WO1997030926A1 - Forming a coil by planetary winding - Google Patents

Forming a coil by planetary winding Download PDF

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Publication number
WO1997030926A1
WO1997030926A1 PCT/IL1997/000053 IL9700053W WO9730926A1 WO 1997030926 A1 WO1997030926 A1 WO 1997030926A1 IL 9700053 W IL9700053 W IL 9700053W WO 9730926 A1 WO9730926 A1 WO 9730926A1
Authority
WO
WIPO (PCT)
Prior art keywords
mandrel
windable
winding
planetary
rotational
Prior art date
Application number
PCT/IL1997/000053
Other languages
French (fr)
Inventor
Moshe Kotzer
Leonid Libertchouk
Original Assignee
O.R.Y. Commerce Ltd.
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
Priority to IL11723996A priority Critical patent/IL117239D0/en
Priority to IL117239 priority
Application filed by O.R.Y. Commerce Ltd. filed Critical O.R.Y. Commerce Ltd.
Publication of WO1997030926A1 publication Critical patent/WO1997030926A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H81/00Methods, apparatus, or devices for covering or wrapping cores by winding webs, tapes, or filamentary material, not otherwise provided for
    • B65H81/06Covering or wrapping elongated cores
    • B65H81/08Covering or wrapping elongated cores by feeding material obliquely to the axis of the core
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151Coating hollow articles
    • B29C48/152Coating hollow articles the inner surfaces thereof
    • B29C48/153Coating both inner and outer surfaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56Winding and joining, e.g. winding spirally
    • B29C53/58Winding and joining, e.g. winding spirally helically
    • B29C53/60Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels
    • B29C53/68Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels with rotatable winding feed member
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00Winding, coiling, or depositing filamentary material
    • B65H54/02Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/28Traversing devices; Package-shaping arrangements
    • B65H54/2896Flyers

Abstract

A planetary winding machine (10) which includes a mandrel (16) having a longitudinal axis (30); support apparatus (26, 28) for supporting the mandrel (16) relative to a support surface (22), such that the longitudinal axis (30) thereof is maintained in a stationary position, but wherein the mandrel (16) is not restrained against axial rotation; a feed member (42) for continuous feeding of an elongate, windable element (12) from a source (14) of the windable element (12) into association with a predetermined portion of the mandrel (16); apparatus for causing planetary translation of the winding apparatus (18) about the mandrel (16) in a predetermined first rotational direction (88), and braking apparatus (70) for applying a predetermined braking force to the mandrel (16) in a second rotational direction (96), opposite to the first rotational direction (88); thereby to provide relative rotational motion between the mandrel (16) and the winding apparatus (18) and thus to facilitate winding of the windable element (12) onto the mandrel (16) into a coil.

Description

FORMING A COIL BY PLANETARY WINDING

FIELD OF THE INVENTION The present invention relates to machines for winding of elongate, flexible, windable elements.

BACKGROUND OF THE INVENTION

Machines for winding different types of windable element produced in a continuous process are well known. Such machines normally wind the windable element on a rod or drum, and are used for receiving various different types of continuous filament and cordlike products. Such machines may be used, inter alia, for the winding of wire, string, confectionery and the like.

A further example of the use of winding machines is in the production of electrofusion coupling devices. These devices are formed by continuous extrusion, during which a coiled or wound electric filament is extruded together with a thermoplastic pipe. The resulting extruded pipe is subsequently cut, in a further process, into short pieces, thereby to form electrofusion coupling devices, which serve to connect the ends of contiguous lengths of plastic pipe. The connection is formed by applying an electrical voltage across the internal coil of filament, thereby to cause the filament to become heated to a temperature which causes melting of the plastic - both the coupling device and of the pipes - and the forming of a permanent connection therebetween. Typical electrofusion coupling devices are as manufactured and sold by the Plasson Company of Maagan Michael, Mobile Post Menashe, Israel 37805.

SUMMARY OF THE INVENTION The present invention seeks to provide an improved planetary winding machine, in which an elongate, flexible, windable element may be wound onto a mandrel which is not, per se, restrained against rotation. This is of particular use in a continuous production process of electrofusion coupling devices. There is thus provided, in accordance with a preferred embodiment of the invention, a planetary winding machine which includes: a mandrel having a longitudinal axis; support apparatus for supporting the mandrel relative to a support surface, such that the longitudinal axis thereof is maintained in a stationary position, but wherein the mandrel is not restrained against axial rotation; a feed member for continuous feeding of an elongate, windable element from a source of the windable element into association with a predetermined portion of the mandrel; apparatus for causing planetary translation of the winding apparatus about the mandrel in a predetermined first rotational direction; and braking apparatus for applying a predetermined braking force to the mandrel in a second rotational direction, opposite to the first rotational direction, thereby to provide relative rotational motion between the mandrel and the winding apparatus and thus to facilitate winding of the windable element onto the mandrel into a coil.

Additionally in accordance with a preferred embodiment of the invention, the apparatus for causing planetary translation includes motive apparatus which is operative to rotate the feed member and, further, to operate the braking apparatus.

Further in accordance with a preferred embodiment of the invention, the apparatus for causing planetary translation of the winding apparatus further includes a drive member which is mounted for rotation about the mandrel and to which the winding apparatus is connected for rotation therewith in the first direction.

Preferably, the braking apparatus is also operated by the drive member so as to apply to the mandrel a braking force in the second direction.

Additionally in accordance with a preferred embodiment of the invention, the braking apparatus has a first toothed member mounted about the mandrel and rigidly attached to the support apparatus; a second toothed member mounted about the mandrel and rigidly attached thereto for rotation therewith; and gear apparatus driven by the drive member.

The gear apparatus has at least the following gear members, namely, a first gear member driven by the drive member and in meshing association with the first toothed member, and a second gear member in meshing association with the first toothed member and in meshing association with the second toothed member.

In the above outlined arrangement, the drive member drives the first gear about the mandrel in the first direction such that, when the first gear member meshes with the first toothed member the first gear member is rotated in the second direction. This causes the second gear member to transmit to the second toothed member a rotational force, also in the second direction, thereby to drive the mandrel in the second direction, opposite to the first direction.

Further in accordance with a preferred embodiment of the invention, the mandrel includes a rear end portion supported by the support apparatus and a front end portion on which the winding is provided, and the winding apparatus includes an elongate, generally tubular feed member for feeding the elongate windable element onto the front end portion of the mandrel, wherein the feed member extends through the support apparatus and is rotated planetarily about the rear end portion of the mandrel.

In accordance with a further embodiment of the invention, the above winding machine is used, in conjunction with a suitable extruder, for producing a coextruded plastic tubular product which has a wall in which is embedded a portion of a coil formed by the above winding machine.

The winding machine may further be used in a process of producing the above coextruded tubular plastic product.

Preferably, the coextruded product is an electrofusion coupling device, and the windable element is thus electrical filament wire. BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be more easily understood and appreciated form the following detailed description, taken in conjunction with the drawings, in which:

Fig. 1 is a partially cut-away side view of a planetary winding machine, constructed and operative in accordance with a preferred embodiment of the invention;

Fig. 2A is an enlarged, partially cut-away illustration showing the braking system of the winding machine of Fig. 1 ;

Fig. 2B is a cross-sectional view corresponding to that seen in Fig. 2A, taken along line B-B therein;

Fig. 3 is a front perspective view of the braking system of the winding machine of the invention, taken in the direction of line 3-3 in Fig. 1 ;

Fig. 4 is a cross-sectional view, similar to that of Fig. 2A, but wherein the illustrated transmission system is constructed in accordance with an alternative embodiment of the invention; and

Fig. 5 is a schematic block diagram illustration of apparatus for production of electrofusion coupling devices, employing the winding machine of the present invention.

DETAILED DESCRIPTION OF THE INVENTION Referring now initially to Fig. 1 , there is seen a planetary winding machine, referenced generally 10, constructed and operative in accordance with a preferred embodiment of the invention. The machine is used for winding substantially any type of windable element, such as twisted and non-twisted cords, threads, wires, cables, chains, and the like. In one example, the windable element may be electrical filament wire, such as used in the production of electrofusion coupling devices. An indeterminate length of windable element 12 is mounted on a spool 14, and is fed therefrom via winding machine 10 so as to be wound in a single layer on a mandrel 16. The present invention provides a means of winding the windable element 12 onto the mandrel 16 via a planetary winding system, referenced generally 18, which winds the element 12 about mandrel 16 while, at the same time, preventing it from rotating.

Planetary winding machine 10 is formed of a frame 20 located on a support surface 22, and on which are mounted a motor 24, a first end support 26, and a second end support 28. Mandrel 16 is mounted for axial rotation about its longitudinal axis 30, and has a rear end portion 32 and a front end portion 33. A first end 34 of rear end portion 32 is supported via rotational bearings 35 in association with first end support 26, while a second end 36 of rear end portion 32 is supported via rotational bearings 37 in association with second end support 28.

Referring now also to Figs. 2A and 2B, front end portion 33 of mandrel 16 extends outwardly beyond the second end support 28, and is configured for receiving thereon the wound element 12. As seen, in order to facilitate the formation thereon of a single wound layer, the surface 38 of front end portion 33 of mandrel 16 is tapered. Accordingly, as each "new" winding 39 (Figs. 2A and 2B) is fed onto the mandrel, the "old" windings 40 (figs. 2A and 2B) are forced to move axially along the mandrel surface 38, thereby to make room for the new winding 39 so as to maintain a single wound layer.

Machine 10 further includes a feed conduit 42 for the windable element 12. Conduit 42 is mounted for rotational translation about and parallel to axis 30. Conduit 42 has an inlet 44 (Fig. 1 ) via which windable element 12 is fed into the conduit, and an outlet 46, positioned close to mandrel surface 38.

The motion of conduit 42 is a planetary motion, wherein the windable element 12 is wound about the mandrel. As seen in Fig. 1 , conduit 42 extends through and is supported by a first wheel 48, mounted between bearings 35 and additional bearings 50 in a casing 52, on first end support 26; and further extends through and is supported by a second wheel 54, mounted between bearings 37 and additional bearings 56 in a casing 58, on second end support 28. The desired planetary motion of conduit 42 is provided via a drive wheel 60 which is mounted onto the mandrel rear end portion 32 via bearings 62 (Fig. 2B). Drive wheel 60 has formed therein an opening 64 (Fig. 2B) through which conduit 42 extends, and is driven by motor 24 via a drive output 66 of the motor and a drive belt 68.

As will be appreciated from the foregoing description, both the mandrel 16 and the feed conduit 42 are supported at common support locations and feed conduit 42 is rotated about the mandrel 16. Accordingly, mandrel 16 is supported, as described, by rotational bearings, and is thus is subjected to a rotational force applied thereto by feed conduit 42 via windable element 12. It will thus be appreciated that a braking force is required to prevent rotation of mandrel 16 so as to permit winding of windable element 12 thereon.

There is thus provided, in accordance with the present invention, a dynamic braking system, referenced generally 70, which, when motor 24 is operated so as to cause the planetary motion of conduit 42, is driven, also by motor 24, so as to apply a rotational force to mandrel 16 which is opposite and substantially equal to the winding force applied thereto, thereby to maintain the mandrel in a substantially stationary position so as to enable winding to take place.

Referring now to Figs. 2A, 2B and 3, dynamic braking system 70 includes a spur gear 72, which is mounted onto drive wheel 60 for rotation about an axis 72' extending through drive wheel 60 parallel to longitudinal axis 30 of mandrel 16. Spur gear 72 is arranged so as to traverse a first toothed rim 74 which is fixedly attached, as by fasteners 76, to casing 58. A first parasite wheel 78 is coaxially mounted with spur gear 72 so as to be rotatable therewith, and in meshing contact with second parasite wheel 80 and a third parasite wheel 82. Second and third parasite wheels 80 and 82 are mounted onto drive wheel 60 for rotation about respective axes 80' and 82' which are parallel to longitudinal axis 30 of mandrel 16. Third parasite wheel 82 is arranged in meshing contact with a second toothed rim 84 which is mounted coaxially with and fastened to mandrel rear end portion 32, as via a fastener 86. Referring now particularly to Fig. 3, it will be appreciated that operation of the motor 24 so as to rotate drive wheel 60 in a direction such that windable element 12 is wound onto front end portion 33 of mandrel 16, as indicated by arrow 88, causes simultaneous operation of dynamic braking system 70.

It should be noted that the description of directions of rotation in conjunction with the following description of the operation of braking system 70, are specifically as illustrated in Fig. 3, and is intended solely to indicate directions of rotation of each described component relative to the other components.

Accordingly, it will be appreciated that a rotation of drive wheel 60 in a counter-clockwise direction, as indicated by arrow 88, causes a corresponding planetary translation of spur gear 72 about first toothed rim 74. As described above, spur gear 72 is free to rotate about its axis 72', and first toothed rim 74 is fixed to casing 58 in a stationary position. Accordingly, as spur gear 72 traverses first toothed rim 74 in meshing contact therewith, spur gear 72 is rotated in a counter-clockwise direction, indicated by arrow 90. This rotation cause a similar counter-clockwise rotation, indicated by arrow 90', of first parasite wheel 78 mounted for rotation with spur gear 72.

The described counter-clockwise rotation of first parasite wheel 78 sets up an opposite, clockwise rotation of second parasite wheel 80, indicated by arrow 92, which causes third parasite wheel 82 to rotate in a counter clockwise direction, as indicated by arrow 94. As described above, third parasite wheel 82 is mounted in meshing contact with second toothed rim 84, which is fastened to mandrel rear end portion 32. Accordingly, as third parasite wheel 82 is driven counter-clockwise, it applies a braking force to mandrel 16, via second toothed rim 84, in a clockwise direction, as indicated by arrow 96, which is opposite to the force applied to the mandrel 16 in the winding direction indicated by arrow 88.

The gear ratios are preferably predetermined such that the braking force is equal to the winding force, that mandrel 16 is retained in a substantially stationary position while winding of windable element 12 thereon, takes place. In particular, spur gear 72 rotates N times during each single rotation of drive wheel 60. Furthermore, the gear ratio between first parasite wheel 78 and first toothed rim 74 is identical to the gear ratio between third parasite wheel 82 and second toothed rim 84; and the diameters of the first, second and third parasite wheels 78, 80 and 82 are identical. It thus follows that each complete traverse of first toothed rim 74 by spur gear 72 in one direction, is accompanied by a single rotation of second toothed rim 84, in the opposite direction, at an identical rotational velocity, thereby applying a desired braking force to mandrel 16.

Referring now briefly to Fig. 4, there is provided a winding machine 100 which is similar to the winding machine 10, shown and described above in conjunction with Figs. 1-3, with the exception of the configuration of the dynamic braking system, indicated in Fig. 4 by reference numeral 102. Accordingly, with the exception of braking system 102 and associated components, the remaining components of machine 100 are indicated by the same reference numerals as their counterpart components in machine 10, and are not specifically described again herein.

Dynamic braking system 102 includes a spur gear 104, which is mounted onto drive wheel 60 for rotation about an axis 104' extending therethrough, parallel to longitudinal axis 30 of mandrel 16. Spur gear 104 is arranged so as to traverse the interior of a first, inward-facing toothed rim 106 which is fixedly attached, as by fasteners 108, to casing 58. A first parasite wheel 110 is coaxially mounted with spur gear 104 so as to be rotatable therewith, and in meshing contact with a second parasite wheel 112. Second parasite wheel 112 is mounted onto drive wheel 60 for rotation about an axis 112' parallel to longitudinal axis 30 of mandrel 16., and in meshing contact with a second,

Figure imgf000010_0001
toothed rim 114 which is mounted coaxially with and fastened to mandrel rear end portion 32, as via a fastener 116.

As above, the description of directions of rotation in conjunction with the following description of the operation of braking system 102, is intended solely to indicate directions of rotation of each described component relative to the other components.

Accordingly, it will be appreciated that a rotation of drive wheel 60 in a counter-clockwise direction, causes a corresponding planetary translation of spur gear 104 about first, inward-facing toothed rim 106. As described above, spur gear 104 is free to rotate about its axis 104', and first, inward-facing toothed rim 106 is fixed to casing 58 in a stationary position. Accordingly, as spur gear 104 traverses first, inward-facing toothed rim 106 in meshing contact therewith, spur gear 104 is rotated in an opposite, clockwise direction. This rotation cause a similar clockwise rotation of first parasite wheel 110, mounted for rotation with spur gear 104.

The described clockwise rotation of first parasite wheel 110 sets up an opposite, counter-clockwise rotation of parasite wheel 112. As described above, second parasite wheel 112 is mounted in meshing contact with second, outward-facing toothed rim 114, which is fastened to mandrel rear end portion 32. Accordingly, as second parasite wheel 112 is driven counter-clockwise, it applies a braking force to mandrel 16, via second, outward-facing toothed rim 114, in a clockwise direction, which is opposite to the force applied to the mandrel 16 during the winding operation.

The gear ratios are preferably predetermined such that the braking force is equal to the winding force, that mandrel 16 is retained in a substantially stationary position while winding of windable element 12 thereon, takes place.

In particular, spur gear 104 rotates N times during each single rotation of drive wheel 60. Furthermore, the gear ratio between first parasite wheel 110 and first, inward-facing toothed rim 106 is identical to the gear ratio between second parasite wheel 112 and second, outward-facing toothed rim 114; and the diameters of the first and second parasite wheels 110 and 112 are identical. It thus follows that each complete traverse of first, inward-facing toothed rim 106 by spur gear 104 in one direction, is accompanied by a single rotation of second, outward-facing toothed rim 114, in the opposite direction, at an identical rotational velocity, thereby applying a desired braking force to mandrel 16.

Referring now to Fig. 5, there is shown, in schematic block diagram form, apparatus for the continuous production of electrofusion coupling devices. The apparatus includes a filament source 120, similar to spool 14 (Fig. 1 ), and a winding machine 122, similar to either winding machine 10 (Figs. 1-3) or 100 (Fig. 4). The winding machine has a mandrel 124 which is restrained against rotation, substantially as described above in conjunction with any of Figs. 1-4, and on which is continuously wound a filament coil 126. Coil 126 is fed into an extrusion head 128 together with a suitable thermoplastic, fed via a thermoplastic inlet 130. The extruding head has an outlet 131 through which the coextruded coil and thermoplastic are delivered so as to result in a continuous tubular member 132, having a cylindrical wall of thermoplastic in which filament coil 126 is embedded, substantially as known in the art. Tubular member 132 is cut into lengths of predetermined size, thereby to form electrofusion coupling devices.

It will be appreciated by persons skilled in the art that the winding machine of the present invention is particularly useful in the above-described electrofusion device production process, as the filament coil is required to move along its axis only, as it is fed into extrusion head 128, and not to rotate.

It will also be appreciated, however, that the winding machine of the invention is useful in any production process wherein it is desired to prevent a wound coil output from the machine from rotating.

It will be yet further appreciated by persons skilled in the art that, the scope of the present invention is not limited to what has been specifically shown and described hereinabove, merely by way of example. Rather, the scope of the present invention is limited solely by the claims, which follow.

Claims

1. A planetary winding machine which comprises: a mandrel having a longitudinal axis; support means for supporting said mandrel relative to a support surface, such that said longitudinal axis thereof is maintained in a stationary position, but wherein said mandrel is not restrained against axial rotation; feed means for continuous feeding of an elongate, windable element from a source of the windable element into association with a predetermined portion of said mandrel; means for causing planetary translation of said feed means about said mandrel in a predetermined first rotational direction; and braking means for applying a predetermined braking force to said mandrel in a second rotational direction, opposite to said first rotational direction, thereby to provide relative rotational motion between said mandrel and said winding means and thus to facilitate winding of the windable element onto said mandrel into a coil.
2. A planetary winding machine according to claim 1 , wherein said means for causing planetary translation comprises motive means which is operative to rotate said feed means about said mandrel and, further, to operate said braking means.
3. A planetary winding machine according to claim 2, wherein said means for causing planetary translation of said feed means further comprises a rotary drive member which is mounted onto said mandrel for rotation thereabout, said winding means being connected to said rotary drive member for rotation therewith in said first direction, and wherein said braking means is also operated by said rotary drive member so as to apply to said mandrel a braking force in said second direction.
4. A planetary winding machine according to claim 3, wherein said braking means comprises: a first toothed member mounted about said mandrel and rigidly attached to said support means; a second toothed member mounted about said mandrel and rigidly attached thereto for rotation therewith; and gear means driven by said drive member, and having at least a first gear member driven by said drive member and in meshing association with said first toothed member, and a second gear member in meshing association with said first toothed member and in meshing association with said second toothed member, wherein said drive member is operative to drive said first gear about said mandrel in said first rotational direction such that, when said first gear member meshes with said first toothed member, said first gear member is rotated in said second rotational direction, and said second gear member is operative to transmit to said second toothed member a rotational force also in said second direction, thereby to drive said mandrel in said second direction, opposite to said first direction.
5. A planetary winding machine according to claim 1 , wherein said mandrel comprises a rear end portion supported by said support means and a front end portion on which the windable element is wound, and said feed means comprises an elongate, generally tubular member for feeding the elongate windable element onto said front end portion of said mandrel, wherein said tubular member extends through said support means and is rotated planetarily about said rear end portion of said mandrel.
6. A system for winding a windable element into a coil comprising: a windable element source; and a planetary winding machine according to claim 1 , wherein said feed means is operative to receive the windable element from said windable element source. P L97/00053
7. Apparatus for producing a coextruded plastic tubular product which comprises a wall in which is embedded a portion of a coiled element, wherein said apparatus comprises: a system according to claim 6; and extrusion means having: a coiled element inlet associated with said mandrel for receiving therefrom a coil of the windable element, a plastic inlet for receiving plastic for extrusion, means for coextruding the plastic and the coiled element, thereby to form them into a coextruded plastic product, and an outlet for the coextruded plastic product.
8. A process for producing a coextruded plastic product having a wall in which is embedded a portion of a coiled element, wherein said process comprises the following steps: winding a windable element onto a mandrel so as to form a continuous coil; supplying the coil from the mandrel to an extruder; supplying a plastic material to the extruder; and coextruding the plastic material and the coil so as to form said coextruded plastic product, wherein said step of winding comprises the following sub-steps: preventing rotation of the mandrel, and planetarily winding the windable element about the mandrel, thereby to form the coil.
9. A process according to claim 8, wherein the windable element is filament wire, and said coextruded plastic product is an electrofusion coupling device.
PCT/IL1997/000053 1996-02-23 1997-02-13 Forming a coil by planetary winding WO1997030926A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
IL11723996A IL117239D0 (en) 1996-02-23 1996-02-23 Forming a coil by planetary winding
IL117239 1996-02-23

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Application Number Priority Date Filing Date Title
AU16163/97A AU1616397A (en) 1996-02-23 1997-02-13 Forming a coil by planetary winding

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001028756A1 (en) * 1999-10-21 2001-04-26 The Straw Company Pty Ltd. Spiral hose making apparatus and method
AU754111B1 (en) * 2002-02-04 2002-11-07 International Polymer Engineering, Inc. Machine and method for forming a spring coil in plastic tubing
JPWO2004018430A1 (en) * 2002-08-23 2005-12-08 麒麟麦酒株式会社 Compound having TGFβ inhibitory activity and pharmaceutical composition comprising the same
CN105179405A (en) * 2015-07-17 2015-12-23 建湖恒华机电有限公司 Machine for synchronous winding and gluing of uniform refrigerating refrigerator and freezer condensation tube

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4201035A (en) * 1977-08-11 1980-05-06 John Nolan Design Limited Winding machine
EP0159733A1 (en) * 1984-03-14 1985-10-30 Wavin B.V. Process and apparatus of manufacturing an electroweldable socket

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4201035A (en) * 1977-08-11 1980-05-06 John Nolan Design Limited Winding machine
EP0159733A1 (en) * 1984-03-14 1985-10-30 Wavin B.V. Process and apparatus of manufacturing an electroweldable socket

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001028756A1 (en) * 1999-10-21 2001-04-26 The Straw Company Pty Ltd. Spiral hose making apparatus and method
AU754111B1 (en) * 2002-02-04 2002-11-07 International Polymer Engineering, Inc. Machine and method for forming a spring coil in plastic tubing
JPWO2004018430A1 (en) * 2002-08-23 2005-12-08 麒麟麦酒株式会社 Compound having TGFβ inhibitory activity and pharmaceutical composition comprising the same
CN105179405A (en) * 2015-07-17 2015-12-23 建湖恒华机电有限公司 Machine for synchronous winding and gluing of uniform refrigerating refrigerator and freezer condensation tube

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Publication number Publication date
AU1616397A (en) 1997-09-10
IL117239D0 (en) 1996-06-18

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