9/12/2017 | 1 MINUTE READ

Needle Valve System without Control Unit Meets Quality Requirements

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The electronics of the HRSflow’s Flexflow One needle valve system shut down at the point of maximum torque to prevent hot runner and mold damage.


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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 necessary 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 damage 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 additional control unit for operation. The company says that it provides high-quality part performance, reduces clamp force, has a wider process window, 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.


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