A ferrite core powder pressing die

Abstract

The present invention discloses a ferrite core powder pressing die, comprising a middle die, an outer upper punch seat, a lower punch seat and a processed product, wherein an inner upper punch cover is installed at the upper end of the outer upper punch seat, an inner upper punch pad is installed at the upper end of the inner upper punch cover, an inner upper punch seat is installed at the upper end of the inner upper punch pad, an outer upper punch cover is installed at the lower end of the outer upper punch seat, an outer upper punch cover is installed at the lower end of the outer upper punch cover, and an inner upper punch No. 1 and an inner upper punch No. 2 are arranged inside the outer upper punch. The ferrite core powder pressing die described in the present invention is designed with die punches for pressing, and the initial die design structure is a one-upper punch and four-lower punch structure, and the four lower punches adopt a split structure, and a rear-stage reinforcement design is adopted for small parts, so that the powder can be placed in a closed die cavity during pressing, thereby avoiding the occurrence of powder spraying. Through the improved two-upper punch and four-lower punch die scheme, ferrite cores can be mass-produced.

Description

Technical Field

[0001] The invention relates to the field of molds, in particular to a ferrite core powder pressing mold. Background Art

[0002] Ferrite core powder pressing mold is a supporting equipment for ferrite core powder processing and molding. Ferrite core powder needs to be molded and produced during processing. With the continuous development of science and technology, people have higher and higher requirements for the manufacturing process of ferrite core powder pressing mold.

[0003] The existing ferrite core powder pressing mold has certain disadvantages when used. First, the powder pressing process has extremely high requirements for the design, processing and manufacturing of the mold and the pressing process. Since the powder used in this product has extremely high hardness after sintering, machining is quite difficult, so the product needs to be formed in place at one time, which is not conducive to people's use. In addition, the upper end face of the product is a plane, but the outer chamfer is large, and the chamfer height accounts for about 35% of the total height of the product. The lower end face has three step surfaces. Although the outer ring and the inner ring are on the same plane, the inner and outer rings are not connected, which makes processing difficult and brings certain adverse effects to people's use. For this reason, we propose a ferrite core powder pressing mold. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides a ferrite core powder pressing mold, and mold punches are designed for pressing. The initial mold design structure is a one-upper punch and four-lower punch structure. The four lower punches adopt a split structure, and a rear-stage reinforcement design is adopted for small parts. During pressing, the powder can be placed in a closed mold cavity, thereby avoiding the occurrence of powder spraying. Through the improved two-upper punch and four-lower punch mold scheme, ferrite cores can be mass-produced, which can effectively solve the problems in the background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a ferrite core powder pressing mold, including a middle mold, an outer upper punch seat, a lower punch seat and a processed product, the upper end of the outer upper punch seat is equipped with an inner upper punch cover, the upper end of the inner upper punch cover is equipped with an inner upper punch pad, the upper end of the inner upper punch pad is equipped with an inner upper punch seat, the lower end of the outer upper punch seat is equipped with an outer upper punch cover, the lower end of the outer upper punch cover is equipped with an outer upper punch, and the interior of the outer upper punch is provided with a No. 1 inner upper punch and a No. 2 inner upper punch.

[0008] As a preferred technical solution of the present application, two lower punches are installed inside the middle die, a lower punch is installed at the connection between the middle die and the two lower punches, a lower punch cover is installed at the lower ends of the two lower punches, a lower punch seat is installed at the lower end of the lower punch cover, a lower punch gasket is installed at the lower end of the lower punch seat, two lower punch seats are installed at the bottom of the lower punch gasket, and two lower punch covers are installed at the upper ends of the two lower punch seats.

[0009] As a preferred technical solution of the present application, a two-lower punch gasket is installed at the lower end of the two-lower punch seat, and a three-lower punch cover, a positioning pin and a three-lower punch seat are installed on the inner side of the two-lower punch gasket. The inner walls of the middle die, the one-lower punch seat, the two-lower punch seat and the three-lower punch seat are provided with three-lower punches, a No. 1 four-lower punch and a No. 2 four-lower punch. The bottom of the No. 1 four-lower punch is installed with a four-lower punch seat, and a four-lower punch cover is installed on the outer side of the four-lower punch seat. A No. 1 four-lower punch gasket is installed at the bottom of the four-lower punch seat, a three-lower punch gasket is installed at the bottom of the two-lower punch gasket, and a No. 2 four-lower punch gasket is arranged at the lower end of the three-lower punch gasket.

[0010] As a preferred technical solution of the present application, positioning mechanisms are provided at both ends of the outer upper punch seat, a positioning groove is provided on the inner wall of the outer upper punch, a mounting support is installed at the end of the No. 1 inner upper punch, and a processing portion is opened on the surface of the processed product.

[0011] As a preferred technical solution of the present application, the outer upper punch seat and the outer upper punch cover are positioned by bolt positioning, and the inner upper punch seat, the inner upper punch pad, and the inner upper punch cover are positioned by bolt positioning.

[0012] As a preferred technical solution of the present application, the lower punch cover and the lower punch seat are positioned by bolt positioning, the lower punch seat and the lower punch gasket are positioned by bolt positioning, and the second lower punch seat and the second lower punch gasket are positioned by bolt positioning.

[0013] As a preferred technical solution of the present application, the three-lower punch cover and the three-lower punch seat are positioned by positioning pins, and the No. 1 four-lower punch, positioning mechanism, and three-lower punch are arranged in the internal positions of the middle die, the lower punch seat, the second lower punch seat, and the third lower punch seat for positioning.

[0014] As a preferred technical solution of the present application, the No. 1 four-down punch and the No. 2 four-down punch adopt a split structure, and the lower punch, the No. 1 four-down punch and the No. 2 four-down punch are fixed die punches.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present invention provides a ferrite core powder pressing mold, which has the following beneficial effects: the ferrite core powder pressing mold is designed with punches for pressing, the initial mold design structure is a one-upper punch and four-lower punch structure, the four lower punches adopt a split structure, and a rear-stage reinforcement design is adopted for small parts, so that the powder can be placed in a closed mold cavity during pressing, thereby avoiding the occurrence of powder spraying, and through the improved two-upper punch and four-lower punch mold scheme, ferrite cores can be mass-produced, the entire ferrite core powder pressing mold has a simple structure, is easy to operate, and has a better effect than the traditional method. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the overall structure of a ferrite core powder pressing mold of the present invention.

[0018] Figure 2 The present invention is a schematic structural diagram of an outer upper punch seat in a ferrite core powder pressing die.

[0019] Figure 3 The present invention is a schematic structural diagram of an outer upper punch in a ferrite core powder pressing die.

[0020] Figure 4 The present invention is a schematic structural diagram of two lower punches in a ferrite core powder pressing die.

[0021] Figure 5 The present invention is a schematic structural diagram of a No. 1 inner upper punch in a ferrite core powder pressing die.

[0022] Figure 6 It is a structural schematic diagram of a product processed in a ferrite core powder pressing mold of the present invention.

[0023] Figure 7 It is a structural schematic diagram of the other side of a product processed in a ferrite core powder pressing mold of the present invention.

[0024] In the figure: 1, middle die; 2, inner upper punch seat; 3, inner upper punch pad; 4, inner upper punch cover; 5, outer upper punch seat; 6, outer upper punch cover; 7, outer upper punch; 8, inner upper punch No. 1; 9, inner upper punch No. 2; 10, second lower punch; 11, lower punch; 12, lower punch cover; 13, lower punch seat; 14, lower punch pad; 15, third lower punch; 16, third lower punch cover; 17, positioning pin; 18, Three-lower punch seat; 19. No. 2 four-lower punch; 20. Two-lower punch cover; 21. Two-lower punch seat; 22. Two-lower punch gasket; 23. No. 1 four-lower punch; 24. Four-lower punch cover; 25. Four-lower punch seat; 26. No. 1 four-lower punch gasket; 27. No. 2 four-lower punch gasket; 28. Three-lower punch gasket; 29. ​​Positioning mechanism; 30. Positioning groove; 31. Mounting support; 32. Processed products; 33. Processing department. DETAILED DESCRIPTION

[0025] The technical scheme of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but it will be understood by those skilled in the art that the following described embodiments are part of embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. If specific conditions are not specified in the embodiments, they are carried out according to normal conditions or conditions recommended by the manufacturer. If the manufacturer is not specified in the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Embodiment 1:

[0029] like Figure 1-7 As shown, a ferrite core powder pressing mold includes a middle mold 1, an outer upper punch seat 5, a lower punch seat 13 and a processed product 32, the upper end of the outer upper punch seat 5 is installed with an inner upper punch cover 4, the upper end of the inner upper punch cover 4 is installed with an inner upper punch pad 3, the upper end of the inner upper punch pad 3 is installed with an inner upper punch seat 2, the lower end of the outer upper punch seat 5 is installed with an outer upper punch cover 6, the lower end of the outer upper punch cover 6 is installed with an outer upper punch 7, and the interior of the outer upper punch 7 is provided with a No. 1 inner upper punch 8 and a No. 2 inner upper punch 9.

[0030] Furthermore, two lower punches 10 are installed inside the middle die 1, a lower punch 11 is installed at the connection between the middle die 1 and the two lower punches 10, a lower punch cover 12 is installed at the lower end of the two lower punches 10, a lower punch seat 13 is installed at the lower end of the lower punch cover 12, a lower punch gasket 14 is installed at the lower end of the lower punch seat 13, two lower punch seats 21 are installed at the bottom of the lower punch gasket 14, and two lower punch covers 20 are installed at the upper end of the two lower punch seats 21.

[0031] Furthermore, the outer upper punch seat 5 and the outer upper punch cover 6 are positioned by bolt positioning, and the inner upper punch seat 2, the inner upper punch pad 3, and the inner upper punch cover 4 are positioned by bolt positioning.

[0032] Furthermore, a lower punch cover 12 and a lower punch seat 13 are positioned by bolts, a lower punch seat 13 and a lower punch gasket 14 are positioned by bolts, and a second lower punch seat 21 and a second lower punch gasket 22 are positioned by bolts.

[0033] Embodiment 2:

[0034] Based on the first embodiment, Figure 1-7 As shown, a ferrite core powder pressing mold includes a middle mold 1, an outer upper punch seat 5, a lower punch seat 13 and a processed product 32, the upper end of the outer upper punch seat 5 is installed with an inner upper punch cover 4, the upper end of the inner upper punch cover 4 is installed with an inner upper punch pad 3, the upper end of the inner upper punch pad 3 is installed with an inner upper punch seat 2, the lower end of the outer upper punch seat 5 is installed with an outer upper punch cover 6, the lower end of the outer upper punch cover 6 is installed with an outer upper punch 7, and the interior of the outer upper punch 7 is provided with a No. 1 inner upper punch 8 and a No. 2 inner upper punch 9.

[0035] Furthermore, a second lower punch gasket 22 is installed at the lower end of the second lower punch seat 21, and a third lower punch cover 16, a positioning pin 17 and a third lower punch seat 18 are installed on the inner side of the second lower punch gasket 22. The inner walls of the middle die 1, the first lower punch seat 13, the second lower punch seat 21 and the third lower punch seat 18 are provided with three lower punches 15, a No. 1 four lower punch 23 and a No. 2 four lower punch 19. A fourth lower punch seat 25 is installed at the bottom of the No. 1 four lower punch 23, and a fourth lower punch cover 24 is installed on the outer side of the four lower punch seat 25. A No. 1 four lower punch gasket 26 is installed at the bottom of the four lower punch seat 25, a third lower punch gasket 28 is installed at the bottom of the second lower punch gasket 22, and a No. 2 four lower punch gasket 27 is provided at the lower end of the third lower punch gasket 28.

[0036] Furthermore, the three lower punch covers 16 and the three lower punch seats 18 are positioned by positioning pins 17, and the No. 1 four lower punches 23, positioning mechanisms 29, and the three lower punches 15 are arranged in the internal positions of the middle die 1, the first lower punch seat 13, the second lower punch seat 21, and the third lower punch seat 18 for positioning.

[0037] Embodiment three:

[0038] On the basis of the first and second embodiments, Figure 1-7 As shown, a ferrite core powder pressing mold includes a middle mold 1, an outer upper punch seat 5, a lower punch seat 13 and a processed product 32, the upper end of the outer upper punch seat 5 is installed with an inner upper punch cover 4, the upper end of the inner upper punch cover 4 is installed with an inner upper punch pad 3, the upper end of the inner upper punch pad 3 is installed with an inner upper punch seat 2, the lower end of the outer upper punch seat 5 is installed with an outer upper punch cover 6, the lower end of the outer upper punch cover 6 is installed with an outer upper punch 7, and the interior of the outer upper punch 7 is provided with a No. 1 inner upper punch 8 and a No. 2 inner upper punch 9.

[0039] Furthermore, positioning mechanisms 29 are provided at both ends of the outer upper punch seat 5, a positioning groove 30 is provided on the inner wall of the outer upper punch 7, a mounting support 31 is installed at the end of the No. 1 inner upper punch 8, and a processing portion 33 is provided on the surface of the processed product 32.

[0040] Furthermore, the No. 1 four lower punches 23 and the No. 2 four lower punches 19 adopt a split structure, and the No. 1 four lower punches 11, the No. 1 four lower punches 23 and the No. 2 four lower punches 19 are fixed die punches.

[0041] Working principle: The present invention comprises a middle die 1, an inner upper punch seat 2, an inner upper punch pad 3, an inner upper punch cover 4, an outer upper punch seat 5, an outer upper punch cover 6, an outer upper punch 7, a No. 1 inner upper punch 8, a No. 2 inner upper punch 9, a No. 2 lower punch 10, a lower punch 11, a lower punch cover 12, a lower punch seat 13, a lower punch gasket 14, a third lower punch 15, a third lower punch cover 16, a positioning pin 17, a third lower punch seat 18, a No. 2 four lower punch 19, a second lower punch cover 20, a second lower punch seat 21, a second lower punch gasket 22, a No. 1 four lower punch 23, a fourth lower punch cover 24, a fourth lower punch seat 25, a No. 1 four lower punch gasket 26, a No. 2 four lower punch gasket 27, a third lower punch gasket 28, a positioning mechanism 29, a positioning groove 30, a mounting support 31, and a processed product 32. Processing section 33. When in use, the upper end face of the product is a plane, but the chamfer of the outer circumference is large, and the chamfer height accounts for about 35% of the total height of the product. The lower end face has three step surfaces. Although the outer ring and the inner ring are on the same plane, the inner and outer rings are not connected, so they need to be designed separately for pressing. The initial mold design structure is a one-upper punch and four-lower punch structure. Among the four lower punches, the lower punch 11 and the four lower punches are fixed punches, which are respectively installed on the bridge plate and the fixed template of the special powder press. By adjusting the connecting parts, ensure that their upper end faces are on the same plane. The second lower punch 10 and the third lower punch 15 are respectively installed on the lower and lower floating plates of the press. The powder filling height is adjusted by the floating cylinder of the press. The notch and two small The circular hole is formed by a boss arranged on the end face of the three-down punch 15. The bottom flange of the three-down punch 15 is designed with a positioning notch, and is positioned by a positioning pin 17 and a three-down punch seat 18 to ensure that the three-down punch 15 is fixed and cannot rotate, so as to facilitate the precise alignment of the notch and the circular hole of the outer upper punch 7. The four-down punch initially adopted an integral structure, but as a result, the smaller parts produced obvious bending deformation during the heat treatment process, so a split structure was used instead, and a rear-stage reinforcement design was adopted for the smaller parts. During the initial mold trial, since the outer chamfer of the outer upper punch 7 was relatively high, the inner upper punch was not designed in the initial design plan. During the actual debugging process, when the outer chamfer contacted the powder on the upper part of the mold cavity and began to be pressurized, the loose powder was compressed, which would cause the air in the powder to be squeezed out. When air flow is generated, powder near the edge of the notch and around the circular hole will overflow from the notch and small hole of the outer upper punch 7 with the air flow, resulting in too low density near the notch and making it impossible for the pressed blank to be formed. In order to improve this situation, an inner upper punch is designed, wherein two inner upper punches correspond to the small circular hole part of the product, and one inner upper punch corresponds to the notch of the product. During pressing, the inner upper punch first moves downward under the action of the inner upper template cylinder to press the boss of the three lower punches corresponding to the forming notch and circular hole, and adjusts its pressure to be less than the supporting force of the floating plate of the three lower punches to avoid the three lower punches from moving downward too early. In this way, the powder can be placed in a closed mold cavity during pressing, thereby avoiding the occurrence of powder spraying. Through the improved two-upper punch and four-lower punch mold scheme, the ferrite core trial mold was successfully put into mass production.

[0042] It should be noted that, in this article, relational terms such as first and second (number one, number two), etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0043] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A ferrite core powder compacting die, comprising a middle die (1), an outer upper punch seat (5), a lower punch seat (13) and a processed product (32), characterized in that: The upper end of the outer upper punch seat (5) is installed with an inner upper punch cover (4), the upper end of the inner upper punch cover (4) is installed with an inner upper punch pad (3), the upper end of the inner upper punch pad (3) is installed with an inner upper punch seat (2), the lower end of the outer upper punch seat (5) is installed with an outer upper punch cover (6), the lower end of the outer upper punch cover (6) is installed with an outer upper punch (7), and the inner part of the outer upper punch (7) is provided with a first inner upper punch (8) and a second inner upper punch (9); Two lower punches (10) are installed inside the middle die (1), a lower punch (11) is installed at the connection between the middle die (1) and the two lower punches (10), a lower punch cover (12) is installed at the lower end of the two lower punches (10), a lower punch seat (13) is installed at the lower end of the lower punch cover (12), a lower punch gasket (14) is installed at the lower end of the lower punch seat (13), two lower punch seats (21) are installed at the bottom of the lower punch gasket (14), and two lower punch covers (20) are installed at the upper ends of the two lower punch seats (21); The lower end of the second lower punch seat (21) is provided with a second lower punch gasket (22), the inner side of the second lower punch gasket (22) is provided with a third lower punch cover (16), a positioning pin (17) and a third lower punch seat (18), the inner walls of the middle die (1), the first lower punch seat (13), the second lower punch seat (21) and the third lower punch seat (18) are provided with a third lower punch (15), a first four lower punch (23) and a second four lower punch (19), the bottom of the first four lower punch (23) is provided with a fourth lower punch seat (25), the outer side of the fourth lower punch seat (25) is provided with a fourth lower punch cover (24), the bottom of the fourth lower punch seat (25) is provided with a first four lower punch gasket (26), the bottom of the second lower punch gasket (22) is provided with a third lower punch gasket (28), and the lower end of the third lower punch gasket (28) is provided with a second four lower punch gasket (27); Positioning mechanisms (29) are provided at both ends of the outer upper punch seat (5), a positioning groove (30) is provided on the inner wall of the outer upper punch (7), a mounting support (31) is installed at the end of the No. 1 inner upper punch (8), and a processing portion (33) is provided on the surface of the processed product (32).

2. The ferrite core powder pressing die according to claim 1, characterized in that: The outer upper punch seat (5) and the outer upper punch cover (6) are positioned by bolt positioning, and the inner upper punch seat (2), the inner upper punch pad (3) and the inner upper punch cover (4) are positioned by bolt positioning.

3. The ferrite core powder pressing die according to claim 1, characterized in that: The lower punch cover (12) and the lower punch seat (13) are positioned by bolt positioning, the lower punch seat (13) and the lower punch gasket (14) are positioned by bolt positioning, and the second lower punch seat (21) and the second lower punch gasket (22) are positioned by bolt positioning.

4. The ferrite core powder pressing die according to claim 1, characterized in that: The three lower punching cover (16) and the three lower punch seat (18) are positioned by a positioning pin (17), and the number one four lower punch (23), the positioning mechanism (29), and the three lower punch (15) are arranged in the inner position of the middle die (1), the lower punch seat (13), the second lower punch seat (21), and the third lower punch seat (18) for positioning.

5. The ferrite core powder pressing die according to claim 1, characterized in that: The first four lower punches (23) and the second four lower punches (19) adopt a split structure, and the first lower punch (11), the first four lower punches (23) and the second four lower punches (19) are fixed die punches.

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