Method for casting piston blank with inner cooling path by liquid state extruding casting process

A squeeze casting and process technology, which is used in the field of piston blank manufacturing

Inactive Publication Date: 2007-04-11
SHANDONG BINZHOU BOHAI PISTON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can only be used to cast piston blanks without internal cooling channels by liquid squeeze casting, or to cast piston blanks with internal cooling channels by ordinary casting

Method used

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  • Method for casting piston blank with inner cooling path by liquid state extruding casting process
  • Method for casting piston blank with inner cooling path by liquid state extruding casting process
  • Method for casting piston blank with inner cooling path by liquid state extruding casting process

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Embodiment Construction

[0019] Further illustrate the present invention below in conjunction with accompanying drawing.

[0020] Described dissolvable core (4) is made by following method:

[0021] a. Grind table salt and corundum until they pass through a 80-120 mesh sieve, then heat to 450-550°C to remove water and other volatile impurities contained therein;

[0022] b. According to the ratio of 20-40 parts by weight of corundum and 60-80 parts by weight of table salt, mix them evenly;

[0023] c. Put the uniformly mixed raw materials into the mold and extrude them;

[0024] d. Carry out turning processing on the shape of the formed soluble core;

[0025] e. Send the processed soluble core into the roasting furnace for firing, and then take it out.

[0026] Through the above method, a soluble core with salt as a binder and corundum particles as a matrix can be prepared. After the piston blank is made, the oil inlet and outlet holes connected to the inner cavity of the piston are drilled at the...

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Abstract

The present invention is liquid extruding and casting process for casting piston blank with inner cooling path. The process includes the following steps: 1. making setting ring of wear resistant cast iron with connecting hook, and making soluble core with table salt and corundum and with lug; 2. fixing the setting ring through aluminizing treatment inside casting mold; 3. preheating the soluble core and fixing inside the setting ring; and 4. pouring aluminum alloy melt into the casting mold and pressurizing formation. The present invention has accurate locating of the soluble core inside the casting mold, and the machined piston blank has compact structure, high mechanical performance, high bearing capacity and excellent casting performance.

Description

technical field [0001] The invention provides a method for manufacturing a piston blank, in particular a method for manufacturing a piston blank with an internal cooling channel. Background technique [0002] At present, the engines for trucks, construction machinery, railway locomotives and ships are all developing towards high power and high load, the degree of strengthening is constantly increasing, and the emission requirements are becoming more and more stringent. Adding an internal cooling channel structure to the head of the piston of the engine can effectively reduce the temperature of the piston head and improve the performance of the engine. The liquid squeeze casting process can make the piston structure more dense and the mechanical performance higher. Therefore, combining the two will greatly improve the performance of the piston. The internal cooling channel is formed by casting the soluble core on the head of the piston blank, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D15/02
CPCB22D19/0027B22C9/108B22C9/105B22D17/24
Inventor 张国华孙晓高晓波赵士博刘延鹏王洪民马学军冯增建
Owner SHANDONG BINZHOU BOHAI PISTON
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