Production process of seamless integrally-formed bulletproof helmet

Abstract

The invention discloses a production process of a seamless integrally-formed bulletproof helmet, belongs to the technical field of bulletproof helmets.The production process of the seamless integrally-formed bulletproof helmet aims at solving the problems that the bulletproof effect of helmets is poor, and the bulletproof performance of the helmets.The production process of the seamless integrally-formed bulletproof helmet comprises the following steps that weft yarn is laid on a head mold in a surrounding mode, and then warp yarn is placed on a knitting machine; operating a knitting machine to select a proper knitting mode, and knitting the warp yarns on the weft yarns to form a helmet prototype: performing curing molding on the helmet prototype by selecting one of hand lay-up molding, vacuum-assisted resin transfer molding or autoclave molding; cutting is conducted according to the appearance of the helmet, and redundant parts are removed; according to the bulletproof helmet, the performance of the helmet can be different through the six weaving modes, the bulletproof performance of the helmet can be improved by curing and forming the prototype helmet, the bulletproof performance of the helmet can be further improved by adopting the added helmet weaving modes, and the bulletproof effect of the helmet is enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of bulletproof helmets, and in particular relates to a production process for seamless one-piece bulletproof helmets. Background Art

[0002] Its appearance design is unique and generally presents a smooth hemispherical shape. This shape can cleverly guide and disperse the impact of incoming bullets and minimize damage to key areas of the head. In terms of material selection, it can be said to be a pursuit of excellence, often using high-strength aramid fiber or ultra-high molecular weight polyethylene fiber as the main material. These magical fibers are tougher than steel wire. After careful weaving and multi-layer compounding, combined with advanced resin curing technology, a rock-solid protective layer is created. The protective strength of bulletproof helmets is amazing. According to different protection standards, it can effectively resist bullets fired by various types of light weapons such as pistols and submachine guns. When danger comes in an instant, at the moment when the bullet hits at high speed, the buffer structure inside the helmet quickly takes effect, and cooperates with the tough shell to dissipate the huge energy of the bullet layer by layer, and resolutely prevent it from penetrating. What's more worth mentioning is that some high-end bulletproof helmets now also incorporate intelligent technology elements, such as built-in micro sensors, which can monitor the user's vital signs in real time. Once injured, an alarm can be issued immediately to buy precious time for rescue.

[0003] The existing bulletproof helmets have complex manufacturing processes and poor bulletproof effects, which reduces the bulletproof performance of the helmets.

[0004] Therefore, a production process for seamless one-piece bulletproof helmets is needed to solve the problem that the bulletproof effect of the helmets in the prior art is poor and the bulletproof performance of the helmets is reduced. Summary of the invention

[0005] The purpose of the present invention is to provide a production process for a seamless one-piece bulletproof helmet to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: A production process for a seamless one-piece bulletproof helmet comprises the following steps: S1, lay the weft yarn around the head mold, and then place the warp yarn on the weaving machine; S2. Operate the weaving machine to select a suitable weaving method, weave the warp yarn on the weft yarn, and form a prototype of the helmet; S3, curing and molding the helmet prototype by using one of hand lay-up molding, vacuum assisted resin transfer molding or autoclave molding; S4. Cut according to the shape of the helmet, remove the excess parts, and then grind it into shape; S5, spraying assembly, installing accessories to form the final helmet.

[0007] Furthermore, the weaving method includes basic deep cross-linked three-dimensional weaving, basic shallow cross-linked three-dimensional weaving, basic shallow cross-linked three-dimensional weaving, enhanced deep cross-linked three-dimensional orthogonal weaving, enhanced shallow cross-linked three-dimensional orthogonal weaving and enhanced shallow cross-linked three-dimensional orthogonal weaving.

[0008] Furthermore, the hand lay-up step includes soaking the surface of the molded helmet in resin, and manually applying the resin so that the helmet is fully soaked, and then placing the helmet in a dryer for drying for 60 minutes.

[0009] Furthermore, the vacuum-assisted resin transfer molding step includes, first, preparing a suitable mold, laying the helmet in the mold cavity, after the helmet is laid, sealing the mold and the helmet with a vacuum bag, and forming a negative pressure difference at the resin injection port by vacuuming one end of the mold, and injecting the resin into the mold cavity through a special resin injection system; since the inside of the mold is a vacuum environment, the resin can quickly infiltrate the helmet under the dual effects of the external atmospheric pressure and vacuum suction, and after the resin injection is completed, the resin is cured under preset temperature and time conditions; after the curing is completed, the mold is opened and the molded helmet is demolded and taken out.

[0010] Furthermore, the autoclave molding step includes laying the helmet impregnated with resin on the mold in advance and then placing it into the autoclave; the autoclave can provide a uniform temperature and pressure environment. Under the action of high temperature and high pressure, the resin flows and fully impregnates the helmet, and a curing reaction occurs at the same time, finally forming a high-quality helmet.

[0011] Furthermore, the resin is one of epoxy resin, unsaturated polyester resin or phenolic resin.

[0012] Compared with the prior art, the production process of the seamless one-piece bulletproof helmet provided by the present invention has at least the following beneficial effects: By setting up six weaving methods, the performance of the helmet can be differentiated. By solidifying the prototype helmet, the bulletproof performance of the helmet can be improved. By adopting additional helmet weaving methods, the bulletproof performance of the helmet can be further improved, thereby enhancing the bulletproof effect of the helmet. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a helmet according to the present invention; Figure 2 It is a schematic diagram of the structures corresponding to the three basic weaving methods of the present invention; Figure 3 Schematic diagram of the structures corresponding to the three enhanced weaving methods of the present invention; Figure 4 It is a schematic diagram of the three-dimensional orthogonal structure of the organizational structure of the present invention. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. It should be noted that, in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined, separated, interchanged and / or rearranged with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0015] In the accompanying drawings, the size and relative size of components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments may be implemented differently, a specific process sequence may be performed in a different order than described. For example, two successively described processes may be performed substantially simultaneously or in an order opposite to the order described. In addition, the same reference numerals represent the same components.

[0016] The terms used here are for the purpose of describing specific embodiments, and are not intended to be restrictive. As used here, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, it is explained that there are stated features, integral bodies, steps, operations, parts, assemblies and / or their groups, but it is not excluded that there are or add one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups. It should also be noted that, as used here, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values ​​and / or the values ​​provided that will be recognized by those of ordinary skill in the art.

[0017] See also Figure 1-Figure 4 The present invention provides a production process for a seamless one-piece bulletproof helmet, comprising the following steps: S1, lay the weft yarn around the head mold, and then place the warp yarn on the weaving machine; S2. Operate the weaving machine to select a suitable weaving method, weave the warp yarn on the weft yarn, and form a prototype of the helmet; S3, curing and molding the helmet prototype by using one of hand lay-up molding, vacuum assisted resin transfer molding or autoclave molding; S4. Cut according to the shape of the helmet, remove the excess parts, and then grind it into shape; S5, spraying assembly, installing accessories to form the final helmet.

[0018] As a further scheme of the present invention, the weaving method includes basic deep cross-linked three-dimensional weaving, basic shallow cross-linked three-dimensional weaving, basic shallow cross-linked three-dimensional weaving, enhanced deep cross-linked three-dimensional orthogonal weaving, enhanced shallow cross-linked three-dimensional orthogonal weaving and enhanced shallow cross-linked three-dimensional orthogonal weaving.

[0019] Among them, basic deep cross-linked 3D weaving, basic shallow cross-linked 3D weaving and basic shallow cross-linked 3D weaving are as follows: Figure 2 As shown, A is a basic deep cross-linked three-dimensional weaving plane structure diagram, D is a basic deep cross-linked three-dimensional weaving three-dimensional structure diagram, and H is a schematic cross-sectional diagram of the weft yarn direction of the basic deep cross-linked three-dimensional weaving; B is a planar structural diagram of a basic shallow-crossed direct-connected three-dimensional weaving machine, E is a three-dimensional structural diagram of a basic shallow-crossed direct-connected three-dimensional weaving machine, and I is a cross-sectional schematic diagram of a basic shallow-crossed direct-connected three-dimensional weaving machine in the weft yarn direction; C is a planar structural diagram of the basic shallow-intersection bend-linked three-dimensional weaving machine, F is a three-dimensional structural diagram of the basic shallow-intersection bend-linked three-dimensional weaving machine, and J is a cross-sectional schematic diagram of the basic shallow-intersection bend-linked three-dimensional weaving machine in the weft yarn direction; Enhanced deep cross-linked three-dimensional orthogonal weaving, enhanced shallow cross-linked three-dimensional orthogonal weaving and enhanced shallow cross-linked three-dimensional orthogonal weaving such as Figure 3 As shown, A is a planar structural diagram of the enhanced deep cross-linked three-dimensional orthogonal weaving, D is a three-dimensional structural diagram of the enhanced deep cross-linked three-dimensional orthogonal weaving, and H is a cross-sectional schematic diagram of the enhanced deep cross-linked three-dimensional orthogonal weaving in the weft direction; B is a planar structural diagram of the enhanced shallow-cross direct-connected three-dimensional orthogonal weaving, E is a three-dimensional structural diagram of the enhanced shallow-cross direct-connected three-dimensional orthogonal weaving, and I is a cross-sectional schematic diagram of the weft yarn direction of the enhanced shallow-cross direct-connected three-dimensional orthogonal weaving; C is a planar structural diagram of the enhanced shallow-cross bend three-dimensional orthogonal weaving, F is a three-dimensional structural diagram of the enhanced shallow-cross bend three-dimensional orthogonal weaving, and J is a cross-sectional schematic diagram of the enhanced shallow-cross bend three-dimensional orthogonal weaving in the weft direction; Figure 3 The horizontal lines in A, B, and C are a warp reinforcement yarn and Figure 4 It corresponds to the Z yarn in the fiberglass and is used to reinforce the yarn to improve the impact resistance.

[0020] Figure 4 The middle one is a three-dimensional orthogonal structure, in which the warp and weft yarns are fixed by Z yarns. F1, F2, F3 and F4 are different structures formed by Z yarns crossing different numbers of weft yarns.

[0021] Figure 3 and Figure 4 The black dots in the figure are the weft yarns in the organization, and the wavy lines are the weaving paths of the warp yarns in the organization.

[0022] As a further solution of the present invention, the hand lay-up step includes soaking the surface of the molded helmet in resin, and manually applying the resin so that the helmet is fully soaked, and then placing the helmet in a dryer for drying for 60 minutes.

[0023] As a further scheme of the present invention, the vacuum-assisted resin transfer molding step includes, first, preparing a suitable mold, laying the helmet in the mold cavity, after the helmet is laid, sealing the mold and the helmet with a vacuum bag, and forming a negative pressure difference at the resin injection port by vacuuming one end of the mold, and injecting the resin into the mold cavity through a special resin injection system; since the interior of the mold is a vacuum environment, the resin can quickly infiltrate the helmet under the dual effects of the external atmospheric pressure and the vacuum suction, and after the resin injection is completed, the resin is cured under preset temperature and time conditions; after the curing is completed, the mold is opened and the molded helmet is demolded and taken out.

[0024] As a further solution of the present invention, the autoclave molding step includes laying the helmet impregnated with resin on a mold in advance and then placing it into an autoclave; the autoclave can provide a uniform temperature and pressure environment. Under the action of high temperature and high pressure, the resin flows and fully impregnates the helmet, and a curing reaction occurs at the same time, ultimately forming a high-quality helmet.

[0025] As a further solution of the present invention, the resin is one of epoxy resin, unsaturated polyester resin or phenolic resin.

[0026] In summary: lay the weft yarn around the head mold, and then place the warp yarn on the weaving machine; operate the weaving machine to select the appropriate weaving method, weave the warp yarn on the weft yarn to form a helmet prototype; use hand lay-up molding, vacuum-assisted resin transfer molding or autoclave molding to solidify the helmet prototype; cut according to the shape of the helmet, remove the excess parts, and then grind it into shape; spray assemble, install accessories to form the final helmet.

[0027] During weaving, different weaving methods can be selected according to the performance of the helmet, the weaving thickness can be determined according to the thickness of the helmet, and the number of three-dimensional woven layers can be determined according to the weaving thickness.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The production process of seamless one-piece bulletproof helmet is characterized by: The following steps are involved: S1, laying the weft yarn around the head mold and placing the warp yarn on the weaving machine; S2, operate the weaving machine to select a weaving method, weave the warp yarn on the weft yarn to form a prototype of the helmet; S3, curing and molding the helmet prototype by using one of hand lay-up molding, vacuum assisted resin transfer molding or autoclave molding; S4. Cut according to the shape of the helmet, remove the excess parts, and then grind it into shape; S5, spraying assembly, installing accessories to form the final helmet.

2. The production process of the seamless one-piece bulletproof helmet according to claim 1, characterized in that: The weaving methods include basic deep cross-linked three-dimensional weaving, basic shallow cross-linked three-dimensional weaving, basic shallow cross-linked three-dimensional weaving, enhanced deep cross-linked three-dimensional orthogonal weaving, enhanced shallow cross-linked three-dimensional orthogonal weaving and enhanced shallow cross-linked three-dimensional orthogonal weaving.

3. The production process of the seamless one-piece bulletproof helmet according to claim 1, characterized in that: The hand lay-up step includes: soaking the surface of the molded helmet in resin, and manually applying the resin to fully soak the helmet, and then placing the helmet in a dryer for drying for 60 minutes.

4. The production process of the seamless one-piece bulletproof helmet according to claim 1, characterized in that: The vacuum assisted resin transfer molding step includes: laying the helmet in a prepared mold cavity, and after the helmet is laid, sealing the mold and the helmet with a vacuum bag, forming a negative pressure difference at the resin injection port by evacuating one end of the mold, and injecting the resin into the mold cavity through a special resin injection system; wherein, the interior of the mold is a vacuum environment, and the resin quickly infiltrates the helmet under the dual effects of the external atmospheric pressure and the vacuum suction, and after the resin injection is completed, the resin is cured under preset temperature and time conditions; after the curing is completed, the mold is opened and the molded helmet is demolded and taken out.

5. The production process of the seamless one-piece bulletproof helmet according to claim 1, characterized in that: The autoclave molding step includes: placing the helmet impregnated with resin on a mold in advance, and then placing it in an autoclave; under the high temperature and high pressure environment provided by the autoclave, the resin flows and fully impregnates the helmet, and a curing reaction occurs at the same time, finally forming a high-quality helmet.

6. The production process of the seamless one-piece bulletproof helmet according to claim 4 or 5, characterized in that: The resin is one of epoxy resin, unsaturated polyester resin or phenolic resin.

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