A double-station rapid furnace-changing low-pressure casting machine

Abstract

The present invention relates to a dual-station rapid furnace-changing low-pressure casting machine, comprising 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, the furnace-changing trolley is provided with two furnace-changing stations, and a heat-insulating furnace placed on the furnace-changing station is lifted and lowered by a lifting device to achieve furnace-changing. The present invention can improve the cleanliness of aluminum liquid, and realize rapid furnace-changing, shorten the equipment downtime, reduce the heat loss of the mold due to the equipment stopping operation, and finally affect the casting quality of the product. The scraper mechanism removes the sealing ring and residual aluminum liquid at the bottom of the mold through two scraper heads to complete the cleaning work before the heat-insulating furnace is switched.

Description

Technical Field

[0001] The present invention relates to a low-pressure casting machine, and more particularly to a two-station rapid 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 iteratively upgraded to meet the current requirements of efficiency and quality. The production efficiency of low-pressure casting equipment is greatly related to the rhythm and time of adding molten aluminum to the holding furnace. Improving the efficiency of adding molten aluminum to the holding furnace will greatly improve the casting efficiency of the low-pressure casting machine. And the product quality of the casting is absolutely related to the molten aluminum composition and casting stability. If the crucible casting equipment can improve the cleanliness of the molten aluminum and achieve rapid furnace change, the casting quality can be improved.

[0003] Furthermore, the crucible furnace type low-pressure casting machine needs to use a gasket to seal the liquid-riser pipe orifice and the mold feeding orifice for filling and casting. After casting is completed, the liquid-riser pipe and the mold feeding orifice are separated. At this time, the sealing gasket adheres to the bottom of the mold feeding orifice. Before the holding furnace enters the equipment after adding molten aluminum, it is necessary to clean the residual sealing gasket and residual molten aluminum at the bottom of the mold. Otherwise, leakage of molten aluminum or air leakage will occur at the joint surface between the liquid-riser pipe and the mold feeding orifice, resulting in problems such as molten aluminum running away during production and unqualified casting.

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

[0005] In view of the above technical problems in the prior art, the object of the present invention is to provide a two-station rapid furnace-changing low-pressure casting machine, which can improve the cleanliness of molten aluminum, achieve rapid furnace change, can shorten the equipment downtime, reduce the loss of mold heat caused by the equipment stopping operation, and ultimately affect the product casting quality. And the scraper mechanism uses two scraper heads to remove the sealing ring and residual molten aluminum at the bottom of the mold to complete the cleaning work before the holding furnace is switched.

[0006] To achieve the above object, the present invention is realized through the following technical solutions:

[0007] A two-station rapid furnace-changing low-pressure casting machine includes a low-pressure casting machine body, a scraper mechanism, and a furnace-changing mechanism. The furnace-changing mechanism includes a furnace-changing trolley that slides along a guiding track. The bottom of the furnace-changing trolley is provided with a trolley driving device. The furnace-changing trolley has 2 furnace-changing stations, and the holding furnace placed on the furnace-changing station is lifted by a lifting device to achieve furnace change. The lifting device includes a lift driving motor, the lift driving motor is connected with a first transmission shaft and a second transmission shaft. The first transmission shaft is connected with a third transmission shaft through a transmission box. Lifting turbines are provided on both the second transmission shaft and the third transmission shaft.

[0008] The described lifting turbine is provided with a lifting rod, a lifting plate is connected to the lifting rod, and the heat preservation furnace is installed on the lifting plate.

[0009] There are 2 described lifting turbines, the 2 lifting turbines are respectively located at both ends of the lifting plate, and a number of guide columns are provided below the lifting plate, and the guide columns are located between the 2 lifting turbines.

[0010] The trolley driving device includes a number of follower wheels and guide wheels. The follower wheels and the guide wheels are respectively located on both sides of the furnace-changing trolley, and a moving driving oil cylinder is provided between the follower wheels and the guide wheels. The guide wheels are located on the guide track and rotate under the drive of the moving driving oil cylinder to realize the movement of the furnace-changing trolley.

[0011] A No. 1 crucible heat preservation furnace and a No. 2 crucible heat preservation furnace are respectively provided on 2 furnace-changing stations. The No. 1 crucible heat preservation furnace and the No. 2 crucible heat preservation furnace are both provided with furnace lids, and the furnace lids are provided with temperature-measuring thermocouples and riser pipes with riser nozzles.

[0012] The furnace-changing trolley is provided with a drag chain. The power supply and gas supply of the heat preservation furnace are both connected through the drag chain, and the No. 1 crucible heat preservation furnace and the No. 2 crucible heat preservation furnace adopt an independent control heating and independent filling operation mode.

[0013] The described shovel mechanism includes a fixed cross beam, a shovel assembly is installed on the fixed cross beam, and a receiving hopper is provided below the shovel assembly; the shovel assembly includes a shovel mounting seat, a number of drive shafts are provided on the shovel mounting seat, shovels are provided on the drive shafts, connecting rods are provided at both ends of the shovels, and a driving device is connected to the end of the connecting rod.

[0014] There are 2 described drive shafts, the 2 drive shafts are arranged in parallel on the shovel mounting seat, the output shaft of the driving device is provided with a connecting rod mounting port, and the 2 connecting rods are connected to the output shaft of the driving device in the connecting rod mounting port.

[0015] The described shovel is erected on the drive shaft through adjusting screws.

[0016] Guide plates are provided on both sides of the receiving hopper, and the receiving hopper is inserted between the two guide plates.

[0017] The double-station rapid furnace-changing low-pressure casting machine of the present invention has the following beneficial effects:

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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

[0024] Figure 1 Schematic three - dimensional structure diagram of the present invention;

[0025] Figure 2 Schematic side - view structure diagram of the present invention;

[0026] Figure 3 Schematic top - view structure diagram of the present invention;

[0027] Figure 4 Schematic three - dimensional structure diagram of the ladle - changing trolley in the present invention;

[0028] Figure 5 Schematic bottom - view structure diagram of the ladle - changing trolley in the present invention;

[0029] Figure 6 Schematic structure diagram of the lifting device in the present invention;

[0030] Figure 7 Schematic structure diagram of the trolley driving device in the present invention;

[0031] Figure 8 Schematic structure diagram of the furnace cover in the present invention;

[0032] Figure 9 Schematic three - dimensional structure diagram of the shovel mechanism in the present invention;

[0033] Figure 10 Schematic installation position diagram of the receiving hopper in the present invention;

[0034] Figure 11 Schematic top - view structure diagram of the shovel mechanism in the present invention;

[0035] Figure 12 Schematic side - view structure diagram of the shovel mechanism in the present invention;

[0036] Figure 13 is Figure 12 Schematic enlarged structure diagram of part A therein;

[0037] Figure 14 Schematic three - dimensional structure diagram of the shovel assembly in the present invention;

[0038] Figure 15 Schematic front - view structure diagram of the shovel assembly in the present invention;

[0039] Figure 16 Schematic side - view structure diagram of the shovel assembly in the present invention;

[0040] Among them, 1 is the low - pressure casting machine body;

[0041] 2 is the scraper mechanism, 21 is the fixed crossbeam, 22 is the receiving hopper, 23 is the scraper mounting seat, 24 is the drive shaft, 25 is the scraper, 26 is the connecting rod, 27 is the drive device, 28 is the output shaft, 29 is the connecting rod mounting opening, 210 is the adjusting screw, 211 is the triangular reinforcing frame, 212 is the guide plate;

[0042] 3 is the furnace-changing mechanism, 31 is the furnace-changing trolley, 32 is the furnace-changing station, 33 is the lifting device, 331 is the lifting motor of the elevator, 332 is the first transmission shaft, 333 is the second transmission shaft, 334 is the transmission box, 335 is the third transmission shaft, 336 is the lifting turbine, 337 is the lifting rod, 338 is the lifting plate, 339 is the guide post, 34 is the trolley drive device, 341 is the follower wheel, 342 is the guide wheel, 343 is the moving drive oil cylinder;

[0043] 4 is the guide track; 5 is the No. 1 crucible holding furnace; 6 is the No. 2 crucible holding furnace; 7 is the furnace cover; 8 is the liquid-rising nozzle; 9 is the liquid-rising pipe; 10 is the temperature-measuring thermocouple. Specific embodiments

[0044] The present invention will be further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.

[0045] As Figures 1-8 shown, the double-station rapid furnace-changing low-pressure casting machine of the present invention includes a low-pressure casting machine body 1, a scraper mechanism 2 and a furnace-changing mechanism 3. The furnace-changing mechanism 2 includes a furnace-changing trolley 31 that slides along the guide track 4. The furnace-changing trolley 31 is provided with 2 furnace-changing stations 32, and the No. 1 crucible holding furnace 5 and the No. 2 crucible holding furnace 6 are respectively placed on the 2 furnace-changing stations 32. The No. 1 crucible holding furnace 5 and the No. 2 crucible holding furnace 6 are respectively lifted by independent lifting devices 33 to achieve furnace changing. In this embodiment, the double-station on the furnace-changing trolley 31 is the preparation station, which consists of two preparation stations and one casting station on the low-pressure casting machine body 1 to form a three-station rapid casting unit. During use, the two preparation stations alternately prepare the molten aluminum, and the casting station continuously carries out casting production, thereby reducing the equipment downtime waiting time caused by the addition and preparation of the molten aluminum; by alternately using the No. 1 crucible holding furnace 5 and the No. 2 crucible holding furnace 6 placed on the furnace-changing trolley 31, the furnace-changing trolley 31 is switched between the three stations by the trolley drive device 34 arranged on the ground. The double-station structure of the furnace-changing trolley 31 can complete the switching of the three stations by alternately moving back and forth on the spot, achieving the effect of rapid furnace-changing positioning.

[0046] Further, the lifting device 33 in the present invention includes a lift drive motor 331. The lift drive motor 331 is connected to a first drive shaft 332 and a second drive shaft 333. The first drive shaft 332 is connected to a third drive shaft 335 through a transmission box 334 (the transmission box is a conventional gear meshing transmission, which will not be elaborated here). Lifting turbines 336 are provided on both the second drive shaft 333 and the third drive shaft 335. The lifting turbines 336 are provided with lifting rods 337. A lifting plate 338 is connected to the lifting rods 337. The holding furnace is installed on the lifting plate 338. In this embodiment, there are 2 lifting turbines 336. The 2 lifting turbines 336 are respectively located at both ends of the lifting plate 338. And several guide columns 339, such as 2 guide columns 339, are provided below the lifting plate 338. The guide columns 339 are located between the 2 lifting turbines 336, making the lifting of the holding furnace more stable.

[0047] In this embodiment, for 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 1st crucible holding furnace 5 and the 2nd crucible holding furnace 6 realize the combination of the molten metal riser 9 and the mold aluminum inlet on the workbench plate through the corresponding lifting devices 33, completing the connection of the casting channel. And both the 1st crucible holding furnace 5 and the 2nd crucible holding furnace 6 are equipped with furnace lids 7. The furnace lids 7 are provided with temperature-measuring thermocouples 10 and molten metal risers 9 with molten metal riser openings 8. After the aluminum liquid is used up, the empty furnace is removed from the equipment and moved to the holding furnace switching station for the replacement of the holding furnace. And a drag chain 10 is provided on the furnace-changing trolley 31. The power supply and gas supply of the holding furnace are connected through the drag chain 10. The 1st crucible holding furnace 5 and the 2nd crucible holding furnace 6 are independently controlled for heating and filling operations.

[0048] Furthermore, a trolley drive device 34 is provided at the bottom of the furnace-changing trolley 31 in the present invention. The trolley drive device 34 includes several follower wheels 341 and guide wheels 342. For example, 4 follower wheels 341 and 4 guide wheels 342 are respectively located on both sides of the furnace-changing trolley 31. And a mobile drive oil cylinder 343 is provided between the follower wheels 341 and the guide wheels 342. The guide wheels 342 are located on the guide track 4 and rotate under the drive of the mobile drive oil cylinder 343 to realize the movement of the furnace-changing trolley 31.

[0049] When the present invention is in use, the double-station furnace-changing trolley 31 is externally connected to an aluminum liquid transfer trolley. Through the replacement of the holding furnace at the heat preservation and preparation station on the transfer trolley, the heat preservation after adding aluminum is prepared in advance. After the aluminum liquid in the holding furnace inside the low-pressure casting machine is used up, the replacement of the empty furnace and the full furnace is completed at the fastest speed.

[0050] Furthermore, as Figures 9-16As 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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 double-station rapid furnace-changing low-pressure casting machine, characterized in that: It includes a low-pressure casting machine body, a scraping knife mechanism and a furnace changing mechanism. The furnace changing mechanism includes a furnace changing trolley that slides along a guiding 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 holding furnace placed on the furnace changing stations is lifted by a lifting device to achieve furnace changing. The lifting device includes a lifting machine driving motor, which is connected with a first transmission shaft and a second transmission shaft. The first transmission shaft is connected with a third transmission shaft through a transmission box. Lifting turbines are provided on both the second transmission shaft and the third transmission shaft. The scraping knife mechanism includes a fixed cross beam, on which a scraping knife assembly is installed, and a receiving hopper is provided below the scraping knife assembly. The scraping knife assembly includes a scraping knife mounting seat, on which two driving shafts are provided. The two driving shafts are arranged side by side on the scraping knife mounting seat. Scraping knives are provided on the driving shafts. Connecting rods are provided at both ends of the scraping knives. The ends of the connecting rods are connected with a driving device. A connecting rod mounting port is provided on the output shaft of the driving device. The two connecting rods are connected with the output shaft of the driving device in the connecting rod mounting port.

2. The double-station rapid furnace-changing low-pressure casting machine according to claim 1, wherein: The lifting turbine is provided with a lifting rod, and a lifting plate is connected to the lifting rod. The holding furnace is installed on the lifting plate.

3. The double-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 both ends of the lifting plate. A number of guiding columns are provided below the lifting plate, and the guiding columns are located between the two lifting turbines.

4. The double-station rapid furnace-changing low-pressure casting machine according to claim 1, characterized in that: The trolley driving device includes a number of follower wheels and guiding wheels. The follower wheels and guiding wheels are respectively located on both sides of the furnace changing trolley. A moving driving oil cylinder is provided between the follower wheels and the guiding wheels. The guiding wheels are located on the guiding track and rotate under the drive of the moving driving oil cylinder to achieve the movement of the furnace changing trolley.

5. The double-station rapid furnace-changing low-pressure casting machine according to claim 1, wherein: A No. 1 crucible holding furnace and a No. 2 crucible holding furnace are respectively provided on the two furnace changing stations. Both the No. 1 crucible holding furnace and the No. 2 crucible holding furnace are provided with furnace covers, and the furnace covers are provided with temperature measuring thermocouples and riser pipes with liquid-rising nozzles.

6. The double-station rapid furnace-changing low-pressure casting machine according to claim 5, wherein: A drag chain is provided on the furnace changing trolley. The power supply and gas supply of the holding furnace are both connected through the drag chain. The No. 1 crucible holding furnace and the No. 2 crucible holding furnace adopt an independent control heating and independent filling operation mode.

7. The double-station rapid furnace-changing low-pressure casting machine according to claim 1, wherein: The scraping knife is erected on the driving shaft through an adjusting screw.

8. The double-station rapid furnace-changing low-pressure casting machine according to claim 1, characterized in that: Guiding plates are provided on both sides of the receiving hopper, and the receiving hopper is inserted between the two guiding plates.

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