Heat the plastic in the three screw areas feed, transition and measurement. The heating of the feeding zone is located directly behind the nozzle Mica Band Heater Manufacturer and consists of the first third of the total length of the boiler. The right temperature is 5 to 10 ° C lower than the temperature of the nozzle.
The lower weight increases the buoyancy of the heated liquid, causing it to increase. As the new cooler liquid also heats up, it also increases, continuing the cycle and generating enough movement to form a convective current capable of moving a large amount of heat. Convection is influenced by the permissible wattage densities of the fluid, thermal conductivity and coefficient of expansion.
If the application requires higher temperatures or wattage, a different style band should be selected. Before you start buying belt heaters, you need to pay attention to some information. Industrial belt heaters are often used to heat cylinders such as drums, pipes or nozzles of injection molding and extrusion machines. They are most commonly used in the plastics industry, but other applications apply.
We handle up to 50 urgent requests from our customers each month and have a history of meeting customer appointments over 97% of the time. Are you looking for a reliable partner in the industry to deliver the belt heaters you need at prices you love and with a quick response? Belt heaters made of micanite or ceramic coated with sheet metal are used for contact heating in injection/extruder machines and for heating containers, tanks, etc. Backer Marathon Starflex belt heaters are the most robust and reliable belt heaters on the market. They are the original tape of the aluminum housing and remain the industry standard. This belt heater enjoys wide acceptance due to its extremely long and reliable service life properties.
At the same time, you need to make sure you find the right heating system for your needs, so learn more about these industrial heaters below. The ceramic heating mat, together with the ceramic fiber insulation, is housed in a stainless steel housing with jagged edges, providing maximum flexibility for easy installation. Watlow’s mineral-insulated® belt heater is a high-performance heater that incorporates Watlow’s unique mineral insulation. This material offers much higher thermal conductivity than mica and hard ceramic insulators used in conventional heaters. Mica tape heaters consist of a nickel-chromium resistance wire wrapped around a layer of mica, which is then placed between two additional mica blades.
It’s as easy as putting the strap or clamping mechanism back on. You’ll probably be surprised how long a mica tape heater will have if it’s pulled in frequently. It’s helpful to start with your application and temperature requirements. Each belt heater has its own unique characteristics, but you need to know the acceptable levels of each function before making your selection. The most common features for comparing belt heaters are durability, process temperature, start time, heating life, belt size and cost. These will help you determine whether a heater is cost-effective, able to provide the temperature you need, and whether it physically fits around its cylindrical component.
Due to the low thermal conductivity of the ceramic fiber insulation, the outer surface temperature of the ceramic tape heater is about 400°F, while the internal surface temperature is 1200°F. Ceramic belt heaters transfer heat through both conduction and radiation. Because of this effect, the adjustment is not as critical as with other types of bands.
The “Ultra-Thin” without thermal insulation and with perforated jacket is ideal for air-cooled systems. The “Ultra-Thin” has reached a jacket temperature 100 degrees F lower when tested against other high-temperature heaters at cylinder temperatures of 600 degrees F. The thermal insulation of the back is highly efficient and results in minimal heat loss and lower jacket temperature. Ribbed cast belt heaters can be designed to meet the mechanical and physical limitations of existing extruder cover systems. They are manufactured to customer specifications for OEMs and maintenance applications. Cast belt heaters with aluminium fins are used as an alternative to liquid-cooled casting belt heaters for heating and cooling plastic extruder runs.