CN205096485U - Aluminum alloy gravity casting metal pattern is with compound dead head - Google Patents
Aluminum alloy gravity casting metal pattern is with compound dead head Download PDFInfo
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- CN205096485U CN205096485U CN201520877767.2U CN201520877767U CN205096485U CN 205096485 U CN205096485 U CN 205096485U CN 201520877767 U CN201520877767 U CN 201520877767U CN 205096485 U CN205096485 U CN 205096485U
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Abstract
The utility model provides an aluminum alloy gravity casting metal pattern is with compound dead head, the shape is the cavity cylindric, the metal casing be hollow, it has refractory fiber to pack, and be sealed with the closing cap, the internal surface of metal -back at contact aluminium liquid is equipped with surface coating. This surface coating is difficult to ftracture and drops, and resistant high temperature thermal insulation keeps warm, can improve aluminium liquid utilization ratio, foundry goods yield, and reduces the energy consumption. The utility model has the advantages of high, workable, easy welding of iron dead head intensity and refractory material dead head thermal insulation performance are good, avoided that iron dead head size is big, the heat dissipation is fast, refractory material dead head intensity is low, short -lived shortcoming.
Description
Technical field
The utility model relates to aluminium alloy casting field, particularly a kind of Aluminum alloy gravity casting metals mould compound dead head.
Background technology
In casting process, after molten metal pours into mould, by liquid cooled solidify change into solid-state, produce volume contraction.When volume contraction can not get molten metal supplement time, solidify in rear foundry goods and can produce shrinkage cavity and porosity, shrinkage cavity and porosity can reduce the compactness of foundry goods, greatly reduces mechanical castings, therefore must manage control solidi fication, prevents defect from occurring.Use rising head, be at present in casting industry control solidi fication, compensate for shrinkage the most effectively, the most universal technological measure.
In casting reduced size foundry goods, cast gate and rising head can be merged into dead head, reduce mould complexity.Traditional moulds dead head is generally up big and down small inverted conical platform shape, employing ferrous material makes, because ferrous material thermal conductivity factor is 45-60W/MK, rapid heat dissipation, in order to ensure that dead head place temperature of aluminum liquid is higher than foundry goods, so this kind of dead head often size is larger, therefore dead head even exceedes the weight of product sometimes; Aluminium liquid and iron directly contact and chemical reaction can occur, and not only cause dead head to corrode, and cast properties also can be caused to decline; Although as dead head adopt refractory material as the size such as alumina silicate, mullite can do less, because intensity is not enough, service life is shorter.
Summary of the invention
The utility model is the weak point for avoiding existing for above-mentioned prior art, a kind of Aluminum alloy gravity casting metals mould compound dead head is provided, object is the improvement by structural design, hollow is designed to by metal shell, be filled with refractory fibre, and be provided with face coat at the metal shell inner surface of contact aluminium liquid, utilize the insulation effect of refractory fibre and the high temperature resistant heat insulation effect of face coat, make dead head intensity high size little, long service life.
The technical solution adopted in the utility model is:
A kind of Aluminum alloy gravity casting metals mould compound dead head, its feature is: comprise metal shell, refractory fibre and face coat, and shape is hollow barrel-type; Described metal shell is hollow, is filled with refractory fibre, with lidstock; Described face coat is provided with at the metal shell inner surface of contact aluminium liquid.
Feature of the present utility model is also:
The composition proportion of described face coat is: borax (2-5) %, graphite powder (2-4) %, alumina powder (20-30) %, silica powder (25-30) %, high-temperature flame-proof cement (15-25) %, and remaining is waterglass.
Described refractory fibre is alumina silicate fibre or mullite fiber or alumina fibre.
The material of described metal shell is steel or cast iron, and wall thickness is 1-10mm.
The beneficial effects of the utility model are:
1, the utility model has the advantage of high, the easy processing of irony dead head intensity, easily welding and refractory material dead head good heat insulating, avoids that irony dead head size is large, rapid heat dissipation; Refractory material dead head intensity is low, the shortcoming that the life-span is short.
2, the utility model has easy making, easy to use, the life-span is long, and cost is low.
3, face coat of the present utility model is easy to crack and come off, and thermostable heat-isolating, can improve aluminium liquid utilization rate, casting yield, reduces energy consumption.For automotive oil tank sensor fuel tap product, the product that traditional irony dead head is produced, dead head weight is about the 1.3-1.5 of product weight doubly, and product qualified cast rate is about 85%; After using the utility model, dead head weight reduces to the 50-60% of product weight, and one time qualified cast rate rises to more than 99%.The pure refractory material dead head life-span is generally no more than 100, and the utility model life-span can reach more than 10000.
Accompanying drawing explanation
Fig. 1 is Aluminum alloy gravity casting metals mould compound dead head sectional view.
Fig. 2 is Fig. 1 top view.
Fig. 3 is Aluminum alloy gravity casting metals mould compound dead head application schematic diagram.
Number in the figure: 1 metal shell, 2 refractory fibres, 3 face coats, 4 cappings, 5 casting metals moulds, 6 molten aluminium alloy, 7 pony ladles.
Detailed description of the invention
embodiment 1
Be Aluminum alloy gravity casting metals mould compound dead head sectional view see Fig. 1 and Fig. 2: Fig. 1; Fig. 2 is Fig. 1 top view;
A kind of Aluminum alloy gravity casting metals mould compound dead head of the present utility model, comprise metal shell 1, refractory fibre 2 and face coat 3, its feature is: shape is hollow barrel-type; Described metal shell 1 is hollow, is filled with refractory fibre 2, seals with capping 4; Described face coat 3 is provided with at metal shell 1 inner surface of contact aluminium liquid.
Feature of the present utility model is also:
The composition proportion of described face coat 3 is: borax 4%, graphite powder 3%, alumina powder 25%, silica powder 28%, high-temperature flame-proof cement 22%, and remaining is waterglass.
Described refractory fibre 2 is alumina silicate fibre or mullite fiber or alumina fibre.
The material of described metal shell 1 is 20 steel, and wall thickness is 5mm.
The making of a kind of Aluminum alloy gravity casting metals mould compound dead head of the present utility model: metal shell 1 No. 20 steel process, capping 4 is welded with electric welding after full refractory fibre 2 is filled in metal shell 1 inside, and to needing the surface of coating carry out deburring, sandblasting and degrease; Weigh each material by the composition proportion of described face coat 3, put into make slurry after container stirs can direct spraying or brushing, slurry concentration dilutable water adjusts.The coating of spraying or brushing can will use after room temperature airing.
It is high temperature resistant, anti-oxidant that face coat 3 of the present utility model is that one has, corrosion resistance, strong adhesion and the good high-temperaure coating of high-temperature stability.This coating is effectively isolated and is prevented aluminium liquid to the erosion of metal shell 1, and has good heat-blocking action.
Be Aluminum alloy gravity casting metals mould compound dead head application schematic diagram see Fig. 3: Fig. 3.
A kind of Aluminum alloy gravity casting metals mould compound dead head of the present utility model be integral solder on casting metals mould 5, with pony ladle 7, molten aluminium alloy 6 is cast to metal pattern internal shaping.
embodiment 2
According to a kind of Aluminum alloy gravity casting metals mould compound dead head that embodiment 1 makes, wherein difference is:
The composition proportion of described face coat 3 is: borax 2%, graphite powder 4%, alumina powder 20%, silica powder 30%, high-temperature flame-proof cement 25%, and remaining is waterglass.
The material of described metal shell 1 is cast iron, and wall thickness is 10mm.
embodiment 3
According to a kind of Aluminum alloy gravity casting metals mould compound dead head that embodiment 1 makes, wherein difference is:
The composition proportion of described face coat 3 is: borax 5%, graphite powder 2%, alumina powder 30%, silica powder 25%, high-temperature flame-proof cement 15%, and remaining is waterglass.
The material of described metal shell 1 is 10 steel, and wall thickness is 1mm.
Claims (3)
1. an Aluminum alloy gravity casting metals mould compound dead head, is characterized in that: comprise metal shell (1), refractory fibre (2) and face coat (3), shape is hollow barrel-type; Described metal shell (1) is hollow, is filled with refractory fibre (2), seals with capping (4); Described face coat (3) is provided with at metal shell (1) inner surface of contact aluminium liquid.
2. a kind of Aluminum alloy gravity casting metals mould compound dead head according to claim 1, is characterized in that: described refractory fibre (2) is alumina silicate fibre or mullite fiber or alumina fibre.
3. a kind of Aluminum alloy gravity casting metals mould compound dead head according to claim 1 and 2, is characterized in that: the material of described metal shell (1) is steel or cast iron, and wall thickness is 1-10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520877767.2U CN205096485U (en) | 2015-11-06 | 2015-11-06 | Aluminum alloy gravity casting metal pattern is with compound dead head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520877767.2U CN205096485U (en) | 2015-11-06 | 2015-11-06 | Aluminum alloy gravity casting metal pattern is with compound dead head |
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| CN205096485U true CN205096485U (en) | 2016-03-23 |
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| CN201520877767.2U Active CN205096485U (en) | 2015-11-06 | 2015-11-06 | Aluminum alloy gravity casting metal pattern is with compound dead head |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105215280A (en) * | 2015-11-06 | 2016-01-06 | 合肥熠辉轻合金科技有限公司 | A kind of Aluminum alloy gravity casting metals mould compound dead head |
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2015
- 2015-11-06 CN CN201520877767.2U patent/CN205096485U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105215280A (en) * | 2015-11-06 | 2016-01-06 | 合肥熠辉轻合金科技有限公司 | A kind of Aluminum alloy gravity casting metals mould compound dead head |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |