216results about "Press section" patented technology

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 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.

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.

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.

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 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.

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 present invention relates to a support body (50) for a paper machine having an extended nip formed between the support body and a counter-pressure member, wherein the support body comprises—a base body (51) comprising an upper surface facing in the first direction, —a cover body (52) comprising a working surface (15) for forming an extended nip with a counter-pressure member, wherein the cover body (52) is mounted on the upper surface of the base body (51) such that the working surface faces in the first direction, and wherein the cover body (52) comprises a first material, said first material being a polymer. The invention also relates to a paper machine comprising a support body (50).

The invention relates to a press body for a paper machine having an extended nip formed between the press body and a counter-pressure member, in which the press body (50) is elastically deformable and comprises a working surface (15), and in which the press body comprises a first pressure chamber (51) and a second pressure chamber (52), the first pressure chamber (51) and the second pressure chamber (52) are arranged inside the pressing body (50) and separated from each other by a partition wall (55), the pressure chambers (51, 52) are configured to be pressurized such that the pressing body (50) expands in order to press the working surface (15) towards the counter pressure member, and wherein the first pressure chamber (51) has a first height (h1) and the second pressure chamber (52) has a second height (h2). The second pressure chamber (52) has a second height (h2), and wherein the first height (h1) is greater than the second height (h2). The invention also relates to a paper machine comprising such a press body.

The application discloses a non-asbestos yarn and a manufacturing method and application thereof. The non-asbestos yarn is spun by using a papermaking method with mineral fibers and cotton pulp and / or waste paper pulp, the mineral fibers are any one or several of sepiolite, brucite and wollastonite, the amount of the mineral fibers is 70-100%, and the amount of the cotton pulp and / or waste paper pulp is 0-30%. The application further provides a manufacturing method of the non-asbestos yarn, the mineral fibers, the cotton pulp and the waste paper pulp are prepared through pulp preparation, papermaking, cutting, twisting and plying. The non-asbestos yarn is used for manufacturing friction materials and sealing materials. The non-asbestos yarn can replace the asbestos yarn, solves the harm caused by traditional asbestos, has simple manufacturing process, convenient operation, avoids environmental pollution, low cost, and is equivalent to the asbestos yarn in ignition loss and tensile strength at room temperature, and can completely replace the asbestos yarn and be used for manufacturing friction materials and sealing materials.

The utility model discloses a paper machine vacuum suction shifting roller which comprises a rotating shell, a roller body suction through hole is formed in the rotating shell, a built-in vacuum box body is fixedly connected to the inner surface of the rotating shell, and a stepping motor is fixedly connected to the outer surface of the built-in vacuum box body. A sealing bearing is rotationally connected to the outer surface of the other end of the built-in vacuum box body, a moisture residue suction pipe is fixedly connected to the outer surface of the sealing bearing, a high-pressure-resistant moisture residue recovery chamber penetrates through the side surface of the moisture residue suction pipe, and a moisture residue outflow pipe penetrates through the interior of the high-pressure-resistant moisture residue recovery chamber. A vacuum instrument mounting through hole is formed in the vacuum box; through the cooperative use of the components, the efficient operation of the vacuum suction and transfer roller of the paper machine is realized, the residues are effectively recycled and prepared for subsequent reutilization, and in addition, the safety of equipment and personnel is also ensured.

The invention relates to a cantilever screen changing device of a large cylinder hot pressing drying part of a paper machine, which comprises a rack and a concrete base, the rack comprises a transmission side bracket, an operation side bracket and a cantilever beam, the operation side bracket is provided with a plurality of channels for a screen blanket to pass through, the channels are internally provided with extraction seats, the extraction seats are detachably arranged in the channels, and the cantilever beam is arranged on the concrete base. One end of each cantilever beam is fixedly connected to the operation side support, a reinforcing rod is arranged at the other end of each cantilever beam, and a pull rod is arranged on one cantilever beam; the device has the advantages that the channel allowing the net blanket to penetrate through is formed in the operation side support, so that when the machine is stopped for net replacement, only the drawing-out base in the channel needs to be taken out, the net blanket can be drawn out from the channel, then a new net blanket is pushed into the machine frame from the channel to complete installation of the new net blanket, and finally the drawing-out base is reset, so that the net replacement operation can be completed; the whole screen changing operation does not need to disassemble the carrier rollers and the guide rollers, so that the working intensity of operators is greatly reduced, the screen changing efficiency is improved, and the downtime is shortened.

The invention relates to a press body for a paper machine having an extended press zone formed between the press body and a counter pressure member wherein the press body is elastically deformable and comprises a working surface, and wherein the press body comprises a first pressure chamber and a second pressure chamber, the first and second pressure chambers are arranged inside the press body and separated from each other by a partition wall, said pressure chambers being configured to be pressurized such that the press body expands for pressing the working surface towards the counter pressure member, and wherein the partition wall between the first and second pressure chambers has a wall thickness of 1 mm to 20 mm. The invention also relates to a paper machine comprising at least one press body.

The invention relates to a web stabilizer (1) for a machine for producing webs, and is characterized in that the web (3) is sealed at the end side by means of a sealing element (6) or by means of a further sealing element (8) that can be moved relative to the web (3). The invention allows an advantageous and particularly energy-saving negative pressure design to be achieved in the field of use of the web stabilizer (1).

The invention relates to the technical field of papermaking, and provides a hot-pressing reinforcement method for fiber interface reinforcement. The method comprises the following steps: S100, in a hot pressing area, carrying out hot pressing treatment on a wet paper web to obtain an intermediate paper web; and S200, drying and shaping the middle paper web to obtain finished paper. Impulse type pressing pressure is introduced in the medium-pressure stage of hot pressing treatment and cooperates with heating, so that an interlayer bonding area is promoted to undergo periodic high-pressure compaction and low-pressure rebound, interlayer fibers are driven to be subjected to controlled rearrangement and embedment, meanwhile, directional migration and redistribution of interface moisture are promoted, and the interface moisture content is improved. Therefore, residual water films are reduced, the effective contact area is enlarged, the interlayer bonding strength is enhanced, layering is inhibited, and the problems that the interlayer bonding strength of multiple layers of paper sheets is low, and layering is prone to occurring in subsequent processing are solved.

The present application relates to the technical field of environment-friendly tableware manufacturing, and provides a process and equipment for directly pressing tableware, which comprises the steps of pulp preparation, pulp mixing and pulp supply, semi-dry paper web forming, wet paper web roll cutting and hot pressing. The process for directly pressing tableware provided by the present application firstly performs pulp preparation, pulp mixing and pulp supply; then the pulp after pulp preparation is transported to a paper machine to form a semi-dry wet paper web through at least three-stage roll pressing and dewatering; then the semi-dry wet paper web is transported to a roll cutting machine to form a wet pressing paper blank and corner waste through roll cutting; the wet pressing paper blank is transported to a setting equipment to form a tableware product and corner material through hot pressing; and the semi-dry wet paper web can be directly roll cut into a wet pressing paper blank on the roll cutting machine without drying, and the wet pressing paper blank can be directly hot pressed into a tableware product on the setting equipment without re-wetting, so that the process is simple, a continuous production process can be formed, energy consumption is lower, production efficiency is higher, and production cost is lower.

An apparatus includes: a defibrating unit that defibrates a material to turn it into fibers; a fiber piling-up unit that piles up the fibers to form a second web; a pressing portion that presses the second web to turn it into a sheet; and a humidifying mechanism that supplies humidified air to the fiber piling-up unit. The fiber piling-up unit includes a rotating portion that stirs the fibers supplied from the defibrating unit, a case in which the rotating portion is housed, and a mesh belt that is provided under the case and transports the second web in a transportation direction. The second web is formed on the mesh belt by piling up the fibers on the mesh belt. The humidifying mechanism includes an upstream-side nozzle that is provided upstream of the fiber piling-up unit in the transportation direction and supplies the humidified air to the fiber piling-up unit.

The invention relates to a press arrangement (10) for pressing a fibrous web (8), in particular packaging paper web, comprising at least two presses (11, 1) arranged one behind the other in the running direction of the fibrous web (8), specifically a first press (11) with a first press nip and a following second press (1) with a second press nip, which is an extended press nip, wherein the second press (1) is designed to be operated with a linear load of at least 500 kN / m, wherein the second press (1) is designed in such a manner that a quotient of average pressure and peak pressure in the second press nip is smaller than 0.5. The invention further relates to a corresponding pressing method, preferably using the previously described press arrangement (10).

The utility model discloses an adjustable compression roller capable of improving the dry strength of paper. The adjustable compression roller comprises a rack and a compression roller body installed on the rack. The compression roller is characterized in that compression roller textures for promoting paper fiber combination and improving fiber compactness are arranged on the outer surface of the compression roller body; an adjusting block for fixing the compression roller body and a driving source for driving the adjusting block to slide are further mounted on the rack in a sliding manner; the rack is further provided with an electromagnet for further fixing the adjusting block. The compression roller textures are arranged on the outer surface of the compression roller body, the contact area between the compression roller body and paper is increased, paper fiber combination is promoted, moisture and air in the paper can be discharged easily, the fiber compactness is improved, and therefore the strength of the paper is improved; the adjusting blocks are further fixed through magnetism generated after the electromagnets on the rack are electrified, so that multiple fixing is conveniently conducted on the pressing roller body in the production process, and the situation that the pressing roller body deviates in the production process, and then paper production is affected is prevented.

A seal strip and wear monitoring system includes: a seal strip having an upper surface; and a wear monitoring system. The wear monitoring system includes: a sensing portion comprising a plurality of electrical traces, each of the electrical traces including an uppermost portion that is generally parallel with and is positioned at a depth from the upper surface of the seal strip, wherein the depth of each trace uppermost portion differs from the depth of the other electrical traces; and a signal processing portion electrically connected with the electrical traces, the signal processing portion including circuitry configured to detect electrical signals from the traces and to determine when the uppermost portion of a trace has been damaged.

Web former for a machine for producing a fibrous web, wherein the web former comprises a double screen zone formed by guiding a loop-shaped upper screen (2) over a loop-shaped lower screen (1), and wherein the web former comprises a press-out roller (5) arranged in the upper screen (2), and wherein the press-out roller (5) has a diameter of at most 500 mm, and wherein the wrap-around angle of the press-out roller (5) by the upper screen (2), the fibrous web and the lower screen (1) is at least 25°.

A method of forming a fibrous web including the steps of providing a fiber slurry, depositing the fiber slurry between an inner forming wire and an outer forming wire, wherein the outer forming wire comprises a structured fabric and the inner forming wire contacts a segment of a forming roll, and rotating the forming roll so that the fiber slurry moves into contact with the structured fabric.

The utility model discloses a forming device capable of reducing two-side difference of kraft paper, which relates to the technical field of kraft paper processing devices and comprises a mounting frame, a mounting groove is formed in one side of the mounting frame, a friction rod is fixedly connected to the inner side of the mounting groove, two pre-pressing rollers are arranged on one side of the mounting frame, and the friction rod is fixedly connected to the inner side of the mounting groove. The mounting frame is rotationally connected with the pre-pressing roller on the lower side, a fixing rod is fixedly connected to the inner cavity wall of the pre-pressing roller, two heating pipes are fixedly connected to the outer side of the fixing rod, a movable seat is movably connected to the outer side of a friction rod, the movable seat is rotationally connected with the pre-pressing roller on the upper side, a friction sleeve is embedded in the movable seat, and a friction rod is fixedly connected to the friction sleeve. The forming device for reducing the difference between the two sides of the kraft paper page is reasonable in structural design, the pressure applied to the pre-pressing roller above the forming device can be effectively increased, so that the pre-pressing roller can stably press the kraft paper, heat generated by the heating pipe can be uniformly guided and transmitted to the pre-pressing roller, and the pre-pressing roller is uniformly heated.