Secondary sanding device
By incorporating a spiral conveyor mechanism and conveyor belt into the sand-laying device, the problem of excessive weight caused by volumetric redundancy in existing technologies is solved, thereby improving production efficiency.
Patent Information
- Application Number
- CN202423299419.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-30
AI Technical Summary
In existing sand-laying devices, the redundant volume of the sand-laying trough results in a large weight, which limits the improvement of operating speed and affects production efficiency.
The system employs a primary sand-laying trough and a spiral conveyor mechanism, combined with a secondary sand-laying device. By setting up a stop mechanism and a conveyor belt, the distribution and speed of the molding sand are controlled, reducing redundancy and avoiding gaps in the molding sand layer.
It achieves uniform distribution of molding sand, reduces the weight of the sand spreading device, improves production efficiency, and enhances operating speed.
Smart Images
Figure CN223733773U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to 3D printing equipment field especially two -stage sand spreading device. BACKGROUND
[0002] Sand spreading device is an important part of sand mould 3D printer, and the conventional sand spreading device comprises a sand spreading groove, the bottom of the sand spreading groove is provided with a strip-shaped sand outlet extending horizontally, and the sand spreading groove can be moved forward and backward to spread the sand in the sand spreading groove evenly; in order to avoid the problem that the sand spreading groove is exhausted in some places and causes the sand layer to be laid to be empty in some places, the volume of the sand spreading groove is generally designed redundantly, and the sand carried by the sand spreading groove during operation is much more than the amount required for laying a layer; however, this also causes the weight of the sand spreading groove during operation to be very large, which restricts the improvement of the operation speed and is not conducive to improving the production efficiency. SUMMARY
[0003] The utility model discloses at least one of the technical problems in the prior art is solved.
[0004] The two-stage sand spreading device according to the utility model embodiment comprises:
[0005] The first sand spreading assembly comprises a base frame and a first sand spreading groove arranged on the base frame, a spiral conveying mechanism is arranged in the first sand spreading groove, a first sand outlet is arranged at the bottom of the first sand spreading groove, and a cutoff mechanism is arranged on the first sand outlet.
[0006] The second sand spreading assembly comprises a translation frame and a second sand spreading groove and a conveying belt arranged on the translation frame, the translation frame is slidably connected with the base frame in front and back, the second sand spreading groove is arranged below the first sand outlet, a second sand outlet is arranged at the bottom of the second sand spreading groove, the conveying belt is located below the second sand outlet, a sand outlet gap is arranged between the conveying belt and the second sand outlet, and the conveying direction of the conveying belt is the front and back direction.
[0007] The two-stage sand spreading device according to the utility model embodiment has at least the following technical effects: the first sand spreading groove and the spiral conveying mechanism are arranged, which is beneficial to uniformly distribute the sand falling into the second sand spreading groove in the horizontal direction, avoid the problem that the sand in the second sand spreading groove is exhausted in some places in advance, reduce the redundant amount of sand that needs to be carried by the second sand spreading groove and reduce the weight; meanwhile, the conveying belt is arranged, the sand outlet speed of the second sand outlet can be accurately controlled, the sand in the second sand spreading groove is avoided from being exhausted too fast to cause the sand layer to be empty in some places, the redundant amount of sand that needs to be carried by the second sand spreading groove is also reduced, the weight is reduced, the problem that the sand layer is empty in some places is avoided without carrying excessive sand in the second sand spreading groove, the operation speed is improved, and the production efficiency is improved.
[0008] According to some embodiments of the present application, the cutting mechanism comprises a transversely arranged lower sand roller, and a plurality of transversely extending grooves are arranged on the outer circumferential surface of the lower sand roller.
[0009] According to some embodiments of the present application, the base frame comprises a first cross beam, and the first sand laying groove is arranged on the first cross beam, and the lower sand roller is arranged below the first cross beam.
[0010] According to some embodiments of the present application, the translation frame is provided with a sand shoveling rod and a linear actuator for driving the sand shoveling rod to move transversely, and the sand shoveling rod is arranged on the upper side of the second sand laying groove.
[0011] According to some embodiments of the present application, the linear actuator is a rodless cylinder.
[0012] According to some embodiments of the present application, the translation frame comprises a second cross beam, and the top edge of the second sand laying groove is provided with a raised edge, and the raised edge is arranged on the upper side of the second cross beam.
[0013] According to some embodiments of the present application, the linear actuator is arranged on the side of the second cross beam away from the second sand laying groove, and the rear end of the sand shoveling rod is provided with a downwardly bent bending portion, and the bending portion is connected with the linear actuator.
[0014] According to some embodiments of the present application, the conveying belt is arranged below the second cross beam.
[0015] According to some embodiments of the present application, the first sand laying groove is provided with a vibrator.
[0016] According to some embodiments of the present application, a recovery groove is arranged directly below the first sand laying assembly, and the height position of the recovery groove is below the second sand laying assembly.
[0017] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0018] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of embodiments, taken in conjunction with the accompanying drawings, in which:
[0019] Figure 1 is a three-dimensional structure schematic diagram of a second sand laying device of an embodiment of the present application;
[0020] Figure 2 is a structure schematic diagram of a first sand laying assembly in an embodiment of the present application;
[0021] Figure 3 Fig. 1 is a structural schematic diagram of a first sand paving assembly in an embodiment of the present application;
[0022] In the drawings:
[0023] 100 - base frame; 101 - first cross beam; 110 - first sand paving groove; 120 - spiral conveying shaft; 121 - first motor; 130 - sand roller; 131 - second motor; 132 - groove; 140 - vibrator; 200 - translation frame; 201 - second cross beam; 210 - second sand paving groove; 211 - convex edge; 220 - conveying belt; 230 - sand scraping rod; 240 - rodless cylinder; 300 - recovery groove. DETAILED DESCRIPTION
[0024] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are only used to explain the present application, and cannot be understood as a limitation of the present application.
[0025] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application. In addition, several means one or more, and multiple means two or more, greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If it is described as first, second, etc., it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.
[0026] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.
[0027] The embodiments of the present application are described below with reference to Figures 1 to 3 The second sand paving device of the embodiments of the present application is described.
[0028] The second sand paving device of the embodiments of the present application is described.
[0029] The primary sand paving assembly comprises a base frame 100 and a primary sand paving groove 110 arranged on the base frame 100. Referring to Figure 1 The base frame 100 can be placed on the ground, the primary sand paving groove 110 is fixedly arranged on the top rear side of the base frame 100, the primary sand paving groove 110 extends horizontally, a spiral conveying mechanism is arranged in the primary sand paving groove 110, the spiral conveying mechanism comprises a spiral conveying shaft 120, the spiral conveying shaft 120 extends horizontally, both ends of the spiral conveying shaft 120 are rotatably connected to the primary sand paving groove 110, the base frame 100 is further provided with a first motor 121 for driving the spiral conveying shaft 120, one end of the spiral conveying shaft 120 penetrates through the side wall of the primary sand paving groove 110 and is in transmission connection with the driving shaft of the first motor 121, and the driving shaft of the first motor 121 and the spiral conveying shaft 120 can be connected through a shaft coupling, a pulley belt mechanism, a gear mechanism or other suitable transmission mechanism.
[0030] The bottom of the primary sand paving groove 110 is provided with a first sand outlet, the first sand outlet extends horizontally in a strip shape, the first sand outlet is provided with a cutoff mechanism, and the cutoff mechanism is used to control whether the first sand outlet falls sand.
[0031] The secondary sand paving assembly comprises a translation frame 200, a secondary sand paving groove 210 and a conveying belt 220 arranged on the translation frame 200. Referring to Figure 3 The secondary sand paving groove 210 is fixedly arranged on the translation frame 200, the translation frame 200 is slidably connected to the base frame 100, the translation frame 200 and the base frame 100 can be slidably connected through a guide rail and a sliding block mechanism, and the base frame 100 is provided with a second driver for driving the translation frame 200 to move forward and backward, the second driver can be an electric push rod, a linear motor or other suitable device.
[0032] The secondary sand paving groove 210 is arranged below the first sand outlet, the forward and backward movement of the translation frame 200 relative to the base frame 100 has a sand supplement state, in the sand supplement state, the translation frame 200 moves to the rear limit position, and the secondary sand paving groove 210 is located directly below the first sand outlet, the secondary sand paving groove 210 extends horizontally, the bottom of the secondary sand paving groove 210 is provided with a second sand outlet, the second sand outlet extends horizontally in a strip shape, the conveying belt 220 is located below the second sand outlet, a sand outlet gap is arranged between the conveying belt 220 and the second sand outlet, the conveying direction of the conveying belt 220 is the forward and backward direction, and the conveying belt 220 can be driven by a servo cylinder motor.
[0033] When in use, the molding sand supplied externally to the sand 3D printer falls from above the first sand laying groove 110, and the spiral conveying mechanism can convey the molding sand in the lateral direction to uniformly distribute the molding sand in the first sand laying groove 110 in the lateral direction; when the second sand laying assembly returns to the first sand laying assembly to replenish sand after laying a layer of molding sand, the cutoff structure is controlled to make the molding sand fall from the first sand outlet to the second sand laying groove 210, and then the translation frame 200 is controlled to move forward and the conveying belt 220 is started, so that the sand laying is completed. The first sand laying groove 110 and the spiral conveying mechanism are arranged, which is beneficial to uniformly distribute the molding sand falling into the second sand laying groove 210 in the lateral direction, avoids the problem that the molding sand in the second sand laying groove 210 is exhausted in advance in a certain place, is beneficial to reduce the redundant amount of the molding sand that needs to be carried by the second sand laying groove 210, and reduces the weight; meanwhile, the sand falling speed of the second sand outlet can be accurately controlled through the arrangement of the conveying belt 220, avoids the problem that the molding sand layer is left in a certain place due to the molding sand in the second sand laying groove 210 being exhausted too fast, and is also beneficial to reduce the redundant amount of the molding sand that needs to be carried by the second sand laying groove 210, and reduces the weight; the problem that the molding sand layer is left in a certain place is avoided without carrying excessive molding sand in the second sand laying groove, which is beneficial to improve the running speed and improve the production efficiency.
[0034] In some embodiments of the utility model, refer to Figure 2 The cutoff mechanism comprises a sand falling roller 130 arranged in the lateral direction, the outer circumferential surface of the sand falling roller 130 is provided with a plurality of grooves 132 extending in the lateral direction, and the plurality of grooves 132 are arranged at intervals in the circumferential direction of the sand falling roller 130. The sand falling roller 130 is rotationally arranged on the base frame 100, the base frame 100 is provided with a second motor 131 for driving the sand falling roller 130 to rotate, and the driving shaft of the second motor 131 and the sand falling roller 130 are connected in linkage through a belt pulley belt mechanism or other suitable transmission mechanism; in this way, when the sand falling roller 130 stops, the sand falling roller 130 blocks the bottom of the first sand outlet, when the sand falling roller 130 rotates, the molding sand at the first sand outlet can fall into the groove 132 on the top of the sand falling roller 130, and then rotate with the sand falling roller 130 to the bottom of the sand falling roller 130, and then fall into the second sand laying groove 210, so as to achieve the purpose of controlling whether the molding sand falls from the first sand outlet. Meanwhile, the arrangement of the sand falling roller 130 is also beneficial to uniformly falling the molding sand in the lateral direction.
[0035] In some embodiments of the utility model, the base frame 100 comprises a first cross beam 101, the first sand laying groove 110 is arranged on the first cross beam 101, and the sand falling roller 130 is arranged below the first cross beam 101. The number of the first cross beams 101 can be two, and the first sand laying groove 110 is arranged between the two first cross beams; in this way, the height position of the sand falling roller 130 is relatively close to the top of the second sand laying groove 210, which is beneficial to accurately falling the molding sand into the second sand laying groove 210.
[0036] In some embodiments of the utility model, the translation frame 200 is provided with a sand scraping rod 230 and a linear driver for driving the sand scraping rod 230 to move laterally, and the sand scraping rod 230 is arranged on the upper side of the secondary sand laying groove 210. The sand scraping rod 230 is arranged in front of and behind the sand scraping rod 230; in the sand supplementing state, the sand scraping rod 230 is arranged between the secondary sand laying groove 210 and the sand dropping roller 130; it should be noted that even if the sand in the primary sand laying groove 110 is uniformly distributed in the lateral direction, when it falls into the secondary sand laying groove 210, it is still possible that it is piled higher in some places and less in some places; the sand scraping rod 230 is arranged in the embodiment, and the sand scraping rod 230 can move left and right to scrape the sand in the secondary sand laying groove 210, so that the sand in the secondary sand laying groove 210 is uniformly distributed in the lateral direction.
[0037] In some embodiments of the utility model, the linear driver is a rodless cylinder 240. The stroke of the rodless cylinder 240 is large, the structure is simple, the weight is small, and it is suitable for being installed on the translation frame 200 to drive the sand scraping rod 230. The rodless cylinder 240 has a main part and a movable part, the main part is fixedly arranged on the translation frame 200, and the sand scraping rod 230 is arranged on the movable part.
[0038] In some embodiments of the utility model, the translation frame 200 includes a second cross beam 201, the top edge of the secondary sand laying groove 210 is provided with a convex edge 211, and the convex edge 211 is arranged on the upper side of the second cross beam 201. The number of the second cross beam 201 can be two, and the two second cross beams 201 are arranged in front of and behind the secondary sand laying groove 210. The secondary sand laying groove 210 is arranged between the two second cross beams 201; in this way, the second cross beam 201 can support the convex edge 211 from bottom to top, which is conducive to the stable connection between the secondary sand laying groove 210 and the translation frame 200.
[0039] In some embodiments of the utility model, the linear driver is arranged on the side of the second cross beam 201 away from the secondary sand laying groove 210, the rear end of the sand scraping rod 230 is provided with a downwardly bent bending part, and the bending part is connected with the linear driver. In this way, the height position of the linear driver can be located on the lower side of the sand scraping rod 230, and the linear driver will not collide with the primary sand laying assembly when the translation frame 200 moves forward and backward, which is conducive to making the height position of the primary sand laying assembly close to the top of the secondary sand laying groove 210, and conducive to the accurate falling of the sand into the secondary sand laying groove 210.
[0040] In some embodiments of the utility model, the conveying belt 220 is arranged below the second cross beam 201. In this way, the height position of the conveying belt 220 is close to the printing surface of the sand mold 3D printer, which is conducive to the accurate falling of the sand into the printing surface.
[0041] In some embodiments of the utility model, the primary sand laying groove 110 is provided with a vibrator 140. In this way, the sand can be prevented from adhering to the side wall of the primary sand laying groove 110, and then the sand falling at the first sand dropping port is uniformly distributed in the lateral direction.
[0042] In some embodiments of the utility model, the first sand laying assembly is provided with a recovery groove 300 directly below, and the height position of the recovery groove 300 is below the second sand laying assembly. In the sand supplementing state, the second sand laying assembly is arranged between the first sand laying assembly and the recovery groove 300. It can be understood that the sand pouring roller 130 and the sand shoveling rod 230 may both cause some sand to splash out during operation. The sand spilling out during the sand supplementing process can be collected in the recovery groove 300 by arranging the recovery groove 300, so as to facilitate the recycling of the sand.
[0043] The preferred embodiments of the utility model are specifically described above, but the utility model is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the range defined by the claims of the application.
Claims
1. A secondary sand spreading device, characterized in that, The application relates to a sand paving device. The sand paving device comprises a primary sand paving assembly and a secondary sand paving assembly. The primary sand paving assembly comprises a base frame and a primary sand paving groove arranged on the base frame.
2. The secondary sanding device of claim 1, wherein: The primary sand paving groove is provided with a spiral conveying mechanism.
3. The secondary sanding device of claim 2, wherein: The bottom of the primary sand paving groove is provided with a first sand outlet.
4. The secondary sanding device of claim 1, wherein: The first sand outlet is provided with a cutoff mechanism.
5. The secondary sanding device of claim 4, wherein: The secondary sand paving assembly comprises a translation frame and a secondary sand paving groove and a conveying belt arranged on the translation frame.
6. The secondary sanding device of claim 4, wherein: The translation frame is slidably connected to the front and back of the base frame.
7. The secondary sanding device of claim 6, wherein: The secondary sand paving groove is arranged below the first sand outlet.
8. The secondary sanding device of claim 6, wherein: The bottom of the secondary sand paving groove is provided with a second sand outlet.
9. The secondary sanding device of claim 1, wherein: The conveying belt is arranged below the second sand outlet.
10. The secondary sanding device of claim 1, wherein: The conveying belt and the second sand outlet are provided with a sand outlet gap. The conveying direction of the conveying belt is the front and back direction. The cutoff mechanism comprises a sand outlet roller arranged in the transverse direction. The outer circumferential surface of the sand outlet roller is provided with a plurality of transversely extending grooves. The grooves are arranged in the circumferential direction of the sand outlet roller. The base frame comprises a first cross beam. The primary sand paving groove is arranged on the first cross beam. The sand outlet roller is arranged below the first cross beam. The translation frame is provided with a sand scraping rod and a linear actuator for driving the sand scraping rod to move in the transverse direction. The sand scraping rod is arranged on the upper side of the secondary sand paving groove. The linear actuator is a rodless air cylinder. The translation frame comprises a second cross beam. The top edge of the secondary sand paving groove is provided with a convex edge. The convex edge is arranged on the upper side of the second cross beam. The linear actuator is arranged on the side of the second cross beam away from the secondary sand paving groove. The rear end of the sand scraping rod is provided with a downwardly bent bending portion. The bending portion is connected to the linear actuator. The conveying belt is arranged below the second cross beam. The primary sand paving groove is provided with a vibrator. The primary sand paving assembly is provided with a recovery groove below. The height position of the recovery groove is below the secondary sand paving assembly.