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Spraying method of metal mold casting paint

A metal mold casting and coating technology, which is applied in casting molding equipment, metal processing equipment, coating, etc., can solve problems such as cracking, peeling, uneven deposition of coating on the surface of the mold, and achieve long service life and excellent adhesion Strong, improve the effect of filling quality

Active Publication Date: 2018-02-06
山东春冶机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for spraying metal mold casting coatings, which can solve the problems of uneven deposition of mold surface coatings and local defects of cracking and peeling in existing metal mold casting coating coating methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The spraying method of the metallic mold casting coating of this embodiment includes the following steps:

[0017] A. Use organic solvents to clean the surface of the mold, and dry after cleaning;

[0018] B. Sandblasting the mold to make the surface cleanliness of the mold reach Sa2.5 level and the surface roughness reach 35um;

[0019] C. Within 2 hours after the completion of step B, heat the mold to 220°C, dilute the paint to Baume degree 45°, spray 4 layers of paint on the mold cavity and gate with a spray gun, each with a thickness of 45um, and the spraying distance is 220mm, spray gun pressure is 1.2MPa;

[0020] D. After spraying, dry the mold at 65°C for 60 minutes.

Embodiment 2

[0022] The spraying method of the metallic mold casting coating of this embodiment includes the following steps:

[0023] A. Use organic solvents to clean the surface of the mold, and dry after cleaning;

[0024] B. Sandblasting the mold to make the surface cleanliness of the mold reach Sa2.5 and the surface roughness reach 30um;

[0025] C. Within 2 hours after the completion of step B, heat the mold to 185°C, dilute the paint to a Baume degree of 38°, spray 5 layers of paint on the mold cavity and gate with a spray gun, each with a thickness of 30um, and the spraying distance is 250mm, the spray gun pressure is 1.3MPa;

[0026] D. After spraying, dry the mold at 70°C for 60 minutes.

Embodiment 3

[0028] The spraying method of the metallic mold casting coating of this embodiment includes the following steps:

[0029] A. Use organic solvents to clean the surface of the mold, and dry after cleaning;

[0030] B. Perform sandblasting on the mold to make the surface cleanliness of the mold reach Sa2.5 and the surface roughness reach 40um;

[0031] C. Within 2 hours after the completion of step B, heat the mold to 200°C, dilute the paint to a Baume degree of 50°, spray 5 layers of paint on the mold cavity and gate with a spray gun, each with a thickness of 35um, and the spraying distance is 280mm, spray gun pressure is 1.6MPa;

[0032] D. After spraying, dry the mold at 75°C for 60 minutes.

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Abstract

The invention discloses a method for spraying metal mold casting paint, which relates to the field of casting technology. The method comprises the following steps: A. using an organic solvent to clean the mold surface, and drying after cleaning; B. sandblasting the mold to make the casting The surface cleanliness of the model reaches Sa2.5 level, and the surface roughness reaches 30-40um; C, within 2 hours after step B is completed, heat the mold to 185-220°C, and dilute the paint to Baume degree 38-50°, Use a spray gun to spray 4-5 layers of paint on the mold cavity and gate, each layer thickness is 30-45um, the spraying distance is 220-280mm, and the spray gun pressure is 1.2-1.6MPa; D. After spraying, put the mold at 65- Dry at 75°C for 60 minutes. The invention solves the problems that the existing metal mold casting paint coating method has uneven deposition of the mold surface coating, and local cracking and peeling defects.

Description

Technical field [0001] The invention relates to the field of casting technology, in particular to a spraying method of metal mold casting paint. Background technique [0002] Metal mold casting is a casting method in which liquid metal is poured into a metal mold to obtain castings. It is also called hard mold casting or permanent mold casting, and is a technology developed in recent years. The pouring temperature and speed of the metal mold are higher and faster than that of the sand mold, because when the pouring temperature is low and the speed is slow, defects such as insufficient pouring and cold isolation will occur. During metal mold casting, coatings are applied to the surface of the cavity. The coating can protect the metal mold from thermal shock, erosion and wear during pouring. It can adjust the cooling rate of the casting and improve the surface quality of the casting. When the casting is taken out, Can prevent mold wear. The coating method of the coating affects t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C23/02B22C3/00
Inventor 谭科文
Owner 山东春冶机械制造有限公司