GB2026129A - Reinforced hoses - Google Patents

Reinforced hoses Download PDF

Info

Publication number
GB2026129A
GB2026129A GB7925454A GB7925454A GB2026129A GB 2026129 A GB2026129 A GB 2026129A GB 7925454 A GB7925454 A GB 7925454A GB 7925454 A GB7925454 A GB 7925454A GB 2026129 A GB2026129 A GB 2026129A
Authority
GB
United Kingdom
Prior art keywords
tube member
tube
insert
internal
staple fibres
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.)
Withdrawn
Application number
GB7925454A
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.)
Metzeler Kautschuk AG
Original Assignee
Metzeler Kautschuk AG
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 Metzeler Kautschuk AG filed Critical Metzeler Kautschuk AG
Publication of GB2026129A publication Critical patent/GB2026129A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F16L11/085—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more braided layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/005—Hoses, i.e. flexible

Abstract

A flexible tube (10) has a reinforcing fabric insert (14) arranged between an internal tube member (12) and an external tube member (16). The material for the tube members is reinforced by admixed orientated staple fibres (18, 20), from 10 to 30 parts by weight of staple fibres being used per 100 parts by weight of tube member material. The material of the tube may be vulcanisable rubber and the staple fibres may comprise unregenerated cellulose. The tube may be made by extruding an inner member (12), applying a fabric layer (14) then either spraying or extruding the outer layer (16). <IMAGE>

Description

SPECIFICATION Flexible tube The invention relates to a flexible tube with an insert arranged between internal and external tube members, and to a method of producing such a flexible tube.
In a flexible tube of this type, the insert provided between the internal and external tube members acts as a reinforcement, and the functionality of the flexible tube isjeopardised if the insert and slight defects and deficiencies, which cannot be completely avoided in mass production. These production faults are generally only noticed when the tube is being used, and which stage there is no way in which they can be eliminated, and the only way of dealing with the matter is to replace the tube by a tube which is free from defects.
In particular, owing to the increasingly stringent specification requirements being demanded in the motor vehicle industry, additional requirements are imposed on the processing and making up of the raw material for these tubes prior to vulcanisation, and these are found to be disadvantageous in the testing of the article.
The object of the invention is therefore to provide a flexible tube and a method of producing it in which the above-mentioned disadvantages do not occur. In particular, a flexible tube is to be produced in which the required strength is ensured even if there is a fault in the reinforcing insert.
According to the invention there is provided a flexible tube comprising an insert arranged between an internal tube member and an external tube member, wherein the material for the external tube member and/or the material for the internal tube member is reinforced by admixed staple fibres.
In a preferred embodiment, both materials contain admixed staple fibres.
A particular advantage of the invention is that the internal tube member and the external tube member have an inherent strength which is indepedent of the insert and is sufficiently great for the flexible tube to remain completely functional, i.e. its bursting pressure remains above the prescribed value even if there are small defects in the insert. This can be achieved merely by mixing staple fibres with the starting materials for the internal and external tube members which are generally made of rubber, so that the known procedure for producing flexible tubes of this type only has to be modified slightly. Also, the conventional elastic materials which are available in many specifications can be used for the internal and external tube member so that there is the same variety of products as with known flexible tubes.
The staple fibres are advantageously mixed orientated in order to increase the strength of the flexible tube perpendicularly to its longitudinal direction.
In a preferred embodiment of the method of the present invention, a mixture of a vulcanisable rubber material, a vulcanisation agent, for example sulphur of an organic peroxide, and a staple fibre made of unregenerated cellulose of tubular structure is produced, using from 10 to 30 parts by weight of staple fibres per 100 parts by weight of rubber material.
This starting material is shaped in the desired manner and vulcanised.
For this purpose, the material for the internal tube member is extruded in the desired manner. An insert is made up on the extruded internal tube member and consists of a woven, knitted or hosiery fabric. An external tube member is then for over the insert by spraying or extruding the material for the external tube member generally rubber, which has also been mixed with staple fibres.
The starting material can be shaped in a conventional manner on a screw press extruder. Fibre orientations which differ depending on the desired properties can be achieved in the semi-finished material by varying the design of the extruding tools.
If necessary, it is possible to mix only one of the two materials, i.e. either that for the internal tube or that for the external tube, with the staple fibres.
The invention is described in more detail below with the aid of an embodiment illustrated in the accompanying drawing which shows a cross-section through a flexible tube according to the present invention.
A flexible tube 10 comprises an internal tube member 12, and insert 14 surrounding the internal tube member 12 and an external tube member 16. A woven, knitted or hosiery fabric can be used as insert 14.
The materials for the internal and external tube members 12 and 16, generally rubber, are mixed, before being processed to form the tube, with staple fibres which consist of a unregenerated cellulose of tubular structure and are indicated in the drawing by the reference numerals 18 and 20. The material contains from 10 to 30 parts by weight of staple fibres per 100 parts by weight rubber material ay any time.
The staple fibres 18 and 20 are supplied to the starting material in such a way that they are orientated longitudinally to the flexible tube 10 during the processing of the internal tube member 12 and external tube member 16 described below.
The flexible tube 10 is then produced as follows.
The rubber containing a vulcanisation agent for the internal tube member 12 is mixed with staple fibres 18. This material is, then extruded in the shape of the desired internal tube member 12, i.e. in the form of a tube having a predetermined internal diameter and the wall thickness of the internal tube member 12.
The extruded internal tube member 12 is assembled with the insert 14, i.e. the insert 14 is placed round the external surface of the internal tube member 12. The material for the external tube member 16, generally rubber, is then sprayed on the assembly of internal tube member 12 and insert 14.
As an alternative, the material for the external tube member can be extruded on to this assembly.
If necessary, the material for the external tube member 16 can previously be mixed with orientated staple fibres 20. It is also possible to mix only the material for the external tube member with orientated staple fibres.
This semi-finished tube is then vulcanised in the conventional manner, vulcanisation being carried out at a temperature of from 1200 to 200 C.
In to a preferred embodiment, the shaping of the starting material and the vulcanisation are carried simultaneously.

Claims (14)

1. Aflexibletubecomprising an insert arranged between an internal tube member and an external tube member, wherein the material for the external tube member and/orthe material for the internal tube member is reinforced by admixed staple fibres.
2. Aflexibletubeaccordingtoclaim 1,wherein the staple fibres are orientated.
3. A flexible tube according to claim 2, wherein the staple fibres are orientated differently in the external tube member and the internal tube member.
4. A flexible tube according to any one of claims 1 to 3, wherein the staple fibres consist of unregenerated cellulose having a tubular structure.
5. Aflexible tube according to any one of claims 1 to 4, wherein from 10 to 30 parts by weight of staple fibres are used per 100 parts by weight of tube member material.
6. A flexible tube according to any one of claims 1 to 5, wherein the insert is a woven, knitted or hosiery fabric.
7. Aflexible tube substantially as herein described with reference to the accompanying drawing.
8. A method of producing a flexible tube with an insert arranged between internal and external tube members, wherein the material for the internal tube member and/or the material of the external tube member is mixed with staple fibres, the material for the internal tube member is extruded, the insert is assembled onto the extruded internal tube member and the material for the external tube member is applied to the insert.
9. A method according to claim 8, wherein the material for the external tube member is sprayed on to the insert.
10. A method according to claim 8wherein the material for the external tube member is extruded on to the insert.
11. A method according to one of claims 8 to 10, wherein vulcanisation is carried out at a temperature of from 1 20 C to 2000C.
12. A method according to claim 11 wherein vulcanisation and deformation are carried out simultaneously.
13. A method according to 11 or 12 wherein sulphur or an organic peroxide is used as a vulcan ~isation agent.
14. A method of producing a flexible tube, substantially as herein described with reference to the accompanying drawing.
GB7925454A 1978-07-22 1979-07-20 Reinforced hoses Withdrawn GB2026129A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782832257 DE2832257A1 (en) 1978-07-22 1978-07-22 MANIFOLD HOSE AND METHOD FOR THE PRODUCTION THEREOF

Publications (1)

Publication Number Publication Date
GB2026129A true GB2026129A (en) 1980-01-30

Family

ID=6045099

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7925454A Withdrawn GB2026129A (en) 1978-07-22 1979-07-20 Reinforced hoses

Country Status (5)

Country Link
DE (1) DE2832257A1 (en)
DK (1) DK234979A (en)
FR (1) FR2431647A1 (en)
GB (1) GB2026129A (en)
SE (1) SE7906083L (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0278466A1 (en) * 1987-02-11 1988-08-17 Insituform International Inc. Improved passageway lining material
GB2282777A (en) * 1993-10-18 1995-04-19 Prod & Mangueras Especiales Reinforced hosepipe
EP0652396A1 (en) * 1993-11-10 1995-05-10 Continental Aktiengesellschaft Hose for the cooling water of a motor vehicle
WO1999030069A1 (en) * 1997-12-08 1999-06-17 Milliken Europe N.V. Textile reinforcing layer for flexible hoses, tubes and similar extended objects

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3151015C2 (en) * 1981-12-23 1986-12-18 Phoenix Ag, 2100 Hamburg T-shaped rubber hose

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0278466A1 (en) * 1987-02-11 1988-08-17 Insituform International Inc. Improved passageway lining material
GB2282777A (en) * 1993-10-18 1995-04-19 Prod & Mangueras Especiales Reinforced hosepipe
EP0652396A1 (en) * 1993-11-10 1995-05-10 Continental Aktiengesellschaft Hose for the cooling water of a motor vehicle
WO1999030069A1 (en) * 1997-12-08 1999-06-17 Milliken Europe N.V. Textile reinforcing layer for flexible hoses, tubes and similar extended objects

Also Published As

Publication number Publication date
SE7906083L (en) 1980-01-24
DE2832257A1 (en) 1980-01-31
DK234979A (en) 1980-01-23
FR2431647A1 (en) 1980-02-15

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Legal Events

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)