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Rewriting valve gate rules, doubling productionRewriting valve gate rules, doubling production

Mold Hotrunner Solutions (MHS) introduces Rheo-Pro iVG, an innovation the company claims is the world’s most compact back-to-back valve gate hot runner system. The new iVG is the first and only internal valve gate on the market, claims MHS. Its patented design completely “rewrites the rules” of valve gating technology and opens up endless new possibilities for high-cavity stack molds, swivel molds, and multi-material injection molds.

PlasticsToday Staff

August 25, 2010

1 Min Read
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The compact design of Rheo-Pro iVG’s nozzles means it is now possible to build “short stacks,” or stack molds with a tip-to-tip length of only 285 mm and a pitch, or gate-to-gate distance, of 63.5 mm. For molders, this means the ability to produce more plastic parts in smaller machines with less clamp tonnage, resulting in better operating costs, significantly higher production outputs, and most important, greater profitability.

For example, at 3.0 seconds cycle time, a 64 x 64 stack mold for 26-mm lightweight bottle caps can produce 3.5 million caps per day in a 790 x 630-mm stack mold.  The melt channels are reduced in size, length, and volume to enhance color change and pressure drop for higher viscosity materials. The new iVG back-to-back valve gate nozzle increases mold uptime and improves conventional manifold systems. The valve-to-valve melt transfer through the mold parting surface eliminates the traditional sprue bar.

The Rheo-Pro iVG is completely front-serviceable from the mold parting line. Every component, including nozzles, valve gate actuators, and valve pins, can be accessed quickly by simply stripping the cavity plate onto the core side while the entire mold remains inside the machine. Preventive maintenance is effectively reduced to minutes, the company claims.

The iVG does not require any seals, hoses, tubes, belts, or motors, making it the most durable and maintenance-friendly valve gate system ever built, according to MHS. —[email protected]

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