Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
  • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
  • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
  • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
  • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
  • B29B7/421—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with screw and additionally other mixing elements on the same shaft, e.g. paddles, discs, bearings, rotor blades of the Banbury type
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
  • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
  • B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
  • B01F27/724—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with a single helix closely surrounded by a casing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
  • B01F27/05—Stirrers
  • B01F27/11—Stirrers characterised by the configuration of the stirrers
  • B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
  • B01F27/1143—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections screw-shaped, e.g. worms
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
  • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
  • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
  • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
  • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
  • B29B7/422—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with screw sections co-operating, e.g. intermeshing, with elements on the wall of the surrounding casing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
  • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
  • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
  • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
  • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
  • B29B7/422—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with screw sections co-operating, e.g. intermeshing, with elements on the wall of the surrounding casing
  • B29B7/423—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with screw sections co-operating, e.g. intermeshing, with elements on the wall of the surrounding casing and oscillating axially
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
  • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
  • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
  • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
  • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
  • B29B7/425—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with screw surrounded by a casing provided with grooves or cavities
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
  • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
  • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
  • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
  • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
  • B29B7/426—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with consecutive casings or screws, e.g. for charging, discharging, mixing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
  • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
  • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
  • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
  • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
  • B29B7/428—Parts or accessories, e.g. casings, feeding or discharging means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
  • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
  • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
  • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
  • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
  • B29B7/428—Parts or accessories, e.g. casings, feeding or discharging means
  • B29B7/429—Screws
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
  • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
  • B29B7/52—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders
  • B29B7/523—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders co-operating with casings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
  • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
  • B29C48/45—Axially movable screws
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
  • B29C48/50—Details of extruders
  • B29C48/505—Screws
  • B29C48/565—Screws having projections other than the thread, e.g. pins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
  • B29C48/50—Details of extruders
  • B29C48/68—Barrels or cylinders
  • B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
  • B29C48/687—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having projections with a short length in the barrel direction, e.g. pins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
  • B01F2101/2805—Mixing plastics, polymer material ingredients, monomers or oligomers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F2215/00—Auxiliary or complementary information in relation with mixing
  • B01F2215/04—Technical information in relation with mixing
  • B01F2215/0413—Numerical information
  • B01F2215/0418—Geometrical information
  • B01F2215/0422—Numerical values of angles

Definitions

• the present invention relates to a worm shaft for a mixing and kneading machine, in particular for continuous treatment processes, a corresponding worm shaft section, a housing comprising such a worm shaft or such a worm shaft section and a mixing and kneading machine comprising such a housing for continuous treatment processes.
• Such mixing and kneading machines with such screw shafts are used in particular for the preparation of plastic and / or pasty masses. For example, they serve the processing of viscoplastic masses, the homogenization and plasticization of plastics, rubber and the like, the incorporation of fillers and reinforcing materials and the production of raw materials for the food industry.
• the worm shaft in this case forms the working member which transports or conveys the material to be processed forward in the axial direction, thereby mixing the components of the material with one another.
• Such mixing and kneading machines are also particularly suitable for the production of polymer granules, polymer extruded profiles, polymer moldings and the like.
• a homogeneous polymer melt is produced in the mixing and kneading machine, which is then conveyed, for example, into a discharge device and from this to, for example, a granulation device, a shaft, a conveyor belt or the like.
• Such mixing and kneading machines are known for example from CH 278 575 A and from CH 464 656 known.
• the worm shaft preferably not only performs a rotary movement, but at the same time also translates back and forth in the axial direction, ie in the longitudinal direction of the worm shaft.
• the sequence of movements is therefore preferably distinguished by the fact that the worm shaft - as seen in the axial direction - executes an oscillatory motion superimposed on the rotation. This movement allows the introduction of internals, namely kneading elements, such as kneading bolts or kneading teeth, in the housing of the mixing and kneading machine.
• the worm arranged on the main shaft does not run continuously, viewed in cross-section with the shaft bar, but is subdivided into a plurality of individual wing elements each extending over a certain angle section of the cross-sectional circumference of the shaft rod. Adjacent wing elements are spaced from each other both in the axial direction and in the outer circumferential direction of the shaft rod, ie, a gap is provided between adjacent wing elements, both in the axial direction and in the outer circumferential direction of the shaft rod.
• the entire shaft rod of the worm shaft or an axial section of the shaft rod of the worm shaft, seen in cross section of the shaft rod comprises three vane elements each extending over an angular section of, for example, 100 ° of the cross-sectional circumference of the shaft rod, this is called a three-flighted worm shaft of a three-flighted worm shaft section, if this wing element arrangement does not extend over the entire axial length of the shaft rod, but only over a portion thereof.
• the rotation and the translational movement of the worm shaft in the axial direction are controlled so that the individual wing elements in the rotation and the translational movement with their flanks in the vicinity of the corresponding kneading elements to compress the material to be mixed and kneading and a shearing action this exercise so as to promote the mixing and / or kneading without the kneading elements collide with the wing elements. Furthermore, because they approach the flanks of the wing elements during rotation and translational movement of the worm shaft, the kneading elements prevent deposits of components of the mixture from forming on the flanks of the wing elements, so that the kneading elements result in cleaning of the wing elements as a result.
• the number and geometry of the wing elements must be adapted to the number of kneading elements.
• the individual kneading elements are arranged on the inner peripheral surface of the housing of the mixing and kneading machine in the axial direction in a plurality of axially spaced-apart kneading elements adapted to the geometry and number of the wing elements and extending over at least one axial section of the inner circumferential surface of the housing ,
• the individual kneading elements are screwed into bores or receptacles provided in the inner wall of the housing.
• the wing elements of known worm shafts are designed symmetrically, ie the three wing elements of a dreiflügligen worm shaft each have the same shape and the same dimensions and are evenly distributed on the peripheral surface of the shaft rod, so that the centers of the three wing elements offset by 120 ° on the Circumferential surface of the shaft rod are arranged. In adaptation to it are arranged on the inner peripheral surface of the housing of the mixing and kneading three offset by 120 ° rows of receptacles for kneading.
• the centers of the four wing elements are each offset by 90 ° on the peripheral surface of the shaft rod and are arranged on the inner peripheral surface of the housing of the mixing and kneading machine four offset by 90 ° rows of receptacles for kneading.
• a mixing and kneading machine comprises an intake section located at the upstream end, in which the components to be mixed or kneaded are introduced into the machine, a melting section adjoining them downstream, in which the Components are melted, a mixing and dispersing, in which any aggregates of the components of the material are comminuted and mixed as homogeneously as possible, and a degassing section, in which the mixture is degassed.
• the worm shaft of a mixing and kneading machine in sections three-winged and partially four-winged and to equip the housing shells of the corresponding sections of the housing inner wall of the mixing and kneading machine with three or four rows of receptacles for kneading elements. If the mixing and kneading machine thus optimized for the raw materials to be mixed is to be used for another application with different starting materials, the mixing and kneading machine must be re-optimized with respect to the processing zones and converted accordingly.
• a three-flighted worm shaft section is to be used in a process section in which a four-flighted worm shaft section and a housing shell equipped with four kneading studs were previously used, the housing shell equipped with four rows of studs for kneading studs offset by 90.degree 120 ° staggered rows of shots for kneading bolts equipped Housing shell to be replaced.
• it is complicated in the prior art to convert a mixing and kneading machine in adaptation to another source material to be mixed, in particular as regards the number of rows of kneading elements and the corresponding number of wing elements on the worm shaft.
• known three- and administratflüglige screw shafts or screw shaft sections require special equipment of the corresponding housing sections with recordings for kneading.
• Object of the present invention is therefore to overcome the aforementioned disadvantages and to provide a dreiflüglige worm shaft or a dreiflügligen auger shaft section, or in particular in housings or housing sections can be used, which - at least - with other worm shaft sections, in particular administratflügligen Schneckenwellenabêten, is compatible, so that in a mixing and kneading a four-flighted worm or a selfishflügliger auger shaft section can be exchanged for the three-bladed worm shaft or the three-bladed worm shaft section, without the replacement of the housing or housing shells is necessary, but at most a part The kneading pin must be repositioned from one row of shots to another row.
• a worm shaft for a mixing and kneading machine in particular for continuous treatment processes, comprising a shaft rod, spaced on its peripheral surface, extending from the peripheral surface of the shaft rod outwardly extending wing elements, wherein the wing elements on the peripheral surface of the Shaft rod, at least in a section extending in the axial direction of the worm shaft, are arranged in three rows extending in the axial direction of the worm shaft, wherein at least one of the blade elements of one of the rows is different from one of the blade elements of one of the other rows and / or the rows of wing elements, in Cross-section of the shaft rod, unevenly distributed over the defined by the outer peripheral surface of the shaft rod.
• the present invention relates to an at least partially asymmetric three-flighted worm shaft.
• the worm shaft according to the invention is configured asymmetrically at least in sections, it can also be used in a housing of a mixing and kneading machine which is compatible with other worm shaft sections, in particular with four-flighted worm shaft sections. Therefore, the present invention asymmetrically dreiflüglig configured section of the worm shaft can replace a four-wing configured worm shaft section without an exchange of the housing or housing shells is necessary.
• the worm shaft configured in accordance with the invention at least in sections asymmetrically in a trihedron shape allows it to be inserted in housings whose receptacles for kneading elements, viewed in the cross section of the housing at least in a section extending in the axial direction of the housing, extend over the inner peripheral surface of the housing Housing or the housing shell defined extent are distributed unevenly.
• An uneven distribution of the receptacles for kneading elements over the circumference defined by the inner circumference of the housing circumference is understood that - viewed in the cross section of the housing - at least two distances from each other for all distances between two receptacles for kneading elements of adjacent rows on the inner peripheral surface of the housing are.
• a cavity for kneading elements is considered to be a cavity on the inner peripheral surface of the housing, which is designed such that a kneading element, that is a kneading pin, a kneading tooth or the like, can be arranged therein and fastened by it, so that the kneading element extends from the inner peripheral surface of the housing radially inwardly into the hollow interior.
• the receptacle can be a recess, recess, bore or the like, which extends more or less deeply from the inner circumferential surface of the housing into the housing.
• At least one of the receptacles is a recess, recess or bore and are preferably each of the receptacles a recess, recess or bore.
• the receptacle extends from the inner peripheral surface of the housing shell into the latter and possibly also into the outer housing and optionally through the outer housing.
• the receptacle thus extends into and possibly through the inner circumferential surface of the housing.
• the worm shaft has on the peripheral surface of the shaft rod outwardly extending wing members which are arranged on the circumferential surface of the shaft rod, at least in a section extending in the axial direction of the worm shaft, in three rows extending in the axial direction of the worm shaft.
• This dreiflüglige Section comprises - except the arranged in the three rows wing elements - no other wing elements, so not individual, arranged between these rows wing elements.
• a row of wing elements extending in the axial direction of the worm shaft over at least a portion of the (outer) circumferential surface of the shaft rod in the sense of the present invention is understood to mean that a connecting line laid over the midpoints of one another in the axial direction of a row at least in the Substantially is a straight line, wherein the maximum deviation of the connecting line from a straight line is less than 10 °, preferably less than 5 ° and more preferably less than 2 °.
• the center point of a wing element is understood to be the point which lies in the middle of the length of the outer peripheral surface of the wing element, wherein the length is the longest extent or longitudinal extension of the outer peripheral surface of the wing element, ie the longest possible straight line between two different points on the outer peripheral surface of the wing wing element.
• the wing members are arranged on the peripheral surface of the shaft rod at least in a section extending in the axial direction of the worm shaft, in three rows.
• the other axial sections of the worm shaft may be configured differently, namely, for example, two-winged, aleflüglig or alternately two- and administratflüglig.
• the worm shaft according to the present invention can also comprise two, three or more three-winged sections, which are separated from each other by one or more other sections, wherein these one or more other sections can in turn be configured two-winged, four-winged or alternately two- and four-winged.
• At least one of the wing members of one of the rows is different from one of the wing members of one of the other rows, and / or the rows of wing members are distributed across the one defined by the outer peripheral surface of the shaft rod Uneven circumference.
• At least one of the wing members of one of the rows of the at least one section extending in the axial direction of the worm shaft is shorter and / or narrower than at least one other of the wing members of one of the other two series.
• the dimensions of the wing members of different rows differ from each other with respect to the length and / or width of the wing members.
• the length of the outer peripheral surface of a wing member in this context as stated above, the longest straight extension of the outer peripheral surface of the wing member.
• the width B of the outer peripheral surface of a wing member in this connection is the longest straight extension of the outer peripheral surface of the wing member, which extends perpendicular to the length of the wing member.
• the individual wings can have the same or a different shape.
• all wing members may have a biconvex outer peripheral surface, the length of wing members of one row being longer than that of another row.
• the wing members may differ in shape, that is, the wing members of one row have a biconvex outer peripheral surface and the wing members of another row have a parallelogram outer peripheral surface, the width of wing members of one row being greater than that of another row.
• the angular distance between the centers M of the outer peripheral surfaces of the wing members on the peripheral surface of the shaft bar of adjacent rows between at least two of the three rows differs from the angular distance between at least two other rows.
• the wing elements of all three rows can therefore the same shape as well as the same Have dimensions, provided that the rows of wing elements, seen in cross-section of the shaft rod, unevenly distributed over the defined by the outer peripheral surface of the shaft rod extent.
• the wing members of all three rows may have a different shape.
• At least one of the wings of one of the rows of the at least one portion extending in the axial direction of the worm shaft is shorter and / or narrower than at least one of the wing members of one of the other two rows, and the angular spacing is different between the midpoints M of the outer peripheral surfaces of the wing members on the peripheral surface of the shaft rod of adjacent rows between at least two of the three rows of the angular distance between at least two other rows.
• the wing members of all three rows may have the same shape or a different shape.
• the shaft rod of the worm shaft according to the invention preferably has a circular cross-section, with the individual wing elements extending radially outward from the peripheral surface of the shaft rod.
• the present invention is not limited in the manner of manufacturing the worm shaft.
• the worm shaft can be made by milling a metal cylinder to form the wing members, or by welding wing members to a shaft rod.
• the worm shaft is made by placing individual worm shaft sections on a base bar, with each worm shaft section comprising, for example, two rows of each 1 to 4 adjacent wing elements.
• At least 80%, preferably at least 90%, particularly preferably at least 95%, more preferably at least 99% and most preferably all wing elements of each row of the at least one extending in the axial direction of the screw shaft portion are each equal to each other.
• all wing members of the first row each have the same shape and dimensions as the same length and the same width.
• all of the second row wing members are each of the same shape and dimensions, and each of the third row wing members has the same shape and dimensions, with the wings differing between at least two of the three rows and / or the rows of wing members being in the Cross-section of the shaft rod, unevenly distributed over the defined by the outer peripheral surface of the shaft rod.
• the length of the section of the worm shaft extending in the axial direction, in which the wing elements are arranged in three rows extending in the axial direction of the worm shaft is at least 0.2 D (ie at least over a distance corresponding to 20% of the diameter). , preferably at least 5 D (ie at least over a distance corresponding to 5 times the diameter), more preferably at least 10 D (ie at least over a distance corresponding to 10 times the diameter) and most preferably at least 25 D (ie at least over a D) 25 times the diameter corresponding distance) of the length of the worm shaft.
• the wing members of the individual rows are oriented so that their longitudinal extent on the circumferential surface of the shaft rod extends perpendicular to the longitudinal direction of the worm shaft or at a comparatively small angle to the vertical of the longitudinal direction of the worm shaft.
• each of the wing members of the at least one portion extending in the axial direction of the worm shaft has a longitudinal extent which extends at an angle of 45 ° to 135 °, preferably from 60 ° to 120 °, more preferably from 70 ° to 1 10 ° and most preferably i) from 75 ° to 85 ° or ii) from 95 ° to 105 ° or iii) from more than 85 ° to less than 95 °, such as 90 °, to the axial direction of the worm shaft.
• at least 50%, alternatively at least 80%, and alternatively at least 90% of the wing members are oriented.
• each of the wing elements of the at least one section extending in the axial direction of the worm shaft has an outer peripheral surface in plan view of a shape selected from the group consisting of parallelogram-shaped, elliptical, oval, biconvex, modified elliptical, modified oval, modified biconvex and modified rectangular.
• each of the two lateral flanks can each have a straight section or one of the two lateral flanks can have a straight section or neither of the two lateral flanks can have a straight section.
• modified rectangular means that the outer peripheral surface of the wing elements, in plan view, has a central rectangular portion, seen at the two, viewed in the longitudinal extension of the wing members, each end an end portion in the form of a tapered to the ends of the trapezoid or triangle, preferably isosceles Trapezes or triangles, is provided.
• the wing members of different rows do not have the same shape, so that for example the wing members of the first row and the wing members of the third row have a biconvex outer peripheral surface, whereas the Flugelemia the second row have a parallelogram-shaped outer peripheral surface.
• At least 50%, alternatively at least 80%, and alternatively at least 90% of the wing elements have an outer circumferential surface shape set out above or only the wing elements of a row or the Wing members of two rows have suchgrodes vomform.
• all the wing members of a row each have the same shape, wherein the shape of the wing members of two of the three rows is the same and different from the shape of the wing members of the third row.
• all wing elements of all three rows each have the same shape, but the wing elements of at least one row differ from those of another row in their length and / or width.
• good results are achieved when each of the wing members of the at least one section extending in the axial direction of the worm shaft has, in plan view, a biconvex modified biconvex or parallelogram outer peripheral surface, the shape of the wing members of the different rows being different.
• the wing members of the first and third rows may have a parallelogram-shaped outer peripheral surface, whereas the wing members of the second series have a modified biconvex outer peripheral surface whose lateral flanks each have a straight portion.
• the wing members of all of the three rows may have a modified biconvex outer peripheral surface, one of the two lateral flanks or both of the two lateral flanks having a straight portion, the wing members of the first and third rows being wider than the wing members of the second row.
• the ratio of length to width of each of the wing elements of all three rows 1 to 30, preferably 2 to 20, more preferably 5 to 15 and most preferably 6 to 9 or 10 to 12, wherein the length L is the longest straight extension of the outer peripheral surface of the vane member and the width B is the longest straight extension of the outer peripheral surface of the vane member extending perpendicular to the length L of the vane member.
• the ratios of length to width of the wing elements of different rows may differ from each other.
• the ratio of length L to width B of each of the wing members of two of the three rows may be the same and may differ from the ratio of length L to width B of the wing members of the third row.
• the wing members of two of the three rows of the at least one portion extending in the axial direction of the worm shaft are equal to each other and the wing members of the third row have the same shape as the wing members of the other rows, but by 1 to 25 %, preferably 2 to 20%, more preferably 5 to 15% longer or shorter than the wing elements of the other row.
• the wing members of two of the three rows of the at least one portion extending in the axial direction of the worm shaft are equal to each other and the third row wing members have a different shape than the wing members of the other row the wing members of the other row are 1 to 25%, preferably 2 to 20%, more preferably 5 to 15% longer or shorter than the wing members of the other two rows.
• the wing members of two of the three rows of the at least one extending in the axial direction of the worm shaft portion be equal to each other and the wing members of the third row have the same shape as the wing members of the other rows, but by 1 to 25%, preferably 2 to 20%, more preferably 5 to 15% wider or narrower than the wing members of the other rows.
• the wing members of two of the three rows of the at least one extending in the axial direction of the worm shaft portion are equal to each other and the wing members of the third row have a different shape as the wing members of the other row, wherein the wing elements of the another row by 1 to 25%, preferably 2 to 20%, more preferably 5 to 15% wider or narrower than the wing elements of the other two rows.
• the wing members of two of the three rows of the at least one section extending in the axial direction of the worm shaft are equal or different and the angular distance between the centers M of the outer peripheral surfaces of the wing members of the distinguishes two rows on the peripheral surface of the shaft rod from the angular intervals between the center M of the outer peripheral surfaces of the other row and each of the centers M of the outer circumferential surfaces of the two rows on the peripheral surface of the shaft rod.
• the lengths and / or the widths and / or the ratios of length to width of the wing elements of the three rows may be the same or different.
• the wing members of the third row may have the same or a different shape than the wing members of the other rows.
• each of the wing members of two of the three rows of the at least one section extending in the axial direction of the worm shaft, viewed in cross-section of the shaft rod, extends over the same angular distance of the peripheral surface of the shaft rod and each of the wing members of the other row extends over a shorter one or longer angle portion, wherein the difference between the angular intervals is preferably 1 to 20% and more preferably 5 to 15%.
• the present invention is not limited with respect to the formation of the flanks of the wing elements of the at least one two-winged section of the worm shaft.
• the lateral flanks of the wing members may therefore extend vertically upward from the circumferential direction of the shaft rod to the outer peripheral surface of the wing members.
• the side flanks of the wing members do not extend vertically upward from the circumferential direction of the shaft rod to the outer peripheral surface of the wing members, but angled.
• the lateral flanks of each of the wing elements of the at least one three-winged section of the worm shaft at an angle of 1 ° to 60 °, preferably from 2 ° to 40 °, particularly preferably from 3 ° to 20 ° and most preferably from 4 ° to 10 ° relative to the cross-sectional plane of the shaft rod extending upward to the outer peripheral surface of the wing elements.
• the lateral flanks of each of the wing elements of the at least one three-winged section of the worm shaft at an angle of 1 ° to 60 °, preferably from 2 ° to 40 °, particularly preferably from 3 ° to 20 ° and most preferably from 4 ° to 10 ° relative to the cross-sectional plane of the shaft rod extending upward to the outer peripheral surface of the wing elements.
• not all, but at least 50%, preferably at least 80% and more preferably at least 90% of all wing members may have flanks extending outwardly from the peripheral surface of the shaft rod at the afores
• Another object of the present invention is a section for a worm shaft, having a shaft rod with a circular cross section, wherein on the peripheral surface of the shaft rod spaced apart, are arranged from the peripheral surface of the shaft rod outwardly extending wing elements, wherein the wing elements on the peripheral surface of Shaft bar are arranged in three rows extending in the axial direction of the worm shaft, wherein at least one of the wing elements of one of the rows of one of the wing elements of one of the other Rows are different and / or the rows of wing members, viewed in cross-section of the shaft rod, unevenly distributed over the circumference defined by the outer peripheral surface of the shaft rod, and wherein each row preferably comprises one, two, three or four axially spaced wing members.
• the present invention relates to a housing of a mixing and kneading machine for continuous treatment processes, wherein in the housing, a hollow interior is formed in which extend at least partially in the axial direction of a previously described screw shaft or one or more sections described for a worm shaft, and wherein receptacles for kneading elements extending at least in sections are arranged on the inner circumferential surface of the housing, wherein the receptacles are arranged on the inner peripheral surface of the housing in at least three rows extending in the axial direction over at least a portion of the inner circumferential surface of the housing.
• the receptacles on the inner peripheral surface of the housing are in two, three, four or six, preferably three, four or six, more preferably four or six and most preferably six in the axial direction over at least a portion of the inner circumferential surface of the housing arranged extending rows.
• the rows of receptacles for kneading elements are distributed unevenly over the inner peripheral surface of the housing.
• the inner peripheral surface of the housing is circular in cross-section and at least one of the angular distances seen in the cross-section of the housing between at least two receptacles of adjacent rows on the inner peripheral surface of the housing to the value of 360 n 1 °, preferably by at least 2.5 °, more preferably by at least 5 ° and most preferably by at least 10 ° deviates and preferably all angular distances between each two images of adjacent rows against the value of 360 n by at least 1 °, preferably at least 2.5 °, more preferably by at least 5 ° and most preferably by at least 10 °, where n is the number of rows of shots.
• Another object of the present invention is a mixing and kneading machine for continuous treatment processes, which comprises a previously described housing.
• the continuous preparation process may involve the production of polymer granules (eg, soft PVC, rigid PVC, PVC blends, chlorinated PVC or Wood-Plastic Composites (WPC)), polymer extrusions, or polymer moldings to produce the polymer granules
• WPC Wood-Plastic Composites
• Preparation of cable compounds the production of coatings (such as powder coatings, toners, duoplastics, etc.), the calendering (such as PVC, PP, PET, TPE), the production of viscous food (such as chewing gum), the production of anode materials and other applications act.
• Fig. 1a shows a schematic longitudinal section of a mixing and kneading machine according to the invention
• Fig. 1b shows a perspective view of the housing of the mixing and kneading machine shown in Fig. 1a;
• Fig. 2a is a perspective view of an axial portion of a
• a worm shaft according to an embodiment of the present invention shows a plan view of the axial section of the worm shaft shown in Figure 2a; shows a side elevational view of the axial portion of the worm shaft shown in Fig. 2a; a perspective view of an axial portion of a worm shaft according to another embodiment of the present invention; shows a plan view of the axial section of the worm shaft shown in FIG.
• FIG. 3a a perspective view of an axial portion of a worm shaft according to another embodiment of the present invention; shows a plan view of the axial section of the worm shaft shown in Figure 4a; the development of the lateral surface of the shaft rod of an axial section of the worm shaft with thereon arranged vane elements and in the gaps between the vane elements protruding kneading elements according to another embodiment of the present invention; the development of the lateral surface of the shaft rod of an axial portion of a worm shaft with thereon arranged vane elements and projecting into the gaps between the vane elements kneading elements according to another embodiment of the present invention and
• the mixing and kneading machine shown in FIGS. 1 a and 1 b and designated as a whole by 100 comprises a housing 10 and one in the housing 10 arranged worm shaft 12.
• the housing 10 comprises two housing halves 14, 14 ', which are lined inside with a so-called housing shell 16.
• the housing shell 16 is considered in the present patent application as part of the housing 10.
• the inner peripheral surface of the housing 10, when the two housing halves 14, 14 'are closed, defines a cylindrical hollow interior 18, that is to say an interior 18 with a circular cross-section.
• the worm shaft 12 comprises a shaft rod 20, on whose peripheral surface wing elements 22 are arranged, which extend on the peripheral surface of the shaft rod 20 radially outward, wherein the individual wing elements 22 are spaced from each other.
• receptacles 28 for kneading elements 24, that is for kneading, Knetzähne and the like provided.
• Each of the receptacles 28 is a bore 28 which extends from the inner peripheral surface of the housing shell 16 through the housing wall.
• the lower, radially inner end of each receptacle 28 may be configured, for example, square in cross-section.
• Each kneading pin 24 can then have, for example, at its lower end a matching fit in the square-shaped radially inner end of the receptacles 28 matching end and is thus fixed against rotation in the receptacle 28 in the inserted state.
• the kneading pin 24 is connected at its lying in the receptacle 28 end with an inserted into the overlying end of the receptacle 28 fixing member (not shown) by screwing.
• the kneading pin 24 may also have an internal thread for a screw and fixed with a screw instead of the fixing element and the nut. As can be seen in particular from FIG.
• the receptacles 28, each equally spaced apart, for the kneading bolts 24 extend in each of the two housing halves 14, 14 ', viewed in the axial direction, in the form of three rows 29, 29', 29 ".
• the total number of rows of receptacles 29, 29 ', 29 "of the housing is six.
• each method section 34, 34 ', 34 is adapted to the function of the individual method sections 34, 34', 34" with regard to the number of kneading pins 24 and the number and extent of the wing elements 22 on the shaft rod 20.
• the starting material to be mixed is d he fed mixing and kneading machine 100 via the hopper 36, then passed through the process sections 34, 34 ', 34 "and finally discharged via the outlet opening 38.
• the mixing and kneading machine 100 can also have more process sections, in particular also four process sections, or fewer process sections, such as two or one process section.
• the worm shaft 12 for a mixing and kneading machine is designed so that the wing elements 22 on the peripheral surface of the shaft rod 20, at least in a section extending in the axial direction of the worm shaft 12, as in FIG. 1 b shown in the axial direction of the Worm shaft 12 extending rows are arranged, so the worm shaft 12 is partially configured dreiflüglig, and at least one of the wings of one of the rows of one of the wing elements of one of the other rows is different and / or the rows of wing elements, seen in cross section of the shaft bar over distribute unevenly the circumference defined by the outer peripheral surface of the shaft bar.
• FIGs 2a, 2b and 2c such a three-winged section of a worm shaft 12 according to a preferred embodiment of the present invention is shown.
• vane elements 22, 22 ', 22 ", 22"', 22 iv , 22 v arranged, which extend from the peripheral surface of the shaft rod 20 radially outward.
• the individual wing elements 22, 22 ', 22 ", 22"', 22 iv , 22 v are designed so that they have, in plan view, modified biconvex outer circumferential surfaces in which the two, seen in the longitudinal extension of the wing elements, ends of the outer peripheral surfaces are formed in the shape of an edge and in each case one flank of the two opposite end portions have a straight portion 39, 39 '.
• the longitudinal extents L of the wing elements 22, 22 ', 22 ", 22"', 22 iv , 22 v extend almost perpendicular to the longitudinal direction of the worm shaft 12.
• the ratio of the length L to the width B of the individual wing elements 22, 22 ', 22 “, 22"', 22 iv , 22 v is about 8.5, the width B being the longest straight extension of the outer peripheral surface of the wing element 22, 22 ', 22 ", 22"', 22 iv , 22 v , which extends perpendicular to the length L of the wing element 22, 22 ', 22 ", 22"', 22 iv , 22 v .
• An axially extending row 40 of wing elements 22, 22 ', 22 ", 22"', 22 IV, 22 V is present according to the present invention, if - as in the embodiment shown in Figures 2a, 2b and 2c embodiment - an over the center points M of the outer circumferential surface of connecting lines which are spaced apart from each other in the axial direction in the axial direction 22, 22 'is a straight line.
• the center M of a wing element 22, 22 ' is the point which lies in the middle of the length L of the wing element 22, 22'.
• the ratio of the axial distance A of the adjacent vane elements 22, 22 'of the row 40 is about 5.5 in each case.
• the width B of the wing element is as defined above and the axial distance A between two axially adjacent wing elements 22, 22 'is the distance between the centers M of the outer peripheral surfaces of the axially adjacent wing elements 22, 22'.
• the rows distribute 40 of the wing members 22, 22 ', 22 “, 22"', 22 IV, 22 V, as seen in cross-section of the shaft rod 20, over the area defined by the outer circumferential surface of the shaft rod 20 circumference thereof uneven.
• the angular distance ⁇ of the centers M between the vane elements 22 "', 22' v on the peripheral surface of the shaft rod 20 is 135 °
• the angular distances ß of the midpoints M between the vane elements 22, 22 '' and 22, 22 ' v on the peripheral surface of the shaft rod 20 are each 1 12.5 °.
• FIG. 3a and 3b there is shown a trifoliate section of a worm shaft 12 in accordance with another preferred embodiment of the present invention.
• the outer peripheral surfaces of the wing members 22, 22 ' are as in the Embodiment of Figures 2a, 2b and 2c modified biconvex configured, whereas the outer peripheral surfaces of the wing members 22 ", 22"', 22 iv , 22 v of the other two rows have a different, also modified biconvex shape, wherein the outer peripheral surfaces of the wing members 22 ", 22 "', 22 iv , 22 v, however, are wider than those of the wing elements 22, 22' and in the case of the wing elements 22", 22 "', 22 iv , 22 v, the two equal ends of the lateral flanks have a straight 39, 39' section respectively.
• FIGS. 4a and 4b show a trihedron portion of a worm shaft 12 according to another preferred embodiment of the present invention.
• the outer circumferential surfaces of the wing members 22, 22 'as shown in the embodiment of Figures 2a, 2b and 2c modified biconvex configured, whereas the outer circumferential surfaces of the wing members 22 ", 22"', 22 IV, 22 V of the other two rows of a different, also modified
• the outer peripheral surfaces of the wing members 22 ", 22"', 22 iv , 22 v are wider than that of the wing members 22, 22'
• the end portions of the outer peripheral surfaces of the wing members 22 ", 22"', 22 iv , 22nd v in the form of a respective tapered to the ends trapezoid are configured and in the wing elements 22 ", 22"', 22 iv , 22 v, the two opposite ends of the lateral flanks have a straight portion 39, 39'.
• FIG. 5 shows the unwinding of the lateral surface of a shaft rod 20 of an axial section of a worm shaft 12 with wing elements 22, 22 ', 22 ", 22"', 22 iv , 22 v arranged thereon and into the gaps between the wing elements 22, 22 '. , 22 ", 22"', 22 iv, v 22 protruding kneading members 24 are shown according to an embodiment of the present invention.
• the worm shaft 12 rotates and at the same time moves once per revolution in an axial translational way back and forth.
• the kneading elements 24 move back and forth along the lateral flanks of the wing elements 22, 22 ', 22 ", 22"', 22 iv , 22 v and also move in the gap between adjacent in the circumferential direction of the shaft rod 20 Klielelementen 22, 22 "or 22", 22'v back and forth.
• the outer peripheral surfaces of the wing members 22, 22 ', 22 ", 22"', 22 iv , 22 v are each parallelogram-shaped, but the four wing members 22, 22 ', 22 iv , 22 v are longer and wider than the two wing members 22 ", 22"'.
• FIG. 6 shows an alternative embodiment to that shown in FIG.
• wing elements 22, 22 ', 22 ", 22"', 22 iv , 22 v also formed parallelogram-shaped, but the four wing elements 22, 22 ', 22 iv , 22 v shorter and wider than the two wing elements 22 ", 22"'.
• Wing elements on the peripheral surface of the shaft rod ß angular distance between the centers of two
• Length longest straight extension of the outer peripheral surface of the wing element

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Chemical & Material Sciences (AREA)
• Mixers Of The Rotary Stirring Type (AREA)
• Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
• Extrusion Moulding Of Plastics Or The Like (AREA)
• Glanulating (AREA)
• Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
• Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
• Accessories For Mixers (AREA)
• Manufacturing And Processing Devices For Dough (AREA)
• Food-Manufacturing Devices (AREA)

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