WO1999022922A2 - Joints et appareil servant a former des joints - Google Patents

Joints et appareil servant a former des joints Download PDF

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Publication number
WO1999022922A2
WO1999022922A2 PCT/US1998/023429 US9823429W WO9922922A2 WO 1999022922 A2 WO1999022922 A2 WO 1999022922A2 US 9823429 W US9823429 W US 9823429W WO 9922922 A2 WO9922922 A2 WO 9922922A2
Authority
WO
WIPO (PCT)
Prior art keywords
gasket
substrate
preform
compression
elastomeric compound
Prior art date
Application number
PCT/US1998/023429
Other languages
English (en)
Other versions
WO1999022922A3 (fr
Inventor
Dennis J. Argazzi
Hans Haas
Original Assignee
Loctite Corporation
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 Loctite Corporation filed Critical Loctite Corporation
Priority to AU13033/99A priority Critical patent/AU1303399A/en
Publication of WO1999022922A2 publication Critical patent/WO1999022922A2/fr
Publication of WO1999022922A3 publication Critical patent/WO1999022922A3/fr

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
    • B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
    • B29C31/042—Feeding of the material to be moulded, e.g. into a mould cavity using dispensing heads, e.g. extruders, placed over or apart from the moulds
    • B29C31/044—Feeding of the material to be moulded, e.g. into a mould cavity using dispensing heads, e.g. extruders, placed over or apart from the moulds with moving heads for distributing liquid or viscous material into the moulds
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/34—Feeding the material to the mould or the compression means
    • 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
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0053—Producing sealings
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/34—Feeding the material to the mould or the compression means
    • B29C2043/3433—Feeding the material to the mould or the compression means using dispensing heads, e.g. extruders, placed over or apart from the moulds
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/34—Feeding the material to the mould or the compression means
    • B29C2043/3433—Feeding the material to the mould or the compression means using dispensing heads, e.g. extruders, placed over or apart from the moulds
    • B29C2043/3438—Feeding the material to the mould or the compression means using dispensing heads, e.g. extruders, placed over or apart from the moulds moving during dispensing over the moulds, e.g. laying up
    • 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
    • B29L2009/00—Layered products
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • F01M2011/0062—Gaskets

Definitions

  • the present invention relates to
  • Compression gaskets are placed between the contact surfaces of mating components
  • Compression gaskets are typically formed of resiliently
  • One method for forming a compression gasket is to cut the gasket from a preformed
  • gaskets fill a wide variety of gasketing needs. Such cut gaskets may be formed into almost
  • gasket pattern may cut to the near exact configuration of
  • gaskets due to design and material limitations, may not provide the optimum performance.
  • a second method for forming gaskets is to cut or slice rolled stock. For example, if a
  • a third method of forming compression gaskets is to mold the gasket from a moldable
  • a fourth method for forming compression gaskets involves forming the gasket
  • gaskets generally require gasket suppliers and point-of-sale merchants to keep large
  • the present invention meets that desire by providing a method of producing
  • the present invention provides a system of producing compression gaskets
  • the present invention provides an apparatus for producing compression
  • the present invention provides an improved compression gaskets having
  • pattern includes the steps of forming a gasket preform of a flowable elastomeric compound
  • the present invention also provides an apparatus for making a
  • the apparatus includes a dispensing head, a numerical control motion
  • the apparatus also includes a source
  • the elastomeric compound is dispensed by the head at a
  • the apparatus further includes a
  • first pressing plate having a first substrate whereby the dispensing head dispenses the
  • a second pressing plate having a second substrate is positionable over the first
  • substrates are capable of compressing the dispensed elastomeric compound to a desired
  • FIG. 1 is a schematic representation of the gasket-forming apparatus of the present
  • Figure 2 is a schematic representation of the formation of a compression gasket in
  • Figure 3 depicts the material delivery system of the present invention.
  • Figure 4 is a front elevational view of the nozzle positioning system of the present
  • Figure 5 is a plan view of the interdigitation between a motion control belt and a
  • Figure 6 is a partial elevational view of the sprocket of Figure 5 depicting the drag
  • Figure 7 depicts the drag forces acting on the sprocket of Figure 5 as teeth of the
  • Figure 8 shows a second dispensing mechanism provided on the saddle of the nozzle
  • Figure 9 shows a plate onto which gasketing material is dispensed and compressed in
  • Figure 10 is an enlarged perspective view of the plate of Figure 9 showing a surface
  • Figure 11 is a lower perspective cross-sectional view of the plate of Figure 10 taken
  • Figure 12 depicts a trace path followed by the dispense nozzle, and the resulting
  • gasket preform when forming a gasket of the present invention.
  • Figure 13 is a cross-sectional view through line 13-13 of the gasket preform of Figure
  • Figure 14 is a cross-sectional view taken through line 14-14 of Figure 12 showing a
  • Figure 15 is a perspective view of a gasket formed in accordance with the present
  • Figure 16 is a cross-sectional view of the gasket of Figure 15 taken through line 16-16
  • Figure 17 is a cross-sectional view of the gasket of Figure 15 taken through line 17-17
  • Figure 18 shows a gasket of the present invention formed from multiple beads of
  • Figure 19 is a cross-sectional view of the gasket of Figure 18 taken through line 19-
  • Figure 20 is a cross-sectional view of the gasket of Figure 18 compressed between
  • Figure 21 depicts a gasket of the present invention including rigid inserts positioned
  • Figure 22 is a cross-sectional view of the gasket of Figure 21 through line 22-22.
  • Figure 23 depicts the cross-section of the gasket of Figure 22 under compression
  • Figure 24 depicts a gasket of the present invention including rigid inserts formed
  • Figure 25 is a cross-sectional view of the gasket of Figure 24 through line 25-25.
  • Figure 26 depicts the cross-section of the gasket of Figure 25 under compression
  • the present invention provides a method and apparatus for forming compression
  • gaskets and also provides an improved compression gasket formed by the method and
  • the plates including the gasket material, may then be placed in an curing chamber 18
  • the gasket 10 may be removed from the plates 14, 16 and may be used immediately after
  • the gasket-forming apparatus 1 of the present invention precisely dispenses the
  • curable elastomeric material 12 in a configuration referred to as a gasket preform 20 onto the
  • a conduit line 22 delivers the elastomeric material 12 through a remote conduit
  • Dispense nozzle 32 is movable in three
  • Controller 26 directs the movement of the remote dispense valve 24 in an x-y-z plane so as to
  • controller 26 As a series of commands for delivering the
  • remote dispense valve 24 so that the material will be dispensed along the trace pattern 21
  • the apparatus of the present invention may be programmed to produce gaskets having
  • the apparatus may produce gaskets having
  • multiple fasteners inserted therethrough may also be formed in accordance with the present
  • the apparatus may further couple adjacent materials of varying compressibility to
  • the apparatus may also be adapted to
  • Gasket-forming apparatus 1 occupies a relatively small footprint of floor space
  • pneumatic components are operable on about sixty pounds per square inch pressure from a
  • invention is desirably a single- or multi- component elastomeric flowable material capable of
  • One component i.e. one part curable, materials are desirably used.
  • Multi-part curable materials may also be employed and in such use the parts are generally
  • material 12 may be a silicone- or polyurethane-containing material.
  • the flowable elastomer should be sufficiently viscous or thixotropic to retain the
  • temperature is not critical and will depend on a number of factors such as the type of material,
  • elastomer is desirably a compound possessing a combination of physical properties, such as compressive strength, chemical resistance, elongation, set resistance, creep resistance, and the
  • Material 12 should be deformable in its preform configuration. Various flowable,
  • solidifiable materials may be employed in the present invention as material 12.
  • material 12 Useful
  • the material must have enough thixotropic character
  • the preform should substantially
  • One desired class includes natural and synthetic elastomers. While the term
  • conventional elastomers include without limitation, natural rubber, neoprene, polybutadiene,
  • the present invention includes a material delivery system
  • delivery system 30 receives the material 12 from a source 13 such as a storage container.
  • Source 13 delivers the material 12 under low pressure through a two-way valve 34 and
  • the manifold cap 38 includes an
  • High pressure cylinder 42 includes a cylinder shaft 44 and a floating piston
  • Material 12 is discharged from high pressure cylinder 42 under the urging of an elongate extrusion screw 50.
  • the gear motor 52 is energized and
  • Nut pulley 56 is fixed about a rotating nut 58 in threaded coaxial engagement with extrusion
  • Extrusion screw 50 is provided with an elongate channel 60 which receives one or
  • Pins 62 prevent extrusion screw 50 from turning with
  • gear motor In driving rotating nut 58, gear motor
  • Material delivery system 30 may provide a constant volumetric flow rate through
  • Gear motor 52 may be operated at varying speeds to vary the volume of material 12
  • nozzle 32 may also be varied, the present invention need only vary the operating speed of
  • Dispense nozzle 32 depends directly downward
  • Remote dispense valve 24 is preferably pneumatically-governed by a shop-air
  • Solenoids (not shown) operated by controller 26 regulate the air governing
  • Dispense nozzle 32 may also be pneumatically driven along a z-
  • Z-axis movement of dispense nozzle 32 may allow, for example,
  • Z-axis movement of dispense nozzle 32 may provide for dispensement
  • nozzle positioning system 28 controls the
  • nozzle 32 will also taper on and off as remote dispense valve is opened and closed,
  • Remote dispense valve 24 is supported on one end of a saddle 66 which is movable
  • Longitudinal arm 68 is
  • transverse arm 70 similarly movably supported on a transverse arm 70 so as to be transversely moved along a
  • transverse arm 70 Preferably, longitudinal arm 68 extends
  • transverse arm 70 perpendicularly to transverse arm 70 so that the first axis is perpendicular to the second axis.
  • longitudinal arm 68 includes a pair of ball rails 71a, 71b, and an
  • Longitudinal arm 68 is
  • Longitudinal arm 68 is similarly supported on a pair of ball rails 75a, 75b within transverse arm 70 and is movable therealong under the
  • Longitudinal arm 68 and transverse arm 70 each include a conventional servo motor
  • controller 26 controls the movement of a drive sprocket 76, 78,
  • control belt 80 operably movable by control belt 80 and longitudinal arm 68 is operably movable by motion
  • control belt 82 so as to provide movement in an x-y plane to dispense nozzle 32.
  • sprockets 76, 78 include a plurality of sprocket teeth 84, 86, which engage belt teeth 88, 90,
  • interference between the two sets of teeth illustrates how such sizing enhances precision
  • belt teeth 88 are engaged by sprocket teeth 84 so as to drive motion control belt 80. Due
  • belt tooth 88 will tend to deflect
  • tooth 88 exerts a
  • tooth 88 exerts a second correction force F2 against the sprocket tooth 84 which trails it.
  • Second correction force F2 acts against rotation in the direction of arrow A and also provides
  • belt 80 will continue to resist rotation by deflecting away from
  • the present invention may also provide a second dispensing mechanism 110 mounted
  • Second dispensing mechanism 110 may include a second
  • remote dispense valve 111 and a second dispense nozzle 113 to provide a second elastomeric
  • Second elastomeric material 12' which will also be described further
  • first material 12 hereinbelow, may be selected to have different properties than first material 12 to enhance
  • mechanism 110 may be designed to inject gasket insert materials into the gasket preform so
  • Saddle 66 may provide yet additional dispensers (not shown) as may be required to
  • Controller 26 directs saddle 66 to move linearly along longitudinal arm 68 and directs
  • longitudinal arm 68 to move linearly along transverse arm 70 to thereby move dispense
  • Controller 26 initiates movement of dispense nozzle 32 from an origin coordinate.
  • the origin coordinate is preferably selected to position dispense nozzle 32 clear of first plate 14 so as to allow first plate 14 to be placed and removed from a dispense area over which
  • dispense nozzle 32 may be directed.
  • second planar plate 16 is brought down to compress gasket preform 20.
  • planar plate 14 and second planar plate 16 may be formed of a machined material such as a
  • Production units will preferably be molded from a material
  • Both plates 14 and 16 are such as a microwave transparent polymer or a ceramic material. Both plates 14 and 16
  • present invention also contemplates dispensing material 12 onto a single use substrate formed
  • both plates 14 and 16 may have etched or otherwise formed thereon, on their respective
  • planar faces 14a and 16a the negative of a surface pattern to be formed on the gasket.
  • plate 14 desirably includes four alignment pins 98a-d positioned adjacent the corners of first
  • Second plate 16 includes four alignment apertures lOOa-d in receiving registry with
  • Pins 98a-d may include a flange portion 99a-d, respectively,
  • a plurality of washers (not shown) having a height h and which act as hard stops to prevent plate 16 from overcompressing gasket preform 20.
  • a plurality of washers (not shown) having a height h and which act as hard stops to prevent plate 16 from overcompressing gasket preform 20.
  • a plurality of washers (not shown) having a
  • central aperture capable of receiving one of pins 98a-d may be provided over each pin to
  • Curing chamber 18 is preferably
  • plates 14 and 16 may be constructed to have opposed planar surfaces
  • Controller 26 allows an operator to select the particular gasket desired to be formed
  • command signals which drive nozzle positioning system 28, open and close remote dispense
  • controller 26 includes a graphic user interface display 27
  • Controller 26 includes an
  • random access memory for execution to form a gasket in accordance with the parameters of
  • the motion control program includes a series of commands for
  • Controller 26 thereby controlling material flow rate from material delivery system 30. Controller 26 thereby
  • dispensed material is compressed between first plate 14 and second plate 16 and cured, the
  • Graphic user interface 27 is desirably operated with only a mouse or cursor control
  • Graphic user interface 27 may prompt
  • Graphic user interface 27 allows the operator to identify, for example, an
  • controller 26 will identify a motion control program by label from the CD-ROM drive.
  • Controller 26 will then search that for the motion control program, load it in the volatile
  • random access memory execute the program, and notify the operator that the trace is
  • Graphic user interface 27 will then prompt the operator to install the second planar plate 16 over first planar plate 14 and place to place the plate assembly in the curing chamber
  • each pre-selected gasket pattern is preloaded and stored on a data
  • controller 26 may be operated to trace a gasket
  • Figure 12 shows by way of illustration and not by
  • Gasket 122 includes a plurality of though-holes curing
  • Dispense nozzle 32 travels over path 120 in two separate passes, a first pass PI and a
  • Pass P2 overlies pass PI in this example, as shown in Figure 13, except at
  • the gasket preform 20 be formed from two overlying passes of dispense
  • Figure 14 shows a cross-sectional view of the gasket preform formed by the bead
  • material 12 may nonetheless still include pockets of air after being dispensed.
  • an air bubble in the dispensed material 12 may result in either a
  • Air bubbles can affect the quality of any gaskets formed from a
  • the bead-on-bead dispense pattern can minimize the effects of air bubbles
  • dispensing method reduces the likelihood of entrapped air extending through two bead
  • passes PI and P2 have off-set starting and ending
  • pass PI may be selected to start and stop
  • dispensing material at point SI on path 120 and pass P2 may be selected to start and stop
  • knit line is where the ends of a dispensed pass of material 12 must be pressed together to form
  • each trace i.e. at its start point SI or its stop point S2, to taper the amount of material on and
  • the present invention therefore provides an apparatus 1 for forming a compression
  • the present invention forms a gasket by compressing a gasket preform of
  • Gaskets formed by the present invention do not require lateral
  • gasket 200 formed by the present invention includes two opposing major surfaces, 202 and
  • major surfaces 202 and 204 may be formed as
  • Figures 16 and 17 provide cross-sectional views of gasket 200 and illustrate the
  • Gaskets formed by the present invention preferably include at least one, and
  • risers 206 increase the sealing efficiency of the gasket by flattening on contact with the
  • Stress risers 206 also provide improved sealing about an imperfection, such
  • stress risers 206 produce localized sealed cells
  • Figures 16 and 17 also depict the different shapes that edges 203 and 205 will assume when formed from a single bead, as in Figure 16, and when formed from
  • Stress risers 206 are formed by dispensing material 12 onto a substrate containing a
  • Figures 10 and 11 show one
  • pyramidal projections 208 are formed having equal longitudinal
  • the width is selected so that a
  • the height (h) is selected such that an increase in
  • portion of a major surface 202 or 204 is independent of the direction in which the gasket is
  • the material 12 may be dispensed onto surface 14a to form a gasket
  • the protrusions 208 on a substrate 14a, 16a that form stress risers 206 may take a
  • the finished gasket includes stress-risers which are symmetrically
  • Such alignment maximizes the sealing efficiency of the gasket of the present invention in that the opposed stress risers provide a higher sealing force than if the peaks 206a and 206b
  • elastomeric material 12 When elastomeric material 12 is dispensed on a single use substrate, such as paper,
  • the protrusion pattern may be produced by stamping, nip rolling,
  • first plate 14 is dispensed on and compressed between a reusable substrate, such as first plate 14 and
  • the protrusion pattern may be permanently etched into the planar surfaces
  • the protrusion pattern on planar surfaces 14a and 16a may be
  • the present invention is also suited to producing gaskets with enhanced capability of
  • Gasket extrusion is the tendency of a flexible
  • invention may be used to trace an additional bead of similar material 12 or different material
  • second dispensing mechanism 110 co-mounted on saddle 66 as shown in Figure 8.
  • second dispensing mechanism 110 includes a second material delivery system (not shown) for
  • Second dispense nozzle 113 would desirably be positionally offset from
  • Figures 18 and 19 depict a gasket 220 formed with a structural bead 222 of material
  • gasket portions 224 and 226 have significant connectivity with bead 222.
  • Figure 20 depicts gasket 220 in place between a first mating surface 230 and a second mating
  • structural bead 222 may have
  • Structural bead 22 may be formed of a material 12' depending on the characteristics desired. Material 12' may be selected from the group of materials from which material 12
  • the present invention may also provide an elastomeric gasket exhibiting enhanced
  • Fracture is the failure of an elastomer to elastically withstand
  • Creep is the tendency of an elastomer to extrude
  • the present invention may provide a gasket 240
  • limiters 242 and cured elastomer 244 create a compliant assembly suitable for forming a seal
  • Gasket 240 is shown by way of illustration and not by
  • Elastomeric compound 244 may formed of any of the materials from which material 12 may be selected.
  • Compression limiters 242 may take the form of rigid inserts 248 or rigid bodies
  • Rigid inserts 248 and rigid bodies 250 are said to be rigid in that either may be formed from any material exhibiting more compressive strength and rigidity than the elastomeric
  • gasket 240 is more resistant to fracture and creep than a similar gasket
  • Rigid inserts 248 are rigid at the time when
  • Rigid bodies 250 harden only after being inserted in the gasket body and may be
  • thermoset or liquid polymer material such as acrylic
  • compression limiters 242 may be placed in the gasket preform
  • an alternate dispensing mechanism 260 which, like secondary dispensing mechanism 110,
  • alternate dispensing mechanism 260 may take the form of a pneumatic injector 262 which is
  • Pneumatic injector 262 is operable with shop air and includes a supply of
  • Rigid inserts 248 are preferably
  • Figure 24 illustrates how a rigid insert 248 may limit
  • dispensing mechanism 260 may be very similar to secondary dispensing mechanism 110 as
  • thermoset or liquid polymer may be dispensed into a pre ⁇
  • rigid bodies 250 are preferably cast from flowable liquids metered into pre-formed cavities 246 designed into the cross-section of the
  • the compression limiters 242 may be
  • elastomeric material 12 may be formed to include a plurality of voids. After curing, the cured
  • preform may be returned to its original position under nozzle positioning system 28 so that an
  • additional dispensing mechanism may inject a compression limiter 244
  • Figure 26 illustrates a rigid body 250 formed within gasket

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Robotics (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un joint à compression présentant un motif de corps de joint prédéterminé. Le procédé comporte les étapes consistant à former une préforme de joint en une matière élastomère fluidifiable, et comprimer la préforme entre deux plaques planes pour former un joint présentant le motif de corps de joint prédéterminé. De plus, un appareil servant à fabriquer un joint à compression comporte une tête de distribution, un générateur de mouvements à commande numérique et un système de stockage et de récupération de données contenant des données servant à diriger le générateur de mouvements à commande numérique en vue de déplacer une tête de distribution. L'appareil comporte également une source de composé élastomère fluidifiable. Le composé élastomère est débité par la tête selon un débit connu à l'intérieur d'un motif de corps de joint prédéterminé. L'appareil comporte en outre une première plaque de pressage comportant un premier substrat, la tête de distribution débitant le composé élastomère fluidifiable sur le premier substrat dans le motif de corps de joint prédéterminé. Une deuxième plaque de pressage comportant un deuxième substrat peut être placée sur le premier substrat sur lequel a été débité le composé élastomère fluidifiable. Le premier et le deuxième substrats peuvent comprimer le composé élastomère débité de façon à obtenir une épaisseur voulue. Le composé comprimé est ensuite cuit pour obtenir un joint à compression.
PCT/US1998/023429 1997-11-04 1998-11-04 Joints et appareil servant a former des joints WO1999022922A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU13033/99A AU1303399A (en) 1997-11-04 1998-11-04 Gaskets and method and apparatus for forming gaskets

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US96427197A 1997-11-04 1997-11-04
US08/964,271 1997-11-04

Publications (2)

Publication Number Publication Date
WO1999022922A2 true WO1999022922A2 (fr) 1999-05-14
WO1999022922A3 WO1999022922A3 (fr) 2000-02-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/023429 WO1999022922A2 (fr) 1997-11-04 1998-11-04 Joints et appareil servant a former des joints

Country Status (2)

Country Link
AU (1) AU1303399A (fr)
WO (1) WO1999022922A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008148630A1 (fr) * 2007-06-04 2008-12-11 Robert Bosch Gmbh Procédé et dispositif de fabrication de joints
US7887063B2 (en) 2004-06-07 2011-02-15 Federal-Mogul World Wide, Inc. Gasket for sealing multiple fluids

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DE644695C (de) * 1932-12-11 1937-05-11 Franz Braun Akt Ges Spritzgussmaschine fuer plastische Massen
US2961713A (en) * 1957-05-09 1960-11-29 Parker Hannifin Corp Molding of o-rings and the like
GB929476A (en) * 1961-03-13 1963-06-26 Felt Products Mfg Co Manufacture of gaskets and the like
FR1396544A (fr) * 1964-03-13 1965-04-23 Presse pour le moulage par injection de matières plastiques
FR1445440A (fr) * 1964-08-28 1966-07-08 Dowty Seals Ltd Procédé de formation de joints du type face à face et produits obtenus par ce procédé
US3260125A (en) * 1964-07-08 1966-07-12 Dolza John Gear drive assembly
DE1650653B1 (de) * 1967-10-13 1971-03-04 Continental Gummi Werke Ag Zahnriementrieb
DE2036657A1 (de) * 1969-10-22 1971-04-29 Federal Mogul Corp Dichtungskörper und Verfahren zu seiner Herstellung
US4273607A (en) * 1979-11-01 1981-06-16 Paul William A Apparatus for applying gasket-forming material
EP0182391A2 (fr) * 1984-10-22 1986-05-28 TAKO S.p.A. Procédé pour la fabrication de joints d'étanchéité renforcés, et joint fabriqué d'après le procédé
DE3510740A1 (de) * 1985-03-25 1986-09-25 Mitsuboshi Belting Ltd., Kobe, Hyogo Zahnriemenaufbau aus polyurethan
EP0416653A2 (fr) * 1989-09-08 1991-03-13 Norton Company Procédé et dispositif pour la fabrication d'un joint sur une surface d'un objet
EP0483981A1 (fr) * 1990-10-29 1992-05-06 Alan B. Aronie Pistolet pour cartouches de calfatage
WO1992019435A1 (fr) * 1991-04-25 1992-11-12 Wk Worek Kunststofftechnik Gmbh Extrudeur de pate
EP0558033A1 (fr) * 1992-02-28 1993-09-01 Dow Corning Toray Silicone Company, Limited Méthode d'étanchéification d'un corps structurel en forme de récipient
DE4226999A1 (de) * 1992-08-14 1994-07-07 Mueller Wilhelm H Gmbh Zahnriementrieb
EP0654962A1 (fr) * 1993-11-22 1995-05-24 EMI-TEC, ELEKTRONISCHE MATERIALIEN GmbH Membre de blindage et procédé de fabrication d'un tel membre
FR2732625A1 (fr) * 1995-04-10 1996-10-11 Fechino Mireille Latapy Distributeur de produit visqueux, pateux ou liquide

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DE644695C (de) * 1932-12-11 1937-05-11 Franz Braun Akt Ges Spritzgussmaschine fuer plastische Massen
US2961713A (en) * 1957-05-09 1960-11-29 Parker Hannifin Corp Molding of o-rings and the like
GB929476A (en) * 1961-03-13 1963-06-26 Felt Products Mfg Co Manufacture of gaskets and the like
FR1396544A (fr) * 1964-03-13 1965-04-23 Presse pour le moulage par injection de matières plastiques
US3260125A (en) * 1964-07-08 1966-07-12 Dolza John Gear drive assembly
FR1445440A (fr) * 1964-08-28 1966-07-08 Dowty Seals Ltd Procédé de formation de joints du type face à face et produits obtenus par ce procédé
DE1650653B1 (de) * 1967-10-13 1971-03-04 Continental Gummi Werke Ag Zahnriementrieb
DE2036657A1 (de) * 1969-10-22 1971-04-29 Federal Mogul Corp Dichtungskörper und Verfahren zu seiner Herstellung
US4273607A (en) * 1979-11-01 1981-06-16 Paul William A Apparatus for applying gasket-forming material
EP0182391A2 (fr) * 1984-10-22 1986-05-28 TAKO S.p.A. Procédé pour la fabrication de joints d'étanchéité renforcés, et joint fabriqué d'après le procédé
DE3510740A1 (de) * 1985-03-25 1986-09-25 Mitsuboshi Belting Ltd., Kobe, Hyogo Zahnriemenaufbau aus polyurethan
EP0416653A2 (fr) * 1989-09-08 1991-03-13 Norton Company Procédé et dispositif pour la fabrication d'un joint sur une surface d'un objet
EP0483981A1 (fr) * 1990-10-29 1992-05-06 Alan B. Aronie Pistolet pour cartouches de calfatage
WO1992019435A1 (fr) * 1991-04-25 1992-11-12 Wk Worek Kunststofftechnik Gmbh Extrudeur de pate
EP0558033A1 (fr) * 1992-02-28 1993-09-01 Dow Corning Toray Silicone Company, Limited Méthode d'étanchéification d'un corps structurel en forme de récipient
DE4226999A1 (de) * 1992-08-14 1994-07-07 Mueller Wilhelm H Gmbh Zahnriementrieb
EP0654962A1 (fr) * 1993-11-22 1995-05-24 EMI-TEC, ELEKTRONISCHE MATERIALIEN GmbH Membre de blindage et procédé de fabrication d'un tel membre
FR2732625A1 (fr) * 1995-04-10 1996-10-11 Fechino Mireille Latapy Distributeur de produit visqueux, pateux ou liquide

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7887063B2 (en) 2004-06-07 2011-02-15 Federal-Mogul World Wide, Inc. Gasket for sealing multiple fluids
US8157269B2 (en) 2004-06-07 2012-04-17 Federal-Mogul World Wide, Inc. Gasket for sealing multiple fluids
WO2008148630A1 (fr) * 2007-06-04 2008-12-11 Robert Bosch Gmbh Procédé et dispositif de fabrication de joints

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