Abstract
The thermal fluorine spraying process is a low cost and convenient lining process which replaces the traditional large furnace baking process. ln this study, the Quality Engineering approach was applied to find the optimum spraying conditions to obtain strength, uniform surface, and good adhesion property. ln the process, accelerated resin powder sprayed from a gun melts by the oxygen/propylene flame, collides on base plate, mixes and accumulates to form a sprayed layer sheet. The adhesive property to created by so-called "anchor effect" : the effect resulted by a non-smooth plate, A good water repellent property can beobtained if the resin particles are well mixed and thefinished surface is smooth. At the stage of discussing the generic function of this process, it was forecasted that when a uniform sprayed film were pulled, the elongation might be proportional to theload as in the case ofmetal. Therefore, the generic function was defined as "the elongation of a sprayed film is proportional tothe load per sprayed length and the number of sprays". There are three signal factors : sprayed length, number of sprays and load. An L18 was used to assign control factors. Dynamic SN ratio experimental results. From the confirmatory experiment, the gains on SN ratio and sensitivity were both well reproduced. At the same time the appearance was improved.
