CN104934227A - Tantalum core making technology of high-temperature all-tantalum capacitor - Google Patents
Tantalum core making technology of high-temperature all-tantalum capacitor Download PDFInfo
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- CN104934227A CN104934227A CN201510404554.2A CN201510404554A CN104934227A CN 104934227 A CN104934227 A CN 104934227A CN 201510404554 A CN201510404554 A CN 201510404554A CN 104934227 A CN104934227 A CN 104934227A
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Abstract
A tantalum core making technology of a high-temperature all-tantalum capacitor belongs to the capacitor field. The invention aims at solving a problem existing in an existing making technology of the tantalum core of the high-temperature all-tantalum capacitor. The making technology has two technical schemes. The first technical scheme has the following steps: step1, selecting a tantalum core forming mould, wherein a lower terrace die of the forming mould adopts a convex mould of a circumference edge 45 degree embossment chamfer; step2, using alcohol demoulding molding to make a tantalum-core rough blank; step3, making a hook on an upper end of a tantalum wire of the made tantalum-core rough blank so as to be hung on a tantalum wire mesh and carrying out suspension sintering in a tantalum tube so as to make the tantalum core. The second technical scheme comprises the steps: step1, selecting the tantalum core forming mould, wherein the lower terrace die of the forming mould adopts the convex mould of the circumference edge 45 degree embossment chamfer; step2, using alcohol demoulding molding to make the tantalum-core rough blank; step3, placing the made tantalum-core rough blank on a tantalum disc and carrying out suspension sintering in a tantalum tube so as to make the tantalum core.
Description
Technical field
The present invention relates to a kind of tantalum core manufacture method, belong to capacitor area.
Background technology
High temperature whole tantalum capacitor is due to its excellent heat resistance, used fully in oil drilling industry, Fig. 1 provides a kind of conventional structure of high temperature whole tantalum capacitor, comprise tantalum core 1, tantalum shell 2, tantalum ring 3, pad 4, sealing ring 5, sealing gasket 6, insulator 7, underlay 8, electrolyte 9. positive wire 10, negative wire 11, positive wire solder joint 12 and negative wire solder joint 13.Tantalum core 1, to closely cooperate between underlay 8 and tantalum ring 3; Tantalum shell 2, tantalum core 1, closely cooperating between pad 4 and sealing gasket 6, by adjusting the size of pad 4, making to coordinate closely between structural member; Tantalum core 1 and tantalum ring 3 gap are about 0.4mm.Making high temperature whole tantalum capacitor vitals is tantalum core, and the whether excellent quality height determining high temperature whole tantalum capacitor of the quality of tantalum core, therefore, the manufacture craft of tantalum core is subject to people's attention.
Existing tantalum core is shaping is probably divided into two kinds of modes to carry out the demoulding: 1. not mixed powder is shaping: tantalum powder is not mixed into any impurity, and direct pressing is shaping.The method can not introduce impurity, pollutes tantalum core, but owing to not lubricating, frictional force is large, and when the demoulding, tantalum powder particles tilts along Impact direction, and surface pore is reduced; 2. adhesive is mixed into shaping: tantalum powder is mixed into the solid adhesive such as stearic acid or camphor, and then compressing.Solid adhesive can well play lubrication, good retention surface hole, but the more difficult eliminating of the adhesive be mixed into, during sintering, its residual carbon can react with tantalum, pollutes tantalum core.
The edge of the mould of existing tantalum core is right angle, the right-angle side that shaping tantalum core is sharp keen can scratch the edge of underlay, can there is space when the tantalum core of right-angle side coordinates with underlay, can not closely cooperate with structural mat to cause the vibration ability of bearing of high temperature whole tantalum capacitor to decline, and quality reduces.
In sintering high temperature thermostatic process, tantalum powder particles can mutual melting, after cooling, and reduction in bulk.The mode that existing tantalum core adopts when sintering is placed on tantalum dish carries out, by bottom gravity and tantalum core with the impact of sintering tantalum dish adhesion, tantalum powder can be formed bottom tantalum core pile up, bottom is shunk hardly, as shown in Figure 2, the tantalum core made there will be deformation of bottom, coordinates not tight with underlay, do not utilize installation, the high temperature whole tantalum capacitor quality made is low.
If be elongated shape for the tantalum core made, being so placed in sintering tantalum dish can flexural deformation.Because the impossible density in the every position of tantalum core is completely the same, therefore tantalum core is when shrinking, and all directions are shunk size and be there are differences.Elongated tantalum core length direction shrinks absolute value and becomes large, can bend, as shown in Figure 3 in tantalum core contraction process.The tantalum core made like this cannot use.
Summary of the invention
The present invention seeks to the existing manufacture craft Problems existing of the tantalum core in order to solve high temperature whole tantalum capacitor, providing a kind of tantalum core production process of high temperature whole tantalum capacitor.
The tantalum core production process of high temperature whole tantalum capacitor of the present invention has two technical schemes.
First technical scheme, the tantalum core production process of described high temperature whole tantalum capacitor comprises the following steps:
Step one, selection tantalum core mould, the lower punch of this mould adopts the convex mold of circumferential edges 45 ° of protruding chamferings;
Step 2, employing alcohol stripping forming make tantalum core crude green body;
Step 3, crotch is made in the tantalum wire upper end of the tantalum core crude green body made, hang over tantalum wire online, and be placed in tantalum cylinder and carry out suspensions and sinter, make tantalum core.
Second technical scheme: the tantalum core production process of described high temperature whole tantalum capacitor comprises the following steps:
Step one, selection tantalum core mould, the lower punch of this mould adopts the convex mold of circumferential edges 45 ° of protruding chamferings;
Step 2, employing alcohol stripping forming make tantalum core crude green body;
Step 3, the tantalum core crude green body made to be placed on tantalum dish, and to be placed in tantalum cylinder and to sinter, make tantalum core.
Advantage of the present invention: the tantalum core adopting the tantalum core production process of high temperature whole tantalum capacitor of the present invention to make is superior in quality, the demoulding of tantalum core shaping employing alcohol.Not only fully retain tantalum core outer surface hole, avoid introducing too much impurity simultaneously; Mould lower punch band 45 ° of chamferings.Solve tantalum core sintering lower end and pile up problem on deformation; Hang sintering.Solve elongated tantalum core, irregular deformation problems.
Accompanying drawing explanation
Fig. 1 is the structural representation of conventional high temperature whole tantalum capacitor;
Fig. 2 and Fig. 3 is the deformation principle schematic diagram that the existing sintering process of tantalum core exists;
Fig. 4 is the principle schematic of the tantalum core production process of high temperature whole tantalum capacitor of the present invention; In figure, the name of Reference numeral is called: 101, tantalum wire, 102, tantalum cylinder, 103, tantalum dish, 104, tantalum core;
Fig. 5 is the end view of Fig. 4.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 4 and Fig. 5, the tantalum core production process of high temperature whole tantalum capacitor described in present embodiment, this technique comprises the following steps:
Step one, selection tantalum core mould, the lower punch of this mould adopts the convex mold of circumferential edges 45 ° of protruding chamferings;
Step 2, employing alcohol stripping forming make tantalum core crude green body;
Step 3, crotch is made in the tantalum wire upper end of the tantalum core crude green body made, hang over tantalum wire online, and be placed in tantalum cylinder and carry out suspensions and sinter, make tantalum core.
The protruding chamfering that mould lower punch circumferential edge marginal zone 0.5mm is wide, make shaping tantalum core lower end produce chamfering, the chamfering of tantalum core bottom: for redundancy is vacated in the irregular deformation in bottom, makes tantalum core base diameter be less than or equal to integral diameter all the time.Can according to tantalum core size and the situation of contraction adjustment mould chamfering.The defect that the bottom shown in Fig. 2 is piled up just is overcome during such sintering.
The process adopting alcohol stripping forming to make tantalum core crude green body in step 2 is: after tantalum powder loads the die cavity of tantalum core mould, instillation straight alcohol, and the whole tantalum powder of submergence is then compressing. the tantalum core after shaping air-dry 1 hour in ventilation, make tantalum core crude green body.The alcohol demoulding not only plays lubrication, can effective retention surface hole, and is easy to get rid of, and does not almost remain, avoids polluting tantalum core.
Hanging sintering makes tantalum core receive outside pulling force instead of inside compression stress, and the contraction of length direction obviously reduces, and when compact density is larger, does not even shrink.
Embodiment two: present embodiment is described further execution mode one, in step one, the chamfering of the circumferential edges of lower punch is 30 ° ~ 50 °.
Embodiment three: present embodiment is described further execution mode one, in step one, the chamfering of the circumferential edges of lower punch is 45 °.
The angle of present embodiment is applicable to majority of case.
Embodiment four: the tantalum core production process of high temperature whole tantalum capacitor described in present embodiment, this technique comprises the following steps:
Step one, selection tantalum core mould, the lower punch of this mould adopts the convex mold of circumferential edges 45 ° of protruding chamferings;
Step 2, employing alcohol stripping forming make tantalum core crude green body;
Step 3, the tantalum core crude green body made to be placed on tantalum dish, and to be placed in tantalum cylinder and to sinter, make tantalum core.
The protruding chamfering that mould lower punch circumferential edge marginal zone 0.5mm is wide, make shaping tantalum core lower end produce chamfering, the chamfering of tantalum core bottom: for redundancy is vacated in the irregular deformation in bottom, makes tantalum core base diameter be less than or equal to integral diameter all the time.Can according to tantalum core size and the situation of contraction adjustment mould chamfering.The defect that the bottom shown in Fig. 2 is piled up just is overcome during such sintering.
The process adopting alcohol stripping forming to make tantalum core crude green body in step 2 is: after tantalum powder loads the die cavity of tantalum core mould, instillation straight alcohol, and the whole tantalum powder of submergence is then compressing. the tantalum core after shaping air-dry 1 hour in ventilation, make tantalum core crude green body.
Embodiment five: present embodiment is described further execution mode four, in step one, the chamfering of the circumferential edges of lower punch is 30 ° ~ 50 °.
Embodiment six: present embodiment is described further execution mode four, in step one, the chamfering of the circumferential edges of lower punch is 45 °.
Claims (8)
1. the tantalum core production process of high temperature whole tantalum capacitor, is characterized in that, this technique comprises the following steps:
Step one, selection tantalum core mould, the lower punch of this mould adopts circumferential edges to have the convex mold of protruding chamfering;
Step 2, employing alcohol stripping forming make tantalum core crude green body;
Step 3, crotch is made in the tantalum wire upper end of the tantalum core crude green body made, hang over tantalum wire online, and be placed in tantalum cylinder and carry out suspensions and sinter, make tantalum core.
2. the tantalum core production process of high temperature whole tantalum capacitor according to claim 1, it is characterized in that, the process adopting alcohol stripping forming to make tantalum core crude green body in step 2 is: after tantalum powder loads the die cavity of tantalum core mould, instillation straight alcohol, the whole tantalum powder of submergence, then compressing. the tantalum core after shaping air-dry 1 hour in ventilation, make tantalum core crude green body.
3. the tantalum core production process of high temperature whole tantalum capacitor according to claim 1, it is characterized in that, in step one, the chamfering of the circumferential edges of lower punch is 30 ° ~ 50 °.
4. the tantalum core production process of high temperature whole tantalum capacitor according to claim 1, it is characterized in that, in step one, the chamfering of the circumferential edges of lower punch is 45 °.
5. the tantalum core production process of high temperature whole tantalum capacitor, is characterized in that, this technique comprises the following steps:
Step one, selection tantalum core mould, the lower punch of this mould adopts the convex mold of circumferential edges 45 ° of protruding chamferings;
Step 2, employing alcohol stripping forming make tantalum core crude green body;
Step 3, the tantalum core crude green body made to be placed on tantalum dish, and to be placed in tantalum cylinder and to sinter, make tantalum core.
6. the tantalum core production process of high temperature whole tantalum capacitor according to claim 5, it is characterized in that, the process adopting alcohol stripping forming to make tantalum core crude green body in step 2 is: after tantalum powder loads the die cavity of tantalum core mould, instillation straight alcohol, the whole tantalum powder of submergence, then compressing. the tantalum core after shaping air-dry 1 hour in ventilation, make tantalum core crude green body.
7. the tantalum core production process of high temperature whole tantalum capacitor according to claim 5, it is characterized in that, in step one, the chamfering of the circumferential edges of lower punch is 30 ° ~ 50 °.
8. the tantalum core production process of high temperature whole tantalum capacitor according to claim 5, it is characterized in that, in step one, the chamfering of the circumferential edges of lower punch is 45 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510404554.2A CN104934227A (en) | 2015-07-10 | 2015-07-10 | Tantalum core making technology of high-temperature all-tantalum capacitor |
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| CN201510404554.2A CN104934227A (en) | 2015-07-10 | 2015-07-10 | Tantalum core making technology of high-temperature all-tantalum capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110000379A (en) * | 2019-03-06 | 2019-07-12 | 长春维鸿东光电子器材有限公司 | The tantalum core production process of high temperature whole tantalum capacitor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07130582A (en) * | 1993-11-01 | 1995-05-19 | Haimeka Kk | Manufacture of tantalum anode |
| CN202461320U (en) * | 2012-03-27 | 2012-10-03 | 株洲市日升电子科技有限公司 | Square container mould for tantalum products |
| CN203109230U (en) * | 2012-12-25 | 2013-08-07 | 江苏峰峰钨钼制品股份有限公司 | Isostatic pressing molybdenum bar forming equipment of flexible mold |
| CN203459681U (en) * | 2013-08-22 | 2014-03-05 | 长春维鸿东光电子器材有限公司 | Multi-core combination forming mold |
| CN103920880A (en) * | 2014-03-11 | 2014-07-16 | 宁夏东方钽业股份有限公司 | Production method for tantalum and tantalum alloy bars |
-
2015
- 2015-07-10 CN CN201510404554.2A patent/CN104934227A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07130582A (en) * | 1993-11-01 | 1995-05-19 | Haimeka Kk | Manufacture of tantalum anode |
| CN202461320U (en) * | 2012-03-27 | 2012-10-03 | 株洲市日升电子科技有限公司 | Square container mould for tantalum products |
| CN203109230U (en) * | 2012-12-25 | 2013-08-07 | 江苏峰峰钨钼制品股份有限公司 | Isostatic pressing molybdenum bar forming equipment of flexible mold |
| CN203459681U (en) * | 2013-08-22 | 2014-03-05 | 长春维鸿东光电子器材有限公司 | Multi-core combination forming mold |
| CN103920880A (en) * | 2014-03-11 | 2014-07-16 | 宁夏东方钽业股份有限公司 | Production method for tantalum and tantalum alloy bars |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110000379A (en) * | 2019-03-06 | 2019-07-12 | 长春维鸿东光电子器材有限公司 | The tantalum core production process of high temperature whole tantalum capacitor |
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Application publication date: 20150923 |