GB1587018A - Plastics socket pipe part and method of manufacturing same - Google Patents
Plastics socket pipe part and method of manufacturing same Download PDFInfo
- Publication number
- GB1587018A GB1587018A GB15216/78A GB1521678A GB1587018A GB 1587018 A GB1587018 A GB 1587018A GB 15216/78 A GB15216/78 A GB 15216/78A GB 1521678 A GB1521678 A GB 1521678A GB 1587018 A GB1587018 A GB 1587018A
- Authority
- GB
- United Kingdom
- Prior art keywords
- widening
- pipe part
- socket assembly
- annular recess
- wall
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
- B29C57/02—Belling or enlarging, e.g. combined with forming a groove
- B29C57/025—Belling or enlarging, e.g. combined with forming a groove combined with the introduction of a sealing ring, e.g. using the sealing element as forming element
-
- 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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
- F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Joints With Sleeves (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Gasket Seals (AREA)
- Pens And Brushes (AREA)
Abstract
This plastic tube (1) has two expansions (2, 3) in the form of steps. A third expansion (5) is formed via an oblique wall part (4). The end region (6) is bent inwards, with the insertion of a head part (9) of a sealing device which consists of a head part (9) and of a sealing sleeve (10), in such a manner that the free end (7) ends close to the transition (8) from the oblique wall part (4) to the third expansion, and forms a retaining ring having a J-shaped cross-section. In consequence, the collar can be formed with a seal using extruded plastic tubes which can be produced economically. <IMAGE>
Description
(54) PLASTICS SOCKET PIPE PART AND METHOD OF MANUFACTURING
SAME
(71) We, WAVIN B.V., a Netherlands limited liability company of 251 Händellaan 8031 EM Zwolle, The Netherlands, do hereby declare the invention, for which we pray that a patent maybe granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
The present invention relates to a plastics socket assembly and a method of manufacturing the same.
The invention, the scope of which is defined by the appended claims, includes a plastics socket assembly comprising a pipe part having a first widening of greater internal diameter than an axially inner adjacent wall of the pipe part, said first widening adjoining an axially outer second widening of greater internal diameter, and an end portion of the pipe part extending from said second widening back in a direction substantially parallel to the axis of the pipe part to define an annular recess; and a sealing member having a head portion received in said annular recess, and a sealing sleeve portion integral with said head portion for forming a seal between a spigot inserted in said socket assembly. in use, and said first widening of said pipe part, the minimum distance between the free end of the portion and an adjacent portion of the internal wall of the pipe part being sufficiently small to prevent the head portion from being removed from the annular recess.
The invention also includes a method of manufacturing a plastics socket assembly comprising the steps of, forming in an extruded plastics pipe part a first widening df greater internal diameter than an axially inner adjacent wall of the pipe part. said first widening being for receiving a sleeve portion of a sealing member. forming an axiallv outer second widening adjoining and of greater internal diameter than said first widening, disposing a head portion of the sealing member adjacent the second widening, and then bending an end portion of the pipe part back in a direction substantially parallel to the axis of the pipe part to define an annular recess such that the minimum distance between the free end of the end portion and an adjacent portion of the internal wall of the pipe part is sufficiently small to prevent the head portion from being removed from the annular recess.
In order that the invention may be well understood an embodiment thereof will now be described, by way of example only, with reference to the accompanying drawings in which:
Figure 1 shows a plastics pipe part in section on a mandrel before the end portion is bent back;
Figure 2 shows a sectional view of the socket assembly at a subsequent stage in its manufacture; and
Figure 3 shows a section through a completed socket assembly with the mould parts still in position.
The plastics socket assembly which is illustrated at various stages of its manufacture in the drawings comprises an extruded plastics pipe part 1. The pipe part 1 is provided with an initial widening; 2 of internal diameter somewhat greater than the internal diameter of the axially inner wall of the pipe part 1 to which the initial widening is joined by a frustoconical wall portion or shoulder. The spigot to be inserted in the socket assembly has an external diameter that is smaller than the internal diameter of the initial widening 2 and greater than the internal diameter of the axially inner wall of the pipe part 1. Thus, in use, the end of the spigot abuts the frustoconical wall portion or shoulder at the axially inner end of the inital widening 2 to provide means for limiting the axial penetra tion of the spigot into the socket assembly.
A first further widening 3 for receiving a sleeve portion 10 of a sealing member has a
greater internal diameter than the axially
inner adjacent initial widening 2 to which it
is joined by a frusto-conical wall portion or 'shoulder. The first widening 3 adjoins
another frustoconical wall portion 4 which connects it to a second further widening 5 of
greater internal diameter than the first
widening 3.
As best seen in Figure 3 the end portion 6
of the pipe part is bent back so that it
extends axially inwards to define a substan
tially 'U' shaped annular recess. In the
embodiment illustrated the free end 7 of the
end portion 6 extends to a position radially
inward of the transistion 8 between the
frusto-conical wall portion 4 and the second
widening 5, however the free end 7 need not
extend so far provided that the minimum
distance between the free end 7 and an
adjacent portion 11 of the internal wall of
the pipe part is sufficiently small to prevent
a head portion 9 of an annular sealing member from being removed from the
annular recess in which it is received. The sealing member also has a sealing sleeve portion 10 integral with the head portion 9 for forming a seal between a spigot inserted in said socket assembly and said first wide
ning 3 of the pipe part 1.
The thickess of the wall of the pipe part at each widening is substantially the same. The socket assembly may be made using a pipe part 1 of any suitable thermoplastics material for example polyvinylchloride.
In order to manufacture a socket assembly as above-described an extruded plastics pipe part 1 is slid over a mandrel as shown in
Figure 1. The mandrel is provided with parts of successively greater diameter for forming the widenings 2. 3 and 5 and intermediate frustoconical wall portions. The mandrel part 12a forms the initial widening 2. the mandrel part 12b forms the first widening 3 and the mandrel part 12c forms the second widening 5. The end portion 6 extending from the second widening 5 is then plasticized. by heating to a temperature of l4Q0C in the case of a polyvinylchloride pipe part.
The outer wall of the pipe part l is surrounded bv a first, mould part 13 defining the outer profile of the initial and first widenings and has an end portion 14 defined by the outer profile of the frustoconical wall portion 4 between the first and second widenings. The sealing member is then disposed with its head portion adjacent the second widening 5. A second external mould part lS having a recess 15 is then brought down over the end portion 6 to bend it so that it extends substantially radially inwards as shown in Figure 2. A third external mould part 16 with a recess 17 is then brought down onto the end portion 6 to bend it axially inwards so that it defines an annular recess in which the head portion 9 is received. The free end 7 extends to a position radially inwards of the junction of the first and second widenings such that the minimum distance between the free end 7 and an adjacent portion 11 of the internal wall is sufficiently small to prevent the head portion 9 from being removed from the annular recess. The recesses 15 and 17 in the second and third mould parts together define the external profile of a substantially 'U' shaped profile. The internal diameters of the two bends formed in the end portion 6 are of substantially the same internal diameter.
It will be appreciated that the above described method allows socket assemblies to be produced cheaply and simply from machine-made extruded plastics pipe parts rather than from more.expensive injection moulded pipe parts. It is not necessary to provide a further movable ring attached to the outside of the pipe part to assist in defining the annular recess as in hitherto proposed socket assemblies. Also the equipment required for manufacturing socket assemblies according to this method is very simple. The retention of the sealing member in the annular recess is secure and the head portion cannot be withdrawn when inserting the spigot or under pressure.
WHAT WE CLAIM IS:
1. A plastics socket assembly comprising a pipe part having a first widening of greater internal diameter than an axially inner adjacent wall of the pipe part, said first widening adjoining an axially outer second widening of greater internal diameter, and an end portion of the pipe part extending from said second widening back in a direction substantially parallel to the axis of the pipe part to define an annular recess; and a sealing member having a head portion received in said annular recess, and a sealing sleeve portion integral with said head portion for forming a seal between a spigot inserted in said socket assembly, in use, and said first widening of said pipe part.
the minimum distance between the free end of the end portion and an adjacent portion of the internal wall of the pipe part being sufficiently small to prevent the head portion from being removed from the annular recess.
2. A plastics socket assembly as claimed in claim 1, further comprising means for limiting the axial penetration of a spigot inserted,inio said socket assembly in use.
3. A plastics socket assembly as claimed in claim 2. wherein said limiting means comprises another widening adjoining and of smaller internal diameter than said first widening and disposed axially inwardly
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (12)
1. A plastics socket assembly comprising a pipe part having a first widening of greater internal diameter than an axially inner adjacent wall of the pipe part, said first widening adjoining an axially outer second widening of greater internal diameter, and an end portion of the pipe part extending from said second widening back in a direction substantially parallel to the axis of the pipe part to define an annular recess; and a sealing member having a head portion received in said annular recess, and a sealing sleeve portion integral with said head portion for forming a seal between a spigot inserted in said socket assembly, in use, and said first widening of said pipe part.
the minimum distance between the free end of the end portion and an adjacent portion of the internal wall of the pipe part being sufficiently small to prevent the head portion from being removed from the annular recess.
2. A plastics socket assembly as claimed in claim 1, further comprising means for limiting the axial penetration of a spigot inserted,inio said socket assembly in use.
3. A plastics socket assembly as claimed in claim 2. wherein said limiting means comprises another widening adjoining and of smaller internal diameter than said first widening and disposed axially inwardly
thereof such that, in use, a spigot inserted in said socket assembly abuts a shoulder at which said another widening merges into the axially inner adjacent wall of the pipe part which has a smaller internal diameter than the external diameter of the spigot.
4. A plastics socket assembly as claimed in any one of the preceding claims wherein the annular recess has a substantially 'U' shaped cross-section.
5. A plastics socket assembly as claimed in any one of the preceding claims, wherein the first and second widenings merge in a frusto-conical wall portion, said free end of the end portion extending back to a position radially inward of said frusto-conical wall portion.
6. A plastics socket assembly as claimed in any one of the preceding claims, wherein the thickness of the wall of the pipe part at each widening is substantially the same.
7. A method of manufacturing a plastics socket assembly comprising the steps of, forming in an extruded plastics pipe part a first widening of greater internal diameter than an axially inner adjacent wall of the pipe part, said first widening being for receiving a sleeve portion of a sealing member, forming an axially outer second widening adjoining and of greater internal diameter than said first widening, disposing a head portion of the sealing member adjacent the second widening, and then bending an end portion of the pipe part back in a direction substantially parallel to the axis of the pipe part to define an annular recess such that the minimum distance between the free end of the end portion and an adjacent portion of the internal wall of the pipe part is sufficiently small to prevent the head portion from being removed from the annular recess.
8. A method as claimed in claim 7, wherein the step of bending comprises the steps of bending the end portion such that it extends substantially radially inwards and then bending the end portion such that it extends axially inwards.
9. A method as claimed in claim 7 or 8, wherein the end portion is bent such that the free end extends back to a position radially inwards of the junction of the first and second widenings.
10. A method as claimed in any one of claims 7 to 9 wherein the bending step produces an annular recess of substantially 'U' shaped cross-section.
11. A plastics socket assembly substantially as herein described with reference to the accompanying drawings.
12. A method of manufacturing a plastics socket assembly substantially as herein described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2717487A DE2717487C3 (en) | 1977-04-20 | 1977-04-20 | Extruded plastic pipe part with molded socket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1587018A true GB1587018A (en) | 1981-03-25 |
Family
ID=6006796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15216/78A Expired GB1587018A (en) | 1977-04-20 | 1978-04-18 | Plastics socket pipe part and method of manufacturing same |
Country Status (18)
| Country | Link |
|---|---|
| JP (1) | JPS5415525A (en) |
| AT (1) | AT359341B (en) |
| BE (1) | BE866172A (en) |
| BR (1) | BR7802487A (en) |
| CH (1) | CH630161A5 (en) |
| DE (1) | DE2717487C3 (en) |
| DK (1) | DK150025C (en) |
| FI (1) | FI68558C (en) |
| FR (1) | FR2388196A1 (en) |
| GB (1) | GB1587018A (en) |
| IE (1) | IE46558B1 (en) |
| IT (1) | IT1103584B (en) |
| MX (1) | MX145538A (en) |
| NL (1) | NL179609C (en) |
| NO (1) | NO152953C (en) |
| NZ (1) | NZ187033A (en) |
| SE (1) | SE7804468L (en) |
| SU (1) | SU730316A3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2134949A (en) * | 1983-02-09 | 1984-08-22 | Plascoat Uk Limited | Improvements in road cones or the like |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0013040A1 (en) * | 1978-12-12 | 1980-07-09 | Polva-Nederland B.V. | Method and apparatus for forming couplings of thermoplastic material |
| NL7908625A (en) * | 1979-11-28 | 1981-07-01 | Wavin Bv | TUBE PART WITH ELASTIC SEALING BODY. |
| AT376605B (en) * | 1981-09-14 | 1984-12-10 | Schnallinger Helfried Ing | METHOD AND DEVICE FOR PRODUCING SLEEVES OD. DGL. |
| EP0092889A3 (en) * | 1982-04-23 | 1985-12-18 | Wavin B.V. | A method and apparatus for manufacturing a plastic pipe part with socket end, as well as a pipe part with socket end obtained in this way |
| NL8201709A (en) * | 1982-04-23 | 1983-11-16 | Wavin Bv | METHOD AND APPARATUS FOR MANUFACTURING A PLASTIC TUBE PART WITH MOF END. |
| DK162684A (en) * | 1983-03-22 | 1984-11-02 | Friedrichsfeld Gmbh | ROOM PART OR FITTING |
| DE3310226C2 (en) * | 1983-03-22 | 1985-08-22 | Friedrichsfeld Gmbh, Steinzeug- Und Kunststoffwerke, 6800 Mannheim | Pipe part or fitting |
| JPH076036B2 (en) * | 1986-05-21 | 1995-01-25 | 大同特殊鋼株式会社 | Free cutting steel |
| JPS62278252A (en) * | 1986-05-28 | 1987-12-03 | Daido Steel Co Ltd | Free-cutting austenitic stainless steel |
| JPH0774417B2 (en) * | 1987-04-30 | 1995-08-09 | 三洋電機株式会社 | Ni-Cr system stainless steel with improved corrosion resistance and machinability |
| DE4332774C2 (en) * | 1993-09-25 | 1997-10-23 | Vogelsang Ernst Gmbh Co Kg | Polyethylene plastic pipe section produced by extrusion |
| ES2223655T3 (en) | 1998-11-06 | 2005-03-01 | Lindab Ab | SEALING RING FOR TUBULAR ELEMENT. |
| IT201600104207A1 (en) * | 2016-10-18 | 2018-04-18 | Ipm S R L | PLASTIC TUBE WITH GLASS JOINT |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU38571A1 (en) * | 1959-06-29 | |||
| GB1227309A (en) * | 1970-03-04 | 1971-04-07 | ||
| US3755528A (en) * | 1971-09-13 | 1973-08-28 | Anger Kunststoff | Method for making tubular articles from a thermoplastic material |
| NL178491C (en) * | 1972-10-13 | 1986-04-01 | Polva Nederland Bv | Apparatus for forming a sleeve at the end of a tube of thermoplastic plastic. |
| FR2299586A1 (en) * | 1975-01-28 | 1976-08-27 | Everitube | Lip seal for telescopic pipe joint - has circular section annular finger held in groove in female pipe |
| NL170048B (en) * | 1976-01-29 | 1982-04-16 | Wavin Bv | METHOD FOR MANUFACTURING AN INJECTION MOLDED TUBE. |
| AT366210B (en) * | 1977-04-05 | 1982-03-25 | Vogelsang Ernst Gmbh Co Kg | PIPE CONNECTOR |
-
1977
- 1977-04-20 DE DE2717487A patent/DE2717487C3/en not_active Expired
-
1978
- 1978-04-18 NO NO781349A patent/NO152953C/en unknown
- 1978-04-18 FI FI781179A patent/FI68558C/en not_active IP Right Cessation
- 1978-04-18 CH CH415378A patent/CH630161A5/en not_active IP Right Cessation
- 1978-04-18 GB GB15216/78A patent/GB1587018A/en not_active Expired
- 1978-04-19 FR FR7811519A patent/FR2388196A1/en active Granted
- 1978-04-19 NL NLAANVRAGE7804175,A patent/NL179609C/en not_active IP Right Cessation
- 1978-04-19 IT IT48985/78A patent/IT1103584B/en active
- 1978-04-19 SE SE7804468A patent/SE7804468L/en unknown
- 1978-04-19 DK DK171478A patent/DK150025C/en not_active IP Right Cessation
- 1978-04-20 IE IE774/78A patent/IE46558B1/en unknown
- 1978-04-20 NZ NZ187033A patent/NZ187033A/en unknown
- 1978-04-20 JP JP4597778A patent/JPS5415525A/en active Granted
- 1978-04-20 AT AT284578A patent/AT359341B/en not_active IP Right Cessation
- 1978-04-20 SU SU782609454A patent/SU730316A3/en active
- 1978-04-20 BE BE186940A patent/BE866172A/en not_active IP Right Cessation
- 1978-04-20 BR BR7802487A patent/BR7802487A/en unknown
- 1978-04-20 MX MX173188A patent/MX145538A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2134949A (en) * | 1983-02-09 | 1984-08-22 | Plascoat Uk Limited | Improvements in road cones or the like |
Also Published As
| Publication number | Publication date |
|---|---|
| IE46558B1 (en) | 1983-07-13 |
| FI68558B (en) | 1985-06-28 |
| ATA284578A (en) | 1980-03-15 |
| IT1103584B (en) | 1985-10-14 |
| FR2388196A1 (en) | 1978-11-17 |
| NL7804175A (en) | 1978-10-24 |
| IT7848985A0 (en) | 1978-04-19 |
| AT359341B (en) | 1980-11-10 |
| NO152953C (en) | 1985-12-18 |
| DK150025B (en) | 1986-11-17 |
| DK150025C (en) | 1987-12-14 |
| JPS5415525A (en) | 1979-02-05 |
| SU730316A3 (en) | 1980-04-25 |
| FI781179A (en) | 1978-10-21 |
| BE866172A (en) | 1978-10-20 |
| BR7802487A (en) | 1978-12-05 |
| DE2717487C3 (en) | 1979-10-11 |
| NO781349L (en) | 1978-10-23 |
| FI68558C (en) | 1985-10-10 |
| NL179609C (en) | 1986-10-01 |
| SE7804468L (en) | 1978-10-21 |
| FR2388196B1 (en) | 1983-03-18 |
| CH630161A5 (en) | 1982-05-28 |
| IE780774L (en) | 1978-10-20 |
| NZ187033A (en) | 1982-03-09 |
| MX145538A (en) | 1982-03-03 |
| DK171478A (en) | 1978-10-21 |
| JPS61514B2 (en) | 1986-01-09 |
| DE2717487A1 (en) | 1978-10-26 |
| NO152953B (en) | 1985-09-09 |
| DE2717487B2 (en) | 1979-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1587018A (en) | Plastics socket pipe part and method of manufacturing same | |
| US5398974A (en) | Pipe connecting member | |
| USRE27141E (en) | Plastic pipe and coupling including satd ?ipe | |
| US3188117A (en) | Hose coupling having a continuous outer sheath | |
| EP0052017A1 (en) | Channelled plastic pipe with channel ends closed and method of producing the same | |
| FI89626B (en) | Tvaodelad klaemkoppling av metall | |
| US4331625A (en) | Socket pipe | |
| US5549865A (en) | Method for manufacture of an elastomeric tube coupling body | |
| JPH0583794B2 (en) | ||
| US6969481B2 (en) | Method for producing a pipe termination box from thermoplastic material | |
| US4369159A (en) | Plastic socket pipe part and method of manufacturing same | |
| US4124675A (en) | Process of insert molding of teflon tube and plastic body | |
| US4193426A (en) | Plastic socket pipe part | |
| JPS5833436B2 (en) | Socket pipe forming method | |
| SE446311B (en) | towing equipment | |
| JPS62116119A (en) | Molding process for sleeve of corrugated tube | |
| GB1576131A (en) | Tube coupling device components therefor and method for its manufacture | |
| FI56958C (en) | FOERPACKNING JAEMTE SAETT ATT FRAMSTAELLA EN SAODAN | |
| EP0650819B1 (en) | A Method and a mould for forming an expansion, such as a socket, in a pipe, and a plastic pipe | |
| JP5034603B2 (en) | Manufacturing method of in-core for joint | |
| FI115157B (en) | A pipe joint | |
| JP3018147B2 (en) | Large diameter pipe fittings | |
| IE902239A1 (en) | Pipes with integral sockets | |
| WO2001070480A1 (en) | Pipe couplings | |
| JP3045824B2 (en) | Manufacturing method of electric fusion joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |