Static pressure line sand box sand scraping device and static pressure molding equipment

Abstract

The utility model belongs to the foundry technical field, concretely relates to a kind of static pressure linear sand box sand scraping device and foundry static pressure molding equipment, the device includes: sand box, both sides outer wall are provided with convex strip;Conveying frame, including frame body and the several rollers of rotation being set on the frame body, the roller with the lower end surface of the convex strip abuts, to convey sand box;Limiting mechanism, it is symmetrically set in the both sides of the conveying frame, and the limiting mechanism of each side includes at least one first limiting wheel for pressing from above the upper end surface of the convex strip, to limit the vertical runout of sand box;And at least one second limiting wheel for from lateral top the convex strip side wall, to limit the horizontal movement of sand box;Scraper mechanism, it is set below the sand box, for scraping the excess sand of sand box bottom.

Description

Technical Field

[0001] This utility model belongs to the field of casting technology, and in particular relates to a static pressure line sand box scraping device and a static pressure molding equipment for casting. Background Technology

[0002] The sand scraping station is a crucial part of the casting static pressure molding equipment. Its main function is to scrape off the excess sand on the sand box to ensure a smooth parting surface.

[0003] In actual production, the sand box is prone to shaking when it is transported to the sand scraping station due to factors such as positioning gaps and inertia. This shaking causes uneven force on the scraping blade, resulting in uneven sand scraping and affecting the quality of subsequent castings. In addition, the shaking of the sand box also causes severe impact and wear on the scraping blade, making it prone to edge curling and drastically reducing its service life.

[0004] Therefore, how to solve the problem of uneven sand scraping caused by sand box shaking is a technical problem that urgently needs to be solved by those skilled in the art.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0006] This disclosure provides at least one static pressure line sand box scraping device and a casting static pressure molding equipment.

[0007] In a first aspect, embodiments of this disclosure provide a static pressure line sand box scraping device, comprising: The sand box has raised strips on both outer walls. A conveyor frame includes a frame body and a plurality of rollers rotatably mounted on the frame body, the rollers abutting against the lower end face of the convex strip to convey a sand box; The limiting mechanism is symmetrically arranged on both sides of the conveyor frame. Each side of the limiting mechanism includes at least one first limiting wheel for pressing against the upper end face of the protrusion from above to limit the vertical jumping of the sand box; and at least one second limiting wheel for pressing against the side wall of the protrusion from the side to limit the horizontal movement of the sand box. A scraper mechanism is located below the sand box and is used to scrape off the excess sand at the bottom of the sand box.

[0008] In one optional embodiment, there are multiple first and second limiting wheels, which are arranged at intervals along the sand box conveying direction.

[0009] In one optional embodiment, the rotation axis of the first limiting wheel is arranged in a horizontal direction, and the rotation axis of the second limiting wheel is arranged in a vertical direction.

[0010] In one optional embodiment, the limiting mechanism further includes a bracket fixed to the frame; and, The first limiting wheel is rotatably mounted on the bracket, and the second limiting wheel is rotatably mounted on the frame via a rotating shaft.

[0011] In one alternative embodiment, the scraper mechanism includes a drive assembly, a slide rail, a scraper mounting bracket, and a scraper. The scraper is mounted on the scraper mounting bracket, and the cutting edge of the scraper abuts against the bottom surface of the sand box; The scraper mounting bracket is slidably connected to the slide rail; The drive assembly is adapted to drive the scraper to reciprocate in a direction parallel to the bottom surface of the sand box.

[0012] In one alternative embodiment, the drive component is a cylinder, and the piston rod of the cylinder is connected to the scraper mounting bracket.

[0013] In one optional embodiment, the angle between the scraper and the bottom surface of the sand box is α, where α satisfies: 15°≤α≤45°.

[0014] Secondly, this disclosure also provides a static pressure line sand box scraping device, characterized in that it includes: The sand box has raised strips on both outer walls. A conveyor frame includes a frame body and a plurality of rollers rotatably mounted on the frame body, the rollers abutting against the lower end face of the convex strip to convey a sand box; The limiting mechanism is symmetrically arranged on both sides of the conveyor frame. Each side of the limiting mechanism includes at least one first limiting wheel for pressing against the upper end face of the protrusion from above to limit the vertical jumping of the sand box; and at least one second limiting wheel for pressing against the side wall of the protrusion from the side to limit the horizontal movement of the sand box. The scraper mechanism includes a scraper that abuts against the lower surface of the sand box. The scraping edge of the scraper is a rectangular strip structure with a rectangular cross-section. One long edge of the rectangular cross-section abuts against the lower surface of the sand box to scrape off excess sand.

[0015] Thirdly, this disclosure also provides a casting static pressure molding device, including the aforementioned static pressure line sand box scraping device.

[0016] The beneficial effects of this utility model are that the static pressure line sand box scraping device sets limiting mechanisms on both sides of the sand box. The first limiting wheel of the limiting mechanism restricts the vertical jumping of the sand box, and the second limiting wheel restricts the horizontal movement of the sand box. The two work together to make the sand box less prone to shaking when it is transported to the scraping station, thereby avoiding the problem of uneven scraping caused by the shaking of the sand box. At the same time, it also reduces the impact and wear on the scraper and extends the service life of the scraper.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and drawings.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A three-dimensional static pressure line sand box scraping device provided in this embodiment of the present disclosure Figure 1 ; Figure 2 A three-dimensional static pressure line sand box scraping device provided in this embodiment of the present disclosure Figure 2 ; Figure 3 This is a side view of a static pressure line sand box scraping device provided in an embodiment of the present disclosure.

[0021] In the picture: 100, Sand box; 110, Raised bar; 200, Conveyor frame; 210, Frame body; 220, Roller; 300, Limiting mechanism; 310, First limiting wheel; 320, Second limiting wheel; 330, Bracket; 340, Rotating shaft; 400, Scraper mechanism; 410, Drive assembly; 420, Slide rail; 430, Scraper mounting bracket; 440, Scraper. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0024] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0025] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0026] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0027] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0028] Research has revealed the following drawbacks of existing technologies: In actual production, the sand box is prone to shaking when transported to the scraping station due to factors such as positioning gaps and inertia. This shaking causes uneven force on the scraping blade, resulting in uneven sand scraping and affecting the quality of subsequent castings. Furthermore, the shaking of the sand box also causes severe impact and wear on the scraping blade, leading to edge curling and a drastically reduced lifespan.

[0029] Based on the above research, this disclosure provides a static pressure line sand box scraping device. By setting limiting mechanisms on both sides of the sand box, the sand box is limited from the vertical and horizontal directions respectively, so that it is not easy to shake when it is transported to the scraping station, thus solving the above problems.

[0030] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] See Figure 1This disclosure provides a static pressure line sand box scraping device, including: a sand box 100 for holding molding sand, with protruding ribs 110 on both outer walls of the sand box 100. A conveyor frame 200 is provided below the ribs 110, the conveyor frame 200 including a frame body 210 and a plurality of rollers 220 rotatably mounted on the frame body 210. The frame body 210 serves as a track for transporting the sand box 100, and the rollers 220 abut against the lower end face of the ribs 110. When the rollers 220 rotate, they can drive the sand box 100 to move along the extension direction of the frame body 210. The conveyor frame 200 is symmetrically equipped with limiting mechanisms 300 on both sides. Each limiting mechanism 300 includes at least one first limiting wheel 310 for pressing against the upper end face of the protrusion 110 from above to limit the vertical movement of the sand box 100; and at least one second limiting wheel 320 for pressing against the side wall of the protrusion 110 from the side to limit the horizontal movement of the sand box 100. When the sand box 100 moves to the sand scraping station, the scraper mechanism 400 below the sand box 100 is adapted to scrape off the residual sand at the bottom of the sand box 100. By limiting the vertical movement of the sand box 100 with the first limiting wheel 310 and limiting the horizontal movement of the sand box 100 with the second limiting wheel 320, the two work together to prevent the sand box 100 from shaking when it is conveyed to the sand scraping station, thereby avoiding the problem of uneven sand scraping caused by the shaking of the sand box 100, and also reducing the impact wear on the scraper 440 and extending the service life of the scraper 440.

[0034] See Figure 1 and Figure 2 In some embodiments, multiple first limiting wheels 310 and second limiting wheels 320 are provided on each side, and are arranged at intervals along the conveying direction of the sand box 100. This arrangement makes the limiting effect no longer a few isolated points, but forms a continuous and stable limiting area. Throughout the entire process of the sand box 100 entering, passing through and leaving the sand scraping station, its protrusions 110 are always constrained by multiple sets of limiting wheels, effectively avoiding instantaneous jumping or displacement that may occur due to interruption of support or constraint during the stroke, thereby ensuring the stability of the sand scraping action throughout the entire process.

[0035] See also Figure 2 In some embodiments, such as Figure 2As shown by the dashed line, the rotation axis of the first limiting wheel 310 is set horizontally, allowing its wheel surface to roll smoothly on the upper surface of the protrusion 110, thereby effectively restricting the sand box 100's degree of freedom in the vertical direction and preventing it from jumping upwards. The rotation axis of the second limiting wheel 320 is set vertically, allowing its wheel surface to form good contact with the side wall of the protrusion 110 and roll, thereby effectively restricting the sand box 100's degree of freedom in the horizontal plane and preventing it from swaying or deviating. By setting the rotation axes of the first limiting wheel 310 and the second limiting wheel 320 to horizontal and vertical respectively, they can precisely and with low friction constrain the movement of the sand box 100 in the vertical and horizontal directions, respectively. Together, they form a stable three-dimensional spatial limiting system.

[0036] See also Figure 1 In some embodiments, the limiting mechanism 300 further includes a bracket 330, which may, but is not limited to, be fixed to the frame 210 by welding. The pivot 340 of the first limiting wheel 310 is mounted horizontally on the bracket 330, such that the cylindrical rolling surface of the first limiting wheel 310 abuts against the horizontal upper surface of the protrusion 110 of the sand box 100. When the sand box 100 moves, the first limiting wheel 310 adapts to its movement by rotating about a horizontal axis, while simultaneously providing a downward clamping force. A pivot 340 is vertically disposed on the frame 210, and a second limiting wheel 320 is rotatably disposed on the pivot 340. The cylindrical rolling surface of the second limiting wheel 320 contacts the vertical sidewall of the protrusion 110 of the sand box 100 in parallel. When the sand box 100 moves, the second limiting wheel 320 adapts to its movement by rotating about a vertical axis, while simultaneously providing lateral constraint. As the sand box 100 moves along the conveying direction, the first limiting wheel 310 rotates around a horizontal axis, limiting vertical displacement and reducing wear. The second limiting wheel 320 rotates around a vertical axis, converting the horizontal swaying tendency of the sand box 100 into rolling friction, limiting horizontal displacement and ensuring smooth guidance. This limiting method based on rolling friction has less resistance and causes less damage to the equipment and the sand box 100 compared to sliding friction.

[0037] See Figure 1 and Figure 3 In some embodiments, the scraper mechanism 400 includes a drive assembly 410, a slide rail 420, a scraper mounting bracket 430, and a scraper 440. The scraper 440 is fixedly mounted on the scraper mounting bracket 430, and its cutting edge is adjusted to maintain contact with the bottom surface of the sand box 100. The scraper mounting bracket 430 is slidably connected to the slide rail 420, which is fixedly mounted on the frame. The drive assembly 410 is connected to the scraper mounting bracket 430 and drives it, together with the scraper 440, to reciprocate in a direction parallel to the bottom surface of the sand box 100 to scrape off excess sand from the bottom surface of the sand box 100.

[0038] See also Figure 3 In some embodiments, the drive assembly 410 is a cylinder, with its cylinder body fixed to the frame and its piston rod connected to the scraper mounting bracket 430. A slide rail 420 is arranged parallel to the lower part of the sand box 100's conveying path. The extension and retraction direction of the cylinder's piston rod is set to horizontal and parallel to the bottom surface of the sand box 100. The scraper 440 is a long strip of alloy steel, detachably mounted on the scraper mounting bracket 430 by bolts. During sand scraping, the cylinder drives the scraper mounting bracket 430 to slide back and forth along the extension direction of the slide rail 420, and the scraper 440 fixed thereon scrapes away the remaining sand from the bottom surface of the sand box 100. After the sand scraping stroke ends, the cylinder piston rod retracts, driving the scraper 440 back to its initial position, ready for the next work cycle.

[0039] See also Figure 3 In some embodiments, the angle between the scraper 440 and the bottom surface of the sand box 100 is α, where α satisfies: 15°≤α≤45°, preferably 30°. A 30° angle ensures that the wear surface of the scraper 440 is evenly stressed. An angle that is too large or too small will cause stress concentration at a single point on the blade tip, resulting in localized rapid wear. The preferred 30° angle allows for a more even distribution of wear across the entire blade contact surface, thereby extending the service life of the scraper 440.

[0040] See Figure 1 Some embodiments also provide a static pressure line sand box scraping device comprising: a sand box 100, wherein both outer walls of the sand box are provided with protruding strips 110; a conveying frame 200, including a frame body 210 and a plurality of rollers 220 rotatably disposed on the frame body 210, wherein the rollers 220 abut against the lower end face of the protruding strips 110 to convey the sand box 100; and limiting mechanisms 300, symmetrically disposed on both sides of the conveying frame 200, wherein each limiting mechanism 300 includes at least one for pressing against the sand box from above. The upper end face of the protrusion 110 is provided with a first limiting wheel 310 to limit the vertical movement of the sand box 100; and at least one second limiting wheel 320 is provided to abut against the side wall of the protrusion 110 from the side to limit the horizontal movement of the sand box 100; a scraper mechanism 400 is provided, including a scraper 440 that abuts against the lower surface of the sand box 100, wherein the scraping edge of the scraper 440 is a rectangular strip structure with a rectangular cross-section; one long edge of the rectangular cross-section abuts against the lower surface of the sand box 100 to scrape off excess sand.

[0041] See also Figure 3The scraping working part (i.e., the cutting edge in the traditional sense) of scraper 440 is a rectangular strip structure with a rectangular cross-section. During scraping, instead of using a sharp corner for cutting, one long edge of the rectangular cross-section abuts against the lower surface of the sand box 100, removing excess sand in a scraping motion. By using a rectangular cross-section, the section modulus of the scraper 440's working part is significantly increased, resulting in rigidity and impact resistance far superior to a wedge-shaped cutting edge. Although the initial sharpness is slightly reduced, it greatly improves resistance to edge curling and chipping, thus achieving a longer stable working life and more reliable scraping effect in harsh casting environments. Both long edges of the rectangular cross-section of scraper 440 can be used as scraping edges. When one working edge becomes rounded due to normal wear, reducing the scraping effect, simply remove scraper 440 from the mounting bracket, rotate it 180 degrees, and reinstall it to use the unworn long edge as a new working edge. This design theoretically doubles the effective service life of a single scraper 440.

[0042] Some embodiments also provide a casting static pressure molding apparatus, including a sand scraping device using the static pressure line sand box 100 in the above embodiments.

[0043] In summary, the sand scraping device of this static pressure line sand box 100, by setting limiting mechanisms 300 on both sides of the sand box 100, the first limiting wheel 310 of the limiting mechanism 300 restricts the vertical jumping of the sand box 100, and the second limiting wheel 320 restricts the horizontal movement of the sand box 100. The two work together to make the sand box 100 less prone to shaking when it is transported to the sand scraping station, thereby avoiding the problem of uneven sand scraping caused by the shaking of the sand box 100. At the same time, it also reduces the impact wear on the scraper 440 and extends the service life of the scraper 440.

[0044] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0046] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0047] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0048] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A static pressure line sand box scraping device, characterized in that, include: The sand box (100) has raised strips (110) on both outer walls. The conveyor frame (200) includes a frame body (210) and a plurality of rollers (220) rotatably disposed on the frame body (210), the rollers (220) abutting against the lower end face of the protrusion (110) to convey the sand box (100). The limiting mechanisms (300) are symmetrically arranged on both sides of the conveyor frame (200). Each limiting mechanism (300) includes at least one first limiting wheel (310) for pressing against the upper end face of the protrusion (110) from above to limit the vertical jumping of the sand box (100); and at least one second limiting wheel (320) for abutting against the side wall of the protrusion (110) from the side to limit the horizontal movement of the sand box (100). A scraper mechanism (400) is provided below the sand box (100) for scraping off excess sand from the bottom of the sand box (100).

2. The static pressure line sand box scraping device as described in claim 1, characterized in that, There are multiple first limiting wheels (310) and second limiting wheels (320), which are arranged at intervals along the conveying direction of the sand box (100).

3. The static pressure line sand box scraping device as described in claim 1, characterized in that, The rotation axis of the first limiting wheel (310) is set in the horizontal direction, and the rotation axis of the second limiting wheel (320) is set in the vertical direction.

4. The static pressure line sand box scraping device as described in claim 1, characterized in that, The limiting mechanism (300) further includes a bracket (330) fixed to the frame (210); and, The first limiting wheel (310) is rotatably mounted on the bracket (330), and the second limiting wheel (320) is rotatably mounted on the frame (210) via a rotating shaft (340).

5. The static pressure line sand box scraping device as described in claim 1, characterized in that, The scraper mechanism (400) includes a drive assembly (410), a slide rail (420), a scraper mounting bracket (430), and a scraper (440). The scraper (440) is mounted on the scraper mounting bracket (430), and the cutting edge of the scraper (440) abuts against the bottom surface of the sand box (100); The scraper mounting bracket (430) is slidably connected to the slide rail (420); The drive assembly (410) is adapted to drive the scraper (440) to reciprocate in a direction parallel to the bottom surface of the sand box (100).

6. The static pressure line sand box scraping device as described in claim 5, characterized in that, The drive assembly (410) is a cylinder, and the piston rod of the cylinder is connected to the scraper mounting bracket (430).

7. The static pressure line sand box scraping device as described in claim 5, characterized in that, The angle between the scraper (440) and the bottom surface of the sand box (100) is α, where α satisfies: 15°≤α≤45°.

8. A static pressure line sand box scraping device, characterized in that, include: The sand box (100) has raised strips (110) on both outer walls. The conveyor frame (200) includes a frame body (210) and a plurality of rollers (220) rotatably disposed on the frame body (210), the rollers (220) abutting against the lower end face of the protrusion (110) to convey the sand box (100). The limiting mechanisms (300) are symmetrically arranged on both sides of the conveyor frame (200). Each limiting mechanism (300) includes at least one first limiting wheel (310) for pressing against the upper end face of the protrusion (110) from above to limit the vertical jumping of the sand box (100); and at least one second limiting wheel (320) for abutting against the side wall of the protrusion (110) from the side to limit the horizontal movement of the sand box (100). The scraper mechanism (400) includes a scraper (440) that abuts against the lower surface of the sand box (100). The scraping edge of the scraper (440) is a rectangular strip structure with a rectangular cross-section. One long edge of the rectangular cross section abuts against the lower surface of the sand box (100) to scrape off excess sand.

9. The static pressure line sand box scraping device as described in claim 8, characterized in that, There are multiple first limiting wheels (310) and second limiting wheels (320), which are arranged at intervals along the conveying direction of the sand box (100).

10. A casting static pressure molding device, characterized in that, Includes the static pressure line sand box scraping device as described in any one of claims 1-9.

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