WO1988009732A1 - Pare-choc moule par soufflage et procede pour sa fabrication - Google Patents

Pare-choc moule par soufflage et procede pour sa fabrication Download PDF

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Publication number
WO1988009732A1
WO1988009732A1 PCT/SE1988/000293 SE8800293W WO8809732A1 WO 1988009732 A1 WO1988009732 A1 WO 1988009732A1 SE 8800293 W SE8800293 W SE 8800293W WO 8809732 A1 WO8809732 A1 WO 8809732A1
Authority
WO
WIPO (PCT)
Prior art keywords
bumper
supporting element
mould
blow
cavity
Prior art date
Application number
PCT/SE1988/000293
Other languages
English (en)
Inventor
Mikael Quasters
Original Assignee
Plm Ab
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 Plm Ab filed Critical Plm Ab
Publication of WO1988009732A1 publication Critical patent/WO1988009732A1/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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/24—Lining or labelling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/03—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by material, e.g. composite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/24—Lining or labelling
    • B29C2049/2412—Lining or labelling outside the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04—Extrusion blow-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
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3044—Bumpers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/186—Additional energy absorbing means supported on bumber beams, e.g. cellular structures or material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/186—Additional energy absorbing means supported on bumber beams, e.g. cellular structures or material
    • B60R2019/188—Blow molded structures

Definitions

  • the present invention relates to a bumper for vehicles and a method for manufacturing the same in accordance with the preambles to claims 1 and claim 8, respectively.
  • the present invention relates to a bumper and a method for manu ⁇ facturing the same where the above-mentioned disadvantages are avoided. It is a particularly valuable feature of the present invention that it makes possible a rational manufacture of the bumper and, if the case arises, of its connected elements such as end flukes, rear inspection screen and spoiler.
  • the costs of the manufacture of the bumper as well as of the assembly of the same, and also of elements connected to the bumper are reduced, at the same time as the dimensional accuracy and the fit between the units and the connection of the units to the body are improved.
  • the novelty of the bumper in accordance with the invention and the new method for producing the bumper are indicated in the charac- terizing part of claim 1 and in the characterizing part of claim 11, respectively.
  • the blow-moulded body of plastic material comprises a substantially downwards directed part, arranged in longitudinal direction of the bumper and assembled with the bumper on a vehicle, which forms a spoiler or a rear inspection screen.
  • the downwards directed part is substantially hollow and forms one or more cavities.
  • blow-moulded body forms in both the end regions of the bumper portions which are oriented at an angle to the longitudinal axis of the bumper. These portions are designed as side protection (end flukes).
  • opposite walls of the bumper are joined to one another in a region where the downwards directed part connects to the remainder of the bumper.
  • the downwards directed part forms a separate cavity which independently of the cavity of the bumper can be filled with a flexible material, e.g. foamed plastic material, should this be desired.
  • connection region so that the downwards directed part can have a certain mobility therein, as a result of which damaging effects on the downwards directed part in conjunction with minor collisions with hard sr?.ow or ice banks, animals etc. may be reduced.
  • a dimensionally stable supporting element is placed in the blow mould prior to the expanding of the material.
  • This supporting element forms in the cavity of the blow mould a boundary surface which constitutes part of the walls of the blow mould.
  • the supporting element moreover, in certain embodiments, is provided with mechanical elements which have the effect that on expansion of the parison the hollow body is fixed to the supporting element.
  • the supporting element is coated with an adhesive which, as the parison is expanded against the wall of the blow mould, forms a connecting element in the form of a glue line between the hollow body and the supporting element.
  • Fig. 1a. lb show sections through alternative embodiments of a blow mould with a parison placed in the blow mould
  • Fig. 2a, 2b show sections corresponding to Fig. 1a, lb after expansion of the parison
  • Fig. 3 shows a section through a bumper with spoiler in accordance with a first embodiment
  • Fig. 4 shows a section through a bumper with spoiler in a second embodiment
  • Fig. 5 shows the bumper seen from the top
  • Fig. 6 is a front view of the bumper
  • Fig. 7 is a side view of the bumper.
  • FIG. la lb and 2a, 2b embodiments of a blow mould 40 are shown consisting of two mould parts 43, 44 which by driving means (not shown in the figures) are movable to and from a working position wherein the mould parts form a substantially closed cavity 42 composed of two partial cavities 41a and 41b, respectively which are separated by a transition region 48 wherein the mould surfaces 42 of the mould cavity 41 are located closely adjoining one another.
  • the transition region forms a connection between the two partial cavi ⁇ ties.
  • One mould part 43 in the embodiments shown is provided with means for the insertion of a supporting element 20a, 20b which is to be incorporated in the product to be manufactured in the blow mould.
  • the supporting element is shown with refe- rence to particular embodiments, the mould part 43 may be arranged so in other embodiments, of course, that it can accept supporting elements of different designs. It is evident from the Figures that the supporting element forms a portion of the mould surfce 42 of the cavity 41. In the embodiment shown in the Figures, la, 2a the supporting element 20a forms one of the opposing mould surfaces 42 in the transition region 48.
  • the supporting element as a rule is constituted of aluminium, but supporting elements of plastic mate ⁇ rial, preferably reinforced plastic material, are used in certain appliations. Ducts 49a, 49b for heat transfer medium are provided in the two mould parts 43, 44. In Fig.
  • Fig. 1a the distance between the opposing mould surface 42 in the transition region 48 is sufficiently great for the inner boundary surfaces of the tubular parison to be separated in the transition region of the mould
  • Fig. 1b shows an embodiment where on movement of the mould parts to their working position the inner boundary surfaces of the parison are made to lie against one another in the transition region of the mould.
  • the region of the parison which corresponds to the transition region of the mould is designated connecting region and has the reference numerals 15a and 15b, respectively.
  • an adhesive 25 such as a glue
  • Fig. 2a, 2b are shown alternative embodiments of a hollow body 10a and 10b, respectively, which is formed after the tubular parison 50 by means of blow moulding has been expanded against the surface 42 of the blow mould.
  • the hollow body 10 forms a closed cavity composed of a first cavity 11 and a second cavity 13, the second cavity being situated in a part 12 which in the Figure is directed substantially downwards.
  • Reference numerals 14a, 14b indicate substantially opposing walls of the hollow body 10.
  • a connecting region 17a, 17b exists between the two cavities which corresponds to the connecting region 15a, 15b of the parison and which on moulding of the bumper is formed in the area of the transition region 48 of the blowing mould.
  • the hollow body 10 together with the supporting element 20a, 20b forms the bumper 1.
  • the cavities 11 and 13, respectively, are divided into several partial cavities or compartments.
  • the hollow body 10 of plastic material is shown in embodiments corresponding to those in Fig. 2a, 2b, that is to say comprising the part 12 directed downwards in the Figures which forms a spoiler, alternatively forms a so-called inspection screen when it is included in a rear bumper.
  • the upper cavity of the hollow body as a rule is filled with a flexible, resilient and energy-absorb ng material 30, e.g. foamed plastic material, preferably polyurethane foam.
  • the lower cavity too is provided with a filling of foamed plastic material 31.
  • the two cavities 11 and 13, respectively, are del mited from one another (se also Fig. 2a and 2b) owing to the opposing walls 14a, 14b in the connecting region 17a, 17b being situated closely adjoining one another, as is shown in Fig. 3, or joined to one another, as is shown in Fig. 4.
  • the hollow body 10 is joined to the largely dimensionally stable supporting element 20a, 20b.
  • the supporting element is provided with connecting means 21, 22 for the attachment of the supporting element, and thus the bumper, to a vehicle.
  • the connecting means 21 consist e, g, of brackets which are fastened with screws to the vehicle whilst in other applications the connecting means 22 consist of undercuts which co-operate with arrangements corresponding thereto on the vehicle.
  • the embodiment of the connecting means 22 shown in Fig. 4 implies also that it will constitute a projecting means 23 which is matched on the hollow body 10 by an undercut 16.
  • the projecting means 23 and the undercut 16 co-operate so as to fix the hollow body to the largely di ensionally stable supporting element 20b.
  • this connection is replaced by a glue line 24, such as shown in Fig. 3, whilst in other embodiments the glue line constitutes a complement to the aforementioned attachment betv/een the projecting means and the undercut 16.
  • Fig. 5-7 show in addition to v/hat is evident already from the earlier Figures, that the bumper in certain embodiments terminates at both ends 18a, 18b in portions 19a, 19b which form angles to the longi ⁇ tudinal direction of the bumper.
  • the side protections form cavitites which are connected to the upper cavity 11 shown in the Figures, whilst in other embodiments the cavities of the side protections are separated from the upper cavity of the bumper.
  • the cavities in the side protec ⁇ tions too are filled with foamed plastics, In these embodiments the upper cavity 11 of the bumper and the cavities of the side protection as a rule form a coherent cavity.
  • a tube is extruded and is enclosed ⁇ by the blow mould.
  • a slightly elevated internal pressure is imparted to the tube which makes it posssible that on closure of the mould by means of the surfaces 42 of the mould, and especially by using the mould surfaces in the transition region 48, the material in the tube is distributed as shown in principle in Fig, 1a or b, that is to say so that the two partial cavities 41a, 41b are provided with sufficient material so that the wall thickness of the hollow body, which is formed in the subsequent blowing, gives the necessary mechanical stability to the same.
  • the dimensionally stable supporting element 20a, 20b is inserted as a rule into the blow mould and forms part of the boundary walls of the blow mould, whilst in other embodiments the blow mould is provided with mould walls whose configuration corresponds to the final form of the hollow body 10.
  • the moulding of the hollow body 10 is started in that, as the mould parts are moved to the working position, the walls of the tubular parison are pressed towards one another by the mould surfaces 42 in the transition region 48 of the mould, and since they still are at high temperature, they will then as a rule be fixed to one another in a region corresponding to the connecting region 15a, 15b of the parison and thereby form the connecting region 17a, 17b of the hollow body 10.
  • the tip of an injection needle is introduced through the material wall and a plastic material, suitable for foaming, is injected by means of the injection needle into the hollow body 10.
  • a plastic material suitable for foaming
  • the interior of the hollow body is still at a sufficiently high temperature for the desired foaming to take place.
  • the injection needle is introduced into the hole which is formed when the blow mandrel is withdrawn from the material wall.
  • the walls are joined to one another, it will be as a rule only the cavity 11 which is filled with foamed plastic material 31.
  • the distance between the opposing walls in the connecting region 17 is made a little larger, or alternatively a further injection needle is provided which penetrates the wall 14 of the hollow body 10 in the region of the lower part 12 in order to introduce foamed plastic material into its cavity 13.
  • the dimensionally stable supporting element is coated with an adhesive 25 against which the plastic material of the parison is expanded.
  • the expanded plastic material is still relatively warm when it makes contact with the adhesive and is pressed against the same owing to the pressure inside the parison.
  • an extremely strong joint 24 glue line

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

Un pare-choc (1) comprend un corps (10) qui est relié à un élément de support (20a) dirigé dans le sens longitudinal du pare-choc. L'élément du support (20a) est pourvu d'un ou de plusieurs organes de liaison (21) permettant la fixation du pare-choc à un véhicule. Le corps (10) est constitué par un corps moulé par soufflage en matériau thermoplastique, qui s'étend le long du pare-choc d'une extrémité à l'autre. Le corps moulé par soufflage contient une cavité (11) dont la paroi limite (14a) est relié par un organe de fixation (24) à l'élément de support (20a) pour permettre la fixation du corps (10) à l'élément. Dans un procédé de fabrication d'un tel pare-choc, l'élément de support (20a) est introduit dans un moule pour soufflage (40) destiné à former une partie des surfaces du moule pour soufflage. Une préforme tubulaire en matériau thermoplastique est expansée contre les surfaces du moule, le corps ainsi formé se fixe à l'élément de support au moyen d'un élément de fixation et/ou d'un adhésif disposé sur l'élément de support.
PCT/SE1988/000293 1987-06-05 1988-06-02 Pare-choc moule par soufflage et procede pour sa fabrication WO1988009732A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8702342A SE8702342L (sv) 1987-06-05 1987-06-05 Formblaast produkt
SE8702342-0 1987-06-05

Publications (1)

Publication Number Publication Date
WO1988009732A1 true WO1988009732A1 (fr) 1988-12-15

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ID=20368761

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Application Number Title Priority Date Filing Date
PCT/SE1988/000293 WO1988009732A1 (fr) 1987-06-05 1988-06-02 Pare-choc moule par soufflage et procede pour sa fabrication

Country Status (2)

Country Link
SE (1) SE8702342L (fr)
WO (1) WO1988009732A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU626489B2 (en) * 1990-01-24 1992-07-30 Urethane Manufacturers Of Australia Pty Limited Removeable bumpers for underground mining vehicle
GB2272190A (en) * 1992-11-07 1994-05-11 Daimler Benz Ag A bumper of a motor vehicle.
DE4330397A1 (de) * 1993-09-08 1995-03-09 Porsche Ag Stoßfänger für Fahrzeuge, insbesondere Kraftfahrzeuge

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2526914A1 (de) * 1974-12-05 1976-06-10 Stars Spa Stossdaempfer fuer kraftfahrzeuge
FR2366960A1 (fr) * 1976-10-06 1978-05-05 Stars Spa Pare-chocs en materiel polymere pour vehicules automobiles
EP0073478A2 (fr) * 1981-09-02 1983-03-09 BASF Aktiengesellschaft Elément de construction stable à la flexion, en particulier pare-chocs pour véhicules
DE3209464A1 (de) * 1982-03-16 1983-09-29 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Energieabsorbierendes bauteil wie stossfaenger, kniefaenger oder dergleichen fuer kraftfahrzeuge
FR2530207A1 (fr) * 1982-07-16 1984-01-20 Techni Plaste Sa Pare-choc de vehicule automobile et son element de montage sur le chassis du vehicule
DE3342332A1 (de) * 1982-11-29 1984-06-14 Safiplast S.p.A., Milano Kraftfahrzeugstossstange mit innerem verstaerkungskoerper
DE3328978A1 (de) * 1983-08-11 1985-02-28 Rehau Plastiks Ag + Co, 8673 Rehau Stossfaenger aus kunststoff

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2526914A1 (de) * 1974-12-05 1976-06-10 Stars Spa Stossdaempfer fuer kraftfahrzeuge
FR2366960A1 (fr) * 1976-10-06 1978-05-05 Stars Spa Pare-chocs en materiel polymere pour vehicules automobiles
EP0073478A2 (fr) * 1981-09-02 1983-03-09 BASF Aktiengesellschaft Elément de construction stable à la flexion, en particulier pare-chocs pour véhicules
DE3209464A1 (de) * 1982-03-16 1983-09-29 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Energieabsorbierendes bauteil wie stossfaenger, kniefaenger oder dergleichen fuer kraftfahrzeuge
FR2530207A1 (fr) * 1982-07-16 1984-01-20 Techni Plaste Sa Pare-choc de vehicule automobile et son element de montage sur le chassis du vehicule
DE3342332A1 (de) * 1982-11-29 1984-06-14 Safiplast S.p.A., Milano Kraftfahrzeugstossstange mit innerem verstaerkungskoerper
DE3328978A1 (de) * 1983-08-11 1985-02-28 Rehau Plastiks Ag + Co, 8673 Rehau Stossfaenger aus kunststoff

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU626489B2 (en) * 1990-01-24 1992-07-30 Urethane Manufacturers Of Australia Pty Limited Removeable bumpers for underground mining vehicle
GB2272190A (en) * 1992-11-07 1994-05-11 Daimler Benz Ag A bumper of a motor vehicle.
US5393111A (en) * 1992-11-07 1995-02-28 Mercedes-Benz Ag Bumper assembly for a motor vehicle
GB2272190B (en) * 1992-11-07 1996-02-14 Daimler Benz Ag A bumper of a motor vehicle
DE4330397A1 (de) * 1993-09-08 1995-03-09 Porsche Ag Stoßfänger für Fahrzeuge, insbesondere Kraftfahrzeuge
GB2281720A (en) * 1993-09-08 1995-03-15 Porsche Ag Two part vehicle bumper with upper and lower internal brackets
GB2281720B (en) * 1993-09-08 1996-06-12 Porsche Ag Vehicle bumper

Also Published As

Publication number Publication date
SE8702342L (sv) 1988-12-06
SE8702342D0 (sv) 1987-06-05

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