GB2024278A - Fluidized powder filling of cables - Google Patents
Fluidized powder filling of cables Download PDFInfo
- Publication number
- GB2024278A GB2024278A GB7920889A GB7920889A GB2024278A GB 2024278 A GB2024278 A GB 2024278A GB 7920889 A GB7920889 A GB 7920889A GB 7920889 A GB7920889 A GB 7920889A GB 2024278 A GB2024278 A GB 2024278A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conductors
- cable
- powder
- box
- inlet
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/32—Filling or coating with impervious material
- H01B13/321—Filling or coating with impervious material the material being a powder
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Electric Cables (AREA)
- Ropes Or Cables (AREA)
Abstract
The conductors of a cable are powder filled by passing the cable through a fluidized bed of powder in a substantially closed condition. The filled cable can be wrapped with tape after exit from the fluidized bed. <IMAGE>
Description
SPECIFICATION
Fluidized powder filling of cables
This invention relates to the fluidized powderfilling of cables, to the apparatus therefore and to a cable filled by such a method.
Powder filled cables are well known, the powder being applied to the cable in an "open" form, that is with the individual conductors spaced apart so that powder can be applied, as by blowing or otherwise expelling the powder.
Various problems exist with the known ways of filling a cable, one of which is the obtaining uniformity of fill. It is important, in multilayer cables for example,thatfilling be uniform as variation from layer to layer causes variation in the electrical characteristics of the various layers. For telecommunications cables this is at least very undesirable, and in many instances unacceptable.
The present invention comprises filling a multiconductor cable by passing the cable through a fluidized bed of the filling powder, the cable being in a substantially closed condition before entering the fluidized bed.
The invention will be readily understood by the following description of a process and the related apparatus, in conjunction with the accompanying diagrammatic drawings, in which:- Figure 1 illustrates, in side view, a form of apparatus;
Figure 2 illustrates in diagrammatic cross-section a cable entering and passing through the apparatus;
Figure 3 is a perspective view of one form of apparatusforfilling two cables.
As illustrated in Figure 1, the apparatus comprises a main box or housing 10 having a top portion 11, an air box 12 at the bottom, an air inlet 13, a dust extraction outlet at 14 and a powder inlet 15. At an inlet end of the box 10 there is an inlet die 16 and at the other end of the box is an outlet die 17. The air box 12 is separated from the main box 10 by a porous plate 18.
In operation, powder is filled into the box 10, via inlet 15 and pressurized air is supplied to the air box 12 via the air inlet 13. The air passes through the porous plate 18 and fluidizes the powder in the box 10, as indicated at 19. A certain amount of dust is created and this is extracted through the dust outlet 14.
Prior to filling the box with powder the conductors of a cable are fed through the inlet and outlet dies 16 and 17. As illustrated in Figure 1 the conductors of the cable, at 20 are fed through a preforming guide 21 and then formed into cable form as they pass through the inlet die 16. An initial length of formed conductors is fed through the box 10 and out through the outlet die 17. The formed conductors can then be attached to a suitable lead member for connected to a pulling and take-up mechanism.
Once the conductors are through the box it can be closed, powder fed in and the fluidizing air supply switched on. The conductors are then pulled through the box. As the conductors exit from the box, through exit die 17, they are wrapped in a core
wrapping tape 25, by a former 26. In the particular
example the former 26 comprises a tapered or conical-entry portion 27 and a parallel portion 28.
The former forms, or wraps, the wrapping tape 25
round the conductors 20, preventing loss of filling
medium.
The conductors 20 can be separate, individual
conductors or, for telecommunications cables, may
comprise pairs of conductors twisted together. The conductors are fed into the box 10 via the inlet die
16, in a substantially closed condition. Some slight spacing between conductors can occur, such as may occur due to slight opening of the conductors after exiting from the inlet die 16, but such opening is
minimal. The degree of spacing can be varied, as by varying slightly the bore of the inlet die 16 to vary the amount of filling. Surprisingly, although the conductors are in a substantially closed condition, with probably several layers of conductors, uniform and complete filling is obtained, for cables of quite a large number of conductors. For example, satisfactory filling is obtained for a cable unit of 50 pairs of conductors.The path of the conductors through the box 10 is illustrated in Figure 2.
Figure 3 illustrates a typical form of apparatus for filling two cable cores, in the particular example each of twenty-five pairs of conductors. Two boxes 10 are situated side by side with a common powder supply 40. In the example illustrated rotary oscillating face-plates 41 are provided at the inlet dies to reciprocate or oscillate the conductors as they pass through the boxes. The supply of powder is controlled to maintain a substantially constant bed thickness. In an alternate arrangement, not shown, a plurality of cable cores can be passed through a common bed.
The apparatus is relatively inexpensive, simple and very effective. The process results in uniformly filled cable cores, the filling being controlled and variable as desired. The cable has uniform electrical characteristics.
CLAIMS:
1. A method of powder filling a multiconductor cable core comprising passing the cable core through a fluidized bed of filling powder, the cable core being in a substantially closed condition before entering thefluidized bed.
2. A method as claimed in claim 1, including wrapping the core in a tape on exit from the fluidized bed.
3. A method as claimed in claim 1 or 2, including supplying powder to the fluidized bed art a rate to maintain a substantially constant bed thickness.
4. A method as claimed in claim 1,2 or 3, including oscillating the conductors as they pass through the housing.
5. Apparatus for powder filling a multiconductor cable, comprising: a housing having a bottom and inlet and outlet ends; at least one inlet at the inlet end of the housing for entry of a cable core having a multiplicity of conductors, the inlet of a size to retain the core in a substantially closed condition; an outlet at the outlet end of the housing for exit of the cable
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (12)
1. A method of powder filling a multiconductor cable core comprising passing the cable core through a fluidized bed of filling powder, the cable core being in a substantially closed condition before entering thefluidized bed.
2. A method as claimed in claim 1, including wrapping the core in a tape on exit from the fluidized bed.
3. A method as claimed in claim 1 or 2, including supplying powder to the fluidized bed art a rate to maintain a substantially constant bed thickness.
4. A method as claimed in claim 1,2 or 3, including oscillating the conductors as they pass through the housing.
5. Apparatus for powder filling a multiconductor cable, comprising: a housing having a bottom and inlet and outlet ends; at least one inlet at the inlet end of the housing for entry of a cable core having a multiplicity of conductors, the inlet of a size to retain the core in a substantially closed condition; an outlet at the outlet end of the housing for exit of the cable core in a closed condition; and a porous member at the bottom of the housing and means for feeding air through the porous member to fluidize powder in the housing and surround the cable core with the fluidized powder.
6. Apparatus as claimed in claim 5, including an air box attached to the bottom of the housing, the means for feeding air including air supply means to the air box, the porous member extending between the air box and the housing.
7. Apparatus as claimed in claim 5 or 6, including a top portion on the housing and dust extraction means connected to the top portion.
8. Apparatus as claimed in claim 5, 6 or 7, including wrapping means adjacent to the outlet for wrapping a tape around the cable on exit through the outlet.
9. Apparatus as claimed in any one of claims 5 to 8, including a performing member positioned in front of the entry for preforming of the conductors prior to entry.
10. Apparatus as claimed in any one of claims 5 to 9, including an oscillating member at said inlet for oscillating the conductors as they pass through the housing.
11. A method of powder filling a multi-conductor cable core substantially as hereinbefore described.
12. Apparatus for powderfilling a multiconductor cable substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA306,402A CA1072729A (en) | 1978-06-28 | 1978-06-28 | Fluidized powder filling of cables |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2024278A true GB2024278A (en) | 1980-01-09 |
GB2024278B GB2024278B (en) | 1983-01-19 |
Family
ID=4111799
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7920889A Expired GB2024278B (en) | 1978-06-28 | 1979-06-15 | Fluidized powder filling of cables |
Country Status (16)
Country | Link |
---|---|
JP (1) | JPS556594A (en) |
AU (1) | AU4789479A (en) |
BE (1) | BE877345A (en) |
BR (1) | BR7903808A (en) |
CA (1) | CA1072729A (en) |
CH (1) | CH636726A5 (en) |
DE (1) | DE2925931A1 (en) |
DK (1) | DK248379A (en) |
ES (1) | ES481973A1 (en) |
FI (1) | FI71628C (en) |
FR (1) | FR2430072A1 (en) |
GB (1) | GB2024278B (en) |
IT (1) | IT1121397B (en) |
NL (1) | NL7904959A (en) |
NO (1) | NO792146L (en) |
SE (1) | SE445864B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0096123A1 (en) * | 1982-06-04 | 1983-12-21 | Northern Telecom Limited | Powder filled fiber optic cable |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1110836A (en) * | 1979-06-26 | 1981-10-20 | Northern Telecom Limited | Powder filling of electric cables, with cable vibrating means |
JPS59203744A (en) * | 1983-04-28 | 1984-11-17 | 電気化学工業株式会社 | Cement composition |
JPS59203743A (en) * | 1983-04-28 | 1984-11-17 | 電気化学工業株式会社 | Cement composition |
JPS6158872A (en) * | 1984-08-27 | 1986-03-26 | 菊水化学工業株式会社 | Foaming mortar composition |
US5273579A (en) * | 1990-06-19 | 1993-12-28 | Mitsubishi Mining And Cement Co., Ltd. | Quick setting compositions |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1277025A (en) * | 1968-09-23 | 1972-06-07 | British Insulated Callenders | Improvements in or relating to apparatus for applying powder to an elongate article |
IL38111A (en) * | 1970-12-02 | 1974-11-29 | Gen Electric | Fibrous reinforced resin composites and method for the production thereof |
CA1019933A (en) * | 1975-04-29 | 1977-11-01 | Leo V. Woytiuk | Method and apparatus for producing powder filled cable |
-
1978
- 1978-06-28 CA CA306,402A patent/CA1072729A/en not_active Expired
-
1979
- 1979-06-08 AU AU47894/79A patent/AU4789479A/en not_active Abandoned
- 1979-06-14 IT IT23575/79A patent/IT1121397B/en active
- 1979-06-14 DK DK248379A patent/DK248379A/en unknown
- 1979-06-15 FI FI791920A patent/FI71628C/en not_active IP Right Cessation
- 1979-06-15 GB GB7920889A patent/GB2024278B/en not_active Expired
- 1979-06-15 BR BR7903808A patent/BR7903808A/en unknown
- 1979-06-20 SE SE7905457A patent/SE445864B/en not_active IP Right Cessation
- 1979-06-26 NL NL7904959A patent/NL7904959A/en not_active Application Discontinuation
- 1979-06-26 NO NO792146A patent/NO792146L/en unknown
- 1979-06-26 FR FR7916457A patent/FR2430072A1/en active Granted
- 1979-06-26 JP JP7980379A patent/JPS556594A/en active Pending
- 1979-06-27 DE DE19792925931 patent/DE2925931A1/en not_active Ceased
- 1979-06-27 ES ES481973A patent/ES481973A1/en not_active Expired
- 1979-06-28 CH CH606379A patent/CH636726A5/en not_active IP Right Cessation
- 1979-06-28 BE BE0/196023A patent/BE877345A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0096123A1 (en) * | 1982-06-04 | 1983-12-21 | Northern Telecom Limited | Powder filled fiber optic cable |
Also Published As
Publication number | Publication date |
---|---|
NL7904959A (en) | 1980-01-03 |
GB2024278B (en) | 1983-01-19 |
DE2925931A1 (en) | 1980-01-10 |
SE7905457L (en) | 1979-12-29 |
FI71628C (en) | 1987-01-19 |
DK248379A (en) | 1979-12-29 |
IT1121397B (en) | 1986-04-02 |
CA1072729A (en) | 1980-03-04 |
FI791920A (en) | 1979-12-29 |
BE877345A (en) | 1979-12-28 |
JPS556594A (en) | 1980-01-18 |
ES481973A1 (en) | 1980-02-16 |
IT7923575A0 (en) | 1979-06-14 |
BR7903808A (en) | 1980-02-05 |
AU4789479A (en) | 1980-01-03 |
NO792146L (en) | 1980-01-02 |
FR2430072A1 (en) | 1980-01-25 |
FR2430072B1 (en) | 1985-02-01 |
SE445864B (en) | 1986-07-21 |
FI71628B (en) | 1986-10-10 |
CH636726A5 (en) | 1983-06-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4273597A (en) | Fluidized powder filling of cable core units | |
GB2024278A (en) | Fluidized powder filling of cables | |
US6526738B2 (en) | Method of and apparatus for making twisted cable and the cable produced thereby | |
GB1184611A (en) | Stranding Machine. | |
US4765130A (en) | Method and apparatus for making cable core | |
US3439483A (en) | Methods of and apparatus for packaging longitudinal material | |
DE69311103T2 (en) | Method and device for reversing stranding | |
US3921378A (en) | Cable component screening | |
US4205515A (en) | Apparatus for use in fluidized powder filling of multiple core unit cables | |
AU584917B2 (en) | Apparatus for and method of manufacturing taped products with double twist equipment | |
FI71629B (en) | FRAMEWORK FOR THE FRAMEWORK OF FRAMEWORK FOR TELECOMMUNICATIONS | |
EP0007634B1 (en) | Apparatus and method for use in fluidized powder filling of multiple core unit cables | |
US4265686A (en) | Power filling of cable core units | |
DE3026999A1 (en) | MULTI-WIRE ELECTRIC POWER CABLE AND METHOD FOR THE PRODUCTION THEREOF | |
US4252583A (en) | Methods of fluidized powder filling of cable cores | |
US1752497A (en) | Apparatus for producing electrical cables | |
US3030762A (en) | Cable twisting units | |
US1582026A (en) | Method of and apparatus for producing plastic articles | |
DE935678C (en) | Process for producing the cores and belt insulation of paper-insulated power and high-voltage cables | |
CA1103433A (en) | Powder filling of cable core units | |
CA1202475A (en) | Fluidized powder filling of cable core units | |
US2810011A (en) | Electric cables | |
US3247036A (en) | Method of producing communications cable | |
JPH0393116A (en) | Production of coaxial flat cable | |
KR101712327B1 (en) | Sensor cable manufacturing equipment |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |