CN111136239A - Casting method of hot pot - Google Patents
Casting method of hot pot Download PDFInfo
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- CN111136239A CN111136239A CN201911390020.3A CN201911390020A CN111136239A CN 111136239 A CN111136239 A CN 111136239A CN 201911390020 A CN201911390020 A CN 201911390020A CN 111136239 A CN111136239 A CN 111136239A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cookers (AREA)
Abstract
The invention discloses a casting method of a hot pot, and belongs to the field of special pots. The method comprises the following steps of (1) preparing an upper die by using the coated sand; (2) manufacturing a mud lower die; pouring casting water into the lower die; (3) combining the upper die and the lower die filled with casting water, and pressing and molding the combined upper die and lower die into a blank by using a pressure cooker; polishing and sand removal; normalizing at high temperature, and cooling. The upper die is made of precoated sand, and the lower die is made of soil; the pot has the advantages that the pot can be formed in one step, the thickness of each part is uniform and can reach 2mm, the requirement on the thickness of a hot pot is met, meanwhile, welding is avoided, and the service life is long. The pot is formed by one-time pressure, so that the quality of the pot is improved. Meanwhile, the equipment investment is reduced, the cost is saved, the process flow is greatly shortened, and the production efficiency is improved; no chemical substance residue and environmental protection.
Description
Technical Field
The invention relates to the field of specially-made pots, in particular to a method for casting a hot pot.
Background
The chafing dish is a living article of people's toad palace, and the shape is different according to the function of chafing dish, and general types are three, and are respectively a ' mother-son pot ', a mandarin duck pot and a red soup pot. The structure is complex, and the integrated molding is not easy.
The precoated sand has the advantages of vibration sand removal, high strength, low gas generation and low expansion; melt has good dispersibility and high surface smoothness of casting; the shell mold has no layer, good thermal stability, good thermal conductivity, good fluidity and flat casting surface; high temperature resistance, good demoulding performance and good sand adhesion resistance; the shell layer is uniform, does not peel, has high curing speed, and is commonly used for steel castings and iron castings. In the pot casting by the precoated sand, when the pot with the diameter exceeding 400mm is cast by the conventional precoated sand, the obtained pot wall is more than 6mm, so the pot with the thick wall is too heavy, the input of heat energy is increased in the use process, and the use cost is increased.
The wall thickness of the chafing dish is generally required to be about 2mm, and the chafing dish cannot be manufactured by adopting the precoated sand to be integrally formed. Therefore, the existing chafing dish is generally formed by respectively compression molding metal materials such as steel plates, copper plates and the like and then welding according to the structural requirements of the pot. The welded pot is easy to split at the connecting part; meanwhile, the welding position is heated unevenly, so that the use of the cooker is influenced. In addition, the pot is formed by welding after the mould is formed, the process flow of manufacturing the whole pot is increased, and the manufacturing cost is improved.
Disclosure of Invention
In order to solve the problems, the invention provides a manufacturing method of a hot pot which is integrally formed, simple in process, low in cost and thin in pot wall.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a casting method of a hot pot comprises the following steps:
(1) preparing an upper die by using the coated sand; installing an upper die;
(2) manufacturing a mud lower die; adjusting and installing a lower die; pouring casting molten iron into the lower die;
(3) quickly combining the upper die in the step (1) and the lower die filled with casting water in the step (2), and then pressing and molding the combined upper die and the lower die into a blank by using a pressure cooker;
(4) taking out the blank, polishing and sand removal; normalizing at high temperature, and cooling to obtain a pan body;
(5) heating the pot body to 150 ℃, spraying a small amount of edible vegetable oil, putting the pot body into a drying tunnel at 220 ℃ after spraying, and keeping for 1 minute to ensure that the edible vegetable oil on the pot body loses free water, thus obtaining the finished product of the hot pot.
Further, the precoated sand in the step (1) comprises the following components: 85-97 parts of natural silica sand, 1-5 parts of adhesive, 0.1-1 part of curing agent and 0.1-1 part of reinforcing agent.
Further, the precoated sand in the step (1) comprises the following components: 90-95 parts of natural silica sand, 3-5 parts of adhesive, 0.5-0.8 part of curing agent and 0.2-0.5 part of reinforcing agent.
Preferably, the precoated sand in the step (1) comprises the following components: 94 parts of natural silica sand, 5 parts of adhesive, 0.8 part of curing agent and 0.2 part of reinforcing agent.
Further, the particle size of the natural silica sand is 180-200 meshes.
Further, the adhesive comprises the following components: the weight portions are as follows: 10-30 parts of silicon carbide, 1-5 parts of alumina, 5-10 parts of polyborosiloxane and 40-60 parts of thermoplastic phenolic resin.
Preferably, the adhesive comprises the following components: the weight portions are as follows: 20 parts of silicon carbide, 2 parts of alumina, 8 parts of polyborosiloxane and 50 parts of thermoplastic phenolic resin.
Further, the curing agent is urotropin.
Further, the reinforcing agent comprises the following components in percentage by weight: 80-90% of calcium stearate and 10-20% of polyborosiloxane.
Preferably, the reinforcing agent comprises the following components in percentage by weight: 90% of calcium stearate and 10% of polyborosiloxane.
Further, the casting water in the step (2) is molten iron, or molten copper, or molten aluminum or molten steel.
Further, the temperature in the high-temperature normalizing in the step (4) is 800-900 ℃. Preferably 840-850 ℃.
The casting method of the hot pot has the beneficial effects that:
(1) the common clay-covered pan is manufactured by adopting clay-covered pan to manufacture upper and lower dies. However, the mold using the upper and lower clay films is generally simple in shape and thus easy to remove. However, the mold with the complicated shape structure of the hot pot cannot be demoulded by adopting a mold with upper and lower mud films. The upper die is made of precoated sand, and the lower die is made of soil; the pot has the advantages that the pot can be formed in one step, the thickness of each part is uniform and can reach 2mm, the requirement of the thickness of the hot pot is met, meanwhile, welding is avoided, the service life is long, and various patterns are attractive.
(2) The invention adopts one-step pressure forming, thus improving the quality of the cookware. Meanwhile, the equipment investment is reduced, the cost is saved, the process flow is greatly shortened, and the production efficiency is improved;
(3) the hot pot is subjected to high-temperature normalizing treatment after molding, the surface of the hot pot is free from any stain, the hot pot does not need to be thoroughly cleaned by a user before use, no chemical substance is left, and the hot pot is environment-friendly.
(4) The precoated sand is prepared by mixing natural silica sand, an adhesive, a curing agent and a reinforcing agent which are specific components; the adhesive is prepared by mixing silicon carbide, alumina, polyborosiloxane and thermoplastic phenolic resin, can prevent precoated sand from shelling, is easy to disperse, and effectively improves the recycling of the precoated sand. The application of the thermoplastic phenolic resin is reduced while curing and bonding, and the residues of chemical substances and the volatilization of harmful gases at high temperature are prevented, so that the whole production process and the product are more environment-friendly.
Detailed Description
The present invention will be described in further detail with reference to the following examples.
Example 1
A casting method of a hot pot comprises the following steps:
(1) preparing an upper die by using the coated sand; installing an upper die;
the precoated sand comprises the following components in parts by weight: 85 parts of natural silica sand, 1 part of adhesive, 0.1 part of curing agent and 0.1 part of reinforcing agent;
the particle size of the natural silica sand is 180 meshes;
the curing agent is urotropine;
the adhesive in the embodiment comprises the following components in parts by weight: 100 parts of silicon carbide, 1 part of alumina, 5 parts of polyborosiloxane and 40 parts of thermoplastic phenolic resin;
the reinforcing agent in the embodiment comprises the following components in percentage by weight: 90% of calcium stearate and 10% of polyborosiloxane;
(2) manufacturing a mud lower die; adjusting and installing a lower die; pouring molten iron into the lower die;
(3) combining the upper die in the step (1) with the lower die filled with casting water in the step (2), and then pressing and molding the combined upper die and the lower die into a blank by using a pressure cooker;
(4) taking out the blank, polishing and sand removal; normalizing at 850 deg.C, and cooling to obtain a pan body;
(5) heating the pot body to 150 ℃, spraying a small amount of edible vegetable oil, putting the pot body into a drying tunnel at 220 ℃ after spraying, and keeping for 1 minute to ensure that the edible vegetable oil on the pot body loses free water, thus obtaining the finished product of the hot pot.
Example 2
A casting method of a hot pot comprises the following steps:
(1) preparing an upper die by using the coated sand; installing an upper die;
the precoated sand comprises the following components in parts by weight: 97 parts of natural silica sand, 5 parts of adhesive, 1 part of curing agent and 1 part of reinforcing agent;
the particle size of the natural silica sand is 180 meshes;
the curing agent is urotropine;
the adhesive in the embodiment comprises the following components in parts by weight: 100 parts of silicon carbide, 1 part of alumina, 5 parts of polyborosiloxane and 40 parts of thermoplastic phenolic resin;
the reinforcing agent in the embodiment comprises the following components in percentage by weight: 90% of calcium stearate and 10% of polyborosiloxane;
(2) manufacturing a mud lower die; adjusting and installing a lower die; pouring molten iron into the lower die;
(3) combining the upper die in the step (1) with the lower die filled with casting water in the step (2), and then pressing and molding the combined upper die and the lower die into a blank by using a pressure cooker;
(4) taking out the blank, polishing and sand removal; normalizing at 850 deg.C, and cooling to obtain a pan body;
(5) heating the pot body to 150 ℃, spraying a small amount of edible vegetable oil, putting the pot body into a drying tunnel at 220 ℃ after spraying, and keeping for 1 minute to ensure that the edible vegetable oil on the pot body loses free water, thus obtaining the finished product of the hot pot.
Example 3
A casting method of a hot pot comprises the following steps:
(1) preparing an upper die by using the coated sand; installing an upper die;
the precoated sand comprises the following components in parts by weight: 90 parts of natural silica sand, 3 parts of adhesive, 0.5 part of curing agent and 0.2 part of reinforcing agent;
the particle size of the natural silica sand is 180 meshes;
the curing agent is urotropine;
the adhesive in the embodiment comprises the following components in parts by weight: 20 parts of silicon carbide, 2 parts of alumina, 8 parts of polyborosiloxane and 50 parts of thermoplastic phenolic resin;
the reinforcing agent in the embodiment comprises the following components in percentage by weight: 90% of calcium stearate and 10% of polyborosiloxane;
(2) manufacturing a mud lower die; adjusting and installing a lower die; pouring molten iron into the lower die;
(3) combining the upper die in the step (1) with the lower die filled with casting water in the step (2), and then pressing and molding the combined upper die and the lower die into a blank by using a pressure cooker;
(4) taking out the blank, polishing and sand removal; normalizing at 850 deg.C, and cooling to obtain a pan body;
(5) heating the pot body to 150 ℃, spraying a small amount of edible vegetable oil, putting the pot body into a drying tunnel at 220 ℃ after spraying, and keeping for 1 minute to ensure that the edible vegetable oil on the pot body loses free water, thus obtaining the finished product of the hot pot.
Example 4
A casting method of a hot pot comprises the following steps:
(1) preparing an upper die by using the coated sand; installing an upper die;
the precoated sand comprises the following components in parts by weight: 95 parts of natural silica sand, 3 parts of adhesive, 0.8 part of curing agent and 0.5 part of reinforcing agent;
the particle size of the natural silica sand is 180 meshes;
the curing agent is urotropine;
the adhesive in the embodiment comprises the following components in parts by weight: 20 parts of silicon carbide, 2 parts of alumina, 8 parts of polyborosiloxane and 50 parts of thermoplastic phenolic resin;
the reinforcing agent in the embodiment comprises the following components in percentage by weight: 90% of calcium stearate and 10% of polyborosiloxane;
(2) manufacturing a mud lower die; adjusting and installing a lower die; pouring molten iron into the lower die;
(3) combining the upper die in the step (1) with the lower die filled with casting water in the step (2), and then pressing and molding the combined upper die and the lower die into a blank by using a pressure cooker;
(4) taking out the blank, polishing and sand removal; normalizing at 850 deg.C, and cooling to obtain a pan body;
(5) heating the pot body to 150 ℃, spraying a small amount of edible vegetable oil, putting the pot body into a drying tunnel at 220 ℃ after spraying, and keeping for 1 minute to ensure that the edible vegetable oil on the pot body loses free water, thus obtaining the finished product of the hot pot.
Example 5
A casting method of a hot pot comprises the following steps:
(1) preparing an upper die by using the coated sand; installing an upper die;
the precoated sand comprises the following components in parts by weight: 94 parts of natural silica sand, 5 parts of adhesive, 0.8 part of curing agent and 0.2 part of reinforcing agent;
the particle size of the natural silica sand is 180 meshes;
the curing agent is urotropine;
the adhesive in the embodiment comprises the following components in parts by weight: 20 parts of silicon carbide, 2 parts of alumina, 8 parts of polyborosiloxane and 50 parts of thermoplastic phenolic resin;
the reinforcing agent in the embodiment comprises the following components in percentage by weight: 90% of calcium stearate and 10% of polyborosiloxane;
(2) manufacturing a mud lower die; adjusting and installing a lower die; pouring copper water into the lower die;
(3) combining the upper die in the step (1) with the lower die filled with casting water in the step (2), and then pressing and molding the combined upper die and the lower die into a blank by using a pressure cooker;
(4) taking out the blank, polishing and sand removal; normalizing at 850 deg.C, and cooling to obtain a pan body;
(5) heating the pot body to 150 ℃, spraying a small amount of edible vegetable oil, putting the pot body into a drying tunnel at 220 ℃ after spraying, and keeping for 1 minute to ensure that the edible vegetable oil on the pot body loses free water, thus obtaining the finished product of the hot pot.
Example 6
A casting method of a hot pot comprises the following steps:
(1) preparing an upper die by using the coated sand; installing an upper die;
the precoated sand comprises the following components in parts by weight: 94 parts of natural silica sand, 5 parts of adhesive, 0.8 part of curing agent and 0.2 part of reinforcing agent;
the particle size of the natural silica sand is 180 meshes;
the curing agent is urotropine;
the adhesive in the embodiment comprises the following components in parts by weight: 30 parts of silicon carbide, 5 parts of alumina, 10 parts of polyborosiloxane and 60 parts of thermoplastic phenolic resin;
the reinforcing agent in the embodiment comprises the following components in percentage by weight: 90% of calcium stearate and 10% of polyborosiloxane;
(2) manufacturing a mud lower die; adjusting and installing a lower die; pouring molten iron into the lower die;
(3) combining the upper die in the step (1) with the lower die filled with casting water in the step (2), and then pressing and molding the combined upper die and the lower die into a blank by using a pressure cooker;
(4) taking out the blank, polishing and sand removal; normalizing at 850 deg.C, and cooling to obtain a pan body;
(5) heating the pot body to 150 ℃, spraying a small amount of edible vegetable oil, putting the pot body into a drying tunnel at 220 ℃ after spraying, and keeping for 1 minute to ensure that the edible vegetable oil on the pot body loses free water, thus obtaining the finished product of the hot pot.
Example 7
A casting method of a hot pot comprises the following steps:
(1) preparing an upper die by using the coated sand; installing an upper die;
the precoated sand comprises the following components in parts by weight: 94 parts of natural silica sand, 5 parts of adhesive, 0.8 part of curing agent and 0.2 part of reinforcing agent;
the particle size of the natural silica sand is 200 meshes;
the curing agent is urotropine;
the adhesive in the embodiment comprises the following components in parts by weight: 10 parts of silicon carbide, 1 part of alumina, 5 parts of polyborosiloxane and 40 parts of thermoplastic phenolic resin;
the reinforcing agent in the embodiment comprises the following components in percentage by weight: 90% of calcium stearate and 10% of polyborosiloxane;
(2) manufacturing a mud lower die; adjusting and installing a lower die; pouring molten steel into the lower die;
(3) combining the upper die in the step (1) with the lower die filled with casting water in the step (2), and then pressing and molding the combined upper die and the lower die into a blank by using a pressure cooker;
(4) taking out the blank, polishing and sand removal; normalizing at 840 deg.C, and cooling to obtain a pan body;
(5) heating the pot body to 150 ℃, spraying a small amount of edible vegetable oil, putting the pot body into a drying tunnel at 220 ℃ after spraying, and keeping for 1 minute to ensure that the edible vegetable oil on the pot body loses free water, thus obtaining the finished product of the hot pot.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.
Claims (8)
1. A casting method of a hot pot is characterized in that: the method comprises the following steps:
(1) preparing an upper die by using the coated sand; installing an upper die;
(2) manufacturing a mud lower die; adjusting and installing a lower die; pouring casting molten iron into the lower die;
(3) quickly combining the upper die in the step (1) and the lower die filled with casting water in the step (2), and then pressing and molding the combined upper die and the lower die into a blank by using a pressure cooker;
(4) taking out the blank, polishing and sand removal; normalizing at high temperature, and cooling to obtain a pan body;
(5) heating the pot body to 150 ℃, spraying a small amount of edible vegetable oil, putting the pot body into a drying tunnel at 220 ℃ after spraying, and keeping for 1 minute to ensure that the edible vegetable oil on the pot body loses free water, thus obtaining the finished product of the hot pot.
2. The method of casting a chafing dish according to claim 1, wherein: the precoated sand in the step (1) comprises the following components: 85-97 parts of natural silica sand, 1-5 parts of adhesive, 0.1-1 part of curing agent and 0.1-1 part of reinforcing agent.
3. The method of casting a chafing dish according to claim 1, wherein: the precoated sand in the step (1) comprises the following components: 90-95 parts of natural silica sand, 3-5 parts of adhesive, 0.5-0.8 part of curing agent and 0.2-0.5 part of reinforcing agent.
4. The method for casting a hot pot according to claim 2, wherein: the particle size of the natural silica sand is 180-200 meshes.
5. The method for casting a hot pot according to claim 2, wherein: the adhesive comprises the following components: the weight portions are as follows: 10-30 parts of silicon carbide, 1-5 parts of alumina, 5-10 parts of polyborosiloxane and 40-60 parts of thermoplastic phenolic resin.
6. The method for casting a hot pot according to claim 2, wherein: the reinforcing agent comprises the following components in percentage by weight: 80-90% of calcium stearate and 10-20% of polyborosiloxane.
7. The method of casting a chafing dish according to claim 1, wherein: in the step (2), the casting solution is molten iron, or copper water, or aluminum water, or molten steel.
8. The method of casting a chafing dish according to claim 1, wherein: the temperature in the high-temperature normalizing in the step (4) is 800-900 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911390020.3A CN111136239A (en) | 2019-12-30 | 2019-12-30 | Casting method of hot pot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911390020.3A CN111136239A (en) | 2019-12-30 | 2019-12-30 | Casting method of hot pot |
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| CN111136239A true CN111136239A (en) | 2020-05-12 |
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