CN101664278B - A method of manufacturing an electric heating plate - Google Patents

Abstract

The invention discloses a method for manufacturing an electric heating plate, comprising the following processing steps: (1) evenly mixing high-alumina cement, high-alumina fireclay, high-alumina aggregate and quartz sand, and then adding an amount of water to enable the mixture to be pasty; (2) adopting a pressure machine to press the mixture into a heating plate; (3) evenly mixing high-alumina fireclay and quartz sand, and then adding an amount of water to enable the mixture to be pasty; (4) adding an amount of materials obtained in the step 3 after a heating filament is added to the heating plate, enabling the heating filament to be completely covered; (5) evenly mixing high-alumina cement, temperature-resistance clay and river sand, and then adding an amount of water to enable the mixture to be pasty; (6) enabling the materials obtained in the step 5 to be covered on the surface of the heating plate so as to enable the surface of the heating plate to be smooth; (7) and naturally drying the heating plate until the heating plate is solidified. The electric heating plate manufactured by the process can collect and store heat generated by resistance wires, and therefore, the goal of heat reutilization is effectively achieved, and the process can be widely applied to manufacturing the electric heating plates of heating equipment of electric cookers, electric food warmers and the like.

Description

A method of manufacturing an electric heating plate

technical field

The invention relates to a manufacturing method of an electric heating plate.

Background technique

At present, the electric heating plates at the bottom of general electric rice cookers and electric heating pans use insulating and heat-conducting materials to fix the resistance wire in the metal tube, and then the metal tube and the bottom heating plate are processed as one by die-casting technology, relying on the principle of thermal conductivity to directly heat the heating plate. The pan is heated. The main disadvantages of general electric heaters are as follows: 1. Most of the heat generated by the lower part of the heating plate and its surroundings is dissipated in the external environment, and the heat utilization rate is low, accounting for only about 40%-50%; 2. When the heating object is heated to a certain temperature, the temperature of the heating plate drops rapidly after the power is turned off, and the heat preservation performance is poor. If heat preservation is required, the power supply can only be turned on intermittently to heat the heating plate, which wastes electric energy and does not meet the energy-saving requirements advocated by the state. 3. The processing performance of the metal heating plate is high, and high-temperature heating is required to waste energy in the processing process. The main processing process is: 1. Pull copper, aluminum, iron or alloy pipe materials into the pipes of the specifications used. 2. Put the resistance wire in the middle of the pipe with special equipment, fill it with magnesium oxide powder, and seal both ends. 3. Check for leakage, if leakage occurs, scrap it. 4. Compress qualified pipes with shrinking equipment. 7. Check for leakage, if leakage occurs, scrap it. 8. Heating pure aluminum into aluminum water and casting it with qualified pipes to form the body of the heater. 9. Machine the body into shape. 10. Check for leakage, if leakage occurs, scrap it. In the above-mentioned processing process, there are four processes that may produce scrap products, and the scrap rate is high; casting processing requires heating, which wastes energy; in addition, because high-temperature heating will generate a lot of pollution and pollute the environment, it does not meet the environmental protection requirements advocated by the state; and in In the above-mentioned traditional processing flow, about 500-1000 grams of aluminum or other metal materials are consumed to produce a common type of heating plate; in addition, a large amount of waste materials will be generated in the machining process of the heater body, wasting metal materials.

Contents of the invention

In order to overcome the deficiencies of the prior art, the invention provides a manufacturing method of an electric heating plate capable of storing thermal energy for continuous heating.

The technical solution adopted by the present invention to solve its technical problems is:

A method for manufacturing an electric heating plate, the process steps are as follows:

1): The mass components are: high alumina cement: 2.5~4 parts, high alumina fire clay: 3.5~5 parts, high alumina aggregate: 1~2 parts, particle size: 200~400 mesh quartz sand 1~ 2 parts, mix evenly and add appropriate amount of water to form a paste;

2): Use a 100-ton press to press the material obtained in step 1) into a heating plate, and then dry it naturally until it solidifies;

3): The mass components are: high-alumina fireclay: 3.5-5 parts, particle size: 200-400 mesh quartz sand 1-2 parts, mix evenly and add appropriate amount of water to form a paste;

4): After putting the heating wire in the heating plate, add an appropriate amount of the material obtained in step 3), so that the heating wire is completely covered;

5): The mass components are: high alumina cement: 2.5-4 parts, temperature-resistant mud: 2-3 parts, particle size: 200-400 mesh river sand 2.5-4 parts, mix evenly and add appropriate amount of water to form Pasty;

6): The surface of the heating plate obtained in step 4) covers the material obtained in step 5), so that the surface of the heating plate is smooth;

7): The heating plate obtained in step 6) is naturally dried until solidified.

The beneficial effects of the present invention are: the electric heating plate produced by this process can collect and store the heat generated by the resistance wire, and effectively realize the purpose of heat recovery and utilization. In addition, it can keep the food continuously boiling at the boiling point. If it is used on an electric rice cooker, it can continue to boil for 30-40 minutes, and if it is used on an electric pressure cooker, it can continue to boil for 60 minutes, and it will not damage the food. Nutritious doesn't burn food either. At room temperature, it can keep warm for 3-4 hours and still keep the food above 50°C. It has the characteristics of energy saving, no power consumption, and long heat preservation time. In addition, because the materials used for manufacturing this product are environmentally friendly and convenient, it is not necessary It will pollute the environment and not waste materials. Therefore, it can be widely used in the manufacture of electric heating plates of heating equipment such as electric rice cookers and electric heating pots.

Detailed ways

A method for manufacturing an electric heating plate, the process steps are as follows:

1): The mass components are: high alumina cement: 2.5~4 parts, high alumina fire clay: 3.5~5 parts, high alumina aggregate: 1~2 parts, particle size: 200~400 mesh quartz sand 1~ 2 parts, mix evenly and add appropriate amount of water to form a paste;

2): Use a 100-ton press to press the material obtained in step 1) into a heating plate, and then dry it naturally until it solidifies;

3): The mass components are: high-alumina fireclay: 3.5-5 parts, particle size: 200-400 mesh quartz sand 1-2 parts, mix evenly and add appropriate amount of water to form a paste;

4): After putting the heating wire in the heating plate, add an appropriate amount of the material obtained in step 3), so that the heating wire is completely covered;

5): The mass components are: high alumina cement: 2.5-4 parts, temperature-resistant mud: 2-3 parts, particle size: 200-400 mesh river sand 2.5-4 parts, mix evenly and add appropriate amount of water to form Pasty;

6): The surface of the heating plate obtained in step 4) covers the material obtained in step 5), so that the surface of the heating plate is smooth;

7): The heating plate obtained in step 6) is naturally dried until solidified.

In order to facilitate a further understanding of the present invention, the present invention will now be described in detail in conjunction with specific embodiments.

A method for manufacturing an electric heating plate, the process steps are as follows:

1): The mass components are: high-alumina cement: 3 parts, high-alumina fireclay: 4 parts, high-alumina aggregate: 1.5 parts, particle size: 300 mesh quartz sand 1.5 parts, mix evenly and add appropriate amount of water form a paste;

2): Use a 100-ton press to press the material obtained in step 1) into a heating plate, and then dry it naturally until it solidifies;

3): The mass composition is: 4 parts of high alumina fire clay, 1.5 parts of 300-mesh quartz sand, mixed evenly and then added with an appropriate amount of water to form a paste;

4): After putting the heating wire in the heating plate, add an appropriate amount of the material obtained in step 3), so that the heating wire is completely covered;

5): The mass components are: high alumina cement: 3 parts, temperature-resistant mud: 2.5 parts, particle size: 300 mesh river sand, 3 parts, after uniform mixing, add appropriate amount of water to form a paste;

6): The surface of the heating plate obtained in step 4) covers the material obtained in step 5), so that the surface of the heating plate is smooth;

7): The heating plate obtained in step 6) is naturally dried until solidified.

In the process of the above process, the production method is simple and convenient, less waste products are produced, and there is no need to waste metal materials for surface processing; the required materials (such as: quartz sand, river sand, temperature-resistant mud, high-alumina cement, etc.) are easy to obtain , Low cost, the cost is only 10% of the traditional heating plate; the production of a general type of heating plate only needs about 50-100 grams of aluminum or other metal materials, saving a lot of metal materials; no heating, no any Waste, effectively protect the ecological environment, so as to meet the environmental protection requirements advocated by the state.

In addition, the electric heating plate produced by this process, in the embodiment of the electric rice cooker, when the water temperature reaches the preset temperature (about 80°C) when cooking rice, there is no need for the water to boil. The electric heater will continue to send out the heat collected by setting the heat storage insulation layer, and the heat will gradually increase within 10 minutes until the water boils and the rice is cooked; when cooking porridge and soup, the water temperature reaches the preset temperature (about 90 ℃) There is no need to boil the water, disconnect the power supply, the heat storage and heat preservation electric heater will continue to emit the heat collected by the heat storage insulation layer, and the water will be in a boiling state for about 30 minutes. Because this product is equipped with a heat insulation layer, at normal temperature, it can keep the food warm for 3-4 hours and still make the food reach above 50°C. It can be seen from the above-mentioned embodiments that the electric heating plate produced by this process also meets the energy-saving requirements advocated by the state.

In addition, in the production process, the resistance heating wire is fully sealed with the outside world, and the sealing performance is good. In the process of use, it will not fail due to the oxidation of the resistance wire in contact with the air. The quality is guaranteed, the performance is reliable, and the service life is long. In a word, the electric heating plate produced by the above process is safe, energy-saving, environmentally friendly, reliable in performance, and long in service life, so it can be widely used in the production of electric heating plates for heating equipment such as electric rice cookers and electric heating pans.

Claims (1)

1. the preparation method of an electric heating plate, it is characterized in that: processing step is as follows:

1): become umber to be quality group: alumina cement: 2.5～4 parts, high-alumina chamotte: 3.5～5 parts, bauxites aggregate: 1～2 part, granularity are: 1～2 part of 200～400 purpose quartz sand, evenly mix the back and add an amount of water and form pasty state;

2): adopt 100 tons of forcing presses that the material that step 1) obtains is pressed into heat-generating disc, again it is dried naturally to solidifying;

3): become umber to be quality group: high-alumina chamotte: 3.5～5 parts, granularity are: 1～2 part of 200～400 purpose quartz sand, evenly mix the back and add an amount of water and form pasty state;

4): add the material that an amount of step 3) obtains after in heat-generating disc, putting into heating wire, make heating wire cover fully;

5): become umber to be quality group: alumina cement: 2.5～4 parts, heatproof mud: 2～3 parts, granularity are: 2.5～4 parts in 200～400 purpose river sand, evenly mix the back and add an amount of water and form pasty state;

6): the material that the heat-generating disc surface coverage step 5) that obtains in step 4) obtains makes the heat-generating disc surfacing;

7): the heat-generating disc that obtains in step 6) dries naturally to solidifying.