inner rotating seat 608 is fixed to the bottom surface of the inner cavity of the outer core 304, and an opposing inner rotating seat 609 is fixed to the bottom surface of the inner cavity of the outer core 303. One end of the axial flow fan wheel 610 is rotatably connected to the inner rotating seat 608, and the other end is rotatably connected to the opposing inner rotating seat 609.

[0076] The middle locking block 502 has a vertically formed inner hole 611 in the middle position. The bottom of the mold base plate 404, mold base 405, and mold sleeve 406 are all formed with a bottom through hole 612. After the middle locking block 502 moves to the position where the bottom of the mold base plate 404 is in contact with the locking seat 517, the inner hole 611 and the bottom through hole 612 are directly opposite each other.

[0077] A self-starting limit switch 7 is also installed and fixed on the side of the top plate 104. The self-starting limit switch 7 is electrically connected to the main controller switch 105. After the front end of the mandrel sleeve 207 moves to abut against the rear end of the mold sleeve 406, the front end of the outer connecting frame 206 just triggers the self-starting limit switch 7. At this time, the nitrogen supply system connected to the pressure tank 601 can be automatically started and the solenoid valve 603 can be opened.

[0078] Furthermore, after the mold base plate 404, the outer core 303, and the outer moving core 304 are all moved into place, the outer moving core bottom hole 607 at the bottom end of the cavity wall of the outer moving core 304 is moved to the position that is directly connected to the top connecting pipe 604, and the inner hole 611 in the middle locking block 502 is connected to the bottom through hole 612 that is jointly opened in the mold base plate 404, the mold base 405, and the mold sleeve 406;

[0079] While the front end of the mandrel jacket 207 is in contact with the rear end of the extrusion die 407, the front end of the outer connecting frame 206 just triggers the self-starting limit switch 7. The self-starting limit switch 7 sends a feedback signal to the main controller switch 105, which can automatically start the nitrogen supply system connected to the pressure tank 601 and open the solenoid valve 603.

[0080] Subsequently, the hydraulic cylinder 201 is activated by the main controller switch 105. The push rod of the hydraulic cylinder 201 extends into the interior of the mandrel sleeve 207 and extrudes the aluminum mandrel 208, so that the aluminum mandrel 208 is formed by the extrusion die 407 to form an aluminum profile. The formed aluminum profile enters the inner cavity of the outer core 303 and the outer moving core 304 from the front end of the die sleeve 406, and exits from the discharge port at the front end of the outer core cavity 106.

[0081] As nitrogen enters the inner cavity of the outer core 304, it can drive the rotation of the axial fan wheel 610, so that the nitrogen entering the inner cavity of the outer core 304 is evenly dispersed into the inner cavities of the outer core 303 and the outer core 304.

[0082] Nitrogen gas will simultaneously enter the mold sleeve 406, which can immediately provide nitrogen protection for the aluminum profile that has just been extruded from the extrusion mold 407.

[0083] The double nitrogen protection formed inside the mold sleeve 406 and the outer core 303 and the outer moving core 304 can effectively prevent oxidation from forming on the surface of the aluminum profile.

[0084] Preferably, the mold frame 405 has a U-shaped opening structure, and the upper inner end of the opening structure is symmetrically provided with side slots 411. The two ends of the mold sleeve 406 are symmetrically fixed with side ears 410. Through the cooperation formed by the side ears 410 and the side slots 411, the mold sleeve 406 will not easily rotate axially after being installed and fixed in the mold frame 405.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nitrogen-assisted aluminum profile extrusion device, comprising a base assembly (1), characterized in that: It also includes a mandrel extrusion assembly (2), an outer core assembly (3), a mold frame assembly (4), a center locking block assembly (5), and a nitrogen-assisted assembly (6); The base assembly (1) includes an outer core cavity (106), the mandrel extrusion assembly (2) includes a mandrel outer fixed sleeve (205), the outer core assembly (3) includes an outer core body (303) and an outer moving core body (304), the mold frame assembly (4) includes a mold frame base plate (404), the center locking block assembly (5) includes a center locking groove (503), a locking gear (515) and a locking tooth body (516), and the nitrogen auxiliary assembly (6) includes an exhaust tee (602); The outer core cavity (106) is fixed to the upper front end of the base assembly (1). A lower lead screw (209) is horizontally screwed onto the upper end of the base assembly (1). The outer core sleeve (205) is slidably connected in the base assembly (1) and is connected to the lower lead screw (209). The component consisting of the outer core body (303) and the outer moving core body (304) is slidably inserted into the outer core cavity (106). The outer core lead screw (307) is symmetrically screwed onto the outer side of the front end of the base assembly (1). The front end of the outer moving core body (304) is connected to the outer core. The lead screw (307) is connected to the transmission, and the two sides of the lower lead screw (209) are respectively connected to the transmission shafts (313). The side shafts (313) on the same side are connected to the outer core lead screw (307). The outer core sleeve (205) and the outer core (303) are always coaxial. The movable mold base plate (404) is located at the front end of the base assembly (1). The mold sleeve (406) is installed at the upper end of the mold base plate (404). The front end of the base assembly (1) is also vertically slidably fitted with a central locking block (502). A groove (503) is formed on the bottom surface of the mold base plate (404). A locking gear (515) is inserted into one of the side shafts (313). A locking tooth (516) slides in the direction of the locking gear (515) below the mold base plate (404) and is connected to the central locking block (502). After the central locking block (502) slides into the central locking groove (503), the locking tooth (516) completely disengages from the locking gear (515). Conversely, the locking tooth (516) moves out of the groove. The gas outlet tee (602) is located in the locked state with the locking gear (515). The gas outlet tee (602) is located on the front side of the base assembly (1). One outlet of the gas outlet tee (602) is connected to the bottom of the outer core cavity (106), and the other outlet is connected to the bottom of the middle locking block (502). After the outer fixed sleeve (205), outer core (303) and mold base plate (404) are all moved and assembled in place, nitrogen can enter the outer core (304) and mold sleeve (406) from the gas outlet tee (602).

2. The nitrogen-assisted aluminum profile extrusion device according to claim 1, characterized in that: The base assembly (1) also includes a rear stand (101) and a front stand (102). A horizontal connecting plate (103) is symmetrically connected and fixed between the rear stand (101) and the front stand (102). A top plate (104) is fixedly connected to the top of the two sets of horizontal connecting plates (103) and the front stand (102). A main controller switch (105) is fixedly installed in one set of horizontal connecting plates (103) on the outside. The outer core cavity (106) is connected and fixed to the top of the front stand (102).

3. The nitrogen-assisted aluminum profile extrusion device according to claim 2, characterized in that: The mandrel extrusion assembly (2) also includes a hydraulic cylinder (201), an outer connecting seat (202), and a lead screw slider (212). The outer connecting seat (202) is fixed to the top of two sets of horizontal connecting plates (103). One end of the hydraulic cylinder (201) is fixedly connected to the inside of the rear stand (101), and the other end is fixedly connected to the outer connecting seat (202). The top of each set of horizontal connecting plates (103) is horizontally fixed with a bottom slide rail (203). The outer sleeve (205) of the mandrel is symmetrically fixed with an outer connecting frame (206). The bottom end of the outer connecting frame (206) is fixed with a bottom slider (204), and the bottom slider (204) is slidably connected to the bottom slide rail (212). In 203), a mandrel outer sleeve (207) is fixedly installed inside the mandrel outer sleeve (205), a lead screw back seat (210) is fixedly connected to the bottom end of the outer connecting seat (202), one end of the lower lead screw (209) is rotatably connected to the lead screw back seat (210), a lead screw front motor (211) is fixedly installed at the bottom end of the top plate (104), the other end of the lower lead screw (209) is fixedly connected to the shaft of the lead screw front motor (211), the lead screw slider (212) is fixedly connected to the bottom end of the mandrel outer sleeve (205) and is connected to the lower lead screw (209), and the lead screw front motor (211) is electrically connected to the main controller switch (105).

4. A nitrogen-assisted aluminum profile extrusion apparatus according to claim 2 or 3, characterized in that: The outer core assembly (3) also includes an outer guide hole (301) and a central gear (311). The outer guide holes (301) are symmetrically opened at the front end of the outer core cavity (106). An outer guide seat (302) is inserted and fixed in each set of outer guide holes (301). An outer core guide post (305) is slidably inserted in each set of outer guide seats (302). The inner end of the outer core guide post (305) is fixedly connected to the front end of the outer core body (304). The outer ends of the core guide post (305) are all fixedly connected to the outer core screw slider (306), and the outer core screw slider (306) is connected in conjunction with the outer core screw (307). The front outer side of the front stand (102) is symmetrically fixed with the screw inner seat (308), and the inner end of the outer core screw (307) is rotatably connected in the screw inner seat (308). The front outer side of the front stand (102) is also fixedly connected with the outer connecting plate (309). The upper end of the outer connecting plate (309) is symmetrically fixed with a lead screw outer seat (310). The outer end of the outer core lead screw (307) is rotatably connected to the lead screw outer seat (310). The middle gear (311) is inserted and fixed in the lower lead screw (209). The bottom surface of the top plate (104) is symmetrically fixed with a side shaft seat (317). Two sets of side shafts (313) are rotatably connected to the side shaft seats (317). Each set of side shafts (313) has... The rear end is fixed with a side gear (312), and both sets of side gears (312) mesh with the middle gear (311). The side shaft (313) passes through the front end of the front stand (102) and is fixed with a side connecting belt gear (314). Each set of outer core screws (307) is inserted and fixed with an outer screw belt gear (315). A connecting toothed belt (316) is sleeved between the side connecting belt gear (314) and the outer screw belt gear (315).

5. A nitrogen-assisted aluminum profile extrusion apparatus according to claim 2 or 3, characterized in that: The mold frame assembly (4) also includes a mold changing guide rail (401), a mold frame (405), and an extrusion die (407). The mold changing guide rails (401) are symmetrically fixedly connected to the top surface of the top plate (104). Each set of mold changing guide rails (401) is slidably connected to a mold changing slider (403), and both ends of the two sets of mold changing guide rails (401) are fixedly connected to limit plates (402). The mold frame base plate (404) is fixedly connected to the top of the mold changing slider (403), and the mold frame (405) is fixedly connected to the top of the mold frame base plate (404). The mold sleeve (406) is positioned and installed in the mold frame (405). The extrusion mold (407) can be inserted into the inner rear end of the mold sleeve (406). A side plate (408) is fixedly connected to one side of the top of the top plate (104). A mold changing hydraulic cylinder (409) is installed and fixed on the inner side of the side plate (408). The push rod of the mold changing hydraulic cylinder (409) is fixedly connected to the side of the mold frame (405). Both the mold changing hydraulic cylinder (409) and the hydraulic cylinder (201) are connected to the hydraulic system controlled by the main controller switch (105).

6. The nitrogen-assisted aluminum profile extrusion apparatus according to claim 5, characterized in that: The mold frame (405) has a U-shaped opening structure, and the upper inner end of the opening structure is symmetrically provided with side slots (411). The mold sleeve (406) has side ears (410) symmetrically fixed at both ends.

7. The nitrogen-assisted aluminum profile extrusion apparatus according to claim 5, characterized in that: The center locking block assembly (5) also includes a center locking groove (501), a locking shaft (507), a bottom slide (509), and a locking plate (510). The center locking groove (501) is vertically opened in the main body of the top plate (104). The center locking block (502) is slidably inserted into the center locking groove (501). The center locking block (502) is inserted into the side of the top plate (104) below and fixedly connected to a locking rack (504). A locking gear (505) meshes with one side of the locking rack (504). A locking shaft seat (506) is fixedly connected to the bottom surface of the top plate (104). The locking shaft (507) is rotatably connected to the locking shaft seat (506). The locking gear (505) is inserted and fixedly fixed to one end of the locking shaft (507). A locking connecting gear (508) is inserted and fixedly fixed to the other end of the locking shaft (507). The top plate (104) The bottom surface is also fixedly connected to a bottom slide (509), the top surface of the locking plate (510) is fixedly connected to a locking pin plate (511), the two sets of locking pin plates (511) are connected at a height between them, the locking pin (512) is slidably connected in the bottom slide (509), each set of locking pins (512) is fitted with a top spring (513), one end of the top spring (513) is snapped and fixed in the bottom slide (509), the other end is snapped and fixed in a set of locking pin plates (511) near the locking gear (515), one end of the locking plate (510) is fixedly connected to a connecting rack (514), and the connecting rack (514) meshes with the locking connecting gear (508), the locking tooth body (516) is fixedly connected to the other end of the locking plate (510), and the bottom surface of the mold base plate (404) is also fixedly connected to a locking limit seat (517).

8. A nitrogen-assisted aluminum profile extrusion apparatus according to claim 1, 2, 3, 6 or 7, characterized in that: The top of the central locking block (502) has an inclined surface that is at the same angle as the central locking groove (503), and a sliding fit is formed between the inclined surface at the top of the central locking block (502) and the central locking groove (503).

9. The nitrogen-assisted aluminum profile extrusion apparatus according to claim 4, characterized in that: The nitrogen auxiliary component (6) also includes a pressure stabilizing tank (601), a connecting hose (605), and an axial flow fan wheel (610). The pressure stabilizing tank (601) is fixedly connected in the outer connecting plate (309). The inlet of the outlet tee (602) is connected to the outlet of the pressure stabilizing tank (601), and a solenoid valve (603) is installed on the pipeline connecting the inlet of the outlet tee (602) and the outlet of the pressure stabilizing tank (601). The solenoid valve (603) is electrically connected to the main controller switch (105). The outer core cavity (106) is connected to a top connecting pipe (604) at the lower end of its cavity wall. The upper outlet of the vent tee (602) is connected to the top connecting pipe (604). The lower end of the middle locking block (502) is connected to a bottom connecting pipe (606). The lower outlet of the vent tee (602) is connected to a connecting hose (605). The connecting hose (605) passes through the front stand (102) and connects to the bottom connecting pipe (606). The lower end of the cavity wall of the outer moving core (304) is provided with an outer... The core shifting bottom hole (607) is made so that after the outer core shifting body (304) and the outer core body (303) move into place towards the mandrel outer sleeve (207), the outer core shifting bottom hole (607) is exactly aligned with the top connecting pipe (604). The inner bottom surface of the outer core shifting body (304) is fixed with an inner rotating seat (608), and the inner bottom surface of the outer core body (303) is fixed with an opposing inner rotating seat (609). One end of the axial flow fan wheel (610) is rotatably connected in the inner rotating seat (608). The other end is rotatably connected to the opposing inner rotating seat (609). The middle locking block (502) has a vertically opened inner hole (611) in the middle position. The bottom of the mold base plate (404), mold frame (405), and mold sleeve (406) are all provided with a bottom through hole (612). After the middle locking block (502) moves to the position where the bottom of the mold base plate (404) is close to the locking seat (517), the inner hole (611) and the bottom through hole (612) are aligned.

10. According to claim 3, a nitrogen-assisted aluminum profile extrusion device is provided with a self-starting limit switch (7) installed and fixed on the side of the top plate (104). The self-starting limit switch (7) is electrically connected to the main controller switch (105). After the front end of the mandrel sleeve (207) moves to abut against the rear end of the mold sleeve (406), the front end of the outer frame (206) just triggers the self-starting limit switch (7).

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