CN209552023U - A kind of band groove permanent-magnet ferrite loudspeaker magnetic steel die structure - Google Patents
A kind of band groove permanent-magnet ferrite loudspeaker magnetic steel die structure Download PDFInfo
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- CN209552023U CN209552023U CN201821475143.8U CN201821475143U CN209552023U CN 209552023 U CN209552023 U CN 209552023U CN 201821475143 U CN201821475143 U CN 201821475143U CN 209552023 U CN209552023 U CN 209552023U
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Abstract
The utility model provides a kind of band groove permanent-magnet ferrite loudspeaker magnetic steel die structure, is related to technical field of mechanical processing.It includes mould bases, connect with mould bases type core, the lower die connect with type core retainer plate, lower die is magnetic conduction cylindrical structure, and lower die upper surface is connected with the punch-pin of non-magnetic disc structure, and punch-pin is equipped with several boss, and boss protrusion punch-pin upper surface is uniformly distributed.The utility model solve in the prior art to have on end face reeded permanent-magnet ferrite magnet steel cannot a compression moulding need to increase other structures, production process is complicated, installs inconvenient technical problem.The utility model has the beneficial effect that permanent-magnet ferrite loudspeaker magnetic steel band groove is processed and formed at one time, and reduces product producer component and mounting process, has saved cost.Mould structure is reasonable, and converted products material good fluidity improves yield rate.Die manufacturing cost is low.
Description
Technical field
The utility model relates to technical fields of mechanical processing, more particularly, to a kind of processing band groove permanent-magnet ferrite loudspeaker
The mold of magnet steel.
Background technique
Currently, be applied in the electronic products such as loudspeaker in horn-like permanent-magnet ferrite magnet steel shape be cylindrical body,
It is suppressed with mold.Chinese patent Authorization Notice No. CN205928987U, it is authorized announcement date on 2 8th, 2017, entitled
The utility model of " a kind of permanent-magnet ferrite magnetic steel die chamfering lower die ", discloses a kind of lower die structure for producing this kind of product.
Including lower mould body, the shape of lower mould body is cylindrical, and one end of lower mould body is end face, is set on end face there are two chamfering,
Respectively inner chamfer and outer chamfer, inner chamfer are disposed adjacent to the inner circle of lower mould body, and outer chamfer is disposed adjacent to lower mould body
At outer circle, the cross-sectional shape of inner chamfer and the cross-sectional shape of outer chamfer are consistent, and the cross-sectional shape of outer chamfer is ladder
Shape.The face of the end face contact of the permanent-magnet ferrite magnet steel of this structure production is plane, is applied in the electronic products such as loudspeaker
In horn-like permanent-magnet ferrite magnet steel, there is groove on wherein at least one end face.In this way, it is also necessary to increase other structures,
Production process is not only increased, is also inconvenient to install.
Utility model content
In order to solve in the prior art to have on end face reeded permanent-magnet ferrite magnet steel cannot a compression moulding need
Increase other structures, production process is complicated, installs inconvenient technical problem, and the utility model provides a kind of band groove permanent magnetism
Ferrite loudspeaker magnetic steel die structure reduces user's production cost.
The technical solution of the utility model is: a kind of band groove permanent-magnet ferrite loudspeaker magnetic steel die structure, it includes mould
Frame, the type core connecting with mould bases, the lower die connect with type core retainer plate, lower die are magnetic conduction cylindrical structure, and lower die upper surface is connected with non-
The punch-pin of magnetic conduction disc structure, punch-pin are equipped with several boss, and boss protrusion punch-pin upper surface is uniformly distributed.
Preferably, boss section be it is trapezoidal, boss it is trapezoidal bottom be overlapped with punch-pin upper surface, width A, upper bottom are convex
It rises, is highly width B, H, A:B 2:1, H:A 1:3.
Preferably, boss section may be circular arc, boss arc surface width is A, is highly H, H:A 1:3.
It is integrated preferably, boss is smoothly connected with punch-pin upper surface.
Compared with prior art, the utility model has the beneficial effects that permanent-magnet ferrite loudspeaker magnetic steel band groove once adds
Work molding, reduces product producer component and mounting process, has saved cost.Mould structure is reasonable, converted products powder or paddle material
Good fluidity improves yield rate.Die manufacturing cost is low.
Detailed description of the invention
Attached drawing 1 is the utility model connection schematic diagram；
Attached drawing 2 connects perspective view with punch-pin for lower die；
Attached drawing 3 is the connection figure that lower die connects another embodiment with punch-pin；
Attached drawing 4 is the top view of Fig. 3.
In figure: 1- mould bases；2- type core；3- lower die；4- blank material；5- upper mold；31- punch-pin；311- boss.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment 1:
As illustrated in fig. 1 and 2, a kind of band groove permanent-magnet ferrite loudspeaker magnetic steel die structure, it includes mould bases 1 and mould bases 1
The type core 2 of connection, the lower die 3 being socketed with type core 2, upper mold 5.Lower die 3 is magnetic conduction cylindrical structure.Core bore is equipped among lower die 3,
Core bore and type core 2 are socketed.3 lower end surface of lower die and the backing plate of mould bases 1 are fixed.3 upper surface of lower die is connected with non-magnetic disc structure
Punch-pin 31.The blank 4 of permanent-magnet ferrite loudspeaker magnet steel is connected with above punch-pin 31.In general, under 3 upper surface of lower die and punch-pin 31
End face is by being welded and fixed.Punch-pin 31 is equipped with several boss 311.Blank material 4 is with powder or with the slurry of moisture.Due to mold
At work, 4 compression ratio of blank material at 311 position of boss is big, and density can be than 31 density of punch-pin at no 311 position of boss
Height, density contrast cross conference and blank 4 after sintering are caused to crack.The non-magnetic disc structure of punch-pin 31 is driven due to the influence in magnetic field
The place of powder toward non-magnetic book is walked, and so as to reduce the density at boss position, equilibrium density is poor.Guarantee that blank material 4 shapes
It does not crack afterwards.Depending on design requirement of the quantity of boss 311 by blank material 4.31 upper surface of the raised punch-pin of boss 311.Fig. 2 shows
Boss 311 have four, be it is one such, be merely illustrative.Four boss 311 are evenly distributed with and 31 upper surface of punch-pin.Boss
311 punch-pin, 31 length direction is consistent with the diameter direction of extension of 31 upper surface of punch-pin.311 section of boss is trapezoidal.Usually without spy
Different to require, section is isosceles trapezoid.Boss 311 it is trapezoidal bottom be overlapped with 31 upper surface of punch-pin, upper 31 upper surface of bottom protrusion punch-pin.
In view of the density change of blank material 4 can be the process of a gradual change, the width of the trapezoidal bottom of boss 311 is the width of A, upper bottom
Degree is B, is highly the distance between upper and lower bottom H().The width of bottom is A and the width at upper bottom be the ratio between B is two-to-one.It is high
Degree is H and the width of bottom be the ratio between A is one to three.In order to reduce 4 material of blank forming after crack, the upper surface of boss 311, tiltedly
Face, side and 31 upper surface of punch-pin are smoothly connected and are integrated.When work, before molding, first blank material 4 is filled on punch-pin 31
Side.Blank material 4 can be the slurry with moisture, be also possible to dry powder, and material is loose at this time.Rear upper mold 5 has been filled to mould bases 1
Direction pressure molding, then upper mold 5 is floated downwardly together with lower die 3, and line packet provides magnetic field, after reaching certain pressure, hair at this time
4 compression moulding of blank.It rises and opens upper mold 5, taking out molding blank material 4 is band groove permanent-magnet ferrite loudspeaker magnetic steel product hair
Base.
Embodiment 2:
As shown in Figures 3 and 4, the section of boss 311 can also be circular arc, i.e. a part that is cylindrical sides of boss 311,
The bus of cylindrical body and the diameter parallel of punch-pin 31.The quantity of boss 311 still by the design requirement of blank 4 depending on.Show in figure
Boss 311 out has four, be it is one such, be merely illustrative.The width of 311 arc surface of boss, i.e. boss 311 and punch-pin
The junction of 31 upper surfaces, width A.The height of boss 311, the i.e. highest point of 31 upper surface of punch-pin to 311 arc surface of boss are high
Degree is H.H:A is 1:3.It cracks to reduce blank 4, the junction of 311 lower end of boss and 31 upper surface of punch-pin is by arc transition
It is smoothly connected and is integrated.
Claims (4)
1. a kind of band groove permanent-magnet ferrite loudspeaker magnetic steel die structure, it includes mould bases (1), the type core that connect with mould bases (1)
(2), the lower die (3) being socketed with type core (2), it is characterised in that: the lower die (3) is magnetic conduction cylindrical structure, lower die (3) upper end
Face is connected with the punch-pin (31) of non-magnetic disc structure, and the punch-pin (31) is equipped with several boss (311), boss (311) protrusion
Punch-pin (31) upper surface is uniformly distributed.
2. a kind of band groove permanent-magnet ferrite loudspeaker magnetic steel die structure according to claim 1, it is characterised in that: described
Boss (311) section be it is trapezoidal, the trapezoidal bottom of boss (311) is overlapped with punch-pin (31) upper surface, and width A, upper bottom are raised, wide
Degree be B, be highly H, A:B 2:1, H:A 1:3.
3. a kind of band groove permanent-magnet ferrite loudspeaker magnetic steel die structure according to claim 1, it is characterised in that: described
Boss (311) section is circular arc, and boss (311) arc surface width is A, is highly H, H:A 1:3.
4. a kind of band groove permanent-magnet ferrite loudspeaker magnetic steel die structure according to claim 1 or 2 or 3, feature exist
In: boss (311) is smoothly connected with punch-pin (31) upper surface and is integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821475143.8U CN209552023U (en) | 2018-09-10 | 2018-09-10 | A kind of band groove permanent-magnet ferrite loudspeaker magnetic steel die structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821475143.8U CN209552023U (en) | 2018-09-10 | 2018-09-10 | A kind of band groove permanent-magnet ferrite loudspeaker magnetic steel die structure |
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| Publication Number | Publication Date |
|---|---|
| CN209552023U true CN209552023U (en) | 2019-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821475143.8U Active CN209552023U (en) | 2018-09-10 | 2018-09-10 | A kind of band groove permanent-magnet ferrite loudspeaker magnetic steel die structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN209552023U (en) |
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