Plastic article or earthenware shaping or treating: apparatus – Including means advancing continuous length work through...
Patent
1989-04-26
1991-11-19
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Including means advancing continuous length work through...
425308, 4253822, 264178F, 264142, B29C 4778
Patent
active
050662104
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to an apparatus for cooling and granulating extrusions of thermoplastic material from extrusion dies comprising two substantially mirror symmetric output channels arranged back to back, whose upper ends are exposed to a cooling water supply and whose lower ends are directed to the entrance of a granulator with draw-in rollers and a cutting roller. The output channels project in the direction of the extrusions with respect to the connecting line of the extrusion dies and the entrance of the draw-in rollers between the dies and the draw-in roller entrance, and are exposed to spray nozzles for the purpose of cooling the extrusions.
Such an apparatus is known from the German patent 26 55 840. This apparatus is based on the object of providing particularly high capacity, for which the two substantially mirror symmetric channels arranged back to back are provided. Due to the arrangement of two channels, the capacity is doubled compared to having only one single channel, as is known from the German patent 25 03 455, where the doubling essentially results from doubling the number of extrusions. The configuration of each of the two output channels according to the German patent 26 55 840, which according to the disclosure in this patent are fixed with respect to one another, follows essentially the teaching of the German patent 25 03 455, according to which the extrusions are guided securely by the projection of the output channels between the dies and the draw-in rollers. The German patent 25 03 455 according to claim 6, also discloses the possibility of adjusting the amount of this projection.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a technically easily realizable adaptability of the apparatus to synthetic extrusions of the most different type and to achieve a particularly intensive cooling effect. In accordance with the invention this takes place in that the ends of the output channels directed to the extrusion dies and the draw-in rollers are each formed by a pair of guide plates, which are arranged above one another enclosing a free space and forming a channel. Each pair of guide plates can be laterally separated from one another so that when increasing the separation, the projection of the corresponding channel with respect to the connecting line increases hence increasing the tension of the extrusions to be granulated.
Due to the arrangement of two pairs of guide plates at a distance above one another, both variously large projections and also different inclinations of the guided extrusions with respect to the vertical can be provided, since the guidance of the extrusions in the upper and lower regions of the formed channels can be individually configured through the individually adjustable separation of the guide plates of each pair. By the provision of the intermediate free descent space between the two pairs of guide plates, the extrusions passing through this free space can be exposed on all sides to an intensive cooling, without the cooling in this region being hindered by the contact of the extrusions to a guide plate. The cooling liquid sprayed onto extrusions by spray nozzles in this region is therefore particularly effective here. It is expedient to mount the guide plates of each pair at their upper end on a common rotational axis whereby the ends opposed to the rotational axis can be separated from one another by an expansion device arranged between the guide plates of each pair. With such an arrangement, it is possible to widen the channels from one another formed by the two pairs of guide plates, simply by rotating the guide plates in each pair in the sense of a spreading or an expansion. Thus, mounting the guide plates involves simple constructive means.
It is expedient to provide a draw spring between the guide plates, which draws the plates of each pair together, so that they can be simply adjusted by pressure means acting from the inside. Any suitable pressure means, for example a cam or the like, can be
REFERENCES:
patent: 2324397 (1943-07-01), Hull
patent: 2800088 (1957-07-01), Leibundgut
patent: 2895165 (1959-07-01), Fry, Jr.
patent: 3400184 (1968-09-01), Matsuo et al.
patent: 4025252 (1977-05-01), Hunke
patent: 4192635 (1980-03-01), Hunke et al.
patent: 4269046 (1981-05-01), Strahm et al.
patent: 4528157 (1985-07-01), Lettner et al.
patent: 4530649 (1985-07-01), Philipp et al.
patent: 4756679 (1988-07-01), Stibal et al.
patent: 4913899 (1990-04-01), Hartig
Automatik Apparate-Maschinenbau GmbH
Brine Aubrey C.
Davis Robert B.
Meegan Owen J.
Woo Jay H.
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