CN101433945A - Secondary sand-shooting molding technique for casting sand core - Google Patents
Secondary sand-shooting molding technique for casting sand core Download PDFInfo
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- CN101433945A CN101433945A CNA2008102434508A CN200810243450A CN101433945A CN 101433945 A CN101433945 A CN 101433945A CN A2008102434508 A CNA2008102434508 A CN A2008102434508A CN 200810243450 A CN200810243450 A CN 200810243450A CN 101433945 A CN101433945 A CN 101433945A
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- sand
- core
- loam core
- sand core
- whole
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Abstract
The invention discloses a two-time sand shooting forming process for casting a sand core. Firstly a mould is provided with a small sand core mould cavity, in which a mould joint is different from a mould joint of the whole sand core, and a whole sand core mould cavity inside, and a sand inlet is arranged on each mould cavity; the small mould cavity is subjected to sand shooting to produce a small sand core; the small sand core is taken out, placed on a position corresponding to the whole sand core mould cavity, and subjected to mold spotting, and the sand is shot in the whole sand core mould cavity to produce the whole sand core. The process has the advantages of one-time forming and simple and quick operation; and for the formed sand core, no connector is existed, and no phenomenon of core breaking, burr and flap edge occurs, thereby effectively ensuring the quality of the sand core.
Description
Technical field
The present invention relates to a kind of casting technique, the secondary that is specifically related to the mo(u)ld core of two kinds of die joints of a kind of quick casting is penetrated the sand moulding process.
Background technology
Because the shape size in loam core is irregular, and the spacing between the loam core is less, during the loam core of two kinds of die joints of casting, position up till now, foundry industry still adopts the loam core of making two kinds of die joints respectively, and is then that the loam core of different profiles is bonding by the artificial glue of using, and forms the loam core of an integral body.The defective of this technology is: 1, make the loam core of two different profiles, need two secondary moulds, increase cost of manufacture; 2, the loam core of two die joints is carried out manually bondingly, is difficult to avoid fash, burr, overlap, and the yardstick inaccuracy, and disconnected core also appears in abutting edge easily, influences casting quality.
Summary of the invention
The secondary that the invention provides a kind of mo(u)ld core is penetrated the sand moulding process, specifically is a kind of rapid shaping, reduces cost and can guarantee effectively that the secondary of the mo(u)ld core of loam core quality penetrates the sand moulding process.
In order to solve above technical problem, the secondary of a kind of mo(u)ld core of the present invention is penetrated the sand moulding process, it is characterized in that: described step is as follows: a, be provided with a die joint little loam core die cavity different with whole loam core die joint and a whole loam core die cavity in mould, and be provided with sand inlet on each die cavity; B, the little die cavity in the mould is penetrated sand, produce little loam core; C, little loam core is taken out, is placed on the corresponding position of die cavity, whole loam core, then matched moulds, to whole loam core die cavity injection sand, produce whole loam core.
The described sand air pressure of penetrating is 0.5Mpa.
Described loam core forming temperature is more than 200 degrees centigrade.
Described loam core molding time is 2-3 minutes.
The advantage of above technology is: by making little loam core earlier, then little loam core is placed in the whole loam core die cavity as inserts, penetrates sand and be made into whole loam core.This makes one-shot forming, and the phenomenon of disconnected core, burr, overlap can not appear in simple and fast, and the loam core non junction of moulding, effectively guarantees the quality in loam core.
Description of drawings
Figure is a mould structure schematic diagram of the present invention.
The specific embodiment
A kind of secondary of mo(u)ld core is penetrated the sand moulding process, described step is as follows: at first, as shown in the figure, in mould 1, be provided with a die joint little loam core die cavity 2 different and a whole loam core die cavity 3, and on each die cavity, be provided with sand inlet 4 with whole loam core die joint; And on mould 1, be provided with electric heater unit 5.
Then, coating release agent in the small-sized chamber 2 in mould 1, matched moulds passes through gas more then
Pressure device is penetrated sand with the air pressure of 0.5Mpa, is more than 200 degrees centigrade in temperature then
Kept 2-3 minute under the temperature, produce little loam core.
Little loam core is taken out in die sinking, is placed on whole loam core die cavity 3 corresponding positions, and is right
Back matched moulds, press said process, sand that injects and little loam core knot to whole loam core die cavity 3 injection sand
Close, produce the whole loam core of different die joints.
The described sand air pressure of penetrating is 0.5Mpa.
Described loam core forming temperature is more than 200 degrees centigrade.
Described loam core molding time is 2-3 minutes.
Claims (4)
1, a kind of secondary of mo(u)ld core is penetrated the sand moulding process, it is characterized in that: described step is as follows: a, be provided with a die joint little loam core die cavity different with whole loam core die joint and a whole loam core die cavity in mould, and be provided with sand inlet on each die cavity; B, the little die cavity in the mould is penetrated sand, produce little loam core; C, little loam core is taken out, is placed on the corresponding position of die cavity, whole loam core, then matched moulds, to whole loam core die cavity injection sand, produce whole loam core.
2, the secondary of a kind of mo(u)ld core according to claim 1 is penetrated the sand moulding process, it is characterized in that: the described sand air pressure of penetrating is 0.5Mpa.
3, the secondary of a kind of mo(u)ld core according to claim 1 is penetrated the sand moulding process, it is characterized in that: described loam core forming temperature is more than 200 degrees centigrade.
4, the secondary of a kind of mo(u)ld core according to claim 1 is penetrated the sand moulding process, it is characterized in that: described loam core molding time is 2-3 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102434508A CN101433945A (en) | 2008-12-18 | 2008-12-18 | Secondary sand-shooting molding technique for casting sand core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102434508A CN101433945A (en) | 2008-12-18 | 2008-12-18 | Secondary sand-shooting molding technique for casting sand core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101433945A true CN101433945A (en) | 2009-05-20 |
Family
ID=40708672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102434508A Pending CN101433945A (en) | 2008-12-18 | 2008-12-18 | Secondary sand-shooting molding technique for casting sand core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101433945A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102328031A (en) * | 2011-10-19 | 2012-01-25 | 江苏力源金河铸造有限公司 | Sand ejection process for sand core of back cover casting |
| CN102441644A (en) * | 2010-12-03 | 2012-05-09 | 南通冠峰铸造有限公司 | Precoated sand core secondary shooting process of casting runner machinery |
| CN106424582A (en) * | 2016-10-28 | 2017-02-22 | 江苏华培动力科技有限公司 | Molding process for sand cores used for casting turbocharger shells |
| CN111299506A (en) * | 2018-12-11 | 2020-06-19 | 无锡众鑫模具科技有限公司 | Hot core box of blade core and production process thereof |
| CN114147187A (en) * | 2021-11-30 | 2022-03-08 | 湖北谷城东华科技有限公司 | Machining process of casting mold |
-
2008
- 2008-12-18 CN CNA2008102434508A patent/CN101433945A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102441644A (en) * | 2010-12-03 | 2012-05-09 | 南通冠峰铸造有限公司 | Precoated sand core secondary shooting process of casting runner machinery |
| CN102328031A (en) * | 2011-10-19 | 2012-01-25 | 江苏力源金河铸造有限公司 | Sand ejection process for sand core of back cover casting |
| CN106424582A (en) * | 2016-10-28 | 2017-02-22 | 江苏华培动力科技有限公司 | Molding process for sand cores used for casting turbocharger shells |
| CN111299506A (en) * | 2018-12-11 | 2020-06-19 | 无锡众鑫模具科技有限公司 | Hot core box of blade core and production process thereof |
| CN114147187A (en) * | 2021-11-30 | 2022-03-08 | 湖北谷城东华科技有限公司 | Machining process of casting mold |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090520 |