A zinc alloy handle low-pressure casting equipment

Abstract

The application relates to a zinc alloy handle low-pressure casting equipment and relates to the technical field of low-pressure casting equipment, which comprises a workbench, a smelting furnace, a fixed mold base, a movable mold base, a driving mechanism, an ejection mechanism and a pouring mechanism, further comprises a blowing mechanism and a sealing switching mechanism; the pouring mechanism comprises a gas conveying pipe for conveying gas into the smelting furnace; the blowing mechanism comprises a blowing pipe in communication with the gas conveying pipe and used for blowing when the ejection mechanism works; the sealing switching mechanism comprises a switching block installed on the driving mechanism, a switching rod installed on the switching block, a first sealing ball used for sealing the gas conveying pipe, a second sealing ball used for sealing the blowing pipe and a switching assembly; the switching assembly is used for driving the first sealing ball and the second sealing ball to work synchronously and perform opposite sealing actions. The application can prevent the surface of a molded part from being damaged during ejection, and effectively improves the qualified rate of the molded part.

Description

Technical Field

[0001] This invention relates to the field of low-pressure casting equipment technology, and in particular to a low-pressure casting equipment for zinc alloy handles. Background Technology

[0002] Zinc alloy handles are core hardware accessories for doors, windows, furniture, and bathroom fixtures. They offer advantages such as diverse shapes, delicate textures, and controllable costs, and are widely used in home decoration, commercial projects, and smart homes. Low-pressure casting is the mainstream process for forming zinc alloy handles, characterized by stable filling, fewer casting pores, high forming precision, and high raw material utilization.

[0003] Existing low-pressure casting equipment for zinc alloy handles includes a worktable, a melting furnace, a drive mechanism, a pouring mechanism, a fixed mold base, a moving mold base, and an ejection mechanism. During operation, the fixed mold base is first placed on the worktable. Then, the drive mechanism is activated to move the moving mold base, causing the fixed and moving mold bases to close. Next, the pouring mechanism is activated to transport the molten alloy from the melting furnace to the fixed and moving mold bases. After the molten alloy cools and solidifies, the ejection mechanism is activated to eject the formed part from the fixed mold base. Finally, the part is manually removed.

[0004] In the above structure, when the ejection mechanism ejects the molded part, the molded part will fit tightly against the inner wall of the fixed mold base, thus forming a local vacuum negative pressure adsorption. This greatly increases the demolding resistance, causing damage to the surface of the part when it is forcibly ejected, thereby significantly reducing the yield of the molded part. Summary of the Invention

[0005] To prevent damage to the surface of the molded parts during ejection and effectively improve the yield of molded parts, this invention provides a low-pressure casting equipment for zinc alloy handles.

[0006] This invention provides a low-pressure casting equipment for zinc alloy handles, employing the following technical solution: A low-pressure casting equipment for zinc alloy handles includes a workbench, a melting furnace for storing alloy solution, a fixed mold base mounted on the workbench, a movable mold base for cooperating with the fixed mold base to form parts from the alloy solution, a drive mechanism for driving the movable mold base to move, an ejection mechanism for ejecting the formed parts from the fixed mold base, and a pouring mechanism for conveying the alloy solution in the melting furnace to the fixed mold base and the movable mold base. It also includes a blower mechanism connected to the pouring mechanism and used to blow air when the ejection mechanism is working, and a sealing switching mechanism for switching the pouring mechanism and the blower mechanism to work. The casting mechanism includes a gas supply pipe for supplying gas to the smelting furnace; the blowing mechanism includes a blowing pipe connected to the gas supply pipe and used for blowing air when the ejection mechanism is in operation. The sealing switching mechanism includes a switching block mounted on the drive mechanism, a switching rod mounted on the switching block, a first sealing ball for sealing the air supply pipe, a second sealing ball for sealing the blower pipe, and a switching assembly; the switching assembly is used to drive the first sealing ball and the second sealing ball to work synchronously and perform opposite sealing actions.

[0007] By adopting the above technical solution and setting a sealing switching mechanism, the blowing pipe is automatically closed and the air supply pipe is opened when the mold is closed, so that the equipment enters the pouring state. When the mold is opened and ejected, the air supply pipe is automatically closed and the blowing pipe is opened, so that the equipment switches to the blowing-assisted demolding state. In this way, the airflow is used to break the vacuum negative pressure between the part and the fixed mold base, effectively breaking the vacuum negative pressure adsorption during demolding, preventing damage to the surface of the part during ejection, and improving the part forming qualification rate.

[0008] Optionally, the switching assembly includes a connecting block mounted on the other end of the switching rod, an arc-shaped rod mounted on the connecting block, a first connecting rod hinged to one end of the arc-shaped rod and connected to the first sealing ball, a second connecting rod hinged to the other end of the arc-shaped rod and connected to the second sealing ball, and a hinge seat; The first connecting rod passes through the gas supply pipe, and the second connecting rod passes through the air blowing pipe so that the first sealing ball and the second sealing ball are more stable when rising and falling; the hinge seat is installed on the casting mechanism and is rotatably connected to the arc-shaped rod.

[0009] By adopting the above technical solution, the lifting action of the drive mechanism drives the first sealing ball and the second sealing ball to move in opposite directions, thereby realizing the synchronous switching of the gas supply pipe and the air blowing pipe. Furthermore, the first connecting rod and the second connecting rod pass through the pipe, which improves the stability of the first sealing ball and the second sealing ball during lifting and lowering, thus making the switching between pouring and air blowing more stable.

[0010] Optionally, the blower mechanism further includes a lifting rod slidably mounted in the fixed mold base and a lifting plate mounted on the lifting rod and connected to the ejection mechanism; The lifting plate has an air supply chamber, and the air outlet of the blowing pipe is connected to the air supply chamber; the lifting rod has an air supply channel, and the air supply channel is connected to the air supply chamber so that the air blown by the blowing pipe enters the air supply channel. The air supply channel is provided with an exhaust hole for gas to be discharged so that the air blown by the air pipe can be discharged through the exhaust hole and enter the mold base.

[0011] By adopting the above technical solution, the airflow enters the air delivery chamber of the lifting plate through the air blowing pipe, then flows through the air delivery channel inside the lifting rod, and finally sprays out from the exhaust hole into the interior of the fixed mold base, so that air is continuously blown onto the mating surface of the part and the cavity during the ejection process, thereby breaking the vacuum negative pressure adsorption and reducing the demolding resistance.

[0012] Optionally, the casting mechanism further includes a fixed base mounted on the workbench, an air pump mounted on the fixed base, an air extraction pipe connected to the air pump for extracting external air, a riser pipe installed in the melting furnace for conveying the alloy solution, a suspension disc slidably sleeved on the outside of the riser pipe for extruding and conveying the alloy solution, and a scraping assembly. The scraping assembly is rotatably mounted on the suspension disc to scrape off and collect the solution adhering to the side wall of the smelting furnace.

[0013] By adopting the above technical solution, the gas pump and the gas extraction pipe work together to pressurize the smelting furnace, push the suspension plate down, and squeeze the alloy solution into the riser pipe to achieve stable pouring. At the same time as the suspension plate descends, the scraping component works simultaneously to automatically scrape off the solution adhering to the inner wall of the smelting furnace and collect it, so as to avoid the solution adhering to the inner wall and causing waste.

[0014] Optionally, the scraping assembly includes a support rod mounted on the suspension disk and a scraping ring rotatably mounted on the support rod and in contact with the inner wall of the melting furnace; The surface of the riser pipe is provided with a threaded groove, and the scraper ring is threadedly connected to the threaded groove. The scraper ring is provided with an annular groove on the side near the suspension plate, and the support rod is rotatably installed in the annular groove. The side of the suspension plate away from the alloy solution has a collection groove to collect the solution scraped off by the scraper ring.

[0015] By adopting the above technical solution, the scraping ring is threadedly connected to the threaded groove on the surface of the riser pipe. When the suspension disc is raised and lowered, it drives the scraping ring to rotate and move up and down, thereby achieving comprehensive scraping of the inner wall of the smelting furnace. At the same time, the rotation of the annular groove and the support rod ensures that the scraping ring can rotate flexibly. Then, the scraped solution is collected in a collection tank for subsequent centralized treatment.

[0016] Optionally, the ejection mechanism is mounted on the worktable, and the ejection mechanism includes a placement platform mounted on the worktable, a threaded rod rotatably mounted on the placement platform, a drive block threadedly connected to the threaded rod, a lifting block mounted on the lifting plate, a drive rod hinged between the lifting block and the drive block, and a dual-axis motor mounted on the worktable for driving the threaded rod to rotate; the fixed mold base is detachably mounted on the placement platform.

[0017] By adopting the above technical solution, the dual-axis motor drives the threaded rod to rotate. When the threaded rod rotates, it drives the drive block connected to it to move. When the drive block moves, it drives the drive rod to rotate. When the drive rod rotates, it pushes the lifting plate and the lifting rod to complete the ejection action, thereby ejecting the part from the fixed mold base. At the same time, the fixed mold base can be detachably installed on the placement table, which facilitates the replacement and maintenance of the fixed mold base.

[0018] Optionally, a drive frame is fixedly installed on the placement platform, and the drive mechanism is mounted on the drive frame; The driving mechanism includes a connecting frame mounted on the moving mold base, a hydraulic cylinder mounted on the driving frame for driving the connecting frame to move up and down, and a first limiting telescopic column mounted between the driving frame and the connecting frame; the first limiting telescopic column is used to limit and guide the moving mold base when it moves up and down, so that the moving mold base moves more stably.

[0019] By adopting the above technical solution, the hydraulic cylinder is started to drive the connecting frame to rise and fall. At the same time, the connecting frame rises and falls, driving the moving mold base to rise and fall, thereby realizing the closing and opening of the moving mold base and the fixed mold base. When the mold is closed, the first limit telescopic column is used for limiting and guiding to ensure the accuracy of the moving mold base closing and prevent the moving mold base and the fixed mold base from deviating when closing.

[0020] Optionally, a placement rack is installed on the workbench, and a heat preservation tank is installed on the placement rack. The smelting furnace is installed inside the heat preservation tank to keep the alloy solution inside the smelting furnace warm. The smelting furnace includes a furnace body for storing alloy solution and a removable sealing cover mounted on the furnace body to facilitate the removal of the suspension disc from the furnace body.

[0021] By adopting the above technical solution, the smelting furnace is installed in the heat preservation tank, which keeps the furnace body at a constant temperature to prevent the alloy solution from cooling too early and to ensure casting quality. At the same time, the sealing cover can be detachably installed on the furnace body, which makes it easy to remove the suspension plate from the furnace body and facilitates the treatment of the solution collected in the collection tank.

[0022] Optionally, the riser tube passes through the sealing cover and the inlet is inserted into the furnace body, the moving mold base has a pouring port for the alloy solution to enter, and the outlet of the riser tube is inserted into the pouring port; The furnace body has a liquid inlet connected to a liquid inlet pipe, which passes through the insulation tank. A control valve is installed on the outside of the liquid inlet pipe to control the opening and closing of the liquid inlet pipe.

[0023] By adopting the above technical solution, the riser pipe is fitted with a sealing cap and inserted into the furnace body, and the outlet is inserted into the pouring port of the moving mold base, thereby forming a closed solution transport channel and reducing solution oxidation. At the same time, the inlet pipe is connected to the furnace body and fitted with a heat preservation tank, and the opening and closing of the inlet pipe is controlled by a control valve, which facilitates the addition of alloy solution into the furnace body.

[0024] Optionally, a second limiting telescopic column is installed between the workbench and the lifting plate. The second limiting telescopic column is used to limit and guide the movement of the lifting plate when the lifting plate is raised and lowered. A support base is installed on the workbench, the dual-axis motor is mounted on the support base, a guide plate is installed between the support base and the placement table, and the drive block is slidably sleeved on the guide plate to limit and guide the movement of the drive block.

[0025] By adopting the above technical solution, the second limiting telescopic column is installed between the worktable and the lifting plate, and provides limiting guidance when the lifting plate is raised and lowered, thereby making the parts more stable when ejected. At the same time, the drive block is slidably sleeved on the guide plate to prevent the drive block from deviating when it moves, ensuring the stable operation of the ejection work.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting a sealing switching mechanism, the blowing pipe is automatically closed and the air supply pipe is opened when the mold is closed, so that the equipment enters the pouring state. When the mold is opened and ejected, the air supply pipe is automatically closed and the blowing pipe is opened, so that the equipment switches to the blowing-assisted demolding state. In this way, the airflow is used to break the vacuum negative pressure between the part and the fixed mold base, effectively breaking the vacuum negative pressure adsorption during demolding, preventing damage to the surface of the part during ejection, and improving the part forming qualification rate. 2. By sending airflow through the air pipe into the air delivery chamber of the lifting plate, then through the air delivery channel inside the lifting rod, and finally spraying it out from the exhaust hole into the mold base, air is continuously blown onto the mating surface of the part and the cavity during the ejection process, thereby breaking the vacuum negative pressure adsorption and reducing the demolding resistance. 3. The gas pump and extraction pipe work together to pressurize the smelting furnace, which pushes the suspension plate down and squeezes the alloy solution into the riser pipe to achieve stable pouring. At the same time as the suspension plate descends, the scraping component works simultaneously to automatically scrape off the solution adhering to the inner wall of the smelting furnace and collect it, so as to avoid the solution adhering to the inner wall and causing waste. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of a low-pressure casting equipment for zinc alloy handles; Figure 2 This is a partial sectional view of a low-pressure casting equipment for zinc alloy handles; Figure 3 This is a schematic diagram of the drive mechanism; Figure 4 This is a schematic diagram of the casting mechanism; Figure 5 yes Figure 2 A magnified view of part A in the middle; Figure 6 This is a cross-sectional view of the ejector mechanism and the blower mechanism; Figure 7 yes Figure 6 A magnified view of part B in the middle section; Figure 8 This is a cross-sectional view of the sealing switching mechanism.

[0028] The parts referred to by the numbers in the above attached diagrams are as follows: 1. Workbench; 11. Placement rack; 12. Insulation tank; 13. Drive frame; 2. Melting furnace; 21. Furnace body; 22. Sealing cover; 23. Liquid inlet pipe; 24. Control valve; 3. Fixed mold base; 4. Moving mold base; 41. Sprue; 5. Drive mechanism; 51. Connecting frame; 52. Hydraulic cylinder; 53. First limit telescopic column; 6. Sprue mechanism; 61. Gas supply pipe; 62. Fixed base; 63. Gas pump; 64. Suction pipe; 65. Lifting pipe; 66. Suspension plate; 67. Scraping assembly; 671. Support rod; 672. Scraping ring; 673. Circular groove; 68. Threaded groove; 69. Collection tank; 7. Ejection mechanism; 71. 71. Placement platform; 72. Support base; 73. Dual-axis motor; 74. Threaded rod; 75. Drive block; 76. Drive rod; 77. Lifting block; 78. Guide plate; 79. Second limit telescopic column; 80. Blowering mechanism; 81. Lifting rod; 82. Lifting plate; 83. Blowering pipe; 84. Air supply chamber; 85. Air supply channel; 86. Exhaust port; 91. Sealing switching mechanism; 92. Switching block; 93. Switching rod; 94. First sealing ball; 95. Second sealing ball; 96. Switching assembly; 97. Connecting block; 98. Arc rod; 99. First connecting rod; 90. Second connecting rod; 91. Hinge base; 92. Arc plate; 93. Hinge rod; 94. Arc block. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0030] This invention discloses a low-pressure casting equipment for zinc alloy handles.

[0031] Reference Figure 1 as well as Figure 2 A low-pressure casting equipment for zinc alloy handles includes a workbench 1, a melting furnace 2, a fixed mold base 3, a moving mold base 4, a drive mechanism 5, an ejection mechanism 7, a pouring mechanism 6, a blower mechanism 8, and a sealing switching mechanism 9.

[0032] A placement rack 11 is fixedly installed on the workbench 1. A heat preservation tank 12 is fixedly installed on the side of the placement rack 11 near the workbench 1. The melting furnace 2 is fixedly installed inside the heat preservation tank 12. A fixed mold base 3 is detachably installed on the workbench 1. A movable mold base 4 is used to cooperate with the fixed mold base 3 to form a complete mold for the alloy solution to form parts. A drive mechanism 5 is installed on the workbench 1 and is used to drive the movable mold base 4 to move and close with the fixed mold base 3. An ejection mechanism 7 is fixedly installed on the workbench 1 and is used to eject the formed parts. A pouring mechanism 6 is installed on the workbench 1 and is used to transport the alloy solution in the melting furnace 2 to the fixed mold base 3 and the movable mold base 4. A blower mechanism 8 is connected to the pouring mechanism 6 and is used to blow air when the ejection mechanism 7 is working to assist the ejection mechanism 7 in ejecting the parts from the fixed mold base 3. A sealing switching mechanism 9 is connected to the drive mechanism 5 and is used to switch the operation of the pouring mechanism 6 and the blower mechanism 8.

[0033] During operation, the worker first pours the alloy solution into the melting furnace 2 and uses the heat preservation tank 12 to keep the entire melting furnace 2 at a constant temperature. Then, the drive mechanism 5 starts and drives the moving mold base 4 to move smoothly, so that the moving mold base 4 and the fixed mold base 3 on the worktable 1 can be precisely fitted to complete the mold closing. During the mold closing process, the sealing switching mechanism 9 works simultaneously, so that the passage of the blower mechanism 8 is closed and the passage of the pouring mechanism 6 is opened, so that the entire equipment is switched to the pouring working state. Then, the pouring mechanism 6 starts and delivers the alloy solution with constant temperature and pressure inside the melting furnace 2 to the mold cavity formed by the fixed mold base 3 and the moving mold base 4, so as to complete the low-pressure and stable filling. After the alloy solution has completely cooled and solidified, the drive mechanism 5 drives the moving mold base 4 to move and separate from the fixed mold base 3. At this time, the sealing switching mechanism 9 is activated again, which closes the passage of the pouring mechanism 6 and opens the passage of the blower mechanism 8, so that the whole equipment is switched to the blowing state. Then the ejection mechanism 7 is activated to eject the molded part. At the same time, the blower mechanism 8 is activated synchronously. During the entire process of ejecting the workpiece by the ejection mechanism 7, air is continuously blown into the mold cavity and the workpiece contact position. Through synchronous blowing, the vacuum negative pressure adsorption force inside the cavity can be quickly broken, effectively reducing the demolding resistance between the workpiece and the mold cavity, and preventing damage to the surface when the part is ejected.

[0034] Reference Figure 2 The smelting furnace 2 includes a furnace body 21 and a sealing cover 22.

[0035] The furnace body 21 is fixedly installed inside the insulation tank 12 and is used to store the alloy solution. The sealing cover 22 is fixedly installed on the top of the furnace body 21 by bolts to form a complete melting furnace 2. The inlet of the furnace body 21 is connected to the inlet pipe 23, which passes through the insulation tank 12 and the furnace body 21. A control valve 24 is provided on the outside of the inlet pipe 23 to control the opening and closing of the inlet pipe 23, so as to facilitate the delivery of the alloy solution to the furnace body 21 for storage through the inlet pipe 23. The control valve 24 is a conventional technical means and will not be described in detail here.

[0036] Reference Figure 2 The ejection mechanism 7 includes a placement platform 71, which is fixedly installed on the worktable 1. A drive frame 13 is fixedly installed on the placement platform 71, and a drive mechanism 5 is installed on the drive frame 13.

[0037] Reference Figure 1 as well as Figure 3 The drive mechanism 5 includes a connecting frame 51, a hydraulic cylinder 52, and a first limit telescopic column 53.

[0038] The connecting frame 51 is fixedly mounted on the moving mold base 4, and the hydraulic cylinder 52 is fixedly mounted on the drive frame 13. The output end of the hydraulic cylinder 52 is fixedly connected to the side of the connecting frame 51 away from the moving mold base 4. One end of the first limiting telescopic column 53 is fixedly mounted on the side of the drive frame 13 near the moving mold base 4, and the other end of the first limiting telescopic column 53 is fixedly mounted on the side of the connecting frame 51 near the drive frame 13. The first limiting telescopic column 53 is used to limit and guide the moving mold base 4 when it is raised and lowered, so that the moving mold base 4 and the fixed mold base 3 are more stable when they are closed. The fixed mold base 3 is mounted on the top of the placement platform 71 by bolts.

[0039] During operation, the fixed mold base 3 is first fixedly installed on the placement platform 71 with bolts. Then, the hydraulic cylinder 52 is activated to drive the connecting frame 51 to descend. When the connecting frame 51 descends, it drives the moving mold base 4 to move downward in sync. At the same time as the moving mold base 4 moves downward, the first limit telescopic column 53 extends and retracts to guide it, making the moving mold base 4 move more smoothly. This allows the moving mold base 4 to accurately fit with the fixed mold base 3 to complete the mold closing.

[0040] Reference Figure 2 , Figure 4 as well as Figure 5 The casting mechanism 6 includes a gas supply pipe 61, a fixed base 62, a gas pump 63, a suction pipe 64, a liquid riser pipe 65, a suspension disc 66, and a scraping assembly 67. The scraping assembly 67 includes a support rod 671 and a scraping ring 672.

[0041] A fixed base 62 is fixedly installed on a placement platform 71, and a gas pump 63 is fixedly installed on the fixed base 62. A suction pipe 64 is connected to the inlet of the gas pump 63, and the inlet of the gas pipe 61 is connected to the outlet of the gas pump 63. The gas pipe 61 passes through a sealing cap 22, and its outlet is inserted into the furnace body 21. A riser pipe 65 passes through a sealing cap 22, and its inlet is inserted into the furnace body 21. The moving mold base 4 has a pouring port 41 for the alloy solution to enter. The outlet of the riser pipe 65 is inserted into the pouring port 41 to facilitate the delivery of the alloy solution between the moving mold base 4 and the fixed mold base 3.

[0042] The suspension disc 66 is slidably sleeved on the outside of the riser pipe 65. The surface of the riser pipe 65 has a threaded groove 68, and the scraping ring 672 is threadedly connected to the threaded groove 68. The outer ring of the scraping ring 672 abuts against the inner wall of the furnace body 21 to scrape off and collect the solution adhering to the inner wall of the furnace body 21. A circular groove 673 is formed on the side of the scraping ring 672 near the suspension disc 66, and a support rod 671 is fixedly installed on the side of the suspension disc 66 near the scraping ring 672. The support rod 671 is rotatably installed in the circular groove 673. A collection groove 69 is provided on the side of the suspension disc 66 near the scraping ring 672 to collect the solution scraped off by the scraping ring 672.

[0043] During operation, after the mold closing is completed, the sealing switching mechanism 9 closes the passage of the blower mechanism 8 and opens the passage of the casting mechanism 6, so that the entire equipment switches to the casting working state. Then, the air pump 63 is started to draw in outside air through the air extraction pipe 64 and compress it. The compressed air is sent into the melting furnace 2 through the air supply pipe 61, which increases the air pressure in the melting furnace 2, thereby squeezing the suspension plate 66 downward. When the suspension plate 66 descends, it squeezes the alloy solution into the riser pipe 65, and then transports the alloy solution from the pouring port 41 to the cavity between the fixed mold base 3 and the moving mold base 4 through the riser pipe 65. Simultaneously, as the suspension disc 66 descends, it causes the scraping ring 672 to move downwards in sync. Since the scraping ring 672 is threadedly connected to the threaded groove 68 on the surface of the riser pipe 65, it rotates as it descends. At this time, because the scraping ring 672 abuts against the inner wall of the melting furnace 2, it scrapes off the solution adhering to the inner wall of the melting furnace 2. The scraped-off solution then flows into the collection tank 69 of the suspension disc 66 for centralized collection. Once the collection tank 69 is full, the sealing cover 22 is removed from the furnace body 21 by tightening the bolts, making it easy to remove the suspension disc 66 from the furnace body 21 for processing the solution collected in the collection tank 69.

[0044] Reference Figure 6 The ejection mechanism 7 also includes a support base 72, a dual-axis motor 73, a threaded rod 74, a drive block 75, a drive rod 76, a lifting block 77, a guide plate 78, and a second limit telescopic column 79.

[0045] A support base 72 is fixedly mounted on the worktable 1, and a dual-axis motor 73 is fixedly mounted on the support base 72. A threaded rod 74 is rotatably mounted on the placement table 71, and the output end of the dual-axis motor 73 is fixedly connected to the end of the threaded rod 74 via a coupling. A drive block 75 is threadedly connected to the threaded rod 74, one end of a drive rod 76 is hinged to the drive block 75, and the other end of the drive rod 76 is hinged to the lifting block 77. One end of a guide plate 78 is fixedly mounted on the inner side of the placement table 71, and the other end of the guide plate 78 is fixedly mounted on the support base 72. The drive block 75 is slidably sleeved on the guide plate 78 to guide the movement of the drive block 75 when it moves.

[0046] Reference Figure 6 as well as Figure 7 The blower mechanism 8 includes a lifting rod 81, a lifting plate 82, and a blower tube 83.

[0047] A blower pipe 83 passes through the placement platform 71, and the air inlet of the blower pipe 83 is connected to the air supply pipe 61. A lifting rod 81 is slidably connected within the fixed mold base 3, and the end of the lifting rod 81 is fixedly mounted on the lifting plate 82. A lifting block 77 is fixedly mounted on the lifting plate 82. One end of the second limiting telescopic column 79 is fixedly mounted on the lifting plate 82, and the other end of the second limiting telescopic column 79 is fixedly mounted on the worktable 1 to provide limiting guidance when the lifting rod 81 ejects the part. An air supply chamber 84 is formed within the lifting plate 82, and the air outlet of the blower pipe 83 is connected to the air supply chamber 84. An air supply channel 85 is formed within the lifting rod 81, and the air supply channel 85 is connected to the air supply chamber 84 so that the air blown by the blower pipe 83 enters the air supply channel 85. The air supply channel 85 is provided with an exhaust port 86 for gas to be discharged so that the air blown by the air pipe 83 can be discharged through the exhaust port 86 and enter the fixed mold base 3. The exhaust port 86 is initially located inside the fixed mold base 3 and is blocked by the mold body. When the part is lifted, the lifting rod 81 will rise synchronously, thereby exposing the originally blocked exhaust port 86 and allowing air to be blown.

[0048] During operation, after the part is formed, the drive mechanism 5 starts to move the mold base 4 upward to open the mold. At this time, the sealing switching mechanism 9 switches synchronously, closing the passage of the pouring mechanism 6 and opening the passage of the blower mechanism 8. Then the air pump 63 continues to work, so that air enters the air supply chamber 84 in the lifting plate 82 through the air pipe 83, and then is ejected from the exhaust hole 86 through the air supply channel 85 in the lifting rod 81. Simultaneously, the dual-axis motor 73 starts driving the threaded rod 74 to rotate. As the threaded rod 74 rotates, it drives the threaded drive block 75 to move along the guide plate 78. Simultaneously, the drive block 75 drives the drive rod 76 to rotate. The rotation of the drive rod 76 pushes the lifting block 77 upwards. The lifting block 77 drives the lifting plate 82 and the lifting rod 81 to move upwards synchronously, smoothly ejecting the molded part from the fixed mold base 3. During ejection, the vent 86 exposes, delivering compressed air between the part and the cavity wall, thereby breaking the vacuum negative pressure adsorption force of the cavity and effectively reducing demolding resistance, thus preventing damage to the part surface during ejection. Furthermore, during part ejection, the second limiting telescopic column 79 extends and retracts synchronously with the lifting plate 82, limiting and guiding the ejection action to ensure greater stability during part ejection.

[0049] Reference Figure 1 as well as Figure 8 The sealing switching mechanism 9 includes a switching block 91, a switching rod 92, a first sealing ball 93, a second sealing ball 94, and a switching assembly 95. The switching assembly 95 includes a connecting block 951, an arc-shaped rod 952, a first connecting rod 953, a second connecting rod 954, and a hinge seat 955. The hinge seat 955 includes an arc-shaped plate 9551 and a hinge rod 9552.

[0050] An arc-shaped plate 9551 is fixedly mounted on a fixed base 62, and a hinge rod 9552 is fixedly mounted on the arc-shaped plate 9551. The arc-shaped rod 952 is rotatably mounted on the hinge rod 9552. Arc-shaped blocks 956 are hinged to both ends of the arc-shaped rod 952. One arc-shaped block 956 is fixedly mounted on a first connecting rod 953, and the other arc-shaped block 956 is fixedly mounted on a second connecting rod 954. The first connecting rod 953 is fixedly mounted on a first sealing ball 93, and the second connecting rod 954 is fixedly mounted on a second sealing ball 94. The first connecting rod 953 passes through an air supply pipe 61, and the first sealing ball 93 is slidably mounted in the air supply pipe 61 to seal it. The second connecting rod 954 passes through a blower pipe 83, and the second sealing ball 94 is slidably mounted in the blower pipe 83 to seal it. The connecting block 951 is fixedly mounted on the arc-shaped rod 952. One end of the switching rod 92 is fixedly mounted on the switching block 91, and the other end of the switching rod 92 is fixedly mounted on the connecting block 951. The switching block 91 is fixedly mounted on the connecting frame 51.

[0051] During the mold closing stage, the hydraulic cylinder 52 pushes the connecting frame 51 down, and the connecting frame 51 drives the moving mold base 4 to move down synchronously. At the same time, it drives the switching block 91 fixed on the connecting frame 51 to move down synchronously. When the switching block 91 descends, it drives the connecting block 951 to move down through the switching rod 92. The connecting block 951 drives the arc rod 952 to rotate around the hinge rod 9552. At this time, one end of the arc rod 952 connected to the first connecting rod 953 descends, and the other end of the arc rod 952 connected to the second connecting rod 954 rises. On the one hand, the first connecting rod 953 pulls the first sealing ball 93 to move in the air supply pipe 61, opening the passage of the air supply pipe 61. On the other hand, the second connecting rod 954 pushes the second sealing ball 94 to move in the air blowing pipe 83, closing the passage of the air blowing pipe 83. This connects the air passage of the casting mechanism 6 and cuts off the air passage of the blower mechanism 8, and the equipment enters the casting working state.

[0052] During the mold opening stage, the hydraulic cylinder 52 drives the connecting frame 51 to rise, and the connecting frame 51 drives the moving mold base 4 to move upward synchronously. At the same time, it drives the switching block 91 fixed on the connecting frame 51 to move upward synchronously. When the switching block 91 rises, it drives the connecting block 951 to move upward through the switching rod 92. At this time, it drives the arc rod 952 to rotate in the opposite direction, so that one end of the arc rod 952 connected to the first connecting rod 953 rises and the other end of the arc rod 952 connected to the second connecting rod 954 falls. On the one hand, the first connecting rod 953 pulls the first sealing ball 93 to seal the air supply pipe 61. On the other hand, the second connecting rod 954 pulls the second sealing ball 94 to move upward and open the air blowing pipe 83, thereby closing the air passage of the casting mechanism 6 and opening the air passage of the blower mechanism 8. The equipment switches to the blower-assisted demolding state.

[0053] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A low-pressure casting equipment for zinc alloy handles, comprising a worktable (1), a melting furnace (2) for storing alloy solution, a fixed mold base (3) mounted on the worktable (1), a movable mold base (4) for cooperating with the fixed mold base (3) to form parts from the alloy solution, a drive mechanism (5) for driving the movable mold base (4) to move, an ejection mechanism (7) for ejecting the formed parts from the fixed mold base (3), and a pouring mechanism (6) for conveying the alloy solution in the melting furnace (2) to the fixed mold base (3) and the movable mold base (4), characterized in that, It also includes a blower mechanism (8) connected to the casting mechanism (6) and used to blow air when the ejection mechanism (7) is working, and a sealing switching mechanism (9) for switching the casting mechanism (6) and the blower mechanism (8) to work. The casting mechanism (6) includes a gas supply pipe (61) for supplying gas to the smelting furnace (2); the blower mechanism (8) includes a blower pipe (83) connected to the gas supply pipe (61) and used for blowing air when the ejector mechanism (7) is in operation. The sealing switching mechanism (9) includes a switching block (91) mounted on the drive mechanism (5), a switching rod (92) mounted on the switching block (91), a first sealing ball (93) for sealing the air supply pipe (61), a second sealing ball (94) for sealing the blower pipe (83), and a switching assembly (95); the switching assembly (95) is used to drive the first sealing ball (93) and the second sealing ball (94) to work synchronously and perform opposite sealing actions.

2. The low-pressure casting equipment for zinc alloy handles according to claim 1, characterized in that, The switching assembly (95) includes a connecting block (951) installed at the other end of the switching rod (92), an arc-shaped rod (952) installed on the connecting block (951), a first connecting rod (953) hinged to one end of the arc-shaped rod (952) and connected to the first sealing ball (93), a second connecting rod (954) hinged to the other end of the arc-shaped rod (952) and connected to the second sealing ball (94), and a hinge seat (955). The first connecting rod (953) passes through the air supply pipe (61), and the second connecting rod (954) passes through the air blowing pipe (83) so that the first sealing ball (93) and the second sealing ball (94) are more stable when rising and falling; the hinge seat (955) is installed on the casting mechanism (6) and is rotatably connected to the arc rod (952).

3. The low-pressure casting equipment for zinc alloy handles according to claim 1, characterized in that, The blower mechanism (8) further includes a lifting rod (81) slidably mounted in the fixed mold base (3) and a lifting plate (82) mounted on the lifting rod (81) and connected to the ejection mechanism (7). The lifting plate (82) has an air supply chamber (84) inside, and the air outlet of the blowing pipe (83) is connected to the air supply chamber (84); the lifting rod (81) has an air supply channel (85) inside, and the air supply channel (85) is connected to the air supply chamber (84) so ​​that the air blown by the blowing pipe (83) enters the air supply channel (85); The air supply channel (85) is provided with an exhaust hole (86) for gas discharge so that the air blown by the air pipe (83) can be discharged through the exhaust hole (86) and enter the mold base (3).

4. The low-pressure casting equipment for zinc alloy handles according to claim 1, characterized in that, The casting mechanism (6) also includes a fixed seat (62) installed on the workbench (1), an air pump (63) installed on the fixed seat (62), an air extraction pipe (64) connected to the air pump (63) for extracting external air, a riser pipe (65) installed in the melting furnace (2) for conveying the alloy solution, a suspension disc (66) slidably sleeved on the outside of the riser pipe (65) for extruding and conveying the alloy solution, and a scraping assembly (67). The scraping assembly (67) is rotatably mounted on the suspension disc (66) to scrape off and collect the solution adhering to the side wall of the smelting furnace (2).

5. The low-pressure casting equipment for zinc alloy handles according to claim 4, characterized in that, The scraping assembly (67) includes a support rod (671) mounted on the suspension disk (66) and a scraping ring (672) rotatably mounted on the support rod (671) and in contact with the inner wall of the smelting furnace (2). The surface of the riser tube (65) is provided with a threaded groove (68), and the scraper ring (672) is threadedly connected to the threaded groove (68). The scraper ring (672) is provided with an annular groove (673) on the side near the suspension disk (66), and the support rod (671) is rotatably installed in the annular groove (673). The side of the suspension disk (66) away from the alloy solution has a collection groove (69) to facilitate the collection of the solution scraped off by the scraper ring (672).

6. The low-pressure casting equipment for zinc alloy handles according to claim 3, characterized in that, The ejection mechanism (7) is mounted on the worktable (1). The ejection mechanism (7) includes a placement platform (71) mounted on the worktable (1), a threaded rod (74) rotatably mounted on the placement platform (71), a drive block (75) threadedly connected to the threaded rod (74), a lifting block (77) mounted on the lifting plate (82), a drive rod (76) hinged between the lifting block (77) and the drive block (75), and a dual-axis motor (73) mounted on the worktable (1) for driving the threaded rod (74) to rotate. The fixed mold base (3) is detachably mounted on the placement platform (71).

7. The low-pressure casting equipment for zinc alloy handles according to claim 6, characterized in that, A drive frame (13) is fixedly installed on the placement platform (71), and the drive mechanism (5) is installed on the drive frame (13); The drive mechanism (5) includes a connecting frame (51) mounted on the moving mold base (4), a hydraulic cylinder (52) mounted on the drive frame (13) for driving the connecting frame (51) to move up and down, and a first limiting telescopic column (53) mounted between the drive frame (13) and the connecting frame (51); the first limiting telescopic column (53) is used to limit and guide the moving mold base (4) to move more stably when the connecting frame (51) moves up and down.

8. The low-pressure casting equipment for zinc alloy handles according to claim 5, characterized in that, A placement rack (11) is installed on the workbench (1), and a heat preservation tank (12) is installed on the placement rack (11). The smelting furnace (2) is installed inside the heat preservation tank (12) to keep the alloy solution inside the smelting furnace (2) warm. The smelting furnace (2) includes a furnace body (21) for storing alloy solution and a sealing cover (22) removably mounted on the furnace body (21) to facilitate the removal of the suspension disc (66) from the furnace body (21).

9. A low-pressure casting equipment for zinc alloy handles according to claim 8, characterized in that, The riser pipe (65) passes through the sealing cap (22) and the inlet is inserted into the furnace body (21). The moving mold base (4) has a pouring port (41) for the alloy solution to enter. The outlet of the riser pipe (65) is inserted into the pouring port (41). The inlet of the furnace body (21) is connected to an inlet pipe (23), the inlet pipe (23) passes through the heat preservation tank (12), and a control valve (24) is provided on the outside of the inlet pipe (23) to control the opening and closing of the inlet pipe (23).

10. A low-pressure casting equipment for zinc alloy handles according to claim 6, characterized in that, A second limiting telescopic column (79) is installed between the workbench (1) and the lifting plate (82). The second limiting telescopic column (79) is used to limit and guide the movement of the lifting plate (82) when the lifting plate (82) is raised or lowered. A support base (72) is installed on the workbench (1), and the dual-axis motor (73) is installed on the support base (72). A guide plate (78) is installed between the support base (72) and the placement platform (71). The drive block (75) is slidably sleeved on the guide plate (78) so as to limit and guide the movement of the drive block (75).

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