Batch furnaces are used in industrial processes to heat materials or components for preheating, curing, drying, degassing, and stress relieving. They come in various sizes and heating sources with control units to monitor temperature, airflow, and vacuum levels. They are commonly used for intermediate or post-production functions and can include process-specific features such as vacuum and specialized air circulation systems.
A batch furnace is a heat treatment device used in a variety of industrial processes to achieve process specific heating of materials or components. These processes include preheating various components before applying coatings or finishes. Curing, drying and degassing of finished products are also achieved using a batch oven. Low-temperature stress relieving of parts manufactured with high-temperature machining processes can also be performed in batch ovens, as can firing of coated components. Batch ovens are available in a wide selection of sizes, specific process characteristics and heating energy sources.
Many manufacturing processes require materials or parts to be heated to specific temperatures under specific conditions before, during, or after production. The batch oven is one of the most common devices used to carry out these heat treatments. So named because parts or materials are typically processed in batches, these furnaces are all designed to produce very specific heating conditions to meet the unique needs of the processes in question. Most include sophisticated control units that allow operators to monitor and adjust internal conditions such as temperature, airflow and vacuum levels.
Some of the processes for which the batch furnace is used are preparatory measures used to preheat components or materials before they are sent to other parts of the production line. Preheating MDF and other support materials prior to veneering is a good example of this type of process. In most cases, however, batch ovens are used for intermediate or post-production functions, such as the curing of resin-based composites or the burn-in of electronic components. This type of batch kiln circulates the hot air without causing excessive turbulence or, in some cases, creates a partial vacuum inside the kiln.
Low-temperature stress relieving of parts manufactured using high-temperature processes is a critical function of the batch oven. This process prevents tempering caused by extreme temperatures during manufacturing from causing crystalline defects and cracking in parts. Batch ovens are also used for conventional drying of washed parts prior to coating or other moisture sensitive processes. Outgassing is a function of the batch oven where parts that have absorbed gases during production are heated to release trapped gas. Powder and wet coatings are also often baked in batch ovens to harden the finishes.
Batch ovens are available in a variety of sizes and capacities and can include a selection of process specific features such as vacuum and specialized air circulation systems. Smaller benchtop ovens may have internal volumes of 8 cubic feet (0.23 cubic meters) or less, while heavyweights are often large enough to fit with a forklift. Most ovens are heated electrically or powered by direct and indirect gas burners.
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