Aramid fiber ceramic soft stab-resistant composite material and preparation method thereof

Abstract

The invention relates to the technical field of preparation of aramid fiber ceramic soft stab-resistant composite materials, in particular to an aramid fiber ceramic soft stab-resistant composite material and a preparation method thereof.The aramid fiber ceramic soft stab-resistant composite material comprises a preparation device, the preparation device comprises a supporting table, guide rollers are arranged on the front side and the rear side of the supporting table, and an electrostatic eliminator is bolted to the top of the guide roller on the front side; supporting structures are arranged on the two sides of the top of the supporting table, a coating structure is arranged between the opposite sides of the two supporting structures, and a conductive backing is arranged on the top of the supporting table; and the coating structure comprises a material storage box. According to the aramid fiber ceramic soft stab-resistant composite material and the preparation method thereof, through unique coating structure design, uniform coating and accurate control of mixed slurry on a flexible base material are achieved, the bonding strength of a coating and the flexible base material is improved, and the adaptability and flexibility of the process are enhanced; therefore, the overall performance of the aramid fiber ceramic soft stab-resistant composite material is improved.

Description

Technical Field

[0001] The invention relates to the technical field of preparation of aramid ceramic soft stab-proof composite materials, in particular to an aramid ceramic soft stab-proof composite material and a preparation method thereof. Background Art

[0002] As we all know, aramid fiber has the characteristics of high strength, high modulus, high temperature resistance, chemical corrosion resistance, etc. Its excellent tensile strength can effectively resist puncture force. Ceramic materials, such as alumina, silicon carbide and other ceramic powders, have high hardness and good wear resistance. They mainly play the role of enhancing the puncture resistance in composite materials. The two are combined together to form a material that has a certain degree of softness and is effectively puncture-resistant. It can be used to make protective clothing, protective gloves, etc., to improve the comfort and flexibility of the wearer.

[0003] In the existing aramid ceramic soft stab-proof composite material preparation technology, the traditional coating process has many technical defects. The existing technology has the following problems: from the perspective of coating uniformity, some traditional coating methods, such as simple scraper coating, are difficult to ensure the uniform distribution of the mixed slurry on the flexible substrate. Since the slurry mixed with aramid fiber, ceramic powder and binder solution has a certain complexity, its fluidity and viscosity may vary in different areas. Ordinary scraper coating cannot be adjusted in real time according to the characteristics of the slurry, which easily leads to uneven coating thickness, thereby affecting the consistency of the composite material's stab-proof performance; in terms of coating controllability, the traditional process also has obvious deficiencies. The existing technology is often difficult to accurately control the coating thickness and coating amount. For aramid ceramic soft stab-proof composite materials, accurate coating thickness and coating amount are crucial to the performance of the material. If the coating thickness is too thick, it will not only increase the cost of the material, but also may cause the material to be too thick and heavy, affecting its flexibility and wearing comfort; and if the coating thickness is too thin, it may not meet the stab-proof requirements. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides an aramid ceramic soft stab-proof composite material and a preparation method thereof, which has the advantages of achieving uniform coating and precise control of the mixed slurry on a flexible substrate through a unique coating structure design, improving the bonding strength between the coating and the flexible substrate, and enhancing the adaptability and flexibility of the process, thereby improving the overall performance of the aramid ceramic soft stab-proof composite material.

[0006] (II) Technical solution

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: an aramid ceramic soft stab-proof composite material, comprising a preparation device, the preparation device comprising a support platform, the front and rear sides of the support platform are both provided with guide rollers, the top of the front guide roller is bolted with an electrostatic eliminator, both sides of the top of the support platform are provided with support structures, a coating structure is provided between the opposite sides of the two support structures, and the top of the support platform is provided with a conductive backing;

[0008] The coating structure includes a material storage box, which is arranged between two opposite sides of the supporting structures, a coating roller is rotatably connected to the bottom of the storage box, and a flattening assembly is arranged at the bottom of the front side of the storage box, the coating roller is used in conjunction with the flattening assembly, and the flattening assembly is used in conjunction with the conductive backing;

[0009] The coating roller comprises an inner roller and an outer roller, the outer roller is sleeved on the surface of the inner roller, the inner roller and the outer roller are both rotatably connected to the bottom of the inside of the material storage box, and the bottoms of the inner roller and the outer roller are located outside the material storage box, a material guide hopper is arranged on the top of the inner wall of the material storage box, a plurality of material discharge pieces are arranged in a ring shape inside the outer roller, the bottom of the material guide hopper is arranged in an arc shape, and the material guide hopper is used in conjunction with the material discharge piece;

[0010] The leveling assembly includes a leveling scraper, a connecting plate is provided on the front side of the leveling scraper, and a movable plate is provided on the top of the connecting plate, a pressure spring is provided between the connecting plate and the opposite side of the movable plate, electric cylinders are bolted on both sides of the storage box, and the output end of the electric cylinder is rotatably connected to an adjustment plate, and the side of the adjustment plate close to the movable plate is rotatably connected to it, an electrode rod is provided at the bottom inside the leveling scraper, and the electrode rod is used in conjunction with a conductive backing.

[0011] By adopting the above technical scheme, by setting a coating roller, an intermittent and periodic discharge mode of the mixed slurry is achieved, which effectively avoids the problem of uneven coating caused by continuous outflow of the slurry, so that the mixed slurry can be evenly coated on the flexible substrate, greatly improving the uniformity of the composite material coating, laying the foundation for improving the consistency of the anti-stab performance, and with the rotation of the coating roller, the opening and closing timing and the discharge amount of the discharge piece are accurately controlled, further improving the uniformity and accuracy of the coating, which is conducive to the preparation of high-quality aramid ceramic soft stab-proof composite materials, and by setting a leveling component, the leveling scraper adopts a flexible design, which can better fit the surface of the flexible substrate and effectively level the coating after coating, and during the coating process, the leveling component can effectively reduce the viscosity of the slurry and enhance its fluidity, so that the mixed slurry formed by aramid fibers and ceramic particles can be more evenly dispersed during the coating process, and can also promote the intermolecular interaction between the coating and the substrate and improve the interface bonding force.

[0012] The present invention is further configured as follows: the discharging part includes a discharging hole, two discharging holes are arranged in a group and are distributed in a ring shape inside the outer roller, the inner wall of the outer roller is provided with a sealing plate in a ring shape, the sealing plate closes the discharging hole on the side thereof, a guide rod passes through the inside of the sealing plate, the guide rod is connected to the inner roller on the side thereof, a connecting rod is provided inside the discharging hole, the connecting rod is connected to the sealing plate on the side thereof, and an arc-shaped protrusion is provided on the other side of the connecting rod, a hollow plate is sleeved on the bottom of the surface of the connecting rod, and a reset spring is sleeved on the surface of the connecting rod, and the reset spring is respectively connected to the hollow plate and the sealing plate on the side thereof.

[0013] By adopting the above technical scheme, a discharge piece is set, and when the outer roller drives the arc-shaped protrusion to move and contact the flexible substrate, the arc-shaped protrusion will shrink to the inside of the discharge hole under the action of pressure, and push the connecting rod and the hollow plate to move, and at the same time, the reset spring will shrink. Under the push of the connecting rod, the sealing plate can move along the surface of the guide rod, so that the sealing plate releases the blockage of the discharge hole. Therefore, the mixed slurry between the inner roller and the outer roller can be discharged from the discharge hole to the flexible substrate, and when the arc-shaped protrusion is separated from the flexible substrate, the elasticity of the reset spring can be used to reset the arc-shaped protrusion and the sealing plate to close the discharge hole. Therefore, through the special design of the discharge piece, the mixed slurry can flow out from the outer roller in an intermittent and periodic manner, so as to achieve a uniform coating effect, avoid the problem of uneven coating caused by continuous outflow of slurry, and can accurately control the opening and closing of the discharge hole, further improving the uniformity and controllability of coating.

[0014] The present invention is further configured as follows: a guide port is opened inside the outer roller, and the guide port is connected to the discharge port on one side thereof; the outer roller and the inner roller are closed by an end cover structure, and an axial end is provided on one side of the end cover structure and is externally connected to a drive motor structure.

[0015] By adopting the above technical solution, the guide port is set to guide the mixed slurry, and the space between the outer roller and the inner roller is closed by the end cover structure to prevent slurry leakage. At the same time, an installation position is provided for the drive motor structure to ensure that the coating roller can rotate stably.

[0016] The present invention is further configured as follows: an arc-shaped contact piece is provided at the bottom of the guide hopper, and the arc-shaped contact piece is used in conjunction with the arc-shaped protrusion, and the arc-shaped protrusion corresponds to the arc-shaped contact piece one by one.

[0017] By adopting the above technical solution, an arc-shaped contact piece is set. When the arc-shaped protrusion is connected with the arc-shaped contact piece, the above steps can be repeated, so that the mixed slurry in the guide hopper can enter between the inner roller and the outer roller through the storage box, and the mixed slurry between the two can be replenished.

[0018] The present invention is further configured as follows: a fixing plate is bolted to the top of the storage box, and a pressure plate is provided at the bottom of the fixing plate, the pressure plate is slidably arranged inside the storage box, two contact springs are provided on the top of the pressure plate, a pressure plate is connected to the top of the contact spring, and a stud is bolted to the top of the pressure plate, and the stud is connected to the fixing plate through a nut.

[0019] By adopting the above technical solution, a certain pressure can be applied to the mixed slurry in the storage box through the combined structure of the fixed plate, pressure plate, contact spring, pressure plate and stud, so that the slurry can be smoothly added to the storage cavity formed between the inner roller and the outer roller, and by adjusting the coordination between the stud and the nut, the pressure of the pressure plate on the slurry can be adjusted to adapt to different coating requirements.

[0020] The present invention is further configured as follows: the smoothing scraper includes a flexible scraper, the front side of the flexible scraper is connected to the connecting plate, a groove is opened inside the flexible scraper, and the output shaft is rotatably connected inside the groove, the surface of the output shaft is sleeved with a plurality of cams, a plurality of positioning plates are arranged inside the groove, a striking rod passes through the interior of the positioning plate, and an arc block is arranged at one end of the striking rod, the arc block is used in conjunction with the cam, a matching block is in contact between the other end of the striking rod and the inner wall of the flexible scraper, an elastic member is sleeved on the surface of the striking rod, and the elastic member is respectively connected to the positioning plate and the arc block on one side thereof.

[0021] By adopting the above technical solution, a flat scraper is set up, and one end of the output shaft is driven to rotate through an external driving device, which can synchronously drive multiple cams to rotate. The cam structure can periodically push the arc block and the striking rod to move, and cause collision between the striking rod and the matching block, so that the flexible scraper can generate a certain vibration. The vibration can effectively reduce the viscosity of the slurry and enhance its fluidity, so that the mixed slurry formed by aramid fibers and ceramic particles can be more evenly dispersed during the coating process. In addition, it can also promote the intermolecular interaction between the coating and the substrate and improve the interfacial bonding strength.

[0022] The present invention is further configured as follows: positioning blocks are bolted on both sides of the bottom of the storage box, and one side of the positioning block is rotatably connected to a limiting plate, and a side of the limiting plate close to the connecting plate is rotatably connected to it.

[0023] By adopting the above technical solution, by setting the positioning block and the limit plate, the moving track of the connecting plate can be restricted so that it can move stably.

[0024] The present invention is further configured as follows: a support frame is bolted between the tops of the two support structures, and the top of the support frame is rotatably connected to two screw sleeves, the internal threads of the screw sleeves are penetrated by a screw rod, and the bottom of the screw rod is connected to the fixing plate.

[0025] By adopting the above technical solution, by setting up the support frame, the screw sleeve and the screw for use in combination, the height of the screw can be adjusted by rotating the screw sleeve, and then the position of the fixed plate can be adjusted to achieve the adjustment of the height of the coating structure, thereby improving the flexibility and adaptability of the coating.

[0026] The present invention is further configured as follows: a transmission wheel is sleeved on the surface of the screw sleeve, and a transmission belt is wound between the insides of the two transmission wheels; a driven gear is sleeved on the bottom of the left screw sleeve surface, and the right side of the driven gear is meshedly connected with a driving gear shaft.

[0027] By adopting the above technical solution, the synchronous rotation between the two screw sleeves can be achieved by setting a transmission wheel and a transmission belt, and the coordinated use of the driven gear and the driving gear shaft provides power for the rotation of the screw sleeve, which facilitates the operator to control the screw sleeve and improves the operating convenience of the equipment.

[0028] A method for preparing an aramid ceramic soft stab-proof composite material comprises the following steps:

[0029] S1. The aramid fiber, ceramic powder and binder solution are placed in a mixing device and mixed to form a uniform mixed slurry;

[0030] S2. The mixed slurry is pumped into a storage box, and then the flexible substrate is pulled onto the support table by the guide roller on the rear side, and the mixed slurry is applied to the flexible substrate in an intermittent and periodic manner by the coating roller, and rolled on the flexible substrate;

[0031] S3. When the flexible substrate after preliminary roller coating passes through the leveling component, the coating thickness of the mixed slurry is controlled by the leveling component to make it flat and form a good bond between it and the flexible substrate;

[0032] S4. Finally, the aramid ceramic soft stab-proof composite material is obtained after being led out by the front guide roller and dried and cured.

[0033] (III) Beneficial effects

[0034] Compared with the prior art, the present invention provides an aramid ceramic soft stab-proof composite material and a preparation method thereof, which has the following beneficial effects:

[0035] The aramid ceramic soft stab-proof composite material realizes an intermittent and periodic discharge mode of the mixed slurry by setting a coating roller, effectively avoiding the problem of uneven coating caused by continuous outflow of the slurry, so that the mixed slurry can be evenly coated on the flexible substrate, greatly improving the uniformity of the composite material coating, laying a foundation for improving the consistency of the stab-proof performance, and with the rotation of the coating roller, the opening and closing timing and the discharge amount of the discharge piece are accurately controlled, further improving the uniformity and accuracy of the coating, which is conducive to the preparation of high-quality aramid ceramic soft stab-proof composite materials, and by setting a leveling component, the leveling scraper adopts a flexible design, which can better fit the surface of the flexible substrate and effectively level the coating after coating, and during the coating process, the leveling component can effectively reduce the viscosity of the slurry and enhance its fluidity, so that the mixed slurry formed by the aramid fiber and the ceramic particles can be more evenly dispersed during the coating process, and can also promote the intermolecular interaction between the coating and the substrate and improve the interface bonding force. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 is a schematic diagram of the coating structure in the present invention;

[0038] Figure 3 It is a schematic diagram of the connection between the material storage box and the coating roller in the present invention;

[0039] Figure 4 It is a schematic diagram of the connection between the discharging member and the outer roller in the present invention;

[0040] Figure 5 is a schematic diagram of a leveling component in the present invention;

[0041] Figure 6 It is a schematic diagram of the connection between the leveling scraper and the connecting plate in the present invention;

[0042] Figure 7 It is a schematic diagram of the connection between the pressure plate and the fixing plate in the present invention;

[0043] Figure 8 It is a schematic diagram of the connection between the fixing plate and the supporting frame in the present invention;

[0044] Fig. 9 It is a schematic diagram of the process of preparing the aramid ceramic soft stab-proof composite material of the present invention.

[0045] In the figure: 1, support platform; 2, guide roller; 3, static eliminator; 4, support structure; 5, coating structure; 6, storage box; 7, coating roller; 71, inner roller; 72, outer roller; 73, guide hopper; 74, discharge piece; 741, discharge hole; 742, sealing plate; 743, guide rod; 744, connecting rod; 745, arc-shaped protrusion; 746, hollow plate; 747, reset spring; 8, leveling component; 81, leveling scraper; 811, flexible scraper; 812, output shaft; 813, cam; 814, positioning plate; 815 , striking rod; 816, arc block; 817, matching block; 818, elastic member; 82, connecting plate; 83, movable plate; 84, pressure spring; 85, electric cylinder; 86, adjusting plate; 87, electrode rod; 9, conductive backing; 10, arc contact piece; 11, fixing plate; 12, pressure plate; 13, contact spring; 14, pressure plate; 15, stud; 16, positioning block; 17, limiting plate; 18, supporting frame; 19, screw sleeve; 20, screw; 21, transmission wheel; 22, transmission belt; 23, driven gear; 24, driving gear shaft. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Example 1

[0048] See also Figure 1-8 , an aramid ceramic soft stab-proof composite material, including a preparation device, the preparation device includes a support platform 1, the front and rear sides of the support platform 1 are both provided with guide rollers 2, the top of the front guide roller 2 is bolted with an electrostatic eliminator 3, both sides of the top of the support platform 1 are provided with support structures 4, a coating structure 5 is provided between the opposite sides of the two support structures 4, and a conductive backing 9 is provided on the top of the support platform 1;

[0049] The coating structure 5 includes a material storage box 6, which is arranged between the two opposite sides of the supporting structures 4. The bottom of the material storage box 6 is rotatably connected to a coating roller 7, and the bottom of the front side of the material storage box 6 is provided with a leveling component 8, the coating roller 7 is used in conjunction with the leveling component 8, and the leveling component 8 is used in conjunction with a conductive backing 9;

[0050] The coating roller 7 includes an inner roller 71 and an outer roller 72. The outer roller 72 is sleeved on the surface of the inner roller 71. The inner roller 71 and the outer roller 72 are both rotatably connected to the bottom of the storage box 6. The bottoms of the inner roller 71 and the outer roller 72 are located outside the storage box 6. A guide hopper 73 is provided on the top of the inner wall of the storage box 6. A plurality of discharge members 74 are provided in an annular shape inside the outer roller 72. The bottom of the guide hopper 73 is provided in an arc shape. The guide hopper 73 is used in conjunction with the discharge member 74. By providing the coating roller 7. An intermittent and periodic discharge mode of the mixed slurry is realized, which effectively avoids the problem of uneven coating caused by continuous outflow of the slurry, enables the mixed slurry to be evenly coated on the flexible substrate, greatly improves the uniformity of the composite material coating, and lays a foundation for improving the consistency of the anti-stab performance. In addition, as the coating roller 7 rotates, the opening and closing timing and the discharge amount of the discharge member 74 are accurately controlled, which further improves the uniformity and accuracy of the coating, and is conducive to the preparation of high-quality aramid ceramic soft anti-stab composite materials.

[0051] The discharging member 74 comprises a discharging hole 741, and the two discharging holes 741 are arranged in a group and are distributed in an annular shape inside the outer roller 72. The inner wall of the outer roller 72 is provided with a sealing plate 742 in an annular shape. The sealing plate 742 closes the discharging hole 741 on one side thereof. A guide rod 743 runs through the sealing plate 742, and the guide rod 743 is connected to the inner roller 71 on one side thereof. A connecting rod 744 is provided inside the discharging hole 741, and the connecting rod 744 is connected to the sealing plate 742 on one side thereof. An arc-shaped protrusion 745 is provided on the other side of the connecting rod 744. A hollow plate 746 is sleeved on the bottom of the surface of the connecting rod 744, and a return spring 747 is sleeved on the surface of the connecting rod 744. The return spring 747 is connected to the hollow plate 746 and the sealing plate 742 on one side thereof respectively. By providing the discharging member 74, when the outer roller 72 drives the arc-shaped protrusion 745 to move to contact the flexible substrate, under the action of pressure, the outer roller 72 drives the arc-shaped protrusion 745 to move to contact the flexible substrate. The arc-shaped protrusion 745 will shrink to the inside of the discharge hole 741, and push the connecting rod 744 and the hollow plate 746 to move, and at the same time, the reset spring 747 will shrink. Under the push of the connecting rod 744, the sealing plate 742 can move along the surface of the guide rod 743, so that the sealing plate 742 releases the blockage of the discharge hole 741. Therefore, the mixed slurry between the inner roller 71 and the outer roller 72 can be discharged from the discharge hole 741 to the flexible substrate. When the arc-shaped protrusion 745 is separated from the flexible substrate, the elasticity of the reset spring 747 can be used to reset the arc-shaped protrusion 745 and the sealing plate 742 to close the discharge hole 741. Therefore, through the special design of the discharge member 74, the mixed slurry can flow out from the outer roller 72 in an intermittent and periodic manner, so as to achieve a uniform coating effect, avoid the problem of uneven coating caused by continuous outflow of slurry, and can accurately control the opening and closing of the discharge hole 741, further improving the uniformity and controllability of the coating.

[0052] Among them, a guide port is opened inside the outer roller 72, and the guide hole is connected to the discharge hole 741 on one side thereof. The outer roller 72 and the inner roller 71 are closed by an end cover structure, and an axial end is provided on one side of the end cover structure and is externally connected to a drive motor structure. By setting the guide port, the mixed slurry can be guided, and the space between the outer roller 72 and the inner roller 71 is closed by the end cover structure to prevent slurry leakage, and at the same time, an installation position is provided for the drive motor structure to ensure that the coating roller 7 can rotate stably.

[0053] Among them, an arc-shaped contact piece 10 is provided at the bottom of the guide hopper 73, and the arc-shaped contact piece 10 is used in conjunction with the arc-shaped protrusion 745, and the arc-shaped protrusion 745 corresponds to the arc-shaped contact piece 10 one by one. By setting the arc-shaped contact piece 10, when the arc-shaped protrusion 745 is connected with the arc-shaped contact piece 10, the above steps can be repeated, so that the mixed slurry in the guide hopper 73 can pass through the storage box 6 into between the inner roller 71 and the outer roller 72, and the mixed slurry between the two can be replenished.

[0054] Among them, a fixing plate 11 is bolted to the top of the storage box 6, and a pressure plate 12 is arranged at the bottom of the fixing plate 11. The pressure plate 12 is slidably arranged inside the storage box 6. Two contact springs 13 are arranged on the top of the pressure plate 12. A pressure plate 14 is connected to the top of the contact spring 13, and a stud 15 is bolted to the top of the pressure plate 14. The stud 15 is connected to the fixing plate 11 through a nut. Through the combined structure of the fixing plate 11, the pressure plate 12, the contact spring 13, the pressure plate 14 and the stud 15, a certain pressure can be applied to the mixed slurry in the storage box 6, so that the slurry can be smoothly added to the storage cavity formed between the inner roller 71 and the outer roller 72, and by adjusting the cooperation between the stud 15 and the nut, the pressure of the pressure plate 14 on the slurry can be adjusted to adapt to different coating requirements.

[0055] Among them, a support frame 18 is bolted between the tops of the two support structures 4, and the top of the support frame 18 is rotatably connected to two screw sleeves 19, the internal threads of the screw sleeves 19 are penetrated by a screw rod 20, and the bottom of the screw rod 20 is connected to the fixed plate 11. By setting the support frame 18, the screw sleeve 19 and the screw rod 20 for coordinated use, the height of the screw rod 20 can be adjusted by rotating the screw sleeve 19, and then the position of the fixed plate 11 can be adjusted, thereby realizing the adjustment of the height of the coating structure 5 and improving the flexibility and adaptability of the coating.

[0056] Among them, a transmission wheel 21 is sleeved on the surface of the screw sleeve 19, and a transmission belt 22 is wound between the insides of the two transmission wheels 21, a driven gear 23 is sleeved on the bottom of the surface of the left screw sleeve 19, and the right side of the driven gear 23 is meshed and connected with a driving gear shaft 24. By setting the transmission wheel 21 and the transmission belt 22, the synchronous rotation between the two screw sleeves 19 can be achieved, and the coordinated use of the driven gear 23 and the driving gear shaft 24 provides power for the rotation of the screw sleeve 19, which is convenient for the operator to control the screw sleeve 19 and improves the operating convenience of the equipment.

[0057] Working principle of this embodiment: the height of the coating structure 5 is adjusted according to the coating requirements, and the left screw sleeve 19 can be driven to rotate by the cooperation of the driven gear 23 and the driving gear shaft 24, and the screw sleeves 19 on both sides can be rotated synchronously by the transmission wheel 21 and the transmission belt 22, and the height of the storage box 6 and the coating roller 7 is adjusted by the thread cooperation of the screw rod 20 and the screw sleeve 19, and then the mixed slurry is pumped into the storage box 6, and the coating roller 7 is driven to rotate by an external driving device. When the outer roller 72 drives the arc-shaped protrusion 745 to move until it contacts the arc-shaped contact piece 10, the arc-shaped protrusion 745 will shrink to the inside of the discharge hole 741 under the action of pressure, and push the connecting rod 744 and the hollow plate 746 to move, and at the same time, the reset spring 747 will shrink, and the sealing plate 742 can be pushed along the connection rod 744. The surface of the guide rod 743 moves, so that the sealing plate 742 releases the blockage of the discharge hole 741. Therefore, the mixed slurry in the guide hopper 73 can enter between the inner roller 71 and the outer roller 72 through the storage box 6, and the mixed slurry between the two can be replenished. When the arc-shaped protrusion 745 is separated from the arc-shaped contact piece 10, the elasticity of the reset spring 747 can be used to reset the arc-shaped protrusion 745 and the sealing plate 742 to close the discharge hole 741. When the outer roller 72 drives the arc-shaped protrusion 745 to move to contact the flexible substrate, the above-mentioned movement steps of the arc-shaped protrusion 745 and the sealing plate 742 are repeated, so that the mixed slurry between the inner roller 71 and the outer roller 72 can be discharged from the discharge hole 741 to the flexible substrate, so that the mixed slurry can flow out from the outer roller 72 in an intermittent and periodic manner to achieve a uniform coating operation.

[0058] Example 2

[0059] refer to Figure 5-6A preparation device for an aramid ceramic soft stab-proof composite material further includes a leveling component 8, wherein the leveling component 8 includes a leveling scraper 81, a connecting plate 82 is provided on the front side of the leveling scraper 81, and a movable plate 83 is provided on the top of the connecting plate 82, and a pressing spring 84 is provided between the connecting plate 82 and the opposite side of the movable plate 83, and an electric cylinder 85 is bolted to both sides of the storage box 6, and an adjusting plate 86 is rotatably connected to the output end of the electric cylinder 85, and the adjusting plate 86 is rotatably connected to the movable plate 83 on one side thereof, and the inside of the leveling scraper 81 An electrode rod 87 is provided at the bottom, and the electrode rod 87 is used in conjunction with the conductive backing 9. By providing a leveling component 8, the leveling scraper 81 adopts a flexible design, which can better fit the surface of the flexible substrate and effectively level the coating after coating. In addition, during the coating process, the leveling component 8 can effectively reduce the viscosity of the slurry and enhance its fluidity, so that the mixed slurry formed by the aramid fibers and the ceramic particles can be more evenly dispersed during the coating process. In addition, it can also promote the intermolecular interaction between the coating and the substrate and improve the interface bonding force.

[0060] The flattening scraper 81 comprises a flexible scraper 811, the front side of which is connected to the connecting plate 82, a slot is provided inside the flexible scraper 811, and the output shaft 812 is rotatably connected inside the slot, a plurality of cams 813 are sleeved on the surface of the output shaft 812, a plurality of positioning plates 814 are provided inside the slot, a striking rod 815 is passed through the interior of the positioning plate 814, and an arc block 816 is provided at one end of the striking rod 815, and the arc block 816 is used in conjunction with the cam 813, and a matching block 817 is in contact between the other end of the striking rod 815 and the inner wall of the flexible scraper 811, and an elastic member 818 is sleeved on the surface of the striking rod 815, and the elastic member 818 is close to the positioning plate 814. One side of the plate 814 and the arc block 816 are connected to the two respectively. By setting a flat scraper 81 and driving one end of the output shaft 812 to rotate through an external driving device, multiple cams 813 can be driven to rotate synchronously. The cam 813 structure can periodically push the arc block 816 and the striking rod 815 to move, and cause a collision between the striking rod 815 and the matching block 817, so that the flexible scraper 811 can generate a certain vibration. The vibration can effectively reduce the viscosity of the slurry and enhance its fluidity, so that the mixed slurry formed by aramid fibers and ceramic particles can be more evenly dispersed during the coating process. In addition, it can also promote the intermolecular interaction between the coating and the substrate and improve the interfacial bonding force.

[0061] Among them, positioning blocks 16 are bolted on both sides of the bottom of the storage box 6, and one side of the positioning block 16 is rotatably connected to a limiting plate 17, and the side of the limiting plate 17 close to the connecting plate 82 is rotatably connected to it. By setting the positioning block 16 and the limiting plate 17, the moving trajectory of the connecting plate 82 can be limited to enable it to move stably.

[0062] Working principle of this embodiment: the pressure of the flat scraper 81 can be adjusted according to the coating requirements. The adjustment plate 86 can be pushed by the electric cylinder 85, thereby driving the movable plate 83. The initial position and pressure of the flat scraper 81 can be adjusted to meet different coating requirements. At the same time, the positioning blocks 16 bolted on both sides of the bottom of the storage box 6 and the limit plates 17 connected in rotation limit the moving track of the connecting plate 82 to ensure the stable movement of the flat scraper 81. During the coating process, the electrode rod 87 can be used to generate an electrostatic field on the flexible substrate, and the electrostatic field can also attract The external drive device drives the output shaft 812 in the internal slot of the flexible scraper 811 to rotate, and several cams 813 sleeved on the surface of the output shaft 812 rotate synchronously. As the cam 813 rotates, the arc block 816 and the striking rod 815 are periodically pushed to move. The striking rod 815 passes through the interior of the positioning plate 814, and the arc block 816 at one end cooperates with the cam 813, and the other end cooperates with the flexible scraper. The blade 811 contacts the matching block 817 on the inner wall. When the cam 813 pushes the arc block 816, the striking rod 815 moves and collides with the matching block 817. Since the surface of the striking rod 815 is sleeved with an elastic member 818, the elastic member 818 is deformed during the collision, providing a buffering force for the resetting of the striking rod 815, so that the flexible scraper 811 generates a certain vibration. This vibration can effectively reduce the viscosity of the slurry and enhance its fluidity, so that the mixed slurry formed by the aramid fiber and the ceramic particles can be more evenly dispersed during the coating process. While vibrating, the flexible scraper 811 can better fit the surface of the flexible substrate with its flexible design, and smooth the coating after the initial coating by the coating roller 7. During the smoothing process, the vibration of the flexible scraper 811 promotes the intermolecular interaction between the coating and the substrate, improves the interface bonding force, makes the coating more evenly and firmly adhere to the flexible substrate, and improves the overall quality of the composite material. Finally, the electrostatic field on the flexible substrate is eliminated by the static eliminator 3 to complete the coating operation of the mixed slurry.

[0063] like Fig. 9 As shown, the present invention also provides a method for preparing an aramid ceramic soft stab-proof composite material, comprising the following steps:

[0064] S1. The aramid fiber, ceramic powder and binder solution are placed in a mixing device and mixed to form a uniform mixed slurry;

[0065] S2. The mixed slurry is pumped into the storage box 6, and then the flexible substrate is pulled onto the support table 1 by the guide roller 2 on the rear side, and the mixed slurry is applied to the flexible substrate in an intermittent and periodic manner by the coating roller 7, and rolled on it;

[0066] S3. After the preliminary roller coating of the flexible substrate passes through the leveling component 8, the leveling component 8 controls the coating thickness of the mixed slurry to make it flat and form a good bond with the flexible substrate;

[0067] S4. Finally, the aramid ceramic soft stab-proof composite material is obtained after being led out from the front guide roller 2 for drying and curing treatment and then cut and trimmed.

[0068] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make non-creative modifications to the present embodiment as needed. Although the embodiments of the present invention have been shown and described, it is understandable to those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An aramid ceramic soft stab-proof composite material, including a preparation device, characterized in that: The preparation device comprises a support platform (1), wherein the front and rear sides of the support platform (1) are both provided with guide rollers (2), the top of the front guide roller (2) is bolted with an electrostatic eliminator (3), support structures (4) are both provided on both sides of the top of the support platform (1), a coating structure (5) is provided between the opposite sides of the two support structures (4), and a conductive backing (9) is provided on the top of the support platform (1); The coating structure (5) comprises a material storage box (6), the material storage box (6) is arranged between two opposite sides of the two supporting structures (4), the bottom of the interior of the material storage box (6) is rotatably connected to a coating roller (7), and the bottom of the front side of the material storage box (6) is provided with a leveling component (8), the coating roller (7) and the leveling component (8) are used in conjunction with each other, and the leveling component (8) is used in conjunction with a conductive backing (9); The coating roller (7) comprises an inner roller (71) and an outer roller (72), wherein the outer roller (72) is sleeved on the surface of the inner roller (71), and the inner roller (71) and the outer roller (72) are both rotatably connected to the bottom of the inside of the material storage box (6), and the bottoms of the inner roller (71) and the outer roller (72) are located outside the material storage box (6), and a guide hopper (73) is arranged on the top of the inner wall of the material storage box (6), and a plurality of discharge pieces (74) are arranged in an annular shape inside the outer roller (72), and the bottom of the guide hopper (73) is arranged in an arc shape, and the guide hopper (73) and the discharge piece (74) are used in conjunction with each other; The leveling assembly (8) comprises a leveling scraper (81), a connecting plate (82) is arranged on the front side of the leveling scraper (81), and a movable plate (83) is arranged on the top of the connecting plate (82), a pressure spring (84) is arranged between the connecting plate (82) and the movable plate (83) on opposite sides, both sides of the material storage box (6) are bolted with electric cylinders (85), and the output end of the electric cylinder (85) is rotatably connected to an adjustment plate (86), and the side of the adjustment plate (86) close to the movable plate (83) is rotatably connected thereto, and an electrode rod (87) is arranged at the bottom inside the leveling scraper (81), and the electrode rod (87) is used in conjunction with a conductive backing (9).

2. The aramid ceramic soft stab-proof composite material according to claim 1, characterized in that: The discharge member (74) comprises a discharge hole (741), wherein two discharge holes (741) are arranged in a group and are distributed in an annular shape inside the outer roller (72), and a sealing plate (742) is arranged in an annular shape on the inner wall of the outer roller (72), and the sealing plate (742) closes the discharge hole (741) on one side thereof, and a guide rod (743) passes through the interior of the sealing plate (742), and the guide rod (743) is connected to the inner roller (71) on one side thereof, and the discharge hole (741) is provided in a closed manner. A connecting rod (744) is provided inside the sealing plate (742), and the connecting rod (744) is connected to the sealing plate (742) at one side thereof, and an arc-shaped protrusion (745) is provided on the other side of the connecting rod (744), a hollow plate (746) is sleeved on the bottom of the surface of the connecting rod (744), and a return spring (747) is sleeved on the surface of the connecting rod (744), and the return spring (747) is connected to the hollow plate (746) and the sealing plate (742) at one side thereof.

3. The aramid ceramic soft stab-proof composite material according to claim 2, characterized in that: The outer roller (72) is provided with a flow guide port inside, and the side of the flow guide port close to the discharge port (741) is connected thereto, the outer roller (72) and the inner roller (71) are sealed by an end cover structure, and a shaft end is provided on one side of the end cover structure and is externally connected to a drive motor structure.

4. The aramid ceramic soft stab-proof composite material according to claim 2, characterized in that: The bottom of the guide hopper (73) is provided with an arc-shaped contact piece (10), and the arc-shaped contact piece (10) is used in conjunction with the arc-shaped protrusion (745), and the arc-shaped protrusion (745) corresponds to the arc-shaped contact piece (10) one by one.

5. The aramid ceramic soft stab-proof composite material according to claim 1, characterized in that: A fixing plate (11) is bolted to the top of the storage box (6), and a pressure plate (12) is arranged at the bottom of the fixing plate (11). The pressure plate (12) is slidably arranged inside the storage box (6). Two contact springs (13) are arranged on the top of the pressure plate (12). A pressure plate (14) is connected to the top of the contact spring (13), and a stud (15) is bolted to the top of the pressure plate (14). The stud (15) is connected to the fixing plate (11) via a nut.

6. The aramid ceramic soft stab-proof composite material according to claim 1, characterized in that: The flattening scraper (81) comprises a flexible scraper (811), the front side of the flexible scraper (811) is connected to the connecting plate (82), a slot is provided inside the flexible scraper (811), and an output shaft (812) is rotatably connected inside the slot, a plurality of cams (813) are sleeved on the surface of the output shaft (812), a plurality of positioning plates (814) are provided inside the slot, and a striking rod (814) is penetrated inside the positioning plate (814) 815), and an arc block (816) is provided at one end of the striking rod (815), and the arc block (816) is used in conjunction with the cam (813), and a matching block (817) is in contact between the other end of the striking rod (815) and the inner wall of the flexible scraper (811), and an elastic member (818) is sleeved on the surface of the striking rod (815), and the elastic member (818) is connected to the positioning plate (814) and the arc block (816) on one side thereof.

7. The aramid ceramic soft stab-proof composite material according to claim 1, characterized in that: Positioning blocks (16) are bolted to both sides of the bottom of the storage box (6), and one side of the positioning block (16) is rotatably connected to a limiting plate (17), and the side of the limiting plate (17) close to the connecting plate (82) is rotatably connected to it.

8. The aramid ceramic soft stab-proof composite material according to claim 5, characterized in that: A support frame (18) is bolted between the tops of the two support structures (4), and the top of the support frame (18) is rotatably connected to two screw sleeves (19), the internal threads of the screw sleeves (19) are penetrated by a screw rod (20), and the bottom of the screw rod (20) is connected to the fixing plate (11).

9. The aramid ceramic soft stab-proof composite material according to claim 8, characterized in that: A transmission wheel (21) is sleeved on the surface of the screw sleeve (19), and a transmission belt (22) is wound between the two transmission wheels (21). A driven gear (23) is sleeved on the bottom of the surface of the left screw sleeve (19), and the right side of the driven gear (23) is meshedly connected with a driving gear shaft (24).

10. A method for preparing an aramid ceramic soft stab-proof composite material according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. The aramid fiber, ceramic powder and binder solution are placed in a mixing device and mixed to form a uniform mixed slurry; S2. The mixed slurry is pumped into a storage box (6), and the flexible substrate is pulled onto the support table (1) by the guide roller (2) at the rear side, and the mixed slurry is intermittently and periodically coated on the flexible substrate by the coating roller (7), and rolled; S3. When the flexible substrate after preliminary roller coating passes through the flattening assembly (8), the coating thickness of the mixed slurry is controlled by the flattening assembly (8) to make it flat and form a good bond between it and the flexible substrate; S4. Finally, the composite material is led out from the front guide roller (2) for drying and curing, and then cut and trimmed to obtain the aramid ceramic soft stab-proof composite material.

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