R&D's hot-runner tip benefits preforms R&D Tool and Engineering Inc. has introduced a new hot-runner tip design for its line of molds that are used for one-step injection stretch blow molding of PET bottles.
The company in Lee's Summit, Mo., said its "short gate technology" produces preforms with shorter, cleaner gate vestiges. That means the bottles have no secondary gate clipping operations and fewer rejects.
The design uses a thermal break tip, as opposed to valve gate tip. R&D Tool says this eliminates the need for a shut-off pin, meaning less maintenance.
Because of the short gate heights, preforms coming off the mold are ready for the blow molding stage without any secondary operations.
Another benefit: The volume of the gates is easy to compress during the blowing cycle, which leads to a more-uniform distribution of material along the container. Previous designs could become cold, fold over and pull material to one side, the company said.
"Aesthetics are the name of the game" in PET bottles, said Al Roland, director of new business development.
R&D received a patent on the tip design in November 1999. An insert extending beyond the manifold nozzle-cap sealing surface, into an injection mold cavity cutout, forms an outlet space from the passage inlet with a predetermined gap. The cutout receives plastic material from the nozzle.
Tel. (816) 525-0353.
Motivair's chillers save on energy costs
Motivair Corp. of Amherst, N.Y., has developed new chillers, both portable models and central full-plant chillers. All models are available with air or water cooling.
The portable chillers range in capacity from one-half ton to 50 tons. A special integral reservoir holds the evaporator to allow the compressor to cycle on and off up to eight times an hour while maintaining the water temperature within plus or minus 3.5°F.
Motivair said the chillers only consume the amount of electric power needed to handle the cooling load, so they save energy costs.
Central chillers range from 50-200 tons. They feature multiple independent refrigeration circuits with separate tank and pump stations. Scroll compressors are available as an option on all models.
Tel. (716) 689-0222, fax (716) 689-0073, e-mail [email protected] corp.com.
New Novatec dryers prevent overdrying
Baltimore-based Novatec Inc. says its Moisture Manager dryers control the dew point, to avoid overdrying.
The company said some polyamides, such as nylon 6 and nylon 6/6 and some polyesters can be overdried for certain types of parts.
The new dryers monitor the dew point and material dryness, and signal a change in process air flow according to dew point.
The equipment can be used in central drying systems, to deliver air to remote heater/blowers equipped with Moisture Managers, each with an individually set drying temperature and dew-point control.
Tel. (410) 789-4811, fax (410) 789-4638.
Ciba's Ren line aids rapid tool building
Ciba Specialty Chemicals Corp. developed a new line of products for mold makers to build rapid tools.
The Ren Professional Tooling line includes epoxy resins that don't crystallize to extend product shelf life to two years. A new laminating paste and low-density backfill allow production of accurate molds that can be demolded after 18 hours. New surface coats, laminating systems, casting systems and a silicone release agent also are part of the new Ren product line, the East Lansing, Mich., firm announced.
Tel. (800) 955-5509 or (517) 351-6255, fax (517) 351-6255, e-mail [email protected]
Material Sciences adds polymer process
Material Sciences Corp. said it is commercially introducing its Solid State Shear Pulverization technology to create new polymer materials.
The technology is a continuous process that subjects polymers to very high shear and pressure, causing physical and chemical changes without melting. The Elk Grove Village, Ill., firm claims its process can create reactive sites on polymer chains, blend polymers that are normally incompatible, and broaden molecular weight distribution for better film production.
The company will feature its technology at Antec 2000, NPE 2000 and other events.
Tel. (847) 718-8133, fax (847) 439-0737, e-mail [email protected] .com.
Chroma products aid in mixer cleanings
Chroma Corp. of McHenry, Ill., introduced a cleaning product for rotational molders.
Chroma-Clean is a recyclable, reusable blend of powders and pellets that cuts downtime during the cleaning of high- and low-intensity mixers when organic and inorganic color changes are made between batches.
Tel. (877) 385-8777 or (815) 385-8100, fax (800) 385-5580 or (815) 363-2648, e-mail [email protected] chromacolors.com.
Conics & Materials offers manual press
Sonics & Materials Inc. is offering a hand-operated ultrasonic welder designed for small-volume production.
The press is used with Sonics' 500-watt, hand-held ultrasonic welder. It also can be adapted for use with higher powered welders (1,000 and 1,500 watt).
Sonics & Materials is based in Newtown, Conn.
Tel. (203) 270-4600, fax (203) 270-4610, e-mail [email protected] icsandmaterials.com.
Moldflow software works with Windows
Moldflow Corp. said the new version of its Moldflow Plastics Xpert runs on Windows NT and has an easy-to-use touch-screen interface.
Moldflow announced the MPX version 2.0 in February. The company originally introduced MPX at the K'98 show in Germany.
MPX software can set up an injection molding machine and establish processing parameters.
"Companies can now use plastics simulation information conducted during the early design phase to optimize the injection molding machine to produce perfect parts," said Peter Rucinski, MPX product manager.
Moldflow, of Lexington, Mass., claims MPX can reduce setup time by up 80 percent and cut scrap rates by 50-60 percent.
Tel. (781) 674-0085, fax (781) 674-0267.
Alusuisse composites presents vinyl board
Alusuisse Composites Inc. has introduced lightweight vinyl board to markets in North and South America.
The Benton, Ky., firm said its Sintra Top Material is aimed at signage, displays and other applications that can gain from a high-gloss effect. The material is a rigid, foamed vinyl with a glossy finish on top and bottom surfaces.
Sintra Top allows downgauging and cost savings compared to nontransparent acrylic, Aluisuisse claims. It can be formed by sawing, drilling, heat bending and thermoforming. The product is made by an affiliated company in Europe where it was introduced about a year ago under the Forex Top Material name.
Tel. (800) 626-3365 or (270) 527-4200, fax (270) 527-1552.
Westedge develops small acrylic hinge
Westedge Inc. developed an acrylic hinge it claims is the smallest on the market.
Acryl-Hinge Small is 1.4 by 1.5 inches and easy to attach by solvent cementing. The San Rafael, Calif., company said the product is designed as an economical hinge for display cases, dispensers and medical apparatus. It is made of extra-tough acrylic for use on acrylic sheet with thickness of 0.12, 0.18 or 0.25 inches. Westedge said it has a self-lubricating pin to extend wear and for quiet operation.
Tel. (415) 492-0272, fax (415) 492-0274, e-mail [email protected] .com.