Bulletproof helmet shell with shuttle weaving structure
By adopting interlayer bonding technology with shuttle-woven structure in bulletproof helmets, the problem of lack of effective bonding of existing bulletproof helmet structures is solved, and the effect of improving the bulletproof performance of the helmet body without increasing thickness and weight is achieved.
Patent Information
- Application Number
- CN202422146248.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-03
AI Technical Summary
The helmet shell structure of existing bulletproof helmets lacks effective interlayer constraints, which leads to interlayer shear cracking and large-area deformation easily after the bullet is fired, affecting the protective performance.
The shuttle-woven structure is adopted to cut bulletproof materials into petal shapes, and the three-dimensional cross-wire structure is introduced into interlayer bonds, increasing the response area of the helmet shell during blasting and absorbing more energy from the bullet body.
Through the introduction of interlayer binding layers, the kinetic energy at the hit is effectively transmitted, so that each layer of weft-free cloth units participate in the energy-removing operation, improve the overall bulletproof performance of the helmet body, and reduce the height of the bullet mark and appearance damage.
Smart Images
Figure CN223037022U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of non - metallic bulletproof helmets, and in particular to a bulletproof helmet shell with a tricot structure. Background Art
[0002] With the continuous increase in the muzzle velocity of bullet projectiles in modern warfare, the existing bulletproof helmets also need to synchronously improve their bulletproof performance. However, the improvement of bulletproof performance usually results in an increase in the mass of the helmet shell, imposing a relatively large weight burden on the wearer. Ultra - high - molecular - weight polyethylene fiber (PE) in non - metallic materials not only has the properties of high strength and high modulus but also has the advantage of low density compared with other high - performance fibers. Therefore, PE fiber is the preferred material for making non - metallic bulletproof helmets in the existing technology.
[0003] Currently, the shell structure of bulletproof helmets mostly forms a laminated structure that is stacked layer by layer through a structural method of laying four - petal or eight - petal helmet prepreg units. There is no three - dimensional structure of connection and restraint between layers. In the actual use process, PE fiber has the characteristic of relatively high elongation at break. The bulletproof helmet made of it as the main material has the phenomenon that the height of the bullet mark on the shell is relatively larger than that of the aramid - based helmet after being shot. Moreover, due to the lack of an effective inter - layer restraint structure between layers, when hit by a bullet or fragment, it is easy to generate inter - layer shear cracking, causing large deformation of the helmet and affecting the protection performance.
[0004] In order to effectively control dents and prevent misalignment, the inter - layer sewing structure is a commonly used technical means in the existing technology. Through the connection method of sewing threads, the PE non - woven fabric is sewn and fixed in the thickness direction. Although the connection of this sewing structure can increase the inter - layer restraint, the multiple sewing points cause overlapping pores (pinholes) in the multi - layer non - woven fabric after threading the needle, which is easy to generate a penetration effect when hit by a bullet. Moreover, the sewing structure formed by threading the needle will also cause certain physical damage to the PE yarn, forming a weak area for bulletproofing. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a bulletproof helmet shell with a tricot structure. By cutting the bulletproof material into petal - like shapes and introducing inter - layer restraint using the tricot structure, the response area of the helmet to impact during bullet hitting is increased. This tricot structure can enable more bulletproof materials to participate and absorb more bullet energy, thereby reducing the height of the bullet mark after bullet hitting. The structure design of the helmet shell is optimized, reasonable, safe and reliable.
[0006] To achieve the above purpose, the utility model provides the following technical solutions:
[0007] A bulletproof helmet shell with a tricot structure, comprising: a protective layer and an inter - layer restraint layer;
[0008] The protective layer includes: multiple non-woven fabric units; each layer of non-woven fabric unit adopts a petal-shaped structure, and through a stacked structural method, the protective layer is formed;
[0009] The interlayer binding layer is a rectangular non-woven fabric; through a connecting method of tatting, it is arranged between the multiple non-woven fabric units, and through a three-dimensional cross tatting structure, each layer of non-woven fabric unit is connected into an organic whole;
[0010] As an example, the petal-shaped structure is four-petal, five-petal, six-petal or eight-petal.
[0011] As an example, when the petal-shaped structure is six-petal, the multiple non-woven fabric units are six-layer non-woven fabric units; when the petal-shaped structure is eight-petal, the multiple non-woven fabric units are eight-layer non-woven fabric units; and so on.
[0012] As an example, the interlayer binding layer means: through the rectangular non-woven fabric, along the circumferential direction around the helmet when it is placed horizontally, it is laminated on one petal of the petal-shaped structure of different layers of non-woven fabric units, and one round is a group. Through the tatting structure method of alternately laminating the petals, each layer of non-woven fabric unit is tatted into an organic whole. (That is, the interlayer binding layer passes through one petal of each layer of non-woven fabric unit in a tatting manner, and one round is a group, forming a three-dimensional binding; )
[0013] As an example, in order to save manufacturing costs, the length of the rectangular non-woven fabric is slightly larger than the size of the circumferential direction around the helmet when it is placed horizontally.
[0014] As an example, in order to save manufacturing costs, the width of the rectangular non-woven fabric is equal to 1 / 2 of the difference between the length of the arc connection above the front and rear symmetric midpoints of the lower edge of the helmet when the helmet is placed horizontally and the length of the uncut part in the middle of the petal-shaped structure;
[0015] That is:
[0016] B = 1 / 2×(L - d);
[0017] Wherein, B is the width of the rectangular non-woven fabric, L is the length of the arc connection above the front and rear symmetric midpoints of the lower edge of the helmet when the helmet is placed horizontally; d is the length of the uncut part in the middle of the petal-shaped structure.
[0018] The beneficial effects of the present utility model:
[0019] Through the three-dimensional cross-laid tricot structure between different layers, the utility model effectively binds the non-woven fabric units of different layers of the helmet shell protection layer. When a bullet or fragment hits the helmet shell protection layer, the interlayer binding layer can transfer the kinetic energy at the hit point to each non-woven fabric unit of the overall protection layer through the three-dimensional cross-laid tricot structure, enabling each non-woven fabric unit of each layer to participate in the energy dissipation operation of the impact kinetic energy, thereby achieving the improvement of the overall bulletproof performance of the helmet body without increasing the thickness and weight.
[0020] Due to the adoption of the three-dimensional cross-laid tricot structure, when a bullet or fragment hits the helmet shell protection layer, each non-woven fabric unit of each layer participates in the tensile energy dissipation of the impact kinetic energy, enabling each non-woven fabric unit of each layer, down to each elastic fiber of each non-woven fabric unit of each layer, to participate through the tricot structure, forming a powerful organic whole. This structure greatly reduces the elastic deformation at the hit point of the traditional helmet body, reduces the external shape damage of the helmet, and the reduction of elastic deformation will further act on the effective protection of the wearer.
[0021] The structure of the utility model is ingeniously designed and has a low cost. By introducing the interlayer binding layer structure, the helmet shell response area to bullet impact is greatly increased (similar to the effect of affecting the whole by pulling one hair), the elastic deformation of the fiber is restricted, the bullet mark height of the bullet impact is significantly reduced, and the precise size of the interlayer binding layer further reduces the usage amount of the rectangular non-woven fabric, making it suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of a petal structure with five petals for each non-woven fabric unit of each layer of the bulletproof helmet shell with a tricot structure of the utility model.
[0023] Figure 2 It is a side view of the helmet body of the bulletproof helmet shell with a tricot structure of the utility model placed horizontally.
[0024] Figure 3 It is a schematic diagram of the tricot structure of the protection layer and the interlayer binding layer of the bulletproof helmet shell with a tricot structure of the utility model (5-layer petals).
[0025] Figure 4 It is another schematic diagram of the tricot structure of the protection layer and the interlayer binding layer of the bulletproof helmet shell with a tricot structure of the utility model in Embodiment 3 (5-layer petals). DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] The preferred embodiments of the utility model will be described in detail below with reference to the accompanying drawings.
[0027] Referring to Figures 1 to 4 as shown, a bulletproof helmet shell with a tricot structure includes: a protection layer 101 and an interlayer binding layer 102;
[0028] The protective layer 101 includes: multiple layers of non-woven fabric units; each layer of non-woven fabric unit adopts a petal-shaped structure, and through a stacked structural manner, the protective layer is formed;
[0029] The interlayer binding layer 102 is a rectangular non-woven fabric; through a linking method of tatting, it is arranged between the multiple layers of non-woven fabric units, and through a three-dimensional cross tatting structure, each layer of non-woven fabric unit is connected into an organic whole;
[0030] As an example, the petal-shaped structure is four-petal, five-petal, six-petal or eight-petal.
[0031] Refer to Figure 1 As shown, as an example, when the petal-shaped structure is a five-petal petal-shaped structure, the five-petal petal-shaped structure means that the uncut part in the middle is a circular structure, and the cut part on the outside forms five fan-shaped gap structures that are equally spaced and have the same shape and size, so that the remaining uncut part on the outside forms five petal-shaped fan-shaped rings with the same shape and size. The inner edges of the five petal-shaped fan-shaped rings are sequentially connected to the outside of the circular structure to form a whole.
[0032] As an example, when the petal-shaped structure is six-petal, the multiple layers of non-woven fabric units are six layers of non-woven fabric units; when the petal-shaped structure is eight-petal, the multiple layers of non-woven fabric units are eight layers of non-woven fabric units; and so on, that is, the number of petals of the petal-shaped structure is the same as the number of layers.
[0033] As an example, the interlayer binding layer 102 means that through the rectangular non-woven fabric, along the circumferential direction around the helmet when it is placed horizontally, it is laminated on one petal of the petal-shaped structure of different layers of non-woven fabric units, and through the tatting structure method of alternately laminating the petals, each layer of non-woven fabric unit is tatted into an organic whole.
[0034] As an example, in order to save manufacturing costs, the length of the rectangular non-woven fabric is slightly larger than the size of the circumferential direction around the helmet when it is placed horizontally.
[0035] As an example, in order to save manufacturing costs, the width of the rectangular non-woven fabric is equal to 1 / 2 of the difference between the length of the arc connection line above the front and rear symmetric midpoints of the lower edge of the helmet when the helmet is placed horizontally and the length of the uncut part in the middle of the petal-shaped structure;
[0036] That is:
[0037] B = 1 / 2×(L - d);
[0038] Wherein, B is the width of the rectangular non-woven fabric, L is the length of the arc connecting the front and rear symmetrical midpoints of the lower edge of the helmet when the helmet body is placed horizontally, and d is the length of the uncut part in the middle of the petal-shaped structure, refer to Figure 1 shown.
[0039] In order to better illustrate the principles and advantages of the present invention, the following further describes the specific parameters and other contents involved in the present invention in conjunction with the accompanying drawings and embodiments.
[0040] Embodiment 1:
[0041] The protective layer 101 and the interlayer binding layer 102 of the bulletproof helmet are made; the raw materials used are ultra-high molecular weight polyethylene non-woven fabric (referred to as PE non-woven fabric), and can also be aramid non-woven fabric, carbon fiber non-woven fabric;
[0042] The surface density of PE non-woven fabric is 40-400g / ㎡, and the rubber content is 7-25%.
[0043] The thickness of the bulletproof helmet is 5mm-20mm;
[0044] The shape of the single-layer PE non-woven fabric can be four-petal, five-petal, six-petal, eight-petal, etc.
[0045] The shape of the PE non-woven fabric of the interlayer binding layer 102 is a rectangle, and the width of the rectangle is 1 / 2 of the difference between the length of the outer arc connecting the front and rear midpoints of the helmet and the length of the uncut part in the middle of the petals.
[0046] Embodiment 2: When each layer of non-weft fabric units is stacked alternately, refer to the attached manual Figure 3 As shown; the steps for preparing a bulletproof helmet shell of a shuttle-woven structure of the utility model include:
[0047] Step 1, cutting: designing the size of the petal-shaped structure of each layer of the non-woven fabric unit and the size of the interlayer binding layer 102 according to the size of the helmet;
[0048] Step 2: Tatting structure design:
[0049] The five-layer non-weft fabric unit corresponds to a five-petal petal structure. The interlayer binding layer is woven through one petal per layer to form a progressive cross structure, which is a group of one circle to form a three-dimensional binding; (At this time, each layer of non-weft fabric unit is staggered and stacked)
[0050] Step 3, laying: According to the structural design, fix the protective layer and interlayer binding layer materials on the helmet laying tooling, and set the parameters as: temperature 80-100℃, pressure 3-10mpa.
[0051] Step 4. Pre-pressing: Transfer the blank after laying to the pre-pressing die for pre-pressing. The pre-pressing parameters are: temperature 100 - 120°C, pressure 5 - 15 Mpa, time 1 - 5 minutes. After pressing, trim the scraps at the corners.
[0052] Step 5. Hot-pressing: Transfer the pre-pressed helmet blank to the hot-pressing die for hot-pressing. The parameters are: temperature 115 - 135°C, pressure 10 - 20 mpa, time 15 - 25 minutes.
[0053] Step 6. Cold-pressing: After the hot-pressed helmet shell is removed from the die, transfer it to the cold-pressing die for cooling. The cooling parameters are: pressure 10 - 20 mpa, temperature 25 - 50°C, time 5 - 15 minutes.
[0054] Step 7. Demoulding: Take out the cooled helmet shell in Step 6.
[0055] As an example, the interlayer binding layer can be one group or multiple groups.
[0056] Example 3: When each layer of non-woven fabric unit is placed in alignment, refer to the attached Figure 4 as shown;
[0057] The interlayer binding layer 102 is interspersed between adjacent petals in a weaving manner to form an up-and-down reciprocating cross structure. One round of winding is one group, forming a three-dimensional binding.
[0058] The utility model effectively binds different non-woven fabric units between different layers of the helmet shell protection layer through a three-dimensional cross-laid structure. When a bullet or fragment hits the helmet shell protection layer, the interlayer binding layer can effectively transfer the kinetic energy at the hitting point to each non-woven fabric unit of the overall protection layer through the three-dimensional cross-laid structure, enabling each non-woven fabric unit of each layer to participate in the energy dissipation operation of the impact kinetic energy. In this way, without increasing the thickness and weight, the overall bulletproof performance of the helmet is improved.
[0059] Due to the adoption of the three-dimensional cross-laid structure, when a bullet or fragment hits the helmet shell protection layer, each non-woven fabric unit of each layer participates in the tensile energy dissipation of the impact kinetic energy, enabling each non-woven fabric unit, down to each elastic fiber of each non-woven fabric unit of each layer, to participate through the laid structure, forming a powerful organic whole. This structure greatly reduces the elastic deformation at the hitting point of the traditional helmet body, reduces the damage to the appearance of the helmet, and the reduction of elastic deformation will further act on the effective protection of the wearer.
[0060] The above are only the preferred embodiments of the present utility model. It should be understood that the description of the above embodiments is only used to help understand the method and its core idea of the present utility model, and is not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A bulletproof helmet shell with a woven structure, characterized in that: include: Protective layer and interlayer binding layer; The protective layer comprises: a multi-layer non-woven fabric unit; Each layer of the non-wefted fabric unit adopts a petal-shaped structure, and forms the protective layer through a stacked structure; The petal-shaped structure is a five-petal petal-shaped structure, and the five-petal petal-shaped structure means that: the middle uncut part is a circular structure, and the outer cut part forms five fan-shaped gap structures that are arranged at equal intervals and have the same shape and size, so that the remaining uncut outer part forms five fan-shaped ring petals with the same shape and size, and the inner edges of the five fan-shaped ring petals are sequentially connected to the outer side of the circular structure to form a whole; The interlayer binding layer is a rectangular non-woven fabric, which is arranged between the multi-layer non-woven fabric units by a shuttle knitting connection method, and each layer of the non-woven fabric units is connected into an organic whole by a three-dimensional cross shuttle knitting structure.
2. The bulletproof helmet shell of the woven structure according to claim 1, characterized in that: The interlayer binding layer refers to: through the rectangular non-weft cloth, along the annular direction around the helmet body when it is placed horizontally, it is superimposed on one petal of the petal-like structure of different layers of non-weft cloth units, and one circle is considered as a group; through the shuttle-knitting structure method of stacking the petals at intervals, each layer of the non-weft cloth unit is shuttle-knitted into an organic whole.
3. The bulletproof helmet shell of the woven structure according to claim 1, characterized in that: The length of the rectangular non-wefted cloth is slightly larger than the dimension in the annular direction around the helmet body when the helmet body is placed horizontally.
4. The bulletproof helmet shell of the woven structure according to claim 1, characterized in that: The width of the rectangular non-woven fabric is equal to 1 / 2 of the difference between the length of the arc connecting the front and rear symmetrical midpoints of the lower edge of the helmet when the helmet body is placed horizontally and the length of the uncut part in the middle of the petal-shaped structure; That is: B = 1 / 2 × (Ld); Among them, B is the width of the rectangular non-wefted cloth, L is the length of the arc connecting the front and rear symmetrical midpoints of the lower edge of the helmet when the helmet body is placed horizontally, and d is the length of the uncut part in the middle of the petal-like structure.
5. The bulletproof helmet shell of the woven structure according to claim 1, characterized in that: The interlayer binding layers are one or more groups.
6. The bulletproof helmet shell of the woven structure according to claim 4, characterized in that: When each layer of the weft-free fabric unit is stacked in an interlaced manner, the interlayer binding layer passes through one petal in a woven manner to form a progressive cross structure, which is completed as a group to form a three-dimensional binding.
7. The bulletproof helmet shell of the woven structure according to claim 6, characterized in that: When each layer of weft-free fabric units is aligned, the interlayer binding layer is interspersed with adjacent petals in a woven manner to form an up-and-down reciprocating cross structure, which is completed as a group to form a three-dimensional binding.