GB2087299A - Dual component element, made of moulded synthetic plastics materials - Google Patents

Dual component element, made of moulded synthetic plastics materials Download PDF

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Publication number
GB2087299A
GB2087299A GB8133822A GB8133822A GB2087299A GB 2087299 A GB2087299 A GB 2087299A GB 8133822 A GB8133822 A GB 8133822A GB 8133822 A GB8133822 A GB 8133822A GB 2087299 A GB2087299 A GB 2087299A
Authority
GB
United Kingdom
Prior art keywords
mould
plastics material
materials
motor vehicle
resistance
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Withdrawn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
GB8133822A
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.)
Cigala & Bertinetti Ind
Original Assignee
Cigala & Bertinetti Ind
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 Cigala & Bertinetti Ind filed Critical Cigala & Bertinetti Ind
Publication of GB2087299A publication Critical patent/GB2087299A/en
Withdrawn legal-status Critical Current

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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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/022—Mechanical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Combustion & Propulsion (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Architecture (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Body Structure For Vehicles (AREA)
  • Laminated Bodies (AREA)

Abstract

A synthetic plastics material element particularly suitable for motor vehicle bodies and bumpers is formed of two different materials. An outer part (6, 6a) of the element is made of a plastics material which has high resilience with good resistance to external agents and which is hot paintable. The inner part (7) of the element is made of a plastics material having a high resistance to mechanical deformation. The outer part may be formed with at least one externally protruding rib (6a). A modification of the element is shown in Figure 2, (not shown). <IMAGE>

Description

SPECIFICATION Dual component element, made of moulded synthetic plastics materials particularly for motor vehicle bodies and bumpers This invention relates to elements which are formed by moulding from synthetic plastics materials and mainly intended to be utilized as parts of moter vehicle bodies, and in particular as bumpers and other parts which are intended to withstand unusual mechanical stresses. The invention proposes that such an element, particularly when it is intended to be a bumper for a motor vehicle should be characterized by being formed of two materials having different particular properties which are introduced into the same mould by immediately successive injections.
More specifically, the plastics material which will form the outer part of the mould is injected first and the second plastics material which will form the inner part of the same element is injected in immediate succession.
The plastics materials which is injected first, and which will be quantitatively insufficient to fill the mould, is selected from those plastics materials which have a high resistance to external agents, a high resilience and are well suited to oven painting.
The plastics materials used in the second injection must possess instead a high mechanical resistance and act as a medium for filling the shell formed by the material used in the first injection.
A particular advantage of the present invention derives from the fact that, by using particular known injection systems, it is possible to mould objects of which the mechanical resistance is not uniform but different along their length or surface. This possibility can be widely exploited in the construction of motor vehicle bumpers as well as in the construction of external and inner parts of a motor vehicle body for which specific resistance features are required.
Typical elements according to the invention are hereafter described with reference to the accompanying illustrative drawing in which: Figure 1 is a perspective cross-sectional view of a fragment of a motor vehicle bumper; Figure 2 similar to Figure 1 illustrates a bumper having an alternative profile.
Referring now to both Figures of drawings there is shown a motor vehicle bumper 5 made of synthetic plastics materials and comprising an external part 6, 6a, and 6, 6b respectively and an inner part 7 and 7a respectively. The first external, part is made of a plastics material presenting a high resistance to external agents and suitable for oven painting.
The inner part 7, 7a, is by contrast, formed of a plastics material having a high mechanical resistance.
The material forming the part 6 is the first to be injected into the mould in a pre-determined quantity such as partially to fill the mould; immediately afterwards plastics material 7, 7a selected from materials having a suitable mechanical resistance is injected in a pre-established volume so that it presses the already injected material 6 against the inside of the mould.
There is thus produced an element 5 formed by two components of which the component 6 is outside and visible whether or not it is additionally coloured whilst the inner component 7, 7a constitutes a substitute for a metallic reinforcement.
The profile of the ribs 6a and 6b respectively, is determined by the shape of the mould which is selected according to the intended mode of use of the eventualiy produced element.
Bumpers for motor vehicles produced by the above described method are light in weight, cheap and very resistant to impacts due also to their remarkable elastic deformation capability within well known limits and depending upon the particular features of the two materials employed.
By employment of the same moulding process with two components, doors for motor vehicle bodies, mudguards, hoods, instrument panels and all parts which are not connected to mechanical kinematic members, may advantageously be produced.
1. An element of moulded synthetic plastics materials, which is formed of two different materials namely an outer material of a high resilience, good resistance to external agents and susceptible of hot oven painting, and an inner material being selected from plastics materials possessed of a high resist ante so mechanical deformation.
2. An element according to Claim 1, which has externally protruding reinforcing ribs defining channels which face the interior of the element and which are filled by the inner plastics material component.
3. A method of manufacturing an element in accordance with Claim 1 or Claim 2 which comprises injecting and partially filling a mould with a quantity of synthetic plastics material of high resilience, good resistance to external agents and susceptible of hot painting and immediately thereafter filling the mould with a plastics material having a high resist ante so mechanical deformation.
4. An element of moulded synthetic plastics material substantially as hereinbefore described with reference to, and as shown in, the accompanying drawing.
5. A method of manufacturing an element of moulded synthetic plastics material substantially as hereinbefore described.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Dual component element, made of moulded synthetic plastics materials particularly for motor vehicle bodies and bumpers This invention relates to elements which are formed by moulding from synthetic plastics materials and mainly intended to be utilized as parts of moter vehicle bodies, and in particular as bumpers and other parts which are intended to withstand unusual mechanical stresses. The invention proposes that such an element, particularly when it is intended to be a bumper for a motor vehicle should be characterized by being formed of two materials having different particular properties which are introduced into the same mould by immediately successive injections. More specifically, the plastics material which will form the outer part of the mould is injected first and the second plastics material which will form the inner part of the same element is injected in immediate succession. The plastics materials which is injected first, and which will be quantitatively insufficient to fill the mould, is selected from those plastics materials which have a high resistance to external agents, a high resilience and are well suited to oven painting. The plastics materials used in the second injection must possess instead a high mechanical resistance and act as a medium for filling the shell formed by the material used in the first injection. A particular advantage of the present invention derives from the fact that, by using particular known injection systems, it is possible to mould objects of which the mechanical resistance is not uniform but different along their length or surface. This possibility can be widely exploited in the construction of motor vehicle bumpers as well as in the construction of external and inner parts of a motor vehicle body for which specific resistance features are required. Typical elements according to the invention are hereafter described with reference to the accompanying illustrative drawing in which: Figure 1 is a perspective cross-sectional view of a fragment of a motor vehicle bumper; Figure 2 similar to Figure 1 illustrates a bumper having an alternative profile. Referring now to both Figures of drawings there is shown a motor vehicle bumper 5 made of synthetic plastics materials and comprising an external part 6, 6a, and 6, 6b respectively and an inner part 7 and 7a respectively. The first external, part is made of a plastics material presenting a high resistance to external agents and suitable for oven painting. The inner part 7, 7a, is by contrast, formed of a plastics material having a high mechanical resistance. The material forming the part 6 is the first to be injected into the mould in a pre-determined quantity such as partially to fill the mould; immediately afterwards plastics material 7, 7a selected from materials having a suitable mechanical resistance is injected in a pre-established volume so that it presses the already injected material 6 against the inside of the mould. There is thus produced an element 5 formed by two components of which the component 6 is outside and visible whether or not it is additionally coloured whilst the inner component 7, 7a constitutes a substitute for a metallic reinforcement. The profile of the ribs 6a and 6b respectively, is determined by the shape of the mould which is selected according to the intended mode of use of the eventualiy produced element. Bumpers for motor vehicles produced by the above described method are light in weight, cheap and very resistant to impacts due also to their remarkable elastic deformation capability within well known limits and depending upon the particular features of the two materials employed. By employment of the same moulding process with two components, doors for motor vehicle bodies, mudguards, hoods, instrument panels and all parts which are not connected to mechanical kinematic members, may advantageously be produced. CLAIMS
1. An element of moulded synthetic plastics materials, which is formed of two different materials namely an outer material of a high resilience, good resistance to external agents and susceptible of hot oven painting, and an inner material being selected from plastics materials possessed of a high resist ante so mechanical deformation.
2. An element according to Claim 1, which has externally protruding reinforcing ribs defining channels which face the interior of the element and which are filled by the inner plastics material component.
3. A method of manufacturing an element in accordance with Claim 1 or Claim 2 which comprises injecting and partially filling a mould with a quantity of synthetic plastics material of high resilience, good resistance to external agents and susceptible of hot painting and immediately thereafter filling the mould with a plastics material having a high resist ante so mechanical deformation.
4. An element of moulded synthetic plastics material substantially as hereinbefore described with reference to, and as shown in, the accompanying drawing.
5. A method of manufacturing an element of moulded synthetic plastics material substantially as hereinbefore described.
GB8133822A 1980-11-14 1981-11-10 Dual component element, made of moulded synthetic plastics materials Withdrawn GB2087299A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8053671U IT8053671V0 (en) 1980-11-14 1980-11-14 PRINTED ELEMENT IN PLASTIC MATERIAL WITH TWO COMPONENTS PARTICULARLY BUMPER FOR VEHICLES

Publications (1)

Publication Number Publication Date
GB2087299A true GB2087299A (en) 1982-05-26

Family

ID=11284489

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8133822A Withdrawn GB2087299A (en) 1980-11-14 1981-11-10 Dual component element, made of moulded synthetic plastics materials

Country Status (10)

Country Link
JP (1) JPS57134127U (en)
BE (1) BE891139A (en)
BR (1) BR6101638U (en)
DE (1) DE8132003U1 (en)
ES (1) ES261367Y (en)
FR (1) FR2494185A3 (en)
GB (1) GB2087299A (en)
IT (1) IT8053671V0 (en)
NL (1) NL8104984A (en)
SE (1) SE8106484L (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4212704A1 (en) * 1992-04-16 1993-10-21 Daimler Benz Ag Gas-filled hollow plastic injection mouldings for cars - have hollow interiors in relevant parts filled with sound or heat insulation to promote passenger comfort
US5562979A (en) * 1992-03-05 1996-10-08 Rover Group Limited Method of forming a moulding by dual injection and a moulding so formed
US5658041A (en) * 1994-04-25 1997-08-19 Compagnie Plastic Omnium Overmolded plastic-metal motor vehicle front body panel
EP0958969A1 (en) * 1998-05-16 1999-11-24 Concept Mouldings Limited Vehicle protection bars
US6030567A (en) * 1995-11-02 2000-02-29 Honda Giken Kogyo Kabushiki Kaisha Process for producing sandwich-shaped synthetic resin-molded article
US6060004A (en) * 1995-11-09 2000-05-09 Honda Giken Kogyo Kabushiki Kaisha Process for producing bumper made of synthetic resin for automobile vehicle
US6068807A (en) * 1995-11-02 2000-05-30 Honda Giken Kogyo Kabushiki Kaisha Process for producing a bumper for a vehicle
US6180042B1 (en) * 1995-11-08 2001-01-30 Honda Giken Kogyo Kabushiki Kaisha Process for producing molded article made of synthetic resin
EP1263574A1 (en) * 2000-02-24 2002-12-11 Conix Corporation Integrated co-injection molded vehicle components and methods of making the same
US6843954B2 (en) 2000-02-24 2005-01-18 Conix Corporation Injection molding techniques utilizing fluid channels
US6998174B2 (en) 2000-02-24 2006-02-14 Conix Corporation Integrated co-injection molded vehicle components and methods of making the same
US20130257068A1 (en) * 2010-12-15 2013-10-03 Isamu Nakazawa Under-run protector for vehicle
US9539937B2 (en) 2013-11-21 2017-01-10 Ford Global Technologies, Llc Vehicle step lamp

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2150849B1 (en) * 1998-04-24 2001-06-01 Fundacio Ascamm Ct Tecnologic "BUMPER FOR MOTOR VEHICLES".

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5562979A (en) * 1992-03-05 1996-10-08 Rover Group Limited Method of forming a moulding by dual injection and a moulding so formed
DE4212704A1 (en) * 1992-04-16 1993-10-21 Daimler Benz Ag Gas-filled hollow plastic injection mouldings for cars - have hollow interiors in relevant parts filled with sound or heat insulation to promote passenger comfort
US5658041A (en) * 1994-04-25 1997-08-19 Compagnie Plastic Omnium Overmolded plastic-metal motor vehicle front body panel
CN1067637C (en) * 1995-11-02 2001-06-27 本田技研工业株式会社 Process for producing dumper for vehicle
US6030567A (en) * 1995-11-02 2000-02-29 Honda Giken Kogyo Kabushiki Kaisha Process for producing sandwich-shaped synthetic resin-molded article
US6068807A (en) * 1995-11-02 2000-05-30 Honda Giken Kogyo Kabushiki Kaisha Process for producing a bumper for a vehicle
US6180042B1 (en) * 1995-11-08 2001-01-30 Honda Giken Kogyo Kabushiki Kaisha Process for producing molded article made of synthetic resin
US6060004A (en) * 1995-11-09 2000-05-09 Honda Giken Kogyo Kabushiki Kaisha Process for producing bumper made of synthetic resin for automobile vehicle
EP0958969A1 (en) * 1998-05-16 1999-11-24 Concept Mouldings Limited Vehicle protection bars
EP1265742A1 (en) * 2000-02-24 2002-12-18 Conix Corporation Low-density injection-molded body components
EP1263574A1 (en) * 2000-02-24 2002-12-11 Conix Corporation Integrated co-injection molded vehicle components and methods of making the same
EP1263574A4 (en) * 2000-02-24 2003-05-02 Conix Corp Integrated co-injection molded vehicle components and methods of making the same
EP1265742A4 (en) * 2000-02-24 2003-05-07 Conix Corp Low-density injection-molded body components
US6843954B2 (en) 2000-02-24 2005-01-18 Conix Corporation Injection molding techniques utilizing fluid channels
US6998174B2 (en) 2000-02-24 2006-02-14 Conix Corporation Integrated co-injection molded vehicle components and methods of making the same
US7632445B2 (en) * 2000-02-24 2009-12-15 Conix Corporation Integrated co-injection molded vehicle components and methods of making the same
US20130257068A1 (en) * 2010-12-15 2013-10-03 Isamu Nakazawa Under-run protector for vehicle
US9539937B2 (en) 2013-11-21 2017-01-10 Ford Global Technologies, Llc Vehicle step lamp

Also Published As

Publication number Publication date
ES261367U (en) 1984-05-16
IT8053671V0 (en) 1980-11-14
NL8104984A (en) 1982-06-01
JPS57134127U (en) 1982-08-21
DE8132003U1 (en) 1982-04-01
SE8106484L (en) 1982-05-15
FR2494185B3 (en) 1982-11-26
BE891139A (en) 1982-03-16
ES261367Y (en) 1984-12-16
BR6101638U (en) 1982-07-20
FR2494185A3 (en) 1982-05-21

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)