阅读说明：本技术 一种碳化硼防弹陶瓷插板的生产工艺及配方 (Production process and formula of boron carbide bulletproof ceramic plugboard ) 是由 许兴康 于 2020-12-29 设计创作，主要内容包括：本发明公开了一种碳化硼防弹陶瓷插板的生产工艺及配方,包括以下步骤：步骤一,原料混合；步骤二,泥段炼制；步骤三,真空精炼；步骤四,插板成型；步骤五,坯体烘干；步骤六,真空脱脂；其中在上述步骤一中,将工厂自制的超细低杂质B4C粉加入数种配方辅料,在V型混料机干法混合,再将混合干料过高速粉碎机进一步相互分散混均；再将上述充分打散混均的干粉加入捏入机并按比例加入含有塑化剂；该发明选用超细粉体后采用此工艺,可以保持各点一致性好；解决干压成型时装填料不均匀会造成板各点性能不匀；本工艺简单易操作；还采用双曲面防弹插板成型采用双曲面托模,用上磨轻压即可塑性成型,并同时可压出表面毛糙感。(The invention discloses a production process and a formula of a boron carbide bulletproof ceramic inserting plate, which comprises the following steps: step one, mixing raw materials; step two, refining the mud section; step three, vacuum refining; step four, insert plate forming; step five, drying the green body; step six, vacuum degreasing; in the first step, adding a plurality of formula auxiliary materials into superfine low-impurity B4C powder self-made by a factory, mixing in a V-shaped mixer in a dry method, and further mutually dispersing and uniformly mixing the mixed dry materials through a high-speed pulverizer; adding the fully dispersed and uniformly mixed dry powder into a kneading machine and adding the plasticizer into the mixture according to a proportion; the process is adopted after the superfine powder is selected, so that the consistency of each point can be kept to be good; solving the problem that the uneven performance of each point of the plate is caused by uneven filling material during dry pressing forming; the process is simple and easy to operate; the double-curved-surface bulletproof flashboard is also formed by adopting a double-curved-surface supporting die, can be formed plastically by upper grinding and light pressing, and can be pressed to form rough surface.)

1. A production process of a boron carbide bulletproof ceramic insert plate comprises the following steps: step one, mixing raw materials; step two, refining the mud section; step three, vacuum refining; step four, insert plate forming; step five, drying the green body; step six, vacuum degreasing; the method is characterized in that:

in the first step, adding a plurality of formula auxiliary materials into superfine low-impurity B4C powder self-made by a factory, mixing in a V-shaped mixer in a dry method, and further mutually dispersing and uniformly mixing the mixed dry materials through a high-speed pulverizer; adding the fully dispersed and uniformly mixed dry powder into a kneading machine, adding water containing a plasticizer, a dispersing agent and a binder according to a proportion, kneading for a certain time, and discharging;

in the second step, after discharging, adding the material into a pug mill to perform multiple-cycle pug section refining, and performing plastic package on the pug section to prevent water from losing and aging for several days, so that all components and water in the pug section are more uniform;

in the third step, the mud segment is subjected to vacuum refining for multiple times; then adding the qualified mud section obtained by refining into a pipe extruding machine; extruding the product to obtain a product with the required thickness and the required arc section according to the size of the product, and cutting the product;

in the fourth step, a plastic molding process is adopted, namely, the main and auxiliary materials are added with specific plasticizer, dispersant, binder and the like, extruded into a required shape by the traditional pugging and extrusion processes, and cut, shaped and prepared into a blank;

in the fifth step, the blank body and the supporting die are placed into a drying room, and the blank body and the supporting die are dried at a low speed according to the required process;

in the sixth step, the dried blank has better strength due to the existence of the binder, and each sheet is placed on the same hyperboloid graphite bracket according to the requirement and then is placed into an electric furnace for a pressureless sintering process; vacuumizing to degrease according to a heating curve, and filling Ar gas; then heating to 2100 deg.C, keeping the temperature for 2hr, and naturally cooling.

2. The formula of the boron carbide bulletproof ceramic insert plate is characterized in that: the formula comprises the following components: the composite material comprises superfine boron carbide, titanium diboride, titanium carbide, carbon nano tubes, graphene, carbon and yttrium oxide, wherein the weight parts of the components are as follows: 57-98.1% of superfine boron carbide, 1-20% of titanium diboride, 0.5-10% of titanium carbide, 0.1-3% of carbon nano tube, 0.1-3% of graphene, 0.1-5% of carbon and 0.1-2% of yttrium oxide.

3. The production process of the boron carbide bulletproof ceramic insert plate according to claim 1, wherein the production process comprises the following steps: in the second step, the pug mill comprises a pug mill main body (1), a feeding hopper (2), a crushing assembly (3), a base (4), a moving assembly (5), a first motor (31), a driving shaft (32), a driven shaft (33), a first gear (34), a rotating hole (35), a threaded crushing wheel (36), a sliding groove (51), a rotating groove (52), a second motor (53), a rotating shaft (54), a second gear (55), a toothed belt (56), a third gear (57), a sliding rail (58) and a rack (59), a feeding funnel (2) is connected on the outer wall of the top end of the pugging machine main body (1) in a run-through way, a crushing component (3) is fixed on the inner wall of one side of the feeding funnel (2), a base (4) is welded and fixed on the outer wall of the bottom end of the pugging machine main body (1), a moving component (5) is fixed on the inner wall of the bottom end of the base (4);

the crushing component (3) comprises a first motor (31), a driving shaft (32), a driven shaft (33), a first gear (34), a rotating hole (35) and a thread crushing wheel (36), the first motor (31) is embedded and installed on the inner wall of the top end of the pugging machine main body (1), the driving shaft (32) is connected to the inner wall of one side of the feeding hopper (2) in a rotating mode, one end of an output shaft of the first motor (31) is fixedly connected to the outer wall of one end of the driving shaft (32), the driven shaft (33) is connected to the inner wall between the pugging machine main body (1) and the feeding hopper (2) in a symmetrical rotating mode, the rotating hole (35) is formed in the inner wall of one side of the feeding hopper (2) corresponding to the driving shaft (32) and the driven shaft (33), the first gear (34) is fixedly connected to the outer wall of one side of the driving shaft (32) and the driven shaft (33), and, the outer walls of the driving shaft (32) and the driven shaft (33) which are positioned in the feeding funnel (2) are fixedly connected with a thread crushing wheel (36);

the movable assembly (5) comprises a sliding groove (51), a rotating groove (52), a second motor (53), a rotating shaft (54), a second gear (55), a toothed belt (56), a third gear (57), a sliding rail (58) and a rack (59), the sliding rail (58) is fixedly installed outside the bottom end of the base (4), the sliding groove (51) is formed in the inner wall of the bottom end of the base (4) corresponding to the sliding rail (58), the rotating groove (52) is formed in the inner wall between the sliding grooves (51), the rotating shaft (54) is symmetrically and rotatably connected to the inner wall of the top end of the rotating groove (52), the second motor (53) is embedded in the inner wall of the top end of the rotating groove (52), one end of an output shaft of the second motor (53) is fixedly connected to the outer wall of the rotating shaft (54), the third gear (57) is fixedly connected to the outer wall of the bottom end of, the sliding rail is characterized in that a rack (59) is welded and fixed on the outer wall of one side of the sliding rail (58), one side of the rack (59) is meshed and connected with the outer wall of one side of the third gear (57), the rotating shaft (54) is located on the outer wall above the third gear (57) and is fixedly connected with a second gear (55), and a toothed belt (56) is meshed and connected on the outer wall between the second gears (55).

4. The production process of the boron carbide bulletproof ceramic insert plate according to claim 1, wherein the production process comprises the following steps: in the fourth step, one curved surface is mainly formed during extrusion, and then the product which is just cut off and extruded is placed on the corresponding double curved surface supporting die and then the upper die is slightly pressed.

5. The production process of the boron carbide bulletproof ceramic insert plate according to claim 1, wherein the production process comprises the following steps: and step five, drying at a low temperature, then feeding into a graphite resistance furnace, heating according to a set heating curve, degreasing, sintering and cooling to finally obtain the product.

6. The formulation of a boron carbide ballistic ceramic insert plate according to claim 2, wherein: the B4C powder is D50: 0.5 mu and a specific surface area of >15m 2/g.

7. The formulation of a boron carbide ballistic ceramic insert plate according to claim 2, wherein: the binder, the plasticizer, the lubricant and the dispersant are respectively compounded by 0.5-10% of water-soluble phenolic resin, 0.1-1% of polyvinyl alcohol, 0.5-5% of hydroxymethyl cellulose, 0.5-5% of yellow dextrin, 0.1-1% of acrylate, tung oil and glycerol, and a small amount of organic solvent such as alcohol can be added.

8. The production process of the boron carbide bulletproof ceramic insert plate according to claim 3, wherein the production process comprises the following steps: the second motor (53) is a forward and reverse rotating motor.

Technical Field

The invention relates to the technical field of plugboards, in particular to a production process and a formula of a boron carbide bulletproof ceramic plugboard.

Background

Boron carbide has excellent properties such as light weight and high hardness, and is gradually used for body armor and bulletproof armor materials in recent years; at present, high-quality boron carbide ceramic is sintered by hot pressing; the boron carbide adopting the pressureless sintering process has larger quality difference due to the influence of various process factors.

Disclosure of Invention

The invention aims to provide a production process and a formula of a boron carbide bulletproof ceramic insert plate, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: a production process of a boron carbide bulletproof ceramic insert plate comprises the following steps: step one, mixing raw materials; step two, refining the mud section; step three, vacuum refining; step four, insert plate forming; step five, drying the green body; step six, vacuum degreasing;

in the first step, adding a plurality of formula auxiliary materials into superfine low-impurity B4C powder self-made by a factory, mixing in a V-shaped mixer in a dry method, and further mutually dispersing and uniformly mixing the mixed dry materials through a high-speed pulverizer; adding the fully dispersed and uniformly mixed dry powder into a kneading machine, adding water containing a plasticizer, a dispersing agent and a binder according to a proportion, kneading for a certain time, and discharging;

in the second step, after discharging, adding the material into a pug mill to perform multiple-cycle pug section refining, and performing plastic package on the pug section to prevent water from losing and aging for several days, so that all components and water in the pug section are more uniform;

in the third step, the mud segment is subjected to vacuum refining for multiple times; then adding the qualified mud section obtained by refining into a pipe extruding machine; extruding the product to obtain a product with the required thickness and the required arc section according to the size of the product, and cutting the product;

in the fourth step, a plastic molding process is adopted, namely, the main and auxiliary materials are added with specific plasticizer, dispersant, binder and the like, extruded into a required shape by the traditional pugging and extrusion processes, and cut, shaped and prepared into a blank;

in the fifth step, the blank body and the supporting die are placed into a drying room, and the blank body and the supporting die are dried at a low speed according to the required process;

in the sixth step, the dried blank has better strength due to the existence of the binder, and each sheet is placed on the same hyperboloid graphite bracket according to the requirement and then is placed into an electric furnace for a pressureless sintering process; vacuumizing to degrease according to a heating curve, and filling Ar gas; then heating to 2100 deg.C, keeping the temperature for 2hr, and naturally cooling.

The formula of the boron carbide bulletproof ceramic insert plate comprises the following components: the composite material comprises superfine boron carbide, titanium diboride, titanium carbide, carbon nano tubes, graphene, carbon and yttrium oxide, wherein the weight parts of the components are as follows: 57-98.1% of superfine boron carbide, 1-20% of titanium diboride, 0.5-10% of titanium carbide, 0.1-3% of carbon nano tube, 0.1-3% of graphene, 0.1-5% of carbon and 0.1-2% of yttrium oxide.

As a still further scheme of the invention: in the second step, the pug mill comprises a pug mill main body, a feeding hopper, a crushing assembly, a base, a moving assembly, a first motor, a driving shaft, a driven shaft, a first gear, a rotating hole, a thread crushing wheel, a sliding chute, a rotating groove, a second motor, a rotating shaft, a second gear, a toothed belt, a third gear, a sliding rail and a rack, wherein the feeding hopper is connected to the outer wall of the top end of the pug mill main body in a through manner, the crushing assembly is fixed to the inner wall of one side of the feeding hopper, the base is fixedly welded to the outer wall of the bottom end of the pug mill main body, and the moving assembly is fixed to the inner wall of the bottom end of the base;

the crushing assembly comprises a first motor, a driving shaft, a driven shaft, a first gear, a rotating hole and a thread crushing wheel, the first motor is embedded and installed on the inner wall of the top end of the pugging machine main body, the driving shaft is rotatably connected to the inner wall of one side of the feeding hopper, one end of an output shaft of the first motor is fixedly connected to the outer wall of one end of the driving shaft, the driven shaft is symmetrically and rotatably connected to the inner wall between the pugging machine main body and the feeding hopper, the rotating hole is formed in the inner wall of one side of the feeding hopper corresponding to the driving shaft and the driven shaft, the first gear is fixedly connected to the outer wall of one side of the driving shaft and the driven shaft, one side of the first gear is meshed with each other, and the thread crushing wheel is fixedly connected to the;

the moving component comprises a sliding groove, a rotating groove, a second motor, a rotating shaft, a second gear, a toothed belt, a third gear, a sliding rail and a rack, a slide rail is fixedly arranged outside the bottom end of the base, a slide groove is arranged on the inner wall of the bottom end of the base corresponding to the slide rail, a rotating groove is arranged on the inner wall between the sliding grooves, rotating shafts are symmetrically and rotatably connected on the inner wall of the top end of the rotating groove, a second motor is embedded and installed on the inner wall of the top end of the rotating groove, one end of an output shaft of the second motor is fixedly connected to the outer wall of the rotating shaft, the outer wall of the bottom end of the rotating shaft is fixedly connected with a third gear, a rack is fixedly welded on the outer wall of one side of the sliding rail, and one side of the rack is meshed and connected with the outer wall of one side of the third gear, the outer wall of the rotating shaft above the third gear is fixedly connected with a second gear, and the outer wall between the second gears is meshed and connected with a toothed belt.

As a still further scheme of the invention: in the fourth step, one curved surface is mainly formed during extrusion, and then the product which is just cut off and extruded is placed on the corresponding double curved surface supporting die and then the upper die is slightly pressed.

As a still further scheme of the invention: and step five, drying at a low temperature, then feeding into a graphite resistance furnace, heating according to a set heating curve, degreasing, sintering and cooling to finally obtain the product.

As a still further scheme of the invention: the B4C powder is D50: 0.5 mu and a specific surface area of >15m 2/g.

As a still further scheme of the invention: the binder, the plasticizer, the lubricant and the dispersant are respectively compounded by 0.5-10% of water-soluble phenolic resin, 0.1-1% of polyvinyl alcohol, 0.5-5% of hydroxymethyl cellulose, 0.5-5% of yellow dextrin, 0.1-1% of acrylate, tung oil and glycerol, and a small amount of organic solvent such as alcohol can be added.

As a still further scheme of the invention: the second motor is a positive and negative rotation motor.

Compared with the prior art, the invention has the following beneficial effects: according to the production process and the formula of the boron carbide bulletproof ceramic inserting plate, the viscosity of the boron carbide bulletproof ceramic inserting plate is increased after the powder is superfine, and plastic forming can be realized by adding a small amount of organic additives; the superfine powder adopts a pressing process due to the fact that the surface area is greatly increased, even if the pressure is greatly increased, the biscuit is difficult to press to the required density, and the extruded biscuit is about 5% higher than that of isostatic pressing after being dried according to the same formula in the experiment; therefore, although the traditional ceramic forming process of mud refining and extrusion is adopted in the process, the process is adopted after the superfine powder is selected, so that the advantages are fully exerted, and the consistency of each point is good; solving the problem that the uneven performance of each point of the plate is caused by uneven filling material during dry pressing forming; the process is simple and easy to operate; the double-curved-surface bulletproof flashboard is also formed by adopting a double-curved-surface supporting die, can be formed plastically by upper grinding and light pressing, can be pressed to form rough surface, and is beneficial to the compound bonding of a ceramic board and a high-density PE board in the later period.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a process flow diagram of the present invention;

FIG. 2 is a schematic overall perspective view of the present invention;

FIG. 3 is an enlarged view of the structure of the area A in FIG. 2 according to the present invention;

FIG. 4 is a front view cut-away schematic of the present invention;

FIG. 5 is an enlarged view of the structure of the area B in FIG. 4 according to the present invention;

in the figure: 1. a pug mill main body; 2. a feeding hopper; 3. a crushing assembly; 4. a base; 5. a moving assembly; 31. a first motor; 32. a drive shaft; 33. a driven shaft; 34. a first gear; 35. rotating the hole; 36. a thread breaker wheel; 51. a chute; 52. a rotating groove; 53. a second motor; 54. a rotating shaft; 55. a second gear; 56. a toothed belt; 57. a third gear; 58. a slide rail; 59. a rack.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a production process of a boron carbide bulletproof ceramic insert plate comprises the following steps: step one, mixing raw materials; step two, refining the mud section; step three, vacuum refining; step four, insert plate forming; step five, drying the green body; step six, vacuum degreasing;

in the first step, adding a plurality of formula auxiliary materials into superfine low-impurity B4C powder self-made by a factory, mixing in a V-shaped mixer in a dry method, and further mutually dispersing and uniformly mixing the mixed dry materials through a high-speed pulverizer; adding the fully dispersed and uniformly mixed dry powder into a kneading machine, adding water containing a plasticizer, a dispersing agent and a binder according to a proportion, kneading for a certain time, and discharging;

in the second step, after discharging, adding the material into a pug mill to perform multiple-cycle pug refining on a pug segment, and plastically packaging the pug segment to prevent water from losing and aging for several days, so that all components and water in the pug segment are more uniform, wherein in the second step, the pug mill comprises a pug mill main body 1, a feeding funnel 2, a crushing component 3, a base 4 and a moving component 5, the feeding funnel 2 is connected on the outer wall of the top end of the pug mill main body 1 in a through way, the crushing component 3 is fixed on the inner wall of one side of the feeding funnel 2, the base 4 is fixedly welded on the outer wall of the bottom end of the pug mill main body 1, and the moving component 5 is fixed on the inner wall of the bottom end of; the crushing component 3 comprises a first motor 31, a driving shaft 32, a driven shaft 33, a first gear 34, a rotating hole 35 and a thread crushing wheel 36, the first motor 31 is embedded and installed on the inner wall of the top end of the pugging machine main body 1, the driving shaft 32 is rotatably connected to the inner wall of one side of the feeding funnel 2, one end of an output shaft of the first motor 31 is fixedly connected to the outer wall of one end of the driving shaft 32, the driven shaft 33 is symmetrically and rotatably connected to the inner wall between the pugging machine main body 1 and the feeding funnel 2, the rotating hole 35 is formed in the inner wall of one side of the feeding funnel 2 corresponding to the driving shaft 32 and the driven shaft 33, the first gear 34 is fixedly connected to the outer wall of one side of the driving shaft 32 and the driven shaft 33, one side of the first gear 34 is mutually engaged, and the thread crushing wheel 36 is fixedly connected; the moving assembly 5 comprises a sliding groove 51, a rotating groove 52, a second motor 53, a rotating shaft 54, a second gear 55, a toothed belt 56, a third gear 57, a sliding rail 58 and a rack 59, the sliding rail 58 is fixedly installed at the outer part of the bottom end of the base 4, the sliding groove 51 is formed on the inner wall of the bottom end of the base 4 corresponding to the sliding rail 58, the rotating groove 52 is formed on the inner wall between the sliding grooves 51, the rotating shaft 54 is symmetrically and rotatably connected to the inner wall of the top end of the rotating groove 52, the second motor 53 is embedded and installed on the inner wall of the top end of the rotating groove 52, one end of the output shaft of the second motor 53 is fixedly connected to the outer wall of the rotating shaft 54, the third gear 57 is fixedly connected to the outer wall of the bottom end of the rotating shaft 54, the rack 59 is fixedly welded to the outer wall of one side of the sliding rail 58, one side of the rack 59 is engaged, a toothed belt 56 is meshed and connected on the outer wall between the second gears 55; the second motor 53 is a forward and reverse rotation motor, and makes the rotation shaft 54 perform forward and reverse rotation movement; when the pugging machine works, firstly, mixed mud segments are thrown into a feeding hopper 2, at the moment, a first motor 31 is started to enable a driving shaft 32 to rotate, then two driven shafts 33 rotate along a rotating shaft 54 under the action of a first gear 34, so that a thread crushing wheel 36 rotates, harder mud segments are crushed, then after pugging is finished, a second motor 53 in a rotating groove 52 is started to enable the rotating shaft 54 to rotate, then a third gear 57 rotates under the matching of a second gear 55 and a toothed belt 56, then a sliding groove 51 on a base 4 moves to a specified position along a sliding rail 58 under the action of a rack 59, and then the pugging mud segments are discharged;

in the third step, the mud segment is subjected to vacuum refining for multiple times; then adding the qualified mud section obtained by refining into a pipe extruding machine; extruding the product to obtain a product with the required thickness and the required arc section according to the size of the product, and cutting the product;

in the fourth step, a molding process is adopted, namely, specific plasticizer, dispersant, binder and the like are added into the main and auxiliary materials, the materials are extruded into required shapes by the traditional pugging and extrusion processes, and blanks are cut, shaped and prepared;

in the fifth step, the green body and the supporting die are placed into a drying room and dried at a low speed according to the required process, and after drying at a low temperature, the green body enters a graphite resistance furnace to be heated, degreased, sintered and cooled according to a set heating curve to finally obtain a product;

in the sixth step, the dried blank has better strength due to the existence of the binder, and each sheet is placed on the same hyperboloid graphite bracket according to the requirement and then is placed into an electric furnace for a pressureless sintering process; vacuumizing to degrease according to a heating curve, and filling Ar gas; then heating to 2100 deg.C, keeping the temperature for 2hr, and naturally cooling.

The formula of the boron carbide bulletproof ceramic insert plate comprises the following components: the composite material comprises superfine boron carbide, titanium diboride, titanium carbide, carbon nano tubes, graphene, carbon and yttrium oxide, wherein the weight parts of the components are as follows: 57-98.1% of superfine boron carbide, 1-20% of titanium diboride, 0.5-10% of titanium carbide, 0.1-3% of carbon nano tube, 0.1-3% of graphene, 0.1-5% of carbon and 0.1-2% of yttrium oxide;

the B4C powder is D50: 0.5 mu of submicron ultrafine powder with the specific surface area of more than 15m 2/g;

the binder, the plasticizer, the lubricant and the dispersant are respectively 0.5-10% of water-soluble phenolic resin, 0.1-1% of polyvinyl alcohol, 0.5-5% of hydroxymethyl cellulose, 0.5-5% of yellow dextrin, 0.1-1% of acrylate, tung oil and glycerol, and a small amount of organic solvent such as alcohol can be added.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.