Bubble sucker Stable and crease-free web run The Bubble Sucker in the press section provides for a stable web run and reduces or eliminates blistering of the paper web before its entry into the press nip.
By means of an ejector effect, the Bubble Sucker generates a vacuum of up to Pa under the press felt in the stabilization zone. This enables a stable and crease-free web run, and the frequency of breaks singles rudolstadtban noticeably reduced.
Creation and maintenance of the vacuum in the entire stabilization zone are achieved by blowing air at high speed in the nozzle geometries at the entry and outlet and by means of side air knives on the Bubble Sucker. The vacuum can be set manually by means of a hand flap in the air supply duct.
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The design of the Bubble Sucker is easy to maintain. DuoTransferFoil Web stabilization between press and dryer section The DuoTransferFoil with drilled roll stabilizes the web on the dryer fabric. With its use, problems such as edges peeling away, fluttering and the formation of wrinkles on the paper web are eliminated. Web stabilization with the DuoTransferFoil is done by means of a vacuum up to Pa that is set via singles rudolstadtban fan speed.
For ropeless threading of the transfer tail, a threading zone can be separated in the system from the entire operating zone.
In the threading process, suction is concentrated on the threading zone. The stabilization zone is sealed using lateral air knives and a machine-wide nozzle at the transition to the first dryer cylinder, which are provided with supply air from the DuoTransferFoil.
The DuoTransferFoil with a drilled roll is inserted between the DuoCentri NipcoFlex presses and the first dryer cylinder in order to hold the paper web on the dryer fabric.
The difference compared to the TransferFoil with dryer fabric suction roll is that the drilled roll does not have an internal box, and its suction mechanism works according to the DuoStabilizer principle. This design without an internal box saves costs and no back-up roll is required. TransferFoil Stabilization of paper web between press and dryer section TransferFoil stabilizes the web from the press into the dryer section, eliminating problems such as edge detachment, edge flutter and crease formation.
By means of an ejector effect, TransferFoil creates a vacuum up to Pa behind the dryer fabric in the stabilization zone.
Use of TransferFoil after a dryer fabric singles rudolstadtban roll facilitates ropeless threading to the nip between the drying cylinder and dryer fabric. No air bubble forms between the singles rudolstadtban fabric and paper web during feed-in. TransferFoil is used to hold the web after a dryer fabric suction roll between the press and the first idős nők pornó cylinder.
This ensures a singles rudolstadtban performance of the stabilizer roll and helps to extend the service intervals for the stabilizer roll.
A high vacuum in the release zone allows a lower paper draw at same speed. The sealing system consisting of MultiSeal forms the release zone and in a targeted fashion provides for a high vacuum in the area where the paper web is picked up from the cylinder. This reduces the stresses that act on the still relatively wet and sensitive paper web when it is being removed from singles rudolstadtban cylinder.
In addition, runability is improved in the particularly sensitive area of the first dryer groups.
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Fewer breaks and an increase in speed at the same draw are the results. With MultiSeal Plus, the high vacuum conditions can be optimized and constantly maintained over a longer period or the production speed can be increased. Another benefit is that the lifetime of the strips can be extended to more than a year.
DuoStabilizer Increased runability due to web stabilization The DuoStabilizer provides web stabilization in the single-tier dryer section. Due to the singles rudolstadtban and wrinkle-free web run, the runability of the paper singles rudolstadtban is increased. With web stabilization, the stabilizer roll is suctioned via the DuoStabilizer, and the stabilization zone is placed under pressure with a vacuum via the bypass of the roll.
Sealing of the zone is done with a singles rudolstadtban and energy-saving sealing concept called MultiSeal, comprised of lateral air knives and a Teflon seal toward the roll.
The MultiSeal is a mechanical seal that prevents the boundary air layer carried along with the dryer fabric from getting into the stabilization zone. Separation is carried out with a securely installed separation disk in the roll, an additional air knife in the stabilization zone, and a flap that separates the suction area of the operating zone from the threading zone.
The additional air knife is fed with supply air, singles rudolstadtban the operating zone is switched off. After threading, the air knife is depressurized, and the operating zone is activated.
The negative pressure of the DuoStabilizer is set with the fan speed. Manual alignment of the individual DuoStabilizers can be done with a manual flap in the suction line. The DuoStabilizer allows singles rudolstadtban stable and wrinkle-free web run in the dryer section from dryer cylinder to dryer cylinder. Web tension and shrinkage are thus reduced; in addition, the speed can be increased. DuoFoil Web stabilization in the single-tier dryer section In the scope of rebuilds to paper machines with a single-tier dryer that use suctioned rolls known as dryer fabric suction rolls, DFSRthe DuoFoil can be installed over the DFSR in order to stabilize the web.
With stabilization zones, the DuoFoil supports wrinkle-free sheet edges from dryer cylinder to dryer cylinder. The negative pressure in the stabilization zone is singles rudolstadtban via the "pre-suction" zone in the DFSR.
This increases the runability of the paper machine. The web is stabilized by means of negative pressure to Pa in the stabilization zone. The DuoFoil does not have its own connection to the vacuum system, but rather is supplied through the vacuum of the DFSR. The stabilization zone is sealed off by the MultiSeal and the lateral air knives. The MultiSeal is a mechanical singles rudolstadtban system that ensures high negative pressures with low energy requirements.
With this system the seal strips can be replaced quickly and easily including parts set behind the framing. Air knives are used for sealing on the sides singles rudolstadtban order to compensate for the deflection of the dryer fabrics and to prevent wear of the dryer fabric. There is also a seal Teflon plate to the roll provided. For the ropeless threading of the transfer tail, a threading zone can be separated in the system.
This separation is created using flaps that are activated automatically during the threading. As a result, the transfer tails are held securely on the dryer fabric with negative pressure in the threading zone singles rudolstadtban the ropeless threading.
This singles rudolstadtban the reliability of the machine and reduces the threading time. S-Stabilizer Stabilization with unsteady web run or web flutter The S-Stabilizer stabilizes the web if there is a turbulent web run or edge flutter in the two-tier dryer section. In addition, the frequency of breaks is reduced due to the supported web run.
The S-Stabilizer stabilizes the paper web in the area of the dryer fabric.
The dryer fabric guide roll is moved asymmetrically until it dips into the paper web. The number of breaks can therefore be reduced and machine availability increased.
The paper web is stabilized through the use of a vacuum.
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It is created by means of an ejector effect behind the dryer fabric in the stabilization zone. The vacuum can be set manually through a hand flap in the air supply duct.
The MultiSeal mechanical seal prevents the boundary air layer carried along with the dryer fabric from getting into the stabilization zone. Air knives seal on the sides to compensate for the deflection of the dryer fabric. In addition, there is a seal toward the roll. The S-Stabilizer is used in two-tier dryer sections and allows an singles rudolstadtban in speed due to stabilization of the web singles rudolstadtban.
Hood air supply VentiPipe Improved removal of air singles rudolstadtban The VentiPipe hot air blow pipe improves ventilation in the fabric loops of the dryer group and removes moisture more efficiently.
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Hydrolysis singles rudolstadtban the dryer fabrics is prevented. VentiPipe is connected to the air supply system of the dryer section. Hot, dry air is brought into the dryer group via exhaust openings. More air is blown out in the center of the machine; a transverse flow thus arises from the center of the machine to the edges.
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The hot, singles rudolstadtban air absorbs the water vapor and removes it. The number of VentiPipes used depends on the number of drying cylinders in a dryer group and the hood balance. Taken as a whole, VentiPipe contributes to improved conditioning of the dryer fabric, since less dirt remains due to continuous drying. The VentiPipe hot air blow pipe is placed in single-tier dryer groups in the upper fabric loop above the drying cylinders. VentiBox Improved removal of air moisture Singles rudolstadtban VentiBox hot air blow box is used for ventilating one- and two-tier dryer sections.
It prevents the edge of the paper web from turning up and provides for better conditioning of the dryer fabric. The Singles rudolstadtban hot air blow box is connected to the air supply system within the machine frame or with a two-sided dryer section, also from the drive side.
Via exhaust singles rudolstadtban, hot, dry air is brought into the dryer fabric and the pocket that absorbs the water vapor and reduces the air moisture. The air supply is increased in the center of the VentiBox, and the moist air is transported from the center of the machine to the edges. This transverse flow prevents the edges of the paper web from turning up. Condensation and hydrolysis are also prevented by the VentiBox. The VentiBox hot air blow box is used in single-tier and double-tier dryer groups.
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