Search

CN-122008440-A - Preparation method of composite net tire and application of composite net tire in preparation of prefabricated body

CN122008440ACN 122008440 ACN122008440 ACN 122008440ACN-122008440-A

Abstract

The invention discloses a preparation method of a composite net tire and application thereof in preparation of a preform, and belongs to the technical field of preform processing. According to the invention, continuous multidirectional long fiber structures are formed by arranging the winding layers with different winding angles, when external force is applied, the angle winding layers can decompose oblique force into axial and annular directions, the carbon cloth reinforcing layers and the axial wires are replaced to play a reinforcing role, the structural strength of the prefabricated body is improved, layering is effectively reduced, the processes of impregnating liquid resin, impregnating extrusion and re-impregnating liquid resin are introduced, the content and uniformity of resin in the net are improved, the semi-finished product of the prefabricated body is subjected to graded gradient high-temperature treatment, the gas release rate is controlled, carbon nano tubes are introduced into the prefabricated body, and the carbon nano tubes form interconnection micro channels for exhausting, so that the layering risk can be reduced.

Inventors

  • SHEN FUQIANG
  • ZHANG JING

Assignees

  • 安顿雷纳新材料(江苏)有限公司

Dates

Publication Date
20260512
Application Date
20260317

Claims (10)

  1. 1. A method for preparing a composite net tyre is characterized by comprising the specific preparation steps of realizing a liquid resin infiltration-liquid extrusion-liquid resin re-infiltration process on a net tyre prepared from short fibers through an infiltration extrusion device to form a net tyre containing resin, and spraying carbon nano tube dispersion liquid on the surface of the net tyre containing resin to form the composite net tyre.
  2. 2. The preparation method of the composite net tire according to claim 1, wherein the short fibers are one or more of carbon fibers, ceramic fibers and quartz fibers, the liquid resin is one or more of polysilazane, polycarbosilane, epoxy resin, phenolic resin and urea resin, the solid content of the carbon nanotube dispersion liquid is 2-8%, the length of the carbon nanotubes is 20-100 mu m, the outer diameter of the carbon nanotubes is 10-80nm, and the spraying density is 1.0-5.0g/m 2 .
  3. 3. The method for preparing the composite mesh tire according to claim 1, wherein the infiltration extrusion device comprises an infiltration frame (1), an infiltration tank (2), a power driving mechanism (4), a tensioning mechanism (7), a guide roller assembly (9), a press roller assembly (10), a carrier roller assembly (11), a press roller lifting adjusting mechanism (12), a carrier roller lifting adjusting mechanism (13), a guide roller lifting adjusting mechanism (14) and a supporting member (21); the infiltration tank (2) is correspondingly arranged at the bottom of the inner side of the infiltration frame (1) and is used for accommodating liquid resin; The device comprises a pressing roller assembly (10) and a carrier roller assembly (11), wherein the pressing roller assembly (10) and the carrier roller assembly (11) are arranged on an infiltration frame along the advancing direction of a net tire and are positioned above an infiltration groove (2), the pressing roller lifting adjusting mechanism (12) comprises two groups which are connected at two ends of the pressing roller assembly (10) in a transmission way and are correspondingly arranged at two ends of the infiltration frame (1) and are used for driving the pressing roller assembly (10) to vertically move so as to adjust a gap between the pressing roller assembly and the carrier roller assembly (11), and the carrier roller lifting adjusting mechanism (13) comprises two groups which are connected at two ends of the carrier roller assembly (11) in a transmission way and are correspondingly arranged at two ends of the infiltration frame (1) and are used for driving the carrier roller assembly (11) to vertically move so as to adjust the gap between the pressing roller assembly and the pressing roller assembly (10); The guide roller assembly (9) is correspondingly arranged at the feeding end of the carrier roller assembly (11) and is positioned above the infiltration tank (2), and two ends of the guide roller assembly are respectively connected to the infiltration frame, the support member (21) is correspondingly arranged below the guide roller assembly (9) in parallel, a gap for a web tire to pass through is formed between the support member (21) and the guide roller assembly (9), and the guide roller lifting adjusting mechanism (14) comprises two groups which are connected at two ends of the guide roller assembly (9) in a transmission manner and are correspondingly arranged at two ends of the infiltration frame (1) and are used for driving the guide roller assembly (9) to vertically move so as to adjust the interval between the guide roller assembly (9) and the support member (21); The power driving mechanism (4) is in transmission connection with the compression roller assembly (10), the carrier roller assembly (11) and the guide roller assembly (9) through the tensioning mechanism (7) and is used for driving the compression roller assembly (10), the carrier roller assembly (11) and the guide roller assembly (9) to rotate so as to draw the net tire to continuously advance.
  4. 4. A method for preparing a composite net tyre according to claim 3, characterized in that the press roller assembly (10), the carrier roller assembly (11) and the guide roller assembly (9) all comprise roller bodies and supporting shafts correspondingly arranged at two ends of the roller bodies, and the supporting shaft ends of the same side of the press roller assembly (10), the carrier roller assembly (11) and the guide roller assembly (9) are connected with a driving chain wheel (18).
  5. 5. The method for preparing the composite net tire according to claim 4, wherein two ends of the infiltration frame (1) are respectively provided with side baffles (16) on the upper side of the infiltration tank (2), each side baffle (16) is longitudinally provided with two guide grooves (17) in parallel along the width direction, and the guide grooves (17) of the two side baffles (16) are correspondingly arranged; The compression roller lifting adjusting mechanism (12), the carrier roller lifting adjusting mechanism (13) and the guide roller lifting adjusting mechanism (14) comprise sliding bearings which are slidably connected in the guide grooves (17) and adjusting screws which are arranged along the directions of the guide grooves (17), one ends of the adjusting screws are rotatably connected with the side walls of the sliding bearings, the other ends of the adjusting screws are in threaded connection with the infiltration frame (1), the rotating adjusting screws can drive the sliding bearings to vertically move along the guide grooves (17), and then the compression roller assembly (10), the carrier roller assembly (11) and the guide roller assembly (9) are driven to carry out lifting position adjustment.
  6. 6. A method of manufacturing a composite web tire according to claim 5, wherein the tensioning mechanism (7) comprises a tensioning bracket (71), a U-shaped seat (72), a tensioning sprocket (73) and a tensioning screw (74); the tensioning support (71) and the power driving mechanism (4) are correspondingly fixed at one end of the infiltration frame (1), the U-shaped seat (72) is connected to the tensioning support (71) through a tensioning screw rod (74), the tensioning chain wheel (73) is rotatably installed in the U-shaped seat (72), and the U-shaped seat (72) can be driven to slide back and forth along the tensioning support (71) through rotating the tensioning screw rod (74).
  7. 7. The preparation method of the composite mesh tire according to claim 6, wherein the power driving mechanism (4) comprises a driving motor and an adaptive transmission, a driving chain wheel (5) is connected to a power shaft end of the transmission, the driving chain wheel (5) is respectively in transmission connection with each driving chain wheel (18) and each tensioning chain wheel (73) through a transmission chain (6), and the driving motor can drive the guide roller assembly (9), the compression roller assembly (10) and the carrier roller assembly (11) to synchronously rotate through chain wheel and chain transmission after being started.
  8. 8. A method for manufacturing a composite net tire according to claim 3, wherein the supporting member (21) can be a supporting plate or a supporting roller, a drain valve (15) for draining the liquid resin remaining in the tank is provided at the bottom of the infiltration tank (2), and universal wheels (8) are provided at four corners of the bottom of the infiltration frame (1).
  9. 9. Use of a composite web tire according to claim 1 in a winding preform, characterized in that the use comprises the steps of: step S 1 , preparing a base layer, namely paving a composite net tire outside a processing die to form a net tire layer, circumferentially winding long fibers on the net tire layer along the circumferential direction of the processing die to form a circumferential winding layer, adjusting the wire winding angle, continuously winding the long fibers to form an angle winding layer, performing forward winding and reverse winding at the same and symmetrical angle to form an angle winding layer during angle winding, paving the composite net tire layer outside the angle winding layer, performing needling and hooking, and finally paving n layers (n is less than or equal to 1) of circumferential winding layers; Step S 2 , preparing an intermediate layer, namely continuously and alternately paving an angle winding layer and a composite net tire layer to form an angle winding layer-composite net tire layer-angle winding layer-composite net tire layer structure, wherein the composite net tire layer is paved and then is subjected to needling and hooking, and the needling and hooking are respectively formed by hooking after paving a single-layer net tire or hooking after paving a plurality of layers of net tires; Step S 3 , forming the prefabricated body, namely circularly repeating the step S 2 until the laying thickness reaches the preset thickness, and finally laying a circumferential winding layer and a composite net tire layer, and performing needling, hooking and fixing; s 4 , machining, namely cutting and demolding to obtain a prefabricated body semi-finished product with a required shape; Step S 5 , gradient high-temperature treatment, namely heating the semi-finished product of the preform to 200-350 ℃ at a speed of 1-3 ℃ per minute under a protective atmosphere, preserving heat for 3-10 hours, heating to 500-1000 ℃ at a speed of 5-10 ℃ per minute, and preserving heat for 1-5 hours to finish the high-temperature treatment to obtain the finished product of the preform; Wherein the long fiber in the step S 1 -S 3 is one or a plurality of combinations of carbon fiber, ceramic fiber and quartz fiber, the winding angle of circumferential winding is 90 degrees, the winding tension is 10-20N, the winding angle of angular winding is 15-75 degrees, the winding tension is 10-20N, the needling density is 15-35 needles/cm 2 , and the needling speed is 100-200 times/min.
  10. 10. The use of the composite web tire of claim 1 in a panel preform comprising the steps of alternately layering and needling a composite web tire with carbon cloth, the composite web tire being disposed between adjacent carbon cloth layers, repeating the layering and needling processes to form a multi-layered laminate panel preform.

Description

Preparation method of composite net tire and application of composite net tire in preparation of prefabricated body Technical Field The invention relates to a preform processing method, in particular to a preparation method of a composite net tire and application of the composite net tire in preparation of a preform. Background Thermal field structural members such as a supporting rod, a muffle, a heat-insulating cylinder and the like are required to be resistant to high temperature and high pressure, and the existing materials are generally graphite materials, but the cost of graphite raw materials is high, and the strength is limited, so that a carbon/carbon composite material is the best choice. At present, the domestic market of carbon/carbon materials is monopolized by foreign suppliers, and domestic fresh factories can prepare qualified support rods and heat preservation cylinders of carbon/carbon composite materials through a infiltration winding process, and the carbon/carbon composite materials are formed by the steps of resin liquid phase densification, high-temperature pyrolysis treatment and the like, and the winding process stacks carbon cloth, net tires and carbon fibers and is influenced by reactions such as uneven resin distribution, poor pressure concentration and weak interfacial bonding force of resin pyrolysis gas production, and the like, so that products often have layering phenomenon. Disclosure of Invention The invention aims to provide a preparation method of a composite net tire and application thereof in preparation of a preform, wherein the methods of impregnating resin, impregnating extrusion, re-impregnating liquid resin, introducing micro-channels and the like are adopted, so that the interlayer bonding strength of a net tire product is improved, and the layering phenomenon is remarkably reduced. According to the technical scheme, the preparation method of the composite net tire comprises the specific preparation steps of realizing a liquid resin infiltration-liquid extrusion-liquid resin re-infiltration process on the net tire prepared from the short fibers through an infiltration extrusion device to form a net tire containing resin, and spraying carbon nano tube dispersion liquid on the surface of the net tire containing resin to form the composite net tire. Preferably, the short fibers are one or more combinations of carbon fibers, ceramic fibers and quartz fibers, the liquid resin is one or more combinations of polysilazane, polycarbosilane, epoxy resin, phenolic resin and urea resin, the solid content of the carbon nanotube dispersion liquid is 2-8%, the length of the carbon nanotubes is 20-100 mu m, the outer diameter of the carbon nanotubes is 10-80nm, and the spraying density is 1.0-5.0g/m 2. Preferably, the infiltration extrusion device comprises an infiltration frame, an infiltration tank, a power driving mechanism, a tensioning mechanism, a guide roller assembly, a compression roller assembly, a carrier roller assembly, a compression roller lifting adjusting mechanism, a carrier roller lifting adjusting mechanism, a guide roller lifting adjusting mechanism and a supporting member; The infiltration tank is correspondingly arranged at the bottom of the inner side of the infiltration frame and is used for containing liquid resin; The device comprises a pressing roller assembly, a carrier roller assembly, a pressing roller lifting adjusting mechanism, a pressing roller assembly and a pressing roller assembly, wherein the pressing roller assembly and the carrier roller assembly are arranged on an infiltration frame along the advancing direction of a net tire and are positioned above an infiltration groove; The guide roller lifting adjusting mechanism comprises two groups which are connected to the two ends of the guide roller assembly in a transmission way and are correspondingly arranged at the two ends of the infiltration frame, and is used for driving the guide roller assembly to vertically move so as to adjust the interval between the guide roller assembly and the supporting member; the power driving mechanism is in transmission connection with the compression roller assembly, the carrier roller assembly and the guide roller assembly through the tensioning mechanism and is used for driving the compression roller assembly, the carrier roller assembly and the guide roller assembly to rotate so as to draw the net tire to continuously advance. Preferably, the compression roller assembly, the carrier roller assembly and the guide roller assembly all comprise roller bodies and supporting shafts correspondingly arranged at two ends of the roller bodies, and the supporting shaft ends of the same side of the compression roller assembly, the carrier roller assembly and the guide roller assembly are connected with driving sprockets. Preferably, two ends of the infiltration frame are respectively provided with a side baffle plate at the upper side of the infiltration groove, eac