Magnesium particle preheating feeding hopper for magnesium alloy semi-solid forming machine

Abstract

The utility model relates to a magnesium particle preheating charging hopper for a magnesium alloy semi-solid forming machine, which comprises a shell (1), the shell (1) is funnel-shaped, a top cover (11) is arranged at the top opening of the shell (1), an interlayer (12) is arranged on the side wall of the shell (1), and the bottom opening of the shell (1) is used for being communicated with a charging barrel of the magnesium alloy semi-solid forming machine. One end of the top cover (11) is hinged to one side of the top of the shell (1), the other end of the top cover (11) is connected with the shell (1) in a clamped mode through a buckle (2), an exhaust port (111) is formed in the top cover (11), and a heating piece is arranged in the interlayer (12). The magnesium particle moisture removal device can remove moisture of magnesium particles added into the magnesium alloy semi-solid forming machine.

Description

Technical Field

[0001] The utility model relates to the technical field of die-casting equipment, in particular to a magnesium particle preheating charging hopper for a magnesium alloy semi-solid forming machine. Background Art

[0002] As the lightest engineering metal material, magnesium alloy also has the advantages of high specific strength, specific rigidity, electromagnetic shielding performance, vibration absorption characteristics and thermal conductivity. It is widely used in aerospace, automobile, 3C electronics and other fields. At present, the molding process of magnesium alloy structural parts is mainly based on die casting and semi-solid molding.

[0003] The die-casting process has the advantages of high productivity, precise dimensional control and the ability to form workpieces with complex shapes. However, the molten metal is prone to air entrapment and turbulence when filling the cavity, which makes the casting prone to pores, resulting in reduced mechanical strength and inability to heat treat. Therefore, it is impossible to form parts that are too thin, and there is a certain degree of danger in the die-casting process.

[0004] The semi-solid forming process is to transport magnesium particles (particle size 2~5mm) from a hopper to a barrel 51 of a magnesium alloy semi-solid forming machine 5, and transport the magnesium particles through a feed screw 512 in the barrel 51. Under the heating effect of the barrel 51 and the shearing effect of the feed screw 512, the magnesium particles in the barrel 51 are converted into a semi-solid slurry, and are injected into the mold cavity at a high speed through a nozzle 513 at the front end of the barrel 51, and then injected into the mold cavity, and after cooling, solidification and demolding, a product is formed (refer to Figure 6 ). During the injection molding process, the pressure is relatively high (80~100MPa). The high pressure can effectively promote the heat transfer between the preheated mold and the magnesium alloy, promote the refinement of the product surface grains, and thus improve the corrosion resistance and mechanical strength of the product.

[0005] However, since magnesium particles may carry moisture when entering the barrel and generate gas in the barrel after being heated in the barrel, there is a risk of magnesium spraying, and the magnesium alloy product may contain pores and reduce performance.

[0006] The utility model aims to solve the problem that when semi-solid forming and casting magnesium alloy, moisture entrained in the material causes pores in the product and there is a risk of magnesium spraying. Utility Model Content

[0007] In order to solve the above problems, the utility model provides a magnesium particle preheating hopper for a magnesium alloy semi-solid forming machine, comprising a shell 1, the shell 1 is funnel-shaped, a top cover 11 is arranged at the top opening of the shell 1, an interlayer 12 is arranged on the side wall of the shell 1, and the bottom opening of the shell 1 is used to communicate with the barrel 51 of the magnesium alloy semi-solid forming machine 5. One end of the top cover 11 is hinged to one side of the top of the shell 1, and the other end is snap-connected to the shell 1 through a buckle 2, an exhaust port 111 is arranged on the top cover 11, and a heating element is arranged in the interlayer 12.

[0008] When the utility model is used, the shell 1 is fixedly connected to the barrel 51 of the magnesium alloy semi-solid forming machine 5, so that the bottom opening of the shell 1 is connected to the feed port of the barrel 51, and the magnesium particle material is added into the shell 1, and the top cover 11 is covered, and the top cover 11 is fixed by the buckle 2, and then the magnesium particles in the shell 1 are heated by the heating element, so that the water entrained in the magnesium particles evaporates to form water vapor, and the water vapor is discharged from the exhaust port 111 on the top cover 11, so that the magnesium particle material is kept dry, and then the magnesium alloy semi-solid forming machine 5 can be opened to produce magnesium alloy castings.

[0009] The utility model sets a top cover 11 at the top opening of the shell 1, which can prevent foreign impurities from entering the shell 1 and mixing into the magnesium particles to affect the performance of the magnesium alloy product; by setting an interlayer 12 on the side wall of the shell 1 and setting a heating element in the interlayer 12, the moisture on the magnesium particles can be evaporated to form water vapor and discharged from the exhaust port 111 on the top cover 11, so that the magnesium particles are kept dry, and the risk of magnesium spraying caused by the generation of gas in the barrel 51 after the moisture entrained in the magnesium particles is heated in the barrel 51, thereby preventing the magnesium alloy product from containing pores and reducing the performance.

[0010] Preferably, it further comprises an air guide cylinder 3 which is vertically arranged in the shell 1 , the upper and lower ends of the air guide cylinder 3 are closed, a plurality of air guide holes 31 are evenly arranged on the air guide cylinder 3 , and the diameter of the air guide holes 31 is smaller than the diameter of the magnesium particles.

[0011] By arranging the air guide cylinder 3 in the shell 1, the water vapor generated by the moisture in the magnesium particle material at the bottom of the shell 1 after being heated can be quickly raised to the upper part of the shell 1, which is convenient for the water vapor to be discharged and prevents the water vapor from accumulating in the magnesium particle material and being unable to be discharged.

[0012] Preferably, a thermometer 14 and a hygrometer 16 are provided in the housing 1. The thermometer 14 is provided in the housing 1 to detect the temperature in the housing 1, and the hygrometer 16 is provided to detect the humidity in the housing 1, so as to control the heating and drying of the magnesium particle material in the housing 1 according to the humidity condition.

[0013] Preferably, a heat-insulating layer is provided on the outer wall of the housing 1. Providing a heat-insulating layer on the outer wall of the housing 1 can reduce heat dissipation, thereby saving heating energy.

[0014] Preferably, the buckle 2 includes a clamping block 21 and a clamping ring 22, and the clamping block 21 is fixedly arranged on the top cover 11. One end of the clamping ring 22 is rotatably arranged on the side wall of the housing 1, and the other end is clamped on the clamping block 21 to fix the top cover 11. Fixing the top cover 11 by the two buckles can prevent the top cover 11 from being opened by external force, resulting in external impurities being mixed into the magnesium particles.

[0015] Preferably, an exhaust valve 4 is further included, and the exhaust valve 4 includes a valve body 41, a spring 42 and a piston 43. The valve body 41 is fixedly arranged on the exhaust port 111, and a cylindrical exhaust chamber 411 is formed inside. An exhaust inlet 412 communicating with the exhaust port 111 is arranged at the bottom of the valve body 41, and an exhaust outlet 413 is arranged on the side wall of the valve body 41. The piston 43 matches the exhaust chamber 411 and is slidably arranged in the exhaust chamber 411. The spring 42 is arranged in the exhaust chamber 411, located above the piston 43, and the bottom is fixedly connected to the top of the piston 43.

[0016] By arranging the exhaust valve 4 on the exhaust port 111, an exhaust chamber 411 is formed inside the valve body 41, an exhaust inlet 412 connected with the exhaust port 111 is arranged at the bottom of the valve body 41, and an exhaust outlet 413 is arranged on the side wall of the valve body 41, and the piston 43 is slidably arranged in the exhaust chamber 411. When there is water vapor in the shell 1, the water vapor enters the exhaust chamber 411 through the exhaust port 111, overcomes the elastic force of the spring 42, and pushes the piston 43 to slide upward along the exhaust chamber 411, so that the exhaust outlet 413 is connected with the exhaust inlet 412, so that the water vapor in the shell 1 is discharged, and the external water vapor can be prevented from entering the shell 1.

[0017] Preferably, the exhaust valve 4 further includes an adjusting member 44, which includes an adjusting screw 441 and an adjusting plate 442. A threaded hole matching the adjusting screw 441 is provided on the top surface of the valve body 41. A handle 443 is provided at the upper end of the adjusting screw 441, and the lower end thereof extends into the valve body 41 through the threaded hole. The adjusting plate 442 is provided in the valve body 41 and is rotatably connected to the lower end of the adjusting screw 441. The top of the spring 42 is fixedly connected to the adjusting plate 442.

[0018] By setting an adjustment member 44 on the exhaust valve 4, the height of the adjustment plate 442 in the exhaust chamber 411 can be adjusted by rotating the adjustment screw 441, so that the extension and contraction state of the spring 42 can be adjusted as needed, and the position of the piston 43 can be adjusted, so that the discharge of water vapor in the shell 1 can be regulated according to actual needs.

[0019] Preferably, the heating element is an electric heating plate 13 . BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 . Schematic diagram of the overall structure of the magnesium particle preheating hopper for the magnesium alloy semi-solid forming machine;

[0021] Figure 2 .Schematic diagram of the internal structure of the shell;

[0022] Figure 3 . Schematic diagram of the internal structure of the exhaust valve;

[0023] Figure 4 . Schematic diagram of the internal structure of the exhaust valve in exhaust state;

[0024] Figure 5 . Figure 1 The enlarged schematic diagram at A in the middle;

[0025] Figure 6 .Diagram of usage status.

[0026] In the figure, 1. shell, 11. top cover, 111. exhaust port, 12. interlayer, 13. electric heating plate, 14. thermometer, 15. mounting plate, 151. mounting hole, 16. hygrometer, 2. buckle, 21. block, 22. snap ring, 3. air guide cylinder, 31. air guide hole, 4. exhaust valve, 41. valve body, 411. exhaust cavity, 412. exhaust inlet, 413. exhaust outlet, 42. spring, 43. piston, 44. adjusting part, 441. adjusting screw, 442. adjusting plate, 443. handle, 5. magnesium alloy semi-solid forming machine, 51. barrel, 511. mounting platform, 512. feed screw, 513. nozzle, 52. mold cavity. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] like Figure 1 and Figure 2 As shown, the magnesium particle preheating hopper for the magnesium alloy semi-solid forming machine includes a shell 1, the shell 1 is funnel-shaped, a top cover 11 is provided at the top opening of the shell 1, an interlayer 12 is provided on the side wall of the shell 1, and the bottom opening of the shell 1 is used to communicate with the barrel 51 of the magnesium alloy semi-solid forming machine 5.

[0029] The outer periphery of the bottom of the housing 1 is provided with a mounting plate 15, and a mounting hole 151 is provided on the mounting plate 15. The mounting plate 15 can be fixed on the mounting platform 511 of the magnesium alloy semi-solid forming machine 5 by passing bolts through the mounting holes 151.

[0030] An air guide cylinder 3 is disposed in the shell 1 . The air guide cylinder 3 is disposed vertically. The upper and lower ends of the air guide cylinder 3 are closed. A plurality of air guide holes 31 are evenly disposed on the air guide cylinder 3 . The diameter of the air guide hole 31 is smaller than the diameter of the magnesium particles.

[0031] The air guide tube 3 can make the water vapor generated by heating the water on the magnesium particles at the bottom quickly rise to the upper part of the shell 1, which is convenient for the water vapor to be discharged and prevents the water vapor from accumulating in the magnesium particle material and being unable to be discharged.

[0032] A thermometer 14 and a hygrometer 16 are provided in the housing 1. The thermometer 14 is provided in the housing 1 to detect the temperature in the housing 1, and the hygrometer 16 is provided to detect the humidity in the housing 1, so that the magnesium particle material can be heated and dried according to the humidity control.

[0033] A heat-insulating layer is provided on the outer side wall of the housing 1. The heat-insulating layer can reduce the loss of heat in the housing 1, thereby saving energy for heating.

[0034] One end of the top cover 11 is hinged to one side of the top of the shell 1 , and the other end is snap-fitted to the shell 1 via a snap buckle 2 . An exhaust port 111 is provided on the top cover 11 , and an exhaust valve 4 is provided on the exhaust port 111 .

[0035] The buckle 2 includes a clamp block 21 and a clamp ring 22. The clamp block 21 is fixedly arranged on the top cover 11. One end of the clamp ring 22 is rotatably arranged on the side wall of the housing 1, and the other end is clamped on the clamp block 21 to fix the top cover 11 (refer to Figure 5 ).

[0036] The top cover 11 is fixed by the buckle 2 to prevent the top cover 11 from being opened by external force or accidental touch, and to prevent foreign impurities from entering the housing 1 and mixing into the magnesium particles to affect the performance of the magnesium alloy product.

[0037] A heating element is arranged in the interlayer 12, and the heating element is an electric heating plate 13. The magnesium particle material in the housing 1 can be heated by the electric heating plate 13, so that the water in the magnesium particles is evaporated by heat, and the magnesium particles are kept dry.

[0038] like Figure 3 and Figure 4 As shown, the exhaust valve 4 includes a valve body 41, a spring 42 and a piston 43. The valve body 41 is fixedly arranged on the exhaust port 111, and a cylindrical exhaust cavity 411 is formed inside. An exhaust inlet 412 connected to the exhaust port 111 is arranged at the bottom of the valve body 41, and an exhaust outlet 413 is arranged on the side wall of the valve body 41.

[0039] The piston 43 matches the exhaust chamber 411 and is slidably disposed in the exhaust chamber 411 . The spring 42 is disposed in the exhaust chamber 411 and is located above the piston 43 , and the bottom is fixedly connected to the top of the piston 43 .

[0040] The piston 43 matches the exhaust chamber 411 , where matching means that the shape and size of the cross section of the piston 43 are the same as the shape and size of the cross section of the exhaust chamber 411 , so that the piston 43 can be set in the exhaust chamber 411 and slide up and down in the exhaust chamber 411 .

[0041] An exhaust valve 4 is provided on the exhaust port 111. When the magnesium particle material in the shell 1 is heated to generate water vapor, the water vapor enters the exhaust chamber 411 through the exhaust port 111, overcomes the elastic force of the spring 42, and pushes the piston 43 to slide upward along the exhaust chamber 411, so that the exhaust outlet 413 is connected with the exhaust inlet 412, so that the water vapor in the shell 1 is discharged, and the external water vapor is prevented from entering the shell 1, so that the magnesium particles in the shell 1 are kept dry.

[0042] The exhaust valve 4 further includes an adjusting member 44 , which includes an adjusting screw 441 and an adjusting plate 442 . A threaded hole matching the adjusting screw 441 is provided on the top surface of the valve body 41 .

[0043] The upper end of the adjusting screw 441 is provided with a handle 443, and the lower end thereof extends through the threaded hole into the valve body 41. The adjusting plate 442 is arranged in the valve body 41, and is rotatably connected to the lower end of the adjusting screw 441, and the top of the spring 42 is fixedly connected to the adjusting plate 442.

[0044] A threaded hole matching the adjusting screw 441 is provided on the top surface of the valve body 41, wherein the matching means that the diameter of the threaded hole is equal to or greater than the diameter of the adjusting screw 441, and the pitch and tooth angle of the internal thread of the threaded hole are the same as those of the external thread of the adjusting screw 441, so that the adjusting screw 441 can be inserted into the threaded hole, and the position of the adjusting plate 442 can be adjusted by rotating the adjusting screw 441.

[0045] By setting an adjustment member 44 on the exhaust valve 4, the height of the adjustment plate 442 in the exhaust chamber 411 can be adjusted by rotating the adjustment screw 441, so that the extension and contraction state of the spring 42 can be adjusted as needed, and the position of the piston 43 can be adjusted. The discharge speed of water vapor in the shell 1 can be regulated according to actual conditions such as the humidity in the shell 1.

[0046] like Figure 6 As shown, when the utility model is used, the mounting plate 15 at the bottom of the shell 1 is set on the mounting platform 511 of the barrel 51 of the magnesium alloy semi-solid forming machine 5, and is fixedly connected by bolts so that the bottom opening of the shell 1 is connected to the feed port of the barrel 51, and the magnesium particle material is added into the shell 1, and the top cover 11 is covered, and the top cover 11 is fixed by the buckle 2, and then the magnesium particles in the shell 1 are heated by the heating element to evaporate the water entrained in the magnesium particles to form water vapor, and the water vapor is discharged from the exhaust port 111 on the top cover 11 through the exhaust valve 4 until the humidity in the shell 1 meets the set value, so that the magnesium particle material is kept dry, and then the magnesium alloy semi-solid forming machine 5 can be opened to produce magnesium alloy castings.

[0047] The utility model provides an interlayer 12 on the side wall of the shell 1, and a heating element is provided in the interlayer 12, so that the moisture on the magnesium particles can be evaporated to form water vapor and discharged from the exhaust port 111 on the top cover 11, so that the magnesium particles are kept dry, and the moisture entrained in the magnesium particles is prevented from generating gas in the barrel 51 after being heated in the barrel 51, resulting in the prevention of pores in the magnesium alloy product and the reduction of performance.

[0048] By arranging the air guide cylinder 3 in the shell 1, it is convenient to make the water vapor generated by the water in the magnesium particle material at the bottom of the shell 1 rise quickly to the upper part of the shell 1 after being heated, so as to facilitate the discharge of the water vapor and prevent the water vapor from accumulating in the magnesium particle material and being unable to be discharged. The top cover 11 is fixed by two buckles to prevent the top cover 11 from being opened by external force, causing external impurities to mix into the magnesium particles.

[0049] By arranging the exhaust valve 4 on the exhaust port 111, when there is water vapor in the housing 1, the water vapor enters the exhaust chamber 411 through the exhaust port 111, overcomes the elastic force of the spring 42, pushes the piston 43 to slide upward along the exhaust chamber 411, and makes the exhaust outlet 413 communicate with the exhaust inlet 412, discharges the water vapor in the housing 1, and prevents the external water vapor from entering the housing 1, so that the magnesium particle material is kept dry. By arranging the adjustment member 44 on the exhaust valve 4, the height of the adjustment plate 442 in the exhaust chamber 411 can be adjusted by rotating the adjustment screw 441, so that the expansion and contraction state of the spring 42 can be adjusted as needed, and the position of the piston 43 can be adjusted, and the discharge of water vapor in the housing 1 can be regulated as needed.

[0050] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.

Claims

1. A magnesium particle preheating hopper for a magnesium alloy semi-solid forming machine, characterized in that: comprising a housing (1), The shell (1) is funnel-shaped, a top cover (11) is provided at the top opening of the shell (1), an interlayer (12) is provided on the side wall of the shell (1), and the bottom opening of the shell (1) is used to communicate with the barrel of the magnesium alloy semi-solid forming machine; One end of the top cover (11) is hinged to one side of the top of the shell (1), and the other end is snap-fitted to the shell (1) via a snap buckle (2); an exhaust port (111) is provided on the top cover (11); A heating element is arranged in the interlayer (12).

2. The magnesium particle preheating hopper for a magnesium alloy semi-solid forming machine according to claim 1, characterized in that: It also includes a gas guide cylinder (3), The air guide cylinder (3) is vertically arranged in the housing (1), the upper and lower ends of the air guide cylinder (3) are closed, a plurality of air guide holes (31) are evenly arranged on the air guide cylinder (3), and the diameter of the air guide holes (31) is smaller than the diameter of the magnesium particles.

3. The magnesium particle preheating hopper for a magnesium alloy semi-solid forming machine according to claim 2, characterized in that: A thermometer (14) and a hygrometer (16) are arranged in the housing (1).

4. The magnesium particle preheating hopper for a magnesium alloy semi-solid forming machine according to claim 3, characterized in that: A heat-insulating layer is provided on the outer side wall of the shell (1).

5. The magnesium particle preheating hopper for a magnesium alloy semi-solid forming machine according to claim 4, characterized in that: The buckle (2) comprises a clamping block (21) and a clamping ring (22). The clamping block (21) is fixedly arranged on the top cover (11); One end of the clamping ring (22) is rotatably disposed on the side wall of the housing (1), and the other end is clamped on the clamping block (21) to fix the top cover (11).

6. The magnesium particle preheating hopper for a magnesium alloy semi-solid forming machine according to claim 5, characterized in that: It also includes an exhaust valve (4), The exhaust valve (4) comprises a valve body (41), a spring (42) and a piston (43); The valve body (41) is fixedly arranged on the exhaust port (111), and a cylindrical exhaust cavity (411) is formed inside. An exhaust inlet (412) communicating with the exhaust port (111) is arranged at the bottom of the valve body (41), and an exhaust outlet (413) is arranged on the side wall of the valve body (41); The piston (43) matches the exhaust chamber (411) and is slidably disposed in the exhaust chamber (411); The spring (42) is arranged in the exhaust chamber (411) and is located above the piston (43), with the bottom of the spring being fixedly connected to the top of the piston (43).

7. The magnesium particle preheating hopper for a magnesium alloy semi-solid forming machine according to claim 6, characterized in that: The exhaust valve (4) further comprises a regulating member (44), The adjusting member (44) comprises an adjusting screw (441) and an adjusting plate (442); A threaded hole matching the adjusting screw (441) is provided on the top surface of the valve body (41); The upper end of the adjusting screw (441) is provided with a handle (443), and the lower end thereof passes through a threaded hole and extends into the valve body (41); The adjusting plate (442) is disposed in the valve body (41) and is rotatably connected to the lower end of the adjusting screw (441); The top of the spring (42) is fixedly connected to the adjustment plate (442).

8. The magnesium particle preheating hopper for a magnesium alloy semi-solid forming machine according to any one of claims 1 to 7, characterized in that: The heating element is an electric heating plate (13).

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