WO2023060685A1 - 一种多曲面防弹头盔成型方法 - Google Patents

一种多曲面防弹头盔成型方法 Download PDF

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Publication number
WO2023060685A1
WO2023060685A1 PCT/CN2021/130934 CN2021130934W WO2023060685A1 WO 2023060685 A1 WO2023060685 A1 WO 2023060685A1 CN 2021130934 W CN2021130934 W CN 2021130934W WO 2023060685 A1 WO2023060685 A1 WO 2023060685A1
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WIPO (PCT)
Prior art keywords
helmet
mold
helmet shell
tailor
small
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PCT/CN2021/130934
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English (en)
French (fr)
Inventor
于银
冯波
党艳利
党晓波
杨建恒
谢瑞广
康湧涛
习建军
韩建平
赵文浩
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西安康本材料有限公司
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Publication of WO2023060685A1 publication Critical patent/WO2023060685A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16—Cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/545—Perforating, cutting or machining during or after moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
    • B29C73/24—Apparatus or accessories not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H1/00—Personal protection gear
    • F41H1/04—Protection helmets

Definitions

  • the invention belongs to the technical field of bulletproof protective equipment materials, and in particular relates to a multi-curved surface bulletproof helmet forming method.
  • Bulletproof helmets are a kind of equipment that can absorb and dissipate the energy of warheads, prevent penetration, reduce blunt injuries and effectively protect the head. They are widely used in high-risk industries such as police and armed police. special protection.
  • military helmets are generally composed of three parts: the shell, the lining and the suspension assembly.
  • the shell is made of high-strength and tough materials. It absorbs and slows down the impact of bullets and shrapnel through material deformation, preventing the shell fragments from hurting the head; the lining plays the role of breathability, sweat absorption, warmth and shock absorption, etc. Function; the suspension assembly separates the shell from the liner, which can be adjusted and adapted to soldiers with different head shapes.
  • the materials used for helmet shells include special steel, glass fiber reinforced plastics, ceramics, reinforced plastics, phenolic resin fibers, nylon fibers, composite fibers, etc., and their performance is getting better and better, and their protection capabilities are getting stronger and stronger.
  • helmets were called helmets, first armors, pockets, etc., and were made of rattan, leather, or copper and iron.
  • the armies of many countries were still using iron helmets.
  • helmets were made of steel, called steel helmets.
  • steel helmets continued to be used, and improvements were made in materials and shapes.
  • the armies of countries such as the United States, Britain, Spain, and Israel have begun to equip steel-free helmets.
  • This kind of helmet is made of high-strength synthetic fibers such as Kevlar, which is lighter than a steel helmet and has better protection performance.
  • Some countries have developed a helmet gun with both offensive and defensive functions, which can protect and launch shellless bullets.
  • the Chinese People's Liberation Army developed tank work caps with shock absorption and communication functions in the 1950s.
  • multifunctional armored helmets and infantry helmets with stronger bulletproof capabilities were developed and equipped.
  • a non-metal paratrooper helmet with anti-kill function was developed.
  • the suspension system usually uses cushioning pads to obtain good shock absorption and cushioning performance, preventing paratroopers from head or neck injuries when landing.
  • aramid composite helmets Existing bulletproof helmets are classified according to raw materials, and lightweight composite helmets are divided into two categories: aramid composite helmets and PE composite helmets.
  • PE composite helmets are cheap, they have high shell thickness, large dynamic dents, and poor high-temperature resistance, and are mainly suitable for medium and low-end customers; aramid composite helmets have low shell thickness and small dynamic dents. , high temperature resistance, excellent rigidity and other advantages, but the price is high, suitable for medium and high-end customers.
  • the aramid helmet is mainly composed of multi-layer aramid woven fabric sheets, which are formed by high temperature and high pressure composite pressing. Under the condition that the quality of military helmets is limited, the main factors affecting the bulletproof performance and anti-fragmentation performance of aramid helmets are mainly: the type of aramid fiber, the weaving process of aramid woven fabric, and the dipping of aramid woven fabric. Process and later cutting process of aramid sheet, pressing temperature, pressing pressure, holding time, etc. Among them, the stacking structure of the aramid sheet in the aramid helmet is closely related to the bulletproof performance and anti-fragmentation performance of the finished helmet shell. The stacking uniformity and number of layers of the aramid sheet in the helmet shell determine a random point on the helmet shell. The relative number of layers directly determines the bulletproof performance and anti-fragmentation performance of the bulletproof helmet.
  • the technical problem to be solved by the present invention is to provide a method for forming a multi-curved bulletproof helmet for the above-mentioned deficiencies in the prior art.
  • This molding method prepares 1# large noodles, 2# small noodles, 3# small noodles and 4# large noodles by lofting and cutting, and then carries out helmet laying and a series of pressing and subsequent processing to obtain low-cost, low-weight High-performance multi-curved bulletproof helmet, the anti-fragment performance and ballistic performance of the prepared bulletproof helmet have high stability and consistency at a random point of the helmet shell, and have excellent safety, meeting the requirements of military-grade bulletproof helmets.
  • the technical solution adopted in the present invention is: a method for forming a multi-curved bulletproof helmet, which is characterized in that the method comprises the following steps:
  • Step 1 Lofting and cutting: cut the single-sided phenolic resin glue prepreg to obtain 1# large surface, 2# small surface and 3# small surface; the 1# large surface, 2# small surface and 3# small surface
  • the surfaces are all circular, and there are four openings evenly distributed on the 1# large surface, and the openings include A tailor and B tailor, and the A tailor is located on two mutually perpendicular diameters of the 1# large surface.
  • the outer side extends toward the center of the circle and the length is less than the radius.
  • the tailor B is located on the counterclockwise side of the tailor A, extends from the outer side of the circle to the tailor A and has a certain angle with the tailor A; the double-sided phenolic resin glue prepreg is cut, Obtain 4# big face; The shape and opening of described 4# big face are all identical with 1# big face;
  • Step 2 laying the helmet: the 1# large face obtained in step 1, the 2# small face, the 3# small face and the 4# large face are carried out on the helmet laying mold and preliminary finalized to obtain the helmet shell;
  • the process of helmet and preliminary finalization is as follows: every 2 layers of 1# large surface and 1 layer of 3# small surface are laid on the male mold of the helmet mold, and a total of 10 layers of 1# large surface and 5 layers of 3# small surface are laid.
  • Step 3 trimming: trimming the helmet shell obtained in step 2 to obtain the cut helmet shell;
  • Step 4 open mold preheating: put the cut helmet shell obtained in step 3 into the hydraulic press open mold for preheating to obtain a preheated helmet shell;
  • Step 5 open the mold for pre-cooling and shaping: put the preheated helmet shell obtained in step 4 into the open mold of the hydraulic press for pre-cooling and shaping, and obtain the pre-cooling and shaping helmet shell;
  • Step 6 Heating the closed mold: Put the pre-cooled and shaped helmet shell obtained in step 5 into the closed mold of the hydraulic press for sealing and heating to obtain a closed and heated helmet shell;
  • Step 7 closed mold cold setting: put the closed heated helmet shell obtained in step 6 into the open mold of the hydraulic press for closed cold setting to obtain a closed cold shaped helmet shell;
  • Step 8 drilling: drilling the closed cold-shaped helmet shell obtained in step 7 to obtain the drilled helmet shell;
  • Step 9 internal and external surface treatment: cleaning the internal and external surfaces of the drilled helmet shell obtained in step 8 to obtain a clean helmet shell;
  • Adhesive edge sealing strip stick the edge sealing strip on the edge of the clean helmet shell obtained in step 9, and then polish it to obtain the edge sealing helmet shell;
  • Step 11 spraying polyurea: spraying polyurea on the surface of the edge-sealed helmet shell obtained in step 10 to obtain a sprayed helmet shell;
  • Step 12 Assembling the suspension system and the cap cover: the sprayed helmet shell obtained in step 11 is installed with the suspension system and the cap cover to obtain a multi-curved bulletproof helmet.
  • the present invention cuts by adopting single-sided phenolic resin glue prepreg to obtain 1# large face, 2# small face and 3# small face, and adopts single-side impregnated phenolic resin glue prepreg to control single piece weight and Adhesive content, in the heating state, the glue melts and solidifies, and the adjacent two layers of prepreg are bonded, and the prepreg is cut by double-sided impregnation with phenolic resin glue to obtain a 4# large surface, which is double-sided impregnated with phenolic resin Adhesive prepreg ensures the bonding between the outermost layer and the inner layer and the smooth surface of the helmet.
  • the cutting order should be based on the small pieces first, and the cutting should be strictly according to the line to prevent the knife from running and the secant line is not uniform, and the cut pieces should be combined with layer numbers according to the technical requirements;
  • the single-side impregnated phenolic resin glue prepreg of the present invention is a plain weave fabric woven from para-aramid filament 840D and grade 629T by using an arrow loom, with a width of 1400mm and a roll length of 100m.
  • the warp density of the cloth is 146-150 threads/10cm
  • the weft density is 146-150 threads/10cm
  • the warp breaking strength is not less than 12000N/50mm
  • the weft breaking strength is not less than 12000N/50mm
  • the elongation at break in the weft direction is not more than 4%
  • the variation coefficient of the warp breaking strength is not more than 7, and the variation coefficient of the weft breaking strength is not more than 7
  • the loom uses para-aramid filament 1500D, grade 629T as the raw material to weave plain weave fabric with a width of 1400mm and a roll length of 100m.
  • the breaking strength in the warp direction is not less than 14500N/50mm
  • the breaking strength in the weft direction is not less than 15000N/50mm
  • the elongation at break in the warp direction is not more than 8.5%
  • the elongation at break in the weft direction is not more than 8.5%.
  • the variation coefficient of warp breaking strength is not more than 7, and the variation coefficient of weft breaking strength is not more than 7.
  • the surface of the plain weave fabric is smooth and clean, without obvious fluffing, the warp and weft yarns are arranged neatly and evenly, there is no missing yarn, no oil stains and obvious sundries. The selvedge is complete;
  • the basic structure of the bulletproof helmet is formed by the 1# large surface
  • the top of the bulletproof helmet is reinforced by the 3# and 2# small surfaces
  • the bonding of the outermost layer and the inner layer is guaranteed by the 4# large surface
  • the surface of the helmet is smooth.
  • all surfaces are guaranteed to be concentric, which ensures the strength of each surface of the bulletproof helmet.
  • each layer should be overlapped in order. The overlapping layers are tight, firm and not loose.
  • each layer and each piece When lapping, it is carried out in the order of layers, and it is not allowed to be reversed.
  • the opening between each layer should be staggered at a rotation angle of 45° between the beginning of the next piece and the opening of the previous piece to prevent the occurrence of through seams. It should be well connected with the end of the previous piece, and each layer should be bonded firmly and smoothly, without wrinkles or loose delamination.
  • the pasted helmet body should be handled with care, and it should be covered and protected from light and moisture to prevent the helmet body from scattering.
  • the 0°/45° sheet material laying structure The anti-ballistic performance is good, and the fiber orthogonal structure of the composite structure can be guaranteed, and the fibers are parallel to each other and straightly arranged during the composite process of the helmet; this arrangement ensures the holding effect of fiber buckling and interweaving in the fabric structure,
  • This structure realizes that the two-way prepreg fabric structure is more conducive to the axial propagation of the shock wave generated during the impact of the bullet, so that the number of effective load-bearing fibers can be increased, which is more conducive to the diffusion speed of the shock wave and improves the bulletproof of the bulletproof helmet. performance;
  • the present invention cuts off the redundant part of the pre-pressed product according to the line by trimming the edge, and cuts the flash along the edge line with straight knife electric scissors on the laid helmet shell.
  • the edge is straight, the edge is free from deviation, gap, virtual edge and missing layer and less flesh.
  • the weight of the helmet shell before trimming is 1.3kg-1.4kg, and the weight of the helmet shell after trimming is 1.0kg-1.1kg;
  • the present invention pre-heats the helmet shell in the mold by opening the mold, pre-curing, pre-cooling and shaping the helmet shell in the mold through the open mold, prevents wrinkles, and heats the closed mold to make 1#
  • the glue on the large surface, 2# small surface, 3# small surface and 4# large surface completely melts and penetrates into the inside of the fiber, and deflates several times to remove air bubbles and avoid air bubbles inside or outside the helmet shell. Affect the anti-ballistic performance.
  • the final shape of the helmet shell is completed.
  • the obtained bulletproof helmet is guaranteed to have a symmetrical appearance and a full helmet body, which avoids wrinkles, peeling, and blistering of the helmet shell;
  • the present invention drills holes according to the technology with a hand electric drill, sets the punching tooling mold on the outside of the helmet body, and drills 4 through holes with a diameter of 5.5mm in the lower part of the helmet body for installing the suspension system.
  • the through holes are generally 4 pieces, two burrs on the left and right sides are cut clean, and the left and right holes are symmetrical;
  • the invention cleans the inner and outer surfaces of the helmet shell by using alcohol cotton yarn to remove fine impurities and other pollutants on the surface of the helmet shell, so as to ensure that the inner and outer surfaces of the helmet shell are free of oil, water, silicone oil and other paint mist, etc., so that the surface Clean, so as not to affect the painting effect behind, and use a high-pressure air gun to blow off the attached dirt on the inner and outer surfaces of the helmet shell;
  • 101 glue is coated on both sides of the edge of the helmet shell, the glue is evenly applied, and then the neoprene rubber strip is bonded.
  • the butadiene rubber strip is smooth, and the transition between the straight line and the arc is natural and smooth.
  • the two ends of the strip overlap at the edge of the helmet shell by 10mm. Afterwards, sand the mouth of the adhesive strip and the strip with sandpaper. There is no scratch or overflow on the surface. 1. Clean up the flashing. After polishing, use a high-pressure air gun to blow off the attached dirt on the inner and outer surfaces of the helmet shell. After bonding, there will be no cracking, virtual sticking, wrinkles, deviation, virtual edges and unevenness.
  • the helmet shell is firmly bonded, the straight arc transition is natural, and the width is consistent;
  • the present invention installs the suspension system in the helmet shell by using 4 pieces of M5 inner hexagonal screws, the front and rear positions of the suspension system are consistent with the helmet shell and the nuts are tightened, and then the cap is set on the surface of the helmet shell, and the cap is smooth on the surface of the helmet shell, without folds to obtain a multi-curved bulletproof helmet, and the obtained bulletproof helmet is inspected and packaged after passing the inspection.
  • the bulletproof helmet prepared by the present invention meets the requirements in GJB5115A-2012 "Safety Technical Performance Requirements for Military Bulletproof Helmet”. Max, then put the product certificate, product maintenance manual, and desiccant into the helmet together, wrap it with copy paper and put it in a polyethylene plastic bag, then seal it, and put it sideways into the inner packing box in a stack of 5 . Put the two inner packing boxes into the outer packing box, and put the "Package Inspection List" in the upper part of the box.
  • the outer packaging is tightly packed with polypropylene plastic straps along the well-shaped direction, which requires straightening, firmness, and moderate tightness; for reinforced packaging, a layer of polypropylene plastic woven cloth should be added outside the carton.
  • the above-mentioned multi-curved bulletproof helmet molding method is characterized in that the unit weight of the single-sided phenolic resin glue prepreg described in step 1 is 290 grams per square meter, the thickness is 0.35mm-0.45mm, and the glue-containing The amount is 12%; the unit weight of the double-side impregnated phenolic resin glue prepreg is 420 grams per square meter, the thickness is 0.63mm-0.73mm, and the glue content is 24%.
  • the present invention ensures excellent performance of the finally obtained bulletproof helmet by controlling the weight, thickness and glue content of the single-side impregnated phenolic resin glue prepreg and the double-side impregnated phenolic resin glue prepreg.
  • a kind of multi-curved surface ballistic helmet molding method is characterized in that, the diameter of 1# big face described in step 1 is 520mm, and the length of A tailor is 199mm, and the projection length of B tailor on A tailor is 119mm, and B tailor The vertical distance away from one end of tailor A to tailor A is 40mm, the diameter of 2# small face is 180mm, the diameter of 3# small face is 140mm, and the size of said 4# large face is the same as that of 1# large face.
  • the invention determines the size and shape of the opening by controlling the specific parameters of tailor A and tailor B, thereby ensuring the interface overlap when laying the helmet, ensuring the integrity of the single-layer helmet shell when laying a single surface, and then ensuring the entire helmet shell
  • the interface is the integrity of the interface
  • the above-mentioned method for forming a multi-curved bulletproof helmet is characterized in that the prepreg material impregnated with phenolic resin glue on one side in step 1 is cut according to the inner layer lofting drawing, and the inner layer lofting drawing is dipped in one side with phenolic resin
  • the length ⁇ width of the glue prepreg is 1950mm ⁇ 1400mm, and the 1# large surface is distributed in three rows along the width direction with 3 as a row, and 8 2# small surfaces and 8 3# small surfaces are distributed in the gap;
  • the cutting of the double-sided phenolic resin glue prepreg is carried out according to the outer layer lofting drawing.
  • the length ⁇ width of the double-sided phenolic resin glue prepreg in the outer layer lofting drawing is 1950 mm ⁇ 1400 mm, and the 4# large The faces are distributed in three rows along the width direction in a row of three.
  • the present invention designs 1# large surface, 2# small surface, 3# small The arrangement of the surface and the 4# large surface maximizes the use of raw materials and avoids material waste. CNC cutting machines are used for cutting with high precision, and at the same time, each sheet of the same type is guaranteed to be interchangeable.
  • a kind of multi-curved surface bulletproof helmet forming method is characterized in that, the parameter of preliminary setting described in the step 2: pressure is 0.7MPa, and the temperature of laying helmet mold male mold is 80 °C, and the temperature of female mold is 95 °C, time 5 minutes to 8 minutes.
  • the invention ensures the tight connection between the laid surface layers of each layer by controlling the parameters of preliminary shaping, forms a good structure, and ensures the performance of the bulletproof helmet.
  • the above-mentioned method for forming a multi-curved bulletproof helmet is characterized in that the preheating parameters in step 4 are as follows: the pressure is 140kg/cm 2 -200kg/cm 2 , the temperature of the upper mold of the open mold is 100°C, and the temperature of the lower mold The temperature is 90°C and the time is 5 minutes.
  • the helmet shell is pre-shaped and pre-cured in a mold by controlling the parameters of pre-heating.
  • the above-mentioned method for forming a multi-curved bulletproof helmet is characterized in that the parameters for pre-cooling and shaping described in step 5 are: the pressure is 140kg/cm 2 -200kg/cm 2 , and the time is 5 minutes.
  • the helmet shell is preliminarily pre-shaped in the mold to prevent wrinkles.
  • the above-mentioned multi-curved surface bulletproof helmet molding method is characterized in that the parameters of the closed heating described in step six: the pressure is 160kg/cm 2 ⁇ 180kg/cm 2 , the temperature of the upper mold of the closed mold is 170°C, and the temperature of the lower mold The temperature is 160°C, the time is 20min, and the closed mold is opened for deflation after the closed heating for 1min ⁇ 3min. The number of deflation times is 3 ⁇ 5 times. .
  • the glue on the 1# large surface, 2# small surface, 3# small surface and 4# large surface is completely melted, and completely penetrates into the inside of the fiber, and through several times of deflation, Eliminate air bubbles and avoid air bubbles inside or outside the helmet shell, which will affect the ballistic performance.
  • the above-mentioned multi-curved bulletproof helmet molding method is characterized in that the parameters of the closed cold setting in step 7 are: the pressure is 200kg/cm 2 , and the time is 8min.
  • the present invention completes the final shape of the helmet shell by controlling the parameters of the closed cold setting, and avoids the phenomenon of wrinkles, peeling and foaming of the helmet shell.
  • the above-mentioned multi-curved bulletproof helmet molding method is characterized in that the polyurea described in step eleven is a two-component special polyurea protective material 1401, and the conditions for spraying polyurea are: using a polyurea spraying machine, spraying The temperature is 80°C, the spraying pressure is 1400psi, the number of spraying circles is 5 circles, the number of revolutions is 6r/min, the spraying width is 10mm, and the thickness is 0.5mm-0.8mm.
  • the invention ensures that the paint surface of the helmet body is uniform by controlling the parameters of spraying, and there is no phenomenon such as paint leakage, flow paint pores, etc., and ensures that the thickness of the paint leather is not more than 0.8mm, and the paint surface of the inner surface of the helmet is smooth.
  • the present invention has the following advantages:
  • the present invention prepares 1# large noodles, 2# small noodles, 3# small noodles and 4# large noodles by lofting and cutting, and then carries out laying and a series of pressing and subsequent processing to obtain low-cost, low-weight
  • the high-performance multi-curved bulletproof helmet, the anti-fragment performance and ballistic performance of the prepared bulletproof helmet have high stability and consistency at a random point of the helmet shell, and have excellent safety, meeting the requirements of military-grade bulletproof helmets.
  • the present invention designs openings on the 1# large surface and 4# large surface, and staggers the openings by 45° when laying helmets, so as to satisfy the interface coincidence degree during laying to the greatest extent, and can ensure the laying and forming of a single surface
  • the integrity of the single-layer helmet shell forms a multi-curved helmet shell structure, thereby ensuring the integrity of the interface of the entire helmet shell, that is, the interface.
  • the present invention designs 1# large surface, 2# small surface, 3
  • the arrangement of #small face and 4# large face maximizes the use of raw materials and avoids material waste.
  • CNC cutting machines are used for cutting with high precision.
  • each sheet of the same type is guaranteed to be interchangeable, and each fabric is made
  • the overlapping parts are closely arranged along the perimeter path of the helmet shell to ensure that the overlapping parts in the perimeter direction of the helmet shell are uniform, effective and the relative number of layers is consistent. The stability and consistency of ballistic and fragmentation resistance at a random point on the shell.
  • the basic structure of the bulletproof helmet is formed by the 1# large surface
  • the top of the bulletproof helmet is reinforced by the 3# and 2# small surfaces
  • the bonding of the outermost layer and the inner layer and the outside of the helmet are guaranteed by the 4# large surface Smooth, all surfaces are guaranteed to be concentric when laying, ensuring the strength of all sides of the bulletproof helmet.
  • Fig. 1 is the process flow chart of the present invention to prepare multi-curved bulletproof helmet.
  • Fig. 2 is a schematic structural view of the 1# large noodle of Example 1 of the present invention.
  • Fig. 3 is a schematic structural view of the 2# facet in Example 1 of the present invention.
  • Fig. 4 is a schematic structural view of the 3# facet in Example 1 of the present invention.
  • Fig. 5 is a schematic structural view of the 4# large noodle of Example 1 of the present invention.
  • Fig. 6 is a drawing for setting out the inner layer of Embodiment 1 of the present invention.
  • Fig. 7 is the outer layer lofting drawing of embodiment 1 of the present invention.
  • Fig. 8 is a schematic structural view of the multi-curved bulletproof helmet prepared in Example 1 of the present invention.
  • Fig. 1 is the process flow chart of preparing multi-curved bulletproof helmet of the present invention, as can be seen from Fig. 1, the present invention prepares multicurved surface bulletproof helmet and comprises the following steps: lofting cutting, laying helmet, edge trimming, open mold preheating, open mold Pre-cooling and shaping, heating of the closed mold, cold setting of the closed mold, drilling, internal and external surface treatment, adhesive edge sealing, spraying polyurea, assembling the suspension system and the cap cover to obtain a multi-curved bulletproof helmet.
  • Step 1 Lofting and cutting: cut the single-sided phenolic resin glue prepreg to obtain 1# large surface, 2# small surface and 3# small surface; the 1# large surface, 2# small surface and 3# small surface
  • the surfaces are all circular, and there are four openings evenly distributed on the 1# large surface, and the openings include A tailor and B tailor, and the A tailor is located on two mutually perpendicular diameters of the 1# large surface.
  • the outer side extends toward the center of the circle and the length is less than the radius.
  • the tailor B is located on the counterclockwise side of the tailor A, extends from the outer side of the circle to the tailor A and has a certain angle with the tailor A; the double-sided phenolic resin glue prepreg is cut, Obtain the 4# large surface; the shape and the opening of the 4# large surface are all the same as the 1# large surface; the unit weight of the single-sided phenolic resin glue prepreg is 290 grams per square meter, and the thickness is 0.35mm ⁇ 0.45mm, with a glue content of 12%; the unit weight of the double-sided phenolic resin glue prepreg is 420 grams per square meter, a thickness of 0.63mm ⁇ 0.73mm, and a glue content of 24%; The diameter of the 1# large face is 520mm, the length of tailor A is 199mm, the projection length of tailor B on tailor A is 119mm, the vertical distance from the end of tailor B away from tailor A to tailor A is 40mm, and the diameter of 2# small face is 180mm , the diameter of the small face
  • Step 2 laying the helmet: the 1# large face obtained in step 1, the 2# small face, the 3# small face and the 4# large face are carried out on the helmet laying mold and preliminary finalized to obtain the helmet shell;
  • the process of helmet and preliminary finalization is as follows: every 2 layers of 1# large surface and 1 layer of 3# small surface are laid on the male mold of the helmet mold, and a total of 10 layers of 1# large surface and 5 layers of 3# small surface are laid.
  • the male mold of the helmet mold The female mold of the helmet laying mould, which rises and tightens, is initially shaped; the parameters of the preliminary setting are: the pressure is 0.7MPa, the temperature of the male helmet laying mold is 80°C, the temperature of the female mold is 95°C, and the time is 6min;
  • Step 3 trimming: trimming the helmet shell obtained in step 2 to obtain the cut helmet shell;
  • Step 4 Preheating the open mold: put the cut helmet shell obtained in step 3 into the open mold of the hydraulic press for preheating to obtain a preheated helmet shell; the parameters of the preheating: the pressure is 140kg/cm 2 ⁇ 200kg /cm 2 , the temperature of the upper mold of the open mold is 100°C, the temperature of the lower mold is 90°C, and the time is 5min;
  • Step 5 open the mold for pre-cooling and shaping: put the preheated helmet shell obtained in step 4 into the open mold of the hydraulic press for pre-cooling and shaping to obtain a pre-cooling and shaping helmet shell; the parameters of the pre-cooling and shaping: the pressure is 180kg/cm 2 , time 5min;
  • Step 6 Heating the closed mold: Put the pre-cooled and shaped helmet shell obtained in step 5 into the closed mold of the hydraulic press for closed heating to obtain a closed and heated helmet shell; the parameters of the closed heating: the pressure is 170kg/cm 2 The temperature of the mold is 170°C, the temperature of the lower mold is 160°C, and the time is 20 minutes. After sealing and heating for 2 minutes, open the closed mold for deflation. The number of deflation times is 4 times, and the time for each deflation is 1.5 minutes. Hold the pressure for 8 minutes;
  • Step 7 Cold shaping of the closed mold: put the closed and heated helmet shell obtained in step 6 into the open mold of the hydraulic press for closed cold shaping to obtain a closed cold shaped helmet shell; the parameters of the closed cold shaping: the pressure is 200kg/cm 2 , The time is 8 minutes;
  • Step 8 drilling: drilling the closed cold-shaped helmet shell obtained in step 7 to obtain the drilled helmet shell;
  • Step 9 internal and external surface treatment: cleaning the internal and external surfaces of the drilled helmet shell obtained in step 8 to obtain a clean helmet shell;
  • Adhesive edge sealing strip stick the edge sealing strip on the edge of the clean helmet shell obtained in step 9, and then polish it to obtain the edge sealing helmet shell;
  • Step eleven spray polyurea: spray polyurea on the surface of the edge-banding helmet shell obtained in step ten to obtain a sprayed helmet shell;
  • the polyurea is a two-component special polyurea protective material 1401, and the conditions for spraying polyurea
  • spraying temperature is 80°C
  • spraying pressure is 1400psi
  • spraying circle is 5 circles
  • revolution number is 6r/min
  • spraying width is 10mm
  • thickness is 0.7mm;
  • Step 12 Assembling the suspension system and cap cover: the sprayed helmet shell obtained in step 11 is sequentially installed with a suspension system and a cap cover to obtain a multi-curved bulletproof helmet.
  • Step 13 Packaging: Fasten the emergency release of the bulletproof helmet obtained in step 12, adjust the head circumference adjuster to the maximum, then put the product certificate, product maintenance manual, and desiccant into the helmet together, and use Wrap the copy paper and put it in a polyethylene plastic bag, then seal it, and put it sideways in a stack of 5 into the inner packing box. Put the two inner packing boxes into the outer packing box, put the "packing inspection sheet" in the upper part of the box, and use polypropylene plastic packing tape to fasten the outer packing along the well-shaped direction, requiring straightening, firmness, and moderate tightness; reinforcement The packaging should add a layer of polypropylene plastic woven cloth outside the carton.
  • the bulletproof helmet prepared in this example meets the requirements for military safety bulletproof helmets in GJB5115A-2012 "Safety Technical Performance Requirements for Military Bulletproof Helmets”.
  • the ballistic helmet prepared in this embodiment is shot at a distance of 5 meters from the top of the helmet, the front side of the helmet, the left side of the helmet, the right side of the helmet and the rear side of the helmet, and the bullets do not pass through.
  • the bulletproof helmet it can also be seen from the height of the bullet marks that the depression caused by the bullet to the bulletproof helmet is very small, indicating that the bulletproof helmet prepared in this embodiment has excellent safety.
  • Fig. 2 is the structural representation of the 1# big face 1 that present embodiment prepares, as can be seen from Fig. 2, the diameter of 1# big face 1 is 520mm, and the length of A tailor 5 is 199mm, and B tailor 6 is in A tailor 5 The projected length above is 119mm, and the vertical distance from the end of Tailor B 6 away from Tailor A 5 to Tailor A 5 is 40mm.
  • Fig. 3 is a schematic structural view of the 2# facet 2 prepared in this embodiment, as can be seen from Fig. 3, the diameter of the 2# facet 2 is 180 mm.
  • Fig. 4 is a schematic structural view of the 3# facet 3 prepared in this embodiment. It can be seen from Fig. 4 that the diameter of the 3# facet 3 is 140 mm.
  • Fig. 5 is a schematic structural view of the 4# large noodle 4 prepared in this embodiment. As can be seen from Fig. 5, the size openings of the 4# large noodle 4 and the 1# large noodle 1 are exactly the same.
  • Fig. 6 is the inner layer lofting drawing of the present embodiment, as can be seen from Fig. 6, the length * width of the single-sided phenolic resin glue prepreg 7 is 1950mm * 1400mm, and the 1# large surface 1 is 3 One row is arranged in three rows in a staggered manner along the width direction, and eight 2# facets 2 and eight 3# facets 3 are distributed in the gaps.
  • Figure 7 is the outer layer lofting drawing of this embodiment, as can be seen from Figure 7, the length ⁇ width of the double-sided phenolic resin glue prepreg 8 is 1950mm ⁇ 1400mm, and the 4# large surface 4 is a row of 3 Three rows are staggered along the width direction.
  • Fig. 8 is a schematic structural view of the multi-curved bulletproof helmet prepared in this embodiment. It can be seen from Fig. 8 that the multi-curved bulletproof helmet prepared in this embodiment is in the shape of multi-curved surfaces to effectively cover the head.
  • Step 1 Lofting and cutting: cut the single-sided phenolic resin glue prepreg to obtain 1# large surface, 2# small surface and 3# small surface; the 1# large surface, 2# small surface and 3# small surface
  • the surfaces are all circular, and there are four openings evenly distributed on the 1# large surface, and the openings include A tailor and B tailor, and the A tailor is located on two mutually perpendicular diameters of the 1# large surface.
  • the outer side extends toward the center of the circle and the length is less than the radius.
  • the tailor B is located on the counterclockwise side of the tailor A, extends from the outer side of the circle to the tailor A and has a certain angle with the tailor A; the double-sided phenolic resin glue prepreg is cut, Obtain the 4# large surface; the shape and the opening of the 4# large surface are all the same as the 1# large surface; the unit weight of the single-sided phenolic resin glue prepreg is 290 grams per square meter, and the thickness is 0.35mm ⁇ 0.45mm, with a glue content of 12%; the unit weight of the double-sided phenolic resin glue prepreg is 420 grams per square meter, a thickness of 0.63mm ⁇ 0.73mm, and a glue content of 24%; The diameter of the 1# large face is 520mm, the length of tailor A is 199mm, the projection length of tailor B on tailor A is 119mm, the vertical distance from the end of tailor B away from tailor A to tailor A is 40mm, and the diameter of 2# small face is 180mm , the diameter of the small face
  • Step 2 laying the helmet: the 1# large face obtained in step 1, the 2# small face, the 3# small face and the 4# large face are carried out on the helmet laying mold and preliminary finalized to obtain the helmet shell;
  • the process of helmet and preliminary finalization is as follows: every 2 layers of 1# large surface and 1 layer of 3# small surface are laid on the male mold of the helmet mold, and a total of 10 layers of 1# large surface and 5 layers of 3# small surface are laid.
  • the male mold of the helmet mold The female mold of the helmet laying mould, which rises and tightens, is initially shaped; the parameters of the preliminary setting are: the pressure is 0.7MPa, the temperature of the male helmet laying mold is 80°C, the temperature of the female mold is 95°C, and the time is 5min;
  • Step 3 trimming: trimming the helmet shell obtained in step 2 to obtain the cut helmet shell;
  • Step 4 Open mold preheating: Put the cut helmet shell obtained in step 3 into the open mold of the hydraulic press for preheating to obtain a preheated helmet shell; the parameters of the preheating: the pressure is 200kg/cm 2 , open The temperature of the upper mold of the mold is 100°C, the temperature of the lower mold is 90°C, and the time is 5 minutes;
  • Step 5 open the mold for pre-cooling and shaping: put the preheated helmet shell obtained in step 4 into the open mold of the hydraulic press for pre-cooling and shaping to obtain a pre-cooling and shaping helmet shell; the parameters of the pre-cooling and shaping: the pressure is 140kg/cm 2 , time 5min;
  • Step 6 Heating the closed mold: Put the pre-cooled and shaped helmet shell obtained in step 5 into the closed mold of the hydraulic press for closed heating to obtain a closed and heated helmet shell; the parameters of the closed heating: the pressure is 180kg/cm 2 The temperature of the mold is 170°C, the temperature of the lower mold is 160°C, and the time is 20 minutes. After sealing and heating for 1 minute, open the closed mold to deflate. The number of deflation is 5 times, and the time of each deflation is 1 minute. Press for 10 minutes;
  • Step 7 Cold shaping of the closed mold: put the closed and heated helmet shell obtained in step 6 into the open mold of the hydraulic press for closed cold shaping to obtain a closed cold shaped helmet shell; the parameters of the closed cold shaping: the pressure is 200kg/cm 2 , The time is 8 minutes;
  • Step 8 drilling: drilling the closed cold-shaped helmet shell obtained in step 7 to obtain the drilled helmet shell;
  • Step 9 internal and external surface treatment: cleaning the internal and external surfaces of the drilled helmet shell obtained in step 8 to obtain a clean helmet shell;
  • Adhesive edge sealing strip stick the edge sealing strip on the edge of the clean helmet shell obtained in step 9, and then polish it to obtain the edge sealing helmet shell;
  • Step eleven spray polyurea: spray polyurea on the surface of the edge-banding helmet shell obtained in step ten to obtain a sprayed helmet shell;
  • the polyurea is a two-component special polyurea protective material 1401, and the conditions for spraying polyurea
  • spraying temperature is 80°C
  • spraying pressure is 1400psi
  • spraying circle is 5 circles
  • revolution is 6r/min
  • spraying width is 10mm
  • thickness is 0.8mm;
  • Step 12 Assembling the suspension system and cap cover: the sprayed helmet shell obtained in step 11 is sequentially installed with a suspension system and a cap cover to obtain a multi-curved bulletproof helmet.
  • Step 13 Packaging: Fasten the emergency release of the bulletproof helmet obtained in step 12, adjust the head circumference adjuster to the maximum, then put the product certificate, product maintenance manual, and desiccant into the helmet together, and use Wrap the copy paper and put it in a polyethylene plastic bag, then seal it, and put it sideways in a stack of 5 into the inner packing box. Put the two inner packing boxes into the outer packing box, put the "packing inspection sheet" in the upper part of the box, and use polypropylene plastic packing tape to fasten the outer packing along the well-shaped direction, requiring straightening, firmness, and moderate tightness; reinforcement The packaging should add a layer of polypropylene plastic woven cloth outside the carton.
  • the bulletproof helmet prepared in this example meets the requirements for military safety bulletproof helmets in GJB5115A-2012 "Safety Technical Performance Requirements for Military Bulletproof Helmets”.
  • Step 1 Lofting and cutting: cut the single-sided phenolic resin glue prepreg to obtain 1# large surface, 2# small surface and 3# small surface; the 1# large surface, 2# small surface and 3# small surface
  • the surfaces are all circular, and four openings are evenly distributed on the 1# large surface, and the openings all include A tailor and B tailor, and the A tailor is located on two mutually perpendicular diameters of the 1# large surface.
  • the outer side extends toward the center of the circle and the length is less than the radius.
  • the tailor B is located on the counterclockwise side of the tailor A, extends from the outer side of the circle to the tailor A and has a certain angle with the tailor A; the double-sided phenolic resin glue prepreg is cut, Obtain the 4# large surface; the shape and the opening of the 4# large surface are all the same as the 1# large surface; the unit weight of the single-sided phenolic resin glue prepreg is 290 grams per square meter, and the thickness is 0.35mm ⁇ 0.45mm, with a glue content of 12%; the unit weight of the double-sided phenolic resin glue prepreg is 420 grams per square meter, a thickness of 0.63mm ⁇ 0.73mm, and a glue content of 24%; The diameter of the 1# large face is 520mm, the length of tailor A is 199mm, the projection length of tailor B on tailor A is 119mm, the vertical distance from the end of tailor B away from tailor A to tailor A is 40mm, and the diameter of 2# small face is 180mm , the diameter of the small face
  • Step 2 laying the helmet: the 1# large face obtained in step 1, the 2# small face, the 3# small face and the 4# large face are carried out on the helmet laying mold and preliminary finalized to obtain the helmet shell;
  • the process of helmet and preliminary finalization is as follows: every 2 layers of 1# large surface and 1 layer of 3# small surface are laid on the male mold of the helmet mold, and a total of 10 layers of 1# large surface and 5 layers of 3# small surface are laid.
  • the male mold of the helmet mold rise up and tighten the female mold of the helmet laying mold for preliminary shaping; the parameters of the preliminary shaping: the pressure is 0.7MPa, the temperature of the male helmet laying mold is 80°C, the temperature of the female mold is 95°C, and the time is 8min;
  • Step 3 trimming: trimming the helmet shell obtained in step 2 to obtain the cut helmet shell;
  • Step 4 Preheating of the open mold: Put the cut helmet shell obtained in step 3 into the open mold of the hydraulic press for preheating to obtain a preheated helmet shell; the parameters of the preheating: the pressure is 140kg/cm 2 , open The temperature of the upper mold of the mold is 100°C, the temperature of the lower mold is 90°C, and the time is 5 minutes;
  • Step 5 open the mold for pre-cooling and shaping: put the preheated helmet shell obtained in step 4 into the open mold of the hydraulic press for pre-cooling and shaping, and obtain the pre-cooling and shaping helmet shell; the parameters of the pre-cooling and shaping: the pressure is 200kg/cm 2 , time 5min;
  • Step 6 Heating the closed mold: put the pre-cooled and shaped helmet shell obtained in step 5 into the closed mold of the hydraulic press for closed heating to obtain a closed and heated helmet shell; the parameters of the closed heating: the pressure is 160kg/cm 2 The temperature of the mold is 170°C, the temperature of the lower mold is 160°C, and the time is 20 minutes. After 3 minutes of closed heating, the closed mold is opened to deflate. The number of deflation is 3 times, and the time of each deflation is 2 minutes. Press for 5 minutes;
  • Step 7 Cold shaping of the closed mold: put the closed and heated helmet shell obtained in step 6 into the open mold of the hydraulic press for closed cold shaping to obtain a closed cold shaped helmet shell; the parameters of the closed cold shaping: the pressure is 200kg/cm 2 , The time is 8 minutes;
  • Step 8 drilling: drilling the closed cold-shaped helmet shell obtained in step 7 to obtain the drilled helmet shell;
  • Step 9 internal and external surface treatment: cleaning the internal and external surfaces of the drilled helmet shell obtained in step 8 to obtain a clean helmet shell;
  • Adhesive edge sealing strip stick the edge sealing strip on the edge of the clean helmet shell obtained in step 9, and then polish it to obtain the edge sealing helmet shell;
  • Step eleven spray polyurea: spray polyurea on the surface of the edge-banding helmet shell obtained in step ten to obtain a sprayed helmet shell;
  • the polyurea is a two-component special polyurea protective material 1401, and the conditions for spraying polyurea
  • spraying temperature is 80°C
  • spraying pressure is 1400psi
  • spraying circle is 5 circles
  • revolution number is 6r/min
  • spraying width is 10mm
  • thickness is 0.5mm;
  • Step 12 assembling the suspension system and the cap cover: the sprayed helmet shell obtained in the step eleven is installed with the suspension system and the cap cover successively to obtain a multi-curved bulletproof helmet.
  • Step 13 Packaging: Fasten the emergency release of the bulletproof helmet obtained in step 12, adjust the head circumference adjuster to the maximum, then put the product certificate, product maintenance manual, and desiccant into the helmet together, and use Wrap the copy paper and put it in a polyethylene plastic bag, then seal it, and put it sideways in a stack of 5 into the inner packing box. Put the two inner packing boxes into the outer packing box, put the "packing inspection sheet" in the upper part of the box, and use polypropylene plastic packing tape to fasten the outer packing along the well-shaped direction, requiring straightening, firmness, and moderate tightness; reinforcement The packaging should add a layer of polypropylene plastic woven cloth outside the carton.
  • the bulletproof helmet prepared in this example meets the requirements for military safety bulletproof helmets in GJB5115A-2012 "Safety Technical Performance Requirements for Military Bulletproof Helmets”.

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Abstract

一种多曲面防弹头盔成型方法，包括以下步骤：步骤一、放样切割；步骤二、铺盔；步骤三、切边；步骤四、开放模具预加热；步骤五、开放模具预冷定型；步骤六、封闭模具加热；步骤七、封闭模具冷定型；步骤八、打孔；步骤九、内外表面处理；步骤十、黏封边胶条；步骤十一、喷涂聚脲；步骤十二、装配悬挂系统和帽套，得到多曲面防弹头盔。该方法通过放样切割制备1#大面(1)、2#小面(2)、3#小面(3)和4#大面(4)，然后将其进行铺盔和一系列的压制和后续处理，得到了低成本、低重量的高性能多曲面防弹头盔，制备的防弹头盔的防破片性能和防弹性能在盔壳某个随机点的稳定性和一致性高，具有极佳的安全性，达到军用级防弹头盔的要求。

Description

一种多曲面防弹头盔成型方法 技术领域
本发明属于防弹防护设备材料技术领域，具体涉及一种多曲面防弹头盔成型方法。
背景技术
国内外有关生产15武警通用头盔比较多，防弹头盔是一种能吸收和消散弹头的能量、阻止穿透、减轻钝伤并有效保护头部的装备，广泛应用于警察武警等高危险行业人员的特殊的保护上。
军用头盔一般主要由盔壳、衬里和悬挂组件三部分构成。壳体由强度高、韧性好的材料制成，它通过材料变形来吸收和减缓子弹和弹片等的冲击力，防止壳体碎片伤及头部；衬里起到透气、吸汗、保暖和减震等作用；悬挂组件将壳体与衬里分隔开，可调节和适应不同头形的士兵。随着科技的发展，头盔壳体所用材质有特种钢、玻璃钢、陶瓷、增强塑料、酚醛树脂纤维、尼龙纤维、复合纤维等，其性能越来越好，防护能力也越来越强。
中国古代，头盔称为胄、首铠、兜鍪等，用藤、皮革或铜铁等制作。19世纪末，许多国家的军队仍在使用铁盔。第一次世界大战中，为防高爆榴弹弹片和枪弹的杀伤，头盔改用钢材制作，称为钢盔。第二次世界大战及其后几次局部战争，仍继续使用钢盔，并在用料和造型上有所改进。20世纪80年代后，美、英、西班牙和以色列等国家的军队，已开始装备无钢头盔。这种头盔用凯夫拉(Kevlar)等高强度合成纤维压制而成，重量比钢盔轻，防护性能好。有的国家已研制成兼备攻防两种功能的头盔枪，既可防护，又可以发射无壳子弹。中国人民解放军在20世纪50年代研制了具有减震和通信功能的坦克工作帽。到90年代末研制装备了多功能的 装甲兵头盔和防弹能力较强的步兵头盔。21世纪初研制了具有防杀伤功能的非金属伞兵头盔。除具备与步兵头盔相同的防弹性能外，悬挂系统通常采用缓冲衬垫以获得良好的减震缓冲性能，避免伞兵头部或颈部在着陆时受伤。
我军于1994年研制成功了QGF02型凯夫拉纤维增强复合的新型非金属防弹头盔。该盔的V50值优于美军装备的PASGT头盔，抗弹能力比GK80钢盔提高了38.4％；有效防护面积达1266平方厘米，比GK80钢盔提高16％，与美军PASGT头盔基本相当。
现有防弹头盔按照原材料分类，轻质复合盔分为芳纶复合盔和PE复合盔两大类。相比之下，PE复合盔虽然价格便宜，但其盔壳厚度高，动态凹陷大、耐高温性能差，主要适用于中、低端客户；芳纶复合头盔具有盔壳厚度低、动态凹陷小、耐高温性能优、刚性较优等优点，但是价格偏高，适用于中、高端客户。
芳纶头盔主要由多层芳纶机织布片料层层堆叠，经高温、高压复合压制成型。在规定军用头盔质量限制的条件下，影响芳纶头盔的防弹性能和防破片性能的主要因素主要有：芳纶纤维的种类、芳纶机织布的织法工艺、芳纶机织布浸胶工艺及后期芳纶片料的裁剪工艺、压制温度、压制压力、保压时间等。其中，芳纶头盔中芳纶片料的堆叠结构与成品盔壳的防弹性能和防破片性能息息相关，盔壳中芳纶片料的堆叠均匀性和层数，决定了盔壳上某个随机点的相对层数，其直接决定了防弹头盔的防弹性能和防破片性能。
现目前的芳纶头盔盔壳制作工艺中，存在芳纶片料搭接不均匀，盔壳上某些位置出现褶皱，使盔壳某个随机点的相对芳纶层数不一致，导致防弹性能和防破片性能不稳定，随机性较强。
发明内容
本发明所要解决的技术问题在于针对上述现有技术的不足，提供一种多曲面防弹头盔成型方法。该成型方法通过放样切割制备1#大面、2#小面、3#小面和4#大面，然后将其进行铺盔和一系列的压制和后续处理，得到了低成本、低重量的高性能多曲面防弹头盔，制备的防弹头盔的防破片性能和防弹性能在盔壳某个随机点的稳定性和一致性高，具有极佳的安全性，达到军用级防弹头盔的要求。
为解决上述技术问题，本发明采用的技术方案是：一种多曲面防弹头盔成型方法，其特征在于，该方法包括以下步骤：
步骤一、放样切割：将单面浸酚醛树脂胶预浸料进行裁剪，得到1#大面，2#小面和3#小面；所述1#大面，2#小面和3#小面均为圆形，所述1#大面上均匀分布有四个开口，所述开口均包括A裁缝和B裁缝，所述A裁缝位于1#大面两条互相垂直的直径上，从圆外侧向圆心延伸且长度小于半径，所述B裁缝位于A裁缝的逆时针侧，从圆外侧向A裁缝延伸且与A裁缝具有一定夹角；将双面浸酚醛树脂胶预浸料进行裁剪，得到4#大面；所述4#大面的形状与开口均与1#大面相同；
步骤二、铺盔：将步骤一中得到的1#大面，2#小面，3#小面和4#大面在铺盔模具上进行铺盔和初步定型，得到盔壳；所述铺盔和初步定型的过程为：在铺盔模具的阳模上每铺2层1#大面，铺1层3#小面，共铺1#大面10层和3#小面5层，然后继续铺2层1#大面，铺1层2#小面，最后铺1层1#大面，直至总计19层，再在最外层铺放1层4#大面，其中相邻的1#大面之间的开口错开45°，且1#大面，2#小面，3#小面和4#大面同心铺放，在每层铺放后，均使铺盔模具的阳模上升顶紧铺盔模具的阴模进行初步定型；
步骤三、切边：将步骤二中得到的盔壳进行切边，得到切割后的盔壳；
步骤四、开放模具预加热：将步骤三中得到的切割后的盔壳放入液压机开放模具中进行预加热，得到预加热盔壳；
步骤五、开放模具预冷定型：将步骤四中得到的预加热盔壳放入液压机开放模具中进行预冷定型，得到预冷定型盔壳；
步骤六、封闭模具加热：将步骤五中得到的预冷定型盔壳放入液压机封闭模具进行封闭加热，得到封闭加热盔壳；
步骤七、封闭模具冷定型：将步骤六中得到的封闭加热盔壳放入液压机开放模具进行封闭冷定型，得到封闭冷定型盔壳；
步骤八、打孔：将步骤七中得到的封闭冷定型盔壳进行钻孔，得到钻孔盔壳；
步骤九、内外表面处理：将步骤八中得到的钻孔盔壳的内外表面进行清洁，得到清洁盔壳；
步骤十、黏封边胶条：将步骤九中得到的清洁盔壳的边沿黏封边胶条，然后进行打磨，得到封边盔壳；
步骤十一、喷涂聚脲：将步骤十中得到的封边盔壳表面喷涂聚脲，得到喷涂盔壳；
步骤十二、装配悬挂系统和帽套：将步骤十一中得到的喷涂盔壳安装悬挂系统和帽套，得到多曲面防弹头盔。
本发明放样切割时通过采用单面浸酚醛树脂胶预浸料进行裁剪，得到1#大面，2#小面和3#小面，采用单面浸酚醛树脂胶预浸料控制单片重量和含胶量，在加热状态下，胶融化并固化，粘接相邻的两层预浸料，通过双面浸酚醛树脂胶预浸料进行裁剪，得到4#大面，采用双面浸酚醛树脂胶预浸料，保证最外层与内层的粘接和头盔外面光滑，通过在1#大面和4#大面上设置开口，能最大程度满足铺放时的界面重合度，可以保证单个面铺放成型时，单层盔壳的完整性，形成多曲面的盔壳结构，进而保证整个盔壳的界面即接面的完整性；放样切割中铺布时布边应以一侧为齐，裁剪顺序应以先裁小片为准，剪裁时应严格按线裁剪，防止走刀、出现割线不齐整现象，将剪裁完后的各片按技术要求进行层数标记组合；
本发明单面浸酚醛树脂胶预浸料为使用箭杆织布机采用对位芳纶长丝840D，级别为629T为原料织造出来的平纹布，幅宽为1400mm，卷长为100m，该平纹布的经向密度为146～150根/10cm，纬向密度为146～150根/10cm，经向断裂强力不小于12000N/50mm，纬向断裂强力不小于12000N/50mm，经向断裂伸长率不大于4％，纬向断裂伸长率不大于4％，经向断裂强力变异系数不大于7，纬向断裂强力变异系数不大于7；双面浸酚醛树脂胶预浸料为使用箭杆织布机采用对位芳纶长丝1500D，级别为629T为原料织造出来的平纹布，幅宽为1400mm，卷长为100m，该平纹布的经向密度为120～124根/10cm，纬向密度为120～124根/10cm，经向断裂强力不小于14500N/50mm，纬向断裂强力不小于15000N/50mm，经向断裂伸长率不大于8.5％，纬向断裂伸长率不大于8.5％，经向断裂强力变异系数不大于7，纬向断裂强力变异系数不大于7，该平纹布织物表面平整光洁，无明显起毛，经纱纬纱排列整齐均匀，无缺纱，无油污及明显杂物织入，布边完整；
本发明铺盔时通过1#大面构成防弹头盔的基本架构，通过3#、2#小面加固防弹头盔顶部，通过4#大面保证最外层与内层的粘接和头盔外面光滑，铺放时所有面都保证同心，保证了防弹头盔各面的强度，并且铺盔时每层在搭接时应按顺序进行，搭接抻拉适度，前后左右定位准确，铺好的盔体各层搭接紧密，牢固不松散，铺盔完成后取盔时要用工具小心从下向上开启，不可用手直接从里向外扣取，以免导致盔口过大无法预压，每层每片搭接时按层次顺序进行，不准颠倒，每层之间的开口应是后一片的起始与前一片开口之间的旋转角度为45°错开，防止贯穿缝的产生，后一片的起始要与前一片的结尾对接好，各层粘合牢固、圆顺、不得有褶皱、松散脱层现象，糊好的盔体要轻拿轻放，遮盖避光、避湿保存，防止盔体散落，防止水及灰尘落入；以45°错开的方式进行铺盔，不同形状的预浸料片材结构在铺盔的时候旋转角度不同；然后，再将研宄发现，根据应力波传播机理，应力波 在弯度小的纤维中传播相对于弯度大的快，应力波传递越快，单位时间内传递能量越多，吸能效果越好，因此0°/45°的方式的片材铺盔结构防弹性能较好，并且可以保证复合结构的纤维正交结构，在铺盔复合过程中的纤维彼此平行、伸直排列；这样的排列方式保证了织物结构中纤维屈曲和相互交织的握持效应，此种结构实现了双向预浸料织物结构更有利于弹击时产生的冲击波沿纤维的轴向传播，因而可以增加有效承载纤维的根数，从而更有利于冲击波扩散速度，提升防弹头盔的防弹性能；
本发明通过切边，将预压后的产品用带锯裁剪机按线裁去多余的部分，将铺好后的盔壳用直刀电剪刀沿边线切割飞边，切割整齐，无毛边，切边顺直，边缘无偏歪、缺口、虚边及缺层少肉现象，切边前的盔壳的重量为1.3kg～1.4kg，切边后的盔壳的重量为1.0kg～1.1kg；
本发明通过开放模具预加热，使盔壳在模具中预定型，预固化，通过开放模具预冷定型，使盔壳在模具中进行初步预定型，防止出现褶皱，通过封闭模具加热，使1#大面，2#小面，3#小面和4#大面上的胶完全融化，并完全渗透到纤维的内部，并通过几次放气，排除气泡，避免气泡在盔壳内部或者外部，影响防弹性能，通过封闭模具冷定型，完成最终的盔壳定型，通过定型方式，保证了得到的防弹头盔，外观左右对称，盔体饱满，避免了盔壳出现褶皱、脱皮、起泡的现象；
本发明通过用手电钻按技术钻孔，将打孔工装模具套在盔体外侧，在盔体下部用手电钻开4个直径为5.5mm的通孔，用于安装悬挂系统，通孔一般为4个，左右两侧各二个毛刺切割干净，左右孔对称；
本发明通过用酒精棉纱清除盔壳表面的细小杂物，以及其他污染物，对盔壳的内外表面进行清洁，确保盔壳内外表面无油、水、硅油及其他漆雾等附着，做到表面光洁，以免影响后面喷漆效果，并用高压风枪把盔壳内外表面的附着污物吹干净；
本发明通过在盔壳边缘双面涂101胶，涂胶均匀，然后粘接氯丁橡胶 胶条，密封胶条粘在盔壳边缘，遮盖盔壳边缘毛刺，避免使人被边缘毛刺伤害，氯丁橡胶胶条光滑，直线与弧线过渡自然流畅，胶条两端在盔壳边缘重合10mm，之后用砂纸对黏结胶条的盔口处及胶条进行打磨处理，表面无划伤，溢料、飞边修饰干净，打磨后用高压风枪把盔壳内外表面的附着污物吹干净，粘接后粘合无开裂、虚粘、褶皱、偏歪、虚边及凸凹不平现象，胶条与盔壳粘接牢固，直弧过渡自然、宽窄一致；
本发明通过采用4件M5内六角螺钉将悬挂系统安装在盔壳内，悬挂系统前后位置与盔壳一致并拧紧螺母，然后将帽套装在盔壳表面，帽套在盔壳表面平整光滑，无褶皱，得到多曲面防弹头盔，得到的防弹头盔进行检验合格后进行包装。
本发明制备的防弹头盔满足GJB5115A-2012《军用防弹头盔安全技术性能要求》中的要求，本发明合格的防弹头盔进行包装的步骤是先把头盔的紧急脱扣扣合，头围调整器调至最大，然后把产品合格证、产品使用维护说明书、干燥剂一起放入头盔内，用拷贝纸包好装入聚乙烯塑料袋内，然后封口，按5顶一摞侧向放入内包装箱中。把两件内包装箱放入外包装箱中，在箱内上部放入“包装检验单”。外包装采用聚丙烯塑料打包带沿井字形方向扎紧，要求打正、牢固、松紧适度；加固包装应在纸箱外增包聚丙烯塑料编制布一层。
上述的一种多曲面防弹头盔成型方法，其特征在于，步骤一中所述单面浸酚醛树脂胶预浸料的单位克重为290克/平方米，厚度为0.35mm～0.45mm，含胶量为12％；所述双面浸酚醛树脂胶预浸料的单位克重为420克/平方米，厚度为0.63mm～0.73mm，含胶量为24％。本发明通过控制单面浸酚醛树脂胶预浸料和双面浸酚醛树脂胶预浸料的克重、厚度和含胶量，保证了最终得到的防弹头盔性能优异。
上述的一种多曲面防弹头盔成型方法，其特征在于，步骤一中所述1#大面的直径为520mm，A裁缝的长度为199mm，B裁缝在A裁缝上的投 影长度为119mm，B裁缝远离A裁缝一端到A裁缝的垂直距离为40mm，2#小面直径为180mm，3#小面直径为140mm，所述4#大面的尺寸与1#大面相同。本发明通过控制A裁缝和B裁缝具体参数，确定开口的尺寸与形状，保证了铺盔时的界面重合度，保证单个面铺放成型时，单层盔壳的完整性，进而保证整个盔壳的界面即接面的完整性；
上述的一种多曲面防弹头盔成型方法，其特征在于，步骤一中所述单面浸酚醛树脂胶预浸料进行裁剪根据内层放样图纸进行，所述内层放样图纸中单面浸酚醛树脂胶预浸料的长×宽为1950mm×1400mm，所述1#大面以3个为一排沿宽度方向交错分布三排，间隙处分布8个2#小面和8个3#小面；所述双面浸酚醛树脂胶预浸料进行裁剪根据外层放样图纸进行，所述外层放样图纸中双面浸酚醛树脂胶预浸料的长×宽为1950mm×1400mm，所述4#大面以3个为一排沿宽度方向交错分布三排。本发明通过设计内层放样图纸和外层放样图纸中单面浸酚醛树脂胶预浸料、双面浸酚醛树脂胶预浸料的尺寸，设计1#大面、2#小面、3#小面和4#大面的排布，最大限度的利用原材料，避免了材料浪费，采用数控裁剪机进行裁剪，精度高，同时保证了每个同型片材具备互换性。
上述的一种多曲面防弹头盔成型方法，其特征在于，步骤二中所述初步定型的参数：压力为0.7MPa，铺盔模具阳模的温度为80℃，阴模的温度为95℃，时间为5min～8min。本发明通过控制初步定型的参数，保证了每一层铺放的面层之间紧密连接，形成良好的结构，保证了防弹头盔的性能。
上述的一种多曲面防弹头盔成型方法，其特征在于，步骤四中所述预加热的参数：压力为140kg/cm 2～200kg/cm 2，开放模具上模的温度为100℃，下模的温度为90℃，时间为5min。本发明通过控制预加热的参数使盔壳在模具中预定型，预固化。
上述的一种多曲面防弹头盔成型方法，其特征在于，步骤五中所述预 冷定型的参数：压力为140kg/cm 2～200kg/cm 2，时间5min。本发明通过控制预冷定型的参数，使盔壳在模具中进行初步预定型，防止出现褶皱。
上述的一种多曲面防弹头盔成型方法，其特征在于，步骤六中所述封闭加热的参数：压力为160kg/cm 2～180kg/cm 2，封闭模具上模的温度为170℃，下模的温度为160℃，时间为20min，其中封闭加热1min～3min后打开封闭模具进行放气，放气的次数为3～5次，每次的放气时间为1min～2min，继续保压5min～10min。本发明通过控制封闭加热的参数，使1#大面，2#小面，3#小面和4#大面上的胶完全融化，并完全渗透到纤维的内部，并通过几次放气，排除气泡，避免气泡在盔壳内部或者外部，影响防弹性能。
上述的一种多曲面防弹头盔成型方法，其特征在于，步骤七中所述封闭冷定型的参数：压力为200kg/cm 2，时间为8min。本发明通过控制封闭冷定型的参数，完成最终的盔壳定型，避免了盔壳出现褶皱、脱皮、起泡的现象。
上述的一种多曲面防弹头盔成型方法，其特征在于，步骤十一中所述聚脲为双组分特种聚脲防护材料1401，所述喷涂聚脲的条件为：采用聚脲喷涂机，喷涂温度为80℃，喷涂压力为1400psi，喷涂圈数5圈，转数6r/min，喷涂宽度为10mm，厚度为0.5mm～0.8mm。本发明通过控制喷涂的参数保证盔体漆面均匀，没有漏漆流漆气孔等现象，保证了漆皮厚度不超过0.8mm，盔体内表面漆面要平整光滑。
本发明与现有技术相比具有以下优点：
1、本发明通过放样切割制备1#大面、2#小面、3#小面和4#大面，然后将其进行铺盔和一系列的压制和后续处理，得到了低成本、低重量的高性能多曲面防弹头盔，制备的防弹头盔的防破片性能和防弹性能在盔壳某个随机点的稳定性和一致性高，具有极佳的安全性，达到军用级防弹头盔的要求。
2、本发明通过在1#大面和4#大面设计开口，并在铺盔时采用开口错开45°进行铺放，最大程度满足铺放时的界面重合度，可以保证单个面铺放成型时，单层盔壳的完整性，形成多曲面的盔壳结构，进而保证整个盔壳的界面即接面的完整性。
3、本发明通过设计内层放样图纸和外层放样图纸中单面浸酚醛树脂胶预浸料、双面浸酚醛树脂胶预浸料的尺寸，设计1#大面、2#小面、3#小面和4#大面的排布，最大限度的利用原材料，避免了材料浪费，采用数控裁剪机进行裁剪，精度高，同时保证了每个同型片材具备互换性，并且使各面料搭接部分沿着盔壳周长路径方向相互紧密的排列布置，保证在盔壳周长方向各搭接部分均匀、有效及相对层数一致，同时，盔壳表面无褶皱，保证防弹头盔的防弹性能和防破片性能在盔壳某个随机点的稳定性和一致性。
4、本发明铺盔时通过1#大面构成防弹头盔的基本架构，通过3#、2#小面加固防弹头盔顶部，通过4#大面保证最外层与内层的粘接和头盔外面光滑，铺放时所有面都保证同心，保证了防弹头盔各面的强度。
下面通过附图和实施例对本发明的技术方案作进一步的详细描述。
附图说明
图1是本发明制备多曲面防弹头盔的工艺流程图。
图2是本发明实施例1的1#大面的结构示意图。
图3是本发明实施例1的2#小面的结构示意图。
图4是本发明实施例1的3#小面的结构示意图。
图5是本发明实施例1的4#大面的结构示意图。
图6是本发明实施例1的内层放样图纸。
图7是本发明实施例1的外层放样图纸。
图8是本发明实施例1制备的多曲面防弹头盔的结构示意图。
附图标记说明：
1-1#大面；            2-2#小面；            3-3#小面；
4-4#大面；            5-A裁缝；            6-B裁缝；
7-单面浸酚醛树脂胶预浸料；       8-双面浸酚醛树脂胶预浸料。
具体实施方式
图1是本发明制备多曲面防弹头盔的工艺流程图，从图1中可以看出，本发明制备多曲面防弹头盔包括以下步骤：放样切割、铺盔、切边、开放模具预加热、开放模具预冷定型、封闭模具加热、封闭模具冷定型、打孔、内外表面处理、黏封边胶条、喷涂聚脲、装配悬挂系统和帽套，得到多曲面防弹头盔。
实施例1
本实施例包括以下步骤：
步骤一、放样切割：将单面浸酚醛树脂胶预浸料进行裁剪，得到1#大面，2#小面和3#小面；所述1#大面，2#小面和3#小面均为圆形，所述1#大面上均匀分布有四个开口，所述开口均包括A裁缝和B裁缝，所述A裁缝位于1#大面两条互相垂直的直径上，从圆外侧向圆心延伸且长度小于半径，所述B裁缝位于A裁缝的逆时针侧，从圆外侧向A裁缝延伸且与A裁缝具有一定夹角；将双面浸酚醛树脂胶预浸料进行裁剪，得到4#大面；所述4#大面的形状与开口均与1#大面相同；所述单面浸酚醛树脂胶预浸料的单位克重为290克/平方米，厚度为0.35mm～0.45mm，含胶量为12％；所述双面浸酚醛树脂胶预浸料的单位克重为420克/平方米，厚度为0.63mm～0.73mm，含胶量为24％；所述1#大面的直径为520mm，A裁缝的长度为199mm，B裁缝在A裁缝上的投影长度为119mm，B裁缝远离A裁缝一端到A裁缝的垂直距离为40mm，2#小面直径为180mm，3#小面直径为140mm，所述4#大面的尺寸与1#大面相同；所述单面浸酚醛树脂 胶预浸料进行裁剪根据内层放样图纸进行，所述内层放样图纸中单面浸酚醛树脂胶预浸料的长×宽为1950mm×1400mm，所述1#大面以3个为一排沿宽度方向交错分布三排，间隙处分布8个2#小面和8个3#小面；所述双面浸酚醛树脂胶预浸料进行裁剪根据外层放样图纸进行，所述外层放样图纸中双面浸酚醛树脂胶预浸料的长×宽为1950mm×1400mm，所述4#大面以3个为一排沿宽度方向交错分布三排；
步骤二、铺盔：将步骤一中得到的1#大面，2#小面，3#小面和4#大面在铺盔模具上进行铺盔和初步定型，得到盔壳；所述铺盔和初步定型的过程为：在铺盔模具的阳模上每铺2层1#大面，铺1层3#小面，共铺1#大面10层和3#小面5层，然后继续铺2层1#大面，铺1层2#小面，最后铺1层1#大面，直至总计19层，再在最外层铺放1层4#大面，其中相邻的1#大面之间的开口错开45°，且1#大面，2#小面，3#小面和4#大面同心铺放，在每层铺放后，均使铺盔模具的阳模上升顶紧铺盔模具的阴模进行初步定型；所述初步定型的参数：压力为0.7MPa，铺盔模具阳模的温度为80℃，阴模的温度为95℃，时间为6min；
步骤三、切边：将步骤二中得到的盔壳进行切边，得到切割后的盔壳；
步骤四、开放模具预加热：将步骤三中得到的切割后的盔壳放入液压机开放模具中进行预加热，得到预加热盔壳；所述预加热的参数：压力为140kg/cm 2～200kg/cm 2，开放模具上模的温度为100℃，下模的温度为90℃，时间为5min；
步骤五、开放模具预冷定型：将步骤四中得到的预加热盔壳放入液压机开放模具中进行预冷定型，得到预冷定型盔壳；所述预冷定型的参数：压力为180kg/cm 2，时间5min；
步骤六、封闭模具加热：将步骤五中得到的预冷定型盔壳放入液压机封闭模具进行封闭加热，得到封闭加热盔壳；所述封闭加热的参数：压力为170kg/cm 2，封闭模具上模的温度为170℃，下模的温度为160℃，时间 为20min，其中封闭加热2min后打开封闭模具进行放气，放气的次数为4次，每次的放气时间为1.5min，继续保压8min；
步骤七、封闭模具冷定型：将步骤六中得到的封闭加热盔壳放入液压机开放模具进行封闭冷定型，得到封闭冷定型盔壳；所述封闭冷定型的参数：压力为200kg/cm 2，时间为8min；
步骤八、打孔：将步骤七中得到的封闭冷定型盔壳进行钻孔，得到钻孔盔壳；
步骤九、内外表面处理：将步骤八中得到的钻孔盔壳的内外表面进行清洁，得到清洁盔壳；
步骤十、黏封边胶条：将步骤九中得到的清洁盔壳的边沿黏封边胶条，然后进行打磨，得到封边盔壳；
步骤十一、喷涂聚脲：将步骤十中得到的封边盔壳表面喷涂聚脲，得到喷涂盔壳；所述聚脲为双组分特种聚脲防护材料1401，所述喷涂聚脲的条件为：采用聚脲喷涂机，喷涂温度为80℃，喷涂压力为1400psi，喷涂圈数5圈，转数6r/min，喷涂宽度为10mm，厚度为0.7mm；
步骤十二、装配悬挂系统和帽套：将步骤十一中得到的喷涂盔壳依次安装悬挂系统和帽套，得到多曲面防弹头盔。
步骤十三、包装：将步骤十二中得到的防弹头盔的紧急脱扣扣合，头围调整器调至最大，然后把产品合格证、产品使用维护说明书、干燥剂一起放入头盔内，用拷贝纸包好装入聚乙烯塑料袋内，然后封口，按5顶一摞侧向放入内包装箱中。把两件内包装箱放入外包装箱中，在箱内上部放入“包装检验单”，外包装采用聚丙烯塑料打包带沿井字形方向扎紧，要求打正、牢固、松紧适度；加固包装应在纸箱外增包聚丙烯塑料编制布一层。
经检测，本实施例制备的防弹头盔符合GJB5115A-2012《军用防弹头盔安全技术性能要求》中对军用安全防弹头盔的要求。
依据WHB901-2015《15武警通用头盔制造与验收技术条件》以及 GJB5115A-2012《军用防弹头盔安全技术性能要求》，对本实施例制备的防弹头盔进行射击试验，得到的结果如表1：
表1
Figure PCTCN2021130934-appb-000001
从表1中可以看出，对本实施例制备的防弹头盔从盔顶，盔前侧，盔左侧，盔右侧和盔后侧五个方向5米的距离进行射击，子弹弹头均未穿过防弹头盔，从弹痕高度也可看出弹头对防弹头盔造成的凹陷很小，说明本实施例制备的防弹头盔具有极佳的安全性。
图2是本实施例制备的1#大面1的结构示意图，从图2中可以看出，1#大面1的直径为520mm，A裁缝5的长度为199mm，B裁缝6在A裁缝5上的投影长度为119mm，B裁缝6远离A裁缝5一端到A裁缝5的垂直距离为40mm。
图3是本实施例制备的2#小面2的结构示意图，从图3中可以看出，2#小面2直径为180mm。
图4是本实施例制备的3#小面3的结构示意图，从图4中可以看出，3#小面3直径为140mm。
图5是本实施例制备的4#大面4的结构示意图，从图5中可以看出，4#大面4与1#大面1的尺寸开口完全相同。
图6是本实施例的内层放样图纸，从图6中可以看出，单面浸酚醛树脂胶预浸料7的长×宽为1950mm×1400mm，所述1#大面1以3个为一排 沿宽度方向交错分布三排，间隙处分布8个2#小面2和8个3#小面3。
图7是本实施例的外层放样图纸，从图7中可以看出，双面浸酚醛树脂胶预浸料8的长×宽为1950mm×1400mm，4#大面4以3个为一排沿宽度方向交错分布三排。
图8是本实施例制备的多曲面防弹头盔的结构示意图，从图8中可以看出，本实施例制备的多曲面防弹头盔，成多曲面状，对头部进行有效覆盖。
实施例2
本实施例包括以下步骤：
步骤一、放样切割：将单面浸酚醛树脂胶预浸料进行裁剪，得到1#大面，2#小面和3#小面；所述1#大面，2#小面和3#小面均为圆形，所述1#大面上均匀分布有四个开口，所述开口均包括A裁缝和B裁缝，所述A裁缝位于1#大面两条互相垂直的直径上，从圆外侧向圆心延伸且长度小于半径，所述B裁缝位于A裁缝的逆时针侧，从圆外侧向A裁缝延伸且与A裁缝具有一定夹角；将双面浸酚醛树脂胶预浸料进行裁剪，得到4#大面；所述4#大面的形状与开口均与1#大面相同；所述单面浸酚醛树脂胶预浸料的单位克重为290克/平方米，厚度为0.35mm～0.45mm，含胶量为12％；所述双面浸酚醛树脂胶预浸料的单位克重为420克/平方米，厚度为0.63mm～0.73mm，含胶量为24％；所述1#大面的直径为520mm，A裁缝的长度为199mm，B裁缝在A裁缝上的投影长度为119mm，B裁缝远离A裁缝一端到A裁缝的垂直距离为40mm，2#小面直径为180mm，3#小面直径为140mm，所述4#大面的尺寸与1#大面相同；所述单面浸酚醛树脂胶预浸料进行裁剪根据内层放样图纸进行，所述内层放样图纸中单面浸酚醛树脂胶预浸料的长×宽为1950mm×1400mm，所述1#大面以3个为一排沿宽度方向交错分布三排，间隙处分布8个2#小面和8个3#小面；所述双面浸酚醛树脂胶预浸料进行裁剪根据外层放样图纸进行，所述外层放样 图纸中双面浸酚醛树脂胶预浸料的长×宽为1950mm×1400mm，所述4#大面以3个为一排沿宽度方向交错分布三排；
步骤二、铺盔：将步骤一中得到的1#大面，2#小面，3#小面和4#大面在铺盔模具上进行铺盔和初步定型，得到盔壳；所述铺盔和初步定型的过程为：在铺盔模具的阳模上每铺2层1#大面，铺1层3#小面，共铺1#大面10层和3#小面5层，然后继续铺2层1#大面，铺1层2#小面，最后铺1层1#大面，直至总计19层，再在最外层铺放1层4#大面，其中相邻的1#大面之间的开口错开45°，且1#大面，2#小面，3#小面和4#大面同心铺放，在每层铺放后，均使铺盔模具的阳模上升顶紧铺盔模具的阴模进行初步定型；所述初步定型的参数：压力为0.7MPa，铺盔模具阳模的温度为80℃，阴模的温度为95℃，时间为5min；
步骤三、切边：将步骤二中得到的盔壳进行切边，得到切割后的盔壳；
步骤四、开放模具预加热：将步骤三中得到的切割后的盔壳放入液压机开放模具中进行预加热，得到预加热盔壳；所述预加热的参数：压力为200kg/cm 2，开放模具上模的温度为100℃，下模的温度为90℃，时间为5min；
步骤五、开放模具预冷定型：将步骤四中得到的预加热盔壳放入液压机开放模具中进行预冷定型，得到预冷定型盔壳；所述预冷定型的参数：压力为140kg/cm 2，时间5min；
步骤六、封闭模具加热：将步骤五中得到的预冷定型盔壳放入液压机封闭模具进行封闭加热，得到封闭加热盔壳；所述封闭加热的参数：压力为180kg/cm 2，封闭模具上模的温度为170℃，下模的温度为160℃，时间为20min，其中封闭加热1min后打开封闭模具进行放气，放气的次数为5次，每次的放气时间为1min，继续保压10min；
步骤七、封闭模具冷定型：将步骤六中得到的封闭加热盔壳放入液压机开放模具进行封闭冷定型，得到封闭冷定型盔壳；所述封闭冷定型的参 数：压力为200kg/cm 2，时间为8min；
步骤八、打孔：将步骤七中得到的封闭冷定型盔壳进行钻孔，得到钻孔盔壳；
步骤九、内外表面处理：将步骤八中得到的钻孔盔壳的内外表面进行清洁，得到清洁盔壳；
步骤十、黏封边胶条：将步骤九中得到的清洁盔壳的边沿黏封边胶条，然后进行打磨，得到封边盔壳；
步骤十一、喷涂聚脲：将步骤十中得到的封边盔壳表面喷涂聚脲，得到喷涂盔壳；所述聚脲为双组分特种聚脲防护材料1401，所述喷涂聚脲的条件为：采用聚脲喷涂机，喷涂温度为80℃，喷涂压力为1400psi，喷涂圈数5圈，转数6r/min，喷涂宽度为10mm，厚度为0.8mm；
步骤十二、装配悬挂系统和帽套：将步骤十一中得到的喷涂盔壳依次安装悬挂系统和帽套，得到多曲面防弹头盔。
步骤十三、包装：将步骤十二中得到的防弹头盔的紧急脱扣扣合，头围调整器调至最大，然后把产品合格证、产品使用维护说明书、干燥剂一起放入头盔内，用拷贝纸包好装入聚乙烯塑料袋内，然后封口，按5顶一摞侧向放入内包装箱中。把两件内包装箱放入外包装箱中，在箱内上部放入“包装检验单”，外包装采用聚丙烯塑料打包带沿井字形方向扎紧，要求打正、牢固、松紧适度；加固包装应在纸箱外增包聚丙烯塑料编制布一层。
经检测，本实施例制备的防弹头盔符合GJB5115A-2012《军用防弹头盔安全技术性能要求》中对军用安全防弹头盔的要求。
实施例3
本实施例包括以下步骤：
步骤一、放样切割：将单面浸酚醛树脂胶预浸料进行裁剪，得到1#大面，2#小面和3#小面；所述1#大面，2#小面和3#小面均为圆形，所述1#大面上均匀分布有四个开口，所述开口均包括A裁缝和B裁缝，所述A 裁缝位于1#大面两条互相垂直的直径上，从圆外侧向圆心延伸且长度小于半径，所述B裁缝位于A裁缝的逆时针侧，从圆外侧向A裁缝延伸且与A裁缝具有一定夹角；将双面浸酚醛树脂胶预浸料进行裁剪，得到4#大面；所述4#大面的形状与开口均与1#大面相同；所述单面浸酚醛树脂胶预浸料的单位克重为290克/平方米，厚度为0.35mm～0.45mm，含胶量为12％；所述双面浸酚醛树脂胶预浸料的单位克重为420克/平方米，厚度为0.63mm～0.73mm，含胶量为24％；所述1#大面的直径为520mm，A裁缝的长度为199mm，B裁缝在A裁缝上的投影长度为119mm，B裁缝远离A裁缝一端到A裁缝的垂直距离为40mm，2#小面直径为180mm，3#小面直径为140mm，所述4#大面的尺寸与1#大面相同；所述单面浸酚醛树脂胶预浸料进行裁剪根据内层放样图纸进行，所述内层放样图纸中单面浸酚醛树脂胶预浸料的长×宽为1950mm×1400mm，所述1#大面以3个为一排沿宽度方向交错分布三排，间隙处分布8个2#小面和8个3#小面；所述双面浸酚醛树脂胶预浸料进行裁剪根据外层放样图纸进行，所述外层放样图纸中双面浸酚醛树脂胶预浸料的长×宽为1950mm×1400mm，所述4#大面以3个为一排沿宽度方向交错分布三排；
步骤二、铺盔：将步骤一中得到的1#大面，2#小面，3#小面和4#大面在铺盔模具上进行铺盔和初步定型，得到盔壳；所述铺盔和初步定型的过程为：在铺盔模具的阳模上每铺2层1#大面，铺1层3#小面，共铺1#大面10层和3#小面5层，然后继续铺2层1#大面，铺1层2#小面，最后铺1层1#大面，直至总计19层，再在最外层铺放1层4#大面，其中相邻的1#大面之间的开口错开45°，且1#大面，2#小面，3#小面和4#大面同心铺放，在每层铺放后，均使铺盔模具的阳模上升顶紧铺盔模具的阴模进行初步定型；所述初步定型的参数：压力为0.7MPa，铺盔模具阳模的温度为80℃，阴模的温度为95℃，时间为8min；
步骤三、切边：将步骤二中得到的盔壳进行切边，得到切割后的盔壳；
步骤四、开放模具预加热：将步骤三中得到的切割后的盔壳放入液压机开放模具中进行预加热，得到预加热盔壳；所述预加热的参数：压力为140kg/cm 2，开放模具上模的温度为100℃，下模的温度为90℃，时间为5min；
步骤五、开放模具预冷定型：将步骤四中得到的预加热盔壳放入液压机开放模具中进行预冷定型，得到预冷定型盔壳；所述预冷定型的参数：压力为200kg/cm 2，时间5min；
步骤六、封闭模具加热：将步骤五中得到的预冷定型盔壳放入液压机封闭模具进行封闭加热，得到封闭加热盔壳；所述封闭加热的参数：压力为160kg/cm 2，封闭模具上模的温度为170℃，下模的温度为160℃，时间为20min，其中封闭加热3min后打开封闭模具进行放气，放气的次数为3次，每次的放气时间为2min，继续保压5min；
步骤七、封闭模具冷定型：将步骤六中得到的封闭加热盔壳放入液压机开放模具进行封闭冷定型，得到封闭冷定型盔壳；所述封闭冷定型的参数：压力为200kg/cm 2，时间为8min；
步骤八、打孔：将步骤七中得到的封闭冷定型盔壳进行钻孔，得到钻孔盔壳；
步骤九、内外表面处理：将步骤八中得到的钻孔盔壳的内外表面进行清洁，得到清洁盔壳；
步骤十、黏封边胶条：将步骤九中得到的清洁盔壳的边沿黏封边胶条，然后进行打磨，得到封边盔壳；
步骤十一、喷涂聚脲：将步骤十中得到的封边盔壳表面喷涂聚脲，得到喷涂盔壳；所述聚脲为双组分特种聚脲防护材料1401，所述喷涂聚脲的条件为：采用聚脲喷涂机，喷涂温度为80℃，喷涂压力为1400psi，喷涂圈数5圈，转数6r/min，喷涂宽度为10mm，厚度为0.5mm；
步骤十二、装配悬挂系统和帽套：将步骤十一中得到的喷涂盔壳依次 安装悬挂系统和帽套，得到多曲面防弹头盔。
步骤十三、包装：将步骤十二中得到的防弹头盔的紧急脱扣扣合，头围调整器调至最大，然后把产品合格证、产品使用维护说明书、干燥剂一起放入头盔内，用拷贝纸包好装入聚乙烯塑料袋内，然后封口，按5顶一摞侧向放入内包装箱中。把两件内包装箱放入外包装箱中，在箱内上部放入“包装检验单”，外包装采用聚丙烯塑料打包带沿井字形方向扎紧，要求打正、牢固、松紧适度；加固包装应在纸箱外增包聚丙烯塑料编制布一层。
经检测，本实施例制备的防弹头盔符合GJB5115A-2012《军用防弹头盔安全技术性能要求》中对军用安全防弹头盔的要求。
以上所述，仅是本发明的较佳实施例，并非对本发明作任何限制。凡是根据发明技术实质对以上实施例所作的任何简单修改、变更以及等效变化，均仍属于本发明技术方案的保护范围内。

Claims (10)

  1. 一种多曲面防弹头盔成型方法，其特征在于，该方法包括以下步骤：
    步骤一、放样切割：将单面浸酚醛树脂胶预浸料进行裁剪，得到1#大面，2#小面和3#小面；所述1#大面，2#小面和3#小面均为圆形，所述1#大面上均匀分布有四个开口，所述开口均包括A裁缝和B裁缝，所述A裁缝位于1#大面两条互相垂直的直径上，从圆外侧向圆心延伸且长度小于半径，所述B裁缝位于A裁缝的逆时针侧，从圆外侧向A裁缝延伸且与A裁缝具有一定夹角；将双面浸酚醛树脂胶预浸料进行裁剪，得到4#大面；所述4#大面的形状与开口均与1#大面相同；
    步骤二、铺盔：将步骤一中得到的1#大面，2#小面，3#小面和4#大面在铺盔模具上进行铺盔和初步定型，得到盔壳；所述铺盔和初步定型的过程为：在铺盔模具的阳模上每铺2层1#大面，铺1层3#小面，共铺1#大面10层和3#小面5层，然后继续铺2层1#大面，铺1层2#小面，最后铺1层1#大面，直至总计19层，再在最外层铺放1层4#大面，其中相邻的1#大面之间的开口错开45°，且1#大面，2#小面，3#小面和4#大面同心铺放，在每层铺放后，均使铺盔模具的阳模上升顶紧铺盔模具的阴模进行初步定型；
    步骤三、切边：将步骤二中得到的盔壳进行切边，得到切割后的盔壳；
    步骤四、开放模具预加热：将步骤三中得到的切割后的盔壳放入液压机开放模具中进行预加热，得到预加热盔壳；
    步骤五、开放模具预冷定型：将步骤四中得到的预加热盔壳放入液压机开放模具中进行预冷定型，得到预冷定型盔壳；
    步骤六、封闭模具加热：将步骤五中得到的预冷定型盔壳放入液压机封闭模具进行封闭加热，得到封闭加热盔壳；
    步骤七、封闭模具冷定型：将步骤六中得到的封闭加热盔壳放入液压 机开放模具进行封闭冷定型，得到封闭冷定型盔壳；
    步骤八、打孔：将步骤七中得到的封闭冷定型盔壳进行钻孔，得到钻孔盔壳；
    步骤九、内外表面处理：将步骤八中得到的钻孔盔壳的内外表面进行清洁，得到清洁盔壳；
    步骤十、黏封边胶条：将步骤九中得到的清洁盔壳的边沿黏封边胶条，然后进行打磨，得到封边盔壳；
    步骤十一、喷涂聚脲：将步骤十中得到的封边盔壳表面喷涂聚脲，得到喷涂盔壳；
    步骤十二、装配悬挂系统和帽套：将步骤十一中得到的喷涂盔壳依次安装悬挂系统和帽套，得到多曲面防弹头盔。
  2. 根据权利要求1所述的一种多曲面防弹头盔成型方法，其特征在于，步骤一中所述单面浸酚醛树脂胶预浸料的单位克重为290克/平方米，厚度为0.35mm～0.45mm，含胶量为12％；所述双面浸酚醛树脂胶预浸料的单位克重为420克/平方米，厚度为0.63mm～0.73mm，含胶量为24％。
  3. 根据权利要求1所述的一种多曲面防弹头盔成型方法，其特征在于，步骤一中所述1#大面的直径为520mm，A裁缝的长度为199mm，B裁缝在A裁缝上的投影长度为119mm，B裁缝远离A裁缝一端到A裁缝的垂直距离为40mm，2#小面直径为180mm，3#小面直径为140mm，所述4#大面的尺寸与1#大面相同。
  4. 根据权利要求1所述的一种多曲面防弹头盔成型方法，其特征在于，步骤一中所述单面浸酚醛树脂胶预浸料进行裁剪根据内层放样图纸进行，所述内层放样图纸中单面浸酚醛树脂胶预浸料的长×宽为1950mm×1400mm，所述1#大面以3个为一排沿宽度方向交错分布三排，间隙处分布8个2#小面和8个3#小面；所述双面浸酚醛树脂胶预浸料进行裁剪根据外层放样图纸进行，所述外层放样图纸中双面浸酚醛树脂胶预 浸料的长×宽为1950mm×1400mm，所述4#大面以3个为一排沿宽度方向交错分布三排。
  5. 根据权利要求1所述的一种多曲面防弹头盔成型方法，其特征在于，步骤二中所述初步定型的参数：压力为0.7MPa，铺盔模具阳模的温度为80℃，阴模的温度为95℃，时间为5min～8min。
  6. 根据权利要求1所述的一种多曲面防弹头盔成型方法，其特征在于，步骤四中所述预加热的参数：压力为140kg/cm 2～200kg/cm 2，开放模具上模的温度为100℃，下模的温度为90℃，时间为5min。
  7. 根据权利要求1所述的一种多曲面防弹头盔成型方法，其特征在于，步骤五中所述预冷定型的参数：压力为140kg/cm 2～200kg/cm 2，时间5min。
  8. 根据权利要求1所述的一种多曲面防弹头盔成型方法，其特征在于，步骤六中所述封闭加热的参数：压力为160kg/cm 2～180kg/cm 2，封闭模具上模的温度为170℃，下模的温度为160℃，时间为20min，其中封闭加热1min～3min后打开封闭模具进行放气，放气的次数为3～5次，每次的放气时间为1min～2min，继续保压5min～10min。
  9. 根据权利要求1所述的一种多曲面防弹头盔成型方法，其特征在于，步骤七中所述封闭冷定型的参数：压力为200kg/cm 2，时间为8min。
  10. 根据权利要求1所述的一种多曲面防弹头盔成型方法，其特征在于，步骤十一中所述聚脲为双组分特种聚脲防护材料1401，所述喷涂聚脲的条件为：采用聚脲喷涂机，喷涂温度为80℃，喷涂压力为1400psi，喷涂圈数5圈，转数6r/min，喷涂宽度为10mm，厚度为0.5mm～0.8mm。
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