EP0304790A1 - Falzmaschine - Google Patents

Falzmaschine Download PDF

Info

Publication number
EP0304790A1
EP0304790A1 EP19880113345 EP88113345A EP0304790A1 EP 0304790 A1 EP0304790 A1 EP 0304790A1 EP 19880113345 EP19880113345 EP 19880113345 EP 88113345 A EP88113345 A EP 88113345A EP 0304790 A1 EP0304790 A1 EP 0304790A1
Authority
EP
European Patent Office
Prior art keywords
folding machine
machine according
stone
knife roller
bench
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19880113345
Other languages
German (de)
English (en)
French (fr)
Inventor
Erich Gabelmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TURNER MASCHINENBAU GMBH
Original Assignee
Turner Maschinenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Turner Maschinenbau GmbH filed Critical Turner Maschinenbau GmbH
Publication of EP0304790A1 publication Critical patent/EP0304790A1/de
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B17/00—Details of apparatus or machines for manufacturing or treating skins, hides, leather, or furs
    • C14B17/14—Auxiliary devices for leather-working machines, e.g. grinding devices for blading cylinders or dust-removal devices combined with the working machines

Definitions

  • the invention relates to a folding machine with a knife roller, a support roller thus forming a nip and a grinding element which can be moved back and forth along the knife roller for grinding the knives of the knife roller.
  • Such a folding machine is known, for example, from the "RASANTA 730" brochure from Maschinenfabrik Moenus-Turner GmbH.
  • the knives of the knife roller are ground by a motor-driven, rotating grinding wheel. Since the grinding unit is relatively heavy, you need a very stable traverse to guide it during the back and forth movement. The grinding effect is limited to a line-like contact across the width of the grinding wheel of approximately 30 mm. Grinding takes place in the breaks between the folding operations. Because when folding, the knife roller is bent slightly and would lose its exact shape if the rectilinear grinding wheel touches the knives.
  • the invention is based, to simplify the grinding device in a folding machine of the type described in the task.
  • the grinding element is a bench stone which is guided on a path approximately radial to the knife roller and can be pressed against the knives with a predetermined pressing force.
  • the force with which the grinding takes place is constant and does not depend on the position of the grinding element. Since the steel of the knives is homogeneous, the grinding process leads to an even reduction in diameter.
  • the specific surface pressure can be low because the effective grinding surface of the bank stone is relatively large. As a result, knife wear is reduced when grinding.
  • the bench stone can be attached to a holder without great effort, which is moved back and forth along the knife roller.
  • This arrangement is structurally simple and much less complex than a motor-driven grinding wheel.
  • a lower stability is sufficient for the guide crossmember because the weight of the arrangement is lower and because the exact position assignment is not important.
  • a particular advantage can be seen in the fact that deformations of the knife roller do not impair grinding. Because the bank stone can dodge radially while maintaining the pressure force. It is therefore possible to use a holder which holds the bank stone on the knife roller regardless of the operating position of the support roller, that is to say regardless of the folding or non-folding. While the known grinding wheel had to be lifted off the knife roller during the folding because even small differences in the thickness of the material to be folded led to a deflection of the knife roller and thus to uneven grinding, the bench stone can now carry out the grinding process continuously. In this way, the knives are not only sharp at the beginning of the folding process, but throughout the entire folding time. The surface quality of the folded material is high. In addition, the cut quality is excellent, so that the fold size can be maintained more precisely.
  • the bench stone is advantageously arranged on the top of the knife roller.
  • the bank stone can be provided at this point because it takes up little space. If the knife roller is bent during folding by the support roller arranged next to it, this has no influence on the position of the bank stone.
  • the pressure force can be a weight force entirely or largely.
  • the pressure force is at least partially generated by the weight of the bank stone and parts of the bank stone holder. There is therefore no need for a special force generator.
  • other power generation agents such as springs can also be used.
  • the additional weight attached can be adjustable along the swivel lever. This allows individual adaptation to the respective operating conditions.
  • the additionally attached weight can be attached as a counterweight on the side of the pivot lever axis opposite the bench stone. This makes it possible to keep the pressing force of the bank stone sufficiently small if the construction weight is too large.
  • the bank stone is arranged offset by 60 to 120 ° with respect to the folding gap. With such a displacement in the range of 90 °, bending of the knife roller due to different folding pressure play an even smaller role for the grinding process.
  • the bench stone should have a width of 40 to 60 mm in the circumferential direction of the knife roller and a length of at least twice the width in the axial direction. This results in an optimal effective grinding surface.
  • the pivot lever is rotatably attached to a carriage which is not rotatable on a crossbar along the knife roller.
  • the pivot lever can have a relatively small mass, so that the pressing force is also small. It is held securely by the non-rotating slide.
  • the swivel lever can be locked on the carriage.
  • the bench stone can then be used as a stationary grinding element, for example if the knife roller has to be ground cylindrically in the case of newly inserted knives.
  • the bench stone holder on the swivel lever can be adjusted approximately radially to the knife roller. In this way, the bench stone can be gradually fed to the knife roller when the pivoting lever is locked in order to grind it in.
  • a device for damping the radial movement of the bank stone is also advantageous.
  • This can be arranged in particular between the pivot lever and the slide. It can be conventional vibration dampers, such as those used as steering dampers in vehicles be used.
  • the damping can, however, also be brought about by increasing the movable mass of the swivel lever, for example by attaching several mass elements in such a way that their moments cancel each other out.
  • the invention is explained in more detail below on the basis of a preferred exemplary embodiment shown in the drawing.
  • the drawing shows a schematic cross section through a folding machine according to the invention.
  • a knife roller 2 with knives 3 arranged on the circumference is fixed in place. It is driven in the direction of arrow 4 by a motor, not shown.
  • a support roller 5 is mounted on pivot levers 6, which can be moved from the illustrated working position, in which it forms a folding nip 7 together with the knife roller 2, to a rest position, in which the folding nip is open. In this rest position, the folded material 8 can be fed via a work table 9.
  • the platen roller 5 is driven at a lower peripheral speed than the knife roller 2 in the direction of arrow 10.
  • a wiper 11 is assigned to it on the underside.
  • a holding roller 13 rotatable in the direction of the arrow 12 cooperates with the support roller 5 in the working position in order to bring about a transport gap 14 for the forced feeding of the folded material 8 in the direction of the arrow 15.
  • a pneumatic safety device 16 is assigned to the holding roller 13.
  • a vane rotor 18 rotating in the direction of the arrow 17 is provided, which serves as a holding element for the folded material 8. The folding machine described so far is known.
  • the holder 21 is fastened to a swivel arm 22 which can be swiveled about an axis 23 parallel to the axis of the knife roller 2.
  • the bank stone 20 can therefore move approximately on a radial path.
  • the pivot axis 23 is fastened to a carriage 24 which is held in a rotationally fixed manner on a cross member 25 and can be moved back and forth along the latter.
  • a tension element 26, such as a rope, chain or the like, is provided on the side of the pivot axis 23 opposite the bank stone 20, an additional weight 27 is attached as a counterweight and is adjustable on a rod 28.
  • the bank stone has a width in the circumferential direction of 50 mm and a length in the axial direction of 120 mm.
  • the bench stone 20 is offset from the seam gap 7 by a little more than 90 °. It lies on the knives 3 of the knife roller 2 with a constant weight.
  • the weight is composed of the following components: - weight of bank stone 20 - Weight of the bracket 21 - Weight of the pivot lever 22 translated in the lever ratio - Additional weight 27 translated in leverage ratio.
  • the additional weight 27 acts against the three other weights. In this way, the effective grinding weight can be set precisely.
  • a damping device 29 is provided between pivot lever 22 and slide 24. This consists of a piston-cylinder arrangement, the two pressure chambers filled with liquid are connected to each other via a throttle. Vibration dampers of this type are commercially available. Instead, other known damping devices, such as metal-rubber damping elements, can also be used. It is also possible to mount mass elements of equal size at both times of the pivot axis 23, which are ineffective with regard to the pressing force, but increase the mass to be moved.
  • a lifting device 30 is attached between pivot lever 22 and slide 24. This consists of a piston-cylinder unit that is operated hydraulically or pneumatically. At the end of the operation, the swivel lever 22 can be pulled up against the carriage and the bench stone 20 can thereby be lifted off the circumference of the knife roller 2.
  • the bank stone 20 is in constant contact with the knife roller 2, also during the folding and during the folding pauses, so that it is continuously ground.
  • the knives 3 are accordingly continuously sharp, which improves both the cut quality and the surface quality of the folded material.
  • the pivot lever 22 can be locked by means of a clamping device 31 which extends through an arcuate slot 32.
  • the bank stone holder 21 can be adjusted by means of a handwheel 33 approximately radially to the knife roller 2 on the pivot lever 22. If a knife roller 2 has been inserted, you can by locking the pivot lever 22 and by an appropriate feed movement of the holder 21 grind the knife 3 cylindrically. They then maintain their cylindrical shape later in the operation, in which the bench stone only rests.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
EP19880113345 1987-08-28 1988-08-17 Falzmaschine Withdrawn EP0304790A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3728761 1987-08-28
DE19873728761 DE3728761A1 (de) 1987-08-28 1987-08-28 Falzmaschine

Publications (1)

Publication Number Publication Date
EP0304790A1 true EP0304790A1 (de) 1989-03-01

Family

ID=6334700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880113345 Withdrawn EP0304790A1 (de) 1987-08-28 1988-08-17 Falzmaschine

Country Status (4)

Country Link
EP (1) EP0304790A1 (enrdf_load_stackoverflow)
CS (1) CS274475B2 (enrdf_load_stackoverflow)
DE (1) DE3728761A1 (enrdf_load_stackoverflow)
YU (1) YU154788A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2673196A1 (fr) * 1991-02-22 1992-08-28 Turner Verwaltungs Gmbh Procede d'exploitation d'une echarneuse, et echarneuse associee.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796070A (en) * 1973-01-29 1974-03-12 Lyon M & Co Apparatus for removing flesh from animal hides
GB2058130A (en) * 1979-09-06 1981-04-08 Turner Machinery Ltd Treating hides
FR2470802A1 (fr) * 1979-12-04 1981-06-12 Moenus Maschf Machine a cylindre a lames pour le traitement de peaux

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE247061C (enrdf_load_stackoverflow) *
US2558811A (en) * 1949-07-20 1951-07-03 Levor & Co Inc G Apparatus for facing leather or the like

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796070A (en) * 1973-01-29 1974-03-12 Lyon M & Co Apparatus for removing flesh from animal hides
GB2058130A (en) * 1979-09-06 1981-04-08 Turner Machinery Ltd Treating hides
FR2470802A1 (fr) * 1979-12-04 1981-06-12 Moenus Maschf Machine a cylindre a lames pour le traitement de peaux

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2673196A1 (fr) * 1991-02-22 1992-08-28 Turner Verwaltungs Gmbh Procede d'exploitation d'une echarneuse, et echarneuse associee.

Also Published As

Publication number Publication date
DE3728761A1 (de) 1989-03-16
YU154788A (en) 1990-12-31
DE3728761C2 (enrdf_load_stackoverflow) 1990-08-16
CS577888A2 (en) 1990-03-14
CS274475B2 (en) 1991-04-11

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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