WO2018087661A1 - Joint d'étanchéité auto-adhésif et son procédé de fabrication - Google Patents

Joint d'étanchéité auto-adhésif et son procédé de fabrication Download PDF

Info

Publication number
WO2018087661A1
WO2018087661A1 PCT/IB2017/056956 IB2017056956W WO2018087661A1 WO 2018087661 A1 WO2018087661 A1 WO 2018087661A1 IB 2017056956 W IB2017056956 W IB 2017056956W WO 2018087661 A1 WO2018087661 A1 WO 2018087661A1
Authority
WO
WIPO (PCT)
Prior art keywords
adhesive
gasket
laminar
gaskets
areas
Prior art date
Application number
PCT/IB2017/056956
Other languages
English (en)
Inventor
Christian CICERO
Original Assignee
Cicero Christian
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 Cicero Christian filed Critical Cicero Christian
Publication of WO2018087661A1 publication Critical patent/WO2018087661A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/3846—Cutting-out; Stamping-out cutting out discs or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/021—Sealings between relatively-stationary surfaces with elastic packing
    • F16J15/022—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/061—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with positioning means
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/108—Special methods for making a non-metallic packing
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
    • F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
    • F16J15/126—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement consisting of additions, e.g. metallic fibres, metallic powders, randomly dispersed in the packing
    • 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
    • F16L23/00—Flanged joints
    • F16L23/16—Flanged joints characterised by the sealing means
    • F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings

Definitions

  • the present invention regards a ring-shaped self-adhesive gasket that can for example be used on flanges for connection between pumps and manifolds or on connections between ducts in systems of any type, industrial or civil, for example of the water, loading and unloading, heating, cooling, oil transportation, gas transportation, heating plants type or the like.
  • the invention also regards a method for obtaining such self-adhesive gasket.
  • gaskets are usually interposed between two elements of a system, such as for example between two flanges, so as to provide fluidic sealing between them.
  • the most frequently used gaskets have a rectangular cross-section, with two opposite flat surfaces, and they are made of elastically or plastically deformable material so as to facilitate perfect adhesion thereof to the surfaces of the mechanical parts to be connected.
  • conventional gaskets tend to move between the flanges during the positioning thereof upon fastening the surfaces of the flanges together.
  • An object of the present invention is to at least partly overcome the aforementioned drawbacks, by providing a self-adhesive gasket that is highly functional and inexpensive.
  • Another object of the present invention is to provide a self-adhesive gasket that can be easily positioned on the surfaces of mechanical components to be connected.
  • Another object of the present invention is to provide a self-adhesive gasket that can remain in position even when fastening the surfaces to be coupled so as to avoid leakage in case of erroneous positioning.
  • Another object of the present invention is to provide a self-adhesive gasket that can be easily removed from the surface on which it is positioned, for example for replacement or in case of erroneous positioning.
  • Another object of the present invention is to provide a self-adhesive gasket that can be produced by means of a simple, economic and rapid process.
  • FIG. 1 is a schematic view of a system I in which the gasket is used 1;
  • FIG. 2 is a front schematic view of an embodiment of the gasket 1;
  • FIG. 3 is a schematic view of an embodiment of the production line 200 of the gasket 1;
  • FIG. 4 is a schematic view of a configuration example of the laminar element 10, in which each area 20 thereof includes a single dot-like adhesive portion 2;
  • FIG. 4a is an enlarged view of some details of FIG. 4a.
  • a self-adhesive gasket 1 which is designed to remain interposed between any two elements of a system I, for example between two flanges El, E2.
  • system I may be of any type, civil or industrial, for example of the water, loading and unloading, heating, cooling, oil transportation, gas transportation, heating plant type or the like.
  • the gasket 1 may have a support structure , which may preferably be ring-shaped, for example with rectangular cross-section.
  • the support structure 1' may include one or more through holes 9, for example for allowing the screws for fastening the flanges or similar elements to pass through.
  • the support structure may have substantially flat and parallel surfaces 2', 3' mutually opposite to come into contact with the flange El and the flange E2 respectively.
  • the surface 2' may comprise one or more adhesive portions 2, which may be preferably covered by a removable protection layer 8.
  • an operator may fix the gasket 1 on one of the flanges, for example the flange El, preventing it from detaching therefrom by gravity, so as to have both hands free to perform the flange E2 and El fastening operation.
  • the operator may detach the gasket 1 from the flange El and reposition it thereon using only one hand, for example in case of erroneous positioning or when performing maintenance operations.
  • the above may be enabled by an appropriate choice of adhesive material that the adhesive portions 2 are made of, as well as by the distribution, number and dimension of the latter.
  • the support structure may have several adhesive portions 2, which may advantageously be substantially dot-like.
  • the adhesive portions 2 may be suitably equally distributed on the surface 2'.
  • the adhesive portions 2 may have an extension smaller than 80% of the area of the surface 2', preferably smaller than 50% and even more preferably smaller than 30% thereof.
  • the adhesive material that the adhesive portions 2 are made of may have characteristics such to guarantee the aforementioned function.
  • such adhesive material may have viscosity comprised between 1000 mPa s and 6000 mPa s at 160 °C and an operating temperature comprised between 140 °C and 170 °C.
  • the adhesive material may advantageously have properties such to enable the removal thereof from the gasket through a mechanical action imparted by the finger of the operator.
  • the adhesive material may preferably be Technomelt ® DM 6540 sold by Henkel ® .
  • the support structure 1' may suitably be made of graphite possibly reinforced with metal, for example Flexgraf ® sold by FMI SpA, or made of non-asbestos materials, for example non-asbestos cellulose, aramid or inorganic fibres compressed and bound using NBR/SBR rubber.
  • non-asbestos material may be Flexseals ® sold by FMI SpA.
  • the adhesive portions 2 may be mutually sufficiently spaced to enable the operator to interpose at least one finger with a hand protected by working gloves between two consecutive adhesive portions 2.
  • the removable protection layer 8 covering the surface 2' may advantageously be substantially coextensive with respect thereto. Such characteristic is particularly advantageous in terms of obtaining the gasket 1, as explained hereinafter. Furthermore, the suitable distribution of the adhesive portions 2 enables an easy removal of the protection layer 8 even under challenging operating conditions.
  • the material that the protection layer 8 is made of may be per se known, for example silicone coated paper.
  • the gasket 1 may be obtained in a simple and economic manner through the method described hereinafter.
  • such method may provide for preparing one or more laminar elements 10 and cutting the same so as to simultaneously obtain a plurality of self-adhesive gaskets 1.
  • the expression "preparation” and its derivatives is used to indicate the preparation of a component of interest in a process step of interest, thus including any preventive treatment aimed at the optimal execution of the step of interest, from simple picking and storage if required to heat and/or chemical and/or physical treatments and the like.
  • Each laminar element 10 may have a face 11 with a plurality of areas 20 each comprising the aforementioned adhesive portions 2, preferably dot-like.
  • the cutting may be carried out in each area 20, so as to obtain one or more gaskets 1 from each of the latter.
  • each area 20 may include one or more adhesive portions 2, and that cutting may be carried out at several adjacent areas.
  • each area 20 includes a single dot-like adhesive portion 2.
  • the subsequent cutting step may act on a plurality of adjacent areas 20, for example four areas, for each gasket 1.
  • each laminar element 10 may be covered by a removable protection sheet 80, so that gaskets 1 covered by a portion of the removable protection sheet 80, designated to define the aforementioned protection layer 8, are obtained upon cutting the laminar element 10 .
  • each laminar element 10 may be made of graphite possibly reinforced or made of non-asbestos material, while the removable protection sheet 80 may be made of silicone coated paper.
  • the laminar elements 10 can be cut in two or more steps, for example a first step in which the laminar elements 10 are cut into smaller laminar elements and a subsequent step in which the gaskets 1 are obtained from the latter.
  • each laminar element 10 may preferably be carried out so as to simultaneously act on all sheets.
  • the cutting operation may preferably be carried out through the water-cutting method.
  • cutting may be carried out using a blade.
  • a multi-head machining station 100 with a machining head 110 for each area 20.
  • the aforementioned laminar elements may be suitably mutually superimposed, each having the face 11 covered by the respective protection sheet 80 facing the face 12 of the subsequent laminar element.
  • the superimposition may be advantageously carried out in a manner such that the adhesive portions 2 of each area 20 of each of the laminar elements 10 are mutually matching.
  • each machining head 110 will also act on the areas 20 of the underlying laminar elements 10, so as to obtain a number of gaskets 1 equivalent to the number of the superimposed sheets for each area 20.
  • Each gasket 1 will include a portion of the protection sheet 80 defining a protection layer 8 substantially coextensive with the surface 2'. The above will enable producing a high number of gaskets 1 provided with the respective protection layer 8 in a single cutting operation.
  • the machining heads 110 may also be used to drill through-holes 9.
  • the laminar elements 10 with the adhesive portions 2 and the protection sheet 80 may be supplied already suitably superimposed from a storage site and thus supplied to the machining station 100.
  • machining station 100 may be picked in any number, superimposed in any suitable number and thus supplied to the machining station 100.
  • the operation for obtaining the adhesive portions 2 on the laminar elements 10 may be obtained through a machining line 200 that firstly obtains the same adhesive portions 2 for each laminar element and then performs the cutting to obtain the gaskets 1.
  • a machining station 120 arranged upstream of the machining station 100 may be used to this end.
  • the machining station 120 may be supplied by one or more laminar elements 10, and the adhesive material may be distributed on each one of them at the areas 20 to obtain the adhesive portions 2.
  • the machining station 120 may be of the multi-head type, one for each area 20 of each laminar element 10.
  • each machining head 130 may pour one or more substantially dot-like adhesive portions in liquid state.
  • the adhesive material may be in solid state at room temperature and pressure, for example in form of polygonal elements, and subsequently molten during the aforementioned pouring step.
  • the adhesive material may have a melting temperature comprised between 80 °C and 120 °C.
  • a machining station 140 in which the removable protection sheet 80 is applied on the face 11 of each laminar element 10. Such step may be carried out manually or mechanically.
  • One or more accumulation reservoirs may be possibly provided upstream of the machining station 120 and/or between the machining station 120 and the machining station 100 and/or at the exit of the machining station 100.
  • the gasket may be differently shaped with respect to the annular shape.
  • the adhesive material may also be any adhesive material suitable for the purpose in cases where particular pressure and/or temperature resistance requirements must be met.
  • the protection sheet may also be made of different materials with respect to the indicated material and it may be of shape and size suitable to ensure the covering of the portions provided with adhesive material alone.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Gasket Seals (AREA)

Abstract

Joint d'étanchéité auto-adhésif conçu pour rester interposé entre un premier et un second élément (E1, E2) d'un système (I) pour offrir une étanchéité fluidique locale. Le joint d'étanchéité comporte une structure de support de forme globalement annulaire (1') ayant une première et une seconde surface (2', 3') sensiblement plates et parallèles et mutuellement opposées pour rester face au premier élément (E1) et au second élément (E2) du système (I) ou entrer en contact respectif avec ceux-ci. La première surface (2') comprend au moins une partie adhésive (2) de manière à permettre à un opérateur de fixer le joint d'étanchéité sur le premier élément (E1) du système (I) de manière à l'empêcher de s'en détacher par gravité, si bien que l'opérateur peut fixer le second élément (E2) du système (I) sur le premier (E1) avec les deux mains libres.
PCT/IB2017/056956 2016-11-08 2017-11-07 Joint d'étanchéité auto-adhésif et son procédé de fabrication WO2018087661A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT202016000112416 2016-11-08
IT201600112416 2016-11-08

Publications (1)

Publication Number Publication Date
WO2018087661A1 true WO2018087661A1 (fr) 2018-05-17

Family

ID=60813873

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2017/056956 WO2018087661A1 (fr) 2016-11-08 2017-11-07 Joint d'étanchéité auto-adhésif et son procédé de fabrication

Country Status (1)

Country Link
WO (1) WO2018087661A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113119226A (zh) * 2021-04-20 2021-07-16 无锡协和精密模切件有限公司 一种分步冲压模切方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5311875A (en) * 1976-07-20 1978-02-02 Houto Kou Method and device for forming miniature packing
GB2400893A (en) * 2003-04-25 2004-10-27 Rolls Royce Plc A method of manufacturing a sealing device
US20040232624A1 (en) * 2002-03-11 2004-11-25 Hirokazu Hisano Closed annular sealing material and method for manufacturing same
JP2012207127A (ja) * 2011-03-29 2012-10-25 Nippon Zeon Co Ltd ホットメルト粘接着剤組成物
DE102014009480A1 (de) * 2014-06-30 2015-12-31 Alfred Jung Verfahren zur Herstellung einer Sollbruchstelle in einer Dichtungsanordnung mit Zentrierring

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5311875A (en) * 1976-07-20 1978-02-02 Houto Kou Method and device for forming miniature packing
US20040232624A1 (en) * 2002-03-11 2004-11-25 Hirokazu Hisano Closed annular sealing material and method for manufacturing same
GB2400893A (en) * 2003-04-25 2004-10-27 Rolls Royce Plc A method of manufacturing a sealing device
JP2012207127A (ja) * 2011-03-29 2012-10-25 Nippon Zeon Co Ltd ホットメルト粘接着剤組成物
DE102014009480A1 (de) * 2014-06-30 2015-12-31 Alfred Jung Verfahren zur Herstellung einer Sollbruchstelle in einer Dichtungsanordnung mit Zentrierring

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113119226A (zh) * 2021-04-20 2021-07-16 无锡协和精密模切件有限公司 一种分步冲压模切方法
CN113119226B (zh) * 2021-04-20 2022-01-14 无锡协和精密模切件有限公司 一种分步冲压模切方法

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