CN102825241B - Metallic low-pressure casting structure with partial pressurizing function - Google Patents

Metallic low-pressure casting structure with partial pressurizing function Download PDF

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Publication number
CN102825241B
CN102825241B CN201210351410.1A CN201210351410A CN102825241B CN 102825241 B CN102825241 B CN 102825241B CN 201210351410 A CN201210351410 A CN 201210351410A CN 102825241 B CN102825241 B CN 102825241B
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China
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metallic
metal mold
increased pressure
die
pressurizing
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CN102825241A (en
Inventor
刘勇
周素洪
翟春泉
翟峰
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HAIMEN HUHAI NONFERROUS CASTING CO Ltd
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HAIMEN HUHAI NONFERROUS CASTING CO Ltd
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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

With the metal-mold low-pressure casting structure of pressurized
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
Due to the structural change of present high-voltage electrical apparatus aluminium casting from large-scale housing gradually to miniaturization, and be merged into a product by original several products and manufacture and design, cause part shape complex structure, workpiece became uneven, adopt some complex product of metal-mold low-pressure casting, the design of running gate system is difficult to the desirability reaching part consecutive solidification, need to adopt Local cooling in the design, add cooling to loose core, change the methods such as partial coating to improve, but as running channel feeding bottom some not as good as not laying cooling core again, adopt the distant product of cooling effect also can produce the loose phenomenon in local.Such as when carrying out certain Shell of circuit breaker and manufacturing, it comprises cylindrical shell, and the upper end of cylindrical shell is flange face, and this kind of structure is when carrying out low pressure casting, and top flange and the abundant place of cylindrical shell easily occur thermal center, cause the defect such as shrinkage porosite, pin hole.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of metal-mold low-pressure casting structure with pressurized, molten metal can be made under half curdled appearance, to 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, lower bolster is installed metal mold die, foundry goods die cavity is formed after metal mold punch and metal mold die matched moulds, metal mold die bottom connects the stalk be communicated with die cavity, its innovative point is: described metal mold punch is located at gap below cope match-plate pattern and certain apart from cope match-plate pattern, and metal mold punch is connected and fixed by connecting rod and cope match-plate pattern; Also comprise a top compression device, top compression device comprises increased pressure board driving mechanism, increased pressure board and pressurization push rod, increased pressure board is arranged on above metal mold punch, increased pressure board is installed some pressurization push rods through metal mold punch surface, and pressurization push rod lower end arranges lower limit, increased pressure board drives vertical lift by the increased pressure board driving mechanism be arranged on cope match-plate pattern.
Further, described increased pressure board driving mechanism is hydraulic jack.
Further, described pressurization lower limiting component of ejector rod is truncated cone-shaped.
The invention has the advantages that: after utilizing stalk to fill type, when die cavity top metal liquid is just in half curdled appearance, drive increased pressure board descending by increased pressure board driving mechanism, pressurization push rod stretches into pressurization in die cavity, the abundant place of cast top in die cavity is solidified under pressure, avoid the defect such as shrinkage porosite, pin hole, improve casting qualified rate, reduce manufacturing cost.Meanwhile, pressurization push rod can be utilized to carry out the demoulding to foundry goods, and the demoulding is convenient.
Accompanying drawing explanation
Fig. 1 is the metal-mold low-pressure casting structural representation of band pressurized of the present invention.
Detailed description of the invention
As shown in Figure 1, 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 is comprised.
Above-mentioned cope match-plate pattern 1 is arranged on the slide block of hydraulic press, lower bolster 2 is arranged on hydraulic press workbench, medium casting mould of the present invention is metal pattern, comprise metal mold punch 3 and metal mold die 4, the die cavity 10 of foundry goods is formed after both matched moulds, wherein, metal mold die 4 is fixed on lower bolster 2, and the bottom of metal mold die 4 connects the stalk 5 be communicated with die cavity 10.
Metal mold punch 3 is located at below cope match-plate pattern 1, and the distance certain apart from cope match-plate pattern, metal mold punch 3 is connected and fixed by connecting rod 6 and cope match-plate pattern 1.Space between metal mold punch 3 upper surface and cope match-plate pattern 1 is for installing top compression device.
Top compression 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 hydraulic jack, and the well known organization that can certainly can drive increased pressure board movement in the vertical direction for other, repeats no more here.Increased pressure board 8 is arranged on above metal mold punch 3, drives vertical lift by the hydraulic jack be arranged on cope match-plate pattern 1.Increased pressure board 8 is installed some pressurization push rods 9 stretching into foundry goods die cavity top, the position of pressurization push rod 9 just easily should form the thick general goal of thermal center to cast top, and quantity and the diameter of pressurization push rod 9 are arranged according to the size of foundry goods.Pressurization push rod 9 lower end arranges lower limit, and in the present embodiment, lower limit is truncated cone-shaped, and opens the counterbore coordinated with this lower limit in the upper profile of metal mold punch 3.
Operation principle: when aluminium liquid enters mold cavity by the atmospheric pressure of 0.1MPa through stalk 5, be filled with die cavity 10, carry out pressurize under keeping the atmospheric pressure of 0.1MPa and fill type, when after about 1-2 second after being full of die cavity, under now aluminium liquid in top is in half curdled appearance, pressurizeed by top hydraulic jack, pressurization push rod 9 workpiece top of pressurizeing in die cavity is promoted abundant by increased pressure board 8, the thick general goal in the top of foundry goods is solidified under pressure, release after a few minutes, cope match-plate pattern 1 is opened by the slide block of hydraulic press, foundry goods is contracted on metal mold punch 3, one the same moving departs from metal mold die 4, and then ejected by hydraulic jack, the foundry goods that pressurization push rod is about on metal mold punch 3 for 9 times pushes and realizes the demoulding.
Machined after Overheating Treatment, after testing, the shrinkage porosite of cast top, pin-hole phenomena obtain larger improvement, and qualification rate reaches more than 95%.

Claims (3)

1. the metal-mold low-pressure casting structure with pressurized, comprise cope match-plate pattern, lower bolster, metal mold punch, metal mold die, stalk, lower bolster is installed metal mold die, foundry goods die cavity is formed after metal mold punch and metal mold die matched moulds, metal mold die bottom connects the stalk be communicated with die cavity, it is characterized in that: described metal mold punch is located at distance below cope match-plate pattern and certain apart from cope match-plate pattern, and metal mold punch is connected and fixed by connecting rod and cope match-plate pattern; Also comprise a top compression device, top compression device comprises increased pressure board driving mechanism, increased pressure board and pressurization push rod, increased pressure board is arranged on above metal mold punch, increased pressure board is installed some pressurization push rods through metal mold punch surface, and pressurization push rod lower end arranges lower limit, increased pressure board drives vertical lift by the increased pressure board driving mechanism be arranged on cope match-plate pattern.
2. the metal-mold low-pressure casting structure of band pressurized according to claim 1, is characterized in that: described increased pressure board driving mechanism is hydraulic jack.
3. the metal-mold low-pressure casting structure of band pressurized according to claim 1, is characterized in that: described pressurization lower limiting component of ejector rod is truncated cone-shaped.
CN201210351410.1A 2012-09-21 2012-09-21 Metallic low-pressure casting structure with partial pressurizing function Active CN102825241B (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104162642B (en) * 2013-05-17 2016-06-29 贵州大学 A kind of casting forming flexibility feeding elasticity device for exerting
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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