MoldMaking Technology

JUL 2018

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Hot Runners Pages 5 to 11 moldmakingtechnology.com 43 Hot Runners Pages 33 to 44 Needle Valve System without Control Unit Meets Quality Requirements The servo driven FLEXflow One needle valve systems for hot runner nozzles from HRSflow have a simple driver module that is designed to replace an otherwise neces- sary control unit. This module comes with a default setting that fully opens and closes the needle. Using an External Smart Interface (ESI) that is connected for this purpose, needle stroke and velocity can be individually set for specific applications, even when there are multiple steps. Technicians can individually program as many as 24 valve pins per system using this ESI. HRSflow says that once these parameters have been saved in the driver module, the system is ready to produce high-quality molded parts consistently without a control unit. As an additional safety factor, the needle valve system comes with a maximum torque for the servomotor when manufacturing occurs. When the maximum torque value is reached, the electronics shut down to prevent dam- age to the hot runner system and mold. The FLEXflow One system is connected with a Safety Interface Box (SIB) that communicates with the injection molding machine's controller, which is designed to ensure safe working conditions. HRSflow says that the FLEXflow One needle valve system does not require an additional control unit for operation. The company says that it provides high-quality part performance, reduces clamp force, has a wider process win- dow, ensures the reliability and repeatability of the process and has the same connection from the IMM for the sequential control as traditional hydraulic and pneumatic hot runners. HRSflow / 519-973-0212 / hrsflow.com Compact Nozzle Enables Injection on the Inside Surface of Part Thermoplay's newly expanded small nozzle series features the F Ø11. Designed to meet the increasing requirements of special applications in cosmetic, medical and food packaging markets, the nozzle features a small pitch and is now available for valve gate applications. The F Ø11 valve gate nozzle has a minimum pitch of 17 mm. Because of its compact profile, the nozzle is useful in restricted areas and enables injection on an "inside" surface of the part. The nozzle and tip design enable low thermal dispersion, giving maximum flexibility to the moldmaker in designing the cooling system. The patented Thermoplay heaters uniformly distribute heat along the whole nozzle surface, providing low energy consumption (at 150W maximum per noz- zle). Thermoplay says that the moldmaker can easily replace the tip for mainte- nance with the mold installed in the injection machine. Valve-gate actuation can be pneumatic or hydraulic, individual- or plate-actuated, which Thermoplay says makes the nozzles useful for high-cavitation applications requiring increased precision. The pin, available in a cylindrical or conical option, is designed to mini- mize the witness mark on the part (gate diameter from 0.8 to 1.2 mm) providing the highest quality finish. Thermoplay says that the FØ11 valve gate nozzle series combine flexibility and quality and are available in lengths from 56 to 146 mm. Thermoplay S.P.A. / 39-125-800311 / thermoplay.com Hot Runner Certification Deepens Knowledge and Sharpens Skill Studies by hot runner makers show that 60–75 percent of all molds that are built today incorporate a hot runner system. The MoldTrax Hot Runner Certification course gives participants a better understanding of typical hot runner components and critical areas in maintenance. The course also covers the situations that warrant project management and how often that should occur, and it covers the effects of heat expansion. Other topics include bench techniques for work on hot runners, strategies for safety and strategies for minimizing mistakes that cause systems to be "flooded" or "encapsulated." The course covers electrical issues like heater and thermocouple testing, removal and replacement and the proper use and care of cables, connectors and controllers. The Moldtrax training includes input from industry experts who have been designing, cleaning, repairing and running all types of hot runner systems for decades. The level of training for each attendee is evaluated by asking the participant questions to assess his or her skill level so that Moldtrax can assign each student an appropriate system on which to work. Moldtrax has a variety of systems from different manufacturers to challenge the apprentice and the veteran repair technician alike. Working in two-man teams, participants will completely disassemble, troubleshoot and correct electrical issues and then ultrasonically clean, reassemble and retest their molds. MoldTrax / 419-281-0790 / moldtrax.com Hot Runner System Diagnostic Tools Save Time and Boost Quality Synventive's SVG+ hot runner system features a simple design requiring no cooling lines or plates. The system saves time by providing monitoring and diagnostic tools from outside of the molding machine, resulting in less downtime, less scrap and increased reliability. The system upgrades easily to activeGate control technology for lower operating costs and improved quality. The system makes it possible to mold complex geometries and high- quality, Class A part surfaces in less time. The SVG+ hot runner systems are equipped with a new modular actuator design and patent pending SynCool3 technology. SynCool3 provides cooling of the actuators without the need for separate cooling lines. These systems are delivered with a Valve Monitoring Interface (VMI) for monitoring, diagnostics, and trouble shooting from out- side the molding machine. VMI provides measured individual pin movement data and allows operators to check whether the valve pins are moving as intended. Synventive / 978-750-8065 / Booth 225

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