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Feeder element for metal casting

A metal casting and feeder technology, which is applied to the parts of molding machines, casting molding equipment, metal processing equipment, etc., can solve problems such as casting defects, cracks, and feeder sleeve damage

Inactive Publication Date: 2009-06-24
FOSECO INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in making this attempt, the inventors have surprisingly found that the feeder sleeve suffers damage and cracks on the mold which, if used in castings, would cause the casting to suffer from defects

Method used

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  • Feeder element for metal casting
  • Feeder element for metal casting
  • Feeder element for metal casting

Examples

Experimental program
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Effect test

Embodiment Construction

[0055] In the examples that follow, trials (or tests) included a standard feeder system with a standard feeder component of a standard feeder sleeve and a feeder system according to the invention. Both standard and inventive feeder components are made from pressed or stamped steel sheets. The bottom (or base) of the feeder sleeve of the present invention is profiled either by manufacturing the sleeve with the profile already in place (flat top arched sleeve) or by using sandpaper on a standard sleeve (6 / 9K shaped sleeve) to realise. When manufacturing commercially formed 6 / 9K shaped feeder sleeves, it should be understood that it is more feasible to produce feeder sleeves with the contour already in place.

[0056] molding test

[0057]Tests were performed on a commercially available Herman molding machine using a clay-bonded green sand system. The wooden formwork is bolted to the steel plates. The four feeder parts and corresponding feeder sleeves were then mounted to the...

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Abstract

The present invention provides a feeder component used in metal casting, which comprises the following components: (i) a first end which is used for being installed on the molded foundry mould; (ii) an opposite second end which is used for accommodating the feeder sleeve; and (iii) a hole which is restrained by the step-shaped side wall and is positioned between the first end and the second end. The feeder component is condensable in using thereby reducing the distance between the first end and the second end, wherein the step-shaped side wall is provided with a first side wall area and a second side wall area. The first side wall area limits the second end of component and an installation surface (54) which is used for the feeder sleeve in using. The first side wall area inclines with an angle less than 90 DEG relatively to the axial line of hole. The second side wall area is adjacent with the first side wall area, and inclines parallelly with the axial line of hole or with an angle different from the first side wall area relatively to the axial line of hole thereby limiting step in the side wall. The feeder component provides an improvement of component disclosed in the patent document WO 2005 / 051568.

Description

technical field [0001] The present invention relates to an improved feeder assembly for use in metal casting operations using casting moulds, particularly, but not exclusively, in medium pressure sand molding systems. Background technique [0002] In a typical casting process or process, molten metal is poured into a preform cavity that defines the shape of the casting. However, as the metal solidifies it shrinks, resulting in shrinkage cavities which in turn lead to unacceptable defects in the final casting. This is a well known problem in the foundry industry and is solved by using feeder sleeves or risers that are integrated into (or integrated into) the mold during its formation. Each feeder sleeve provides an additional (usually closed) volume or cavity in communication with the mold cavity so that molten metal also enters the feeder sleeve. During solidification, the molten metal in the feeder sleeve flows back into the mold cavity to compensate for the shrinkage of ...

Claims

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Application Information

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IPC IPC(8): B22C9/08
CPCB22C9/084B22C9/088B22C19/00B22C9/08
Inventor T·L·塔卡贝里P·R·达尔斯特伦A·C·米德亚C·波韦尔
Owner FOSECO INT LTD
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