Abstract: An automatic vacuum drying device comprises a drying oven, a heating device used to heat the drying oven, a vacuum extraction device used to evacuate the drying oven, a nitrogen input device used to input nitrogen into the drying oven, and a transporting device located inside the drying oven and used to transport materials, two first openings are located at two opposite sides of the drying oven, an automatic sealing door is mounted on at least one of the first openings, the automatic sealing door includes a first door plank and a second door plank parallel to the first door plank, an elevator structure is located between the first door plank and the second door plank, the elevator structure is used to lift the first door plank and the second door plank.

Abstract: An automatic vacuum preheating furnace comprises a furnace box, a vacuum extraction device used to evacuate the furnace box, a transporting device located inside the furnace box and used to transport materials, two opposite end of the furnace box have an opening respectively, an automatic sealing door is located on the opening, the automatic vacuum preheating furnace further includes preheating devices, each preheating devices includes a blasting device which is located under the furnace box and connected with the furnace box, and a wind returning device which is located upon the furnace box and connected with the furnace box, each blasting device includes a heating unit and a wind adjusting unit.

Abstract: An automatic vacuum preheating furnace comprises a furnace box, a vacuum extraction device used to evacuate the furnace box, a transporting device located inside the furnace box and used to transport materials, two opposite end of the furnace box have an opening respectively, an automatic sealing door is located on the opening, the automatic vacuum preheating furnace further includes preheating devices, each preheating devices includes a blasting device which is located under the furnace box and connected with the furnace box, and a wind returning device which is located upon the furnace box and connected with the furnace box, each blasting device includes a heating unit and a wind adjusting unit.

Abstract: An automatic vacuum drying device comprises a drying oven, a heating device used to heat the drying oven, a vacuum extraction device used to evacuate the drying oven, a nitrogen input device used to input nitrogen into the drying oven, and a transporting device located inside the drying oven and used to transport materials, two first openings are located at two opposite sides of the drying oven, an automatic sealing door is mounted on at least one of the first openings, the automatic sealing door includes a first door plank and a second door plank parallel to the first door plank, an elevator structure is located between the first door plank and the second door plank, the elevator structure is used to lift the first door plank and the second door plank.