What should be paid attention to when using electric heaters in different machines

As a consumer, if you want to improve the efficiency and high performance of electric heaters in different industries and machines, you must first understand what electric heaters are? What should be paid attention to when using electric heaters on different machines and industries? First of all, understand what electric heaters are? What are the characteristics of electric heaters?
Electric heaters are a kind of tubular electric heating element, which is composed of metal tube spiral resistance wire and crystallized magnesium oxide powder. The high-temperature resistance wire is evenly distributed in the stainless steel seamless pipe, and the gap is filled with crystallized magnesium oxide powder with good thermal conductivity and insulation properties. The structure is not only better, but also has high thermal efficiency and uniform heating. When current passes through the high-temperature resistance wire, the heat generated is diffused to the surface of the metal tube through the magnesium oxide powder, and then transferred to the heated part or the air to achieve the purpose of heating.

Usage characteristics: 1. Good thermal efficiency and uniform heating;
2. High temperature resistance and corrosion resistance;
3. Good safety performance;
4. Long service life.

2. In which industrial machinery will electric heaters be used?

1. Used for drying wood, paper, printing and dyeing, paint, etc., with silicone rubber heating plates, etc.

2. For melting and heating saltpeter and other salt substances, there are dry-burning electric heaters, etc.

3. For melting low-melting-point alloys, such as lead melting furnaces, tin melting furnaces, etc., there are silicone rubber heating belts, etc.

4. For building heating, there are heating films, etc.

5. For low-temperature electric furnaces such as industrial electric furnaces with air circulation, there are electric ovens, etc.

3. Based on many years of sales and production experience, the following analyzes the matters that need to be paid attention to when using electric heaters on different machines for reference by consumers:

(1). What should be paid attention to when using electric heaters in ovens?

According to the structure of the oven, the electric heater can leave a larger section at the wiring point to facilitate the installation of the insulation layer. This is particularly obvious for the GYQ air tubular heater. Let's talk about what you need to pay attention to when using electric heaters in ovens.

The composition of the heating oven is mainly composed of a box body, an electric heater, a temperature controller, a timer and a power adjustment switch. The oven body is mainly composed of a three-layer structure of an outer shell, a middle partition air duct and an insulation layer, and an inner liner. Curling is formed on the front and rear edges of the inner liner to isolate the cavity air; high-temperature resistant aluminum silicate fiber products are filled in the outer cavity to greatly reduce the temperature of the outer shell; at the same time, a rocker structure is installed on the door to keep the door pressed against the door frame, so that it has better sealing.

Matters needing attention when heating:

1. Cut off the power supply and turn off the oven.

2. The exhaust valve should be opened before power is turned on. Cabinet dehumidification heaters are widely used in refrigeration devices such as medium and small food warehouses, household refrigerators, and water and road refrigeration transportation.

3. Observe and adjust the temperature in the box at any time, which should meet the temperature required by the baking process.

4. When using a non-explosion-proof electric oven, it is strictly forbidden to bring volatile objects into the oven to prevent the electric heater from exploding.

5. Keep the electric oven clean, and check and remove the oxide scale next to the resistance wire in the oven.
6. Before powering on, check that the insulation of the power line is good to prevent leakage accidents. The resistance wires of the heater must not touch each other to prevent short circuit.

(2). What are the precautions for the mold temperature controller when using the electric heater?
The mold temperature controller, also known as the mold temperature controller, is used to heat or cool the mold and maintain its working temperature to ensure the stability of the quality of the injection molded parts and optimize the processing time. The mold temperature controller is divided into two types: water temperature controller and oil temperature controller. In the injection molding industry, the temperature of the mold plays a decisive role in the quality of the injection molded parts and the injection molding time.
The following are the precautions for the use of the mold temperature controller electric heater:
1. The components should be stored in a dry place. If the insulation resistance is lower than 1MΩ due to long-term storage, they can be dried in an oven at about 200℃, or the voltage can be reduced to heat it until the insulation resistance is restored.
2. Safety measures should be considered when heating nitrate to prevent explosion accidents.
3. The magnesium oxide powder at the outlet of the mold temperature controller heater should be protected from contaminants and moisture during use to prevent leakage accidents.
4. The components are allowed to work under the following conditions:
A. The relative humidity of the air is not more than 95%, and there is no explosive and corrosive gas. The battery energy storage heater can transfer heat to any desired place. During processing, it improves heat transfer, accelerates heating and reduces power requirements.
B. The working voltage should not be greater than 1.1 times the rated value, and the shell should be effectively grounded.
C. Insulation resistance ≥ 1MΩ Dielectric strength: 2KV/1min.
5. The wiring part should be placed outside the insulation layer to avoid contact with corrosive, explosive media and moisture; the lead wire should be able to withstand the temperature and heating load of the wiring part for a long time, and excessive force should be avoided when tightening the wiring screws.
6. When the mold temperature machine heats the air, the components should be arranged crosswise and evenly, so that the components have good heat dissipation conditions and the air flowing through can be fully heated. When heating fusible metals or solid nitrates, alkalis, asphalt, paraffin, etc., the voltage should be lowered first, and the rated voltage can be increased after the medium is melted.
The unique dual-power heating design of the mold temperature controller is suitable for use in different temperature control places, with obvious energy-saving effects. Stainless steel is relatively solid, with small tube loss and uniform heating. Automatic exhaust function when starting up. Mold return oil temperature detection table.

(3) What factors should be considered when using electric heaters for molds?

1. Different thicknesses of molds. Thicker and thinner areas should use heaters of different powers or reasonably arrange the positions of heaters with the same power.

2. The size of the mold. Arrange the heater according to the total volume of the mold. If a large-sized mold uses a low-power heater, the temperature rise will be too slow, affecting production efficiency and quality.

3. Consider the versatility of the heater and try to use heaters of the same size and voltage to facilitate future maintenance and repair.