Pug extrusion force uniformizing device for honeycomb ceramic structural body processing

Abstract

The utility model provides a pug extrusion force uniformizing device for processing a honeycomb ceramic structural body, which can effectively solve the quality problem of the honeycomb ceramic structural body caused by non-uniform extrusion force when the honeycomb ceramic structural body is produced by an extruder, and comprises an extruder extension body, the extruding machine extension body is arranged between an extruding head of an extruding machine and a honeycomb structure body extruding die, the extruding machine extension body comprises a smooth inner cavity, and the two ends of the inner cavity are communicated with a discharging port of the extruding head and a feeding port of the honeycomb structure body extruding die respectively. A first spoiler is arranged on the side, close to the extrusion head, of the inner cavity, a second spoiler is arranged on the side, close to the honeycomb structure body extrusion die, of the inner cavity, and variable-diameter holes are formed in the first spoiler and the second spoiler.

Description

Technical Field

[0001] This utility model relates to the field of silicon carbide honeycomb ceramic structure processing technology, specifically to a clay extrusion force uniform device for processing honeycomb ceramic structures. Background Technology

[0002] Currently, in the processing of honeycomb structures, in order to improve production efficiency, a continuous extrusion press with spiral thrust is generally used. When the extrusion press is started, the clay is forced through the honeycomb structure die under pressure. The clay forms the required honeycomb structure through the die. After the honeycomb structure is extruded and formed, it is cooled by a cooling device to fix its shape. Finally, the continuous honeycomb structure is cut into specific lengths or shapes as needed.

[0003] The advantage of using a continuous extruder is that it allows for continuous extrusion production without stopping the machine. However, it also presents some problems. A particularly prominent issue is the uneven thrust caused by the spiral feeder, resulting in lower thrust in the center and higher thrust at the periphery. This leads to problems in the extrusion production of honeycomb ceramic structures, such as product bending, uneven end faces, diamond-shaped grids, and loose pore walls in the central areas. Therefore, solving the problem of uniform extrusion force distribution in the extrusion production of honeycomb ceramic structures is an urgent issue to be addressed. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a device for uniformly distributing clay extrusion force in the processing of honeycomb ceramic structures, which can effectively solve the quality problems of honeycomb ceramic structures caused by uneven extrusion force when using an extruder to produce honeycomb ceramic structures.

[0005] The technical solution is as follows: A device for uniformly distributing clay extrusion force in the processing of honeycomb ceramic structures includes an extruder extension body, which is disposed between the extrusion head of the extruder and the honeycomb structure extrusion die. The extruder extension body includes a unobstructed inner cavity, the two ends of which are respectively connected to the discharge port of the extrusion head and the inlet of the honeycomb structure extrusion die. A first baffle is provided on the side of the inner cavity near the extrusion head, and a second baffle is provided on the side of the inner cavity near the honeycomb structure extrusion die. The first baffle and the second baffle are provided with diameter-changing holes.

[0006] Furthermore, the size of the variable diameter hole on the first spoiler is larger than the size of the variable diameter hole on the second spoiler.

[0007] Furthermore, the diameter of the variable diameter hole on the first spoiler is 6.5mm-7.2mm, and the diameter of the variable diameter hole on the second spoiler is 4.8mm-5.3mm.

[0008] Furthermore, the length of the extruder extension body from the extrusion head to the honeycomb structure extrusion die is 140mm-160mm.

[0009] Furthermore, flange connection portions are provided at both ends of the extruder extension body, and the extruder extension body is connected to the extrusion head through the flange connection portions.

[0010] Furthermore, the honeycomb structure extrusion die is fixed together with the extruder extension body through a die flange and a flange connection part.

[0011] Furthermore, the thickness of the first spoiler is 14mm-16mm, and the thickness of the second spoiler is 7mm-9mm.

[0012] Furthermore, a slot is provided on the side of the inner cavity near the extrusion head, and the first baffle is disposed in the slot. An installation groove is provided on the side of the inner cavity near the honeycomb structure extrusion mold, and the second baffle is disposed in the installation groove.

[0013] Furthermore, the second spoiler is 22mm-26mm away from the extrusion die of the honeycomb structure.

[0014] This utility model discloses a clay extrusion force uniformity device for processing honeycomb ceramic structures. Through the addition of an extension body and variable diameter plates, it effectively improves the thrust distribution during clay extrusion, avoiding product defects caused by uneven thrust. This significantly reduces issues such as bending, misaligned end faces, rhomboid grids, and loose pore walls in the middle of the honeycomb ceramic structure, thus improving the overall quality of the honeycomb ceramic structure. By extending the extrusion path of the clay, the internal stress of the clay is fully released, allowing more time and space for shaping during extrusion, reducing internal stress and preventing product bending and loose pore walls. Combined with the addition of a first baffle plate, the flow rate and pressure distribution of the clay are adjusted, resulting in more uniform thrust. The addition of a second baffle plate further adjusts the flow of the clay in the final stage, ensuring uniform pressure distribution upon entering the mold, preventing grid deformation and loose pore walls. The cooperation of the extension body and the two variable diameter plates adjusts the flow path and pressure distribution of the clay, resulting in more uniform extrusion force and reducing product defects caused by uneven thrust. The material extrusion force uniform device for processing honeycomb ceramic structures according to this invention can significantly reduce problems such as product bending, uneven end faces, rhomboid grids, and loose central hole walls, thereby improving the overall quality and consistency of the product, reducing the scrap rate caused by quality problems, and improving the continuity and efficiency of production. Attached Figure Description

[0015] Figure 1This is a schematic diagram of a clay extrusion force homogenizing device for processing honeycomb ceramic structures in an embodiment.

[0016] Figure 2 This is a schematic diagram of the first spoiler in one embodiment;

[0017] Figure 3 This is a cross-sectional view of the first spoiler along direction AA in one embodiment;

[0018] Figure 4 This is a schematic diagram of the second spoiler in one embodiment;

[0019] Figure 5 This is a schematic cross-sectional view of the second spoiler along the BB direction in one embodiment;

[0020] Figure 6 A schematic diagram of a honeycomb ceramic structure produced using existing technology from a first-view perspective;

[0021] Figure 7 This is a schematic diagram of a honeycomb ceramic structure produced by using the clay extrusion force uniform device for processing honeycomb ceramic structures according to the present invention, from a first-view perspective.

[0022] Figure 8 A schematic diagram of a honeycomb ceramic structure produced using existing technology from a second perspective.

[0023] Figure 9 This is a schematic diagram of a honeycomb ceramic structure produced by using the clay extrusion force uniform device for processing honeycomb ceramic structures according to the present invention, from a second perspective.

[0024] Figure 10 A schematic diagram of a honeycomb ceramic structure produced using existing technology from a third-person perspective;

[0025] Figure 11 This is a schematic diagram of a honeycomb ceramic structure produced using the clay extrusion force uniform device of this invention for processing honeycomb ceramic structures, viewed from a third-person perspective. Detailed Implementation

[0026] See Figure 1This utility model discloses a device for uniformly distributing extrusion force of clay material in the processing of honeycomb ceramic structures. The device includes an extruder extension body 1, which is disposed between the extrusion head 2 of the extruder and the honeycomb structure extrusion die 3. The extruder extension body 1 includes a unobstructed inner cavity 101. The two ends of the inner cavity 101 are respectively connected to the discharge port of the extrusion head 2 and the inlet of the honeycomb structure extrusion die 3. A first baffle 4 is provided on the side of the inner cavity near the extrusion head 2, and a second baffle 5 is provided on the side of the inner cavity near the honeycomb structure extrusion die 3. The first baffle 5 and the second baffle 6 are provided with variable diameter holes 7.

[0027] See Figures 2 to 5 Specifically, in this utility model, variable diameter holes 7 can be evenly distributed on the first spoiler 5 and the second spoiler 6, and the size of the variable diameter holes on the first spoiler 5 is larger than the size of the variable diameter holes on the second spoiler 6.

[0028] In one specific embodiment, the diameter of the variable-diameter holes on the first baffle 5 is 6.5mm-7.2mm, and the diameter of the variable-diameter holes on the second baffle 6 is 4.8mm-5.3mm. By limiting the diameter of the variable-diameter holes 7 on the first baffle 5 and the second baffle 6, the flow rate and pressure of the slurry during the extrusion process can be adjusted. A suitable hole diameter can increase the resistance to the slurry, resulting in increased pressure and decreased flow rate when the slurry passes through the variable-diameter plate, which helps to achieve a more uniform extrusion force distribution. However, if the diameter of the variable-diameter plate hole is too large, it cannot provide sufficient resistance to evenly distribute the extrusion force, which may cause the slurry in the middle part to have loose hole walls due to insufficient thrust. Conversely, if the diameter of the variable-diameter plate hole is too small, it will increase the extrusion resistance, resulting in excessive overall extrusion resistance, affecting production efficiency, and may lead to product deformation or extrusion difficulties, ultimately affecting product quality.

[0029] In the embodiments, by precisely controlling the aperture of the variable diameter plate, the extrusion molding process of the clay can be optimized, ensuring that each cell of the honeycomb ceramic structure can be uniformly filled with clay, thereby ensuring the stability of the product's shape and structure. By setting an appropriate variable diameter plate between the extruder extension and the extrusion die, stress concentration inside the clay can be effectively reduced, reducing the risk of problems such as bending and misalignment of the end face during the extrusion process.

[0030] Specifically, in this invention, the length of the extruder extension body 1 from the extrusion head 2 to the honeycomb structure extrusion die 3 is 140mm-160mm. The extruder extension body 1 can increase the stroke of the clay, making the clay more uniform before entering the extrusion die. In the embodiment, by setting an appropriate length for the extruder extension body 1, the pressure distribution of the clay during the extrusion process can be optimized, reducing product quality problems caused by uneven pressure. An appropriate length for the extruder extension body 1 can also adjust the fluidity of the clay, allowing it to reach the optimal plasticization state before entering the die, which is beneficial for forming a uniform honeycomb structure. Controlling the length of the extension body can avoid excessive resistance and ensure the smooth progress of the extrusion process. An appropriate length of the extension body can ensure smooth flow of the clay during the extrusion process and improve production efficiency.

[0031] The clay extrusion force homogenizing device used in this embodiment for processing honeycomb ceramic structures removes 80-90% of the rotational force when the rotating clay passes through the 6.5-7.3mm diameter holes on the first baffle plate 5, resulting in relatively uniform clay extrusion force. When the clay passes through the 4.8-5.3mm diameter holes on the second baffle plate 6 again, the extrusion force becomes almost completely uniform. Through these two diameter changes, the clay enters the mold in a completely uniform pressure state, solving problems such as product bending, uneven end faces, rhomboid grids, and loose hole walls in the middle section caused by uneven extrusion force.

[0032] Specifically, in one embodiment of this utility model, the thickness of the first baffle is 14mm-16mm, and the thickness of the second baffle is 7mm-9mm. Setting the thickness of the first baffle and the second baffle appropriately can ensure that the mud is more evenly distributed when passing through the variable diameter plate, and reduce product defects caused by uneven material distribution.

[0033] Specifically, in one embodiment of this utility model, flange connection parts 102 are respectively provided at both ends of the extruder extension body 1. The extruder extension body 1 is connected to the extrusion head 2 through the flange connection parts 102. At the other end, the honeycomb structure extrusion mold 3 cooperates with the flange connection parts 102 through the mold flange 4 and is fixed together with the extruder extension body 1. The connection of the flange structure can be achieved by bolts.

[0034] To fix the first spoiler 5 and the second spoiler 6, the first spoiler 5 can be fixed by setting a slot on the extruder extension body 1 that matches the size of the first spoiler 5. In other embodiments, the slot can also be on the extrusion head 2, or a combination of slots on both the extruder extension body 1 and the extrusion head 2 to support the fixing of the first spoiler. The first variable diameter plate 5 is placed in the slot, and the first spoiler 6 is fixed by connecting and fixing it to the extrusion head 2 through the flange connection part 102. The second spoiler can be set by setting a stepped or slotted mounting groove in the extruder extension body. The second spoiler can be set to fit tightly with the inner cavity 101.

[0035] Specifically, in one embodiment of this utility model, the second baffle 6 is 22mm-26mm away from the honeycomb structure extrusion mold. The position of the second baffle 6 will affect the pressure of the mud at the mold inlet. An appropriate distance can provide sufficient pressure to ensure that the mud can fill the mold smoothly and evenly, while avoiding extrusion problems caused by excessive or insufficient pressure. This helps to optimize the flow characteristics of the mud in the mold and improve the dimensional accuracy and surface quality of the product.

[0036] Figure 6 A schematic diagram of a honeycomb ceramic structure produced using existing technology from a first-view perspective; Figure 7 This is a schematic diagram of a honeycomb ceramic structure produced using the clay extrusion force homogenizing device of this invention, viewed from a first perspective; for comparison. Figure 6 and Figure 7 Before adopting the solution of this utility model, the 120mm honeycomb ceramic structure bent by 0.5mm-2mm. After adopting the device of this utility model, the bending was only 0mm-0.5mm, which significantly improved the bending of the whole product caused by uneven extrusion pressure.

[0037] Figure 8 This is a schematic diagram of a honeycomb ceramic structure produced using existing technology from a second-view perspective. Figure 9 This is a schematic diagram of a honeycomb ceramic structure produced by using the material extrusion force uniform device for processing honeycomb ceramic structures according to the present invention from a second perspective. Before using the solution of the present invention, the end face of the honeycomb ceramic structure was not straight, and the mesh qualification rate of the honeycomb ceramic structure was only 75%. After using the device of the present invention, the qualification rate exceeded 95%, the end face of the honeycomb ceramic structure was square, and the probability of rhombuses appearing in the mesh was greatly reduced.

[0038] Figure 10 This is a schematic diagram of a honeycomb ceramic structure produced using existing technology from a third-person perspective. Figure 10 It is evident that the honeycomb ceramic structure has loose pore walls in the dark gray central part. Figure 11This is a schematic diagram of a honeycomb ceramic structure produced using the uniform extrusion force device for processing honeycomb ceramic structures according to the present invention, viewed from a third-person perspective. The porosity of the pore walls in the middle part of the ceramic structure is significantly reduced, and the problem of porosity in the middle is basically solved.

[0039] In this invention, an experimental control group was also set up to test the effects of different parameter settings on production efficiency and product quality. The length of the extruder extension body, the aperture of the second spoiler, and the aperture of the first spoiler were used as control variables to study their effects on the extrusion production of honeycomb ceramic structures. Each control group considered only one parameter, while keeping other parameters within the recommended range, and other equipment, including the die and extruder, remained unchanged. Table 1 below shows the experimental design and results:

[0040] Table 1

[0041]

[0042]

[0043] illustrate:

[0044] (1) In the experimental control group, the control group for the length of the extruder extension body was:

[0045] Control group A1: The length of the extruder extension body is 150mm, between 140mm and 160mm.

[0046] Control group B1: The length of the extruder extension body is 170mm, which exceeds 160mm.

[0047] Control group C1: The length of the extruder extension body is 130mm, which is less than 140mm.

[0048] Analyze the impact of changes in the length of the extruder extension body:

[0049] The results of the control group A1 experiment showed that the extrusion resistance was moderate, the production efficiency was high, and the product quality was good.

[0050] Experimental results for control group B1: Increased extrusion resistance, affecting production efficiency.

[0051] The results of the control group C1 experiment showed that the internal stress of the clay could not be fully released, resulting in problems such as product bending, uneven end face, grid-like rhombus shape, and loose hole walls in the middle part.

[0052] Considering the effect of the extruder extension length alone, exceeding or falling below the recommended range in the examples can affect production efficiency and product quality.

[0053] (2) Control group of second spoiler aperture:

[0054] Control group A2: The diameter of the second spoiler hole is 5.1 mm, which is between 4.8 mm and 5.3 mm.

[0055] Control group B2: The diameter of the second spoiler hole is 4.9 mm, which is less than 4.8 mm.

[0056] Control group C2: The second spoiler has a hole diameter of 6.0 mm, which is greater than 5.3 mm.

[0057] Analyze the impact of changes in the aperture of the second spoiler:

[0058] The results of the control group A2 experiment showed that the extrusion resistance was moderate, the mud pushing force was uniform, and the product quality was good.

[0059] Results of experiment B2 (control group): Increased extrusion resistance and decreased production efficiency.

[0060] The results of the control group C2 experiment showed that the uniformity of mud pushing was poor, which affected product quality.

[0061] Considering the effect of the second baffle aperture alone, it is demonstrated that exceeding or falling below the recommended range can affect the uniformity of mud thrust, production efficiency, and product quality.

[0062] (3) Control group of first spoiler aperture:

[0063] Control group A3: The diameter of the first spoiler hole is 6.6 mm, which is between 6.5 mm and 7.2 mm.

[0064] Control group B3: The diameter of the first spoiler hole is 8mm, which is greater than 7.2mm.

[0065] Control group C3: The diameter of the first spoiler hole is 5.5 mm, which is less than 6.5 mm.

[0066] Analyze the impact of changes in the aperture of the first spoiler:

[0067] The results of the control group A3 experiment showed that the extrusion resistance was moderate, the mud pushing force was uniform, and the product quality was good.

[0068] The results of the control group B3 experiment showed that the uniformity of mud pushing was poor, which affected product quality.

[0069] The results of the control group C3 experiment showed that the extrusion resistance increased and the production efficiency decreased.

[0070] Considering the effect of the first baffle aperture alone, it is demonstrated that exceeding or falling below the recommended range can affect the uniformity of mud thrust, production efficiency, and product quality.

[0071] Through the analysis of the above control group settings and experimental results, it can be clearly seen that the length of the extruder extension body, the aperture of the second baffle, and the aperture of the first baffle have an impact on the extrusion production of honeycomb ceramic structures under the specific point values ​​set in this invention. The settings of control groups A1, B1, and C1 are all within the recommended parameter range, and good extrusion effect, production efficiency, and product quality are expected. However, the settings of control groups A2 and A3, B2 and B3, and C2 and C3 exceed the recommended range, and varying degrees of increased extrusion resistance, decreased production efficiency, and product quality problems are expected. These results verify the effectiveness of controlling the length of the extruder extension body, the aperture of the second baffle, and the aperture of the first baffle within the specific range provided by this invention.

[0072] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0073] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for uniformizing the extrusion force of a clay for the processing of honeycomb ceramic structures, characterized by: The extruder extension body is arranged between the extrusion head of the extruder and the honeycomb structure extrusion die, and comprises a smooth inner cavity, the two ends of the inner cavity are communicated with the discharge port of the extrusion head and the feeding port of the honeycomb structure extrusion die respectively, a first spoiler is arranged on the side of the inner cavity close to the extrusion head, and a second spoiler is arranged on the side of the inner cavity close to the honeycomb structure extrusion die, and variable-diameter holes are arranged on the first spoiler and the second spoiler.

2. The uniform extrusion force device for greenware of honeycomb ceramic structure according to claim 1, wherein: The size of the variable-diameter holes on the first spoiler is larger than that of the variable-diameter holes on the second spoiler.

3. The device for uniformizing the extrusion force of the clay mass for the processing of honeycomb ceramic structures according to claim 2, characterized in that: The diameter of the variable-diameter holes on the first spoiler is 6.5mm-7.2mm, and the diameter of the variable-diameter holes on the second spoiler is 4.8mm-5.3mm.

4. The uniform extrusion force device for greenware for honeycomb ceramic structure according to claim 2, wherein: The length of the extruder extension body in the direction from the extrusion head to the honeycomb structure extrusion die is 140mm-160mm.

5. The slip extrusion force uniformizing device for honeycomb ceramic structure processing according to claim 1, characterized in that: Flange connecting parts are further arranged at the two ends of the extruder extension body respectively, and the extruder extension body is connected with the extrusion head through the flange connecting parts.

6. The uniformity device for extrusion force of clay for honeycomb ceramic structure according to claim 5, wherein: The honeycomb structure extrusion die is fixed with the extruder extension body through cooperation of the die flange and the flange connecting part.

7. The uniform clay extrusion force device for honeycomb ceramic structure processing according to claim 3, wherein: The thickness of the first spoiler is 14mm-16mm, and the thickness of the second spoiler is 7mm-9mm.

8. The uniformity device for extrusion force of clay for honeycomb ceramic structure according to claim 1, wherein: A clamping groove is arranged on the side of the inner cavity close to the extrusion head, and the first spoiler is arranged in the clamping groove; an installation groove is arranged on the side of the inner cavity close to the honeycomb structure extrusion die, and the second spoiler is arranged in the installation groove.

9. The slip extrusion force uniformizing device for honeycomb ceramic structure processing according to claim 1, characterized in that: The second spoiler is 22mm-26mm away from the honeycomb structure extrusion die.

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