CN212398080U - Pneumatic heat-insulating riser device - Google Patents
Pneumatic heat-insulating riser device Download PDFInfo
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- CN212398080U CN212398080U CN202020974620.6U CN202020974620U CN212398080U CN 212398080 U CN212398080 U CN 212398080U CN 202020974620 U CN202020974620 U CN 202020974620U CN 212398080 U CN212398080 U CN 212398080U
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Abstract
The invention discloses a pneumatic heat-insulating riser device.A top cover plate is arranged on the top of an upper die and close to an upper template, and a lower insert is arranged on the upper die and connected with the upper cover plate; an air heat insulation area is formed between the upper die and the outer parts of the upper cover plate and the lower insert. And a plurality of riser filling type local exhaust areas are arranged at the joint between the upper cover plate and the lower insert. During casting mold filling, aluminum liquid rises to a casting riser mold filling area formed inside the lower insert, air enters a riser air pressure feeding area formed inside the upper cover plate, and the air heat insulation area is exhausted through the riser mold filling exhaust area; air in the riser air pressure feeding area generates pressure to feed aluminum liquid in the casting riser mold filling area, and the air temperature in the air heat insulation area is close to the temperature of the aluminum liquid, so that the riser heat insulation effect is achieved. The invention adopts the modes of air pressure type riser head shrinkage and repair and air heat insulation, the casting riser head shrinkage efficiency is improved by more than 50 percent, and the casting yield is obviously improved.
Description
Technical Field
The invention relates to the field of casting industry, in particular to a heat-insulating riser device applied to the casting industry and used in a casting process.
Background
At present, in the gravity low-pressure casting process of aluminum alloy, an upper die arranged on a gravity low-pressure casting die and an insulating riser device corresponding to a riser at the top of a casting are used, and the insulating riser mode commonly applied in the casting industry is generally an exothermic insulating riser or a riser made of calcium silicate insulating material: the heating and heat-insulating riser is used for insulating the riser through a heating material, is generally disposable, and has large cost waste; the riser made of the calcium silicate heat-insulating material is used for insulating heat of the riser, and is easy to crack in the using process due to poor toughness, so that the riser also belongs to a vulnerable part in the general production process, needs to be replaced periodically, and is relatively troublesome to operate, and the production cost is relatively high due to the high price of the heat-insulating material. Because the heat-insulating exothermic material needs to be replaced frequently, the feeding effect of the casting riser is not ideal.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the air pressure type heat preservation feeder head device which can be used for a long time at one time, does not need to be replaced frequently and has good feeding effect on the casting feeder head.
The purpose of the invention is realized by the following technical scheme: the pneumatic heat-insulating riser device comprises an upper die and an upper die plate, wherein an upper cover plate is arranged on the top of the upper die and close to the upper die plate, and a lower insert is arranged on the upper die and connected with the upper cover plate; an air heat insulation and preservation area is formed between the upper die and the outer part of the upper cover plate and the outer part of the lower insert, and the joint between the upper cover plate and the lower insert adopts an integral sealing and local exhaust mutually-matched structure.
The casting structure is characterized in that a riser air pressure feeding area is formed in the upper cover plate and is not limited to the riser air pressure feeding area, a casting riser molding area is formed in the lower insert and is not limited to the casting riser molding area, and a plurality of riser molding local exhaust areas are arranged at the joint of the upper cover plate and the lower insert.
Compared with the prior art, the invention adopts the air pressure compensation and the air heat insulation mode of the air heat insulation area, can completely replace heat insulation or heating materials, and obviously reduces the production cost. And the feeding efficiency of the casting riser can be improved by more than 50%, and the casting process yield is obviously improved.
Drawings
The invention is further described with reference to the following detailed description and accompanying drawings.
Fig. 1 is a schematic view of an installation structure of the pneumatic insulated feeder apparatus of the present invention.
Fig. 2 is an enlarged view of the mark a in fig. 1 (the upper cover plate is integrally and hermetically matched with the lower insert).
Fig. 3 is an enlarged view of the mark B in fig. 1 (the upper cover plate is partially air-vented and matched with the lower insert).
Detailed Description
Referring to fig. 1 to 3, the pneumatic insulated feeder of the present invention comprises an upper die 1 and an upper die plate 8, wherein an upper cover plate 2 (at an upper position) is mounted on the top of the upper die 1 and near the upper die plate, and a lower insert 4 (in a hollow tube shape, a hollow polygon shape or a hollow special shape, at a lower position) is mounted on the upper die 1 and connected with the upper cover plate 2; an air heat insulation and preservation area 6 is formed between the upper die 1 and the outer part of the upper cover plate 2 and the outer part of the lower insert 4, and the joint between the upper cover plate 2 and the lower insert 4 adopts an integral sealing (no gap is formed in most of the parts, as shown in figure 2) and local exhaust matching (a gap is formed in part, as shown in figure 3) structure. The inside of upper cover plate 2 forms rising head atmospheric pressure feeding district 3 and is not restricted to rising head atmospheric pressure feeding district 3 (use the rising head atmospheric pressure feeding district on upper strata to be main promptly, at the foundry goods rising head of lower floor filling district for assisting), the inside of inserts 4 forms foundry goods rising head filling district 5 and is not restricted to foundry goods rising head filling district 5 (use the foundry goods rising head filling district on lower floor to be main promptly, at the rising head atmospheric pressure feeding district on upper strata to assist), the department of meeting between upper cover plate 2 and the inserts 4 has the local exhaust zone 7 of the rising head filling type of a plurality of equipartitions (local equipartition clearance, if be hollow tubular then three clearances of equipartition).
The heat preservation feeding method adopted by the pneumatic heat preservation riser device is as follows: as shown in fig. 1, during the process of filling the upper mold of the casting, the aluminum liquid rises to the casting riser filling area 5 in the lower insert 4 and is in a full state, most of the air enters the riser air pressure feeding area 3 in the upper cover plate 2, and the peripheral air heat insulation area 6 is exhausted through the riser filling exhaust area 7 between the upper cover plate 2 and the lower insert 4, and the aluminum liquid cannot continue to rise after filling because the air in the riser air pressure feeding area 3 of the upper cover plate 2 cannot be exhausted; after the casting is filled and molded, the casting enters a solidification stage, air in the riser air pressure feeding area 3 expands due to temperature rise, so that pressure is generated to feed aluminum liquid in the casting riser filling area 5, and a good effect of air pressure type riser feeding is formed; the gas temperature in the air heat insulation and preservation area 6 formed between the outer parts of the upper cover plate 2 and the lower insert 4 and the upper die 1 of the die is close to the liquid temperature of aluminum metal, and the gas temperature loss is small in the process due to the fact that the gas temperature is in a closed state, so that a good riser heat preservation effect is formed.
As shown in fig. 2, the joint between the upper cover plate 2 and the lower insert 4 adopts an integral sealing fit type structure to ensure that when the casting is filled with the mold, most of the riser air pressure feeding area 3 in the upper cover plate 2 is filled with air and cannot be filled with aluminum liquid, and sometimes the aluminum liquid overflows the casting riser air pressure feeding area and enters the lower layer surface of the riser air pressure feeding area; as shown in fig. 3, the joint between the upper cover plate 2 and the lower insert 4 also adopts a local exhaust matching structure, a plurality of uniformly distributed riser mold filling exhaust areas 7 are designed in the matching area, and exhaust is performed to the outside through the riser mold filling exhaust areas 7 when a casting is molded, so that the casting riser mold filling area 5 of the lower insert 4 is filled with aluminum liquid, and a small amount of air is left on the upper layer surface in the casting riser mold filling area 5 sometimes. In the casting mold filling process, gas in the upper mold, the casting riser mold filling area and the riser gas pressure feeding area enters the air heat insulation and preservation area 6 through the riser mold filling and exhausting area 7, and the temperature of the gas in the air heat insulation and preservation area 6 is close to the liquid temperature of aluminum metal, so that the riser heat preservation effect is guaranteed.
According to the pneumatic heat-insulating riser device and the heat-insulating feeding method thereof: the upper cover plate 2 and the lower insert 4 are made of metal die steel (such as H13 steel) so as to ensure permanent long-term use.
Claims (2)
1. Vapour-pressure type heat preservation rising head device is including last mould (1), cope match-plate pattern (8), its characterized in that: an upper cover plate (2) is arranged on the top of the upper die (1) and close to the upper die plate, and a lower insert (4) is arranged on the upper die (1) and connected with the upper cover plate (2); an air heat insulation and preservation area (6) is formed between the upper die (1) and the outer part of the upper cover plate (2) and the outer part of the lower insert (4), and the joint between the upper cover plate (2) and the lower insert (4) adopts an integral sealing and local exhaust mutually-matched structure.
2. The air pressure type insulated feeder apparatus according to claim 1, wherein: the novel riser casting structure is characterized in that a riser air pressure feeding area (3) is formed inside the upper cover plate (2) and is not limited to the riser air pressure feeding area (3), a casting riser molding area (5) is formed inside the lower insert (4) and is not limited to the casting riser molding area (5), and a plurality of riser molding local exhaust areas (7) are arranged at the joint between the upper cover plate (2) and the lower insert (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020974620.6U CN212398080U (en) | 2020-05-23 | 2020-05-23 | Pneumatic heat-insulating riser device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020974620.6U CN212398080U (en) | 2020-05-23 | 2020-05-23 | Pneumatic heat-insulating riser device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212398080U true CN212398080U (en) | 2021-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020974620.6U Active CN212398080U (en) | 2020-05-23 | 2020-05-23 | Pneumatic heat-insulating riser device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212398080U (en) |
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2020
- 2020-05-23 CN CN202020974620.6U patent/CN212398080U/en active Active
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