An automated molding sand filling system

Abstract

The present invention discloses an automatic molding sand filling system, which includes a main track, a sand box vehicle frame, a sand feeding mechanism and a rail changing mechanism; the main track includes two sets of tracks for the sand box vehicle frame to move in different directions, and rail changing mechanisms for the sand box vehicle frame to change tracks are arranged at both ends of the two sets of tracks; the sand box vehicle frame includes a frame body rollingly installed on the main track, a vibration frame connected by a first elastic member and arranged above the frame body, and clamping mechanisms arranged at both ends and capable of moving up and down. When the clamping mechanisms are in the lowest position, the vibration frame and the sand box to be filled with sand can be fixed to the frame body together; this automatic molding sand filling system realizes the elastic connection between the sand box and the production line, avoids excessive vibration transmitted from the sand box to the production line, and can meet the continuous and uninterrupted production of the production line, effectively improving the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of automated casting equipment, and particularly to an automated molding sand filling system. Background Art

[0002] In the production of workpieces with complex shapes, the lost foam casting method is mostly used for production; before pouring, it is necessary to make a sand box. Different from the production of sand boxes in traditional casting production, due to the presence of lost foam inside, when filling sand, vibration needs to be used instead of traditional vibrating operations. Moreover, with the growth of production demand, mechanized production is mostly adopted. However, the existing mechanized sand filling has the following problems:

[0003] 1. In the existing sand filling line, since the position of the vibration mechanism is fixed, during the sand filling process, the sand box needs to be stationary for vibration, resulting in production intervals, affecting the overall line speed, and the efficiency needs to be improved;

[0004] 2. When the sand box stops waiting for vibration, it can only receive a single type of molding sand above it, and cannot meet the sand supply requirements of different layers and different types of molding sand;

[0005] 3. In the existing sand filling line, the sand box and the line body are rigidly connected. When the sand box receives vibration, a large amount of high-frequency vibration is transmitted to the line body, which has a certain impact on the stability of the line body.

[0006] Therefore, in view of the above problems, the existing sand filling line should be reformed and upgraded to overcome the above problems. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the existing defects, provide an automated molding sand filling system, realize the elastic connection between the sand box and the line body, avoid excessive vibration transmitted from the sand box to the line body, and be able to meet the continuous and uninterrupted production of the line body, effectively improving production efficiency, and can effectively solve the problems in the background art.

[0008] To achieve the above object, the present invention provides the following technical solution: an automated molding sand filling system, including a main track, a sand box carriage, a sand supply mechanism, and a rail changing mechanism;

[0009] The main track includes two sets of tracks for the sand box carriage to move in different directions, and rail changing mechanisms for the sand box carriage to change tracks are provided at both ends of the two sets of tracks;

[0010] The sand box carriage includes a carriage main body rollingly installed on the main track, a vibration frame connected by a first elastic member and arranged above the carriage main body, and clamping mechanisms arranged at both ends and capable of moving up and down. When the clamping mechanisms are in the lowest position, the vibration frame and the sand box to be filled with sand can be fixed to the carriage main body together;

[0011] A conical hole for positioning the sand box to be fixed is provided on the upper surface of the vibration frame;

[0012] Above one side of the track, several sets of sand feeding mechanisms for feeding sand are arranged;

[0013] The vibration mechanism is arranged on both sides of the track at the corresponding position of the sand feeding mechanism, and includes driving wheels installed in the form of swing arms. A vibration motor is arranged inside the swing arms. When the sand box to be filled with sand passes by, the driving wheels can clamp the sand box from both sides and vibrate.

[0014] As a preferred technical solution of the present invention, the clamping mechanism includes an upper clamping part and a lower clamping part. The upper clamping part includes a shaft body and a pressing plate at the top end of the shaft body. The lower clamping part is slidably installed on the shaft body, and a first elastic member is arranged between the lower clamping part and the main body of the vehicle frame in the vertical direction. The bottom end of the shaft body is connected with a first telescopic rod capable of vertically telescoping through a connecting rod. An arc-shaped groove is arranged perpendicular to the axis of the shaft body, and a pin shaft penetrating the arc-shaped groove is arranged inside the main body of the vehicle frame;

[0015] When the shaft body moves upward relative to the pin shaft, the top of the shaft body can tilt outward.

[0016] As a preferred technical solution of the present invention, the driving wheel is rotatably installed at the free end of the swing arm. The driving wheel is a hub motor, and a rubber thin sleeve is fixedly arranged on the circumferential surface of the driving wheel; a second telescopic rod is hinged in the middle section of the swing arm, and the length change of the second telescopic rod drives the swing arm to swing.

[0017] As a preferred technical solution of the present invention, track wheels are arranged on both sides of the main body of the vehicle frame. The track wheels are rollingly arranged above the track, and a track cover for covering the track and the track wheels is fixedly arranged above the track.

[0018] As a preferred technical solution of the present invention, the sand feeding mechanism includes a sand feeding hopper rotatably installed at one end along a horizontal axis. One end of the sand feeding hopper is communicated with an external molding sand supply mechanism, and a traction rope with a winding wheel is connected to the free end of the sand feeding hopper; by rotating the winding wheel, the traction rope is wound to change the inclination angle of the sand feeding hopper;

[0019] Scaly through holes are arranged on the lower wall surface of the sand feeding hopper.

[0020] As a preferred technical solution of the present invention, the rail changing mechanism includes a transverse track arranged horizontally. A driving frame driven to slide by a transverse push rod is slidably arranged on the transverse track. An auxiliary track corresponding to the main track is fixedly arranged on the driving frame. A longitudinal push rod capable of pushing the sand box vehicle frame from the auxiliary track to the main track is arranged inside one end of the rail changing mechanism.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: The present automated molding sand filling system has the following advantages compared with the existing sand filling line:

[0022] 1. It adopts a design in which the sand box vehicle frame is separated from the sand box, and an oscillating frame that can be elastically connected or rigidly connected is provided on the sand box vehicle frame. The oscillating frame and the sand box can be combined into one body. When the sand box receives vibration, the oscillating frame and the vehicle frame body can be elastically connected, and the vibration transmission between the two is less, having less impact on the line body; when the sand box is in a non-vibration-receiving state, the oscillating frame and the vehicle frame body are rigidly connected, and the two have good stability, and it is not easy to change the position when placing the core inside.

[0023] 2. It adopts a design combining two parallel main tracks and a rail changing mechanism to realize the closed loop of the track, and the sand box vehicle frame can form a circular motion inside to achieve the continuity of production.

[0024] 3. The vibration motors are integrated in the swing arms on both sides and act together with the drive wheels. That is, the drive wheels can not only drive the sand box to feed, but also transmit vibration, realizing the vibration of the sand box without stopping the machine, that is, feeding, filling sand, and vibrating at the same time. Combining with different groups of lower sand hoppers at the top, it realizes the layered continuous filling of different types of molding sand to meet the filling requirements of various filling methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the present invention;

[0026] Figure 2 is the front view of the structure of the present invention;

[0027] Figure 3 is the top view of the structure of the present invention;

[0028] Figure 4 is a schematic diagram of the combination of the sand box, the sand box vehicle frame and the vibration mechanism of the present invention;

[0029] Figure 5 is a schematic diagram of the sand box vehicle frame and the vibration mechanism of the present invention;

[0030] Figure 6 is a sectional view taken along line A-A of the present invention;

[0031] Figure 7 is a sectional view taken along line B-B of the present invention;

[0032] Figure 8 is a sectional view taken along line C-C of the present invention;

[0033] Figure 9 is a sectional view taken along line D-D of the present invention;

[0034] Figure 10 is a sectional view taken along line E-E of the present invention;

[0035] Figure 11 Schematic diagram of the lower sand mechanism of the present invention;

[0036] Figure 12 Schematic diagram of the lower wall of the lower sand hopper of the present invention;

[0037] Figure 13 Schematic diagram of the clamping mechanism of the present invention;

[0038] Figure 14 Top view of the combination of the sand box, the sand box frame and the vibration mechanism of the present invention.

[0039] In the figure: 1, main track; 101, track cover; 2, sand box frame; 201, frame main body; 202, vibration frame; 203, upper clamping part; 204, lower clamping part; 205, first elastic member; 206, track wheel; 207, second elastic member; 208, first telescopic rod; 209, connecting rod; 3, lower sand mechanism; 301, lower sand hopper; 302, wire winding wheel; 4, rail changing mechanism; 401, transverse track; 402, transverse push-pull rod; 403, longitudinal push-pull rod; 5, sand box; 6, vibration mechanism; 601, drive wheel; 602, swing arm; 603, vibration motor; 604, second telescopic rod. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] Please refer to Figures 1 - 3 , the present invention provides a technical solution: an automatic molding sand filling system, including a main track 1, a sand box frame 2, a lower sand mechanism 3 and a rail changing mechanism 4;

[0042] The main track 1 includes two sets of tracks for the sand box frame 2 to move in different directions, and rail changing mechanisms 4 for the sand box frame 2 to change tracks are provided at both ends of the two sets of tracks;

[0043] When the sand box 5 and the sand box frame 2 move together or the sand box frame 2 moves alone to the position of the rail changing mechanism 4, the position of the sand box frame 2 on the two main tracks 1 is switched through the action of the rail changing mechanism 4.

[0044] The flask frame 2 includes a frame body 201 that is rotatably mounted on the main track 1, a vibrating frame 202 that is connected by a first elastic member 205 and arranged above the frame body 201, and a clamping mechanism arranged at both ends and capable of moving up and down. When the clamping mechanism is in the lowest position, it can fix the vibrating frame 202 and the flask to be filled with sand together with the frame body 201.

[0045] By the movement of the clamping mechanism, the switching between rigid fixation and elastic fixation between the flask 5 and the frame body 201 is realized.

[0046] A tapered hole for positioning the flask to be fixed is provided on the upper surface of the vibrating frame 202.

[0047] Four groups of feet for support are arranged at the bottom of the flask 5. The feet adopt a frustum structure. When the flask 5 is combined with the vibrating frame 202, the feet at the bottom of the flask 5 can be inserted into the vibrating frame 202, playing a role in mutual positioning of the two, and cooperating with the clamping mechanism to realize the relative stability of the flask 5 with the vibrating frame 202 and the frame body 201.

[0048] Several groups of sand feeding mechanisms 3 for sand feeding are arranged above one side of the track.

[0049] By connecting the sand feeding mechanism 3 with different external sand supply mechanisms, the sand feeding of different molding sands is realized.

[0050] The vibration mechanism 6 is arranged on both sides of the track corresponding to the sand feeding mechanism 3, and includes a driving wheel 601 installed in the form of a swing arm 602. A vibration motor 603 is arranged in the swing arm 602. When the flask to be filled with sand passes by, the driving wheel 601 can clamp the flask from both sides and vibrate it.

[0051] Integrating the driving mechanism and the vibration source into one, the driving wheel 601 can not only drive the flask 5 to feed, but also provide vibration for the flask 5, realizing the functions of filling sand, feeding, and vibrating for the flask 5 at the same time, enabling the flask 5 not to wait statically for filling sand and vibrating, ensuring the continuous feeding of the whole line body, and thus improving the production efficiency.

[0052] Refer to Figure 6 and Figure 13 The clamping mechanism includes an upper clamping part 203 and a lower clamping part 204. The upper clamping part 203 includes a shaft body and a pressing plate at the top of the shaft body. The lower clamping part 204 is slidably installed on the shaft body, and a first elastic member 205 is arranged vertically between the lower clamping part 204 and the frame body 201. The bottom end of the shaft body is connected by a connecting rod 209 to a first telescopic rod 208 capable of vertical telescoping. An arc-shaped groove is arranged perpendicular to the axis of the shaft body, and a pin shaft passing through the arc-shaped groove is arranged in the frame body 201.

[0053] When the shaft body moves upward relative to the pin shaft, the top of the shaft body can tilt outward.

[0054] Refer to Figure 6 When the sand box 5 does not need to vibrate, the first telescopic rod 208 is pulled down, driving the upper clamping part 203 to press down. At this time, under the action of the first elastic member 205, the lower clamping part 204 and the upper clamping part 203 act together to drive the sand box 5 to move downwards, and compress the second elastic member 207. At the same time, the clamping mechanisms at both ends act synchronously, thereby fixing the sand box 5 to the frame body 201. At this time, the two have a relatively stable relative relationship, and the sand box 5 will not shake with the feeding of the frame body 201, meeting the production requirements; when filling sand, only the first telescopic rod 208 needs to extend, driving the upper clamping part 203 to move upwards. At this time, affected by the arc-shaped groove in the upper clamping part 203, the upper end of the upper clamping part 203 tilts outwards. At this time, the clamping mechanism is disengaged from the sand box 5. At this time, the second elastic member 207 is released, and the vibrating frame 202 and the frame body 201 form a flexible connection through the second elastic member 207. When the sand box 5 receives vibration, through the deformation energy storage of the second elastic member 207, the transmission of vibration to the frame body 201 is reduced, thereby preventing the entire line body from vibrating accordingly and avoiding the increase in fatigue caused by the resonance of internal parts, effectively improving the stability and durability of the production line.

[0055] Refer to Figure 4 、 Figure 5 、 Figure 9 and Figure 14 The driving wheel 601 is rotatably installed at the free end of the swing arm 602. The driving wheel 601 is a hub motor, and a rubber thin sleeve is fixedly arranged on the circumferential surface of the driving wheel 601; a second telescopic rod 604 is hinged in the middle of the swing arm 602. By changing the length of the second telescopic rod 604, the swing arm 602 is driven to swing;

[0056] Integrating the driving part and the vibrating part enables the driving wheel 601 at the front end of the vibrating mechanism 6 to not only drive the sand box 5 to feed, but also provide vibration for the sand box 5, meeting the requirement of feeding while vibrating;

[0057] By changing the length of the second telescopic rod 604 hinged at both ends, the swing arm 602 is driven to swing, thereby ensuring the normal pressure and friction force between the driving wheel 601 and the outer wall of the sand box 5. When the vibrating motor 603 works, through the transmission of the swing arm 602 and the driving wheel 601, the vibration is transmitted to the sand box 5;

[0058] And a rubber thin sleeve is arranged on the circumferential surface of the driving wheel 601, effectively increasing the friction force between the driving wheel 601 and the side wall of the sand box 5, and the amount of vibration it absorbs is limited and will not affect the transmission of vibration.

[0059] Refer to Figure 8, track wheels 206 are provided on both sides of the frame body 201. The track wheels 206 are rotatably arranged above the track, and a track cover 101 for covering the track and the track wheels 206 is fixedly arranged above the track.

[0060] During the sand filling operation, the molding sand falls freely from the top, and part of it will float to the surface of the track and accumulate. When the frame body 201 passes by, the molding sand fills between the track wheels 206 and the track, which will increase the wear between the two. Therefore, adding the track cover 101 to shield the track can prevent the molding sand from piling up on the track surface.

[0061] Refer to Figure 2 and Figure 11 , the lower sand mechanism 3 includes a lower sand hopper 301 rotatably installed at one end along the horizontal axis. One end of the lower sand hopper 301 is connected to an external molding sand supply mechanism, and the free end of the lower sand hopper 301 is connected to a traction rope with a winding wheel 302; by rotating the winding wheel 302, the traction rope is driven to wind, changing the inclination angle of the lower sand hopper 301;

[0062] Connect the rotating end of the lower sand hopper 301 to the upper sand discharging hopper. The molding sand in the sand discharging hopper can enter the lower sand hopper 301 under the action of gravity, and then be discharged from the tail end of the lower sand hopper 301 and fall into the sand box 5. During the sand filling process, by rotating the winding wheel 302, the winding amount of the traction rope is changed, driving the inclination of the lower sand hopper 301, that is, changing the flow rate of the internal molding sand. When the outlet height of the lower sand hopper 301 is higher than the inlet, the sand filling is stopped at this time to achieve precise control of the sand filling speed;

[0063] During sand filling, the existing sand discharging port at the bottom of the sand discharging hopper is single-point sand discharging, that is, a sand pile is formed in the sand box 5. Subsequently, under the action of vibration, it collapses around, thus completing the sand filling. However, when the sand and gravel flow, they have a certain amount of friction. It takes a long vibration time and vibration energy input from the collapse of the sand pile to uniform compaction;

[0064] Refer to Figure 12 , the lower wall surface of the lower sand hopper 301 is provided with fish-scale-shaped through holes;

[0065] By setting the fish-scale-shaped through holes, when the molding sand passes through the lower wall surface, part of it is intercepted by the fish-scale-shaped convex part and falls through the observation hole, and the remaining part continues to flow downward and is intercepted and falls by the next group of fish-scale-shaped through holes. Thus, the concentrated sand discharging point of the sand discharging hopper is transformed into uniform scattered sand, thereby realizing uniform sand filling of the sand box 5, avoiding the sand pile problem caused by single-point sand filling, achieving uniform sand filling, and can be compacted with a shorter time and a smaller vibration input amount, thus effectively improving the vibration effect and meeting the fast rhythm of pipeline production.

[0066] Refer to Figure 1 、 Figure 2 and Figure 3, the rail-changing mechanism 4 includes a horizontally arranged horizontal rail 401. A driving frame driven to slide by a horizontal push rod 402 is slidably arranged on the horizontal rail 401. An auxiliary rail corresponding to the main rail 1 is fixedly arranged on the driving frame. A longitudinal push rod 403 capable of pushing the sand box carriage 2 to move from the auxiliary rail to the main rail 1 is arranged in the rail-changing mechanism 4 at one end;

[0067] When the carriage main body 201 passes through the main rail 1 in the sand feeding area, the sand box 5 can be fed forward under the action of the driving wheel 601. After the sand box 5 exits this area, the sand box 5 and the sand box carriage 2 itself do not have a power mechanism and need to be pushed forward by the subsequent sand box carriage 2. When it moves to the position of the auxiliary rail of the rail-changing mechanism 4, through the acquisition of sensor information installed at this position, it notifies the downstream process robot to act and take away the sand box 5. Subsequently, under the action of the horizontal push rod 402, the driving frame and the sand box carriage 2 are driven to switch to the corresponding position of another main rail 1 together. At this time, under the action of the longitudinal push rod 403, the sand box carriage 2 is pushed to feed forward on another main rail 1, and the empty sand box is placed on another main rail 1, so as to realize the cyclic feeding of the sand box carriage 2 on the main rail 1.

[0068] The push rod referred to in this application is preferably a cylinder or a hydraulic cylinder. The first telescopic rod 208 is preferably an electric telescopic rod, which is powered by a carbon brush to reduce the design difficulty of the air pipe and the oil pipe. The second telescopic rod 604 is preferably a cylinder or a hydraulic cylinder, and the wire winding wheel 302 is driven by a motor. According to the feeding speed of the sand box 5 in the sand feeding area, the winding amount of the wire winding wheel 302 is adjusted. The winding amount of the traction rope is inversely proportional to the volume of the sand box 5 and inversely proportional to the feeding speed of the sand box 5.

[0069] Refer to Figure 7 and Figure 10 , when designing the sand box 5, four groups of frustum-shaped protrusions are arranged at the bottom of the sand box 5. When the sand box 5 is placed on the ground, it can play a supporting role. When assembled with the vibrating frame 202, it can be matched and positioned with the conical hole of the vibrating frame 202;

[0070] At the same time, V-shaped positioning grooves are arranged at both ends of the bottom side of the sand box 5, and the contact surface between the lower clamping part 204 and the sand box 5 is designed as a V-shaped block structure. When the lower clamping part 204 is combined with the sand box 5, the two have a good relative position relationship, ensuring that the clamping position is fixed each time, and the coating treatment can be carried out on this position of the sand box 5 specifically to increase the wear resistance of this position.

[0071] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automated molding sand filling system, comprising a main track (1), a sand box carriage (2), a sand feeding mechanism (3) and a rail changing mechanism (4). It is characterized in that: The main track (1) includes two sets of tracks for the sand box carriage (2) to move in different directions, and rail changing mechanisms (4) for the sand box carriage (2) to change tracks are arranged at both ends of the two sets of tracks. The sand box carriage (2) includes a carriage main body (201) rollingly installed on the main track (1), a vibrating frame (202) connected by a first elastic member (205) and arranged above the carriage main body (201), and clamping mechanisms arranged at both ends and capable of moving up and down. When the clamping mechanisms are at the lowest position, the vibrating frame (202) and the sand box to be filled with sand can be fixed to the carriage main body (201) together. The upper surface of the vibrating frame (202) is provided with a tapered hole for positioning the sand box to be fixed. Several sets of sand feeding mechanisms (3) for sand feeding are arranged above one side of the track. A vibrating mechanism (6) is arranged on both sides of the track at the corresponding position of the sand feeding mechanism (3), and includes a driving wheel (601) installed in the form of a swing arm (602), and a vibrating motor (603) is arranged in the swing arm (602). When the sand box to be filled with sand passes by, the driving wheel (601) can clamp the sand box from both sides and vibrate it. The clamping mechanism includes an upper clamping part (203) and a lower clamping part (204). The upper clamping part (203) includes a shaft body and a pressing plate at the top of the shaft body. The lower clamping part (204) is slidably installed on the shaft body, and a first elastic member (205) is arranged between the lower clamping part (204) and the carriage main body (201) in the vertical direction. The bottom end of the shaft body is connected by a connecting rod (209) to a first telescopic rod (208) capable of vertical telescoping. An arc-shaped groove is arranged perpendicular to the axis of the shaft body, and a pin shaft passing through the arc-shaped groove is arranged in the carriage main body (201). When the shaft body moves upward relative to the pin shaft, the top of the shaft body can tilt outward.

2. The automated molding sand filling system according to claim 1, It is characterized in that: The driving wheel (601) is rotatably installed at the free end of the swing arm (602). The driving wheel (601) is a hub motor, and a rubber thin sleeve is fixedly arranged on the circumferential surface of the driving wheel (601). A second telescopic rod (604) is hinged in the middle section of the swing arm (602), and the swing of the swing arm (602) is driven by the change of the length of the second telescopic rod (604).

3. The automated molding sand filling system according to claim 1, It is characterized in that: Track wheels (206) are arranged on both sides of the carriage main body (201). The track wheels (206) are rollingly arranged above the track, and a track cover (101) for covering the track and the track wheels (206) is fixedly arranged above the track.

4. The automated molding sand filling system according to claim 1, It is characterized in that: The lower sand feeding mechanism (3) includes a lower sand hopper (301) rotatably installed at one end along a horizontal axis. One end of the lower sand hopper (301) is communicated with an external molding sand supply mechanism, and the free end of the lower sand hopper (301) is connected with a towing rope with a winding wheel (302); by rotating the winding wheel (302), the towing rope is driven to wind, and the inclination angle of the lower sand hopper (301) is changed; Scaly through holes are arranged on the lower wall surface of the lower sand hopper (301).

5. The automatic molding sand filling system according to claim 1, characterized in that: The rail changing mechanism (4) includes a transverse rail (401) arranged horizontally. A driving frame driven to slide by a transverse push rod (402) is slidably arranged on the transverse rail (401). An auxiliary rail corresponding to the main rail (1) is fixedly arranged on the driving frame. A longitudinal push rod (403) capable of pushing the sand box vehicle frame (2) to move from the auxiliary rail to the main rail (1) is arranged in the rail changing mechanism (4) at one end.

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