CN201061825Y - Seal structure of die-casting die for high-vacuum pressure diecasting - Google Patents
Seal structure of die-casting die for high-vacuum pressure diecasting Download PDFInfo
- Publication number
- CN201061825Y CN201061825Y CNU2007200853419U CN200720085341U CN201061825Y CN 201061825 Y CN201061825 Y CN 201061825Y CN U2007200853419 U CNU2007200853419 U CN U2007200853419U CN 200720085341 U CN200720085341 U CN 200720085341U CN 201061825 Y CN201061825 Y CN 201061825Y
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Abstract
The utility model relates to a sealing structure for a die which is used in high vacuum pressure casting, which is a sealing structure for a casting die which is used in high vacuum pressure casting, and is constituted by a moving die cleading (7), a moving die insert block (14), a moving die backing board (6), a backing board (4), a moving die bottom board (1), a top pole board (3), a top pole pressing board (2), a top pole (31), a stationary die cleading (8), a stationary die inserting block (13), a stationary die bottom board (10), a gating case (16), an injection chamber (20), and a punching head. The utility model is characterized in that one contacted face of the stationary die cleading (8) which is contacted with the moving die cleading (7) is provided with a third sealing groove (22) whose inside is provided with heat resistance rubber and is sealed, the inner side of the third sealing groove (22) on the stationary die cleading (8) is provided with a second buffering gas groove (23) which is communicated with a second air extraction passage (9) which is connected with vacuum system of the outside. The utility model has high vacuum degree in die cavities.
Description
Technical field
The utility model belongs to casting technology field, is specifically related to a kind of hermetically-sealed construction of high vacuum pressure mold and pattern for casting tool.
Background technology
Compression casting (abbreviation die casting) is to make liquid metal under the high pressure effect, with high speed filling mold cavity, and cooled and solidified and obtain a kind of forming technology of foundry goods under pressure.Because molten metal is with high velocity jet state filling die cavity, most of gas in the die cavity has little time to get rid of and can be rolled in the molten metal inevitably, finally retain in the foundry goods with form of pinholes, cause the mechanical property of die casting not high, can not carry out very dark machined, and can not heat-treat and weld.
Vacuum die-casting method is that the gas in the die cavity is extracted out, and molten metal is at vacuum state retrofilling die cavity, thereby the gas that is involved in is few, the mechanical property height of foundry goods.And evacuated die-casting process is the same with common pressure casting method, and is easy to operate, do not reduce production efficiency.One of key technology of evacuated die-casting process is the sealing of die casting die cavity, and the quality of mould sealing directly has influence on the quality of die casting.At present extensively the encapsulating method that adopts is to offer seal groove at the die joint of mould, in fill out encapsulant such as heat-resisting silicon rubber.But because other place of mould does not have fine and reliable sealing, gas leakage is local more, and therefore the vacuum in the mold cavity that is obtained is low, though the mechanical property of foundry goods increases after the die casting, but still can not heat-treat and follow-up welding processing.
Summary of the invention
The purpose of this utility model is to provide a kind of makes the high vacuum pressure that vacuum is high in the die cavity cast the hermetically-sealed construction of using compression mod.
For achieving the above object, the technical solution of the utility model is: the casting of a kind of high vacuum pressure is with the hermetically-sealed construction of compression mod, described high vacuum pressure casting with compression mod by dynamic model cage plate 7, moving die insert 14, dynamic model backing plate 6, cushion block 4, moving clamping plate 1; Push rod plate 3, push rod pressing plate 2, push rod 31, cover half cage plate 8, fixed die insert 13, fixed clamping plate 10, sprue bush 16, injection chamber 20, drift 18 are formed; It is characterized in that:
Adorn heat-resisting silicone rubber seal offering in the 3rd seal groove 22, the three seal grooves 22 with the one side of dynamic model cage plate 7 contacted cover half cage plates 8; The inboard of the 3rd seal groove 22 on cover half cage plate 8 is offered one second buffering air drain 23, the second buffering air drains 23 and second and is bled and 9 communicate, and second bleeds 9 is connected with the vacuum system in the external world.
Dynamic model backing plate 6 is provided with push rod sealing plate 28 near a side of moving clamping plate 1, push rod sealing plate 28 is provided with jogger hole, push rod 31 passes the jogger hole on the push rod sealing plate 28, offer the 4th seal groove 26 on the push rod sealing plate 28, the 4th seal groove 26 is positioned at the outside of jogger hole, adorns heat-resisting silicon rubber in the 4th seal groove 26; Heat-resisting silicone rubber O-ring 30 is housed on the push rod 31 between push rod sealing plate 28 and the dynamic model backing plate 6, and push rod sealing plate 28 is fixed in dynamic model backing plate 6 by nut 29.
Offer the 5th buffering air drain 27, the five buffering air drains 27 and first between push rod sealing plate 28 and the dynamic model backing plate 6 and bleed and 5 is connected, the first 5 connection vacuum systems of bleeding, the 5th cushions the inboard that air drain 27 is positioned at the 4th seal groove 26.
Offering the 3rd buffering air drain 24, the three buffering air drains 24 between dynamic model backing plate 6 and the dynamic model cage plate 7 connects first and bleeds and 5, the first bleed and 5 connect vacuum systems.
Offering first buffering air drain 11, the first buffering air drains 11 between fixed clamping plate 10 and the cover half cage plate 8 connects second and bleeds and 9, the second bleed and 9 connect vacuum systems.
The heat-resisting silicon rubber of dress sealing in annular second seal groove, 21, the second seal grooves 21 is offered in fixed clamping plate 10 outsides and injection chamber 20 contact positions, compresses sealing by injection chamber 20.
Offer on the drift 18 in 2 roads, first seal groove, 19, the first seal grooves 19 and adorn heat-resisting silicon rubber.
Hermetically-sealed construction of the present utility model adopts: set up a push rod sealing plate 28 that can be fixed on the dynamic model backing plate in the dynamic model backing plate back of compression mod, offer seal groove and buffering air drain on the push rod sealing plate 28; Between injection chamber and fixed clamping plate, drift and injection chamber inwall, offer seal groove, heat resistant joint ring all is housed in the seal groove, prevent that gas from entering die cavity; The buffering air drain is all offered in the inboard that is seal groove on the die joint between dynamic model backing plate and dynamic model cage plate, cover half backing plate and cover half cage plate, dynamic model cage plate and cover half cage plate; All buffering air drains all link to each other with extract system, when minimum gas is entered by the sealing ring leakage, can be taken away by the buffering air drain, and be unlikely to enter into mold cavity.After taking above-mentioned measure, all can make the vacuum height in the die cavity of compression mod, satisfy the requirement of high vacuum extrusion process.
The utility model can be applicable to the high vacuum casting forming, and acquisition can be heat-treated or the high-performance die casting of welding processing.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1-moving clamping plate, 2-push rod pressing plate, 3-push rod plate, 4-cushion block, 5-first bleeds, 6-dynamic model backing plate, 7-dynamic model cage plate, 8-cover half cage plate, 9-second bleeds, the 10-fixed clamping plate, the 11-first buffering air drain, 12-die cavity, 13-fixed die insert, the 14-moving die insert, 15-interface channel, 16-sprue bush, the 17-cast gate, 18-drift, 19-first seal groove, the 20-injection chamber, 21-second seal groove, 22-the 3rd seal groove, the 23-second buffering air drain, 24-the 3rd buffering air drain, 25-the 4th buffering air drain, 26-the 4th seal groove, 27-the 5th buffering air drain, 28-push rod sealing plate, the 29-bolt, the heat-resisting silicone rubber O-ring of 30-, 31-push rod.
The specific embodiment
As shown in Figure 1, a kind of high vacuum pressure casting hermetically-sealed construction of compression mod,
Described high vacuum pressure casting with compression mod by dynamic model cage plate 7, moving die insert 14, dynamic model backing plate 6, cushion block 4, moving clamping plate 1; Push rod plate 3, push rod pressing plate 2, push rod 31, cover half cage plate 8, fixed die insert 13, fixed clamping plate 10, sprue bush 16, injection chamber 20, drift 18 are formed; Be provided with cushion block 4 between moving clamping plate 1 and the dynamic model backing plate 6, be disposed with push rod pressing plate 2, push rod plate 3 by on the moving clamping plate 1 of dynamic model backing plate 6 one sides, one end of push rod 31 is fixedlyed connected with push rod plate 3, and the jogger hole that the other end of push rod 31 passes on the dynamic model backing plate 6 is fixedlyed connected with moving die insert 14; Be disposed with dynamic model cage plate 7, cover half cage plate 8 between dynamic model backing plate 6 and the fixed clamping plate 10, be respectively equipped with cavity in dynamic model cage plate 7, the cover half cage plate 8, moving die insert 14 is positioned at the cavity of dynamic model cage plate 7, fixed die insert 13 is positioned at the cavity of cover half cage plate 8, forms foundry goods die cavity 12 between moving die insert 14 and the fixed die insert 13; Cover half cage plate 8 and fixed clamping plate 10 are provided with sprue bush 16, and sprue bush 16 is communicated with die cavity 12 by interface channel 15; Fixed clamping plate 10 outsides are equipped with injection chamber 20, are through hole in the injection chamber 20, and the end in the injection chamber 20 is provided with drift 18, and the other end in the injection chamber 20 communicates with sprue bush 16, and injection chamber 20 is provided with cast gate 17, and cast gate 17 communicates with the through hole of injection chamber 20;
Molten metal is poured into by the cast gate on the injection chamber 20 17, and injection punch head 18 advances molten metal is pressed into die cavity 12 then; When cast finishes, when drift 18 advanced to position S2 by position S1, the inner die cavity of entire die was formed the system of a sealing, begin to vacuumize this moment (does not draw among the vacuum valve figure, it is to be extracted out by vacuum valve that die cavity 12 vacuumizes), the gas in the die cavity is extracted out fast, finish evacuated die-casting process.Therefore when evacuated die-casting process, air tight for guaranteeing between each mating surface and the moving surface, mould must enhanced leaktightness.The high vacuum seal measure that the utility model is taked is as follows:
1) adorns heat-resisting silicone rubber seal offering in the 3rd seal groove 22, the three seal grooves 22 with the one side of dynamic model cage plate 7 contacted cover half cage plates 8.When dynamic model cage plate 7 and cover half cage plate 8 matched moulds are adjacent to, compress caulking gum, seal.
2) inboard of the 3rd seal groove 22 on cover half cage plate 8 is offered one second buffering air drain 23, the second buffering air drains 23 and second and is bled and 9 communicate, and second bleeds 9 is connected with the vacuum system in the external world.The effect of the second buffering air drain 23 is, if there is gas to leak by the 3rd seal groove 22, then at first enter the second buffering air drain 23, cushion air drain 23 and second and bleed and 9 be connected because of second, so gas is directly bled by second and 9 is taken away, has prevented that effectively gas from entering mold cavity 12.
3) be provided with push rod sealing plate 28 in a side of dynamic model backing plate 6 close moving clamping plates 1, push rod sealing plate 28 is provided with jogger hole, push rod 31 passes the jogger hole on the push rod sealing plate 28, offer the 4th seal groove 26 on the push rod sealing plate 28, the 4th seal groove 26 is positioned at the outside of jogger hole, adorns heat-resisting silicon rubber in the 4th seal groove 26; Heat-resisting silicone rubber O-ring 30 is housed on the push rod 31 between push rod sealing plate 28 and the dynamic model backing plate 6, and whole push rod sealing plate 28 is fixed in dynamic model backing plate 6 by nut 29, compresses the heat-resisting silicon rubber in heat-resisting silicone rubber O-ring 30 and the 4th seal groove 26 simultaneously.
4) between push rod sealing plate 28 and dynamic model backing plate 6, offer the 5th buffering air drain 27, the five buffering air drains 27 and first and bleed and 5 is connected, the first 5 connection vacuum systems of bleeding, the 5th cushions the inboard that air drain 27 is positioned at the 4th seal groove 26.The effect of the 5th buffering air drain 27 is with the second buffering air drain 23.
5) offering the 3rd buffering air drain 24, the three buffering air drains 24 between dynamic model backing plate 6 and dynamic model cage plate 7 connects first and bleeds and 5, the first bleed and 5 connect vacuum systems.The effect of the 3rd buffering air drain 24 is identical with the second buffering air drain 23.
6) offering first buffering air drain 11, the first buffering air drains 11 between fixed clamping plate 10 and cover half cage plate 8 connects second and bleeds and 9, the second bleed and 9 connect vacuum systems.The effect of the first buffering air drain 11 is identical with the second buffering air drain 23.
7) offer the heat-resisting silicon rubber of dress sealing in annular second seal groove, 21, the second seal grooves 21 in fixed clamping plate 10 outsides and injection chamber 20 contact positions, compress sealing, can prevent that gas from entering die cavity by the slit between fixed clamping plate 10 and the injection chamber 20 by injection chamber 20.
8) on drift 18, offer 2 roads, first seal groove, 19, the first seal grooves 19 and adorn heat-resisting silicon rubber outward, when drift 18 moves to position S2,, prevent that gas from entering die cavity thus the clearance seal between injection chamber 20 and the drift 18.
By above-mentioned seal approach, can guarantee the vacuum height in the die cavity 12, fluctuating range is little.Vacuum energy stable maintenance is between 91KPa-96KPa during actual motion, and promptly the absolute pressure of gas has satisfied the requirement of high vacuum die casting at 5-10KPa in the die cavity.
The above is the detailed description of the utility model embodiment, be not to be used for limiting the utility model, all scopes of the present utility model should be as the criterion with the Patent right requirement scope, and the embodiment and the approximate construction of the spirit variation similar with it of all claims all should be contained in the utility model.
Claims (7)
1. high vacuum pressure casting is with the hermetically-sealed construction of compression mod, described high vacuum pressure casting with compression mod by dynamic model cage plate (7), moving die insert (14), dynamic model backing plate (6), cushion block (4), moving clamping plate (1); Push rod plate (3), push rod pressing plate (2), push rod (31), cover half cage plate (8), fixed die insert (13), fixed clamping plate (10), sprue bush (16), injection chamber (20), drift (18) are formed; It is characterized in that:
Offering the 3rd seal groove (22) with the one side of the contacted cover half cage plate of dynamic model cage plate (7) (8), the 3rd seal groove is adorned heat-resisting silicone rubber seal in (22); The inboard of the 3rd seal groove (22) on cover half cage plate (8), offer one second the buffering air drain (23), second the buffering air drain (23) with second bleed (9) communicate, second bleed (9) with the external world vacuum system be connected.
2. a kind of high vacuum pressure casting according to claim 1 hermetically-sealed construction of compression mod, it is characterized in that: dynamic model backing plate (6) is provided with push rod sealing plate (28) near a side of moving clamping plate (1), push rod sealing plate (28) is provided with jogger hole, push rod (31) passes the jogger hole on the push rod sealing plate (28), offer the 4th seal groove (26) on the push rod sealing plate (28), the 4th seal groove (26) is positioned at the outside of jogger hole, and the 4th seal groove is adorned heat-resisting silicon rubber in (26); On the push rod (31) between push rod sealing plate (28) and the dynamic model backing plate (6) heat-resisting silicone rubber O-ring (30) is housed, push rod sealing plate (28) is fixed in dynamic model backing plate (6) by nut (29).
3. a kind of high vacuum pressure casting according to claim 1 hermetically-sealed construction of compression mod, it is characterized in that: offer the 5th buffering air drain (27) between push rod sealing plate (28) and the dynamic model backing plate (6), the 5th the buffering air drain (27) and first bleed (5) be connected, first bleed (5) connect vacuum system, the 5th buffering air drain (27) is positioned at the inboard of the 4th seal groove (26).
4. a kind of high vacuum pressure casting according to claim 1 hermetically-sealed construction of compression mod, it is characterized in that: offer the 3rd buffering air drain (24) between dynamic model backing plate (6) and the dynamic model cage plate (7), the 3rd buffering air drain (24) connects first bleeds (5), first bleed (5) connect vacuum system.
5. a kind of high vacuum pressure casting according to claim 1 hermetically-sealed construction of compression mod, it is characterized in that: offer the first buffering air drain (11) between fixed clamping plate (10) and the cover half cage plate (8), the first buffering air drain (11) connects second bleeds (9), second bleed (9) connect vacuum system.
6. a kind of high vacuum pressure casting according to claim 1 hermetically-sealed construction of compression mod, it is characterized in that: annular second seal groove (21) is offered with injection chamber (20) contact position in fixed clamping plate (10) outside, the heat-resisting silicon rubber of dress sealing compresses sealing by injection chamber (20) in second seal groove (21).
7. a kind of high vacuum pressure casting according to claim 1 hermetically-sealed construction of compression mod, it is characterized in that: offer 2 roads, first seal grooves (19) on the drift (18), first seal groove is adorned heat-resisting silicon rubber in (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200853419U CN201061825Y (en) | 2007-06-21 | 2007-06-21 | Seal structure of die-casting die for high-vacuum pressure diecasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200853419U CN201061825Y (en) | 2007-06-21 | 2007-06-21 | Seal structure of die-casting die for high-vacuum pressure diecasting |
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| Publication Number | Publication Date |
|---|---|
| CN201061825Y true CN201061825Y (en) | 2008-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200853419U Expired - Fee Related CN201061825Y (en) | 2007-06-21 | 2007-06-21 | Seal structure of die-casting die for high-vacuum pressure diecasting |
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| CN (1) | CN201061825Y (en) |
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| CN101564766B (en) * | 2008-09-28 | 2011-02-02 | 福建工程学院 | Oriented time-sequence air-suction method for casting mould |
| CN102554181A (en) * | 2010-12-31 | 2012-07-11 | 东莞市东升压铸模具有限公司 | Die casting mold for manufacturing clutch driving disc |
| CN102601928A (en) * | 2012-02-17 | 2012-07-25 | 增城市运豪五金塑料有限公司 | Fully sealed mold ultra-high vacuum die-casting and injection molding device and operation method |
| CN102642007A (en) * | 2012-04-27 | 2012-08-22 | 清华大学 | Vacuum die casting mould |
| CN102784897A (en) * | 2012-08-29 | 2012-11-21 | 太仓奥科机械设备有限公司 | Die casting machine |
| CN103658593A (en) * | 2013-12-06 | 2014-03-26 | 宁波旭升机械有限公司 | Vacuum secondary extrusion die and die casting method |
| CN104325108A (en) * | 2014-04-30 | 2015-02-04 | 上海皮尔博格有色零部件有限公司 | Sealing system of vacuum high-pressure casting mold of aluminum alloy structural member |
| CN104416139A (en) * | 2013-08-25 | 2015-03-18 | 增城市运豪五金塑料有限公司 | Combined full-seal die vacuum box of pressure die-casting machine |
| CN105705272A (en) * | 2014-07-10 | 2016-06-22 | 高东瑾 | Mold apparatus for molding metal in high vacuum environment |
| CN106552917A (en) * | 2016-11-30 | 2017-04-05 | 中国科学院金属研究所 | A kind of high vacuum die casting mould for alloy die cast shaping |
| CN106694845A (en) * | 2016-11-30 | 2017-05-24 | 中国科学院金属研究所 | High-vacuum mold for alloy die-casting formation |
| CN108819074A (en) * | 2018-06-29 | 2018-11-16 | 无锡新宏泰电器科技股份有限公司 | A kind of compression tool Vacuuming structure |
| CN109382496A (en) * | 2018-12-28 | 2019-02-26 | 中信戴卡股份有限公司 | Formed punch assembly and die casting machine including the formed punch assembly |
| CN110052592A (en) * | 2018-01-18 | 2019-07-26 | 小出（台州）模具有限公司 | Thin-wall part vacuum die-casting mould |
| CN110802211A (en) * | 2019-11-29 | 2020-02-18 | 东莞邦达五金有限公司 | Sealing structure of vacuum die-casting die |
| CN114713792A (en) * | 2022-05-19 | 2022-07-08 | 广东鸿图武汉压铸有限公司 | Vacuumizing die-casting die |
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2007
- 2007-06-21 CN CNU2007200853419U patent/CN201061825Y/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101564766B (en) * | 2008-09-28 | 2011-02-02 | 福建工程学院 | Oriented time-sequence air-suction method for casting mould |
| CN102554181B (en) * | 2010-12-31 | 2013-12-18 | 东莞市东升压铸模具有限公司 | Die casting mold for manufacturing clutch driving disc |
| CN102554181A (en) * | 2010-12-31 | 2012-07-11 | 东莞市东升压铸模具有限公司 | Die casting mold for manufacturing clutch driving disc |
| CN102601928A (en) * | 2012-02-17 | 2012-07-25 | 增城市运豪五金塑料有限公司 | Fully sealed mold ultra-high vacuum die-casting and injection molding device and operation method |
| CN102601928B (en) * | 2012-02-17 | 2015-05-13 | 增城市运豪五金塑料有限公司 | Fully sealed mold ultra-high vacuum die-casting and injection molding device and operation method |
| CN102642007B (en) * | 2012-04-27 | 2014-03-19 | 清华大学 | Vacuum die casting mould |
| CN102642007A (en) * | 2012-04-27 | 2012-08-22 | 清华大学 | Vacuum die casting mould |
| CN102784897A (en) * | 2012-08-29 | 2012-11-21 | 太仓奥科机械设备有限公司 | Die casting machine |
| CN104416139A (en) * | 2013-08-25 | 2015-03-18 | 增城市运豪五金塑料有限公司 | Combined full-seal die vacuum box of pressure die-casting machine |
| CN103658593A (en) * | 2013-12-06 | 2014-03-26 | 宁波旭升机械有限公司 | Vacuum secondary extrusion die and die casting method |
| CN104325108A (en) * | 2014-04-30 | 2015-02-04 | 上海皮尔博格有色零部件有限公司 | Sealing system of vacuum high-pressure casting mold of aluminum alloy structural member |
| US9821370B2 (en) | 2014-07-10 | 2017-11-21 | Dong Keun Go | Mold device for forming metal in high-level vacuum environment |
| CN105705272A (en) * | 2014-07-10 | 2016-06-22 | 高东瑾 | Mold apparatus for molding metal in high vacuum environment |
| EP3167977A4 (en) * | 2014-07-10 | 2018-03-07 | Dong Keun Go | Mold apparatus for molding metal in high vacuum environment |
| CN106552917A (en) * | 2016-11-30 | 2017-04-05 | 中国科学院金属研究所 | A kind of high vacuum die casting mould for alloy die cast shaping |
| CN106694845A (en) * | 2016-11-30 | 2017-05-24 | 中国科学院金属研究所 | High-vacuum mold for alloy die-casting formation |
| CN106552917B (en) * | 2016-11-30 | 2019-04-16 | 中国科学院金属研究所 | A kind of high vacuum die casting mold for alloy die cast forming |
| CN110052592A (en) * | 2018-01-18 | 2019-07-26 | 小出（台州）模具有限公司 | Thin-wall part vacuum die-casting mould |
| CN108819074A (en) * | 2018-06-29 | 2018-11-16 | 无锡新宏泰电器科技股份有限公司 | A kind of compression tool Vacuuming structure |
| CN109382496A (en) * | 2018-12-28 | 2019-02-26 | 中信戴卡股份有限公司 | Formed punch assembly and die casting machine including the formed punch assembly |
| CN109382496B (en) * | 2018-12-28 | 2024-01-23 | 中信戴卡股份有限公司 | Punch assembly and die casting machine comprising same |
| CN110802211A (en) * | 2019-11-29 | 2020-02-18 | 东莞邦达五金有限公司 | Sealing structure of vacuum die-casting die |
| CN110802211B (en) * | 2019-11-29 | 2022-01-04 | 东莞邦达五金有限公司 | Sealing structure of vacuum die-casting die |
| CN114713792A (en) * | 2022-05-19 | 2022-07-08 | 广东鸿图武汉压铸有限公司 | Vacuumizing die-casting die |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Gaoyao Hongtai Precision Die Casting Co. Ltd. Assignor: Wuhan Institute of Technology Contract fulfillment period: 2008.6.18 to 2013.11.18 Contract record no.: 2009440000952 Denomination of utility model: Seal structure of die-casting die for high-vacuum pressure diecasting Granted publication date: 20080521 License type: Exclusive license Record date: 20090729 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.6.18 TO 2013.11.18; CHANGE OF CONTRACT Name of requester: GAOYAO HONGTAI PRECISION DIE-CASTING CO., LTD. Effective date: 20090729 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080521 Termination date: 20100621 |