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Casting method of tabular spheroidal iron piece and casting system thereof

A pouring system and pouring method technology are applied in the pouring system of plate-shaped ductile iron parts and the field of pouring of plate-shaped ductile iron parts, which can solve the problems of easy occurrence of cold insulation, unbalanced mechanical properties of castings, differences in metallographic structure of castings, etc. , to achieve the effect of prolonging the pouring time, good slag blocking effect and uniform metallographic structure

Inactive Publication Date: 2008-11-12
鑫工艺(上海)材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The liquid metal fills the mold from bottom to top, which is conducive to the discharge of gas in the cavity. However, the plate-shaped ductile iron part is a thin-walled casting, and the cross-sectional area of ​​the ingate 8 is small, especially during the filling process. The lower part of the casting is constantly entering Surrounded by high-temperature molten metal, the relative temperature of the molten metal filling the upper part 10 of the casting is relatively low, which makes the upper 10 parts of the casting prone to cold shut defects, and the temperature difference between the upper and lower parts is likely to cause differences in the metallographic structure of the casting, resulting in The mechanical properties of the whole casting are not balanced

Method used

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  • Casting method of tabular spheroidal iron piece and casting system thereof
  • Casting method of tabular spheroidal iron piece and casting system thereof
  • Casting method of tabular spheroidal iron piece and casting system thereof

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Effect test

Embodiment 1

[0035] Such as image 3 As shown, the large planes of a group of 6 plate-shaped ductile iron parts 1 are placed vertically and parallel, and each casting is spaced at a certain distance 13 to ensure sufficient sand consumption. The runner 4 is placed on the side of the top 14 of the casting group, and the blank holder gate 11 formed has a blank holder width of 2 to 3 mm. The runner 4 is provided with a sprue 3 and a sprue cup 2. When pouring The molten metal enters the cavity through the sprue cup 2, the sprue 3, the runner 4 and the edge gate 11, goes down along the wall, and then completes the stable filling from the bottom to the top, forming a unilateral serial group of castings. Vents 12 are respectively provided on the other side of the top of each casting to facilitate smooth exhaust during the pouring process.

Embodiment 2

[0037] Such as Figure 4 As shown, the large planes of a group of 5 pieces of plate-shaped ductile iron parts 1 are placed vertically and parallel. On the basis of the first embodiment, another group of 5 pieces of plate-shaped ductile iron parts are placed symmetrically at the bottom of the runner 4 , and form the edge gate 11 on the other side. When pouring, the molten metal enters the cavity through the sprue cup 2, the sprue 3, the runner 4 and the edge gates 11 on both sides, and flows down the wall, and then The smooth filling is completed from bottom to top, and the exhaust is exhausted through the air outlet hole 12, finally forming a group of castings with two sides connected in series.

[0038] In the above embodiment, each group of plate-shaped nodular iron pieces placed in parallel may also contain other numbers of plate-like nodular iron pieces, but generally each group does not exceed 10 pieces, because too many pieces will also cause defects such as insufficient...

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Abstract

The invention discloses a pouring method and a pouring system used for a plate-shaped ball iron casting. The method adopts a sand casting technique; the pouring system comprises a sprue cup, a sprue, a horizontal runner and a plurality of plate-shaped castings; the method adopts a type that the large plane of the plate-shaped casting is vertically arranged in parallel; the horizontal runner and the plate-shaped casting form a narrow seam edge gate so as to lead the molten steel to flow in along the wall and be stably filled from bottom to top during the pouring process. When the method and the pouring system of the invention are adopted, the molten steel is filled along the wall during the pouring process and the metal is sequentially solidified from bottom to top, thus ensuring the uniformity and consistency of the metallographic structure of the plate-shaped ball iron casting; furthermore, by the narrow seam edge gate, the pouring time is prolonged, the shrinkage compensation effect is provided during the pouring process, furthermore, the slag retaining effect is good and the defects such as slag inclusion, sand inclusion, etc. are avoided; the plate-shaped ball iron casting pouring system of the invention has reasonable and simple structure, saves the metal and has high process yield; furthermore, the pouring system is convenient to be removed; the casting adopts serial pouring, thus having small land occupying and high production efficiency.

Description

technical field [0001] The invention relates to a pouring method, in particular to a pouring method for a plate-shaped ductile iron piece; [0002] The invention also relates to a gating system, in particular to a gating system for plate-shaped ductile iron pieces. Background technique [0003] The gating system is the channel through which the liquid metal in the mold flows into the cavity. The gating system of general iron castings is mainly composed of four parts: sprue cup, sprue, runner and inner runner. A reasonable gating system is very important to ensure the quality of castings. [0004] For plate-shaped ductile iron pieces with a length of 100-300mm, a width of 50-100mm, and a thickness of 5-15mm, although the shape is simple, since the casting is directly used in the as-cast state without heat treatment, the metallographic structure is required to be uniform and free from penetration. Carbon and other inclusions are included to ensure that the mechanical proper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D35/04
Inventor 朱筠於有根周联山
Owner 鑫工艺(上海)材料科技有限公司
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