摘要:
The invention relates to a method for relaxing stress in glass, especially at the base of the neck of a television funnel, comprising at least the following steps: the glass which is to be relaxed is heated from an initial temperature T1 to a holding temperature T2; said glass is maintained at the holding temperature T2 for a period of time t2 until the glass has relaxed; the glass is cooled to a temperature T3 which is always less than T1; the temperature T2 is maintained, and the heating and cooling processes are carried out by means of a regulating circuit comprising at least one temperature sensor for detecting the temperature and one heating unit as a control element. The invention is characterised in that the heating unit comprises infrared beam emitters for heating the glass which is to be relaxed, said beams having a thermal delay time of less than 10 s, especially less than 5 s.
摘要:
This invention is characterized by the construction of a furnace, divided into three broadly differentiated phases and zones; and with independence of the means of conveyance assigned to each one, in seven different stages, two of heating in the first phase, one of rapid cooling in the second phase and two others of after cooling in the third; apart from two more, whether outside the furnace or combining an additional module, until reaching ambient temperature; with a total process time of between two hours and a half and four and a half hours, as well as with different temperatures, and whose upper limit doesn't exceed 880°C.
摘要:
A heat treatment oven (1) defines a plurality of inner chambers or zones for receiving Cathode Ray Tubes stacked in two rows and vertically orientated with front faces of tubes facing one another. The oven includes heating means in the form of gas burner or electric element (3) for heating fluid medium, in this case air. The air is circulated around the Cathode Ray Tubes by means of an impeller (5). The oven includes first and second control means for varying the temperature of the fluid medium and the velocity of the fluid medium introduced.
摘要:
A furnace through which articles may be continuously or intermittently passed from an inlet end to a discharge end, the furnace having at least one zone provided with air recirculation and divided into a plurality of sub-zones each provided with separate means for circulating air within that sub-zone transversely of the direction of movement of articles therethrough and each sub-zone incorporating at least one flow control device movable to permit air from that sub-zone to pass to an adjoining sub-zone.
摘要:
The invention relates to a transportation system for annealing a glass container having a barrel and two extremities, said transportation system including a lath provided with at least two non-metallic inserts, the at least two non-metallic inserts being positioned such that, when a glass container is seated on said transportation system, said glass container is exclusively held by contact between said at least two non-metallic inserts and said barrel in substantially horizontal position which is fixed relative to the lath. The transportation system further includes securing means configured to reversibly firmly secure a clipping portion of said at least two non-metallic inserts into a respective slot of the lath.
摘要:
The invention relates to an installation for the continuous measurement of the surface temperature of a glass ribbon (G) in a flat glass lehr. Said installation comprises two sub-sets (D1, D2) which are respectively arranged either side of the glass ribbon (G), each sub-set (D1, D2) being flush with the surface of the glass ribbon, and an isothermal space being created around each each device for measuring the temperature (TC, TC2) of the ribbon by means of a thermal and optical insulator (3, 4).
摘要:
A furnace for the continuous heat treatment of glass containers, comprising a structure (12) provided with a conveyor (13) which is designed to receive containers (31, 131, 231) and which is made to advance through a hot zone (14) and a ventilated zone (15), said conveyor (13) comprising a pair of chains (17) which are located on opposite sides of the structure (12) and which are wound in an endless loop onto toothed end pulleys (18) so as to define an upper conveying section and a lower return section, links in each of the chains (17) having a plurality of brackets (21) which are arranged in a projecting manner and are directed inwards towards the opposite parallel and adjacent chain (17), said brackets having, mounted on them, cross-pieces (22) provided with a plurality of supports (28) on which at least a portion of the containers may rest.
摘要:
Beschrieben werden ein Verfahren und eine Vorrichtung zur Erhöhung der Festigkeit von Glaskörpern, die erwärmt und danach abgekühlt werden. Die Vorrichtung hat ein durch einen länglichen Brennofen (14) beführtes Transportband (15), wenigstens drei hintereinander angeordnete Heizzonen (1-6) und anschließend hintereinander angeordnete Kühlzonen (7-12) mit Einrichtungen (22, 24) für die Zufuhr von Heißluft und/oder Kühlluft und mit Abluftanschlüssen (23, 24). Zur Erhöhung der mechanischen und thermischen Festigkeit der Glaskörper unter Einsparung von Energie, Raum und Zeit wird für das Verfahren erfindungsgemäß vorgesehen, daß der jeweilige Glaskörper mit aufgebrachtem Dekor intermittierend in wenigstens drei Stufen (1-3) erwärmt und danach in einer Stufe (7) um eine Temperaturdifferenz zwischen 420°C bis 480°C abgekühlt wird. Hinsichtlich der Vorrichtung wird vorgesehen, daß zwischen der letzten Heizzone (6) und der ersten Kühlzone (7) eine Thermoschleuse (20) eingebaut ist, die eine wärmedämmende, bewegbar angetriebene Klappe und wenigstens eine Kühlluftzufuhrleitung (22) aufweist, wobei das Transportband (15) intermittierend angetrieben ist.
摘要:
Arche de recuisson comprenant plusieurs sections juxtaposées (2-1,2-2...) dont une section d'entrée (2-1) agencée pour recevoir des objets à recuire, en particulier des objets en verre, qui ont emmagasinés une quantité de chaleur. Ledit arche est pourvu de premiers moyens agencés pour prélever à l'intérieur d'une section d'entrée (2-1) de l'air chauffé à l'aide de ladite quantité de chaleur et l'amener, par une circulation forcée, vers au moins une autre section (2-2), une cloison d'entrée étant formée par des deuxièmes moyens agencés pour produire un courant d'air (15) circulant de haut en bas.