Guill Tool & Engineering Co. Inc.

Extrusion Tooling Designer and Manufacturer

New Guill Tool Series 712 CircuitFlow Crosshead Solves Extrusion Problems for Wiring & more

West Warwick, RI – Guill Tool & Engineering introduces the Series 712 crosshead – the CircuitFlow™ – that solves problems electronics makers experience when extruding an ultra-thin wall over wiring and other micro-encapsulation tasks.


The electronics and medical industries have been plagued by problems with small wire that will “neck down” because of uneven flow of polymer through the head. This often causes the mini-wire to break.


“The Series 712 CircuitFlow crosshead is a proprietary tooling design that achieves 95% or better concentricity, holds precise tolerances, and reduces polymer usage, as well as achieves the thinnest walls possible – 0.0002 of an inch (0.000508cm). The Series 712 is also easy to operate and to clean,” summarizes Bill Conley, Guill’s sales manager.


The new Series 712 crosshead is a low volume design for 45 AWG to 10 AWG wiring sizes. With Guill’s proprietary Feather-Touch adjustment mode, the CircuitFlow effortlessly enables precise concentricity adjustment with self-contained cartridge style adjustment. The new design also includes the Seal Right system, which eliminates leaking.


The 712 Series has an adjustable center with proprietary precision engineering for specialized applications, including electronics, medical tubing, wire and cable, or other advanced micro-technology precision products. It is adaptable to a wide variety of extruders.


All Guill Tool 712 Series crossheads include a multi-port spiral flow splitter with optional Taperlock version that provides a reduced extrudate memory set, low material inventory, balanced material flow distribution and elimination of dead spots. In addition, the optional Seal Right system helps to eliminate leaking and ensures faster assembly and disassembly with less chance of damage to the system. This also contributes to less downtime and a faster turnaround for maintenance and cleaning.


Guill Tool also manufactures tips, dies, and breaker plates using state-of-the-art computerized CNC machining and EDM equipment.


Engineering services using the latest CAD systems are available for custom designing extrusion tooling products: crossheads, tips, clamps, flanges, air wipes, forming rolls, spiderless inline dies, dies, swing gates, breaker plates, special equipment and sizing dies.


Guill Tool received ISO certification in 1995. The first major extrusion tooling company to meet those international standards. The company has long been recognized as one of the leading established designers and manufacturers of custom extrusion tooling for types of applications including: wire, cable, fibre optics, medical tubing, wood composites, automotive tube, plastic compounding, custom applications, rubber, profile, industrial pipe, hose & tube, blow molding, food and packaging.


The company also encourages and provides education and training for the extrusion industry with plastic and aluminum model heads, fully illustrated operating manuals for step-by-step assembly and disassembly, training videotapes, as well as classes on the care and cleaning of extrusion tooling.

Founded in Rhode Island in 1962 by A. Roger Guillemette, the company was established as a job shop supplying tips, dies, crossheads and replacement parts to the wire and cable and plastic and rubber industries in New England and across the US, Canada and today throughout the world.


For a free evaluation, technical product sheets, general information, or for the name of a representative in your area, please contact Guill Tool & Engineering Co., Inc. 10 Pike Street, West Warwick, RI 02893 (USA), Tel: (401) 828-7600, Fax: (401) 823-5310 or email:

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