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Ceramic impeller gelcasting die and manufacturing method thereof

A technology of gel injection molding and manufacturing method, applied in the field of mold manufacturing, can solve the problems of reduced yield, poor appearance quality, and difficulty in demoulding an impeller blank, and achieves low cost, convenient demoulding, and good appearance quality. Effect

Pending Publication Date: 2017-08-01
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The impeller mold is made of metal materials, and the metal surface is easily corroded by the acid-base medium in the slurry. After the slurry is gelled, the impeller body is easy to stick to the metal surface, which makes it difficult to demould the impeller body, and the appearance quality is poor. rate reduction

Method used

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  • Ceramic impeller gelcasting die and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] to combine figure 1 Example 1 is illustrated. The whole set of inventive device is composed of outer film 1, mold core stator 2, mold core 3 and anti-sticking coating 4, wherein outer film 1 includes upper die ring 1-1, middle ring 1-2, lower die ring 1-3 and bases 1-4. The mold core is the impeller mold core 3 to be poured. The impeller mold core 3 is installed in the outer mold cavity 5, and is fixed in the center of the outer membrane cavity 5 by the core stator. The outer membrane cavity 5 is divided into an upper mold cavity 5-1 and a lower mold cavity 5-2, wherein the upper mold cavity 5-1 is composed of an upper mold ring 1-1, an intermediate ring 1-2 and a core side 3- 2, the lower mold cavity 5-2 is composed of a base 1-4, a lower mold ring 1-3, an intermediate ring 1-2 and a mold core front 3-1 (including one side of the blade). The anti-sticking coating is applied on the surfaces of the impeller core 3, the core stator 2 and the outer membrane inner cavity...

Embodiment 2

[0042] The difference between this embodiment and Embodiment 1 is that the coating thickness of the anti-stick coating is 10 μm, and the thinnest part of the outer film is not less than 2 mm, and the pouring material is gypsum slurry. As a result of the implementation, a mold for gel injection molding of a ceramic impeller made of gypsum was obtained.

Embodiment 3

[0044] The difference between this embodiment and embodiment 1 is that the coating thickness of the anti-stick coating is 100 μm, and the thinnest part of the outer film is not less than 7 mm, and the pouring material is epoxy resin. As a result of the implementation, a mold for gel injection molding of a ceramic impeller made of epoxy resin was obtained.

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Abstract

The invention provides a ceramic impeller gelcasting die and a manufacturing method thereof. A series of inorganic material dies, organic material dies and organic-inorganic composite material dies which are not prone to being in adhesion with ceramic slurry can be manufactured. By means of the ceramic impeller gelcasting die and the manufacturing method, adhesion of a blank body, the surface of an inner cavity of an outer die and the surface of a die core can be avoided, the appearance quality of the blank is guaranteed, and die core demolding is facilitated; and meanwhile, the die weight and production cost are reduced, and the production efficiency is improved; blank demolding is more convenient and flexible, in addition, after blank demolding, the appearance quality is good, a base in the outer die has a supporting effect on the overall set of device, leaked liquid outflow can be prevented; and in addition, carrying and inversing are convenient, and liquid level balancing during pouring is better achieved. The ceramic impeller gelcasting die and the manufacturing method can be widely applied to pouring of ceramic impeller dies for gelcasting dies made of various materials.

Description

technical field [0001] The invention belongs to the technical field of mold manufacturing, and in particular relates to a mold for gel injection molding of a ceramic impeller and a manufacturing method thereof. Background technique [0002] Chemical, petroleum and nuclear power plants often need to pump high temperature, strong acid and alkali solutions in or out, and there is an urgent need for impeller pumps that are resistant to high temperature, strong acid and alkali corrosion, and wear. Pressureless sintered silicon carbide is a good structural ceramic, which has the characteristics of high hardness, high thermal conductivity, high thermal shock performance, wear resistance, and good chemical corrosion resistance. It is a very ideal corrosion-resistant and wear-resistant Damage, high temperature resistant centrifugal pump impeller manufacturing materials. However, ceramic materials are difficult to machine after sintering. How to prepare large-size pump impellers that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/38B29C33/56B29C33/76
CPCB29C33/38B29C33/56B29C33/76
Inventor 燕青芝赵占冲李县辉
Owner UNIV OF SCI & TECH BEIJING
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