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EP0097992A1 - Verfahren und Vorrichtung zum Konturschneiden von Kunststoffprodukten - Google Patents

Verfahren und Vorrichtung zum Konturschneiden von Kunststoffprodukten Download PDF

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Publication number
EP0097992A1
EP0097992A1 EP83200884A EP83200884A EP0097992A1 EP 0097992 A1 EP0097992 A1 EP 0097992A1 EP 83200884 A EP83200884 A EP 83200884A EP 83200884 A EP83200884 A EP 83200884A EP 0097992 A1 EP0097992 A1 EP 0097992A1
Authority
EP
European Patent Office
Prior art keywords
filaments
shaped frame
starting material
work table
tension
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
EP83200884A
Other languages
English (en)
French (fr)
Other versions
EP0097992B1 (de
Inventor
Hendricus Johannes Maria Van Dijk
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.)
Gebr Van Dijk Bv
Original Assignee
Gebr Van Dijk Bv
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19839892&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0097992(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Gebr Van Dijk Bv filed Critical Gebr Van Dijk Bv
Priority to AT83200884T priority Critical patent/ATE24682T1/de
Publication of EP0097992A1 publication Critical patent/EP0097992A1/de
Application granted granted Critical
Publication of EP0097992B1 publication Critical patent/EP0097992B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/06—Severing by using heat
    • B26F3/08—Severing by using heat with heated members
    • B26F3/12—Severing by using heat with heated members with heated wires
    • 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
    • B26D1/547—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 wire-like cutting member
    • B26D1/553—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 wire-like cutting member with a plurality of wire-like cutting members

Definitions

  • the invention relates to a process for contour cutting of a number of uniform plastic products from a block of starting material, using a plurality of filaments disposed in parallel to one another and heated by an electric current, the starting material being given a movement in at least one direction.
  • the cutting effect is enhanced whilst, in addition, a virtually straight cut is obtained, making contour cutting feasible.
  • the appearance and the structure of the surface of the cut product will tell whether an oscillating filament has been used, because in that case on the one hand the surface will be firmer and contours virtually identical over the entire width of the product owing to the absence of a perceptible deflection of the filament, while on the other hand the surface is formed more smoothly under the influence of the filament and exhibits a closed structure, quite unlike a product formed with a mechanically operating cutting wire.
  • An apparatus for the application of such a process according to the invention is provided with a work table movable substantially in horizontal direction for receiving at least a part of a block of starting material, and with a drive mechanism for the work table operated according to a programme, a number of substantially vertical columns, a U-shaped framework movable up and down in a vertical direction along the vertical columns and substantially disposed in a horizontal plane, in which frame a number of filaments have been mounted in parallel to one another for cutting of a plastic material, a drive for moving the U-shaped framework in a vertical direction along the columns according to a certain programme corresponding with the programme for the horizontal displacement of the work table, and a drive for synchronous oscillating movement of each of the filaments in their long direction.
  • Such an apparatus can be of limited vertical dimensions, because the U-shaped framework need only be raised sufficiently high for a block of starting material to be passed underneath.
  • a work table of considerable length, for instance 4 metres, which enables the customary starting material, i.e. a block with a length of 12 metres, to be cut in three passes.
  • the surface of the work table is preferably provided with recesses into which the filaments can drop in their bottommost position, so that after one cut in a vertical direction the block of starting material can be moved forward for contour cutting of the second portion of the block of starting material.
  • the apparatus depicted in Figure.. comprises a base frame 1 on which four vertical columns 2 have been mounted in a rectangle. Enclosed within the columns is a work table 3. In the long direction of the apparatus a supporting beam 4 has been provided at both ends. These supporting beams are suspended on vertical carrier heads 5 which can be moved along the columns 2. Each of the carrier heads 5 is connected through a chain 6 and a sheave 7 with a counterweight 8. The load of this counterweight 8 is chosen such that it virtually compensates the load of the framework with supporting beams and any other components fitted to it weighing on each carrier head 5. Each of the carrier heads 5 can be displaced in a vertical direction by driving means - not shown in the drawings - moving synchronously for each carrier head, such as a screw spindle with nut. All these driving means are linked together for the four columns by means of drive shafts 9 and 10 in the longitudinal and crosswise direction, respectively.
  • a drive motor is denoted by 11. Obviously, more drive motors may be applied, provided a vertically uniform displacement of the carrier heads is ensured.
  • the columns are connected together at the top by means of structural shapes 12 and 13, respectively.
  • Each of the supporting beams 4 is provided at the location of a vertical column 2 facing the carrier head with a coupling flange 14 for the attachment of the U-shaped framework to be discussed below.
  • a screw spindle 15 with driving motor 16 has been mounted underneath the work table 3. This screw spindle meshes with a nut incorporated into a support 17 underneath the work table 3.
  • the motor 16 enables the work table 3 to be moved to and fro over a distance of about two metres.
  • the left-hand portion of the work table in Figure 1 is provided wtih a number of rollers 20 which allow of telescopic movement relative to a stationary supply conveyor 21.
  • the work table 3 terminates above a delivery conveyor 22.
  • a combined drive through the motors 11 and 16 any desired movement can be realized of the work table 3 in a horizontal direction and of the supporting beams 4 with the parts mounted in between to be described hereinafter in a vertical direction.
  • these drives may be operated under numerical control.
  • Figure 3 is a top view of a substantially U-shaped frame consisting of two longitudinal bars 30 connected by a cross bar 31.
  • Each bar 30 is provided with two coupling flanges 32 to permit mounting between the supporting beams 4 by means of the coupling flanges 14 mounted thereon.
  • the longitudinal bars 30 are of the box type and each provided with a fan with motor 33 for the supply of cooling air to each bar 30.
  • a rocker arm 35 At the side of each bar 30 a rocker arm 35 has been fitted. The rocker arms 35 move synchronously in opposite directions.
  • a support 36 is provided for tension bars 37.
  • a filament 40, a tension spring 41 and two terminal pull cables 42, 43 are invariably mounted between the two tension bars (see figure 6).
  • the tension spring 41 As the bars 37 move away from one another, the increased distance will be accommodated by an elongation of the tension spring 41. In the embodiment according to figure 6, the bottommost filament 40 will then move to the left. A large number of wires, say 50, have been stretched between the two rocker arms 35 in the manner indicated, such that the tension spring 41 is alternately attached to either one of the tension bars. In consequence, when the tension bars 37 move outwards, one half of the filaments 40 travel to the left and the other half of the filaments to the right, and when the tension bars move back inwards these filaments will each travel in opposite direction.
  • the hollow bar is provided with discharge openings 45. Cold air supplied flows through these openings and thereby cools the part of the filaments 40 that projects from a block 46 to be cut.
  • a lever 50 On the end of the rocker arms 35 that is located near the cross bar 31 a lever 50 has been mounted. The tip of this lever rests at 51 on an eccentric 52 which forms part of a short axle provided with a gear wheel 53.
  • the two gear wheels 53 are interconnected by a rubber driving belt 54 which is provided with an internal toothing and which is held under initial tension by means of a movable thrust collar 55.
  • the eccentric shaft mounted on the right-end side in Figure 4 is driven by a motor 56 (see also Figure 3).
  • a synchronous displacement of the two rocker arms is accomplished by the use of a toothed belt.
  • the initial tension of the several springs 41 ensures that the levers 50 continuously lie against the eccentric 52.
  • the work table is designed for receiving a block of starting material at least four metres long. It is also possible to process blocks of starting material twelve metres long by running such blocks through the apparatus in three passes.
  • the block of starting material can be pushed on to position 60, it being understood that its front will have been profiled in accordance with the contours of the cut products, and subsequently a corresponding number of products can be cut by a substantially upward movement of the U-shaped frame, to be followed by a third series of products made from the block of starting material.
  • oscillating contour cutting can be practised not only on thermoplastic synthetics such as polystyrene foam, but also on rigid foam material such as polyurethane.
  • the surface so obtained is smooth and comparable to that produced by mechanical sawing, but without any sawdust being formed.
  • Cutting according to the invention involves a material loss of at most 1 mm, whilst the cutting speed attainable for, say, rigid polystyrene foam may be as much as four metres per minute.
  • the temperature of the filament is set to a value of 80 to 90 °C, but, depending on the resistance of the material to be cut, a higher equilibrium temperature may be reached on account of the friction.
  • An effective straight cut proves to be feasible at an average initial tension of the filaments of 10 kg.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (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)
  • Details Of Cutting Devices (AREA)
EP83200884A 1982-06-16 1983-06-16 Verfahren und Vorrichtung zum Konturschneiden von Kunststoffprodukten Expired EP0097992B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83200884T ATE24682T1 (de) 1982-06-16 1983-06-16 Verfahren und vorrichtung zum konturschneiden von kunststoffprodukten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8202437A NL8202437A (nl) 1982-06-16 1982-06-16 Werkwijze en inrichting voor het contoursnijden van kunststof produkten, en verbeterde contourgesneden produkten.
NL8202437 1982-06-16

Publications (2)

Publication Number Publication Date
EP0097992A1 true EP0097992A1 (de) 1984-01-11
EP0097992B1 EP0097992B1 (de) 1987-01-07

Family

ID=19839892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83200884A Expired EP0097992B1 (de) 1982-06-16 1983-06-16 Verfahren und Vorrichtung zum Konturschneiden von Kunststoffprodukten

Country Status (4)

Country Link
EP (1) EP0097992B1 (de)
AT (1) ATE24682T1 (de)
DE (1) DE3368888D1 (de)
NL (1) NL8202437A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195470A1 (de) * 1985-02-25 1986-09-24 Gebr. van Dijk B.V. Verfahren und Vorrichtung zum Formschneiden
EP0468858A1 (de) * 1990-07-27 1992-01-29 Croma Sarl Verfahren und Vorrichtung zum Schneiden von Blöcken und Platten aus expandierten synthetischen Werkstoffen
WO1995034354A1 (en) * 1994-06-16 1995-12-21 Giovanni Lavermicocca Three-dimensional puzzles
EP0933171A2 (de) * 1998-01-30 1999-08-04 Kurtz Altaussee GmbH Schneidvorrichtung mit oszillierenden Schneiddrähten
US5950512A (en) * 1996-10-11 1999-09-14 Gary D. Fields Apparatus to make building blocks for blockwork domed structures, and method and domed structure
FR2787376A1 (fr) * 1998-12-22 2000-06-23 Esox Procede et installation de decoupe de pieces de forme quelconque
ITVR20120072A1 (it) * 2012-04-13 2013-10-14 Oms Automation S R L Dispositivo di taglio di elementi lastriformi per la produzione di pannelli in materiale plastico espanso
CN115194892A (zh) * 2022-07-28 2022-10-18 无锡焙斯机械有限公司 一种黄油切割机

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089526A (en) * 1960-06-23 1963-05-14 Lykkeberg Alfred Machine for slicing meat
FR1355283A (fr) * 1963-04-29 1964-03-13 Simoniz Co Machine à découper
BE754761A (en) * 1970-08-12 1971-01-18 Vossen Claude Slicing meat
FR2261859A1 (de) * 1974-02-27 1975-09-19 Treffner Peter
EP0003167A1 (de) * 1978-01-09 1979-07-25 Peter Treffner Schneidmaschine mit mehreren Schneidwerkzeugen
US4175455A (en) * 1978-03-22 1979-11-27 Mcneil Corporation Travelling cut-off saw
EP0035852A2 (de) * 1980-02-27 1981-09-16 J. MacA. King & Co., Limited Formschneidevorrichtungen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786701A (en) * 1971-11-05 1974-01-22 E Ludwig Device for cutting urethane foam

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089526A (en) * 1960-06-23 1963-05-14 Lykkeberg Alfred Machine for slicing meat
FR1355283A (fr) * 1963-04-29 1964-03-13 Simoniz Co Machine à découper
BE754761A (en) * 1970-08-12 1971-01-18 Vossen Claude Slicing meat
FR2261859A1 (de) * 1974-02-27 1975-09-19 Treffner Peter
EP0003167A1 (de) * 1978-01-09 1979-07-25 Peter Treffner Schneidmaschine mit mehreren Schneidwerkzeugen
US4175455A (en) * 1978-03-22 1979-11-27 Mcneil Corporation Travelling cut-off saw
EP0035852A2 (de) * 1980-02-27 1981-09-16 J. MacA. King & Co., Limited Formschneidevorrichtungen

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195470A1 (de) * 1985-02-25 1986-09-24 Gebr. van Dijk B.V. Verfahren und Vorrichtung zum Formschneiden
EP0468858A1 (de) * 1990-07-27 1992-01-29 Croma Sarl Verfahren und Vorrichtung zum Schneiden von Blöcken und Platten aus expandierten synthetischen Werkstoffen
FR2665100A1 (fr) * 1990-07-27 1992-01-31 Croma Sarl Procede et appareil pour couper des blocs et des plaques de materiaux synthetiques cellulaires.
GB2303797B (en) * 1994-06-16 1998-12-02 Giovanni Lavermicocca Three dimensional puzzles
GB2303797A (en) * 1994-06-16 1997-03-05 Giovanni Lavermicocca Three dimensional puzzles
US5826873A (en) * 1994-06-16 1998-10-27 Interlock Marketing Pty. Ltd. Three dimensional puzzles
WO1995034354A1 (en) * 1994-06-16 1995-12-21 Giovanni Lavermicocca Three-dimensional puzzles
US5950512A (en) * 1996-10-11 1999-09-14 Gary D. Fields Apparatus to make building blocks for blockwork domed structures, and method and domed structure
EP0933171A2 (de) * 1998-01-30 1999-08-04 Kurtz Altaussee GmbH Schneidvorrichtung mit oszillierenden Schneiddrähten
EP0933171A3 (de) * 1998-01-30 2000-08-30 Kurtz Altaussee GmbH Schneidvorrichtung mit oszillierenden Schneiddrähten
FR2787376A1 (fr) * 1998-12-22 2000-06-23 Esox Procede et installation de decoupe de pieces de forme quelconque
ITVR20120072A1 (it) * 2012-04-13 2013-10-14 Oms Automation S R L Dispositivo di taglio di elementi lastriformi per la produzione di pannelli in materiale plastico espanso
CN115194892A (zh) * 2022-07-28 2022-10-18 无锡焙斯机械有限公司 一种黄油切割机
CN115194892B (zh) * 2022-07-28 2023-11-28 无锡焙斯机械有限公司 一种黄油切割机

Also Published As

Publication number Publication date
EP0097992B1 (de) 1987-01-07
DE3368888D1 (en) 1987-02-12
NL8202437A (nl) 1984-01-16
ATE24682T1 (de) 1987-01-15

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