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Drying ovens are used across a range of industries and research laboratories for simple applications, such as drying and sterilizing glassware, to complex processes that require controlled heating and temperature uniformity such as bonding and curing.
Drying ovens generally operate from ambient heat to 538C (1000F.) Drying ovens may be designed for batch processing or with a conveyor for continuous processing. Despatch Industries builds high performance drying ovens of multiple sizes, processing requirements and temperature capabilities to meet and exceed clients laboratory and production applications.
Despatch offers options for drying ovens that include HEPA filtration, inert atmosphere and Class A clean process capabilities. All drying ovens feature programmable controls and stainless steel interiors to prevent corrosion.
When selecting the right drying oven, critical factors to consider are the heat-up, soak and cool-down times required within your application.
Heat-up ratesA drying oven should have the capability to heat the part or material to the desired temperature within a specific time. Even if the ovens heating capability is sufficient, there are other factors that are just as important:
Soak TimesSoak time is the amount of time that the material requires once it reaches the desired temperature for the desired length of time. For applications that require precise temperature controls, Despatch Industries offers drying ovens with programmable controls that do not start timing the soak cycle until a set point temperature, either within the product or within the oven chamber, has been reached.
Cool-down TimesCool down is achieved when the heated air is exhausted out from the drying oven, replaced by cooler, ambient air. Programmable controls c
Heat treating is the heating and cooling of metals and alloys to achieve a desired physical and mechanical property such as strength, hardness and resistance to fatigue or failure. Heat treating is a precise science that is made more complex by the varying properties of metal alloys. Understanding the properties of the material being heat treated is critical to achieving the desired outcome. Often times multiple heat-treating steps are necessary to produce the properties required for the final product.
Benefits of Despatch ovens and furnaces for heat treating:Heat treating often requires processing at high temperatures for extended periods making energy efficiency a high priority. Despatch ovens and furnaces have thick wall insulation, heavy-duty high temperature door gaskets and air that is recirculated through the heater box and back into the chamber for greater energy efficiency.
The consequence of uneven heat distribution during heat treating can be disastrous. Choosing a Despatch oven or furnace will ensure you that temperature uniformity will be well within specification. Despatch ovens feature high velocity uniflow airflow, meaning that the air moves both horizontally and vertically, offering exceptional temperature uniformity. Adjustable louvers direct heated air for a precise airflow pattern suited to specific parts.
Despatch ovens are available with a gas or electric heater and are available with Class A (NFPA 86) flammable solvent handling capabilities. They are built to withstand the rigors of industrial metal manufacturing with sturdy, welded, double wall construction.
Processes performed by Despatch ovens and furnaces:Annealingproduces a uniform microstructure and softens metal to improve machinability.(For information on annealing plastics visit ourannealing page)
Stress Relievingreduces internal stresses in metal caused by cold working or non-uniform cooling.
Aging, also referred to as precipitation hardening increases the hardness and strength of metal alloys. Both timing and temperature are critical during the hardening process. Uneven heating can create cracks and other defects, often starting from the corners or edges of the material. Materials that have been unevenly cooled, or soaked, can cause dark, vertical cracks that are irreparable.
Temperingis a process used to reduce the brittleness and increase the tensile strength of metal alloys after hardening.
Custom Heat Treat FurnacesPNF Inert Atmosphere Oven for Aging Beryllium CopperDespatch received an order for a PNF Inert Atmosphere Furnace for its beryllium copper aging process. A precondition of the order was that a test be performed to confirm that a uniformity of +/- 10 at 1000 could be maintained.
A Despatch engineer was sent to the customers facility to perform a field nine-point temperature uniformity test on the Despatch furnace currently in use. The oven was programmed to ramp and soak at three different temperatures and data collected. The furnace performed even better than expected with temperature uniformity between +/- 4.3 and 6.8 (2.4 and 3.8). The furnace is designed with adjustable recirculating air louvers that allow fine tuning to ensure uniform airflow.
Despatch offers a selection of benchtop, cabinet, walk-in and conveyor ovens that are ideal for curing applications. Despatch curing ovens offer fast ramping and cool down rates for maximum productivity, short cycle times and consistent, reproducible curing processes for all product loads.
Curing ovens are used for a variety of applications involving coatings, adhesives, rubber and thermoset plastics and composites. The electronics and semiconductor industries use Despatch clean process ovens for epoxy curing and polyimide curing. Despatch specializes in polyimide curing ovens that are designed to meet the unique process requirements for hard baking polyimide coatings in an inert atmosphere.
Despatch curing ovens are designed to provide tight temperature tolerance and precise control for repeatable results and uniform airflow that ensure proper curing across an entire load. The ovens are exhausted to effectively remove the VOCs given off during curing, ensuring a safe environment. Best-in-class energy efficiency is achieved with superior insulation and cabinet design as well as recirculating airflow management. Despatch offers gas or electric batch ovens for curing small to very large loads and conveyor ovens with multiple zones for continuous processing. If your process requires a custom solution, we can work with you to create a configuration that suits your specific needs.
Composite CuringDespatch offers a wide range of standard and custom ovens for composite curing. The ovens provide uniflow airflow which delivers heated air from both sides of the chamber for uniform operating temperatures. Typical applications include curing filament-wound composites used in products such as light weight pressure vessels, and curing the composite components of wind turbine blades. Despatch is an established supplier of vacuum bag composite curing systems with numerous systems installed at many of the major aerospace manufacturers.
Conveyor Oven for Curing Eyeglass Lens CoatingsAn optical manufacturer needed a conveyorized thermal processing oven to dry the coatings on its eyeglass lenses. Despatch designed a custom PC Series conveyor oven with HEPA filtration to meet the customers requirements for high-volume production while maintaining a clean internal atmosphere.
The conveyor oven operates at relatively low temperatures and was designed to be compatible with the customers robotic loading equipment. The PC Series Conveyor Oven features superior temperature uniformity with temperatures up to 260C (500F). Conveyor speeds are variable and Class A models are available.
Despatch Conveyor Ovens are designed for process versatility and reliability. They achieve superior air temperature uniformity on all interior parts due to high-volume, vertical down airflow. The continuous belt design is ideal for large quantities of similar work pieces being processed. Typical applications include pre-heating, curing, bonding, drying and heat treating. Options include Class A models specifically designed for flammable solvents and a HEPA (High Efficiency Particulate Air) filtered model for applications that require Class 1000 cleanliness. These ovens provide extremely consistent and repeatable process results.
PCC1-75 Small Conveyor
Dubai, United Arab Emirates 