阅读说明：本技术 一种降低落砂缺陷的精密铸造设备以及降低缺陷的工艺 (Precision casting equipment capable of reducing shakeout defects and defect reducing process ) 是由 江伟东 于 2021-06-23 设计创作，主要内容包括：本发明提供一种降低落砂缺陷的精密铸造设备以及降低缺陷的工艺,包括铸造台；所述驱动链活动连接在所述铸造台内壁前表面上；所述活动放砂框滑动连接在铸造台内部,且活动放砂框的两侧固定连接驱动链的链条；所述固定螺旋台的底端通过焊接固定连接在活动放砂框底板上表面中间位置；所述砂筒的上端固定连接移动驱动件,且砂筒套在固定螺旋台的外侧；所述分砂盘中间固定连接在砂筒的底部,且分砂盘位于活动放砂框的底板上表面；所述移动驱动件固定连接在活动放砂框上方的往复定位台前侧,提高了对铸砂洒落的均匀性,有利于提高铸砂与模具之间的接触稳定性,减小由于铸砂与工件表面接触面之间密度不一而造成金属液渗透粘砂而对工艺产生影响的几率。(The invention provides a precision casting device for reducing shakeout defects and a process for reducing the defects, comprising a casting table; the driving chain is movably connected to the front surface of the inner wall of the casting table; the movable sand discharging frame is connected inside the casting table in a sliding mode, and chains of the driving chain are fixedly connected to the two sides of the movable sand discharging frame; the bottom end of the fixed spiral table is fixedly connected to the middle position of the upper surface of the movable sand discharging frame bottom plate through welding; the upper end of the sand cylinder is fixedly connected with the movable driving piece, and the sand cylinder is sleeved outside the fixed spiral table; the middle of the sand separating disc is fixedly connected to the bottom of the sand cylinder, and the sand separating disc is positioned on the upper surface of the bottom plate of the movable sand placing frame; the movable driving piece is fixedly connected to the front side of the reciprocating positioning table above the movable sand placing frame, the sprinkling uniformity of the casting sand is improved, the contact stability between the casting sand and a mold is favorably improved, and the probability that the process is influenced due to the fact that molten metal permeates and is bonded due to the fact that the density of the contact surface between the casting sand and the surface of a workpiece is different is reduced.)

1. The utility model provides a precision casting equipment and reduce technology of defect of falling sand defect which characterized in that: the casting apparatus includes: a casting table (1);

the driving chain (2) is movably connected to the front surface of the inner wall of the casting table (1);

the movable sand discharging frame (3) is connected inside the casting table (1) in a sliding mode, and chains of the driving chains (2) are fixedly connected to the two sides of the movable sand discharging frame (3);

the bottom end of the fixed spiral table (4) is fixedly connected to the middle position of the upper surface of the bottom plate of the movable sand discharging frame (3) through welding;

the upper end of the sand cylinder (5) is fixedly connected with a movable driving piece (7), and the sand cylinder (5) is sleeved on the outer side of the fixed spiral table (4);

the middle of the sand separating disc (6) is fixedly connected to the bottom of the sand cylinder (5), and the sand separating disc (6) is positioned on the upper surface of the bottom plate of the movable sand placing frame (3);

the movable driving piece (7), the movable driving piece (7) is fixedly connected to the front side of the reciprocating positioning table (304) above the movable sand discharging frame (3), and the movable driving piece (7) is connected with and drives a middle fulcrum shaft of the fixed spiral table (4);

chain drive spare (8), chain drive spare (8) fixed connection is at casting platform (1) framework internal surface, and chain drive spare (8) output passes through gear engagement and connects and drive driven pulley (2011).

2. The precision casting apparatus for reducing shakeout defects as set forth in claim 1, wherein: the casting table (1) comprises:

the main casting platform (101), the main casting platform (101) is arranged in the right area of the middle of the casting platform (1), and the right side of the main casting platform (101) is provided with a longitudinal supporting beam;

the auxiliary casting platform (102) is arranged on the left side of the interior of the casting platform (1), a longitudinal supporting beam is arranged on the left side of the auxiliary casting platform (102), and a part of separation beam is arranged between the auxiliary casting platform (102) and the main casting platform (101).

3. The precision casting apparatus for reducing shakeout defects as set forth in claim 2, wherein: the casting table (1) further comprises:

an inner support frame (103), the rear surface of the inner support frame (103) is fixedly connected to the inner front surface of the casting table (1) by welding, and the inner support frame (103) is arranged parallel to the horizontal plane;

the bottom of the outer supporting frame (104) is fixedly connected to the front side of the interior of the casting table (1) through a welding bracket, and the outer supporting frame (104) is parallel to the inner supporting frame (103).

4. The precision casting apparatus for reducing shakeout defects as set forth in claim 1, wherein: the drive chain (2) comprises:

the rear end of the shaft of the driving chain wheel (201) is rotatably connected to the right side in front of the rear wall of the casting table (1) through a bearing, and the front end of the shaft of the driving chain wheel (201) is fixedly connected with a driven belt wheel (2011);

the rear end of the shaft of the auxiliary chain wheel (202) is rotatably connected to the front left side of the rear wall of the casting table (1) through a bearing.

5. The precision casting apparatus for reducing shakeout defects as set forth in claim 1, wherein: the movable sand discharging frame (3) comprises:

the sand shakeout holes (301), the sand shakeout holes (301) are distributed and arranged in the middle of the bottom plate of the movable sand discharge frame (3);

the fixed clamping blocks (302) are movably connected below the frames on the two sides of the movable sand discharge frame (3) through bolts;

the reciprocating support (303), the reciprocating support (303) has two positions altogether, and the two reciprocating supports (303) are fixedly connected to the front surface and the rear surface of the movable sand discharge frame (3) respectively;

the reciprocating positioning table (304), the reciprocating positioning table (304) is fixedly connected with the upper part of the frame body of the movable sand discharging frame (3).

6. The precision casting apparatus for reducing shakeout defects as set forth in claim 5, wherein: a row of reciprocating rollers (3031) with a cylindrical structure are transversely arranged on the lower surface of the reciprocating support (303), and the reciprocating support (303) is rotatably connected to the reciprocating support (303).

7. The precision casting apparatus for reducing shakeout defects as set forth in claim 1, wherein: the middle stage body of fixed screw platform (4) is the toper structure, and the cone end fixed connection activity of fixed screw platform (4) puts sand frame (3) bottom plate upper surface intermediate position, and fixed screw platform (4) are including:

the sand grains (401) are stirred in a spiral mode, and the sand grains (401) are stirred in a spiral mode and are fixedly connected to the side face of the table body of the fixed spiral table (4) in a surrounding mode.

8. The precision casting apparatus for reducing shakeout defects as set forth in claim 1, wherein: sand section of thick bamboo (5) are the funnel structure cover body, and the opening of sand section of thick bamboo (5) up, sand section of thick bamboo (5) including:

the lower half part of the upper connecting frame (501) is connected with three supports in a surrounding way, and the tail ends of the three supports are fixedly connected with the inner wall of an upper opening of a sand cylinder (5) body;

the sand outlet hole (502), the sand outlet hole (502) is arranged on the inner wall of the sand cylinder (5).

9. The precision casting apparatus for reducing shakeout defects as set forth in claim 1, wherein: divide sand dish (6) to be helical structure and encircle the setting, and divide the bottom of sand dish (6) to set up rectangular sand filtering groove (601), divide the lower surface of sand dish (6) and the bottom plate upper surface of activity sand discharge frame (3) to have a space of one millimeter.

10. The process for manufacturing a precision casting apparatus with reduced shakeout defects according to claim 1, wherein: the method comprises the following steps:

01. firstly, respectively placing an upper die and a lower die of a sand box in areas on two sides of a casting table (1), and simultaneously placing sand on two sides;

02. placing the casting sand in a sand cylinder (5), wherein the sand cylinder (5) and an upper connecting frame (501) are driven by a movable driving piece (7) to rotate, and the casting sand is adjusted in the sand cylinder (5);

03. when the sand cylinder (5) rotates, the fixed spiral table (4) and the movable sand discharge frame (3) are fixed, so that the cast sand in the sand cylinder is automatically and uniformly stirred, flows out from the position of the sand outlet hole (502), and is uniformly scattered in the movable sand discharge frame (3);

04. the middle of the sand separating plate (6) is fixedly connected with the tail end of the sand cylinder (5), and is driven by the sand cylinder (5) to rotate, so that the casting sand on the movable sand discharging frame (3) is uniformly stirred and uniformly sprinkled on a sand box below through the sand discharging holes (301), and the uniformity of sand discharging is improved;

05. the bottom of the fixed spiral table (4) is fixedly connected to the middle of the upper surface of the movable sand discharging frame (3), when the sand cylinder (5) and the sand separating disc (6) rotate, the fixed spiral table (4) is fixed, casting sand in the sand cylinder (5) is stirred, and the casting sand is uniformly driven to the inside of the sand cylinder (5), so that the casting sand can fall through the sand outlet hole (502);

06. the chain driving part (8) acts to enable the driving chain (2) to move under the control of driving, the movable sand discharging frame (3) can be pulled, the position of the movable sand discharging frame (3) in the casting table (1) is adjusted, the reciprocating roller (3031) is in contact with the outer supporting frame (104) and the inner supporting frame (103) to form rolling connection, friction force can be reduced, noise generated in the using process is reduced, and the using process of the device is completed.

Technical Field

The invention belongs to the technical field of machining, and particularly relates to precision casting equipment for reducing shakeout defects and a defect reducing process.

Background

The mechanical sand sticking is also called metal liquid infiltration sand sticking, which is a metal and sand sticking layer formed by mechanically mixing metal and sand on the surface of a casting by drilling liquid metal or metal oxide into sand gaps on the surface of a cavity in a capillary infiltration or gas phase infiltration mode, and the metal luster can be seen when the sand sticking layer is removed. The mechanical sand adhesion surface is in a sponge shape and firmly adhered to the surface of a casting, and is mostly generated at the parts with strong heating action on the surfaces of a sand mold and a sand core and low compactness of the sand mold, such as the positions near a casting head, a thick and large section of the casting, an inner angle and a groove, the mechanical sand adhesion not only influences the appearance quality of the cast casting, but even causes scrapping, so that enough attention must be paid to the mechanical sand adhesion of the casting to improve the yield of products.

For example, application No.: CN202010897146.6 the invention discloses a precoated sand casting method for a large casting, which comprises the steps of hoisting and desanding the large casting through the combined work of a hoisting plate, a hoisting ring, a digging device, a clamping device, a driving device and a knocking device.

Based on the search of the above patent and the discovery of the structure in the prior art, when the sand casting similar to that in the above patent is used, the compactness of the sand mold is low due to the uneven particle size distribution of the raw sand, and the particle size distribution of the raw sand has a direct influence on the maximum compactness of the sand mold, so that the casting is easy to be subjected to mechanical sand sticking.

Disclosure of Invention

In order to solve the technical problems, the invention provides precision casting equipment for reducing the shakeout defect and a defect reducing process, so as to solve the problem that when the precision casting equipment is used for sand casting like the sand casting in the patent, the sand mold compactness is low due to uneven particle size distribution of raw sand, and the particle size distribution of the raw sand directly influences the maximum compactness of the sand mold, so that mechanical sand sticking is easily caused to castings.

The invention relates to a precision casting device for reducing shakeout defects and a purpose and an effect of a defect reducing process, which are achieved by the following specific technical means:

a precision casting equipment for reducing shakeout defects and a process for reducing the defects comprise a casting table; the driving chain is movably connected to the front surface of the inner wall of the casting table; the movable sand discharging frame is connected inside the casting table in a sliding mode, and chains of the driving chain are fixedly connected to the two sides of the movable sand discharging frame; the bottom end of the fixed spiral table is fixedly connected to the middle position of the upper surface of the bottom plate of the movable sand discharging frame through welding; the upper end of the sand cylinder is fixedly connected with the movable driving piece, and the sand cylinder is sleeved outside the fixed spiral table; the middle of the sand separating disc is fixedly connected to the bottom of the sand cylinder, and the sand separating disc is positioned on the upper surface of the bottom plate of the movable sand placing frame; the movable driving piece is fixedly connected to the front side of the reciprocating positioning table above the movable sand discharging frame, and the movable driving piece is connected with and drives a middle fulcrum shaft of the fixed spiral table; the chain driving piece is fixedly connected to the inner surface of the casting table frame, and the output end of the chain driving piece is connected with and drives the driven belt wheel through gear meshing.

Furthermore, the casting table comprises a main casting table, the main casting table is arranged in the right area in the middle of the casting table, and a longitudinal support beam is arranged on the right side of the main casting table; the auxiliary casting table is arranged on the left side of the interior of the casting table, a longitudinal supporting beam is arranged on the left side of the auxiliary casting table, and a separation beam is arranged between the auxiliary casting table and the main casting table.

Furthermore, the casting table also comprises an inner supporting frame, the rear surface of the inner supporting frame is fixedly connected to the inner front surface of the casting table through welding, and the inner supporting frame is arranged in parallel to the horizontal plane; the bottom of the outer support frame is fixedly connected to the front side of the interior of the casting table through a welding support, and the outer support frame is parallel to the inner support frame.

Furthermore, the driving chain comprises a driving chain wheel, the rear end of the shaft of the driving chain wheel is rotatably connected to the right side in front of the rear wall of the casting table through a bearing, and the front end of the shaft of the driving chain wheel is fixedly connected with a driven belt wheel; the rear end of the shaft of the auxiliary chain wheel is rotatably connected to the front left side of the rear wall of the casting table through a bearing.

Furthermore, the movable sand discharging frame comprises sand shakeout holes which are distributed and arranged in the middle of the bottom plate of the movable sand discharging frame; the fixed clamping blocks are movably connected below the frames on the two sides of the movable sand discharging frame through bolts; the reciprocating support is provided with two positions which are respectively and fixedly connected to the front surface and the rear surface of the movable sand discharging frame; the reciprocating positioning table is fixedly connected with the upper part of the frame body of the movable sand discharging frame.

Furthermore, a row of reciprocating rollers with a cylinder structure are transversely arranged on the lower surface of the reciprocating support, and the reciprocating support is rotatably connected to the reciprocating support.

Furthermore, the middle stage body of fixed spiral platform is the toper structure, and the cone end fixed connection activity of fixed spiral platform puts sand frame bottom plate upper surface intermediate position, and fixed spiral platform stirs the sand line including the spiral, and the sand line is stirred to the spiral and is fixed the stage body side of encircleing the connection at fixed spiral platform that encircles of helical structure.

Furthermore, the sand cylinder is a funnel-structure cover body, the opening of the sand cylinder faces upwards, the sand cylinder comprises an upper connecting frame, the lower half part of the upper connecting frame is connected with three supports in a surrounding manner, and the tail ends of the three supports are fixedly connected with the inner wall of the upper opening of the sand cylinder body; the sand outlet is arranged on the inner wall of the sand cylinder.

Furthermore, divide the sand dish to be the helical structure and encircle the setting, and divide the bottom of sand dish to set up the sand filtering groove of rectangle, divide the lower surface of sand dish and the bottom plate upper surface of activity sand discharge frame to have a space of one millimeter.

Compared with the prior art, the invention has the following beneficial effects:

through the matching of the casting table and the driving chain, the casting table is divided into two areas which can be respectively used for placing an upper mold and a lower mold of a sand box, sand discharging can be carried out on two sides, the outer supporting frame and the inner supporting frame can be used for supporting the movable sand discharging frame, the movable sand discharging frame can reciprocate on the outer supporting frame and the inner supporting frame, the position of the sand discharging is adjusted, the action of reciprocating movement of the sand discharging frame in the sand discharging process is avoided, and the driving chain is positioned in front of the rear wall of the casting table and is connected with an output shaft of the chain driving piece in a meshed mode to drive the driving chain.

Through the cooperation of the movable sand discharging frame and the casting platform of the structure, two fixed clamping blocks on two sides of the movable sand discharging frame are respectively and fixedly connected with two ends of a driving chain, the driving chain is driven by a chain driving piece to move, the movable sand discharging frame can be pulled, the position of the movable sand discharging frame in the casting platform is adjusted, in addition, the lower surface transverse arrangement of a reciprocating support is provided with a row of reciprocating rollers of a cylindrical structure, the reciprocating rollers are in contact with an outer support frame and an inner support frame, rolling connection is formed, friction force can be reduced, noise generated in the using process is reduced, the movable sand discharging frame is a rectangular frame body, a sand falling hole is formed in a bottom plate, and sand discharging is facilitated.

Through the matching of the sand cylinder and the fixed spiral table of the structure, the sand cylinder and the upper connecting frame rotate under the driving of the movable driving piece, the casting sand is adjusted in the sand cylinder, when the sand cylinder rotates, the fixed spiral table and the movable sand discharging frame are fixed and fixed, so that the internal casting sand is automatically stirred uniformly and flows out from the position of the sand outlet hole and uniformly sprinkles into the movable sand discharging frame, the middle of the sand separating disc is fixedly connected with the tail end of the sand cylinder, the rotation is realized under the driving of the sand cylinder, the casting sand on the movable sand discharging frame is stirred uniformly, the casting sand uniformly sprinkles on a sand box below through the sand outlet hole, the uniformity of the casting sand is improved, the bottom of the fixed spiral table is fixedly connected in the middle of the upper surface of the movable sand discharging frame, when the sand cylinder and the sand separating disc rotate, the fixed spiral table is fixed and does not move, the casting sand in the sand cylinder is stirred, the casting sand is uniformly driven into the sand cylinder, the casting sand can favorably fall through the sand outlet hole, and the uniformity of the casting sand sprinkling is improved, the method is favorable for improving the contact stability between the casting sand and the die and reducing the probability of influence on the process caused by the infiltration and sand bonding of molten metal due to the inconsistent density between the casting sand and the contact surface of the workpiece surface.

Drawings

Fig. 1 is a schematic structural view of the present invention.

FIG. 2 is a schematic view of the construction of the casting table of the present invention.

Fig. 3 is a structural schematic diagram of the sand separating disc of the invention.

FIG. 4 is a schematic structural diagram of the movable sand discharge frame of the present invention.

Fig. 5 is a schematic structural view of the sand cylinder of the present invention.

FIG. 6 is a schematic view of the structure of the reciprocating carriage of the present invention.

Fig. 7 is a partially enlarged view of a portion a of fig. 3 according to the present invention.

Fig. 8 is a partial enlarged structural view of the invention at B of fig. 6.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a casting table; 101. a main casting table; 102. an auxiliary casting table; 103. an inner support frame; 104. an outer support frame; 2. a drive chain; 201. a drive sprocket; 2011. a driven pulley; 202. an auxiliary sprocket; 3. a movable sand discharging frame; 301. a shakeout hole; 302. fixing the clamping block; 303. a reciprocating support; 3031. a reciprocating drum; 304. a reciprocating positioning table; 4. fixing the spiral table; 401. spirally stirring the sand grains; 5. a sand cylinder; 501. an upper connecting frame; 502. a sand outlet; 6. a sand separating disc; 601. a sand filtering tank; 7. moving the driving member; 8. a chain drive.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figures 1 to 8:

the invention provides a precision casting device for reducing shakeout defects and a process for reducing the defects, comprising a casting table 1; the driving chain 2 is movably connected on the front surface of the inner wall of the casting table 1; the movable sand discharging frame 3 is connected inside the casting table 1 in a sliding manner, and two sides of the movable sand discharging frame 3 are fixedly connected with chains of the driving chain 2; the bottom end of the fixed spiral table 4 is fixedly connected to the middle position of the upper surface of the bottom plate of the movable sand discharge frame 3 through welding; the upper end of the sand cylinder 5 is fixedly connected with a movable driving piece 7, and the sand cylinder 5 is sleeved outside the fixed spiral table 4; the middle of the sand separating disc 6 is fixedly connected to the bottom of the sand cylinder 5, and the sand separating disc 6 is positioned on the upper surface of the bottom plate of the movable sand placing frame 3; the movable driving part 7 is fixedly connected to the front side of the reciprocating positioning table 304 above the movable sand discharging frame 3, and the movable driving part 7 is connected with and drives a middle fulcrum shaft of the fixed spiral table 4; the chain drive 8 is fixedly connected to the inner surface of the frame of the casting table 1, and the output end of the chain drive 8 is connected to and drives the driven pulley 2011 through gear engagement.

The casting platform 1 comprises a main casting platform 101, the main casting platform 101 is arranged in the right area of the middle of the casting platform 1, and a longitudinal supporting beam is arranged on the right side of the main casting platform 101; the auxiliary casting table 102 is arranged on the left side of the interior of the casting table 1, a longitudinal supporting beam is arranged on the left side of the auxiliary casting table 102, a plurality of partition beams are arranged between the auxiliary casting table 102 and the main casting table 101, the rear surface of the inner supporting frame 103 is fixedly connected to the front surface of the interior of the casting table 1 through welding, and the inner supporting frame 103 is arranged in parallel to the horizontal plane; the bottom of the outer support frame 104 is fixedly connected to the front side of the interior of the casting table 1 through a welding bracket, and the outer support frame 104 is parallel to the inner support frame 103, the casting table 1 of the structure is divided into two areas as shown in fig. 2, the casting table 1 can be used for placing an upper mold and a lower mold of a sand box respectively, sand discharging can be carried out on two sides, and the outer support frame 104 and the inner support frame 103 can be used for supporting the movable sand discharging frame 3, so that the movable sand discharging frame 3 can move on the outer support frame 104 and the inner support frame 103 in a reciprocating manner, the position of sand discharging is adjusted, and the action of moving the sand discharging frame in a reciprocating manner in the sand discharging process is avoided.

The driving chain 2 comprises a driving chain wheel 201, the rear end of the shaft of the driving chain wheel 201 is rotatably connected to the right side in front of the rear wall of the casting table 1 through a bearing, and the front end of the shaft of the driving chain wheel 201 is fixedly connected with a driven belt wheel 2011; the rear end of the shaft of the auxiliary sprocket 202 is rotatably connected to the front left side of the rear wall of the casting table 1 through a bearing, and the drive chain 2 of this structure is positioned in front of the rear wall of the casting table 1 as shown in fig. 1, and is driven by meshing engagement with the output shaft of the chain drive 8.

The movable sand release frame 3 comprises sand shakeout holes 301, and the sand shakeout holes 301 are distributed in the middle of a bottom plate of the movable sand release frame 3; the fixed clamping blocks 302 are movably connected below the two side frames of the movable sand discharge frame 3 through bolts; the reciprocating support 303 is provided with two positions, and the two reciprocating supports 303 are respectively and fixedly connected to the front surface and the rear surface of the movable sand discharging frame 3; the reciprocating positioning table 304 is fixedly connected above the frame body of the movable sand discharging frame 3, a row of reciprocating rollers 3031 with a cylindrical structure is transversely arranged on the lower surface of the reciprocating support 303, the reciprocating support 303 is rotatably connected on the reciprocating support 303, the movable sand discharging frame 3 with the structure is shown in fig. 6, two fixed clamping blocks 302 at two sides of the movable sand discharging frame 3 are respectively and fixedly connected with two tail ends of a driving chain 2, the driving chain 2 is driven by a chain driving part 8 to move, the movable sand discharging frame 3 can be pulled, the position of the movable sand discharging frame 3 in the casting table 1 is adjusted, in addition, a row of reciprocating rollers 3031 with a cylindrical structure is transversely arranged on the lower surface of the reciprocating support 303, the reciprocating rollers 3031 are in contact with the outer support frame 104 and the inner support frame 103 to form rolling connection, the rolling connection can be used for reducing friction force and reducing noise generated in the using process, the movable sand discharging frame 3 is a rectangular frame body, the bottom plate is provided with a sand falling hole 301 for facilitating sand discharging.

Wherein, the middle stage body of fixed screw platform 4 is the toper structure, and the awl end fixed connection activity of fixed screw platform 4 puts 3 bottom plate upper surface intermediate positions of sand frame, fixed screw platform 4 stirs sand line 401 including the spiral, the spiral stirs sand line 401 and is the fixed stage body side of surrounding connection at fixed screw platform 4 of helical structure, the fixed screw platform 4 of this structure is as shown in figure 4, fixed screw platform 4 bottom fixed connection is in the middle of the upper surface of activity sand frame 3 of putting, when sand section of thick bamboo 5 rotates with dividing sand dish 6, fixed screw platform 4 is fixed motionless, mix the inside casting sand of sand section of thick bamboo 5, and evenly drive sand section of thick bamboo 5 inside with the casting sand, be favorable to the casting sand to drop through sand outlet 502.

The sand cylinder 5 is a funnel-structured cover body, the opening of the sand cylinder 5 faces upwards, the sand cylinder 5 comprises an upper connecting frame 501, the lower half part of the upper connecting frame 501 is connected with three supports in a surrounding manner, and the tail ends of the three supports are fixedly connected with the inner wall of the upper opening of the cylinder body of the sand cylinder 5; the sand outlet 502 is arranged on the inner wall of the sand cylinder 5, the sand cylinder 5 with the structure is shown in fig. 5, the sand cylinder 5 and the upper connecting frame 501 are driven by the movable driving part 7 to rotate, the sand casting is adjusted in the sand cylinder 5, when the sand cylinder 5 rotates, the fixed spiral table 4 is fixed with the movable sand discharging frame 3, the internal cast sand is automatically stirred uniformly, flows out from the position of the sand outlet 502, and is uniformly sprayed in the movable sand discharging frame 3.

Wherein, divide sand dish 6 to be helical structure and encircle the setting, and divide the bottom of sand dish 6 to set up the filter sand groove 601 of rectangle, divide the lower surface of sand dish 6 and the bottom plate upper surface that the sand frame 3 was put in the activity to have a space of a millimeter, the branch sand dish 6 of this structure is as shown in figure 5, divide the end of the middle fixed connection sand section of thick bamboo 5 of sand dish 6, it is rotatory to realize under the drive of sand section of thick bamboo 5, the foundry sand that will move about on putting the sand frame 3 homogenizes, evenly spill on the sand box of below through knockout hole 301, the homogeneity of putting the sand has been improved.

When in use: firstly, an upper die and a lower die of a sand box are respectively placed in two areas of a casting table 1, sand discharging can be carried out on two sides, casting sand is placed in a sand cylinder 5, the sand cylinder 5 and an upper connecting frame 501 are driven by a movable driving piece 7 to rotate, casting sand is adjusted in the sand cylinder 5, when the sand cylinder 5 rotates, a fixed spiral table 4 and a movable sand discharging frame 3 are fixed and do not move, internal casting sand is automatically stirred uniformly, the casting sand flows out from a sand outlet 502 position and uniformly sprinkles in the movable sand discharging frame 3, the middle of a sand distributing disc 6 is fixedly connected with the tail end of the sand cylinder 5, rotation is realized under the drive of the sand cylinder 5, the casting sand on the movable sand discharging frame 3 is stirred uniformly and evenly sprinkles on a sand box below through a sand dropping hole 301, the uniformity of the casting sand discharging is improved, the bottom of the fixed spiral table 4 is fixedly connected to the middle of the upper surface of the movable sand discharging frame 3, when the sand cylinder 5 and the sand distributing disc 6 rotate, the fixed spiral table 4 is fixed and does not move, stirring the casting sand in the sand cylinder 5, uniformly driving the casting sand into the sand cylinder 5, facilitating the casting sand to fall through the sand outlet 502, enabling the driving chain 2 to move under the control of the action of the chain driving piece 8, pulling the movable sand discharging frame 3, adjusting the position of the movable sand discharging frame 3 in the casting table 1, enabling the reciprocating roller 3031 to be in contact with the outer support frame 104 and the inner support frame 103 to form rolling connection, and being capable of reducing friction and reducing noise generated in the use process.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.