摘要:
Process for guiding a web from one treatment station to another in a web manufacturing or treatment process. The process includes guiding the web with at least one pneumatic support device and controlling air pressure in the at least one pneumatic support device via a microprocessor. The air pressure is related to at least one quality factor of the web.
摘要:
Reel cutter and method for a substantially continuously winding-on of partial web rolls. The reel cutter may include a cutting section adapted for cutting a material web into a plurality of partial webs and a winding section adapted for winding the plurality of partial webs onto partial web rolls. The partial web rolls may be arranged such that neighboring partial web rolls are located in winding position groups positionally offset from one another. The winding section may include at least one additional and no more than twice the number of winding position groups necessary for winding-on of the partial web rolls. The method may include positionally offsetting at least a first and second winding position groups such that each winding position group includes a plurality of winding positions that are axially spaced apart, positionally offsetting at least a third winding position group, alternatingly guiding neighboring partial webs to the first and second winding position groups, and winding the partial webs into partial web rolls. The method may also include preparing the third winding position group to include winding positions that correspond to the first winding group, completing the winding on of the partial web rolls of the first winding group, and transferring the partial webs from the first winding group to the third winding group.
摘要:
A device and method for packaging a web roll, having a longitudinal axis, with a packaging sheet. The device includes a packaging sheet dispenser which dispenses the packaging sheet to produce a body packaging by dispensing, on at least a portion of a longitudinal extent of the web roll, the packaging sheet. The packaging sheet dispenser is positioned to dispense the packaging sheet to form an acute angle between the lateral direction of the packaging sheet and the longitudinal axis. The packaging sheet dispenser is further arranged to dispense the packaging sheet to produce an end packaging having an axial projection on an end of the web roll. The packaging sheet dispenser is posited so that the lateral direction of the packaging sheet is substantially parallel to the longitudinal axis. During the production of the body packaging, the web roll migrates, which leads to problems in the subsequent placement of the face cover by the packing presses. To ease these problems, the packaging device further includes a packing press device that includes packing presses positioned to move parallel to the longitudinal axis. The packing presses are associated with end faces of the web roll and are independently positionable. The method includes forming an end packaging at a first end of the web roll that includes an axial projection, axially moving a packing plate toward the first end of the web roll, sensing the axial projection of the end packaging of the web roll, detecting placement of the packing plate relative to the axial projection, and pressing the packing plate against the first end of the web roll.
摘要:
Calender that may include two separately operable roll stacks. Each roll stack may include a top roll composed of a deflection compensation roll and a bottom roll composed of a deflection compensation roll. The two roll stacks may be arranged one atop the other.
摘要:
An apparatus and method for packaging a roll of web material with a packaging material includes a wrapping station that has a roller drive. A packaging strip dispenser has a packaging material delivery device. A position of the packaging strip delivery device is adjustable so that an acute angle is defined between a longitudinal axis of the packaging material being dispensed by the packaging material delivery device and a circumferential direction of the roll of web material. The circumferential direction is a direction that is tangent to a circumferential surface of the roll and is parallel to an axial end of the roll. The packaging material is axially movable with respect to the roll of web material. A first strip of the packaging material is placed against the roll so that a longitudinal axis of the first strip of packaging material is disposed at an acute angle with respect to the circumferential direction of the roll of web material. The first strip of packaging material is helically wrapped around the roll of web material.
摘要:
A calender roller has a cylindrical base body and a covering made of a flexible plastic material. The covering has an inside diameter that is greater than an outside diameter of the base body to define an intermediate annular space therebetween. A support structure is disposed in the intermediate space to transmit load forces from the covering to the base body.
摘要:
A method and apparatus for processing a longitudinally traveling web of material using a sheet treating device positioned in a transverse direction relative to the web. The sheet treating device having a plurality of individually controllable zones for controlling a target parameter of the web, for example, the thickness, bulk, dampness, smoothness or sheen of the web. In conjunction with the sheetmaking device, a measuring instrument for measuring an actual value of the target parameter is placed downstream of the sheet treating device. An actual profile that is determined by the actual values is compared with a desired profile, and the zones of the sheet treating device are adjusted such that the discrepancies between the two profiles are minimized. To improve the matching of the actual profile to the desired profile even further, the web and/or the sheet treating device are shifted relative to the other in the transverse direction to minimize the discrepancies between the two profiles.
摘要:
A calender for full and light calendering has rollers disposed one above the other. At least the middle rollers are mounted on bearing blocks, which are supported by levers. The levers are pivotably mounted on respective support blocks. The levers can pivot between an upper stop and a lower stop. A lifting device for the lowest roller moves the lowest roller through a separation stroke between an operating position and a separation position. The lifting device also move the lowest roller through an overstroke between the operating position, through a relief position in which the support blocks are spaced from their respective support elements, into an overstroke position, in which the support blocks of some of the uppermost rollers are lifted to an inactive position to permit the calender to be used for light calendering.
摘要:
A calender for webs of paper includes a hard roller having a smooth outer surface. A soft roller is disposed adjacent to the hard roller and forms a roll gap therebetween. The soft roller has a coating made of flexible plastic. The coating includes an inner layer and an outer layer. The inner layer is made of a first plastic material and the outer layer is made of a second plastic material. The outer layer has lesser flexibility and greater hardness than the inner layer. The outer layer has an outer surface having wear properties such that under normal operating conditions the average roughness R.sub.a does not exceed 0.5 .mu.m.
摘要:
A pressing apparatus for web-shaped material, especially for smoothing a paper web, has a pressure gap between a roller and a concave pressure shoe. The pressure shoe is loaded by at least two loading elements, which are displaced in the circumferential direction of the roller, and whose loading forces can be adjusted individually. In this way, any desired pressure-stress profile can be set over the width of the pressure gap. Additionally, the radius of curvature of the concave pressure shoe is variable as a function of the loading forces.