Semi-solid magnesium alloy forming die and forming method

Abstract

The present invention discloses a semi-solid magnesium alloy forming die and forming method, which comprises a fixed die mechanism, the fixed die mechanism comprises a fixed die body, a first forming groove is provided inside the fixed die body; a movable die mechanism, the movable die mechanism is movably mounted on the front side of the fixed die mechanism, the movable die mechanism comprises a movable die body, the movable die body is movably connected to the front side of the fixed die body, and a mounting frame is fixedly connected to the surface of the movable die body; a liquid cooling mechanism, the liquid cooling mechanism is fixedly connected to the front side of the movable die mechanism, and the liquid cooling mechanism comprises a hollow liquid cooling plate. The technical problem to be solved by the present invention is that the existing semi-solid magnesium alloy forming die is not convenient for efficiently cooling the formed magnesium alloy parts during use, which prolongs the time required for the magnesium alloy parts to be safely removed from the die, reduces the production efficiency, and the uneven and insufficient cooling will cause poor solidification of the magnesium alloy in some areas, increasing the scrap rate.

Description

Technical Field

[0001] The invention relates to the technical field of metal casting, in particular to a semi-solid magnesium alloy forming die and a forming method. Background Art

[0002] Semi-solid magnesium alloy forming mold is a mold specially used for semi-solid magnesium alloy forming process. This forming technology combines the advantages of traditional casting and plastic processing, so that magnesium alloy presents unique semi-solid characteristics during processing. It is neither completely liquid nor completely solid, but a viscous slurry state with shear thinning characteristics, containing solid particles and a small amount of liquid phase. During the forming process, the magnesium alloy raw material is first heated to the semi-solid range to form a solid-liquid two-phase mixture. The magnesium alloy in this state has good fluidity and plasticity.

[0003] A semi-solid injection molding mold structure and molding process for a magnesium alloy product with Chinese patent application number 202111403394.1, the semi-solid injection molding mold structure for a magnesium alloy product includes: a mounting frame for support; a rotating support intermittently rotatably arranged on the mounting frame; a plurality of lower molds are arranged in a circular array outside the rotating support; the lower mold is rotatably mounted on the rotating support; a plurality of upper molds are respectively arranged on the lower mold; the upper mold is height-adjustable; the lower mold includes a movable base arranged at its bottom opening, and the movable base is elastically mounted on the lower mold; a flipping mechanism for driving the lower mold to flip 180° twice; and a pounding mechanism, including a driving cylinder and an executing cylinder arranged on the mounting frame, the driving cylinder is used to drive the executing cylinder to extend; the executing cylinder is used to resist the movable base on the mold in the flipping state; the lower mold in the unloading state provides power for the driving cylinder.

[0004] During use, the existing semi-solid magnesium alloy forming molds are not convenient for efficiently cooling the formed magnesium alloy parts, which prolongs the time required to safely remove the magnesium alloy parts from the molds and reduces production efficiency. In addition, uneven and insufficient cooling will cause poor solidification of the magnesium alloy in some areas, increasing the scrap rate. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing semi-solid magnesium alloy forming mold is not convenient for efficiently cooling the formed magnesium alloy parts during use, which prolongs the time required for the magnesium alloy parts to be safely removed from the mold and reduces production efficiency. In addition, uneven and insufficient cooling will cause poor solidification of the magnesium alloy in some areas, increasing the scrap rate.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a semi-solid magnesium alloy forming die, comprising:

[0007] A fixed mold mechanism, the fixed mold mechanism comprising a fixed mold body, a first molding groove is provided inside the fixed mold body;

[0008] A movable mold mechanism, the movable mold mechanism is movably mounted on the front side of the fixed mold mechanism, the movable mold mechanism comprises a movable mold body, the movable mold body is movably connected to the front side of the fixed mold body, and a mounting frame is fixedly connected to the surface of the movable mold body;

[0009] A liquid cooling mechanism, the liquid cooling mechanism is fixedly connected to the front side of the movable mold mechanism, and the liquid cooling mechanism includes a hollow liquid cooling plate;

[0010] The auxiliary heat dissipation mechanism is installed on the left and right sides of the fixed mold mechanism and the movable mold mechanism.

[0011] As a preferred solution of the semi-solid magnesium alloy forming mold described in the present invention, wherein: a mounting plate is fixedly connected to the rear side of the fixed mold body, an injection nozzle is fixedly connected to the rear side of the mounting plate, an injection hole is opened at the center of the fixed mold body and the mounting plate, and the injection hole is connected to the injection nozzle and the first forming groove.

[0012] As a preferred solution of the semi-solid magnesium alloy forming mold described in the present invention, wherein: the front side of the interior of the fixed mold body is respectively provided with a hexagonal groove, an arc groove and a surrounding groove, the hexagonal groove is located outside the arc groove and is connected with it, the arc groove is located outside the surrounding groove, the surrounding groove is located outside the first forming groove, the top and bottom of the surrounding groove are provided with connecting flow channels, the connecting flow channels are connected with the arc groove, the top and bottom of the fixed mold body are respectively fixedly installed with a first liquid inlet valve and a first liquid outlet valve, the first liquid inlet valve and the first liquid outlet valve are connected with the hexagonal groove.

[0013] As a preferred solution of the semi-solid magnesium alloy forming mold described in the present invention, a telescopic cavity is provided inside the fixed mold body, a memory alloy spring is provided inside the telescopic cavity, a sealing piece is fixedly connected to one end of the memory alloy spring, the sealing piece is movably connected to the telescopic cavity and the inner wall of the connecting flow channel, and a through hole is provided on the sealing piece.

[0014] As a preferred solution of the semi-solid magnesium alloy forming mold described in the present invention, a vortex coolant flow channel is opened on the rear side of the fixed mold body, and the top and bottom of the vortex coolant flow channel are opened with diversion grooves and flow holes connected thereto, and the flow holes are connected to the hexagonal grooves.

[0015] As a preferred solution of the semi-solid magnesium alloy forming mold described in the present invention, wherein: a second forming groove and a limiting hole are provided on the rear side of the movable mold body, a positioning pin is fixedly connected to the rear side of the movable mold body, a positioning hole is provided on the front side of the fixed mold body, the positioning pin extends to the inner cavity of the positioning hole and is movably connected to the inner wall of the positioning hole, a push rod is movably connected to the inner wall of the limiting hole, a return spring is movably sleeved on the surface of the push rod, a telescopic hydraulic cylinder and a discharging hydraulic cylinder are respectively fixedly installed on the front side of the mounting frame, and the piston rod of the discharging hydraulic cylinder is fixedly connected to the front end of the push rod.

[0016] As a preferred solution of the semi-solid magnesium alloy forming mold described in the present invention, the rear side of the hollow liquid cooling plate is fixedly connected to the front side of the movable mold body, the front side of the hollow liquid cooling plate is fixedly connected to a plurality of heat sinks, the heat sinks are made of aluminum alloy material, and the top and bottom of the hollow liquid cooling plate are respectively fixedly installed with a second liquid inlet valve and a second liquid outlet valve connected thereto.

[0017] As a preferred solution of the semi-solid magnesium alloy forming die of the present invention, the inner wall of the hollow liquid cooling plate is fixedly connected with a plurality of surrounding partitions, and a plurality of buffer holes are opened on the partitions.

[0018] As a preferred solution of the semi-solid magnesium alloy forming mold described in the present invention, the auxiliary heat dissipation mechanism includes a rack and a rotating seat, the rear side of the rack is fixedly connected to a connecting seat, the connecting seat is fixedly installed on the surface of the fixed mold body, the rotating seat is fixedly connected to the surface of the mounting frame, one side of the rotating seat is rotatably connected to a gear meshing with the rack, and one side of the gear is fixedly connected to a fan blade.

[0019] A forming method of a semi-solid magnesium alloy forming die comprises the following steps:

[0020] S1. Install the fixed mold mechanism and the movable mold mechanism on the semi-solid magnesium alloy injection equipment. The fixed mold mechanism is fixed by a mounting plate, and the movable mold mechanism is fixed by a telescopic hydraulic cylinder. A mounting flange is provided at the front end of the telescopic hydraulic cylinder to assist in the installation. Install the injection nozzle on the injection nozzle of the injection equipment.

[0021] S2. The piston rod of the telescopic hydraulic cylinder extends, driving the mounting frame and the movable mold body to move backward, so that the movable mold body fits in front of the fixed mold body. At the same time, the movable mold body drives the positioning pin to be inserted into the positioning hole to accurately position the movable mold body and the fixed mold body.

[0022] S3, after the docking is completed, the semi-solid magnesium alloy enters the first molding groove through the injection nozzle and the injection hole, and enters the second molding groove connected to the first molding groove to form a magnesium alloy part;

[0023] S4, the external coolant first enters the hexagonal groove through the first liquid inlet valve, and enters the arc groove and the flow hole through the hexagonal groove. The coolant inside the flow hole enters the diverter groove. When the coolant is in the hexagonal groove and the arc groove, it absorbs the heat of the front side of the fixed mold body to cool the middle position of the magnesium alloy part. The coolant inside the diverter groove enters the vortex coolant flow channel to cool the rear side of the magnesium alloy part. The coolant after cooling and absorbing heat is discharged through the first liquid outlet valve and refluxed into the coolant circulation device;

[0024] S5. When the heat of the fixed mold body is too high, the memory alloy spring in the telescopic cavity stretches, driving the plugging piece to slide inside the telescopic cavity. The plugging piece slides inside the connecting flow channel and aligns the through hole and the connecting flow channel, so that the coolant enters the surrounding groove for circulation. During the circulation process, the magnesium alloy parts inside the first molding groove are heat-absorbed, and the cooling efficiency of the magnesium alloy parts is improved. The surrounding groove is opened and closed by temperature, which can avoid unnecessary energy consumption, ensure that the mold temperature remains consistent throughout the entire molding cycle, and reduce casting defects caused by temperature fluctuations.

[0025] S6. When the temperature of the fixed mold body is lower than the deformation temperature of the memory alloy spring, the memory alloy spring retracts and drives the blocking member to reset, so that the through hole and the connecting flow channel are misaligned, and the connecting flow channel continues to be closed;

[0026] S7. When the magnesium alloy part inside the fixed mold mechanism is cooled, the movable mold mechanism is started, the piston rod of the telescopic hydraulic cylinder is retracted, and the mounting frame and the movable mold body are driven to move forward. During the process of the movable mold body moving forward, the liquid cooling mechanism absorbs heat from the movable mold body to cool the magnesium alloy part inside the second molding groove.

[0027] S8. When the liquid cooling mechanism is working, the external coolant enters the hollow liquid cooling plate through the second liquid inlet valve to absorb the heat on the hollow liquid cooling plate and the moving mold body. When the coolant is inside the hollow liquid cooling plate, the partition blocks the coolant, and the coolant flows down through the buffer hole on the partition, and flows back to the coolant circulation device through the second liquid outlet valve, slowing down the flow speed of the coolant through the partition and the buffer hole, thereby increasing the heat absorption of the coolant.

[0028] S9. During the movement of the movable mold mechanism, the auxiliary heat dissipation mechanism is also driven to work. The mounting frame drives the rotating seat to move forward, and the rotating seat drives the gear to rotate on one side of the rack to limit the moving trajectory of the movable mold mechanism. The gear drives the fan blades to rotate. The fan blades are located on the left and right sides of the top and bottom of the heat sink. The wind force generated during the rotation of the fan blades takes away the hot air near the heat sink, thereby improving the heat dissipation efficiency of the heat sink, so that the heat sink can efficiently dissipate the coolant inside the hollow liquid cooling plate;

[0029] S10. When the magnesium alloy part inside the movable mold mechanism is cooled, the piston rod of the discharge hydraulic cylinder extends to drive the push rod to move forward. The push rod slides inside the limit hole and pushes out the magnesium alloy part inside the second forming groove, thereby realizing automatic discharge of the magnesium alloy part. After the discharge is completed, the discharge hydraulic cylinder drives the push rod to reset.

[0030] Beneficial effects of the present invention:

[0031] 1. The present invention ensures that the coolant can be evenly distributed and improves the heat exchange efficiency through the coordinated use of hexagonal grooves, arc grooves, surrounding grooves and vortex coolant flow channels, and increases the contact area between the coolant and the mold, thereby improving the heat exchange efficiency, thereby reducing the cooling time and the amount of coolant used. The flow rate and flow direction of the coolant are controlled by the coordinated use of hollow liquid cooling plates and heat sinks, as well as internal partitions and buffer holes, so that heat conduction can be enhanced.

[0032] 2. The present invention uses a memory alloy spring and a blocking piece to automatically open or close the surrounding groove according to the temperature of the fixed mold body, thereby avoiding unnecessary energy consumption and ensuring the stability of the temperature of the fixed mold body.

[0033] 3. The linkage mechanism of the rack and gear of the present invention utilizes the movement of the movable mold mechanism to drive the fan blades to rotate, accelerates the air flow around the heat sink, and improves the heat dissipation efficiency. The movement of the movable mold mechanism is automatically driven without additional energy, and the heat dissipation efficiency is improved by increasing air flow, thereby further saving energy.

[0034] 4. The present invention ensures the precise alignment of the movable mold body and the fixed mold body by using the positioning pins and the positioning holes, avoiding uneven cooling caused by mold misalignment, and ensures the temperature control of the magnesium alloy parts during the forming process by using the first molding groove and the second molding groove in combination with the cooling structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is the main axonometric view of the present invention;

[0036] Figure 2 is a rear axonometric view of the present invention;

[0037] Figure 3 It is a front view of the present invention;

[0038] Figure 4 It is the main axonometric view of the fixed mold mechanism of the present invention;

[0039] Figure 5 It is a rear axonometric view of the fixed mold mechanism of the present invention;

[0040] Figure 6 It is a side section isometric view of the fixed mold mechanism of the present invention;

[0041] Figure 7 It is a front view and a sectional isometric view of the fixed mold mechanism of the present invention;

[0042] Figure 8 A schematic diagram of closing the connecting flow channel of the present invention;

[0043] Fig. 9 It is a schematic diagram of opening the connecting flow channel of the present invention;

[0044] Fig.10 It is a rear cross-sectional isometric view of the fixed mold mechanism of the present invention;

[0045] Fig.11 It is a main axonometric view of the movable mold mechanism of the present invention;

[0046] Fig.12 It is a rear axonometric view of the movable mold mechanism of the present invention;

[0047] Fig.13 It is a rear axonometric view of the movable mold body of the present invention;

[0048] Fig.14 It is a front axonometric view of the liquid cooling mechanism of the present invention;

[0049] Fig.15 It is a front cross-sectional view of the liquid cooling mechanism of the present invention;

[0050] Fig.16 This is a front axonometric view of the auxiliary heat dissipation mechanism of the present invention.

[0051] In the figure: 100, fixed mold mechanism; 101, fixed mold body; 102, positioning hole; 103, first molding groove; 104, first liquid outlet valve; 105, first liquid inlet valve; 106, injection nozzle; 107, mounting plate; 108, flow hole; 109, vortex coolant flow channel; 110, injection hole; 111, memory alloy spring; 112, blocking member; 113, surrounding groove; 114, arc groove; 115, hexagonal groove; 116, connecting flow channel; 117, through hole; 118, telescopic cavity; 119, diverter groove; 200, movable mold mechanism; 201, movable Mould body; 202, reset spring; 203, push rod; 204, discharge hydraulic cylinder; 205, telescopic hydraulic cylinder; 206, mounting frame; 207, positioning pin; 208, second forming groove; 209, limiting hole; 300, liquid cooling mechanism; 301, hollow liquid cooling plate; 302, second liquid inlet valve; 303, heat sink; 304, assembly hole; 305, second liquid outlet valve; 306, partition; 307, buffer hole; 400, auxiliary heat dissipation mechanism; 401, rack; 402, rotating seat; 403, gear; 404, connecting seat; 405, fan blade. DETAILED DESCRIPTION

[0052] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0053] Embodiment 1, as Figure 1-16 As shown, this embodiment provides a semi-solid magnesium alloy forming die, including a fixed die mechanism 100 , wherein the fixed die mechanism 100 includes a fixed die body 101 , and a first forming groove 103 is formed inside the fixed die body 101 .

[0054] Furthermore, a mounting plate 107 is fixedly connected to the rear side of the fixed mold body 101, and an injection nozzle 106 is fixedly connected to the rear side of the mounting plate 107. An injection hole 110 is opened at the center of the fixed mold body 101 and the mounting plate 107, and the injection hole 110 is connected to the injection nozzle 106 and the first molding groove 103.

[0055] Furthermore, a hexagonal groove 115, an arc groove 114 and a surrounding groove 113 are respectively opened on the front side of the interior of the fixed mold body 101. The hexagonal groove 115 is located outside the arc groove 114 and is connected thereto. The arc groove 114 is located outside the surrounding groove 113. The surrounding groove 113 is located outside the first molding groove 103. Connecting channels 116 are opened on the top and bottom of the surrounding groove 113. The connecting channel 116 is connected to the arc groove 114. The first liquid inlet valve 105 and the first liquid outlet valve 104 are respectively fixedly installed on the top and bottom of the fixed mold body 101. The first liquid inlet valve 105 and the first liquid outlet valve 104 are connected to the hexagonal groove 115.

[0056] Furthermore, a telescopic cavity 118 is provided inside the fixed mold body 101, and a memory alloy spring 111 is provided inside the telescopic cavity 118. A sealing member 112 is fixedly connected to one end of the memory alloy spring 111. The sealing member 112 is movably connected to the telescopic cavity 118 and the inner wall of the connecting channel 116, and a through hole 117 is provided on the sealing member 112.

[0057] Furthermore, a vortex coolant flow channel 109 is provided at the rear side of the interior of the fixed mold body 101 , and a diversion groove 119 and a flow hole 108 connected thereto are provided at the top and bottom of the vortex coolant flow channel 109 , and the flow hole 108 is connected to the hexagonal groove 115 .

[0058] A hexagonal groove 115, an arc groove 114, a surrounding groove 113 and a vortex coolant flow channel 109 are designed inside the fixed mold body 101 to ensure that the coolant can be evenly distributed, improve the heat exchange efficiency, increase the contact area between the coolant and the mold, improve the heat exchange efficiency, and thus reduce the cooling time and the amount of coolant used.

[0059] By using the memory alloy spring 111 and the blocking member 112 in combination, the surrounding groove 113 can be automatically opened or closed according to the temperature of the fixed mold body 101, thereby avoiding unnecessary energy consumption and ensuring the temperature stability of the fixed mold body 101.

[0060] When the mold temperature rises, the memory alloy spring 111 stretches and automatically opens the surrounding groove 113 to introduce coolant for effective cooling. When the temperature drops to a certain level, the memory alloy spring 111 retracts and automatically closes the surrounding groove 113 to reduce the consumption of coolant. The characteristics of the memory alloy spring 111 allow the sealing member 112 to automatically open or close according to changes in the mold temperature, ensuring that the mold temperature is within the ideal working range to avoid overheating or overcooling.

[0061] Furthermore, it also includes a movable mold mechanism 200, which is movably installed on the front side of the fixed mold mechanism 100. The movable mold mechanism 200 includes a movable mold body 201, which is movably connected to the front side of the fixed mold body 101, and a mounting frame 206 is fixedly connected to the surface of the movable mold body 201.

[0062] Furthermore, a second molding groove 208 and a limiting hole 209 are provided on the rear side of the movable mold body 201, a positioning pin 207 is fixedly connected to the rear side of the movable mold body 201, a positioning hole 102 is provided on the front side of the fixed mold body 101, the positioning pin 207 extends to the inner cavity of the positioning hole 102 and is movably connected to the inner wall thereof, a push rod 203 is movably connected to the inner wall of the limiting hole 209, a return spring 202 is movably sleeved on the surface of the push rod 203, a telescopic hydraulic cylinder 205 and a discharging hydraulic cylinder 204 are fixedly installed on the front side of the mounting frame 206, and the piston rod of the discharging hydraulic cylinder 204 is fixedly connected to the front end of the push rod 203.

[0063] When the push rod 203 moves forward to push out the magnesium alloy part, the return spring 202 is squeezed. When the push rod 203 is reset, the return spring 202 stretches and presses against the push rod 203 to prevent the push rod 203 from shaking inside the limiting hole 209.

[0064] The positioning pins 207 and the positioning holes 102 are used in combination to ensure accurate alignment of the movable mold body 201 and the fixed mold body 101, thereby avoiding uneven cooling caused by mold misalignment.

[0065] The temperature control of the magnesium alloy part during the forming process is ensured by the coordinated use of the first forming groove 103 and the second forming groove 208 and the synergistic effect with the cooling structure.

[0066] Furthermore, it also includes a liquid cooling mechanism 300 , which is fixedly connected to the front side of the movable mold mechanism 200 , and includes a hollow liquid cooling plate 301 .

[0067] Furthermore, the rear side of the hollow liquid cooling plate 301 is fixedly connected to the front side of the movable mold body 201, and a plurality of heat sinks 303 are fixedly connected to the front side of the hollow liquid cooling plate 301. The heat sinks 303 are made of aluminum alloy material, and the top and bottom of the hollow liquid cooling plate 301 are respectively fixedly installed with a second liquid inlet valve 302 and a second liquid outlet valve 305 connected thereto.

[0068] The flow rate and direction of the coolant can be controlled by using the hollow liquid cooling plate 301 and the heat sink 303 in combination with the internal partition 306 and the buffer hole 307, thereby enhancing heat conduction.

[0069] The coolant circulates through the first inlet valve 105, the first outlet valve 104, the second inlet valve 302 and the second outlet valve 305 to ensure the continuous flow of the cooling medium, and the flow rate of the coolant can be adjusted according to the actual temperature requirements of the mold to achieve precise temperature control.

[0070] Furthermore, a plurality of surrounding partitions 306 are fixedly connected to the inner wall of the hollow liquid cooling plate 301 , and a plurality of buffer holes 307 are formed on the partitions 306 .

[0071] Furthermore, an assembly hole 304 is provided at the center of the hollow liquid cooling plate 301 , and the push rod 203 is located in the inner cavity of the assembly hole 304 and movably connected to the inner wall thereof.

[0072] Furthermore, an auxiliary heat dissipation mechanism 400 is included, and the auxiliary heat dissipation mechanism 400 is installed on the left and right sides of the fixed mold mechanism 100 and the movable mold mechanism 200 .

[0073] Furthermore, the auxiliary heat dissipation mechanism 400 includes a rack 401 and a rotating seat 402, the rear side of the rack 401 is fixedly connected to a connecting seat 404, the connecting seat 404 is fixedly installed on the surface of the fixed mold body 101, the rotating seat 402 is fixedly connected to the surface of the mounting frame 206, one side of the rotating seat 402 is rotatably connected to a gear 403 meshing with the rack 401, and one side of the gear 403 is fixedly connected to a fan blade 405.

[0074] The auxiliary heat dissipation mechanism 400 uses the linkage mechanism of the rack 401 and the gear 403 to drive the fan blade 405 to rotate by utilizing the movement of the movable mold mechanism 200, thereby accelerating the air flow around the heat sink 303 and improving the heat dissipation efficiency. It is automatically driven by the movement of the movable mold mechanism 200 without the need for additional energy, and the heat dissipation efficiency is improved by increasing the air flow, thereby further saving energy.

[0075] Through precise temperature control and multi-level cooling structure, the temperature of each part of the mold is ensured to be uniform, avoiding deformation, cracks or internal defects of the casting caused by local overheating or overcooling, and improving the dimensional accuracy and surface quality of the casting. Temperature control can also reduce the thermal stress of the mold during the cooling process, prevent fatigue and damage of the mold material, and thus improve the integrity and reliability of the casting.

[0076] Efficient cooling reduces the time required for the mold to reach operating temperature, and also reduces the number of thermal cycles between high and low temperature states, extending the service life of the mold. By reducing the thermal expansion and contraction of the mold, the wear rate of the mold material is reduced, thereby reducing the maintenance and replacement frequency of the mold.

[0077] Efficient cooling and precise temperature control shorten the cooling time and molding cycle of the mold, improve production speed and capacity, and the automatic start and shutdown of the memory alloy spring 111, the sealing member 112 and the auxiliary heat dissipation mechanism 400 reduce manual intervention, improve the automation level of the production process, and reduce operational errors.

[0078] Embodiment 2, as Figure 1-16 As shown, as a second embodiment of the present invention, this embodiment provides a forming method of a semi-solid magnesium alloy forming die, comprising the following steps:

[0079] S1. Install the fixed mold mechanism 100 and the movable mold mechanism 200 on the semi-solid magnesium alloy injection equipment. The fixed mold mechanism 100 is fixed by the mounting plate 107, and the movable mold mechanism 200 is fixed by the telescopic hydraulic cylinder 205. The front end of the telescopic hydraulic cylinder 205 is provided with a mounting flange to assist the installation. Install the injection nozzle 106 on the injection nozzle of the injection equipment;

[0080] S2, the piston rod of the telescopic hydraulic cylinder 205 extends, driving the mounting frame 206 and the movable mold body 201 to move backward, so that the movable mold body 201 fits in front of the fixed mold body 101, and at the same time, the movable mold body 201 drives the positioning pin 207 to be inserted into the positioning hole 102, so as to accurately position the movable mold body 201 and the fixed mold body 101;

[0081] S3, after the docking is completed, the semi-solid magnesium alloy enters the first molding groove 103 through the injection nozzle 106 and the injection hole 110, and enters the second molding groove 208 connected to the first molding groove 103 to form a magnesium alloy part;

[0082] S4, the external coolant first enters the hexagonal groove 115 through the first liquid inlet valve 105, and enters the arc groove 114 and the flow hole 108 through the hexagonal groove 115. The coolant in the flow hole 108 enters the diverter groove 119. When the coolant is in the hexagonal groove 115 and the arc groove 114, the heat of the front side of the fixed mold body 101 is absorbed to cool the middle position of the magnesium alloy part. The coolant in the diverter groove 119 enters the vortex coolant flow channel 109 to cool the rear side of the magnesium alloy part. The coolant after cooling and absorbing heat is discharged through the first liquid outlet valve 104 and flows back to the coolant circulation device;

[0083] S5. When the heat of the fixed mold body 101 is too high, the memory alloy spring 111 in the inner cavity of the telescopic cavity 118 stretches, driving the blocking member 112 to slide inside the telescopic cavity 118. The blocking member 112 slides inside the connecting flow channel 116 and aligns the through hole 117 with the connecting flow channel 116, so that the coolant enters the surrounding groove 113 for circulation. During the circulation process, the magnesium alloy parts inside the first molding groove 103 are heat-absorbed, and the cooling efficiency of the magnesium alloy parts is improved. The surrounding groove 113 is opened and closed by temperature, which can avoid unnecessary energy consumption, ensure that the mold temperature remains consistent throughout the entire molding cycle, and reduce casting defects caused by temperature fluctuations;

[0084] S6. When the temperature of the fixed mold body 101 is lower than the deformation temperature of the memory alloy spring 111, the memory alloy spring 111 retracts to drive the blocking member 112 to reset, so that the through hole 117 and the connecting flow channel 116 are misaligned, and the connecting flow channel 116 continues to be closed;

[0085] S7, when the magnesium alloy part inside the fixed mold mechanism 100 is cooled, the movable mold mechanism 200 is started, the piston rod of the telescopic hydraulic cylinder 205 is retracted, and the mounting frame 206 and the movable mold body 201 are driven to move forward. During the process of the movable mold body 201 moving forward, the liquid cooling mechanism 300 absorbs heat from the movable mold body 201 to cool the magnesium alloy part inside the second molding groove 208;

[0086] S8, when the liquid cooling mechanism 300 is working, the external coolant enters the hollow liquid cooling plate 301 through the second liquid inlet valve 302 to absorb the heat on the hollow liquid cooling plate 301 and the movable mold body 201. When the coolant is inside the hollow liquid cooling plate 301, the partition 306 blocks the coolant, and the coolant flows down through the buffer hole 307 on the partition 306, and flows back to the coolant circulation device through the second liquid outlet valve 305, and the flow speed of the coolant is slowed down through the partition 306 and the buffer hole 307, thereby increasing the heat absorption of the coolant;

[0087] S9, during the movement of the movable mold mechanism 200, the auxiliary heat dissipation mechanism 400 is also driven to work, the mounting frame 206 drives the rotating seat 402 to move forward, and the rotating seat 402 drives the gear 403 to rotate on one side of the rack 401 to limit the movement trajectory of the movable mold mechanism 200, and the gear 403 drives the fan blades 405 to rotate, and the fan blades 405 are located on the left and right sides of the top and bottom of the heat sink 303. The wind force generated during the rotation of the fan blades 405 takes away the hot air near the heat sink 303, thereby improving the heat dissipation efficiency of the heat sink 303, so that the heat sink 303 can efficiently dissipate the coolant inside the hollow liquid cooling plate 301;

[0088] S10. When the magnesium alloy part inside the movable mold mechanism 200 is cooled, the piston rod of the discharge hydraulic cylinder 204 extends, driving the push rod 203 to move forward. The push rod 203 slides inside the limiting hole 209 and pushes out the magnesium alloy part inside the second forming groove 208, realizing automatic discharge of the magnesium alloy part. After the discharge is completed, the discharge hydraulic cylinder 204 drives the push rod 203 to reset.

Claims

1. A semi-solid magnesium alloy forming die, characterized in that: include, A fixed mold mechanism (100), the fixed mold mechanism (100) comprising a fixed mold body (101), a first molding groove (103) being provided inside the fixed mold body (101); A movable mold mechanism (200), the movable mold mechanism (200) being movably mounted on the front side of the fixed mold mechanism (100), the movable mold mechanism (200) comprising a movable mold body (201), the movable mold body (201) being movably connected to the front side of the fixed mold body (101), and a mounting frame (206) being fixedly connected to the surface of the movable mold body (201); A liquid cooling mechanism (300), the liquid cooling mechanism (300) being fixedly connected to the front side of the movable mold mechanism (200), the liquid cooling mechanism (300) comprising a hollow liquid cooling plate (301); An auxiliary heat dissipation mechanism (400), the auxiliary heat dissipation mechanism (400) being installed on the left and right sides of the fixed mold mechanism (100) and the movable mold mechanism (200); The front side of the interior of the fixed mold body (101) is respectively provided with a hexagonal groove (115), an arc groove (114) and a surrounding groove (113); the hexagonal groove (115) is located outside the arc groove (114) and is in communication with the arc groove (114); the arc groove (114) is located outside the surrounding groove (113); the surrounding groove (113) is located outside the first molding groove (103); the top and bottom of the surrounding groove (113) are both provided with connecting flow channels (116); the connecting flow channels (116) are in communication with the arc groove (114); the top and bottom of the fixed mold body (101) are respectively fixedly provided with a first liquid inlet valve (105) and a first liquid outlet valve (104); the first liquid inlet valve (105) and the first liquid outlet valve (104) are in communication with the hexagonal groove (115); A telescopic cavity (118) is provided inside the fixed mold body (101), a memory alloy spring (111) is provided inside the telescopic cavity (118), one end of the memory alloy spring (111) is fixedly connected to a blocking piece (112), the blocking piece (112) is movably connected to the telescopic cavity (118) and the inner wall of the connecting flow channel (116), and a through hole (117) is provided on the blocking piece (112); A vortex coolant flow channel (109) is provided at the rear side of the interior of the fixed mold body (101), and a diversion groove (119) and a flow hole (108) in communication with the vortex coolant flow channel (109) are provided at the top and bottom of the vortex coolant flow channel (109), and the flow hole (108) is in communication with the hexagonal groove (115); The auxiliary heat dissipation mechanism (400) comprises a rack (401) and a rotating seat (402); the rear side of the rack (401) is fixedly connected to a connecting seat (404); the connecting seat (404) is fixedly mounted on the surface of the fixed mold body (101); the rotating seat (402) is fixedly connected to the surface of the mounting frame (206); one side of the rotating seat (402) is rotatably connected to a gear (403) meshing with the rack (401); and one side of the gear (403) is fixedly connected to a fan blade (405).

2. The semi-solid magnesium alloy forming die according to claim 1, characterized in that: A mounting plate (107) is fixedly connected to the rear side of the fixed mold body (101), and an injection nozzle (106) is fixedly connected to the rear side of the mounting plate (107). An injection hole (110) is provided at the center of the fixed mold body (101) and the mounting plate (107), and the injection hole (110) is connected to the injection nozzle (106) and the first molding groove (103).

3. The semi-solid magnesium alloy forming die according to claim 2, characterized in that: A second molding groove (208) and a limiting hole (209) are provided on the rear side of the movable mold body (201); a positioning pin (207) is fixedly connected to the rear side of the movable mold body (201); a positioning hole (102) is provided on the front side of the fixed mold body (101); the positioning pin (207) extends into the inner cavity of the positioning hole (102) and is movably connected to the inner wall of the positioning hole (102); a push rod (203) is movably connected to the inner wall of the limiting hole (209); a return spring (202) is movably sleeved on the surface of the push rod (203); a telescopic hydraulic cylinder (205) and a discharge hydraulic cylinder (204) are respectively fixedly installed on the front side of the mounting frame (206); a piston rod of the discharge hydraulic cylinder (204) is fixedly connected to the front end of the push rod (203).

4. The semi-solid magnesium alloy forming die according to claim 3, characterized in that: The rear side of the hollow liquid cooling plate (301) is fixedly connected to the front side of the movable mold body (201); a plurality of heat sinks (303) are fixedly connected to the front side of the hollow liquid cooling plate (301); the heat sinks (303) are made of aluminum alloy material; and a second liquid inlet valve (302) and a second liquid outlet valve (305) connected thereto are fixedly installed on the top and bottom of the hollow liquid cooling plate (301), respectively.

5. The semi-solid magnesium alloy forming die according to claim 4, characterized in that: A plurality of surrounding partitions (306) are fixedly connected to the inner wall of the hollow liquid cooling plate (301), and a plurality of buffer holes (307) are provided on the partitions (306).

6. A forming method of a semi-solid magnesium alloy forming die, applicable to the semi-solid magnesium alloy forming die according to claim 5, characterized in that: The following steps are included: S1. Installing the fixed mold mechanism (100) and the movable mold mechanism (200) on a semi-solid magnesium alloy injection device, wherein the fixed mold mechanism (100) is fixed by a mounting plate (107), and the movable mold mechanism (200) is fixed by a telescopic hydraulic cylinder (205), wherein a mounting flange is provided at the front end of the telescopic hydraulic cylinder (205) to assist in mounting, and installing the injection nozzle (106) on the injection nozzle of the injection device; S2, the piston rod of the telescopic hydraulic cylinder (205) is extended, driving the mounting frame (206) and the movable mold body (201) to move backward, so that the movable mold body (201) is attached to the front side of the fixed mold body (101), and at the same time, the movable mold body (201) drives the positioning pin (207) to be inserted into the positioning hole (102); S3, after the docking is completed, the semi-solid magnesium alloy enters the first molding groove (103) through the injection nozzle (106) and the injection hole (110), and enters the second molding groove (208) connected to the first molding groove (103) to form a magnesium alloy part; S4, the external coolant first enters the hexagonal groove (115) through the first liquid inlet valve (105), and then enters the arc groove (114) and the flow hole (108) through the hexagonal groove (115). The coolant inside the flow hole (108) enters the diverter groove (119). When the coolant is in the hexagonal groove (115) and the arc groove (114), the heat of the front side of the fixed mold body (101) is absorbed. The coolant inside the diverter groove (119) enters the vortex coolant flow channel (109) to cool the magnesium alloy part. The coolant after cooling and absorbing heat is discharged through the first liquid outlet valve (104) and flows back into the coolant circulation device; S5. When the heat of the fixed mold body (101) is too high, the memory alloy spring (111) in the inner cavity of the telescopic cavity (118) stretches, driving the blocking member (112) to slide inside the telescopic cavity (118). The blocking member (112) slides inside the connecting flow channel (116) and aligns the through hole (117) and the connecting flow channel (116), so that the coolant enters the surrounding groove (113) and circulates. During the circulation process, the magnesium alloy part inside the first molding groove (103) absorbs heat, and the surrounding groove (113) is opened and closed by the temperature. S6. When the temperature of the fixed mold body (101) is lower than the deformation temperature of the memory alloy spring (111), the memory alloy spring (111) retracts to drive the blocking member (112) to reset, so that the through hole (117) and the connecting flow channel (116) are misaligned, and the connecting flow channel (116) continues to be closed; S7. When the magnesium alloy part inside the fixed mold mechanism (100) is cooled, the movable mold mechanism (200) is started, and the piston rod of the telescopic hydraulic cylinder (205) is retracted, driving the mounting frame (206) and the movable mold body (201) to move forward. During the process of the movable mold body (201) moving forward, the liquid cooling mechanism (300) absorbs heat from the movable mold body (201) to cool the magnesium alloy part inside the second molding groove (208); S8, when the liquid cooling mechanism (300) is working, the external cooling liquid enters the interior of the hollow liquid cooling plate (301) through the second liquid inlet valve (302) to absorb the heat on the hollow liquid cooling plate (301) and the movable mold body (201). When the cooling liquid is inside the hollow liquid cooling plate (301), the partition (306) blocks the cooling liquid, and the cooling liquid flows down through the buffer hole (307) on the partition (306) and flows back to the cooling liquid circulation device through the second liquid outlet valve (305), and the flow speed of the cooling liquid is slowed down through the partition (306) and the buffer hole (307); S9, during the movement of the movable mold mechanism (200), the auxiliary heat dissipation mechanism (400) is also driven to work, the mounting frame (206) drives the rotating seat (402) to move forward, the rotating seat (402) drives the gear (403) to rotate on one side of the rack (401) to limit the movement trajectory of the movable mold mechanism (200), and the gear (403) drives the fan blades (405) to rotate, the fan blades (405) are located on the left and right sides of the top and bottom of the heat sink (303), and the wind force generated during the rotation of the fan blades (405) takes away the hot air near the heat sink (303), so that the heat sink (303) dissipates the cooling liquid inside the hollow liquid cooling plate (301); S10. When the magnesium alloy part inside the movable mold mechanism (200) has finished cooling, the piston rod of the discharge hydraulic cylinder (204) extends, driving the push rod (203) to move forward. The push rod (203) slides inside the limiting hole (209) to push out the magnesium alloy part inside the second molding groove (208). After the discharge is completed, the discharge hydraulic cylinder (204) drives the push rod (203) to return to its original position.

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