Sand box tipping device

Abstract

The present application provides a sand box tipping device, a bracket for receiving a sand box A is rotatably arranged in a machine box, an open part for placing and taking out the sand box is arranged on the front side of the machine box, a machine box door is arranged at the open part, a discharge chute is arranged at the lower part of the machine box on the sand box tipping side, and a smoke exhaust port is arranged at the upper part of the machine box on the sand box tipping side. The machine box is arranged, an open part area is reserved at the front side or the upper position of the front part of the machine box, the bracket arranged in the machine box can rotate, the open part is arranged to provide a working space when the sand box is placed on the bracket or taken away from the bracket, the position and size of the open part can be adapted to the size and position of the bracket and the sand box, the machine box door is also adapted to the position and size of the open part, and the open part is completely blocked when the machine box door is closed. When the bracket is rotated to discharge material, dust is restrained and gathered in the machine box.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of casting, and particularly relates to a turnover device of a sand box using a coated sand mold to cast microspheres. BACKGROUND

[0002] In the production of microspheres and other micro parts using a coated sand mold, the prior art has adopted a buried sand negative pressure pouring method, that is, a proper number of unit molds are attached together, and the end plates and connecting rods of the end plates are used as clamps to fix them as a group of pouring molds, that is, a coated sand mold. The pouring molds are placed in the box, and then the filling sand is buried. The filling sand can be ordinary external sand. The pouring mold is completely buried in the filling sand, and the filling sand is filled to the height of the box mouth, and a layer of film is attached on it.

[0003] In the actual production pouring process, after pouring is completed and cooled, the clamp holding the coated sand mold is lifted out of the sand box together with the coated sand mold and placed on the ground. A large number of cast products are also lifted out. Due to the ablation of high temperature on the coated sand mold made of resin, the rupture of the coated sand mold is inevitable, so part of the microsphere cast product is mixed in the filling sand in the sand box. The sorting efficiency is low and the labor intensity is large.

[0004] After pouring is completed, a large amount of external sand, that is, filling sand, carbonized and fallen coated sand mold residues, and pressure film sand are mixed together. The external sand is difficult to recycle and reuse, increasing the manufacturing cost of the product. In order to pour again, the sand box needs to be emptied before being loaded. In order to avoid using an electric hoist or a traveling crane and hooking a lifting ring or a hanging shaft pin on the outer wall of the sand box with a steel wire rope to lift one side of the sand box to make the sand box tilt, a large amount of cleaning and transporting operation is required. The applicant has previously applied for an invention patent with the title of "Casting sand box turnover device" (application number 201921537548.4). The rotating disc is rotatably arranged on the fixed disc seat, and the rotating shaft core is located horizontally. One end of the first and second inserting teeth is connected with the rotating disc, and the first and second inserting teeth are arranged at intervals and extend in the same direction in a suspended manner. When operating, the casting sand box turnover device is arranged on a tool vehicle such as a forklift, and the sand box is turned over, so that the sand and the workpiece can be poured out. Since the casting sand box turnover device needs to be used in cooperation with a tool vehicle such as a forklift or a device during operation, the operation process cannot meet the requirements of fast separation of sand and workpiece, that is, casting sand and dust, and the dust phenomenon is serious during the tilting process, which cannot meet the environmental protection requirements.

[0005] Similarly, the patent document entitled "Sand box tipping device" (CN 103551552 B) discloses a sand box tipping device comprising a base 1, a sand box tipping power device, and a tipping frame composed of a bottom plate 41, a top plate 40, a left side plate 42 and a right side plate 43 connecting the bottom plate 41 and the top plate 40. The lower ends of the left and right side plates 42 and 43 of the tipping frame are provided with tipping shafts 2, which are movably arranged on the base 1 through a pair of bearings. An arc-shaped limiting groove 31 is arranged on the inner hole wall of a limiting ring 3, which is in limiting cooperation with a limiting boss 21 on the tipping shaft 2. A sand box locking device is arranged on the top plate 40 of the tipping frame. The technical solution disclosed in the document not only causes serious dust emission due to the open structure, which cannot meet the environmental protection requirements, but also has a too complex structure of the sand box locking device. Moreover, the sand box locking device is located in the dust emission link, and the locking screw rod is exposed to a serious dust environment, which cannot guarantee the service life. In addition, the locking power is provided by a screw rod reducer 6 and a locking motor 7, which are attached to the tipping frame and will be turned together, resulting in an excessive load. SUMMARY

[0006] The purpose of the present application is to provide a sand box tipping device for casting, which can ensure the controllability of the sand box posture during tipping operation and effectively collect the dust emission during tipping of the sand box.

[0007] To achieve the above-mentioned purpose of the application, the following technical solution is adopted: a machine case is provided, a bracket for receiving a sand box is rotatably arranged in the machine case, an open part for placing and taking out the sand box is arranged on the front side of the machine case, a discharge chute is arranged on the lower part of the machine case on the sand box tipping side, and a smoke discharge port is arranged on the upper part of the machine case on the sand box tipping side.

[0008] A sand box locking mechanism is arranged on the bracket, the sand box locking mechanism comprises a locking shaft, a ratchet wheel is connected to the locking shaft rotatably arranged on a locking shaft seat, a ratchet pawl arranged on the locking shaft seat and the ratchet wheel form a ratchet and pawl mechanism, and one end of a locking rope is connected to the locking shaft and the other end is used for hanging and buckling on the sand box.

[0009] A rotating shaft is arranged on the bracket, the rotating shaft is rotatably arranged on a shaft seat and one shaft end extends to the outside of the machine case and is connected to a power driving mechanism.

[0010] The sand box locking mechanisms are arranged on both ends of the bracket to which the rotating shaft extends, the locking shaft is arranged perpendicularly to the rotating shaft, the locking shaft is hinged on two vertical plates arranged at intervals to form a locking shaft seat, and the locking rope is connected to the shaft body section of the locking shaft between the two vertical plates.

[0011] The open part is an open area exposing the upper part and both ends of the bracket, and an on-off type machine case door is arranged at the open part.

[0012] In the technical scheme, the machine case is provided, the open part area is reserved at the front side or the front upper position of the machine case, the bracket arranged in the machine case can rotate, the open part is arranged to provide the operation space when the sand box is placed on the bracket or taken away from the bracket, the position and size of the open part are matched with the size and position of the bracket and the sand box, when the fan works, the dust is restrained and gathered in the machine case and discharged through the smoke exhaust port connected with the dust removal pipeline, the dust is effectively collected, and the phenomenon that the dust is scattered is avoided when the sand particles and the castings are poured out of the sand box. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1a 、 1b , 1c is a perspective structural schematic diagram of the application;

[0014] Figure 1d is a structural schematic diagram of the application;

[0015] Figure 2 is a partial enlarged schematic diagram in Figure 1a ;

[0016] Figure 3 is a perspective structural schematic diagram of the sand box A placed on the bracket;

[0017] Figure 4 is a perspective structural schematic diagram of the bracket;

[0018] Figure 5 is a perspective structural schematic diagram of the case door. DETAILED DESCRIPTION

[0019] The sand box tipping device shown in Figure 1a 、 1b , 1c and 1d, the bracket 30 for receiving the sand box A is rotatably arranged in the machine case 10, the open part 11 for placing and taking out the sand box is arranged at the front side of the machine case 10, the opening and closing type machine case door 20 is arranged at the open part 11, the discharge chute 40 is arranged at the lower part of the machine case 10 on the sand box tipping side, and the smoke exhaust port 50 is arranged at the upper part of the machine case 10 on the sand box tipping side.

[0020] The sand box A after casting is hoisted to the sand box tipping device provided by the application and placed on the bracket 30 from the open part 11, the bracket 30 is driven to rotate and tilt by an appropriate angle, the buried sand, the coated sand type sand and the casting dust in the sand box A are poured down together with the castings and then conveyed to the downstream sand and casting screening device to implement the sand particle separation and the casting collection work. Since the process of tilting and pouring the sand box is completed in the corresponding closed environment, the dust is gathered and restrained in the machine case 10 and cannot escape everywhere, is collected and treated by the dust removal smoke pipe connected with the smoke exhaust port 50, and the working environment meets the environmental protection requirements.

[0021] As shown in FIG. 1-4, the bracket 30 is provided with a rotating shaft 31, which is rotatably arranged on a shaft seat and has one end extending to the outside of the cabinet 10 and connected with the power driving mechanism 90. The power driving mechanism 90 includes a motor and a speed reducer, and is arranged outside the cabinet 10 to avoid the influence of dust and ensure the reliability of operation. Meanwhile, the volume of the cabinet 10 can be designed more compactly, i.e. the volume of the cabinet 10 is appropriate to facilitate the accommodation of the sand box A and ensure the moderate space for the tilting action and the arrangement of the discharge chute 40.

[0022] As shown in FIG. 1-4, the bracket 30 is provided with a rotating shaft 31, which is rotatably arranged on a shaft seat and has one end extending to the outside of the cabinet 10 and connected with the power driving mechanism 90. The power driving mechanism 90 includes a motor and a speed reducer, and is arranged outside the cabinet 10 to avoid the influence of dust and ensure the reliability of operation. Meanwhile, the volume of the cabinet 10 can be designed more compactly, i.e. the volume of the cabinet 10 is appropriate to facilitate the accommodation of the sand box A and ensure the moderate space for the tilting action and the arrangement of the discharge chute 40. Figure 4 As shown in FIG. 1-4, the bracket 30 is provided with a rotating shaft 31, which is rotatably arranged on a shaft seat and has one end extending to the outside of the cabinet 10 and connected with the power driving mechanism 90. The power driving mechanism 90 includes a motor and a speed reducer, and is arranged outside the cabinet 10 to avoid the influence of dust and ensure the reliability of operation. Meanwhile, the volume of the cabinet 10 can be designed more compactly, i.e. the volume of the cabinet 10 is appropriate to facilitate the accommodation of the sand box A and ensure the moderate space for the tilting action and the arrangement of the discharge chute 40.

[0023] The bottom frame 32 has a vertically arranged stop bar 34 on the long side of the lower side during tilting. The stop bar 34 is arranged at the middle section of the long side of the bottom frame 32. Figure 4 As shown in FIG. 1-4, the bracket 30 is provided with a rotating shaft 31, which is rotatably arranged on a shaft seat and has one end extending to the outside of the cabinet 10 and connected with the power driving mechanism 90. The power driving mechanism 90 includes a motor and a speed reducer, and is arranged outside the cabinet 10 to avoid the influence of dust and ensure the reliability of operation. Meanwhile, the volume of the cabinet 10 can be designed more compactly, i.e. the volume of the cabinet 10 is appropriate to facilitate the accommodation of the sand box A and ensure the moderate space for the tilting action and the arrangement of the discharge chute 40.

[0024] The stop bar 34 is mainly arranged based on the following considerations: first, when the hoisted sand box A is seated on the bracket 30, the surrounding area of the long side side bar 33a and the short side side bar 33b basically matches the circumferential wall of the bottom of the sand box A, and it is difficult to avoid the swinging phenomenon during hoisting, which leads to the difficulty of direct seating; the stop bar 34 first receives unilateral constraint and resistance when the sand box A falls and approaches the long side side bar 33a and the short side side bar 33b, which facilitates the alignment and approach of the long side side bar 33a on the side where the stop bar 34 is located, and the sand box A can be seated on the bottom frame 32 as long as the short end of the sand box A is properly adjusted to align with the short side side bar 33b; second, during tilting, the gravity of the sand box A and its contents is biased to the side of the long side side bar 33a on the low side, and the stop bar 34 plays a supporting role at this time, and the supporting role of the stop bar 34 increases with the increase of the tilting angle, which ensures the safe fixation of the sand box A on the bracket 10. In addition, it should be noted that the height of the stop bar 34 should be moderate, i.e. not higher than the height of the sand box A, so as not to block the material falling.

[0025] The above-mentioned bracket 30 is not involved in the locking mechanism of the sand box A, because there are various ways to lock the sand box A on the bracket 30 to ensure that the tilting sand box A has been securely fixed on the bracket 30. The preferred scheme of the sand box locking mechanism 70 provided on the bracket 30 is described below, that is, the sand box locking mechanism 70 is provided on the bracket 30 as an accessory, and the sand box locking mechanism 70 comprises a locking shaft 71, a ratchet 72 connected to the locking shaft 71 rotatably arranged on a locking shaft seat 73, a pawl 74 arranged on the locking shaft seat 73 and forming a ratchet and pawl mechanism with the ratchet 72, and a locking rope 75 having one end connected to the locking shaft 71 and the other end used for hanging on the sand box A. In specific implementation, the pawl 74 and the ratchet 72 are arranged at one end of the locking shaft 71 and outside the locking shaft seat 73, which is the preferred scheme.

[0026] When the sand box A is seated on the bracket 30, the locking rope 75 is buckled on the sand box A, and then the locking shaft 71 is rotated. The locking rope 75 is wound on the locking shaft 71 and is pulled tight, so that the bottom of the sand box A is tightly pressed on the bracket 30. At this time, the locking state is locked by the mutual cooperation of the pawl 74 and the ratchet 72, which avoids the rotation of the locking shaft 71 in the direction of loosening the locking rope 75. After the pouring of the sand is completed, the bracket 30 is rotated to the initial position in which the whole is flat. The locking shaft 71 is further rotated in the direction of pulling the locking rope 75, so that the pawl 74 is separated from the tooth valley of the ratchet 72, and the locking shaft 71 is reversely rotated to loosen the locking rope 75 until the locking rope 75 is disconnected from the sand box A.

[0027] Under the joint action and constraint of the sand box locking mechanism 70, the stop rod 34, and the long side rail 33a and the short side rail 33b, the sand box A can be conveniently seated on the bracket 30 and reliably locked, and can also be quickly unlocked and lifted out.

[0028] It should be noted that, in order to ensure the reliability of the locking connection, the sand box locking mechanism 70 is provided on the short side of the bracket 30. Specifically, the two ends of the bracket 30 to which the rotating shaft 31 extends are provided with the sand box locking mechanism 70. The locking shaft 71 is arranged perpendicularly to the rotating shaft 31. The locking shaft 71 is hinged to two vertical plates 731 constituting the locking shaft seat 73. The shaft body section of the locking shaft 71 between the two vertical plates 731 is connected to the locking rope 75.

[0029] The above-mentioned scheme not only provides reliable rotating and hinging support for the locking shaft 71, but also ensures that there is a suitable part on the locking shaft 71 for connecting the locking rope 75, which provides reliable bending strength when the locking shaft 71 is arranged around the locking rope 75 and pulls the locking rope 75 tight.

[0030] As a preferred solution, the locking rope 75 is a ring-shaped steel wire rope, which is twisted into an 8-shaped form, and one end of the locking rope 75 is connected to the locking shaft 71, and the other end is buckled to the T-shaped lifting lug A1 arranged on the side wall of the sand box A. As shown in Figure 2 、 3 , the natural state of the locking rope 75 is a ring-shaped loop, which can be easily twisted into an 8-shaped form. When the locking shaft 71 is in the appropriate position, the loop hole of the one end of the locking rope 75 twisted into an 8-shaped form can be conveniently hung or buckled to the T-shaped lifting lug A1 arranged on the side wall of the sand box A. Due to the natural tension of the steel wire rope, the state of being hung and buckled to the T-shaped lifting lug A1 can be moderately maintained without separation, and then the locking shaft 71 is rotated to tighten the locking rope 75 to lock the sand box A.

[0031] To avoid the accidental loosening of the reverse check valve cooperation between the pawl 74 and the ratchet wheel 72, the application also provides a safety setting for the ratchet wheel and pawl mechanism, that is, a locking spring 76 is arranged between the locking shaft seat 73 and the pawl 74, and the elastic force provided by the locking spring 76 drives the pawl 74 to rotate to the side where the ratchet wheel 72 is located. Although the locking spring 76 is added, the operation of releasing the cooperation state of the ratchet wheel and pawl mechanism is still very convenient.

[0032] In order to reliably fix the locking rope 75, the application adopts the following preferred solution, that is, the locking shaft 71 has a connecting ring 711, and the annular locking rope 75 is buckled on the connecting ring 711. In specific implementation, first, a curved rod is provided and placed across the rope of the locking rope 75, and then the two ends of the curved rod are welded on the locking shaft 71 to form the buckle connection between the connecting ring 711 and the locking rope 75.

[0033] In order to ensure that the angle of rotation of the shaft 31 is appropriate to realize the complete dumping of the sand and the part, and without the need to make the sand box A present a large angle of turning with the box mouth downward, that is, to ensure that the sand box A presents a box mouth inclined downward, without turning 180 degrees, it is necessary to provide a preferred limit setting of the turning angle, that is, the shaft end of the shaft 31 extending to the outside of the cabinet 10 is provided with a short column 311, and the turning path of the short column 311 is arranged with a turning angle limiting sensor 80. When the above-mentioned turning angle limiting sensor 80 contacts the short column 311, the sand box A presents a posture with the box mouth inclined downward, and stops rotating at this time. At this time, the sand and the part have been completely dumped and cleaned.

[0034] As shown in Figure 1a 、 1b, 1c, 1d, the open part 11 on the case 10 is an open area exposing the upper part and both ends of the bracket 30, and the open part 11 is provided with an opening and closing case door 20. Whether to set the case door 20 can be determined according to the size of the fan power. If the exhaust capacity is sufficient, the case door 20 can not be set. In the case of limited power, the fan power is small, and the case door 20 can be set to ensure the dust collection effect.

[0035] Meanwhile, in combination with Figure 5 As shown in the drawings, the case door 20 includes two side plates 21, and the upper edges of the side plates 21 are provided with a top plate 22. The side plates 21 and the top plate 22 form a downward opening groove type. The lower edges of the side plates 21 are provided with a track 60 for the translation of the side plates 21. The guide direction of the track 60 is horizontal and parallel to the two side walls of the case 10. The door plate 23 for shielding the front end area of the downward opening groove type formed by the side plates 21 and the top plate 22 is arranged at the front end part of the downward opening groove type formed by the side plates 21 and the top plate 22 or the front side part of the case 10.

[0036] The door plate 23 can also be a structure of a double-leaf door and is connected to the vertical front plate edge of the side plate 21, of course, it can also be fixed to the lower front edge of the open part 11 of the front side part of the case 10.

[0037] The front edge of the top plate 22 is hingedly connected with the door plate 23. The case door 20 formed by the door plate 23, the side plate 21 and the top plate 22 is moved to the front position to shield the open part 11 area of the case 10 or moved to the rear position to expose the open part 11 area. As shown in Figure 1a 、 1c As shown in the drawings, the position of the case door 20 is moved to the rear position and the door plate 23 is lifted up, Figure 1b As shown in the drawings, the position of the case door 20 is moved to the rear position and the door plate 23 is lifted up,

Claims

1. A flask tipping device characterised in that: The sand box locking mechanism (70) is arranged on the bracket (30), the sand box locking mechanism (70) comprises a locking shaft (71), the locking shaft (71) is rotatably arranged on a locking shaft seat (73), a ratchet wheel (72) is connected to the locking shaft (71), a ratchet pawl (74) arranged on the locking shaft seat (73) and the ratchet wheel (72) constitute a ratchet and pawl mechanism, one end of a locking rope (75) is connected to the locking shaft (71), and the other end is used for being hung on the sand box (A); The sand box locking mechanism (70) is arranged on the bracket (30), the sand box locking mechanism (70) comprises a locking shaft (71), the locking shaft (71) is rotatably arranged on a locking shaft seat (73), a ratchet wheel (72) is connected to the locking shaft (71), a ratchet pawl (74) arranged on the locking shaft seat (73) and the ratchet wheel (72) constitute a ratchet and pawl mechanism, one end of a locking rope (75) is connected to the locking shaft (71), and the other end is used for being hung on the sand box (A); The sand box locking mechanism (70) is arranged on the bracket (30), the sand box locking mechanism (70) comprises a locking shaft (71), the locking shaft (71) is rotatably arranged on a locking shaft seat (73), a ratchet wheel (72) is connected to the locking shaft (71), a ratchet pawl (74) arranged on the locking shaft seat (73) and the ratchet wheel (72) constitute a ratchet and pawl mechanism, one end of a locking rope (75) is connected to the locking shaft (71), and the other end is used for being hung on the sand box (A); The sand box locking mechanism (70) is arranged on the bracket (30), the sand box locking mechanism (70) comprises a locking shaft (71), the locking shaft (71) is rotatably arranged on a locking shaft seat (73), a ratchet wheel (72) is connected to the locking shaft (71), a ratchet pawl (74) arranged on the locking shaft seat (73) and the ratchet wheel (72) constitute a ratchet and pawl mechanism, one end of a locking rope (75) is connected to the locking shaft (71), and the other end is used for being hung on the sand box (A); The sand box locking mechanism (70) is arranged on the bracket (30), the sand box locking mechanism (70) comprises a locking shaft (71), the locking shaft (71) is rotatably arranged on a locking shaft seat (73), a ratchet wheel (72) is connected to the locking shaft (71), a ratchet pawl (74) arranged on the locking shaft seat (73) and the ratchet wheel (72) constitute a ratchet and pawl mechanism, one end of a locking rope (75) is connected to the locking shaft (71), and the other end is used for being hung on the sand box (A); 2. A flask tipping device according to claim 1, characterised in that: The sand box locking mechanism (70) is arranged on the bracket (30), the sand box locking mechanism (70) comprises a locking shaft (71), the locking shaft (71) is rotatably arranged on a locking shaft seat (73), a ratchet wheel (72) is connected to the locking shaft (71), a ratchet pawl (74) arranged on the locking shaft seat (73) and the ratchet wheel (72) constitute a ratchet and pawl mechanism, one end of a locking rope (75) is connected to the locking shaft (71), and the other end is used for being hung on the sand box (A); 3. A flask tipping device according to claim 2, characterised in that: The sand box locking mechanism (70) is arranged on the bracket (30), the sand box locking mechanism (70) comprises a locking shaft (71), the locking shaft (71) is rotatably arranged on a locking shaft seat (73), a ratchet wheel (72) is connected to the locking shaft (71), a ratchet pawl (74) arranged on the locking shaft seat (73) and the ratchet wheel (72) constitute a ratchet and pawl mechanism, one end of a locking rope (75) is connected to the locking shaft (71), and the other end is used for being hung on the sand box (A); 4. The sand box tipping device of claim 1, wherein: The sand box locking mechanism (70) is arranged on the bracket (30), the sand box locking mechanism (70) comprises a locking shaft (71), the locking shaft (71) is rotatably arranged on a locking shaft seat (73), a ratchet wheel (72) is connected to the locking shaft (71), a ratchet pawl (74) arranged on the locking shaft seat (73) and the ratchet wheel (72) constitute a ratchet and pawl mechanism, one end of a locking rope (75) is connected to the locking shaft (71), and the other end is used for being hung on the sand box (A); 5. The sand box tipping device of claim 1, wherein: ​ 6. The sand box tipping device of claim 4, wherein: ​ 7. The sand box tipping device of claim 1, wherein: ​ 8. The sand box tipping device of claim 1, wherein: The cabinet door (20) comprises two side plates (21), the upper edges of the side plates (21) are connected by a top plate (22), the side plates (21) and the top plate (22) form a downward opening groove, the lower edges of the side plates (21) are provided with rails (60) for the translation of the side plates (21), the guide direction of the rails (60) is horizontal and parallel to the two side walls of the cabinet (10), a door plate (23) for shielding the front end area of the downward opening groove formed by the side plates (21) and the top plate (22) is arranged at the front end of the downward opening groove or the front side of the cabinet (10).

9. A flask tipping device according to claim 8, characterised in that: The front edge of the top plate (22) is hingedly connected with the door plate (23), the cabinet door (20) formed by the door plate (23), the side plates (21) and the top plate (22) shields the opening area (11) of the cabinet (10) when moved to the front position or exposes the opening area (11) when moved to the rear position.

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