Strip heaters, Band heaters, tubular heaters are commonly used heaters in moulding companies. In recent decades, the moulding companies have turned to a preeminent territory with a respectable base. To make a moulding of different materials top Industrial heaters have played an ample role. Industrial heaters aid in processing plastic by moderating material to the shape into the required form and inevitably into the products usually used. Hence, picking the right equipment can support the goal of higher productivity and higher yields.
Types of Heaters used in moulding
The moulding companies use four different band heater types, which includes: ceramic insulated, mica, extruded aluminium and high watt density. Each type holds its own advantages and disadvantages, and all are available with various clamping options. Choosing the precise type for your application is a matter of meeting your process and budget demands with the heater that adequately meets those specifications.
Utterly different in composition from the mica band heater, ceramic insulated band heaters have a folded nickel-chrome resistance wire into miniature ceramic blocks. The ceramic sections are then laid inside a stainless steel outer housing lined with ceramic fibre insulation. The accommodation has serrated edges to allow the band to expand during installation fully.
Individual to the group, ceramic bands employ radiant preferably than conductive heat change. Therefore, ceramic bands do not require a snug fit on the barrel; in fact, a very snug fit may crack the ceramic pieces as they press on the barrel. The radiant heat shift also allows ceramic bands to be used more efficiently on large calibre barrels, on the grounds the heater is not exposed to melted plastic or oil. Materials such as these can pollute the heater due to its open design.
Mica bands are conductive heaters; touching the surface to be heated is essential to assure long life. Functional sheath temperatures should not beat 850F. Maximum watt density ranges by manufacturers, but the average of it is 35 W/in2. On minuter mica bands, the watt density usually can go somewhat higher. If the application needs higher temperatures or watt densities, it should select another type of band.
Such band heaters are composed with nickel-chrome resistance wire wound around a mica film, then located within two additional mica sheets. Mica is used because it gives excellent thermal conductivity and dielectric power. The nickel-chrome resistance wire and mica sheets then are enclosed by a corrosion-resistant outer steel sheath.
High Watt Density Bands
Like mica bands, such high watt density bands are conductive heaters. However, their inner construction grants much more powerful work temperatures and watt density ratings: Sheath temperatures can reach 1,400F while watt densities vary from 80 to 150 W/in2, depending on the band’s physical properties. Generally, miniature diameter bands can function at higher watt densities than more big diameter units.
Choosing the top heater for a precise application can aid the goal of higher potency and more magnificent yields. Band heaters offer high-quality heating and temperature range at a very economic price.