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Method for manufacturing sand coated shell type bronze composite casting valve plate

A compound casting and tin bronze technology, which is applied in the direction of casting molding equipment, casting molds, cores, etc., can solve the problems of undisclosed compound casting process system, etc., achieve the effect of shortening the pouring time, accurately controlling the temperature difference, and solving the problem of fixing

Inactive Publication Date: 2015-08-26
海安铸鑫金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent application did not disclose the specific process system of the composite casting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment relates to a preparation method of a sand-covered shell-type tin-bronze composite casting valve plate. The preparation method consists of the following steps:

[0019] Step 1: Take the coated sand and inject it into the mold cavity of the valve plate, keep warm to make the coated sand solidify and form, and then remove the mold to obtain the coated sand shell; the injection uses a sand shooting machine, and the pressure of the sand shooting machine is controlled as 0.7Mpa; the temperature of the sand shooting machine is controlled at 205°C; the number of times the sand shooting machine shoots sand is 4 times, and the interval between each sand shooting is 4 seconds; before injecting into the valve plate cavity, the valve plate cavity is heated until the temperature is 175°C; the heat preservation is specifically: keep the temperature at 186°C for 15 seconds; the valve plate mold cavity is provided with an inner core that cooperates with the copper sleeve;...

Embodiment 2

[0025] This embodiment relates to a preparation method of a sand-covered shell-type tin-bronze composite casting valve plate. The preparation method consists of the following steps:

[0026] Step 1: Take the coated sand and inject it into the mold cavity of the valve plate, keep warm to make the coated sand solidify and form, and then remove the mold to obtain the coated sand shell; the injection uses a sand shooting machine, and the pressure of the sand shooting machine is controlled as 1.0Mpa; the temperature of the sand shot machine is controlled at 225°C; the number of sand shot by the sand shot machine is 4 times, and the interval between each sand shot is 5 seconds; before injecting into the valve plate cavity, the valve plate cavity is heated until the temperature is 185°C; the heat preservation is specifically: keep the temperature at 195°C for 25 seconds; the valve plate mold cavity is provided with an inner core that cooperates with the copper sleeve;

[0027] Step 2...

Embodiment 3

[0032] This embodiment relates to a preparation method of a sand-covered shell-type tin-bronze composite casting valve plate. The preparation method consists of the following steps:

[0033]Step 1: Take the coated sand and inject it into the mold cavity of the valve plate, keep warm to make the coated sand solidify and form, and then remove the mold to obtain the coated sand shell; the injection uses a sand shooting machine, and the pressure of the sand shooting machine is controlled as 0.8Mpa; the temperature of the sand shooting machine is controlled at 220°C; the number of times the sand shooting machine shoots sand is 4 times, and the interval between each sand shooting is 4 seconds; before injecting into the valve plate cavity, the valve plate cavity is heated until the temperature is 180°C; the heat preservation is specifically: keep the temperature at 190°C for 20 seconds; the valve plate mold cavity is provided with an inner core that cooperates with the copper sleeve; ...

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Abstract

The invention provides a method for manufacturing a sand coated shell type bronze composite casting valve plate. The method for manufacturing the sand coated shell type bronze composite casting valve plate is composed of following steps that firstly, a precoated sand injection valve plate die cavity is taken, and is kept arm, precoated sand is molded in a curing manner, stripping is carried out, and a sand coated shell type is obtained; secondly, a copper sleeve is fixed to an inner core of the sand coated shell type, and then, mould assembling and vertical clamping are carried out so as to form a casting cavity, wherein the copper sleeve is made of tin bronze, and the tin bronze comprises tin smaller than or equal to 13 percent and phosphorus smaller than or equal to 0.2 percent; thirdly, molten iron is taken, and then the molten iron is poured into the casting cavity to obtain a casting; fourthly, the casting is taken to be cooled, blasting finishing is carried out, and the sand coated shell type bronze composite casting valve plate is obtained. According to the method for manufacturing the sand coated shell type bronze composite casting valve plate, the yield of composite castings can reach more than 95 percent. The technical problem of long-existing in mass production in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a preparation method of a sand-covered shell-type tin-bronze composite casting valve plate. Background technique [0002] Coated sand is suitable for the production of complex and precise castings with high requirements, such as automobile engine cylinder blocks, etc. Coated sand can effectively eliminate various casting defects such as deformation and thermal cracking during the casting process, and the prepared casting surface It is smoother and more accurate in size, which can shorten the production cycle, save metal raw materials, reduce production costs, and it is easy to use automation in the production process to reduce the use of labor. The coated sand process is especially suitable for mass production of various small and medium-sized castings. [0003] Shell casting is a new type of casting process derived from the coated sand process. Specifically, it uses ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02B22C9/22B22C13/08
CPCB22C9/02B22C9/22B22C13/08
Inventor 顾文元
Owner 海安铸鑫金属制品有限公司
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