Vacuum-calibrating device with a liquid blocking device in...

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 47/90 (2006.01) B29C 47/88 (2006.01)

Patent

CA 2439538

The invention relates to a cooled calibrating device for a plastic extrusion facility, comprising a housing (5) receiving a cooling liquid (2) and calibrating guides (6) through which a plastic profile (1) is passed, in addition to inlet and outlet holes (10, 23) having attached lines for the cooling liquid, wherein an area (21) free of liquid and filled with air remains above the level of the cooling liquid. An outlet hole (10) for the cooling liquid is arranged at the height of the cooling liquid level (20) in the calibrating device so that the cooling liquid can flow out without an additional pump. An outlet line (11) attached to the outlet hole extends vertically and ends in a cooling liquid reservoir (12) that is subjected to an external atmosphere, wherein a compact liquid column (24) is formed in the outlet line (11).

La présente invention concerne un dispositif de calibrage pour une installation d'extrusion de matière plastique, comprenant un boîtier (5), qui accueille un liquide de refroidissement (2), des guides de calibrage (6), à travers lesquels passe un profilé en matière plastique (1), ainsi que des ouvertures d'admission et d'évacuation (10, 23), auxquelles sont raccordées des conduites destinées au liquide de refroidissement. Il reste une zone (21) remplie d'air et dépourvue de liquide, au-dessus du niveau du liquide de refroidissement. Une ouverture d'évacuation (10) destinée au liquide de refroidissement se trouve à la hauteur du niveau (20) du liquide de refroidissement dans le dispositif de calibrage, de façon que le liquide de refroidissement puisse être évacué sans pompe supplémentaire. Une conduite d'évacuation (11) raccordée à l'ouverture d'évacuation s'étend de manière verticale et débouche dans un réservoir de liquide de refroidissement (12) qui est exposé à l'atmosphère extérieure, une colonne de liquide compacte (24) se formant dans ladite conduite d'évacuation (11).

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