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Method for casting piston ring by use of iron type sand coating cylinder

A sand-coated iron mold and piston casting technology, which is applied to casting molding equipment, casting molds, cores, etc., can solve the problems of large blank machining allowance and heavy cleaning workload of castings, and achieve good overall surface quality and clean work. Small amount, good mechanical properties

Active Publication Date: 2013-11-20
GUANGXI YULIN LANGTAI AUTO PARTS
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  • Abstract
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Problems solved by technology

[0003] At present, the casting methods of piston rings include single-piece ellipse casting, double-piece ellipse casting and cylinder casting. Compared with the other two casting methods, the cylinder casting method has high yield and high production efficiency, and is suitable for mass production. However, cylinder casting The casting cleaning workload of the method is large, and the blank machining allowance is large

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  • Method for casting piston ring by use of iron type sand coating cylinder
  • Method for casting piston ring by use of iron type sand coating cylinder
  • Method for casting piston ring by use of iron type sand coating cylinder

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Embodiment Construction

[0021] The present invention will be further described below with reference to the accompanying drawings and in combination with specific embodiments, so that those skilled in the art can implement it according to the description. The protection scope of the present invention is not limited to the specific embodiments of the present invention.

[0022] The invention discloses a method for casting a piston ring with an iron-type sand-covered cylindrical body. The technological steps include: mold manufacturing, molding, core setting, box closing, pouring, box opening, casting cleaning and machining. Produce piston rings with a specification of Φ105mm according to the above process steps, and conduct corresponding inspections on castings and finished piston rings.

[0023] 1. Mold manufacturing

[0024] The mold plate 6 is manufactured according to the cylinder blank of the piston ring, the plate 6 is divided into upper and lower plates, the upper and lower plates are symmetrica...

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Abstract

The invention discloses a method for casting a piston ring by use of an iron type sand coating cylinder, which comprises the following steps of mould manufacturing, moulding, core settling, box closing, pouring, box opening, casting cleaning and machining, wherein the moulding is iron type sand coating moulding; the thickness of the sand coating layer of the iron type sand coating is 6-8mm; the poured molten iron comprises 3.6-3.9% of C, 1.9-2.2% of Si, 0.4-0.6% of Mn, less than 0.05% of P and less than 0.05% of S; the pouring temperature is 1,380-1,400 DEG C; the pouring time is 23-28 seconds; and a riser is not required for pouring. By adopting the method disclosed by the invention, the produced piston ring meets the performance requirements and has the advantages of high dimensional accuracy of the casting, small working allowance, high yield of the casting, high production efficiency and the like.

Description

technical field [0001] The invention relates to a method for casting a piston ring with a cylindrical body, in particular to a method for casting a piston ring with an iron mold covered with sand in a cylindrical body. Background technique [0002] Iron mold sand-covered casting refers to a casting process in which a thin layer of sand is covered in the inner cavity of the metal mold to form a casting mold. It has the casting characteristics of metal mold and shell mold. Iron mold sand-coated casting has been widely used in crankshafts. , wear-resistant valve body, cylinder liner and wear-resistant tooth plate and other castings, but it has not been specifically applied to the casting of piston rings. [0003] At present, the casting methods of piston rings include single-piece ellipse casting, double-piece ellipse casting and cylinder casting. Compared with the other two casting methods, the cylinder casting method has high yield and high production efficiency, and is suita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02B22C15/23B22C9/24
Inventor 罗胜生韦明发王冲赖勇黄林
Owner GUANGXI YULIN LANGTAI AUTO PARTS
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