Extruded hinge

Forming the hinge cross-section by using an extruder die results in a hinge with poor flex life. Because hinges are formed in the direction of the polymer flow, they cannot be sufficiently oriented when flexed. However, if an extruded hinge is formed by the take-off mechanism while the polypropylene... 

This conception, hingeing on the ability of alkylsulfonyl radicals to extrude sulfur dioxide, is delineated in Scheme 23. Thus, an ethylsulfonyl radical produced... 

Fig. 8.75b depicts an optional execution of the discharge end whereby two different, hinged discharge configurations can be attached alternatively to the extruder. 

The photographs in Fig. 8.81 show, as examples, two different executions of J.C. Steele s (see Section 14.1) Model 90AD extruder. Fig. 8.81a includes a horizontal mix-er/pug sealer and dual hinged dies while Fig. 8.81b shows a hydraulic die changer in which the die plates are not installed in the holders. Die changers are used to allow the exchange of plates with worn orifices with a minimum of downtime or to switch over from one cross section to another. Tab. 8.9 presents technical information on some... 

Fig. 8.81 Photographs of two high pressure axial screw extruders showing different die changers. (a) Extruder (model 90AD with horizontal mixer/pug sealer and dual hinged mouthpieces (= dies), (b) extruder (model 90AD with hydraulic horizontal die changer dies are not installed in the die holders (courtesy J.C. Steele, Statesville, NC, USA).

Fig. 6.3-21 Special extruder for the manufacture of catalysts or catalyst carriers. A hinged die holder allows the quick exchange of extrusion plates (courtesy Bormot, Uniontown, OH, USA)...

Hinged-type extruders. This type of special de-airing extruder developed for use in the advanced ceramic industry is fitted with an extrusion barrel which can be adjusted from a vertical to horizontal position (9CM) ), and is employed for the extrusion of non-plastic special bodies and oxide ceramics (Fig. 2). 

Fig. 2 Special design de-airing extruder with hinged extruder barrel...

Extruder barrel Version one part, enclosed, with or without intermediate barrel, swivel-type with hinges, with or without counter blades, number, coolable or heatable Material welded construction, cast iron, spheroidal graphite cast iron, cast steel, stainless steel design... 

Fig. 2 Piston extruder with hinged extrusion barrel, circa 1870...

Around 1870 extruder barrels, split in the vertical plane to be hinged sideways, were introduced and are still in common use today (Fig. 28). 

Head n. (1) In any extrusion operation, the delivery end of the extruder, usually fitted with a hinged gate that may contain a breaker plate and screen pack, to which the adapter and die are attached. (2) In blow molding, the entire apparatus by which the molten plastic is shaped into a tubular parison. This may include an adapter, a parison die, and a melt accumulator. 

There are three techniques used to fabricate integral hinges molded-in (by injection or blow molding), cold worked, extruded, and coining. 

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