Hot runner nozzle - Günther Heisskanaltechnik ...

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Injection Fig. Injection into an intermediate gate www.guenther-hotrunner.com 4/11 Subject to technical changes ØD L Ød 1 mm > ØD ˜ Fig. Gating into an angled surface catch pits advantageous advantageous disadvantageous iT Correct injection into an intermediate gate In order to obtain defined separation, the aperture in the face surface of the intermediate gate Ød should be larger than ØD. This is particularly true for reinforced thermoplastics (engineering plastics). If possible, employ a catch pit in the intermediate gate. Gating into an angled surface Direct gating into an angled surface never results in an optimal gate point with a small vestige. We therefore recommend gating into a surface at right angle to the nozzle axis. 1.4. 20
Tempering 1.4. 21 iT Fig. Reserve gating into a high gloss facing surface Fig. Parts with a film hinge Insert Film hinge Tempering Gating Reserve gating into a high gloss facing surface Sufficient cooling is recommended for the gate area, next to the nozzle and on the ejector side to dissipate the heat additionally induced by shear. The cooling circuit control must be separated from the other tempering circuits. Articles with a film hinge When gating a part with a film hinge, the gating point must be located away from the surface center opposite to the film hinge. The flow front may not come to a standstill during the filling process. The film hinge must be filled last. www.guenther-hotrunner.com Subject to technical changes 4/11
Page 1 and 2: Index Materials 3 Reference values
Page 3 and 4: Materials Reference values for maxi
Page 5 and 6: Materials Determining the gate diam
Page 7 and 8: Materials Material PP PE PS ABS SAN
Page 9 and 10: Gating Fig. Gate geometry H [mm] 4,
Page 11: Gating 0.5 At 250°C the hot runner
Page 15 and 16: Thread designation Regular type scr
Page 17 and 18: 1.4. 33 iT Thickfilm heaters for ho
Page 19 and 20: 1.4. 35 iT Assembly of the star man
Page 21 and 22: Valve gate technology Fig. Valve ga
Page 23 and 24: Valve gate technology Lifting plate
Page 25 and 26: Hot runner systems / manifolds www.
Page 27 and 28: Hot runner systems / manifolds Air
Page 29 and 30: Hot runner systems / manifolds Mani
Page 31 and 32: Hot runner systems / manifolds Comp
Page 33 and 34: Fig. Delta Tool calculation program
Page 35: Fig. Seminars for designers and use

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