CN101930839A - Mould for molding magnetic core of soft ferrite - Google Patents
Mould for molding magnetic core of soft ferrite Download PDFInfo
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- CN101930839A CN101930839A CN2009100318757A CN200910031875A CN101930839A CN 101930839 A CN101930839 A CN 101930839A CN 2009100318757 A CN2009100318757 A CN 2009100318757A CN 200910031875 A CN200910031875 A CN 200910031875A CN 101930839 A CN101930839 A CN 101930839A
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Abstract
The invention discloses a mould for molding the magnetic core of a soft ferrite, wherein a middle mould can axially slide a set distance and is radially positioned on a mould base in a fastening manner; the upper of the middle mould is provided with a molding groove, the downside thereof is respectively provided with a low punching hole 1 and a lower punching hole 2 the upper ends of which are communicated with the molding groove of the middle mould; the lower end of a lower punch 1 is fixedly arranged on the mould base, the upper end of the lower punch 1 is axially inserted in the lower punching hole 1 of the middle mould in a sliding mode, the lower end of a lower punch 2 can axially slide a set distance and is radially positioned on the mould base in a fastening manner, the upper end of the lower punch 2 is axially inserted in the lower punching hole 2 of the middle mould in a sliding manner, and the lower end of an upper punch is axially inserted in the molding groove on the upside of the middle mould. In the invention, the lower punch 1 and the lower punch 2 solely perform counter press on the upper punch to form the foot and the middle column of the product, namely respectively control the size and density of the foot and the middle column, an air gap of the middle column is preset, therefore only the thickness of the foot but not the middle column needs to be ground during subsequent grinding processes of products, thus reducing scrappage of the products and saving labor cost.
Description
Technical field
The present invention relates to a kind of metal molding die, particularly a kind of mould for molding magnetic core of soft ferrite.
Background technology
In recent years, the trend of field apparatus components such as computer, video recording and communication apparatus is to do littler and littler, also just more and more higher to magnetic core small size and high-precision requirement simultaneously, especially higher for the requirement of the accuracy of magnetic core air gap, tradition air gap class magnetic core processing method is by adjusting small-sized air gap grinder station, and operating personnel carry out the air gap attrition process one by one to product.General air gap class magnetic core commonly used, its preparation technology is many by rotary moulding board straight forming, after high temperature sintering, semi-finished product size attrition process, adopts the small hand grinder need process air gap part attrition process air gap to it.This kind air gap class magnetic core producing process generally will pass through green compact moulding, sintering, attrition process, air gap processing technology, the defective that this air gap processing method exists is: it is bigger influenced by human factor in the magnetic core air gap course of processing, magnetic core air gap dimensional accuracy is restive, properties of product have been influenced, the product yield is lower, while product process flow complexity, cost of labor is higher, production capacity is lower, labor strength is big, waste time and energy, in air gap processing, inevitably have the problems such as waste of raw material.
Summary of the invention
In order to remedy above deficiency, the invention provides a kind of mould for molding magnetic core of soft ferrite, use this mould can preset magnetic ferrites magnetic core air gap, make things convenient for controlling magnet ferrite core size of gaps, improve the precision and the yield of product, reduced cost of labor.
The present invention for the technical scheme that solves its technical problem and adopt is: a kind of mould for molding magnetic core of soft ferrite, comprise upper punch, middle mould, next dashes, following two punch and mould bases, to use direction to be benchmark, in mold shaft be positioned on the mould bases to setpoint distance radial stop slidably, middle mould upside is provided with shaping groove, should be respectively equipped with next punching and following two punch hole by middle mould downside, this next punching and following two punch hole upper end are communicated with the shaping groove of middle mould, next sweeps away end and is fixedly arranged on the mould bases, next rushes to end and axially slidably is inserted in next punching of middle mould, the following two punch lower end axially slidably the setpoint distance radial stop be positioned on the mould bases, the following two punch top axial slidably is inserted in the following two punch hole of middle mould, the upper punch lower end axially slidably is inserted in the shaping groove of middle mould upside, the upper punch upper end detachably is fixedly arranged on the hold-down devices of pressure forming machine, mould bases detachably is fixedly arranged on the workbench of pressure forming machine, during use, powder is filled and presented in the shaping groove of middle mould, on be punched under the drive of the hold-down devices of pressure forming machine and move downward, material powder in the shaping groove of upper punch lower end centering mould carries out the precompressed setting-up time, upper punch then, in mould and following two punch together respectively correspondence move downward upper punch and set its position, middle mould desired location and following two punch desired location, this moment, upper punch was dashed with next respectively, middle mould and following two punch produce pressing, product pin and center pillar are pressed into setting size and density, because it is separate with following two punch that next dashes, therefore effectively guaranteed the adjustable of column dimension and density in the product, be that the center pillar height is lower than the pin height, preset the air gap of center pillar.
Further improvement as a kind of mould of the present invention, in mold shaft to the structure that setpoint distance radial stop slidably is positioned on the mould bases be: be provided with first cylinder and a middle mould baffle plate, the cylinder body lower end of this first cylinder is fixedly arranged on the mould bases, the piston rod upper end of first cylinder is connected with middle mould lower surface, middle mould baffle plate is fixed positioned on the mould bases of middle mould below setpoint distance, when first cylinder piston rod moves upward under gas pressure, middle mould also moves upward, can insert the material powder in the concave groove of middle mould this moment, in upper punch presses down during mould, middle mould also moves downward, after middle mould moves downward middle mould desired location, in the mould lower end only peak in the mould baffle plate, can't move downward again, this moment, upper punch and next were dashed, following two punch is finished the powder compacting jointly.
Further improvement as a kind of mould of the present invention, the structure that the axial slidably setpoint distance radial stop in following two punch lower end is positioned on the mould bases is: be provided with at least one second cylinder and following two punch baffle plate, the cylinder body lower end of this second cylinder is fixedly arranged on the mould bases, the piston rod upper end of this second cylinder is fixed positioned in the following two punch lower end, the following two punch baffle plate is fixed positioned on the mould bases of following two punch below setpoint distance, when on rush at when motion, when the piston rod of second cylinder of following two punch moves downward the following two punch desired location under pressure, the following two punch lower end only peaks at the following two punch baffle plate, can't move downward, upper punch and following two punch are finished powder jointly and are suppressed compacting size and the density that guarantees the product center pillar at this moment again.
As the further improvement of a kind of mould of the present invention, the quantity of second cylinder is two, is symmetrically distributed in the following two punch both sides, so just guarantees the following two punch stress balance, and it is crooked to prevent that following two punch from taking place, and effectively guarantees the size and the density accuracy of compacting center pillar.
Further improvement as a kind of mould of the present invention, middle mould baffle plate and following two punch baffle plate lower end are equipped with the external screw thread of preseting length, be provided with first gear and second gear, first gear is provided with internal thread, the middle mould baffle plate and the external screw thread of following two punch baffle plate lower end and the internal thread activity of first gear are connected with a joggle, first gear and the engagement of second gear teeth, second gear is fixed positioned on the mould bases, like this as long as regulate the second gear rotational angle, second gear just drives first gear by engagement and rotates, mould baffle plate and following two punch baffle plate moved up and down during first gear rotated and just drives, thereby play the fine setting effect that centering mould and following two punch move downward the position, further guaranteed the size precision of product.
Useful technique effect of the present invention is: among the present invention in use, next forms the pin and the center pillar of product to pressure towards and upper punch independent with following two punch, next dashes and following two punch does not interfere with one another, can distinguish the size and the density of control pin and center pillar, realized that the height of green compact center pillars is lower than the height of pin, thereby preset the center pillar air gap, make product in follow-up grinding magnetic core size operation, only need to grind magnetic ferrite magnetic core pin thickness to setting size, center pillar then need not to grind, reduced product scrappage, saved cost of labor.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Embodiment: a kind of mould for molding magnetic core of soft ferrite, comprise upper punch 1, middle mould 2, next dashes 3, following two punch 4 and mould bases 5, to use direction to be benchmark, in mould 2 axially slidably the setpoint distance radial stop be positioned on the mould bases 5, middle mould 2 upsides are provided with shaping groove 21, should be respectively equipped with next punching 22 and following two punch hole 23 by middle mould 2 downsides, this next punching 22 and following two punch hole 23 upper ends are communicated with the shaping groove 21 of middle mould 2, next dashes 3 lower ends and is fixedly arranged on the mould bases 5, next dashes 3 top axials and slidably is inserted in next punching 22 of middle mould, following two punch 4 lower ends axially slidably the setpoint distance radial stop be positioned on the mould bases 5, following two punch 4 top axials slidably are inserted in the following two punch hole 23 of middle mould, upper punch 1 lower end axially slidably is inserted in the shaping groove 21 of middle mould upside, upper punch 1 upper end detachably is fixedly arranged on the hold-down devices of pressure forming machine, mould bases 5 detachably is fixedly arranged on the workbench of pressure forming machine, during use, powder is filled and presented in the shaping groove 21 of middle mould 2, upper punch 1 is moving downward under the drive of the hold-down devices of pressure forming machine, material powder in the shaping groove 21 of upper punch 1 lower end centering mould 2 carries out the precompressed setting-up time, upper punch then, in mould and following two punch 4 together respectively correspondence move downward upper punch and set its position, middle mould desired location and following two punch desired location, this moment, upper punch was dashed with next respectively, middle mould and following two punch produce pressing, product pin and center pillar are pressed into setting size and density, because next is separate with following two punch 4 towards 3, therefore effectively guaranteed the adjustable of column dimension and density in the product, be that the center pillar height is lower than the pin height, preset the air gap of center pillar.
The structure that the middle mould 2 axial slidably setpoint distance radial stops of described mould are positioned on the mould bases 5 is: be provided with first cylinder 24 and a middle mould baffle plate 25, the cylinder body lower end of this first cylinder 24 is fixedly arranged on the mould bases 5, the piston rod upper end of first cylinder 24 is connected with middle mould 2 lower surfaces, middle mould baffle plate 25 is fixed positioned on the mould bases 5 of middle mould 2 below setpoint distances, when first cylinder, 24 piston rods move upward under gas pressure, middle mould 2 also moves upward, can insert the material powder in the concave groove 21 of middle mould this moment, in upper punch 1 presses down during mould 2, middle mould 2 also moves downward, after middle mould 2 moves downward middle mould desired location, mould baffle plate 25 during middle mould 2 lower ends only peak at, can't move downward, upper punch 1 dashes 3 with next at this moment again, following two punch 4 is finished the powder compacting jointly.
The structure that the axial slidably setpoint distance radial stop in following two punch 4 lower ends of described mould is positioned on the mould bases 5 is: be provided with at least one second cylinder 41 and following two punch baffle plate 42, the cylinder body lower end of this second cylinder 41 is fixedly arranged on the mould bases 5, the piston rod upper end of this second cylinder 41 is fixed positioned in following two punch 4 lower ends, following two punch baffle plate 42 is fixed positioned on the mould bases 5 of following two punch 4 below setpoint distances, when upper punch 1 to when motion, when the piston rod of second cylinder 41 of following two punch 4 moves downward the following two punch desired location under pressure, following two punch 4 lower ends only peak at following two punch baffle plate 42, can't move downward, upper punch 1 is finished powder jointly with following two punch 4 and is suppressed compacting size and the density that guarantees the product center pillar at this moment again.
The quantity of second cylinder 41 of described mould is two, is symmetrically distributed in following two punch 4 both sides, so just guarantees following two punch 4 stress balances, and it is crooked to prevent that following two punch 4 from taking place, and effectively guarantees the size and the density accuracy of compacting center pillar.
The middle mould baffle plate 25 of described mould and following two punch baffle plate 42 lower ends are equipped with the external screw thread 63 of preseting length, be provided with first gear 61 and second gear 62, first gear 61 is provided with internal thread, the middle mould baffle plate 25 and the external screw thread 63 of following two punch baffle plate 42 lower ends and the internal thread activity of first gear 61 are connected with a joggle, first gear 61 and the engagement of second gear, 62 teeth, second gear 62 is fixed positioned on the mould bases 5, like this as long as regulate second gear, 62 rotational angles, second gear 62 just drives first gear 61 by engagement and rotates, mould baffle plate 25 and following two punch baffle plate 42 moved up and down during first gear 61 rotated and just drives, thereby play the fine setting effect that centering mould 2 and following two punch 4 move downward the position, further guaranteed the size precision of product.
Claims (5)
1. mould for molding magnetic core of soft ferrite, it is characterized in that: comprise upper punch (1), middle mould (2), next dashes (3), following two punch (4) and mould bases (5), to use direction to be benchmark, in mould (2) axially slidably the setpoint distance radial stop be positioned on the mould bases (5), middle mould (2) upside is provided with shaping groove (21), should be respectively equipped with next punching (22) and following two punch hole (23) by middle mould (2) downside, this next punching (22) and following two punch hole (23) upper end are communicated with the shaping groove (21) of middle mould (2), next dashes (3) lower end and is fixedly arranged on the mould bases (5), next dashes (3) top axial and slidably is inserted in next punching (22) of middle mould, following two punch (4) lower end axially slidably the setpoint distance radial stop be positioned on the mould bases (5), in the following two punch hole (23) of mould, upper punch (1) lower end axially slidably was inserted in the shaping groove (21) of middle mould upside during following two punch (4) top axial slidably was inserted in.
2. a kind of mould as claimed in claim 1, it is characterized in that: middle mould (2) axially slidably the structure that is positioned on the mould bases (5) of setpoint distance radial stop be: be provided with first cylinder (24) and a middle mould baffle plate (25), the cylinder body lower end of this first cylinder (24) is fixedly arranged on the mould bases (5), the piston rod upper end of first cylinder (24) is connected with middle mould (2) lower surface, and middle mould baffle plate (25) is fixed positioned on the mould bases (5) of middle mould (2) below setpoint distance.
3. a kind of mould as claimed in claim 1, it is characterized in that: following two punch (4) lower end axially slidably the structure that is positioned on the mould bases (5) of setpoint distance radial stop be: be provided with at least one second cylinder (41) and following two punch baffle plate (42), the cylinder body lower end of this second cylinder (41) is fixedly arranged on the mould bases (5), the piston rod upper end of this second cylinder (41) is fixed positioned in following two punch (4) lower end, and following two punch baffle plate (42) is fixed positioned on the mould bases (5) of following two punch (4) below setpoint distance.
4. a kind of mould as claimed in claim 3 is characterized in that: the quantity of second cylinder (41) is two, is symmetrically distributed in following two punch (4) both sides.
5. as claim 2 or 3 described a kind of moulds, it is characterized in that: middle mould baffle plate (25) and following two punch baffle plate (42) lower end are equipped with the external screw thread (63) of preseting length, be provided with first gear (61) and second gear (62), first gear (61) is provided with internal thread, the external screw thread (63) of middle mould baffle plate (25) and following two punch baffle plate (42) lower end is connected with a joggle with the internal thread activity of first gear (61), first gear (61) and the engagement of second gear (62) tooth, second gear (62) is fixed positioned on the mould bases (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100318757A CN101930839A (en) | 2009-06-25 | 2009-06-25 | Mould for molding magnetic core of soft ferrite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100318757A CN101930839A (en) | 2009-06-25 | 2009-06-25 | Mould for molding magnetic core of soft ferrite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101930839A true CN101930839A (en) | 2010-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100318757A Pending CN101930839A (en) | 2009-06-25 | 2009-06-25 | Mould for molding magnetic core of soft ferrite |
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| Country | Link |
|---|---|
| CN (1) | CN101930839A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102151831A (en) * | 2011-03-17 | 2011-08-17 | 越峰电子（昆山）有限公司 | Improved magnetic core forming die |
| CN111933438A (en) * | 2020-06-16 | 2020-11-13 | 海宁市康明电子有限公司 | Machining die and machining method for magnetic core with hole capable of being axially opened |
-
2009
- 2009-06-25 CN CN2009100318757A patent/CN101930839A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102151831A (en) * | 2011-03-17 | 2011-08-17 | 越峰电子（昆山）有限公司 | Improved magnetic core forming die |
| CN111933438A (en) * | 2020-06-16 | 2020-11-13 | 海宁市康明电子有限公司 | Machining die and machining method for magnetic core with hole capable of being axially opened |
| CN111933438B (en) * | 2020-06-16 | 2021-10-22 | 海宁市康明电子有限公司 | Machining die and machining method for magnetic core with hole capable of being axially opened |
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Application publication date: 20101229 |