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Gypsum mold for ceramic grouting molding and preparation method thereof

A technology for grouting molding and plaster mold, applied in the field of ceramic molds, can solve the problems of shortening the service life of plaster molds, reducing strength, weakening, etc., and achieving low cost, improving corrosion resistance and wear resistance, and increasing service life. Effect

Active Publication Date: 2020-09-01
SHANGHAI JUNBO COMPOSITE MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ceramic mold gypsum has been in a complex and humid mud environment for a long time. When the gypsum mold encounters ceramic mud, water molecules and electrolytes will invade the capillary pores of the gypsum mold to weaken the force between the gypsum crystal particles, resulting in part of the dihydrate gypsum due to dissolution, Dissolution causes local collapse and damage, reduces its strength, and ultimately shortens the service life of the plaster mold

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Raw materials (parts by weight) for plaster molds for ceramic grouting: 100 parts of gypsum powder, 0.3 parts of fiber reinforcing agent, 0.05 parts of water-retaining agent, and 70 parts of water.

[0042] The gypsum powder is made by mixing α-gypsum and β-gypsum, and the mass ratio of the α-gypsum and β-gypsum is 30:70.

[0043] The fiber reinforcement is polypropylene fiber.

[0044] The water-retaining agent is polyethylene glycol.

[0045] The preparation method of the gypsum mold used for ceramic grouting molding comprises the following steps:

[0046] (1) Weigh the water-retaining agent and water in parts by weight, add the water-retaining agent into the water, stir at 70°C at 200 rpm for 30 minutes, and naturally cool to room temperature to obtain a water-retaining agent solution;

[0047] (2) Weigh gypsum powder and fiber reinforcing agent by weight, mix them evenly to obtain mixed powder, add the mixed powder to the water-retaining agent solution while stirr...

Embodiment 2

[0051] Raw materials (parts by weight) for plaster molds for ceramic grouting: 100 parts of gypsum powder, 0.3 parts of fiber reinforcing agent, 0.05 parts of water-retaining agent, 0.15 parts of inorganic additives, and 70 parts of water.

[0052]The gypsum powder is made by mixing α-gypsum and β-gypsum, and the mass ratio of the α-gypsum and β-gypsum is 30:70.

[0053] The inorganic additive is silicon nitride.

[0054] The fiber reinforcement is polypropylene fiber.

[0055] The water-retaining agent is polyethylene glycol.

[0056] The preparation method of the gypsum mold used for ceramic grouting molding comprises the following steps:

[0057] (1) Weigh the water-retaining agent and water in parts by weight, add the water-retaining agent into the water, stir at 70°C at 200 rpm for 30 minutes, and naturally cool to room temperature to obtain a water-retaining agent solution;

[0058] (2) Weigh gypsum powder, fiber reinforcing agent, and inorganic additives by weight, a...

Embodiment 3

[0062] It is basically the same as Example 2, except that the fiber reinforcing agent is carbon fiber.

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Abstract

The invention discloses a gypsum mold for ceramic casting molding and a preparation method thereof. The gypsum mold for ceramic casting molding comprises the following raw materials by weight: 95-105parts of gypsum powder, 0.1-0.5 part of a fiber reinforcing agent, 0.01-0.1 part of a water-retaining agent, and 65-75 parts of water. According to the gypsum mold for ceramic casting molding and thepreparation method thereof provided by the invention, the process is simple and the cost is low, the obtained gypsum mold for ceramic casting molding has good strength and water absorption performance, the corrosion resistance and wear resistance of the gypsum mold can be improved, and the service life of the gypsum mold is increased.

Description

technical field [0001] The invention belongs to the technical field of ceramic moulds, and in particular relates to a gypsum mold for ceramic grouting molding and a preparation method thereof. Background technique [0002] With the development of military weapons in the direction of high-end, precision and cutting-edge, the cost of military weapons is getting higher and higher, and the high cost restricts mass production and application. Therefore, reducing the cost of military weapons has become an inevitable trend. The radome is a component used to protect the antenna inside the hood to work normally in harsh environments. At present, anti-radiation missiles require that the radome material must pass through electromagnetic waves at a wide frequency. In order to obtain broadband wave-transmitting performance of the radome, on the one hand, it is necessary to use a dielectric material with extremely low dielectric constant and extremely small dielectric loss, and on the ot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B16/06C04B14/38B28B7/00B28B1/14B28B11/24
CPCB28B1/14B28B7/00B28B11/247C04B14/386C04B16/0633C04B28/14C04B2201/50C04B24/32C04B22/002C04B14/328
Inventor 胡江峰
Owner SHANGHAI JUNBO COMPOSITE MATERIALS TECH CO LTD