Precoated sand paving device for casting

Abstract

The utility model discloses a precoated sand paving device for casting, and belongs to the technical field of casting forming equipment. Comprising a sand feeding mechanism and a plate curtain type sand carrying mechanism used for receiving and bearing precoated sand fed by the sand feeding mechanism, the sand feeding mechanism is supported on a terrace of a casting place in a using state, the left end of the plate curtain type sand carrying mechanism extends to the sand feeding mechanism, and the right end of the plate curtain type sand carrying mechanism is also supported on the terrace of the casting place. The precoated sand laying machine has the advantages that the precoated sand can be fed to the plate curtain type sand carrying mechanism by the sand feeding mechanism, so that a layer of uniform precoated sand can be laid on the plate curtain type sand carrying mechanism, and the precoated sand can well protect a mold and a plate curtain which are arranged on the precoated sand, so that the uniformity and the mechanical property of the structure of a casting part are improved, and the quality of the casting part is improved. Ideal heat insulation and heat preservation effects are embodied, the stability of the position and posture of the mold is guaranteed, and conditions are provided for improving the casting efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of casting molding equipment, and particularly relates to a coated sand paving device for casting. Background Art

[0002] Coated sand, also known as shell sand, is a type of molding or core sand (such as quartz sand) with a solid resin coating on the surface. Coated sand offers suitable strength and good fluidity, enabling the production of complex sand cores with a dense structure and sharp contours.

[0003] The coating sand for casting described in this application refers to automatically laying a layer of coating sand of uniform thickness on the upper surface of the plate curtain that moves in a cycle, and the online workers place the molds for casting the molded products one by one on the surface of the coating sand on the plate curtain, and the steel ladle, iron ladle, teapot ladle or ductile iron ladle corresponding to the mold above the plate curtain pours molten steel or molten iron into the mold (called "casting" in the industry), and then forms a cycle of standing, demolding, demolding, discharging, sand collection and sand covering.

[0004] According to common knowledge, laying a layer of sand on a sheet curtain and placing the mold for the workpiece to be cast on the sand is not solely intended to prevent direct damage to the sheet curtain. Beyond this, it serves several other purposes: It protects the mold and sheet curtain, as the sand layer provides a buffering effect, reducing direct damage to the sheet curtain beneath the mold from the impact of the molten metal during the casting process. It also prevents molten metal from splashing during casting, contributing to the safety of the work environment and equipment. It also ensures casting quality, as the sand layer stabilizes the mold, preventing movement or deformation during the casting process, thereby ensuring the quality and dimensional accuracy of the casting. Furthermore, the sand layer controls the cooling rate of the molten metal, contributing to the uniformity of the casting's structure and improved mechanical properties. It also provides excellent thermal insulation, as the sand layer has excellent insulating properties and reduces heat loss from the molten metal during casting, resulting in a more uniform solidification process. This is particularly important for castings that require strict control of solidification conditions. It also provides support and fixation, as the sand layer provides the necessary support and fixation for the mold, ensuring that the mold maintains a stable position and posture during the casting process. This is particularly important for castings with relatively complex shapes or large volumes. It also facilitates cleaning and maintenance, as the sand layer can be relatively cleared after casting, facilitating subsequent maintenance and care of the sheet curtain and mold.

[0005] In the public Chinese patent literature, technical information related to the processing of coated sand can be found, such as CN208743610U recommends a "new type of coated sand production device" and CN2633467Y provides a "thermal regeneration device for coated sand for casting", etc. However, there is no relevant technical information for laying coated sand on a plate curtain and playing the aforementioned role. The technical solution to be introduced below was produced in this context. Utility Model Content

[0006] The task of the utility model is to provide a coated sand paving device for casting, which can evenly spread coated sand on the plate curtain to effectively protect the mold and the plate curtain, improve the uniformity and mechanical properties of the casting workpiece structure, embody ideal heat insulation and heat preservation, ensure the stability of the mold position and posture, and provide conditions for improving casting efficiency.

[0007] The task of the utility model is accomplished in this way. A sand-laying device for coated sand for casting includes a sand feeding mechanism and a plate curtain type sand carrying mechanism for receiving and carrying the coated sand fed by the sand feeding mechanism. The sand feeding mechanism is supported on the floor of the casting site when in use. The left end of the plate curtain type sand carrying mechanism extends to the sand feeding mechanism, and the right end is also supported on the floor of the casting site.

[0008] In a specific embodiment of the present invention, the sand feeding mechanism includes a sand feeding hopper support frame, a sand feeding hopper and a sand uniforming and guiding device. The sand feeding hopper support frame is supported on the floor of the casting site when in use. The sand feeding hopper is arranged on the top of the sand feeding hopper support frame through a sand feeding hopper fixing block. The upper part of the sand feeding hopper is configured to be open, and the lower part and the sand feeding hopper are configured along the length direction of the sand feeding hopper to have a sand feeding hopper sand outlet trough for leading out the coated sand in the sand feeding hopper cavity of the sand feeding hopper. The sand uniforming and guiding device is arranged on the upper right side of the length direction of the sand feeding hopper; the left end of the plate curtain type sand loading mechanism extends to the middle of the height direction of the sand feeding hopper support frame at a position corresponding to the bottom of the sand feeding hopper, and the coated sand from the sand feeding hopper sand outlet trough is received by the left end of the plate curtain type sand loading mechanism.

[0009] In another specific embodiment of the present invention, the sand outlet of the sand feeding hopper is composed of a lower portion of the left side wall of the sand feeding hopper in the longitudinal direction, which is inclined toward the right side wall of the sand feeding hopper and is formed with a space with a width of 0.5-1.5 cm between the lower portion of the right side wall of the sand feeding hopper in the longitudinal direction.

[0010] In another specific embodiment of the present invention, the sand uniforming and guiding device includes a driving plate cylinder, a cylinder slider driving plate, a sand guide rod reciprocating sliding block guide rail, a sand guide rod reciprocating sliding block, a sand guide rod and a sand driving and uniforming plate. The front end and the rear end of the driving plate cylinder are respectively supported and fixed on a driving plate cylinder seat, and the driving plate cylinder seat is fixed to the upper part of the right side wall of the sand feeding hopper facing away from the sand feeding hopper cavity, the cylinder slider driving plate is fixed to the driving plate cylinder slider of the driving plate cylinder, the sand guide rod reciprocating sliding block guide rail corresponds to the right side wall of the sand feeding hopper facing the upper part of the side of the sand feeding hopper cavity, and the rear end of the sand guide rod reciprocating sliding block guide rail is aligned with the sand feeding hopper The bottom of the sand driving and sand uniforming plate corresponds to the top of the sand feeding hopper sand outlet while maintaining a distance from the sand feeding hopper sand outlet.

[0011] In another specific embodiment of the present invention, the driving plate acting cylinder is a rodless cylinder; the cross-sectional shape of the reciprocating slider guide rail of the sand guide rod is dovetail-shaped, and the cross-sectional shape of the slider groove is also dovetail-shaped; the rodless cylinder is a rodless cylinder that works in forward and reverse directions.

[0012] In another specific embodiment of the present invention, the plate curtain type sand carrying mechanism includes a left crossbeam support frame, a right crossbeam support frame, a front crossbeam, a rear crossbeam, a plate curtain transmission active sprocket, a plate curtain transmission driven sprocket, a plate curtain and a plate curtain transmission drive device. The left crossbeam support frame is supported on the floor at a position corresponding to the bottom of the sand feeding hopper, the right crossbeam support frame corresponds to the right side of the left crossbeam support frame and is also supported on the floor, the front crossbeam and the rear crossbeam remain parallel to each other in the length direction, and the left ends of the front and rear crossbeams are supported and fixed on the top of the left support frame, while the right ends of the front and rear crossbeams are supported and fixed on the top of the right crossbeam support frame, the spacing between the opposite sides of the front and rear crossbeams is adapted to the width of the plate curtain, and the number of plate curtain transmission active sprockets is respectively fixed on the front end of the plate curtain transmission active sprocket shaft. The front and rear ends of the plate curtain drive driving sprocket shaft are respectively supported on the right ends of the front and rear cross beams by bearing seats, and the front end of the plate curtain drive driving sprocket shaft also extends to the front side of the front cross beam. The number of plate curtain drive driven sprockets is a pair of plate curtain drive driven sprocket shafts fixed respectively on the front and rear ends and located between the opposite sides of the front and rear cross beams. The front and rear ends of the plate curtain drive driven sprocket shaft are respectively supported on the left ends of the front and rear cross beams by bearing seats, the plate curtain is located between the front and rear cross beams, and the right end of the plate curtain is sleeved on a pair of plate curtain drive driving sprockets, and the left end is sleeved on a pair of plate curtain drive driven sprockets. The plate curtain transmission drive device is arranged on the right support frame of the cross beam and is transmission-connected to the plate curtain drive driving sprocket shaft.

[0013] In a more specific embodiment of the present invention, the panel curtain is composed of a plurality of curtain pieces, a front chain link, a rear chain link and a chain link hinge shaft, and a pair of curtain piece hinge ears 1 and a pair of curtain piece hinge ears 2 are respectively fixed on the side of the curtain piece facing the panel curtain cavity, the pair of curtain piece hinge ears 1 are fixed on one side of the curtain piece, and a hinge ear hole 1 corresponding to each other is opened on the pair of curtain piece hinge ears 1, the pair of curtain piece hinge ears 2 are fixed on the other side of the curtain piece in a state corresponding to the pair of curtain piece hinge ears 1, and the pair of curtain piece hinge ears 1 are fixed on the other side of the curtain piece in a state corresponding to the pair of curtain piece hinge ears 1, and the hinge ear holes 1 corresponding to each other are opened on the pair of curtain piece hinge ears 1. The two curtain pieces are each provided with two hinged ear holes corresponding to each other in position. The pair of curtain piece hinged ears two and the pair of curtain piece hinged ears one on each two adjacent curtain pieces are hingedly connected by the chain link hinge shaft. Each curtain piece corresponds to a front chain link and a rear chain link of the chain, and the front chain link corresponds to the front end of the curtain piece, and the rear chain link corresponds to the rear end of the curtain piece. A curtain piece sealing overlapped step edge is formed on one side of the length direction of the curtain piece for preventing the coated sand from leaking from the gap between adjacent curtain pieces. The curtain piece sealing overlapped step edge is connected to the curtain piece sealing overlapped step edge. The upper surfaces of the edge parts of one side in the length direction of adjacent curtain sheets overlap, the chain link hinge shaft passes through the chain front link chain piece holes on a pair of chain front link chain pieces constituting the chain front link, the hinge ear hole 1, the hinge ear hole 2 and the chain rear link chain piece holes on a pair of chain rear link chain pieces constituting the chain rear link, and the chain link hinge shaft front limiting piece is arranged at the front end of the chain link hinge shaft at a position corresponding to the front side of the chain front link to prevent the chain link hinge shaft from moving, and the chain link hinge shaft rear limiting piece is arranged at the front end of the chain link hinge shaft corresponding to the rear side of the chain The rear side of the section is arranged at the rear end of the link hinge shaft to limit the anti-movement of the link hinge shaft. The link hinge shaft hinges the front chain link, a pair of chain hinge ears one, a pair of chain hinge ears two and the rear chain link corresponding to each curtain piece to form an endless ring structure for the curtain. The right ends of the front chain and the rear chain, which are formed by the front chain link and the rear chain link of the chain hinged by the link hinge shaft, are respectively placed on a pair of curtain transmission driving sprockets, and the left ends are respectively placed on a pair of curtain transmission driven sprockets.

[0014] In another specific embodiment of the present invention, the panel curtain transmission drive device includes a panel curtain drive motor, a panel curtain drive reduction gearbox, a panel curtain drive driving wheel, a panel curtain drive driven wheel and a panel curtain drive transmission belt. The panel curtain drive motor is electrically connected to the electrical control box when in use. The panel curtain drive motor cooperates with the panel curtain drive reduction gearbox for transmission and is supported on the panel curtain drive reduction gearbox support seat together with the panel curtain drive motor. The panel curtain drive reduction gearbox support seat is fixed on the support seat fixing plate, and the support seat fixing plate is fixed on the right support frame of the crossbeam, wherein the panel curtain drive reduction gearbox output shaft of the panel curtain drive reduction gearbox faces forward, the panel curtain drive driving wheel is fixed on the panel curtain drive reduction gearbox output shaft, and the panel curtain drive driven wheel is fixed on the front end of the panel curtain drive driving sprocket shaft, one end of the panel curtain drive transmission belt is sleeved on the panel curtain drive driving wheel, and the other end is sleeved on the panel curtain drive driven wheel.

[0015] In yet another specific embodiment of the present invention, the panel curtain driving active wheel and the panel curtain driving driven wheel are sprockets or pulleys, and the panel curtain driving transmission belt is a chain or a belt.

[0016] In yet another specific embodiment of the present invention, a mold signal collector is provided at the upper left end of the front crossbeam or the rear crossbeam for collecting signals of the mold to be cast placed on the coated sand on the surface of the plate curtain. The mold signal collector is a photoelectric switch, which is electrically connected to the electrical control box when in use.

[0017] The technical effect of the technical solution provided by the utility model is that: since the coated sand can be fed to the plate curtain type sand carrying mechanism by the sand feeding mechanism, a uniform layer of coated sand can be laid on the plate curtain type sand carrying mechanism, and the coated sand plays a good protective role for the mold and the plate curtain placed thereon, which helps to improve the uniformity and mechanical properties of the casting structure, embodies the ideal thermal insulation effect, ensures the stability of the mold position and posture, and provides conditions for improving the casting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of an embodiment of the present utility model.

[0019] Figure 2 for Figure 1 The detailed structural diagram of the sand uniforming and sand guiding device shown.

[0020] Figure 2a for Figure 1 The assembly structure diagram of the panel curtain is shown.

[0021] Figure 3 This is a schematic diagram of an application example of the present utility model.

[0022] Figure 4For configuration in Figure 1 The curtain type sand loading mechanism shown is Figure 3 The schematic diagram of the vibrating mold and sand connecting mechanism and the casting output mechanism between the coated sand recycling mechanism is shown.

[0023] Figure 5 for Figure 3 and Figure 4 Schematic diagram of the coated sand recycling mechanism shown. DETAILED DESCRIPTION

[0024] In order to enable a clearer understanding of the technical essence and beneficial effects of the present invention, the applicant provides a detailed description in the form of embodiments below. However, the description of the embodiments does not limit the technical solution of the present invention. Any equivalent changes made based on the concept of the present invention that are merely formal and not substantial should be regarded as the scope of the technical connotation disclosed by the present invention.

[0025] In the following description, all concepts related to directionality or orientation, such as up, down, left, right, front and back, are based on the current Figure 1 The position state is used as a reference, and therefore it cannot be understood as a special limitation on the technical solution provided by the present utility model.

[0026] See Figure 1 , shows a sand feeding mechanism 1 and a plate curtain type sand carrying mechanism 2 for receiving and carrying the coated sand fed by the sand feeding mechanism 1. The sand feeding mechanism 1 is supported on the floor of the casting site when in use. The left end of the plate curtain type sand carrying mechanism 2 extends to the sand feeding mechanism 1, and the right end is also supported on the floor of the casting site.

[0027] The aforementioned sand feeding mechanism 1 includes a sand feeding hopper support frame 11, a sand feeding hopper 12 and a uniform sand guiding device 13. The sand feeding hopper support frame 11 is a hollow frame structure, more vividly speaking, it is in the shape of a well frame. The sand feeding hopper support frame 11 is supported on the floor of the casting site when in use. The sand feeding hopper 12 is arranged on the top of the sand feeding hopper support frame 11 through the sand feeding hopper fixing blocks 123 located at (fixed to) the four corners of the sand feeding hopper 1. The upper part of the sand feeding hopper 12 is open, and the lower part is not And along the length direction of the sand feeding hopper 12, there is a sand feeding hopper sand outlet trough 122 for leading out the coated sand in the sand feeding hopper cavity 121 of the sand feeding hopper 12, and the sand uniforming and guiding device 13 is arranged on the upper right side of the length direction of the sand feeding hopper 12; the left end of the aforementioned plate curtain type sand loading mechanism 2 extends to the middle of the height direction of the aforementioned sand feeding hopper support frame 11 at a position corresponding to the bottom of the aforementioned sand feeding hopper 12, and the coated sand from the sand feeding hopper sand outlet trough 122 is received (obtained) by the left end of the aforementioned plate curtain type sand loading mechanism 2.

[0028] The sand hopper outlet slot 122 is formed by a 0.5-1.5 cm wide space formed between the lower longitudinal portion of the left side wall of the sand hopper 12 and the lower longitudinal portion of the right side wall. The 0.5-1.5 cm space is a preferred width, preferably 0.6-1.3 cm, more preferably 0.9-1.1 cm, and most preferably 1 cm. In this embodiment, 1 cm is selected.

[0029] Please see the key Figure 2 And combined Figure 1 The above-mentioned sand uniforming and guiding device 13 includes a driving plate cylinder 131, a cylinder slider driving plate 132, a sand guide rod reciprocating sliding block guide rail 133, a sand guide rod reciprocating sliding block 134, a sand guide rod 135 and a sand driving and uniforming plate 136. The driving plate cylinder 131 is electrically controlled and connected to the electrical control box when in use. The front and rear ends of the driving plate cylinder 131 are respectively supported and fixed on a driving plate cylinder seat 1312, and the driving plate cylinder seat 1312 is fixed to the upper part of the right side wall of the sand feeding hopper 12 facing away from the above-mentioned sand feeding hopper cavity 121, the cylinder slider driving plate 132 is fixed to the driving plate cylinder slider 1311 of the driving plate cylinder 131, the sand guide rod reciprocating sliding block guide rail 133 corresponds to the upper part of the right side wall of the sand feeding hopper 12 facing the above-mentioned sand feeding hopper cavity 121, and the sand guide rod reciprocating sliding block guide rail 133 The rear end of the sand guide rod 135 is fixed to the upper edge of the rear side wall of the sand feeding hopper 12, and the front end is fixed to the upper edge of the front side wall of the sand feeding hopper 12. The sand guide rod reciprocating sliding block 134 slides with the sand guide rod reciprocating sliding block guide rail 133 through its sliding block groove 1341. The upper end of the sand guide rod 135 is formed with a sliding block fixing plate 1351 bent in the direction of the sand guide rod reciprocating sliding block 134. The sliding block fixing plate 1351 is fixed to the upper side of the sand guide rod reciprocating sliding block 134. The lower end of the sand guide rod 135 extends downward in a longitudinal cantilever state to the position of the sand feeding hopper sand outlet slot 122. The sand driving and sand uniforming plate 136 is fixed to the left side of the sand guide rod 135 in a longitudinal state, and forms a perpendicular relationship with the left side of the sand guide rod 135. The bottom of the sand driving and sand uniforming plate 136 corresponds to the upper part of the sand feeding hopper sand outlet slot 122 when a distance is maintained between it and the sand feeding hopper sand outlet slot 122.

[0030] In this embodiment, the aforementioned driving plate cylinder 131 is a rodless cylinder; the cross-sectional shape of the aforementioned sand guide rod reciprocating slider guide rail 133 is dovetail-shaped, and accordingly, the cross-sectional shape of the aforementioned slider groove 1341 is also dovetail-shaped.

[0031] In this embodiment, the aforementioned rodless cylinder is a rodless cylinder that works in forward and reverse directions.

[0032] See you next time Figure 1 and Figure 2 And combined Figure 3 ,Depend on Figure 3 The negative pressure vacuum loader 3 shown introduces the recycled coated sand into the sand feeding hopper cavity 121 of the sand feeding hopper 12 through a hose 31 connected to the discharge port of the negative pressure vacuum loader 3, and the sand feeding hopper sand outlet 122 is introduced into the corresponding plate curtain type sand carrying mechanism 2 below which will be described in detail below. The sand guide rod 135 is driven by the sand guide rod 136 to move the slider 134 and the sand guide rod 135 back and forth, and the sand guide rod 135 is used to move the slider 134 and the sand guide rod 135 to move the slider 134 back and forth.

[0033] Please see the key Figure 1The above-mentioned plate curtain type sand loading mechanism 2 includes a left crossbeam support frame 21, a right crossbeam support frame 22, a front crossbeam 23, a rear crossbeam 24, a plate curtain transmission active sprocket 25, a plate curtain transmission driven sprocket 26, a plate curtain 27 and a plate curtain transmission drive device 28. The left crossbeam support frame 21 is supported on the ground at a position corresponding to the bottom of the above-mentioned sand feeding hopper 12. The right crossbeam support frame 22 corresponds to the right side of the left crossbeam support frame 21 and is also supported on the ground. The front crossbeam 23 and the rear crossbeam 24 are mutually supported. In the longitudinal direction, the front and rear are kept parallel, and the left ends of the front crossbeam 23 and the rear crossbeam 24 are supported and fixed on the top of the aforementioned left support frame 21, while the right ends of the front crossbeam 23 and the rear crossbeam 24 are supported and fixed on the top of the aforementioned right crossbeam support frame 22. The spacing between the opposite sides of the front crossbeam 23 and the rear crossbeam 24 is adapted to the width of the panel 27. The number of the panel transmission driving sprockets 25 is respectively fixed at the front and rear ends of the panel transmission driving sprocket shaft 251 and is located on the front crossbeam. 23 and a pair of opposite sides of the rear crossbeam 24, the front and rear ends of the plate curtain transmission active sprocket shaft 251 are respectively supported by the right ends of the front crossbeam 23 and the rear crossbeam 24 for rotation through the bearing seats, and the front end of the plate curtain transmission active sprocket shaft 251 also extends to the front side of the front crossbeam 23, the number of the plate curtain transmission driven sprocket 26 is respectively fixed at the front and rear ends of the plate curtain transmission driven sprocket shaft 261 and is located between the front crossbeam 23 and the rear crossbeam 24 on the opposite side, the The front and rear ends of the panel curtain drive driven sprocket shaft 261 are rotatably supported on the left ends of the front crossbeam 23 and the rear crossbeam 24 through bearing seats respectively. The panel curtain 27 is located between the aforementioned front crossbeam 23 and the rear crossbeam 24, and the right end of the panel curtain 27 is sleeved on a pair of panel curtain drive active sprockets 25, and the left end is sleeved on a pair of panel curtain drive driven sprockets 26. The panel curtain drive drive device 28 is arranged on the aforementioned crossbeam right support frame 22 and is transmission-connected to the aforementioned panel curtain drive active sprocket shaft 251.

[0034] See Figure 2a And combined Figure 1 The above-mentioned curtain 27 is composed of a plurality of curtain pieces 271, a chain front link 272, a chain rear link 273 and a chain link hinge shaft 274. The curtain piece 271 is located on the side of the curtain cavity of the curtain 27. Figure 2aIn the position shown, a pair of curtain piece hinged ears 2711 and a pair of curtain piece hinged ears 2712 are fixed to the side facing upward. The pair of curtain piece hinged ears 2711 are fixed to one side of the curtain piece 271, and each of the pair of curtain piece hinged ears 2711 has a hinged ear hole 27111 corresponding to each other at a position. The pair of curtain piece hinged ears 2712 are fixed to the other side of the curtain piece 271 in a state corresponding to the pair of curtain piece hinged ears 2711, and each of the pair of curtain piece hinged ears 2712 has a hinged ear hole 27121 corresponding to each other at a position. The above-mentioned pair of curtain pieces on each of the two adjacent curtain pieces 271 The hinged ear 2712 and the pair of curtain piece hinged ears 2711 are hingedly connected by the aforementioned chain link hinge shaft 274. Each of the aforementioned curtain pieces 271 corresponds to a chain front link 272 and a chain rear link 273, and the chain front link 272 corresponds to the front end of the aforementioned curtain piece 271, while the chain rear link 273 corresponds to the rear end of the curtain piece 271. A curtain piece sealing overlapped step edge 2713 is formed on one side of the length direction of the curtain piece 271 to prevent the coated sand from leaking from the gap between adjacent curtain pieces 271. The curtain piece sealing overlapped step edge 2713 is connected to one side edge of the length direction of the adjacent curtain piece 271. The upper surfaces of the parts coincide with each other, the chain link hinge shaft 274 passes through the chain front link chain plate holes on a pair of chain front link chain plates constituting the chain front link 272, the aforementioned hinge ear hole 1 27111, the hinge ear hole 27121 and the chain rear link chain plate holes on a pair of chain rear link chain plates constituting the chain rear link 273, and the chain link hinge shaft front limiting piece is set at the front end of the chain link hinge shaft 274 at a position corresponding to the front side of the aforementioned chain front link 272 to prevent the chain link hinge shaft 274 from moving, and the chain link hinge shaft rear limiting piece is set at the chain link at a position corresponding to the rear side of the aforementioned chain rear link 273. The rear end of the hinge shaft 274 is used to prevent the chain link hinge shaft 274 from moving. The aforementioned chain link hinge shaft 274 hinges the front chain link 272, a pair of chain hinge ears 1 2711, a pair of chain hinge ears 2 2712 and the rear chain link 273 corresponding to each curtain piece 271 to form an endless ring structure. The right ends of the front chain and the rear chain formed by the hinge of the front chain link 272 and the rear chain link 273 through the aforementioned chain link hinge shaft 274 are respectively placed on a pair of curtain transmission active sprockets 25, and the left ends are respectively placed on a pair of curtain transmission driven sprockets 26.

[0035] The above-mentioned typical example of the front and rear limiting parts of the chain link articulated shaft 274 that limit the front and rear ends to prevent the chain link articulated shaft 274 from moving or even escaping is a retaining spring, which is clamped in the retaining spring groove formed at the front and rear ends of the chain link articulated shaft 274.

[0036] As a preferred solution, in order to prevent the curtain 27 from forming a concave arc in the middle of its length due to the weight of the coated sand, which would cause the upper surface of the entire curtain 27 and the coated sand layer laid thereon to be inconsistent in level, curtain support strips, curtain support rollers or similar components can be rotatably arranged in a spaced manner between the front crossbeam 23 and the rear crossbeam 24 and at a position corresponding to the curtain cavity of the curtain 27. This embodiment chooses the former, that is, the curtain is supported by curtain support strips, so that Figure 1 There are four sets of curtain slat support beam fixing screws for fixing curtain slats. Each set of four curtain slat support beam fixing screws has a pair (i.e., two). For details, see Figure 1 The front side of the front crossbeam 23 shows the screws for fixing the curtain slat support beam. More specifically, curtain slat support beams for fixing the curtain slats are fixed at intervals between the opposite sides of the front crossbeam 23 and the rear crossbeam 24. The spaced curtain slat support beams, together with the front crossbeam 23 and the rear crossbeam 24, form a ladder-like shape consisting of a pair of vertical columns and spaced rungs (i.e., "stepping rods") located between the pair of vertical columns. The aforementioned curtain slats (not shown) are fixed to the middle portion of the upward side of the aforementioned curtain slat support beam in a state parallel to the longitudinal direction of the front crossbeam 23 and the rear crossbeam 24. The curtain slats can be either a single wide one or a pair of relatively narrow ones spaced apart. In short, the number of curtain slats is not limited to the above description. When the curtain 27 moves carrying the coated sand, the mold, and the casting inside the mold, it can be supported by the curtain slats and will not sag or fall.

[0037] The aforementioned panel curtain transmission drive device 28 includes a panel curtain drive motor 281, a panel curtain drive reduction box 282, a panel curtain drive driving wheel 283, a panel curtain drive driven wheel 284 and a panel curtain drive transmission belt 285. The panel curtain drive motor 281 is electrically connected to the electrical control box when in use. The panel curtain drive motor 281 is matched with the panel curtain drive reduction box 282 for transmission and is supported by the panel curtain drive reduction box 282 together with the panel curtain drive motor 281 on the panel curtain drive reduction box support seat 2821, and the panel curtain drive reduction box support seat 2821 is fixed. It is fixed on the support seat fixing plate 28211, which is fixed on the aforementioned crossbeam right support frame 22, wherein the panel curtain drive reducer output shaft 2822 of the panel curtain drive reducer 282 faces forward, the panel curtain drive driving wheel 283 is fixed on the panel curtain drive reducer output shaft 2822, and the panel curtain drive driven wheel 284 is fixed on the aforementioned panel curtain drive driving sprocket shaft 251, one end of the panel curtain drive belt 285 is sleeved on the panel curtain drive driving wheel 283, and the other end is sleeved on the panel curtain drive driven wheel 284.

[0038] In this embodiment, the aforementioned panel-driving driving pulley 283 and panel-driving driven pulley 284 are sprockets, and accordingly, the panel-driving transmission belt 285 is a chain. The applicant would like to clarify that if only formal, but not substantial, changes are made, such as using pulleys to replace the panel-driving driving and driven pulleys, or using a transmission belt to replace the chain, these should be considered equivalent technical means and still fall within the technical scope of the present invention.

[0039] Preferably, a mold signal collector 29 is installed at the upper left end of the rear crossbeam 24 to collect signals from the mold to be cast, which is placed on the coated sand on the surface of the plate curtain 27. This mold signal collector 29 is a photoelectric switch, which is electrically connected to the electrical control box when in use. If the mold signal collector 29 is installed at the upper left end of the front crossbeam 23, it should be considered an equivalent variation.

[0040] Under the operation of the aforementioned panel curtain drive motor 281, the panel curtain drive motor 281 drives the panel curtain drive reduction box 282, and the panel curtain drive reduction box output shaft 2822 of the panel curtain drive reduction box 282 drives the panel curtain drive active pulley 283, which drives the panel curtain drive driven pulley 284 through the panel curtain drive transmission belt 285, and the panel curtain drive driven pulley 284 drives the panel curtain drive active sprocket 25, so that the aforementioned front chain and rear chain, which are respectively formed by the front chain link 272 and the rear chain link 273 of the chain through circular connection (through the chain link hinge shaft), one end of which is sleeved on a pair of panel curtain drive active sprockets 25 and the other end of which is sleeved on a pair of panel curtain drive driven sprockets 26, move. The synchronous movement of the front chain and the rear chain causes the panel curtain 27 to form a transmission plane that moves (i.e., "moves") over and over again.

[0041] See Figure 3 Since the coating sand formed by the sand feeding hopper 12 of the sand feeding mechanism 1 is fed from the upper part of the plate curtain 27, the sand layer 10 (depending on the mold for casting different products) is required by the process, the online operator can cast the casting to be cast, such as the blade of the cyclone structure used in the dust removal equipment of the steel industry, etc. ( Figure 3 When the position of the mold 20 on the sand layer 10 corresponds to the mold signal collector 29, the mold signal collector 29 feeds back the signal to the electrical control box, which sends a signal to the curtain drive motor 281 to stop working. At this time, the plate curtain drive motor 281 corresponding to the upper part of the mold 20 and suspended by the plate curtain drive motor 281 is turned off. Figure 3Molten steel (hot metal) from the illustrated ladle 30 is poured into the mold 20. Since the timer (delay time) for the curtain drive motor 281 to stop operating is set rhythmically according to process requirements and depends on the size of the casting, once the casting is complete, i.e., once the delay time has expired, the curtain drive motor 281 starts operating again. Once the mold 20, placed on the sand bed 10 by the worker, reaches a point where the mold signal collector 29 can detect a signal, the above process repeats, with the ladle 30 pouring molten steel into the mold.

[0042] In the above process, the plate curtain 27 carries the sand layer 10 together with the mold 20 that has completed the casting (the mold 20 has the completed casting) and turns from the right end of the plate curtain 27 at the position of the plate curtain drive sprocket 25. The sand layer 10 on the plate curtain 27 and the mold 20 with the casting automatically fall to the Figure 3 The vibrating mold-joining and sand-receiving mechanism 4 shown in FIG. The coated sand that falls onto the vibrating mold-joining and sand-receiving mechanism 4 leaks down and is automatically supplied to the coated sand recycling mechanism 6 located to the right of the vibrating mold-joining and sand-receiving mechanism 4. The sand is then supplied to the aforementioned negative pressure vacuum loader 3 via a sand storage bin 7 located above and to the right of the coated sand recycling mechanism 6 through a sand return line 71. The aforementioned mold 20 that falls onto the vibrating mold-joining and sand-receiving mechanism 4 automatically arrives at the casting delivery mechanism 5 located between the vibrating mold-joining and sand-receiving mechanism 4 and the coated sand recycling mechanism 6. The casting delivery mechanism 5 delivers the molded product and releases it, and the mold 20 is then recycled. Since the structure and operating principle of the negative pressure vacuum loader 3 are well-known technologies widely available in the market, for example, the YE3 powder and granular material negative pressure conveying system manufactured by Jianyi Intelligent Equipment Co., Ltd. in Xinxiang City, Henan Province, China, which was sold on the market prior to the filing of this application, can preferably be used, but not limited to, and therefore the applicant will not describe it in detail.

[0043] See Figure 4The above-mentioned coated sand recycling mechanism 6 includes a lifting bucket cage 61, a lifting bucket drive motor 62, a lifting bucket drive motor sprocket 63, a lifting bucket drive transmission chain 64, a lifting bucket belt roller drive sprocket 65, a lifting bucket belt roller 66, a lifting bucket belt 67, a lifting bucket belt transition roller 68 and a coated sand transfer device 69. The upper end of the lifting bucket cage 61 extends above the upper floor 40, and a coated sand output cover 611 is provided on the top of the lifting bucket cage 61. The coated sand output cover 611 has a coated sand output port 6111, and the coated sand output port 6111 corresponds to the upper left end of the coated sand transfer device 69. The lower end support of the cage 61 is constructed in the pit 50 on the ground. The bucket driving motor 62 electrically connected to the electrical control box is fixed to the upper left side of the bucket cage 61 through the bucket driving motor seat 621. The bucket driving motor sprocket 63 is fixed to the front end of the bucket driving motor shaft 622 of the bucket driving motor 62. The bucket belt roller 66 is arranged at the upper end of the bucket cage cavity of the bucket cage 61. The bucket belt roller front shaft head 661 and the bucket belt roller rear shaft head of the bucket belt roller 66 are rotatably supported on the front side wall of the bucket cage and the rear side wall of the bucket cage respectively, and the bucket belt roller front shaft head 661 extends to the lifting cage. In front of the front side wall of the bucket cage, the bucket belt roller shaft driving sprocket 65 is fixed on the bucket belt roller front shaft head 661 at a position corresponding to the right side of the bucket driving motor sprocket 63. One end of the bucket driving transmission chain 64 is sleeved on the bucket driving motor sprocket 63, and the other end is sleeved on the bucket belt roller shaft driving sprocket 65. The bucket belt transition roller 68 is arranged at the lower end of the bucket cage cavity of the bucket cage 61. The bucket belt transition roller front shaft head 681 and the bucket belt transition roller rear shaft head of the bucket belt transition roller 68 are rotatably supported on the bucket cage front side wall and the bucket cage rear side wall of the bucket cage 61 respectively. The upper end of the bucket belt 67 is sleeved on the lifting bucket belt roller 66, and the lower end is sleeved on the lifting bucket belt transition roller 68. On the lifting bucket belt 67 and on the outside of the lifting bucket belt 67, coated sand taking buckets 671 are arranged in parallel with each other in a spaced state. The coated sand transfer device 69 is arranged on the aforementioned floor 40 at a position corresponding to the position between the aforementioned coated sand outlet 6111 and the sand storage bin 7 and is communicated with the sand storage bin 7. Among them, a lifting bucket cage coated sand inlet 612 is provided on the left side of the lower end of the aforementioned lifting bucket cage 61, which protrudes from the left side wall of the lifting bucket cage 61; a sand storage bin dust cover 72 is provided above the sand storage bin 7;The right end of the aforementioned vibrating mold and sand receiving mechanism 4 corresponds to the aforementioned lifting bucket cage coated sand inlet 612, and a coated sand outlet dust removal cover 60 is provided between the aforementioned coated sand outlet 6111 and the left end of the aforementioned coated sand transfer device 69. The coated sand from the coated sand outlet 6111 passes through the coated sand outlet dust removal cover 60 and then falls to the aforementioned coated sand transfer device 69 and is sent into the aforementioned sand storage bin 7 by the coated sand transfer device 69. As a preferred solution, bucket belt tensioning rollers 613 for tensioning the bucket belt 67 can be rotatably disposed at intervals along the height direction of the bucket cage cavity of the bucket cage 61. The belt tensioning roller shafts 6131 of the belt tensioning rollers 613 are spaced apart in an S-shaped staggered arrangement, and the front and rear ends of the belt tensioning roller shafts 6131 of the belt tensioning rollers 613 are rotatably supported on bucket tensioning roller shaft support seats 61311 provided on the front and rear outer walls of the bucket cage 61, respectively.

[0044] See Figure 5 And combined Figure 3 ,exist Figure 5The vibrating mold-sand receiving mechanism 4 and the casting output mechanism 5 are shown in the figure, which are located at the right end of the plate curtain 27 of the structural system of the plate curtain type sand loading mechanism 2 mentioned above. The vibrating mold-sand receiving mechanism 4 corresponds to the top of the pit 50. The vibrating mold-sand receiving mechanism 4 includes a coated sand hollow grid frame 41, a vibration box 42, a spring 43 and a vibrator 44. The front and rear sides of the coated sand hollow grid frame 41 are supported on the spring 43 through a spring support seat 411. At the upper end, the left end of the coated sand hollow grid frame 41 is connected to the right end of the aforementioned front crossbeam 23 and the rear crossbeam 24 and maintains a height difference lower than the right end of the plate curtain 27. The right end of the coated sand hollow grid frame 41 is connected to the left side of the front end of the aforementioned casting output mechanism 5. The vibration box 42 is located below the coated sand hollow grid frame 41. The left end of the vibration box 42 is fixed to the right side of the aforementioned crossbeam right support frame 22, and the right end is fixed to the lower end of the aforementioned lifting bucket cage 61. The left end is connected, and at the right end of the vibration box 42 and at a position above the coated sand inlet 612 of the aforementioned lifting bucket cage, there is a vibration box coated sand outlet 422 for leading out the coated sand that leaks (flows) from the coated sand hollow grid frame 41 and enters the vibration box cavity 421 of the vibration box 42. The number of springs 43 is distributed in a group corresponding to the front and rear sides of the vibration box 42, and each group has at least one pair. The lower end of the spring 43 is positioned on the spring fixed support seat 431, the spring fixed support seat 431 corresponding to the front side of the vibration box 42 is fixed on the front side wall of the vibration box 42 (i.e., the "front box wall"), and the spring fixed support seat 431 corresponding to the rear side of the vibration box 42 is fixed on the rear side wall of the vibration box 42 (i.e., the "rear box wall"), the upper end of the spring 43 is fixed to the aforementioned spring support seat 411, and the vibrator 44 electrically controlled by the electrical control box is arranged on the front side wall or the rear side wall of the vibration box 42. Wherein, a coated sand hollow grille dust collection cover 70 is provided above the coated sand hollow grille frame 41 .

[0045] Depend on Figure 3The mold 20 shown in the figure that has completed casting and the casting automatically fall from the right end of the plate curtain 27 onto the hollow grid frame 41 of coated sand. Under the vibration of the vibrator 44, the hollow grid frame 41 of coated sand vibrates the coated sand off the mold 20 and its casting and flows downward into the vibration box cavity 421, and is introduced into the coated sand inlet 612 of the lifting bucket cage through the coated sand outlet 422 of the vibration box. Under the operation of the bucket drive motor 62 of the coated sand recycling mechanism 6, the bucket drive motor shaft 622 drives the bucket drive motor sprocket 63, which drives the bucket belt roller shaft drive sprocket 65 through the bucket drive transmission chain 64, and the bucket belt roller shaft drive sprocket 65 drives the bucket belt roller shaft 651, and the bucket belt roller shaft 651 drives the bucket belt roller 66, and the bucket belt roller 66 drives the bucket belt 67. In the process of the bucket belt 67 moving around the bucket belt roller 66 and the bucket belt transition roller 68, the coated sand extracting bucket 671 (i.e., "coated sand extraction bucket") extracts the coated sand introduced from the coated sand inlet 612 of the bucket cage and transports it to the coated sand transfer device 69 through the coated sand output port 6111 of the coated sand output cover 611 (also called "coated sand output box") and the aforementioned coated sand output port dust removal cover 60. The coated sand is then transported by the transfer conveyor belt of the coated sand transfer device 69 to the coated sand conveyor belt. Figure 3 The sand storage bin 7 shown is then transported to the aforementioned negative pressure vacuum loader 3 through the sand return pipeline 71, and then supplied to the sand feeding hopper 12 of the sand feeding mechanism 1 by the aforementioned hose 31, and fed to the plate curtain 27 of the plate curtain type sand loading mechanism 2 by the sand feeding hopper sand outlet 122, so that the coated sand is recycled.

[0046] See you next time Figure 5 And combined Figure 3 In the above process, after the coated sand is shaken off the coated sand hollow grid frame 41, the mold together with the casting automatically falls from the right end of the coated sand hollow grid frame 41 to the casting output mechanism 5 (because the coated sand hollow grid frame 41 is slightly inclined toward the casting output mechanism 5). Figure 5 As shown, the casting output mechanism 5 and the right end of the coated sand hollow grid frame 41 maintain a height difference lower than the coated sand hollow grid frame 41. Figure 5 As shown, the front end of the casting delivery mechanism 5 is supported by a front bracket between the right end of the coated sand hollow grid frame 41 and the left side of the lifting bucket cage 61, while the rear end is supported on the ground by a rear bracket. Since the structure and working principle of the casting delivery mechanism 5 are basically the same as those of the aforementioned plate curtain type sand loading mechanism 2, the applicant will not elaborate on them. According to professional common sense, the mold delivered by the casting delivery mechanism 5 is reused after the casting is removed, and the casting is sent to the subsequent processing step. In addition, Figure 3 Also shown is a dust extraction hood 80 corresponding to the upper side of the casting discharging mechanism 5 .

[0047] In summary, the technical solution provided by the present utility model makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A device for laying coated sand for casting, characterized by: The invention comprises a sand feeding mechanism (1) and a plate curtain type sand carrying mechanism (2) for receiving and carrying the coated sand fed by the sand feeding mechanism (1). The sand feeding mechanism (1) is supported on the floor of the casting site when in use. The left end of the plate curtain type sand carrying mechanism (2) extends to the sand feeding mechanism (1), while the right end is also supported on the floor of the casting site.

2. The device for laying coated sand for casting according to claim 1, characterized in that: The sand feeding mechanism (1) comprises a sand feeding hopper support frame (11), a sand feeding hopper (12) and a uniform sand guiding device (13). The sand feeding hopper support frame (11) is supported on the floor of the casting site in a use state. The sand feeding hopper (12) is arranged on the top of the sand feeding hopper support frame (11) through a sand feeding hopper fixing block (123). The upper part of the sand feeding hopper (12) is configured to be open, and the lower part and along the length direction of the sand feeding hopper (12) are configured to have a sand feeding hopper (12) for feeding the sand ) is drawn out of the sand feeding hopper cavity (121) of the sand feeding hopper through a sand feeding hopper outlet slot (122), and a sand uniforming and guiding device (13) is arranged on the upper right side of the sand feeding hopper (12) in the longitudinal direction; the left end of the plate curtain type sand loading mechanism (2) extends to the middle of the sand feeding hopper support frame (11) in the height direction at a position corresponding to the lower side of the sand feeding hopper (12), and the coated sand coming out of the sand feeding hopper sand outlet slot (122) is received by the left end of the plate curtain type sand loading mechanism (2).

3. The device for laying coated sand for casting according to claim 2, characterized in that: The sand feeding hopper sand outlet slot (122) is formed by the lower portion of the length direction of the left side wall of the sand feeding hopper of the sand feeding hopper (12) being inclined toward the right side wall of the sand feeding hopper of the sand feeding hopper (12) and forming a space with a width of 0.5-1.5 cm between the lower portion of the length direction of the right side wall of the sand feeding hopper.

4. The device for laying coated sand for casting according to claim 3, characterized in that: The sand-distributing and sand-distributing device (13) comprises a driving plate cylinder (131), a cylinder slider driving plate (132), a sand-distributing rod reciprocating slider guide rail (133), a sand-distributing rod reciprocating slider (134), a sand-distributing rod (135) and a sand-distributing and sand-distributing plate (136). The front end and the rear end of the driving plate cylinder (131) are respectively supported and fixed on a driving plate cylinder seat (1312), and the driving plate cylinder seat (1312) is fixed on the sand feeding hopper (136). 2) is located on the upper side of the sand feeding hopper cavity (121) and the right side wall of the sand feeding hopper is facing away from the upper side of the sand feeding hopper cavity (121). The action cylinder slider driving plate (132) is fixed to the driving plate action cylinder slider (1311) of the driving plate action cylinder (131). The sand guide rod reciprocates and moves the slider guide rail (133) corresponding to the right side wall of the sand feeding hopper of the sand feeding hopper (12) toward the upper side of the sand feeding hopper cavity (121). The rear end of the sand guide rod reciprocates and moves the slider guide rail (133) to the rear side of the sand feeding hopper (12). The upper edge of the wall is fixed, and the front end is fixed to the upper edge of the front side wall of the sand feeding hopper (12). The sand guide rod reciprocating slider (134) slides with the sand guide rod reciprocating slider guide rail (133) through its slider groove (1341). The upper end of the sand guide rod (135) is formed with a slider fixing plate (1351) bent toward the direction of the sand guide rod reciprocating slider (134). The slider fixing plate (1351) and the sand guide rod reciprocating slider (134) face upward. The lower end of the sand guide rod (135) extends downward in a longitudinal cantilever state to the position of the sand outlet slot (122) of the sand feeding hopper. The sand driving and sand leveling plate (136) is fixed to the left side of the sand guide rod (135) in a longitudinal state and forms a vertical relationship with the left side of the sand guide rod (135). The bottom of the sand driving and sand leveling plate (136) corresponds to the upper side of the sand outlet slot (122) of the sand feeding hopper while maintaining a distance from the sand outlet slot (122).

5. The device for laying coated sand for casting according to claim 4, characterized in that: The driving plate action cylinder (131) is a rodless cylinder; the cross-sectional shape of the reciprocating slider guide rail (133) of the sand guide rod is dovetail-shaped, and the cross-sectional shape of the slider groove (1341) is also dovetail-shaped; the rodless cylinder is a rodless cylinder that works in both forward and reverse directions.

6. The device for laying coated sand for casting according to claim 2, characterized in that: The plate curtain type sand carrying mechanism (2) comprises a left crossbeam support frame (21), a right crossbeam support frame (22), a front crossbeam (23), a rear crossbeam (24), a plate curtain transmission active sprocket (25), a plate curtain transmission driven sprocket (26), a plate curtain (27) and a plate curtain transmission driving device (28), wherein the left crossbeam support frame (21) is supported on the ground at a position corresponding to the lower side of the sand feeding hopper (12), the right crossbeam support frame (22) corresponds to the right side of the left crossbeam support frame (21) and is also supported on the ground, the front crossbeam (23) and the rear crossbeam ( 24) are kept parallel to each other in the longitudinal direction, and the left ends of the front cross beam (23) and the rear cross beam (24) are supported and fixed on the top of the left support frame (21), and the right ends of the front cross beam (23) and the rear cross beam (24) are supported and fixed on the top of the right cross beam support frame (22), and the spacing between the opposite sides of the front cross beam (23) and the rear cross beam (24) is adapted to the width of the plate curtain (27), and the number of the plate curtain transmission driving sprocket (25) is respectively fixed on the front end and the rear end of the plate curtain transmission driving sprocket shaft (251) and is located at the front A pair of plate curtain drive sprockets (26) are respectively fixed at the front and rear ends of the plate curtain drive driven sprocket shaft (261) and located between the opposite sides of the front cross beam (23) and the rear cross beam (24), the front end and rear end of the plate curtain drive driven sprocket shaft (251) are respectively supported by bearing seats on the right ends of the front cross beam (23) and the rear cross beam (24), and the front end of the plate curtain drive driven sprocket shaft (251) also extends to the front side of the front cross beam (23), and the number of plate curtain drive driven sprockets (26) is a pair of plate curtain drive driven sprockets (26) respectively fixed at the front and rear ends of the plate curtain drive driven sprocket shaft (261) and located between the opposite sides of the front cross beam (23) and the rear cross beam (24), The front and rear ends of the panel curtain transmission driven sprocket shaft (261) are rotatably supported on the left ends of the front crossbeam (23) and the rear crossbeam (24) respectively through bearing seats. The panel curtain (27) is located between the front crossbeam (23) and the rear crossbeam (24), and the right end of the panel curtain (27) is sleeved on a pair of panel curtain transmission active sprockets (25), while the left end is sleeved on a pair of panel curtain transmission driven sprockets (26). The panel curtain transmission drive device (28) is arranged on the right support frame (22) of the crossbeam and is transmission-connected to the panel curtain transmission active sprocket shaft (251).

7. The device for laying coated sand for casting according to claim 6, characterized in that: The plate curtain (27) is composed of a plurality of curtain pieces (271), a front chain link (272), a rear chain link (273) and a chain link hinge shaft (274). A pair of curtain piece hinge ears (2711) and a pair of curtain piece hinge ears (2712) are fixed on one side of the curtain piece (271) facing the plate curtain cavity of the plate curtain (27). The pair of curtain piece hinge ears (2711) are fixed on one side of the curtain piece (271), and a hinge ear hole (27111) corresponding to each other is opened on the pair of curtain piece hinge ears (2711). The pair of curtain piece hinge ears (2712) are fixed on the other side of the curtain piece (271) in a state corresponding to the pair of curtain piece hinge ears (2711), and the pair of curtain piece hinge ears (2712) are fixed on the other side of the curtain piece (271) in a state corresponding to the pair of curtain piece hinge ears (2711). 2) are provided with two hinged ear holes (27121) corresponding to each other in position, the pair of curtain piece hinged ears (2712) and the pair of curtain piece hinged ears (2711) on each two adjacent curtain pieces (271) are hingedly connected by the chain link hinge shaft (274), each of the curtain pieces (271) corresponds to a front chain link (272) and a rear chain link (273), and the front chain link (272) corresponds to the front end of the curtain piece (271), and the rear chain link (273) corresponds to the rear end of the curtain piece (271), and a curtain piece sealing overlapped step edge (2713) is formed on one side of the curtain piece (271) in the longitudinal direction for preventing the coated sand from leaking from the gap between adjacent curtain pieces (271). The overlapping step edge (2713) of the sheet sealing seam coincides with the upper surface of the edge portion of one side in the length direction of the adjacent curtain sheet (271); the chain link hinge shaft (274) passes through the chain front link chain plate holes on a pair of chain front link chain plates constituting the chain front link (272), the hinge ear hole 1 (27111), the hinge ear hole 2 (27121) and the chain rear link chain plate holes on a pair of chain rear link chain plates constituting the chain rear link (273); and the chain link hinge shaft front limiting piece is arranged at the front end of the chain link hinge shaft (274) at a position corresponding to the front side of the chain front link (272) to prevent the chain link hinge shaft (274) from moving; and the chain link hinge shaft rear limiting piece is arranged at the rear end of the chain rear link (273) to prevent the chain link hinge shaft (274) from moving. The side position is set at the rear end of the chain link hinge shaft (274) to prevent the chain link hinge shaft (274) from moving. The chain link hinge shaft (274) hinges the front chain link (272) of the chain corresponding to each curtain piece (271), a pair of chain piece hinge ears one (2711), a pair of chain piece hinge ears two (2712) and the rear chain link (273) of the chain to form an endless ring structure. The right ends of the front chain and the rear chain formed by the front chain link (272) and the rear chain link (273) of the chain hinged by the chain link hinge shaft (274) are respectively placed on the aforementioned pair of curtain transmission active sprockets (25), and the left ends are respectively placed on the aforementioned pair of curtain transmission driven sprockets (26).

8. The device for laying coated sand for casting according to claim 6, characterized in that: The panel curtain transmission drive device (28) includes a panel curtain drive motor (281), a panel curtain drive reduction box (282), a panel curtain drive active wheel (283), a panel curtain drive driven wheel (284) and a panel curtain drive transmission belt (285). The panel curtain drive motor (281) is electrically connected to the electrical control box in the use state. The panel curtain drive motor (281) is matched with the panel curtain drive reduction box (282) in transmission and is supported by the panel curtain drive reduction box (282) together with the panel curtain drive motor (281) on the panel curtain drive reduction box support seat (2821), and the panel curtain drive reduction box support seat (2821) is fixed. The plate curtain drive reduction box (282) is fixed on a support seat fixing plate (28211), and the support seat fixing plate (28211) is fixed on the right support frame (22) of the crossbeam, wherein the plate curtain drive reduction box output shaft (2822) faces forward, the plate curtain drive driving wheel (283) is fixed on the plate curtain drive reduction box output shaft (2822), and the plate curtain drive driven wheel (284) is fixed on the front end of the plate curtain drive driving sprocket shaft (251), one end of the plate curtain drive transmission belt (285) is sleeved on the plate curtain drive driving wheel (283), and the other end is sleeved on the plate curtain drive driven wheel (284).

9. The device for laying coated sand for casting according to claim 8, characterized in that: The plate curtain driving active wheel (283) and the plate curtain driving driven wheel (284) are sprockets or pulleys, and the plate curtain driving transmission belt (285) is a chain or a belt.

10. The device for laying coated sand for casting according to claim 6, characterized in that: A mold signal collector (29) is provided at the upper left end of the front crossbeam (23) or the rear crossbeam (24) for collecting signals of a mold to be cast placed on the coated sand on the surface of the plate curtain (27). The mold signal collector (29) is a photoelectric switch, which is electrically connected to the electrical control box when in use.

Images