392results about "Press section" patented technology

The invention discloses a novel corrugated paper squeezing device which comprises bearing frames, a conveying belt and a squeezing assembly used for squeezing corrugated paper, the number of the bearing frames is two, the conveying belt is located between the two bearing frames, a fixing frame is arranged at one end of each bearing frame, and a first squeezing roller and a second squeezing roller are arranged in each fixing frame; and the first extrusion roller and the second extrusion roller are symmetrically arranged up and down. The squeezing flannelette outside the conveying belt can reduce tile paper friction, avoid surface scratching and assist in absorbing a small amount of water, the synchronizer controls the electric push rod to stretch out and draw back synchronously and is matched with the guide rod to enable the rotating roller to press the tile paper evenly, local overpressure damage or non-uniform underpressure dehydration is prevented, the water collecting box can collect extruded water, and the valve can drain water in time. Accumulated water is prevented from polluting equipment or flowing back, consumption of follow-up clean water is reduced, residual moisture of the corrugated paper can be further removed through secondary squeezing, moisture residues are greatly reduced, drying power does not need to be additionally increased, and power consumption is reduced.

A method of forming a fibrous web on a papermaking machine including the steps of depositing a dilute fiber slurry out of a headbox to a forming area comprising a forming surface made up of a structured fabric, wherein the structured fabric is supported by a breast roll and a forming roll, and the forming area is devoid of any additional fabrics or belts other than the structured fabric, draining the dilute fiber slurry through the structured fabric, and drying the fiber slurry.

The invention relates to a waste water auxiliary drainage device for a rotary screen paper machine, which comprises a composite roller, a waste water drainage device and a waste water drainage device, wherein the composite roller is used for extruding coarse cotton cloth and is positioned above a screen part; the water guide mechanism is used for guiding and draining water extruded from the coarse cotton cloth; the water guide mechanism comprises a drainage assembly used for guiding water out; the energy reducing assembly is used for reducing the impact potential energy of water on the drainage assembly; and the water guide mechanism is arranged behind the composite roller along the motion direction of the coarse cotton cloth. According to the rotary screen paper machine, a traditional linear mop is improved into an innovative and adjustable splayed totally-closed dewatering device, so that the problem of water removal in a composite area of the rotary screen paper machine is successfully solved, and the quality of a final product is effectively improved.

According to an aspect of the present invention, there is provided a sleeve for a drum for use in forming, pressing or moulding a fibrous web, wherein the sleeve comprises at least two parts and each part has a form of an open-ended cylinder with two edges, configured to be arranged concentrically on the drum. At least one edge of each part has a peripheral locking form, and adjacent edges of adjacent parts have corresponding cooperating peripheral locking forms adapted to lock the parts to each other.

The invention relates to a machine (1) and to a corresponding method for producing an air-laid fibrous web (309). The machine (1) comprises: a) a raw material preparation system for a low-water preparation of cellulose-containing fibers in order to form individual fibers and / or fiber bundles (209); b) a dry-forming device (4) for dry-forming the individual fibers and / or fiber bundles (209) in an air stream in order to form a flat fiber fabric (300) on a forming belt (40); c) an application device (71) for applying a fluid, preferably water and / or a water-additive mixture, to the fiber fabric (300); d) a solidifying device (8) for solidifying the flat fiber fabric (300) by applying pressure in a press nip (80) when the fiber fabric (300) is guided through the press nip (80) on a press belt (41) onto which the fiber fabric (300) was previously transferred from the forming belt (40) in a transfer region (100); and additionally a fluid depositing device which is designed to then deposit the fluid on the press belt (41), the press belt (41) serving as an application device (71) for applying the fluid to the fiber fabric (300).

An electronic device for determining a location of a seal strip device in a strip of a papermaking machine includes a seal strip location identification component associated with the seal strip device, a current monitoring circuit configured to measure a current through the seal strip location identification component that is associated with the seal strip device, and a location circuit configured to transmit information related to the current through the seal strip location identification component, and configured to receive an address related to the location of the seal strip device. Related methods and systems are also described.

A sheet manufacturing apparatus includes a defibrator that defibrates a paper piece to form a defibrated material, an accumulator that accumulates the defibrated material on a mesh belt to form an accumulating material, a forming machine that forms the transported accumulating material to produce a strip-shaped sheet, and a return mechanism that sends a residual accumulating material that is the defibrated material being accumulating to the defibrator on condition that the accumulator has stopped or is stopped during accumulation.

The present invention relates to a tissue paper machine (100) comprising - a forming section (101), - a drying section (102) comprising a Yankee dryer (20) and a non-dewatering transfer nip formed (TN) between the Yankee dryer (20) and a press assembly (30) for transferring the paper web (W) from the structured fabric (10) to the Yankee dryer (20), - a structured fabric (10), wherein the transfer nip (TN) is an extended press nip, the press assembly (30) comprising a press shoe (31) and an actuator (60) configured to operate the press shoe (31) to form the transfer nip (TN), and wherein the actuator (60) is configured to generate a desired linear load in the transfer nip (TN) by operating the press shoe (31) to extend into the transfer nip (TN) with a desired pressure and to change the linear load during operation of the tissue paper machine (100).

A method of forming a fibrous web on a papermaking machine including the steps of depositing a dilute fiber slurry out of a headbox to a forming area comprising a forming surface made up of a structured fabric, wherein the structured fabric is supported by a breast roll and a forming roll, and the forming area is devoid of any additional fabrics or belts other than the structured fabric, draining the dilute fiber slurry through the structured fabric, and drying the fiber slurry.

The invention discloses a preparation method of degradable napkin based on natural plant fibers, and relates to the field of hygienic products. According to the preparation method of the degradable napkin based on the natural plant fibers, natural cellulose raw materials such as the sisal hemp waste residues and the banana stalks are adopted, the source is wide, and the cost is low. Raw materials are cleaned, crushed and degummed to prepare crude fiber bundles, and the crude fiber bundles are converted into soft microfibrillated cellulose colloid through enzyme treatment. Defibering part of the colloid into long-fiber matrix pulp, homogenizing the other part of the colloid at high pressure to prepare short-fiber reinforced pulp, mixing the long-fiber matrix pulp and the short-fiber reinforced pulp to obtain reinforced pulp, and performing papermaking, drying and calendering to prepare the raw paper. According to the process, through fiber softening treatment, the softness and hand feeling of the paper are remarkably improved while the toughness is kept, and the process is suitable for napkin production. A green biotechnology is adopted in the whole process, the pollution load is low, chemicals are biodegradable, and the requirements for low cost and environmental protection are met.

The invention discloses a carbon fiber paper-based material and a continuous calendering enhancement method thereof. The preparation method specifically comprises the following steps: repulping, grinding, defibering and sieving meta-aramid pulp, and then mixing with defibered and dispersed short carbon fibers to prepare paper pulp; sequentially carrying out forming, dewatering, squeezing and drying treatment on the slurry to obtain a carbon fiber base paper coiled material; and carrying out continuous calendaring enhancement treatment on the carbon fiber raw paper coiled material to obtain the carbon fiber paper. According to the method, the purpose that the temperature is higher than the glass transition temperature (larger than or equal to 273 DEG C) of the meta-aramid pulp can be achieved, the purpose of conducting hot pressing on the carbon fiber base paper can be achieved, the large-batch and continuous production requirements of the carbon fiber paper can be met, and the production efficiency is greatly improved.

A press cover for a press roll or a transport belt has at least one polyurethane-containing layer. The polyurethane is obtainable by reaction of i) a polyol component, ii) an isocyanate component, and iii) a component containing at least one crosslinker. The polyol component is composed of mutually different structural units having the general formula —O—R1—X—R2—O— in which all of R1 and R2 independently of one another are identical or different and are linear or branched C1-C20 alkylene groups. Groups X are identical or different and are selected from bond, O, C(O)—O, and O—C(O)—O. At least 70 wt % of the structural units meet the following criteria: a) at least 80% of X are O—C(O)—O and the remainder are O or C(O)—O, and b) the average chain length of R1 and R2 is 8 or more carbon atoms, and c) at least 50% of R1 and R2 are independently of one another a linear or branched C8-C12 alkylene group.

Displacement dewatering system, methods and apparatus, for liquid dewatering a nascent paper web in a papermaking machine nip. A press roll presents pressurized gas to the web through one or more stationary pressure zones. Each pressure zone has a seal assembly which bears on the inside surface of the outer shell of the press roll, isolating the respective pressure zone from any adjacent pressure zones. Pressurized gas passes through the one or more pressure zones, thence into and through apertures in the shell, thence into and / or through the web. A vent receptive device receives air and water exiting the web. Methods and apparatus are provided for controlling seal temperature and / or seal pressure and / or seal friction, as well as controlling light leaking past the seal.

The invention discloses a manufacturing method of an environment-friendly paper product. The environment-friendly paper product is prepared from the following raw materials in parts by mass: 60-70 parts of a main fiber raw material, 25-35 parts of an auxiliary fiber raw material, 3-8 parts of an environment-friendly additive and 1-2 parts of a pretreating agent. By means of the components, by adding the auxiliary fiber raw materials, the environmental protection property is remarkably improved, waste cotton and linen and agricultural waste are converted into papermaking raw materials, consumption of primary fibers is reduced, meanwhile, waste recycling is achieved, and pollution caused by incineration and landfill is reduced. The auxiliary fibers and the main fibers have a synergistic effect and are matched with the environment-friendly auxiliaries to reinforce the quality of the paper, the cotton and linen fibers improve the flexibility, the agricultural waste fibers enhance the stiffness, lignin and short fibers are separated through low-temperature pyrolysis, impurities are prevented from affecting the performance of the paper, and solid powder rich in the lignin and the short fibers is recycled and reused.

The utility model relates to a device for preventing paper leading roller of paper machine and paper machine, including: paper leading portion and spraying portion, the paper leading portion includes paper leading roller, vacuum suction box and paper leading blanket, vacuum suction box is provided at the input end of paper leading roller, the paper leading blanket is covered outside the paper leading roller, and the spraying portion is provided with the vacuum suction box and the paper leading blanket. The vacuum suction box is covered with the paper injection blanket; the spraying part comprises at least two groups of spraying pipes and a plurality of sprayers, the at least two groups of spraying pipes are symmetrically arranged on two sides of the paper injection blanket, the at least two groups of spraying pipes are arranged between the vacuum suction box and the paper injection roller, the plurality of sprayers are arranged on the spraying pipes, and the sprayers directly face the paper injection blanket. According to the utility model, the problem of edge drop of the paper guide roller caused by high initial air permeability of the blanket can be avoided, and the operation efficiency of the paper machine is improved.

This invention provides a boot-shaped press belt with suppressed strength imbalances between components and excellent strength, as well as a method for preparing the boot-shaped press belt. A boot-shaped press belt for a paper machine has at least one resin layer comprising a polyurethane resin containing an isocyanate prepolymer cured by a curing agent having active hydrogen groups. The urethane prepolymer is obtained by reacting a polyisocyanate compound containing 4,4'-methylenebis(phenyl isocyanate) with a polyol compound containing polytetramethylene ether diol. The curing agent comprises polycarbonate diol.

The invention relates to a method for adjusting a component, in particular a functional roller, for a machine for producing or processing a fibrous web, the component having at least one adjustment device for adjusting an operating state of the component, the method comprising the following steps: carrying out an image capture and / or video capture of the exterior of the component and transmitting the capture to a computing unit; determining an actual value of the operating state by means of the computing unit by image analysis of the image capture and / or video capture of the exterior of the component and / or by the acquisition of values from an embedded sensor system. On the basis of the determined actual values of the operating state: presenting metainformation regarding the adjustment of the adjustment device by overlay with the image capture and / or video capture on a display.

The utility model discloses a reciprocating motion piece for a vacuum roller and a stable supporting device of the reciprocating motion piece, and belongs to the technical field of vacuum rollers. Comprising two sets of mounting bases arranged side by side, the mounting bases are frame bodies with hollow middles, a driving motor is mounted at the end of one mounting base, the output end of the driving motor is connected with a transmission assembly, two sets of driving assemblies are mounted at the top of the mounting base, the driving assemblies are located at the two ends of the transmission assembly, and the driving assemblies are in transmission connection with the transmission assembly; the transmission assembly drives the two driving assemblies to rotate in the opposite directions, moving assemblies are slidably mounted on the top face of the mounting base in the length direction of the mounting base, and the moving assemblies are in engaged connection with the driving assemblies to drive the moving assemblies to be close to or away from each other. According to the utility model, the operation process is simplified, the possibility of manual misoperation is avoided, the roller is driven by the moving component to reciprocate, the roller can be prevented from repeatedly wearing the fixed position of the vacuum roller, and the service life of the vacuum roller is prolonged.

The utility model relates to the technical field of squeezing parts, in particular to a vacuum squeezing dewatering roller set for papermaking, which comprises a support, a squeezing roller, a sliding plate, a nozzle, a cleaning structure and a fixing structure, auxiliary rollers are symmetrically and rotatably connected in the support, the squeezing roller is rotatably connected below the auxiliary rollers in the support, and the sliding plate is arranged on the sliding plate. A sliding plate is fixedly connected into the support, a reciprocating screw rod is rotatably connected into the sliding plate, a spray head is slidably connected to the side, close to the press roll, of the sliding plate, a sliding block is rotatably connected to the end, close to the reciprocating screw rod, of the spray head, and the sliding block is in meshed connection with the reciprocating screw rod; the cleaning structure comprises a brush seat, the brush seat is slidably connected to the position, located on one side of the press roll, in the support, and a fixing structure used for fixing the brush plate is installed in the brush seat. The vacuum press dewatering roll set for papermaking has the advantages of being automatic in cleaning and maintenance, fast in brush plate replacement and capable of collecting waste water.

This utility model discloses a composite suction zone papermaking vacuum roll core, belonging to the field of papermaking vacuum rolls. The outer end of the roll core's rotating shaft is connected to an assembly roller via a bearing assembly. A vacuum roll sleeve is provided between two assembly rollers. Multiple inserts are provided on the side wall of the vacuum roll sleeve, and the side wall of the assembly roller has fitting slots that mate with the inserts. The insertions and fittings achieve a limiting connection between the assembly roller and the vacuum roll sleeve. The cooperation between the inserts and fittings enables a quick limiting connection between the vacuum roll sleeve and the assembly roller, simplifying assembly and disassembly, ensuring precise alignment, and guaranteeing stable and efficient papermaking liquid suction operation. The spiral connecting strip and flow hole design ensure a firm connection between the vacuum roll sleeve and the spiral connecting strip, improving the liquid suction effect, facilitating quick replacement, and reducing maintenance costs. Vacuum nozzles evenly installed on the roll core generate suction through the internal vacuum chamber, efficiently adsorbing liquids such as pulp. The quick assembly / disassembly system allows for rapid assembly and disassembly when changing vacuum nozzles, reducing downtime and improving equipment utilization.

A machine or apparatus for producing structured tissue or towel using a press section.

The invention relates to the technical field of papermaking, and provides papermaking squeezing and dewatering equipment which comprises a squeezing box and further comprises a filter plate, two squeezing rollers, two sliding frames, a rotating shaft and a supporting mechanism, the filter plate is fixedly connected into the squeezing box, the two squeezing rollers are located at the upper end and the lower end of the filter plate respectively, and the two sliding frames are located at the upper end and the lower end of the filter plate respectively. The two sliding frames are arranged on the two sides of the squeezing box through the moving mechanism, the moving mechanism is used for driving the two sliding frames to move synchronously, the two rotating shafts are rotationally arranged between the two sliding frames through the swing mechanism, the swing mechanism is used for driving the two rotating shafts to swing in an angle mode, and the two supporting mechanisms are arranged on the two sides of the squeezing box. The two supporting mechanisms are both arranged between the two sliding frames, and by means of the technical scheme, the problems that in the prior art, wet paper sheets are fragile, the phenomenon that the wet paper sheets are prone to being torn in the moving process, and then the paper sheets are prone to being wasted are solved.

The seal strip and wear monitoring system includes a seal strip having a top surface; and a wear monitoring system including a sensing portion including a plurality of electrical traces, each of the plurality of electrical traces having a top portion generally parallel to and disposed at a predetermined depth from the top surface of the seal strip, where the depth of the top portion of each trace is different from the depth of the top portions of other electrical traces; and a signal processing portion electrically connected to the plurality of electrical traces, the signal processing portion including circuitry configured to detect electrical signals from the plurality of traces and to determine when the top portion of a trace has been damaged.

The utility model discloses a papermaking press roll structure which comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a support, the inner surface of the support is rotationally connected with a press roll, the side surface of the support is fixedly connected with a motor, the press roll is driven by the motor, a vacuum bin is arranged on the press roll, a water guide bin is arranged on the press roll, and the vacuum bin is communicated with the water guide bin. The inner wall of the press roll is communicated with a plurality of suction pipes, the suction pipes are communicated with a water guide bin, a water outlet is formed in the water guide bin, the outer wall of the press roll is rotationally connected with a flow guide box, the flow guide box is communicated with the water outlet, the lower surface of the flow guide box is communicated with a flow guide pipe, and the upper surface of the support is fixedly connected with a cleaning box. Impurities such as fibers and sizing materials adhere to the surface of the press roll, the water absorption effect is guaranteed, it can be guaranteed that the surface of the press roll is clean and smooth, and scratches, holes or spots and other flaws on the surface of paper are reduced.

A pressure sensing belt for a shoe press or the like, comprising: a substantially cylindrical polymeric belt having a longitudinal axis, a radially inner surface and a radially outer surface; a plurality of reinforcing transverse machine direction (CD) fibers extending parallel to the longitudinal axis between the inner surface and the outer surface for a length of the belt; a plurality of reinforcing machine direction (MD) fibers extending circumferentially relative to the longitudinal axis between the inner surface and the outer surface; and a plurality of piezoelectric fibers extending within the belt, the piezoelectric fibers each having a sensing portion and a signal transmitting portion.

The invention relates to a former for a paper machine for producing a fibrous material web (1), in particular a paper, card, tissue or packaging paper web, comprising a forming fabric (2) which forms a loop and on which the fibrous material web (1) lies, the forming fabric and fibrous material web being guided together via a deflection roller (3) inside the loop to a pickup point (4) at which the fibrous material web (1) is taken from the forming fabric (2) by a clothing (6), a suctioned suction element (7) with openings (9) facing the forming fabric (2) being situated inside the loop directly before the pickup point (4) and directly after the deflection roller (3). The invention is characterised in that the deflection roller (3) is not suctioned and has at least one spiral groove (10) in the circumferential direction on the surface, and in that the suction element (7) is preferably in the form of a high-vacuum suction device.

The utility model discloses a paper machine press roll with high wear resistance, which comprises a rotating shaft and a sealing block, the middle part of the shaft wall of the rotating shaft is fixedly connected with a roll body, the two sides of the shaft wall of the rotating shaft close to the roll body are fixedly connected with mounting rings, the ring wall of one of the mounting rings is fixedly connected with an air pump, the output end of the air pump is fixedly connected with a joint, and the joint is fixedly connected with the sealing block. A spiral channel is formed in the roller body, one end of the spiral channel penetrates to the outer wall of the roller body, a plurality of first oil outlet holes are formed in the end, located in the spiral channel, of the roller body in a penetrating mode, a plurality of second oil outlet holes are formed in the end, located in the spiral channel, of the roller body in a penetrating mode, and couplings are arranged at the two ends of the shaft wall of the rotating shaft. According to the press roll, the pressure loss of the press roll can be compensated, so that lubricating oil can reach all points more uniformly, the abrasion of the press roll is reduced, and the service life of the press roll is further prolonged.

Method for producing a packaging paper web, in particular a testliner paper web, wherein the dryness of the packaging paper web is increased in a press section, wherein the press section comprises at least a pre-press and a main press downstream of the pre-press, wherein the main press is simply felted and has an extended press gap, wherein the extended press gap is formed at least partially by a stationary press shoe and a shoe press jacket moving around the press shoe, wherein the shoe press jacket has at least one drainage groove and / or at least one blind bore and comprises at least one layer of polyurethane.The polyurethane is selected in such a way that the thickness loss after a dynamic compression test, in which a 5mm thick sample of pure polyurethane is dynamically subjected to a sinusoidal load of 15MPa at 60°C for 4 hours at a frequency of 10Hz, is less than 10%.

This invention relates to the field of Xuan paper production, specifically to a specialized modern papermaking machine for producing Xuan paper without synthetic polymers. The papermaking machine includes an interconnected pulp tank and headbox. Inside the headbox, a cylindrical wire cage with its lower part immersed in the pulp is rotatably mounted. As the cylindrical wire cage rotates, a loose, wet sheet is formed on the wire surface. An air compressor is located beside the pulp tank. A closed-loop long wire is located on one side of the cylindrical wire cage. The long wire is tangential to the outer wall of the cylindrical wire cage, forming a transfer bonding area. A peeling mechanism is provided in the transfer bonding area to transfer the wet sheet to the long wire. The peeling mechanism includes a peeling plate with a main air channel connected to the air compressor. One end of the peeling plate has a rubber cone plate with a peeling air channel, and the other end has a peeling water channel. A pressing mechanism is located at the upper end of the peeling plate. This invention enables continuous production of Xuan paper, fully preserving the core qualities of traditional Xuan paper. The wet sheet is transferred without damage or residue, exhibiting strong production stability and suitability for large-scale continuous production of Xuan paper.

The utility model discloses an insertion roller cantilever support which comprises an installation rod, a support assembly is arranged on the top of the installation rod, a supporting assembly is arranged on the top of the support assembly, the support assembly comprises vertical rods, and the vertical rods are fixedly installed on the left side and the right side of the top of the installation rod. A top cross rod is fixedly installed between the tops of the left and right corresponding top connecting rods, and a copper pressing block is fixedly installed at the bottom of each top connecting rod. According to the insertion roller cantilever support, the first sliding block and the second sliding block slide on the sliding rail to drive the upper sliding rod to move, the sliding rods move to drive the top connecting rod on the inner side to move, and therefore the lower copper pressing block is driven to move to the position above the end of the roller body, and under the gravity effect of the outer end face of the roller body, the roller body downwards extrudes the copper pressing block; therefore, one end of the roller body is supported through the copper pressing block and the copper block support, and the use purpose that one end of the roller body is fixed and the other end is suspended is achieved.