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Mold release agent for grid casting and ripening process

A technology of release agent and grid, which is applied in the direction of casting mold composition, casting molding equipment, casting mold, etc., can solve the problems that the alloy liquid is difficult to fill the mold and the thickness is uneven, so as to improve the aging resistance rate and increase the number of pieces produced , the effect of simplifying the formula

Active Publication Date: 2019-10-01
JIANGXI XINWEI POWER ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Because the grid is affected by the quality of the release agent during casting, the product often has defects such as pores, cracks, and uneven thickness. Since the mold is made of metal, it has the characteristics of fast heat dissipation. The groove in the inner cavity of the mold is relatively narrow and shallow. Make it difficult for the molten alloy to fill the mold

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The weight ratio of the release agent is: 0.07% of cork powder: 0.05% of polyvinyl alcohol; 0.05% of water glass; the balance is purified water; wherein the cork powder is 300 mesh.

[0023] The production process is as follows:

[0024] Add the purified water, cork powder, polyvinyl alcohol, and water glass into the pressure cooker according to the formula, and stir the above materials until they are fully wet and free of dry lumps, ensuring that the liquid level exceeds the safety line specified by the pressure cooker, and then fire Boil, when the pressure relief valve starts to release steam, time to maintain high temperature and high pressure for 25 minutes during the ripening process, and open the cover after cooling.

[0025] The method of using the release agent is as follows: After the production is completed, before spraying the mold, brush the surface of the mold with a wire brush. When the temperature is 165°C, put the prepared release agent into the watering...

Embodiment 2

[0027] 0.05% of cork powder: 0.03% of polyvinyl alcohol; 0.03% of water glass; the balance is purified water. Wherein the cork powder is 500 mesh.

[0028] The production process is as follows:

[0029] Add the purified water, cork powder, polyvinyl alcohol, and water glass into the pressure cooker according to the formula, and stir the above materials until they are fully wet and free of dry lumps, ensuring that the liquid level exceeds the safety line specified by the pressure cooker, and then fire Boil, when the pressure relief valve starts to release steam, keep the high temperature and high pressure for 20 minutes during the ripening process, and open the cover after cooling.

[0030] The method of using the release agent is as follows: After the production is completed, before spraying the mold, brush the surface of the mold with a wire brush. When the temperature is 160-170°C, put the prepared release agent into the watering can and spray it with 0.4Kpa air pressure f...

Embodiment 3

[0032] 0.1% of cork powder: 0.07% of polyvinyl alcohol; 0.07% of water glass; the balance is purified water. Wherein the cork powder is 600 mesh.

[0033] The production process is as follows:

[0034] Add the purified water, cork powder, polyvinyl alcohol, and water glass into the pressure cooker according to the formula, stir the above materials until they are fully wet and free from dry lumps, and ensure that the liquid level exceeds the safety line specified by the pressure cooker, and then turn on the fire Boil, when the pressure relief valve starts to release steam, time to maintain high temperature and high pressure for 30min aging process, open the cover after cooling and use.

[0035] The method of using the release agent is as follows: After the production is completed, before spraying the mold, brush the surface of the mold with a wire brush. When the temperature is 180°C, put the prepared release agent into the watering can, and spray it with 0.6Kpa air pressure. ...

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Abstract

The invention discloses a mold release agent for grid casting and a ripening process. High-temperature and high-pressure treatment is mainly carried out in a preparation process, firstly, pure water,cork powder, polyvinyl alcohol and an adhesive in a formula amount are added into a high-pressure cooker in sequence, and the materials are stirred until the materials are fully wet and free of dry lumps, it is ensured that the liquid level height does not exceed a liquid level height safety line specified by the high-pressure cooker; then fire is turned on for boiling the materials; and the hightemperature and high pressure aging process is maintained for 15-30 min when a steam release valve starts to release steam. The mold release agent prepared by the process has the advantages of easiness in spraying, full adhesion of the cork powder, wear resistance, durability, high-pressure resistance, smooth exhaust and the like; the weight and thickness stability of products in the casting process are greatly improved, the phenomena of pores, cracks and the like of grids can be effectively reduced, the mod spraying frequency in unit time can be reduced, and the production efficiency and product quality are improved.

Description

technical field [0001] The invention relates to a maturing process of a release agent in a grid casting process, and belongs to the field of lead-acid storage battery production. Background technique [0002] The role of the grid in the battery is mainly to support the active material, act as the carrier of the active material, conduct and collect current, and make the current evenly distributed on the active material to improve the utilization rate of the active material. Therefore, the quality of the grid directly affects the overall performance of the battery. Its production process is as follows: [0003] Alloy preparation→melting→grid mold preheating→spray molding→casting→shearing and leveling→inspection→age hardening→standby [0004] Gravity casting grid molds are made of cast iron or its alloys as the base material and processed into cavity molds. Because the metal mold dissipates heat quickly and the horizontal and vertical ribs of the grid are relatively small, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 张森张昱张殊文
Owner JIANGXI XINWEI POWER ENERGY TECH
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