Extruder machine body

Extruder housing Version extruder machine body and gearbox separate, or as unit Design open ribbed-type construction, enclosed double-walled box section, self-contained design, fitted on base frame Material welded construction, cast iron, spheroidal graphite cast iron, cast steel... 

Going back to the first auger extruders, the extruder machine body was separate from the open-type gearbox and drive section until, from 1865... 

Fig. 35 Auger extruder separate machine body and drive section...

Plastic tube and tubular films are formed continuously by extruding a polymer through an annular die. The annular flow channel is formed by the outer die body and the die mandrel. A number of annular die designs are currently employed. In the first, the mandrel is supported mechanically onto the outer die body by a number of fins called spider legs Fig. 12.41 illustrates this type of die. The flow is axisymmetric, and the only serious problem encountered in the cross-machine direction uniformity of the extruded product is that of weld lines and streaks caused by the presence of the spider legs, which split the flow. 

Injection The injection blow moulding machine is based on an extruder barrel and screw assembly which melts the polymer. The molten polymer is fed into a manifold where it is injected through nozzles into a hollow, heated preform mould. The preform mould forms the external shape and is clamped around a mandrel (the core rod) which forms the internal shape of the preform. The preform consists of a fully formed bottle/jar neck with a thick tube of polymer attached, which will form the body. 

Two-piece aluminum containers are also available. These consist of impact-extruded upper shells having a seamed-on aluminum bottom. The valve opening is machined from the solid aluminum rather than rolled. All coatings must be applied to the can body after the forming operation. 

In food extrusion, an elongated body synonymous with uncut EXTRUDATE. See also STRAND. In SPHERONIZA-TION, referring to the rotating PARTICULATE material. TABLETTING MACHINE in which COMPACTING TOOL SETS are arranged on a rotating table (= TURRET). 

Extruder and de-airing single shaft mixer. This machine combination is the superior choice for stiff extrusion purposes in the heavy clay industry. One of the reasons for this is the fact that a stiff body could cause warping of the mixer shaft, which could prove to be problematic with a double shaft mixer. 

Extruders are predominantly employed in ceramics for direct shaping, but they are also used for the pre-shaping of clots and slabs ready for a further shaping process and, lastly, particularly in the field of fine ceramics, as pure preparation machines for homogenising, de-airing and for improvement of the plasticity and density of bodies. 

The Universal Patent Brickmaking Machine, a suspended auger extruder designed by Carl Schlickeysen (auger for plastic bodies)... 

Flow laminations, laminations caused by inner gliding surfaces, and cutting laminations, all can be distinguished to varying degrees in the extrusion of plastic bodies, independent of the extrusion method employed, e.g. piston extrusion presses, single-shaft extruders, twin-shaft extrusion machines or rotory-type extruders. 

In the field of technical ceramics, these requirements are usually satisfied. Extrusion is practiced with well-prepared, homogeneous compounds conducive to constant, uniform production. On the other hand, extrusion involves very high pressures, often in excess of 200 bar, and, frequently, body that is difficult to extrude. This calls for extrusion tools - inch everything from the extruder itself to the die exit - of hydraulically optimized design. Moreover, the extrudates and honeycomb elements for technical applications must display high levels of exactitude. For example, the engineering of a honeycomb die for thin-walled honeycombs, i.e., ceramic monoliths, with web thicknesses of 0.15 mm and less demands a degree of precision that can only be achieved with state-of-the-art machine tools. 

Plate die n. An inexpensive and easily modified die for extruding a plastic profile, into which a orifice of the desired shape has been machined typically by electrical-discharge machining. The plate is bolted to the front of a universal die body. 

Auger. (1) An extruder for clay, or clay body, the column being forced through the die by rotation of a continuous screw on a central shaft. (2) A large corkscrew operated by hand or by machine to take samples of soft material, e.g. clay, during prospecting. 

Domestic appliances Dishwasher parts such as top frame, basement, tubs, extruded gaskets, water duct, water softener compartment, etc. Washing machine parts such as detergent dispenser, door frames, inlet and outlet pipes, bellows, feet and wheel, housings and ducts, etc. Refrigerator parts such as boxes, containers, drawers, ducts, inlet and outlet pipes etc. Microwave oven cabinet, irons and coffee maker body parts... 

M90-07 Celcon color Concentrates are provided in a wide range of standard colors for letdown into natural Celcon via extrusion or screw injection molding machines. To obtain body colored injection molded or extruded products at cost savings. 

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