WO1985000303A1 - Cutting tool, especially for the cutting of discarded cable - Google Patents

Cutting tool, especially for the cutting of discarded cable Download PDF

Info

Publication number
WO1985000303A1
WO1985000303A1 PCT/DK1984/000064 DK8400064W WO8500303A1 WO 1985000303 A1 WO1985000303 A1 WO 1985000303A1 DK 8400064 W DK8400064 W DK 8400064W WO 8500303 A1 WO8500303 A1 WO 8500303A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
cutting
knife
shaft
cutting tool
Prior art date
Application number
PCT/DK1984/000064
Other languages
French (fr)
Inventor
Aage Christensen
Original Assignee
E.L.M. Faaborg A/S
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 E.L.M. Faaborg A/S filed Critical E.L.M. Faaborg A/S
Publication of WO1985000303A1 publication Critical patent/WO1985000303A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B15/00—Apparatus or processes for salvaging material from cables
    • H01B15/005—Apparatus or processes for salvaging material from cables by cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B02C18/145—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with knives spaced axially and circumferentially on the periphery of a cylindrical rotor unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F11/00—Cutting wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D25/00—Machines or arrangements for shearing stock while the latter is travelling otherwise than in the direction of the cut
    • B23D25/14—Machines or arrangements for shearing stock while the latter is travelling otherwise than in the direction of the cut without regard to the exact dimensions of the resulting material, e.g. for cutting-up scrap
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/82—Recycling of waste of electrical or electronic equipment [WEEE]

Definitions

  • the invention relates to a cutting tool for cutting discarded cables and wires comprising a rotating -cutting means and a bottom blade co-operating with said cutting means.
  • Wires and cables can be constructed in many different ways, but it is a common feature that each conductor is insulated. To facilitate a rational recycling of the copper from discarded cables it is thus necessary that this insulation, primarily made of plastics, can be removed in an inexpensive and rational way.
  • the object of the present invention is to provide a cutting tool without the above disadvantages, as the cutting tool according to the present invention
  • OMPI IPO can cut up discarded cable with lower energy con ⁇ sumption than any hitherto known tools.
  • the rotating cutting tool comprises one or more plate shaped, projecting knife blades being secured to a rotating shaft or drum in such a manner that the plane formed by each knife blade when the knife blade is in a position parallel to the bottom blade before the cutting takes place, is staggered parallel to the plane formed by the bottom blade in the direction towards the direction of motion of the knife blade.
  • the projecting knife blade or blades can be made very strong, and as the knife blade is staggered in rela ⁇ tion to the bottom blade, the cutting of the discard ⁇ ed cable will take place as a smooth cut which does not require high energy consumption.
  • the material is carried by a feeding device towards the knife. Mate- rial which may fall through the openings of the edge of the bottom blade is already of a length suitable for further processing. Furthermore, the discarded cable is safely secured during the cutting as the knife blade moving from above secures that discarded cable is not pressed to the sides during the cutting.
  • the cutting tool is constructed with knife blades with one and one only front part with a maximum distance to the periphery of the shaft, and the cut- ting edges of each knife blade run evenly towards the shaft from this part, a cutting with even less energy consumption can take place, as the immediate cutting points will be displaced along the cutting edge during the cutting. Thus no large amounts of cable are to be cut at the same time.
  • a cutting tool according to the invention may, more- over, as dealt with in claims 7 and 8, be characte ⁇ ristic in that the knife blades can be released from their attachment to e.g. a back. It is expedient that individual knife blades may be replaced in case of damage. A back behind the knife blades will support this efficiently and provide a safe cut and at the same time provide a good attachment for the knife blade.
  • fig. 1 shows a cutting tool according to the invention with a feeding device and control means
  • OMPI fig. 2 shows a shaft with knife blades accord ⁇ ing to the invention
  • fig. 3 shows a section of a shaft with a knife blade according to the invention, seen from the front on a larger scale, and
  • a cutting tool according to the invention with reference number 1 is shown.
  • Discarded cable can be fed through a funnel 2 and drops on a plate 3 in a feeding device where carrier teeth carry the cable- forwards for being cut.
  • the one end of the plate 3 is designed as a bottom blade 7 having triangular cutouts from its edge.
  • the cutting tool has triangular knife blades situated on a rotating shaft 4.
  • the whole cutting tool 1 is driven by a motor 5 . e.g. by belt or chain drive. After the cutting the cut pieces of cable are removed by a conveyor belt 6 or the like.
  • a shaft 4 with knife blades 8 ac ⁇ cording to the invention In fig. 2 is shown a shaft 4 with knife blades 8 ac ⁇ cording to the invention.
  • the knife blades are flat plate shaped parts, e.g. made of iron plate and pro- jecting from the periphery of the shaft 4.
  • To the rear the knife blades 8 are supported by a back 9 which e.g. by welding is secured to the shaft 4.
  • the knife blades 8 may be secured to the back 9 or the shaft 4 in any known way, e.g. by means of screws or bolts, but it is expedient if the assembly can be disassembled to facilitate replacement of one or more of the knife blades
  • the knife blades 8 are placed in continuation of each other in the longitudinal direction of the shaft 4.
  • the knife blades 8 are distributed along the periphery of the shaft 4 in order that only one or perhaps two knife blades 8 cut simultaneously. This evens the load of the motor as this need not have a capacity for more than one cut.
  • the knife blades should be e.g. triangular or tongue shaped in order that the cutting points, when a knife blade 8 passes the bottom blade 7, are staggered from the point of the knife blade 8 towards the shaft 4.
  • discarded cable is cut through without being pressed to the sides, and a very clean cut is achiev ⁇ ed.
  • This cut requires considerably lower effect than if the discarded cable e.g. were to be torn or beaten to pieces.
  • bottom blade 7 must be con ⁇ structed to fit the shape and size of the knife blade 8 exactly.
  • the bottom blade 7 must be con ⁇ structed to fit the shape and size of the knife blade 8 exactly.
  • a cutting tool according to the invention may be constructed in various ways as to the shape of the knife blades 8 and the bottom blade 7.
  • the cutting tool may also be applied for cutting other material than discarded cable, which may involve other re ⁇ quirements concerning choice of material and con ⁇ struction.
  • the number of knife blades will de- pend on the use, but often six to ten and preferably eight knife blades will be ideal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Removal Of Insulation Or Armoring From Wires Or Cables (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

Cutting tool (1), especially suitable for the cutting of discarded cable with an aim to recycle copper, comprising a rotating shaft (4) with projecting knife blades (8) co-operating with a bottom blade (7) for cutting discarded cable to pieces, wherein said discarded cable is fed to a feeding device with a carrier plate (3) through a funnel (2). Each knife blade is placed in a plane which, in a position where the knife blade is parallel to the bottom blade (7), is staggered parallel to said bottom blade. Thus a good, efficient cutting of discarded cable with comparatively low energy consumption is achieved.

Description

CUTTING TOOL, ESPECIALLY FOR THE CUTTING OP DISCARDED CABLE.
The invention relates to a cutting tool for cutting discarded cables and wires comprising a rotating -cutting means and a bottom blade co-operating with said cutting means.
Almost all electric wires and cables contain copper, this metal having a high degree of conductivity. How¬ ever, copper is fairly expensive, and thus it is very advantageous to recycle copper from discarded wires and cables.
Wires and cables can be constructed in many different ways, but it is a common feature that each conductor is insulated. To facilitate a rational recycling of the copper from discarded cables it is thus necessary that this insulation, primarily made of plastics, can be removed in an inexpensive and rational way.
Apparatuses for this purpose are known, but these necessitate that the discarded cables are fed in small lengths, e.g. 5-20 cm.
Pur such a cutting of discarded cables various kinds of rasps and the like are known, but all of these have very high energy consumption,the discarded cables often being torn or beaten to pieces.
The object of the present invention is to provide a cutting tool without the above disadvantages, as the cutting tool according to the present invention
OMPI IPO can cut up discarded cable with lower energy con¬ sumption than any hitherto known tools.
This object is achieved if the rotating cutting tool comprises one or more plate shaped, projecting knife blades being secured to a rotating shaft or drum in such a manner that the plane formed by each knife blade when the knife blade is in a position parallel to the bottom blade before the cutting takes place, is staggered parallel to the plane formed by the bottom blade in the direction towards the direction of motion of the knife blade.
The projecting knife blade or blades can be made very strong, and as the knife blade is staggered in rela¬ tion to the bottom blade, the cutting of the discard¬ ed cable will take place as a smooth cut which does not require high energy consumption. The material is carried by a feeding device towards the knife. Mate- rial which may fall through the openings of the edge of the bottom blade is already of a length suitable for further processing. Furthermore, the discarded cable is safely secured during the cutting as the knife blade moving from above secures that discarded cable is not pressed to the sides during the cutting.
If the cutting tool is constructed with knife blades with one and one only front part with a maximum distance to the periphery of the shaft, and the cut- ting edges of each knife blade run evenly towards the shaft from this part, a cutting with even less energy consumption can take place, as the immediate cutting points will be displaced along the cutting edge during the cutting. Thus no large amounts of cable are to be cut at the same time.
OMPI If triangular knife blades are applied, as referred to in claim 3, a strong knife is achieved which is easy to manufacture and which gives a smooth and clean cut. Furthermore, this clean cut helps to make the blades more durable.
If the axis of rotation of the shaft is in the plane formed by the bottom blade a simple and expedient construction of the tool is achieved.
It is expedient, as mentioned in claim 5, to place the knife blades in continuation of each other thus forming one long connected cutting edge, and if, as dealt with in claim β, the knife blades are distri¬ buted along the periphery of the shaft, an even load of the motor is achieved, as only one or a few- of the knifes cut simultaneously.
A cutting tool according to the invention may, more- over, as dealt with in claims 7 and 8, be characte¬ ristic in that the knife blades can be released from their attachment to e.g. a back. It is expedient that individual knife blades may be replaced in case of damage. A back behind the knife blades will support this efficiently and provide a safe cut and at the same time provide a good attachment for the knife blade.
In the following the invention will be described in more- detail with reference to the drawing, where
fig. 1 shows a cutting tool according to the invention with a feeding device and control means,
OMPI fig. 2 shows a shaft with knife blades accord¬ ing to the invention,
fig. 3 shows a section of a shaft with a knife blade according to the invention, seen from the front on a larger scale, and
fig. 4 shows a section through the shaft as in fig. 3_ seen in the direction of the arrows along the line IV-IV.
In fig. 1 a cutting tool according to the invention with reference number 1 is shown. Discarded cable can be fed through a funnel 2 and drops on a plate 3 in a feeding device where carrier teeth carry the cable- forwards for being cut. The one end of the plate 3 is designed as a bottom blade 7 having triangular cutouts from its edge.
Corresponding to these cutouts the cutting tool has triangular knife blades situated on a rotating shaft 4. The whole cutting tool 1 is driven by a motor 5. e.g. by belt or chain drive. After the cutting the cut pieces of cable are removed by a conveyor belt 6 or the like.
In fig. 2 is shown a shaft 4 with knife blades 8 ac¬ cording to the invention. The knife blades are flat plate shaped parts, e.g. made of iron plate and pro- jecting from the periphery of the shaft 4. To the rear the knife blades 8 are supported by a back 9 which e.g. by welding is secured to the shaft 4. The knife blades 8 may be secured to the back 9 or the shaft 4 in any known way, e.g. by means of screws or bolts, but it is expedient if the assembly can be disassembled to facilitate replacement of one or more of the knife blades
In fig. 3 and 4 details of the knife blades 8 are shown on a larger scale, and it is seen how the plane of the knife blades is staggered in relation to the plane of the bottom blade 7.
As appears from particularly fig. 2 the knife blades 8 are placed in continuation of each other in the longitudinal direction of the shaft 4. Thus it be¬ comes possible to make a knife with large capacity. It is expedient if the knife blades 8 are distributed along the periphery of the shaft 4 in order that only one or perhaps two knife blades 8 cut simultaneously. This evens the load of the motor as this need not have a capacity for more than one cut.
If each knife blade 8 is to cut at two points only at a time, the knife blades should be e.g. triangular or tongue shaped in order that the cutting points, when a knife blade 8 passes the bottom blade 7, are staggered from the point of the knife blade 8 towards the shaft 4. Thus it is moreover achieved that discarded cable is cut through without being pressed to the sides, and a very clean cut is achiev¬ ed. This cut requires considerably lower effect than if the discarded cable e.g. were to be torn or beaten to pieces.
It is obvious that the bottom blade 7 must be con¬ structed to fit the shape and size of the knife blade 8 exactly. Like the knife blades 8 the bottom
OMPI blade 7 can ideally be made of iron plate.
A cutting tool according to the invention may be constructed in various ways as to the shape of the knife blades 8 and the bottom blade 7. The cutting tool may also be applied for cutting other material than discarded cable, which may involve other re¬ quirements concerning choice of material and con¬ struction. Also the number of knife blades will de- pend on the use, but often six to ten and preferably eight knife blades will be ideal.

Claims

C L A I M S
1. Cutting tool, especially for cutting discarded cables and wires, comprising a rotating cutting means and a bottom blade co-operating with said cut¬ ting means, c h a r a c t e r i z e d in that the rotating cutting means comprises one or several plate shaped, projecting knife blades (8) being se¬ cured to a rotating shaft (4) or drum in such a man¬ ner that the plane formed by each knife blade (8) when the knife blade (8) is in a position parallel to the bottom blade (7) before the cutting takes place, is staggered parallel to the plane formed by the bot¬ tom blade (7) in the direction towards the direction of motion of the knife blade (8).
2. Cutting tool accordin to claim 1, c h a r a c - t e r i z e d in that each knife blade (8) has one and one only front part with maximum distance to the periphery of the shaft (4), and in that the cutting edges of the blade (8) from this part run evenly towards the shaft (4).
3. Cutting tool according to claim 2, c h a r a c ¬ t e r i z e d in that each knife blade (8) is tri¬ angular.
4. Cutting tool according to claims 1 - 3. c h a - r a c t e r i z e d in that the axis of rotation of the shaft (4) is situated in the plane formed by the bottom blade' (7).
5. Cutting tool according to claims 1 - 4, and where several knife blades are applied, c h a r a c t e -
- iSΕE
OMPI WIPO r i z e d in that the knife blades (8) are placed in immediate continuation of each other in the longitu¬ dinal direction of the shaft (4).
6. Cutting tool according to claims 1 - 5. and where several knife blades are applied, c h a r a c t e ¬ r i z e d in that the knife blades (8) are distri¬ buted over the periphery of the shaft (4), preferably in order to allow equal arc lengths between the knife blades (8).
7. Cutting tool according to claims 1 - 6, c h a ¬ r a c t e r i z e d in that each knife blade (8) is secured in a way that allows it to be released from its attachment.
8. Cutting tool according to claims 1 - J, c h a - r a c t e r i z e d in that a back (9) is placed behind each knife blade (8) extending to the rear in the direction of rotation from the knife blade (8) along the periphery of the shaft (4), and in that the back (9) is secured to the shaft (4), e.g. by welding.
OMPI
PCT/DK1984/000064 1983-07-06 1984-07-02 Cutting tool, especially for the cutting of discarded cable WO1985000303A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK311783A DK311783A (en) 1983-07-06 1983-07-06 CUTTING MACHINE, SPECIFICALLY FOR CUTTING WIRE
DK3117/83 1983-07-06

Publications (1)

Publication Number Publication Date
WO1985000303A1 true WO1985000303A1 (en) 1985-01-31

Family

ID=8119288

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1984/000064 WO1985000303A1 (en) 1983-07-06 1984-07-02 Cutting tool, especially for the cutting of discarded cable

Country Status (4)

Country Link
EP (1) EP0149633A1 (en)
DK (1) DK311783A (en)
FR (1) FR2548567A1 (en)
WO (1) WO1985000303A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993013860A1 (en) * 1992-01-15 1993-07-22 Gross, Stefan Chopping device, and a chopper blade for such a device
CN110788253A (en) * 2019-11-08 2020-02-14 国网河南省电力公司偃师市供电公司 Cable ration cutting device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3545686A (en) * 1968-03-15 1970-12-08 Du Pont Shredder
GB1356529A (en) * 1971-11-19 1974-06-12 Cumberland Eng Co Machine for cutting synthetic resin sheet material
DE2332060B2 (en) * 1973-06-23 1975-06-26 Alpine Ag, 8900 Augsburg Pre-shredder for lead frame waste
GB1403825A (en) * 1972-10-16 1975-08-28 Cumberland Eng Co Knife holder and knife for a cutting machine
SU676319A1 (en) * 1978-03-31 1979-07-30 С. П. Петров Method of processing scrap and waste of polymer-insulated conductors
WO1982002348A1 (en) * 1981-01-05 1982-07-22 Electric Co Western Process for reclaiming jelly-filled telecommunication cables

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3545686A (en) * 1968-03-15 1970-12-08 Du Pont Shredder
GB1356529A (en) * 1971-11-19 1974-06-12 Cumberland Eng Co Machine for cutting synthetic resin sheet material
GB1403825A (en) * 1972-10-16 1975-08-28 Cumberland Eng Co Knife holder and knife for a cutting machine
DE2332060B2 (en) * 1973-06-23 1975-06-26 Alpine Ag, 8900 Augsburg Pre-shredder for lead frame waste
SU676319A1 (en) * 1978-03-31 1979-07-30 С. П. Петров Method of processing scrap and waste of polymer-insulated conductors
WO1982002348A1 (en) * 1981-01-05 1982-07-22 Electric Co Western Process for reclaiming jelly-filled telecommunication cables

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993013860A1 (en) * 1992-01-15 1993-07-22 Gross, Stefan Chopping device, and a chopper blade for such a device
CN110788253A (en) * 2019-11-08 2020-02-14 国网河南省电力公司偃师市供电公司 Cable ration cutting device

Also Published As

Publication number Publication date
DK311783A (en) 1985-01-07
DK311783D0 (en) 1983-07-06
FR2548567A1 (en) 1985-01-11
EP0149633A1 (en) 1985-07-31

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