This happened more than 30 years ago so I can tell the story. I worked at a kibbutz factory in Israel where we made plastic faucets by injection molding. The correct adjustment of the temperature profile of the molding cycle was critical to many characteristics of the finished parts.
Our engineer was going to Germany to demonstrate some products, so we carefully tested his samples so that he would not be embarrassed in front of the quality-conscious Germans. At the demonstration, he turned the knob on the hot-water side of the faucet: snap. Then he tried the cold-water side: snap. Both stems broke off neatly inside the faucet! The German engineers were not amused. Ultimately we learned how to adjust the molding machines properly! On 6/24/2011 7:12 AM, hb9ari wrote: > Hello Guy, > > I think that you have found the good explanation! > > May be some of these knobs don't get a correct or sufficient pre-aging (?) > procedure before leaving the factory; at my QRL pro, we get this kind > of problem with molded plastic enclosure breaking some time after > they were bee assembled. > > In French, we are speaking of "retrait" but i don't find > the correct translation! > > My best 73, > Rudi, HB9ARI -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
