EP0988941A2 - Dispositif pour couper des profilés creux allongés en matières thermoplastiques - Google Patents

Dispositif pour couper des profilés creux allongés en matières thermoplastiques Download PDF

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Publication number
EP0988941A2
EP0988941A2 EP99118583A EP99118583A EP0988941A2 EP 0988941 A2 EP0988941 A2 EP 0988941A2 EP 99118583 A EP99118583 A EP 99118583A EP 99118583 A EP99118583 A EP 99118583A EP 0988941 A2 EP0988941 A2 EP 0988941A2
Authority
EP
European Patent Office
Prior art keywords
knife
cutting
frame
profiles
cut
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.)
Granted
Application number
EP99118583A
Other languages
German (de)
English (en)
Other versions
EP0988941A3 (fr
EP0988941B1 (fr
Inventor
Ernst Dr. Krüger
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.)
Milacron Inc
Original Assignee
Cpm Compounding Processing Machinery 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 Cpm Compounding Processing Machinery GmbH filed Critical Cpm Compounding Processing Machinery GmbH
Publication of EP0988941A2 publication Critical patent/EP0988941A2/fr
Publication of EP0988941A3 publication Critical patent/EP0988941A3/fr
Application granted granted Critical
Publication of EP0988941B1 publication Critical patent/EP0988941B1/fr
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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
    • B26D1/08—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
    • 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
    • B26D7/08—Means for treating work or cutting member to facilitate cutting

Definitions

  • Plastic profiles are used as continuous products in the Extrusion process manufactured. The products are then by suitable separation units to processable Cut lengths. Usually saws are used for this used. The use of such saws has the Disadvantage that in addition to a large amount of chips considerable noise level arises.
  • the knife is in a guided on the side.
  • the width or the game these guides are partially adjustable. Basically these knives slide freely in their movement.
  • Knife separation systems Another major disadvantage known Knife separation systems is that in particular so-called main window profiles, door frame profiles or other large-volume and thick-walled building profiles Knife plunges in a straight line, however is deflected within the profile during the cut. Reasons for this are internal tensions in the Profile or insufficient symmetry in the bevel angle of the knife.
  • the knife deflection means that the Cutting quality or the cutting angle and the straight Course of the cut in many cases for the Production requirements are not sufficient. This has as a result that the use of knife separation in the Manufacture of extruded building profiles in many cases is excluded.
  • a Knife cutting device to develop so that a Building profiles can be cut without cutting, of the quality of such a cut Requirements are sufficient.
  • the knife in clamped a stable frame, with the help of which Cut the knife under a certain pretension can be clamped.
  • the preload under which the Knife is held is based on the Tension limit of the knife steel. That way the knife is always held in a stable position.
  • the frame is dimensioned so that the required Clamping forces are generated safely by him or by him as well can be safely recorded, such as during the Cutting forces.
  • the Stenter moved with the knife the stenter is guided laterally.
  • Such a device designed according to the invention allows a straight, right-angled cut even with a stringent requirements quality to perform when the cutting edge of the Knife or its clamping certain geometric Subject to errors.
  • a knife 1 clamped in a tenter which made two side elements 2 and 4 and a head element 3 and a foot element 5 is constructed.
  • the clamping points 9, 10, on which the knife 1 is connected to the stenter is necessary to achieve the Knife tension near the diagonal to the cutting direction S arranged knife edge la.
  • Knives 1 Other possible stops or tension points for the Knives 1 are in FIG. 1 by reference numerals 11 to 15 featured.
  • clamping devices In the area of the clamping points 9 to 15 can not here shown clamping devices are attached, wherein the fixing of the knife 1 in the clamping points 9 to 15 for example with a quick release device can be done.
  • the stenter has in this example Execution on the upper left side a pivot point 7, around which the left side element 4 is pivotable.
  • the frame can be clamped. Since doing that Knife 1 on the one hand, for example, at the clamping point 10 firmly with the pivotable about the pivot point 7 Side element 4 connected and on the other hand simultaneously for example, at the fixed point 9 at the fixed Side element 2 is held by the bracing of the pivotable side element 4, the knife 1 as well biased.
  • the tension reached in the knife 1 corresponds to at least 4% of the invention Tensile strength of the steel from which the knife 1 is made.
  • a groove 8 is exemplary in the right side spar 2 shown.
  • the groove 8 forms a lateral guide for the frame.
  • Ball bushing guides shown are used also function free of the knife clamping forces.
  • a profile 16 is guided through the stenter, which is cut to length by means of the knife 1.
  • the separating device according to the invention is suitable basically also for cutting pipes or similar extruded hollow chamber products. It is chipless Separation not only possible with PVC profiles, but also In principle, almost all plastics can be used with this be separated. The quality of the separation quality then depends still depends primarily on the separation speed.
  • FIG. 2 there is one scissor-shaped arrangement of the clamping device realized.
  • the knife 27 is in the two z-shaped Frames 17 and 18 at stops 24 and 25 excited, which is arranged near the knife edge 27a and in which the knife 27 with the lower one Arm of the z-shaped frame 17, 18 are connected.
  • the Z-shaped Frames 17 and 18 are common Pivotal point 19 can be pivoted in the manner of scissors, that when the upper arms 17a, 18a approach each other Frame 17, 18 the lower arms 17b, 18b of frame 17, 18 separate from each other.
  • the frames are 17, 18 at the upper end of their upper arms 17b, 18b via a upper cross frame 23 connected to one another Separating force is applied to the upper arms 17b, 18b to move pivot point 19.
  • the connection is over the two free slot connections 20 and 21 manufactured.
  • the device shown in FIG. 2 is biased via a clamping device 22, not shown in detail.
  • This tensioning device 22 pulls for tensioning the Knife 27, the upper arms 17b, 18b of the frames 17 and 18 together around pivot point 19 so that the lower arms 17a, 18a of the frames 17, 18 are moved apart.
  • the knife 27 becomes transverse to the cutting direction 26 biased until subjected to tension which is at least 4% of the tensile stress of the steel, from which the knife 27 is made.
  • the knife drive takes place during a cutting process in Cutting direction 26.
  • the z-shaped frames 17 and 18 also serve to manage the overall system, the frames 17, 18 in guides, not shown are led.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP99118583A 1998-09-21 1999-09-21 Dispositif pour couper des profilés creux allongés en matières thermoplastiques Expired - Lifetime EP0988941B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843262 1998-09-21
DE19843262A DE19843262A1 (de) 1998-09-21 1998-09-21 Meßspannrahmen

Publications (3)

Publication Number Publication Date
EP0988941A2 true EP0988941A2 (fr) 2000-03-29
EP0988941A3 EP0988941A3 (fr) 2001-06-20
EP0988941B1 EP0988941B1 (fr) 2003-12-10

Family

ID=7881721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99118583A Expired - Lifetime EP0988941B1 (fr) 1998-09-21 1999-09-21 Dispositif pour couper des profilés creux allongés en matières thermoplastiques

Country Status (3)

Country Link
EP (1) EP0988941B1 (fr)
AT (1) ATE255984T1 (fr)
DE (2) DE19843262A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1293310A3 (fr) * 2001-09-13 2004-03-10 Technoplast Kunststofftechnik Gesellschaft m.b.H. Dispositif pour la coupe sans enlèvement de copeaux de profilés en matière plastique
GB2536337A (en) * 2015-03-10 2016-09-14 Nien Made Entpr Co Ltd Cutting machine for window covering

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3522748A (en) * 1967-09-27 1970-08-04 Charles Treffner Machine for slitting plastic film and the like
DE2554695A1 (de) * 1975-12-05 1977-06-08 Erhard Ing Grad Breu Schneidmaschine fuer gefrierfleisch
DE19756932A1 (de) * 1997-12-20 1999-06-24 Cpm Gmbh Trennmesser
DE29808312U1 (de) * 1998-05-11 1998-08-13 cpm GmbH, 49124 Georgsmarienhütte Trennmesser

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1293310A3 (fr) * 2001-09-13 2004-03-10 Technoplast Kunststofftechnik Gesellschaft m.b.H. Dispositif pour la coupe sans enlèvement de copeaux de profilés en matière plastique
US7204180B2 (en) 2001-09-13 2007-04-17 Technoplast Kunststofftechnik Gmbh Apparatus for cutting plastic profiles
GB2536337A (en) * 2015-03-10 2016-09-14 Nien Made Entpr Co Ltd Cutting machine for window covering

Also Published As

Publication number Publication date
DE19843262A1 (de) 2000-03-30
ATE255984T1 (de) 2003-12-15
DE59908004D1 (de) 2004-01-22
EP0988941A3 (fr) 2001-06-20
EP0988941B1 (fr) 2003-12-10

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