EP0907497A1 - Process and device for shaping socket ends on plastic pipes - Google Patents
Process and device for shaping socket ends on plastic pipesInfo
- Publication number
- EP0907497A1 EP0907497A1 EP97926911A EP97926911A EP0907497A1 EP 0907497 A1 EP0907497 A1 EP 0907497A1 EP 97926911 A EP97926911 A EP 97926911A EP 97926911 A EP97926911 A EP 97926911A EP 0907497 A1 EP0907497 A1 EP 0907497A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- sleeve
- tool
- socket
- area
- 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- Withdrawn
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
- B29C57/04—Belling or enlarging, e.g. combined with forming a groove using mechanical means
- B29C57/06—Belling or enlarging, e.g. combined with forming a groove using mechanical means elastically deformable
-
- 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
- B29C57/04—Belling or enlarging, e.g. combined with forming a groove using mechanical means
-
- 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
- B29K2023/00—Use of polyalkenes or derivatives thereof 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
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
Definitions
- the invention relates to a method for producing end sleeves on plastic pipes from plastics which can be molded in the hot state, in particular polyolefins or PVC, in which an area having the sleeve length at the end of the pipe heats up to or above its deformation temperature in a heating station, in this state it is formed into a sleeve by means of a socket tool introduced from the pipe end and is cooled below the hot-forming temperature before and / or after the socket tool is pulled.
- the invention relates to a device for performing the method, with an on muff station, in which a e.g. as a tapering tool formed on the introducer, tapering tapering dome with relative longitudinal adjustment in a e.g. in a heating station heated to or above its deformation temperature, approximately the length of the sleeve, at the end of a plastic pipe, with expansion and deformation of this area to the sleeve.
- a e.g. as a tapering tool formed on the introducer, tapering tapering dome with relative longitudinal adjustment in a e.g. in a heating station heated to or above its deformation temperature, approximately the length of the sleeve, at the end of a plastic pipe, with expansion and deformation of this area to the sleeve.
- Polyolefins high-pressure and low-pressure polyethylene, polypropylene or other thermoformable plastics (thermoplastics), especially PVC.
- the possible Deformability largely depends on the respective manufacturing material and the temperatures that can be used during the shaping, the deformability being influenced not only by the main manufacturing material but also by the type, amount and consistency, for example grain size, of fillers used. In general, it can be said that the smaller the necessary expansion of the tube to the sleeve, the wall thickness of the tube and the length of the sleeve to be manufactured, the easier it is to manufacture.
- such sleeves can only be produced in series and productively up to limit dimensions, so that if, for example, sleeves with diameters and lengths above this limit are required, more expensive manufacturing materials with less fillers and cheaper materials for the entire tube Must use hot formability.
- Special shapes for the end sleeves for example for connecting thicker pipes or pipes with larger diameters, can often only be provided by manufacturing them in a separate injection molding process and connecting them to the pipe or directly to the end of an existing pipe at the Injection molding process. This statement also applies if the basic shape of a molding, for example a socket, differs largely from the basic shape of the pipe, for example if a square socket is to be connected to a round pipe.
- the usual procedure here is either to design the component to be connected as a fitting with a round pipe socket, which is inserted into a normal end sleeve of the pipe, or, as described above, for large series, to design this component again as a molded component.
- the object of the invention is to improve a method of the type mentioned at the outset in order to simplify the dimensionally accurate manufacture of sleeves, to enable the manufacture of sleeves which are larger in diameter and in length than by the previous method, and nevertheless to make dimensional changes by means of the To largely or completely avoid the effect of pipes made of the appropriate material.
- a partial object of the invention is to provide a simple device for carrying out the improved Procedure.
- the object is achieved in that the tube for the insertion of the socket tool is held at the outer end of the socket area with the insertion of the socket tool allowing the outside and inside of the tube wall to be clamped.
- the basic idea of the invention - in retrospect extremely simple - is that it is much easier to pull a resilient sheath onto a mandrel if the sheath is held by the introducer than to push the sheath over the mandrel under pressure .
- the tube material can be heated not only to a temperature that allows the deformation, but also to a much higher temperature at which a much larger part of the crystals that produce the memory effect is liquefied in the inherently crystalline structure of the thermoplastic than at the temperatures permitted for the deformation according to the previous methods.
- clamping jaws that can be adjusted radially from the starting diameter to the final diameter or, similar to expanding cores or folding cores, can have inner parts that can be designed such that they only protrude slightly beyond the inside of the pipe or are pressed into the inside of the pipe in the holding area, so that the sleeve tool can be run through.
- a preferred device for carrying out the method according to the invention is characterized in that for the outer end of the socket area of the pipe, a holding device is provided which has clamps with spreading members acting on the inside of the pipe wall, which expand the pipe material out of its basic position corresponding to the starting diameter of the pipe end into a tube that allows the socket tool to pass through and the pipe end with its outside against a counter-holder press ⁇ de clamping position are adjustable.
- the holding device has an outer sleeve through which the fitting tool can be inserted into the pipe end, the outer sleeve on the pipe side having an annular seat for the end of the expanded pipe with counterholders for the outside thereof and on it At a distance from this ring seat, on the insertion side and outside the tool guide path, spreading arms are held, which in the rest position with their free ends protrude inward at flat angles of attack into the longitudinal region of the ring seat and can engage there in the still undeformed pipe end, the retracting fitting tool also providing insertion aids for this tool, spreading arms spreading while widening the pipe end, so that they release the passage of the Aufmufftechnik ⁇ tool with their free ends, press the pipe end from the inside of the pipe against the counter holder of the ring seat and hold the pipe during hold on to the next fitting process.
- the counterholders are preferably attached in such a way that they only extend up to an annular bead intended for receiving a seal in the case of corresponding sleeves.
- the ring bead itself can be produced in a known manner, if necessary with the additional use of a divisible outer shape, by inflating the bead area into the outer shape or also using extendable folding cores of the suffing tool.
- the spreading arms consist of on the outer sleeve Angle of attack clamped and attached in a uniform circumferential distribution leaf springs.
- the use of springs as spreading arms has the advantage that no joints are necessary, the spreading movement takes place more easily and thin springs can be used which are easy to insert on the inside of the sleeve or in the flat grooves provided there for the insertion of the fitting tool Can find admission.
- One or more ring combs can be provided as counterholders of the ring seat, which, like the ends of the spreading arms, press into the heated pipe material in the clamped position.
- the end of the sleeve is held securely and has a clean appearance that resembles the outer edge of a crown cap.
- the fitting tool and the outer sleeve with a corresponding arrangement of the spreading arms deviate from the basic cross-sectional shape of a rotating body, e.g. have a quadrangular or polygonal cross-sectional shape for producing corresponding sleeves.
- FIG. 1 shows a pipe with an end sleeve produced according to the method according to the invention
- FIG. 2 shows the holding device according to the invention of an on muff station with an inserted pipe end before the fitting process on average
- FIG. 3 shows the holding device with the pipe end held and partly in FIG the pipe retracted Aufmuffdom the Aufmuffstation
- a sleeve 2 which is very long in relation to the tube diameter and has a large diameter, is formed on the end of a tube 1, which sleeve was held at its end 3 during the fitting process and at a distance from the end 3, for example by inflation in an outer shape manufactured ring bead 4 for receiving a sealing ring
- the sleeve area 2, 3, 4 of the tube was heated over its entire length to a relatively high temperature, so that the memory effect in the finished sleeve itself the manufacture from susceptible material is practically impossible
- the holding device 7 essentially consists of an outer sleeve 8 which is held at the outer end 9 and next to an annular seat 10 at the inner end 11 only slightly larger in diameter than the mandrel 5 and slightly tapered from the inner end 11 to a protruding part 12
- the protruding part 12 represents an annular groove with a triangular cross section, the outer flank of which drops towards 12 again.
- spring tongues 13 serving as spreading arms are attached, with the angle of attack falling flat against the end 11 and the ring seat 10 in the idle state.
- the free ends of the spring tongues 13 lie close together on a circle.
- the spring tongues can have a width of the order of 10 mm and a thickness of the order of 1 mm.
- the heated pipe 1 has been inserted into the outer sleeve 8 with its corresponding end in such a way that the end edge projects slightly beyond the ring seat 10, the ends of the spring tongues 13 engaging in this pipe end 3.
- the Aufmuffdom 5 is retracted from the right and thereby spreads the spring tongues 13 to the outside almost to rest on the inner wall of the outer sleeve 8, the free ends of the spring tongues or leaf springs 13 which engage in the pipe end 3, this Expand the tube end and press it into the ring seat 10.
- the ring seat 10 there are one or more ring combs 14 parallel to the edge, which, when the leaf springs 13 are fully expanded, press into the pipe end 3, which now forms the socket end, from the outside.
- the ends of the leaf springs also press outward into the sleeve end 3. From this position, the sleeve end, which is widened in any case by the pivoting out of the leaf springs, is held on the outer sleeve 8, so that the retracting Aufmuffdom not only receives an insertion aid via the leaf springs 13, but also a compression of the sleeve region of the tube when it is pulled onto the mandrel 5 is prevented.
- the sleeve area can be cooled beforehand until the sleeve 2 has the necessary stability, after which the sleeve dome comes out or the pipe 1 with the finished sleeve 2 from the sleeve dome is subtracted.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Gloves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT109296A AT404448B (en) | 1996-06-20 | 1996-06-20 | DEVICE FOR PRODUCING EXHAUST SLEEVES ON PLASTIC PIPES |
AT1092/96 | 1996-06-20 | ||
PCT/AT1997/000135 WO1997048545A1 (en) | 1996-06-20 | 1997-06-19 | Process and device for shaping socket ends on plastic pipes |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0907497A1 true EP0907497A1 (en) | 1999-04-14 |
Family
ID=3506414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97926911A Withdrawn EP0907497A1 (en) | 1996-06-20 | 1997-06-19 | Process and device for shaping socket ends on plastic pipes |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0907497A1 (en) |
JP (1) | JP2000512227A (en) |
CN (1) | CN1073924C (en) |
AT (1) | AT404448B (en) |
AU (1) | AU711665B2 (en) |
BR (1) | BR9709842A (en) |
CA (1) | CA2259639A1 (en) |
WO (1) | WO1997048545A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1015860C2 (en) * | 2000-08-02 | 2002-02-05 | Wavin Bv | Methods and devices for manufacturing a tube of biaxially oriented thermoplastic plastic material with an integral sleeve. |
US7310866B2 (en) * | 2005-01-11 | 2007-12-25 | Eddy Allan Balma | Method for manufacturing a percussion instrument |
CN107031031B (en) * | 2017-06-15 | 2019-02-01 | 青岛海聚新材料科技有限公司 | A kind of reinforced thermoplastics multiple tube forming apparatus for forming pipe end and method |
DE102018006829B4 (en) * | 2018-08-28 | 2020-03-19 | Global Safety Textiles Gmbh | Device and method for fixing a connection of a supply hose to an OPW airbag, in particular in a vehicle restraint system |
CN108943674A (en) * | 2018-08-31 | 2018-12-07 | 张家港市东南恒力汽车零部件有限公司 | Molding machine for plastic tube pipe end |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1479073B2 (en) * | 1963-01-19 | 1973-05-30 | Dynamit Nobel Ag, 5210 Troisdorf | DEVICE FOR CHANGING THE SECTION OF CYLINDRICAL HOLLOW BODIES MADE OF THERMALLY DEFORMABLE MATERIALS |
DE1471073A1 (en) * | 1963-09-26 | 1969-01-09 | Corhart Refractories Co | Refractory building material and furnace lining |
IT1213648B (en) * | 1987-07-16 | 1989-12-29 | Elmepla Spa | PROCEDURE FOR THE CREATION OF A STABLE GLASS WITH OR WITHOUT REINFORCEMENT IN POLYETHYLENE TUBES |
DE4333566A1 (en) * | 1992-11-04 | 1994-05-05 | Theysohn Friedrich Fa | Plastics tube and expansion - uses high frequency energy to heat and soften the plastics to reduce the heating time. |
-
1996
- 1996-06-20 AT AT109296A patent/AT404448B/en not_active IP Right Cessation
-
1997
- 1997-06-19 CA CA 2259639 patent/CA2259639A1/en not_active Abandoned
- 1997-06-19 JP JP10501943A patent/JP2000512227A/en not_active Ceased
- 1997-06-19 WO PCT/AT1997/000135 patent/WO1997048545A1/en not_active Application Discontinuation
- 1997-06-19 AU AU31597/97A patent/AU711665B2/en not_active Ceased
- 1997-06-19 CN CN97196602A patent/CN1073924C/en not_active Expired - Fee Related
- 1997-06-19 BR BR9709842-6A patent/BR9709842A/en active Search and Examination
- 1997-06-19 EP EP97926911A patent/EP0907497A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO9748545A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1073924C (en) | 2001-10-31 |
WO1997048545A1 (en) | 1997-12-24 |
AU711665B2 (en) | 1999-10-21 |
CA2259639A1 (en) | 1997-12-24 |
JP2000512227A (en) | 2000-09-19 |
AU3159797A (en) | 1998-01-07 |
AT404448B (en) | 1998-11-25 |
ATA109296A (en) | 1998-04-15 |
CN1225601A (en) | 1999-08-11 |
BR9709842A (en) | 2000-01-11 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17Q | First examination report despatched |
Effective date: 20001016 |
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STAA | Information on the status of an ep patent application or granted ep patent |
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18D | Application deemed to be withdrawn |
Effective date: 20010220 |