Entformungstemperatur
English translation: demo(u)lding temperature // ejection temperature
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| 14:41 Oct 13, 2008 |
| German to English translations [PRO] Tech/Engineering - Manufacturing / Assembly and production | |||||||
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|  Selected response from: Steffen Walter Germany Local time: 00:31 | ||||||
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| 3 +3 | demo(u)lding temperature // ejection temperature |
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| Discussion entries: 4 | |
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Answers
33 mins confidence: 
peer agreement (net): +3
peer agreement (net): +3demo(u)lding temperature // ejection temperature Explanation: Despite the different materials being treated here, this might still be a "demo(u)lding temperature" (the term is also used in plastics/composite manufacturing). See examples at http://www.thefreelibrary.com/Material recycling of RIM-poly... ("Demolding temperature 180 - 190 [degrees] C") http://www.freepatentsonline.com/EP0998859.html "It is envisaged that in some, but not all, methods of carrying out the invention the mould can be cooled to below the glass transition temperature of the polymer. For example, with a semi-crystalline polymer, the processing temperature could be around 250 DEG C and the ***de-moulding temperature***, i.e. that to which the mould is cooled could be of the order of 120 DEG C, which is above the glass transition temperature of nylon which could be above the glass transition temperature of the polymer, for example Polyamide, which has a glass transition temperature below 70 DEG C. Alternatively, for an amorphous polymer, such as polycarbonate, the ***de-moulding temperature*** would have to be less than the glass transition temperature of the polymer." Depending on the design of the process your specification relates to, "ejection" might be another equivalent to "Entformung", so that you might also consider "ejection temperature" if it fits better. See (IMHO context-relevant) examples of use of "ejection temperature": http://www.thefreelibrary.com/Nylon 6,6 adhesion to natural ... "A significant economic advantage in building tires with nylon 6,6 is the opportunity to cure more tires per day from a single mold by curing faster. The higher curing temperature of faster cures (e.g. 340 degrees F) cannot be tolerated by nylon 6 without significant loss in cord strength. The reason for this is the appreciably lower softening point of nylon 6 (320-381 degrees F) vs. nylon 6,6 (446-464 degrees F). At a tire cure ***ejection temperature*** of 340 degrees F, the strength loss of a nylon 6 cord (ref. 14) is about 10% even at a low cord moisture content of 1-2%. Strength losses become even greater (30%) at higher cord moisture levels (5-6%)." http://www.astm.org/Standards/D5592.htm "1.4 It should be noted that for some of the desired properties, no ASTM or ISO standards exist. These include pvT data, no-flow temperature, ***ejection temperature***, and fatigue in tension. In these instances, relying on available test methods is suggested." -------------------------------------------------- Note added at 1 hr (2008-10-13 15:54:00 GMT) -------------------------------------------------- As you certainly know, I am in no position to really answer your added question but "Entformung" can hardly mean anything else in the context of materials processing (IMHO). This is best clarified with the client, I think. |
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