摘要:
A device for fastening a roll to the frame construction in a paper machine, paper finishing machine, or equivalent, wherein the ends of the roll are provided with bearings. The bearing housings of the bearings, or fastening bases formed onto the bearing housings, are mounted against a back-up face formed on the frame construction so as to position the roll in its place on the machine frame. On the machine frame, fastening members are arranged to be displaceable in a direction substantially perpendicular to and against the back-up face formed on the frame construction and include flange portions, i.e., shoulders or equivalent formed pieces. Correspondingly, the bearing housings, or fastening bases arranged thereon, are provided with grooves corresponding to the shape of the flange portions of the fastening members. When the roll is installed in its place, the flange portions pass into the grooves in the bearing housings. Then, the fastening members tighten the bearing housings or the fastening bases, respectively, forcibly against the back-up faces on the frame construction.
摘要:
A method for manufacturing a calendar roll in which a continuous band of filler material is wound onto an axle until a desired diameter for the roll is obtained, and then an elastic coating is applied to an outermost surface of the band, i.e., the outermost layer of windings. An adhesive agent may be applied onto the band such that adjacent windings of the band adhere to one another during winding of the band onto the axle. Adjacent windings of the band in an uppermost layer of windings may be welded together to provide a foundation for the elastic coating. The calender roll includes an axle, a uniform and continuous band of filler material wound onto the axle to provide the roll with a desired diameter, and an elastic polymer coating arranged on an outermost layer of windings of the band on the axle.
摘要:
A calender in a paper or board machine comprises a calender frame, at least two soft-faced rolls mounted on the calender frame and at least one hard roll mounted on the calender frame in a manner that allows the hard roll to be displaced between a first position in which it forms calendering nips with the two soft-faced rolls and a second position in which it is spaced from the soft-faced rolls. During threading of the web; while the calender is in operation, the hard roll is shifted to its second position, the web is passed over the soft-faced rolls, and the hard roll is shifted back to its first position and brings the web into the nips between the hard roll and the soft-faced rolls.
摘要:
The invention concerns a blade coater and a method for coating a web backed by a rotatable backing roll. The blade coater unit includes a support structure, a feeder mounted to the support structure and capable of feeding the coating mix onto the web when brought close to the web in running conditions, and a smoothing device arranged to the immediate vicinity of the web for the application of the fed coating mix. The blade coater unit is essentially placed below the backing roll, the smoothing device is a flexible blade having a tip inclination angle .alpha. less than 20.degree., and the feeder has a narrow exit opening arranged to the stem of the flexible blade without any essential steps in order to facilitate a fast, laminar flow of the coating mix. The approach in accordance with the invention achieves a coat of high quality.
摘要:
Micro-protrusions, which constitute a diffractive microstructure, are produced by embossing the surface layer of a substrate by an embossing member having microgrooves in such a way that the cross-sectional area of a produced micro-protrusion is substantially smaller than the cross-sectional area of the microgroove producing said micro-protrusion. Thus, the embossing pressure is small, the risk of adhesion is reduced, it is possible to use a low embossing temperature, and microstructures may be produced at a high speed. Furthermore, the same embossing member may be used for producing a low microstructure, a normal microstructure, and a high microstructure.
摘要:
A method and a device for producing a diffractive microstructured area on the surface layer of a substrate by embossing. The device includes a die-cutting press that includes a press member and a backing member and at least one die-cutting tool arranged for die-cutting the substrate placed between the press member and the backing member. The press member and/or the backing member is provided with at least embossing pattern corresponding to the microstructured area, against which pattern the substrate is pressed during the embossing, when the substrate is introduced between the press member and the backing member for the embossing. A method for converting a die-cutting press to a die-cutting and embossing device for producing a diffractive microstructured area on the surface layer of a substrate by embossing, wherein the press member and/or the backing member of the die-cutting press is provided with at least one embossing pattern corresponding to the microstructured area for embossing.
摘要:
A diffractive microstructure is produced on the surface layer of a substrate using an embossing device. The embossing device includes an embossing roll and a backing roll for exerting an embossing pressure on the surface layer of the substrate. The embossing pressure and/or variations in temperature cause deflection of the embossing roll. To compensate for the deflection, the embossing device can set the embossing pressure exerted by the central area of the embossing roll on the surface layer of the substrate to be at least equal to or higher than the embossing pressure exerted by the end areas of the embossing roll on the surface layer of the substrate.
摘要:
A micro-optical grid structure is produced on a surface layer of a substrate by an embossing device and method. The embossing device includes an embossing member and a backing member, a temperature adjuster for adjusting the embossing temperature and a pressure adjuster for adjusting the pressure exerted by the embossing member and the backing member to the surface layer of the substrate. An optical measuring device is arranged to produce a diffraction signal dependent on the intensity of light diffracted from the surface of the substrate. The embossing pressure and/or temperature is/are adjusted on the basis of the diffraction signal to produce an optimal and even pattern depth of the grid structure. With the adjustment based on the diffraction signal, it is possible to avoid the sticking of the surface of the substrate to the embossing member due to too high an embossing temperature. When the pattern depth is optimal, collapse of the substrate caused by the too high embossing pressure is avoided.
摘要:
The invention relates to decoding digital information, where a surface of an object is illuminated with a first optical illumination from a first direction, the surface comprising microscopic embossed data units encoding digital information. A first primary digital microscopic image is recorded from the microscopic embossed data units with the first optical illumination. The surface is further illuminated with a second optical illumination from a second direction different from the first direction, and a second primary digital microscopic image is recorded from the microscopic embossed data units with the second optical illumination. A secondary digital microscopic image of the microscopic embossed data units is generated from the first primary digital microscopic image and the second primary digital microscopic image, and at least a part of the digital information is generated from the secondary digital microscopic image.
摘要:
The invention relates to a method for controlling a surface quality variable (300) in one or more fiber webs (3) in a shoe calender (1) comprising one or more calender nips. In each calender nip of the shoe calender, the overall loading pressure of the shoe element (8) and the loading pressure difference between the leading edge (8′) and the trailing edge (8″) of the shoe element are controlled so as to achieve minimum difference between the determined values (300″) for the surface quality variables of the fiber web and the set values (300′) for the same quality variables after the shoe calender.