1. Scope of application: Cooperate with continuous baking process such as touch panel, PCB, membrane switch, button, cloth, leather, wood, plastic, spraying, printing, glass, shoes and hats.

2. Dimensions and main parameters

Three, the main performance

1. The shell of the whole machine is high-temperature electrostatic spray (non-common paint), which has the characteristics of corrosion resistance, wear resistance, rust resistance, ageing resistance and easy cleaning. The frame is designed with movable casters and foot cups, which is convenient for carrying and adjusting the level of the whole machine.

2. Furnace body part: Adjustable baffle plate, 80mm thick high-temperature silicic acid insulation rock wool in the middle, high-temperature insulation layer at the bottom of the mesh belt, so that the outside of the furnace body is not hot, and the top is equipped with an exhaust valve, Adjust the indoor air flow to make the temperature more uniform. Each furnace cover can be opened independently, which is convenient for cleaning and maintenance in the furnace. The middle of each furnace cover is covered with high-temperature silicic acid insulation rock wool, and high-temperature sealing silica gel is added around the furnace cover to achieve a good sealing effect and avoid unnecessary heat. Loss, so that the temperature outside the furnace is not hot, and the heat preservation effect in the furnace is good.

3. Heating system: adopts the latest cutting-edge technology and high-tech materials, and has obtained national patent products. It has the principle of heat reflection and heat conduction, which saves more than 15% of energy and has a longer service life than ordinary heating tubes.

4. Control part: The temperature of each section can be independently controlled and displayed. The temperature control system is equipped with PV and SV digital display windows. It adopts module continuous buffer output to control the heater and adopts silicon controlled rectifier output. Subverting the traditional zero-crossing trigger caused by the impact of large instantaneous current impact and large temperature fluctuations, which can make the output voltage change smoothly and linearly, the temperature control effect is more stable, and the performance is more excellent. (The output power can be automatically adjusted according to the temperature error. (Size) to make the temperature more accurate. The dual thermostat control is equipped with an over-temperature upper limit thermostat to prevent damage to the product due to the loss of control of the main thermostat. The functions include PID self-tuning calculus control, automatic constant temperature, over-temperature alarm, Leakage protection, motor overload protection and other functions; equipped with an emergency stop button to ensure safety.

5. Air duct design: Design the air return duct. After heating, the air is pumped and pressurized and sent to the furnace by the fan, so that the hot air can be dissipated into the entire tunnel furnace, so that the cold air outside the furnace cannot enter the furnace body to save electricity. purpose. The double inner layer of the furnace cover is equipped with air troughs, the heating tube is built in the air trough, and the split plate adjustment device is designed to make the temperature in the furnace more uniform; each section of the furnace cavity is equipped with an independent temperature control system, which is convenient to set different temperatures.

6. Exhaust system: The oblique exhaust plate is designed at the discharge port to prevent the cold air from entering the furnace from entering the furnace.

The hot air in the furnace is not easily discharged out of the furnace, so as to ensure the storage of heat.

7. Heating device: The heating tube is installed above the conveyor belt, and the installation height of the heating tube can be adjusted arbitrarily according to the height of the baked goods (adjustment range 0-100mm), so as to reduce the baking space and achieve the effect of energy saving and electricity saving. In addition, each heating tube is equipped with a heat-reflecting material, which has the function of reflecting light, heat and heat accumulation, and the heat energy utilization rate of the system is as high as 30%.

8. Transmission part: adopts Teflon mesh belt with a small roller in the middle. The head and tail are equipped with adjustable active rollers. The conveyor belt is equipped with positioning and automatic positioning devices to prevent the mesh belt from running away. A ø11mm stainless steel round steel is installed as the mesh belt reinforcement at a distance of 600 mm, and a speed counter is installed.

9. Suction device: The new tunnel furnace is equipped with a suction device under the mesh belt to prevent the workpiece from rolling, bending, deforming and other undesirable phenomena during the baking process on the mesh belt.

10. Cooling system and static elimination device: According to the performance requirements of Pu membrane switch products, design the cooling system and static elimination device.

Four, structure configuration

                                                                                        Internal structure of electric box

Electric box control panel

1. Alarm light 10. Temperature control meter A

2. Buzzer 11. Heating A

3. Fault alarm 12. Blower A

4. Speed governor 13. Temperature control B

5. Over temperature alarm 14. Blower B

6. Emergency stop switch 15. Heating B

7. Main power switch 16. Current A

8. Mesh belt operation 17. Current B

9. Exhaust fan

                    Thyristor                                 Exhaust system