A molding die for easy removal of parts from explosion-proof helmet shells

Abstract

This invention relates to the field of helmet shell mold technology. It provides a molding mold for easy removal of explosion-proof helmet shell parts, comprising a concave mold body and a convex mold body. The concave mold body includes a connecting seat for connection to a molding device. The top of the connecting seat has a mounting groove for mounting concave mold blocks. Several concave mold blocks are inclined and elliptical within the mounting groove, allowing them to slide closer together and abut against each other. A support is located at the bottom of the mounting groove, connecting with the bottom of the concave mold blocks to form a concave mold cavity. The split concave mold blocks provided by this invention achieve demolding of the helmet shell from the concave mold body through the tilting and elliptical movement of the concave mold blocks, solving the technical problem of difficulty in demolding helmet shells after hot pressing in the prior art.

Description

Technical Field

[0001] This invention relates to the field of helmet shell mold technology, and more specifically, to a molding mold that facilitates the removal of parts from explosion-proof helmet shells. Background Technology

[0002] Riot helmets, also known as explosion-proof helmets, are head protection equipment designed to protect against explosive fragments, blunt force trauma, high-speed projectiles, and impacts from stones and steel balls. They are primarily used by military, police, special police, riot police, security personnel, and emergency response personnel in high-risk scenarios such as riots, counter-terrorism operations, bomb disposal, and law enforcement. The helmet shell is typically made of PE composite material through hot pressing. The hot pressing process uses a hot press with a heated mold, consisting of a punch and a die. The PE composite material is placed between the punch and die, and the helmet shell is formed by the heating and extrusion of the punch and die. However, in actual use, because the wearing opening of the helmet shell is smaller than the internal dimensions, the manufacturing process usually requires multiple steps. Furthermore, the demolding process relies on manual prying or tapping, which not only affects the production cycle but also easily leads to shell deformation or micro-cracks, reducing product consistency and safety performance.

[0003] In existing technologies, to facilitate demolding after thermoforming the helmet shell, the concave mold is usually designed as two separate parts that can be separated from each other. After thermoforming, the separation of the two concave mold parts allows the helmet shell to detach from the mold. However, in actual use, even after the two parts are separated, the helmet shell is still prone to sticking to one of the concave mold parts, and a multi-step processing procedure is required to form a shrinkable wearing opening. Summary of the Invention

[0004] To overcome the above-mentioned defects, embodiments of the present invention provide a molding die that facilitates the removal of parts from the explosion-proof helmet shell, solving the technical problem that the helmet shell is not easy to demold after hot pressing in the prior art.

[0005] A molding die for facilitating the removal of parts from an explosion-proof helmet shell includes a concave die body and a convex die body, wherein the concave die body includes: A connecting seat is used to connect with a molding device. The top of the connecting seat has a mounting groove for mounting the die blocks. There are several die blocks, and the several die blocks are tilted and lifted in the mounting groove. The die blocks can slide and approach each other and abut against each other. A support is disposed at the bottom of the mounting groove, and the support can connect with the bottom of the plurality of concave mold blocks to form a concave mold cavity; After the helmet shell is formed, the punch mold body moves away from the die mold body under the action of the forming device, and the helmet shell remains in the die cavity. The plurality of die blocks can move away from each other so that the die blocks are separated from the helmet shell.

[0006] As a further technical solution, the number of the die-cutting blocks is four, with each pair of adjacent die-cutting blocks forming a group. Each group of die-cutting blocks is connected by a connecting block. One end of the connecting block is rotatably connected to one die-cutting block, and the other end is slidably connected to another die-cutting block. The connecting block can slide with one die-cutting block and drive the other die-cutting block to slide.

[0007] As a further technical solution, the punch body includes: A base assembly for connection to a molding device, the base assembly being located above the connecting seat; The assembly includes several punch blocks, all of which are raised and slidably mounted on the base assembly. Each punch block has an outwardly protruding functional section at its bottom. When the bottoms of the punch blocks are combined, they can form a forming part that mates with the cavity. The punch blocks are divided into two groups, with the first group of punch blocks located between the second group of punch blocks. The sides of the second group of punch blocks that are close to each other are inclined surfaces. As the height decreases, the distance between the second group of punch blocks gradually decreases, so that when the first group of punch blocks descends, it can push the second group of punch blocks to slide away from each other.

[0008] When the base assembly descends and approaches the concave mold body, the working section of the second group of punch blocks first enters the concave mold cavity, and then the working section of the first group of punch blocks enters the concave mold cavity and pushes the second group of punch blocks to slide away from each other.

[0009] As a further technical solution, the punch body also includes: A top bar is raised and lowered on the base assembly, and the top bar is located between the first group of punch blocks. The cross-sectional area of ​​the top bar gradually decreases as the height decreases, so that when the top bar moves downward, it can support the first group of punch blocks to move away from each other.

[0010] As a further technical solution, the bottom of the top strip has an arc surface, and the bottom of the top strip can work together with the working sections of the plurality of punch blocks to extrude the helmet shell material in the concave mold cavity.

[0011] As a further technical solution, the base assembly includes: A connecting plate is used to connect with the forming device, and the top of the top bar is disposed on the connecting plate; A support frame is provided on the connecting plate, and several of the punch blocks are raised, lowered, and slidably disposed on the support frame and pass through the support frame.

[0012] As a further technical solution, the punch body also includes: There are several lifting blocks, all of which are lifted and lowered on the support frame. The lifting blocks are located one-to-one on the side of the punch blocks that are far apart from each other, and can follow the punch blocks to rise and fall. The first elastic element has its two ends connected to the lifting block and the punch assembly block respectively. The first elastic element is used to provide a force for the plurality of punch assemblies to slide closer to each other.

[0013] As a further technical solution, a lifting slider extending outward is provided on the side of the plurality of punch blocks that are far apart from each other. The lifting slider is raised and lowered and slidably disposed on the support frame. The lifting slider can be supported by the connecting plate. When the punch block abuts against the helmet shell material in the concave mold cavity, the lifting slider gradually approaches the punch block so that the lifting slider can press down on the punch block.

[0014] As a further technical solution, the punch body also includes: The base plate is lifted and installed on the top of the support frame. After the base plate moves downward with the support frame, it can abut against the top surface of the concave mold body, and the convex mold block passes through the base plate. The second elastic element has its two ends connected to the bottom of the base plate and the bottom of the support frame, respectively, and the base plate is suspended from the bottom of the support frame by the second elastic element.

[0015] As a further technical solution, it also includes: A first limiting post is provided at the bottom of the support frame. When the support frame descends and approaches the cavity mold body, the first limiting post can enter the first limiting hole of the connecting seat. The second limiting post is provided on the connecting seat. When the support frame descends and approaches the die body, the second limiting post can enter the second limiting hole of the support frame.

[0016] The beneficial effects of this invention are as follows: In this invention, the connecting seat connects to the molding device, providing stable support for the die body. The die blocks achieve tilting and lifting through the cooperation of a slider and an inclined groove, forming a precise die structure during molding. After molding, they can slide upwards along the inclined groove to move away from each other, facilitating demolding. The support and the die blocks cooperate to form the die cavity, ensuring the integrity of the helmet shell molding space. After the helmet shell is completely detached from the die blocks, the support can support the top of the helmet shell. Furthermore, because the support is shaped to match the top of the helmet shell, it prevents the helmet shell from falling and being damaged, and also prevents the helmet shell from rolling and colliding with other structural components, thus avoiding damage.

[0017] The tilting and lifting concave mold block can not only move away from the helmet shell in all directions at the same time, but also move upward using the adhesive force between the helmet shell and the concave mold block, thereby detaching the top of the helmet shell from the support. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the overall structure of the concave mold body of the present invention; Figure 2 This is a schematic diagram of the overall structure of the punch body of the present invention; Figure 3 for Figure 1 The above-view structural diagram of the embodiment is shown. Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the middle AA direction; Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure in the middle BB direction; Figure 6 This is a schematic diagram of the overall structure when the punch body is above the die body; Figure 7 for Figure 6 Enlarged structural diagram at point C; Figure 8 for Figure 6 The diagram shows a front view of the embodiment. Figure 9 for Figure 8 Enlarged structural diagram at point D; Figure 10 for Figure 6 The schematic diagram of the working section of the punch block in the embodiment shown; Figure 11 This is a schematic diagram of the overall structure of the punch body when it is in a hot-pressed state. Figure 12 for Figure 11 The diagram shows a front view of the embodiment. Figure 13 A schematic diagram of the overall structure of the punch mold body with a base plate and a second elastic element; In the diagram: 100, die body; 200, punch body; 110, connecting seat; 120, die assembly; 130, mounting groove; 140, support; 150, die cavity; 160, connecting block; 210, base assembly; 220, punch assembly; 221, action section; 230, forming part; 240, top strip; 250, connecting plate; 260, support frame; 270, lifting block; 280, first elastic element; 222, lifting slider; 290, base plate; 291, second elastic element; 300, first limiting post; 400, second limiting post. Detailed Implementation 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.

[0020] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; 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."

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] like Figures 1-12 The diagram illustrates a molding die for facilitating the removal of explosion-proof helmet shell components according to an embodiment of the present invention. It includes a concave mold body 100 and a convex mold body 200. The concave mold body 100 includes a connecting seat 110, concave mold blocks 120, and a support 140. The connecting seat 110 is connected to a molding device by bolts and has a mounting groove 130 on its top. Several concave mold blocks 120 are included, each with a slider on its side. The mounting groove 130 has corresponding inclined sliding grooves on its walls. The sliders and grooves can be T-shaped or dovetail-shaped. The concave mold blocks 120 are tilted and raised within the mounting groove 130 via the cooperation of the sliders and inclined sliding grooves, and can slide closer together and abut against the support 140. The support 140 is fixed to the bottom of the mounting groove 130, and its surface is in contact with the bottom of the concave mold blocks 120 to form a concave mold cavity 150. The punch mold body 200 and the die mold body 100 work together. After the helmet shell is formed, the punch mold body 200 moves away from the die mold body 100 under the drive of the hydraulic cylinder of the forming device, and the helmet shell remains in the die cavity 150. At this time, the electric push rod installed on the die block 120 drives the die block 120 to rise and slide along the slide groove in the mounting groove 130 to move away from each other and separate from the helmet shell.

[0026] The connecting seat 110 is securely connected to the molding device by bolts, providing a reliable mounting base for the die body 100. The die block 120, with the aid of a slider and an inclined slide, achieves tilting and lifting movement according to the direction of the inclined slide. During operation, the electric push rod retracts, causing the die blocks 120 to move closer together to form a complete die. The support 140 and the die blocks 120 together form the die cavity 150, used to hold the helmet shell material. The punch body 200 descends under the drive of the hydraulic cylinder to cooperate with the die body 100 for hot pressing and forming of the material. After forming, the hydraulic cylinder drives the punch body 200 to rise and move away, and the electric push rod extends to drive the die blocks 120 to move away from each other, thereby detaching the helmet shell from the die for easy removal.

[0027] The connecting seat 110 connects to the molding device, providing stable support for the die body 100. The die block 120 achieves tilting and lifting through the cooperation of the slider and the inclined slide, forming a precise die structure during molding. After molding, it can slide upward along the inclined slide to move away from each other, facilitating demolding. The support 140 cooperates with the die block 120 to form the die cavity 150, which not only ensures the integrity of the helmet shell molding space, but also supports the top of the helmet shell after it is completely detached from the die block 120. Because the support 140 is adapted to the shape of the top of the helmet shell, it prevents the helmet shell from falling and being damaged, and also prevents the helmet shell from rolling and colliding with other structural components.

[0028] The tilting and lifting concave mold block 120 can not only move away from the helmet shell in all directions at the same time, but also move upward using the adhesive force between the helmet shell and the concave mold block 120, thereby causing the top of the helmet shell to detach from the support 140.

[0029] Furthermore, there are four die-cutting blocks 120. Each pair of adjacent die-cutting blocks 120 forms a group, and each group of die-cutting blocks 120 is connected by a connecting block 160. One end of the connecting block 160 is rotatably connected to one die-cutting block 120 via a pin, and the other end is slidably connected to a rectangular groove on another die-cutting block 120 via a cylindrical slider. When one die-cutting block 120 moves, the connecting block 160 can drive the other die-cutting block 120 to move synchronously. This arrangement makes the movement between the die-cutting blocks 120 more coordinated and stable, further improving the stability and reliability of the demolding process, and ensuring that the helmet shell is not damaged during demolding due to inconsistent movement of the die-cutting blocks 120.

[0030] like Figure 6 and Figure 8 As shown, the punch body 200 includes a base assembly 210 and punch blocks 220. The base assembly 210 includes a connecting plate 250 and a support frame 260. The connecting plate 250 is connected to the pressing mechanism of the forming device by bolts, and the support frame 260 is welded to the bottom of the connecting plate 250. There are several punch blocks 220, which cooperate with the vertical guide groove and the horizontal slide groove on the support frame 260 through lifting sliders 222. The lifting sliders 222 are welded to the ends of the punch blocks 220 that are far apart from each other, and are lifted and lowered in cooperation with the vertical guide grooves on the support frame 260. The vertical guide grooves can slide along the horizontal slide grooves to achieve lifting and sliding on the support frame 260. The bottom of the punch blocks 220 has an outwardly protruding functional section 221. The functional sections 221 at the bottom of several punch blocks 220 are combined to form a forming part 230 that cooperates with the cavity 150.

[0031] The punch blocks 220 are divided into two groups. The first group of punch blocks 220 is located between the second group of punch blocks 220. The sides of the second group of punch blocks 220 that are close to each other are inclined. As the height decreases, the distance between the second group of punch blocks 220 gradually decreases. When the base assembly 210 is at its highest point, there is a height difference between the action sections 221 of the first group of punch blocks 220 and the action sections 221 of the second group of punch blocks 220. When the base assembly 210 descends and approaches the die body 100, the action sections 221 of the second group of punch blocks 220 first enter the die cavity 150, and then the action sections 221 of the first group of punch blocks 220 enter the die cavity 150 and push the second group of punch blocks 220 to slide away from each other. This method allows for uniform molding of all parts of the helmet shell during the hot pressing process, improving the product molding accuracy. Furthermore, after working together with the concave mold block 120 to form a helmet shell with a wearing opening size smaller than the internal size of the main body, the convex mold block 220 can be segmented to shrink through the wearing opening, allowing the convex mold block 220 to be demolded from the helmet shell.

[0032] Furthermore, the punch body 200 also includes an ejector bar 240. The top of the ejector bar 240 is fixed to the connecting plate 250 by bolts. The ejector bar 240 is wedge-shaped, and its cross-sectional area gradually decreases as the height decreases. The ejector bar 240 is located between the first set of punch blocks 220. When the ejector bar 240 moves downward under the action of the pressing mechanism of the forming device, the ejector bar 240 moves downward relative to the first set of punch blocks 220, so that the ejector bar 240 can support the first set of punch blocks 220 and move them away from each other. Conversely, when the top bar 240 moves upward relative to the first set of punch blocks 220, the first set of punch blocks 220 approach each other. When the first set of punch blocks 220 approach each other to a certain distance, the first set of punch blocks 220 can rise under the action of the support frame 260 and leave from the wearing opening of the helmet shell. During the rising process of the first set of punch blocks 220, the second set of punch blocks 220 approach each other. When the second set of punch blocks 220 approach each other to a certain distance, the second set of punch blocks 220 can rise under the action of the support frame 260 and leave from the wearing opening of the helmet shell.

[0033] Furthermore, to enable the segmented movement of the first set of punch blocks 220 and the second set of punch blocks 220, a vertical sliding groove adapted to the lifting block 270 is provided on the support frame 260. The lifting block 270 cooperates with the vertical sliding groove through a slider, allowing the lifting block 270 to slide vertically along the support frame 260. Several lifting blocks 270 are located one-to-one on the side of several punch blocks 220 that are far apart from each other, and are connected to the punch blocks 220 through telescopic rods. When the punch blocks 220 are far apart from each other, they can approach the lifting block 270. When the punch blocks 220 slide vertically relative to the support frame 260, the lifting block 270 can follow the punch blocks 220 to rise and fall vertically.

[0034] A first elastic element 280, which is a spring, is provided between the lifting block 270 and the punch assembly 220. The spring's two ends are respectively attached to the lifting block 270 and the punch assembly 220. When the punch assemblies 220 are subjected to internal compressive force and move away from each other, the first elastic element 280 is compressed. When the internal compressive force of the punch assemblies 220 disappears, the first elastic element 280 extends and retracts, allowing the punch assemblies 220 to move closer together. For example, when the first set of punch assemblies 220 descends relative to the second set of punch assemblies 220, the first set of punch assemblies 220 pushes the second set of punch assemblies 220 away from each other. At this time, the first elastic element 280 connected to the second set of punch assemblies 220 is compressed. When the first set of punch assemblies rises relative to the second set of punch assemblies 220, the second set of punch assemblies 220 can slide closer together under the action of the first elastic element 280.

[0035] A plurality of punch blocks 220 are provided with outwardly extending lifting sliders 222 on their respective sides. A vertical groove adapted to the lifting slider 222 is correspondingly provided on the support frame 260. The vertical groove can move horizontally on the support frame 260 to approach or move away from the lifting block 270. The lifting slider 222 can rise and slide relative to the support frame 260 through the vertical groove. The top surface of the support frame 260 abuts against the lifting slider 222, which can lift the punch blocks 220. Specifically, when the support frame 260 descends, the punch blocks 220 descend with the support frame 260 under the action of gravity. Since there is a height difference between the bottoms of the first group of punch blocks 220 and the second group of punch blocks 220, the bottom of the second group of punch blocks 220 first abuts against the helmet shell material inside the cavity 150. The helmet shell material can provide support for the second group of punch blocks 220. At this time, the support frame 260 continues to descend, and relative movement occurs between the second set of punch blocks 220 and the support frame 260. The lifting slider 222 disengages from the top of the support frame 260, and the connecting plate 250 assembly approaches the top of the second set of punch blocks 220.

[0036] As the support frame 260 continues to descend, the top bar 240 begins to slide relative to the first set of punch blocks 220. The top bar 240 needs to overcome the elastic force of the first elastic element 280 to push the first set of punch blocks 220 away from each other. When the resistance that the top bar 240 needs to overcome is greater than the resistance that the first set of punch blocks 220 pushes the second set of punch blocks 220 away from each other, the first set of punch blocks 220 moves downward with the top bar 240 and moves downward relative to the second set of punch blocks 220, and the second set of punch blocks 220 slides away from each other. Until the resistance of the first set of punch blocks 220 pushing the second set of punch blocks 220 away from each other is greater than or equal to the resistance of the ejector bar 240 pushing the first set of punch blocks 220 away from each other, the ejector bar 240 descends relative to the first set of punch blocks 220, causing the first set of punch blocks 220 to move away from each other. At this time, the first set of punch blocks 220 needs to overcome the elastic force of the corresponding first elastic element 280. As the distance between the first set of punch blocks 220 and each other increases, the deformation of the first elastic element 280 also gradually increases, and the resistance also gradually increases. The resistance change of the second set of punch blocks 220 is similar. This continues until the bottom of the ejector bar 240, the action section 221 of the first set of punch blocks 220, and the action section 221 of the second set of punch blocks 220 all enter the cavity 150 and form the forming part 230. At this time, the bottom of the connecting plate 250 abuts against the top of the first set of punch blocks 220 and the second set of punch blocks 220, so that the connecting plate 250 can apply the force of the pressing strip 240 and the punch blocks 220 and realize the forming of the helmet shell.

[0037] When demolding, the connecting plate 250 drives the support frame 260 and the top bar 240 to rise. The first set of punch blocks 220 slides closer to each other under the action of the first elastic element 280. When the support frame 260 is lifted back to the lifting slider 222, the first set of punch blocks 220 can follow the support frame 260 to rise and leave the concave mold cavity 150 through the lifting slider 222. Similarly, the second set of punch blocks 220 leaves the concave mold cavity 150 in the same way, thus completing the demolding. During descent, the top bar 240 moves relative to both the first and second set of punches 220. Therefore, the corresponding lifting sliders 222 of both sets of punches 220 and 220 have a certain height difference from the support frame 260. At this time, through the initial rise of the top bar 240 and the action of the first elastic element 280, the first and second sets of punches 220 can first approach each other within the concave mold cavity 150, and then move away from the concave mold cavity 150, avoiding interference with the helmet-shaped shell. Because of the height difference between the lifting sliders 222 of the first and second sets of punches 220, the first and second sets of punches 220 can sequentially leave the concave mold cavity 150.

[0038] When the punch block 220 descends and comes into contact with the helmet shell material inside the concave mold cavity 150, as the punch block 220 continues to descend, the lifting slider 222 gradually approaches the lifting block 270.

[0039] The lifting slider 222 can not only realize the relative movement of the first set of punch blocks 220 and the second set of punch blocks 220, but also control the height difference between the first set of punch blocks 220 and the second set of punch blocks 220 by changing the position of the lifting slider 222.

[0040] Furthermore, to provide a better forming effect for the helmet shell, the bottom of the top strip 240 is machined into an arc-shaped surface. During the hot pressing process, the arc-shaped surface at the bottom of the top strip 240, together with the action sections 221 of several punch blocks 220, acts on the helmet shell material within the concave mold cavity 150. When the punch blocks 220 and the top strip 240 descend to extrude the material, the arc-shaped surface and the action sections 221 fit tightly together, jointly extruding the material.

[0041] Furthermore, the connecting plate 250 is connected to the forming device by bolts, and the top of the top strip 240 is fixed to the connecting plate 250 by bolts. The support frame 260 is fixed to the bottom of the connecting plate 250 by welding. The support frame 260 is provided with a through hole for the punch assembly 220 to pass through. The punch assembly 220 is raised and lowered and slidably set on the support frame 260 through the cooperation of the lifting slider 222 and the guide structure, and passes through the support frame 260.

[0042] refer to Figure 13 As shown, in some embodiments, the punch mold body 200 further includes a base plate 290, which is suspended from the bottom of the support frame 260 by a second elastic element 291. The second elastic element 291 is a spring, and its two ends are hooked or welded to the top of the support frame 260 and the top of the base plate 290, respectively. When the support frame 260 moves downward under the action of the pressing mechanism of the forming device, the base plate 290 moves downward along with the support frame 260. After the base plate 290 abuts against the top surface of the die mold body 100, the support frame 260 continues to descend, and the second elastic element 291 is compressed. At this time, the punch assembly 220 continues to descend to compress the helmet shell material. When the forming is completed and the support frame 260 rises, the elastic force of the second elastic element 291 causes the base plate 290 to return to its original position.

[0043] The base plate 290 is connected to the support frame 260 via the second elastic element 291, providing a buffer for the punch body 200. When the base plate 290 abuts against the top surface of the die body 100, the compression of the second elastic element 291 can buffer the impact force of the punch body 200 descending, protecting the mold structure from damage.

[0044] Furthermore, a first limiting post 300 is welded to the bottom of the support frame 260, and a corresponding first limiting hole is opened on the connecting seat 110. A second limiting post 400 is welded to the connecting seat 110, and a corresponding second limiting hole is opened on the support frame 260. When the support frame 260 descends and approaches the die body 100 under the action of the pressing mechanism of the forming device, the first limiting post 300 can enter the first limiting hole of the connecting seat 110, and the second limiting post 400 can enter the second limiting hole of the support frame 260.

[0045] Beneficial effects: The first limiting post 300 and the second limiting post 400 provide a positioning function for the engagement of the punch body 200 and the die body 100. Through the cooperation of the limiting posts and limiting holes, it is ensured that the punch body 200 can accurately align with the die body 100 during descent, guaranteeing the accuracy of the mold during hot pressing and preventing poor helmet shell forming due to positional deviations. Simultaneously, this limiting structure also enhances the overall stability of the mold, preventing relative displacement between the punch body 200 and the die body 100 during high-pressure extrusion, which helps improve product consistency and quality.

[0046] 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 molding die for facilitating the removal of parts from an explosion-proof helmet shell, comprising a concave die body (100) and a convex die body (200), characterized in that, The die body (100) includes: A connecting seat (110) is used to connect to a molding device, and the connecting seat (110) has a mounting groove (130) on its top. The cavity mold assembly (120) has a plurality of them, and the plurality of cavity mold assembly (120) are slidably disposed in the mounting groove (130). The cavity mold assembly (120) can slide down to the center of the mounting groove (130) simultaneously to approach each other and make the side walls of adjacent cavity mold assembly (120) abut against each other. A support (140) is disposed at the bottom of the mounting groove (130). The support (140) can connect with the bottom of all the die blocks (120) after the die blocks (120) slide down and form a die cavity (150). The punch mold body (200) can move upward after the helmet shell is formed, so that the helmet shell is inside the concave mold cavity (150), and a plurality of concave mold blocks (120) can slide outward and upward simultaneously to move away from each other so that the concave mold blocks (120) are separated from the helmet shell; The punch body (200) includes: A base assembly (210) is used to connect to the molding device. The base assembly (210) is located above the connecting seat (110) and can slide up and down relative to the connecting seat (110). A plurality of punch blocks (220) are provided, all of which are raised and slidably disposed on the base assembly (210). The bottom of each punch block (220) has an outwardly protruding functional section (221). After the bottoms of the plurality of punch blocks (220) are combined, they can form a forming part (230) that cooperates with the concave mold cavity (150). The plurality of punch blocks (220) are divided into two groups: a first group and a second group. The punch blocks (220) in the first group and the punch blocks (220) in the second group are alternately arranged along the circumference. The inner side surface of the punch blocks (220) in the second group is inclined from top to bottom toward the center of the base assembly (210). When the base assembly (210) descends and approaches the cavity mold body (100), the action section (221) of the second set of punch blocks (220) first enters the cavity mold cavity (150) until it abuts against the bottom wall of the cavity mold cavity (150), and then the action section (221) of the first set of punch blocks (220) enters the cavity mold cavity (150) again and pushes the second set of punch blocks (220) to slide away from the center of the base assembly (210); A top bar (240) is raised and lowered on the base assembly (210), and the top bar (240) is located between the first group of punch blocks (220). The cross-sectional area of ​​the top bar (240) gradually decreases as the height decreases, so that when the top bar (240) moves downward, it can support the first group of punch blocks (220) to move away from each other. The base assembly (210) includes: A connecting plate (250) is used to connect with the forming device, and the top of the top strip (240) is disposed on the connecting plate (250); A support frame (260) is mounted on the connecting plate (250), and a plurality of the punch blocks (220) are raised and slidably mounted on the support frame (260) and pass through the support frame (260); The punch body (200) further includes: There are several lifting blocks (270), all of which are lifted and lowered on the support frame (260). The several lifting blocks (270) are located one-to-one on the side away from each other of the several punch blocks (220), and can follow the punch blocks (220) to rise and fall. The first elastic element (280) is connected at both ends to the lifting block (270) and the punch assembly (220), respectively. The first elastic element (280) is used to provide a force for the plurality of punch assemblies (220) to slide closer to each other. A lifting slider (222) extending outward is provided on the side of several punch blocks (220) that are far apart from each other. The lifting slider (222) can be lifted by the support frame (260). When the punch block (220) comes into contact with the helmet shell material in the concave mold cavity (150), the lifting slider (222) gradually moves closer to the lifting block (270).

2. The molding die for facilitating the removal of parts from an explosion-proof helmet shell according to claim 1, characterized in that, The number of the cavity mold blocks (120) is four. A connecting block (160) is connected between every two adjacent cavity mold blocks (120). One end of the connecting block (160) is rotatably connected to one of the cavity mold blocks (120), and the other end is slidably connected to another cavity mold block (120). The connecting block (160) can slide with one cavity mold block (120) and drive the other cavity mold block (120) to slide.

3. The molding die for facilitating the removal of parts from an explosion-proof helmet shell according to claim 1, characterized in that, The bottom of the top strip (240) has an arc-shaped surface, and the bottom of the top strip (240) can work together with the action section (221) of the plurality of punch blocks (220) to extrude the helmet shell material in the concave mold cavity (150).

4. The molding die for facilitating the removal of parts from an explosion-proof helmet shell according to claim 1, characterized in that, The punch body (200) further includes: The base plate (290) is raised and lowered on the top of the support frame (260). After the base plate (290) moves downward with the support frame (260), the base plate (290) can abut against the top surface of the concave mold body (100). The punch block (220) passes through the base plate (290). The second elastic element (291) is connected at both ends to the bottom of the base plate (290) and the support frame (260), respectively. The base plate (290) is suspended and raised and lowered at the bottom of the support frame (260) by the second elastic element (291).

5. A molding die for facilitating the removal of parts from an explosion-proof helmet shell according to claim 1, characterized in that, Also includes: The first limiting post (300) is disposed at the bottom of the support frame (260). When the support frame (260) descends and approaches the die body (100), the first limiting post (300) can enter the first limiting hole of the connecting seat (110). The second limiting post (400) is provided on the connecting seat (110). When the support frame (260) descends and approaches the die body (100), the second limiting post (400) can enter the second limiting hole of the support frame (260).

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