Seoul -- DUT Korea has revealed a plan to commercially launch its lower-pressure high performance mixhead - designated DTRC - in 2015.
Hans Cheol Jung, marketing director, DUT Korea, spoke to UTECH-polyurethane.com on the fringes of the Korean Polyurethane Society 10th Anniversary meeting in late November 2014.
The DTRC mixhead has been used successfully by clients such as Whirlpool and Toyota, said Jung.
It operates at pressures of around 110-120 bar and achieves the same level of mixing and performance that heads operating at around 160 bar are capable of, said Jung.
He added that the DTRC head is designed so that there are more spaces in the mixing chamber, which helps to increase turbulence. This leads to a mixing chamber which “looks a little longer than the previous model,” said Jung. This arrangement allows the mixhead to be more efficient than the firm’s earlier DHV model, he added. Jung continued that he believes that DUT is the first firm to use such a geometry.
The mixing is achieved by positioning the jets for isocyanate and polyol so that they face upwards and backwards and are relatively close to the head of the mixing chamber, Jung explained. He added that this causes a great deal of turbulence and, as the reacting mixture forces its way back past the injection points, a high level of mixing occurs. As the mixture flows back along the other leg of the L-shaped mixhead into the dispenser, the flow is highly laminar, said Jung.
Jung added that the new mixing head allows lower pressure and less expensive compressors to be used to produce high quality components. DUT said it has “certificated its effectiveness from a comparison test with Whirlpool’s refrigerator line and flow analysis has been completed with the Pusan National University.”
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