Sand scraping device and sand mold 3D printing equipment

Abstract

The utility model relates to a sand scraping device and sand mold 3D printing equipment. The sand scraping device comprises a supporting structure, a translation seat, a scraper and a driving mechanism. The translation base is slidably installed on the supporting structure in the linear direction. The scraper is mounted on the translation seat, and at least part of the scraper is located in the sand paving hopper. The driving mechanism is in transmission connection with the translation base and used for driving the translation base to drive the scraper to reciprocate in the linear direction. And when a certain amount of sand is stored in the sand paving hopper, the driving mechanism drives the translation seat to drive the scraper to move back and forth in the sand paving hopper, so that the sand in the sand paving hopper is scraped to be flat by utilizing scraping teeth of the scraper. Therefore, the sand scraping device is used for automatically scraping the sand in the sand paving hopper in the sand paving process, the whole sand scraping process does not need to stop working of the sand mold 3D printing equipment, a manual observation space and a manual sand scraping operation space do not need to be reserved, and the improvement of the working efficiency of the sand mold 3D printing equipment and the effective utilization rate of the equipment space is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a sand scraping device and sand mold 3D printing equipment. Background Art

[0002] With the popularization of sand 3D printer technology, more and more industries have begun to use sand 3D printers. Sand 3D printing (3DP) is a type of rapid prototyping technology. It is a technology that uses digital model files as the basis and uses bondable materials such as silica sand, artificial sand, ceramic powder, etc. to construct objects by printing layer by layer.

[0003] In traditional sand mold 3D printing equipment, the sand laying hopper does not have a corresponding sand scraping device. Manual operation is often used to scrape the sand during the sand laying process. During the use of the equipment, it is necessary to manually observe whether there is an uneven amount of sand in the sand laying hopper. On the one hand, manual scraping requires the equipment to stop working, affecting the working efficiency of the equipment; on the other hand, manual observation space needs to be reserved for the sand laying hopper to facilitate manual observation of whether there is an uneven amount of sand in the sand laying hopper. Manual scraping operations also require a certain amount of operating space to be reserved, which has high requirements on the equipment size and space, and cannot maximize the space utilization. Utility Model Content

[0004] Based on this, it is necessary to provide a sand scraping device and sand mold 3D printing equipment that can automatically scrape the sand in the sand hopper and improve the effective utilization of the equipment space.

[0005] A sand scraping device is used to scrape sand in a sand hopper in a sand mold 3D printing device, and the sand scraping device comprises:

[0006] Support structure;

[0007] A translation seat, slidably mounted on the support structure along a linear direction;

[0008] A scraper, mounted on the translation seat and configured so that at least a portion of the scraper is located in the sand paving bucket;

[0009] The driving mechanism is connected to the translation seat in transmission, and is used to drive the translation seat to drive the scraper to move back and forth in a straight line direction.

[0010] In one embodiment, the support structure includes a first support frame, a second support frame and a support cross plate; the first support frame and the second support frame are arranged at intervals along a straight line direction; the two ends of the support cross plate are respectively fixedly connected to the first support frame and the second support frame; the translation seat is slidably installed on the support cross plate along the spacing direction of the first support frame and the second support frame.

[0011] In one embodiment, it further includes a guiding component; the guiding component includes a guide rail and a slider slidably mounted on the guide rail; the guide rail is mounted on the supporting structure; the translation seat is mounted on the slider.

[0012] In one embodiment, it further includes two dust covers; the two dust covers are spaced along the translation direction of the translation seat and cover the supporting structure, with the guide rail located inside the dust covers; the translation seat is located between the two dust covers and is fixedly connected to one end of each of the two dust covers respectively; one end of each dust cover away from the translation seat is fixed to the supporting structure; each dust cover is configured to be telescopic in the translation direction of the translation seat.

[0013] In one embodiment, the scraper includes a tool holder and two scraping teeth; the tool holder is detachably mounted on the translation seat; the two scraping teeth are spaced along the translation direction of the translation seat; in the translation direction of the translation seat, the translation seat is located between the two scraping teeth and is spaced from each scraping tooth.

[0014] In one embodiment, it further includes a belt drive component; the belt drive component includes two mounting seats, two synchronous pulleys respectively rotatably mounted on the two mounting seats, a synchronous belt tensioned on the two synchronous pulleys, and a fixing seat detachably fixed to the synchronous belt; the two mounting seats are spaced and fixed on the supporting structure along the translation direction of the translation seat; the translation seat is detachably mounted on the fixing seat; the driving mechanism is a driving motor; the output shaft of the driving motor is in transmission connection with the rotating shaft of one of the synchronous pulleys.

[0015] In one embodiment, there are two fixing seats; the two fixing seats are spaced and fixed on the synchronous belt along the translation direction of the translation seat; a forward screw hole and a reverse screw hole are respectively formed on the two fixing seats; the belt drive component further includes a tensioning screw; both ends of the tensioning screw have a forward thread and a reverse thread respectively; the forward thread and the reverse thread are respectively screwed into the forward screw hole and the reverse screw hole; at least two elongated through holes are formed on the translation seat, and the two fixing seats are respectively detachably connected to at least two of the elongated through holes through connecting pieces.

[0016] In one embodiment, the fixing seat includes an upper fixing block and a lower fixing block; the upper fixing block and the lower fixing block are detachably connected to the upper and lower sides of the synchronous belt to fix the fixing seat on the synchronous belt; the forward screw hole and the reverse screw hole are respectively formed on the opposite surfaces of the two upper fixing blocks; the two lower fixing blocks are respectively detachably connected to at least two of the elongated through holes through the connecting pieces.

[0017] In one embodiment, it further includes a first position detector, a second position detector and a controller; the first position detector and the second position detector are arranged on the support structure at intervals along the translation direction of the translation seat, and are respectively used to detect two limit position information when the translation seat moves; the controller is respectively connected to the first position detector, the second position detector and the driving mechanism, and is used to control the driving mechanism to stop and reverse start when receiving the limit position information sent by the first position detector or the second position detector.

[0018] A sand mold 3D printing device includes a sand spreading hopper and the sand scraping device as described above; the sand spreading hopper is installed on the support structure, and at least part of the scraper is located in the sand spreading hopper.

[0019] For the above-mentioned sand scraping device and the sand mold 3D printing device, when a certain amount of sand material is stored in the sand spreading hopper, the driving mechanism drives the translation seat to drive the scraper to move back and forth in the sand spreading hopper, so as to use the scraping teeth of the scraper to level the sand material in the sand spreading hopper. Therefore, the above-mentioned sand scraping device is used to automatically level the sand in the sand spreading hopper during the sand spreading process. The entire sand scraping process does not require the sand mold 3D printing device to stop working, nor does it need to reserve space for manual observation and manual sand scraping operation, which helps to improve the working efficiency of the sand mold 3D printing device and the effective utilization rate of the device space. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the sand scraping device in a preferred embodiment of the present invention;

[0021] Figure 2 is Figure 1 an exploded view of the sand scraping device shown;

[0022] Figure 3 is Figure 1 an installation state diagram between the scraper and the translation seat in the sand scraping device shown.

[0023] Label description: 100, sand scraping device; 110, support structure; 111, first support frame; 112, second support frame; 113, support cross plate; 120, translation seat; 121, long strip through hole; 130, scraper; 131, tool holder; 132, scraping teeth; 140, driving mechanism; 150, guiding component; 151, guide rail; 152, slider; 160, dust cover; 170, belt drive component; 171, mounting seat; 172, synchronous pulley; 173, synchronous belt; 174, fixing seat; 1741, upper fixing block; 1742, lower fixing block; 175, tensioning screw; 181, first position detector; 182, second position detector; 200, sand spreading hopper. Detailed implementation mode

[0024] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant attached drawings. The preferred embodiments of the present utility model are shown in the attached drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0026] When describing the positional relationship, unless otherwise specified, when an element is referred to as being "on" another element, it can be directly on the other element or there can also be an intermediate element. It can also be understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements, or there can also be one or more intermediate elements.

[0027] In the case of using "including", "having", and "comprising" described herein, unless a clear limiting term is used, such as "only", "consisting of", etc., another component can also be added. Unless otherwise mentioned, terms in the singular form can include the plural form and should not be understood as having a quantity of one.

[0028] In addition, the attached drawings are not drawn to a scale of 1:1, and the relative sizes of the components are only drawn by way of example in the attached drawings and not necessarily in actual proportion.

[0029] The present utility model provides a sand scraping device and a sand mold 3D printing device. Among them, the sand mold 3D printing device includes a sand spreading hopper and a sand scraping device. The sand scraping device is used to automatically scrape the sand material in the sand spreading hopper during the sand spreading process of the sand mold 3D printing device.

[0030] Figure 1 Shown is the structure of the sand scraping device in an embodiment of the present utility model. For the convenience of description, the attached drawings only show the structures related to the embodiments of the present utility model.

[0031] Please refer to Figure 1 and Figure 2 , the sand scraping device 100 in the preferred embodiment of the present utility model includes a support structure 110, a translation seat 120, a scraper 130, and a driving mechanism 140.

[0032] The translation seat 120 is slidably mounted on the support structure 110 in a linear direction. Among them, the support structure 110 can be a support structure 110 independent of the fuselage of the sand mold 3D printing device, or a partial structure of the fuselage of the sand mold 3D printing device, or even a support structure 110 fixed on the fuselage of the sand mold 3D printing device for fixing the internal components of the sand spreading hopper 200.

[0033] The scraping blade 130 is mounted on the translation seat 120 and is configured such that at least a part of the scraping blade 130 is located within the sand spreading hopper 200. In the sand mold 3D printing device, both the sand spreading hopper 200 and the translation seat 120 are mounted on the support structure 110, and it is ensured that at least a part of the scraping blade 130 is located within the sand spreading hopper 200.

[0034] The driving mechanism 140 is in transmission connection with the translation seat 120 and is used to drive the translation seat 120 to drive the scraping blade 130 to reciprocate in a linear direction. Thus, under the driving action of the driving mechanism 140, the translation seat 120 drives the scraping blade 130 to perform linear reciprocating movement.

[0035] When a certain amount of sand material is stored in the sand spreading hopper 200, the driving mechanism 140 drives the translation seat 120 to drive the scraping blade 130 to move back and forth within the sand spreading hopper 200, so as to use the scraping teeth 132 of the scraping blade 130 to level the sand material in the sand spreading hopper 200. Therefore, the above-mentioned sand leveling device 100 is applied to the sand mold 3D printing device to automatically level the sand within the sand spreading hopper 200 during the sand spreading process. The entire sand leveling process does not require the sand mold 3D printing device to stop working, nor does it need to reserve space for manual observation and manual sand scraping operation, which helps to improve the working efficiency of the sand mold 3D printing device and the effective utilization rate of the device space.

[0036] In some embodiments, the support structure 110 includes a first support frame 111, a second support frame 112, and a support cross plate 113. The first support frame 111 and the second support frame 112 are arranged at intervals in a linear direction. Both ends of the support cross plate 113 are fixedly connected to the first support frame 111 and the second support frame 112 respectively. The translation seat 120 is slidably mounted on the support cross plate 113 along the interval direction between the first support frame 111 and the second support frame 112. Specifically, in the sand mold 3D printing device, both ends of the sand spreading hopper 200 are connected to the first support frame 111 and the second support frame 112 respectively, and the translation seat 120 is mounted on the support cross plate 113. Of course, in other embodiments, the laying hopper 200 can also be mounted on the support cross plate 113.

[0037] Thus, the first support frame 111, the second support frame 112, and the support cross plate 113 form a gantry structure. The first support frame 111 and the second support frame 112 are used to be fixed to the fuselage of the sand mold 3D printing device to facilitate the installation of components such as the sand spreading hopper 200 and the translation seat 120.

[0038] In some embodiments, the leveling sand device 100 further includes a guiding assembly 150. The guiding assembly 150 includes a guide rail 151 and a slider 152 slidably mounted on the guide rail 151. The guide rail 151 is mounted on the support structure 110. The translation seat 120 is mounted on the slider 152. In this way, the extending direction of the guide rail 151 is the translation direction of the translation seat 120, and the slider 152 and the guide rail 151 cooperate to correct the translation path of the translation seat 120, so as to improve the leveling sand accuracy of the scraper 130.

[0039] Further, in some embodiments, the leveling sand device 100 further includes two dust covers 160. The two dust covers 160 are spaced apart along the translation direction of the translation seat 120 and cover the support structure 110, and the guide rail 151 is located inside the dust covers 160. The translation seat 120 is located between the two dust covers 160 and is fixedly connected to one end of each of the two dust covers 160 respectively. One end of each dust cover 160 away from the translation seat 120 is fixed to the support structure 110. Each dust cover 160 is configured to be telescopic in the translation direction of the translation seat 120.

[0040] Among them, the dust cover 160 can be a foldable structure such as an accordion structure or a corrugated pipe structure, or an articulated boom telescopic structure, etc., as long as it can elongate and shorten along with the translation of the translation seat 120 in the translation direction of the translation seat 120. The setting of the dust cover 160 can seal and dust-proof the guiding assembly 150, so as to prevent dust, particulate matter, dust, etc. generated during the sand laying work in the sand laying hopper 200 from invading the guiding assembly 150 and affecting the guiding function and guiding accuracy of the guiding assembly 150, which is beneficial to improving the use reliability.

[0041] Specifically, both ends of each dust cover 160 are respectively fixed to one end of the translation seat 120 and one end of the support cross plate 113. In order to ensure the sealing performance of the dust cover 160 for the guiding assembly 150, the dust cover 160 covers the support cross plate 113 and is in sliding contact with the support cross plate 113.

[0042] Please refer to Figure 3 , in some embodiments, the scraper 130 includes a tool holder 131 and two scraping teeth 132. The tool holder 131 is detachably mounted on the translation seat 120. The two scraping teeth 132 are arranged at intervals along the translation direction of the translation seat 120. In the translation direction of the translation seat 120, the translation seat 120 is located between the two scraping teeth 132, and the translation seat 120 is spaced from each scraping tooth 132. In the sand mold 3D printing device, at least a part of each scraping tooth 132 is located inside the sand laying hopper 200.

[0043] Thus, after the translation base 120 moves to the end of the support structure 110 in place, a scraping tooth 132 on the scraping blade 130 near the end close to the support structure 110 moves as close as possible to the inner wall of the sand spreading hopper 200, avoiding dead angles or incomplete scraping when the scraping blade 130 levels the sand in the sand spreading hopper 200, improving the sand leveling effect and use reliability of the sand leveling device 100.

[0044] In some embodiments, the sand leveling device 100 further includes a belt drive assembly 170. The belt drive assembly 170 includes two mounting seats 171, two synchronous pulleys 172 rotatably mounted on the two mounting seats 171 respectively, a synchronous belt 173 tensioned on the two synchronous pulleys 172, and a fixing seat 174 detachably fixed on the synchronous belt 173. The two mounting seats 171 are fixedly spaced on the support structure 110 along the translation direction of the translation base 120. The translation base 120 is detachably mounted on the fixing seat 174. The driving mechanism 140 is a driving motor. The output shaft of the driving motor is in transmission connection with the rotating shaft of one of the synchronous pulleys 172.

[0045] The belt drive assembly 170 has the advantages of simple structure, stable transmission and buffering and vibration absorption. Therefore, using the belt drive assembly 170 between the driving motor and the translation base 120 can not only ensure a more stable sand leveling process of the scraping blade 130, but also simplify the structure of the sand leveling device 100, which is beneficial to ensuring a higher space utilization rate of the sand mold 3D printing equipment.

[0046] Specifically, one end of the dust cover 160 away from the translation base 120 is fixedly connected to the mounting seat 171 to fix the dust cover 160 on the support structure 110.

[0047] In other embodiments, the belt drive assembly 170 can also be replaced by transmission structures such as a chain drive assembly and a lead screw drive assembly.

[0048] Further, in some embodiments, there are two fixing seats 174. The two fixing seats 174 are fixedly spaced on the synchronous belt 173 along the translation direction of the translation base 120. Positive threaded holes (not shown in the figure) and reverse threaded holes (not shown in the figure) are respectively formed on the two fixing seats 174. The belt drive assembly 170 further includes a tensioning screw 175. Both ends of the tensioning screw 175 have positive threads and reverse threads. The positive threads and reverse threads are respectively screwed into the positive threaded holes and reverse threaded holes. At least two elongated through holes 121 are formed on the translation base 120, and the two fixing seats 174 are respectively detachably connected to at least two elongated through holes 121 through connecting members (not shown in the figure).

[0049] During long-term use, if the synchronous belt 173 becomes loose, the staff can tighten the synchronous belt 173 by rotating the tensioning screw 175 to shorten the distance between the two fixed seats 174, thereby adjusting the tension of the synchronous belt 173. At the same time, the installation position of the connecting member in the long through hole 121 is adjusted, making it more convenient for the scraping and leveling sand device 100.

[0050] Furthermore, in some embodiments, the fixed seat 174 includes an upper fixed block 1741 and a lower fixed block 1742. The upper fixed block 1741 and the lower fixed block 1742 are detachably connected to the upper and lower sides of the synchronous belt 173 to fix the fixed seat 174 on the synchronous belt 173. Opposite surfaces of the two upper fixed blocks 1741 are respectively provided with a forward threaded hole and a reverse threaded hole. Both of the two lower fixed blocks 1742 are detachably connected to at least two long through holes 121 through connecting members respectively.

[0051] The upper fixed block 1741 and the lower fixed block 1742 are respectively placed on the upper side and the lower side of the synchronous belt 173 and detachably connected to clamp and fix the synchronous belt 173 between the upper fixed block 1741 and the lower fixed block 1742, so as to realize the fixed connection of the fixed seat 174 on the synchronous belt 173, making the disassembly, installation and replacement of the fixed seat 174 on the synchronous belt 173 more convenient.

[0052] In some embodiments, the scraping and leveling sand device 100 further includes a first position detection member 181, a second position detection member 182 and a controller (not shown in the figure). The first position detection member 181 and the second position detection member 182 are arranged on the support structure 110 at intervals along the translation direction of the translation seat 120, and are respectively used to detect two limit position information when the translation seat 120 moves. The controller is respectively connected to the first position detection member 181, the second position detection member 182 and the driving mechanism 140, and is used to control the driving mechanism 140 to stop and reverse start when receiving the limit position information sent by the first position detection member 181 or the second position detection member 182.

[0053] Among them, the first position detection member 181 and the second position detection member 182 can be a position sensor, a travel switch, a proximity switch, etc. The controller can be a motor controller provided on the driving motor, or can also be that of the sand mold 3D printing device. During actual use, when the first position detection member 181 or the second position detection member 182 collects the limit position information of the translation seat 120, it means that the translation seat 120 has moved to the limit position of the stroke. At this time, the first position detection member 181 or the second position detection member 182 will send a trigger signal to the controller, so that the controller controls the driving motor to first stop working and then reverse start, so as to realize the automatic reversing when the translation seat 120 reciprocates on the support structure 110.

[0054] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0055] The above-described embodiments merely represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several variations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A sand leveling device is applied to level the sand material in the sand spreading hopper of a sand mold 3D printing device, and is characterized in that, The leveling sand scraping device includes: A support structure; A translation seat, slidably mounted on the support structure in a linear direction; A scraping knife, mounted on the translation seat and configured such that at least a part of the scraping knife is located within the sand spreading hopper; A driving mechanism, in transmission connection with the translation seat and used to drive the translation seat to drive the scraping knife to reciprocate in a linear direction.

2. The scraping and leveling sand device according to claim 1, characterized in that, The support structure includes a first support frame, a second support frame and a support cross plate; the first support frame and the second support frame are arranged at intervals in a linear direction; both ends of the support cross plate are fixedly connected to the first support frame and the second support frame respectively; the translation seat is slidably mounted on the support cross plate along the interval direction between the first support frame and the second support frame.

3. The scraping and leveling sand device according to claim 1, wherein It further includes a guiding component; the guiding component includes a guide rail and a slider slidably mounted on the guide rail; the guide rail is mounted on the support structure; the translation seat is mounted on the slider.

4. The leveling sand device according to claim 3, characterized in that, It further includes two dust covers; the two dust covers are arranged at intervals along the translation direction of the translation seat to cover the support structure, and the guide rail is located within the dust covers; the translation seat is located between the two dust covers and is fixedly connected to one end of each of the two dust covers respectively; one end of each dust cover away from the translation seat is fixed to the support structure; each dust cover is configured to be telescopic in the translation direction of the translation seat.

5. The scraping and leveling sand device according to claim 1, wherein, The scraping knife includes a knife seat and two scraping teeth; the knife seat is detachably mounted on the translation seat; the two scraping teeth are arranged at intervals along the translation direction of the translation seat; in the translation direction of the translation seat, the translation seat is located between the two scraping teeth and is spaced from each scraping tooth.

6. The leveling sand device according to claim 1, characterized in that It further includes a belt transmission component; the belt transmission component includes two mounting seats, two synchronous pulleys respectively rotatably mounted on the two mounting seats, a synchronous belt tensioned on the two synchronous pulleys, and a fixing seat detachably fixed to the synchronous belt; the two mounting seats are fixedly arranged at intervals along the translation direction of the translation seat on the support structure; the translation seat is detachably mounted on the fixing seat; the driving mechanism is a driving motor; the output shaft of the driving motor is in transmission connection with the rotating shaft of one of the synchronous pulleys.

7. The leveling sand device according to claim 6, wherein, There are two fixing seats; the two fixing seats are fixedly arranged at intervals along the translation direction of the translation seat on the synchronous belt; a forward screw hole and a reverse screw hole are respectively formed on the two fixing seats; the belt transmission component further includes a tensioning screw; both ends of the tensioning screw respectively have a forward thread and a reverse thread; the forward thread and the reverse thread are respectively screwed into the forward screw hole and the reverse screw hole; at least two long strip through holes are formed on the translation seat, and both of the two fixing seats are detachably connected to at least two of the long strip through holes respectively through connecting pieces.

8. The screeding sand device according to claim 7, characterized in that, The fixing base includes an upper fixing block and a lower fixing block; the upper fixing block and the lower fixing block are detachably connected to the upper and lower sides of the synchronous belt respectively to fix the fixing base on the synchronous belt; the opposite surfaces of the two upper fixing blocks are respectively provided with the forward screw holes and the reverse screw holes; both of the two lower fixing blocks are detachably connected to at least two of the long strip through holes respectively through the connecting pieces.

9. The leveling sand device according to claim 1, wherein It further includes a first position detector, a second position detector and a controller; the first position detector and the second position detector are arranged on the support structure at intervals along the translation direction of the translation base and are respectively used for detecting two limit position information when the translation base moves; the controller is respectively connected to the first position detector, the second position detector and the driving mechanism and is used for controlling the driving mechanism to stop and reverse start when receiving the limit position information sent by the first position detector or the second position detector.

10. A sand mold 3D printing device, characterized in that, It includes a sand spreading hopper and the leveling sand device according to any one of claims 1 to 9; the sand spreading hopper is installed on the support structure and at least part of the scraper is located in the sand spreading hopper.

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