CN102825241A - Metallic low-pressure casting structure with partial pressurizing function - Google Patents
Metallic low-pressure casting structure with partial pressurizing function Download PDFInfo
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- CN102825241A CN102825241A CN2012103514101A CN201210351410A CN102825241A CN 102825241 A CN102825241 A CN 102825241A CN 2012103514101 A CN2012103514101 A CN 2012103514101A CN 201210351410 A CN201210351410 A CN 201210351410A CN 102825241 A CN102825241 A CN 102825241A
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Abstract
The invention relates to a metallic low-pressure casting structure with a partial pressurizing function. The metallic low-pressure casting structure comprises an upper template, a lower template, a metallic convex die, a metallic concave die and a liquid rising tube; the metallic convex die and the metallic concave die are assembled to form a casting piece cavity; and the bottom end of the metallic concave die is connected with the liquid rising tube communicated with the cavity. The metallic low-pressure casting structure is innovatively characterized in that the metallic convex die is arranged below the upper template, and has a certain gap with the upper template; the metallic convex die is fixedly connected with the upper template through a connecting rod; and the metallic low-pressure casting structure further comprises a top pressurizing device. In a liquid filling process, metal liquid at the top after mold filling is in a semi-solidification state, a pressurizing board driving mechanism drives a pressurizing board to go downwards, and a pressurizing top rod extends into the cavity for pressurizing, so that the thick part at the top of a casting piece in the cavity is solidified under an pressure effect, thus avoiding the defects of shrinkage porosity, pinholes and the like, improving the yield of the casting piece and reducing the manufacturing cost. Meanwhile, the metallic low-pressure casting structure can be used for using the pressurizing top rod to de-mold a casting piece; and the de-molding operation is more convenient.
Description
Technical field
The present invention relates to a kind of non-ferrous metal low pressure casting, particularly a kind of metal-mold low-pressure casting structure.
Background technology
Because high-voltage electrical apparatus aluminium casting structural change now, and is merged into a product by several original products and manufactures and designs gradually to the miniaturization development from large-scale housing, causes the part shape complex structure; The workpiece became uneven; Adopt some complex product of metal-mold low-pressure casting, the design of running gate system is difficult to reach the desirable demand of part consecutive solidification, need in design, adopt local cooling; Adding cooling looses core; Change method such as partial coating and improve, but as some bottom running channel feeding not as good as not laying cooling core again, adopt the distant product of cooling effect also can produce local loose phenomenon.For example when carrying out certain Shell of circuit breaker manufacturing, it comprises cylindrical shell, and the upper end of cylindrical shell is a flange face, and this kind structure is when carrying out low pressure casting, and the abundant place of top flange and cylindrical shell is prone to thermal center, causes defectives such as shrinkage porosite, pin hole.
Summary of the invention
The technical problem that the present invention will solve provides a kind of metal-mold low-pressure casting structure with pressurized, can make molten metal under half curdled appearance, carry out pressurized at the moment localized metallic liquid that die cavity is full of and solidify.
For solving the problems of the technologies described above; Technical scheme of the present invention is: a kind of metal-mold low-pressure casting structure with pressurized; Comprise cope match-plate pattern, lower bolster, metal mold punch, metal mold die, stalk; The metal mold die is installed on the lower bolster, is constituted the foundry goods die cavity behind metal mold punch and the metal mold die matched moulds, metal mold die bottom connects the stalk that is communicated with die cavity; Its innovative point is: said metal mold punch is located at the cope match-plate pattern below and apart from the cope match-plate pattern certain clearance, the metal mold punch is connected fixing with cope match-plate pattern through connecting rod; Also comprise a top pressue device; The top pressue device comprises increased pressure board driving mechanism, increased pressure board and pressurization push rod; Increased pressure board is arranged on metal mold punch top; Some pressurization push rods that pass metal mold punch profile are installed on the increased pressure board, and pressurization push rod lower end is provided with lower limit, increased pressure board is by the increased pressure board drive mechanism vertical lift that is installed on the cope match-plate pattern.
Further, said increased pressure board driving mechanism is a hydraulic jack.
Further, said pressurization push rod lower limit is a truncated cone-shaped.
The invention has the advantages that: after utilizing stalk to fill type; When die cavity top metal liquid just was in half curdled appearance, descending by increased pressure board drive mechanism increased pressure board, the pressurization push rod stretched into pressurization in the die cavity; Make the interior abundant place of cast top of die cavity solidify under pressure; Avoid defectives such as shrinkage porosite, pin hole, improve casting qualified rate, reduce manufacturing cost.Simultaneously, can utilize the pressurization push rod that foundry goods is carried out the demoulding, the demoulding is convenient.
Description of drawings
Fig. 1 is the metal-mold low-pressure casting structural representation of band pressurized of the present invention.
The specific embodiment
As shown in Figure 1, comprise cope match-plate pattern 1, lower bolster 2, metal mold punch 3, metal mold die 4, stalk 5, connecting rod 6, increased pressure board driving mechanism 7, increased pressure board 8 and pressurization push rod 9.
Above-mentioned cope match-plate pattern 1 is installed on the slide block of hydraulic press; Lower bolster 2 is installed on the hydraulic press workbench, and medium casting mould of the present invention is a metal pattern, comprises metal mold punch 3 and metal mold die 4; Constitute the die cavity 10 of foundry goods behind both matched moulds; Wherein, metal mold die 4 is fixed on the lower bolster 2, and the bottom of metal mold die 4 connects the stalk 5 that is communicated with die cavity 10.
Metal mold punch 3 is located at cope match-plate pattern 1 below, and apart from the certain distance of cope match-plate pattern, metal mold punch 3 is connected fixing with cope match-plate pattern 1 through connecting rod 6.Space between metal mold punch 3 upper surfaces and the cope match-plate pattern 1 is used to install the top pressue device.
The top pressue device comprises increased pressure board driving mechanism 7, increased pressure board 8 and pressurization push rod 9, and in the present embodiment, increased pressure board driving mechanism 7 is a hydraulic jack, can certainly can drive increased pressure board at the well known organization that vertical direction moves for other, repeats no more here.Increased pressure board 8 is arranged on metal mold punch 3 tops, drives vertical lift by the hydraulic jack that is installed on the cope match-plate pattern 1.Some pressurization push rods 9 that stretch into foundry goods die cavity top are installed on the increased pressure board 8, and the position of pressurization push rod 9 should be prone to form the thick general goal of thermal center over against cast top, and the quantity of pressurization push rod 9 and diameter are according to the size setting of foundry goods.Pressurization push rod 9 lower ends are provided with lower limit, and in the present embodiment, lower limit is a truncated cone-shaped, and on profile on the metal mold punch 3, opens the counterbore that cooperates with this lower limit.
Operation principle: the atmospheric pressure that passes through 0.1MPa when aluminium liquid gets into mold cavities through stalk 5, charges into die cavity 10, carries out pressurize under the atmospheric pressure of maintenance 0.1MPa and fills type; Approximately 1-2 is after second after being full of die cavity, and this moment, top aluminium liquid was under half curdled appearance, was pressurizeed by the top hydraulic jack; Promote the pressurization push rods 9 abundant place, workpiece top of in die cavity, pressurizeing by increased pressure board 8; Make the thick general goal in top of foundry goods solidify under pressure, release after a few minutes is opened cope match-plate pattern 1 by the slide block of hydraulic press; Foundry goods is contracted on the metal mold punch 3; One the same moving breaks away from metal mold die 4, and then ejected by hydraulic jack, and the foundry goods that makes the pressurization push rod be about to for 9 times on the metal mold punch 3 pushes the realization demoulding.
Machined after Overheating Treatment, through detecting, the shrinkage porosite of cast top, pin hole phenomenon obtain bigger improvement, and qualification rate reaches more than 95%.
Claims (3)
1. metal-mold low-pressure casting structure with pressurized; Comprise cope match-plate pattern, lower bolster, metal mold punch, metal mold die, stalk; The metal mold die is installed on the lower bolster, is constituted the foundry goods die cavity behind metal mold punch and the metal mold die matched moulds, metal mold die bottom connects the stalk that is communicated with die cavity; It is characterized in that: said metal mold punch is located at the cope match-plate pattern below and apart from the certain distance of cope match-plate pattern, the metal mold punch is connected fixing with cope match-plate pattern through connecting rod; Also comprise a top pressue device; The top pressue device comprises increased pressure board driving mechanism, increased pressure board and pressurization push rod; Increased pressure board is arranged on metal mold punch top; Some pressurization push rods that pass metal mold punch profile are installed on the increased pressure board, and pressurization push rod lower end is provided with lower limit, increased pressure board is by the increased pressure board drive mechanism vertical lift that is installed on the cope match-plate pattern.
2. the metal-mold low-pressure casting structure of band pressurized according to claim 1 is characterized in that: said increased pressure board driving mechanism is a hydraulic jack.
3. the metal-mold low-pressure casting structure of band pressurized according to claim 1 is characterized in that: said pressurization push rod lower limit is a truncated cone-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210351410.1A CN102825241B (en) | 2012-09-21 | 2012-09-21 | Metallic low-pressure casting structure with partial pressurizing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210351410.1A CN102825241B (en) | 2012-09-21 | 2012-09-21 | Metallic low-pressure casting structure with partial pressurizing function |
Publications (2)
| Publication Number | Publication Date |
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| CN102825241A true CN102825241A (en) | 2012-12-19 |
| CN102825241B CN102825241B (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210351410.1A Active CN102825241B (en) | 2012-09-21 | 2012-09-21 | Metallic low-pressure casting structure with partial pressurizing function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162642A (en) * | 2013-05-17 | 2014-11-26 | 贵州大学 | Die-casting formation flexible feeding method and elastic pressure applying method |
| CN109382500A (en) * | 2017-08-07 | 2019-02-26 | 北京三未科技发展有限公司 | A kind of all-aluminium piston exempts from cast molding device and forming method |
| CN114130990A (en) * | 2021-12-20 | 2022-03-04 | 苏州明志科技股份有限公司 | Local pressure device of low pressure casting and low pressure casting equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0323051A (en) * | 1989-06-21 | 1991-01-31 | Kobe Steel Ltd | Low pressure casting apparatus |
| JPH04135048A (en) * | 1990-09-20 | 1992-05-08 | Kobe Steel Ltd | Low pressure casting method |
| CN101229580A (en) * | 2007-12-28 | 2008-07-30 | 中国兵器工业第五二研究所 | Partial pressurizing feeding technology of shape casting and control apparatus thereof |
| CN202824612U (en) * | 2012-09-21 | 2013-03-27 | 海门市沪海有色铸造有限公司 | Metal type low pressure casting structure with local pressing |
-
2012
- 2012-09-21 CN CN201210351410.1A patent/CN102825241B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0323051A (en) * | 1989-06-21 | 1991-01-31 | Kobe Steel Ltd | Low pressure casting apparatus |
| JPH04135048A (en) * | 1990-09-20 | 1992-05-08 | Kobe Steel Ltd | Low pressure casting method |
| CN101229580A (en) * | 2007-12-28 | 2008-07-30 | 中国兵器工业第五二研究所 | Partial pressurizing feeding technology of shape casting and control apparatus thereof |
| CN202824612U (en) * | 2012-09-21 | 2013-03-27 | 海门市沪海有色铸造有限公司 | Metal type low pressure casting structure with local pressing |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162642A (en) * | 2013-05-17 | 2014-11-26 | 贵州大学 | Die-casting formation flexible feeding method and elastic pressure applying method |
| CN104162642B (en) * | 2013-05-17 | 2016-06-29 | 贵州大学 | A kind of casting forming flexibility feeding elasticity device for exerting |
| CN109382500A (en) * | 2017-08-07 | 2019-02-26 | 北京三未科技发展有限公司 | A kind of all-aluminium piston exempts from cast molding device and forming method |
| CN109382500B (en) * | 2017-08-07 | 2023-11-07 | 北京三未科技发展有限公司 | Casting-free forming device and forming method for aluminum alloy piston |
| CN114130990A (en) * | 2021-12-20 | 2022-03-04 | 苏州明志科技股份有限公司 | Local pressure device of low pressure casting and low pressure casting equipment |
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| CN102825241B (en) | 2015-07-08 |
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