Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H19/00—Changing the web roll
  • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
  • B65H19/2238—The web roll being driven by a winding mechanism of the nip or tangential drive type
  • B65H19/2253—The web roll being driven by a winding mechanism of the nip or tangential drive type and the roll being displaced during the winding operation
  • B65H19/2261—Pope-roller
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2408/00—Specific machines
  • B65H2408/20—Specific machines for handling web(s)
  • B65H2408/23—Winding machines
  • B65H2408/236—Pope-winders with first winding on an arc of circle and secondary winding along rails

Definitions

• the present invention relates to an automatic sampling device for changing the reel in machines for the production of reels of paper and other light materials in strip form.
• machines for the production of crepe paper, smooth paper and other light materials in the form of a strip, such as non-woven fabric include a device, commonly called “winder”, which makes it possible to form reels of material with a predetermined diameter and comprising a central tubular core, normally called a “rod” or “core”, on which the material is wound up during the formation phase of each coil.
• Said reel consists essentially of a motorized cylinder with a horizontal axis.
• the axis of rotation of the coil that is to say of the respective rod, is parallel to the axis of rotation of the winding cylinder.
• the rod of the latter is attached to corresponding supports mounted horizontally movable on a support structure facing the area material feed. At the end of a reel, the latter is removed and replaced by a bare rod previously rotated around its own longitudinal axis so that the peripheral speed of each surface point thereof is equal to the speed material feed.
• the main object of the present invention is to remedy the aforementioned drawback, that is to say to optimize and facilitate the change operation.
• This result has been achieved, in accordance with the present invention, by adopting the idea of producing a device having the characteristics described in claim 1.
• Other characteristics of the invention are the subject of the dependent claims. Thanks to the invention, it proves possible to control with much greater precision the path followed by the strip in the reel change phase, also making it possible to increase the production speed and without the need to submit this operation to the supervision of particularly expert or qualified personnel.
• a device according to the present invention is relatively simple to manufacture, economical and reliable even after a long period of exercise.
• FIG. 5 represents a schematic side view by transparency of the device in object, in the position of end of reel change
• Figure 6 shows the same machine as Figure 2, but with a brake for slowing the coil (5).
• a device according to the present invention can be used in the context of a machine for the production of coils of light material in the form of a strip, such as for example crepe or smooth paper.
• a motorized winding cylinder (1) mounted, with the horizontal axis, on a corresponding fixed structure (2) with which are also associated several supports or carriages (3) controlled by respective means (4) of displacement from and to the cylinder (1); said carriages (3) being intended to support a reel (5) in formation or "growth".
• the latter consists of a strip (6) of the preselected material which is wound around a respective rod (50) disposed on said supports (3) free to rotate about its longitudinal axis which is parallel to that of the cylinder (1 ).
• the means (4) for moving the supports (3) comprise a chain closed in a ring on several respective toothed rings (40) and chain to which the supports (3) are integral in correspondence with the respective base portions (30), that is to say in correspondence with the respective portions (30) opposite those (having a cradle shape with support rollers) for hooking the rods (51).
• an arm (7) for supporting a bare rod (51), that is to say a rod on which to form a new coil On each side of the cylinder (1) is provided an arm (7) for supporting a bare rod (51), that is to say a rod on which to form a new coil.
• Said arms (7) are articulated on the fixed structure (2), so as to be rotatable about the axis of the take-up cylinder (1), and are controlled by corresponding actuators (71) - to allow movement between a position substantially vertical waiting or resting (as in Figure 1) with a bare rod (51) above the cylinder (1), an inclined position
• each of the two secondary arms (70) is articulated to a corresponding primary arm (7) and has a profiled front part shaped like a cradle to receive the axis of the rod (51).
• each secondary arm (70) is slaved to an actuator (72) to control its rotation about the axis of the articulation (700) connecting with the respective primary arm (7).
• Said articulation (700) connects the upper part of each primary arm (7) with the dorsal part of the respective secondary arm (70).
• Each actuator (72) is connected, on one side, to the corresponding primary arm (7) and, on the other side, to the corresponding secondary arm (70), so as to be interposed between the two.
• said arms (7, 70) are associated with a superstructure (8) with a surface (80) which delimits, in cooperation with the surface of a bare rod (51) brought by these same arms ( 7, 70), a channel (85) (in the example, a variable section channel) along which persists an air jet produced by a battery of nozzles (9) integral with this same superstructure (8).
• the channel in question and therefore the superstructure (8) extend over the entire area concerned by the presence of the rod.
• the said surface (80) is shaped appropriately to also laterally close the channel (85) and an upper section dudi 't to channel is turned towards the coil formation zone (5), the air jet produced by the nozzles (9) being oriented in the opposite direction to lick the belly from the surface (80). In this way, there is a vacuum in the space above the bare rod
• said superstructure (8) is articulated on the two primary arms (7), with an articulation (77) whose axis is parallel to the axis of the winding cylinder (1).
• the object superstructure is controlled by two actuators (73) to and from the take-up cylinder (1).
• Each of the two actuators (73) is connected, on one side, to a dorsal appendage (78) of a corresponding primary arm (7) and, on the other side, to an appendage (79) corresponding to the superstructure ( 8).
• position (H) of figure 1 the superstructure (8) is raised, that is to say distant from the cylinder (1), so that the cradle of each secondary arm (70) is accessible and that a rod (51) can be positioned there.
• said surface (80) constitutes a lower wall of said superstructure (8), the head (81) of which is provided with an elastic and flexible appendage (82 ) which extends over a length of predetermined value towards the rod (51) situated below and is positioned in correspondence with the front section of the aforementioned channel (85).
• Said appendage (82) is advantageously connected to the head (81) of the superstructure (8) by means of an elastic seal (83) and has a blade (84) corresponding to one side directed towards the rod (51) , that is to say internal to the channel (85).
• This passage is controlled, in the initial phase, by the operator who controls the machine and is automatically interrupted when the appendage (82) comes into contact with the coil (5): this contact determines the flexion of the appendage (82 ) towards the rod (51) and, consequently, the pressure of a microswitch (800) positioned, for example, on the head (81), in a position below the seal (83).
• a microswitch 800
• the impact of the appendage (82) on the surface of the coil (5) will be appropriately mitigated by the elasticity of the link (83).
• the device also advantageously comprises a second battery of nozzles (100) disposed integrally with the structure (2), in the space between the cylinder (1) and the area occupied by the coil (5), in position at below the path followed by the strip (6).
• the nozzles of the second battery (100) are positioned on the opposite side to the nozzles belonging to the first battery (9) relative to the path of the material (6) in the space between the cylinder (1) and the coil (5).
• the nozzles of the second battery (100) are intended to produce a corresponding compressed air jet on the belly of the material (6), downstream of the winding cylinder (1) as described later and better below.
• the device in question can also be provided with a brake (500) to cause, on command, the slowing down of the coil (5) during the change phase.
• said brake (500) can be of the shoe type, with the shoes (550) intended to act on the two ends of the rod (50) and supported by respective supports (555) movable horizontally like the supports (3) of the coil (5) and, like these, connected to the lateral casings (200) of the structure (2).
• each of the aforementioned supports (3) may be provided on the internal side of the respective side casing (200) of the structure (2), the supports (555) of the brake (500) being on the external sides of the side casings, c that is to say independent of the supports (3).
• the operation of the device during the reel change, that is to say when the reel (5) has reached the desired dimensions, is as follows.
• the nozzles of the second battery (100) produce an air jet which inflates under the strip of paper (6) by directing it towards the superstructure (8). And, under the effect of the depression generated by the jet produced by the nozzles (9), the material is sucked towards the channel (85), that is to say in the space between the surface (80) and the rod (51).
• the material is interrupted, which is why one end follows the coil (5) finished in the removal phase, while the other end is pushed, by the current produced by the nozzles (9), to the inside the channel (85) and follows the profile of the surface (80) which directs it towards the point of contact between the rod (51) in rotation and the cylinder (1), in the jargon called "nip", and so s 'then wraps around the same rod (51).
• the reel change is carried out, since the finished reel (5) is in the removal phase and a new reel begins to form on the rod (51).
• the movements and commands of the various elements can be managed automatically by means of a programmable electronic central unit, of the type known for industrial automation technicians and, therefore, not described in detail.

Landscapes

• Winding Of Webs (AREA)
• Replacement Of Web Rolls (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34640349

Family Applications (1)

Country Status (4)

Families Citing this family (8)

Family Cites Families (7)

• 2003
  • 2003-12-01 IT IT000302A patent/ITFI20030302A1/it unknown
• 2004
  • 2004-11-25 WO PCT/IT2004/000649 patent/WO2005054102A1/fr not_active Application Discontinuation
  • 2004-11-25 EP EP04819740A patent/EP1697244A1/de not_active Withdrawn
• 2005
  • 2005-07-11 US US11/182,180 patent/US7128289B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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