An environment-friendly graphite lubricating release agent

A technology of graphite lubrication and mold release agent, which is applied in the direction of cores, molds, and mold components. It can solve problems such as surface flow marks, affecting the fluidity of non-ferrous metal liquid, and casting dissatisfaction, and achieve good lubrication and mold release performance. The effect of low cost and simple preparation process

Active Publication Date: 2020-07-21
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] During the non-ferrous metal casting process, an oxide film may be formed on the surface of the molten non-ferrous metal injected into the metal mold, which affects the fluidity of the non-ferrous metal liquid, resulting in defects such as casting dissatisfaction and surface flow marks

Method used

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  • An environment-friendly graphite lubricating release agent
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  • An environment-friendly graphite lubricating release agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1, a water-based graphite lubricating release agent, its composition and weight ratio: 90.0wt% of various graphites with the same particle size, 0.02wt% of organic dispersants, and 9.97wt% of inorganic fillers. And the water-based mold release agent of the present invention and the prior art were diluted with water to 20.0wt% slurry respectively, and were used for the gravity casting experiment of copper parts after being fully stirred. Table 1 investigates the influence of different types of graphite on the demoulding effect, casting quality and mold surface state; figure 1 Diagram of release castings prepared with water-based graphite-lubricated release agents for different types of graphite.

[0036] Table 1

[0037] Example A Example B Example C Example D Graphite type Graphite tailings Microcrystalline graphite flake graphite artificial graphite casting surface condition smooth Sticky mold, spots flow marks, spots ...

Embodiment 2

[0039]Embodiment 2, a kind of water-based graphite lubricating release agent, its composition and weight percent are as shown in table 2, and water-based release agent of the present invention and prior art are diluted to 20% slurry respectively with water, fully After stirring, it is used for the gravity casting experiment of copper parts.

[0040] Table 2 investigates the influence of different dosages of graphite tailings on the demoulding effect, casting quality and mold surface state; figure 2 Diagram of release castings prepared with water-based graphite-lubricated release agents for different graphite tailing contents.

[0041] Table 2:

[0042]

[0043] Table 2 and figure 2 The results show that using the release agent of the present invention, when the proportion of graphite tailings in the release agent is 85-90wt%, the casting surface is smooth, the mold surface is flat, free of mold scale, and the release effect is optimal. Using the release agent of the pr...

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Abstract

The invention discloses an environment-friendly graphite lubricating releasing agent. According to the adopted technical scheme, graphite tailings for compounding artificial diamonds, an organic dispersing agent and at least one of following substances including cubic boron nitride, diamond micro-powder, carbon black, silicon dioxide and silicon dioxide with proper size distribution are adopted for preparing the graphite lubricating releasing agent for nonferrous metal casting. The environment-friendly graphite lubricating releasing agent has the advantages that the releasing agent has good lubricating releasing performance and meanwhile is low in cost and environment-friendly, and resource cyclic utilization is achieved.

Description

technical field [0001] The invention relates to a graphite lubricating release agent for non-ferrous metal casting. Background technique [0002] Graphite release agent is mainly composed of graphite, inorganic minerals, surfactants and water or mineral oil. Graphite is mainly artificial graphite, flake graphite and microcrystalline graphite. Graphite has good lubricity and mold release, good thermal and chemical stability, and good thermal insulation. Therefore, the graphite powder content in the graphite release agent generally accounts for more than 40-95%, which makes the cost of the graphite release agent relatively high, thereby limiting the application of the graphite release agent in non-ferrous metal casting. [0003] The water-based graphite lubricating release agent is easy to process and is widely used as a release agent for non-ferrous metal casting. When the water-based graphite lubricating release agent acts on the surface of a metal mold for casting, most ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 陈石林陈林
Owner HUNAN UNIV
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