Anisomorphic cover forming mold

Abstract

This invention discloses a mold for forming irregularly shaped caps, relating to the field of non-metallic forming technology. It includes: a punch with multiple guide pillars circumferentially arranged on its outer surface, each guide pillar having an annular groove in its center; and a die positioned above the punch, with multiple guide sleeves circumferentially arranged on its outer surface to cooperate with the guide pillars and guide the punch and die into closing position. Each guide sleeve is rotatably connected to a closing handle, which rotates away from or towards the guide pillars. The end of the closing handle facing the guide pillars has an opening; the shape of the opening matches the annular groove to lock the relative position of the die and punch when the closing handle rotates to engage with the guide sleeve. The outer surface of the die also has multiple lifting rings circumferentially arranged for a lifting device to pass through and lift the die, and a sprue is provided at the top of the die. This application achieves stable mold closing without a press through the cooperation of the guide pillars, guide sleeves, and closing handle, reducing equipment costs and safety risks.

Description

Technical Field

[0001] This invention relates to the field of non-metallic molding technology, specifically to a mold for forming irregularly shaped caps. Background Technology

[0002] Currently, the typical process for foam molding of large non-metallic irregular caps involves first separating the concave and convex molds, then uniformly coating the inner surfaces of the concave and convex mold cavities with a release agent, injecting the foaming agent into the mold cavity through the sprue, and using a press to press the concave and convex molds together. The foaming agent completes the foaming reaction within the cavity, and the product structure gradually solidifies. After the product has cured, the press is opened to separate the concave and convex molds, remove the molded product, and finally clean the residue inside the mold cavity to prepare for the next pouring and foaming operation.

[0003] In actual operation, when applying release agent to the mold cavity on a press, the operator's movement space is very limited due to the press's structural constraints, leading to difficult operation and low efficiency. Furthermore, mold opening and closing operations must be completed within the press's limited space, increasing the complexity and time cost. Moreover, for non-metallic irregularly shaped caps with complex shapes and significant weight, the mold volume and weight are correspondingly large, significantly increasing the difficulty of performing mold opening, closing, demolding, and cleaning operations on the press. Summary of the Invention

[0004] This application provides a mold for forming irregular-shaped caps, which can solve the technical problems of limited operating space, difficulty in demolding and cleaning, and high safety risks in existing molds for forming large non-metallic irregular-shaped caps.

[0005] This application provides an irregularly shaped cap forming mold, the irregularly shaped cap forming mold comprising:

[0006] A punch, wherein a plurality of guide posts are circumferentially arranged on the outer surface of the punch, and an annular groove is formed in the middle of each guide post; and

[0007] A die is located above the punch. The outer surface of the die is circumferentially provided with a plurality of guide sleeves that cooperate with the guide post to guide the punch and the die to close. Each guide sleeve is rotatably connected to a mold closing handle. The mold closing handle rotates in a direction away from or towards the guide post. The end of the mold closing handle facing the guide post is provided with an opening.

[0008] The shape of the opening matches the annular groove so that when the mold clamping handle is rotated to fit the guide sleeve, it locks the relative position of the cavity mold and the punch mold. The outer surface of the cavity mold is also provided with a plurality of lifting rings for lifting tools to pass through and lift the cavity mold. The top of the cavity mold is provided with a sprue.

[0009] In one embodiment, the end of the guide sleeve away from the guide post has a threaded hole, and a mold-opening bolt is installed at the threaded hole. The mold-opening bolt passes through the threaded hole and abuts against the guide post sleeved inside the guide sleeve.

[0010] In one embodiment, the inner periphery of the die is provided with a chamfer, and the outer top of the punch is provided with a conical surface or inclined surface that matches the chamfer.

[0011] In one embodiment, the irregularly shaped cap forming mold further includes:

[0012] A pouring plug is fixed to the sprue. A baffle is provided at one end of the pouring plug away from the sprue. The orthographic projection of the baffle on the die covers the sprue. The cross-section of the baffle is rectangular.

[0013] In one embodiment, limit blocks are provided at both ends of the baffle, the vertical height of the limit blocks is greater than the vertical height of the baffle, and the lower surface of the limit blocks is pressed against the upper surface of the baffle. The limit blocks are provided with through holes, and screws pass through the through holes to fix the limit blocks to the die.

[0014] In one embodiment, the outer surface of the pouring plug is provided with at least four axially extending straight grooves, and the lower surface of the baffle is provided with a recess. The straight grooves, the recess, and the pouring port together form an exhaust overflow channel.

[0015] In one embodiment, the punch has an ejector pin inside, and the ejector pin is at least partially exposed on the upper surface of the punch, and the ejector pin is movable axially.

[0016] In one embodiment, a screw is provided inside the punch, with one end of the screw protruding from the outer wall of the punch, the axial direction of the screw being perpendicular to the axial direction of the ejector pin, and the other end of the screw abutting against the bottom outer wall of the ejector pin, so that the ejector pin moves axially as the screw rotates toward the inside of the punch.

[0017] In one embodiment, the end of the screw that abuts against the top post has a smooth, rounded end.

[0018] In one embodiment, the end of the screw that abuts against the top post is provided with a guide slope for engaging with the bottom of the top post.

[0019] The beneficial effects of the technical solutions provided in this application include:

[0020] This embodiment employs guide pillars and guide sleeves for guidance, and the mold uses guide pillars and guide sleeves for guiding and positioning. The mold position is locked by a mold closing handle, eliminating the need for a press to complete mold closing and foaming, significantly reducing safety risks. The lifting ring on the cavity mold facilitates lifting operations, making the mold opening process more convenient and safer, reducing labor intensity. The sprue is located at the highest point of the cavity mold, which helps the material fill the cavity during pouring, improving product molding quality. Furthermore, this embodiment allows auxiliary operations such as mold release agent application and mold cleaning to be performed while the mold is open, providing ample operating space and improving work efficiency. The locking mechanism after mold closing effectively resists the expansion force generated during the foaming process, ensuring mold closing stability and preventing product defects caused by mold displacement. The mold structure provided in this embodiment is reasonable, simplifying the operation process and providing a foundation for multi-station assembly line production, which is beneficial for improving production efficiency and suitable for mass production scenarios. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the irregular-shaped cap forming mold provided in the embodiments of this application;

[0023] Figure 2 This is a partial structural schematic diagram of the irregular-shaped cap forming mold provided in an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the structure of the die provided in the embodiments of this application;

[0025] Figure 4 This is a schematic diagram of the structure of the punch provided in an embodiment of this application;

[0026] Figure 5 This is a partial cross-sectional schematic diagram of the irregular-shaped cap forming mold provided in an embodiment of this application;

[0027] Figure 6 This is a cross-sectional schematic diagram of the punch provided in an embodiment of this application;

[0028] Figure 7 This is a schematic diagram of the structure of the casting plug provided in an embodiment of this application;

[0029] Figure 8 This is another structural schematic diagram of the casting plug provided in an embodiment of this application.

[0030] In the diagram: 1. Punch; 2. Die; 3. Guide post; 4. Pour plug; 5. Mold closing handle; 6. Sprue; 7. Mold opening bolt; 8. Guide sleeve; 9. Lifting ring; 10. Chamfer; 11. Annular groove; 12. Screw; 13. Ejector post; 14. Opening; 15. Baffle; 16. Limiting block; 17. Recess; 18. Straight groove. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0032] This application provides a mold for forming irregular-shaped caps, which can solve the technical problems of limited operating space, difficulty in demolding and cleaning, and high safety risks in existing molds for forming large non-metallic irregular-shaped caps.

[0033] Figure 1 This is a schematic diagram of the irregular-shaped cap forming mold provided in an embodiment of this application. Figure 2 This is a partial structural schematic diagram of the irregular-shaped cap forming mold provided in an embodiment of this application. See also: Figure 1 and Figure 2 This application provides an irregularly shaped cap forming mold, which includes:

[0034] The punch 1 has multiple guide posts 3 arranged circumferentially on its outer surface, and an annular groove 11 is formed in the middle of the guide posts 3.

[0035] Figure 4 A schematic diagram of the punch provided in an embodiment of this application. See also... Figure 4 Specifically, the guide post 3 is cylindrical in shape and can be divided into an upper half and a lower half. The diameter of the upper half of the guide post 3 is smaller than that of the lower half, which allows the upper half of the guide post 3 to fit tightly with the guide sleeve 8. The lower half provides support, enhancing the stability of the guide post 3 and preventing displacement of the punch 1 or die 2 due to external forces during the foaming process. An annular groove 11 is located in the middle of the upper half of the guide post 3, and the cross-sectional shape of the annular groove 11 matches the opening 14 at the end of the mold clamping handle 5.

[0036] A die 2 is located above the punch 1. The outer surface of the die 2 is circumferentially provided with a plurality of guide sleeves 8 that cooperate with the guide post 3 to guide the punch 1 and the die 2 to close. Each guide sleeve 8 is rotatably connected to a mold closing handle 5. The mold closing handle 5 rotates in a direction away from or towards the guide post 3. The end of the mold closing handle 5 facing the guide post 3 is provided with an opening 14.

[0037] Figure 5 This is a partial cross-sectional schematic diagram of the irregular-shaped cap forming mold provided in an embodiment of this application. See also... Figure 5 Specifically, the guide sleeve 8 is rectangular in shape, and its interior has a cavity whose shape matches the upper half of the guide sleeve 8. During mold closing, the cavity and the mating surface of the guide post 3 form a guiding path, guiding the die 2 to close accurately with the punch 1 in the vertical direction, effectively preventing mold damage or product defects caused by misalignment. The outer wall of the guide sleeve 8 also has a transverse channel running through it. When the guide post 3 is fitted onto the guide sleeve 8, the channel communicates with the opening 14, allowing the mold closing handle 5 to rotate to the channel, ensuring that the relative positions of the die 2 and the punch 1 are fixed in the closed state, preventing separation of the die 2 and the punch 1 under the action of foaming expansion force.

[0038] Furthermore, a pin hole is provided on the outer wall of the guide sleeve 8, and a corresponding pin hole is also provided on the connecting part of the mold clamping handle 5. By inserting the pin shaft into the two pin holes, the mold clamping handle 5 is connected to the guide sleeve 8. The rotation range of the mold clamping handle 5 around the pin shaft is 0° to 90°. At the 0° position, the locking end of the mold clamping handle 5 is separated from the annular groove 11 of the guide post 3 and is in an unlocked state. At the 90° position, the locking end is tightly fitted with the annular groove 11 and is in a locked state. In some other embodiments of this application, the mold clamping handle 5 may also be rotatably connected to the guide sleeve 8 using other rotation methods, which are not limited here.

[0039] In this embodiment, the shape of the opening 14 matches the annular groove 11 so that when the mold clamping handle 5 is rotated to fit the guide sleeve 8, the relative position of the die 2 and the punch 1 is locked. The outer surface of the die 2 is also provided with a plurality of lifting rings for the lifting device to pass through and lift the die 2. The top of the die 2 is provided with a sprue 6.

[0040] Specifically, the mold clamping handle 5 includes a handle end and a locking end. The handle end is used by the operator to grip and apply torque to achieve the rotation operation of the mold clamping handle 5. The locking end is used to cooperate with the annular groove 11 on the guide post 3 to achieve the locking function of the cavity mold 2 and the punch mold 1 in the mold clamping state. The locking end has an opening 14, the size of which is designed to match the shape and size of the annular groove 11, ensuring that when the mold clamping handle 5 is rotated to the locked position, the locking end can tightly fit the annular groove 11, thereby fixing the relative position of the cavity mold 2 and the punch mold 1.

[0041] Furthermore, the handle end can be treated with an anti-slip finish. The surface of the handle end can be designed with an anti-slip texture, such as diamond or circular raised textures, or a rubber anti-slip sleeve, to ensure that the operator can obtain sufficient friction when holding the handle. Before pouring the foaming agent and after the die 2 and the punch 1 are initially aligned and closed by the guide sleeve 8 and guide post 3, the operator rotates the mold closing handle 5 to make the opening 14 of the locking end fit with the annular groove 11 on the guide post 3, thus completing the locking operation.

[0042] In this embodiment, the outer surface of the die 2 is uniformly provided with multiple lifting ring openings. The lifting ring openings are circular in shape and are used by lifting devices to lift the die 2 during demolding. The position and number of lifting ring openings can be optimized according to the size and weight of the die 2 to ensure that the die 2 can remain balanced when lifted, and to avoid deformation or damage to the die 2 due to uneven tension of the lifting devices.

[0043] Meanwhile, a sprue 6 is provided on the top of the cavity 2. The sprue 6 is circular in shape and located at the highest point of the cavity of the cavity 2. It is used to pour the foaming agent into the cavity of the mold. The position and shape of the sprue 6 need to meet the requirement that the foaming agent can flow evenly into the cavity of the mold to avoid product defects caused by uneven pouring.

[0044] This embodiment employs guide pillars 3 and guide sleeves 8 for guidance, and the mold uses guide pillars 3 and guide sleeves 8 for guiding and positioning. The mold position is locked by the mold closing handle 5, eliminating the need for a press to complete mold closing and foaming, significantly reducing safety risks. The lifting ring on the cavity mold 2 in this embodiment facilitates lifting operations, making the mold opening process more convenient and safer, reducing labor intensity. The sprue 6 is located at the highest point of the cavity mold 2, which helps the material fill the cavity during pouring, improving product molding quality. Simultaneously, this embodiment allows auxiliary operations such as mold release agent application and mold cleaning to be performed in the open mold state, providing ample operating space and improving work efficiency. The locking mechanism after mold closing effectively resists the expansion force generated during the foaming process, ensuring mold closing stability and avoiding product defects caused by mold displacement. The mold structure provided in this embodiment is reasonable, simplifying the operation process and providing a foundation for multi-station assembly line production, which is beneficial for improving production efficiency and suitable for mass production scenarios.

[0045] In this embodiment, the end of the guide sleeve 8 away from the guide post 3 is provided with a threaded hole, and a mold opening bolt 7 is installed at the threaded hole. The mold opening bolt 7 passes through the threaded hole and abuts against the guide post 3 sleeved in the guide sleeve 8.

[0046] Specifically, the external thread of the mold-opening bolt 7 matches the internal thread of the threaded hole, and the head of the mold-opening bolt 7 is hexagonal. When the mold-opening bolt 7 is screwed into the threaded hole, the front end of the mold-opening bolt 7 abuts against the end face of the guide post 3. By turning the mold-opening bolt 7, an axial force can be applied, causing the guide post 3 to move axially along the guide sleeve 8, thereby realizing the pre-mold opening operation of the die 2. The purpose of the pre-mold opening operation is to reduce the adhesion force between the die 2 and the punch 1, facilitating the subsequent demolding operation. After the pre-mold opening is completed, the die 2 is lifted by passing a lifting tool through the lifting ring opening on the outer surface of the die 2. During the lifting process, it is ensured that the pulling force of the lifting tool is evenly distributed to avoid damage to the die 2. After the die 2 is lifted, the molded product is taken out, completing the entire process of foam molding of the irregular-shaped cover.

[0047] Figure 3 This is a schematic diagram of the structure of the die provided in an embodiment of this application.

[0048] See Figure 3 In this embodiment of the application, the inner periphery of the concave mold 2 is provided with a chamfer 10, and the top outer side of the punch 1 is provided with a conical surface or inclined surface that matches the chamfer 10.

[0049] Specifically, chamfer 10 is located at the entrance of the cavity of the die 2 to guide the punch 1 smoothly into the cavity. Chamfer 10 is provided on the inner periphery of at least two sides of the die 2. The conical surface or inclined surface matches the size of the chamfer 10, thereby ensuring that the punch 1 and the die 2 can fit tightly during the mold closing process, reducing mold damage and product defects caused by inaccurate alignment.

[0050] Figure 7 This is a schematic diagram of the structure of the casting plug provided in an embodiment of this application.

[0051] See Figure 7 In this embodiment of the application, the irregular cover forming mold further includes: a pouring plug 4, the pouring plug 4 is fixed to the pouring port 6, and a baffle 15 is provided at the end of the pouring plug 4 away from the pouring port 6. The orthographic projection of the baffle 15 on the cavity mold 2 covers the pouring port 6, and the cross-section of the baffle 15 is rectangular.

[0052] Specifically, the pouring plug 4 is fixed to the sprue 6 by a threaded connection or interference fit. The outer diameter of the pouring plug 4 matches the inner diameter of the sprue 6, ensuring that the pouring plug 4 can tightly seal the sprue 6 during the pouring process and prevent foaming agent leakage. The size design of the baffle 15 ensures that its orthographic projection on the die 2 can completely cover the sprue 6, preventing the foaming agent from overflowing from the sprue 6 during the pouring process, and also preventing the pouring plug 4 from falling off.

[0053] In this embodiment of the application, limit blocks 16 are provided at both ends of the baffle 15. The vertical height of the limit blocks 16 is greater than the vertical height of the baffle 15, and the lower surface of the limit blocks 16 is pressed against the upper surface of the baffle 15. The limit blocks 16 are provided with through holes, and screws pass through the through holes to fix the limit blocks 16 to the die 2.

[0054] Specifically, the limiting block 16 is stepped and divided into upper and lower parts. The upper part of the limiting block 16 presses against the upper surface of the baffle 15 to ensure that the baffle 15 will not shift due to external force during mold closing. The lower part of the limiting block 16 extends to the outer surface of the die 2 and is fixed to the die 2 by screws. The lower part of the limiting block 16 has a through hole through which screws pass to fix the limiting block 16 to the outer surface of the die 2.

[0055] Figure 8 This is another structural schematic diagram of the casting plug provided in an embodiment of this application.

[0056] See Figure 8 In this embodiment of the application, the outer surface of the pouring plug 4 is provided with at least four axially extending straight grooves 18, and the lower surface of the baffle 15 is provided with a recess 17. The straight grooves 18, the recess 17 and the pouring port 6 together form an exhaust overflow channel.

[0057] Specifically, the straight groove 18 ensures that gas and excess foaming agent can be evenly discharged during the foaming process. The recess 17 is located at the center of the baffle 15, directly opposite the sprue 6. The design of the recess 17 not only provides space for the venting and overflow channel, but also ensures that the foaming agent can smoothly enter the mold cavity during the pouring process, reducing product defects caused by gas accumulation. The straight groove 18, the recess 17, and the sprue 6 together form the venting and overflow channel. During the foaming process, gas and excess foaming agent enter the recess 17 through the straight groove 18, and then exit the mold cavity through the sprue 6.

[0058] Figure 6 This is a cross-sectional schematic diagram of the punch provided in an embodiment of this application.

[0059] See Figure 6 In this embodiment of the application, a ejector post 13 is provided inside the punch 1, and the ejector post 13 is at least partially exposed on the upper surface of the punch 1, and the ejector post 13 can move axially.

[0060] Specifically, the exposed part of the ejector pin 13 directly contacts the product during the demolding process. Through the axial movement of the ejector pin 13, the top surface of the ejector pin 13 directly acts on the inner surface of the product to lift the product off the punch 1, which facilitates subsequent demolding operations and avoids product tearing, deformation or surface damage caused by improper demolding.

[0061] In this embodiment, a screw 12 is provided inside the punch 1, and one end of the screw 12 protrudes from the outer wall of the punch 1. The axial direction of the screw 12 is perpendicular to the axial direction of the ejector pin 13, and the other end of the screw 12 abuts against the bottom outer wall of the ejector pin 13, so that the ejector pin 13 moves axially as the screw 12 rotates toward the inside of the punch 1.

[0062] Specifically, the screw 12 is disposed inside the punch 1, with one end protruding from the outer wall of the punch 1, facilitating rotation by the operator using a wrench or other tools. The other end of the screw 12 abuts against the bottom outer wall of the ejector pin 13, ensuring efficient force transmission. The rotational forward motion of the screw 12 is decomposed into a force perpendicular to the inclined plane through the interaction between the end of the screw 12 and the bottom inclined plane of the ejector pin 13. This vertical component of the force pushes the ejector pin 13 upward along its axial direction, thereby achieving product ejection.

[0063] In this embodiment, the end of the screw 12 that abuts against the top post 13 has a smooth, rounded end. In some other embodiments of this application, the end of the screw 12 that abuts against the top post 13 is provided with a guide slope for engaging with the bottom of the top post 13.

[0064] The smooth round end and guide slope can reduce the friction between the screw 12 and the ejector pin 13, ensuring the stability of the ejector pin 13 during axial movement. In some embodiments of this application, other end configurations can also be used, as long as the stability of the ejector pin 13 during axial movement is satisfied, and no limitation is made here.

[0065] This embodiment employs guide pillars 3 and guide sleeves 8 for guidance, and the mold uses guide pillars 3 and guide sleeves 8 for guiding and positioning. The mold position is locked by the mold closing handle 5, eliminating the need for a press to complete mold closing and foaming, significantly reducing safety risks. The lifting ring on the cavity mold 2 in this embodiment facilitates lifting operations, making the mold opening process more convenient and safer, reducing labor intensity. The sprue 6 is located at the highest point of the cavity mold 2, which helps the material fill the cavity during pouring, improving product molding quality. Simultaneously, this embodiment allows auxiliary operations such as mold release agent application and mold cleaning to be performed in the open mold state, providing ample operating space and improving work efficiency. The locking mechanism after mold closing effectively resists the expansion force generated during the foaming process, ensuring mold closing stability and avoiding product defects caused by mold displacement. The mold structure provided in this embodiment is reasonable, simplifying the operation process and providing a foundation for multi-station assembly line production, which is beneficial for improving production efficiency and suitable for mass production scenarios.

[0066] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0067] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0068] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A shaped cap forming mold characterized by, The irregular-shaped cap forming mold includes: A punch (1), wherein a plurality of guide posts (3) are circumferentially arranged on the outer surface of the punch (1), and an annular groove (11) is formed in the middle of the guide posts (3); and A die (2) is provided above the punch (1). The outer surface of the die (2) is provided with a plurality of guide sleeves (8) that cooperate with the guide post (3) to guide the punch (1) and the die (2) to close. Each guide sleeve (8) is rotatably connected to a mold closing handle (5). The mold closing handle (5) rotates in a direction away from or towards the guide post (3). The end of the mold closing handle (5) facing the guide post (3) is provided with an opening (14). The shape of the opening (14) matches the annular groove (11) so that when the mold clamping handle (5) is rotated to fit the guide sleeve (8), the relative position of the cavity mold (2) and the punch (1) is locked. The outer surface of the cavity mold (2) is also provided with a plurality of lifting rings for the lifting device to pass through and lift the cavity mold (2). The top of the cavity mold (2) is provided with a sprue (6).

2. A shaped cover forming die according to claim 1, wherein The guide sleeve (8) has a threaded hole at one end away from the guide post (3), and a mold opening bolt (7) is installed at the threaded hole. The mold opening bolt (7) passes through the threaded hole and abuts against the guide post (3) sleeved in the guide sleeve (8).

3. The shaped cover forming die of claim 1, wherein The inner periphery of the die (2) is provided with a chamfer (10), and the top outer side of the punch (1) is provided with a conical surface or inclined surface that matches the chamfer (10).

4. The shaped cover forming die of claim 1, wherein The irregular-shaped cap forming mold also includes: A pouring plug (4) is fixed to the pouring port (6). A baffle (15) is provided at one end of the pouring plug (4) away from the pouring port (6). The orthographic projection of the baffle (15) on the die (2) covers the pouring port (6). The cross-section of the baffle (15) is rectangular.

5. A contoured cap forming die according to claim 4, wherein Both ends of the baffle (15) are provided with limit blocks (16). The vertical height of the limit block (16) is greater than the vertical height of the baffle (15). The lower surface of the limit block (16) is pressed against the upper surface of the baffle (15). The limit block (16) is provided with a through hole. Screws pass through the through hole to fix the limit block (16) to the die (2).

6. A contoured cap forming die according to claim 5, wherein The outer surface of the pouring plug (4) is provided with at least four axially extending straight grooves (18), and the lower surface of the baffle (15) is provided with a recess (17). The straight grooves (18), the recess (17) and the pouring port (6) together form an exhaust overflow channel.

7. The shaped cover forming die of claim 1, wherein The punch (1) has an ejector pin (13) inside, and the ejector pin (13) is at least partially exposed on the upper surface of the punch (1). The ejector pin (13) can move axially.

8. A contoured cap forming die according to claim 7, wherein The punch (1) is provided with a screw (12) inside, and one end of the screw (12) protrudes from the outer side wall of the punch (1). The axial direction of the screw (12) is perpendicular to the axial direction of the ejector pin (13). The other end of the screw (12) abuts against the bottom outer side wall of the ejector pin (13) so that the ejector pin (13) moves axially as the screw (12) rotates toward the inside of the punch (1).

9. A contoured cap forming die according to claim 8, wherein The end of the screw (12) that abuts against the top post (13) has a smooth round end.

10. The shaped cap forming die of claim 8, wherein, The end of the screw (12) that abuts against the top post (13) is provided with a guide slope for cooperating with the bottom of the top post (13).

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