Stainless steel die for extrusion molding of aluminum profile

Abstract

The invention relates to the technical field of aluminum profile extrusion dies, and discloses a stainless steel die for aluminum profile extrusion molding, which comprises an upper die, a lower die, a buffer unit and a cooling unit, wherein shunting holes are formed in the upper die, a welding chamber is formed in one end of the lower die, a die outlet is formed in the other end of the lower die, and a plurality of sinking grooves are formed in the side face of the upper die. The stable low-temperature environment in the cooling cylinder is ensured, the cooling and curing effect of the aluminum profile is further improved, the situation that the formed aluminum profile deforms or cracks is avoided, in addition, power is directly provided for operation of the pumping assembly through movement of the aluminum profile, an external liquid pump is not needed, investment of additional equipment is reduced, and the production cost is reduced. And the operation cost of the device is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum profile extrusion dies, and particularly to a stainless steel die for aluminum profile extrusion molding. Background Art

[0002] A stainless steel die for aluminum profile extrusion molding is a die specifically designed for an aluminum profile extruder, made of materials such as stainless steel with high strength and high wear resistance. It can extrude molten aluminum through the cavity of the die to form aluminum profiles with specific cross-sectional shapes, dimensions, and mechanical properties.

[0003] After retrieval, Chinese Patent with Publication No. CN218452504U discloses a cooling mechanism for an aluminum profile extrusion molding die. The aluminum profile extrusion molding die is installed at the discharge end of the output end of the extruder, and the cooling mechanism is installed outside the aluminum profile extrusion molding die. The cooling mechanism includes an outer cover, and the outer cover is connected with a uniform cooling component; the inner wall of the end of the outer cover is in sliding connection with the outer wall of the aluminum profile extrusion molding die in a fitting manner; the cooling component includes an inlet pipe, an outlet pipe, spray holes, a spiral pipe, and straight holes. A straight hole is opened at the bottom of one end of the outer cover, and the outer cover is fixedly connected with the outlet pipe at the outer end of the straight hole; through the above method, the above solution enters the spiral pipe through the inlet pipe of the cooling component, and then sprays out evenly from the spray holes. The evenly sprayed refrigerant fully and evenly contacts the outer wall of the aluminum profile extrusion molding die, which is beneficial to the rapid and uniform cooling of the aluminum profile extrusion molding die, beneficial to controlling the set temperature of the aluminum profile extrusion molding die, and beneficial to ensuring the forming quality of the aluminum profile. However, when the above solution is actually used, there are still the following deficiencies:

[0004] The above solution cools and reduces the temperature of the extruded aluminum profile by arranging a spiral pipe inside the outer cover. The spiral pipe is sleeved on the entire die. Since the spiral pipe covers the entire die, the cooling effect not only acts on the extruded aluminum profile, but also acts in advance on the stage before the aluminum rod is pressed into the die core. This will cause the aluminum rod to start cooling and solidifying before it completely enters the die cavity, increasing the extrusion force exerted on the die during the extrusion process. This additional pressure will accelerate the wear of the die and shorten its service life. In addition, although rapid cooling helps the shaping of the aluminum profile, premature cooling and solidification may lead to uneven stress distribution inside the aluminum profile, affecting its mechanical properties and surface quality. Especially when the aluminum rod has not been completely shaped into the required shape and starts to cool, it may cause defects such as cracks and deformation in the aluminum profile. Secondly, the flow of the refrigerant in the spiral pipe needs to be driven by an external liquid pump, which not only increases the complexity and energy consumption of the equipment, but also raises the production cost.

[0005] Therefore, it is necessary to design a stainless steel die for aluminum profile extrusion molding to solve the above problems. Summary of the Invention

[0006] The object of the present invention is to solve the deficiencies existing in the prior art, and a stainless - steel mold for aluminum profile extrusion molding is proposed.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A stainless - steel mold for aluminum profile extrusion molding, comprising an upper mold, a lower mold, a buffer unit and a cooling unit;

[0009] Among them, a shunt hole is opened on the upper mold, a welding chamber is opened at one end of the lower mold, and an outlet is opened at the other end. A plurality of sinking grooves are opened on the side surface of the upper mold;

[0010] Among them, the buffer unit is arranged on the upper mold. The buffer unit is composed of a buffer component, a fixed frame, a plurality of sliding components and a plurality of pushing components. The buffer component includes a buffer plate and a plurality of blocking structures. The plurality of blocking structures are circumferentially and array - distributed on the buffer plate. The fixed frame is fixed on the upper mold through a plurality of fixing rods. A plurality of avoidance openings are opened on the fixed frame, and the plurality of avoidance openings are respectively arranged opposite to the plurality of sinking grooves. The plurality of sliding components are circumferentially and array - distributed on the inner ring of the fixed frame. The plurality of blocking structures are respectively arranged opposite to the plurality of sliding structures. The plurality of pushing components are respectively arranged on the plurality of sliding components;

[0011] Among them, the cooling unit is composed of a cooling cylinder, a cooling component, a driving component, two pumping components and a temperature - reducing component. One end of the cooling cylinder is open - ended, and the other end is closed. The open - ended end of the cooling cylinder is fixed on the side surface of the lower mold. An outlet is opened at the closed end of the cooling cylinder. A heat - insulating curtain is fixed on the inner top surface of the outlet. The cooling component, the driving component, the two pumping components and the temperature - reducing component are all arranged on the cooling cylinder. One of the pumping components is used for pumping liquid, and the other pumping component is used for pumping gas.

[0012] As a preferred technical solution of the present invention, the buffer component further includes a buffer box and an annular sliding plate. The buffer box is fixed on the outer peripheral surface of the upper mold. The buffer box is of an annular structure and stores oil liquid inside. A plurality of holes are opened on the side surface of the buffer box. The annular sliding plate is slidably arranged inside the buffer box. The annular sliding plate is immersed in the oil liquid. A plurality of through - holes are opened on the annular sliding plate. The annular sliding plate is connected to the inner surface of the buffer box through buffer springs. The annular sliding plate is connected to the annular plate through a plurality of connecting rods. The plurality of connecting rods respectively pass through the plurality of holes, and the connecting rods are hermetically and slidably connected in the holes.

[0013] As a preferred technical solution of the present invention, the blocking structure includes a first limiting frame, a buffer plate and a tension spring. The first limiting frame is fixed on the side surface of the annular plate. The buffer plate is slidably assembled on the first limiting frame. One end of the tension spring is connected to the first limiting frame, and the other end is connected to the end position of the buffer plate.

[0014] As a preferred technical solution of the present invention, an installation opening is formed at one end of the buffer plate away from the tension spring. An installation seat is fixed in the installation opening, and rolling balls are arranged on the installation seat.

[0015] As a preferred technical solution of the present invention, the sliding structure includes a second limiting frame, a sliding plate, a through opening, a movable rod, a fixed block and a clamping block. The second limiting frame is fixed on the inner ring of the fixed frame. The sliding plate is slidably assembled on the second limiting frame. Limiting convex strips are fixed at both ends of the sliding plate. The through opening is formed in the sliding plate. The movable rod is slidably arranged in the through opening. The fixed block is fixed at one end of the movable rod away from the sliding plate, and a card slot is formed on the side surface of the fixed block. The clamping block is fixed at one end of the buffer plate close to the fixed frame. The clamping block is arranged opposite to the card slot, and the cross sections of the clamping block and the card slot are both in a T-shaped structure.

[0016] As a preferred technical solution of the present invention, the pushing assembly includes a fixed frame, an outer cylinder, a top rod and a connecting block. The fixed frame is fixed on the side surface of the sliding plate, and the fixed frame is in an L-shaped structure. The outer cylinder is fixed at one end of the fixed frame away from the sliding plate. One end of the outer cylinder is open. The top rod is movably inserted into the outer cylinder. The top rod is connected to the outer cylinder through a boosting spring. The connecting block is fixed on the movable rod. One end of the top rod extends to the outside of the outer cylinder and is fixedly connected to the connecting block.

[0017] As a preferred technical solution of the present invention, the cooling assembly includes an outer layer pipe, an inner layer pipe and a jet pipe. The outer layer pipe is fixed inside the cooling cylinder. The inner layer pipe is fixed inside the outer layer pipe. A liquid flow area is formed between the outer layer pipe and the inner layer pipe. One end of the inner layer pipe extends to the outside of the outer layer pipe. The jet pipe is fixed inside the cooling cylinder and is arranged opposite to the discharge port. A plurality of jet orifices are formed on the jet pipe. One end of the inner layer pipe located outside the outer layer pipe is connected to the jet pipe through a hose. The liquid flow area, the pumping assembly for pumping liquid and the cooling assembly together form a liquid flow path. The inner layer pipe, the gas pumping assembly for pumping gas and the jet pipe together form a gas flow path.

[0018] As a preferred technical solution of the present invention, the driving assembly includes a wheel frame, a wheel shaft, a roller, an adjusting screw and two guide rods. The wheel frame is arranged inside the cooling cylinder. The wheel shaft is rotatably assembled on the wheel frame. The roller is fixedly sleeved on the wheel shaft. The adjusting screw passes through the cooling cylinder and is in threaded connection with the cooling cylinder. One end of the adjusting screw located inside the cooling cylinder is rotatably installed on the wheel frame. Both of the two guide rods pass through the cooling cylinder and are in sliding connection with the cooling cylinder. One end of each of the two guide rods located inside the cooling cylinder is fixed on the wheel frame. A hexagonal nut is fixed to the end of the adjusting screw located outside the cooling cylinder.

[0019] As a preferred technical solution of the present invention, the pumping assembly includes an installation cylinder, a rotating block, a moving block and an elastic expansion bladder. The installation cylinder is fixed on the wheel frame through a bracket. The rotating block and the moving block are both arranged inside the installation cylinder. The rotating block is rotatably assembled inside the installation cylinder. The moving block is slidably assembled inside the installation cylinder. The rotating block is fixedly connected to the end of the wheel shaft. A limiting block is fixed on the moving block. A limiting groove is formed on the outer peripheral surface of the installation cylinder. The limiting block is slidably arranged in the limiting groove. One end of the elastic expansion bladder is connected to the inner surface of the installation cylinder, and the other end is connected to the moving block. Two installation pipes are connected to the elastic expansion bladder. One-way valves are installed on both of the two installation pipes. The flow-limiting directions of the two one-way valves are opposite;

[0020] The rotating block and the moving block together form a cylindrical structure. The rotating block and the moving block are of the same size. Bevels are provided at the opposite ends of the rotating block and the moving block.

[0021] As a preferred technical solution of the present invention, the temperature-lowering assembly includes a cooling seat and a semiconductor refrigeration sheet. The cooling seat is fixed on the outer peripheral surface of the cooling cylinder. The inside of the cooling seat is hollow. An assembly opening is formed on the top surface of the cooling seat. The assembly opening is communicated with the inside of the cooling seat. The semiconductor refrigeration sheet is installed in the assembly opening. The refrigerating surface of the semiconductor refrigeration sheet extends into the inside of the cooling seat. The heat-conducting surface of the semiconductor refrigeration sheet faces the outside of the cooling seat. Heat dissipation fins are fixed on the heat-conducting surface of the semiconductor refrigeration sheet.

[0022] The present invention has the following beneficial effects:

[0023] 1. Through the innovative design of the buffer unit, the protection performance and service life of the mold are significantly improved. During the extrusion molding process of the aluminum rod, the buffer unit effectively absorbs the impact force before the aluminum rod contacts the upper mold through the chain reaction of several buffer plates, annular plates, connecting rods and annular sliding plates. This design not only reduces the force generated when the aluminum rod directly collides with the upper mold, playing a key protective role for the upper mold, but also further enhances the buffer effect through the oil damping effect;

[0024] 2. By setting the sliding component and the pushing component, it is ensured that when the buffer plate moves to the position facing the upper die sinking groove, it can move synchronously and automatically in the direction away from the center of the annular plate, so as to separate from the aluminum rod, avoiding the obstruction of the buffer plate to the aluminum rod entering the upper die shunt hole. This design not only ensures the smooth feeding of the aluminum rod, but also ensures the continuous buffering effect of the buffer unit before the aluminum rod contacts the upper die, effectively reducing the impact force and protecting the upper die. Through the precise cooperation of the sliding component and the pushing component, and the linkage effect of the movable rod, the fixed block and the clamping block, the automatic separation between the buffer plate and the aluminum rod is realized;

[0025] 3. The ball can significantly reduce the friction force generated between the aluminum rod and the buffer plate. This characteristic ensures that when the buffer plate moves in the direction away from the center of the annular plate under the push of the aluminum rod, the ball can roll smoothly under the action of the friction force, thereby ensuring that the buffer plate can be separated from the aluminum rod smoothly and stably;

[0026] 4. The refrigerant circulating in the outer layer tube performs liquid cooling and temperature reduction on the inside of the cooling cylinder, directly and efficiently taking away the heat of the aluminum profile. At the same time, the refrigerant in the inner layer tube cools the gas flowing in the tube. These cooled gases are then re-injected into the cooling cylinder through multiple air jet ports to form an air cooling effect, further enhancing the temperature reduction efficiency inside the cooling cylinder. The combination of liquid cooling and air cooling not only ensures that a stable low-temperature environment is maintained inside the cooling cylinder, but also improves the temperature reduction and curing effect of the aluminum profile, avoiding deformation or cracking of the formed aluminum profile;

[0027] 5. The operation of the pumping component is directly powered by the movement of the aluminum profile, without relying on an external liquid pump, reducing the investment in additional equipment and lowering the operating cost of the device;

[0028] 6. The heat preservation curtain arranged in the discharge port and the ingenious layout of the air injection pipe together constitute an efficient mechanism to prevent cold air from escaping. The heat preservation curtain is composed of several curtain belts made of flexible materials. When the aluminum profile passes through the discharge port, only the corresponding curtain belt is pushed, and the remaining curtain belts keep blocking the discharge port. This design significantly reduces the loss of cold air inside the cooling cylinder. At the same time, the air injection pipe is arranged facing the discharge port, and the air injection direction is from the discharge port to the inside of the cooling cylinder. Such a layout further hinders the escape of cold air through the discharge port, effectively maintaining the low-temperature environment inside the cooling cylinder. This design improves the cooling efficiency and ensures the cooling and curing quality of the aluminum profile;

[0029] 7. When the refrigerant flows through the cooling seat, the semiconductor refrigeration sheet can effectively further cool down the refrigerant, ensuring that the circulating refrigerant always maintains a sufficiently low temperature, which is crucial for maintaining the low-temperature environment inside the cooling cylinder. At the same time, the heat-conducting surface of the semiconductor refrigeration sheet extends to the outside of the cooling seat, facilitating heat dissipation and further enhancing the refrigeration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 FIG. is a schematic structural diagram of a stainless-steel mold for aluminum profile extrusion proposed by the present invention;

[0031] Figure 2 FIG. is an exploded structural diagram of the upper mold, lower mold, buffer unit and cooling unit;

[0032] Figure 3 FIG. is an exploded structural diagram of the upper mold, lower mold, buffer unit and cooling unit from another perspective;

[0033] Figure 4 FIG. is a schematic structural diagram of the cooling unit;

[0034] Figure 5 FIG. is a schematic structural diagram of the buffer unit;

[0035] Figure 6 FIG. is a partial structural sectional view of the buffer unit;

[0036] Figure 7 FIG. is a sectional structural schematic diagram of the sliding component and the pushing component;

[0037] Figure 8 FIG. is a sectional structural schematic diagram of the cooling cylinder;

[0038] Figure 9 FIG. is a sectional structural schematic diagram of the driving component;

[0039] Figure 10 FIG. is a structural diagram of the rotating block, moving block and elastic expansion bladder;

[0040] Figure 11 FIG. is Figure 1 an enlarged view of the structure at A of

[0041] Figure 12 FIG. is Figure 4 an enlarged view of the structure at B of

[0042] Figure 13 FIG. is Figure 5 an enlarged view of the structure at C of

[0043] Figure 14 FIG. is Figure 8 an enlarged view of the structure at D of

[0044] Figure 15 For Figure 9 the enlarged view of the structure at position E of

[0045] In the figure: 1. Upper die; 11. Shunt hole; 2. Lower die; 22. Welding chamber; 23. Die outlet; 31. Buffer box; 32. Ring-shaped slide plate; 33. Through hole; 34. Buffer spring; 35. Connecting rod; 36. Ring-shaped plate; 41. First limiting frame; 42. Buffer plate; 43. Installation port; 44. Installation seat; 45. Ball; 46. Tension spring; 51. Fixed rod; 52. Fixed frame; 53. Second limiting frame; 54. Slide plate; 55. Through opening; 56. Movable rod; 57. Fixed block; 58. Card slot; 59. Card block; 510. Avoidance opening; 511. Sunk groove; 61. Fixed frame; 62. Outer cylinder; 63. Ejector rod; 64. Boosting spring; 65. Connecting block; 71. Cooling cylinder; 72. Discharge port; 73. Heat preservation curtain; 74. Outer layer pipe; 75. Inner layer pipe; 76. Jet pipe; 77. Jet orifice; 81. Wheel frame; 82. Wheel axle; 83. Roller; 84. Adjusting screw; 85. Guide rod; 91. Installation cylinder; 92. Rotating block; 93. Moving block; 94. Limiting groove; 95. Limiting block; 96. Elastic expansion bladder; 97. Installation pipe; 98. Check valve; 101. Cooling seat; 102. Semiconductor refrigeration chip. Specific embodiments

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0047] Refer to Figures 1 - 15 , a stainless steel mold for aluminum profile extrusion molding, including an upper die 1, a lower die 2, a buffer unit and a cooling unit. A shunt hole 11 is opened on the upper die 1, a welding chamber 22 is opened at one end of the lower die 2, and a die outlet 23 is opened at the other end. A number of sunk grooves 511 are opened on the side surface of the upper die 1;

[0048] The buffer unit is arranged on the upper die 1. The buffer unit is composed of a buffer assembly, a fixed frame 52, a number of sliding assemblies and a number of pushing assemblies. The buffer assembly includes a buffer plate 42 and a number of blocking structures. The number of blocking structures is circumferentially and arrayedly distributed on the buffer plate 42. The fixed frame 52 is fixed on the upper die 1 through a number of fixed rods 51. A number of avoidance openings 510 are opened on the fixed frame 52. The number of avoidance openings 510 are respectively arranged opposite to a number of sunk grooves 511. The number of sliding assemblies is circumferentially and arrayedly distributed on the inner ring of the fixed frame 52. The number of blocking structures are respectively arranged opposite to a number of sliding structures. The number of pushing assemblies are respectively arranged on a number of sliding assemblies;

[0049] The buffer assembly further includes a buffer box 31 and an annular sliding plate 32. The buffer box 31 is fixed on the outer peripheral surface of the upper die 1. The buffer box 31 is of an annular structure and stores hydraulic oil inside. A plurality of holes are provided on the side surface of the buffer box 31. The annular sliding plate 32 is slidably arranged inside the buffer box 31. The annular sliding plate 32 is immersed in the hydraulic oil. A plurality of through holes 33 are provided on the annular sliding plate 32. The annular sliding plate 32 and the inner surface of the buffer box 31 are connected by a buffer spring 34. The annular sliding plate 32 and the annular plate 36 are connected by a plurality of connecting rods 35. The plurality of connecting rods 35 respectively pass through the plurality of holes, and the connecting rods 35 are hermetically and slidably connected in the holes. The blocking structure includes a first limiting frame 41, a buffer plate 42 and a tension spring 46. The first limiting frame 41 is fixed on the side surface of the annular plate 36. The buffer plate 42 is slidably assembled on the first limiting frame 41. An installation opening 43 is provided at one end of the buffer plate 42 away from the tension spring 46. An installation seat 44 is fixed in the installation opening 43. A rollable ball 45 is arranged on the installation seat 44. The design of the ball 45 can reduce the friction force generated between the aluminum rod and the buffer plate 42. When the buffer plate 42 moves towards a position away from the center of the annular plate 36, the ball 45 will roll under the action of the friction force. This design ensures that the buffer plate 42 can still be smoothly separated from the aluminum rod under the pushing action of the aluminum rod. One end of the tension spring 46 is connected to the first limiting frame 41, and the other end is connected to the end position of the buffer plate 42. The tension spring 46 is used for the automatic reset of the buffer plate 42;

[0050] When the stainless steel mold for extruding aluminum profiles proposed by the present invention is in use, in the initial state, the annular plate 36 is located away from the upper die 1, and several buffer plates 42 are all located near the center of the annular plate 36. When extruding and forming the aluminum rod, the aluminum rod feeds toward the upper die 1 under the action of the feeding module. Before the aluminum rod contacts the upper die 1, the aluminum rod will first contact several balls 45 on several buffer plates 42, and push several buffer plates 42 to move through several balls 45. When several buffer plates 42 move, they can drive the annular plate 36 to move, so that the annular plate 36 moves toward the direction close to the buffer box 31. When the annular plate 36 moves, it can drive the annular sliding plate 32 to move through several connecting rods 35, so that the annular sliding plate 32 moves inside the buffer box 31. When the annular sliding plate 32 moves, it will squeeze the buffer spring 34. In this process, the buffer spring 34 will provide a buffering effect on the movement of the annular sliding plate 32, and this buffering effect is transmitted to the aluminum rod through several connecting rods 35, the annular plate 36 and several buffer plates 42. The purpose is to reduce the impact force generated when the aluminum rod contacts the upper die 1 and protect the upper die 1. In addition, the buffer box 31 stores oil, the annular sliding plate 32 is immersed in the oil, and several through holes 33 are formed on the annular sliding plate 32. When the annular sliding plate 32 moves, the oil will pass through several through holes 33. This design can provide a damping effect on the movement of the annular sliding plate 32, thereby further improving the buffering effect of the buffer unit on the aluminum rod. Through the design of the buffer unit, before the aluminum rod contacts the upper die 1, through the chain reaction of several buffer plates 42, the annular plate 36, the connecting rods 35 and the annular sliding plate 32, the impact force is effectively absorbed. This buffering process significantly reduces the force generated when the aluminum rod directly collides with the upper die 1, plays an important role in protecting the upper die 1, and prolongs the service life of the mold;

[0051] The sliding structure includes a second limiting frame 53, a sliding plate 54, a through hole 55, a movable rod 56, a fixing block 57 and a clamping block 59. The second limiting frame 53 is fixed on the inner ring of the fixing frame 52. The sliding plate 54 is slidably assembled on the second limiting frame 53. Limiting ridges are fixed at both ends of the sliding plate 54, and the two limiting ridges provide limitation for the sliding plate 54 to prevent the sliding plate 54 from falling off the second limiting frame 53. The through hole 55 is formed in the sliding plate 54. The movable rod 56 is slidably arranged in the through hole 55. The fixing block 57 is fixed at one end of the movable rod 56 away from the sliding plate 54, and a clamping groove 58 is formed in the side surface of the fixing block 57. The clamping block 59 is fixed at one end of the buffer plate 42 close to the fixing frame 52. The clamping block 59 is arranged opposite to the clamping groove 58, and the cross sections of the clamping block 59 and the clamping groove 58 are both of T-shaped structures. The pushing assembly includes a fixing frame 61, an outer cylinder 62, a top rod 63 and a connecting block 65. The fixing frame 61 is fixed on the side surface of the sliding plate 54, and the fixing frame 61 is of an L-shaped structure. The outer cylinder 62 is fixed at one end of the fixing frame 61 away from the sliding plate 54. One end of the outer cylinder 62 is open. The top rod 63 is movably inserted into the outer cylinder 62. The top rod 63 and the outer cylinder 62 are connected by a boosting spring 64. The connecting block 65 is fixed on the movable rod 56. One end of the top rod 63 extends to the outside of the outer cylinder 62 and is fixedly connected to the connecting block 65;

[0052] When the buffer plate 42 moves into the facing sinking groove 511, the end position of the aluminum rod will contact the upper die 1. To prevent the buffer plate 42 from obstructing the aluminum rod from being pressed into several shunt holes 11 in the upper die 1, the present invention designs an automatic displacement mechanism for the buffer plate 42. Specifically, when the buffer plate 42 moves, the clamping block 59 thereon moves accordingly. During the process of the buffer plate 42 moving following the feeding aluminum rod, the clamping block 59 will move into the card slot 58 and drive the fixed block 57 to move. When the fixed block 57 moves, it will drive the movable rod 56 to move. In the initial state, the through hole 55 on the sliding plate 54 and the avoidance hole 510 on the fixed frame 52 are in a staggered state. At this time, one end of the movable rod 56 extends into the through hole 55 and abuts against the fixed frame 52. Therefore, when the movable rod 56 moves, it can drive the sliding plate 54 to move. When the buffer plate 42 moves into the facing sinking groove 511, the through hole 55 on the sliding plate 54 and the avoidance hole 510 on the fixed frame 52 happen to be aligned with each other. At this time, the movable rod 56 can slide into the avoidance hole 510. In this case, the pushing assembly plays a role. The pressurizing spring 64 in the pushing assembly makes the ejector rod 63 always have a tendency to push the connecting block 65. Under the combined action of the pressurizing spring 64 and the ejector rod 63, the movable rod 56 is always in a state of pressing tightly against the fixed frame 52. When the through hole 55 on the sliding plate 54 and the avoidance hole 510 on the fixed frame 52 are aligned, the ejector rod 63 can push the movable rod 56 to move through the connecting block 65, so that the movable rod 56 is inserted into the avoidance hole 510. When the movable rod 56 moves, it can drive the buffer plate 42 to move through the fixed block 57 and the clamping block 59, so that the buffer plate 42 and the aluminum rod are separated from each other. Based on the above process, under the combined action of the sliding assembly and the pushing assembly, when the buffer plate 42 moves into the facing sinking groove 511, several buffer plates 42 can synchronously move in the direction away from the center position of the annular plate 36 and separate from the aluminum rod. This design can prevent the buffer plate 42 from obstructing the continuous feeding of the aluminum rod and ensure the smooth feeding of the aluminum rod. It is worth noting that the buffering effect provided by several buffer plates 42 to the aluminum rod lasts until the aluminum rod contacts the upper die 1, so as to ensure the buffering effect of the buffer unit on the aluminum rod;

[0053] The cooling unit is composed of a cooling cylinder 71, a cooling assembly, a driving assembly, two pumping assemblies and a temperature reduction assembly. One end of the cooling cylinder 71 is open, and the other end is closed. The open end of the cooling cylinder 71 is fixed on the side of the lower die 2. The closed end of the cooling cylinder 71 is provided with a discharge port 72. The inner top surface of the discharge port 72 is fixed with a heat preservation curtain 73. The cooling assembly, the driving assembly, two pumping assemblies and the temperature reduction assembly are all arranged on the cooling cylinder 71. One of the pumping assemblies is used for pumping liquid, and the other pumping assembly is used for pumping gas;

[0054] The stainless steel mold for extruding aluminum profiles proposed by the present invention also has the function of cooling and curing the extruded aluminum profiles. Through the design of the cooling unit, the extruded aluminum profiles can be quickly cured and shaped. Specifically, after the aluminum profiles are extruded through the die outlet 23, they will move into the interior of the cooling cylinder 71 and finally move out through the discharge outlet 72 on the cooling cylinder 71. Before processing, the staff can adjust the position of the wheel frame 81 according to the size of the aluminum profiles so that the extruded aluminum profiles just come into contact with the rollers 83. The adjustment of the wheel frame 81 is achieved by rotating the adjustment screw 84, which will not be elaborated here. After adjusting the positions of the wheel frame 81 and the rollers 83, the moving aluminum profiles will drive the rollers 83 to rotate under the action of friction. When the rollers 83 rotate, they drive the wheel shafts 82 to rotate. When the wheel shafts 82 rotate, they will drive the two pumping components to operate. Further, anti-slip patterns can be set on the surface of the rollers 83 to increase the friction between them and the aluminum profiles, so as to facilitate the aluminum profiles to drive the rollers 83 to rotate;

[0055] The cooling component includes an outer layer pipe 74, an inner layer pipe 75 and a jet pipe 76. The outer layer pipe 74 is fixed inside the cooling cylinder 71, and the inner layer pipe 75 is fixed inside the outer layer pipe 74. A liquid flow area is formed between the outer layer pipe 74 and the inner layer pipe 75. One end of the inner layer pipe 75 extends to the outside of the outer layer pipe 74. The jet pipe 76 is fixed inside the cooling cylinder 71 and is arranged facing the discharge outlet 72. A number of jet openings 77 are provided on the jet pipe 76. One end of the inner layer pipe 75 located outside the outer layer pipe 74 is connected to the jet pipe 76 through a hose. The liquid flow area, the pumping component for pumping liquid and the cooling component together form a liquid flow path, and the inner layer pipe 75, the pumping component for pumping gas and the jet pipe 76 together form a gas flow path;

[0056] The driving assembly includes a wheel frame 81, a wheel axle 82, a roller 83, an adjusting screw 84 and two guide rods 85. The wheel frame 81 is arranged inside the cooling cylinder 71. The wheel axle 82 is rotatably assembled on the wheel frame 81. The roller 83 is fixedly sleeved on the wheel axle 82. The adjusting screw 84 passes through the cooling cylinder 71 and is threadedly connected to the cooling cylinder 71. One end of the adjusting screw 84 located inside the cooling cylinder 71 is rotatably installed on the wheel frame 81. Both of the two guide rods 85 pass through the cooling cylinder 71 and are slidably connected to the cooling cylinder 71. One end of each of the two guide rods 85 located inside the cooling cylinder 71 is fixed on the wheel frame 81. A hexagonal nut is fixed to the end of the adjusting screw 84 located outside the cooling cylinder 71. The pumping assembly includes an installation cylinder 91, a rotating block 92, a moving block 93 and an elastic expansion bladder 96. The installation cylinder 91 is fixed to the wheel frame 81 through a bracket. The rotating block 92 and the moving block 93 are both arranged inside the installation cylinder 91. The rotating block 92 and the moving block 93 together form a cylindrical structure. The rotating block 92 and the moving block 93 are of the same size. Bevels are provided at the opposite ends of the rotating block 92 and the moving block 93. The rotating block 92 is rotatably assembled inside the installation cylinder 91. The moving block 93 is slidably assembled inside the installation cylinder 91. The rotating block 92 is fixedly connected to the end of the wheel axle 82. A limiting block 95 is fixed to the moving block 93. A limiting groove 94 is formed on the outer peripheral surface of the installation cylinder 91. The limiting block 95 is slidably arranged in the limiting groove 94. One end of the elastic expansion bladder 96 is connected to the inner surface of the installation cylinder 91, and the other end is connected to the moving block 93. Two installation pipes 97 are connected to the elastic expansion bladder 96. One-way valves 98 are installed on both of the two installation pipes 97. The current-limiting directions of the two one-way valves 98 are opposite;

[0057] For two pumping components, one is used to pump liquid and the other is used to pump gas. When the two pumping components operate under the action of the axle 82, the cooling unit plays a role in cooling the aluminum profile. First, the pipeline connection method in the cooling unit is introduced. For the pumping component that pumps liquid, one end of an installation pipe 97 away from the elastic expansion bladder 96 is connected to the cooling seat 101, and the other end of the installation pipe 97 away from the elastic expansion bladder 96 is connected to the liquid circulation area between the outer layer pipe 74 and the inner layer pipe 75. This liquid circulation area is also connected to the cooling seat 101 through a return pipe. For the pumping component that pumps gas, one end of an installation pipe 97 away from the elastic expansion bladder 96 is connected to the internal space of the cooling cylinder 71, and the other end of the installation pipe 97 away from the elastic expansion bladder 96 is connected to one end of the inner layer pipe 75. The working principle of the pumping component is that when the axle 82 rotates, it drives the rotating block 92 to rotate. The rotating block 92 and the moving block 93 together form a cylindrical structure. The rotating block 92 and the moving block 93 are of the same size, and inclined surfaces are provided at the opposite ends of the rotating block 92 and the moving block 93. During the rotation of the rotating block 92, the inclined surface of the rotating block 92 continuously presses against the inclined surface of the moving block 93. The moving block 93 is connected to the installation cylinder 91 through a limiting groove 94 and a limiting block 95, which enables the moving block 93 to only move linearly inside the installation cylinder 91. Therefore, with the rotation of the rotating block 92 and the self-elastic force of the elastic expansion bladder 96, the moving block 93 will move back and forth inside the installation cylinder 91, which causes the elastic expansion bladder 96 to continuously perform squeezing and restoring actions. Two installation pipes 97 are connected to the elastic expansion bladder 96, and one-way valves 98 are installed on both installation pipes 97, and the flow-limiting directions of the two one-way valves 98 are opposite. Specifically, one one-way valve 98 restricts the gas or liquid to only enter the elastic expansion bladder 96, and the other one-way valve 98 restricts the gas or liquid to only flow out of the elastic expansion bladder 96. When the elastic expansion bladder 96 is squeezed, the gas or liquid inside the elastic expansion bladder 96 will be pressed out. When the elastic expansion bladder 96 restores, the elastic expansion bladder 96 will perform an air intake or liquid intake action again. Based on the above process, for the pumping component that pumps liquid, during its operation, it can continuously extract the refrigerant in the cooling seat 101 and pump the refrigerant into the liquid circulation area between the outer layer pipe 74 and the inner layer pipe 75, so that the refrigerant flows in the liquid circulation area. The refrigerant finally returns to the cooling seat 101 through the return pipe, realizing the circulating flow of the refrigerant. For the pumping component that pumps gas, during its operation, it can continuously extract the air in the cooling cylinder 71 and pump the gas into the inner layer pipe 75. The gas will finally enter the jet pipe 76 through a hose and be ejected through a number of jet ports 77;

[0058] During the process of refrigerant circulation, the internal environment of the cooling cylinder 71 can be cooled by liquid through the outer tube 74, thereby cooling the aluminum profile moving inside the cooling cylinder 71. At the same time, the circulating refrigerant can also cool the gas flowing inside the inner tube 75 through the inner tube 75. The cooled gas is finally sprayed back into the cooling cylinder 71 through a plurality of jet ports 77 to achieve air cooling of the internal environment of the cooling cylinder 71. The combination of liquid cooling and air cooling can effectively maintain the low-temperature environment inside the cooling cylinder 71, thereby ensuring the cooling and solidification effect of the aluminum profile. It should be noted that a heat preservation curtain 73 is provided in the discharge port 72. The heat preservation curtain 73 is composed of a plurality of curtain belts made of flexible materials. When the aluminum profile passes through the discharge port 72, it will push the corresponding curtain belt, while the remaining curtain belts are still in the state of blocking the discharge port 72. Through the design of the heat preservation curtain 73, the dissipation of cold air inside the cooling cylinder 71 can be greatly reduced. In addition, the jet pipe 76 is arranged opposite to the discharge port 72, and the jet direction of the jet port 77 is from the discharge port 72 to the inside of the cooling cylinder 71. This design can also prevent cold air from escaping through the discharge port 72, which is beneficial to maintaining the low-temperature environment inside the cooling cylinder 71. It is worth mentioning that the operation of the two pumping components is powered by the movement of the aluminum profile, without an external liquid pump, which reduces the operation cost of the device;

[0059] The cooling component includes a cooling seat 101 and a semiconductor refrigeration sheet 102. The cooling seat 101 is fixed on the outer peripheral surface of the cooling cylinder 71. The inside of the cooling seat 101 is hollow. An assembly port is opened on the top surface of the cooling seat 101, and the assembly port is communicated with the inside of the cooling seat 101. The semiconductor refrigeration sheet 102 is installed in the assembly port. The refrigerating surface of the semiconductor refrigeration sheet 102 extends into the inside of the cooling seat 101, and the heat conducting surface of the semiconductor refrigeration sheet 102 faces the outside of the cooling seat 101. Heat dissipation fins are fixed on the heat conducting surface of the semiconductor refrigeration sheet 102. For the cooling seat 101, the semiconductor refrigeration sheet 102 is provided on it. When the refrigerant flows through the cooling seat 101, the semiconductor refrigeration sheet 102 cools and reduces the temperature of the refrigerant, so that the circulating refrigerant always has a low enough temperature. The heat conducting surface of the semiconductor refrigeration sheet 102 extends to the outside of the cooling seat 101 for heat dissipation. In addition, heat dissipation fins are also provided on the heat conducting surface of the semiconductor refrigeration sheet 102, and the design of the heat dissipation fins is more conducive to the rapid dissipation of heat from the heat conducting surface of the semiconductor refrigeration sheet 102.

[0060] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A stainless steel mold for aluminum profile extrusion molding, characterized in that: It comprises an upper mold (1), a lower mold (2), a buffer unit and a cooling unit; The upper die (1) is provided with a flow diversion hole (11), one end of the lower die (2) is provided with a welding chamber (22), the other end is provided with a die outlet (23), and the side surface of the upper die (1) is provided with a plurality of sink grooves (511); The buffer unit is arranged on the upper mold (1), and the buffer unit is composed of a buffer component, a fixed frame (52), a plurality of sliding components and a plurality of pushing components. The buffer component includes a buffer plate (42) and a plurality of blocking structures. The plurality of blocking structures are distributed on the buffer plate (42) in a circumferential array. The fixed frame (52) is fixed to the upper mold (1) by a plurality of fixing rods (51). The fixed frame (52) is provided with a plurality of avoidance openings (510), and the plurality of avoidance openings (510) are respectively arranged opposite to the plurality of sink grooves (511). The plurality of sliding components are distributed on the inner circle of the fixed frame (52) in a circumferential array. The plurality of blocking structures are respectively arranged opposite to the plurality of sliding structures. The plurality of pushing components are respectively arranged on the plurality of sliding components. The cooling unit is composed of a cooling cylinder (71), a cooling component, a driving component, two pumping components and a cooling component. One end of the cooling cylinder (71) is open and the other end is closed. The open end of the cooling cylinder (71) is fixed to the side of the lower mold (2). The closed end of the cooling cylinder (71) is provided with a discharge port (72). A thermal insulation curtain (73) is fixed to the inner top surface of the discharge port (72). The cooling component, the driving component, the two pumping components and the cooling component are all arranged on the cooling cylinder (71). One of the pumping components is used to pump liquid, and the other pumping component is used to pump gas.

2. A stainless steel die for aluminum profile extrusion molding according to claim 1, characterized in that: The buffer assembly also includes a buffer box (31) and an annular slide plate (32). The buffer box (31) is fixed on the outer peripheral surface of the upper mold (1). The buffer box (31) is annular in structure and has oil stored inside. The side of the buffer box (31) is provided with a plurality of holes. The annular slide plate (32) is slidably arranged inside the buffer box (31). The annular slide plate (32) is immersed in the oil. The annular slide plate (32) is provided with a plurality of through holes (33). The annular slide plate (32) is connected to the inner surface of the buffer box (31) through a buffer spring (34). The annular slide plate (32) is connected to the annular plate (36) through a plurality of connecting rods (35). The plurality of connecting rods (35) pass through the plurality of holes respectively, and the connecting rods (35) are sealingly and slidably connected in the holes.

3. A stainless steel die for aluminum profile extrusion molding according to claim 2, characterized in that: The blocking structure comprises a first limiting frame (41), a buffer plate (42) and a tension spring (46); the first limiting frame (41) is fixed to the side of the annular plate (36); the buffer plate (42) is slidably assembled on the first limiting frame (41); one end of the tension spring (46) is connected to the first limiting frame (41), and the other end is connected to the end position of the buffer plate (42).

4. A stainless steel die for aluminum profile extrusion molding according to claim 3, characterized in that: An installation opening (43) is provided at one end of the buffer plate (42) away from the tension spring (46), a mounting seat (44) is fixed in the installation opening (43), and a rollable ball (45) is provided on the installation seat (44).

5. The stainless steel die for aluminum profile extrusion molding according to claim 3, characterized in that: The sliding structure comprises a second limiting frame (53), a sliding plate (54), a through-hole (55), a movable rod (56), a fixed block (57) and a clamping block (59); the second limiting frame (53) is fixed on the inner ring of the fixed frame (52); the sliding plate (54) is slidably assembled on the second limiting frame (53); both ends of the sliding plate (54) are fixed with limiting convex strips; the through-hole (55) is provided on the sliding plate (54); the movable rod (56) is slidably arranged in the through-hole (55); the fixed block (57) is fixed to an end of the movable rod (56) away from the sliding plate (54); a clamping groove (58) is provided on a side surface of the fixed block (57); the clamping block (59) is fixed to an end of the buffer plate (42) close to the fixed frame (52); the clamping block (59) is arranged opposite to the clamping groove (58); and the cross sections of the clamping block (59) and the clamping groove (58) are both T-shaped structures.

6. A stainless steel die for aluminum profile extrusion molding according to claim 5, characterized in that: The pushing assembly comprises a fixed frame (61), an outer cylinder (62), a push rod (63) and a connecting block (65); the fixed frame (61) is fixed to the side of the sliding plate (54), and the fixed frame (61) is in an L-shaped structure; the outer cylinder (62) is fixed to one end of the fixed frame (61) away from the sliding plate (54); one end of the outer cylinder (62) is open; the push rod (63) is movably inserted into the outer cylinder (62); the push rod (63) and the outer cylinder (62) are connected via a booster spring (64); the connecting block (65) is fixed to the movable rod (56); one end of the push rod (63) extends to the outside of the outer cylinder (62) and is fixedly connected to the connecting block (65).

7. The stainless steel die for aluminum profile extrusion molding according to claim 1, characterized in that: The cooling component comprises an outer tube (74), an inner tube (75) and an injection tube (76); the outer tube (74) is fixed inside the cooling tube (71); the inner tube (75) is fixed inside the outer tube (74); a liquid flow area is formed between the outer tube (74) and the inner tube (75); one end of the inner tube (75) extends to the outside of the outer tube (74); the injection tube (76) is fixed inside the cooling tube (71); and the injection tube (76) is arranged opposite to the discharge port (72); a plurality of injection ports (77) are provided on the injection tube (76); one end of the inner tube (75) located outside the outer tube (74) is connected to the injection tube (76) through a hose; the liquid flow area, the pumping component for pumping liquid and the cooling component together form a liquid flow passage; the inner tube (75), the pumping component for pumping gas and the injection tube (76) together form a gas flow passage.

8. The stainless steel die for aluminum profile extrusion molding according to claim 1, characterized in that: The driving assembly comprises a wheel frame (81), a wheel axle (82), a roller (83), an adjusting screw (84) and two guide rods (85); the wheel frame (81) is arranged inside the cooling cylinder (71); the wheel axle (82) is rotatably mounted on the wheel frame (81); the roller (83) is fixedly sleeved on the wheel axle (82); the adjusting screw (84) passes through the cooling cylinder (71) and is threadedly connected to the cooling cylinder (71); one end of the adjusting screw (84) located inside the cooling cylinder (71) is rotatably mounted on the wheel frame (81); the two guide rods (85) both pass through the cooling cylinder (71) and are slidably connected to the cooling cylinder (71); one end of the two guide rods (85) located inside the cooling cylinder (71) is fixed on the wheel frame (81); and one end of the adjusting screw (84) located outside the cooling cylinder (71) is fixed with a hexagonal nut.

9. The stainless steel die for aluminum profile extrusion molding according to claim 8, characterized in that: The pumping assembly comprises a mounting cylinder (91), a rotating block (92), a moving block (93) and an elastic telescopic bag (96); the mounting cylinder (91) is fixed to the wheel frame (81) through a bracket; the rotating block (92) and the moving block (93) are both arranged inside the mounting cylinder (91); the rotating block (92) is rotatably assembled in the mounting cylinder (91); the moving block (93) is slidably assembled in the mounting cylinder (91); the rotating block (92) is fixedly connected to the end position of the wheel shaft (82); the moving block (93) is rotatably assembled in the mounting cylinder (91); A limiting block (95) is fixed on the mounting tube (93), a limiting groove (94) is provided on the outer peripheral surface of the mounting tube (91), the limiting block (95) is slidably arranged in the limiting groove (94), one end of the elastic telescopic bag (96) is connected to the inner surface of the mounting tube (91), and the other end is connected to the moving block (93), the elastic telescopic bag (96) is connected to two mounting tubes (97), and both mounting tubes (97) are installed with a one-way valve (98), and the limiting directions of the two one-way valves (98) are opposite; The rotating block (92) and the moving block (93) together form a cylindrical structure. The rotating block (92) and the moving block (93) are of the same size. The opposite ends of the rotating block (92) and the moving block (93) are both provided with inclined surfaces.

10. A stainless steel die for aluminum profile extrusion molding according to claim 9, characterized in that: The cooling component comprises a cooling seat (101) and a semiconductor cooling sheet (102); the cooling seat (101) is fixed on the outer peripheral surface of the cooling tube (71); the interior of the cooling seat (101) is hollow; an assembly opening is provided on the top surface of the cooling seat (101); the assembly opening is communicated with the interior of the cooling seat (101); the semiconductor cooling sheet (102) is installed in the assembly opening; the cooling surface of the semiconductor cooling sheet (102) extends to the interior of the cooling seat (101); the heat conducting surface of the semiconductor cooling sheet (102) faces the outside of the cooling seat (101); and heat dissipation fins are fixed on the heat conducting surface of the semiconductor cooling sheet (102).

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