The split cartridge heaters are created particularly for platen, die or mold heating applications where the holes are poorly drilled or worn through age. Independent increase of each area of the SST and QST when energized, creates intimate contact with the wall of your hole. SST Insertion Heaters possess a single split over the length. The two sections expand in opposite directions. Conductive heat transfer is fantastic. The QST, or Quad, has additional sections that expand in four directions. Surface contact is better than any available insertion heater. The easy internal design of your SST and QST generates a uniform linear temperature profile.
Possibly the most outstanding feature is the way easy the SST and QST Split Sheath Insertion Heaters are pulled from the hole for replacement or other servicing requirements. Since the temperature cools, the sections contract, allowing the SST and QST to slip in the hole without difficulty. In platens and presses utilizing long, cartridge heaters, Ogden’s split sheath design is effective in reducing down-time and maintenance costs. Where repair or redrilling of the hole will not be practical, the SST and QST offer outstanding performance.
Thermal gradients exist along the length and round the circumference of standard sheathed cartridge heaters. These temperature differentials might cause increased camber, causing the heater’s seizing or binding inside the holes. Removal is normally difficult and damage to the inside walls of 64devppky hole can happen. The uniform temperature profile from the SST and QST allow the separate sections to evenly expand and contract. Removal is not difficult.Conductive heat transfer by cartridge heaters in oversized holes is restricted to where surface contact exists. Sheath expansion has limitations.
Expansion of the this heat band when energized is significant, improving heat transfer. Diameters are nominally .005? undersized for maximum expansion in standard applications with a fit of .005? – .007?. Where an inconsistently drilled or worn hole creates larger fit considerations, the SST Split Sheath Heater offers exceptional performance. The QST, or Quad’s effect is just like the SST with all the exception that we now have four separate sections (D). Conductive heat transfer is preferable over any available insertion heater.