Radial fold safety filter screen forming die and radial fold safety filter screen forming method

Abstract

The invention provides a radial fold safety filter screen forming mold and a radial fold safety filter screen forming method, and relates to the technical field of mold machining. The forming die comprises an upper die mechanism, a lower die mechanism, a first forming mechanism and a second forming mechanism. The upper die mechanism and the lower die mechanism are matched in a sliding mode. The first forming mechanism and the second forming mechanism are both mounted between the upper die mechanism and the lower die mechanism and are arranged at intervals; the first forming mechanism is used for forming the head shape of the safety filter screen body and the initial shape of a plurality of radial wrinkles distributed in the circumferential direction of the safety filter screen body at intervals; and the second forming mechanism is used for forming the safety filter screen body processed by the first forming mechanism, so that the radial folds meet the size requirement. When the mold is used for machining the filter screen, the forming quality of the filter screen is high, the filter screen is not prone to being damaged, and the yield is high.

Description

Technical Field

[0001] The invention relates to the technical field of mold processing, and in particular to a radial pleated safety filter forming mold and a radial pleated safety filter forming method. Background Art

[0002] The radial pleated safety filter is one of the important parts of various valve parts in the aviation hydraulic system. The part is small in size, complex in structure, difficult to form, and has high import costs and a long cycle. At present, the forming molds independently developed by domestic enterprises are mainly stamping. However, due to the small size and thin thickness of the parts, direct stamping will cause the filter to stretch severely, thereby destroying the shape and size of the filter pores, seriously affecting the performance of the safety filter. Summary of the invention

[0003] The object of the present invention is to provide a radial pleated safety filter forming die and a radial pleated safety filter forming method, which can reduce the damage to the shape and size of the filter pores, have high forming quality, and good filter performance.

[0004] The embodiment of the present invention is achieved as follows:

[0005] In a first aspect, the present invention provides a radial pleated safety filter forming die, comprising:

[0006] An upper mold mechanism, a lower mold mechanism, a first molding mechanism and a second molding mechanism; the upper mold mechanism and the lower mold mechanism are slidably matched; the first molding mechanism and the second molding mechanism are both installed between the upper mold mechanism and the lower mold mechanism, and the first molding mechanism and the second molding mechanism are arranged at intervals; the first molding mechanism is used to mold the head shape of the safety filter body and the preliminary shape of a plurality of radial folds arranged at intervals in its circumferential direction; the second molding mechanism is used to mold the safety filter body processed by the first molding mechanism so that the radial folds meet the size requirements.

[0007] In an optional embodiment, the first molding mechanism includes a first punch and a first die, one of the first punch and the first die is installed on the upper die mechanism, and the other of the first die is installed on the lower die mechanism, the first die is used to position the processed blank of the safety filter body, and the first punch is used to be plugged and matched with the first die to form the head shape of the safety filter body and the preliminary shape of multiple radial folds by stamping.

[0008] Based on the above scheme, the structure of the first forming mechanism is simple. Through the cooperation of the first convex die and the first concave die, multiple concave parts matching the radial folds can be formed on the processed blank at one time, which is conducive to the subsequent extrusion forming by the second forming mechanism. Since multiple concave parts are formed at one time, it is not easy to have processing errors caused by multiple positioning, and the forming quality is high; at the same time, it saves the steps of repeated stamping positioning and opening and closing the mold, and improves the processing efficiency.

[0009] In an optional embodiment, the first punch is provided with a conical punch head, and a plurality of forming protrusions arranged at intervals in the circumferential direction of the conical punch head are provided on the outer peripheral surface of the conical punch head; the first die is provided with a conical punching groove, and a plurality of forming concave portions arranged at intervals in the circumferential direction of the conical punching groove are provided on the groove peripheral wall of the conical punching groove; the plurality of forming protrusions correspond to the plurality of forming concave portions one by one.

[0010] Based on the above scheme, a plurality of forming protrusions cooperate with a plurality of forming recesses to realize one-time stamping forming of the processed blank, with high processing quality and high processing efficiency.

[0011] In an optional embodiment, one end of each of the forming protrusions close to the head end of the conical punch head is spaced from the head end; and one side of each of the forming concave portions close to the bottom of the conical punch groove is spaced from the bottom of the groove.

[0012] Based on the above scheme, with the cooperation of the first punch and the first die, the processed blank is formed into a conical shell shape, the bottom size of the processed blank is small, and the deformation capacity is small. The first punch and the first die will not perform stamping action at the bottom position of the processed blank, thereby reducing the external force applied to the bottom of the processed blank, reducing the probability of the bottom of the processed blank being damaged, and improving the yield rate of the product.

[0013] In an optional embodiment, the second forming mechanism includes a driving unit, a second punch and a second die, the driving unit and the second die are both mounted on one of the upper die mechanism and the lower die mechanism, and the second punch is mounted on the other of the upper die mechanism and the lower die mechanism; the second punch is used for extrusion cooperation with the second die; the driving unit is used for driving the second die to approach the second punch in the radial direction of the second punch, so as to form radial folds that meet the size requirements by extrusion.

[0014] Based on the above scheme, when the blank processed by the first molding mechanism is placed on the upper mold mechanism or the lower mold mechanism corresponding to the second die, the blank is positioned, and then the upper mold mechanism and the lower mold mechanism are molded together. At the same time, the driving unit pushes the second die close to the second punch, and the second punch and the second die cooperate to further extrude the concave position on the blank, and the size of the radial folds finally formed meets the set requirements. During the molding process, the second punch and the second die cooperate to position the blank and improve the molding quality.

[0015] In an optional embodiment, there are multiple second dies, which are arranged at intervals around the second punch, and the multiple second dies respectively correspond to the multiple radial folds one by one, and each of the second dies cooperates with the second punch to form a radial fold.

[0016] Based on the above scheme, each radial fold is formed by the corresponding second concave die, and the shape of each second concave portion can be adjusted according to the needs to meet different processing scenarios, with a wide range of uses and high forming quality. In addition, the multiple second concave dies are all close to the second convex portion in the middle, and the component force of each second concave die driving the intermediate blank to produce displacement is offset, and the intermediate blank is uniformly deformed toward the middle, not easy to shift, and has high forming quality.

[0017] In an optional embodiment, the driving unit includes a push rod, which is slidably engaged with the second die along a preset direction, and the push rod can drive the second die to approach the second punch in the radial direction of the second punch, the preset direction has an angle with the radial direction, and the preset direction is consistent with the sliding direction of the upper die mechanism and the lower die mechanism.

[0018] Based on the above scheme, the push rod applies thrust to the second die as the upper die mechanism and the lower die mechanism are closed, which is simple to control and saves energy.

[0019] In an optional embodiment, a first inclined surface is provided on the push rod, a second inclined surface is provided on the second die, and the first inclined surface is in contact with the second inclined surface.

[0020] Based on the above solution, force transmission is achieved through the cooperation of the first inclined surface and the second inclined surface, the structure is simple, and the force transmission is stable and reliable.

[0021] In a second aspect, the present invention provides a radial pleated safety filter forming method, which is applicable to the radial pleated safety filter forming mold described in any one of the aforementioned embodiments, and the method comprises the following steps:

[0022] Step s100, firstly using the first forming mechanism to form the processed blank into an intermediate blank having a head shape of the safety filter body and a preliminary shape of a plurality of radial folds spaced apart in the circumferential direction thereof;

[0023] Step s200: Then, the intermediate blank is formed by using the second forming mechanism so that the radial folds on the intermediate blank meet the size requirements, thereby obtaining an intermediate product.

[0024] In an optional embodiment, after step s200, the top surface and the bottom surface of the intermediate product are polished so that the height of the intermediate product meets the set requirements.

[0025] Based on the above solution, the safety filter body has high molding quality and high performance.

[0026] The beneficial effects of the embodiments of the present invention are:

[0027] In summary, the radial pleated safety filter forming die provided in this embodiment adopts the cooperation of the first forming mechanism and the second forming mechanism to process the blank in steps, which is less difficult than one-time processing and forming. The first forming mechanism is used to perform pre-forming by stamping, and a concave portion similar to the radial pleats of the safety filter body is formed on the blank. The size of the concave portion is different from the size of the radial pleats, and has not yet reached the required size of the radial pleats. Therefore, the deformation of the concave portion is small, and the external force applied to the concave portion during the stamping process is small, which is not easy to cause tearing or breaking, and is not easy to damage the filter structure. Then, the second forming mechanism is used to further extrude the intermediate blank, so that the intermediate blank is deformed from the outside to the inside, which is not easy to damage the structure of the filter itself. Since the concave portion has already undergone partial deformation, during the extrusion process, the deformation of the concave portion formed into radial pleats is small, and the forming is simpler. In addition, the intermediate blank is a conical shell. During the extrusion forming process using the second forming mechanism, the surrounding of the intermediate blank is deformed toward the middle, and the forming quality is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 is a schematic diagram of a safety filter body according to an embodiment of the present invention;

[0030] Figure 2 is a schematic diagram of a sheet according to an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of a radial pleated safety filter forming mold according to an embodiment of the present invention;

[0032] Figure 4 A top view of a lower mold mechanism according to an embodiment of the present invention;

[0033] Figure 5 is a schematic diagram of a first male mold according to an embodiment of the present invention;

[0034] Figure 6 is a schematic diagram of a first viewing angle of a first concave mold according to an embodiment of the present invention;

[0035] Figure 7 is a schematic diagram of a second viewing angle of a first concave mold according to an embodiment of the present invention;

[0036] Figure 8 is a schematic diagram of a first viewing angle of a second male mold according to an embodiment of the present invention;

[0037] Fig. 9 is a schematic diagram of a second perspective of a second male mold according to an embodiment of the present invention;

[0038] Fig.10 Schematic diagram of an intermediate blank according to an embodiment of the present invention.

[0039] icon:

[0040] 001-safety filter body; 011-micropores; 002-sheet; 003-intermediate blank; 100-upper die mechanism; 200-lower die mechanism; 300-first forming mechanism; 310-first punch; 311-conical punch head; 320-first die; 321-conical punch groove; 400-second forming mechanism; 410-driving unit; 411-first inclined surface; 420-second punch; 430-second die; 431-second inclined surface. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0045] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0046] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the prior art, when forming the safety filter, a stamping die is generally used for one-step forming, that is, after the blank is positioned on the die, a punch is used to approach the blank, and the punch and the forming cavity are used to form the blank in one step. Since the safety filter has multiple radial folds arranged in its circumference, and the number of mesh holes on the safety filter is large and the arrangement area is large, the safety filter itself has a weaker anti-deformation ability than the plate structure. One-step forming leads to a large deformation of the blank, which is easy to damage the safety filter and increase the manufacturing cost.

[0048] In view of this, the designer provides a radial pleated safety filter forming mold, which can reduce the damage to the mesh structure and other structures during the forming process, improve the forming quality, reduce the processing and manufacturing costs, and improve the economic benefits.

[0049] Please combine Figure 3-Figure 4In this embodiment, the radial pleated safety filter molding die includes an upper mold mechanism 100, a lower mold mechanism 200, a first molding mechanism 300 and a second molding mechanism 400; the upper mold mechanism 100 and the lower mold mechanism 200 are slidably matched; the first molding mechanism 300 and the second molding mechanism 400 are both installed between the upper mold mechanism 100 and the lower mold mechanism 200, and the first molding mechanism 300 and the second molding mechanism 400 are arranged at intervals; the first molding mechanism 300 is used to mold the head shape of the safety filter body 001 and the preliminary shape of a plurality of radial folds arranged at intervals in its circumferential direction; the second molding mechanism 400 is used to mold the safety filter body 001 processed by the first molding mechanism 300 so that the radial folds meet the size requirements.

[0050] Based on the above, the radial pleated safety filter forming mold provided in this embodiment works as follows:

[0051] For ease of description, the upper mold mechanism 100 is set above the lower mold mechanism 200, and the two are arranged in a vertical stacking manner. The upper mold mechanism 100 can be raised and lowered under the drive of a press machine and other equipment, so as to be close to the lower mold mechanism 200 to complete the mold closing or away from the lower mold mechanism 200 to achieve the mold opening, thereby meeting the mold opening and closing process in the mold production process. After the mold is opened, the blank can be loaded or the finished product can be unloaded. Among them, a guide mechanism can be set between the upper mold mechanism 100 and the lower mold mechanism 200 to play a role in guiding and positioning.

[0052] When in use, the first molding mechanism 300 and the second molding mechanism 400 cooperate to process the blank in steps, which is less difficult than one-time molding. The first molding mechanism 300 is first used for pre-forming by stamping to form a concave portion similar to the radial folds of the safety filter body 001 on the blank. The size of the concave portion is significantly different from the size of the radial folds and has not yet reached the required size of the radial folds. Therefore, the deformation of the concave portion is small, and the external force applied to the concave portion during the stamping process is small, which is not easy to cause tearing or breakage, and is not easy to damage the filter structure. Then, the second molding mechanism 400 is used to further extrude the intermediate blank 003, so that the intermediate blank 003 is deformed from the outside to the inside, which is not easy to damage the structure of the filter itself. Since the concave portion has already undergone partial deformation, the deformation of the concave portion formed into radial folds during the extrusion process is small, and the molding is simpler. In addition, the intermediate blank 003 is in a conical shell shape. During the extrusion molding process using the second molding mechanism 400, the surrounding areas of the intermediate blank 003 are deformed toward the middle, and the molding quality is higher.

[0053] The following embodiments illustrate the details of the radial pleated safety filter forming mold provided in the present application by way of examples.

[0054] Please combine Figure 3-Figure 9In this embodiment, optionally, the first molding mechanism 300 includes a first convex mold 310 and a first concave mold 320, one of which is installed on the upper mold mechanism 100, and the other is installed on the lower mold mechanism 200, the first concave mold 320 is used to position the processing blank of the safety filter body 001, and the first convex mold 310 is used to be plugged and matched with the first concave mold 320 to form the head shape of the safety filter body 001 and the preliminary shape of multiple radial folds by stamping. For example, the first convex mold 310 is installed on the upper mold mechanism 100, the first concave mold 320 is installed on the lower mold mechanism 200, and the first convex mold 310 is driven by the upper mold mechanism 100 to rise and fall relative to the first concave mold 320.

[0055] With such a design, the first molding mechanism 300 has a simple structure. Through the cooperation of the first convex die 310 and the first concave die 320, multiple concave portions matching the radial folds can be molded on the processed blank at one time, which is convenient for subsequent extrusion molding using the second molding mechanism 400. Since multiple concave portions are molded at one time, it is not easy to have a processing error caused by multiple positioning, and the molding quality is high; at the same time, it saves the steps of repeated stamping positioning and opening and closing the mold, and improves the processing efficiency.

[0056] Please combine Figure 5-Figure 7 Further, the first punch 310 is provided with a conical punch head 311, and the outer peripheral surface of the conical punch head 311 is provided with a plurality of molding protrusions arranged at intervals in the circumferential direction of the conical punch head 311, and one end of each molding protrusion close to the head end of the conical punch head 311 is spaced from the head end. The first die 320 is provided with a conical punching groove 321, and the groove peripheral wall of the conical punching groove 321 is provided with a plurality of molding concave parts arranged at intervals in the circumferential direction of the conical punching groove 321, and one side of each molding concave part close to the groove bottom of the conical punching groove 321 is spaced from the groove bottom; the plurality of molding protrusions are matched with the plurality of molding concave parts in a one-to-one correspondence.

[0057] It should be understood that the cooperation of multiple forming protrusions and multiple forming concave portions realizes one-time stamping of the processed blank, with high processing quality and high processing efficiency. At the same time, under the cooperation of the first convex die 310 and the first concave die 320, the processed blank is formed into a conical shell shape, the bottom size of the processed blank is small, and the deformation capacity is small. The first convex die 310 and the first concave die 320 will not perform stamping action at the bottom position of the processed blank, reducing the external force applied to the bottom of the processed blank, reducing the probability of the bottom of the processed blank being damaged, and improving the product yield.

[0058] For example, in this embodiment, the number of the molding protrusions and the number of the molding concave portions can both be twelve, so that twelve radial folds can be formed. Obviously, in other embodiments, when the number of radial folds changes, the number of the molding protrusions and the molding concave portions can be changed accordingly.

[0059] Please combine Figure 3 , Figure 8 and Fig. 9 In this embodiment, optionally, the second molding mechanism 400 includes a driving unit 410, a second male mold 420, and a second female mold 430. The driving unit 410 and the second female mold 430 are both installed on one of the upper mold mechanism 100 and the lower mold mechanism 200, and the second male mold 420 is installed on the other of the upper mold mechanism 100 and the lower mold mechanism 200; the second male mold 420 is used for extrusion matching with the second female mold 430; the driving unit 410 is used to drive the second female mold 430 to approach the second male mold 420 in the radial direction of the second male mold 420, so as to form radial wrinkles that meet the size requirements by extrusion. When the blank processed by the first molding mechanism 300 is placed on the upper mold mechanism 100 or the lower mold mechanism 200 corresponding to the second die 430, the blank is positioned, and then the upper mold mechanism 100 and the lower mold mechanism 200 are molded together. At the same time, the driving unit 410 pushes the second die 430 close to the second punch 420, and the second punch 420 and the second die 430 cooperate to further extrude the concave position on the blank, and the size of the radial folds finally formed meets the set requirements. During the molding process, the second punch 420 and the second die 430 cooperate to position the blank and improve the molding quality.

[0060] Optionally, the number of the second concave mold 430 is multiple, and the multiple second concave molds 430 are arranged at intervals around the second convex mold 420. The multiple second concave molds 430 are respectively matched with the multiple radial folds one by one, and each second concave mold 430 is matched with the second convex mold 420 to form a radial fold. For example, as can be seen from the above record, the number of second concave parts is the same as the number of radial folds, and can also be set to twelve. When in use, each radial fold is formed by the corresponding second concave mold 430, and the shape of each second concave part can be adjusted according to demand to meet different processing scenarios, with a wide range of uses and high molding quality. In addition, the multiple second concave molds 430 are all close to the second convex part in the middle, and the component force of each second concave mold 430 driving the intermediate blank 003 to produce displacement is offset, and the intermediate blank 003 is uniformly deformed toward the middle, not easy to shift, and has high molding quality. During operation, each second concave mold 430 corresponds to a driving unit 410, which is more convenient to control.

[0061] In this embodiment, the driving unit 410 can be optionally configured as a push rod, which is slidably matched with the second concave mold 430 along a preset direction, and the push rod can drive the second concave mold 430 to approach the second convex mold 420 in the radial direction of the second convex mold 420, the preset direction has an angle with the radial direction, and the preset direction is consistent with the sliding direction of the upper mold mechanism 100 and the lower mold mechanism 200. The push rod applies thrust to the second concave mold 430 as the upper mold mechanism 100 and the lower mold mechanism 200 are clamped, which is simple to control and saves energy.

[0062] Optionally, a first inclined surface 411 is provided on the push rod, and a second inclined surface 431 is provided on the second die 430, and the first inclined surface 411 contacts the second inclined surface 431. The angles of the first inclined surface 411 and the second inclined surface 431 are set as required, and when the push rod is driven by the upper die mechanism 100 to descend, the first inclined surface 411 can push the second inclined surface 431 to move horizontally, so that the second die 430 moves close to the second punch 420.

[0063] The radial pleated safety filter forming die provided in this embodiment forms the blank successively by means of stamping and extrusion. In the process of forming radial pleats, the blank is deformed reasonably, the mesh structure is not easily damaged, and the forming quality of the safety filter is high.

[0064] This embodiment also provides a radial pleated safety filter forming method, which is applicable to a radial pleated safety filter forming mold, and the method comprises the following steps:

[0065] Please combine Fig.10 Step s100: first, using the first forming mechanism 300, the processed blank is formed into an intermediate blank 003 having a head shape of the safety filter body 001 and a preliminary shape of a plurality of radial folds spaced apart in the circumferential direction thereof;

[0066] Step s200, then use the second forming mechanism 400 to form the intermediate blank 003 so that the radial folds on the intermediate blank 003 meet the size requirements, thereby obtaining an intermediate product.

[0067] Step s300, polish the top and bottom surfaces of the intermediate product so that the height of the intermediate product meets the set requirements. During polishing, the formed safety filter blank is placed in a polishing fixture for fixation, and the bottom plane of the safety filter is manually polished. Optionally, the fixed protrusions in the polishing fixture match the size of the radial folds, and the material of the polishing fixture is tungsten steel with a thickness of about 3.0 mm. The purpose of polishing is mainly to form the bottom plane of the pleated filter and control the height of the safety filter.

[0068] The method is used to process the safety filter, which reduces the tensile deformation of the blank of the safety filter and the influence of the micropores 011 of the safety filter, improves the existing pleated safety filter forming process, and improves the performance of the safety filter.

[0069] For example, the radial pleated safety filter forming mold and forming method provided in this embodiment can be used for the following specific forming process of the safety filter body 001.

[0070] Please combine Figure 1 The number of radial folds of the safety filter body 001 is twelve and they are evenly distributed circumferentially. The diameter of the outer circle of the radial folds is about 3.20 mm, the diameter of the inner circle is about 1.70 mm, the height is about 3.0 mm, and the diameter of the micropore 011 is 0.10 mm. Figure 2 To process the blank of the radial pleated safety filter blank, the blank is a circular sheet 002, which is prepared by a photochemical etching process. The blank material can be 304 stainless steel, with a thickness of about 0.1 mm. The outer diameter of the micropore 011 filter is 7.40 mm, the diameter of the micropore 011 is 0.10 mm, and the micropores 011 are arranged in concentric circles. The number of micropores 011 is about 1450.

[0071] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A radial pleated safety filter forming die, characterized in that: include: An upper mold mechanism (100), a lower mold mechanism (200), a first molding mechanism (300) and a second molding mechanism (400); the upper mold mechanism (100) and the lower mold mechanism (200) are slidably matched; the first molding mechanism (300) and the second molding mechanism (400) are both installed between the upper mold mechanism (100) and the lower mold mechanism (200), and the first molding mechanism (300) and the second molding mechanism (400) are arranged at intervals; the first molding mechanism (300) is used to mold the head shape of the safety filter body (001) and the preliminary shape of a plurality of radial folds arranged at intervals in the circumferential direction thereof; the second molding mechanism (400) is used to mold the safety filter body (001) processed by the first molding mechanism (300) so that the radial folds meet the size requirements.

2. The radial pleated safety filter forming mold according to claim 1, characterized in that: The first molding mechanism (300) comprises a first convex mold (310) and a first concave mold (320), one of the first convex mold (310) and the first concave mold (320) is installed on the upper mold mechanism (100), and the other of the first convex mold (310) and the first concave mold (320) is installed on the lower mold mechanism (200), the first concave mold (320) is used to position the processing blank of the safety filter body (001), and the first convex mold (310) is used to be plugged and matched with the first concave mold (320) to form the head shape of the safety filter body (001) and the preliminary shape of multiple radial folds by stamping.

3. The radial pleated safety filter forming mold according to claim 2, characterized in that: The first punch (310) is provided with a conical punch head (311), and a plurality of molding protrusions are arranged at intervals in the circumferential direction of the conical punch head (311) on the outer peripheral surface of the conical punch head (311); the first die (320) is provided with a conical punch groove (321), and a plurality of molding concave portions are arranged at intervals in the circumferential direction of the conical punch groove (321) on the groove peripheral wall; the plurality of molding protrusions correspond to the plurality of molding concave portions one by one.

4. The radial pleated safety filter forming mold according to claim 3, characterized in that: One end of each of the molding protrusions close to the head end of the conical punch head (311) is spaced from the head end; and one side of each of the molding concave portions close to the bottom of the conical punch groove (321) is spaced from the bottom of the groove.

5. The radial pleated safety filter forming mold according to claim 1, characterized in that: The second molding mechanism (400) comprises a driving unit (410), a second punch (420) and a second die (430); the driving unit (410) and the second die (430) are both mounted on one of the upper die mechanism (100) and the lower die mechanism (200); the second punch (420) is mounted on the other of the upper die mechanism (100) and the lower die mechanism (200); the second punch (420) is used for extrusion-matching with the second die (430); the driving unit (410) is used for driving the second die (430) to approach the second punch (420) in the radial direction of the second punch (420), so as to form radial folds that meet the size requirements by extrusion.

6. The radial pleated safety filter forming mold according to claim 5, characterized in that: There are multiple second concave dies (430), and the multiple second concave dies (430) are arranged at intervals around the second convex die (420). The multiple second concave dies (430) respectively correspond to multiple radial folds one by one, and each second concave die (430) cooperates with the second convex die (420) to form a radial fold.

7. The radial pleated safety filter forming mold according to claim 5, characterized in that: The driving unit (410) includes a push rod, which is slidably matched with the second die (430) along a preset direction, and the push rod can drive the second die (430) to approach the second punch (420) in the radial direction of the second punch (420), the preset direction has an angle with the radial direction, and the preset direction is consistent with the sliding direction of the upper die mechanism (100) and the lower die mechanism (200).

8. The radial pleated safety filter forming die according to claim 7, characterized in that: The push rod is provided with a first inclined surface (411), the second concave mold (430) is provided with a second inclined surface (431), and the first inclined surface (411) is in contact with the second inclined surface (431).

9. A method for forming a radial pleated safety filter, characterized in that: The radial pleated safety filter forming mold applicable to any one of claims 1 to 8 comprises the following steps: Step s100, first using the first forming mechanism (300) to form an intermediate blank (003) having a head shape of the safety filter body (001) and a preliminary shape of a plurality of radial folds spaced apart in the circumferential direction thereof; Step s200: Then, the intermediate blank (003) is formed by using the second forming mechanism (400) so that the radial wrinkles on the intermediate blank (003) meet the size requirements, thereby obtaining an intermediate product.

10. The radial pleated safety filter forming method according to claim 9, characterized in that: After step s200, the top surface and the bottom surface of the intermediate product are polished so that the height of the intermediate product meets the set requirements.

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