CN107597530B

CN107597530B - Surface treatment process for cast iron product

Info

Publication number: CN107597530B
Application number: CN201710820633.0A
Authority: CN
Inventors: 庞耀勇
Original assignee: Foshan Gaoming Fuhuang Hardware Product Industrial Co ltd
Current assignee: Foshan Gaoming Fuhuang Hardware Product Industrial Co ltd
Priority date: 2017-09-13
Filing date: 2017-09-13
Publication date: 2021-02-09
Anticipated expiration: 2037-09-13
Also published as: CN107597530A

Abstract

The invention discloses a surface treatment process of a cast iron product, which comprises the steps of carrying out sand cleaning treatment on the surface of the cast iron product, spraying a layer of transparent antirust agent on the surface of the cast iron product, firing the cast iron product for 10-25 min at 165-180 ℃, keeping the original metallic luster of the cast iron, and playing a role in preventing the cast iron from rusting.

Description

Surface treatment process for cast iron product

Technical Field

The invention relates to the technical field of metal surface treatment, in particular to a surface treatment process of a cast iron product.

Background

Iron is a basic element for forming cells, 72 percent of iron in a human body exists in hemoglobin, iron deficiency can cause anemia, the intake channel of the iron element in life is limited, and the iron element which can be absorbed by the human body only can be active iron element. According to statistics, about 30 percent of children in China suffer from anemia, female iron deficiency is particularly serious, and middle-aged and elderly people suffer from anemia in different degrees.

The cast iron mainly comprises iron, carbon and silicon, active iron atoms contained in the cast iron are easy to absorb by human bodies, anemia can be improved by using the cast iron pan, the cast iron pan has less impurities and relatively uniform heat transfer, and when the temperature of fire exceeds 200 ℃, the cast iron pan can control the temperature transferred to food to be 230 ℃ by emitting certain heat energy, so that the food is not easy to stick to the pan and nutrient components of the food are not damaged.

However, cast iron is easily rusted, is not favorable for preservation and long-term use, and the surface thereof must be subjected to rust-proofing treatment. The traditional metal rust-proof treatment comprises the steps of covering a layer of enamel on the surface of metal, spraying rust-proof paint and smearing vegetable oil. The process of covering enamel on the metal surface is complex to operate, and the enamel is easy to crack at high temperature and is not suitable for the production of cast iron pots; the spraying of the antirust paint applied to the cookware has complex process and is not beneficial to the health of human body; the process of coating vegetable oil is easy to generate peculiar smell due to acidification of the vegetable oil, and cast iron is discolored and rusted, so that the antirust effect cannot be achieved.

It is seen that improvements and enhancements to the prior art are needed.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a surface treatment process of a cast iron product, and aims to solve the problems that the surface of the cast iron product in the prior art is complex in rust prevention treatment process, and the product does not simultaneously have the advantages of suitability for high-temperature use, no peculiar smell, no toxicity, good rust prevention function and the like.

In order to achieve the purpose, the invention adopts the following technical scheme:

a surface treatment process of a cast iron product comprises the following steps:

A. carrying out sand removal treatment on the surface of the cast iron product;

B. heating the sand-cleaned cast iron product to 35-38 ℃, and spraying an antirust agent on the surface of the cast iron product;

C. and C, firing the cast iron product treated in the step B for 10-25 min at 165-180 ℃, and naturally cooling to obtain a finished product.

The surface treatment process of the cast iron product comprises the step B of heating the sand-cleaned cast iron product to 35 ℃, and spraying the antirust agent on the surface of the cast iron product by using a spray gun.

The surface treatment process of the cast iron product comprises the step B of spraying the antirust agent, wherein the thickness of the coating of the antirust agent in the step B is 0.2-0.5 mm.

And D, firing the cast iron product treated in the step B for 15min at 165-175 ℃, and naturally cooling to obtain a finished product.

The surface treatment process of the cast iron product comprises the step of treating the cast iron product with a water-soluble resin.

Has the advantages that:

the invention provides a surface treatment process of a cast iron product, which is characterized in that a layer of transparent antirust agent is sprayed on the surface of the cast iron product after the surface of the cast iron product is cleaned and is fired at high temperature, so that the original metal luster of the cast iron product is kept, the surface of the cast iron product can be prevented from rusting, the sprayed antirust agent is nontoxic and harmless, the requirements of food sanitation standards are met, the process is simple to operate, and the obtained product is free from cracking and peculiar smell when used at high temperature.

Drawings

FIG. 1 is a flow chart of a surface treatment process of a cast iron product according to the present invention.

Detailed Description

The invention provides a surface treatment process for cast iron products, which is further described in detail below by referring to the attached drawings and embodiments in order to make the purpose, technical scheme and effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, the present invention provides a surface treatment process for cast iron products, comprising the following steps:

A. carrying out sand removal treatment on the surface of the cast iron product; the cast iron product is processed by a cast or forged blank, and the blank is cast by a sand mold in the casting or forging process, so the residual bonded sand on the blank is often cleaned, and the subsequent operation can be smoothly carried out after the bonded sand on the surface of the cast iron product is cleaned.

B. Heating the sand-cleaned cast iron product to 35-38 ℃, and spraying an antirust agent on the surface of the cast iron product; specifically, the rust preventive agent used in the present embodiment is prepared by uniformly mixing 8013-T3005-1N A and 8013-T3005-1N B, manufactured by Anato corporation, in a ratio of 1: 1.

By adopting the treatment process, the cast iron product has the antirust effect while keeping the original metal color, the process is simple and feasible, the obtained product meets the requirements of food sanitation standards, and the cast iron product is suitable for manufacturing food containers and does not generate peculiar smell, discolor or crack at high temperature.

Specifically, the step B is to heat the sand-cleaned cast iron product to 35 ℃, and spray a rust inhibitor on the surface of the cast iron product by using a spray gun. In the embodiment, at about 35 ℃, the surface of a cast iron product is sprayed with a rust inhibitor which is prepared by uniformly mixing 8013-T3005-1N A and 8013-T3005-1N B of Anato company in a ratio of 1: 1 by a spray gun, the temperature is too low, and the adhesion of the rust inhibitor is poor; when the temperature is too high, the antirust agent foams and cannot be uniformly and flatly attached to the surface of the cast iron product; the antirust agent sprayed at 35 ℃ has the best adhesive force, does not foam, does not crack after being cured, does not change color at high temperature, and does not generate peculiar smell.

Specifically, the thickness of the coating of the sprayed antirust agent in the step B is 0.2-0.5 mm; the coating is too thin to well protect the surface of the metal, so that the metal surface has the performance of preventing rusting; the coating is too thick, the adhesive force is not good, and the coating is easy to fall off after curing.

Specifically, the step D is to fire the cast iron product treated in the step B for 15min at the temperature of 165-175 ℃, and naturally cooling to obtain a finished product; in the present embodiment, the cast iron product fired at the above temperature and time can maintain the original metallic color and luster, and the rust preventive agent on the surface thereof adheres well thereto; the temperature is too low, the firing time is too short, the antirust agent is cured slowly and even is not dried, and a uniform film can not be well formed to protect the cast iron product; if the temperature is too high and the firing time is too long, the rust inhibitor can peel, crack and fall off.

Specifically, the base material of the cast iron product is gray cast iron; the cast iron product in the present embodiment is preferably a grey cast iron product, particularly a cookware made of grey cast iron, which can meet the manufacturing requirements because the cookware needs to meet the requirements of being suitable for use at high temperature, having antirust performance and meeting the food sanitation standard.

In conclusion, the invention provides a surface treatment process of a cast iron product, which comprises the steps of cleaning the surface of the cast iron product, spraying a layer of transparent antirust agent on the surface of the cast iron product, and firing at high temperature, so that the original metal color of the cast iron product is maintained, the surface of the cast iron product can be prevented from rusting, the sprayed antirust agent is nontoxic and harmless, the requirements of food sanitation standards are met, the process is simple to operate, and the obtained product is free from cracking and odor generation when used at high temperature.

It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.

Claims

1. A surface treatment process for a cast iron product, characterized in that a base material of the cast iron product is gray cast iron, the process comprising the steps of:

A. carrying out sand removal treatment on the surface of a cast iron product, wherein the cast iron product is processed by a cast or forged blank, and the blank is cast by a sand mold in the casting or forging process;

B. heating the sand-cleaned cast iron product to 35-38 ℃, and spraying an antirust agent which is formed by uniformly mixing 8013-T3005-1N A and 8013-T3005-1N B of Anato company in a ratio of 1: 1 on the surface of the sand-cleaned cast iron product, wherein the thickness of the sprayed antirust agent is 0.2-0.5 mm;

C. and C, firing the cast iron product treated in the step B for 15min at 165-175 ℃, and naturally cooling to obtain a finished product, wherein the finished product can be used for manufacturing food containers.

2. The surface treatment process of a cast iron product according to claim 1, wherein the step B is to heat the cast iron product after sand removal to 35 ℃ and spray a rust inhibitor on the surface of the cast iron product by using a spray gun.