How to choose the size of the box type high-temperature resistance furnace chamber?

When choosing the size of a box type high-temperature resistance furnace, factors such as workpiece size and quantity, temperature uniformity, and production efficiency should be considered. The following is a specific introduction:

Workpiece size and quantity: Firstly, it is necessary to accurately measure the maximum size of the workpiece to be processed, including length, width, and height. The selected furnace size should be able to accommodate the largest workpiece and leave a certain space between the workpiece and the inner wall of the furnace. It is usually recommended to leave a gap of 50-100mm on each side to ensure uniform circulation of hot gas and uniform heating of the workpiece. If multiple workpieces need to be processed simultaneously, the placement and quantity of the workpieces should also be considered to ensure that they can be arranged reasonably in the furnace, do not squeeze each other, and do not affect the heating effect. For example, for a workpiece with a length of 500mm, width of 300mm, and height of 200mm, a resistance furnace with internal dimensions of 600mm × 400mm × 300mm can be selected.
Temperature uniformity requirement: Temperature uniformity inside the furnace is an important indicator. Generally speaking, smaller furnaces are easier to achieve uniform temperature distribution during heating because the distance between the heating element and the workpiece is relatively close and uniform. If high temperature uniformity is required, a relatively small furnace should be chosen as much as possible while meeting the size requirements of the workpiece. But if the workpiece size is large, in order to ensure temperature uniformity, a larger furnace with multiple heating zones and circulating fans can be selected. By reasonably arranging heating elements and fans to circulate hot air, temperature uniformity can be improved.
Production efficiency and batch processing requirements: If it is large-scale production, the ability to process workpieces in batches needs to be considered. At this time, a larger furnace size should be chosen to improve production efficiency and reduce heating times. For example, in the heat treatment production line of automotive parts, in order to meet the processing needs of a large number of parts, it is possible to choose a resistance furnace with a larger furnace size, such as a resistance furnace with internal dimensions of 1500mm × 800mm × 600mm. This can process multiple parts at once, improve production efficiency, and reduce production costs.
Space and site limitations: The size of the workshop space is also a limiting factor in choosing the furnace size. Ensure that the resistance furnace can be installed smoothly in the designated location and there is sufficient space around for operation, maintenance, and overhaul. At the same time, the bearing capacity of the factory building should also be considered, especially for large high-temperature resistance furnaces, which are heavy and need to ensure that the factory floor can withstand their weight. If the workshop space is limited, it is necessary to select a resistance furnace of appropriate size on the basis of meeting the process requirements, in order to fully utilize the space.
Future development needs: When choosing furnace size, the company’s future development plan should also be considered. If it is expected that the production scale will expand or the size and quantity of workpieces processed may increase in the future, then within budget constraints, larger furnace sizes can be appropriately selected to avoid unnecessary investment waste caused by equipment replacement due to insufficient equipment size in the later stage.