Hot runner nozzle - Günther Heisskanaltechnik ...

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Notes on valve needles The needle length is dependent on the nozzle length, type of actuation and manifold structure. The needles have a basic hardness of 64 HRC (HSS steel) and are coated. The needles are fitted with a cylindrical seal towards the cavity and are adjustable. The 2 mm Ø needle design for nozzles with material tube-Ø 4-6 mm, threads M6x 0,5 gate-Ø: 0,8 mm, 1,0 m, 1,2 mm, 1,4 mm, (1,6 mm). The 3 mm Ø needle design for nozzles with material tube- Ø 8 mm, threads M8 x 0,5 gate Ø: 2,0 mm, 2,5 mm. The 5 mm Ø needle design for nozzles with material tube- Ø 10-12 mm, threads M10 x 0,75 gate- Ø: 3,0 mm, 4,0 mm. Tools to disassembling the needle guide (piece of PM), see chapter 7. Needle Ø Thread Tightening torque M A [Nm] Ø 2 mm M6 x 0,50 15 Ø 3 mm M8 x 0,50 30 Ø 5 mm M10 x 0,75 45 Type NEP Type NHP 1.4. 43 iT Thread tightening torque for needle adjustment Maintenance Fig. Sliding cam mechanism with externally accessible grease fittings Valve gate technology Sliding cam mechanismus -ANES- When fitting the sliding cam mechanism, use a hightemperature long-life grease to lubricate the movable parts. This allows the sliding cam mechanism to work without any problems even at higher temperatures over a long period of time. Make sure the mould temperature does not exceed 100° C in the area of the frame plate/ clamping plate. During maintenance the sliding cam mechanism must be checked for dirt and wear. Melts that have exuded from the manifold sealing because of the stroke movement of the needles must be removed. In older hot-runner systems the sliding cam mechanism can be relubricated through the ball impact holes (DIN 3410 Form F); in new systems the sliding cam mechanism can be relubricated without disassembly. Fig. Ball impact holes To ensure optimal greasing performance also at higher temperatures, avoid using different greases. We recommend the lubricating grease from Klueber Barrierta L55/2 high temperature long-life grease. The lubricating grease can be purchased either directly from the manufacturer or from us. Safety data sheets can be called up at www.klueber.com. Introduction: Lubrication after 150.000 shots or 1x weekly. Maintainance work (cleaning) must be done on the needle-driving mechanisms every 400.000 shots! This frequency depends greatly on the material to be processed or the application. If a thermoplastic elastomer (TPE) is being processed, it may be necessary to do maintenance work on the sliding cam after just approximately 200.000 shots. This also concerns polymers, in which the viscosity is greatly reduced by the shearing. www.guenther-hotrunner.com Subject to technical changes 4/11
Hot runner systems / manifolds www.guenther-hotrunner.com 4/11 Subject to technical changes V2 iT NEW: Sign up at www.guenther-hotrunner.com to start configuring your individual hot runner system with CADHOC V2 System Designer. You will save time and cut costs by having detailed information at an early phase of your project. NEW: Hot half on the basis of the • • • 8-cavity H manifold“ 2-cavity straight manifold" and 4-cavity cross manifold" For mould size up 196x296 mm to 796x996 mm (depending on the manifold size and manifold design). Hot half as 2-plate system, incl. guide elements, cable duct, cooling etc. NEW: Hot half as 2-plate system, incl. guide elements, cable duct, cooling etc. All system nozzles with a tip and an open nozzle piece can be used (Catalogue Chapter 2.1). NEW: Valve-gate systems with single needle valves for “individual” types of manifold. • Straight manifold 1-cavity, 2-cavity und 4-cavity • H manifold 4-cavity and 8-cavity, • T manifold 2-cavity and • Cross manifold 4-cavity with nozzles from our valve gate portfolio. Catalogue Chapter 2.3). 1.4. 50
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 and 22: Valve gate technology Fig. Valve ga
Page 23: Valve gate technology Lifting plate
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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