Discharging hopper and powder spreading device

Abstract

The utility model discloses a blanking hopper and a powder spreading device, and belongs to the technical field of loose powder spreading. The discharging hopper comprises a front plate, a rear plate and two side plates, the discharging hopper is provided with a feeding port and a discharging port, the front plate is composed of a positioning plate and a sliding plate, the positioning plate and the sliding plate are arranged in parallel and staggered in the discharging direction, and the sliding plate is close to the lower portion; the positioning plate is pivoted between the two side plates and can be deflected and positioned around a pivot; the sliding plate is movably connected to the positioning plate and can slide back and forth and be positioned in the discharging direction. The inclination angle and the size of the discharging port can be changed, so that the powder discharging device can be matched with powder with different densities and flowability, it is guaranteed that the powder smoothly falls down, the situation that the powder is accumulated in a mold is avoided, the bottom edge of the discharging hopper serves as a scraper, the powder can be scraped flatly in real time in the forward moving process of the discharging hopper, and powder accumulation is prevented; and therefore, the powder can be uniformly paved in the mold.

Description

TECHNICAL FIELD

[0001] The utility model relates to loose powder laying technology field especially, relates to a kind of hopper and powder laying device. BACKGROUND

[0002] Powder molding is applied in more fields, such as metal die casting, ceramic pressing and the like, and good results can be achieved. However, in the aspect of powder molding of composite materials, material characteristics such as specific surface area, repose angle and density of the powder are quite different from traditional materials, leading to difficulties in processing the powder using traditional equipment and processes. For example, in the powder molding process of graphite composite bipolar plates in the field of hydrogen fuel cells, the main raw materials are carbon-based composite material powders such as graphite and graphene. These powders generally have characteristics such as small bulk density, large repose angle and poor flowability. Traditional laying methods generally adopt the steps of material falling and then scraping. However, due to the above-mentioned characteristics of the powder, the density of the powder in different areas is not uniform, especially during the scraping process, the powder pile will accumulate in front of the scraping direction, eventually causing the density of the powder in the scraping direction to become larger and larger. Even if multiple small piles are formed by dispersing the material, this phenomenon still exists.

[0003] In addition, due to the characteristics of the powder such as small bulk density, large repose angle and poor flowability, material falling is also troublesome, i.e., material jamming occurs. This problem can be solved by using a vibrator, but this method is not satisfactory when facing a large hopper.

[0004] Therefore, there is a need to propose a new technical solution to solve the above technical problems. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a kind of hopper and powder laying device, to solve the problems of material jamming and uneven powder laying in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical means:

[0007] The first aspect of the utility model provides a kind of hopper, including front plate, back plate and two side plates, the two side plates are arranged relatively parallel, and the front plate and the back plate are arranged relatively inclined to form a hopper shape, the hopper has a feeding port and a discharge port;The front plate is composed of a positioning plate and a sliding plate, the positioning plate and the sliding plate are arranged parallelly, and they are mutually staggered in the direction of discharging, and the sliding plate is lower;

[0008] The positioning plate is pivoted between the two side plates and can be pivoted and positioned around the pivot axis;

[0009] The sliding plate is movably connected to the positioning plate and can slide back and forth and be positioned along the direction of discharging.

[0010] As a further improvement, the bottom edge of the positioning plate is pivoted between the two side plates, the top edge of the positioning plate extends to the two sides respectively and is vertically rolled to form two connecting pieces; the two side plates are respectively provided with a circular arc groove corresponding to the two connecting pieces, and the circular arc groove coincides with the swing track of the connecting piece;

[0011] Each circular arc groove is provided with a bolt, and the bolt penetrates the connecting piece and the circular arc groove to realize the positioning of the positioning plate.

[0012] As a further improvement, the bottom edge of the positioning plate is rolled to form a winding drum to one side, a pivot is arranged in the winding drum, and the two ends of the pivot are inserted into the two side plates.

[0013] As a further improvement, a turnover motor is further included, and an output shaft of the turnover motor is connected to the positioning plate to drive the positioning plate to turn around the shaft.

[0014] As a further improvement, the two side plates and the rear plate are integrally formed, the side plate has an inverted triangular shape, and the rear plate has a rectangular shape.

[0015] The utility model discloses a second aspect provides a powder spreading device, including:

[0016] Die, with flat top end face;

[0017] The blanking hopper as described above, the bottom edge of the blanking hopper is flush with the top end face of the die;

[0018] The conveying mechanism connected to the blanking hopper is used to drive the blanking hopper to move along the first direction of the die;

[0019] The driving mechanism connected to the conveying mechanism is used to drive the conveying mechanism to operate.

[0020] As a further improvement, the conveying mechanism includes a guide rail and a sliding block;

[0021] The guide rail is parallelly laid on the two sides of the die, the sliding block is slidingly connected to the guide rail, and the sliding block is connected to the blanking hopper.

[0022] As a further improvement, the driving mechanism includes a motor, a conveyor belt and a sliding roller;

[0023] The motor is connected to the rotating shaft of the sliding roller to drive the sliding roller to rotate;

[0024] The conveyor belt is arranged around the periphery of the sliding roller, and the conveyor belt is fixedly connected to the sliding block.

[0025] As a further improvement, a vibrator is further included and mounted on the outer wall of the blanking hopper.

[0026] As a further improvement, two strip-shaped grooves are formed on the sliding plate, the length direction of the strip-shaped grooves is consistent with the discharging direction; a positioning bolt passes through the positioning plate and the strip-shaped grooves, thereby positioning the sliding plate on the positioning plate.

[0027] Compared with the prior art, the powder discharging device has the following technical effects:

[0028] The powder discharging hopper comprises a front plate, a rear plate and two side plates, the two side plates and the rear plate are fixed structures, the front plate is a movable structure, specifically: the front plate is composed of a positioning plate and a sliding plate, the two are arranged in parallel and are mutually staggered in the discharging direction, the positioning plate is pivotally connected between the two side plates and can be pivoted and positioned, so that the inclination angle of the front plate can be changed; the sliding plate is movably connected to the positioning plate and can slide back and forth along the discharging direction and be positioned, so that the size of the discharge opening can be changed, and the change of the inclination angle of the front plate changes the repose angle of the powder, and the flexible adjustment of the size of the discharge opening can ensure that the powder falls smoothly and avoids the phenomenon of powder jamming when the powder discharging hopper faces different characteristics of the powder.

[0029] The powder discharging hopper comprises a front plate, a rear plate and two side plates, the two side plates and the rear plate are fixed structures, the front plate is a movable structure, specifically: the front plate is composed of a positioning plate and a sliding plate, the two are arranged in parallel and are mutually staggered in the discharging direction, the positioning plate is pivotally connected between the two side plates and can be pivoted and positioned, so that the inclination angle of the front plate can be changed; the sliding plate is movably connected to the positioning plate and can slide back and forth along the discharging direction and be positioned, so that the size of the discharge opening can be changed, and the change of the inclination angle of the front plate changes the repose angle of the powder, and the flexible adjustment of the size of the discharge opening can ensure that the powder falls smoothly and avoids the phenomenon of powder jamming when the powder discharging hopper faces different characteristics of the powder. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0031] Figure 1 Fig. 1 shows a structural schematic view of a powder discharging device of the present application;

[0032] Figure 2 Fig. 2 shows a side view of Figure 1 Fig. 3 shows a side view of

[0033] Figure 3 Fig. 4 shows a perspective structural schematic view of a powder discharging hopper of the present application;

[0034] Figure 4 Fig. 5 shows a perspective structural schematic view of another view of the powder discharging hopper of the present application;

[0035] Figure 5 Fig. 6 shows a cross-sectional view of the powder discharging hopper of the present application.

[0036] Main element symbol explanation:

[0037] Powder laying device-100; mold-10; top surface-11; hopper-20; front plate-21; rear plate-22; side plate-23; positioning plate-24; reel-241; pivot-242; sliding plate-25; strip-shaped groove-251; connecting piece-26; circular arc groove-27; bolt-28; positioning bolt-29; feeding port-A; discharging port-B; guide rail-31; sliding block-32; horizontal plate-321; vertical plate-322. DETAILED DESCRIPTION

[0038] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0039] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict. The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, in which the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout.

[0040] EMBODIMENT

[0041] Please refer to Figure 1 and Figure 2 The present embodiment provides a powder laying device 100, which comprises a mold 10, a hopper 20, a conveying mechanism and a driving mechanism. It should be noted that the present embodiment is specifically for the scenario of discharging and laying composite graphite material.

[0042] The mold 10 has a cavity for accommodating powder and then performing subsequent mold pressing process, and the mold 10 also has a flat top surface 11. The hopper 20 is located above the mold 10, and the bottom edge of the hopper 20 is flush with the top surface 11 of the mold 10, so that the bottom edge of the hopper 20 can act as a scraper to flatten the falling powder. The conveying mechanism is connected to the hopper 20 for moving the hopper 20 along the length direction of the mold 10, and the driving mechanism is connected to the conveying mechanism for driving the conveying mechanism to operate.

[0043] Please refer to Figures 3-5, specifically, in the embodiment, the lower hopper 20 comprises a front plate 21, a back plate 22 and two side plates 23, the two side plates 23 are arranged in parallel, the front plate 21 and the back plate 22 are arranged in an inclined manner to form a hopper shape, the lower hopper 20 has an inlet A and an outlet B. Specifically, the two side plates 23 and the back plate 22 are arranged in a fixed structure and are integrally formed, the side plate 23 has an inverted triangular shape and the back plate 22 is rectangular; the front plate 21 is arranged in a movable structure and is composed of a positioning plate 24 and a sliding plate 25, the positioning plate 24 and the sliding plate 25 are arranged in parallel, are staggered with each other in the downward direction and the sliding plate 25 is located below; the positioning plate 24 is pivotally connected between the two side plates 23 and can be pivoted and positioned about the pivot; the sliding plate 25 is movably connected to the positioning plate 24 and can be slid and positioned back and forth along the downward direction. The positioning plate 24 and the sliding plate 25 are both rectangular plates.

[0044] In the embodiment, the bottom edge of the positioning plate 24 is pivotally connected between the two side plates 23, the top edge of the positioning plate 24 extends to both sides and is vertically rolled to form two connecting pieces 26; the two side plates 23 are respectively provided with a circular arc groove 27 corresponding to the two connecting pieces 26, the circular arc groove 27 coincides with the swing track of the connecting piece 26; each circular arc groove 27 is provided with a bolt 28 corresponding thereto, the bolt 28 penetrates the connecting piece 26 and the circular arc groove 27 to realize the positioning of the positioning plate 24.

[0045] Further, the bottom edge of the positioning plate 24 is rolled to one side to form a winding drum 241, a pivot 242 is arranged in the winding drum 241, the two ends of the pivot 242 are inserted into the two side plates 23, so as to realize the purpose of pivotally connecting the positioning plate 24 between the two side plates 23.

[0046] In use, the bolt 28 is loosened, the positioning plate 24 is adjusted to a suitable inclined position, the bolt 28 is tightened again, the connecting piece 26 is locked at a certain position of the circular arc groove 27, and then the positioning plate 24 is positioned at the inclined position.

[0047] In the embodiment, the sliding plate 25 is located above the positioning plate 24, i.e. the inner side of the lower hopper 20. Two strip-shaped grooves 251 are arranged above the sliding plate 25, the length direction of the strip-shaped groove 251 is consistent with the downward direction; a positioning hole (not marked in the figure) is arranged below the positioning plate 24, a positioning bolt 29 penetrates the positioning hole and the strip-shaped groove 251, so as to realize the purpose of sliding and positioning the sliding plate 25 on the positioning plate 24.

[0048] In use, the positioning bolt 29 is loosened, the position of the sliding plate 25 relative to the positioning plate 24 can be adjusted along the length direction of the strip-shaped groove 251, such as sliding downward or upward to a suitable position, the positioning bolt 29 is tightened again, the sliding plate 25 is locked at a certain position of the positioning plate 24, and then the sliding and positioning of the sliding plate 25 are realized.

[0049] Please refer toFigure 5 Adjusting the inclination angle of the positioning plate 24 is actually adjusting the inclination angle of the front plate 21, and the change of the inclination angle of the front plate 21 brings the change of the repose angle (not marked in the figure) of the falling powder, specifically, the inclination angle is gentle, and the repose angle is small, and the inclination angle is steep, and the repose angle is large, and the specific inclination angle is determined according to the density and flowability of the loose powder, and generally, the steeper the inclination angle, the faster the falling speed of the powder. However, in the specific powder feeding and paving scene, it is not that the faster the falling speed of the powder is, the better, but the speed should be uniform and controllable, so the feeding hopper 20 of the embodiment further comprises a sliding plate 25 for controlling the size of the discharge port B, and the size of the discharge port B is changed by adjusting the extension amount of the sliding plate 25 relative to the positioning plate 24, so as to realize the coordinated control of the smoothness and speed of the falling powder together with the inclination angle adjustment of the front plate 21. The repose angle refers to the angle between the surface of the powder pile and the horizontal plane.

[0050] It should be noted that the front plate 21 composed of the positioning plate 24 and the sliding plate 25 has a bottom edge always spaced apart from the top end surface 11 of the mold 10 by a certain distance, and the bottom edge of the rear plate 22 is flush with the top end surface 11 of the mold 10, so that the powder can fall down and the rear plate 22 can realize the flattening function.

[0051] Specifically, in the embodiment, the conveying mechanism comprises guide rails 31 and sliding blocks 32; the guide rails 31 are provided in two parallel on both sides of the mold 10, and the sliding blocks 32 are provided in two corresponding, the sliding blocks 32 are in sliding connection with the guide rails 31, and the sliding blocks 32 are connected with the feeding hopper 20. Specifically, the sliding block 32 comprises a horizontal plate 321 and a vertical plate 322, one end of the horizontal plate 321 is connected with the side plate 23 of the feeding hopper 20, and the other end is connected with the vertical plate 322, wherein the bottom edge of the vertical plate 322 is vertically bent to one side to form an L shape, so as to hold the guide rail 31 inside. The sliding connection between the sliding block 32 and the guide rail 31 can adopt oil pressure, magnetic levitation, pulley and other structures, and any structure that can realize the relative sliding of the two can be used.

[0052] The driving mechanism (not shown) can adopt a combination of motor, sliding roller and conveying belt, the sliding roller is provided with at least one front and one rear, the conveying belt is wound around the outer periphery of the sliding roller, the motor output shaft is connected with one of the sliding rollers, and one place of the conveying belt is connected with the sliding block 32, so that the motor can drive the sliding block 32 to move back and forth along the guide rail 31. Of course, the driving mechanism is not limited to the above-mentioned combination structure, and other combination structures can also be used in other embodiments.

[0053] In summary, compared with the prior art, the utility model brings the following technical effects:

[0054] The utility model discloses a blanking hopper 20 includes front plate 21, back plate 22 and both side plates 23, both side plates 23 and back plate 22 are fixed structure, and front plate 21 is movable structure, specific: front plate 21 is composed by locating plate 24 and sliding plate 25, both parallelly arranged, and in the blanking direction, mutually staggered, locating plate 24 is pivoted between both side plates 23, and can pivot around pivot 242 and position, therefore can change the inclination of front plate 21, sliding plate 25 is movably connected in locating plate 24, and can slide and position along the blanking direction, and thus can change the size of discharge port B, the change of above-mentioned front plate 21 inclination brings the change of powder rest angle, and the flexible adjustment of cooperation discharge port B size can make blanking hopper 20 when facing different characteristic powder can ensure that powder falls smoothly, avoid the phenomenon of powder blockage.

[0055] The powder paving device 100 comprising the blanking hopper 20 can ensure that the powder falls smoothly and does not accumulate in the mold 10 through the cooperative control of the inclination and size of the discharge port B, because the bottom edge of the blanking hopper 20 acts as a scraper and can flatten the powder in real time during the forward movement of the blanking hopper 20, preventing powder accumulation and ensuring that the powder is evenly paved in the mold 10.

[0056] Other description

[0057] In other embodiments, a vibrator (not shown) can also be installed on the outer wall of the blanking hopper 20 to vibrate the blanking hopper 20 and the powder therein, further preventing material blockage and ensuring that the powder falls smoothly into the mold 10.

[0058] In other embodiments, the locating plate 24 of the blanking hopper 20 can also be set to an automatic overturning structure, such as a overturning motor (not shown) fixedly installed on the side plate 23, the output shaft of the overturning motor being in transmission connection with the pivot 242 of the locating plate 24, such as gear connection. In this case, the locating plate 24 is fixedly connected with the pivot 242, so that starting the overturning motor can drive the locating plate 24 to realize the function of pivoting around the shaft, thereby adjusting the inclination of the front plate 21.

[0059] In other embodiments, the bottom edge of the locating plate 24 protrudes to form a pivot column (not shown) on both sides, and the pivot column is arranged through the side plate 23, and the pivot column forms the pivot 242 of the locating plate 24, thereby pivoting the locating plate 24 between the two side plates 23.

[0060] In other embodiments, the sliding plate 25 can also be arranged below the locating plate 24, i.e. on the outside of the blanking hopper 20. In this way, the top edge of the sliding plate 25 does not block the powder in the blanking hopper 20, which is more conducive to the falling of the powder.

[0061] Obviously, all the embodiments need not and cannot be exhausted here. The obvious changes or changes derived therefrom still belong to the protection range of the utility model.

Claims

1. A hopper, comprising a front plate, a back plate and two side plates, the two side plates being arranged in parallel to each other, and the front plate and the back plate being arranged in an inclined manner to each other to form a hopper shape, the hopper having an inlet and an outlet; characterized in that: The front plate is composed of a positioning plate and a sliding plate, the positioning plate and the sliding plate are arranged in parallel, and the two are staggered in the blanking direction, and the sliding plate is lower; The positioning plate is pivotally connected between the two side plates and can be pivoted and positioned about the pivot; The sliding plate is movably connected to the positioning plate and can slide back and forth and be positioned in the blanking direction.

2. The drop hopper of claim 1, wherein, The bottom edge of the positioning plate is pivotally connected between the two side plates, the top edge of the positioning plate extends to both sides and is vertically rolled to form two connecting pieces; the two side plates are respectively provided with an arc groove corresponding to the two connecting pieces, and the arc groove coincides with the swing track of the connecting piece; Each arc groove is provided with a bolt corresponding thereto, and the bolt penetrates the connecting piece and the arc groove to position the positioning plate.

3. The drop hopper of claim 2, wherein, The bottom edge of the positioning plate is rolled to one side to form a winding drum, a pivot is arranged in the winding drum, and the two ends of the pivot are inserted into the two side plates.

4. The drop hopper of claim 1, wherein, Further comprising a turnover motor, an output shaft of the turnover motor is connected to the positioning plate, and the turnover motor is used to drive the positioning plate to turn about the shaft.

5. The drop hopper of claim 1, wherein, The two side plates and the rear plate are integrally formed, the side plates have inverted triangular shapes, and the rear plate has a rectangular shape.

6. A powder spreading device, characterized by Comprise: A mold has a flat top surface; The bottom edge of the blanking hopper is flush with the top surface of the mold according to any one of claims 1-5; A conveying mechanism connected to the blanking hopper is used to drive the blanking hopper to move along the first direction of the mold; A driving mechanism connected to the conveying mechanism is used to drive the conveying mechanism to operate.

7. Powder spreading device according to claim 6, characterized in that The conveying mechanism comprises guide rails and sliding blocks; The guide rails are arranged in parallel on both sides of the mold, the sliding blocks are slidably connected to the guide rails, and the sliding blocks are connected to the blanking hopper.

8. Powder spreading device according to claim 7, characterized in that The driving mechanism comprises a motor, a conveyor belt and a sliding roller; The motor is connected to the rotating shaft of the sliding roller to drive the sliding roller to rotate; The conveyor belt is arranged around the periphery of the sliding roller, and the conveyor belt is fixedly connected to the sliding block.

9. The powder spreading device of claim 6, wherein Further comprising a vibrator mounted on the outer wall of the blanking hopper.

10. The powder spreading device of claim 6, wherein Two strip-shaped grooves are formed in the sliding plate, the length direction of the strip-shaped grooves is consistent with the blanking direction; a positioning bolt penetrates the positioning plate and the strip-shaped groove to position the sliding plate on the positioning plate.

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