CN202067782U - Mould used for metal casing sintering - Google Patents
Mould used for metal casing sintering Download PDFInfo
- Publication number
- CN202067782U CN202067782U CN2011201321675U CN201120132167U CN202067782U CN 202067782 U CN202067782 U CN 202067782U CN 2011201321675 U CN2011201321675 U CN 2011201321675U CN 201120132167 U CN201120132167 U CN 201120132167U CN 202067782 U CN202067782 U CN 202067782U
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- Prior art keywords
- mould
- sintering
- metal shell
- graphite
- expansion
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Abstract
The utility model discloses a combined mould used for metal casing sintering. The mould comprises a mould basal body with an expansion coefficient being the same as or approximating to the expansion coefficient of a metal casing, and also comprises a graphite positioning head arranged on the mould basal body. The mould employs materials with approximate expansion coefficients, thereby making the mould and the casing expend with heat and contract with cold synchronously and solving common problems.
Description
Technical field
The utility model relates to the encapsulation field of a kind of electronics and photoelectron product, particularly a kind of metal shell sintering mould.
Background technology
In the manufacture process of metal shell, the sintering of metal shell is most important one procedure, and so-called sintering is exactly that glass by fusion is sintered into one metal lead wire and metal shell housing and becomes complete metal shell.In order to make case body and lead-in wire still can remain on the origin-location when the glass high-temperature fusion, just need to use graphite jig.Graphite can tolerate very high temperature in protective atmosphere, also do not soak into other material production when high temperature simultaneously, therefore, just becomes comparatively ideal mold materials at the occasion graphite of high temperature sintering and high-temperature soldering.
Also there are some defectives in graphite except that above-mentioned advantage, one of them promptly is that the coefficient of expansion of graphite is very little, and this characteristic can be brought adverse influence on the contrary in the sintering process of metal shell.Metal shell can be because of thermal expansion produces thermal stress in sintering process, and the existence of these stress has adverse effect to the performance of shell.The stress relevant with material is mainly from two aspects, and one is that the coefficient of expansion of glass and metal shell case material does not match, and another is that the coefficient of expansion of mould and case body material does not match.First factor generally adopts selects the suitable glass insulator of the coefficient of expansion, promptly adopts the technology of matched seal to solve.Second factor so will solve comparatively difficulty of this class stress fully, generally can only reduce its influence from the angle of mold design because there is not the graphite material of the different coefficients of expansion available as far as possible, and this influence is more obvious when shell sizes is big.This influence generally shows as the eccentric of glass crack, lead-in wire and lead-in wire bending or the like behind the product sintering.
Produce the main cause of this thermal stress, material expands with heat and contract with cold when being the high temperature furnace sintering.Graphite jig can think that mould does not produce change in size substantially because the coefficient of expansion is very little, and metal shell is because the coefficient of expansion is more much bigger than graphite, and the expansion ratio graphite jig of its overall dimension is many greatly.The product hole on the housing when mounted is corresponding one by one and concentric with the hole on the mould, so also all still be in the center of housing bore after lead-in wire inserts.During intensification, mould does not expand substantially and housing will raise with temperature and expand.At this moment the hole on the metal shell has produced displacement with respect to graphite jig, because lead-in wire is fixed in the graphite jig hole and can produce displacement, no longer occupy the center of housing bore so lead-in wire has also produced displacement with respect to housing, promptly lead-in wire has produced eccentric phenomena.Cooling stage in sintering process, because solidifying of glass, lead-in wire has been sintered into one with housing, lead-in wire does not have cured yet and can change again with respect to the eccentric state of housing bore, along with temperature reduces, housing shrinks, and can not move in the hole of being fixed in graphite jig that goes between again, and just certainly will cause the bending of lead-in wire and the cracking of glass if housing continuation is at this moment shunk.
Use composite die utility model of the present utility model to address this problem preferably.When using the composite die sintering, because the case material of the basis material of composite die and metal shell is identical or used the approaching material of the coefficient of expansion, mould and shell expand with heat and contract with cold synchronously when sintering, above-mentioned quality problems after solidifying, glass cools can not produce thermal stress between them, so just can be readily solved.In addition, because the contact position of lead-in wire, housing, glass insulator and mould is still the graphite material of inlaying, so also can not produce any adverse effect.
Summary of the invention
Goal of the invention: technical problem to be solved in the utility model is at the deficiency of existing simple graphite jig, and a kind of composite die that can solve metal shell sintering quality problem is provided.
Technical scheme: technical scheme: metal shell sintering composite die described in the utility model comprises the die matrix identical or approaching with the metal shell coefficient of expansion and be provided with the graphite positioning head on this die matrix.
Described graphite positioning head is communicated with described die matrix.
Beneficial effect: the utility model compared with prior art, its remarkable advantage is: adopt the approaching material of the coefficient of expansion, make mould and shell expand with heat and contract with cold synchronously.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
As described in Figure 1, the utility model comprises the die matrix 1 identical or approaching with the metal shell coefficient of expansion and be provided with graphite positioning head 2 on this die matrix 1; Described graphite positioning head 2 is communicated with described die matrix 1; Hole on die matrix 1 by designing requirement, the position dimension in hole and the hole on the housing are consistent; The graphite positioning head of inlaying in the hole 2, its overall dimension just in time can be inlayed in the hole of progressive die tool matrix 1; The string upper glass insulator that will go between successively during installation inserts in the aperture of graphite positioning head 2 of composite die 1, case body is loaded onto to get final product again.The utility model adopts the approaching material of the coefficient of expansion, makes mould and shell expand with heat and contract with cold synchronously, the FAQs before having solved.
Claims (2)
1. metal shell sintering mould is characterized in that: the die matrix identical or approaching with the metal shell coefficient of expansion (1) and be provided with graphite positioning head (2) on this die matrix (1).
2. metal shell sintering mould according to claim 1 is characterized in that: described graphite positioning head (2) is communicated with described die matrix (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201321675U CN202067782U (en) | 2011-04-29 | 2011-04-29 | Mould used for metal casing sintering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201321675U CN202067782U (en) | 2011-04-29 | 2011-04-29 | Mould used for metal casing sintering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202067782U true CN202067782U (en) | 2011-12-07 |
Family
ID=45061637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201321675U Expired - Fee Related CN202067782U (en) | 2011-04-29 | 2011-04-29 | Mould used for metal casing sintering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202067782U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760663A (en) * | 2011-04-29 | 2012-10-31 | 宜兴市吉泰电子有限公司 | Mould for sintering metallic packaging shell |
-
2011
- 2011-04-29 CN CN2011201321675U patent/CN202067782U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760663A (en) * | 2011-04-29 | 2012-10-31 | 宜兴市吉泰电子有限公司 | Mould for sintering metallic packaging shell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20180429 |