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A control method for independently controlling the timing opening of runners in gating system

A gating system and independent control technology, applied in the field of casting, can solve problems such as limiting the degree of freedom of the process, reducing the yield of the process, increasing the difficulty of process design, etc., achieving the effect of large degrees of freedom and free and flexible runner design

Active Publication Date: 2018-09-14
芜湖市原本机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These measures increase the difficulty of process design, limit the degree of freedom of process, reduce the yield of process, and it is still difficult to solve the above problems in the application of multi-layer ingate in lost foam casting

Method used

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  • A control method for independently controlling the timing opening of runners in gating system

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Effect test

Embodiment 1

[0029] A ductile iron casting, the casting method is lost foam casting, and the gating system adopts the independent control runner timing opening gating system of the present invention, such as figure 1 The stepped gating system shown. The molten metal 7 is introduced into the cavity 6 through the sprue cup 1, the sprue 2, and the bottom-up ingate.

[0030] The pouring temperature is 1430°C, and the total filling time is designed to be 30 seconds. In order to realize the introduction of molten metal layer by layer in the inner runners of each layer of the stepped gating system, the method of independently controlling the timing opening of the runners described in the present invention is adopted:

[0031] Design the second-layer in-runner in the upper-layer in-runner to open 10 seconds after filling, and replace the bottom-layer in-runner to introduce molten metal. To achieve this purpose, a piece of eutectic cast iron spoiler with a thickness of 0.8mm is embedded in the se...

Embodiment 2

[0035] A ductile iron casting, the casting method is resin sand casting, using the independent control runner timing opening pouring system of the present invention, such as figure 1 The stepped gating system shown. The molten metal 7 is introduced into the cavity 6 through the sprue cup 1, the sprue 2, and the bottom-up ingate.

[0036] The pouring temperature is 1360°C, and the total filling time is designed to be 24 seconds. In order to realize the introduction of molten metal layer by layer in the inner runners of each layer of the stepped gating system, the method of independently controlling the timing opening of the runners described in the present invention is adopted:

[0037] The spoiler material is selected as eutectic aluminum-silicon alloy, and the predetermined melting time at 1360°C is 8 seconds. It is determined by experiments that its thickness should be 1.5mm.

[0038]The second-layer in-runner in the upper-layer in-runner is designed to open 8 seconds afte...

Embodiment 3

[0041] An aluminum-silicon alloy casting, the casting method is metal mold casting, and the pouring system adopts such as figure 1 The stepped gating system shown. The molten metal 7 is introduced into the cavity 6 through the sprue cup 1, the sprue 2, and the bottom-up ingate.

[0042] The pouring temperature is 1360°C, and the total filling time is designed to be 24 seconds. In order to realize the introduction of molten metal layer by layer in the inner runners of each layer of the stepped gating system, the method of independently controlling the timing opening of the runners described in the present invention is adopted:

[0043] The spoiler material is selected as eutectic aluminum-silicon alloy, and the predetermined melting time at 1360°C is 8 seconds. It is determined by experiments that its thickness should be 1.5mm.

[0044] The second-layer in-runner in the upper-layer in-runner is designed to open 8 seconds after the filling starts, and replace the bottom-layer ...

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Abstract

The invention discloses a control method capable of independently controlling on-time opening and closing of runners in a pouring system. The pouring system comprises a pouring cup, a straight runner, a horizontal runner, an inner runner and other runners; flow blocking pieces are arranged in part of the runners in advance. The flow blocking pieces are arranged in the runners, required to be controlled, in the pouring system firstly in advance, in the initial stage of the filling process, the flow blocking pieces block the runners, the effect of locking and closing the runners is achieved, after the preset melting breaking time, the flow blocking pieces are broken in a melting manner under the high-temperature effect of molten metal, the function of blocking the runners is lost, the runners are opened, and the function of independent on-time opening and closing of the runners in the pouring system is achieved.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a control method for independently controlling the timing opening of flow channels in a pouring system. Background technique [0002] In the casting process design, the gating system plays a role in smoothly and efficiently introducing the molten metal into the cavity, and its type and structure design are particularly important to the quality of the casting. Among them, in the stepped gating system with upper and lower multi-layer inner runners, the molten metal is injected into the cavity layer by layer from bottom to top, which has the advantages of top injection and bottom injection and makes up for their respective shortcomings. The stepped gating system has the advantages of stable mold filling and sequential solidification of castings, so it has been widely used in the process of tall castings. [0003] However, the structure of the stepped gating system is re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/08
CPCB22C9/082
Inventor 陈志浩朱协彬黄仲佳姚敏
Owner 芜湖市原本机械制造有限公司
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