WO2000032506A1 - Winding and packaging of flexible initiating cord - Google Patents
Winding and packaging of flexible initiating cord Download PDFInfo
- Publication number
- WO2000032506A1 WO2000032506A1 PCT/AU1999/001072 AU9901072W WO0032506A1 WO 2000032506 A1 WO2000032506 A1 WO 2000032506A1 AU 9901072 W AU9901072 W AU 9901072W WO 0032506 A1 WO0032506 A1 WO 0032506A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flexible
- initiating cord
- cord
- initiating
- coiled
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H55/00—Wound packages of filamentary material
- B65H55/04—Wound packages of filamentary material characterised by method of winding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B39/00—Packaging or storage of ammunition or explosive charges; Safety features thereof; Cartridge belts or bags
- F42B39/30—Containers for detonators or fuzes
Definitions
- the present invention relates to winding and packaging flexible initiating cord for the detonation of explosive charges.
- the present invention relates to a flexible initiating cord wound in a comparatively tangle free configuration as well as to a process and an apparatus for winding a flexible initiating cord such that the flexible cord is in a condition for ready deployment.
- initiation systems In blasting operations, initiation systems rely on an interconnected network of detonators, timing elements and the like. These elements are generally interconnected by flexible cords for transmitting signals between the various elements.
- flexible cords In order to facilitate deployment of these flexible cords a variety of packaging systems have been used.
- Figure of 8 winding has been employed in the packaging of initiation cords.
- Such winding configurations seek to provide tangle-free deployment of the flexible cord.
- a variety of variations on this configuration such as have been described in Australian Patent Application No. 15097/92 (the so called "Figure 80" configuration), have been proposed.
- these tangle-free winding configurations are produced by winding the flexible cord around two offset winding supports.
- the wound configuration of the flexible cord is then held in place by one or more frangible paper binders.
- the winding of cords about off-set winding supports generally requires the use of winding equipment which can perform complex movement in order to achieve an automated process.
- the present invention also provides a number of novel configurations of flexible initiating cord which are comparatively tangle-free.
- a coiled flexible initiating cord comprising a leading end and a coiled portion formed by a plurality of successive coils of the flexible initiating cord, wherein two or more of the successive coils are located on opposite sides of the leading end of the flexible initiating cord, and wherein said coiled cord further comprises a coil retainer for holding the plurality of successive coils in a coiled configuration.
- an apparatus for producing a coiled flexible initiating cord comprising a winding support, having means located in a central portion thereof for releasably engaging a leading end of the flexible initiating cord, said apparatus further comprising a means for winding a plurality of successive coils of the flexible initiating cord relatively around the winding support such that two or more of the successive coils of the flexible initiating cord are wound on opposite sides of the leading end of the flexible initiating cord and said winding apparatus further comprising means for applying a coil retainer means for holding the plurality of successive coils in coiled configuration.
- a wide variety of flexible initiating cords for use in the initiation of explosives may be wound in accordance with the present invention.
- the present invention may be used to wind electrical initiating cord, detonating cord, igniter cord, non-electric shock tube, hybrid cords and the like.
- the present invention is particularly suited to the winding of the non-electric shock tube.
- Explosive initiation systems incorporate a plurality of detonators interconnected via a network of flexible initiation cords.
- the initiation cords may be interconnected by a variety of connector means.
- the flexible initiation cords are provided with connectors and/or detonators affixed thereto.
- Flexible initiation cords generally are provided in three configurations.
- the first configuration comprises a detonator affixed to one end and a connector, of the "J-hook" type at the other.
- a second configuration comprises a detonator at both ends, with one of these detonators located within a connector block.
- the third configuration comprises a connector, such as of the "J- hook” type at one end and a detonator encased in a connector block at the other.
- two or more successive coils of the flexible initiating cord are located on the opposite sides of the leading end of the flexible initiating cord. It is preferred that 3 or more successive coils are located on alternating sides of the leading end, more preferably 4 or more successive coils are located on alternating sides of the leading end. In the most preferred winding configuration all of the plurality of successive coils are located on the alternating sides of the leading end of the flexible initiating cord. However, it is not essential to the present invention that every successive coil is located on the alternating sides of the leading end and it is possible that the coil of flexible initiating cord comprises two successive coils on one side of the leading end of the flexible initiating cord followed by a further two successive coils on the other side. Various modifications and variations of the winding scheme will be acceptable. For example, we have found that six successive coils on one side of the leading end prior to alternating to the other side will still give acceptable, tangle free deployment.
- the coil of flexible initiating cord may be packaged by a coil retainer such as generic taping (paper taping) of the type currently used for retaining coiled non-electric shock tube.
- a coil retainer such as generic taping (paper taping) of the type currently used for retaining coiled non-electric shock tube.
- the coil of flexible initiating cord may be packaged using shrink- wrap packaging or a band covering the central portion of the coil.
- Winding supports may be in the form of winding frames comprising 2 or more members, although it is preferred that the winding support for use in the present invention is in the form of a spool, reel, spindle or the like.
- winding supports will be referred to herein generically by the term "spool".
- the winding support must be constructed such that the wound cord may be removed from the winding support, such as for packaging and/or distribution.
- the winding support may be provided with a removable flange such that the coiled cord may be disengaged from the winding support in a coiled configuration.
- the winding support comprises a fastening means for holding the leading end of the flexible initiating cord.
- the fastening means is located such that windings of the flexible initiating cord may be accommodated on either side of the leading end of the flexible initiating cord.
- the preferred fastening means is a channel provided with overhanging tabs to releasably engage the flexible initiating cord.
- the winding support is a bifurcated spool.
- the bifurcated spool is divided in a central portion thereof and the leading edge of the flexible initiating cord is releasably engaged with the winding support by moving two parts of the bifurcated spool relatively towards each other.
- the flexible initiating cord may be wound around the spool by either rotating the spool or by circulating a reel of flexible initiating cord about the spool.
- the coil of flexible initiating cord may be removed from the spool for packaging by any convenient means.
- the winding support is provided with a longitudinal channel such that a tape or gripping means may be passed therethrough and under the coiled cord whereby the cord may be taped in situ or gripped for removal from the spool.
- Coiled non-electric shock tube produced according to the present invention may be affixed to detonators, connector blocks and/or connectors such as J-hooks and the like.
- the flexible initiating cord may be deployed in a comparatively tangle free manner by uncoiling the coil of flexible cord from the leading end of flexible initiating cord. By withdrawing the leading end of the flexible initiating cord, the successive coils adjacent to, and alternating on either side of, the leading end may be successively deployed.
- FIGS. 1 to 5 illustrate a preferred winding arrangement according to the present invention.
- Figure 6 is a cross-section of a spool wound in accordance with the present invention.
- Figure 7 is a perspective diagram of a spool wound in accordance with the present invention.
- Figure 8 is a perspective diagram of one segment of a bi-partied spool in accordance with the present invention.
- Figure 1 shows the beginning of the flexible initiating cord (1 ) has a leading end (2).
- Figure 2 shows the winding advanced approximately one revolution.
- the initiating cord (1 ) can be seen to pass over the leading end (2) at intersection (3).
- the winding passes underneath the leading end (2) at intersection (4).
- Figure 3 shows the winding advanced a further revolution.
- the flexible initiating cord (1 ) passes under the leading end (2) at intersection (5) and over the leading end (2) at intersection (6).
- Figure 4 shows the winding advanced a further revolution.
- the flexible initiating cord (1) passes over the leading end (2) at intersection (7) and under the leading end (2) at intersection (8).
- Figure (5) shows the winding advanced a further revolution.
- the flexible initiating cord (1 ) passes under the leading end (2) at intersection (9) and over the leading end of the flexible cord at intersection (10).
- the preferred embodiment of the present invention represented in figures 1 to 5 may be continued with subsequent revolution alternating between either side of leading end of the flexible cord (2).
- Figure 6 shows the spool (11 ) having a channel (12) through which the leading end (2) of the flexible initiating cord (1 ) is passed.
- the windings (13) are wound in an alternating manner on either side of the leading end (2).
- the windings are wound about the drum portion (19) of the spool (11).
- a flange (18) retains the windings (13).
- Figure 7 shows the spool (11 ) having the flexible initiating cord (1 ) wound thereon.
- the flexible initiating cord (1 ) is wound alternately about the leading end (2) of the flexible initiating cord (1 ).
- the flanges of the spool (18) have a channel (14) therein.
- the channel (14) extends below the surface of the drum portion (not shown) and extends longitudinally along the drum portion to provide a channel (15) below the windings (13).
- the channel (15) allows the windings (13) to be conveniently gripped and/or taped for packaging.
- Figure 8 shows one section of a bifurcated spool (16).
- the second element (not shown) may be a mirror image of the first element (16) or may be any other convenient configuration.
- the first element of the bifurcated spool has a flange (18) for retaining the windings (not shown) on the surface of the drum (19).
- the inner end (20) of the first element (16) has a channel (17) for receiving the flexible cord (not shown).
- the second element of the bi-partite spool may engage the first to provide an interference fit for the flexible cord (not shown) in the channel (17) with an opposing channel in the second element (not shown).
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU17614/00A AU757394B2 (en) | 1998-12-03 | 1999-12-03 | Winding and packaging of flexible initiating cord |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPP7480 | 1998-12-03 | ||
AUPP7480A AUPP748098A0 (en) | 1998-12-03 | 1998-12-03 | Winding and packaging of flexible cord |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000032506A1 true WO2000032506A1 (en) | 2000-06-08 |
Family
ID=3811689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1999/001072 WO2000032506A1 (en) | 1998-12-03 | 1999-12-03 | Winding and packaging of flexible initiating cord |
Country Status (2)
Country | Link |
---|---|
AU (1) | AUPP748098A0 (en) |
WO (1) | WO2000032506A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015036919A1 (en) * | 2013-09-12 | 2015-03-19 | Ael Mining Services Limited | Handling of shock tube |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115096149B (en) * | 2022-08-09 | 2024-04-19 | 重庆交通大学 | Automatic belt winding device for explosive package manufacturing |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4455961A (en) * | 1982-06-25 | 1984-06-26 | The United States Of America As Represented By The Secretary Of The Navy | Overboarding fixture |
US5129514A (en) * | 1991-08-12 | 1992-07-14 | The Ensign-Bickford Company | Flexible cord winding and packaging configuration and method for making such package |
US5238200A (en) * | 1991-07-18 | 1993-08-24 | Robert Ritzenthaler | Power driven winding device with spool axially movable to engage a clutch |
-
1998
- 1998-12-03 AU AUPP7480A patent/AUPP748098A0/en not_active Abandoned
-
1999
- 1999-12-03 WO PCT/AU1999/001072 patent/WO2000032506A1/en active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4455961A (en) * | 1982-06-25 | 1984-06-26 | The United States Of America As Represented By The Secretary Of The Navy | Overboarding fixture |
US5238200A (en) * | 1991-07-18 | 1993-08-24 | Robert Ritzenthaler | Power driven winding device with spool axially movable to engage a clutch |
US5129514A (en) * | 1991-08-12 | 1992-07-14 | The Ensign-Bickford Company | Flexible cord winding and packaging configuration and method for making such package |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015036919A1 (en) * | 2013-09-12 | 2015-03-19 | Ael Mining Services Limited | Handling of shock tube |
Also Published As
Publication number | Publication date |
---|---|
AUPP748098A0 (en) | 1998-12-24 |
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