EP0621807A1 - Procede pour mouler un composant non metallique sur une barre metallique - Google Patents

Procede pour mouler un composant non metallique sur une barre metallique

Info

Publication number
EP0621807A1
EP0621807A1 EP93902377A EP93902377A EP0621807A1 EP 0621807 A1 EP0621807 A1 EP 0621807A1 EP 93902377 A EP93902377 A EP 93902377A EP 93902377 A EP93902377 A EP 93902377A EP 0621807 A1 EP0621807 A1 EP 0621807A1
Authority
EP
European Patent Office
Prior art keywords
bar
moulding
onto
component
masking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP93902377A
Other languages
German (de)
English (en)
Inventor
John Russell 41 Lang Road Finch
Philip Ferdani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tempered Spring Co Ltd
Original Assignee
Tempered Spring Co Ltd
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 Tempered Spring Co Ltd filed Critical Tempered Spring Co Ltd
Publication of EP0621807A1 publication Critical patent/EP0621807A1/fr
Withdrawn legal-status Critical Current

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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/681—Component parts, details or accessories; Auxiliary operations
    • B29C70/683—Pretreatment of the preformed part, e.g. insert
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/74—Moulding material on a relatively small portion of the preformed part, e.g. outsert moulding
    • 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
    • B29L2031/04—Bearings
    • B29L2031/045—Bushes therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/13—Torsion spring
    • B60G2202/135—Stabiliser bar and/or tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/122—Mounting of torsion springs
    • B60G2204/1222—Middle mounts of stabiliser on vehicle body or chassis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/44—Centering or positioning means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/90—Maintenance
    • B60G2206/91—Assembly procedures

Definitions

  • This invention relates to a method of manufacturing a bushed bar by the moulding onto a prepared bar at one or more predefined moulding positions integral non-metallic collar or bush components.
  • 'bar' is used in this specification for convenience of expression and unless specified as otherwise may, in its most general sense, mean not only an elongate solid object of round cross-section but also any non solid object, such as a tube or pipe, of any cross-sectional shape.
  • Bars having such integrally moulded non-metallic components are often employed in situations where the bar is mounted on, and required to undertake restricted movements relative to, a body and the moulded non-metall c components may be required to permit the bar to undergo unlimited or restricted movement in one direction relative to the body whilst restraining it from motion in another direction, often against considerable force.
  • Such a non- metallic component may form a mounting bush for the bar and/or simply provide a collar for limiting axial motion relative to the body.
  • Such restraint is due entirely to the strength of moulding bond between the non-metallic part and the bar but other manufacturing operations which require to be performed for technical and/or commercial reasons may conflict with and point towards compromising of an optimum bond.
  • bushed bars are manifold and any may benefit from the method to be described herein this method is particularly applicable to, and will be described in relation to, a stabiliser bar of the type used in motor vehicles to counter body roll.
  • Such a stabiliser, or anti-roll, bar is formed from steel rod having suitable torsion characteristics and mounted to the chassis of the vehicle by non-metallic components such as bushes of rubber or plastics material which are moulded integrally onto the bar at at least one, and usually a plurality of, predefined moulding positions along the bar.
  • Such bushes serve to permit rotational motion of the bar about its longitudinal axis relative to the chassis, differential rotation along its length deriving torsional reaction forces to counter chassis roll.
  • Such a stabiliser bar having at least one non-metallic component integrally moulded thereto is described in British Patent specification No. 2,239,440.
  • integrally is used in relation to the moulding to mean that the component is formed to its final shape and bonded to the bar simultaneously from the melt by a moulding tool through which the bar passes, and is distinguished from a situation in which a pre-moulded component is simply secured to the bar.
  • a stabiliser bar formed of steel to be employed in an exposed location under a vehicle requires to be given a protective surface coating of, for example, paint, but methods that comply with economical manufacture do not provided the bonding strength against lateral forces outlined above.
  • the method of applying paint, or any other surface protection may be varied if desired, possibly to one not requiring per se extremes of temperature, it is seen as desirable to provide uniformity by confining the moulding of a collar of shorter axial length than such a mounting bush also to after the surface protection has been applied to the bar, but differing by the provision at an appropriate location, conveniently termed a moulding position, of a bar surface from which the paint or other surface protection material is absent so that superior bonding of the moulded component is effected.
  • a method of manufacturing a metal bar having at least one non-metallic component integrally moulded onto the bar at an individual moulding position along the bar comprises cleaning the surface of the bar, masking the surface of the cleaned bar, at each moulding position, about its periphery for an axial distance along the bar with a meltable material, depositing surface protection material on the masked bar, subjecting the bar to a temperature above the melting point of the mask material to expose the unprotected bar surface at each moulding position, and moulding on the bar at each moulding position a non- metallic component.
  • a bar has a surface coating of protective material bonded thereto except for an axially extending uncoated portion of the bar at at least one moulding position along the bar and at each moulding position a non-metallic component, moulded integrally onto the bar, having a centre portion thereof moulded onto the uncoated bar portion and the end portions thereof moulded onto the coated bar portions each side of the uncoated moulding position.
  • Figure 1 is a sectional elevation through a portion of a vehicle stabiliser bar showing a collar of thermoplastics material integrally moulded onto a painted bar using known production methods.
  • Figure 2(a) is a perspective view of a stabiliser bar, according to the present invention, at an early stage of manufacture wherein the cleaned shot peened bar has, at one or more moulding positions, the surface masked by the application of a loop of meltable plastics adhesive tape,
  • Figure 2(b) is a perspective view of the stabiliser bar of Figure 2(a) showing the bar masked at each moulding position
  • Figure 3 is a sectional elevation through the bar of Figure 2(b) after painting and being subjected to high temperature to melt off the tape mask(s)
  • Figure 4 is a sectional elevation through a portion of a finished bar according to the present invention and showing the bar of Figure 3 after having a collar of thermoplastics material integrally moulded thereon at the unpainted moulding position.
  • the British patent specification No. GB 2,239,440 describes a vehicle stabiliser or anti- roll bar having one or more non-metallic components integrally moulded thereon and includes examples of a bar structure and methods of manufacture.
  • Figure l this shows a sectional elevation through a portion of such a bar 10 on which is moulded an axially short collar 11 to prevent axial displacement of the bar when mounted on a vehicle.
  • the surface 12 of the bar has been shot peened both to condition the surface for torsion stresses to which it will be subjected in use and to provide a rough surface key for the surface protection paint.
  • the paint is applied by spraying electrostatically charged powder onto the bar and passing the coated bar through an oven which raises the bar to a temperature of above 180°C (air temperature about 300°C) to fuse the paint into a uniform coat 13. Subsequently the collar 11 is moulded onto the painted surface. As indicated above the bonding provided by the plastics material to the paint, coupled with the small bonded area due to the short axial length of the collar, is insufficient for some needs.
  • a bar 20 is formed to the desired shape and stress relieved, if necessary, and then shot peened to clean and prepare the surface to the extent necessary and desirable for having a thermoplastics component integrally moulded thereonto and a protection surface coat of paint.
  • the bar surface is masked by applying a loop of meltable, adhesive tape 22.
  • a thin self-adhesive tape of polyvinyl chloride (PVC) film coated with a thermoplastic pressure sensitive adhesive is suitable and many such tapes are commercially available primarily intended for other applications.
  • a preferred material is a PVC based tape having a low tack adhesive intended for protecting embossed or coarsely ground surfaces against abrasion and available from W K West Limited of Sheffield, United Kingdom, as Vinyl Protection Tape (1540) .
  • Such tape has a total thickness of 0.04mm.
  • An alternative suitable material is a 0.035mm base thickness, 0.057mm total thickness, PVC based tape intended primarily for electrical insulation purposes and available from the above named source as Sellotape (RTM) Vinyl Electrical Tapes 1513/14.
  • the tape is applied to all moulding positions simultaneously by means of a multiple-head tape dispenser 23 which operates by a reciprocal motion of the bar relative to the dispenser.
  • the masked bar 20, with its loop or loops of tape 22 (22') is illustrated in Figure 2(b).
  • the axial length of the tape mask at each moulding position is chosen to be slightly less than the axial length of the collar to be moulded at that position by an amount, determined in accordance with the positioning accuracy of the bar for both masking and moulding operations, that is sufficient to ensure that none of the bar surface covered by the mask 22 is subsequently not covered by the moulded collar 11.
  • the masked bar 20 of Figure 2(b) is thereafter coated with paint powder and subjected to an elevated temperature high enough not only to fuse the paint into a durable coating but also to melt each of the tape masks at least to the extent of causing the tape to shrivel and fall off, or even to flow or evaporate, such that when the painted bar emerges from the painting process it has with no further intervention an exposed, that is, unpainted, shot-peened surface at each moulding position.
  • the final stage of the manufacture comprises integrally moulding a collar 27 onto the prepared bar at elevated temperature.
  • the collar may be of any suitable material but, for ease of manufacture, conveniently comprises a thermoplastics material and for also providing strength against lateral forces may comprise a glass fibre reinforced, mineral filled polyphenylene sulphide composition, such as sold under the trade name FORTRON 6165A4 by Hoechst AG.
  • the axial length X of the moulded component exceeds that x of the unpainted bar at the moulding position.
  • the difference in length (X-x) need only be sufficient to ensure that any positional tolerances in placing the bar relative to the masking station and later relative to the moulding station results in the painted portion always being covered by the moulded collar, and not exposed to corrosion.
  • a length difference may be of the order to 1mm giving a positional tolerance for masking and moulding of +/- 0.5mm.
  • the above description relates to the production of a stabiliser bar with an axially short collar and painted in a manner which uses a paint fusing temperature that is also high enough to remove the mask material cleanly
  • the method may be employed to produce bars of any metal and of any type or cross- sectional or rectilinear shape for any purpose that requires the surface to be given a protective coating and have a non-metallic element moulded thereon.
  • the non- metallic component may be axially longer than the collar described and any component of any length may extend to a greater or lesser degree onto protected (painted) bar portions adjacent the moulding position.
  • the moulded components need not extend to cover any part of the protected surface at all, depending on the use to which the bar is to be put, that is, the axial length of the component may be less than or equal to, the length of the exposed moulding position.
  • the method may be used with different protective coatings (paints or otherwise) that do not of themselves require subjecting the bar to high temperature, provided, of course, each is immune to a suitable elevated temperature used in order to melt and remove the masking.
  • meltable mask material such as polyvinyl chloride that melts below any elevated temperature already employed by the painting process, but if desired the temperature could be elevated in general, or locally, specifically to dispose of masking of a different material, whatever, and in dependence upon the thermal behaviour of, the meltable mask material.
  • the mask material desirably forms a complete loop around the periphery of the bar to maximise the unpainted area available for the moulding bond but it is believed acceptable if the loop is incomplete, that is, giving a line of paint across the moulding position, provided that sufficient unpainted area remains in relation to loads that have to be borne by the moulded component.
  • the bar may be cleaned by methods other than, or in addition to shot peening, such as chemical degreasing.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

Un collier thermoplastique (27) (figure 4) est moulé sur une barre de stabilisation (20) au moins dans une position de moulage pour augmenter la résistance axiale. A cette fin, la barre est d'abord grenaillée pour la nettoyer, puis la barre est masquée à chaque emplacement de moulage avec une boucle constituée d'une bande adhésive fusible (22) (figure 2), et enfin de la poudre de peinture est projetée sur la barre et celle-ci est chauffée pour fondre la peinture en formant une couche (25) faisant corps avec la barre. le masque est ensuite enlevé et finalement le composant (27) est moulé sur la barre à chaque position dénudée de moulage. De préférence, le composant moulé est axialement plus long que la position dénudée de moulage et ses extrémités sont moulées sur la surface peinte.
EP93902377A 1992-01-16 1993-01-11 Procede pour mouler un composant non metallique sur une barre metallique Withdrawn EP0621807A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9200905 1992-01-16
GB929200905A GB9200905D0 (en) 1992-01-16 1992-01-16 Method of moulding a non-metallic component onto a metal bar
PCT/GB1993/000041 WO1993013876A1 (fr) 1992-01-16 1993-01-11 Procede pour mouler un composant non metallique sur une barre metallique

Publications (1)

Publication Number Publication Date
EP0621807A1 true EP0621807A1 (fr) 1994-11-02

Family

ID=10708703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93902377A Withdrawn EP0621807A1 (fr) 1992-01-16 1993-01-11 Procede pour mouler un composant non metallique sur une barre metallique

Country Status (3)

Country Link
EP (1) EP0621807A1 (fr)
GB (2) GB9200905D0 (fr)
WO (1) WO1993013876A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1285856B1 (it) * 1996-05-03 1998-06-24 Rejna Spa Dispositivo di posizionamento per barre stabilizzatrici, barra stabilizzatrice e sistema di stabilizzazione per veicoli utilizzanti
ES2228034T3 (es) * 1998-04-23 2005-04-01 Nhk Spring Co. Ltd. Dispositivo de retencion para un elemento de vastago.
US20050127633A1 (en) * 2003-12-12 2005-06-16 Fader Joseph A. Spray formed stabilizer bar lateral retainer
JP2009196505A (ja) 2008-02-21 2009-09-03 Nhk Spring Co Ltd 車両用スタビライザ
IT1395380B1 (it) 2009-09-07 2012-09-14 Piaggio & C Spa Dispositivo di fissaggio per accessori in un motociclo, in particolare per parabrezza
DE102012206453B4 (de) * 2012-04-19 2019-02-28 Zf Friedrichshafen Ag Elastomerlager zur Lagerung eines als Stabilisator ausgebildeten stabförmigen Lagerelements
JP6343153B2 (ja) * 2014-02-18 2018-06-13 日本発條株式会社 棒材と移動規制部材の半製品との取付構造
CN111873495A (zh) * 2020-07-30 2020-11-03 西南交通大学 一种连续纤维增强复合材料连接结构的制造方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3667988A (en) * 1969-07-09 1972-06-06 Nagoya Yukagaku Kogyo Kk Masking in surface treatment of articles
FR2641494B1 (fr) * 1989-01-12 1991-05-24 Allevard Ind Sa Procede de fabrication de structure caoutchouc-metal a forte sollicitation mecanique
GB8929056D0 (en) * 1989-12-22 1990-02-28 Tempered Spring Company The Li Anti-roll bars

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9313876A1 *

Also Published As

Publication number Publication date
GB9200905D0 (en) 1992-03-11
WO1993013876A1 (fr) 1993-07-22
GB9300370D0 (en) 1993-03-03
GB2263250A (en) 1993-07-21
GB2263250B (en) 1995-08-16

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