Hybrid Press Runs Larger Tools at Lower Tonnages

Nissei is positioning its new FWX Series of hybrid injection molding machines as offering molders the potential for unprecedented space-saving and press-downsizing opportunities. Available in a tonnage range from 309 to 1,439 tons, with a 309-ton FWX760Ⅲ-130B version in Orlando, the FWX line was developed under the concept of “2-Class Larger Mold, 2-Class Smaller Machine.” Under this, if a hypothetical machine range’s normal array of clamp force tonnages with four sizes — A, B, C and D, where “A” being the largest and “D” the smallest — is considered, a tool that a molder would expect to require an “A” size press for could potentially use a “C,” if they also apply Nissei’s N-Sapli low-pressure technology.

In terms of potential footprint reduction, as a Nissei spokesperson explained to Plastics Technology, when comparing a FWX760III machine with other machines that have the same or similar tie bar clearances, if, based on clamping force, a one class smaller machine can be used for an existing mold, it would occupy roughly 15% less space. If two-class downsizing is possible, which depends on the mold and process, about 30% space saving is possible. “The FWX redefines the way of choosing a machine,” Nissei stated in a release, saying selection could be based on mold dimensions rather than tonnage.

The FWX Series is equipped with what Nissei describes as a new compound-type clamping unit, which enables significant downsizing. Nissei says this clamping unit design consists of a high-speed cylinder, high-pressure clamping cylinder and half-nut mechanism, which replace a conventional cylinder that controls both high-speed clamping and high-pressure clamping with a single clamping cylinder.

At the show, a 309-ton FWX760Ⅲ-130B will mold PP texture plates from a 2-cavity mold, utilizing roughly 220 tons of clamp force, thanks to N-Sapli, where processing would normally require 661 tons. Injection pressure will be 17,405 psi, according to Nissei.

Nissei says the FWX Series of hybrid injection molding machines gives molders the opportunity for saving space and downsizing mold tonnage requirements. Source: Nissei

New Vertical Press

In addition, Nissei will feature a new tonnage vertical hybrid press — a 331-ton TWX300RⅢ36V — which also utilizes the compound, direct-pressure clamp. The TWX’s clamping mechanism emables a lower mold-mounting height of 40 inches, as well as an overall lower machine height, for improved worker ergonomics. The machines can also operate in facilities with lower ceilings.

At the show, the machine will mold a water tank and its lid from a family mold, with warpage eliminated by applying low-pressure molding. The display shows how this machine enables molding of products with different shapes and shot volumes using the same process conditions.

In support of the Japanese government’s “Plastic Smart” campaign promoting a “smarter relationship” with plastics, Nissei will also mold a cutlery set using a proprietary blend of eco-friendly PLA material with wood flour and waste plastic reutilization.