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Hot core box structure of precoated sand mold for manufacturing sand core

A technology of hot core box and coated sand, applied in casting and molding equipment and other directions, can solve the problem of non-forming of the thick and weak parts of the sand core, and achieve the effect of small impact on production and quality, reducing the probability of sand core collapse, and high hardness.

Pending Publication Date: 2022-03-08
DONGFENG AUTOMOBILE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of thick sand cores and weak parts not forming in the prior art, and to provide a coated sand mold for manufacturing sand cores that uses beryllium copper inserts to optimize the forming effect without prolonging the curing time Hot box structure

Method used

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  • Hot core box structure of precoated sand mold for manufacturing sand core
  • Hot core box structure of precoated sand mold for manufacturing sand core
  • Hot core box structure of precoated sand mold for manufacturing sand core

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A coated sand mold hot core box structure for manufacturing sand cores, the hot core box structure includes: a mold core box 1, a mold cavity 2 is opened inside the mold core box 1, and the mold core box 1 is provided with a beryllium copper insert 11, one end of the beryllium copper insert 11 is flush with the outer plane of the mold core box 1, and the other end of the beryllium copper insert 11 is in line with the inner surface of the mold cavity 2 match.

[0042] The beryllium-copper insert 11 is arranged on the top and / or bottom plane of the cavity height greater than or equal to 4 cm in the mold cavity 2 .

[0043] The beryllium copper insert 11 is arranged in a thin-walled area or an annular thin-walled area of ​​the mold cavity 2, the wall thickness of the thin-walled area is less than 8 mm, and the wall thickness of the annular thin-walled area is less than 10 mm.

[0044] The beryllium copper insert 11 is arranged in the cavity area of ​​the mold cavity 2 wit...

Embodiment 2

[0047] Embodiment 2 is basically the same as Embodiment 1, and its difference is:

[0048] The sand-shooting hole 12 is matched with the sand-shooting nozzle of the film-coated sand core making machine.

[0049] The mold core box 1 is provided with multiple sets of heating couples 13 , a single set of heating couples 13 is set up and down, and a single heating couple 13 is set through the mold core box 1 .

[0050] The beryllium copper insert 11 is made of QBe2 beryllium copper alloy material.

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Abstract

The hot core box structure of the precoated sand mold for manufacturing the sand core comprises a mold core box, a mold cavity is formed in the mold core box, a beryllium copper insert is arranged in the mold core box, one end of the beryllium copper insert is flush with the outer plane of the mold core box, and the other end of the beryllium copper insert is connected with the mold cavity. And the other end of the beryllium copper insert is matched with the internal molded surface of the mold cavity. According to the design, the curing effect can be stably improved, the sand core collapsing probability is effectively reduced, maintenance is easy, and mold loss is reduced.

Description

technical field [0001] The invention relates to a film-coated sand mold hot core box structure for manufacturing sand cores, which is particularly suitable for improving the solidification and molding effect of sand cores. Background technique [0002] In the engine casting process, sand cores are needed, and the production quality of the sand cores directly affects the casting quality of the engine and the amount of post-processing. [0003] During the hot core box core making process, some sand cores are complex in structure, hypertrophic or difficult to solidify at positions far from the nozzle, and the sand cores are easy to collapse after being taken out; [0004] The usual solution to this kind of problem is to increase the heating temperature of the core box, prolong the curing time, or add a heating needle at a position that is not easy to cure. The above solutions will not only solve the problem of sand core curing, but also increase energy consumption and reduce th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C7/06
CPCB22C7/06
Inventor 周程鹏梁雷林浩张凤丽
Owner DONGFENG AUTOMOBILE COMPANY