Filter tube mold, wet demolding equipment and demolding method

Abstract

The invention belongs to the technical field of filter tube suction filtration, and discloses a filter tube mold, wet demolding equipment and a demolding method.The filter tube mold comprises a mandrel, air expansion sleeves and perforated plates, the multiple air expansion sleeves are connected to the outer side of the mandrel in a sleeving mode, the multiple perforated plates are arranged on the outer side of the mandrel in a surrounding mode after being spliced, the perforated plates are connected to the air expansion sleeves, and the air expansion sleeves can control radial shrinkage and expansion of the perforated plates. The wet demolding equipment comprises a filter pipe mold, a movable seat, a drying bracket, a clamping seat and a ground rail, the filter pipe mold sleeved with a filter pipe can be erected on the drying bracket, one end of a core shaft in the filter pipe mold is clamped on the clamping seat, the drying bracket is fixed on the movable seat, the movable seat is arranged on the ground rail in a sliding mode, and the ground rail is arranged on the ground rail. The movable seat can drive the drying bracket and the filter pipe to move back to the clamping seat, so that the filter pipe is separated from the filter pipe mold. Through the simple structure, wet demolding of the filter pipe after forming is achieved, the production efficiency and the product quality are improved, meanwhile, the filter pipe cannot be damaged, and the filter pipe demolding device can be suitable for demolding of filter pipes of different sizes.

Description

Technical Field

[0001] The invention relates to the technical field of filter tube filtration, and in particular to a filter tube mold, wet demoulding equipment and a demoulding method. Background Art

[0002] For ceramic fiber filter tubes, the existing molding methods can be roughly divided into inner mold vacuum filtration and outer mold vacuum filtration. Inner mold vacuum filtration generally places the mold connected to a vacuum pump directly in a configured slurry pool, and then starts the vacuum pump. The fibers in the slurry pool will adhere to the outer surface of the mold and form. The formed filter tube is placed in an oven together with the mold for baking, and the mold is pulled out manually or mechanically after drying. Outer mold vacuum filtration is to inject the configured slurry into the mold through the central axis, and use the vacuum method on the outside of the mold to attach the fibers to the inside of the mold for molding, and then withdraw the formed filter tube from the central axis and open the mold, take out the filter tube for drying, or bake the mold and the filter tube together until the filter tube is taken out after drying.

[0003] However, for the above two methods, the outer mold vacuum filtration equipment is too complicated, and the molding process requirements are high, the efficiency is too low, and the inner wall is rough and cannot be processed. The inner mold vacuum filtration equipment is relatively simple, the process requirements are not high, and the efficiency is also good, but its demoulding is more difficult. Specifically, when the inner mold vacuum filtration method is adopted, the filter tube produced cannot be subjected to tension in its wet embryo state, and it is difficult to perform wet demoulding with high efficiency and quality. The demoulding method after drying must be adopted, but after drying, a large friction force will be generated between the filter tube and the mold. Excessive tension is easily damaged by the filter tube, and the longer the filter tube size, the higher the demoulding difficulty, which limits the production of long filter tubes.

[0004] Therefore, how to achieve wet demoulding after filter tube molding through a simple structure, improve production efficiency and product quality, without damaging the filter tube, and be applicable to demoulding of filter tubes of different sizes is a problem that people in this field need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a filter tube mold, wet demoulding equipment and demoulding method, so as to realize wet demoulding after the filter tube is formed through a simple structure, thereby improving production efficiency and product quality without causing damage to the filter tube, and being suitable for demoulding of filter tubes of different sizes.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The filter tube mold comprises:

[0008] A core shaft, an air expansion sleeve and a porous plate, wherein a plurality of the air expansion sleeves are sleeved on the outer side of the core shaft, a plurality of the porous plates are spliced ​​and arranged around the outer side of the core shaft, the porous plates are connected to the air expansion sleeves, and the air expansion sleeves can control the radial expansion and contraction of the porous plates.

[0009] Optionally, it also includes keys, several of which are embedded in the inflatable sleeve, and the porous plate is connected to the keys. The inflatable sleeve has at least an inflated state and a deflated state. In the inflated state, the key protrudes from the inflatable sleeve, and in the deflated state, the key retracts into the inflatable sleeve.

[0010] Optionally, it also includes a sealing plate, which is respectively sleeved on both ends of the core shaft, and the porous plate is against the sealing plate and can slide relatively therebetween.

[0011] Optionally, the core shaft is made of a hollow tube and is provided with a plurality of air holes, and both ends or one end of the core shaft is connected to a vacuum pump.

[0012] Optionally, the porous plate is provided with a plurality of through holes, and two adjacent porous plates can be plugged into each other.

[0013] Optionally, a plurality of the protrusions are provided on the edge of the porous plate, a groove is provided between two adjacent protrusions, and the protrusion of one porous plate can be plugged into the groove of another porous plate.

[0014] In another aspect, a wet demoulding apparatus, wherein:

[0015] The filter tube mold, the movable seat, the drying bracket, the clamping seat and the ground rail, the filter tube mold with the filter tube can be mounted on the drying bracket, and one end of the core shaft in the filter tube mold is clamped on the clamping seat, the drying bracket is fixed on the movable seat, the movable seat is slidably arranged on the ground rail, and the movable seat can drive the drying bracket and the filter tube to move back to the clamping seat so that the filter tube is separated from the filter tube mold.

[0016] Optionally, the movable seat includes a support plate and a bearing plate, the support plate is slidably arranged on the ground rail, the bearing plate is arranged above the support plate, and the drying bracket is fixed on the bearing plate.

[0017] Optionally, the floor rail includes a slide rail and a rack, a motor and a gear connected to the motor are arranged below the support plate, the gear is meshed with the rack, and the support plate is slidably arranged in the slide rail.

[0018] In another aspect, a demoulding method, using the wet demoulding device, comprises the following steps:

[0019] The filter screen or filter cloth is sleeved on the outside of the filter tube mold, and the air expansion sleeve is inflated to control the radial expansion of the porous plate to tighten the filter screen or filter cloth;

[0020] Connect the mandrel to the vacuum pump and place it in the configured slurry pool for filtration;

[0021] The filter tube formed by suction filtration and the filter tube mold are placed on a drying bracket in the wet demoulding equipment, and one end of the core shaft is fixed by a clamping seat;

[0022] By deflation, the gas expansion sleeve controls the porous plate to undergo radial contraction, and a gap exists between the porous plate and the filter screen or filter cloth;

[0023] The movable seat is driven to slide on the ground rail back to the clamping seat to complete the wet demoulding of the filter tube;

[0024] The filter screen or filter cloth in the filter tube is taken out and then dried, or the filter screen or filter cloth in the filter tube is taken out after being dried.

[0025] Beneficial effects of the present invention:

[0026] The present invention utilizes a gas expansion sleeve to be sleeved on the mandrel, and connects the porous plate with the gas expansion sleeve, and utilizes the gas expansion sleeve to control the radial shrinkage and expansion of the porous plate, so as to realize the change of the radial size of the filter tube mold, and then after the filter screen or filter cloth is subsequently sleeved for vacuum filtration of the filter tube, the filter tube can be easily wet-demolded under the radial shrinkage and expansion of the porous plate, so as to ensure that the inner wall thereof will not have problems such as convex points and wrinkles, and ensure that the inner wall thereof is smooth and flat. In addition, a plurality of porous plates are provided, and they can be arranged around the outer side of the mandrel after splicing, so as to ensure the smooth radial shrinkage and expansion of the porous plates, will not be interfered by movement, and effectively avoid the appearance of a whole long longitudinal seam after the filter tube is formed, so as to ensure the quality of the filter tube. On the other hand, by utilizing the sliding of the movable seat on the ground rail, the fixing of the filter tube mold by the clamping seat, and the support of the filter tube by the drying bracket, the filter tube can be wet-demolded without using excessive force, and is suitable for demoulding of filter tubes of different sizes, with a wide range of application, and the yield rate and production efficiency are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a structural schematic diagram of a filter tube mold according to an embodiment of the present invention;

[0028] Figure 2 is a schematic structural diagram of a wet demoulding device according to an embodiment of the present invention;

[0029] Figure 3 yes Figure 1 A local enlarged schematic diagram of the middle A;

[0030] Figure 4It is a schematic diagram of the structure of connecting multiple porous plates in the filter tube mold according to an embodiment of the present invention;

[0031] Figure 5 Schematic diagram of the structure of a single porous plate in the filter tube mold according to an embodiment of the present invention;

[0032] Figure 6 is a side view schematic diagram of the connection of multiple porous plates in the filter tube mold according to an embodiment of the present invention;

[0033] Figure 7 yes Figure 2 A local enlarged schematic diagram of point B in the middle.

[0034] In the figure:

[0035] 10-mandrel; 101-air hole; 20-expansion sleeve; 30-key; 40-porous plate; 401-through hole; 402-bump; 403-groove; 50-sealing plate; 501-air inlet; 60-movable seat; 61-support plate; 62-support plate; 70-drying bracket; 100-clamping seat; 110-clamping head; 120-three-jaw chuck; 200-ground rail; 210-slide rail; 220-rack. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] The technical solution of this embodiment is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0040] like Figure 1-Figure 7 As shown, this embodiment provides a filter tube mold, including a core shaft 10, an inflatable sleeve 20 and a porous plate 40, a plurality of inflatable sleeves 20 are sleeved on the outside of the core shaft 10, a plurality of porous plates 40 are spliced ​​and arranged around the outside of the core shaft 10, the porous plate 40 is connected to the inflatable sleeve 20, and the inflatable sleeve 20 can control the radial expansion and contraction of the porous plate 40.

[0041] The wet demoulding equipment includes a filter tube mold, a movable seat 60, a drying bracket 70, a clamping seat 100 and a ground rail 200. The filter tube mold with a filter tube can be mounted on the drying bracket 70, and one end of the core shaft 10 in the filter tube mold is clamped on the clamping seat 100. The drying bracket 70 is fixed on the movable seat 60, and the movable seat 60 is slidably set on the ground rail 200. The movable seat 60 can drive the drying bracket 70 and the filter tube to move back to the clamping seat 100 to make the filter tube detach from the filter tube mold.

[0042] The demoulding method, using the above wet demoulding equipment, comprises the following steps:

[0043] The filter screen or filter cloth is sleeved on the outside of the filter tube mold, and the air expansion sleeve 20 is inflated to control the radial expansion of the porous plate 40 to tighten the filter screen or filter cloth;

[0044] Connect the mandrel 10 to the vacuum pump and place it in the configured slurry pool for filtration;

[0045] The filter tube formed by suction filtration and the filter tube mold are placed on a drying bracket 70 in the wet demoulding equipment, and one end of the core shaft 10 is fixed by a clamping seat 100;

[0046] By deflation, the gas expansion sleeve 20 controls the porous plate 40 to contract radially, and a gap exists between the porous plate 40 and the filter screen or filter cloth;

[0047] The movable seat 60 is driven to slide on the ground rail 200 away from the clamping seat 100 to complete the wet demoulding of the filter tube;

[0048] The filter screen or filter cloth in the filter tube is taken out and then dried, or the filter screen or filter cloth in the filter tube is taken out after being dried.

[0049] Specifically, this embodiment utilizes the air expansion sleeve 20 to be sleeved on the core shaft 10, and the porous plate 40 is connected to the air expansion sleeve 20, and the air expansion sleeve 20 is used to control the placement of the radial expansion and contraction of the porous plate 40, so as to realize the change of the radial size of the filter tube mold, and then after the subsequent sleeve filter or filter cloth is installed for vacuum filtration of the filter tube, the filter tube can be easily wet demoulded under the radial expansion and contraction of the porous plate 40, so as to ensure that there will be no convex points, wrinkles and other problems on its inner wall, and ensure that its inner wall is smooth and flat. In addition, there are multiple porous plates 40, and they can be spliced ​​and arranged around the outside of the core shaft 10, so as to ensure the smooth expansion and contraction of the porous plates 40 in the radial direction, without being interfered by movement, and effectively avoid the appearance of a whole long longitudinal seam after the filter tube is formed, thereby ensuring the quality of the filter tube. On the other hand, by utilizing the sliding of the movable seat 60 on the ground rail 200, the fixing of the filter tube mold by the clamping seat 100, and the support of the filter tube by the drying bracket 70, the filter tube can be wet-demolded without using excessive force. The method is suitable for demolding filter tubes of different sizes, has a wide range of applications, and improves both the yield rate and production efficiency.

[0050] The specific structure of the filter tube mold in this embodiment is described below.

[0051] like Figure 1 , Figure 3-Figure 6 As shown, the filter tube mold in this embodiment includes a mandrel 10, an air expansion sleeve 20, a key 30, a porous plate 40 and a sealing plate 50. Optionally, in this embodiment, several air expansion sleeves 20 are sleeved on the outside of the mandrel 10, and several porous plates 40 can be arranged around the outside of the mandrel 10 after splicing, and the air expansion sleeve 20 has at least an inflated state and a deflated state. By switching between different states, the radial shrinkage and expansion of the porous plate 40 can be controlled, so that the spacing between the porous plate 40 and the mandrel 10 can be controlled, which is convenient for subsequent demoulding. Specifically, multiple porous plates 40 are arranged for splicing, which can not only meet the effect of radial shrinkage and expansion without interference, but also effectively avoid falling off or having a long gap during the radial shrinkage and expansion process, which is not conducive to the filtration molding of the filter tube. Exemplarily, in this embodiment, several air expansion sleeves 20 can be connected in series, so that the expansion and contraction effect of all air expansion sleeves 20 can be achieved by inflating and deflation at only one end, completing the overall state switching, and ensuring that the porous plate 40 is evenly stressed. The specific series connection method can be set according to the needs of those skilled in the art. Other connection methods can also be set in other embodiments, which will not be described in detail here.

[0052] Further, the key 30 is embedded in the inflatable sleeve 20, and when the inflatable sleeve 20 is in an inflated state, the key 30 is protruded from the inflatable sleeve 20, and when it is in a deflated state, the key 30 retracts to the inflatable sleeve 20. Specifically, the porous plate 40 is connected to the key 30, so as to realize the connection between the porous plate 40 and the inflatable sleeve 20, and realize the radial contraction and expansion of the porous plate 40 under the telescopic movement of the key 20. Exemplarily, sealing plates 50 are also provided at both ends of the core shaft 10, so as to seal the space between the outer side of the core shaft 10 and the porous plate 40 to prevent vacuum leakage. Specifically, the porous plate 40 abuts against the sealing plate 50, and the two can slide relative to each other, so as to ensure the sealing effect without affecting the radial contraction and expansion of the porous plate 40.

[0053] like Figure 1 As shown, in this embodiment, the mandrel 10 is made of a hollow tube, that is, its interior is through-set. Further, a plurality of air holes 101 are arranged on the mandrel 10, thereby connecting the interior of the mandrel 10 with the external environment. Specifically, both ends or one end of the mandrel 10 are connected to the vacuum pump, and the specific setting can be determined according to the length of the filter tube, so as to serve as the gas source inlet for subsequent vacuum filtration. Correspondingly, a plurality of through holes 401 are also arranged on the porous plate 40, so that when the filter tube mold is subsequently placed in the slurry pool for filtration operation, the liquid can be drawn away from the inside of the mandrel 10 through the through holes 401 and the air holes 101, and the ceramic fibers in the slurry pool are blocked on the outside of the porous plate 40 to achieve filtration molding, and a ceramic fiber filter tube is made. Exemplarily, the air holes 101 are evenly arranged on the mandrel 10, and the through holes 401 are also arranged on the porous plate 40 in an array, so as to ensure the circulation of vacuum gas and facilitate the rapid pumping of liquid. Specifically, in this embodiment, the aperture range of the through hole 401 is set to 5 mm-8 mm, and the hole spacing range is set to 15 mm-25 mm.

[0054] Combination Figure 1 and Figure 3 As shown, in this embodiment, four gas expansion sleeves 20 are evenly arranged along the axial direction of the core shaft 10, and a number of accommodating grooves are evenly arranged around the circumference of the gas expansion sleeve 20 for placing the key 30. For example, when the gas expansion sleeve 20 is inflated, the key 30 can protrude 2-3 mm from the outside of the gas expansion sleeve 20, and the key 30 will not be separated from the gas expansion sleeve 20. The specific connection method is set according to the conventional method in the art. Furthermore, a threaded hole is provided on the key 30, and a countersunk hole is correspondingly provided on the porous plate 40. The countersunk bolts are sequentially passed through the countersunk holes and the threaded holes to tightly fix the porous plate 40 and the key 30, so as to realize the radial expansion and contraction of the porous plate 40, and ensure the smoothness of the outer wall of the porous plate 40 without unevenness, thereby improving the smoothness of the inner wall of the filter tube and ensuring the quality of the filter tube.

[0055] Combination Figure 4-Figure 6As shown, in this embodiment, a plurality of porous plates 40 are provided, and two adjacent porous plates 40 can be plugged into each other, so as to be spliced ​​into a cylindrical structure, which is sleeved on the outside of the core shaft 10. Specifically, a plurality of protrusions 402 are provided on the edge of the porous plate 40, and a groove 403 is provided between two adjacent protrusions 402. The protrusion 402 of one porous plate 40 can be plugged into the groove 403 of another porous plate 40, so as to realize the splicing of multiple porous plates 40. Figure 5 and Figure 6 As shown, in this embodiment, the porous plate 40 is configured as an arc-shaped plate, and the length can be set according to the overall length limit of the filter tube mold. It can also be divided into multiple sections for assembly, so that it is divided into unit blocks in the axial and circumferential directions for connection, which is not only convenient for processing and installation, but also can ensure the overall radial shrinkage effect.

[0056] For example, in this embodiment, four porous plates 40 can be plugged in to form a cylindrical structure. In other embodiments, three or more porous plates can be used to form a cylindrical structure. The specific setting can be made as needed. Furthermore, in this embodiment, adjacent porous plates 40 are detachably connected by plug-in connection of protrusions 402 and grooves 403. In other embodiments, other zigzag structures can be used for staggered interlocking connection to ensure that the radial expansion and contraction will not be interfered with and prevent the two porous plates 40 from falling off during the expansion and contraction process.

[0057] like Figure 1 As shown, in this embodiment, the sealing plate 50 is provided with an air inlet 501, and the sealing plate 50 can be fixed to the two ends of the core shaft 10 by welding or gluing, so as to ensure the stability of its installation and ensure the seamless connection between the core shaft 10 and the sealing plate 50 to avoid vacuum leakage. Furthermore, the porous plate 40 can be tightly attached to the inner side of the sealing plate 50, and the two can slide relative to each other, so as to ensure that the porous plate 40 can shrink and expand freely. Exemplarily, in this embodiment, the air inlet 501 is used to inflate the inflatable sleeve 20, and after inflating, the air inlet 501 needs to be blocked with a plug to avoid vacuum leakage. Exemplarily, in this embodiment, several inflatable sleeves 20 can also be directly inflated through the air inlet 501 to achieve overall state switching. The specific series connection method and the inflation channel can be set according to the needs and combined with the relevant content in this field, and are not limited here.

[0058] Specifically, in this embodiment, the filter screen or filter cloth (not shown in the figure) can be sleeved on the outside of the porous plate 40, and when vacuum filtration is performed, the entire filter tube mold is located in the slurry pool, so that the liquid can be drawn away under the action of vacuum, and the ceramic fibers are blocked on the filter screen or filter cloth, and finally a ceramic fiber filter tube is formed. Exemplarily, the inner diameter of the filter screen or filter cloth is slightly smaller than the outer diameter of the cylindrical structure formed by the porous plate 40 after expansion by 1-2mm, so that when the porous plate 40 expands radially, the filter screen or filter cloth can be tensioned, so as to avoid problems such as bumps and wrinkles on the inner wall of the filter tube, and ensure that the inner surface of the filter tube is more beautiful and smooth.

[0059] The specific structure of the wet demoulding equipment in this embodiment is described below.

[0060] like Figure 1 , Figure 2 and Figure 7 As shown, the wet demoulding device in this embodiment includes the above-mentioned filter tube mold, movable seat 60, drying bracket 70, clamping seat 100 and ground rail 200. Optionally, the filter tube mold with the filter tube can be mounted on the drying bracket 70, and one end of the core shaft 10 in the filter tube mold can be clamped on the clamping seat 100, so as to ensure that the filter tube mold can be locked. Further, the drying bracket 70 is fixed on the movable seat 60, and the movable seat 60 is slidably arranged on the ground rail 200, so that the movable seat 60 can drive the drying bracket 70 and the filter tube to move back to the clamping seat 100, thereby realizing the filter tube from the filter tube mold, and achieving the wet demoulding effect.

[0061] Specifically, in this embodiment, the movable seat 60 includes a support plate 61 and a support plate 62, and the support plate 61 is slidably arranged on the ground rail 200, the support plate 62 is arranged above the support plate 61, and the drying bracket 70 is fixed on the support plate 62, so that when the support plate 61 moves relative to the ground rail 200, the support plate 62 can drive the drying bracket 70 to move synchronously. Exemplarily, the support plate 61 is set as an L-shaped structure, and two are provided, so that it can be symmetrically arranged below the support plate 62, ensuring smooth movement while improving the connection stability between the support plate 61 and the support plate 62. In other embodiments, the support plate 61 can also be set as a "X"-shaped structure, so that the support plate 62 can be directly supported to ensure its stability during movement.

[0062] like Figure 7As shown, in this embodiment, the drying bracket 70 includes a bracket base and a bracket body, wherein the bracket base is fixed on the support plate 62, the bracket body is mounted on the bracket base, and a plurality of small holes are arranged in an array on the bracket body, and an arc structure is also arranged to provide rigid support for the filter tube mold, so as to ensure that the subsequent wet filter tube can be stably demoulded and shaped and baked. For example, a plurality of movable seats 60 are arranged below the drying bracket 70 to ensure the stability of the drying bracket 70 during movement and improve the overall demoulding efficiency.

[0063] Specifically, in this embodiment, the ground rail 200 includes a slide rail 210 and a rack 220, and a motor and a gear connected to the motor are arranged below the support plate 61, wherein the gear is meshed with the rack 220, and thus a gear rack transmission mechanism is formed, realizing the power source for the movement of the drying bracket 70 during the entire demoulding process. Further, the support plate 61 is slidably arranged in the slide rail 210, and in this embodiment, two slide rails 210 are arranged, corresponding to the two support plates 61 or to the two ends of a single support plate 61, and the rack 220 is arranged between the two slide rails 210. Further, the ground rail 200 is also provided with a base frame for supporting and fixing the slide rail 210 and the rack 220.

[0064] Optionally, a clamping head 110 and a three-jaw chuck 120 are provided on the clamping seat 100, and the three-jaw chuck 120 is fixed on the clamping head 110 and can lock one end of the core shaft 10, so as to ensure that the filter tube mold is fixed, and then the filter tube can be wet-demolded under the drive of the movable seat 60.

[0065] The specific structure of the demoulding method in this embodiment is described below.

[0066] The demoulding method, using the above wet demoulding equipment, comprises the following steps:

[0067] The filter screen or filter cloth is sleeved on the outside of the filter tube mold, and the air expansion sleeve 20 is inflated to control the radial expansion of the porous plate 40 to tighten the filter screen or filter cloth;

[0068] Connect the mandrel 10 to the vacuum pump and place it in the configured slurry pool for filtration;

[0069] The filter tube formed by suction filtration and the filter tube mold are placed on a drying bracket 70 in the wet demoulding equipment, and one end of the core shaft 10 is fixed by a clamping seat 100;

[0070] By deflation, the inflatable sleeve 20 controls the porous plate 40 to contract radially, so that a gap exists between the porous plate 40 and the filter screen or filter cloth;

[0071] The movable seat 60 is driven to slide on the ground rail 200 away from the clamping seat 100 to complete the wet demoulding of the filter tube;

[0072] The filter screen or filter cloth in the filter tube is taken out and then dried, or the filter screen or filter cloth in the filter tube is taken out after being dried.

[0073] Specifically, after the various parts of the filter tube mold are assembled, it is necessary to put a filter screen or filter cloth on the outside of the filter tube mold, and then inflate the air sleeve 20 through the air inlet hole 501 on the sealing plate 50, so that the porous plate 40 can expand radially, and then use the plug to seal the air inlet hole 501; then connect the end of the core shaft 10 to the pipe of the vacuum pump, and place it in a slurry pool with a good proportion. After starting the vacuum pump system, perform suction filtration and molding operations to form a filter tube; then place the suction-filtered filter tube together with the filter tube mold as a whole on the drying bracket 70, and fix one end of the filter tube mold with a three-jaw chuck 120, and then release the gas of the air sleeve 20 to make the porous plate 40 shrink radially, so that a gap is formed between the filter screen or filter cloth and the filter tube mold, which is convenient for subsequent demolding. Specifically, the motor is started, and the movable seat 60 drives the drying bracket 70 and the filter tube to move back to the clamping seat 100 under the drive of the gear rack transmission mechanism, so that the filter tube is separated from the filter tube mold and wet demoulding is achieved; finally, since the filter screen or filter cloth is still attached to the inner wall of the filter tube, it is necessary to take out the filter screen or filter cloth in the filter tube and dry it, or, after drying, take out the filter screen or filter cloth in the filter tube, so as to complete the demoulding of the filter tube.

[0074] In summary, in this embodiment, the core shaft 10 is provided with air holes 101, so that the vacuum gas source can be evenly distributed over the entire length. A plurality of air expansion sleeves 20 are arranged in series on the core shaft 10. The expansion and contraction of all air expansion sleeves 20 can be achieved by inflating and deflating from one side, and the radial expansion and contraction of the porous plate 40 can be achieved by using the key 30. Not only is the structure simple and easy to implement, but also the stability is high. Further, the porous plate 40 is connected by plug-in connection and provided with a through hole 401, which can not only effectively avoid the appearance of a whole long longitudinal seal of the filter tube during molding, but also ensure the further uniform distribution of the vacuum gas, making the inner wall of the filter tube more beautiful. Accordingly, a filter cloth or filter screen sleeve is arranged on the filter tube mold, and its inner diameter is slightly smaller than the outer diameter size of the filter tube mold after expansion, which can play a tensioning role on the filter screen or filter cloth during expansion, thereby avoiding the problems of bumps and wrinkles on the inner wall of the filter tube after molding, and the inner wall is smoother, and it is easy to demold when the filter tube mold shrinks. Cooperating with other structures of wet demoulding equipment can effectively improve demoulding efficiency and quality, and thereby realize automated demoulding.

[0075] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Filter tube mold, characterized in that: include: A core shaft (10), an inflatable sleeve (20) and a porous plate (40), wherein a plurality of the inflatable sleeves (20) are sleeved on the outside of the core shaft (10), a plurality of the porous plates (40) are spliced ​​and arranged around the outside of the core shaft (10), the porous plates (40) are connected to the inflatable sleeves (20), and the inflatable sleeves (20) can control the radial expansion and contraction of the porous plates (40).

2. The filter tube mold according to claim 1, characterized in that: The invention also comprises keys (30), a plurality of keys (30) are embedded in the inflatable sleeve (20), and the porous plate (40) is connected to the keys (30). The inflatable sleeve (20) has at least an inflated state and a deflated state. In the inflated state, the keys (30) are protruding from the inflatable sleeve (20), and in the deflated state, the keys (30) are retracted into the inflatable sleeve (20).

3. The filter tube mold according to claim 1, characterized in that: It also comprises a sealing plate (50), wherein the sealing plate (50) is respectively sleeved on the two ends of the core shaft (10), and the porous plate (40) abuts against the sealing plate (50) and the two can slide relative to each other.

4. The filter tube mold according to claim 1, characterized in that: The core shaft (10) is made of a hollow tube and is provided with a plurality of air holes (101). Both ends or one end of the core shaft (10) are connected to a vacuum pump.

5. The filter tube mold according to claim 1, characterized in that: The porous plate (40) is provided with a plurality of through holes (401), and two adjacent porous plates (40) can be plugged into each other.

6. The filter tube mold according to claim 5, characterized in that: A plurality of protrusions (402) are arranged on the edge of the porous plate (40), a groove (403) is arranged between two adjacent protrusions (402), and the protrusion (402) of one porous plate (40) can be plugged into the groove (403) of another porous plate (40).

7. Wet demoulding equipment, characterized in that include: The filter tube mold, movable seat (60), drying bracket (70), clamping seat (100) and ground rail (200) described in any one of claims 1 to 6, the filter tube mold with a filter tube can be mounted on the drying bracket (70), and one end of the core shaft (10) in the filter tube mold is clamped on the clamping seat (100), the drying bracket (70) is fixed on the movable seat (60), the movable seat (60) is slidably arranged on the ground rail (200), and the movable seat (60) can drive the drying bracket (70) and the filter tube to move away from the clamping seat (100) so that the filter tube is detached from the filter tube mold.

8. The wet demoulding device according to claim 7, characterized in that The movable seat (60) comprises a supporting plate (61) and a bearing plate (62), wherein the supporting plate (61) is slidably arranged on the ground rail (200), the bearing plate (62) is arranged above the supporting plate (61), and the drying bracket (70) is fixed on the bearing plate (62).

9. The wet demoulding device according to claim 8, characterized in that The floor rail (200) comprises a slide rail (210) and a rack (220); a motor and a gear connected to the motor are arranged below the support plate (61); the gear is meshed with the rack (220); and the support plate (61) is slidably arranged in the slide rail (210).

10. A demoulding method, using the wet demoulding device according to any one of claims 6 to 9, characterized in that: The following steps are involved: The filter screen or filter cloth is sleeved on the outside of the filter tube mold, and the air expansion sleeve (20) is inflated to control the porous plate (40) to expand radially, thereby tensioning the filter screen or filter cloth; Connect the mandrel (10) to a vacuum pump and place it in a configured slurry pool for suction filtration; The filter tube formed by suction filtration and the filter tube mold are placed on a drying bracket (70) in the wet demoulding device, and one end of the core shaft (10) is fixed by a clamping seat (100); By deflation, the gas expansion sleeve (20) controls the porous plate (40) to undergo radial contraction, so that a gap exists between the porous plate (40) and the filter screen or filter cloth; The movable seat (60) is driven to slide on the ground rail (200) away from the clamping seat (100), thereby completing wet demoulding of the filter tube; The filter screen or filter cloth in the filter tube is taken out and then dried, or the filter screen or filter cloth in the filter tube is taken out after being dried.

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