Double-station low-pressure casting machine capable of rapidly changing furnace

Abstract

The invention relates to a double-station low-pressure casting machine capable of quickly changing a furnace, which comprises a low-pressure casting machine body, a scraper knife mechanism and a furnace changing mechanism, the furnace changing mechanism comprises a furnace changing trolley sliding along a guide rail, the furnace changing trolley is provided with two furnace changing stations, and a holding furnace placed on the furnace changing stations is changed through lifting of a lifting device. According to the method, the cleanliness of molten aluminum can be improved, rapid furnace changing is achieved, the equipment stop time can be shortened, and the situation that the product casting quality is finally affected due to mold heat loss caused by equipment stop operation is reduced. And the scraper knife mechanism is used for shoveling a sealing ring and residual molten aluminum at the bottom of the mold through two scraper knife heads, so that the cleaning work before the heat preservation furnace is switched is completed.

Description

Technical Field

[0001] The invention relates to a low-pressure casting machine, in particular to a double-station fast-furnace-changing low-pressure casting machine, belonging to the technical field of low-pressure casting equipment. Background Art

[0002] With the industrial upgrading of the manufacturing industry, in order to keep up with the trend of the times, low-pressure casting equipment also needs to be upgraded iteratively to meet today's requirements for efficiency and quality. The production efficiency of low-pressure casting equipment has a great relationship with the rhythm and time of adding aluminum liquid to the holding furnace. Improving the efficiency of adding aluminum liquid to the holding furnace will greatly improve the casting efficiency of the low-pressure casting machine. The product quality of the casting is absolutely related to the composition of the aluminum liquid and the stability of the casting. If the crucible casting equipment can improve the cleanliness of the aluminum liquid and realize rapid furnace change, it will be able to improve the casting quality.

[0003] Furthermore, the crucible furnace low-pressure casting machine needs to use a sealing gasket to seal the riser pipe mouth and the mold feed port for filling casting. After the casting is completed, the riser pipe and the mold feed port are separated, and the sealing gasket is stuck to the bottom of the mold feed port. After the insulation furnace is filled with molten aluminum and before entering the equipment, the sealing gasket and residual aluminum liquid remaining at the bottom of the mold must be cleaned up, otherwise it will cause aluminum or air leakage at the joint surface between the riser pipe and the mold feed port, resulting in aluminum leakage and unqualified casting problems.

[0004] Based on this, the present invention is proposed. Summary of the invention

[0005] In view of the above technical problems of the prior art, the purpose of the present invention is to provide a dual-station fast furnace-changing low-pressure casting machine, which can improve the cleanliness of aluminum liquid and realize fast furnace change, shorten the equipment downtime, reduce the heat loss of the mold caused by the equipment stopping operation, and ultimately affect the casting quality of the product. The scraper mechanism uses two scraper heads to scrape off the sealing ring and residual aluminum liquid at the bottom of the mold to complete the cleaning work before switching the holding furnace.

[0006] To achieve the above object, the present invention is achieved through the following technical solutions: A double-station rapid furnace-changing low-pressure casting machine comprises a low-pressure casting machine body, a scraper mechanism and a furnace-changing mechanism, wherein the furnace-changing mechanism comprises a furnace-changing trolley sliding along a guide track, a trolley driving device is provided at the bottom of the furnace-changing trolley, the furnace-changing trolley is provided with two furnace-changing stations, and the heat-insulating furnace placed on the furnace-changing stations is lifted and lowered by a lifting device to achieve furnace changing; the lifting device comprises an elevator driving motor, the elevator driving motor is connected to a transmission shaft 1 and a transmission shaft 2, the transmission shaft 1 is connected to a transmission shaft 3 through a transmission box, so a lifting turbine is provided on both the transmission shaft 2 and the transmission shaft 3.

[0007] The lifting turbine is provided with a lifting rod, the lifting rod is connected with a lifting plate, and the heat preservation furnace is installed on the lifting plate.

[0008] There are two lifting turbines, which are respectively located at two ends of the lifting plate, and a plurality of guide columns are provided below the lifting plate, and the guide columns are located between the two lifting turbines.

[0009] The trolley driving device includes a plurality of follower wheels and guide wheels, which are respectively located on both sides of the furnace changing trolley, and a movable driving cylinder is provided between the follower wheels and the guide wheels. The guide wheel is located on the guide rail and rotates under the drive of the movable driving cylinder to realize the movement of the furnace changing trolley.

[0010] The two furnace changing stations are respectively provided with a No. 1 crucible insulation furnace and a No. 2 crucible insulation furnace, both of which are provided with furnace covers, and the furnace covers are provided with temperature measuring thermocouples and liquid riser pipes with liquid riser pipe ports.

[0011] The furnace changing trolley is provided with a drag chain, and the power supply and gas supply of the insulation furnace are connected through the drag chain, and the No. 1 crucible insulation furnace and the No. 2 crucible insulation furnace adopt the mode of independent control heating and independent filling operation.

[0012] The scraper mechanism includes a fixed crossbeam, a scraper assembly is installed on the fixed crossbeam, and a material receiving hopper is provided below the scraper assembly; the scraper assembly includes a scraper mounting seat, a plurality of drive shafts are provided on the scraper mounting seat, a scraper is provided on the drive shaft, connecting rods are provided at both ends of the scraper, and the ends of the connecting rods are connected to the driving device.

[0013] There are two drive shafts, which are arranged in parallel on the blade mounting seat. The output shaft of the drive device is provided with a connecting rod mounting opening, and the two connecting rods are connected to the output shaft of the drive device in the connecting rod mounting opening.

[0014] The scraper is erected on the driving shaft through an adjusting screw.

[0015] Guide plates are arranged on both sides of the receiving hopper, and the receiving hopper is inserted between the two guide plates.

[0016] The dual-station rapid furnace-changing low-pressure casting machine of the present invention has the following beneficial effects: The furnace changing trolley in the present invention is provided with a double workstation, which is a preparation workstation, which is composed of two preparation workstations and a casting workstation on a low-pressure casting machine to form a three-workstation rapid casting unit. When in use, the two preparation workstations prepare molten aluminum alternately, and the casting workstation continuously performs casting production, thereby reducing the equipment downtime waiting time caused by the addition of molten aluminum and preparation work; by placing the No. 1 crucible insulation furnace and the No. 2 crucible insulation furnace on the furnace changing trolley for alternating use, the furnace changing trolley switches the furnace changing trolley between the three workstations through a trolley driving device arranged on the ground, and the double-workstation structure of the furnace changing trolley can achieve on-site back and forth switching to complete the switching of the three workstations, thereby achieving the effect of rapid furnace changing and positioning.

[0017] 2. The furnace changing trolley in the present invention is provided with two lifting devices. After the furnace changing trolley is driven to the bottom of the equipment, the holding furnace realizes the combination of the liquid riser and the aluminum inlet of the mold on the workbench through the lifting device to complete the connection of the casting channel; and the holding furnace is equipped with a furnace cover. After the aluminum liquid in the holding furnace is used up, the empty furnace is moved out of the equipment and the holding furnace is switched to the holding furnace to replace the holding furnace; and the power supply and gas supply of the holding furnace are connected through the drag chain on the furnace changing trolley, and the two holding furnaces independently control the heating and filling operations.

[0018] 3. When the present invention is used, the double-station furnace-changing trolley is externally connected to the aluminum liquid turnover trolley. The insulation on the turnover trolley is replaced with the insulation furnace of the preparation station. The insulation completed by adding aluminum is prepared in advance. After the aluminum liquid in the insulation furnace inside the casting machine is used up, the replacement of the empty furnace with the full furnace is completed at the fastest speed.

[0019] 4. The scraper mechanism of the present invention has two scrapers, and connecting rods are arranged at both ends of the scrapers, and the connecting rods of the two scrapers are synchronously driven by a driving device, so as to achieve the effect of bidirectional scraping of the sealing ring and residual aluminum liquid at the bottom of the mold feed port; the driving device drives the connecting rod to reciprocate, and the two scrapers cooperate with each other to achieve the effect of scraping off the residue at the bottom of the mold in both directions; and the scraper assembly is driven by a bidirectional connecting rod, and after the edge of one scraper is flush with the bottom of the mold, the other scraper is synchronously lowered to avoid.

[0020] 5. The back of the scraper in the present invention is limited by an adjusting screw installed on the drive shaft. The scraper stands upright on the drive shaft. When the upright cutting edge scrapes the residue at the bottom of the mold, the pressure of the scraper is transmitted to the back drive shaft through the adjusting screw to increase the scraping force of the scraper, thereby improving the cleanliness of the scraper at the bottom of the mold.

[0021] 6. The present invention provides a receiving hopper at the bottom of the scraper assembly. The sealing ring, aluminum liquid and other residues dropped during the scraping process fall into the bottom receiving hopper through the guide plates on both sides. The receiving hopper is pull-out, which is convenient for manual cleaning of the residues. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a side view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the top view of the structure of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the furnace changing trolley in the present invention; Figure 5 It is a schematic diagram of the bottom structure of the furnace changing trolley in the present invention; Figure 6 It is a structural schematic diagram of the lifting device in the present invention; Figure 7 It is a structural schematic diagram of the trolley driving device in the present invention; Figure 8 It is a structural schematic diagram of the furnace cover in the present invention; Fig. 9 It is a three-dimensional structural schematic diagram of the scraper mechanism in the present invention; Fig.10 It is a schematic diagram of the installation position of the receiving hopper in the present invention; Fig.11 It is a schematic diagram of the top view of the scraper mechanism in the present invention; Fig.12 It is a side structural schematic diagram of the scraper mechanism in the present invention; Fig.13 for Fig.12 A schematic diagram of the enlarged structure of part A; Fig.14 It is a three-dimensional structural schematic diagram of the scraper assembly in the present invention; Fig.15 It is a schematic diagram of the front view structure of the scraper assembly in the present invention; Fig.16 It is a side structural schematic diagram of the scraper assembly in the present invention; Wherein, 1 is the low pressure casting machine body; 2 is a scraper mechanism, 21 is a fixed crossbeam, 22 is a receiving hopper, 23 is a scraper mounting seat, 24 is a drive shaft, 25 is a scraper, 26 is a connecting rod, 27 is a driving device, 28 is an output shaft, 29 is a connecting rod mounting port, 210 is an adjusting screw, 211 is a triangular reinforcement frame, and 212 is a guide plate; 3 is a furnace changing mechanism, 31 is a furnace changing trolley, 32 is a furnace changing station, 33 is a lifting device, 331 is a lift driving motor, 332 is a transmission shaft 1, 333 is a transmission shaft 2, 334 is a transmission box, 335 is a transmission shaft 3, 336 is a lifting turbine, 337 is a lifting rod, 338 is a lifting plate, 339 is a guide column, 34 is a trolley driving device, 341 is a follower wheel, 342 is a guide wheel, and 343 is a mobile driving cylinder; 4 is a guide rail; 5 is a No. 1 crucible insulation furnace; 6 is a No. 2 crucible insulation furnace; 7 is a furnace cover; 8 is a liquid riser pipe opening; 9 is a liquid riser pipe; and 10 is a temperature measuring thermocouple. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.

[0024] like Figure 1-8 As shown, the double-station rapid furnace-changing low-pressure casting machine of the present invention comprises a low-pressure casting machine body 1, a scraper mechanism 2 and a furnace-changing mechanism 3. The furnace-changing mechanism 2 comprises a furnace-changing trolley 31 sliding along a guide rail 4. The furnace-changing trolley 31 is provided with two furnace-changing stations 32. A No. 1 crucible insulation furnace 5 and a No. 2 crucible insulation furnace 6 are respectively placed on the two furnace-changing stations 32. The No. 1 crucible insulation furnace 5 and the No. 2 crucible insulation furnace 6 are respectively lifted and lowered by independent lifting devices 33 to realize furnace changing. In this embodiment, the double station on the furnace changing trolley 31 is a preparation station, which is composed of two preparation stations and a casting station on the low-pressure casting machine body 1 to form a three-station rapid casting unit. When in use, the two preparation stations alternately prepare molten aluminum, and the casting station continuously performs casting production, thereby reducing the equipment downtime waiting time caused by the addition of molten aluminum and preparation work; by being placed alternately on the No. 1 crucible insulation furnace 5 and the No. 2 crucible insulation furnace 6 on the furnace changing trolley 31, the furnace changing trolley 31 switches the furnace changing trolley 31 between the three stations through the trolley driving device 34 arranged on the ground. The double station structure of the furnace changing trolley 31 can achieve the switching of the three stations by alternating back and forth on site, thereby achieving the effect of rapid furnace changing and positioning.

[0025] Further, the lifting device 33 in the present invention includes a lift drive motor 331, the lift drive motor 331 is connected to a transmission shaft 1 332 and a transmission shaft 2 333, the transmission shaft 1 332 is connected to a transmission shaft 3 335 through a transmission box 334 (the transmission box is a conventional gear meshing transmission, which is not described here), and a lifting turbine 336 is provided on the transmission shaft 2 333 and the transmission shaft 3 335, and the lifting turbine 336 is provided with a lifting rod 337, and a lifting plate 338 is connected to the lifting rod 337, and the heat preservation furnace is installed on the lifting plate 338. In this embodiment, there are two lifting turbines 336, and the two lifting turbines 336 are respectively located at the two ends of the lifting plate 338, and a plurality of guide columns 339 are provided below the lifting plate 338, such as two guide columns 339, and the guide column 339 is located between the two lifting turbines 336, so that the lifting of the heat preservation furnace is more stable.

[0026] In this embodiment, the two lifting devices 33 on the furnace changing trolley 31, after the furnace changing trolley 31 is driven to the bottom of the equipment, the No. 1 crucible insulation furnace 5 and the No. 2 crucible insulation furnace 6 realize the combination of the liquid riser 9 and the aluminum inlet of the mold on the workbench through the corresponding lifting devices 33, and complete the connection of the casting channel. The No. 1 crucible insulation furnace 5 and the No. 2 crucible insulation furnace 6 are both equipped with a furnace cover 7, and the furnace cover 7 is provided with a temperature measuring thermocouple 10 and a liquid riser 9 with a liquid riser nozzle 8. After the aluminum liquid is used up, the empty furnace is moved out of the equipment, and the insulation furnace is switched to the insulation furnace to replace the insulation furnace; and the furnace changing trolley 31 is provided with a drag chain 10, and the power supply and gas supply of the insulation furnace are connected through the drag chain 10, and the No. 1 crucible insulation furnace 5 and the No. 2 crucible insulation furnace 6 independently control the heating and filling operations.

[0027] Furthermore, a trolley driving device 34 is provided at the bottom of the furnace changing trolley 31 in the present invention. The trolley driving device 34 includes a plurality of follower wheels 341 and guide wheels 342. For example, four follower wheels 341 and four guide wheels 342 are respectively located on both sides of the furnace changing trolley 31, and a movable driving cylinder 343 is provided between the follower wheels 341 and the guide wheels 342. The guide wheels 342 are located on the guide rail 4 and rotate under the drive of the movable driving cylinder 343 to realize the movement of the furnace changing trolley 31.

[0028] When the present invention is in use, the double-station furnace changing trolley 31 is connected to an external aluminum liquid turnover trolley, and the insulation on the turnover trolley is replaced with the insulation furnace of the preparation station, and the insulation completed by adding aluminum is prepared in advance. After the aluminum liquid in the insulation furnace inside the low-pressure casting machine is used up, the replacement of the empty furnace with the full furnace is completed at the fastest speed.

[0029] Further settings, such as Figure 9-16 As shown, the scraper mechanism 2 in the present invention includes a fixed crossbeam 21, a scraper assembly is installed on the fixed crossbeam 21, a receiving hopper 22 is provided below the scraper assembly, guide plates 212 are provided on both sides of the receiving hopper 22, and the receiving hopper 22 is inserted between the two guide plates 212. The sealing ring and aluminum liquid and other residues dropped during the scraping process fall into the bottom receiving hopper 22 through the guide plates 212 on both sides. The receiving hopper 22 is a pull-out method, which is convenient for manual cleaning of the residues.

[0030] Furthermore, the scraper assembly of the present invention includes a scraper mounting seat 23, on which a plurality of drive shafts 24 are arranged. In this embodiment, there are two drive shafts 24, which are arranged in parallel on the scraper mounting seat 23. Each drive shaft 24 is provided with a scraper 25, which is erected on the drive shaft 24 through an adjusting screw 210. The back of the scraper 25 is limited by an adjusting screw 210 installed on the drive shaft 24, and the scraper 25 is erected on the drive shaft 24. When the scraper 25 scrapes the residue at the bottom of the mold through the erected edge, the pressure of the scraper 25 is transmitted to the back drive shaft 24 through the adjusting screw 210 to increase the scraping force of the scraper 25, thereby improving the cleanliness of the scraping at the bottom of the mold.

[0031] Furthermore, the scraper 25 of the present invention is provided with connecting rods 26 at both ends, and the output shaft 28 of the driving device 27 is provided with a connecting rod installation opening 29, and the two connecting rods 26 are connected to the output shaft 28 of the driving device 27 in the connecting rod installation opening 29. The connecting rods 26 of the two scrapers 25 are synchronously driven by a driving device 27, so as to achieve the effect of bidirectionally scraping off the sealing ring and the residual aluminum liquid at the bottom of the mold feed port; the driving device 27 drives the connecting rod 26 to reciprocate, and the two scrapers 25 cooperate with each other to achieve the effect of scraping off the residue at the bottom of the mold in both directions; and the scraper assembly is driven by the bidirectional connecting rod 26, and after the edge of one scraper 25 is flush with the bottom of the mold, the other scraper 25 is synchronously lowered to avoid.

[0032] The scraper mechanism 2 is fixed on the gantry when in use, a triangular reinforcement frame 211 is provided below the fixed crossbeam 21, the gantry is fixed on the mobile device, and the mobile device reciprocates at the bottom of the casting equipment to perform a scraping operation. In the present invention, the sealing ring and residual aluminum liquid at the bottom of the mold are scraped off by two scraper heads to complete the cleaning work before the insulation furnace is switched.

[0033] The above embodiments are only used to explain the inventive concept of the present invention, rather than to limit the protection of the rights of the present invention. Any non-substantial changes to the present invention using this concept shall fall within the protection scope of the present invention.

Claims

1. A dual-station rapid furnace-changing low-pressure casting machine, characterized in that: It includes a low-pressure casting machine body, a scraper mechanism and a furnace changing mechanism, the furnace changing mechanism includes a furnace changing trolley sliding along a guide track, a trolley driving device is provided at the bottom of the furnace changing trolley, the furnace changing trolley is provided with two furnace changing stations, and the insulation furnace placed on the furnace changing station is lifted and lowered by a lifting device to achieve furnace changing; the lifting device includes an elevator driving motor, the elevator driving motor is connected to a transmission shaft 1 and a transmission shaft 2, the transmission shaft 1 is connected to a transmission shaft 3 through a transmission box, so a lifting turbine is provided on the transmission shaft 2 and the transmission shaft 3.

2. The dual-station rapid furnace-changing low-pressure casting machine according to claim 1, characterized in that: The lifting turbine is provided with a lifting rod, the lifting rod is connected with a lifting plate, and the heat preservation furnace is installed on the lifting plate.

3. The dual-station rapid furnace-changing low-pressure casting machine according to claim 2, characterized in that: There are two lifting turbines, which are respectively located at two ends of the lifting plate, and a plurality of guide columns are provided below the lifting plate, and the guide columns are located between the two lifting turbines.

4. The dual-station rapid furnace-changing low-pressure casting machine according to claim 1, characterized in that: The trolley driving device includes a plurality of follower wheels and guide wheels, which are respectively located on both sides of the furnace changing trolley, and a movable driving cylinder is provided between the follower wheels and the guide wheels. The guide wheel is located on the guide rail and rotates under the drive of the movable driving cylinder to realize the movement of the furnace changing trolley.

5. The dual-station rapid furnace-changing low-pressure casting machine according to claim 1, characterized in that: The two furnace changing stations are respectively provided with a No. 1 crucible insulation furnace and a No. 2 crucible insulation furnace, both of which are provided with furnace covers, and the furnace covers are provided with temperature measuring thermocouples and liquid riser pipes with liquid riser pipe ports.

6. The dual-station rapid furnace-changing low-pressure casting machine according to claim 5, characterized in that: The furnace changing trolley is provided with a drag chain, and the power supply and gas supply of the insulation furnace are connected through the drag chain, and the No. 1 crucible insulation furnace and the No. 2 crucible insulation furnace adopt the mode of independent control heating and independent filling operation.

7. The dual-station rapid furnace-changing low-pressure casting machine according to claim 1, characterized in that: The scraper mechanism includes a fixed crossbeam, a scraper assembly is installed on the fixed crossbeam, and a material receiving hopper is provided below the scraper assembly; the scraper assembly includes a scraper mounting seat, a plurality of drive shafts are provided on the scraper mounting seat, a scraper is provided on the drive shaft, connecting rods are provided at both ends of the scraper, and the ends of the connecting rods are connected to the driving device.

8. The dual-station rapid furnace-changing low-pressure casting machine according to claim 7, characterized in that: There are two drive shafts, which are arranged in parallel on the blade mounting seat. The output shaft of the drive device is provided with a connecting rod mounting opening, and the two connecting rods are connected to the output shaft of the drive device in the connecting rod mounting opening.

9. The dual-station rapid furnace-changing low-pressure casting machine according to claim 7, characterized in that: The scraper is erected on the driving shaft through an adjusting screw.

10. The dual-station rapid furnace-changing low-pressure casting machine according to claim 7, characterized in that: Guide plates are arranged on both sides of the receiving hopper, and the receiving hopper is inserted between the two guide plates.

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