Ceramic fiber pipe forming die

Abstract

The utility model discloses a ceramic fiber tube forming die which comprises two groups of die bodies, a first connecting block and a second connecting block are respectively fixed on two sides of the die bodies. Compared with the prior art, due to the split type mold body structural design, the risk of structural damage during demolding of the ceramic fiber pipe is remarkably reduced, the first connecting block and the second connecting block arranged on the two sides of the mold body are accurately engaged through a step structure and anti-skid lines and are matched with the first bolt for locking, and the sealing performance and stability of the forming cavity are ensured; the mold core is of a gradually-changed taper structure, the maximum-diameter end is fixed to the connecting flange, contact resistance between a fiber pipe and the mold core during demolding is effectively reduced, the pressure relief opening releases redundant gas in the initial forming stage to avoid the bubble defect, the supporting spring pushes the sealing plate to close the air hole to maintain forming pressure in the later stage, and the rejection rate is greatly reduced; and meanwhile, the split type die body design simplifies the die maintenance process, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of ceramic fiber tube production technology, and in particular to a ceramic fiber tube forming mold. Background Technology

[0002] Ceramic fiber tubes, as core components in high-temperature flue gas filtration, exhibit significantly superior temperature resistance (up to 1300℃) compared to traditional polyester and fiberglass dust bags, demonstrating irreplaceable advantages in extreme conditions such as blast furnace gas purification in metallurgical applications and dust removal in cement kilns. However, current production processes using integral casting molds face significant technical bottlenecks: the strong adhesion between the solidified ceramic fiber slurry and the mold's inner wall makes the tube structure highly susceptible to damage during demolding. Industry survey data shows that the scrap rate of fiber tubes produced using traditional molds is as high as 18%-22%, with the main defects being axial cracks and end chipping. This also results in high production costs and other shortcomings. Therefore, we propose a ceramic fiber tube molding mold. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a ceramic fiber tube forming mold.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A ceramic fiber tube forming mold includes a mold body, with a first connecting block and a second connecting block fixed on both sides of the mold body respectively. There are two sets of mold bodies. The two first connecting blocks and the two second connecting blocks are locked together by a first bolt. A connecting flange is installed on one side of the two mold bodies by a second bolt. A mold core is installed on the connecting flange. The mold core is inserted between the two mold bodies to form a detachable forming cavity.

[0006] Preferably, the top of the mold body is provided with a pressure relief port, the pressure relief port includes an air pipe fixed on the mold body, the bottom of the air pipe is connected to a fixing plate, and the surface of the fixing plate is evenly distributed with through air holes.

[0007] Preferably, a movable rod is installed on the fixed plate, and a sealing plate and a movable plate are respectively installed at both ends of the movable rod. A support spring is installed between the movable plate and the fixed plate.

[0008] Preferably, a sealing ring is provided between the sealing plate and the air pipe, and the support spring is sleeved on the movable rod.

[0009] Preferably, the contact surface between the connecting flange and the mold body is provided with a positioning flange, and the mold core adopts a gradually tapered structure design, with its maximum diameter end connected to the connecting flange.

[0010] Preferably, both the first connecting block and the second connecting block are provided with interlocking stepped structures, and anti-slip textures are provided between the first connecting block and the second connecting block.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention significantly reduces the risk of structural damage during demolding of ceramic fiber tubes through a split mold structure design (two sets of molds are detachably assembled via a first bolt and a connecting flange). The first and second connecting blocks on both sides of the mold achieve precise engagement through a stepped structure and anti-slip texture, and are locked in place with the first bolt to ensure the sealing and stability of the molding cavity. The mold core adopts a gradually tapered structure, with the largest diameter end fixed to the connecting flange, effectively reducing the contact resistance between the fiber tube and the mold core during demolding. The pressure relief port design achieves dynamic balance of internal pressure during curing through the through-hole on the fixed plate, the linkage between the movable rod and the support spring: initially releasing excess gas to avoid bubble defects, and later pushing the sealing plate to close the vent to maintain molding pressure, greatly reducing the scrap rate. At the same time, the split mold design simplifies the mold maintenance process and reduces production costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a ceramic fiber tube forming mold proposed in this utility model;

[0014] Figure 2 for Figure 1 Installation diagram of the middle mold core;

[0015] Figure 3 for Figure 1 Cross-sectional view of the pressure relief port;

[0016] Figure 4 for Figure 3 Top view of the fixed plate.

[0017] In the diagram: 1. Mold body, 2. First connecting block, 3. Second connecting block, 4. First bolt, 5. Connecting flange, 6. Mold core, 7. Second bolt, 8. Pressure relief port, 81. Air pipe, 82. Fixing plate, 83. Air hole, 84. Movable rod, 85. Sealing plate, 86. Movable plate, 87. Support spring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figure 1-4A ceramic fiber tube forming mold includes a mold body 1. A first connecting block 2 and a second connecting block 3 are fixed to both sides of the mold body 1. There are two sets of mold bodies 1. Both the first connecting block 2 and the second connecting block 3 have interlocking stepped structures. Anti-slip textures are provided between the first connecting block 2 and the second connecting block 3. The two first connecting blocks 2 and the two second connecting blocks 3 are locked together by first bolts 4. A connecting flange 5 is installed on one side of each of the two mold bodies 1 by second bolts 7. A mold plate is mounted on the connecting flange 5. The core 6 is inserted between two mold bodies 1 to form a detachable molding cavity. The connecting flange 5 has a positioning flange on its contact surface with the mold body 1. The core 6 adopts a gradually tapered structure design, and its maximum diameter end is connected to the connecting flange 5. A pressure relief port 8 is opened at the top of the mold body 1. The pressure relief port 8 includes an air pipe 81 fixed on the mold body 1. A fixing plate 82 is connected to the bottom of the air pipe 81. The surface of the fixing plate 82 has evenly distributed through air holes 83. A movable rod 84 is installed on the fixing plate 82. Sealing plates 85 are installed at both ends of the movable rod 84. A support spring 87 is installed between the movable plate 86 and the fixed plate 82. A sealing ring is set between the sealing plate 85 and the air pipe 81. The support spring 87 is sleeved on the movable rod 84. Through the split mold structure design (two sets of molds are detachably assembled through the first bolt and connecting flange), the risk of structural damage during demolding of ceramic fiber tubes is significantly reduced. The first and second connecting blocks set on both sides of the mold achieve precise interlocking through the stepped structure and anti-slip texture, and are locked with the first bolt to ensure the sealing and stability of the molding cavity. The mold core adopts a gradual taper structure, and the maximum diameter end is fixed to the connecting flange, which effectively reduces the contact resistance between the fiber tube and the mold core during demolding. The pressure relief port design achieves dynamic balance of internal pressure during curing through the through air hole on the fixed plate, the movable rod and the support spring linkage: in the early stage, excess gas is released to avoid bubble defects, and in the later stage, the support spring pushes the sealing plate to close the air hole to maintain the molding pressure, which greatly reduces the scrap rate. At the same time, the split mold design simplifies the mold maintenance process and reduces production costs.

[0020] When the mold is working, the two sets of mold bodies 1 are locked together by the first bolt 4 to form the main molding cavity by the first connecting block 2 and the second connecting block 3. The mold core 6 is fixed by the connecting flange 5 and inserted into the gap of the mold body 1 to form a detachable gradually tapered cavity. After the ceramic fiber slurry is injected, the air pipe 81 of the pressure relief port 8 discharges gas through the through air hole 83. In the early stage of curing, the movable plate 86 is pushed by the slurry pressure to compress the movable rod 84 and the support spring 87. The sealing plate 85 is separated from the air pipe 81 to achieve pressure relief. As the slurry solidifies and shrinks, the support spring 87 returns to its original position and pushes the sealing plate 85 to close the air hole and maintain the molding pressure. When demolding, the second bolt 7 is first removed to separate the connecting flange 5 and the mold body 1. Then the first bolt 4 is loosened to separate the two sets of mold bodies 1. The tapered structure of the mold core 6 reduces the contact area between the fiber tube and the mold core 6. Combined with the split mold body 1 structure, the strong adsorption effect of the traditional integral mold is completely eliminated, and the demolding is achieved without damage. The stepped interlocking structure of the first connecting block 2 and the second connecting block 3 and the positioning flange ensure the consistency of molding accuracy after multiple disassembly and assembly.

[0021] In summary, compared with existing technologies, this utility model, through its split mold structure design (two sets of molds are detachably assembled via a first bolt and a connecting flange), significantly reduces the risk of structural damage during demolding of ceramic fiber tubes. The first and second connecting blocks on both sides of the mold achieve precise engagement through a stepped structure and anti-slip texture, and are locked in place with the first bolt to ensure the sealing and stability of the molding cavity. The mold core adopts a gradually tapered structure, with the largest diameter end fixed to the connecting flange, effectively reducing the contact resistance between the fiber tube and the mold core during demolding. The pressure relief port design achieves dynamic balance of internal pressure during curing through the through-hole on the fixed plate, the linkage between the movable rod and the support spring: initially releasing excess gas to avoid bubble defects, and later pushing the sealing plate to close the vent to maintain molding pressure, greatly reducing the scrap rate. At the same time, the split mold design simplifies the mold maintenance process and reduces production costs.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A ceramic fiber tube forming mold, comprising a mold body (1), characterized in that, The mold body (1) has a first connecting block (2) and a second connecting block (3) fixed on both sides respectively. There are two sets of mold bodies (1). The two first connecting blocks (2) and the two second connecting blocks (3) are locked together by a first bolt (4). A connecting flange (5) is installed on one side of the two mold bodies (1) by a second bolt (7). A mold core (6) is installed on the connecting flange (5). The mold core (6) is inserted between the two mold bodies (1) to form a detachable molding cavity.

2. The ceramic fiber tube forming mold according to claim 1, characterized in that, The top of the mold (1) is provided with a pressure relief port (8), which includes an air pipe (81) fixed on the mold (1). The bottom of the air pipe (81) is connected to a fixing plate (82), and the surface of the fixing plate (82) is evenly distributed with through air holes (83).

3. The ceramic fiber tube forming mold according to claim 2, characterized in that, A movable rod (84) is installed on the fixed plate (82). A sealing plate (85) and a movable plate (86) are respectively installed at both ends of the movable rod (84). A support spring (87) is installed between the movable plate (86) and the fixed plate (82).

4. The ceramic fiber tube forming mold according to claim 3, characterized in that, A sealing ring is provided between the sealing plate (85) and the air pipe (81), and the support spring (87) is sleeved on the movable rod (84).

5. A ceramic fiber tube forming mold according to claim 1, characterized in that, The connecting flange (5) has a positioning flange on the contact surface with the mold body (1), and the mold core (6) adopts a gradually tapered structure design, with its maximum diameter end connected to the connecting flange (5).

6. The ceramic fiber tube forming mold according to claim 1, characterized in that, Both the first connecting block (2) and the second connecting block (3) are provided with interlocking stepped structures, and anti-slip textures are provided between the first connecting block (2) and the second connecting block (3).

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