EP0363652B1 - Verfahren und hydraulische Vorschubeinrichtung zum Schneiden eines Gutsstranges - Google Patents

Verfahren und hydraulische Vorschubeinrichtung zum Schneiden eines Gutsstranges Download PDF

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Publication number
EP0363652B1
EP0363652B1 EP89116634A EP89116634A EP0363652B1 EP 0363652 B1 EP0363652 B1 EP 0363652B1 EP 89116634 A EP89116634 A EP 89116634A EP 89116634 A EP89116634 A EP 89116634A EP 0363652 B1 EP0363652 B1 EP 0363652B1
Authority
EP
European Patent Office
Prior art keywords
feed
cylinder
extrusion product
cutting
strand
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.)
Expired - Lifetime
Application number
EP89116634A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0363652A2 (de
EP0363652A3 (de
Inventor
Uwe Reifenhäuser
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0363652A2 publication Critical patent/EP0363652A2/de
Publication of EP0363652A3 publication Critical patent/EP0363652A3/de
Application granted granted Critical
Publication of EP0363652B1 publication Critical patent/EP0363652B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
    • B26D7/0608—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form by pushers

Definitions

  • the invention relates to a method and a hydraulic feed device for cutting a strand of material, preferably a chop strand, which is shifted cyclically in the direction of its longitudinal axis. Between two feed cycles, a cutting member rotating about an axis parallel to the longitudinal axis of the strand cuts a disk from the strand. At least for the duration of the cut, the newly created end face of the strand is largely covered by a side face of the knife.
  • a side face of the knife is known from DE-A-3 606 979.
  • a knife with a spiral cutting edge is used as the cutting element, for example, which dips increasingly into the strand cross-section with every complete revolution over an angle of rotation of up to about 270 ° until the newly created end face of the strand is largely covered by a knife side surface, whereas the knife moves outside the strand cross-section over the rotation angle remaining to complete the rotation up to consequently 90 °.
  • the strand can be advanced unhindered by the amount of a slice thickness, so that the next slice can be cut off in the same way during the following rotation.
  • the intermittent advance of the strand is indispensable due to the conditions described above, in particular in the case of relatively rigid or brittle products, such as, for example, a chop strand to be processed in the frozen state. Therefore, the known methods work without exception with intermittently operated feed devices for the strand, which require very complex controls with which, for example, a hydraulic feed cylinder can be charged with oil, the delivery volume per unit of time and the oil pressure having to be changed constantly. Such a control is not only structurally complex and maintenance-sensitive, but also leads to a loss of energy after each feed cycle, which is to be used for the operation of a feed pump and can no longer be used for the feed work.
  • the invention has for its object to develop a method of the type described above so that the use of a constructive and operationally complex control can be dispensed with, in order to nevertheless ensure a precisely defined cyclical feed of the material strand.
  • the feed pump can be used for the loading of the feed unit remains in operation continuously.
  • the oil volume required for a feed stroke is conveyed evenly distributed over the entire working cycle of a cutting process from feed stroke to feed stroke, so that the storage causes a buffering of the partial volume which is conveyed by the pump during two successive feed strokes of the strand, although the feed unit meanwhile has no movement executes.
  • the work performed by the pump is sometimes used directly in the feed work and temporarily for loading the accumulator and thus remains available for the feed work, if only indirectly .
  • feed devices Although different feed devices appear suitable for carrying out the method according to the invention, storage, for example in the form of springs and the like. Like. Clampable components are conceivable, a hydraulic feed device with a is particularly recommended Cylinder-piston unit which is acted upon by a pump via a line in which a check valve is arranged.
  • a hydraulic accumulator is connected to the line between the cylinder-piston unit and the check valve.
  • the feed device according to the invention is thus distinguished by an extremely simple construction, with which all the essential features of the method according to the invention can nevertheless be reliably carried out.
  • the hydraulic accumulator is divided into two chambers by an elastically deformable partition, one of which is connected to the line leading to the cylinder-piston unit.
  • an embodiment of the invention provides that the partition of the hydraulic accumulator is equipped with devices by which the restoring force can be changed.
  • Such devices are, for example, actuators by means of which the deformability of the partition of the hydraulic accumulator is restricted or prevented over more or less large surface parts.
  • the drawing shows a hydraulic plan for an exemplary embodiment of a feed device for carrying out the method according to the invention:
  • the feed unit essentially consists of a cylinder-piston unit 1, by means of which a pressure plate, not shown, can be displaced, which presses on the end of a strand to be cut into slices and pushes it forward cyclically in the longitudinal direction by a slice thickness as soon as a cutting element passes through a rotating area, in which the cutting element is located outside of the strand projection.
  • the cylinder-piston unit 1 is acted upon by a pump 2, which is driven by a motor 3, with oil from a tank 4.
  • the pump 2 is connected to the tank 4 via a suction line 5 and to the cylinder-piston unit 1 via a pressure line 6.
  • the line 6 leads first to a solenoid valve 7, from there to a flow regulator 8 and further via a check valve 9 to a cylinder 10 of the unit 1 and is connected to it so that the one located on the rear of a piston 11 Part of the cylinder 10 is applied.
  • the part of the cylinder 10 located on the front side of the piston 11 is connected to the tank 4 via a compensating line 12, which is guided via the solenoid valve 7, so that the cylinder 10 is filled with oil in all positions of the piston 11, that is pushed back into the tank 4 or displaced again from the tank 4 when the piston 11 is displaced in the same amount via the equalization line 12, like oil is fed into the cylinder 10 via the pressure line 6 or when the piston 11 is returned is returned to its starting position in tank 4.
  • the solenoid valve 7 is switched so that the pressure line 6 and the compensating line 12 interchange their functions, which they perform when the piston is fed in cycles. Independently of this, for a differential circuit via a bypass line 14 with a check valve 15, oil from the part of the cylinder 10 which lies on the back of the piston 11 can be returned to the equalization line 12.
  • a safety valve 17 which responds under exceptional conditions can be opened in order to enable a short-circuit circuit for the oil which may continue to be delivered by the pump 2 and thereby the The rest of the system should not be overloaded.
  • a branch line 18 leads from the quantity regulator 8 via a filter 19 to the tank 4, as a result of which a partial oil flow can be subjected to cleaning at all times.
  • An essential component of the system is a hydraulic accumulator 20, which is connected to the line 6 between the check valve 9 and the cylinder 10.
  • the hydraulic accumulator 20 enables a constant volume flow of oil to be conveyed regardless of whether the piston 11 is in motion or is stationary in order to accomplish a feed stroke. If the piston 11 is also blocked as a result of the strand prevented from being advanced by a cutting element, the pressure in the line 6 increases. This increase in pressure is limited by the fact that oil escapes into the hydraulic accumulator 20 and charges it.
  • the blockage of the piston 11 is released by the displaceability of the strand to be cut into slices.
  • the piston then executes the feed movement provided in accordance with the disk thickness, the feed force arising from the pressure of the volume flow continuously conveyed via line 6 and from the pressure of the supplementary flow Volume flow that comes into effect due to the discharge of the hydraulic accumulator due to the pressure drop.
  • the hydraulic accumulator 20 just as with the limitation of the pressure rise, has an effect on a limitation of the pressure drop.
  • the pump 2 meanwhile delivers an essentially constant volume flow which can be maintained during the entire cutting process of a strand.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shearing Machines (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Processing Of Meat And Fish (AREA)
EP89116634A 1988-10-14 1989-09-08 Verfahren und hydraulische Vorschubeinrichtung zum Schneiden eines Gutsstranges Expired - Lifetime EP0363652B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3835047A DE3835047A1 (de) 1988-10-14 1988-10-14 Verfahren und hydraulische vorschubeinrichtung zum schneiden eines gutsstranges
DE3835047 1988-10-14

Publications (3)

Publication Number Publication Date
EP0363652A2 EP0363652A2 (de) 1990-04-18
EP0363652A3 EP0363652A3 (de) 1991-03-06
EP0363652B1 true EP0363652B1 (de) 1993-04-21

Family

ID=6365142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89116634A Expired - Lifetime EP0363652B1 (de) 1988-10-14 1989-09-08 Verfahren und hydraulische Vorschubeinrichtung zum Schneiden eines Gutsstranges

Country Status (3)

Country Link
EP (1) EP0363652B1 (enrdf_load_stackoverflow)
DE (2) DE3835047A1 (enrdf_load_stackoverflow)
ES (1) ES2041918T3 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4439641C1 (de) * 1994-11-07 1995-11-02 Uwe Reifenhaeuser Verfahren zum Schneiden von Lebensmitteln sowie Vorrichtung zur Durchführung des Verfahrens

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2418640A1 (de) * 1974-04-18 1975-11-06 Lynggaard Skandinavia Scheibenschneidmaschine, insbesondere fuer fleischereibetriebe
DE2925834A1 (de) * 1979-06-27 1981-01-15 Toni Reifenhaeuser Schneidmaschine, insbesondere fuer speck, wurst u.a. lebensmittel
DE3606979C1 (en) * 1986-03-04 1987-05-14 Toni Reifenhaeuser Method and device for cutting compressible material

Also Published As

Publication number Publication date
DE3835047C2 (enrdf_load_stackoverflow) 1990-08-30
DE58904142D1 (de) 1993-05-27
EP0363652A2 (de) 1990-04-18
EP0363652A3 (de) 1991-03-06
DE3835047A1 (de) 1990-04-19
ES2041918T3 (es) 1993-12-01

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