Plastics News correspondent Bill Henson reported these new-product items from the Association of Rotational Molders' Rotoplas '97 international exhibition, held Oct. 6 in Westmont, Ill., in conjunction with ARM's Oct. 5-8 fall meeting in Oak Brook, Ill.
Wheeler Boyce adds new mold technology
Wheeler Boyce Co. in Stow, Ohio, says it now can create rotational molds through laminated object manufacturing.
The process allows the firm to build patterns and scaled-down versions of products directly from a three-dimensional electronic file.
Wheeler Boyce also is adding two computer numerically controlled machines for fabricating aluminum molds.
Tel. (330) 686-1292, fax (330) 686-1582.
Ariz. firm upgrades Mold On Graphics
Mold In Graphic Systems in Clarkdale, Ariz., unveiled its second-generation Mold On Graphics. The graphics are fused into the plastic after the part has been molded by using heat generated from hand-held heat guns or specialized heat tunnels.
The company claims that by encapsulating the graphic inside the plastic, the image is impervious to cleaning solvents and caustic chemicals, saltwater, rain, ice or hot-stream pressure washing.
Tel. (520) 634-8838, fax (520) 634-9036.
CMT system heats through mold ducts
Andrew Wytkin of Perth, Australia, has designed a new rotomolding system called Composite Mold Technology that changes the way parts are molded.
CMT provides direct electrical input and cooling through ducts built into the mold, Wytkin said. The system eliminates the ovens commonly used in rotomolding.
``The heating system is directly under the mold face. There are no heating ovens, arms or waste out of the flue of heat, as the heat zoned for the molding process is retained in the mold,'' he said.
The mold is controlled by a personal computer with CMT software developed specifically for the mold and the CMT machine, according to Wytkin. The technology incorporates independent controls for each cavity or zone of a mold, allowing concentration of heat levels in specific areas to form consistent wall thicknesses over deep cores.
The North American distributor for CMT is Chroma Corp. in McHenry, Ill.
Contact Chroma at tel. (815) 385-8100, fax (815) 385-1518.
Ferry router features single or twin tables
Ferry Industries Inc. introduced a five-axis computer numerically controlled router, available either in single or twin tables.
Each table measures 60 inches by 60 inches; the twin tables can be operated independently or as one 120-inch-by-60-inch surface.
The machine's standard spindle is a single, 7.5-horsepower unit with programmable speed of 2,000-25,000 revolutions a minute.
The Stow, Ohio, company also exhibited its RotoCure 2.0 System Manager. The rotational molding control system can be linked with an office computer for remote access to production data. It comes equipped with a 486 AT computer and a full-color, 14-inch SVGA monitor and multifunction keypad. Ferry offers an optional bar code printer to work in conjunction with the RotoCure 2.0 for printing labels.
Tel. (330) 688-4400, fax (330) 686-0507.
Teknor anti-static used with LLDPE
Teknor Color Co. of Pawtucket, R.I., introduced an anti-static additive for rotational molding of linear low density polyethylene.
The white powder, sold under the trade name Stat-X 2, can be mixed with resin by the molder, along with dry color, or can be premixed by Teknor.
Stat-X 2 eliminates swirling, streaking and other inconsistencies in part coloration caused by static charge, the firm said. It typically is used at loadings of 40-60 grams per 45 kilograms of resins.
Tel. (401) 725-8000, fax (401) 724-8520.
Millennium unveils HDPE, LLDPE resins
Millennium Petrochemicals Inc. of Cincinnati has introduced two hexene-based high density polyethylene rotomolding resins with high impact strength and environmental stress crack resistance.
Petrothene GA 655-662 and GA 658-662, contain ultraviolet-light and antioxidant additive packages. GA 655-662 has a 5.0 gram/10 minute melt index; GA 658-662 has a melt index of 8.0 g/10 minutes. Both resins are available as powders and meet Food and Drug Administration requirements for food-contact applications.
Millennium also showed a flame-retardant linear low density PE for rotomolding called Spectratech MPR 12247. The 35-mesh powder has a density of 1.09 and a melt index of 6.5 g/10 minutes.
Tel. (513) 530-4128, fax (513) 530-4403.
Dow aims polyolefins at rotomolding sector
Midland, Mich.-based Dow Plastics is offering two new resins, DSQ 1504, a developmental polyolefin plastomer for rotomolding, and XUS 59900.29L, an enhanced polyethylene resin targeted at European toy manufacturers.
DSQ 1504 has a 3.5 melt index and is intended for applications requiring excellent stiffness and impact strength, according to Dow. It complies with Food and Drug Administration regulations for food-contact applications. The XUS 59900.29L resin has a melt index of 15.
Tel. (517) 636-0521, fax (517) 636-8201.
AVK makes fastener for rotomolded parts
AVK Industrial Products in Valencia, Calif., showed its new AR series fastener, a blind-installed internally threaded fastener it claims is ideal for assembling rotomolded plastic products.
The fastener features a preset bulb, much like a cartridge base, and slotted body design. It is installed with a torque tool and the slotted body separates into segments that fold and grip the backside of material to which it is fastened.
Tel. (805) 257-2329, fax (805) 257-8043.