EP0351632A2 - Dispositif d'entraînement pour une machine à découper travaillant par intermittence - Google Patents

Dispositif d'entraînement pour une machine à découper travaillant par intermittence Download PDF

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Publication number
EP0351632A2
EP0351632A2 EP89112160A EP89112160A EP0351632A2 EP 0351632 A2 EP0351632 A2 EP 0351632A2 EP 89112160 A EP89112160 A EP 89112160A EP 89112160 A EP89112160 A EP 89112160A EP 0351632 A2 EP0351632 A2 EP 0351632A2
Authority
EP
European Patent Office
Prior art keywords
drive
cutting device
cutting
hydraulic cylinder
starting position
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Withdrawn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
EP89112160A
Other languages
German (de)
English (en)
Other versions
EP0351632A3 (fr
Inventor
Martin Michels
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.)
Sigri GmbH
Original Assignee
Sigri 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 Sigri GmbH filed Critical Sigri GmbH
Publication of EP0351632A2 publication Critical patent/EP0351632A2/fr
Publication of EP0351632A3 publication Critical patent/EP0351632A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/14—Crank and pin means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/12—Fluid-pressure means

Definitions

  • the invention relates to a drive device for cyclically operating cutting devices, consisting of a hydraulic drive which acts on a crank mechanism, the drive rod of which is connected to the cutting device.
  • Cutting devices such as those used for cutting extruded strands, were previously operated manually. More modern systems consisted of a motor-driven drive with flywheel and eccentric, in which the eccentric acted on a drive rod of the cutting device at a predetermined time by means of a coupling, whereby the cutting process was carried out. This type of drive is also known from eccentric presses. Today hydraulic drives are often used. The piston rod of a hydraulic cylinder is connected to the cutting tool via a mechanical coupling. Via switching valves, a liquid coming from a positive displacement pump is pressed into the chamber of the hydraulic cylinder, which is to be enlarged by moving the piston while Hydraulic fluid from the chamber, which is reduced in size during this process, flows into a reservoir.
  • the work performed by the hydraulic fluid in the cylinder causes a displacement of the piston and at the same time a displacement of the piston rod coupled to it.
  • the piston rod transfers its movements to the cutting device and starts the cutting tool.
  • single-acting cutting devices with one or more or double-acting cutting devices with one or more cutting tools working against each other can be operated.
  • the cutting tool must move forward from a rest position to a reversal point and then backward to the home rest position.
  • the hydraulic pressure In the case of a drive with hydraulic cylinders acting directly on the cutting tools, the hydraulic pressure must be switched to the other cylinder chamber at the reversal point (and in the initial resting position) so that the piston and piston rod perform the opposite movement. This is done by valves controlled by limit switches.
  • Switching the valves when reversing the direction of movement takes time, which extends the actual cutting process and reduces the possible work cycles per unit of time.
  • the distance on which the cutting device must be carried along in synchronism with the speed of the strand must be ent be extended accordingly. This means greater effort due to higher acquisition and operating costs and more space.
  • the limit switches controlling the valves, particularly in rough operation are susceptible to faults and must be checked and adjusted at short intervals. The failure of such switches can damage the cutting tool, misalignment can lead to a poor cut and lead to rejects.
  • the object of the invention is to remedy these disadvantages.
  • a drive device with a hydraulically reciprocating cylinder (3) on at least one firmly anchored piston rod (5, 5 '), on the outer cylinder jacket of which a toothed rack (6) is attached, which with the teeth of the Drive wheel (7) of a crank mechanism (8) meshes, the drive rod (9) of which acts on the knife (10) of the cutting device (1), so that when the hydraulic cylinder (3) moves the drive device (15) in one direction, a full operation the cutting device (1) is executed starting from its starting position via the reversal point until it returns to the starting position.
  • the drive device and the cutting device must be firmly connected to one another or fixed in their position relative to one another and firmly anchored.
  • the hydraulic cylinder can be equipped with one or more piston rods, which also take the lead during the movements.
  • a counter ensures Bearings, for example from rollers, ensure the cylinder runs smoothly.
  • further mechanical aids for guiding the cylinder during its back and forth movements can be attached. Different embodiments and operating characteristics can be obtained by selecting suitable machine elements and coordinating them structurally with one another.
  • the path to be covered by the cutting tool, the average cutting speed of the cutting tool and the position of the cutting device or of parts thereof can be adapted to the requirements using known technical means.
  • the drive can be used for all types of mechanical cutting devices with reciprocating cutting tools, such as one-sided with one or more cutting tools or double-acting.
  • the drive consists of simple, robust, low-interference components. There is no reversal of motion on the hydraulic part of the drive during a cut. As a result, no valves are required to reverse the direction of movement of the knife. The time gained in this way increases the number of work cycles per unit of time, and the length of the synchronization path for the cutting device and the strand can be shortened in extrusion systems. The faster cutting results in a clean cut. There is no need to purchase, adjust, maintain or repair the limit switches.
  • the starting and end point of the cutting tool are precisely defined by the mechanical fixation and can still be adapted to changing circumstances using simple devices.
  • the risk of damage to the cutting tools is low despite the high cutting quality and tolerances.
  • the section line II-II in FIG. 1 characterizes the imaging plane shown in FIG. 2.
  • the section line I-I in FIG. 2 characterizes the imaging plane shown in FIG. 1.
  • a hydraulic cylinder (3) via two piston rods (5, 5) which extend from the piston (4) of the hydraulic cylinder (3) on opposite sides and are anchored in the holding device (2) ') Mounted so that it can perform movements in the direction of the piston rods (5, 5').
  • a toothed rack (6) is attached to the outer jacket of the hydraulic cylinder (3) and meshes with the drive wheel (7) of the crank mechanism (8), the drive rod (9) of which is coupled to the cutting tool (10) of the cutting device (1).
  • the rollers (11, 11 ') serve to support and guide the hydraulic cylinder.
  • the hydraulic fluid coming from the hydraulic unit equipped with control elements and not shown in the drawing enters the chamber (12) of the hydraulic cylinder (3) via line (13) and piston rod (5) and moves it on the piston rods (5 , 5 ') and the support rollers (11, 11') in the direction of the piston rod (5).
  • the hydraulic fluid of the second chamber (12 ') of the hydraulic cylinder (3) through the piston rod (5') and line (13 ') is discharged.
  • the movement of the hydraulic cylinder (3) is via the rack (6) on the drive wheel (7) of the crank mechanism (8) and from this via the crank pin (14) and the drive rod (9) on the cutting tool (10) of the cutting device (1 ) transfer.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shearing Machines (AREA)
  • Nonmetal Cutting Devices (AREA)
EP19890112160 1988-07-18 1989-07-04 Dispositif d'entraínement pour une machine à découper travaillant par intermittence Withdrawn EP0351632A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8809188U 1988-07-18
DE8809188U DE8809188U1 (de) 1988-07-18 1988-07-18 Antriebsvorrichtung für taktweise arbeitende Schneidvorrichtungen

Publications (2)

Publication Number Publication Date
EP0351632A2 true EP0351632A2 (fr) 1990-01-24
EP0351632A3 EP0351632A3 (fr) 1991-08-28

Family

ID=6826074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890112160 Withdrawn EP0351632A3 (fr) 1988-07-18 1989-07-04 Dispositif d'entraínement pour une machine à découper travaillant par intermittence

Country Status (2)

Country Link
EP (1) EP0351632A3 (fr)
DE (1) DE8809188U1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2153736A1 (es) * 1998-05-27 2001-03-01 Serveis De Produccio Empresari Perfeccionamientos en el calibrado lateral de laminas extrusionadas.
CN101774185A (zh) * 2009-01-14 2010-07-14 上海坚明办公用品有限公司 裁纸机的裁切作动机构
CN102233454A (zh) * 2010-05-05 2011-11-09 省冈机械工业股份有限公司 接力式裁切机
US20140326118A1 (en) * 2013-05-03 2014-11-06 The Procter & Gamble Company Cutting apparatuses

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8809188U1 (de) * 1988-07-18 1988-09-01 Sigri GmbH, 8901 Meitingen Antriebsvorrichtung für taktweise arbeitende Schneidvorrichtungen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1083817A (fr) * 1953-09-18 1955-01-12 Cisaille à placages comportant une lame de cisaille animée mécaniquement d'un mouvement de va-et-vient vertical par un entraînement à manivelle
US3772966A (en) * 1972-06-28 1973-11-20 C Mills Fluid torque operator
GB2057330B (en) * 1979-08-30 1984-06-06 Goodyear Tire & Rubber Shearing device
DE3631162A1 (de) * 1986-09-12 1988-03-24 Wolfram Sontheimer Scheibenschneidvorrichtung
DE8809188U1 (de) * 1988-07-18 1988-09-01 Sigri GmbH, 8901 Meitingen Antriebsvorrichtung für taktweise arbeitende Schneidvorrichtungen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2153736A1 (es) * 1998-05-27 2001-03-01 Serveis De Produccio Empresari Perfeccionamientos en el calibrado lateral de laminas extrusionadas.
CN101774185A (zh) * 2009-01-14 2010-07-14 上海坚明办公用品有限公司 裁纸机的裁切作动机构
CN102233454A (zh) * 2010-05-05 2011-11-09 省冈机械工业股份有限公司 接力式裁切机
CN102233454B (zh) * 2010-05-05 2013-03-20 省冈机械工业股份有限公司 接力式裁切机
US20140326118A1 (en) * 2013-05-03 2014-11-06 The Procter & Gamble Company Cutting apparatuses
US9956699B2 (en) * 2013-05-03 2018-05-01 The Procter & Gamble Company Cutting apparatuses

Also Published As

Publication number Publication date
DE8809188U1 (de) 1988-09-01
EP0351632A3 (fr) 1991-08-28

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