A molding equipment and process for a bomb disposal helmet shell

Abstract

This invention relates to the field of helmet molding technology, and provides a molding equipment and process for explosive ordnance-venting helmet shells to solve the problem of air bubbles easily remaining between layers during hot pressing of composite prepreg laminate blanks, leading to porosity and delamination in the helmet shell. The equipment includes a frame, a lower mold, an upper mold, and a storage seat. The lower mold is fixed to the frame, and the upper mold is movably positioned above the lower mold. The storage seat is movably connected below the upper mold, with a clearance hole penetrating its center. A storage interlayer is formed on the inner wall of the clearance hole to store the blank. The storage seat can move downwards with the upper mold, allowing the lower mold to move upwards through the clearance hole. During this process, the blank is limited by the top wall of the storage interlayer and pushed upwards by the lower mold, gradually covering the outer periphery of the lower mold from the center outwards. This allows trapped gas in the blank to escape to the surrounding areas, thereby ensuring the structural integrity of the helmet shell and improving its mechanical properties and molding quality.

Description

Technical Field

[0001] This invention relates to the field of helmet molding technology, specifically to a molding equipment and process for a bomb disposal helmet shell. Background Technology

[0002] As the core protective equipment for bomb disposal personnel, bomb disposal helmets require excellent comprehensive properties such as impact resistance, penetration resistance, fatigue resistance, and lightweight design to protect against high-risk factors such as blast shock waves and high-speed flying debris. With the development of composite material technology, fiber-reinforced resin-based composite materials (such as carbon fiber and aramid fiber-reinforced resin) have gradually replaced traditional metal materials and become the mainstream raw material for manufacturing bomb disposal helmet shells due to their outstanding advantages such as high specific strength, high specific modulus, and corrosion resistance.

[0003] Currently, the molding process for composite material bomb disposal helmet shells mainly relies on prepreg lamination hot pressing. The core process involves cutting prepreg fibers according to a pre-defined layup scheme, layering them to form a preform, placing the preform in a mold, and applying specific temperature and pressure using a hot press to melt, flow, and solidify the resin, ultimately forming a helmet shell with a specific shape and performance. However, the core problem with this traditional molding process is that air bubbles easily remain between the layers during the hot pressing of the prepreg laminate preform, leading to quality issues such as porosity and delamination in the molded helmet shell.

[0004] The formation of residual air bubbles and subsequent defects mainly stems from the fact that during the prepreg layering process, air can easily be mixed in between layers due to factors such as layering operation errors and insufficient flatness of the prepreg surface. If the air is not fully discharged before hot pressing, it will expand due to heat during the subsequent heating process and form air bubbles.

[0005] The porosity and delamination defects caused by residual interlayer bubbles severely compromise the structural integrity of the helmet shell, leading to a significant reduction in its mechanical properties. Firstly, porosity reduces the effective load-bearing area of ​​the shell, exacerbating stress concentration and drastically weakening its impact and penetration resistance. Secondly, delamination defects cause interlayer peeling under external forces, resulting in overall structural failure and rendering the helmet unusable for bomb disposal personnel. Furthermore, these defects reduce the dimensional accuracy and surface quality of the helmet shell, increasing the scrap rate and production costs. Summary of the Invention

[0006] To overcome the above-mentioned defects, embodiments of the present invention provide a molding equipment and process for a bomb disposal helmet shell, which solves the technical problem that in the hot pressing process of prepreg laminated blanks in the prior art, air bubbles are easily left between the layers, resulting in problems such as pores and delamination in the molded helmet shell, which in turn causes a significant reduction in the mechanical properties and molding quality of the product.

[0007] According to one aspect, at least one embodiment of the present invention provides a molding apparatus for a bomb disposal helmet shell, comprising:

[0008] The frame has a lower mold and an upper mold that is lifted and positioned above the lower mold.

[0009] The material storage base is lifted and connected to the lower part of the upper mold. A clearance hole is opened through the middle of the material storage base for the lower mold to pass through. A material storage interlayer is opened on the inner peripheral wall of the clearance hole. The material storage interlayer is used to store the prepreg composite blank.

[0010] The material storage seat can move down with the upper mold and approach the lower mold, and cause the lower mold to pass through the clearance hole upward;

[0011] As the storage base moves downward with the upper mold, the prepreg laminate blank in the storage base can gradually adhere to and cover the outer periphery of the lower mold from the center to the outer periphery, thereby allowing the gas trapped in the prepreg laminate blank to be discharged to the surroundings.

[0012] For example, in a molding device for a bomb disposal helmet shell provided in at least one embodiment of the present invention, a feeding box extending into the storage interlayer is horizontally slidably connected to the storage seat. The feeding box has an upward-facing receiving cavity for storing prepreg composite blanks. A clearance hole is provided through the middle of the feeding box for the lower mold to pass through vertically. The clearance hole and the avoidance hole are coaxially arranged and connected.

[0013] For example, in a molding device for a bomb disposal helmet shell provided in at least one embodiment of the present invention, a clamping ring for supporting a prepreg laminate blank is slidably connected in the material cavity. The clamping ring can drive the prepreg laminate blank to move upward so as to cooperate with the top wall of the storage layer to clamp the edge of the prepreg laminate blank.

[0014] For example, in a molding device for a bomb disposal helmet shell provided in at least one embodiment of the present invention, a plurality of circumferentially distributed venting grooves are provided on the top surface of the clamping ring. The venting grooves extend radially along the clamping ring, and an abutting surface is formed between two adjacent venting grooves. The abutting surface is used to abut against the prepreg laminate blank.

[0015] For example, in a molding device for a bomb disposal helmet shell provided in at least one embodiment of the present invention, the outer end of the venting groove has a connecting section that penetrates downward through the bottom surface of the clamping ring, and the connecting section is disposed through the outer peripheral wall of the clamping ring.

[0016] For example, in a molding device for a bomb disposal helmet shell provided in at least one embodiment of the present invention, a plurality of axially extending guide grooves are provided on the inner sidewall of the material cavity, and a plurality of guide protrusions are provided on the outer periphery of the clamping ring, and the plurality of guide protrusions and the plurality of guide grooves are slidably engaged in a one-to-one correspondence.

[0017] For example, in a molding device for a bomb disposal helmet shell provided in at least one embodiment of the present invention, an electromagnetic adsorption component is provided above the material storage seat, and the clamping ring is a magnetically adsorbable component. The electromagnetic adsorption component can adsorb the clamping ring and slide it upward in the material cavity under the action of electricity.

[0018] For example, in a molding device for a bomb disposal helmet shell provided in at least one embodiment of the present invention, a plurality of upwardly extending guide rods are provided on the top of the storage seat. The guide rods pass through the upper mold and slide with the upper mold. The top of the guide rods is provided with a limiting part, which is used to abut against the top wall of the upper mold to limit the downward movement of the storage seat relative to the upper mold.

[0019] For example, in a molding device for a bomb disposal helmet shell provided in at least one embodiment of the present invention, a pushing elastic element is sleeved on the guide rod, and the two ends of the pushing elastic element abut against the upper mold and the storage seat respectively, for providing a force to move the storage seat away from the upper mold.

[0020] According to another aspect, the present invention also provides a molding process for a bomb disposal helmet shell, comprising:

[0021] S1. Material loading: Place the prepreg composite blank in the storage seat;

[0022] S2. Upper mold descends: The upper mold drives the material storage seat to descend until the lower mold passes through the clearance hole. During the above process, the prepreg laminate blank gradually adheres to and covers the outer periphery of the lower mold from the center to the outer periphery, thereby allowing the gas trapped inside the prepreg laminate blank to be discharged to the surroundings.

[0023] S3. Mold closing and forming: The upper mold continues to drive the material storage seat to move down until the upper mold and the lower mold are completely closed, so that the prepreg layer is formed into the blank.

[0024] The beneficial effects of the embodiments of the present invention are as follows:

[0025] In this invention, the frame provides a stable installation foundation for the lower mold, upper mold, and material storage seat, ensuring the overall structural stability. The lower mold and the upper mold with lifting mechanism form the basic mold structure for helmet forming, providing support for subsequent mold closing and forming.

[0026] The material storage seat is lifted and connected below the upper mold, and its clearance hole allows the lower mold to pass through smoothly. The material storage interlayer realizes the stable storage of the prepreg layer and billet.

[0027] As the material storage seat moves downward with the upper mold, the billet, under the combined action of the limiting position of the top wall of the storage interlayer and the pushing action of the lower mold, gradually covers the outer periphery of the lower mold from the center to the outer periphery. This can expel the gas trapped in the billet to the surroundings, fundamentally solving the problem of residual air bubbles in traditional processes, avoiding the appearance of pores and delamination defects in the shell after molding, ensuring the integrity of the shell structure, improving its core protective mechanical properties such as impact resistance and penetration resistance, while reducing product scrap rate and reducing production costs. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a molding device for an explosive ordnance disposal helmet shell according to one embodiment of the present invention;

[0030] Figure 2 for Figure 1 A schematic diagram of the structure of the storage base in the embodiment;

[0031] Figure 3 for Figure 1 A schematic diagram of the internal structure of the storage base in the embodiment;

[0032] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0033] Figure 5 for Figure 1 The schematic diagram of the feeding state structure of the storage seat in the embodiment is shown.

[0034] In the diagram: 1. Frame, 2. Lower mold, 3. Upper mold, 4. Material storage seat, 41. Material storage interlayer, 42. Clearance hole, 5. Material loading box, 51. Material receiving cavity, 52. Clearance hole, 6. Clamping ring, 61. Venting groove, 62. Abutting surface, 611. Connecting section, 53. Guide groove, 63. Guide protrusion, 43. Electromagnetic adsorption component, 44. Guide rod, 441. Limiting part, 45. Pushing elastic component. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0036] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0037] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0040] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] As the core protective equipment for bomb disposal personnel, bomb disposal helmets require shells with comprehensive properties such as impact resistance, penetration resistance, fatigue resistance, and lightweight design to protect against high-risk factors such as blast shock waves and high-speed flying debris. With the development of composite material technology, fiber-reinforced resin-based composite materials have gradually replaced traditional metal materials, becoming the mainstream raw material for bomb disposal helmet shells. Currently, the molding process for composite material bomb disposal helmet shells mostly uses prepreg lamination hot pressing. This process suffers from the problem of residual air bubbles between layers during the hot pressing of the prepreg laminated blank, leading to quality problems such as porosity and delamination in the molded helmet shell. This solution provides a molding equipment and process for bomb disposal helmet shells, which can effectively solve the above problems and is suitable for the industrial production of various composite material bomb disposal helmet shells.

[0042] like Figure 1As shown, the molding equipment for the bomb disposal helmet shell provided in this solution includes a frame 1, a lower mold 2, an upper mold 3, and a material storage seat 4. The frame 1 provides the mounting base for the entire molding equipment, and all components are directly or indirectly mounted on the frame 1. The lower mold 2 is fixedly located in the middle of the frame 1, and its shape matches the inner shape of the bomb disposal helmet shell. The upper mold 3 is raised and lowered directly above the lower mold 2, and its shape matches the outer shape of the bomb disposal helmet shell. To achieve the raising and lowering action of the upper mold 3, a raising and lowering drive component is installed on the frame 1. Optionally, the raising and lowering drive component is a cylinder. The cylinder body is fixed to the top of the frame 1, and the piston rod of the cylinder extends downward and is fixedly connected to the upper mold 3. The extension and retraction of the piston rod drives the upper mold 3 to move closer to or away from the lower mold 2.

[0043] The material storage base 4 is vertically connected to the lower part of the upper mold 3. A clearance hole 42 is formed in the middle of the material storage base 4 along the vertical direction. The size of the clearance hole 42 is adapted to the size of the lower mold 2, allowing the lower mold 2 to pass through vertically. A material storage interlayer 41 is formed on the inner peripheral wall of the clearance hole 42, extending circumferentially along the clearance hole 42, for storing the prepreg composite blank. The material storage base 4 can move downwards with the upper mold 3 to approach the lower mold 2, allowing the lower mold 2 to pass upwards through the clearance hole 42.

[0044] As the storage base 4 moves downwards with the upper mold 3, the prepreg laminate blank inside the storage base 4 can gradually adhere to and cover the outer periphery of the lower mold 2 from the center to the outer periphery, thereby allowing the gas trapped in the prepreg laminate blank to be discharged to the surroundings. This structure, through the combined effect of the limiting action of the top wall of the storage interlayer 41 and the pushing action of the lower mold 2, achieves the gradual covering of the blank and the discharge of gas, reducing the residual air bubbles at the source and ensuring the structural integrity of the helmet shell.

[0045] Furthermore, to improve the convenience of billet loading, a loading box 5 extending into the storage interlayer 41 is horizontally slidably connected to the storage base 4, such as... Figure 2 and Figure 5 As shown, the feeding box 5 has an upward-facing material receiving cavity 51, which is used to store the prepreg laminate blank. The feeding box 5 has a through hole 52 in the middle for the lower mold 2 to pass through vertically. The through hole 52 is coaxially arranged and connected with the clearance hole 42.

[0046] The horizontal sliding fit between the feeding box 5 and the storage seat 4 enables external feeding of the blank, avoiding interference from the side wall of the storage seat 4 when the blank is placed directly into the storage interlayer 41. The coaxial connection between the clearance hole 52 and the avoidance hole 42 ensures that the movement path of the lower mold 2 is unobstructed, allowing the lower mold 2 to smoothly pass through the feeding box 5 and the storage seat 4, and stably achieve the pushing operation on the blank.

[0047] like Figure 5As shown, the feeding box 5 is in the feeding state. In the initial state, the feeding box 5 slides horizontally out of the storage interlayer 41 area along the storage seat 4. After the prepreg composite blank is placed in the receiving cavity 51 of the feeding box 5, the feeding box 5 is pushed to slide horizontally along the storage seat 4, so that the feeding box 5 extends into the storage interlayer 41. At this time, the clearance hole 52 of the feeding box 5 is coaxially aligned and connected with the clearance hole 42 of the storage seat 4, thus completing the feeding action.

[0048] Optionally, a clamping ring 6 for supporting the prepreg laminate blank is slidably connected within the material cavity 51, such as... Figure 3 As shown, the clamping ring 6 can move the prepreg laminate blank upwards to cooperate with the top wall of the storage interlayer 41 to clamp the edge of the prepreg laminate blank. The sliding fit structure between the clamping ring 6 and the receiving cavity 51 realizes the lifting and lowering action of the clamping ring 6, providing a power transmission basis for clamping the edge of the blank. The supporting effect of the clamping ring 6 on the blank ensures that the blank remains flat during the up and down movement, avoiding wrinkles in the blank. The structure of the clamping ring 6 moving the blank upwards to cooperate with the top wall of the storage interlayer 41 to clamp the edge of the blank can increase the friction between the blank and the top wall of the storage interlayer 41. This friction can increase the adhesion force between the blank and the outer peripheral surface of the lower mold 2 when the blank is pushed and covered by the lower mold 2, ensuring that the blank can fit tightly against the lower mold 2 and improve the covering effect.

[0049] Furthermore, the top surface of the clamping ring 6 is provided with several circumferentially distributed venting grooves 61. The venting grooves 61 extend radially along the clamping ring 6, and an abutment surface 62 is formed between two adjacent venting grooves 61. The abutment surface 62 is used to abut against the prepreg laminate blank. By reducing the contact area with the blank, the clamping force on the blank is enhanced.

[0050] like Figure 4 As shown, the circumferentially distributed venting grooves 61 and the mating structure of the contact surface 62 provide a dedicated channel for gas discharge while ensuring the stable support and clamping of the blank by the clamping ring 6. The radially extending venting grooves 61 allow gas between the blank and the clamping ring 6 to quickly discharge towards the outer periphery of the clamping ring 6, preventing gas from stagnating at the bottom of the blank and forming bubbles, further improving the thoroughness of gas discharge. The circumferentially uniform distribution of the venting grooves 61 allows gas to be discharged evenly in all directions of the clamping ring 6, preventing localized gas accumulation, improving the uniformity of stress on the blank, and thus ensuring the molding quality of the helmet shell.

[0051] Optionally, the outer end of the venting groove 61 has a connecting section 611 that extends downward through the bottom surface of the clamping ring 6. The connecting section 611 is disposed through the outer peripheral wall of the clamping ring 6, such as... Figure 4As shown, the connecting section 611 forms a complete exhaust channel between the exhaust groove 61 and the external space, preventing gas from stagnating or flowing back due to end closure within the exhaust groove 61. This ensures continuous and rapid gas discharge, further enhancing the thoroughness of gas discharge. The connecting section 611 penetrates the bottom surface and outer peripheral wall of the clamping ring 6, allowing gas to be discharged in two directions, increasing the diversity of exhaust paths and avoiding gas stagnation caused by blockage of a single exhaust path. This structure works synergistically with the exhaust groove 61 structure to improve the gas discharge system, preventing gas residue from multiple dimensions and significantly reducing the incidence of porosity and delamination defects after helmet shell molding. Simultaneously, the connecting section 611 does not affect the sliding fit between the clamping ring 6 and the material cavity 51, nor does it compromise the supporting effect of the contact surface 62 on the blank, achieving compatibility between the exhaust function and the original structural function.

[0052] To ensure the smoothness and accuracy of the lifting and lowering motion of the clamping ring 6, the inner wall of the material receiving cavity 51 is provided with several axially extending guide grooves 53, and the outer periphery of the clamping ring 6 has several guide protrusions 63. These guide protrusions 63 and guide grooves 53 are slidably engaged in a one-to-one correspondence. Figure 4 As shown, the one-to-one sliding fit structure between the guide protrusion 63 and the guide groove 53 provides a stable guiding effect for the lifting and lowering movement of the clamping ring 6, preventing circumferential rotation or radial offset of the clamping ring 6 during movement. This ensures that when the clamping ring 6 moves the billet upward, the edge of the billet can be accurately aligned with and clamped against the top wall of the storage interlayer 41, improving the accuracy of the clamping position. The axial extension of the guide groove 53 ensures the smoothness of the lifting and lowering movement of the clamping ring 6 and reduces jamming during sliding. The circumferentially evenly distributed arrangement of the guide groove 53 and the guide protrusion 63 makes the force on the clamping ring 6 more uniform, further improving its stability during movement.

[0053] Optionally, the storage base 4 is equipped with an electromagnetic adsorption component 43, and the clamping ring 6 is a magnetically adsorption component. The electromagnetic adsorption component 43 can adsorb the clamping ring 6 and slide it upward in the material receiving cavity 51 under the action of electricity, such as... Figure 2 and Figure 3 As shown, the electromagnetic adsorption component 43 can be a ring-shaped electromagnetic chuck, which is electrically connected to the control circuit and power module configured on the frame 1. The control circuit integrates a current adjustment module, which can accurately control the magnetic strength by adjusting the current parameters input to the electromagnetic chuck. The electromagnetic adsorption component 43 is installed on the material storage seat 4 to ensure accurate magnetic alignment with the clamping ring 6.

[0054] The combination of the electromagnetic adsorption component 43 and the magnetically clamping ring 6 provides an automated drive for the upward sliding of the clamping ring 6, replacing manual drive, improving the automation level and efficiency of the molding process, and reducing human error. The control circuit can also be linked with the position sensor of the loading box 5. When the loading box 5 slides to the preset position, the sensor will trigger the control circuit to automatically turn on the power to the electromagnetic adsorption component 43, realizing the automatic upward clamping of the clamping ring 6 without manual intervention.

[0055] The controllable magnetic force of the electromagnetic adsorption component 43 allows for precise control of the clamping action of the clamping ring 6. The magnetic force can be controlled by adjusting the current, thereby controlling the clamping force on the edge of the blank, preventing excessive clamping force from damaging the blank or insufficient clamping force from causing inadequate adhesion. The electromagnetic drive method features fast response and smooth operation, ensuring that the clamping ring 6 can quickly and smoothly move the blank upwards, further improving the stability of the molding process. After the electromagnetic adsorption component 43 is de-energized, the magnetic force disappears, and the clamping ring 6 slides downwards and resets along the material receiving cavity 51 under its own gravity, facilitating subsequent material removal operations.

[0056] Furthermore, the top of the storage base 4 is provided with several upwardly extending guide rods 44. The guide rods 44 pass through the upper mold 3 and slide in cooperation with the upper mold 3. The top end of the guide rods 44 is provided with a limiting part 441, which is used to abut against the top wall of the upper mold 3 to limit the downward movement of the storage base 4 relative to the upper mold 3. Figure 2 As shown, the sliding fit structure between the guide rod 44 and the upper mold 3 provides guidance for the lifting and lowering movement of the storage seat 4, preventing the storage seat 4 from shifting or tilting during the downward or upward movement of the upper mold 3, ensuring the accurate relative position of the storage seat 4 and the lower mold 2, and improving the precision of blank covering. The limiting part 441 limits the downward movement of the storage seat 4 relative to the upper mold 3, preventing the blank from being excessively squeezed and damaged due to excessive downward movement of the storage seat 4, and at the same time providing a limiting reference for the relative movement of the storage seat 4 and the upper mold 3.

[0057] This structure allows the material storage seat 4 to move relative to the upper mold 3 during the coating stage, ensuring that the upper mold 3 can continue to move downwards to achieve the mold closing action after the blank is coated, thus adapting to the mold closing and forming requirements. When the upper mold 3 rises, the structure that drives the material storage seat 4 to rise synchronously through the limiting part 441 achieves automatic reset of the material storage seat 4, eliminating the need for an additional reset drive structure and simplifying the equipment structure. The guide rods 44 are evenly distributed circumferentially, making the force on the material storage seat 4 more uniform and further improving the stability of its lifting and lowering movements.

[0058] Optionally, a pusher elastic element 45 is sleeved on the guide rod 44. The two ends of the pusher elastic element 45 abut against the upper mold 3 and the material storage seat 4, respectively, to provide a force that pulls the material storage seat 4 away from the upper mold 3. Figure 2As shown, the push-up elastic element 45 is preferably a spring, which is disposed between the upper mold 3 and the storage seat 4. It acts as a buffer when the storage seat 4 slides upward relative to the upper mold 3, reducing rigid collisions between the storage seat 4 and the upper mold 3, thus reducing equipment wear and extending equipment lifespan. The push-up elastic element 45 provides elastic pushing force to the storage seat 4, assisting the storage seat 4 in resetting and improving the reliability of the storage seat 4's resetting. The elastic force of the push-up elastic element 45 can be adjusted by selecting components with different elastic coefficients to adapt to the forming requirements of different specifications of blanks, enhancing the versatility of the equipment.

[0059] This solution also provides a molding process for a bomb disposal helmet shell. Using the aforementioned molding equipment, the process steps include material feeding, upper mold descent, and mold closing. In the material feeding step, the prepreg blank is placed in the storage base 4, specifically through the feeding box 5. The blank is placed in the receiving cavity 51 of the feeding box 5, and the feeding box 5 is pushed into the storage interlayer 41, so that the blank is in the storage interlayer 41 area of ​​the storage base 4. The blank is supported by the clamping ring 6, and the electromagnetic adsorption component 43 is activated to adsorb the clamping ring 6 and move it upward, cooperating with the top wall of the storage interlayer 41 to clamp the edge of the blank. The sliding cooperation between the guide protrusion 63 and the guide groove 53 ensures that the clamping ring 6 moves upward smoothly and avoids displacement.

[0060] During the upper mold descent step, the starting cylinder drives the upper mold 3 to descend, and the upper mold 3 drives the storage seat 4 to descend synchronously. The sliding fit between the guide rod 44 and the upper mold 3 ensures that the storage seat 4 moves smoothly downward. During the downward movement of the storage seat 4, the lower mold 2 gradually approaches and penetrates the clearance hole 42 of the storage seat 4 and the clearance hole 52 of the loading box 5. During this process, under the combined action of the limiting effect of the top wall of the storage interlayer 41 and the pushing effect of the lower mold 2, the prepreg composite billet gradually adheres to and covers the outer peripheral surface of the lower mold 2 from the center to the outer periphery, and the gas trapped inside the billet is discharged to the surroundings. The gas between the billet and the clamping ring 6 is quickly discharged to the outside through the exhaust groove 61 and the connecting section 611 to avoid stagnation.

[0061] In the molding process, after the blank completely covers the lower mold 2, the storage seat 4 cannot continue to move downward due to the reaction force of the lower mold 2. The upper mold 3 continues to move downward, and the storage seat 4 slides relative to the upper mold 3. The push elastic element 45 is compressed, which plays a buffering role. Until the upper mold 3 and the lower mold 2 are completely closed, the blank is subjected to a preset temperature and pressure by the existing hot pressing equipment, so that the blank is formed into a helmet shell. After molding is completed, the cylinder drives the upper mold 3 to rise. Initially, the storage seat 4 has a tendency to slide downward under the elastic restoring force of the push elastic element 45. When the limiting part 441 contacts the top wall of the upper mold 3, the upper mold 3 drives the storage seat 4 to rise and reset synchronously. The electromagnetic adsorption element 43 is de-energized, and the clamping ring 6 resets under its own gravity.

[0062] Once the equipment returns to its initial state, the completed helmet can be pulled out from above directly through the clearance hole 42. The remaining material at the edge of the helmet after molding will remain flexible because it is always in the storage interlayer 41, so it will not affect the helmet being pulled out upwards through the clearance hole 42.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A forming apparatus for an explosive ordnance disposal helmet shell, characterized by, Include: Frame (1), the lower die (2) is provided on the frame (1), and the upper die (3) is arranged above the lower die (2) and is lifted; The storage seat (4) is connected to the lower side of the upper die (3), the middle part of the storage seat (4) is provided with an avoiding hole (42) for the lower die (2) to pass through, the inner circumferential wall of the avoiding hole (42) is provided with a storage clamping layer (41), and the storage clamping layer (41) is used for storing the prepreg laminated blank; The storage seat (4) can move downwards to approach the lower die (2) along with the upper die (3), and the lower die (2) can pass through the avoiding hole (42) upwards; When the storage seat (4) moves downwards along with the upper die (3), the prepreg laminated blank in the storage seat (4) can be gradually fitted and wrapped on the outer circumferential surface of the lower die (2) from the center to the outer circumferential surface, so that the gas mixed in the prepreg laminated blank is discharged to the surrounding; The upper material box (5) extending into the storage clamping layer (41) is horizontally and slidably connected to the storage seat (4), the upper material box (5) is provided with a material containing cavity (51) with an opening upward, the material containing cavity (51) is used for storing the prepreg laminated blank; the middle part of the upper material box (5) is provided with a gap hole (52) for the lower die (2) to pass through, the gap hole (52) is coaxially arranged with the avoiding hole (42) and is communicated; The material containing cavity (51) is slidably connected with a clamping ring (6) for supporting the prepreg laminated blank, the clamping ring (6) can drive the prepreg laminated blank to move upwards, so as to cooperate with the top wall of the storage clamping layer (41) to clamp the edge of the prepreg laminated blank; The top surface of the clamping ring (6) is provided with a plurality of circumferentially distributed exhaust grooves (61), the exhaust grooves (61) extend along the radial direction of the clamping ring (6), and the abutting surfaces (62) are formed between adjacent two exhaust grooves (61), the abutting surfaces (62) are used for abutting with the prepreg laminated blank; The outer end of the exhaust groove (61) has a communication section (611) penetrating the bottom surface of the clamping ring (6) downward, and the communication section (611) penetrates the outer circumferential wall of the clamping ring (6); The upper side of the storage seat (4) is provided with an electromagnetic attraction part (43), the clamping ring (6) is a magnetically attractable component, and the electromagnetic attraction part (43) can attract the clamping ring (6) to slide upward in the material containing cavity (51) under the action of power supply.

2. A forming apparatus for an explosive ordnance headgear shell according to claim 1, wherein, The inner side wall of the material containing cavity (51) is provided with a plurality of axially extending guide grooves (53), the outer circumferential surface of the clamping ring (6) has a plurality of guide protrusions (63), and a plurality of guide protrusions (63) and a plurality of guide grooves (53) are slidably matched one by one.

3. The forming apparatus of a bomb disposal helmet shell according to claim 1, wherein The top of the material storage seat (4) is provided with a plurality of upward extending guide rods (44), the guide rods (44) penetrate through the upper die (3) and slide fit with the upper die (3), the top end of the guide rod (44) is provided with a limiting portion (441), the limiting portion (441) is used for abutting against the top wall of the upper die (3) to limit the descending amplitude of the material storage seat (4) relative to the upper die (3).

4. The forming apparatus for an EOD helmet shell according to claim 3, wherein A pushing elastic member (45) is sleeved on the guide rod (44), the two ends of the pushing elastic member (45) respectively abut against the upper die (3) and the material storage seat (4), for providing the force of the material storage seat (4) away from the upper die (3).

5. A forming process of an EOD helmet shell using the forming apparatus of any one of claims 1 to 4, characterized in that, Comprise: S1, material feeding: placing a prepreg laminated blank in the material storage seat (4); S2, upper die descending: the upper die (3) drives the material storage seat (4) to descend until the lower die (2) penetrates through the avoiding hole (42), in the above process, the prepreg laminated blank is gradually fitted and coated on the outer peripheral surface of the lower die (2) from the center to the periphery, so that the gas inside the prepreg laminated blank is discharged to the periphery; S3, mold closing: the upper die (3) continues to drive the material storage seat (4) to descend until the upper die (3) and the lower die (2) are completely closed to make the prepreg laminated blank form.

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