CN113345705A - Manufacturing process of inductance element with high manufacturing efficiency - Google Patents
Manufacturing process of inductance element with high manufacturing efficiency Download PDFInfo
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- CN113345705A CN113345705A CN202110597531.3A CN202110597531A CN113345705A CN 113345705 A CN113345705 A CN 113345705A CN 202110597531 A CN202110597531 A CN 202110597531A CN 113345705 A CN113345705 A CN 113345705A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
Abstract
The invention discloses a manufacturing process of an inductance element with high manufacturing efficiency, which comprises the steps of firstly forming a powder block base in a die to form a limiting and positioning structure for a coil placing position; then the coil is placed on the powder block base, the middle powder block body is formed in the die through secondary powder forming, the position of the coil is completely fixed, then the lead part of the coil is directly bent and formed in the die to form a contact terminal part, and finally the lead part which is bent and attached to the upper surface of the middle powder block body is buried through hot-pressing powder forming, and only the contact terminal part is exposed. The invention can bend the pins when the inductor is pressed, shorten the manufacturing process of the inductor, accurately control the relative position of the coil and the thickness size of the upper powder and the lower powder, provide precondition for the thickness control of the external dimension of the inductor and the neutrality of the coil, and realize the electrical property improvement and the dimensional stability of the inductor; the problem of inductance product sheet cost height, processing procedure length and coil skew in inside when compression moulding is solved.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of inductance element production, and particularly relates to a manufacturing process of an inductance element with high manufacturing efficiency.
[ background of the invention ]
The inductor is a commonly used electronic component, is widely applied to electronic products, and has a very large demand. The manufacturing process of the inductor comprises the steps of wire pressing and winding, paint stripping, cutting, tin dipping, welding, powder forming, bending and the like. The inductor component product is generally pressed and formed by filling powder to cover the coil. In the prior art, most of the inductor powder is filled into the mold cavity by adopting natural flow and is randomly filled into the mold cavity, and then the coil with the frame is placed. With the miniaturization of electronic components, the powder filling mode in the prior art is not easy to control the deflection of the coil after pressing, and the inductance characteristic and stability are influenced.
Therefore, it is necessary to provide a new process for manufacturing an inductor device with high process efficiency to solve the above-mentioned problems.
[ summary of the invention ]
The invention mainly aims to provide a manufacturing process of an inductance element with high manufacturing efficiency, which solves the problems of high cost and long manufacturing process of inductance product sheets and deflection and deviation of coils inside during compression molding.
The invention realizes the purpose through the following technical scheme: a manufacturing process of an inductance element with high manufacturing efficiency comprises the following steps:
s1) powder is molded in a die at one time to form a powder block base; the powder block base comprises a plate body, a groove is formed in the upper surface of the plate body, and a positioning column protruding upwards is arranged in the middle of the groove;
s2) placing the wound hollow coil into the groove and sleeving the positioning column; the coil comprises a coil body and a lead part extending out, wherein the lead part extends out from the upper part of the coil body in the same horizontal direction;
s3) powder-forming a middle powder block body in the die, wherein the middle powder block body and the powder block base form an integral powder filling body, the powder filling body wraps the coil body, and the lead part horizontally extends out of one side surface of the powder filling body;
s4) cold pressing is carried out in the die to horizontally bend the lead part into a vertical state;
s5) bending the lead part from a vertical state to a horizontal state in the mould, attaching the lead part to the upper surface of the powder filling body, and flattening the end part of the lead part to form a contact terminal part to obtain a semi-finished product;
s6) taking the semi-finished product in the step 5) out of the die, putting the semi-finished product into a hot-pressing die, and forming an upper powder block body which is integrated with the powder filling body into a whole through hot-pressing powder forming to obtain the inductance element.
Furthermore, the thickness of the powder between the bottom of the groove and the lower surface of the plate body is consistent with the design requirement.
Furthermore, a supporting platform for supporting the lead part is arranged in the die.
Furthermore, a corner notch corresponding to the lead part is formed at the upper corner of the powder filling body.
Furthermore, the upper powder block body fills the corner gap to form a block structure with the powder filling body, the free end of the lead part is buried and shielded, and the contact terminal part is exposed on the upper surface of the upper powder block body.
Further, the powder block base, the middle powder block body and the upper powder block body are powder blocks with fixed shapes formed by pressing one or more soft magnetic powders through mixing non-magnetic materials.
Further, the soft magnetic powder is selected from one or more of Fe-si, Fe-AL and FesiGr; the nonmagnetic material is resin.
Further, the outer contour of the plate body is circular, elliptical, rectangular or polygonal.
Further, the shape of the groove is circular, oval, rectangular or polygonal.
Further, the groove is profiled with the outer contour of the coil; the outer diameter of the positioning column is in profile modeling with the through hole in the coil body.
Compared with the prior art, the manufacturing process of the inductance element with high manufacturing efficiency has the beneficial effects that: the terminal pins can be bent during inductor pressing, so that the inductor manufacturing process is shortened, the relative position of the coil and the thickness sizes of upper powder and lower powder are accurately controlled, preconditions are provided for the thickness control of the overall dimension of the inductor and the neutrality of the coil, and the electrical property improvement and the dimensional stability of the inductor are realized; the problem of inductance product sheet cost height, processing procedure length and coil skew in inside when compression moulding is solved.
[ description of the drawings ]
FIG. 1 is a schematic structural diagram of a powder block base according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a structure of a coil placed in a powder block base according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a middle powder block formed by the embodiment of the present invention and a lead portion bent upward;
FIG. 4 is a schematic structural view of a contact terminal portion formed in an embodiment of the present invention, which is placed in a hot press mold;
FIG. 5 is a schematic structural diagram of an inductive element according to an embodiment of the present invention;
the figures in the drawings represent:
100 mould, 101 support platform; 200 hot-pressing the mould;
1, a powder block base, 11 plate bodies, 12 grooves and 13 positioning columns;
2 coil, 21 coil body, 22 lead part, 23 contact terminal part;
3 middle powder block;
4 powder filling body, 41 corner gap;
5 upper powder block.
[ detailed description ] embodiments
Example (b):
the embodiment is a manufacturing process of an inductance element with high manufacturing efficiency, which comprises the following steps:
s1) powder forming is carried out once in the die 100 to obtain a powder block base 1, as shown in figure 1; the powder block base 1 comprises a plate body 11, a groove 12 is formed in the upper surface of the plate body 11, and a positioning column 13 protruding upwards is arranged in the middle of the groove 12; the thickness of the powder between the bottom of the groove 12 and the lower surface of the plate body 11 is correspondingly consistent with the design requirement;
s2) placing the wound air-core coil 2 into the groove 12 and sleeving the positioning post 13, and fixing the position of the coil 2 by the positioning post 13, as shown in fig. 2; the coil 2 comprises a coil body 21 and a lead part 22 extending out, wherein the lead part 22 extends out from the upper part of the coil body 21 in the same horizontal direction; a supporting platform 101 for supporting the lead part 22 is arranged in the mold 100;
s3) performing secondary powder molding to form a middle powder block body 3 in the die 100, wherein the middle powder block body 3 and the powder block base 1 form an integral powder filling body 4, the coil body 21 is wrapped in the powder filling body 4, and the lead part 22 horizontally extends out of one side surface of the powder filling body 4; a corner notch 41 corresponding to the lead part 22 is formed at the upper corner of the powder filling body 4, and the corner notch 41 can provide a required avoiding space for the lead part 22 to bend, as shown in fig. 3;
s4) cold pressing the mold 100 to bend the lead part 22 from a horizontal state to a vertical state, as shown in fig. 3;
s5) bending the lead portion 22 from a vertical state to a horizontal state in the mold 100, and attaching the lead portion to the upper surface of the powder packing body 4 while flattening the end portion of the lead portion 22 to form the contact terminal portion 23, thereby obtaining a semi-finished product, as shown in fig. 4; the contact terminal portions 23 are pressed and partially embedded in the upper surface of the powder packing body 4;
the cold pressing one-time bending and bending foot forming steps in the steps S4 and S5 are completed in a single action in the die;
s6) taking the semi-finished product in the step 5) out of the mold 100, putting the semi-finished product into a hot-pressing mold 200, and performing hot-pressing powder molding for three times to form an upper powder block 5 integrated with the powder filling body 4 to obtain an inductance element; the upper powder block 5 fills the corner gap 41 and forms a block structure with the powder filling 4, and the free end of the lead part 22 is buried and shielded, and the contact terminal part 23 is exposed on the upper surface of the upper powder block 5, as shown in fig. 5.
The powder compact base 1, the middle powder compact 3, and the upper powder compact 5 are powder compacts having a fixed shape formed by mixing one or more soft magnetic powders and pressing them with a non-magnetic material. Wherein the soft magnetic powder is selected from one or more of Fe-si, Fe-AL and FesiGr; the nonmagnetic material is resin.
The outer contour of the plate body 11 may be circular, elliptical, rectangular, polygonal, etc. The shape of the groove 12 may be circular, elliptical, rectangular, polygonal, or the like.
The powder block base 1 is directly pressed and formed in the die 100, and a cold-pressed semi-finished product is formed after the coil 2 is placed, powder is filled, pressed and bent.
The groove 12 is profiled with the outer contour of the coil 2, thereby playing a role in limiting the periphery of the coil 2. The outer diameter of the positioning column 13 is profiled with the through hole in the coil body 21, so that the center position of the coil body 21 is accurately limited.
In the manufacturing process of the inductance element with high manufacturing efficiency, the powder block base is molded in the mold to form a limiting and positioning structure for the coil placing position, and the thickness of the powder cake at the bottom is ensured to meet the design requirement; the coil position deviation phenomenon during coil pressing can be effectively reduced, and the pins are bent in the die, so that the thickness and the size of the tiny inductor are significant for inductor products with tiny light and thin design requirements; then the coil is placed on the powder block base, the middle powder block body is formed in the die through secondary powder forming, the position of the coil is completely fixed, then the lead part of the coil is directly bent and formed in the die to form a contact terminal part, and finally the lead part bent and attached to the upper surface of the middle powder block body is embedded through hot-pressing powder forming, and only the contact terminal part is exposed, so that the manufacturing efficiency is greatly improved; the scheme has the advantages that the mode of pressing the bent pin by the positioning coil in the mould has the advantages of positioning the position of the coil and improving the induction quantity when the inductor is pressed, and has good effect on poor winding damage of a thin product; the scheme can bend the pins during inductor pressing to shorten the inductor manufacturing process and accurately control the relative position of the coil and the thickness size of the upper powder and the lower powder, provides precondition for the thickness control of the external dimension of the inductor and the neutrality of the coil, and realizes the electrical property improvement and the dimensional stability of the inductor; the problem of inductance product sheet cost height, processing procedure length and coil skew in inside when compression moulding is solved.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (10)
1. A manufacturing process of an inductance element with high manufacturing efficiency is characterized in that: which comprises the following steps:
s1) powder is molded in a die at one time to form a powder block base; the powder block base comprises a plate body, a groove is formed in the upper surface of the plate body, and a positioning column protruding upwards is arranged in the middle of the groove;
s2) placing the wound hollow coil into the groove and sleeving the positioning column; the coil comprises a coil body and a lead part extending out, wherein the lead part extends out from the upper part of the coil body in the same horizontal direction;
s3) powder-forming a middle powder block body in the die, wherein the middle powder block body and the powder block base form an integral powder filling body, the powder filling body wraps the coil body, and the lead part horizontally extends out of one side surface of the powder filling body;
s4) cold pressing is carried out in the die to horizontally bend the lead part into a vertical state;
s5) bending the lead part from a vertical state to a horizontal state in the mould, attaching the lead part to the upper surface of the powder filling body, and flattening the end part of the lead part to form a contact terminal part to obtain a semi-finished product;
s6) taking the semi-finished product in the step 5) out of the die, putting the semi-finished product into a hot-pressing die, and forming an upper powder block body which is integrated with the powder filling body into a whole through hot-pressing powder forming to obtain the inductance element.
2. The process for manufacturing an inductor device according to claim 1, further comprising: the thickness of the powder between the bottom of the groove and the lower surface of the plate body is consistent with the design requirement.
3. The process for manufacturing an inductor device according to claim 1, further comprising: and a supporting platform for supporting the lead part is arranged in the die.
4. The process for manufacturing an inductor device according to claim 1, further comprising: and a corner notch corresponding to the lead part is formed at the upper corner of the powder filling body.
5. The process for manufacturing an inductor device according to claim 4, further comprising: the upper powder block body fills the corner gap and forms a block structure with the powder filling body, the free end of the lead part is buried and shielded, and meanwhile, the contact terminal part is exposed on the upper surface of the upper powder block body.
6. The process for manufacturing an inductor device according to claim 1, further comprising: the powder block base, the middle powder block body and the upper powder block body are powder blocks which are formed by pressing one or more soft magnetic powder through mixing non-magnetic materials and have fixed shapes.
7. The process for manufacturing an inductor device according to claim 6, further comprising: the soft magnetic powder is selected from one or more of Fe-si, Fe-AL and FesiGr; the nonmagnetic material is resin.
8. The process for manufacturing an inductor device according to claim 1, further comprising: the outer contour shape of the plate body is round, oval, rectangular or polygonal.
9. The process for manufacturing an inductor device according to claim 1, further comprising: the shape of the groove is circular, oval, rectangular or polygonal.
10. The process for manufacturing an inductor device according to claim 1, further comprising: the groove is profiled with the outer contour of the coil; the outer diameter of the positioning column is in profile modeling with the through hole in the coil body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110597531.3A CN113345705B (en) | 2021-05-31 | 2021-05-31 | Manufacturing process of inductance element with high manufacturing efficiency |
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| CN202110597531.3A CN113345705B (en) | 2021-05-31 | 2021-05-31 | Manufacturing process of inductance element with high manufacturing efficiency |
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| CN113345705A true CN113345705A (en) | 2021-09-03 |
| CN113345705B CN113345705B (en) | 2023-01-24 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200428425A (en) * | 2003-06-03 | 2004-12-16 | Traben Co Ltd | Inductor element and manufacturing method thereof |
| CN104425121A (en) * | 2013-08-27 | 2015-03-18 | 三积瑞科技（苏州）有限公司 | Embedded alloy inductor fabrication method |
| CN105719787A (en) * | 2014-12-20 | 2016-06-29 | 东光株式会社 | Surface-mount inductor and method for manufacturing the same |
| CN110098042A (en) * | 2019-03-21 | 2019-08-06 | 深圳华络电子有限公司 | A kind of manufacture craft of midget inductor |
| CN111477425A (en) * | 2020-05-19 | 2020-07-31 | 昆山奥迪尔智能科技有限公司 | Pin embedded exposed inductance element capable of realizing microminiaturization |
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2021
- 2021-05-31 CN CN202110597531.3A patent/CN113345705B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200428425A (en) * | 2003-06-03 | 2004-12-16 | Traben Co Ltd | Inductor element and manufacturing method thereof |
| CN104425121A (en) * | 2013-08-27 | 2015-03-18 | 三积瑞科技（苏州）有限公司 | Embedded alloy inductor fabrication method |
| CN105719787A (en) * | 2014-12-20 | 2016-06-29 | 东光株式会社 | Surface-mount inductor and method for manufacturing the same |
| CN110098042A (en) * | 2019-03-21 | 2019-08-06 | 深圳华络电子有限公司 | A kind of manufacture craft of midget inductor |
| CN111477425A (en) * | 2020-05-19 | 2020-07-31 | 昆山奥迪尔智能科技有限公司 | Pin embedded exposed inductance element capable of realizing microminiaturization |
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| CN113345705B (en) | 2023-01-24 |
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