Ceramic powder forming equipment and forming method

Abstract

The invention discloses ceramic powder forming equipment and a forming method.The ceramic powder forming equipment comprises forming rollers, a hopper and a pressure maintaining assembly, the forming rollers comprise the first forming roller and the second forming roller which are oppositely arranged in the vertical direction, the bottom end of the first forming roller is provided with a first compaction face, and the top end of the second forming roller is provided with a second compaction face; a compaction space is formed between the first compaction surface and the second compaction surface at an interval; the feeding end of the hopper extends to the compaction space; the pressure maintaining assembly comprises a supporting plate, a pressure maintaining plate and a pressure maintaining section, and the two ends of the pressure maintaining section are connected with the pressure maintaining plate and the first forming roller correspondingly; the pressure maintaining plate and the pressure maintaining section are both arranged opposite to the supporting plate and form a pressure maintaining interval, the pressure maintaining interval is connected with the compaction space, and the height of the pressure maintaining interval is the same as that of the compaction space. In the forming equipment, the pressure maintaining interval is connected with the compaction space, so that the green bricks can be subjected to continuous pressure after leaving the compaction space, and expansion of the green bricks due to internal stress release is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of brick making equipment, and in particular to a ceramic powder forming equipment and a forming method. Background Art

[0002] In the production process of ceramic bricks, the roller press is a key equipment. It applies pressure to the ceramic powder through the upper and lower pressing rollers driven by the oil cylinder to achieve roller pressing. However, ceramic materials have special physical properties during the pressing process, that is, the powder will undergo a compaction and solidification process after being pressed, but within a certain period of time, if the pressure is released or reduced, the bricks may expand due to the release of internal stress. If this expansion phenomenon is not properly controlled, it is very easy to cause cracks and fissures on the surface or inside of the bricks, seriously affecting product quality.

[0003] In order to avoid this problem, existing roller press equipment is usually equipped with a pressure-holding structure. The main function of the pressure-holding structure is to continue to apply a certain pressure to the brick after it leaves the upper pressing roller to prevent it from expanding due to the release of internal stress. However, the existing pressure-holding structure has a significant defect: due to the gap between the pressure-holding structure and the upper pressing roller, the brick will experience a stage where the pressure gradually decreases or even completely loses when it leaves the upper pressing roller and moves toward the pressure-holding structure. During this stage, the brick is prone to expansion, especially when it reaches the bottom of the pressure-holding structure. Due to the loss of direct pressure from the upper pressing roller, it may suddenly hit the side step of the pressure-holding structure, causing edge damage or internal stress concentration, thereby increasing the risk of cracks and fissures.

[0004] Therefore, there is an urgent need for a ceramic powder molding device and a molding method to overcome the above-mentioned defects. Summary of the invention

[0005] In order to overcome at least one of the defects of the above-mentioned prior art, one of the objects of the present invention is to provide a ceramic powder forming equipment, which can avoid the problem of expansion of the brick blank due to a sudden drop or loss of pressure after the brick blank leaves the compaction space and before entering the pressure holding interval by arranging a pressure maintaining section in the installation interval between the pressure holding plate and the first forming roller.

[0006] The second object of the present invention is to provide a ceramic powder molding method, which can adapt to the production needs of bricks of different thicknesses and widths, and the resulting brick structure is more stable, reducing the risk of internal stress concentration and cracks.

[0007] One of the technical solutions adopted by the present invention to solve the problem is:

[0008] A ceramic powder molding device, comprising:

[0009] A forming roller assembly, comprising a first forming roller and a second forming roller, wherein the first forming roller and the second forming roller are arranged opposite to each other in a vertical direction, the bottom end of the first forming roller has a first compacting surface, the top end of the second forming roller has a second compacting surface, and a compacting space is formed between the first compacting surface and the second compacting surface;

[0010] A feeding assembly comprises a hopper, wherein a feeding channel is provided in the hopper, wherein two ends of the feeding channel are a feeding end and a feeding end respectively, wherein the feeding end extends to the compacting space, and the feeding channel is used to transport powder material in a direction from the feeding end to the feeding end;

[0011] A pressure-maintaining assembly comprises a support plate, a pressure-maintaining plate and a pressure-maintaining section, wherein the pressure-maintaining plate is arranged adjacent to the first forming roller, and there is an installation gap between the end of the pressure-maintaining plate and the bottom end of the first forming roller in the horizontal direction, the pressure-maintaining section is arranged in the installation gap, and the two ends of the pressure-maintaining section are respectively connected to the pressure-maintaining plate and the first forming roller; the pressure-maintaining plate and the pressure-maintaining section are both arranged opposite to the support plate and form a pressure-maintaining gap, the pressure-maintaining gap is connected to the compaction space, and the height of the pressure-maintaining gap is the same as the height of the compaction space.

[0012] Furthermore, the pressure maintaining section is a pressure maintaining plate, and the pressure maintaining plate is detachably connected to the pressure maintaining plate; the lower surface of the pressure maintaining plate, the lower surface of the pressure maintaining plate and the first compacting surface are all arranged flush.

[0013] Furthermore, the pressure maintaining assembly includes a pressure belt, which is tightly attached to the lower surface of the pressure maintaining plate and the first compacting surface; the belt section of the pressure belt located at the installation interval is formed as the pressure maintaining section; and the pressure maintaining interval is formed between the pressure belt and the support plate.

[0014] Furthermore, the pressure-maintaining assembly includes a driven roller, the driven roller is arranged on one side of the first forming roller, and the pressure belt is arranged around the driven roller and the first forming roller.

[0015] Furthermore, the lower surface of the pressure maintaining plate is made of friction-reducing material.

[0016] Furthermore, the pressure-maintaining assembly includes a pressure-maintaining driving member, and the pressure-maintaining driving member is used to drive the pressure-maintaining plate to move up and down relative to the supporting plate.

[0017] Furthermore, the feeding channel includes a feeding section and a feeding section distributed from top to bottom, the feeding section is provided with a pushing screw; the feeding section is a curved section, and the lower end of the feeding section extends to the compacting space and forms the feeding end.

[0018] Furthermore, the hopper and the compaction space are connected by a discharge pipe, and the discharge pipe and the hopper are detachably connected; a discharge channel is provided in the discharge pipe, and the discharge channel connects the feeding channel and the compaction space; the height and width of the discharge channel are adjustable.

[0019] Furthermore, side guard strips are provided on both sides of the compaction space, and adjustment plates are provided on both sides of the discharge channel, and the side guard strips extend from the compaction space to the discharge channel and are connected to the adjustment plates; a discharge gap is formed between the adjustment plates on both sides of the discharge channel, wherein the adjustment plate on one side can move closer to or away from the adjustment plate on the other side, so that the width of the discharge gap can be adjusted.

[0020] The second technical solution adopted by the present invention to solve the problem is:

[0021] A ceramic powder molding method comprises the following steps:

[0022] Step S1: After the powder is filled into the hopper, the powder is accumulated at the feeding end of the feeding channel and transported to the feeding end of the feeding channel, and the powder forms a powder layer with uniform thickness at the feeding end;

[0023] Step S2: the powder layer at the feeding end enters the compacting space under the push of the powder in the feeding channel; in the compacting space, the first forming roller rotates and cooperates with the second forming roller to compact the powder layer to form a brick;

[0024] Step S3: The brick blank enters the pressure holding interval under the push of the first forming roller and the second forming roller, and the pressure holding plate, the pressure maintaining section and the support plate work together to limit the expansion of the brick blank; finally, the brick blank is output by the material receiving device.

[0025] In summary, the ceramic powder molding device and molding method provided by the present invention have the following technical effects:

[0026] 1) The ceramic powder forming equipment of the present application sets a pressure maintaining section at the installation interval between the pressure maintaining plate and the first forming roller, so that the pressure maintaining interval is connected to the compacting space. In this way, the brick blank can be subjected to continuous pressure after leaving the compacting space, thereby avoiding the problem of the brick blank expanding due to the sudden drop or loss of pressure after leaving the compacting space.

[0027] 2) The pressure section blocks the installation interval, which can prevent the brick from expanding and hitting the side steps of the pressure plate due to a sudden loss of pressure when it reaches the bottom of the pressure-maintaining structure, which greatly reduces the risk of damage to the edge of the brick and internal stress concentration. After the formed brick is subjected to pressure-maintaining treatment, the structure of the brick is more stable, reducing the risk of internal stress concentration and cracks, which helps to improve the overall quality and consistency of the product.

[0028] 3) The ceramic powder forming method of the present application can easily adapt to the production requirements of bricks of different thicknesses and widths, and the resulting brick structure is more stable, reducing the risk of internal stress concentration and cracks. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a ceramic powder forming device according to Embodiment 1 of the present invention;

[0030] Figure 2 It is a schematic diagram of the overall structure of a ceramic powder forming device according to the second embodiment of the present invention;

[0031] Figure 3 It is a structural schematic diagram of a feeding assembly according to an embodiment of the present invention;

[0032] Figure 4 It is a schematic structural diagram of the horizontal projection of the forming roller assembly according to an embodiment of the present invention.

[0033] The meanings of the reference numerals are as follows:

[0034] 1. Hopper; 10. Feeding channel; 11. Feeding end; 12. Feeding end; 14. Discharging channel; 15. Feeding section; 16. Feeding section; 17. Pushing screw; 2. Forming roller assembly; 21. First forming roller; 22. Second forming roller; 23. Compacting space; 31. Side bar; 32. Adjusting plate; 34. Support plate; 4. Material receiving device; 41. Pressure maintaining plate; 42. Installation interval; 43. Pressure maintaining plate; 44. Pressing belt; 45. Driven roller; 46. Pressure maintaining drive; 5. Brick blank. DETAILED DESCRIPTION

[0035] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0038] Embodiment 1

[0039] See also Figures 1 to 4 The present invention discloses a ceramic powder forming device, which includes a forming roller assembly 2, a feeding assembly and a pressure holding assembly. Figure 4 The forming roller assembly 2 includes a first forming roller 21 and a second forming roller 22, wherein the first forming roller 21 and the second forming roller 22 are arranged opposite to each other in the vertical direction, wherein the bottom end of the first forming roller 21 has a first compacting surface, the top end of the second forming roller 22 has a second compacting surface, and a compacting space 23 is formed between the first compacting surface and the second compacting surface. Figure 1 and Figure 2 The feeding assembly includes a hopper 1, a feeding channel 10 is provided in the hopper 1, and the two ends of the feeding channel 10 are respectively a feeding end 11 and a feeding end 12, wherein the feeding end 12 extends to the compacting space 23, and the feeding channel 10 is used to transport powder along the direction from the feeding end 11 to the feeding end 12.

[0040] The pressure-maintaining assembly includes a support plate 34, a pressure-maintaining plate 41 and a pressure-maintaining section. Specifically, the pressure-maintaining plate 41 is disposed adjacent to the first forming roller 21, and there is a mounting gap 42 between the end of the pressure-maintaining plate 41 and the bottom of the first forming roller 21 in the horizontal direction. The pressure-maintaining section is disposed in the mounting gap 42, and the two ends of the pressure-maintaining section are connected to the pressure-maintaining plate 41 and the first forming roller 21, respectively. Figure 1 and Figure 2 The pressure maintaining plate 41 and the pressure maintaining section are arranged opposite to the support plate 34 and form a pressure maintaining interval. The pressure maintaining interval is connected to the compacting space 23, and the height of the pressure maintaining interval is the same as the height of the compacting space 23.

[0041] Based on this structure, when using the ceramic powder forming equipment of the present application, when forming ceramic powder, the ceramic powder is first placed in the hopper 1 of the feeding assembly, and is transported from the feeding end 11 to the feeding end 12 by the feeding channel 10 in the hopper 1. After a powder layer is formed in the feeding channel 10, it is sent into the compacting space 23 by the feeding end 12. In the compacting space 23, the first forming roller 21 and the second forming roller 22 jointly apply pressure to the powder layer for roller forming. During the rolling process, the powder undergoes compaction and solidification to form a preliminary brick 5 structure.

[0042] Then, the green brick 5 leaves the compacting space 23 and enters the pressure holding interval under the push of the forming roller assembly 2. In the pressure holding interval, the pressure maintaining section and the pressure holding plate 41 apply continuous pressure to the green brick 5. Since the height of the pressure holding interval is the same as the height of the compacting space 23, the expansion of the green brick 5 can be limited to prevent it from expanding due to the release of internal stress. Then, the green brick 5 can be output from the pressure holding interval for subsequent processing and treatment.

[0043] It should be noted that in the conventional brick blank 5 forming equipment, the pressure-maintaining plate 41 and the first forming roller 21 are arranged adjacent to and spaced apart from each other, so that when the equipment is adjusted to adapt to the production of brick blanks 5 of different specifications, there will be no interference between the pressure-maintaining plate 41 and the first forming roller 21, and the pressure-maintaining plate 41 and the first forming roller 21 will not wear each other. However, this structural setting causes the brick blank 5 to experience a stage in which the pressure gradually decreases or even completely loses when it leaves the first forming roller 21 and moves toward the pressure-maintaining plate 41. At this stage, the brick blank 5 is prone to expansion, especially when it is about to enter the bottom of the pressure-maintaining plate 41. Due to the gradual loss of the direct pressure of the first forming roller 21, it may suddenly expand and hit the side step of the pressure-maintaining plate 41, thereby causing damage to the edge of the brick blank 5 or internal stress concentration, thereby increasing the risk of cracks and fissures.

[0044] Therefore, the present application sets a pressure maintaining section in the installation interval 42 between the pressure maintaining plate 41 and the first forming roller 21, and the two ends of the pressure maintaining section are respectively connected to the pressure maintaining plate 41 and the first forming roller 21, so that the pressure maintaining interval is connected to the compaction space 23 to form a continuous pressure maintaining area, and after the brick blank 5 leaves the first forming roller 21, the pressure is maintained by the pressure maintaining section.

[0045] Therefore, the present application forms a continuous pressure-maintaining area between the compaction space 23 and the pressure-maintaining assembly by setting a pressure-maintaining section, so that the brick blank 5 can maintain a stable pressure state during the movement, thereby avoiding the brick blank 5 from colliding with the step of the pressure-maintaining plate 41 and being damaged, and also reducing the downtime adjustment time caused by the expansion of the brick blank 5, thereby improving production efficiency. After the pressure-maintaining treatment, the structure of the brick blank 5 is more stable, reducing the risk of internal stress concentration and cracks, which helps to improve the overall quality and consistency of the product.

[0046] In addition, when the equipment adjusts the distance between the first forming roller 21 and the second forming roller 22 to adapt to the production of bricks 5 of different specifications, there will be no interference between the pressure maintaining plate 41 and the first forming roller 21, and no mutual wear will occur; thereby enhancing the flexibility and adaptability of the equipment.

[0047] The structure and use of the pressure maintaining section are described below through the second and third embodiments:

[0048] Embodiment 2

[0049] See also Figure 1 In this embodiment, the pressure maintaining section is a pressure maintaining plate 43, and the pressure maintaining plate 43 is detachably connected to the pressure maintaining plate 41. The lower surface of the pressure maintaining plate 43, the lower surface of the pressure maintaining plate 41 and the first compacting surface are all arranged flush.

[0050] It should be noted that the height of the compaction space 23 needs to be set according to the thickness of the brick 5 to be produced, and the height of the compaction space 23 is adjusted by adjusting the downward pressing distance of the first forming roller 21 relative to the second forming roller 22. At the same time, the height of the pressure holding interval also needs to be adjusted according to the thickness of the brick 5, and the height of the pressure holding interval is adjusted by adjusting the distance of the pressure holding plate 41 relative to the support plate 34.

[0051] On the basis of this structure, during assembly, after the first forming roller 21 and the pressure-maintaining plate 41 are adjusted in place, the pressure-maintaining plate 43 can be installed into the installation interval 42, and one end of the pressure-maintaining plate 43 is connected to the pressure-maintaining plate 41, and the other end of the pressure-maintaining plate 43 is connected to the first forming roller 21, and the first forming roller 21 can be rotated close to the pressure-maintaining plate 43. During the installation process, it is necessary to ensure that the lower surface of the pressure-maintaining plate 43, the lower surface of the pressure-maintaining plate 41 and the first compacting surface are all flush, so as to ensure the compaction effect and surface quality of the brick blank 5.

[0052] The pressure plate 43 and the pressure-maintaining plate 41 can be connected through a slot and a buckle. Specifically, a slot is provided on the pressure plate segment, and a corresponding buckle structure is provided on the pressure-maintaining plate 41. By inserting the buckle into the slot, a fastened and detachable connection is achieved by utilizing the elasticity of the buckle. In addition, a friction-reducing material such as PTFE and POM can be provided at the end of the pressure plate 43 close to the first forming roller 21, which can effectively reduce the friction between the first forming roller 21 and the pressure plate 43, thereby improving the operating efficiency and life of the equipment.

[0053] Therefore, through the detachable connection between the pressure maintaining plate 43 and the pressure retaining plate 41, the installation can be simple and quick, and after the pressure maintaining plate 43 is worn out due to long-term use, only the pressure maintaining plate 43 components need to be replaced, and there is no need to replace the pressure retaining plate 41, thereby reducing maintenance costs.

[0054] Embodiment 3

[0055] See also Figure 2 In this embodiment, the pressure-maintaining assembly includes a pressure belt 44, and the pressure belt 44 is in close contact with the lower surface of the pressure-maintaining plate 41 and the first compacting surface. The belt section of the pressure belt 44 located at the installation interval 42 is formed as a pressure-maintaining section, and the pressure belt 44 and the support plate 34 form the pressure-maintaining interval.

[0056] Based on this structure, when using the pressure-maintaining assembly of this embodiment, during assembly, the first forming roller 21 and the pressure-maintaining plate 41 can be adjusted into place first, and ensure that the first compaction surface is flush with the lower surface of the pressure-maintaining plate 41, and then the pressure belt 44 is pressed against the lower surface of the pressure-maintaining plate 41 and the first compaction surface of the first forming roller 21, and the pressure belt 44 is in a tensioned state.

[0057] Since the pressing belt 44 extends from the lower surface of the pressure-maintaining plate 41 to the first compacting surface of the first forming roller 21, and the belt section of the pressing belt 44 located at the installation interval 42 is formed as a pressure-maintaining section, the brick blank 5 is subjected to the pressure-holding effect transmitted from the first forming roller 21 to the pressing belt 44 in the compacting space 23, so that the brick blank 5 is gradually compacted and reaches the required density and thickness, and this pressure-holding effect continues to act on the brick blank 5 as the brick blank 5 is conveyed forward. When the brick blank 5 moves below the installation interval 42, the first forming roller 21 and the pressure-maintaining plate 41 jointly apply uniform pressure to the brick blank 5 through the pressure-maintaining section of the pressing belt 44. When the brick blank 5 moves below the pressure-maintaining plate 41, the pressure-maintaining plate 41 applies uniform pressure to the brick blank 5 through the pressing belt 44 until the brick blank 5 leaves the pressure-maintaining interval.

[0058] In the process of moving the brick blank 5, the height of the compaction space 23 and the pressure holding interval remain unchanged, so that the brick blank 5 can continue to be subjected to pressure in the process of leaving the first forming roller 21 and moving toward the pressure holding structure, which effectively avoids the problem of expansion of the brick blank 5 due to the release of internal stress.

[0059] It is worth noting that the existence of the pressure-maintaining section realizes the gradual change process of compaction pressure and holding pressure, which can prevent the brick 5 from being subjected to sudden pressure changes in the compaction space 23 and the holding interval, thereby causing stress concentration. At the same time, the pressure-maintaining section blocks the installation interval 42, and the brick 5 will not suddenly lose pressure and hit the side steps when reaching the bottom of the holding structure, which greatly reduces the risk of edge damage and internal stress concentration of the brick 5.

[0060] Furthermore, the pressure-maintaining assembly further includes a driven roller 45 , which is disposed on one side of the first forming roller 21 , and the pressure belt 44 is disposed around the driven roller 45 and the first forming roller 21 .

[0061] Specifically, the pressure belt 44 includes a first arc segment, a second arc segment, a first connecting segment and a second connecting segment, and the first arc segment is closely arranged with the first forming roller 21, and the second arc segment is closely arranged with the driven roller 45, wherein the first connecting segment and the second connecting segment are respectively connected with the first arc segment and the second arc segment, and the second connecting segment is closely arranged with the lower surface of the pressure maintaining plate 41 and the first compaction surface.

[0062] Based on this structure, when in use, after the powder layer enters the compacting space 23, the first forming roller 21 rotates at a certain speed driven by the motor, and its surface is in close contact with the first arc segment of the pressing belt 44. The first forming roller 21 drives the pressing belt 44 to rotate together, and compacts the powder layer below it through the end of the first arc segment to form it into a brick 5. Then the brick 5 enters below the installation interval 42 and is received and pressed by the second connecting section.

[0063] The pressing belt 44 may be a belt or a steel belt. The pressing belt 44 rotates under the drive of the first forming roller 21 , and moves relative to the lower surface of the pressure-maintaining plate 41 .

[0064] Since the first arc segment and the second connecting segment are continuous segment bands, a continuous pressure maintaining surface is formed between the first compacting surface and the lower surface of the pressure maintaining plate 41, which ensures the continuity and stability of the compaction process and greatly improves production efficiency and product quality.

[0065] In addition, the driven roller 45 rotates under the drive of the pressure belt 44 , and the driven roller 45 plays a role in supporting the pressure belt 44 and ensuring that the pressure belt 44 can rotate smoothly.

[0066] Furthermore, the lower surface of the pressure-maintaining plate 41 is made of a friction-reducing material.

[0067] Specifically, a layer of high-performance anti-friction material such as PTFE (polytetrafluoroethylene) or POM (polyoxymethylene) can be provided on the lower surface of the pressure-maintaining plate 41; more specifically, a thin sheet of PTFE or POM material can be adhered to the lower surface of the pressure-maintaining plate 41 using an adhesive, or some grooves or reserved installation positions can be machined on the lower surface of the pressure-maintaining plate 41, and then block-shaped or strip-shaped parts made of PTFE or POM material can be embedded therein. These materials have extremely low friction coefficients and excellent wear resistance, and can effectively reduce the friction resistance of the pressure belt 44 during relative movement with the lower surface of the pressure-maintaining plate 41, thereby extending the service life of the pressure belt 44 and the pressure-maintaining plate 41, and reducing energy consumption.

[0068] Furthermore, the pressure-maintaining assembly includes a pressure-maintaining driving member 46, and the pressure-maintaining driving member 46 is used to drive the pressure-maintaining plate 41 to move up and down relative to the support plate 34. The pressure-maintaining driving member 46 can be an oil cylinder, an air cylinder, etc.

[0069] Therefore, when the forming roller assembly 2 adjusts the height of the compaction space 23 through the up and down movement of the first forming roller 21, the pressure maintaining assembly can drive the pressure maintaining plate 41 to move up and down relative to the support plate 34 through the pressure maintaining drive 46, so that the height of the pressure maintaining interval is equal to the height of the compaction space 23, while ensuring that the lower surface of the pressure maintaining plate 41 is flush with the first compaction surface.

[0070] Furthermore, the feeding channel 10 includes a feed section 15 and a feed section 16 distributed from top to bottom, wherein the feed section 15 is provided with a pushing screw 17, the feed section 16 is a curved section, and the lower end of the feed section 16 extends to the compaction space 23 and forms the feed end 12.

[0071] Based on this structure, when conveying powder, the powder in the feed section 15 enters the feeding section 16 under the push of the push screw 17. Since the feeding section 16 is a curved section, when the powder enters the feeding section 16 from the feed section 15, it will gradually accumulate in the curved section to form a powder layer of a certain thickness and density, and then be sent into the compacting space 23 by the feeding end 12.

[0072] The setting of the curved segment enables the feeding channel 10 to guide the powder from the vertical direction to the horizontal direction, so that the powder layer enters the compaction space 23 at a horizontal angle. Specifically, when the powder accumulates to a certain extent in the feeding segment 16, it will gradually slide into the compaction space 23 under the push of gravity and the push screw 17. In this process, the powder will gradually change direction along the shape of the curved segment, and finally enter the compaction space 23 at a suitable angle.

[0073] Thus, the multi-stage setting of the feeding channel 10 not only ensures the stable transportation of the powder, but also reduces the loss and waste of the powder during the transportation process. In addition, the accumulation of the powder in the curved segment can reduce the air content in the powder, which not only helps the uniform distribution of the powder, but also improves the cohesion between the powders.

[0074] It should be noted that the vertical cross section of the feeding end 12 is rectangular, so that the powder layer at the feeding end 12 has a square cross section with uniform thickness.

[0075] Furthermore, the hopper 1 is connected to the compacting space 23 by a discharge pipe, and the discharge pipe is detachably connected to the hopper 1. A discharge channel 14 is provided in the discharge pipe, and the discharge channel 14 connects the feeding channel 10 and the compacting space 23. In addition, the height and width of the discharge channel 14 are adjustable.

[0076] Based on this structure, when in use, the discharge pipe is first connected to the feeding section 16 to ensure that the connection is firm and stable. After the powder passes through the feeding section 16, it will enter the discharge pipe. In the discharge pipe, the powder material will continue to move along the discharge channel 14, and gradually adjust its shape and thickness, and form a powder layer with uniform thickness at the end of the discharge channel 14.

[0077] The discharge pipe extends in the horizontal direction, and the vertical section of the discharge pipe is rectangular. According to actual needs, discharge pipes of different specifications can be selected, specifically, discharge pipes with discharge channels 14 of different heights and widths can be selected, and the discharge pipe and the feeding section 16 can be detachably connected by plugging and splicing, which is convenient for replacing the discharge pipe, thereby realizing the height adjustment and width adjustment of the discharge channel 14 to meet the production needs of brick blanks 5 of different sizes and shapes.

[0078] Therefore, the setting of the discharge pipe enables the equipment to adapt to the production requirements of bricks 5 of different sizes. And the existence of the discharge pipe enables the cross-sectional shape of the powder material to be better adjusted before entering the compaction space 23, which helps to reduce the fluidity and energy consumption of the material during the compaction process, and improve the compaction efficiency and the quality of the bricks 5.

[0079] In addition, some transition structures (such as gradient plates, guide plates, etc.) can be provided at the connection between the feeding section 16 and the discharge pipe to further ensure the smooth transition of the powder material and reduce the leakage or accumulation of powder at the connection.

[0080] Further, see Figure 3 , sidewall strips 31 are provided on both sides of the compaction space 23, and adjustment plates 32 are provided on both sides of the discharge channel 14, and the sidewall strips 31 extend from the compaction space 23 to the discharge channel 14 and connect with the adjustment plates 32. A discharge interval is formed between the adjustment plates 32 on both sides of the discharge channel 14, and the adjustment plate 32 on one side can move closer to or farther from the adjustment plate 32 on the other side, so that the width of the discharge interval can be adjusted.

[0081] It should be noted that when the adjustment plates 32 are not provided on both sides of the discharge channel 14, the width of the powder layer led out through the discharge channel 14 is equal to the width of the discharge channel 14. In this embodiment, by providing the adjustment plates 32 on both sides of the discharge channel 14, the width of the powder layer led out through the discharge channel 14 is equal to the distance between the adjustment plates 32 on both sides, so as to meet the production requirements of more brick blanks 5 of different specifications.

[0082] Based on this structure, during transportation, a discharge pipe that meets the thickness requirement of the brick 5 can be selected from a plurality of preset discharge pipes according to the thickness of the brick 5 to be produced, and the discharge pipe can be seamlessly connected to the feeding section 16 to avoid leakage or accumulation of powder during the transition process.

[0083] Then, according to the width of the selected brick 5, the adjusting plate 32 in the discharge pipe is adjusted. This operation can be achieved by manual adjustment, mechanical device or automatic control system to adjust the width of the discharge interval to match the width of the selected brick 5.

[0084] Since one end of the side guard strip 31 is connected to the adjustment plate 32, the powder layer is received and guided by the side guard strip 31 after being discharged from the discharge pipe. Since the powder on both sides of the powder layer is constrained by the side guard strip 31, the powder layer can maintain a uniform thickness and enter the compaction space 23.

[0085] Among them, one end of the side guard strip 31 and one end of the adjustment plate 32 can be embedded in each other or connected by connecting parts such as screws, so that when the adjustment plate 32 moves to adjust the discharge interval width, the side guard strip 31 will also move accordingly, thereby automatically keeping the width of the retaining interval between the two side guard strips 31 consistent with the discharge interval width.

[0086] Embodiment 4

[0087] This embodiment discloses a ceramic powder molding method, which can be applied to the ceramic powder molding equipment in the first embodiment, the second embodiment and the third embodiment. The ceramic powder molding method includes the following steps:

[0088] Step S1: First, after filling the hopper 1 with powder, the powder is accumulated at the feeding end 11 of the feeding channel 10 and transported to the feeding end 12 of the feeding channel 10. A pushing screw 17 can be set in the feeding section 15 to push the powder to the feeding section 16 of the feeding channel 10. The feeding section 16 is a curved arc section, and the powder forms a powder layer with uniform thickness at the feeding end 12.

[0089] Step S2: Subsequently, the powder layer at the feeding end 12 enters the compacting space 23 under the push of the powder in the feeding channel 10; in the compacting space 23, the first forming roller 21 and the second forming roller 22 work together to compact the powder layer to form a brick 5.

[0090] Step S3: Next, the brick 5 enters the pressure holding interval under the push of the first forming roller 21 and the second forming roller 22, and the pressure holding plate 41, the pressure maintaining section and the support plate 34 work together to limit the expansion of the brick 5; finally, the brick 5 is output by the receiving device 4.

[0091] Thus, a powder layer with uniform thickness is directly outputted through the feeding end 12 of the hopper 1, ensuring that the powder layer forms a brick 5 with uniform cross-sectional shape after being pressed. Subsequently, the brick 5 is continuously pressurized by the pressure-maintaining component, so that the final brick 5 is not prone to cracks and other problems, and meets the established quality standards.

[0092] Among them, the ceramic powder forming method of the present application realizes a continuous production process from powder to brick blank 5. The distribution of the hopper 1, the compaction of the forming roller, the pressure maintenance of the pressure-maintaining component, and the output of the material receiving device 4 together constitute an efficient and stable production system that meets the needs of large-scale production. This system can continuously and stably output high-quality brick blanks 5, and it is not easy for cavities, bubbles, etc. to exist inside the formed brick blanks 5, and it is not easy for cracks, stratification, etc. to appear on the surface of the brick blank 5.

[0093] In addition, during the preparation process, since the installation interval 42 between the pressure-maintaining plate 41 and the first forming roller 21 is properly handled, the brick blank 5 is prevented from colliding with the side steps of the pressure-maintaining plate 41 or the brick blank is stuck in the equipment. Once the brick blank is stuck, the entire production process will be forced to be interrupted, and the structure of the brick blank 5 may also be damaged. Since the present application avoids the occurrence of the above-mentioned problems, there is no need to adjust the brick blank 5 when outputting the brick blank 5, thereby ensuring the stable operation of the production line and further improving the overall production efficiency.

[0094] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A ceramic powder molding device, characterized in that: include, A forming roller assembly, comprising a first forming roller and a second forming roller, wherein the first forming roller and the second forming roller are arranged opposite to each other in a vertical direction, the bottom end of the first forming roller has a first compacting surface, the top end of the second forming roller has a second compacting surface, and a compacting space is formed between the first compacting surface and the second compacting surface; A feeding assembly comprises a hopper, wherein a feeding channel is provided in the hopper, wherein two ends of the feeding channel are a feeding end and a feeding end respectively, wherein the feeding end extends to the compacting space, and the feeding channel is used to transport powder material in a direction from the feeding end to the feeding end; A pressure-maintaining assembly comprises a support plate, a pressure-maintaining plate and a pressure-maintaining section, wherein the pressure-maintaining plate is arranged adjacent to the first forming roller, and there is an installation gap between the end of the pressure-maintaining plate and the bottom end of the first forming roller in the horizontal direction, the pressure-maintaining section is arranged in the installation gap, and the two ends of the pressure-maintaining section are respectively connected to the pressure-maintaining plate and the first forming roller; the pressure-maintaining plate and the pressure-maintaining section are both arranged opposite to the support plate and form a pressure-maintaining gap, the pressure-maintaining gap is connected to the compaction space, and the height of the pressure-maintaining gap is the same as the height of the compaction space.

2. The ceramic powder molding equipment according to claim 1, characterized in that: The pressure maintaining section is a pressure maintaining plate, and the pressure maintaining plate is detachably connected to the pressure maintaining plate; the lower surface of the pressure maintaining plate, the lower surface of the pressure maintaining plate and the first compacting surface are all arranged flush.

3. The ceramic powder molding equipment according to claim 1, characterized in that: The pressure-maintaining assembly includes a pressure belt, which is tightly attached to the lower surface of the pressure-maintaining plate and the first compacting surface; the belt section of the pressure belt located at the installation interval is formed as the pressure-maintaining section; and the pressure-maintaining interval is formed between the pressure belt and the support plate.

4. The ceramic powder molding equipment according to claim 3, characterized in that: The pressure-maintaining assembly comprises a driven roller, the driven roller is arranged on one side of the first forming roller, and the pressure belt is arranged around the driven roller and the first forming roller.

5. The ceramic powder molding equipment according to claim 4, characterized in that: The lower surface of the pressure maintaining plate is made of anti-friction material.

6. The ceramic powder molding equipment according to any one of claims 1 to 5, characterized in that: The pressure-maintaining assembly includes a pressure-maintaining driving member, and the pressure-maintaining driving member is used to drive the pressure-maintaining plate to move up and down relative to the supporting plate.

7. The ceramic powder molding equipment according to claim 1, characterized in that: The feeding channel includes a feeding section and a feeding section distributed from top to bottom, and the feeding section is provided with a pushing screw; the feeding section is a curved section, and the lower end of the feeding section extends to the compacting space and forms the feeding end.

8. The ceramic powder molding equipment according to claim 7, characterized in that: The hopper is connected to the compacting space by a discharge pipe, and the discharge pipe is detachably connected to the hopper; a discharge channel is provided in the discharge pipe, and the discharge channel connects the feeding channel and the compacting space; the height and width of the discharge channel are adjustable.

9. The ceramic powder molding equipment according to claim 8, characterized in that: Side guard strips are provided on both sides of the compaction space, and adjustment plates are provided on both sides of the discharge channel. The side guard strips extend from the compaction space to the discharge channel and are connected to the adjustment plates. A discharge gap is formed between the adjustment plates on both sides of the discharge channel, and the adjustment plate on one side can move closer to or away from the adjustment plate on the other side so that the width of the discharge gap can be adjusted.

10. A ceramic powder molding method, characterized in that: The following steps are involved: Step S1: After the powder is filled into the hopper, the powder is accumulated at the feeding end of the feeding channel and transported to the feeding end of the feeding channel, and the powder forms a powder layer with uniform thickness at the feeding end; Step S2: the powder layer at the feeding end enters the compacting space under the push of the powder in the feeding channel; in the compacting space, the first forming roller rotates and cooperates with the second forming roller to compact the powder layer to form a brick; Step S3: The brick blank enters the pressure holding interval under the push of the first forming roller and the second forming roller, and the pressure holding plate, the pressure maintaining section and the support plate work together to limit the expansion of the brick blank; finally, the brick blank is output by the material receiving device.

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