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Hot-runner mold inserts offer cooling enhancement.


[ILLUSTRATION OMITTED]

Improved cavity cavity /cav·i·ty/ (kav´i-te)
1. a hollow place or space, or a potential space, within the body or one of its organs.

2. in dentistry, the lesion produced by caries.
 filling and cooling are the aims of a new line of inserts for hot runners A hot runner is an injection mold component containing a series of channels that distributes molten plastic within a mold to increase molding productivity through reduced waste, as the runners arent wasted each cycle by being ejected, as the plasic stays molten and gets used on the  that are made by "selected laser melting" (SLM See service level management system and spatial light modulator. ) of H-13 steel powders. Developed by HRS-Flow HotRunner Technology in Italy (represented here by HRS hrs abbr (= hours) → h

hrs abbr (= hours) → Std. 
 Hot Runner System NA Inc., Windsor, Ont.), the SLM inserts are built up in thin layers of metal powder, so they can incorporate conformal con·for·mal  
adj.
1. Mathematics Designating or specifying a mapping of a surface or region upon another surface so that all angles between intersecting curves remain unchanged.

2.
 cooling channels to achieve more uniform temperature distribution. The SLM process reportedly yields a 99.5%, dense insert with a hardness of 35 to 54 Rc and mechanical properties nearly identical to forged steel.

Users can order the SLM insert in a hybrid style where the insert is built up on a forged base. SLM inserts are warranted for life against fatigue and can be used anywhere in the tool, even near a gate. Conformal cooling channels can be positioned as close as 0.5 mm to the cavity surface. SLM inserts with conformal cooling are said to guard against stringing, reduce stresses in parts, produce unblemished part surface, and shorten cycle time.

(519) 973-0212 * www.hrsflow.com
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Title Annotation:keeping up: injection molding
Publication:Plastics Technology
Date:Aug 1, 2008
Words:184
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