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Metal mold gravity casting process for automobile intake pipe

A technology of gravity casting and metal mold, which is applied in the field of casting of mechanical parts, can solve the problems of low mold productivity, inconvenient clamping and disassembly, high mold cost, etc., and achieve the effects of improving pass rate, reducing air holes, and simple operation

Inactive Publication Date: 2013-09-18
张志平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are many kinds of production processes for automobile aluminum alloy parts, such as high-pressure casting, low-pressure casting, investment casting, etc. The casting molds and corresponding equipment are different, so the processes used are also different; the high-pressure casting has special effects on the mold. The design requirements must be matched with the design of the machine. For some parts with complex shapes, the design of the mold is correspondingly complicated. The model surface of the mold is required to withstand high pressure, so the model surface must undergo a special heat treatment process before it can be used for production. The factor of rapid prototyping makes the mold must increase the internal water cooling channel to ensure that the mold can be used normally under high pressure and high speed. Uninterrupted spraying of release agent is necessary during production to achieve fast and smooth release effect
Due to the particularity of its equipment, the mold gate of low-pressure casting is usually set at the bottom of the casting. The use of the mold must be realized by the cooperation of at least 2-3 people. It is inconvenient to clamp and disassemble. Low-pressure casting is easy to make the inner cavity of the casting rough due to pressure, which does not meet the requirements of the process
The mold structure design of investment casting is scattered, and its production is completely completed by manual operation. Therefore, its mold productivity is low, and it is not suitable for the manufacture of large-scale, large-volume, and complex-shaped castings, and it is difficult to automate mold production

Method used

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  • Metal mold gravity casting process for automobile intake pipe
  • Metal mold gravity casting process for automobile intake pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, taking the sand core casting of the intake pipe CH001 as an example to illustrate the gravity casting process of the metal mold.

[0020] (1) Mold preheating 1: separate the upper mold 2 and the lower mold 5 of the metal mold and place the heater on the surface of the upper mold 2 and the lower mold 5, bake and preheat to 230 degrees, pour the pot 3 and pour Pots 4 are preheated together.

[0021] (2) Mold spraying: Use dry sand and compressed air to blow out the preheated upper mold 2 and lower mold 5 with an air gun to clean the mold cavity surface. After the mold is cooled to 180°C, spray the coating agent on the metal surface. On the mold, the paint and water are mixed according to the volume ratio of 1:3, and the inner cavity is sprayed to a thickness of 100 microns, and the thickness of the pouring basin 3, the sprue and the riser is increased to 330 microns, and the inner cavity needs to be cooled quickly. Molybdenum disulfide is used to smear the ...

Embodiment 2

[0027] Embodiment 2, taking the casting of steering pump JV348 with sand core as an example to illustrate the metal mold gravity casting process.

[0028] (1) Mold preheating 1: separate the upper mold 2 and the lower mold 5 of the metal mold and place the heater on the surface of the upper mold 2 and the lower mold 5, bake and preheat to 250 degrees, pour the pot 3 and pour Pots 4 are preheated together.

[0029] (2) Mold spraying: Use dry sand and compressed air to blow out the preheated upper mold 2 and lower mold 5 with an air gun to clean the mold cavity surface. After the mold is cooled to 200°C, spray the coating agent on the metal surface. On the mold, the paint and water are mixed according to the volume ratio of 1:5, and the inner cavity is sprayed to a thickness of 120 microns, and the thickness of the pouring basin 3, runner and riser is increased to 350 microns, and the inner cavity needs to be cooled quickly. Molybdenum disulfide is used to smear the parts of th...

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Abstract

The invention provides a metal mold gravity casting process for an automobile intake pipe, which belongs to the technical field of casting methods for machine parts. The process comprises the following processing steps: (1) preheating of a mold to a temperature of 200 to 250 DEG C; (2) spraying: a step of cleaning the mold and spraying or bushing T11 on the metal mold; (3) purification of molten aluminum: a step of heating the molten aluminum to a temperature of 700 DEG C, blowing in argon by using an air stripping machine so as to purify the molten aluminum and scooping all the floating impurities by using a colander; (4) preheating of the mold: a step of preheating a sprayed upper mold (2) and a sprayed lower mold (5) to a temperature of 300 to 350 DEG C; (5) casting: scooping and putting the molten aluminum to a left casting basin (3) and a right casting basin (4) of the mold by using a spoon and allowing a machine to flip vertically; (6) cooling: a step of flipping the machine until the machine is horizontal; and (7) demolding: a step of flipping the machine until the machine is vertical, opening the upper mold (2) and the lower mold (5) and ejecting a casting out from a cavity of the lower mold (5) by using a thimble. With the process provided by the invention, high production efficiency and a long service life of the mold are obtained; and the process is applicable to mass production of parts.

Description

technical field [0001] The invention belongs to the technical field of casting methods for mechanical parts, and in particular relates to a metal mold gravity casting process for an automobile intake pipe. Background technique [0002] At present, there are many kinds of production processes for automobile aluminum alloy parts, such as high-pressure casting, low-pressure casting, investment casting, etc. The casting molds and corresponding equipment are different, so the processes used are also different; the high-pressure casting has special effects on the mold. The design requirements must be matched with the design of the machine. For some parts with complex shapes, the design of the mold is correspondingly complicated. The model surface of the mold is required to withstand high pressure, so the model surface must undergo a special heat treatment process before it can be used for production. The factor of rapid prototyping makes the mold must increase the internal water c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/06B22C9/24B22C3/00B22D21/04F02M35/104
Inventor 张志平
Owner 张志平
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