Aluminum-based composite material plate extrusion device

Abstract

The invention relates to the technical field of metal extrusion technicians, in particular to an aluminum matrix composite plate extrusion device which comprises a rack, a hydraulic mechanism, a sealing mechanism, an upper die and a lower die. The hydraulic mechanism comprises a cylinder and a piston rod, the cylinder is fixed to the rack, the piston rod is vertically arranged, and the lower end of the piston rod penetrates out of the cylinder. The sealing mechanism comprises an oil storage ring, and a recycling unit, a cleaning unit and an oil supplementing unit which sequentially act on the piston rod from bottom to top are arranged in the oil storage ring. When the piston rod moves upwards and retracts to the cylinder body every time, old oil outside the piston rod is recycled and cleaned, and then new oil is supplemented to the piston rod, so that the situation that the old oil which is in contact with the outside and oxidized on the surface of the piston rod is brought into the cylinder body, and pollution of hydraulic oil in the cylinder body is caused is avoided. When the piston rod moves downwards to extend out of the cylinder body every time, new oil on the piston rod is recycled, and then the recycled old oil is supplemented to the piston rod, so that normal use of the piston rod is not affected, waste of oil liquid can be reduced, and smooth entering and exiting of the piston rod are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of metal extrusion processing, and in particular to an aluminum-based composite material plate extrusion device. Background Art

[0002] Aluminum alloy composite sheet is a multilayer structure material composed of aluminum alloy and other materials (such as ceramics, plastics, metals or fibers, etc.). This material combines the lightweight and high-strength characteristics of aluminum alloy with the excellent properties of other materials, and has good machinability. It can be cut, welded, stamped and other operations can be performed by conventional processing methods. When stamping aluminum-based composite sheet, a hydraulic mechanism is usually used to drive the molds to approach each other to extrude the sheet. The accuracy of the hydraulic mechanism will affect the extrusion state of the two molds, and thus affect the forming quality of the sheet. When the piston rod of the hydraulic mechanism drives one mold to another mold to extrude the sheet, the piston rod will be exposed to the external environment, and some impurities are easily attached to its surface, and the oil film on its surface will oxidize and deteriorate. When it returns to the cylinder body, it will not only cause wear to the sealing ring, but also pollute the oil in the cylinder body, which will eventually affect the movement of the piston rod, making it not smooth to extend and retract, and thus affecting the extrusion quality of the sheet. Summary of the invention

[0003] The invention provides an aluminum-based composite material plate extrusion device to solve the problem that the hydraulic mechanism of the existing extrusion device affects the plate extrusion quality.

[0004] The aluminum-based composite material plate extrusion device of the present invention adopts the following technical solution: An aluminum-based composite material plate extrusion device comprises a frame, a hydraulic mechanism, a sealing mechanism, an upper die and a lower die; the lower die is mounted on the frame and its position on the frame is adjustable; the hydraulic mechanism comprises a cylinder body and a piston rod, the cylinder body is fixed to the frame, the piston rod is vertically arranged and the lower end passes through the cylinder body, and moves up and down when the hydraulic oil in the cylinder body changes; the upper die is located above the lower die and is connected to the lower end of the piston rod, so as to move downward with the piston rod and cooperate with the lower die to extrude the plate; the sealing mechanism comprises a mounting seat, a sealing ring and an oil storage ring, and the mounting seat is fixed to the frame and located at the lower end of the cylinder body; The sealing ring is installed on the lower side of the mounting seat, and is sleeved on the outside of the piston rod with a sealing ring arranged between the piston rod; the oil storage ring is located below the sealing ring, and is connected to the mounting seat and restricted by the mounting seat to move up and down; a recovery unit, a cleaning unit and an oil replenishing unit are arranged in the oil storage ring, which act on the piston rod from bottom to top in sequence; when the piston rod moves upward, the recovery unit sucks the old oil on the piston rod, the cleaning unit blows air to clean the piston rod, and the oil replenishing unit replenishes new oil to the piston rod; when the piston rod moves downward, the oil replenishing unit recovers the new oil outside the piston rod, and the recovery unit replenishes the old oil to the outside of the piston rod again.

[0005] Optionally, a recovery cleaning chamber and an oil replenishing chamber are provided in the oil storage ring, and a first piston member is slidably arranged in the recovery cleaning chamber, and the first piston member divides the recovery cleaning chamber into a cleaning chamber and a recovery chamber that are not connected to each other and are distributed in sequence up and down, and the cleaning chamber is unidirectionally connected to the outside; a first oil circuit and a second oil circuit that are connected to the recovery chamber and the inner ring of the oil storage ring are provided in the oil storage ring, and the first oil circuit and the second oil circuit are both unidirectionally conductive and have opposite conductive directions; a unidirectionally conductive air circuit that is connected to the cleaning chamber and the inner ring of the oil storage ring is also provided in the oil storage ring, and an end of the air circuit that is connected to the inner ring of the oil storage ring is located above an end of the first oil circuit and the second oil circuit that are connected to the inner ring of the oil storage ring; the recovery chamber, the first oil circuit and the second oil circuit constitute the recovery Unit, a cleaning chamber and an air path constitute the cleaning unit; a second piston member is slidably arranged in the oil replenishing chamber, the second piston member divides the oil replenishing chamber into two upper and lower chambers that are not connected to each other, the chamber located at the lower side is connected to the outside, and the chamber located at the upper side is filled with new oil; a third oil path connecting the upper chamber of the oil replenishing chamber and the inner ring of the oil replenishing ring is also opened in the oil storage ring, and the oil replenishing chamber and the third oil path constitute the oil replenishing unit; the sealing mechanism also includes a moving ring and a driving member, the moving ring is arranged between the oil storage ring and the sealing ring, and is connected to the first piston member and the second piston member; the driving member is installed on the sealing ring, and is used to drive the moving ring to move up and down, thereby driving the first piston member and the second piston member to move up and down.

[0006] Optionally, the oil storage ring and the sealing ring are both rotatably connected to the mounting seat, and a power assembly is installed on the mounting seat, which causes the oil storage ring and the sealing ring to rotate synchronously around the piston rod axis before and when the piston rod moves upward.

[0007] Optionally, the power assembly includes a motor and a gear, a gear ring is fixed outside the oil storage ring, the motor is fixed to a mounting seat, the gear is installed on the output shaft of the motor and meshes with the gear ring, thereby driving the oil storage ring to rotate, and the oil storage ring drives the sealing ring to rotate synchronously through the first piston member or the second piston member, the movable ring and the driving member.

[0008] Optionally, the driving member is an electric telescopic cylinder.

[0009] Optionally, a first one-way valve allowing old oil to flow from the recovery chamber to the inner ring of the oil storage ring is installed in the second oil circuit, and a second one-way valve allowing old oil to flow from the inner ring of the oil storage ring to the recovery chamber is installed in the first oil circuit; a filter is also provided in the first oil circuit for filtering the old oil entering the recovery chamber.

[0010] Optionally, an oil replenishing channel is provided on the movable ring, one end of the oil replenishing channel extends to the outer ring of the movable ring, and the other end passes through the second piston member and communicates with the upper chamber of the oil replenishing chamber.

[0011] Optionally, a piston block is slidably installed in the cylinder body, the piston block divides the cylinder body into an upper oil chamber and a lower oil chamber, and the upper end of the piston rod is fixedly connected to the piston block; a connecting port is opened on the cylinder body, which is connected to the upper oil chamber and the lower oil chamber respectively.

[0012] Optionally, the frame includes a base, a sliding rod and a top seat, there are multiple sliding rods, all of which are vertically arranged and connected to the base and the top seat; the cylinder body is fixed to the top seat, and the lower mold is arranged on the base; the piston rod is connected to the upper mold through a sliding block, and the sliding block and the sliding rod are slidably matched.

[0013] Optionally, a horizontally extending guide rail is installed on the base, and the guide rail extends from between two adjacent sliding rods; the lower mold is slidably installed on the guide rail, and is driven by a power member installed on the base to move along the guide rail.

[0014] The beneficial effects of the present invention are as follows: the aluminum-based composite material sheet extrusion device of the present invention sequentially acts on the recovery unit, cleaning unit and oil replenishing unit of the piston rod from bottom to top. Each time the piston rod moves upward and retracts into the cylinder body, the old oil outside the piston rod is first recovered and cleaned, and then new oil is replenished to avoid bringing the old oil on its surface that has been in contact with the outside and oxidized into the cylinder body, causing contamination of the hydraulic oil in the cylinder body. Each time the piston rod moves downward and extends out of the cylinder body, the new oil on the piston rod is first recovered, and then the previously recovered old oil is replenished to the piston rod, which does not affect the normal use of the piston rod, but also reduces the waste of oil and ensures that the piston rod can move in and out smoothly.

[0015] Furthermore, the rotation of the sealing ring can convert the static friction between the piston rod and the sealing ring into dynamic friction, reducing the driving resistance of the piston rod, and at the same time changing the position distribution of the sealing ring on the circumference of the piston rod. When the piston rod is subjected to a load deviating from the axial direction, the circumferential force of the sealing ring can be relatively uniform, reducing the risk of leakage of the sealing ring. The rotation of the oil storage ring can change the position of the recovery unit, cleaning unit and oil replenishment unit on the piston rod, so that the sealing mechanism can evenly recover the old oil, clean and replenish new oil on the circumference of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of an aluminum-based composite material plate extrusion device of the present invention; Figure 2 It is a schematic cross-sectional view of the overall structure of an embodiment of an aluminum-based composite material plate extrusion device of the present invention; Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle; Figure 4 It is a cross-sectional schematic diagram of an oil storage ring in an embodiment of an aluminum-based composite material plate extrusion device of the present invention; Figure 5 It is a schematic cross-sectional view of another cross section of an oil storage ring in an embodiment of an aluminum-based composite material plate extrusion device of the present invention; Figure 6 It is a rotational cross-sectional schematic diagram of a sealing mechanism in an embodiment of an aluminum-based composite material plate extrusion device of the present invention; In the figure: 110, base; 111, guide rail; 120, sliding rod; 130, top seat; 140, power part; 200, hydraulic mechanism; 210, cylinder; 220, piston block; 230, piston rod; 240, sliding block; 300, sealing mechanism; 310, mounting seat; 320, sealing ring; 321, sealing ring; 330, moving ring; 331, oil replenishment channel; 340, oil storage ring; 341, first piston part; 342, cleaning chamber; 343, recovery chamber; 344, first oil circuit; 345, second oil circuit; 346, air circuit; 347, oil replenishment chamber; 348, third oil circuit; 349, second piston part; 351, motor; 352, gear; 353, gear ring; 360, driving part; 400, upper mold; 500, lower mold. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] An embodiment of an aluminum-based composite material plate extrusion device of the present invention is as follows Figures 1 to 6 As shown, it includes a frame, a hydraulic mechanism 200 , a sealing mechanism 300 , an upper mold 400 and a lower mold 500 .

[0020] The lower mold 500 is installed on the frame, and its position on the frame is adjustable.

[0021] The hydraulic mechanism 200 includes a cylinder body 210 and a piston rod 230 . The cylinder body 210 is fixed to a frame. The piston rod 230 is vertically arranged with its lower end passing through the cylinder body 210 and moves up and down when the hydraulic oil in the cylinder body 210 changes.

[0022] The upper die 400 is located above the lower die 500 and is connected to the lower end of the piston rod 230 so as to move downward with the piston rod 230 and cooperate with the lower die 500 to extrude the plate.

[0023] The sealing mechanism 300 includes a mounting seat 310, a sealing ring 320 and an oil storage ring 340. The mounting seat 310 is fixed to the frame and is located at the lower end of the cylinder body 210. The sealing ring 320 is installed on the lower side of the mounting seat 310, and is sleeved on the outside of the piston rod 230 and a sealing ring 321 is provided between the piston rod 230. Specifically, there are at least two sealing rings 321, and the inner ring of the sealing ring 320 is provided with a plurality of annular grooves for installing the sealing ring 321, so that two adjacent sealing rings 321 are spaced apart along the axial direction of the piston rod 230. The oil storage ring 340 is located below the sealing ring 320, and is connected to the mounting seat 310 and restricted by the mounting seat 310 from moving up and down; a recovery unit, a cleaning unit and an oil replenishing unit are provided in the oil storage ring 340, which act on the piston rod 230 in sequence from bottom to top; when the piston rod 230 moves upward, the recovery unit sucks the old oil on the piston rod 230, the cleaning unit blows air to clean the piston rod 230, and the oil replenishing unit replenishes the piston rod 230 with new oil; when the piston rod 230 moves downward, the oil replenishing unit recovers the new oil outside the piston rod 230, and the recovery unit replenishes the old oil to the outside of the piston rod 230 again.

[0024] By sequentially acting on the recovery unit, cleaning unit and oil replenishing unit of the piston rod 230 from bottom to top, each time the piston rod 230 moves upward and retracts into the cylinder body 210, the old oil outside the piston rod 230 is first recovered and cleaned, and then new oil is replenished to avoid the old oil on its surface that has been in contact with the outside and oxidized from being brought into the cylinder body 210, causing contamination of the hydraulic oil in the cylinder body 210. Each time the piston rod 230 moves downward and extends out of the cylinder body 210, the new oil on the piston rod 230 is first recovered, and then the previously recovered old oil is replenished to the piston rod 230, which does not affect the normal use of the piston rod 230, but also reduces the waste of oil and ensures that the piston rod 230 can move in and out smoothly.

[0025] In this embodiment, a recovery cleaning chamber and an oil replenishing chamber 347 are provided in the oil storage ring 340, and a first piston member 341 is slidably arranged in the recovery cleaning chamber. The first piston member 341 divides the recovery cleaning chamber into a cleaning chamber 342 and a recovery chamber 343 which are not connected to each other and are distributed in sequence up and down, and the cleaning chamber 342 is connected to the outside in one direction; specifically, an air outlet connected to the outside is provided on the cleaning chamber 342, and a third one-way valve is provided at the air outlet, which only allows gas to enter the cleaning chamber 342 from the outside. The oil storage ring 340 is provided with a first oil circuit 344 and a second oil circuit 345 connecting the recovery chamber 343 and the inner ring of the oil storage ring 340, and the first oil circuit 344 and the second oil circuit 345 are both unidirectional and have opposite directions of conduction; the oil storage ring 340 is also provided with a unidirectional air circuit 346 connecting the cleaning chamber 342 and the inner ring of the oil storage ring 340, and one end of the air circuit 346 connected to the inner ring of the oil storage ring 340 is located above one end of the first oil circuit 344 and the second oil circuit 345 connected to the inner ring of the oil storage ring 340; specifically, the second oil circuit 345 is provided with a first one-way valve allowing old oil to flow from the recovery chamber 343 to the inner ring of the oil storage ring 340, and the first oil circuit 344 is provided with a second one-way valve allowing old oil to flow from the inner ring of the oil storage ring 340 to the recovery chamber 343; the second oil circuit 345 is also provided with a filter for filtering the old oil entering the recovery chamber 343. A fourth one-way valve is provided in the gas circuit 346, which only allows gas to flow from the cleaning chamber 342 to the inner ring of the oil storage ring 340. The recovery chamber 343, the first oil circuit 344 and the second oil circuit 345 constitute the recovery unit, and the cleaning chamber 342 and the gas circuit 346 constitute the cleaning unit. A second piston member 349 is slidably provided in the oil replenishment chamber 347, and the second piston member 349 divides the oil replenishment chamber 347 into two upper and lower chambers that are not connected to each other. The lower chamber is connected to the outside, and the upper chamber is filled with new oil. The oil storage ring 340 is also provided with a third oil circuit 348 that connects the upper chamber of the oil replenishment chamber 347 and the inner ring of the oil storage ring 340. The oil replenishment chamber 347 and the third oil circuit 348 constitute the oil replenishment unit. The sealing mechanism 300 further includes a moving ring 330 and a driving member 360. The moving ring 330 is disposed between the oil storage ring 340 and the sealing ring 320, and is connected to the first piston member 341 and the second piston member 349. The driving member 360 is an electric telescopic cylinder, which is installed on the sealing ring 320 and is used to drive the moving ring 330 to move up and down, thereby driving the first piston member 341 and the second piston member 349 to move up and down.

[0026] When the piston rod 230 moves upward, the driving member 360 drives the moving ring 330 to move upward, driving the first piston member 341 and the second piston member 349 to move upward synchronously, the first piston member 341 squeezes the cleaning chamber 342 and increases the volume of the recovery chamber 343, the recovery chamber 343 sucks the old oil on the piston rod 230 into the recovery chamber 343 through the first oil path 344, and at the same time, the gas in the cleaning chamber 342 is blown to the piston rod 230 through the gas path 346 to clean the surface of the piston rod 230. The second piston member 349 squeezes the upper chamber in the oil replenishment chamber 347, so that the new oil in the oil replenishment chamber 347 flows to the piston rod 230 through the third oil path 348, replenishing the piston rod 230 with new oil. When the piston rod 230 moves downward, the driving member 360 drives the moving ring 330 to move downward, driving the first piston member 341 and the second piston member 349 to move downward synchronously. The second piston member 349 increases the volume of the chamber located above in the oil replenishing chamber 347, and then sucks the new oil outside the piston rod 230 into the chamber located above in the oil replenishing chamber 347 through the third oil path 348. The first piston member 341 squeezes the recovery chamber 343 and increases the volume of the cleaning chamber 342. The external gas enters the cleaning chamber 342, and the old oil in the recovery chamber 343 flows to the piston rod 230 through the second oil path 345, replenishing the old oil to the piston rod 230. In order to ensure the oil replenishment and oil collection effect of the sealing mechanism 300 on the piston rod 230 during the movement of the piston rod 230, the driving member 360 can be started before the movement of the piston rod 230, or started synchronously with the movement of the piston rod 230, and stopped synchronously with the piston rod 230. The start and stop of the driving member 360 can be linked with the start and stop of the piston rod 230 through program control, and the speed at which the driving member 360 drives the movable ring 330 to move up and down can be determined according to the length of the piston rod 230 extended and retracted.

[0027] In this embodiment, a plurality of first oil passages 344, second oil passages 345, gas passages 346 and third oil passages 348 are arranged at intervals in the circumferential direction around the oil storage ring 340. The gas passage 346 is inclined downward from the cleaning chamber 342 to the inner ring of the oil storage ring 340, and the second oil passage 345 is inclined upward from the recovery chamber 343 to the inner ring of the oil storage ring 340.

[0028] In this embodiment, the oil storage ring 340 and the sealing ring 320 are both rotatably connected to the mounting seat 310, and a power assembly is installed on the mounting seat 310. The power assembly causes the oil storage ring 340 and the sealing ring 320 to rotate synchronously around the axis of the piston rod 230 before and when the piston rod 230 moves upward. The rotation of the sealing ring 320 can convert the static friction between the piston rod 230 and the sealing ring 321 into dynamic friction, reduce the driving resistance of the piston rod 230, and change the position distribution of the sealing ring 321 in the circumferential direction of the piston rod 230. When the piston rod 230 is subjected to a load deviating from the axial direction, the circumferential force of the sealing ring 321 can be relatively uniform, reducing the risk of leakage of the sealing ring 321. The rotation of the oil storage ring 340 can change the action position of the recovery unit, the cleaning unit and the oil replenishing unit on the piston rod 230, so that the sealing mechanism 300 can uniformly recover the old oil, clean and replenish the new oil in the circumferential direction of the piston rod 230.

[0029] In this embodiment, the power assembly includes a motor 351 and a gear 352. A ring gear 353 is fixed outside the oil storage ring 340. The motor 351 is fixed to the mounting seat 310. The gear 352 is installed on the output shaft of the motor 351 and meshes with the ring gear 353, thereby driving the oil storage ring 340 to rotate. The oil storage ring 340 drives the sealing ring 320 to rotate synchronously through the first piston member 341 or the second piston member 349, the movable ring 330 and the driving member 360.

[0030] In this embodiment, a cover is fixed to the outside of the mounting seat 310, and the sealing ring 320, the oil storage ring 340, the power assembly, the moving ring 330 and the driving member 360 are all arranged in the cover.

[0031] In this embodiment, an oil replenishment channel 331 is provided on the movable ring 330, one end of the oil replenishment channel 331 extends to the outer ring of the movable ring 330, and the other end passes through the second piston member 349 and communicates with the upper chamber of the oil replenishment chamber 347. The oil replenishment channel 331 is in a normally closed state and is opened periodically to replenish the oil in the oil replenishment chamber 347.

[0032] In this embodiment, a piston block 220 is slidably mounted in the cylinder body 210, and the piston block 220 divides the cylinder body 210 into an upper oil chamber and a lower oil chamber. The upper end of the piston rod 230 is fixedly connected to the piston block 220. The cylinder body 210 is provided with a connecting hole that is connected to the upper oil chamber and the lower oil chamber respectively. By injecting or pumping oil into the upper oil chamber and the lower oil chamber through the connecting hole, the pressure of the upper oil chamber and the lower oil chamber can be changed, so that the piston block 220 drives the piston rod 230 to move up and down.

[0033] In this embodiment, the frame includes a base 110, a sliding rod 120 and a top seat 130. There are multiple sliding rods 120, all of which are vertically arranged and connect the base 110 and the top seat 130; the cylinder body 210 is fixed to the top seat 130, and the lower mold 500 is arranged on the base 110; the piston rod 230 is connected to the upper mold 400 through the sliding block 240, and the sliding block 240 is slidably matched with the sliding rod 120.

[0034] In this embodiment, a horizontally extending guide rail 111 is installed on the base 110, and the guide rail 111 extends from between two adjacent sliding rods 120; the lower mold 500 is slidably installed on the guide rail 111, and is driven by a power member 140 installed on the base 110 to move along the guide rail 111. The power member 140 is an electric telescopic cylinder.

[0035] When the aluminum-based composite material sheet extrusion device of the present invention is used, the position of the lower die 500 on the guide rail 111 is adjusted to correspond to the upper die 400, the sheet to be extruded is placed on the lower die 500, oil is injected into the upper oil chamber through the connecting hole, and oil is pumped from the lower oil chamber, so that the piston block 220 drives the piston rod 230 to move downward, and the piston rod 230 drives the upper die 400 to move downward through the sliding block 240, and works together with the lower die 500 to extrude the sheet. Before the piston rod 230 moves downward, the power assembly drives the oil storage ring 340 to rotate, and the oil storage ring 340 drives the sealing ring 320 to rotate synchronously through the first piston member 341 or the second piston member 349, the moving ring 330 and the driving member 360, thereby reducing the movement resistance between the sealing ring 321 and the piston rod 230. When the piston rod 230 moves downward, the driving member 360 drives the moving ring 330 to move downward, driving the first piston member 341 and the second piston member 349 to move downward synchronously. The second piston member 349 increases the volume of the chamber located above in the oil replenishing chamber 347, and then sucks the new oil outside the piston rod 230 into the chamber located above in the oil replenishing chamber 347 through the third oil path 348. The first piston member 341 squeezes the recovery chamber 343 and increases the volume of the cleaning chamber 342. The external gas enters the cleaning chamber 342, and the old oil in the recovery chamber 343 flows to the piston rod 230 through the second oil path 345, replenishing the old oil to the piston rod 230. And the oil storage ring 340 rotates around the piston rod 230, so that the new oil on the piston rod 230 is fully recovered by the oil replenishing chamber 347, and the old oil in the recovery chamber 343 is fully replenished to the piston rod 230.

[0036] After the extrusion is completed, the piston rod 230 drives the upper mold 400 to move upward through the sliding block 240. When the piston rod 230 moves upward, the driving member 360 drives the moving ring 330 to move upward, driving the first piston member 341 and the second piston member 349 to move upward synchronously. The first piston member 341 squeezes the cleaning chamber 342 and increases the volume of the recovery chamber 343. The recovery chamber 343 sucks the old oil on the piston rod 230 into the recovery chamber 343 through the first oil passage 344. At the same time, the gas in the cleaning chamber 342 is blown to the piston rod 230 through the gas passage 346 to clean the surface of the piston rod 230. The second piston member 349 squeezes the upper chamber in the oil replenishing chamber 347, so that the new oil in the oil replenishing chamber 347 flows to the piston rod 230 through the third oil passage 348, replenishing the piston rod 230 with new oil.

[0037] In some extrusion processes, the upper die 400 usually needs to maintain pressure for a certain period of time to stabilize the sheet material. When the piston rod 230 extends out of the cylinder body 210, the recovery chamber 343 covers it with a layer of oil film formed by old oil to prevent it from being rusted due to oxidation when exposed to the outside world. When the piston rod 230 returns to the cylinder body 210, the old oil is recovered and covered with a layer of oil film formed by new oil, which can reduce the wear between it and the sealing ring 321, making it move more smoothly, and will not pollute the oil inside the cylinder body 210, affecting the use effect and life of the hydraulic mechanism 200.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An aluminum-based composite material sheet extrusion device, characterized in that: It includes a frame, a hydraulic mechanism, a sealing mechanism, an upper mold and a lower mold; The lower mold is installed on the frame, and its position on the frame is adjustable; The hydraulic mechanism includes a cylinder body and a piston rod. The cylinder body is fixed to the frame. The piston rod is vertically arranged with the lower end passing through the cylinder body and moves up and down when the hydraulic oil in the cylinder body changes. The upper die is located above the lower die and is connected to the lower end of the piston rod so as to move downward with the piston rod and cooperate with the lower die to extrude the sheet; The sealing mechanism includes a mounting seat, a sealing ring and an oil storage ring. The mounting seat is fixed to the frame and located at the lower end of the cylinder body; the sealing ring is installed on the lower side of the mounting seat, and is sleeved on the outside of the piston rod and a sealing ring is arranged between the piston rod; the oil storage ring is located below the sealing ring, and is connected to the mounting seat and is restricted by the mounting seat to move up and down; a recovery unit, a cleaning unit and an oil replenishing unit are arranged in the oil storage ring, which act on the piston rod from bottom to top in sequence; when the piston rod moves upward, the recovery unit sucks the old oil on the piston rod, the cleaning unit blows air to clean the piston rod, and the oil replenishing unit replenishes the piston rod with new oil; when the piston rod moves downward, the oil replenishing unit recovers the new oil outside the piston rod, and the recovery unit replenishes the old oil to the outside of the piston rod again.

2. The aluminum-based composite material sheet extrusion device according to claim 1, characterized in that: A recovery cleaning chamber and an oil replenishing chamber are provided in the oil storage ring, and a first piston member is slidably arranged in the recovery cleaning chamber, and the first piston member divides the recovery cleaning chamber into a cleaning chamber and a recovery chamber which are not connected to each other and are successively distributed up and down, and the cleaning chamber is unidirectionally connected to the outside; a first oil circuit and a second oil circuit which are connected to the recovery chamber and the inner ring of the oil storage ring are provided in the oil storage ring, and the first oil circuit and the second oil circuit are both unidirectionally conductive and have opposite conductive directions; a unidirectionally conductive air circuit which is connected to the cleaning chamber and the inner ring of the oil storage ring is also provided in the oil storage ring, and an end of the air circuit which is connected to the inner ring of the oil storage ring is located above an end of the first oil circuit and the second oil circuit which are connected to the inner ring of the oil storage ring; the recovery chamber, the first oil circuit and the second oil circuit constitute the recovery unit The cleaning chamber and the air path constitute the cleaning unit; a second piston member is slidably arranged in the oil replenishing chamber, and the second piston member divides the oil replenishing chamber into two upper and lower chambers that are not connected to each other. The chamber located at the lower part is connected to the outside, and the chamber located at the upper part is filled with new oil; a third oil path connecting the upper chamber of the oil replenishing chamber and the inner ring of the oil replenishing ring is also opened in the oil storage ring, and the oil replenishing chamber and the third oil path constitute the oil replenishing unit; the sealing mechanism also includes a moving ring and a driving member, the moving ring is arranged between the oil storage ring and the sealing ring, and is connected to the first piston member and the second piston member; the driving member is installed on the sealing ring, and is used to drive the moving ring to move up and down, thereby driving the first piston member and the second piston member to move up and down.

3. The aluminum-based composite material sheet extrusion device according to claim 2, characterized in that: The oil storage ring and the sealing ring are both rotatably connected to the mounting seat, and a power assembly is installed on the mounting seat. The power assembly causes the oil storage ring and the sealing ring to rotate synchronously around the piston rod axis before and when the piston rod moves upward.

4. The aluminum-based composite material sheet extrusion device according to claim 3, characterized in that: The power assembly includes a motor and a gear. A gear ring is fixed outside the oil storage ring. The motor is fixed to a mounting seat. The gear is installed on the output shaft of the motor and meshes with the gear ring, thereby driving the oil storage ring to rotate. The oil storage ring drives the sealing ring to rotate synchronously through the first piston member or the second piston member, the moving ring and the driving member.

5. The aluminum-based composite material sheet extrusion device according to claim 2, characterized in that: The driving part is an electric telescopic cylinder.

6. The aluminum-based composite material plate extrusion device according to claim 2, characterized in that: The second oil circuit is installed with a first one-way valve that allows old oil to flow from the recovery chamber to the inner ring of the oil storage ring, and the first oil circuit is installed with a second one-way valve that allows old oil to flow from the inner ring of the oil storage ring to the recovery chamber; a filter is also provided in the first oil circuit for filtering the old oil entering the recovery chamber.

7. The aluminum-based composite material plate extrusion device according to claim 2, characterized in that: An oil replenishing channel is provided on the movable ring, one end of the oil replenishing channel extends to the outer ring of the movable ring, and the other end passes through the second piston member to communicate with the chamber located above the oil replenishing chamber.

8. The aluminum-based composite material plate extrusion device according to claim 1, characterized in that: A piston block is slidably installed in the cylinder body, and the piston block divides the cylinder body into an upper oil chamber and a lower oil chamber. The upper end of the piston rod is fixedly connected to the piston block; and a connecting port is opened on the cylinder body, which is connected with the upper oil chamber and the lower oil chamber respectively.

9. The aluminum-based composite material plate extrusion device according to claim 1, characterized in that: The frame includes a base, a sliding rod and a top seat. There are multiple sliding rods, all of which are vertically arranged and connected to the base and the top seat; the cylinder body is fixed to the top seat, and the lower mold is arranged on the base; the piston rod is connected to the upper mold through a sliding block, and the sliding block and the sliding rod are slidably matched.

10. The aluminum-based composite material plate extrusion device according to claim 1, characterized in that: A horizontally extending guide rail is installed on the base, and the guide rail extends from between two adjacent sliding rods; the lower mold is slidably installed on the guide rail, and is driven by a power member installed on the base to move along the guide rail.

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