Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/30—Partial laminating
• • 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
  • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
• • 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
  • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
• • 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
  • B29C65/82—Testing the joint
  • B29C65/8207—Testing the joint by mechanical methods
  • B29C65/8246—Pressure tests, e.g. hydrostatic pressure tests
• • 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
  • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
  • B29C66/124—Tongue and groove 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
  • B29C66/01—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
  • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
  • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
  • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
• • 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
  • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
  • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
• • 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
  • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
  • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
  • B29C66/30221—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being point-like
• • 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
  • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
  • B29C66/322—Providing cavities in the joined article to collect the burr
• • 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
  • B29C66/343—Making tension-free or wrinkle-free 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
  • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
• • 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
  • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
  • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
  • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
  • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
• • 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
  • B29C66/80—General aspects of machine operations or constructions and parts thereof
  • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
  • B29C66/832—Reciprocating joining or pressing tools
  • B29C66/8322—Joining or pressing tools reciprocating along one axis
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/10—Air intakes; Induction systems
  • F02M35/10314—Materials for intake systems
  • F02M35/10321—Plastics; Composites; Rubbers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/10—Air intakes; Induction systems
  • F02M35/1034—Manufacturing and assembling intake systems
  • F02M35/10354—Joining multiple sections together
  • F02M35/1036—Joining multiple sections together by welding, bonding or the like
• • 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
  • 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
  • B29C66/712—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 the composition of one of the parts to be joined being different from the composition of the other part
• • 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
  • B29C66/90—Measuring or controlling the joining process
  • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
  • B29C66/959—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables
• • 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
  • B29L2031/712—Containers; Packaging elements or accessories, Packages
  • B29L2031/7172—Fuel tanks, jerry cans
• • 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
  • B29L2031/748—Machines or parts thereof not otherwise provided for
  • B29L2031/749—Motors
  • B29L2031/7492—Intake manifold
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T403/00—Joints and connections
  • Y10T403/47—Molded joint
  • Y10T403/477—Fusion bond, e.g., weld, etc.

Definitions

• the invention generally relates to an article. More specifically, the invention relates to a frictional weld joint for an article, which comprises a thermoplastic material.
• a typically frictional weld joint comprises a first bead extending from the first body portion and a second bead extending from the second body portion.
• Each of the first and second beads of the typically frictional weld joint has a contact surface.
• the contact surfaces of the first and second beads are placed into contact with each other and a force is applied to the first body portion to generate friction at the contact surface of the first and second beads.
• the first and second beads are made from a thermoplastic material and the friction results in an increased temperature of the thermoplastic material. As a result of the increased temperature of the thermoplastic material, the first and second beads nest with one another.
• the force is removed from the first body portion for allowing the thermoplastic material to cool, which results in the first and second beads fusing together.
• small amounts of the thermoplastic material break off from the first and second beads as flash.
• Small amounts of flash may be beneficial as a way of clearing the contact surfaces of dirt and sediment that might interfere with the fusing of the first and second beads.
• large amounts of flash result in waste and therefore increase manufacturing cost.
• large amounts of flash can also interfere with the frictional weld joint thereby decreasing a strength of the frictional weld joint.
• the flash generated may become loose during the intended life of the article resulting in failure of the frictional weld joint and possibly other components.
• the flash may become loose and can mix with an air- fuel mixture and eventually get into the engine system, which is undesirable.
• the generation of flash is an indication of heat losses during the nesting of the first and second beads, which can potentially have a negative impact on a desired total penetration to be achieved by the first and second beads and therefore should be minimized as a good manufacturing practice. Therefore, there remains a need to provide an improved frictional weld joint.
• a frictional weld joint couples together a first body portion and a second body portion of an article, which comprises a thermoplastic material.
• the first body portion has a first joint surface and the second body portion has a second joint surface, which is parallel with the first joint surface.
• the frictional weld joint comprises a first bead coupled to the first body portion and extending axially along a centerline from the first joint surface.
• the frictional weld joint also comprises a second bead coupled to the second body portion and extending axially along a centerline from the second joint surface.
• a force is applied to either the first or second body portions of the article to generate friction between the first and second beads.
• the friction plastically displaces the first and second beads. The force is removed for fusing the first and second beads together to couple together the first body portion and the second body portion of the article.
• the second bead has an interior stem and an exterior stem space from the interior stem defining a cavity therebetween for receiving an amount of flash, which results from the fusing of the first and second beads.
• the first and second beads are placed in contact with each other with the centerline of the second bead offset from the centerline of the first bead. Offsetting the centerlines reduces stresses acting on the frictional weld joint as a result of stresses that act on the first and second body portions. A strength of the frictional weld joint is increased with the reduction of stresses transferred to the frictional weld joint. Therefore, the article can experience greater pressures without the frictional weld joint failing, as compared to prior art weld joints.
• Figure 1 is a perspective view of an article for use as an air intake manifold for an internal combustion engine
• Figure 2 is a cross-sectional view of the article taken along line 2-2 of
• Figure 1 is a cross-sectional view of a portion of Figure 2 showing a frictional weld joint;
• Figure 4 is cross-section view of a portion of Figure 2 showing the frictional weld joint with a second bead penetrating a first bead;
• Figure 5 is a perspective view of the article as a test article having a joint
• Figure 6 is a cross-sectional view of the test article of Figure 5 showing the joint as the frictional weld joint.
• Figure 7 is a cross-sectional view of the test article of Figure 5 showing the joint as an alternative joint design.
• an article is generally shown at 10. As shown in Figures 1 and 2, the article 10 is formed as an air intake manifold for an internal combustion engine. However, it should be understood that the article 10 may be formed into something other than the air intake manifold, such as automotive front and rear tail lamp housings, fuel tanks, or any application wherein two components are joined together using a vibration welding process and still fall within the scope of the disclosure.
• the article 10 comprises a thermoplastic material.
• the thermoplastic material can be neat, i.e., virgin, uncompounded resin, or that the thermoplastic material can be an engineered product where the resin is compounded with other components, for example with select additives to improve certain physical properties.
• the thermoplastic material may have a regrind content of from about 5-25 percent.
• the thermoplastic material is selected from the group of polypropylene, polyvinyl chloride, polystyrene, acrylonitrile butadiene styrene, styrene butadiene, acrylic styrene acrylonitrile, poly methyl methacrylate, polyacetal, polyphenylene oxide, polyethylene terephthalate, polyethylene, polyphenylene sulfide, cellulose acetate, polysulfone, polybutylene terephthalate, polyamide, and combinations thereof.
• the thermoplastic material is a polyamide selected from the group of nylon 6, nylon 6/6, polybutylene terephthalate, polyethylene terephthalate, polyacetal, acrylic styrene acrylonitrile, and combinations thereof.
• the thermoplastic material may be a blend of two or more of the above listed materials.
• the thermoplastic material may be selected from the group of polyamide blends, a polypropylene and ethylene propylene diene monomer blend, polyphenylene oxide blends, a polycarbonate and acrylonitrile butadiene styrene polymer blend, and a polycarbonate and polybutylene terephthalate blend.
• the thermoplastic material is typically between 5 and 65 percent filled with fibers, and more preferably, the thermoplastic material is 30 percent filled with fibers. It is to be appreciated that the fibers may be glass fibers.
• suitable thermoplastic materials include, but are not limited to Ultramid® polyamides, Ultradur®, Ultraform®, Ultrason®, Luran®, and Terluran® grades commercially available from BASF Corp.
• the article 10 comprises a first body portion 12 and a second body portion 14.
• the first and second body portions 12, 14 are configured for coupling with one another to form the article 10. Said differently, when the first and second body portions 12, 14 are coupled together, the first and second body portions 12, 14 define the article 10.
• each of the first and second body portions 12, 14 have a joint surface 16.
• the first body portion 12 has a first joint surface 16A and the second body portion 14 has a second joint surface 16B.
• the second joint surface 16B is parallel to the first joint surface 16 A.
• a frictional weld joint 18 is disposed between the first and second joint surfaces 16A, 16B. The frictional weld joint 18 couples together the first and second body portions 12, 14 to form the article 10.
• a method is used to couple together the first and second body portions 12, 14 via the frictional weld joint 18.
• the frictional weld joint 18 comprises a first bead 20 coupled to the first joint surface 16A.
• the first bead 20 extends axially along a centerline 22 from the first joint surface 16A.
• the frictional weld joint 18 also comprises a second bead 24 coupled to the second joint surface 16B.
• the second bead 24 extends axially along a centerline 26 from the second joint surface 16B.
• Each of the first and second beads 20, 24 has a contact surface 28 spaced from a respective one of the first joint surface 16A or the second joint surface 16B.
• the first and second beads 20, 24 define a cross-sectional area of the contact surface 28.
• the first and second beads 20, 24 each have a height H defined between a respective one of the first joint surface 16A or the second joint surface 16B and the contact surface 28 of the first or second beads 20, 24, respectively.
• the height H of the first and second beads 20, 24 is typically less than about 5.0, more typically of from about 2.0 to about 4.0, and even more typically of from about 2.7 to about 3.5 millimeters. It is to be appreciated that the first and second beads 20, 24 may have different height as compared to each other or, in some instances, one of the first and second beads 20, 24 may be eliminated depending on space restrictions. For example, the first bead 20 may be shorter or longer than the second bead 24.
• first and second beads 20, 24 may have any suitable cross-sectional configuration.
• each of the first and second beads 20, 24 may have a rectangular cross-section, or a circular cross-section.
• first bead 20 may have a different cross-section as compared to the second bead 24.
• first bead 20 may have the rectangular cross- section and the second bead 24 may have the circular cross-section.
• the first and second beads 20, 24 comprise the thermoplastic material of the article 10.
• the first and second beads 20, 24 may comprise unfilled and/or glass filled nylon, nylon 6/6, polyvinyl chloride, polybutylene terephthalate, polyacetal, and combinations thereof. It is to be appreciated that the first and second beads 20, 24 may comprise a different thermoplastic material as compared to the thermoplastic material of the first and second body portions 12, 14.
• the second bead 24 Prior to coupling the first and second body portions 12, 14 together, the second bead 24 is spaced from the first bead 20.
• the first and second beads 20, 24 are positioned in contact with each other with the centerline 22 of the second bead 24 offset from the centerline 26 of the first bead 20. More specifically, the contact surface 28 of each of the first and second beads 20, 24 is positioned in contact with each other.
• a clamp pressure may be applied to the first and second body portions 12, 14 to temporarily hold the first and second body portions 12, 14 together.
• the clamp pressure is typically of from about 1.0 to about 7.0, more typically of from about 1.2 to about 4.0, even more typically of from about 1.5 to about 2.5 Mpa.
• a force is applied to either the first or second body portions 12, 14 of the article 10 to generate friction between the first and second beads 20, 24.
• the application of the force results in the production of friction between the contact surface 28 of the first and second beads 20, 24.
• the friction generates heat that results in a heating of the thermoplastic material of the first and second beads 20, 24 from a normal temperature towards a melting temperature of the thermoplastic material.
• the application of the force may be further defined as frictionally welding the first and second beads 20, 24 together such that one of the first or second body portions 12, 14 reciprocate against the other one of the first and second beads 20, 24 at a low frequency.
• the low frequency used in the frictional welding is of from about 100 to about 300, more typically of from about 150 to about 240, and even more typically of from about 180 to about 220 hertz.
• the application of the force may be further defined as ultrasonically welding the first and second beads 20, 24 together such that one of the first or second body portions 12, 14 reciprocate against the other one of the first and second beads 20, 24 at a high frequency.
• the high frequency used in ultrasonic welding is typically of from about 15,000 to about 72,000, more typically of from about 15,000 to about 60,000, and even more typically of from about 15,000 to about 40,000 hertz.
• the heating of the first and second beads 20, 24 allows either the first or second beads 20, 24 to penetrate the other one of the first and second beads 20, 24, as shown in Figure 4. Said differently, as the thermoplastic material of the first and second beads 20, 24 approaches the melting temperature of the thermoplastic material, one of the first or second beads 20, 24 penetrates the other. It is to be appreciated that the pressure holding the first and second beads 20, 24 together may also be present during the step of applying the force to help force the first or second beads 20, 24 to penetrate the other one of the first and second beads 20, 24. The heating of the first and second beads 20, 24 also results in the production of flash 30. Therefore, the article 10 may also have a pair of flash dams 32 for containing the spread of the flash 30.
• the flash dams 32 are coupled to at least one of the first and second body portions 12, 14. Typically, the flash dams 32 are coupled to the second body portion 14, which has the second weld bead 24. Generally, the flash dams 32 are spaced from the first and second beads 20, 24 and are parallel to the first and second beads 20, 24. The flash dams 32 collect the flash 30 within the weld frictional weld joint 18 thereby preventing the flash 30 from becoming loose within the article 10.
• the force is removed for allowing the first and second beads 20, 24 to fuse together to couple together the first body portion 12 and the second body portion 14 of the article 10.
• the heat that was generated by the friction rapidly dissipates and the thermoplastic material of the first and second beads 20, 24 fuse together as the normal temperature of the first and second beads 20, 24 is reached.
• the force is applied to the first body portion 12 to allow the second bead 24 to penetrate the first bead 20.
• the second bead 24 is at least partially disposed within the first bead 20 after the force is removed from the first body portion 12.
• the second bead 24 penetrates the first bead 20 by a distance Dl of from about 0.25 to about 2.20 millimeters, more typically of from about 1.00 to about 2.00 millimeters, and even more typically of from about 1.50 to about 1.80 millimeters.
• the second bead 24 may penetrate the first bead 20 such that the second bead 24 is fully encompassed by the first bead 20.
• the second bead 24 has an interior stem 34 and an exterior stem 36 spaced from the interior stem 34 defining a cavity 38 therebetween. It is to be appreciated the interior stem 34 is proximate an interior of the article 10 and the exterior stem 36 is distal the interior of the article 10. Because the interior and exterior stems 34, 36 can be spaced from one another to define the cavity 38, the flash 30 that is produce can be captured in the cavity 38. Capturing the flash 30 prevents the flash 30 from entering the article 10.
• the cavity 38 between the interior and exterior stems 34, 36 has a width typically of from about 1.50 to about 7.00, more typically of from about 3.00 to about 6.00, and even more typically of from about 4.00 to about 5.00 millimeters.
• a thickness Tl of the first bead 20 is uniform between the first joint surface 16A of the article 10 and the contact surface 28 of the first bead 20. Additionally, the thickness of the first bead 20 is less than a thickness T2 of the first joint surface 16A.
• the thickness Tl of the first bead 20 is of from about 3.00 to about 8.00, more typically of from about 4.00 to about 7.00, and even more typically of from about 6.00 to about 7.00 millimeters.
• a thickness T3 of the second bead 24 is of from about 1.50 to about 7.00, more typically of from about 3.00 to about 6.00, and most typically of from about 4.00 to about 5.00 millimeters.
• the thickness T3 of the second bead 24 is defined by a thickness T4 of the interior stem 34, a width W of the cavity 38, and a thickness T5 of the exterior stem 36.
• the thickness T4 of the interior stem 34 of the second bead 24 is typically of from about 2.50 to about 3.5, more typically of from about 2.00 to about 3.00, and even more typically of from about 2.40 to about 2.60 millimeters.
• the width of the cavity is typically of from about 1.50 to about 7.00, more typically of from about 3.00 to about 6.00, and even more typically of from about 4.00 to about 5.00 millimeters.
• the thickness T5 of the exterior stem 36 of the second bead 24 is typically of from about 1.10 to about 2.50 and more typically of from about 0.90 to about 1.20 millimeters.
• the article 10 has an interior chamber 38 defined by the first and second body portions 12, 14.
• the frictional weld joint 18 is disposed about the interior chamber 38.
• the chamber may undergo a pressure increase.
• pressure increases within the air intake manifold.
• the pressure increase causes a moment force to act on the frictional weld joint 18.
• the moment force results in a combination of a bending load, a tensile load, and a compressive load acting on the frictional weld joint 18.
• the frictional weld joint 18 must be able to withstand stresses imparted on the frictional weld joint 18 due to the bending, tensile, and compressive loads without failure.
• the centerline 22 of the first bead 20 is offset from the centerline 26 of the second bead 24.
• the centerlines 22, 26 of the first and second beads 20, 24 are offset for reducing stresses acting on the frictional weld joint 18 as a result of stresses acting on the first and second body portions 12, 14.
• An example of stresses acting on the first and second body portions 12, 14 is increased pressure within the interior chamber 38.
• a strength of the frictional weld joint 18 is increased with the reduction of stresses transferred to the frictional weld joint 18. Therefore, the article 10 can experience greater pressures without the frictional weld joint 18 failing, as compared to other weld joints that are not offset.
• the centerline 26 of the second bead 24 is offset from the centerline 22 of the first bead 20 a distance D2 of from about 0.20 to about 0.80, more typically of from about 0.20 to about 0.70, and even more typically of from about 0.20 to about 0.50 millimeters.
• Reducing the thickness of the second bead 24 also reduced the cross-sectional area of the contact surface 28 of the second bead 24, which results in less flash 30 being produced during the method of frictional welding because there is less interaction between the contact surface 28 of the first and second beads 20, 24.
• the thickness Tl of the first bead 20 is about 6 millimeters and the thickness T3 of the second bead 24 is about 4.6 millimeters.
• the thickness T4 of the interior stem 34 is about 2.5 millimeters
• the thickness T5 of the exterior stem 36 is about 1.1 millimeters
• the width W of the cavity 38 is about 1.0 millimeters.
• the centerline 22 of the second bead 24 is offset a distance Dl of about 0.2 millimeters from the centerline 22 of the first bead 20.
• the frictional weld joint 18 can be used to couple together any thermoplastic bodies, including multiple article 10s. It is to be appreciated that although the second bead 24 has been described as being split into the interior and exterior stems 34, 36, the first bead 20 may be split into the interior and an exterior stem 36. Additionally, it is also to be appreciated that both the first and second beads 20, 24 may be split into the interior and exterior beads.
• test articles 40 are produced.
• An example of the test articles 40 is shown in Figure 5.
• the test articles 40 have the first and second body portions 12, 14 joined together by a joint 42.
• the test articles 40 are divided into two groups. More specifically, the test articles 40 are divided in Group A test articles and Group B test articles.
• the Group A test articles have the frictional weld joint 18, as described above, and is shown in Figure 6.
• the Group B test articles have an alternative weld joint, which is shown in Figure 7.
• the Group A test articles include the first bead 20 having a thickness of 6.0 millimeters and the second bead 24 having a thickness of 4.6 millimeters.
• the second bead 24 is split into the interior stem 34, which has a thickness of 2.5 millimeters, the exterior stem 36, which has a thickness of 1.1 millimeters, and the cavity 38, which has a width of 1.0 millimeters.
• the second bead 24 has a total thickness of 4.6 millimeters.
• the centerlines 22, 26 of the first and second beads 20, 24 are offset 0.2 millimeters from one another.
• a cross-section showing the frictional weld joint 18 of the Group A test articles with dimensions is shown in Figure 6.
• the Group B test articles have the alternative weld joint, which has an upper bead 44, which has thickness of 6.0 millimeter, and a lower bead 46, which has a thickness of 4.0 millimeter thickness.
• the upper and lower beads 44, 46 of the Group B test articles have a common centerline 48.
• a cross-section showing the alternative weld joint of the Group B test articles is shown in Figures 7.
• the cross-sectional area of the contact surface of the second bead 24 of the Group A test articles 40 is less than a cross- sectional area of a contact surface of the lower bead 46 of the Group B test articles. More specifically, the second bead 24 of the Group A test articles has a total thickness of 4.6 millimeters with the cavity 38 occupying 1.0 millimeters of the total width. Therefore, cross-sectional area of the contact surface of the second bead 24 of the Group A test articles 40 is only defined by the interior and exterior stems 34, 36, which has a combined thickness of 3.6 millimeters. The cross-section area of the contact surface of the lower bead 46 of the Group B test articles is defined by the full thickness of the lower bead 46, which is 4.0 millimeters.
• a first pressure failure test is conducted on the Group A and Group B test articles to determine a pressure at which the frictional weld joint 18, in the case of the Group A test articles, or the alternative weld joint in the case of the Group B test articles, fails.
• the first and second body portions 12, 14 are coupled together using the method described above to form the Group A and Group B test articles.
• the force is applied to the Group A and Group B test articles until, in the case of the Group A test articles the second bead 24 penetrates the first bead 20 or in the case of the Group B test articles the lower bead 46 penetrates the upper bead 44, by about 1.5 millimeters.
• the force is removed and the first and second body portions 12, 14 are fused together.
• the clamp pressure applied during the coupling of the first and second body portions 12, 14 is varied to produce Group A and the Group B test articles formed under different clamp pressures. Once the first and second body portions 12, 14 are coupled together, air is injected into the interior chamber 38 until the frictional weld joint 18 or the alternative weld joint fails. The results are shown in Table 1 below.
• the Group A test articles which have the frictional weld joint 18, are able to withstand higher pressures within the internal chamber before failure. More specifically, between the four clamp pressures tested, the frictional weld joint 18 of the Group A test articles was able to withstand pressures that were on average 12% higher compared to the alternative weld joint of the Group B test articles. As described above, this was unexpected because the Group B test articles had a larger cross-section area of the contact surface relative to the cross-sectional area of the contact surface of the Group A test articles. It is believed that the ability of the Group A test articles to withstand higher pressures is the result of limiting the stresses acting on the interior stem 34 and the exterior stem 36 by splitting the second bead 24 and offsetting the centerline 22 of the first and second beads 20, 24.

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• 2012
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