Drive for show, putt for dough

Pushed from selling the product to manufacturing it, David 
McCormack now injection molds and markets a highly popular line of discs for the expanding ranks of disc-golf enthusiasts, utilizing compounds from RTP for a line of “putters,” whose unique feel is creating devoted users.

How devoted? Browsing through user comments at Disc Golf Review, feedback on Gateway Disc Sports ’ (St. Louis, MO) Sure Grip line includes, “[Gateway’s disc] has definitely taken a permanent spot in my bag,” “awesome,” “one of the greatest discs available,” and “one of the most versatile and reliable approach discs on the market.”

As in traditional golf, disc golf requires players to “putt out,”—in this case throwing specially designed putter discs toward the “hole,” which consists of a pole and chain netting.

From 1984-1998, McCormack actually sold discs for a current competitor before changes at the company forced his hand and had him machine shopping. “Long story short, one of my competitors, who I sold discs for, was splitting up their company and allowed one of the entities to take about 12 accounts from me, and would not give them back,” McCormack says. “As an idle threat I said, ‘I’ll just make my own discs then.’”

The company McCormack founded has been doing just that for about 10 years now, molding the discs in-house on two 170-ton Toshibas. McCormack says Gateway has molded about 80,000 through the first nine months of 2009, with 100,000 to be produced by the end of the year, if its thermoplastic polyurethane (TPU) and TPU blends are counted. Cycle time is approximately 40-45 seconds, with logos applied via hot stamping, although the company is working on incorporating inmold decoration.

Not your typical Frisbee
Disc golf, like its club and ball inspiration, features different discs for different shots, typically based on distance, including drivers, midrange, and putt and approach discs. The discs used bear little resemblance to giveaway Frisbees, with Gateway utilizing a mix of filled and unfilled TPUs, polyproyplene (PP), and thermoplastic vulcanizate (TPV) for products with a smaller diameter, greater thickness, and different tactile feel.

When the company looked to upgrade its Sure Grip line of putt and approach discs (the “hole” in disc golf is a metal pole with a chain net), it turned to custom compounder RTP Co . (Winona, MN) seeking a material that could accept mineral additives to reach a density of 2.0. At that mass, McCormack felt Gateway would be able to maintain the discs’ flexibility and allow them to be used in a variety of playing conditions. The company worked with other suppliers, only achieving a density of 1.6, before it reached 2.0 with RTP, applying its 2800 B Series high-gravity TPV. “We have used many other material suppliers. RTP is the best,” McCormack states plainly.

Gateway Disc Sports’ line of Sure Grip putter and approach discs for disc golf utilize a TPV compound from RTP that allows them to be highly filled for greater density.

McCormack says the method of mixing each batch to get the right flex and weight is a “cross between

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