Spray powder drying oven description: 1. **Structural composition**:    - **Shell**: Usually made of cold-rolled steel plates, angle steel and other materials. It plays the role of protecting and supporting the internal structure. At the same time, it has certain strength and stability.    - **Liner**: Generally made of stainless steel plates, it has the characteristics of corrosion resistance and non-rusting. It can ensure the cleanliness inside the drying oven and prevent pollution to the workpieces after powder spraying. The quality of the liner plate and the welding process affect the service life and sealing performance of the drying oven.    - **Insulation layer**: Located between the shell and the liner, it is filled with insulation materials such as high-temperature aluminum silicate fiber cotton. It can reduce heat loss, improve energy utilization efficiency and reduce operating costs.    - **Heating element**: Common ones are electric heating tubes, heating wires, etc. They are the core heating components of the drying oven. Their quality and layout directly affect the temperature uniformity and heating speed inside the drying oven.    - **Hot air circulation system**: Composed of air supply motor, wind wheel, air duct, etc. The air supply motor drives the wind wheel to send out cold air. After the cold air is heated by the heating element, it enters every corner of the drying oven工作室 evenly through the air duct to ensure that the workpiece is heated evenly.    - **Temperature control system**: Including temperature sensor, temperature controller, relay, etc. The temperature sensor monitors the temperature inside the drying oven in real time and transmits the signal to the temperature controller. The temperature controller controls the operation of the heating element according to the set temperature value to achieve accurate temperature control.    - **Door and sealing device**: The design of the door should be convenient for opening and closing and operation, and at the same time ensure good sealing performance to prevent heat leakage and the entry of external air. The sealing device usually uses materials such as silicone rubber door seals to ensure the tightness of the drying oven during operation. 2. **Working principle**: The working principle of the spray powder drying oven is to use the heat generated by the heating element to evenly blow the hot air onto the workpiece in the drying oven through the hot air circulation system, so that the powder sprayed is cured at high temperature. The specific process is that after the workpiece is sprayed with powder, it is placed in the drying oven. Set the required temperature and time. The heating element starts to work. The hot air circulation system continuously circulates and blows the hot air to make the powder coating on the surface of the workpiece quickly cured to form a hard and smooth coating. 3. **Main functions**:    - **Curing and drying**: The surface of the workpiece after powder spraying is attached with powder coating, which needs to be cured at a certain high temperature to form a firm coating and improve the wear resistance, corrosion resistance and appearance quality of the workpiece.    - **Preheating treatment**: For some workpieces that need subsequent processing, such as welding and assembly, preheating treatment can be carried out before powder spraying to increase the temperature of the workpiece and reduce deformation and stress during subsequent processing.    - **Aging test**: It can simulate the high-temperature environment of the workpiece during long-term use and conduct aging tests on the workpiece to test the reliability and durability of the workpiece. 4. **Technical parameters**:    - **Temperature range**: According to different powder spraying processes and workpiece materials, the temperature range of the spray powder drying oven is generally from room temperature to 300°C or even higher. For example, for common powder coatings, the curing temperature is usually around 180°C - 220°C.    - **Temperature uniformity**: When there is no load, the temperature uniformity is generally required to be within ±3°C to ±5°C to ensure that the curing effect of the workpiece at each part in the drying oven is consistent.    - **Heating rate**: The time from room temperature to the set temperature should not be too long. Generally, it is required to be within 10-30 minutes. A fast heating rate can improve production efficiency.    - **Heating power**: Determined according to factors such as the volume of the drying oven, temperature range and heating rate. The power size directly affects the heating effect and energy consumption of the drying oven.    - **Workroom size**: Selected according to the size and quantity of workpieces to ensure that the workpieces can be smoothly placed in the drying oven and there is enough space for hot air circulation. 5. **Precautions for use**:    - **Safe operation**: The drying oven should be installed in a dry and horizontal place indoors and a good ground wire should be connected. Before use, check whether the power supply, voltage and wiring are correct. During the operation of the drying oven, do not perform operations such as washing, scraping paint and spraying alcohol beside it. Flammable, explosive, acidic, volatile, corrosive and other items are strictly prohibited from entering the box.    - **Sample placement**: When placing workpieces, they should be placed evenly and not too densely. There should be a certain space left on the upper, lower and surrounding sides to keep the air flow in the box unobstructed. If the sample will produce a phase change at a high temperature, it must be placed in a tray to avoid contaminating other samples.    - **Temperature setting**: The set temperature cannot exceed the rated temperature of the drying oven. The specific set temperature is determined by experimental needs and the properties of the baked materials.    - **On and off operations**: When starting up, turn on the power supply first. After the instrument shows normal, then turn on the heating switch. When shutting down, turn off the heating switch first. After the temperature inside the drying oven drops to a safe range, then turn off the power supply. 6. **Application fields**: Spray powder drying ovens are widely used in industries such as auto parts, hardware parts, electronic components, plastic parts, furniture, building materials and more. For example, the powder spraying and curing of car bodies, the surface treatment of hardware tools, and the coating of electronic equipment casings all require the use of spray powder drying ovens.