Vacuum low-pressure anti-gravity casting equipment and process in precision casting of copper handicrafts

Abstract

The invention discloses vacuum low-pressure anti-gravity casting equipment and a vacuum low-pressure anti-gravity casting process in copper handicraft precision casting, and relates to the technical field of copper handicraft casting. The invention discloses vacuum low-pressure anti-gravity casting equipment and process in copper handicraft precision casting. The vacuum low-pressure anti-gravity casting equipment comprises an outer frame mechanism which comprises a base; a casting bin assembly is arranged on the base and comprises a smelting mechanism used for smelting and a pouring mechanism used for pouring. The pouring mechanism comprises a pouring bin, a top cover is mounted on the upper wall of the pouring bin, and a bin opening penetrates through the lower wall of the pouring bin; an adjusting groove is formed in the side wall of the pouring bin in a penetrating mode. A lifting mechanism is movably arranged on the pouring mechanism and comprises a lifting ring located in the pouring bin, the two sides of the lifting ring are fixedly connected with connecting columns penetrating through the adjusting grooves in a matched mode, and the outer ends of the connecting columns are fixedly connected with outer plates; according to the vacuum low-pressure anti-gravity casting equipment and process in copper handicraft precision casting, the copper handicraft machining efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of copper handicraft casting, in particular to vacuum low-pressure counter-gravity casting equipment and a process for copper handicraft precision casting. Background Art

[0002] Copper crafts refer to copper crafts. Copper crafts include bronzeware. Handicraft products are products made by hand from raw materials or semi-finished products and are a general term for a group of valuable artworks.

[0003] The patent with publication number CN119304164A discloses a counter-gravity casting equipment for complex structure high-temperature alloy precision castings, including a vacuum unit, a melting system, a melting chamber, a pouring chamber, a mold lifting mechanism, a control system, a transfer system and an air source system; the vacuum unit is respectively connected to the melting chamber and the pouring chamber and is used to evacuate the melting chamber and the pouring chamber; the melting system is arranged in the melting chamber and is used for melting high-temperature alloys; the pouring chamber is installed on the top of the melting chamber and is communicated with each other; the mold lifting mechanism is installed in the pouring chamber and is used to vertically lift the mold before and after pouring; the transfer system is installed above the pouring chamber and is used to transfer the mold and the liquid riser; the air source system is respectively connected to the melting chamber and the pouring chamber and is used to fill the melting chamber and the pouring chamber with gas during the pouring process, and the control system controls the opening and closing of the vacuum unit, the mold lifting mechanism, the transfer system and the air source system respectively. When the control system detects that the casting has completed solidification and cooled to a suitable temperature, the top door of the pouring chamber is opened, the high-temperature alloy casting is taken out, and the counter-gravity casting of the casting is completed.

[0004] The casting cavity in the pouring chamber of the equipment in the above technical solution is single, and it is impossible to process a variety of copper crafts. In other words, if copper crafts of different shapes need to be processed, the pouring chamber needs to be replaced, which makes the pouring operation too cumbersome. At the same time, the fixed pouring chamber needs to be taken out after the copper craft is completely formed. The space and time occupied during this period delay the pouring of the next copper craft, which slows down the processing efficiency of the equipment. Therefore, there is an urgent need for vacuum low-pressure anti-gravity casting equipment and process in the precision casting of copper crafts to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a vacuum low-pressure counter-gravity casting device and process for precision casting of copper handicrafts to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a vacuum low-pressure counter-gravity casting device for precision casting of copper handicrafts, comprising an external frame mechanism, wherein the external frame mechanism comprises a base;

[0007] A casting chamber assembly is provided on the base, and the casting chamber assembly includes a smelting mechanism for smelting and a pouring mechanism for pouring;

[0008] The pouring mechanism includes a pouring bin, the upper wall of which is provided with a top cover, and the lower wall of which is provided with a bin opening;

[0009] An adjustment groove is provided through the side wall of the casting bin;

[0010] The pouring mechanism is movably provided with a lifting mechanism, which includes a lifting ring located inside the pouring bin, and both sides of the lifting ring are fixedly connected with connecting columns adapted to be inserted into the adjustment groove, and the outer ends of the connecting columns are fixedly connected with outer plates;

[0011] The lifting mechanism is sleeved with a casting mechanism, and the casting mechanism includes a casting that is adapted to be inserted into a lifting ring. The upper outer side of the casting is fixedly sleeved with a retaining ring corresponding to the overlapping lifting ring. The lower outer side of the casting is provided with a hook groove, and the lower surface of the casting is provided with a connecting groove. A straw assembly is installed below the casting through the connecting groove.

[0012] As a preferred technical solution of the present invention, an outer frame is fixed on the upper side of the base, and cylinders are fixedly connected to the lower sides of the two ends of the crossbeam of the outer frame, and the output end of each cylinder is fixedly connected to a cylinder plate corresponding to the outer plate.

[0013] As a preferred technical solution of the present invention, second insertion holes are provided through the outer edges of the upper and lower walls of the casting bin.

[0014] As a preferred technical solution of the present invention, the four sides of the upper inner end of the casting bin are fixedly connected with a centrally symmetrical inclined platform, and the inclined platform is tilted toward one side inward;

[0015] A through slot corresponding to the adjusting slot is formed on the surface of the inclined platform.

[0016] As a preferred technical solution of the present invention, a baffle that fits the casting bin is fixedly sleeved on the connecting column, the baffle is sealed and shielded on the outside of the adjustment groove, and the end of the baffle is correspondingly plugged into the second socket.

[0017] As a preferred technical solution of the present invention, the outer edges of the lower ports of the lifting ring are respectively fixedly embedded with torsion spring shafts, and each of the torsion spring shafts is movably mounted with a clip assembly;

[0018] Each of the clip components includes a sleeve movably sleeved on a torsion spring shaft, a hook adapted to a hook slot is fixedly connected to the lower side of the sleeve, and a shift plate is fixedly connected to the upper side of the sleeve;

[0019] The end of the shift plate corresponds to the inward side of the ramp.

[0020] As a preferred technical solution of the present invention, the straw assembly includes a straw fixedly connected to the casting mold, the middle portion of the straw is expanded outward, and the upper end of the straw is fixedly sleeved with a receiving plate adapted to fit into the connecting groove.

[0021] As a preferred technical solution of the present invention, the smelting mechanism includes a smelting chamber fixedly connected to the base, and a partition is fixedly connected to the interior of the smelting chamber, and the partition divides the interior of the smelting chamber into a smelting space and a parts space;

[0022] The upper surface of the smelting bin is fixedly connected to the casting bin;

[0023] A through hole is provided in the middle of the upper surface of the smelting bin, which is adapted to receive the lower port of the straw;

[0024] The upper wall of the smelting bin is provided with a first socket connected to the second socket;

[0025] The lower inner wall of the smelting bin is provided with a bottom groove;

[0026] A turntable corresponding to the bottom groove is movably embedded on the surface of the partition, a first driving wheel is fixedly mounted on the upper surface of the turntable, and a second driving wheel corresponding to the first driving wheel is fixedly mounted on the upper surface of the partition;

[0027] A switching assembly is provided in the parts space, and the switching assembly includes a motor fixedly embedded in the upper inner wall of the smelting chamber, an output end of the motor is fixedly connected to a connecting plate, one end of the connecting plate is fixedly connected to a sealing cover, and an upper surface of the sealing cover is fixedly connected to a sealing gasket that fits against the upper wall of the smelting chamber;

[0028] The other end of the connecting plate is fixedly connected to a pipe disc that fits against the upper wall of the smelting bin. A liquid pipe corresponding to the bottom trough is inserted through the middle of the pipe disc. The upper end of the liquid pipe is sealed and fits with the port of the suction pipe. The lower end of the liquid pipe is open and has a notch. A first guide hole and a second guide hole are formed through the upper side of the liquid pipe, and the first guide hole is above the second guide hole.

[0029] A connecting plate is fixedly connected between the sealing cover and the tube disc.

[0030] The process of vacuum low-pressure anti-gravity casting equipment in copper handicraft precision casting is as follows:

[0031] S1: Open the top cover, insert the casting mechanism into the lifting ring, and fix it with the clip assembly;

[0032] S2: The inside of the pouring mechanism is vacuumed by a vacuum pump, and then the inside of the mold is vacuumed by the suction pipe assembly, and then the lifting mechanism is moved downward to insert the suction pipe assembly into the through hole;

[0033] S3: After the copper liquid in the smelting space is smelted to the required standard, the air pressure inside the smelting mechanism is reduced by a vacuum pump, and the motor is started to swap the sealing cover and the pipe tray so that the liquid pipe is facing the suction pipe;

[0034] S4: After the liquid pipe is in place, it rises under the joint action of the first driving wheel and the second driving wheel and is inserted into the middle outer expansion part of the suction pipe, guiding the copper liquid in the smelting space into the casting mold through the first guide hole;

[0035] S5: Continue to control the liquid pipe to move upward so that the upper end of the liquid pipe is flush with the upper end of the suction pipe and blocks the upper end of the suction pipe. The excess copper liquid falls back into the smelting space through the second guide hole under the action of gravity.

[0036] S6: After the copper liquid inside the mold is initially formed, the blocked liquid pipe in the straw is removed to ventilate the inside of the mold. At the same time, the lifting mechanism is moved upward to release the fixation of the mold mechanism, and the mold mechanism is removed for cooling separately.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] (1) Vacuum low-pressure anti-gravity casting equipment and process for precision casting of copper crafts. Through the setting of the casting mechanism, the external shape of the casting mechanism is consistent and compatible with the lifting mechanism, and the internal shape of the casting mechanism can be designed into a variety of shapes, so that a variety of copper crafts can be processed on the same equipment. In addition, after the copper craft in the casting mold is basically formed, the casting mechanism can be taken out and the final shaping can be carried out outside. After taking it out, the equipment can be used to process the next copper craft, thereby improving the efficiency of copper craft processing.

[0039] (2) Vacuum low-pressure anti-gravity casting equipment and process in the precision casting of copper handicrafts. When the hook corresponds to the hook groove opened on the outside of the mold, it is turned inward with the torsion spring shaft as the axis, so that the hook is locked in the hook groove, completing the buckle limit of the up and down displacement of the mold, so that the mold can be quickly and stably loaded into the lifting mechanism in the casting bin, improving the efficiency of work assembly.

[0040] (3) Vacuum low-pressure anti-gravity casting equipment and process for precision casting of copper handicrafts. By setting the through grooves on the four sides of the upper port of the casting bin, the outer end of the paddle of the clamp assembly slides along the inclined inner wall of the ramp, and then turns inward with the torsion spring axis as the axis during the contact with the ramp, so that the clamp limit of the hook groove is automatically released during the process of moving the casting mechanism up and out. When the casting mechanism moves up to the exit, it can be taken out by itself, and the removal and unlocking are automatic.

[0041] (4) Vacuum low-pressure anti-gravity casting equipment and process in the precision casting of copper handicrafts. The radius of the middle part of the straw is increased, and the radius at both ends is the same. It is connected to the bottom of the mold in a detachable manner. By replacing the straws with different middle radii, the filling speed can be adjusted according to the actual situation, thereby improving the adjustable performance.

[0042] (5) Vacuum low-pressure anti-gravity casting equipment and process in precision casting of copper handicrafts. The vacuum is first extracted from the casting bin through an external vacuum pump, and then connected to the casting mold through a suction pipe to keep the interior of the casting bin in a synchronous vacuum state. The negative pressure state in the casting bin allows the sealing cover to completely seal the through hole, thereby improving the sealing performance.

[0043] (6) The vacuum low-pressure counter-gravity casting equipment and process in the precision casting of copper handicrafts are to start the first driving wheel and the second driving wheel on both sides simultaneously, so that the liquid pipe rises and is inserted into the middle position of the suction pipe. The liquid pipe is adapted to the end of the suction pipe. Therefore, under the action of negative pressure, the copper liquid in the smelting space enters the mold along the liquid pipe and the suction pipe to improve the accuracy of the counter-gravity casting.

[0044] (7) The vacuum low-pressure counter-gravity casting equipment and process in the precision casting of copper handicrafts is to insert the upper end of the liquid tube flush with the upper end of the straw to complete the sealing of the mold, forming a seamless nested seal to prevent the outside air from invading the mold during the solidification stage. The mold after the liquid tube is sealed can maintain its vacuum for a long time. Compared with the open solidification environment of traditional gravity casting, the copper liquid oxidation inclusion defect rate is reduced.

[0045] (8) Vacuum low-pressure anti-gravity casting equipment and process in precision casting of copper handicrafts. Through pressure compensation, the residual copper liquid in the liquid pipe is directed back to the smelting space under the action of pressure difference, avoiding waste and pollution of copper liquid and saving costs.

[0046] (9) Vacuum low-pressure anti-gravity casting equipment and process for precision casting of copper crafts: first, the liquid pipe is moved back to its position by the first drive wheel and the second drive wheel. If the negative pressure in the mold is strong at this time, the suction pipe and the liquid pipe can be assisted by an external cylinder to separate. At this time, the copper crafts formed in the mold are connected to the outside world at the suction pipe, avoiding the vacuum adsorption resistance during demolding of the traditional closed cavity and improving the demolding efficiency.

[0047] (10) Vacuum low-pressure anti-gravity casting equipment and process in the precision casting of copper handicrafts. For parts with complex patterns, the outside air entering the mold can effectively lubricate the mold surface, so that the surface of the casting can be completely peeled off, the clarity of the pattern is improved, and the demoulding quality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a structural schematic diagram of the present invention;

[0049] Figure 2 This is a schematic diagram of the external frame mechanism of the present invention;

[0050] Figure 3 This is a schematic diagram of the smelting mechanism of the present invention;

[0051] Figure 4 This is a schematic diagram of the interior of the smelting mechanism of the present invention;

[0052] Figure 5 Schematic diagram of the separator of the present invention;

[0053] Figure 6 A schematic diagram of a switching component of the present invention;

[0054] Figure 7 This is a schematic diagram of the liquid pipe of the present invention;

[0055] Figure 8 This is a schematic diagram of the pouring mechanism of the present invention;

[0056] Figure 9 This is a schematic diagram of the interior of the pouring mechanism of the present invention;

[0057] Figure 10 This is a schematic diagram of the lifting mechanism of the present invention;

[0058] Figure 11 This is a schematic diagram of a connecting column according to the present invention;

[0059] Figure 12 This is a schematic diagram of the connection of the lifting mechanism of the present invention;

[0060] Figure 13 This is a schematic diagram of the buckle and clip assembly of the present invention;

[0061] Figure 14 Schematic diagram of the casting mechanism of the present invention;

[0062] Figure 15 It is a bottom view schematic diagram of the casting mechanism of the present invention;

[0063] Figure 16 This is a schematic diagram of the docking of the clip assembly of the present invention;

[0064] Figure 17 This is a schematic diagram of the liquid pipe diversion of the present invention;

[0065] Figure 18 Schematic diagram of liquid pipe blocking according to the present invention.

[0066] In the figure: 1. External frame mechanism; 101. Base; 102. External frame; 103. Cylinder; 104. Cylinder plate; 2. Smelting mechanism; 201. Smelting chamber; 202. Partition plate; 203. Through hole; 204. First insertion hole; 205. Bottom groove; 206. Turntable; 207. First driving wheel; 208. Second driving wheel; 209. Motor; 210. Connecting plate; 211. Sealing cover; 212. Sealing gasket; 213. Pipe plate; 214. Connecting plate; 215. Liquid pipe; 216. Notch; 217. First guide hole; 218 , second guide hole; 3. casting mechanism; 301. casting bin; 302. top cover; 303. bin mouth; 304. second insertion hole; 305. adjustment groove; 306. inclined platform; 307. through groove; 4. lifting mechanism; 401. lifting ring; 402. connecting column; 403. outer plate; 404. baffle; 405. torsion spring shaft; 406. sleeve; 407. hook; 408. dial plate; 5. casting mechanism; 501. casting mold; 502. baffle ring; 503. hook groove; 504. connecting groove; 505. suction pipe; 506. connecting plate. DETAILED DESCRIPTION

[0067] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0068] Example: See Figure 1 、 Figure 2 、 Figure 8 、 Figure 10 、 Figure 11 、 Figure 14 、 Figure 16 , vacuum low-pressure anti-gravity casting equipment in copper handicraft precision casting, including an outer frame mechanism 1, the outer frame mechanism 1 includes a base 101;

[0069] A casting chamber assembly is provided on the base 101, and the casting chamber assembly includes a smelting mechanism 2 for smelting and a pouring mechanism 3 for pouring;

[0070] The pouring mechanism 3 includes a pouring bin 301, a top cover 302 is installed on the upper wall of the pouring bin 301, and a bin opening 303 is opened through the lower wall of the pouring bin 301;

[0071] An adjustment groove 305 is provided through the side wall of the casting bin 301;

[0072] A lifting mechanism 4 is movably provided on the pouring mechanism 3. The lifting mechanism 4 includes a lifting ring 401 located inside the pouring bin 301. Connecting columns 402 adapted to be inserted into the adjustment slots 305 are fixedly connected on both sides of the lifting ring 401. The outer ends of the connecting columns 402 are fixedly connected to outer plates 403.

[0073] The lifting mechanism 4 is provided with a casting mechanism 5, which includes a casting mold 501 adapted to be inserted into the lifting ring 401. The interior of the casting mold 501 can be processed into various copper handicraft models. The upper outer side of the casting mold 501 is fixedly sleeved with a retaining ring 502 corresponding to the overlapping lifting ring 401. The lower outer side of the casting mold 501 is provided with a hook groove 503, and the lower surface of the casting mold 501 is provided with a connecting groove 504. A straw assembly is installed below the casting mold 501 through the connecting groove 504.

[0074] See also Figure 2 The upper side of the base 101 is fixed with an outer frame 102, and the lower sides of the two ends of the beam of the outer frame 102 are fixedly connected with cylinders 103 respectively. The output end of each cylinder 103 is fixedly connected to a cylinder plate 104 corresponding to the outer plate 403.

[0075] See also Figure 8 The upper and lower walls of the casting bin 301 are both provided with second insertion holes 304 .

[0076] See also Figure 9 、 Figure 16 , the four sides of the upper end of the casting bin 301 are fixedly connected with a centrally symmetrical inclined platform 306, the inclined platform 306 is tilted toward one side inward, and the width of the inclined platform 306 gradually narrows from top to bottom;

[0077] A through slot 307 corresponding to the adjustment slot 305 is formed on the surface of the inclined platform 306 .

[0078] See also Figure 11 、 Figure 12 A baffle 404 that fits the casting bin 301 is fixedly sleeved on the connecting column 402 , and the baffle 404 is sealed and shielded on the outside of the adjustment groove 305 , and the end of the baffle 404 is correspondingly plugged into the second socket 304 .

[0079] See also Figure 11 、 Figure 16 , the outer edges of the lower ports of the lifting ring 401 are respectively fixedly embedded with torsion spring shafts 405, and each torsion spring shaft 405 is movably mounted with a clip assembly;

[0080] Each clip assembly includes a sleeve 406 that is movably sleeved on a torsion spring shaft 405 , a hook 407 that fits into a hook slot 503 is fixedly connected to the lower side of the sleeve 406 , and a shift plate 408 is fixedly connected to the upper side of the sleeve 406 ;

[0081] The end of the shift plate 408 corresponds to the inward side of the ramp 306 .

[0082] See also Figure 15 The straw assembly includes a straw 505 fixedly connected to the mold 501 , the middle portion of the straw 505 is expanded outward, and the upper end of the straw 505 is fixedly sleeved with a receiving plate 506 that fits into the connecting groove 504 .

[0083] See also Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 17 、 Figure 18 The smelting mechanism 2 includes a smelting chamber 201 fixedly connected to the base 101. A partition 202 is fixedly connected to the interior of the smelting chamber 201. The partition 202 divides the interior of the smelting chamber 201 into a smelting space and a parts space.

[0084] The upper surface of the smelting chamber 201 is fixedly connected to the casting chamber 301;

[0085] A through hole 203 is provided in the middle of the upper surface of the smelting chamber 201 to accommodate the lower end of the suction pipe 505;

[0086] The upper wall of the smelting chamber 201 is provided with a first socket 204 which is connected to the second socket 304;

[0087] The lower inner wall of the smelting chamber 201 is provided with a bottom groove 205;

[0088] A rotating disc 206 corresponding to the bottom groove 205 is movably engaged on the surface of the partition 202. A first driving wheel 207 is fixedly mounted on the upper surface of the rotating disc 206. A second driving wheel 208 corresponding to the first driving wheel 207 is fixedly mounted on the upper surface of the partition 202.

[0089] A switching assembly is provided in the parts space. The switching assembly includes a motor 209 fixedly embedded in the upper inner wall of the smelting chamber 201. The output end of the motor 209 is fixedly connected to a connecting plate 210. One end of the connecting plate 210 is fixedly connected to a sealing cover 211. The upper surface of the sealing cover 211 is fixedly connected to a sealing gasket 212 that fits against the upper wall of the smelting chamber 201.

[0090] The other end of the connecting plate 210 is fixedly connected to a pipe disc 213 that is attached to the upper wall of the smelting chamber 201. A liquid pipe 215 corresponding to the bottom trough 205 is inserted through the middle of the pipe disc 213. The upper end of the liquid pipe 215 is sealed and adapted to the end of the suction pipe 505. The lower end of the liquid pipe 215 is open and has a notch 216. A first guide hole 217 and a second guide hole 218 are formed through the upper side of the liquid pipe 215. The first guide hole 217 is above the second guide hole 218.

[0091] A connecting plate 214 is fixedly connected between the sealing cover 211 and the pipe disc 213 .

[0092] The process of vacuum low-pressure anti-gravity casting equipment in copper handicraft precision casting is as follows:

[0093] S1: Open the top cover 302, insert the casting mechanism 5 into the lifting ring 401, and fix it with the clip assembly;

[0094] S2: The interior of the pouring mechanism 3 is evacuated by a vacuum pump, and the interior of the mold 501 is evacuated by the suction pipe assembly, and then the lifting mechanism 4 is moved downward to insert the suction pipe assembly into the through hole 203;

[0095] S3: After the copper liquid in the smelting space is smelted to a qualified standard, the internal pressure of the smelting mechanism 2 is reduced by a vacuum pump, and the motor 209 is started to interchange the positions of the sealing cover 211 and the pipe disc 213 so that the liquid pipe 215 is facing the suction pipe 505;

[0096] S4: After the liquid pipe 215 is positioned, it rises under the joint action of the first driving wheel 207 and the second driving wheel 208 and is inserted into the middle outer expansion part of the suction pipe 505, guiding the copper liquid in the smelting space into the casting mold 501 through the first guide hole 217;

[0097] S5: Continue to control the liquid pipe 215 to move upward, so that the upper end of the liquid pipe 215 is flush with the upper end of the suction pipe 505 and blocks the upper end of the suction pipe 505. The excess copper liquid falls back into the smelting space through the second guide hole 218 under the action of gravity.

[0098] S6: After the copper liquid inside the mold 501 is initially formed, the blocked liquid pipe 215 in the suction pipe 505 is removed to ventilate the inside of the mold 501. At the same time, the lifting mechanism 4 is moved upward to release the fixation of the mold mechanism 5, and the mold mechanism 5 is removed for cooling separately.

[0099] The working principle of the present invention is as follows:

[0100] Through the setting of the casting mechanism 5, the external shape of the casting mechanism 5 is consistent and adapted to the lifting mechanism 4, and the internal shape of the casting mechanism 5 can be designed in a variety of ways, so that a variety of copper crafts can be processed on the same equipment. In addition, after the copper craft in the casting mold 501 is basically formed, the casting mechanism 5 can be taken out and finally shaped outside. After taking it out, the equipment can be used to process the next copper craft, thereby improving the efficiency of copper craft processing.

[0101] The mold mechanism 5 is installed into the lifting ring 401 of the lifting mechanism 4. The retaining ring 502 on the outside of the mold 501 can be overlapped on the lifting ring 401 to limit the downward movement of the mold 501. The lower end of the mold 501 pushes the hook 407 of the clamping assembly on the side of the lifting ring 401 to first flip outward with the torsion spring shaft 405 as the axis. When the hook 407 corresponds to the hook groove 503 opened on the outside of the mold 501, it is flipped inward with the torsion spring shaft 405 as the axis, and then the hook 407 is snapped into the hook groove 503, completing the snap limit of the up and down displacement of the mold 501, so that the mold 501 can be quickly and stably installed in the lifting mechanism 4 in the casting bin 301, thereby improving the efficiency of work assembly.

[0102] When the casting mechanism 5 needs to be taken out, the externally arranged cylinder 103 contracts, causing the lifting ring 401 of the lifting mechanism 4 to move up, and the hook 407 is engaged with the hook groove 503 of the casting mechanism 5, thereby driving the casting mechanism 5 to move up synchronously to the upper end outlet of the casting bin 301. Through the arrangement of the through grooves 307 on the four sides of the upper end of the casting bin 301, the outer end of the paddle 408 of the clamping assembly slides along the inclined inner wall surface of the ramp 306, and then flips inward with the torsion spring shaft 405 as the axis during the contact with the ramp 306, thereby automatically releasing the hook 407 from the hook groove 503 during the process of moving the casting mechanism 5 up and taking it out. When the casting mechanism 5 moves up to the outlet, it can be taken out by itself, and the removal and unlocking are automatic.

[0103] The suction tube 505 has an increased radius in the middle and the same radius at both ends, and is connected to the bottom of the mold 501 in a detachable manner. By replacing the suction tube 505 with a different radius in the middle, the filling speed can be adjusted according to actual conditions, thereby improving the adjustable performance.

[0104] A through hole 203 is provided in the upper part of the smelting chamber 201, which is compatible with the end of the suction pipe 505. Initially, the bottom of the through hole 203 is covered with a sealing cover 211. In the early stage of casting, the casting chamber 301 is vacuumed by an external vacuum pump, and then connected to the casting mold 501 through the suction pipe 505 to maintain a synchronous vacuum state inside. The negative pressure state in the casting chamber 301 allows the sealing cover 211 to completely seal the through hole 203, thereby improving the sealing performance.

[0105] After the copper alloy is melted in the smelting space at the bottom of the smelting chamber 201, the casting mechanism 5 is moved downward by the external cylinder 103 so that the end of the suction pipe 505 is inserted into the through hole 203. The air pressure in the smelting chamber 201 is adjusted to a suitable value by the external vacuum pump. The motor 209 in the part space is started to rotate, thereby switching the sealing cover 211 aligned with the through hole 203 to the pipe disk 213. The air pressure in the smelting chamber 201 is adjusted to a suitable value again by the external vacuum pump. At this time, the first drive wheels 207 and the second drive wheels 208 on both sides of the liquid pipe 215 face each other and jointly squeeze the liquid pipe 215. The first drive wheels 207 and the second drive wheels 208 on both sides are started synchronously, so that the liquid pipe 215 rises and is inserted into the middle position of the suction pipe 505. The liquid pipe 215 is adapted to the end of the suction pipe 505. Therefore, under the action of negative pressure, the molten copper in the smelting space flows along the liquid pipe 215 and the suction pipe 505 into the interior of the casting mold 501, thereby improving the accuracy of the counter-gravity pouring.

[0106] When the pouring is completed, the first driving wheel 207 and the second driving wheel 208 on both sides of the liquid pipe 215 are started, and the upper end of the liquid pipe 215 is inserted flush with the upper end of the suction pipe 505 to complete the sealing of the casting mold 501, forming a seamless nested seal to prevent outside air from invading the casting mold 501 during the solidification stage. The casting mold 501 after only the liquid pipe 215 is sealed can maintain its vacuum for a long time. Compared with the open solidification environment of traditional gravity casting, the copper liquid oxidation inclusion defect rate is reduced.

[0107] After sealing, the mold 501, the suction pipe 505, and the liquid pipe 215 are sealed together. The excess molten copper in the suction pipe 505 flows into the second guide hole 218 provided on the liquid pipe 215. Through pressure compensation, the residual molten copper in the liquid pipe 215 is directed back to the smelting space under the action of the pressure difference, thereby avoiding waste and pollution of the molten copper and saving costs.

[0108] After the liquid pipe 215 is inserted into the suction pipe 505 to seal the mold 501, the top cover 302 on the casting bin 301 can be opened to quickly cool the mold 501. After the mold 501 is cooled, the liquid pipe 215 is first moved back to its position by the first driving wheel 207 and the second driving wheel 208. If the negative pressure in the mold 501 is strong at this time, the external cylinder 103 can assist in separating the suction pipe 505 and the liquid pipe 215. At this time, the copper handicraft formed in the mold 501 is connected to the outside world at the suction pipe 505, avoiding the vacuum adsorption resistance during demolding of the traditional closed cavity and improving the demolding efficiency.

[0109] For parts with complex patterns, the entry of outside air into the casting mold 501 can effectively lubricate the mold surface, allowing the casting surface to be completely peeled off, improving the clarity of the patterns and the demoulding quality.

[0110] Before taking the casting mechanism 5, the liquid pipe 215 is first returned to its position, and the sealing cover 211 is rotated back to the through hole 203, thereby completing the isolation of the smelting bin 201 and the casting bin 301, reducing the risk of burns when taking the casting mechanism 5, effectively blocking the invasion of external impurities, and significantly improving the process stability and material utilization rate while ensuring the safety of the operator.

[0111] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum low-pressure anti-gravity casting device for precision casting of copper handicrafts, comprising an outer frame mechanism (1), wherein the outer frame mechanism (1) comprises a base (101); A casting chamber assembly is provided on the base (101), and the casting chamber assembly includes a smelting mechanism (2) for smelting and a pouring mechanism (3) for pouring; The pouring mechanism (3) comprises a pouring bin (301), a top cover (302) is installed on the upper wall of the pouring bin (301), and a bin opening (303) is opened through the lower wall of the pouring bin (301); Its characteristics are: An adjustment groove (305) is provided through the side wall of the casting bin (301); A lifting mechanism (4) is movably provided on the pouring mechanism (3), and the lifting mechanism (4) comprises a lifting ring (401) located inside the pouring bin (301), and connecting columns (402) adapted to be inserted into the adjustment groove (305) are fixedly connected to both sides of the lifting ring (401), and an outer plate (403) is fixedly connected to the outer end of the connecting column (402); The lifting mechanism (4) is sleeved with a casting mechanism (5), the casting mechanism (5) comprising a casting (501) adapted to be plugged into the lifting ring (401), a retaining ring (502) corresponding to the overlapping lifting ring (401) being fixedly sleeved on the outer side of the upper portion of the casting (501), a hook groove (503) being provided on the outer side of the lower portion of the casting (501), a connecting groove (504) being provided on the lower surface of the casting (501), and a straw assembly being installed below the casting (501) through the connecting groove (504).

2. The vacuum low-pressure counter-gravity casting equipment for copper handicraft precision casting according to claim 1 is characterized in that: An outer frame (102) is fixedly mounted on the upper side of the base (101), and cylinders (103) are fixedly connected to the lower sides of the two ends of the crossbeam of the outer frame (102), and the output end of each cylinder (103) is fixedly connected to a cylinder plate (104) corresponding to the outer plate (403).

3. The vacuum low-pressure counter-gravity casting equipment for copper handicraft precision casting according to claim 2 is characterized in that: Second insertion holes (304) are provided through the upper and lower outer walls of the casting bin (301).

4. The vacuum low-pressure counter-gravity casting equipment and process for precision casting of copper handicrafts according to claim 3 is characterized by: The four sides of the upper inner portion of the casting bin (301) are all fixedly connected with a centrally symmetrical inclined platform (306), and the inclined platform (306) is tilted toward one side inward; A through groove (307) corresponding to the adjustment groove (305) is formed through the surface of the inclined platform (306).

5. The vacuum low-pressure counter-gravity casting equipment for precision casting of copper handicrafts according to claim 4 is characterized in that: A baffle (404) that fits the pouring bin (301) is fixedly sleeved on the connecting column (402), and the baffle (404) is sealed and shielded outside the adjustment groove (305), and the end of the baffle (404) is correspondingly plugged into the second socket (304).

6. The vacuum low-pressure counter-gravity casting equipment for copper handicraft precision casting according to claim 5, characterized in that: The outer edges of the lower ports of the lifting ring (401) are respectively fixedly embedded with torsion spring shafts (405), and each torsion spring shaft (405) is movably mounted with a clip assembly; Each of the clip components comprises a sleeve (406) movably sleeved on a torsion spring shaft (405); a hook (407) adapted to fit a hook slot (503) is fixedly connected to the lower side of the sleeve (406); and a shift plate (408) is fixedly connected to the upper side of the sleeve (406); The end of the shift plate (408) corresponds to the inward side of the ramp (306).

7. The vacuum low-pressure counter-gravity casting equipment for precision casting of copper handicrafts according to claim 6, characterized in that: The straw assembly comprises a straw (505) fixedly connected to the casting mold (501), the middle portion of the straw (505) is expanded outward, and the upper end of the straw (505) is fixedly sleeved with a receiving plate (506) adapted to engage with the connecting groove (504).

8. The vacuum low-pressure counter-gravity casting equipment for precision casting of copper handicrafts according to claim 7, characterized in that: The smelting mechanism (2) comprises a smelting chamber (201) fixedly connected to a base (101), a partition (202) fixedly connected to the interior of the smelting chamber (201), and the partition (202) divides the interior of the smelting chamber (201) into a smelting space and a parts space; The upper surface of the smelting bin (201) is fixedly connected to the casting bin (301); A through hole (203) is provided in the middle of the upper surface of the smelting chamber (201) to accommodate a lower port of the suction pipe (505); The upper wall of the smelting chamber (201) is provided with a first plug hole (204) connected to the second plug hole (304); The lower inner wall of the smelting chamber (201) is provided with a bottom groove (205); A rotating disk (206) corresponding to the bottom groove (205) is movably embedded on the surface of the partition (202), a first driving wheel (207) is fixedly mounted on the upper surface of the rotating disk (206), and a second driving wheel (208) corresponding to the first driving wheel (207) is fixedly mounted on the upper surface of the partition (202); A switching assembly is provided in the part space, the switching assembly comprising a motor (209) fixedly embedded in the upper inner wall of the smelting chamber (201), an output end of the motor (209) being fixedly connected to a connecting plate (210), one end of the connecting plate (210) being fixedly connected to a sealing cover (211), and an upper surface of the sealing cover (211) being fixedly connected to a sealing gasket (212) that abuts against the upper wall of the smelting chamber (201); The other end of the connecting plate (210) is fixedly connected to a pipe disc (213) that is attached to the upper wall of the smelting bin (201); a liquid pipe (215) corresponding to the bottom trough (205) is inserted through the middle of the pipe disc (213); the upper end of the liquid pipe (215) is sealed and adapted to the port of the suction pipe (505); the lower end of the liquid pipe (215) is open and has a notch (216); a first guide hole (217) and a second guide hole (218) are penetrated through the upper side of the liquid pipe (215); the first guide hole (217) is located above the second guide hole (218); A connecting plate (214) is fixedly connected between the sealing cover (211) and the pipe disc (213).

9. The process of the vacuum low-pressure counter-gravity casting equipment in the precision casting of copper handicrafts according to claim 8, wherein the steps are as follows: S1: Open the top cover (302), insert the casting mechanism (5) into the lifting ring (401), and fix it with the clip assembly; S2: The interior of the pouring mechanism (3) is vacuumed by a vacuum pump, and the interior of the mold (501) is vacuumed by a suction pipe assembly, and then the lifting mechanism (4) is moved downward to insert the suction pipe assembly into the through hole (203); S3: After the copper liquid in the smelting space is smelted to a qualified standard, the internal air pressure of the smelting mechanism (2) is reduced by a vacuum pump, and the motor (209) is started to interchange the positions of the sealing cover (211) and the pipe disc (213) so that the liquid pipe (215) is directly opposite the suction pipe (505); S4: After the liquid pipe (215) is positioned, it rises under the joint action of the first driving wheel (207) and the second driving wheel (208) and is inserted into the middle outer expansion part of the suction pipe (505), and guides the copper liquid in the smelting space into the casting mold (501) through the first guide hole (217); S5: Continue to control the liquid pipe (215) to move upward, so that the upper end of the liquid pipe (215) is flush with the upper end of the suction pipe (505) to block the upper end, and the excess copper liquid falls back into the smelting space through the second guide hole (218) under the action of gravity; S6: After the copper liquid inside the mold (501) is initially formed, the blocked liquid pipe (215) in the suction pipe (505) is removed, the inside of the mold (501) is ventilated, and at the same time, the lifting mechanism (4) is moved upward to release the fixation of the mold mechanism (5), and the mold mechanism (5) is removed and cooled separately.

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