Automatic sand mixing device for casting

Abstract

The invention discloses an automatic sand mixing device for casting, and relates to the technical field of casting, the automatic sand mixing device for casting comprises a sand pouring mechanism and a sand mixing mechanism, the sand pouring mechanism comprises a sand containing barrel and a double-head motor, the sand containing barrel is used for containing casting sand needing to be mixed, and the space posture of the sand containing barrel is electrically adjusted through the double-head motor; the mixed foundry sand is automatically poured out; the sand mixing mechanism is arranged on the inner side of the sand containing barrel and comprises a plurality of sand shoveling plates and a hydraulic cylinder, the sand shoveling plates are arranged on the inner side of the sand containing barrel in a circular array mode, the hydraulic cylinder drives the sand shoveling plates to shovel casting sand at the bottom of the barrel, and then the shoveled casting sand is scattered into the barrel through scattering holes in the sand shoveling plates. And the foundry sand in the sand discharging barrel is uniformly mixed. Compared with the prior art, the mixing and dispersing capacity of the casting sand added with water is high, the wet casting sand is not prone to being bonded and agglomerated, the mixing uniformity of the wet casting sand is good, and the quality of a cast casting product is good.

Description

Technical Field

[0001] The invention relates to the technical field of casting, and in particular to an automatic sand mixing device for casting. Background Art

[0002] Foundry sand is a granular refractory material used to prepare molding sand and core sand in foundry production. When clay is used as a molding sand binder, about 1 ton of new sand is needed to produce 1 ton of qualified castings. Therefore, the amount of foundry sand used in sand casting production is the largest. Therefore, in actual production, automatic mixing equipment is used to improve the efficiency and automation level of the foundry production line to ensure uniform mixing and performance consistency of the foundry sand.

[0003] The main components of foundry sand include basic sand (natural sand or artificial sand) and auxiliary additives (binder, refractory material, hardener, foaming agent, loosening agent, etc.). However, the existing spiral stirring structure has limited dispersion ability for foundry sand after adding water, and it is easy to stick together into a mass. The humidity in the center of the sand mass is high, and the humidity on the surface of the sand mass is low. When used, these foundry sands containing sand masses will affect the quality of casting products. Summary of the invention

[0004] The object of the present invention is to provide an automatic sand mixing device for casting to solve the above-mentioned defects caused by the prior art.

[0005] An automatic sand mixing device for casting, comprising a sand pouring mechanism and a sand mixing mechanism, wherein:

[0006] The sand pouring mechanism comprises a sand placing bucket and a double-headed motor. The sand placing bucket is used to hold the foundry sand that needs to be mixed. The double-headed motor is used to electrically adjust the spatial posture of the sand placing bucket and automatically pour out the mixed foundry sand.

[0007] The sand mixing mechanism is arranged on the inner side of the sand placing bucket and includes a sand shoveling plate and a hydraulic cylinder. The sand shoveling plates are provided with a plurality of plates and are arranged in a circular array on the inner side of the sand placing bucket. The sand shoveling plates are driven by the hydraulic cylinder to shovel up the foundry sand at the bottom of the bucket, and then the shoveled foundry sand is dispersed and thrown into the bucket through the dispersion holes on the sand shoveling plates, and the foundry sand in the sand placing bucket is evenly mixed.

[0008] Preferably, a "U"-shaped support frame is provided below the sand discharge bucket, and a number of casters are evenly connected to the bottom of the support frame. A double-headed motor is horizontally installed in the middle of the support frame. A pair of drive shafts are symmetrically connected to the left and right sides of the support frame, and the inner ends of this pair of drive shafts are connected to the two output ends of the double-headed motor through couplings. A pulley one is key-connected to the outer end of the drive shaft. A pair of support shafts are symmetrically connected to the left and right sides of the sand discharge bucket, and this pair of support shafts are rotatably connected to both ends of the support frame. A pulley two is key-connected to the outer end of the support shaft, and a belt one is connected between the pulley one and the pulley two on the same side.

[0009] Preferably, an X-shaped mounting frame is coaxially connected inside the sand discharge bucket. A spline tube is rotatably connected to the center of the mounting frame, and a hollow spline shaft is slidably connected to the inner side of the spline tube. The lower end of the spline shaft is coaxially connected with a mounting sleeve, and a number of Y-shaped hinge frames are evenly hinged around the mounting sleeve. A number of shoveling plates are provided and are correspondingly connected to the outer ends of the respective hinge frames. A number of dispersion holes are evenly distributed on the shoveling plates. An X-shaped movable frame is rotatably connected to the spline shaft above the mounting sleeve. Mounting shafts are vertically connected to each end of the movable frame, and movable sleeves are rotatably connected to each end of the mounting frame. And a sliding connection is provided between the mounting shaft and the movable sleeve on the same side. A compression spring one is sleeved between the mounting shaft between the mounting frame and the movable frame. A connecting plate is provided parallel to the upper part of the mounting frame, and a number of connecting columns are evenly connected between the connecting plate and the mounting frame. A hydraulic cylinder is vertically installed downward at the center of the connecting plate, and a connecting block is connected to the end of the piston rod of the hydraulic cylinder. A number of steel wires are connected to the connecting block. A connecting bar is vertically connected to the middle of each hinge frame, and the lower end of each steel wire is correspondingly connected to the lower end of each connecting bar. A compression spring two is sleeved between the steel wire between the connecting bar and the mounting sleeve, and the elastic coefficient of the compression spring two is smaller than that of the compression spring one.

[0010] Preferably, an inclined material guiding plate is provided below the sand discharge bucket, and the material guiding plate is installed on the support frame through a pair of support frames.

[0011] Preferably, spiral mounting grooves are symmetrically provided at the center on the side wall of the mounting shaft, a pair of movable blocks are symmetrically connected to the inner wall of the movable sleeve at the center, a pulley three is key-connected to the upper end of the spline tube, a pulley four is key-connected to the upper end of the movable sleeve, and a belt two is commonly connected between all the pulley threes and the pulley fours. A number of pairs of limit columns are evenly distributed around the pulley three on the mounting frame.

[0012] Preferably, a fixing plate is horizontally welded to the top of the shoveling plate, and a vibration motor is installed on the upper side of the fixing plate.

[0013] Preferably, atomizing nozzles are evenly distributed around the mounting frame, the atomizing nozzles are vertically mounted downward on the mounting frame through mounting bars, and the upper ends of the atomizing nozzles are connected to water inlet pipes.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The present invention has a strong ability to mix and disperse the foundry sand after adding water, and is not easy to make the wet foundry sand stick together into a mass. The mixing uniformity of the wet foundry sand is good, so that the quality of the cast casting product is better.

[0016] 2. The present invention contracts the piston rod of the hydraulic cylinder and drives the steel wire rope to contract upward. Under the pulling of the steel wire rope, the surrounding hinged frames deflect downward together and drive the surrounding sand shoveling plates to gather together, thereby shoveling up the foundry sand at the bottom of the sand placing bucket. Under the continued pulling of the steel wire rope, the gathered sand shoveling plates move upward with the shoveled foundry sand, and the shoveled foundry sand is then dispersed and scattered into the sand placing bucket through the dispersion holes on the sand shoveling plates, thereby achieving uniform mixing of the foundry sand in the sand placing bucket.

[0017] 3. When relative axial movement occurs between the mounting shaft and the movable sleeve, the movable block on the movable sleeve and the mounting groove on the mounting shaft slide relative to each other, thereby pushing the movable sleeve to rotate clockwise / counterclockwise, and then driving the spline tube and the spline shaft to rotate clockwise / counterclockwise through the belt transmission, and finally driving the surrounding sand shovel plates to rotate clockwise / counterclockwise, so as to achieve uniform dispersion of the foundry sand in the sand bucket. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the overall side view of the present invention.

[0019] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0020] Figure 3 It is a structural schematic diagram of the overall sand pouring mechanism from the first perspective.

[0021] Figure 4 It is a structural schematic diagram of the overall sand pouring mechanism from the second perspective.

[0022] Figure 5 It is a structural schematic diagram of the overall sand mixing mechanism from the first perspective.

[0023] Figure 6 It is a structural schematic diagram of the overall sand mixing mechanism from the second perspective.

[0024] Figure 7 This is a structural schematic diagram of a local explosion of the sand mixing mechanism.

[0025] in:

[0026] 10-sand pouring mechanism; 101-sand placing bucket; 102-support frame; 103-Foma wheel; 104-double-head motor; 105-driving shaft; 106-coupling; 107-pulley 1; 108-support shaft; 109-pulley 2; 110-belt 1; 111-material guide plate; 112-support frame;

[0027] 20-sand mixing mechanism; 201-mounting frame; 202-spline tube; 203-spline shaft; 204-mounting sleeve; 205-articulated frame; 206-sand shoveling plate; 206a-dispersion hole; 207-fixed plate; 208-vibration motor; 209-movable frame; 210-mounting shaft; 210a-mounting slot; 211-movable sleeve; 212-movable block; 213-compression spring one; 214-pulley three; 215-pulley four; 216-belt two; 217-limiting column; 218-connecting plate; 219-connecting column; 220-hydraulic cylinder; 221-connecting block; 222-wire rope; 223-connecting strip; 224-compression spring two; 225-atomizing nozzle; 226-mounting strip; 227-water inlet pipe. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0029] like Figures 1 to 7 As shown, an automatic sand mixing device for casting includes a sand pouring mechanism 10 and a sand mixing mechanism 20, wherein:

[0030] The sand pouring mechanism 10 includes a sand placing bucket 101 and a double-headed motor 104. The sand placing bucket 101 is used to hold the foundry sand that needs to be mixed. The double-headed motor 104 electrically adjusts the spatial posture of the sand placing bucket 101 and automatically pours out the mixed foundry sand.

[0031] The sand mixing mechanism 20 is arranged on the inner side of the sand placing bucket 101 and includes a sand shoveling plate 206 and a hydraulic cylinder 220. The sand shoveling plates 206 are provided in a plurality and arranged in a circular array on the inner side of the sand placing bucket 101. The hydraulic cylinder 220 drives the sand shoveling plates 206 to scoop up the foundry sand at the bottom of the bucket, and then the scooped foundry sand is dispersed and thrown into the bucket through the dispersion holes 206a on the sand shoveling plates 206, and the foundry sand in the sand placing bucket 101 is evenly mixed.

[0032] In this embodiment, a "U"-shaped support frame 102 is provided below the sand discharging bucket 101, and a plurality of casters 103 are evenly connected to the bottom of the support frame 102. A double-headed motor 104 is horizontally installed in the middle of the support frame 102. A pair of drive shafts 105 are symmetrically connected to the left and right sides of the support frame 102, and the inner ends of this pair of drive shafts 105 are connected to the two output ends of the double-headed motor 104 through couplings 106. A pulley one 107 is key-connected to the outer end of the drive shaft 105. A pair of support shafts 108 are symmetrically connected to the left and right sides of the sand discharging bucket 101, and this pair of support shafts 108 are rotatably connected to both ends of the support frame 102. A pulley two 109 is key-connected to the outer end of the support shaft 108, and a belt one 110 is connected between the pulley one 107 and the pulley two 109 on the same side. The support frame 102 can be stably supported by these casters 103. After belt transmission by the double-headed motor 104, the sand discharging bucket 101 is driven to deflect and adjust the spatial attitude of the sand discharging bucket 101, so as to automatically pour out the mixed casting sand.

[0033] In this embodiment, the interior of the sand placing bucket 101 is coaxially connected with an X-shaped mounting frame 201, the center of the mounting frame 201 is rotatably connected with a spline tube 202, and a hollow spline shaft 203 is slidably connected to the inner side of the spline tube 202, the lower end of the spline shaft 203 is coaxially connected with a mounting sleeve 204, and a plurality of Y-shaped articulated frames 205 are evenly hinged around the mounting sleeve 204, the sand shoveling plate 206 is provided with a plurality of and correspondingly connected to the outer ends of each articulated frame 205, the sand shoveling plate 206 is evenly distributed with a plurality of dispersed holes 206a, the spline shaft 203 is rotatably connected with an X-shaped movable frame 209 above the mounting sleeve 204, each end of the movable frame 209 is vertically connected with a mounting shaft 210, each end of the mounting frame 201 is rotatably connected with a movable sleeve 211, and the mounting shaft 210 on the same side and the movable sleeve 211 are connected to each other. The movable sleeve 211 is slidably connected between the movable sleeve 211, the mounting shaft 210 is provided with a compression spring 1 213 between the mounting frame 201 and the movable frame 209, a connecting plate 218 is provided in parallel directly above the mounting frame 201, and a plurality of connecting columns 219 are evenly connected between the connecting plate 218 and the mounting frame 201, the hydraulic cylinder 220 is vertically installed at the center of the connecting plate 218, and a connecting block 221 is connected to the end of the piston rod of the hydraulic cylinder 220, and a plurality of steel wire ropes 222 are connected to the connecting block 221, and a connecting strip 223 is vertically connected to the middle of each articulated frame 205, and the lower end of each steel wire rope 222 is correspondingly connected to the lower end of each connecting strip 223, and the steel wire rope 222 is provided with a compression spring 224 between the connecting strip 223 and the mounting sleeve 204, and the elastic coefficient of the compression spring 224 is less than the elastic coefficient of the compression spring 1 213. The piston rod of the hydraulic cylinder 220 contracts and drives the steel wire rope 222 to contract upward. Under the pull of the steel wire rope 222, the surrounding articulated frames 205 deflect downward together and drive the surrounding sand shoveling plates 206 to gather together, thereby shoveling the foundry sand at the bottom of the sand bucket 101. Under the continued pull of the steel wire rope 222, the gathered sand shoveling plates 101 move upward with the shoveled foundry sand, and the shoveled foundry sand is then scattered into the sand bucket 101 through the dispersion holes 206a on the sand shoveling plates 206, so as to achieve uniform mixing of the foundry sand in the sand bucket 101. The piston rod of the hydraulic cylinder 220 extends and drives the steel wire rope 222 to be released downward. At the same time, under the joint action of the compression spring 1 213 and the compression spring 2 24, the sand shoveling plates 206 return to the initial state.

[0034] In this embodiment, an inclined guide plate 111 is provided below the sand placing bucket 101, and the guide plate 111 is mounted on the support frame 102 through a pair of support frames 112. The foundry sand poured out of the sand placing bucket 101 is discharged after being guided by the guide plate 111 to avoid falling onto the heat sink of the double-headed motor 104.

[0035] In this embodiment, a spiral installation groove 210a is centrally symmetrically provided on the side wall of the installation shaft 210, a pair of movable blocks 212 are centrally symmetrically connected to the inner wall of the movable sleeve 211, the upper end key of the spline tube 202 is connected to the pulley 3 214, the upper end key of the movable sleeve 211 is connected to the pulley 4 215, all the pulleys 3 214 and the pulleys 4 215 are commonly connected to the belt 2 216, and the mounting frame 201 is evenly distributed with a plurality of pairs of limit posts 217 around the pulley 3 214. When the installation shaft 210 moves upward, the movable block 212 on the movable sleeve 211 slides relative to the installation groove 210a on the installation shaft 210, thereby pushing the movable sleeve 211 to rotate clockwise, and then driving the spline tube 202 and the spline shaft 203 to rotate clockwise through the belt transmission, and finally driving the surrounding sand shoveling plate 206 to rotate clockwise. When the installation shaft 210 moves downward, the movable block 212 on the movable sleeve 211 slides relative to the installation groove 210a on the installation shaft 210, thereby pushing the movable sleeve 211 to rotate counterclockwise, and then driving the spline tube 202 and the spline shaft 203 to rotate counterclockwise through the belt transmission, and finally driving the surrounding sand scraping plate 206 to rotate counterclockwise. The above-mentioned movement form can realize uniform dispersion of the foundry sand in the sand bucket 101.

[0036] In this embodiment, a fixing plate 207 is horizontally welded to the top of the sand scraping plate 206, and a vibration motor 208 is installed on the upper side of the fixing plate 207. The vibration motor 208 allows the sand scraping plate 206 to generate high-frequency vibration and helps to shake off the foundry sand on the sand scraping plate 206.

[0037] In this embodiment, atomizing nozzles 225 are evenly distributed around the mounting frame 201. The atomizing nozzles 225 are vertically mounted downward on the mounting frame 201 through mounting strips 226, and a water inlet pipe 227 is connected to the upper end of the atomizing nozzle 225. High-pressure water is introduced into the atomizing nozzle 225 through the water inlet pipe 227, and then evenly sprayed into the sand placing bucket 101 after atomization by the atomizing nozzle 225, which can not only replenish the moisture during sand mixing, but also suppress dust during sand mixing.

[0038] The working principle of this automatic sand mixing device for casting:

[0039] S1: Put the well-proportioned foundry sand into the sand bucket 101;

[0040] S2: The piston rod of the hydraulic cylinder 220 contracts and drives the wire rope 222 to contract upward. Under the pull of the wire rope 222, the surrounding articulated frames 205 deflect downward together and drive the surrounding sand shoveling plates 206 to gather together, thereby shoveling up the foundry sand at the bottom of the sand placing bucket 101. Under the continuous pull of the wire rope 222, the gathered sand shoveling plates 101 move upward with the shoveled foundry sand, and the shoveled foundry sand is then dispersed and thrown to the sand placing bucket through the dispersion holes 206a on the sand shoveling plates 206. In the sand bucket 101, the foundry sand in the sand bucket 101 is mixed. In addition, when the installation shaft 210 moves upward, the movable block 212 on the movable sleeve 211 slides relatively with the installation groove 210a on the installation shaft 210, thereby pushing the movable sleeve 211 to rotate clockwise, and then driving the spline tube 202 and the spline shaft 203 to rotate clockwise through the belt transmission, and finally driving the surrounding sand shoveling plate 206 to rotate clockwise, thereby dispersing the foundry sand in the sand bucket 101;

[0041] S3: The piston rod of the hydraulic cylinder 220 is extended and drives the wire rope 222 to be released downward. At the same time, under the joint action of the compression spring 1 213 and the compression spring 224, the sand shoveling plate 206 returns to the initial state. In addition, when the installation shaft 210 moves downward, the movable block 212 on the movable sleeve 211 slides relative to the installation groove 210a on the installation shaft 210, thereby pushing the movable sleeve 211 to rotate counterclockwise, and then drives the spline tube 202 and the spline shaft 203 to rotate counterclockwise through the belt transmission, and finally drives the surrounding sand shoveling plates 206 to rotate counterclockwise, so as to disperse the foundry sand in the sand bucket 101;

[0042] S4: cyclically executing S2 to S3 to achieve uniform mixing of the foundry sand in the sand placing bucket 101. Meanwhile, during the mixing period, the high-pressure water flow is evenly sprayed into the sand placing bucket 101 after being atomized by the atomizing nozzle 225;

[0043] S5: The double-headed motor 104 drives the sand placing bucket 101 to deflect, and the mixed foundry sand is automatically poured out.

[0044] Therefore, the embodiments disclosed above are only illustrative in all aspects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. An automatic sand preparation device for casting, characterized in that: It includes a sand pouring mechanism (10) and a sand mixing mechanism (20), where: The sand pouring mechanism (10) includes a sand discharging bucket (101) and a double-headed motor (104). The sand discharging bucket (101) is used to hold the casting sand to be mixed. The spatial attitude of the sand discharging bucket (101) is electrically adjusted by the double-headed motor (104), and the mixed casting sand is automatically poured out. The sand mixing mechanism (20) is arranged inside the sand discharging bucket (101) and includes a sand shoveling plate (206) and a hydraulic cylinder (220). There are several sand shoveling plates (206) which are circularly arrayed inside the sand discharging bucket (101). The hydraulic cylinder (220) drives these sand shoveling plates (206) to shovel up the casting sand at the bottom of the bucket, and then the shoveled casting sand is dispersed and scattered into the bucket through the dispersion holes (206a) on the sand shoveling plates (206), and the casting sand in the sand discharging bucket (101) is evenly mixed.

2. The automatic sand preparation device for casting according to claim 1, characterized in that: A "U"-shaped support frame (102) is provided below the sand discharging bucket (101), and several casters (103) are evenly connected to the bottom of the support frame (102). A double-headed motor (104) is horizontally installed in the middle of the support frame (102). A pair of drive shafts (105) are symmetrically connected to the left and right sides of the support frame (102), and the inner ends of this pair of drive shafts (105) are connected to the two output ends of the double-headed motor (104) through couplings (106). A pulley one (107) is key-connected to the outer end of the drive shaft (105). A pair of support shafts (108) are symmetrically connected to the left and right sides of the sand discharging bucket (101), and this pair of support shafts (108) are rotatably connected to the two ends of the support frame (102). A pulley two (109) is key-connected to the outer end of the support shaft (108), and a belt one (110) is connected between the pulley one (107) and the pulley two (109) on the same side.

3. The automatic sand preparation device for casting according to claim 1, characterized in that: The interior of the sand placing bucket (101) is coaxially connected to an X-shaped mounting frame (201), the center of the mounting frame (201) is rotatably connected to a spline tube (202), and a hollow spline shaft (203) is slidably connected to the inner side of the spline tube (202), the lower end of the spline shaft (203) is coaxially connected to a mounting sleeve (204), and a plurality of Y-shaped hinged frames (205) are evenly hinged around the mounting sleeve (204), and the sand shoveling plate (206) is provided with a plurality of Y-shaped hinged frames (205) correspondingly connected to the mounting sleeve (204). At the outer end of each hinged frame (205), the sand scraping plate (206) is evenly distributed with a plurality of dispersed holes (206a), the spline shaft (203) is rotatably connected to an X-shaped movable frame (209) above the mounting sleeve (204), each end of the movable frame (209) is vertically connected to a mounting shaft (210), each end of the mounting frame (201) is rotatably connected to a movable sleeve (211), and is located between the mounting shaft (210) and the movable sleeve (211) on the same side. The mounting shaft (210) is provided with a compression spring (213) between the mounting frame (201) and the movable frame (209), a connecting plate (218) is provided in parallel directly above the mounting frame (201), and a plurality of connecting columns (219) are evenly connected between the connecting plate (218) and the mounting frame (201), the hydraulic cylinder (220) is vertically installed downward at the center of the connecting plate (218), and a connecting block (229) is connected at the end of the piston rod of the hydraulic cylinder (220). 1), a plurality of steel wire ropes (222) are connected to the connecting block (221), a connecting strip (223) is vertically connected to the middle of each articulated frame (205), the lower end of each steel wire rope (222) is correspondingly connected to the lower end of each connecting strip (223), and the steel wire rope (222) is sleeved with a second compression spring (224) between the connecting strip (223) and the mounting sleeve (204), and the elastic coefficient of the second compression spring (224) is less than the elastic coefficient of the first compression spring (213).

4. The automatic sand preparation device for casting according to claim 2, characterized in that: An inclined material guide plate (111) is provided below the sand placing bucket (101), and the material guide plate (111) is mounted on the support frame (102) via a pair of support frames (112).

5. The automatic sand preparation device for casting according to claim 3 is characterized in that: A spiral installation groove (210a) is centrally symmetrically provided on the side wall of the installation shaft (210); a pair of movable blocks (212) are centrally symmetrically connected to the inner wall of the movable sleeve (211); the upper end key of the spline tube (202) is connected to the pulley three (214); the upper end key of the movable sleeve (211) is connected to the pulley four (215); all the pulleys three (214) and the pulley four (215) are commonly connected to the upper belt two (216); and the installation frame (201) is evenly distributed with a plurality of pairs of limit posts (217) around the pulley three (214).

6. The automatic sand preparation device for casting according to claim 3, characterized in that: A fixing plate (207) is horizontally welded to the top of the sand scraping plate (206), and a vibration motor (208) is installed on the upper side of the fixing plate (207).

7. The automatic sand preparation device for casting according to claim 3 is characterized in that: Atomizing nozzles (225) are evenly distributed around the mounting frame (201). The atomizing nozzles (225) are vertically downwardly mounted on the mounting frame (201) via mounting strips (226), and the upper ends of the atomizing nozzles (225) are connected to a water inlet pipe (227).

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