GB2124141A - Joining the ends of extruded profiles made of rubber or a rubber-like plastics material - Google Patents

Joining the ends of extruded profiles made of rubber or a rubber-like plastics material Download PDF

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Publication number
GB2124141A
GB2124141A GB08311725A GB8311725A GB2124141A GB 2124141 A GB2124141 A GB 2124141A GB 08311725 A GB08311725 A GB 08311725A GB 8311725 A GB8311725 A GB 8311725A GB 2124141 A GB2124141 A GB 2124141A
Authority
GB
United Kingdom
Prior art keywords
rubber
mould
joining
extruded profiles
additional substance
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
Application number
GB08311725A
Other versions
GB2124141B (en
GB8311725D0 (en
Inventor
Rolf Fischer
Dietmar Hermann
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.)
Continental AG
Original Assignee
Continental Gummi Werke 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 Continental Gummi Werke AG filed Critical Continental Gummi Werke AG
Publication of GB8311725D0 publication Critical patent/GB8311725D0/en
Publication of GB2124141A publication Critical patent/GB2124141A/en
Application granted granted Critical
Publication of GB2124141B publication Critical patent/GB2124141B/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/16—Sealing arrangements on wings or parts co-operating with the wings
    • E06B7/22—Sealing arrangements on wings or parts co-operating with the wings by means of elastic edgings, e.g. elastic rubber tubes; by means of resilient edgings, e.g. felt or plush strips, resilient metal strips
    • E06B7/23—Plastic, sponge rubber, or like strips or tubes
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14467—Joining articles or parts of a single article
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/038—Covering the joint by a coating material
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • B29C66/1162—Single bevel to bevel joints, e.g. mitre joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/524—Joining profiled elements
    • B29C66/5243—Joining profiled elements for forming corner connections, e.g. for making window frames or V-shaped pieces
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/26—Sealing devices, e.g. packaging for pistons or pipe joints

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Joining Of Corner Units Of Frames Or Wings (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The adjacent, mitred ends of extruded sealing profiles, which are combined to a form a frame and are made of rubber or rubber-like plastics materials, are usually adhesively joined together in a small mould. According to the invention, the resistance to tearing of the adhesive connection thereby produced is substantially increased when an additional substance, such as rubber or a rubber-like plastics material, is simultaneously injected into the internal angular region of the corner connection. <IMAGE>

Description

SPECIFICATION A method and device for joining the ends of extruded profiles made of rubber or a rubber-like plastics material The present invention relates to a method and device for joining the ends of extruded profiles, more especially sealing strips for windows of doors or vehicles and buildings, such profiles being joined together with an angle therebetween and being made of rubber or a rubber-like plastics material, the mitred ends being integrally joined together by the simultaneous effect of pressure and heat.
Such sealing strips, which are used as edgings, for example, for window-panes, boot openings and similar purposes, are generally required in the form of circular, endless sealing frames. For practical purposes, therefore, it has already become general practice to supply the strips ready for installation as an endless structure by combining their ends, such strips having been obtained by cutting-off lengths of extruded profiles produced in a straight line. It was anticipated that the adhesive connection or bonded joint formed by conventional means, for example, by vulcanisation or by the use of an adhesive, between the neatly mitred end faces adapted to one another could tolerate all of the dynamic stresses produced by the deformations occurring during use of the seals.Surprisingly, however, cases of premature failure were repeatedly experienced, such failure resulting undoubtedly from the sealing frames being excessively stretched during installation. In these cases, the otherwise regular endless connection of the frames was partially torn, starting from the internal vertex of the angle formed by the adjacent frame portions, more acute angles obviously causing more intensive tearing and, as a consequence thereof, even wider cracks. Despite a considerable amount of work, no basic remedy was found in tests carried out to overcome these problems by paying particular attention when preparing and forming the adhesive connections and also when installing the finished sealing frames, so that it seemed inevitable hitherto to add a certain amount of supplementary material.
In contrast thereto, the invention seeks to increase the resistance to tearing of the adhesive connection in the frame corners and to ensure integral adhesion in all of the surface areas, irrespective of the considerable deformation and tearing induced during the assembly operations.
According to the present invention there is provided a method for joining the ends of extruded profiles, more especially sealing strips for windows or doors of vehicles and buildings, such profiles being joined together with an angle therebetween and being made of rubber or a rubber-like plastics material, the mitred ends being integrally joined together by the simultaneous effect of pressure and heat, in which an additional substance is introduced in its plastic state, under pressure, into the internal angular region over at least a portion of the connecting joint and is integrally connected to the covered joint edges.
If, as is frequently the case, the extruded profile is comprised of a support or holding portion and a sealing portion, the additional substance such as rubber or a plastics material, is advantageously introduced in the region of the support portion only.
The invention provides an external reinforcement for the endless connections, such reinforcement being, on the one hand, simple to apply and, on the other hand, not interfering with the proper seating of the sealing frames, nor hindering the assembly operations. In all cases, it has proved adequate to provide the additional substance solely in the critical, internal angle vertex, thereby satisfying practical demands under all circumstances with reduced amounts, such that the additional substance forms only an arcuate element - when viewed with respect to its cross-section - for spanning the angular region in the manner of a concave groove or channel. It was therefore possible to reduce the supplementary material, which could scarcely be influenced by known means, to a small fraction of the amount which was customarily used hitherto - and this was done, however, for different reasons.
A device suitable for carrying out the method of the present invention comprises a heatabie mould, such mould having a removable closure member and accommodating the end portions of the combined extruded profiles, in which the mould is provided with a press cylinder which is open in the direction of the closure member, such press cylinder being connected to the cavity of the mould via a lateral extrusion bore and temporarily accommodating the additional substance, and the closure member is provided with a press piston which plunges into the press cylinder when the mould is closed.
A press cylinder according to the invention may be incorporated into known moulds, hitherto used for producing the endless connections, with relatively little work involved, and similarly no problems are encountered also when mounting an associated, single press piston on the closure member. In order to use the device of the invention only suitably measured amounts of an additional caoutchouc, rubber or plastics material mixture need to be introduced into the press cylinder, since such amounts are forced, under pressure, through the lateral bore towards the intended internal angular region when the closure member is mounted and the mould is completely closed, and such amounts are brought into adhesive bonding with the pertinent portions of the strip ends, without further assistance, during the course of the vulcanisation or crosslinking operation being used.
The present invention will be further illustrated, by way of example, with reference to the accompanying drawing in which the single figure is a schematic plan view of a portion of a device in accordance with the invention.
The drawing is a plan view of the opened underneath portion 1 of a mould which accommodates the two end portions 2 of a profiled strip and is used to produce an integral connection between such end portions by means of vulcanisation. The end faces of the strip, which meet each other at an acute angle, are mitred and enclose a butt joint 12 therebetween.
An upwardly open press cylinder 3 is provided in the vicinity of the internal vertex point of the frame angle in the form of a simple blind hole or a blind-end bore, together with an extrusion bore 13 which is laterally provided in the base region of the press cylinder 3 and extends towards the angle vertex. In exact conformity therewith, an attachment member forming the press piston is provided on the closure member (not shown) of the mould. As a consequence thereof, the arrangement is such that, once the closure member has been mounted upon the underneath portion 1 of the mould, the piston plunges into the press cylinder 3 and forces the additional substance contained therein, such as caoutchouc, rubber or plastics material, through the extrusion bore 13 towards the strip ends 2 in the direction of the internal corner region. In the internal angular region of the connection, the finished sealing frames removed from the mould are then provided with a concave groove or channel 4 which partially spans the connecting joint 12.

Claims (7)

1. A method for joining the ends of extruded profiles, more especially sealing strips for windows or doors of vehicles and buildings, such profiles being joined together with an angle therebetween and being made of rubber or a rubber-like plastics material, the mitred ends being integrally joined together by the simultaneous effect of pressure and heat, in which an additional substance is introduced in its plastic state, under pressure, into the internal angular region over at least a portion of the connecting joint and is integrally connected to the covered joint edges.
2. A method as claimed in claim 1, in which the inserted additional substance is moulded to form an arcuate element which spans the internal angular region in the manner of a concave channel or groove.
3. A method as claimed in claim 1 or 2, in which the additional substance is rubber or a plastics material.
4. A method as claimed in claim 1, 2 or 3, for joining the ends of extruded profiles which are each comprised of a support portion and a sealing portion, in which the additional substance is only introduced in the region of the support portion.
5. A method for joining the ends of extruded profiles as claimed in any preceding claim, substantially as hereinbefore described.
6. A device for carrying out the method as claimed in any one of claims 1 to 5, including a heatable mould, such mould having a removable closure member and accommodating the end portions of the combined extruded profiles, in which the mould is provided with a press cylinder which is opened in the direction of the closure member, such press cylinder being connected to the cavity of the mould via a lateral extrusion bore and temporarily accommodating the additional substance, and the closure member is provided with a press piston which plunges into the press cylinder when the mould is closed.
7. A device for joining the ends of extruded profiles, substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
GB08311725A 1982-06-08 1983-04-29 Joining the ends of extruded profiles made of rubber or a rubber-like plastic material Expired GB2124141B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823221594 DE3221594A1 (en) 1982-06-08 1982-06-08 METHOD AND DEVICE FOR CONNECTING THE ENDS OF PROFILE STRINGS OF RUBBER OR RUBBER-LIKE PLASTIC

Publications (3)

Publication Number Publication Date
GB8311725D0 GB8311725D0 (en) 1983-06-02
GB2124141A true GB2124141A (en) 1984-02-15
GB2124141B GB2124141B (en) 1985-10-30

Family

ID=6165625

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08311725A Expired GB2124141B (en) 1982-06-08 1983-04-29 Joining the ends of extruded profiles made of rubber or a rubber-like plastic material

Country Status (4)

Country Link
DE (1) DE3221594A1 (en)
FR (1) FR2527974B1 (en)
GB (1) GB2124141B (en)
IT (1) IT1166514B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2222626A (en) * 1988-09-03 1990-03-14 Daimler Benz Ag Seal connection
US5069849A (en) * 1990-02-07 1991-12-03 Wain Peter L Method for forming a molding
WO1999015752A1 (en) * 1997-09-24 1999-04-01 S.D. Investments Limited Gasket for cladding system
US7628947B2 (en) 2002-03-22 2009-12-08 Pilkington Italia S.P.A. Process for manufacturing a glazing

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU568676B2 (en) * 1983-08-04 1988-01-07 Emhart Glass Machinery Investments Inc. Glass pusher
DE3402324C2 (en) * 1984-01-20 1986-09-25 Steinburg AG, Vaduz Sleeve for sealing the joints of pipes
DK8600511A (en) * 1985-02-04 1986-08-05
DE4418621A1 (en) * 1994-05-27 1995-12-07 Helmut Wenger Joining ends of profiled rubber strip and process equipment
DE10052108B4 (en) * 2000-10-20 2013-06-20 Volkswagen Ag Method for sealing sheet metal gaps
FR2890076B1 (en) 2005-08-26 2007-11-30 Plastic Omnium Cie METHOD OF SOLIDARIZING TWO PIECES OF THERMOPLASTIC MATERIAL USING BINDER MATERIAL
CN113183476A (en) * 2021-04-30 2021-07-30 重庆福信强橡塑制品有限公司 Butt joint machine for end parts of rubber sealing strips

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7911997U1 (en) * 1979-08-02 Gfa-Gesellschaft Fuer Abdichtungsprofile Mbh, 1000 Berlin Device for connecting sealing profiles for windows, doors and the like
FR1004041A (en) * 1949-02-14 1952-03-25 Gen Tire & Rubber Co Method for obliquely joining sections of vulcanized rubber bands
FR1112984A (en) * 1954-10-22 1956-03-21 Surface coating manufacturing process
US3119540A (en) * 1960-05-04 1964-01-28 Johnson & Johnson Container
LU55601A1 (en) * 1968-03-01 1969-10-02
FR2332409A1 (en) * 1975-11-21 1977-06-17 Draftex Dev Ag Profiled strip for sealing door or window opening - with corner section applied by low-temp. pressing
US4183778A (en) * 1977-11-14 1980-01-15 Etablissements Mesnel Method of making sealing strip joint

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2222626A (en) * 1988-09-03 1990-03-14 Daimler Benz Ag Seal connection
GB2222626B (en) * 1988-09-03 1992-04-01 Daimler Benz Ag Seal arrangement for connecting seals
US5069849A (en) * 1990-02-07 1991-12-03 Wain Peter L Method for forming a molding
WO1999015752A1 (en) * 1997-09-24 1999-04-01 S.D. Investments Limited Gasket for cladding system
US7628947B2 (en) 2002-03-22 2009-12-08 Pilkington Italia S.P.A. Process for manufacturing a glazing

Also Published As

Publication number Publication date
DE3221594A1 (en) 1983-12-08
GB2124141B (en) 1985-10-30
IT8321263A1 (en) 1984-11-24
FR2527974B1 (en) 1987-02-20
IT8321263A0 (en) 1983-05-24
GB8311725D0 (en) 1983-06-02
FR2527974A1 (en) 1983-12-09
DE3221594C2 (en) 1990-04-05
IT1166514B (en) 1987-05-06

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19990429