Extruders designed for making PP-R pipe
Cincinnati Extrusion GmbH has developed a production line to make PP-R pipe, using two outer layers of random copolymer polypropylene and a middle layer of glass-filled PP homopolymer.
The pipes are an alternative to conventional heating and sanitary pipes for hot and cold water in buildings, according to the company in Vienna. The main advantage, an increase in stability, is achieved with the glass-fiber reinforcement.
In contrast to conventional pipes, the PP-R pipes' glass-fiber content reduces their lengthwise expansion, especially when hot water is being transported, and lessens their deflection.
To make the PP-R pipes, Cincinnati Extrusion recommends a combination of two Talos single-screw extruders. The extruder for the inner and outer layers is equipped with a 30-D processing unit and a grooved-feed section. The extruder for the middle layer has a length of only 25-D and a smooth processing unit sporting anti-wear protection for running PP with glass-fiber content.
The two extruders are synchronized by a microprocessor control system. The system uses an Iris 25-3 coex triple-spiral mandrel die, which can be easily adapted to different layer thickness distributions.
One special feature is the downstream equipment for pipes up to 60 millimeters in diameter. Pipes up to 32mm are normally cooled in a full bath; spray cooling is recommended for larger diameters. To cover both categories with a single downstream unit, Cincinnati Extrusion has designed a variable water-cooling bath, which switches back and forth between both cooling techniques.
The system also includes a caterpillar haul-off, cutting saw and tilting table.
In other news, Cincinnati Extrusion has sold more than 700 Alpha single-screw extruders since introducing the machine at K2001. Now the company has added to the range. The Alpha 75-25B is designed for technical profiles as well as small-diameter and corrugated pipes, with a screw diameter of 75mm, a smooth feed bushing and a processing length of 25-D. Standard equipment includes a relay control cabinet and a mobile, digital operator terminal.
Customers can choose a screw geometry for high density polyethylene, polypropylene, ABS, polystyrene and PET, and one for modified hard PVC granulate and hard PVC with filler content, and one for soft PVC granulate and thermoplastic elastomer blends.
The company's U.S. unit, Cincinnati Extrusion Inc., is based in McPherson, Kan.
Tel. 859-746-1530, fax 859-371-4534, e-mail [email protected]
Guill Tool offers dies for pipe, blow molds
Guill Tool & Engineering Co. Inc. of West Warwick, R.I., has introduced extrusion dies for large-wall polyethylene pipe and extrusion blow molding.
Model 2030 is designed to extrude pipe for the marine, cable, electronics, water and oil, and natural gas industries.
Pipe makers have experienced polymer variations, Guill said. Inconsistent material flow and distribution slows down production, resulting in a critical loss of time, material and money.
Model 2030 solves those problems, according to Guill, because of a patent-pending combined die and reservoir system. Material from the die is delivered with the balance necessary for accuracy. Coextrusion capability enables the simultaneous extrusion of multiple materials or multiple stripes.
On the blow molding side, Guill said its Model 1025 yields 81/2-10 inches of core diameter, available in designs including single- and multilayer, multiple stripes, coextrusion, triple extrusion, spiral and split flow. The dies are designed to handle a range of exotic materials including bioplastics, composites and advanced polymer blends.
Tel. 401-828-7600, fax 401-823-5310, e-mail [email protected]
Shredder processes large-diameter pipe
Economizer USA has introduced a heavy-duty, single-shaft pipe shredder called the EPS that is available in 39- and 56-inch rotor dimensions. The unit has rotary cutters operating at low speed for smooth size reduction.
The EPS was developed to reduce the size of pipes up to 47 inches in diameter with no need to pre-cut items up to 25 feet long.
When combined with a granulator, the shredder can reduce material to about 1-4 inches. Output material sizes range from one-eighth inch to one-half inch. A low-speed rotor transmits high cutting torque for shredding solid, thick-wall or corrugated pipe.
Economizer of South Attleboro, Mass., is an operation of Schaumburg, Ill.-based ACS Group.
Tel. 508-399-3018, fax 508-399-3150.
Pelletizer producer introduces Black Ice
Reduction Engineering Scheer Inc., which makes pelletizers and pulverizers in Kent, Ohio, has joined with Air Products and Chemicals Inc. of Allentown, Pa., to introduce its first cryogenic impact mill, called Black Ice.
The mill does ultrafine reduction of a range of materials. Air cylinders open the mill for maintenance, cleaning and changeovers.
The unit boasts variable-speed adjustment and a reverse-rotation option that provides bi-directional operation.
Tel. 330-677-2225, e-mail jmauri @reductionengineering.com.
Multibeam pullers handle range of pipe
Conair Group Inc. introduced a family of pullers that has up to eight cleated, non-marking belt assemblies. The largest unit, Model CP36896, can handle 40-inch-diameter plastic pipe.
Each belt assembly has its own motor mounted to a speed reducer on the belt assembly. All the motors run at the same speed to reduce noise and cleat wear.
The upper-beam assemblies open and close pneumatically. The lower assemblies are adjusted mechanically for better alignment with the extruded pipe.
There are five models. The smallest has three beams and handles pipe or tubing from 1 inch to 6.5 inches in diameter.
Conair is in Cranberry Township, Pa., a Pittsburgh suburb.
Tel. 724-584-5500, e-mail ssickles @conairgroup.com.
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