CN211191881U - Heat-insulating riser for casting - Google Patents

Heat-insulating riser for casting Download PDF

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Publication number
CN211191881U
CN211191881U CN201922021289.6U CN201922021289U CN211191881U CN 211191881 U CN211191881 U CN 211191881U CN 201922021289 U CN201922021289 U CN 201922021289U CN 211191881 U CN211191881 U CN 211191881U
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China
Prior art keywords
casting
heat
feeding channel
riser
insulating
Prior art date
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Active
Application number
CN201922021289.6U
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Chinese (zh)
Inventor
张鹏
孟霞
谢书文
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Chongqing Changan Automobile Co Ltd
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Chongqing Changan Automobile Co Ltd
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Priority to CN201922021289.6U priority Critical patent/CN211191881U/en
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Abstract

The utility model discloses a heat-insulating riser for casting, which comprises a riser body, wherein the edge of the riser body, which is close to one end of a casting, extends towards the casting to form a feeding channel heat-insulating part; the feeding channel heat-insulating part is positioned on the periphery of the feeding channel of the casting. The utility model discloses can solve because of the not enough problem that causes the inside shrinkage cavity defect of foundry goods of feeding passageway.

Description

Heat-insulating riser for casting
Technical Field
The utility model belongs to the technical field of the gating system for aluminum alloy gravity casting, concretely relates to heat preservation rising head of casting usefulness.
Background
The key of aluminum alloy gravity casting is to solve the problem of sequential solidification, ensure that a gating system has an enough feeding channel, and if the feeding channel is insufficient, a local thermal node is formed inside a casting to cause shrinkage cavity defects, and the casting is scrapped when the shrinkage cavity defects are serious. At present, when a casting adopts a gravity casting process to design a riser, the requirement of sequential solidification can be met by designing according to an empirical formula or a modulus method, but some castings cannot design sufficient feeding channels due to structural limitation, so that the feeding channels are solidified when the casting is not completely solidified, and sequential solidification cannot be formed. As shown in fig. 1 and 2, when molten aluminum is poured into a cavity formed by a riser sand core 2 and a mold 4 to form a conventional riser 1 and a casting 5, and the feeding capacity of a feeding channel 6 is insufficient, the feeding channel 6 is solidified before other parts of the casting 5, so that the unsolidified parts of the casting 5 cannot be fed, and a shrinkage cavity 7 is formed in the casting 5. In order to solve the problems, the product structure is generally modified or the process patch is added to solve the problems, but the product performance is influenced by modifying the product structure, and the added process patch has the problem of difficulty in removal in the subsequent treatment process, so that the problems cannot be effectively solved.
Therefore, it is necessary to develop a new insulated feeder for casting.
Disclosure of Invention
The utility model aims at providing a heat preservation rising head of casting usefulness to solve the shrinkage cavity defect problem in the foundry goods.
The utility model relates to a heat-insulating riser for casting, which comprises a riser body, wherein the edge of the riser body, which is close to one end of a casting, extends towards the casting to form a feeding channel heat-insulating part; the feeding channel heat-insulating part is positioned on the periphery of the feeding channel of the casting.
Further, the feeding channel heat preservation part is of a circular cylindrical structure.
After the aluminum liquid is poured into the riser sand core, a part flowing into the mold cavity forms a casting, and the other part forms a heat-insulating riser. In the casting solidification process, the part far away from the heat-insulating riser is solidified firstly, and the heat-insulating part of the feeding channel formed by high-temperature molten aluminum around the feeding channel is used for insulating heat, so that the other parts of the casting are not solidified before solidification, and the sequential solidification required by the casting process is ensured. The shrinkage cavity exists in the last solidified part, namely the heat-insulating riser, and the heat-insulating riser needs to be removed in later processing, so that the defect of the shrinkage cavity in the casting is overcome.
The utility model has the advantages of it is following: for the casting with the narrow feeding channel, the temperature of the feeding channel can be increased under the condition that the product structure of the casting is not changed, so that the feeding channel is solidified after the casting is completely solidified, and the problem of the defect of shrinkage cavity in the casting caused by the insufficient feeding channel is solved.
Drawings
FIG. 1 is a schematic view of a prior art construction (including a casting);
FIG. 2 is a schematic view of a prior art riser gating system;
FIG. 3 is a schematic structural view of the insulated feeder of the present invention (including a casting);
FIG. 4 is a schematic view of the pouring system of the insulated riser of the present invention;
in the figure, 1-a conventional riser, 2-a riser sand core, 21-a positioning groove, 3-a parting line, 4-a mould, 41-a positioning key, 5-a casting, 6-a feeding channel, 7-a shrinkage cavity, 8-a heat-preservation riser and 81-a feeding channel heat-preservation part.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in FIG. 3, the insulated feeder for casting comprises a feeder body, wherein the peripheral edge of the feeder body close to the casting end extends towards the casting 5 to form a feeding channel insulated part 81; the feeding path heat-retaining portion 81 is located on the outer periphery of the feeding path 6 of the casting 5. In this embodiment, the feeding channel heat-insulating portion 81 has a circular cylindrical structure.
As shown in fig. 4, the positioning groove 21 is arranged on the riser sand core 2, the positioning key 41 correspondingly matched with the positioning groove 21 is arranged on the mold 4, the riser sand core 2 is placed on the mold 4 and fixedly connected with the positioning key 41 through the positioning groove 21, and the internal cavities of the riser sand core and the mold form the heat-insulating riser 8 and the casting 5 by poured aluminum liquid. In the process of casting 5 solidification, the part far away from the heat-preservation riser 8 is solidified firstly, and the heat preservation part 81 of the feeding channel formed by high-temperature molten aluminum around the feeding channel 6 is used for preserving heat, so that the part is not solidified before other parts of the casting 5 are solidified, and the sequential solidification required by the casting process is ensured. The shrinkage cavity 7 exists in the position of the last solidification, namely the heat-insulating riser 8, and the heat-insulating riser 8 needs to be removed in the later processing, namely the heat-insulating riser 8 is cut along the parting line 3, so that the shrinkage cavity defect in the casting 5 is solved.

Claims (2)

1. The utility model provides a heat preservation rising head of casting usefulness which characterized in that: the feeder comprises a feeder body, wherein the peripheral edge of one end of the feeder body, which is close to a casting (5), extends towards the casting (5) to form a feeding channel heat-insulating part (81); the feeding channel heat-preserving part (81) is positioned on the periphery of the feeding channel (6) of the casting (5).
2. The insulated feeder for casting according to claim 1, wherein: the feeding channel heat-insulating part (81) is of a circular cylindrical structure.
CN201922021289.6U 2019-11-21 2019-11-21 Heat-insulating riser for casting Active CN211191881U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922021289.6U CN211191881U (en) 2019-11-21 2019-11-21 Heat-insulating riser for casting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922021289.6U CN211191881U (en) 2019-11-21 2019-11-21 Heat-insulating riser for casting

Publications (1)

Publication Number Publication Date
CN211191881U true CN211191881U (en) 2020-08-07

Family

ID=71849932

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201922021289.6U Active CN211191881U (en) 2019-11-21 2019-11-21 Heat-insulating riser for casting

Country Status (1)

Country Link
CN (1) CN211191881U (en)

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