Hot runner nozzle - Günther Heisskanaltechnik ...

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1.4. 41 iT Insulation ring Power connection Fixed thermocouple connection Power connection Fixed thermocouple Fig. Single valve-gate nozzle 12NEST Scew M10x1 There are three 0.1-mm shims over / under the needle head. Caution When assembling / dismantling the needle holder (A/F 10), care must be taken not to deform the steel piston rings. Use the flat of the piston! It is essential to put the metal O ring back in after replacing the disk package. The piston and/or the steel piston rings must be greased again before assembly (GÜNTHER recommends Klüber paste UH 196-402 [NSF registered]). Furthermore, it is essential to ensure that the steel piston rings have been inserted correctly. The rings have a marking (XXX) on the face surface, indicating the side that must point towards the pressurised side. Installation of the complete nozzle The cables for activating the needles are located at the bottom of the nozzle. Accordingly the centring ring can be produced as a “bell”. This measure makes it possible to reduce the height of the mould. Screw centring with at least 4x M12 (10.9) screws, with due consideration to lift forces. For an optimum thermal separation between the nozzle and the mould, use the (blue) insulation ring. Caution: Grind in the K dimension in compliance with the data in the chapter. 2.3 yellow page. Needle closing Needle opening Valve gate technology Steel piston ring, large Marking XXX Steel piston ring, small Marking XXX Inlet/ outlet pipes for activating the needle It is preferable to use channels with diameters of 6 mm and a minimum length of 200 mm. The inlet and outlet lines must be placed in the cooled mould plate in order to prevent the medium overheating. If the mould temperatures exceed the thermal stress capability of the pneumatic valves, a separately cooled manifold must be installed. The mechanics of the needle drive and the valve gate nozzle are absolutely capable of withstanding high temperatures. Note on guarantee GÜNTHER guarantees nozzle type NEST only if they have been fitted or serviced on GÜNTHER premises or by a GÜNTHER specialist. GÜNTHER will not provide any guarantee for damage caused by the incorrect fitting of the steel piston ring operated nozzle type NEST by the pur-chaser, its representatives or contractors. The same applies to inappropriate or neglected maintenance. www.guenther-hotrunner.com Subject to technical changes 4/11
Valve gate technology Lifting plate mechanism ANEH The lifting mechanism is recommendable for a precisely simultaneous opening and closing of all needles. Special holes in the mould clamping plate allow the down-stroke depth of the valve needles to be adjusted individually from the outside. The maximum working temperature is 100° C. www.guenther-hotrunner.com 4/11 Subject to technical changes Electromagnet ME 10/UV75 The ME 10 bistable heavy-duty lifting magnet serves to actuate the valve gate needles in valve gate systems. Excellent for fully electric injection moulding machines and for clean room use. Single needle valve ENV Needle actuation in single and multiple systems. Sequential opening and closing of the needles. Special holes in the mould clamping plate allow the down-stroke depth of the valve gate to be adjusted individually from the outside. Maximum working temperature is 100° C. Pay attention to the balancing of the oil feed and oil outlet ducts as well as of the air feed and air outlet ducts. Note on guarantee GÜNTHER guarantees single needle valves only if they have been fitted or serviced on GÜNTHER premises or by a GÜNTHER specialist. GÜNTHER will not provide any guarantee for damage caused by the incorrect fitting of the O-rings in hydraulically/pneumatically operated single needle valves by the purchaser, its representatives or contractors. The same applies to inappropriate or neglected maintenance. Note: See operating instructions for details. Sliding cam mechanism ANES iT For narrow cavity spacing a sliding cam mechanism is the preferred drive. Exact opening and closing of all needles. Special holes in the mould clamping plate allow the down-stroke depth of the valve gate to be adjusted individually from the outside. Maximum working temperature is 100° C. 1.4. 42
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 and 12: Gating 0.5 At 250°C the hot runner
Page 13 and 14: Tempering 1.4. 21 iT Fig. Reserve g
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: Valve gate technology Fig. Valve ga
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

Hot runner nozzle - Günther Heisskanaltechnik ...

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