CN212444950U - Drying tool for nano-pore composite material - Google Patents
Drying tool for nano-pore composite material Download PDFInfo
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- CN212444950U CN212444950U CN202021706732.XU CN202021706732U CN212444950U CN 212444950 U CN212444950 U CN 212444950U CN 202021706732 U CN202021706732 U CN 202021706732U CN 212444950 U CN212444950 U CN 212444950U
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Abstract
The utility model relates to a dry frock is used to nanopore combined material, including interior profile orifice plate, outer profile orifice plate, limit thick piece etc, drying device each part combined action realizes the dry to nanopore combined material's guarantor type, frock simple structure, convenient operation, but reuse, and with low costs, through the frock dimension type, the stopper limit is thick, and elasticity is exerted pressure equipment and is provided even elastic restraint, heats drying process ladder temperature regulation stage by stage, realizes nanopore combined material's guarantor type drying, guarantees combined material's complete drying, and no deformation or micro deformation improve the size profile precision and the yield of product.
Description
Technical Field
The utility model relates to a dry frock field, concretely relates to nanopore combined material is with dry frock.
Background
The thermal protection material is one of key technologies for guaranteeing the safe service of the hypersonic aircraft under extreme working conditions. When the aircraft flies at high supersonic speed, the surface of the aircraft is severely rubbed with the atmosphere, the surface temperature is sharply increased by the severe pneumatic heating, the local temperature may even exceed 2000 ℃, and further the internal temperature of the aircraft is increased, and the temperature increase can cause the degradation of internal materials and structural performance. Therefore, it is desirable to use thermal protective materials to protect the fuselage and interior equipment of an aircraft to maintain the temperature within acceptable ranges to ensure the structural integrity and operational safety of the aircraft.
The composite material is taken as an important part of the thermal protection material, and is more and more valued by technical personnel in the thermal protection field in recent years, however, the preparation of the thermal protection composite material is a systematic project and comprises a plurality of links such as resin research and development, preform design and material selection, die tool design and processing, composite material forming and processing and the like, patent CN201911266938.7 discloses a high-strength nanopore ceramizable ablation thermal protection composite material and a preparation method thereof, patent CN201911325924.8 discloses a preparation method of a low-density thermal protection composite material revolving body workpiece, two patents describe a preparation method of the thermal protection material in detail, but the two patents do not describe a drying tool and a drying method in detail, but the drying tool and the drying method are key factors influencing the final size profile of the composite material workpiece.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a realize combined material, guarantor type, complete drying, no deformation, improve the dry frock for nanopore combined material of product size profile precision and yield in order to overcome the defect that above-mentioned prior art exists.
The utility model discloses a drying process is effectively overcome to dry frock because the unexpected deformation of combined material that capillary tension and material internal stress arouse guarantees hot protection combined material's complete drying, realizes that final product does not have deformation or micro deformation, the size profile precision and the yield of great improvement product.
The purpose of the utility model can be realized through the following technical scheme:
the thermal protection material has the advantages of low density, low cost, ablation resistance, scouring resistance, integration of heat prevention and insulation and the like. However, as an important part of the thermal protection material, the thermal protection composite material takes a fiber needling structure prefabricated body as a reinforcement, takes phenolic resin as a matrix and takes alcohol as a solvent.
Through long-term observation and thinking, designers know that due to the fact that the density of the needling structure reinforcement body is uneven, uneven internal force distribution exists in the preparation process of the needling structure reinforcement body, surface tension exists between a solvent and a gas contact surface in a nanometer hole in the drying process, adhesive force exists between the solvent and a solid contact surface, and capillary tension is caused by the combined action of the two forces. The existence of uneven internal stress and capillary tension of the composite material causes unexpected deformation, warping and other phenomena when the composite material is dried in an unconstrained state, the appearance and the profile of a product of the composite material are influenced, and the following specific scheme is adopted to solve the problems:
a drying tool for a nanopore composite material comprises an inner molded surface pore plate and at least one outer molded surface pore plate, wherein during drying, the inner molded surface pore plate and the outer molded surface pore plate are connected and locked and enclose a cavity, the nanopore composite material to be dried is located in the cavity, and two sides of the nanopore composite material are simultaneously attached to the inner molded surface pore plate and the outer molded surface pore plate.
Further, the shapes of the inner profile orifice plate and the outer profile orifice plate are matched with the shape of the nanopore composite material, and the shape of the nanopore composite material comprises a flat plate part, a curved plate part and a revolving body part.
Furthermore, a thickness limiting block for preventing the nano-pore composite material from being excessively compressed is arranged between the inner profile hole plate and the outer profile hole plate.
Furthermore, the outer profile hole plate is provided with a plurality of thickness limiting block grooves for positioning the thickness limiting blocks. The depth of the groove is 2-5 mm.
Furthermore, during drying, the thickness limiting block is arranged between the inner profile pore plate and the outer profile pore plate. This is often the case with the drying of flat and curved plate composites. The height of the thickness limiting block is slightly smaller than the distance between the inner profile pore plate and the outer profile pore plate, so that a certain limiting effect can be achieved in the micro-shrinkage process of the composite material, and the composite material is prevented from being excessively compressed.
Furthermore, during drying, the thickness limiting blocks are arranged among the outer profile pore plates. This is often the case in the drying of composite materials for articles of revolution. As there are typically at least two outer profile orifice plates.
Furthermore, holes with the diameter of 1-5mm and the distance of 1-10mm are distributed on the inner molded surface pore plate and/or the outer molded surface pore plate and the joint of the inner molded surface pore plate and the outer molded surface pore plate and the nano-pore composite material. Too large aperture and too small space can lead the structure of the perforated plate to be the same as the nominal structure, thus the aim of controlling the drying process can not be achieved, and too small aperture and too large space can lead the solvent to volatilize too slowly, thus leading the drying to be carried out smoothly. After repeated practice, a diameter of 2mm and a spacing of 3mm is considered to be a preferred embodiment.
Furthermore, a plurality of positioning grooves for positioning are formed in the edge of the inner-shaped face hole plate, and positioning bosses matched with the positioning grooves are formed in the edge of the outer-shaped face hole plate. This is often the case with the drying of flat and curved plate composites. Pin location is also sometimes used.
Furthermore, the inner profile hole plate and the outer profile hole plate are connected and locked by a locking bolt and a locking nut matched with the locking bolt. This is often the case with the drying of flat and curved plate composites. The locking is now a mechanical locking.
Furthermore, a pressure distributing plate and/or an elastic pressure device is arranged between the locking bolt and the outer profile hole plate. The elastic pressing device can be an elastic pressing material or mechanism such as expanded rubber, high expansion metal or spring, for example, expanded rubber, the thickness of which is determined by the thickness of the dried nanopore composite material, the thickness of the composite material is not more than 20mm, the thickness of the elastic pressing device is preferably 3-5mm, the thickness of the composite material is more than 20mm, and the thickness of the elastic pressing device is preferably 5-8 mm.
Furthermore, a pressure dividing plate and/or an elastic pressure device are arranged between the locking nut and the inner profile hole plate.
Further, interior profile orifice plate below be equipped with interior profile orifice plate base, interior profile orifice plate and outer profile orifice plate all be located interior profile orifice plate base top.
Furthermore, an air felt is laid outside the outer profile pore plate, a vacuum sealing bag is arranged outside the air felt and connected with an air exhaust pipeline and a vacuum system, and a sealing strip for sealing is arranged between the inner profile pore plate base and the vacuum sealing bag. The vacuum value should not be less than 950 mbar. At the moment, the locking is pneumatic locking, and the pneumatic locking device is mainly used for drying composite materials of revolving body workpieces.
The utility model discloses an outer profile orifice plate and interior profile orifice plate are after the closure, the dry speed of combined material has been restricted, the differential process with the direct drying of combined material evolves into a differential process, because combined material and outer profile orifice plate and interior profile orifice plate tightly paste, even the product has the micro-shrinkage in drying process, the frock also can provide and continuously follow up pressure and guarantee that combined material and frock closely laminate in the drying process, the interface bonding tension that produces by the laminating guarantees that combined material drying process is indeformable almost, and then improve the size profile precision and the yield of product, this effect only can realize at and slight differential in-process. However, in order to make the drying process smoothly proceed, the outer profile pore plate and the inner profile pore plate are uniformly distributed with a large number of small pores, so that the solvent in the composite material can be fully volatilized when the composite material is dried in the drying tool, but the volatilization is much slower than the drying rate in the open system.
The method for drying by adopting the tool comprises the following steps:
(1) assembling a drying tool: placing the composite material on the inner molded surface hole plate, placing the thickness limiting block in the groove of the outer molded surface hole plate, placing the inner molded surface hole plate in place in cooperation with the outer molded surface hole plate, placing an elastic pressing device and a pressure dividing plate below the locking screw and/or above the locking nut, and locking the inner molded surface hole plate and the outer molded surface hole plate;
(2) heating and drying: placing the drying tool in heating equipment, carrying out gradient adjustment in stages, when the composite material is completely dried, reducing the temperature of the drying tool to room temperature at a speed of not more than 1 ℃/min, and taking out the drying tool from the heating equipment, wherein the temperature adjustment is divided into two stages, the temperature of the first stage is increased to 40-60 ℃ for drying for 12-24h, and the temperature of the second stage is increased to 80-120 ℃ for drying for 12-24 h;
(3) and (3) disassembling a drying tool: and disassembling the locking screw and the locking nut, disassembling the pressure distributing plate, taking down the elastic pressure applying device, checking whether the elastic pressure applying device can be used for the second time, disassembling the outer molded surface pore plate, taking down the composite material, and maintaining the drying tool.
Compared with the prior art, the utility model has the advantages of it is following:
(1) the utility model discloses an outer profile orifice plate and interior profile orifice plate can bring certain pressure for combined material when closed location, simultaneously, the theoretical thickness of combined material can be guaranteed to the existence of limit thick piece, even there is little shrink in the drying process in the product, the frock also can provide and continue to follow up pressure and guarantee that combined material and frock closely laminate in the drying process, guarantee that combined material drying process is indeformable, outer profile orifice plate and interior profile orifice plate equipartition are equipped with a large amount of apertures, make combined material can fully let the solvent in the combined material volatilize when drying the frock the inside, guarantee product theoretical density, and then improve the size profile precision and the yield of product;
(2) the boss is adopted for positioning between the outer molded surface pore plate and the inner molded surface pore plate, so that the matching degree between the outer molded surface pore plate and the inner molded surface pore plate is higher and quicker, and the drying efficiency and the success rate of the tool are improved;
(3) the outer surface pore plate of the utility model is externally provided with a pressure dividing plate and/or an elastic pressure applying device, the elastic pressure applying device can continuously apply pressure according to the drying process, the composite material is ensured to be tightly attached to the tool in the drying process, and the composite material is ensured not to deform in the drying process;
(4) in the revolving body finished piece, aiming at the characteristic that the inside and the outside of the revolving body finished piece are difficult to be pressed, the utility model innovatively adopts the measure of pneumatic locking, controls the pressure of the outer molded surface pore plate and the inner molded surface pore plate finished piece through the control of the vacuum degree, further ensures that the composite material is tightly attached to a tool in the drying process, and ensures that the composite material is not deformed in the drying process;
(5) the utility model discloses a dry frock mainly includes the dry frock of flat plate, the dry frock of bent plate and the dry frock of solid of revolution finished piece, has included almost all nanopore heat protection combined material structural style, and the frock can provide and last follow-up pressure guarantees that combined material closely laminates with the frock in the drying process, guarantees that combined material drying process is indeformable, improves the size profile precision and the yield of product.
Drawings
FIG. 1 is an exploded view of a drying tool for composite materials of a plate member according to example 1;
FIG. 2 is an assembly drawing of a drying tool for composite material of a plate member in example 1;
FIG. 3 is a bottom view of the drying tool for the composite material of the curved plate member in example 2;
FIG. 4 is an assembly drawing of a drying tool for a composite material of a curved plate member in example 2;
FIG. 5 is a schematic view of a drying tool for a composite material of a rotary body part in example 3;
FIG. 6 is a front view of a drying tool for a composite material of a rotary body part in example 3;
FIG. 7 is a front sectional view of a drying tool for a composite material of a rotary body part in example 3;
the reference numbers in the figures indicate: the plate part comprises a plate part inner molded surface pore plate 1, a plate part thickness limiting block 2, a composite material plate part 3, a plate part outer molded surface pore plate 4, a plate part pressing plate 5, hard silicon rubber 6, a plate part locking bolt 7, a bent plate part outer molded surface pore plate 8, a bent plate part locking bolt 9, a bent plate part pressing plate 10, a spring 11, a bent plate part inner molded surface pore plate 12, a composite material bent plate part 13, a bent plate part thickness limiting block 14, a revolving body part inner molded surface pore plate 15, a composite material revolving body part 16, a revolving body part outer molded surface pore plate 17, a revolving body part thickness limiting block 18, a sealing strip 19, a vacuum sealing bag 20, a breathable felt 21 and a revolving body part inner molded surface pore plate base 22.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The utility model provides a dry frock is used to nanopore combined material, mainly divide into dull and stereotyped piece drying frock, includes dull and stereotyped piece interior profile orifice plate 1, dull and stereotyped piece limit thick piece 2, combined material dull and stereotyped piece 3, dull and stereotyped piece outer profile orifice plate 4, dull and stereotyped piece minute clamp plate 5, stereoplasm silicon rubber 6, dull and stereotyped piece locking bolt 7 seven parts. The drying tool for the curved plate comprises seven parts, namely a curved plate outer molded surface pore plate 8, a curved plate locking bolt 9, a curved plate pressing plate 10, a spring 11, a curved plate inner molded surface pore plate 12, a composite curved plate 13 and a curved plate thickness limiting block 14. The revolved body part drying tool comprises eight parts, namely an inner molded surface pore plate 15 of the revolved body part, a composite revolved body part 16, an outer molded surface pore plate 17 of the revolved body part, a revolving body part thickness limiting block 18, a sealing rubber strip 19, a vacuum sealing bag 20, a breathable felt 21 and an inner molded surface pore plate base 22 of the revolved body part.
The diameters of the holes of the inner molded surface hole plate and the outer molded surface hole plate are 1-5mm, preferably 2mm, the hole interval is 1-10mm, preferably 3mm, the number of the thickness limiting blocks of the three drying tools is 4, and the boss is preferably selected for positioning in the positioning mode of the three tools.
The revolving body part drying tool is slightly different from the drying tools of a flat plate part and a bent plate part, the thickness limiting block of the revolving body part drying tool is placed between the outer surface hole plate blocks and used for limiting the appearance thickness of the revolving body part, and the outer surface hole plate can be ensured to continuously move and be attached to the revolving body part because the revolving body part is locked in a vacuum negative pressure environment without expanding and applying pressure by an elastic material, so that an elastic force application device and a pressure division plate are removed from the revolving body part drying tool, and an air guide material air felt is used for replacing the elastic force application device and the pressure division plate, so that the vacuum negative pressure can be continuously, uniformly and stably applied to the outer surface hole plate. The inner-profile hole plates of the three tools can be replaced by forming dies made of composite materials, but the matching relation needs to be considered, and meanwhile, the drying temperature is properly increased in the drying process, and the drying time is prolonged. This operation can greatly reduce tooling costs.
The utility model also provides a resistant ablation nanopore combined material's of low density drying frock and method, including but not limited to following embodiment:
example 1
A drying tool for a low-density ablation-resistant nanopore composite flat plate part is shown in figures 1-2 and comprises a flat plate part inner molded surface pore plate 1, a flat plate part thickness limiting block 2, a composite flat plate part 3, a flat plate part outer molded surface pore plate 4, a flat plate part pressure distributing plate 5, hard silicon rubber 6 and a flat plate part locking bolt 7; four thickness limiting block grooves for positioning the thickness limiting blocks 2 of the flat plate piece are formed in the outer molded surface pore plate 4 of the flat plate piece, and the depth of each groove is 2-5 mm. Holes with the diameter of 2mm and the distance of 3mm are distributed on the inner molded surface pore plate 1 of the flat plate piece and the outer molded surface pore plate 4 of the flat plate piece.
Four positioning grooves for positioning are formed in the edge of the inner molded surface pore plate 1 of the flat plate piece, and positioning bosses matched with the positioning grooves are formed in the edge of the outer molded surface pore plate 4 of the flat plate piece. The inner molded surface pore plate 1 and the outer molded surface pore plate 4 of the flat plate part are connected and locked and enclose a cavity, the composite flat plate part 3 to be dried is placed in the cavity and is simultaneously attached to the inner molded surface pore plate 1 and the outer molded surface pore plate 4 of the flat plate part, the thickness limiting block 2 of the flat plate part is arranged between the inner molded surface pore plate 1 and the outer molded surface pore plate 4 of the flat plate part, and the inner molded surface pore plate 1 and the outer molded surface pore plate 4 of the flat plate part are connected and locked by adopting a flat plate part locking bolt 7 and a locking nut matched with the flat plate part locking bolt 7. A flat part pressure-distributing plate 5 and hard silicon rubber 6 are arranged between the flat part locking bolt 7 and the flat part outer molded surface pore plate 4, wherein the hard silicon rubber 6 is tightly attached to the flat part outer molded surface pore plate 4.
A drying method of a low-density ablation-resistant nanopore composite flat plate comprises the following drying steps:
step 1: referring to the figure 1-2, a composite material flat plate 3 is placed on a flat plate inner molded surface hole plate 1, a flat plate outer molded surface hole plate 4 is placed in a thickness limiting block groove of the flat plate outer molded surface hole plate 4, positioning is carried out by using a positioning boss, the flat plate outer molded surface hole plate 4 is assembled in place, a flat plate part pressure distributing plate 5 and hard silicon rubber 6 are respectively sleeved on a flat plate part locking bolt 7, the flat plate part locking bolt 7 penetrates through a locking hole of a drying tool, and the flat plate part locking bolt 7 is locked by using a spanner;
step 2: and (3) placing the drying tool in heating equipment, heating the heating equipment to 30-50 ℃, preserving heat for 12-24h, then heating the temperature to 75-95 ℃, preserving heat for 12-24h, after the temperature rise is finished, cooling the drying tool to room temperature at a speed of not more than 1 ℃/min, and taking out the drying tool.
And step 3: and (3) disassembling the locking bolt 7 of the flat plate, disassembling the pressure distributing plate 5 of the flat plate and the hard silicon rubber 6, checking whether the flat plate can be used for the second time, disassembling the outer molded surface pore plate 4 of the flat plate, taking down the composite material flat plate 3, and maintaining a drying tool.
Example 2
A drying tool for a low-density ablation-resistant nanopore composite material curved plate part is shown in figures 3-4, and comprises a curved plate part outer molded surface pore plate 8, a curved plate part locking bolt 9, a curved plate part pressing plate 10, a spring 11, a curved plate part inner molded surface pore plate 12, a composite material curved plate part 13 and a curved plate part thickness limiting block 14; the outer molded surface pore plate 8 of the curved plate part is provided with four thickness limiting block grooves for positioning the thickness limiting blocks 14 of the curved plate part, and the depth of the grooves is 2-5 mm. Holes with the diameter of 2mm and the distance of 3mm are distributed on the inner molded surface pore plate 12 and the outer molded surface pore plate 8 of the bent plate.
The edge of the inner molded surface pore plate 12 of the bent plate is provided with four positioning grooves for positioning, and the edge of the outer molded surface pore plate 8 of the bent plate is provided with a positioning boss matched with the positioning grooves. Profile orifice plate 12 and the outer profile orifice plate 8 of bent plate are connected and are locked and enclose into the cavity in the bent plate spare, treat that dry combined material bent plate spare 13 arranges in the cavity, and laminate with profile orifice plate 12 and the outer profile orifice plate 8 of bent plate spare in the bent plate spare simultaneously, bent plate spare thickness limiter 14 locates in the bent plate spare between profile orifice plate 12 and the outer profile orifice plate 8 of bent plate spare, adopt bent plate spare locking bolt 9 and connect the locking with bent plate spare locking bolt 9 assorted lock nut between profile orifice plate 12 and the outer profile orifice plate 8 of bent plate spare in the bent plate spare. A curved plate part pressure-distributing plate 10 and a spring 11 are arranged between the curved plate part locking bolt 9 and the curved plate part outer molded surface pore plate 8, wherein the spring 11 is tightly attached to the curved plate part outer molded surface pore plate 8.
A drying method of a low-density ablation-resistant nanopore composite material curved plate part comprises the following drying steps:
step 1: with reference to fig. 3-4, a composite material curved plate 13 is placed on the inner molded surface hole plate 12 of the curved plate, a curved plate thickness limiting block 14 is placed at the position of a thickness limiting block groove, a curved plate sub-pressing plate 10 and a spring 11 are inserted on the curved plate locking bolt 9, and the curved plate locking bolt 9 is locked by a wrench;
step 2: placing the drying tool in heating equipment, heating the heating equipment to 30-50 ℃, preserving heat for 12-24h, then heating to 75-95 ℃, preserving heat for 12-24h, after heating, cooling the drying tool to room temperature at a speed of not more than 1 ℃/min, and taking out the drying tool;
and step 3: dismantle bent plate locking bolt 9, dismantle spring 11 and bent plate and divide clamp plate 10, dismantle outer bent plate outer profile orifice plate 8, take off the bent plate 13 of combined material, maintain dry frock.
Example 3
A drying tool for a low-density ablation-resistant nanopore composite material revolving body part comprises a revolving body part, as shown in figures 5-7, an inner molded surface pore plate 15 of the revolving body part, a composite material revolving body part 16, two outer molded surface pore plates 17 of the revolving body part, thickness limiting blocks 18 of the revolving body part, sealing rubber strips 19, a vacuum sealing bag 20, an air-permeable felt 21 and a base 22 of the inner molded surface pore plate of the revolving body part, wherein four thickness limiting block grooves for positioning the thickness limiting blocks 18 of the revolving body part are formed in the outer molded surface pore plates 17 of the revolving body part, and the depth of each groove is 2-5 mm. Holes with the diameter of 2mm and the distance of 3mm are distributed on the inner molded surface pore plate 15 and the outer molded surface pore plate 17 of the revolving body part.
The inner molded surface pore plate 15 of the revolving body part is connected and locked with the outer molded surface pore plate 17 of the revolving body part to form a cavity, the composite revolving body part 16 to be dried is arranged in the cavity and is simultaneously attached to the inner molded surface pore plate 15 of the revolving body part and the outer molded surface pore plate 17 of the revolving body part, the revolving body part thickness limiting block 18 is arranged between the two outer molded surface pore plates 17 of the revolving body part and is used for limiting the shape thickness of the composite revolving body part 16, the inner molded surface pore plate 15 of the revolving body part and the outer molded surface pore plates 17 of the revolving body part are both arranged above the base 22 of the inner molded surface pore plate of the revolving body part, because the locking of the composite revolving body part 16 is in a vacuum negative pressure environment, the outer molded surface pore plates 17 of the revolving body part can be ensured to be continuously attached to the composite revolving body, the air-permeable felt 21 can make the vacuum negative pressure continuously, uniformly and stably act on the outer molded surface pore plate. A sealing adhesive tape 19 is arranged on a base 22 of the inner molded surface pore plate of the revolving body part, an air permeable felt 21 is arranged on the outer molded surface pore plate 17 of the revolving body part, an air exhaust pipeline and a vacuum system are arranged, and the sealing is realized by a vacuum sealing bag 20. Namely, a vacuum sealing bag 20 is sleeved outside the drying tool, and the vacuum sealing bag 20 is connected with an air exhaust pipeline and a vacuum system. The vacuum value should not be less than 950 mbar. The sealing rubber strip 19 is a rubber strip for sealing formed by the vacuum sealing bag 20 and mainly plays a role in sealing, the sealing rubber strip 19 is annularly glued on the inner molded surface pore plate base 22 to wrap the whole revolving body part outer molded surface pore plate 17, and the vacuum sealing bag 20 is tightened under vacuum negative pressure to hold the revolving body part outer molded surface pore plate 17 tightly, which is equivalent to pneumatic locking.
A drying method for a low-density ablation-resistant nanopore composite material revolving body workpiece comprises the following drying steps:
step 1: the method comprises the steps of placing a composite material revolving body part 16 on an inner molded surface pore plate 15 of the revolving body part, placing a thickness limiting block 18 of the revolving body part into a groove of the thickness limiting block of an outer molded surface pore plate 17 of the revolving body part, assembling the outer molded surface pore plates 17 of the two revolving body parts, arranging a sealing adhesive tape 19 on a base 22 of the inner molded surface pore plate of the revolving body part, arranging an air permeable felt 21 on the outer molded surface pore plate 17 of the revolving body part, setting an air exhaust pipeline and sealing by using a vacuum sealing bag 20. Connecting the air exhaust pipeline and a vacuum system, wherein the vacuum negative pressure resin is not less than 950 mbar.
Step 2: and (3) placing the drying tool in heating equipment, heating the heating equipment to 30-50 ℃, preserving heat for 12-24h, then heating the temperature to 75-95 ℃, preserving heat for 12-24h, after the temperature rise is finished, cooling the drying tool to room temperature at a speed of not more than 1 ℃/min, and taking out the drying tool.
And step 3: and tearing off the vacuum sealing bag 20, removing the air-permeable felt 21, disassembling the outer molded surface pore plate 17 of the revolving body workpiece, taking down the composite material revolving body workpiece 16, and maintaining the drying tool.
In summary, the profile accuracy error of the composite material dried in the free state in the prior art is about delta +/-6%, the profile size deformation is even larger for some thin plate parts and curved plate parts, the thickness tolerance is about +/-0.2 mm, and the deviation is larger for large-thickness parts. In embodiment 1-3, adopt the utility model discloses the combined material profile tolerance size precision error that frock and drying method obtained is less than delta 2%, and thickness tolerance is less than 0.1 mm.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (10)
1. The drying tool for the nanopore composite material is characterized by comprising an inner molded surface pore plate and at least one outer molded surface pore plate, wherein during drying, the inner molded surface pore plate and the outer molded surface pore plate are connected and locked and enclose a cavity, the nanopore composite material to be dried is positioned in the cavity, and two sides of the nanopore composite material are simultaneously attached to the inner molded surface pore plate and the outer molded surface pore plate.
2. The drying tool for the nanopore composite material according to claim 1, wherein the inner profile pore plate and the outer profile pore plate are matched with the shape of the nanopore composite material, and the shape of the nanopore composite material comprises a flat plate member, a curved plate member and a rotary body member.
3. The drying tool for the nanopore composite material according to claim 1, wherein holes with a diameter of 1-5mm and a distance of 1-10mm are distributed on the inner molded surface pore plate and/or the outer molded surface pore plate at the joint with the nanopore composite material.
4. The drying tool for the nano-pore composite material according to claim 1, wherein the inner profile pore plate and the outer profile pore plate are connected and locked by a locking bolt and a locking nut matched with the locking bolt.
5. The drying tool for the nano-porous composite material according to claim 4, wherein a pressure distributing plate and/or an elastic pressing device is arranged between the locking bolt and the outer profile hole plate.
6. The drying tool for the nanopore composite material according to claim 1, wherein an inner molded surface pore plate base is arranged below the inner molded surface pore plate, and the inner molded surface pore plate and the outer molded surface pore plate are both positioned above the inner molded surface pore plate base.
7. The drying tool for the nano-porous composite material according to claim 6, wherein an air-permeable felt is laid outside the outer profile pore plate, a vacuum sealing bag is arranged outside the air-permeable felt and connected with an air exhaust pipeline and a vacuum system, and a sealing strip for sealing is arranged between the inner profile pore plate base and the vacuum sealing bag.
8. The drying tool for the nano-pore composite material according to claim 1, wherein a thickness limiting block for preventing the nano-pore composite material from being excessively compressed is arranged between the inner profile pore plate and the outer profile pore plate.
9. The drying tool for the nano-porous composite material according to claim 8, wherein the outer profile pore plate is provided with a plurality of thickness limiting block grooves for positioning the thickness limiting blocks, and the thickness limiting blocks are arranged between the inner profile pore plate and the outer profile pore plate or between the outer profile pore plates during drying.
10. The drying tool for the nano-porous composite material according to claim 1, wherein a plurality of positioning grooves for positioning are formed in the edge of the inner profile plate, and positioning bosses matched with the positioning grooves are formed in the edge of the outer profile plate.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112059949A (en) * | 2020-08-17 | 2020-12-11 | 华东理工大学 | Drying tool for nano-pore composite material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112059949A (en) * | 2020-08-17 | 2020-12-11 | 华东理工大学 | Drying tool for nano-pore composite material |
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