Automatic track sand adding device for molding machine

Abstract

The invention belongs to the technical field of molding machines, and particularly relates to an automatic track sand adding device for a molding machine, comprising: a sand cylinder, the bottom of which is provided with a blanking pipe; the sand pipe is connected with the lower end of the discharging pipe, a fan is fixedly installed at one end of the sand pipe, and sand in the sand cylinder enters the sand pipe through the discharging pipe; one end of the sand pipe is fixedly connected with a corrugated hose capable of bending and extending in any direction, and one end of the corrugated hose is fixedly provided with a sand shooting head; the driving mechanism is used for driving the sand shooting head to move and is mounted on the surface of the sand cylinder; the sand outlet and the air outlet are formed in the sand shooting head, and the filter screen and the baffle are connected into the sand shooting head, so that sand and air flow can be separated, the sand is discharged from the sand outlet, high-pressure air flow is blown out from the air outlet, the speed of the sand sprayed into the sand box is greatly reduced, and the problem that the sand is sprayed to the outside of the sand box is solved.

Description

Technical Field

[0001] The invention relates to the technical field of molding machines, in particular to an automatic track sand adding device for a molding machine. Background Art

[0002] Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. A molding machine is used in the sand casting process. In the foundry industry, a vertical molding machine or a flask molding machine needs to blow high-pressure gas through a sand shooting valve into a sand shooting tube filled with sand before molding. The high-pressure gas in the sand shooting tube drives the sand to be blown into the sand box, and then extrusion molding begins.

[0003] The traditional sand shooting device is a side-shooting sand box fixed on the frame and does not move. The existing sand boxes are generally closed and open. For the closed sand boxes, most of them are side-shooting; and for the open sand boxes, they are generally artificially added with sand or shot from the top of the sand box. The high-pressure gas in the sand shooting valve drives the sand to fill the open sand box. Since the high-pressure airflow drives the sand to move at a high speed, in the process of spraying to the sand box, the sand speed is too fast, and a small amount of sand will be ejected from the outside of the sand box, resulting in a lot of sand scattered within the range of the molding machine, affecting the casting environment. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides an automatic trajectory sand adding device for a molding machine. After the high-pressure gas passes through the sand shooting head, the gas and sand are separated, and the sand speed is reduced, thereby preventing the sand from popping out of the sand box during injection, aiming to solve the problems in the background technology.

[0005] In order to achieve the above technical objectives, the specific technical solutions of the present invention are as follows: an automatic trajectory sand adding device for a molding machine proposed by the present invention includes: a sand barrel, a discharge pipe is provided at the bottom of the sand barrel; a sand pipe, the sand pipe is connected to the lower end of the discharge pipe, and a fan is fixedly installed at one end of the sand pipe, and the sand in the sand barrel enters the sand pipe through the discharge pipe; one end of the sand pipe is fixedly connected to a corrugated hose that can be bent and extended in any direction, and one end of the corrugated hose is fixedly installed with a sand shooting head; a driving mechanism is used to drive the sand shooting head to move, and the driving mechanism is installed on the surface of the sand barrel.

[0006] As a preferred technical solution of the present invention, a feed port is provided at one end of the sand shooting head, the feed port is connected to a corrugated hose, an air outlet is provided at the other end of the sand shooting head, and a sand outlet is provided at the bottom of the sand shooting head; high-pressure gas drives sand into the sand shooting head from the feed port, the sand is discharged from the sand outlet, and the high-pressure gas is blown out from the air outlet.

[0007] As a preferred technical solution of the present invention, a filter is fixedly installed inside the sand shooting head for filtering sand; the filter is arranged between the sand outlet and the air outlet; wherein, the sand blocked by the filter is discharged from the sand outlet, and a movable baffle is connected to the inside of the sand shooting head, and the baffle is arranged between the filter and the air outlet, and the baffle is used to intercept the sand passing through the filter; wherein, the lower end of the baffle is in contact with the bottom of the sand shooting head, and space is left between the upper end of the baffle and the top of the sand shooting head.

[0008] As an optimal technical solution of the present invention, the sandblasting head is internally rotatably connected to a shaft, one end of which is fixedly connected to a fan blade. When high-pressure gas flows, the fan blade is driven to rotate, and the other end of the shaft is fixedly connected to a track ring.

[0009] As a preferred technical solution of the present invention, the surface of the track ring is evenly provided with multiple protrusions along its circumference, the baffle is fixedly connected to a roller that cooperates with the track ring, and an elastic part is fixedly connected between the baffle and the inner wall of the sand shooting head. When the roller rolls on the surface of the track ring, it drives the baffle to move back and forth; an auxiliary sand channel is provided at the bottom of the sand shooting head, and the auxiliary sand channel is connected to the sand outlet, and the sand intercepted by the baffle enters the sand outlet from the auxiliary sand channel.

[0010] As a preferred technical solution of the present invention, the inner wall of the sand-shooting head is rotatably connected to a knocking frame, one end of the knocking frame is fixedly connected to a knocking head, which is used to knock and vibrate the filter screen to shake off the sand on the filter screen, and a tension spring is fixedly connected between the knocking frame and the inner wall of the sand-shooting head; the circumferential surface of the track is evenly fixedly connected to multiple sections of inclined rails, and the knocking frame is fixedly connected to a limit frame that cooperates with the inclined rails.

[0011] As an optimal technical solution of the present invention, a rotating shaft is rotatably connected in the discharge pipe, and a spiral blade is provided on the surface of the rotating shaft, which is used to drive the sand in the sand barrel to flow into the sand pipe, and a turbine blade is fixedly installed at one end of the rotating shaft. The turbine blade is arranged in the sand pipe, and the high-pressure airflow in the sand pipe can drive the turbine blade to rotate.

[0012] As a preferred technical solution of the present invention, the driving mechanism includes a connecting frame, a sliding hole is provided on the connecting frame, a sliding frame is slidably connected to the sliding hole, and a driving motor is installed at one end of the connecting frame, a screw rod is connected to the driving motor, and the screw rod is threadedly connected to the sliding frame; a rotating motor is installed on the sliding frame, a rotating motor is connected to a rotating rod, the lower end of the rotating rod is vertically fixedly connected to the rotating rod, and a sand shooting head is rotatably connected at one end of the rotating rod.

[0013] The beneficial effects of the present invention are: 1. The present invention provides a sand outlet and an air outlet on the sand shooting head, and connects a filter screen and a baffle inside the sand shooting head to separate the sand and the airflow, so that the sand is discharged from the sand outlet and the high-pressure airflow is blown out from the air outlet, thereby greatly reducing the speed of the sand when it is ejected into the sand box, solving the problem of sand being ejected outside the sand box.

[0014] 2. The present invention provides a track ring inside the sand shooting head. When the track ring rotates, it drives the knocking frame to repeatedly knock on the filter screen, so that the sand on the surface of the filter screen is shaken off, avoiding the problem of blockage of the filter screen and causing air flow obstruction. When the track ring rotates, it can drive the baffle to move back and forth, pushing the intercepted sand into the auxiliary, and finally discharging the material from the sand outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of an automatic trajectory sand adding device for a molding machine proposed by the present invention.

[0016] Figure 2 This is a front view schematic diagram of an automatic trajectory sand adding device for a molding machine proposed by the present invention.

[0017] Figure 3 This is a schematic diagram of the internal structure of the sand barrel proposed in the present invention.

[0018] Figure 4 This is a schematic structural diagram of the sand-blasting head proposed in the present invention.

[0019] Figure 5 This is a schematic diagram of the internal structure of the sandblasting head proposed in the present invention.

[0020] Figure 6 for Figure 5 A partial enlarged view of point A in the middle.

[0021] Figure 7 This is a schematic structural diagram of the driving mechanism proposed in the present invention.

[0022] In the figure: 1. sand cylinder; 101. feed pipe; 102. spiral blade; 103. rotating shaft; 104. turbine blade; 2. sand pipe; 3. sand shooting head; 301. feed inlet; 302. air outlet; 303. sand outlet; 304. auxiliary sand channel; 305. filter screen; 306. baffle; 307. shaft; 308. fan blade; 309. elastic member; 310. track ring; 311. convex part; 312. roller; 313. knocking frame; 314. limit frame; 315. knocking head; 316. inclined rail; 317. tension spring; 4. driving mechanism; 41. connecting frame; 42. screw rod; 43. sliding frame; 44. driving motor; 45. rotating motor; 46. rotating rod; 47. rotating rod; 48. sliding hole; 5. fan; 6. corrugated hose DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Embodiment: This embodiment discloses an automatic track sand adding device for a molding machine, such as Figure 1-Figure 7 As shown, it includes: a sand barrel 1, a discharge pipe 101 is provided at the bottom of the sand barrel 1; a sand pipe 2, the sand pipe 2 is connected to the lower end of the discharge pipe 101, and a fan 5 is fixedly installed at one end of the sand pipe 2, the fan 5 blows high-pressure gas into the sand pipe 2, and the sand in the sand barrel 1 enters the sand pipe 2 through the discharge pipe 101, and the high-pressure gas drives the sand to flow in the sand pipe 2; one end of the sand pipe 2 is fixedly connected to a corrugated hose 6 that can be bent and extended in any direction, and one end of the corrugated hose 6 is fixedly installed with a sand shooting head 3, and sand is ejected from the sand shooting head 3; a driving mechanism 4 is used to drive the sand shooting head 3 to move, and the driving mechanism 4 is installed on the surface of the sand barrel 1.

[0025] like Figure 3 As shown, a rotating shaft 103 is rotatably connected in the discharge pipe 101, and a spiral blade 102 is provided on the surface of the rotating shaft 103, which is used to drive the sand in the sand cylinder 1 to flow into the sand pipe 2, and a turbine blade 104 is fixedly installed at one end of the rotating shaft 103. The turbine blade 104 is provided in the sand pipe 2, and the high-pressure airflow in the sand pipe 2 can drive the turbine blade 104 to rotate; when the fan 5 blows air into the sand pipe 2, it drives the turbine blade 104 to rotate, drives the spiral blade 102 to rotate, and then drives the sand in the sand cylinder 1 to fall from the discharge pipe 101 into the sand pipe 2, and when the spiral blade 102 rotates, the sand will not fall from the discharge pipe 101 into the sand pipe 2.

[0026] like Figure 4-Figure 6As shown, a feed port 301 is provided at one end of the sand shooting head 3, and the feed port 301 is connected to the corrugated hose 6, and high-pressure gas drives the sand into the sand shooting head 3 from the feed port 301, and an air outlet 302 is provided at the other end of the sand shooting head 3, and a sand outlet 303 is provided at the bottom of the sand shooting head 3. The high-pressure gas entrains the sand into the sand shooting head 3 and separates, and the gas is blown out from the air outlet 302, and the sand is discharged from the sand outlet 303; a filter screen 305 is fixedly installed inside the sand shooting head 3 for filtering the sand; the filter screen 305 is arranged between the sand outlet 303 and the air outlet 302; wherein, the sand blocked by the filter screen 305 is discharged from the sand outlet 303, and a movable baffle 306 is connected to the inside of the sand shooting head 3, and the baffle 306 is arranged between the filter screen 305 and the air outlet 302. Since there will be very little sand passing through the filter screen 305, the baffle 306 is used to filter the sand passing through the filter screen 305; wherein, the lower end of the baffle 306 contacts the bottom of the sand shooting head 3, and a space is left between the upper end of the baffle 306 and the top of the sand shooting head 3, and the high-pressure air flow flows through the upper end of the baffle 306, and the filtering part of the filter screen 305 is flush with the baffle 306 to prevent the sand from passing through the filter screen 305 and then passing through the upper end of the baffle 306; the high-pressure gas entrained in sand enters the sand shooting head 3 from the feed inlet 301 and hits the filter screen 305 head-on, and the filter screen 305 intercepts a large amount of sand, and the intercepted sand falls and is discharged from the sand outlet 303. The gas passes through the filter screen 305 and is blown out from the air outlet 302. A small amount of fine sand with a small particle diameter passes through the filter screen 305 and is directly intercepted by the baffle 306, and falls between the baffle 306 and the filter screen 305; wherein, the high-pressure gas flows through the upper end of the baffle 306 and is finally blown out from the air outlet 302.

[0027] Among them, the sandblasting head 3 is rotatably connected to the shaft 307 inside, the shaft 307 is arranged horizontally, and one end of the shaft 307 is fixedly connected to the fan blade 308. When the high-pressure gas flows, the fan blade 308 is driven to rotate. The fan blade 308 can be arranged in the air outlet 302, and the other end of the shaft 307 is fixedly connected to the track ring 310; the surface of the track ring 310 is evenly provided with a plurality of protrusions 311 along its circumference, and the baffle 306 is fixedly connected to a roller 312 that cooperates with the track ring 310, and an elastic member is fixedly connected between the baffle 306 and the inner wall of the sandblasting head 3 309, the elastic member 309 can be a spring to apply elastic force to the baffle 306. When the roller 312 rolls on the surface of the track ring 310, the roller 312 continuously passes the position of the convex portion 311, which will drive the baffle 306 to move back and forth; an auxiliary sand channel 304 is provided at the bottom of the sand shooting head 3, and the auxiliary sand channel 304 is connected to the sand outlet 303. The sand intercepted by the baffle 306 enters the sand outlet 303 from the auxiliary sand channel 304; when the baffle 306 moves back and forth, the intercepted sand is pushed into the auxiliary sand channel 304, and the sand is finally discharged from the sand outlet 303 and transported to the sand box.

[0028] Preferably, the inner wall of the sand-shooting head 3 is rotatably connected to a knocking frame 313, and two knocking frames 313 can be provided. One end of the knocking frame 313 is fixedly connected to a knocking head 315 for knocking and vibrating the filter screen 305 to shake off the sand on the filter screen 305, and a tension spring 317 is fixedly connected between the knocking frame 313 and the inner wall of the sand-shooting head 3, and the tension spring 317 applies tension to the knocking frame 313 so that the knocking head 315 keeps in contact with the surface of the filter screen 305; the circumference of the track ring 310 is evenly fixedly connected to multiple sections of inclined rails 316, and the knocking frame 313 is fixedly connected to the inclined rails 3 16 cooperates with the limit frame 314. When the track ring 310 rotates, the distance between the inclined rail 316 and the limit frame 314 gradually increases, and the limit frame 314 contacts the inclined rail 316. As the track ring 310 rotates, the inclined rail 316 drives the knocking frame 313 to move away from the filter screen 305. When the inclined rail 316 is separated from the knocking frame 313, the knocking frame 313 hits the filter screen 305 under the tension of the tension spring 317, knocking and vibrating the filter screen 305, and shaking off the sand on the filter screen 305, thereby avoiding the problem that the filter screen 305 is blocked by sand and the gas cannot pass through.

[0029] like Figure 7 As shown, the driving mechanism 4 includes a connecting frame 41, which is fixedly connected to the sand barrel 1, and a sliding hole 48 is provided on the connecting frame 41, and a sliding frame 43 is slidably connected to the sliding hole 48, and a driving motor 44 is installed at one end of the connecting frame 41, and a screw rod 42 is connected to the driving motor 44, and the screw rod 42 is threadedly connected to the sliding frame 43; a rotating motor 45 is installed on the sliding frame 43, and a rotating rod 46 is connected to the rotating motor 45, and the lower end of the rotating rod 46 is vertically fixedly connected to the rotating rod 47, and one end of the rotating rod 47 is rotatably connected to the sand shooting head 3; the screw rod 42 is driven to rotate by the driving motor 44, and then the sliding frame 43 can be driven to slide on the connecting frame 41, thereby changing the position of the sand shooting head 3, and the rotating rod 46 is driven to rotate by the rotating motor 45, and the rotating rod 47 is driven to rotate, thereby changing the direction of the sand shooting head 3.

[0030] During operation: when the fan 5 blows air into the sand pipe 2, it drives the turbine blades 104 to rotate, drives the spiral blades 102 to rotate, and then drives the sand in the sand tube 1 to fall from the discharge pipe 101 into the sand pipe 2, and enters the sand shooting head 3 through the corrugated hose 6. The high-pressure gas entrained with sand enters the sand shooting head 3 from the feed inlet 301 and hits the filter 305. The filter 305 intercepts a large amount of sand, and the intercepted sand falls and is discharged from the sand outlet 303. A large amount of gas passes through the filter 305 and is blown out from the air outlet 302. A small amount of fine sand with small particles passes through the filter 305 and is directly intercepted by the baffle 306 and falls on the baffle 30 6 and the filter screen 305, the high-pressure gas flows through the upper end of the baffle 306, and is finally blown out from the air outlet 302, driving the shaft 307 to rotate, and then driving the track ring 310 to rotate; driving the roller 312 to roll on the surface of the track ring 310, and the roller 312 continuously passes the position of the convex portion 311, which will drive the baffle 306 to move back and forth, pushing the intercepted sand into the auxiliary sand channel 304, and the sand is finally discharged from the sand outlet 303 and transported to the sand box. The sand shooting head of this embodiment greatly reduces the speed of the sand entering the sand box by separating the high-pressure gas from the sand, thereby avoiding the problem of the sand being ejected from the outside of the sand box due to excessive speed.

[0031] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An automatic track sand adding device for a molding machine, characterized in that: include: A sand cylinder (1), wherein a feed pipe (101) is provided at the bottom of the sand cylinder (1); A sand pipe (2), the sand pipe (2) is connected to the lower end of the feed pipe (101), and a fan (5) is fixedly installed at one end of the sand pipe (2), and the sand in the sand cylinder (1) enters the sand pipe (2) through the feed pipe (101); One end of the sand pipe (2) is fixedly connected to a corrugated hose (6) that can be bent and extended in any direction, and one end of the corrugated hose (6) is fixedly mounted with a sand shooting head (3); The driving mechanism (4) is used to drive the sand-shooting head (3) to move, and the driving mechanism (4) is installed on the surface of the sand cylinder (1).

2. The automatic track sand adding device for a molding machine according to claim 1, characterized in that: The sand-shooting head (3) is provided with a feed inlet (301) at one end, the feed inlet (301) being connected to a corrugated hose (6), an air outlet (302) being provided at the other end of the sand-shooting head (3), and a sand outlet (303) being provided at the bottom of the sand-shooting head (3); high-pressure gas drives sand to enter the interior of the sand-shooting head (3) from the feed inlet (301), the sand is discharged from the sand outlet (303), and the high-pressure gas is blown out from the air outlet (302).

3. The automatic track sand adding device for a molding machine according to claim 2, characterized in that: A filter screen (305) is fixedly installed inside the sand shooting head (3) for filtering sand; the filter screen (305) is arranged between the sand outlet (303) and the air outlet (302); wherein the sand blocked by the filter screen (305) is discharged from the sand outlet (303); and a movable baffle (306) is connected inside the sand shooting head (3); the baffle (306) is arranged between the filter screen (305) and the air outlet (302); the baffle (306) is used to intercept the sand passing through the filter screen (305); wherein the lower end of the baffle (306) contacts the bottom of the sand shooting head (3), and a space is left between the upper end of the baffle (306) and the top of the sand shooting head (3).

4. The automatic track sand adding device for a molding machine according to claim 3, characterized in that: The sand blasting head (3) is internally rotatably connected to a shaft rod (307), one end of the shaft rod (307) is fixedly connected to a fan blade (308), and when high-pressure gas flows, the fan blade (308) is driven to rotate, and the other end of the shaft rod (307) is fixedly connected to a track ring (310).

5. The automatic track sand adding device for a molding machine according to claim 4, characterized in that: The surface of the track ring (310) is evenly provided with a plurality of convex portions (311) along its circumference; a roller (312) cooperating with the track ring (310) is fixedly connected to the baffle plate (306); and an elastic member (309) is fixedly connected between the baffle plate (306) and the inner wall of the sand-shooting head (3); when the roller (312) rolls on the surface of the track ring (310), it drives the baffle plate (306) to move back and forth; an auxiliary sand channel (304) is provided at the bottom of the sand-shooting head (3); the auxiliary sand channel (304) is connected to the sand outlet (303); and the sand intercepted by the baffle plate (306) enters the sand outlet (303) from the auxiliary sand channel (304).

6. The automatic track sand adding device for a molding machine according to claim 4, characterized in that: The inner wall of the sand-shooting head (3) is rotatably connected to a knocking frame (313), one end of the knocking frame (313) is fixedly connected to a knocking head (315) for knocking and vibrating the filter screen (305) to shake off the sand on the filter screen (305), and a tension spring (317) is fixedly connected between the knocking frame (313) and the inner wall of the sand-shooting head (3); a plurality of inclined rails (316) are evenly and fixedly connected to the circumference of the track ring (310), and a limit frame (314) matched with the inclined rails (316) is fixedly connected to the knocking frame (313).

7. The automatic track sand adding device for a molding machine according to claim 6, characterized in that: A rotating shaft (103) is rotatably connected inside the feed pipe (101), and a spiral blade (102) is provided on the surface of the rotating shaft (103) for driving the sand in the sand cylinder (1) to flow into the sand pipe (2). A turbine blade (104) is fixedly mounted on one end of the rotating shaft (103), and the turbine blade (104) is arranged in the sand pipe (2). The high-pressure airflow in the sand pipe (2) can drive the turbine blade (104) to rotate.

8. The automatic track sand adding device for a molding machine according to claim 7, characterized in that: The driving mechanism (4) comprises a connecting frame (41), the connecting frame (41) is provided with a sliding hole (48), a sliding frame (43) is slidably connected to the sliding hole (48), and a driving motor (44) is installed at one end of the connecting frame (41), a screw rod (42) is connected to the driving motor (44), and the screw rod (42) is threadedly connected to the sliding frame (43); a rotating motor (45) is installed on the sliding frame (43), a rotating rod (46) is connected to the rotating motor (45), a rotating rod (47) is vertically fixedly connected to the lower end of the rotating rod (46), and one end of the rotating rod (47) is rotatably connected to the sandblasting head (3).

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