Foundry sand unloading auxiliary device

Abstract

The invention discloses a foundry sand unloading auxiliary device, and relates to the technical field of foundry sand unloading. Comprising a mold feeding section, a turnover sand discharging section and a mold discharging section, a sand discharging assembly is arranged below the turnover sand discharging section, the mold feeding section and the mold discharging section are used for conveying a casting mold, and the turnover sand discharging section and the sand discharging assembly are used for conducting turnover discharging and casting sand separation on the casting mold correspondingly; the casting mold is positioned, so that the casting mold is separated from the conveying wheel, the casting mold is overturned through the overturning roller, complete blanking of casting sand and castings is realized under the action of gravity and vibration, the labor intensity of personnel is greatly reduced in the whole process, and the sand unloading efficiency is improved; according to the casting sand separation device, the separation mechanism is arranged over the overturning roller, a casting and casting sand are separated, floating sand on the surface of the casting is cleaned through the blowing head and the cleaning brush, caked casting sand is pulverized through the combined action of the discharging roller set and the crushing filter screen at the bottom, and separation of the casting sand is better completed.

Description

Technical Field

[0001] The invention relates to the technical field of foundry sand unloading, in particular to a foundry sand unloading auxiliary device. Background Art

[0002] In the casting process, the use of foundry sand is essential. After casting, the sand box needs to be opened to separate the foundry sand from the casting. The manual unloading method is time-consuming and inefficient, with high labor intensity and no guarantee of safety.

[0003] However, the sand unloading devices in the prior art often cannot completely unload the sand, and the separation of the castings after unloading still needs to be done manually, which cannot form a complete sand unloading flow operation, and has little effect on improving efficiency and relieving personnel from high-intensity labor. To this end, we propose a foundry sand unloading auxiliary device. Summary of the invention

[0004] The object of the present invention is to provide a foundry sand unloading auxiliary device.

[0005] The technical problems solved by the present invention are:

[0006] (1) Solve the problem that it is difficult to flip the casting mold during the existing sand unloading process and the casting sand and the mold are adhered to each other, resulting in incomplete sand unloading;

[0007] (2) The problem that the casting and the foundry sand cannot be automatically separated after the sand is unloaded and the agglomeration of the foundry sand cannot be processed synchronously in the prior art is solved.

[0008] The present invention can be implemented by the following technical scheme: a casting sand unloading auxiliary device comprises a die-feeding section, a flipping lower sand section and a die-out section, a sand-out assembly is arranged below the flipping lower sand section, the die-feeding section and the die-out section are used to transport the casting mold, and the flipping lower sand section and the sand-out assembly are used to flip and unload the casting mold and separate the casting sand respectively;

[0009] The sand unloading section includes a turning drum which is arranged on the top of the sand discharging assembly in a rolling manner. A linkage positioning mechanism for supporting and positioning the casting mold is arranged in the turning drum. After the linkage positioning mechanism completes the positioning, the sand is unloaded by turning and vibrating.

[0010] The sand discharge component mainly includes a separation mechanism and a sand conveyor belt. The separation mechanism separates the casting and the casting sand. The casting sand is separated and enters the sand conveyor belt to be sent out.

[0011] A further technical improvement of the present invention is that an adjustment plate is slidably installed at a symmetrical position on the inner wall of the flip drum, and two rows of evenly arranged conveying wheels are arranged on the opposite side walls of the adjustment plate. The rotation directions of a pair of conveying wheels located at the upper and lower positions are opposite, and the mold entry section and the mold exit section are also installed with conveying wheels for transporting the casting mold.

[0012] A further technical improvement of the present invention is that the two adjustment plates are driven to move closer to and farther from each other by an eccentric structure, the eccentric structure includes an eccentric wheel rotatably connected to the flip drum, the eccentric wheel and the adjustment plate are connected by an eccentric rod, one end of the eccentric rod is fixed to the adjustment plate, and the other end is slidably connected to the eccentric wheel.

[0013] A further technical improvement of the present invention is that the linkage positioning mechanism includes a positioning plate fixed at positions near the two ends of the flip drum, two sliding blocks are symmetrically slidably arranged in the positioning plate, a sliding rod that slides through the positioning plate is fixed on the opposite side of the sliding block, a connecting rod is rotatably arranged at the end of the sliding rod, and the end of the connecting rod away from the sliding rod is hinged to the adjustment plate;

[0014] Two positioning pins are symmetrically telescopically arranged at the bottom of the positioning plate, a positioning track is arranged on the side of the slider, and a lifting rod fixed at the bottom of the positioning pin cooperates with the positioning track to drive the positioning pin to move up and down.

[0015] A further technical improvement of the present invention is that a floating block is sleeved on the outer periphery of the positioning pin, and the floating block is installed on the positioning pin in a floating manner through a spring.

[0016] A further technical improvement of the present invention is that an opening with an adjustable opening is provided on the top of the flipping drum, a hydraulic cylinder is fixedly installed on the inner wall opposite to the opening on the flipping drum, a vibration plate driven by a vibration motor is fixed on the output end of the hydraulic cylinder, and the vibration plate and the linkage positioning mechanism jointly position and flip the casting mold.

[0017] A further technical improvement of the present invention is that the separation mechanism is mounted and fixed on the top of the sand conveyor belt, the separation mechanism includes a sand separation box, a discharge roller group is horizontally arranged in the sand separation box, a crushing filter is installed below the discharge roller group, a separation outlet is opened at the side wall of the sand separation box at a height corresponding to the discharge roller group, and a cleaning brush is installed at the separation outlet.

[0018] A further technical improvement of the present invention is that the crushing filter screen is wavy in shape and matches the bottom arc of a single discharge roller of the discharge roller group at a corresponding position.

[0019] A further technical improvement of the present invention is that an arc groove matching the curvature of the flip roller is arranged on the top of the dividing sand box, and a transmission roller for supporting and transmitting the arc groove is rotatably installed near the two ends of the arc groove; a transmission gear ring is arranged on the outer peripheral fixed sleeve near the two ends of the flip roller, and a driving gear driven by a motor is arranged at the corresponding position of the dividing sand box, and the driving gear is meshed with the transmission gear ring for transmission.

[0020] A further technical improvement of the present invention is that a plurality of blowing heads are installed on the outer wall of the side of the turning drum away from the opening to blow air into the sand box.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention uses a vibration plate and a linkage positioning mechanism to position the casting mold, so that the casting mold is out of contact with the conveying wheel, and quickly flips the casting mold by setting a flip roller, so that the casting sand and castings can be completely unloaded under the action of gravity and vibration. The whole process does not require manual participation, which greatly reduces the labor intensity of personnel, and the casting mold does not need to be cleaned twice, which improves the efficiency of sand unloading;

[0023] 2. The present invention utilizes a linkage positioning mechanism to disengage the casting mold from the conveying wheel during the sand unloading process, releases the positioning of the casting mold after the sand unloading is completed, and reuses the conveying wheel to support and transport the casting mold, thereby realizing a fully automated casting mold transportation and positioning sand unloading process;

[0024] 3. The present invention sets a separation mechanism just above the turning drum to separate the casting from the casting sand, uses an air blowing head and a cleaning brush to clean the floating sand on the surface of the casting, and the combined action of the discharge roller group and the crushing filter at the bottom crushes the agglomerated casting sand, which is more conducive to the separation of the casting sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0026] Figure 1 It is a schematic diagram of the overall external structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the transmission structure connection of the conveying wheel of the present invention;

[0028] Figure 3 It is a schematic diagram of the side structure of the present invention;

[0029] Figure 4 For the present invention Figure 1 A partial enlarged view of the middle A;

[0030] Figure 5 For the present invention Figure 3 A partial enlarged view of point B in the middle;

[0031] Figure 6 It is a schematic diagram of the internal structure connection of the positioning plate of the present invention;

[0032] Figure 7 It is a schematic diagram of the internal structure of the sand box of the present invention.

[0033] In the figure: 1, die entry section; 2, flip sand lower section; 3, die exit section; 4, sand exit assembly; 5, casting mold; 101, conveying frame; 102, conveying wheel; 103, conveying worm; 104, conveying worm wheel; 105, transition gear; 106, transmission gear; 201, flip roller; 202, closed chute; 203, closed slide plate; 204, transmission gear ring; 205, driving gear; 206, adjustment plate; 207, eccentric wheel; 208, eccentric rod; 209, fixed plate ; 210, positioning plate; 211, slider; 212, positioning track; 213, slide bar; 214, lifting rod; 215, positioning pin; 216, positioning spring; 217, floating block; 218, connecting rod; 219, blowing head; 220, hydraulic cylinder; 221, vibration plate; 41, separation mechanism; 42, sand conveyor belt; 411, sand box; 412, separation outlet; 413, cleaning brush; 414, discharge roller group; 415, crushing filter; 501, positioning sleeve. DETAILED DESCRIPTION

[0034] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0035] See also Figure 1-2 As shown, the foundry sand unloading auxiliary device comprises a die feed section 1, a flip lower sand section 2 and a die discharge section 3. The casting mold 5 enters the flip lower sand section 2 from the die feed section 1. The flip lower sand section 2 flips and shakes out the sand on the casting mold 5. The casting after the sand shaking is separated from the casting sand by a sand discharge component 4. The casting mold 5 after the sand shaking is flipped again by the flip lower sand section 2 and enters the die discharge section 3 to be sent out. The flip lower sand section 2 is arranged between the die feed section 1 and the die discharge section 3, and the flip lower sand section 2 is rotatably arranged at the top position of the sand discharge component 4.

[0036] Among them, the structures of the die-in section 1 and the die-out section 3 for conveying the casting mold 5 are exactly the same, and the die-in section 1 is taken as an example for explanation: the die-in section 1 includes a conveying frame 101 symmetrically arranged at a certain height, and a conveying worm 103 is installed in the conveying frame 101 on each side through a motor-driven rotation, and a plurality of worm spiral segments are evenly arranged on the conveying worm 103, and a conveying worm wheel 104 meshing with the worm 103 is arranged at a corresponding position, and a transition gear 105 and a conveying wheel 102 are coaxially fixed on one side of the conveying worm wheel 104, and a transmission gear 106 is meshingly connected to the upper side of the transition gear 105, and another conveying wheel 102 is coaxially fixed on one side of the transmission gear 106, and the conveying worm wheel 104, the transition gear 105 and the transmission gear 106 are respectively rotatably connected relative to the conveying frame 101;

[0037] When the motor drives the conveying worm 103 to rotate, the conveying worm 103 rotates to drive the conveying worm wheel 104 to rotate, and the transition gear 105 rotates synchronously therewith, thereby driving the transmission gear 106 to rotate, so that the two conveying wheels 102 rotate, and the two rotation directions are opposite.

[0038] The flip lower sand section 2 includes a horizontally arranged flip drum 201 that can realize 180-degree or 360-degree rotation. The structure in the flip lower sand section 2 is described below in its initial state:

[0039] An opening is provided at the top of the turning drum 201, and closed chutes 202 are provided on both side walls of the opening. A closed slide plate 203 with an adjustable sliding position is slidably installed in the side wall of the turning drum 201. Both ends of the closed slide plate 203 are arranged in the closed chutes 202 and slide along the closed chutes 202 to control the opening of the open closed chutes 202, thereby preventing the casting sand from overflowing from the wrapping range of the turning drum 201 during the turning process.

[0040] like Figure 3-5 As shown, adjustment plates 206 are slidably installed at symmetrical positions on both sides of the horizontal side of the flip drum 201, and two rows of conveying wheels 102 for conveying the casting mold are arranged on the opposite side of the two adjustment plates 206, and the driving mode thereof is exactly the same as that of the mold feeding section 1, and an eccentric wheel 207 controlled by a motor is relatively rotated and installed in the chute on the opposite side of the two adjustment plates 206, and one end of an eccentric rod 208 is slidably arranged in the eccentric wheel 207, and the end of the eccentric rod 208 away from the eccentric wheel 207 is fixedly connected to the adjustment plate 206;

[0041] Two parallel fixing plates 209 are horizontally fixed on one side of the flip drum 201 near the opening. The two fixing plates 209 are respectively located near the two ends of the flip drum 201. A positioning plate 210 is fixedly installed at the bottom of each fixing plate 209. Figure 6 As shown, two sliders 211 are symmetrically slidably arranged inside the positioning plate 210, and a slide bar 213 is fixed on the opposite sides of the two sliders 211, and the end of the slide bar 213 away from the slider 211 passes through the positioning plate 210, and two positioning pins 215 are longitudinally slidably arranged at the bottom of the positioning plate 210, and a lifting rod 214 is fixed to the top of each positioning pin 215, and a roller is rotatably installed on the upper end of the lifting rod 214, and the roller is arranged in the positioning track 212 opened on the corresponding slider 211 and rollingly cooperates with the positioning track 212; a positioning spring 216 is sleeved on the outer periphery of the positioning pin 215, and the upper end of the positioning spring 216 is fixedly connected to the positioning pin 215, and a floating block 217 is fixed to the lower end of the positioning spring 216, so that the floating block 217 is floatingly sleeved on the positioning pin 215;

[0042] A connecting rod 218 is arranged between the slide bar 213 and the adjustment plate 206 on the adjacent side. The two ends of the connecting rod 218 are respectively hinged to the slide bar 213 and the adjustment plate 206. A hydraulic cylinder 220 is fixedly installed at the center position of the side of the flip drum 201 away from the opening. A vibration disk 221 driven by a vibration motor is fixedly installed at the output end of the hydraulic cylinder 220.

[0043] like Figure 1 , 2 As shown in Figure 7, the sand discharge assembly 4 includes a separation mechanism 41 and a sand conveyor belt 42. The separation mechanism 41 is fixed on the top of the sand conveyor belt 42. The flip roller 201 is rotatably arranged on the top of the separation mechanism 41. An arc groove matching the arc of the flip roller 201 is arranged on the top of the separation mechanism 41. Transmission rollers for supporting and transmitting the flip rollers are rotatably installed near the two ends of the arc groove. Transmission gear rings 204 are fixedly sleeved on the outer periphery of the two ends of the flip roller 201. A motor-driven driving gear 205 is arranged in the middle position of the top of the separation mechanism 41. The driving gear 205 is meshed with the transmission gear ring 204 for transmission. A plurality of blowing heads 219 are installed on the outer wall of the flip roller 201 on the side away from the opening to blow air into the sand dividing box 411 of the separation mechanism 41.

[0044] A discharge roller group 414 driven and controlled by a motor is installed horizontally inside the sand box 411, and a crushing filter 415 is installed at the bottom of the discharge roller group 414. The crushing filter 415 is wavy in shape and matches the bottom of the discharge roller group 414 at a corresponding position. A separation outlet 412 is opened at a height corresponding to the discharge roller group 414 on the side wall of the sand box 411 to facilitate the delivery of the castings. A cleaning brush 413 installed at the separation outlet 412 cleans the floating sand on the surface of the castings.

[0045] The air blowing head 219 blows the foundry sand deposited on the surface of the casting, so that it enters the gap of the discharge roller group 414 and then passes through the crushing filter 415 to enter the sand conveyor belt 42 to be transported out; when the foundry sand clumps, the discharge roller group 414 cooperates with the crushing filter 415 to knead the agglomerated foundry sand while rolling, thereby completing its crushing work and separating the casting from the foundry sand.

[0046] When the present invention is in use, first, the casting mold 5 enters the die feed section 1, is transported by the conveying wheel 102, and enters between the two adjustment plates 206 on the flipped lower sand section 2. When it reaches a certain position (which can be determined by a sensor), the eccentric wheel 207 on one side of the adjustment plate 206 rotates, so that the two adjustment plates 206 are pulled away from each other by the corresponding eccentric rod 208, so that under the connection action of the connecting rod 218, the sliding rod 213 pulls the corresponding two sliding blocks 211 away from each other, and the rollers at the ends of the positioning rail 212 and the lifting rod 214 roll and displace, so that the positioning pin 215 extends downward and enters the positioning sleeve 501 installed at the corresponding position on the side of the casting mold 5 to position the casting mold 5. At the same time, the hydraulic cylinder 220 extends until the end of the vibration plate 221 is in contact with the back of the casting mold 5. At this time, the adjustment plate 206 no longer supports the casting mold 5.

[0047] Then the driving gear 205 is driven to rotate, so that the turning drum 201 is driven to rotate 180 degrees under the meshing transmission action of the driving gear 205 and the transmission gear ring 204, so as to realize the turning of the casting mold 5. At this time, the cavity of the casting mold 5 is downward, and the vibration plate 221 is located above the back of the casting mold 5; under the action of gravity, the casting and most of the casting sand enter the inner cavity of the sand dividing box 411, and then the vibration plate 221 starts the vibration motor, and the vibration acts on the casting mold 5, so that the casting sand adhered to the cavity of the casting mold 5 falls off into the sand dividing box 411, and the vibration stops after a certain period of time, and the turning drum 201 continues to turn 180 degrees to return to the initial state;

[0048] After the turning drum 201 returns to the initial state, the eccentric wheel 207 rotates to make the two adjustment plates 206 move closer to each other to support the casting mold 5, and then the hydraulic cylinder 220 is recovered to the original position, and the positioning pin 215 also withdraws from the positioning sleeve 501 to release the positioning of the casting mold 5, and the closed chute 202 is driven again to send it out from the turning lower sand section 2 to the mold discharge section 3 and finally sent out; at the same time, air is ventilated into the blowing head 219 located at the bottom of the turning drum 201 to blow away the casting sand deposited on the surface of the casting, and then the discharge roller group 414 is driven to move to send the casting out from the separation outlet 412, and the casting sand separated by the discharge roller group 414 and the crushing filter 415 is sent out from the sand conveyor belt 42, thereby completing the entire process of separation of the casting and the casting sand.

[0049] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. Foundry sand unloading auxiliary device, characterized in that: The invention comprises a die-feeding section (1), a flipping sand-discharging section (2) and a die-discharging section (3); a sand-discharging assembly (4) is arranged below the flipping sand-discharging section (2); the die-feeding section (1) and the die-discharging section (3) are used to transport a casting mold (5); and the flipping sand-discharging section (2) and the sand-discharging assembly (4) are used to flip and discharge the casting mold (5) and separate the casting sand. The flip lower sand section (2) comprises a flip roller (201) which is rotatably arranged above the sand discharge assembly (4); a linkage positioning mechanism for supporting and positioning the casting mold (5) is arranged inside the flip roller (201); after the linkage positioning mechanism completes the positioning, the flipping and vibration unloading of sand is performed; The sand discharge assembly (4) mainly comprises a separation mechanism (41) and a sand conveyor belt (42). The separation mechanism (41) separates the casting and the casting sand. The casting sand is separated and enters the sand conveyor belt (42) to be discharged.

2. The foundry sand unloading auxiliary device according to claim 1, characterized in that: An adjustment plate (206) is slidably mounted at a symmetrical position on the inner wall of the turning drum (201); two rows of evenly arranged conveying wheels (102) are arranged on opposite side walls of the adjustment plate (206); the rotation directions of a pair of conveying wheels (102) located at upper and lower positions are opposite; the mold entry section (1) and the mold exit section (3) are also mounted with conveying wheels (102) for transporting the casting mold (5).

3. The foundry sand unloading auxiliary device according to claim 2, characterized in that: The two adjustment plates (206) are driven by an eccentric structure to move closer to and farther from each other. The eccentric structure includes an eccentric wheel (207) rotatably connected to the flip drum (201). The eccentric wheel (207) and the adjustment plate (206) are connected by an eccentric rod (208). One end of the eccentric rod (208) is fixed to the adjustment plate (206), and the other end is slidably connected to the eccentric wheel (207).

4. The foundry sand unloading auxiliary device according to claim 2, characterized in that: The linkage positioning mechanism comprises a positioning plate (210) fixed at positions close to both ends of the flip roller (201), two sliding blocks (211) are symmetrically slidably arranged in the positioning plate (210), a sliding rod (213) is fixed on the opposite side of the sliding block (211) and slides through the positioning plate (210), a connecting rod (218) is rotatably arranged at the end of the sliding rod (213), and one end of the connecting rod (218) away from the sliding rod (213) is hinged to the adjustment plate (206); The bottom of the positioning plate (210) is symmetrically telescopically provided with two positioning pins (215), a positioning track (212) is provided on the side of the slider (211), and a lifting rod (214) fixed at the bottom of the positioning pin (215) cooperates with the positioning track (212) to drive the positioning pin (215) to move up and down.

5. The foundry sand unloading auxiliary device according to claim 4, characterized in that: A floating block (217) is sleeved on the outer periphery of the positioning pin (215), and the floating block (217) is installed on the positioning pin (5) in a floating manner through a spring.

6. The foundry sand unloading auxiliary device according to claim 4, characterized in that: The top of the turning drum (201) is provided with an opening with an adjustable opening degree. A hydraulic cylinder (220) is fixedly mounted on the inner wall opposite to the opening of the turning drum (201). A vibrating plate (221) driven by a vibrating motor is fixed to the output end of the hydraulic cylinder (220). The vibrating plate (221) and the linkage positioning mechanism jointly position and turn over the casting mold (5).

7. The foundry sand unloading auxiliary device according to claim 6, characterized in that: The separation mechanism (41) is mounted and fixed on the top of the sand conveyor belt (42), and comprises a sand separation box (411), a discharge roller group (414) is horizontally arranged in the sand separation box (411), a crushing filter (415) is installed below the discharge roller group (414), a separation outlet (412) is opened at a height corresponding to the discharge roller group (414) on the side wall of the sand separation box (411), and a cleaning brush (413) is installed at the separation outlet (412).

8. The foundry sand unloading auxiliary device according to claim 7, characterized in that: The crushing filter screen (415) is wavy in shape and matches the bottom arc of a single discharge roller of the discharge roller group (414) at a corresponding position.

9. The foundry sand unloading auxiliary device according to claim 7, characterized in that: The top of the sand dividing box (411) is provided with an arc groove matching the arc of the turning roller (201), and driving rollers for supporting and transmitting the arc groove are rotatably installed near the two ends of the arc groove; the outer peripheral fixed sleeves of the turning roller (201) are provided with a transmission gear ring (204) near the two ends, and the corresponding position of the sand dividing box (411) is provided with a driving gear (205) driven by a motor, and the driving gear (205) is meshed with the driving gear ring (204) for transmission.

10. The foundry sand unloading auxiliary device according to claim 6, characterized in that: A plurality of blowing heads (219) are installed on the outer wall of the turning drum (201) away from the opening to blow air into the interior of the sand box (411).

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