摘要:
A vertical calender arrangement comprises a controllable-deflection top roll, a controllable-deflection bottom roll and intermediate rolls arranged between top and bottom rolls. The top roll and the bottom roll are each provided with a power drive.
摘要:
A device for removing moisture from a continuously advancing textile web by suction. A suction slit which reaches crosswise across the textile web is provided, which is delimited on one side by a slide surface, on the other side by a roll. On the side facing the roll, the slide crosspiece has a concave recess, into which the roll partly fits. At its edge, facing the roll, the slide crosspiece forms a tongue-like projection, which extends over the top of the roll, almost to the vertex of the roll.
摘要:
Carpet material with at least a proportion of uncleaned used carpets is shredded to form a fiber-like wooly mass. The carpet material contains a thermoplastic binder with a low melting point, for example polypropylene, which can be derived from the used carpets or be added. Furthermore, a duroplastically hardening binder, for example phenolic resin, is added to the carpet material. The carpet material is compressed to form the molded part or panel with these two binders, at a temperature which lies above the plasticizing point of the thermoplastic binder, but below the plasticizing point of any other thermoplastic components of the carpet material.
摘要:
A hydraulically supported roll includes a stationary crosshead extending through a rotatable hollow roll, which is heated at its inner and outer circumferences. A thermostatic control and regulating device is provided to keep the temperatures at the inner circumference and the outer circumference of the hollow roll at the same level during the heatin-up and/or cooling-down phase.
摘要:
A hydrostatically supported roll includes a stationary crosshead, which extends through a rotatable hollow cylinder to form a surrounding clearance space therewith. Annular sealing elements are radially movable in bores provided in the crosshead to sealingly abut the inner circumference of the hollow cylinder. The sealing elements are arranged in diametrically opposing pairs, i.e., they are offset by 180.degree. in the circumferential direction of the roll at the same longitudinal position along the roll. The entire clearance space surrounding the sealing elements is filled with hydraulic fluid at a predetermined pressure, except for the areas in which the sealing elements are present. The interior chamber of one of the sealing elements in each pair can be filled with hydraulic fluid at a higher pressure than the pressure in the clearance space, while the interior chamber of the other one of the sealing elements of each pair can be filled with a hydraulic fluid under a lower pressure than that in the clearance space. In this manner, the individual forces of the sealing elements in a pair produce a net increased, resultant force in the same direction that acts against the hollow cylinder.
摘要:
A process for producing a smooth and glossy surface on a paper web and a calender arrangement for carrying out the process are disclosed. The calender arrangement comprises two sets of rolls through which the paper web is conducted in succession. Each set of rolls comprises a highly heated hard roll and a soft roll. A cooling device arranged upstream of at least one of the nips formed between the roll sets restricts the amount of heat transfer to the inner layers of the paper web and the attendant, undesirable partial plasticization of the inner layers of the web.
摘要:
A calender arrangement including a first stack of rolls with a first heated hard roll, which, together with a center soft roll, forms a nip. On the other side of the soft roll, another soft roll is arranged, which, together with the soft roll, forms another nip. A second stack of rolls with a soft roll which interacts with a second hard heated roll follows the first stack of rolls. The second hard heated roll contacts the paper web on the side lying opposite the side contacted by the first heated hard roll in the first stack. A further hard roll can also cooperate with the hard roll in the second stack to form a hard nip. The treatment that the paper web undergoes, varies in accordance with the type and sequence of the nips through which it is guided.
摘要:
A jig has two winding rolls in two troughs which surround the winding rolls concentrically and contain treatment liquor, and a squeezing device for a web of material passing from the one to the other winding roll arranged between the winding rolls. The squeezing device is arranged high enough that the web of material runs from the squeezing device downward toward both sides. A partition extends upward between the troughs up to the squeezing device.
摘要:
In a roll arrangement a control device is applied with information concerning the width of the web, and the pressure profile to be applied to the web, and the average pressure to be applied to the web. Control signals are generated provided to support elements which support a rotatable shell of a roll on a fixed beam to create an appropriate nip pressure.
摘要:
Calender for the treatment of a paper web, which comprises at least one roll stack that can be loaded from the end, has a stack plane and comprises end rolls and at least one intermediate roll, which comprise hard and soft rolls for forming working nips between a hard and a soft roll in each case, and some of the rolls being heatable, the roll stack having at least one intermediate roll, on whose periphery, on one roll stack side, two rolls that can in each case be displaced with respect to the stack plane bifurcate the roll stack.