EP0697975A1 - Use of thermoplastic sandwich material for the production of vehicle bodies - Google Patents
Use of thermoplastic sandwich material for the production of vehicle bodiesInfo
- Publication number
- EP0697975A1 EP0697975A1 EP94915712A EP94915712A EP0697975A1 EP 0697975 A1 EP0697975 A1 EP 0697975A1 EP 94915712 A EP94915712 A EP 94915712A EP 94915712 A EP94915712 A EP 94915712A EP 0697975 A1 EP0697975 A1 EP 0697975A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thermoplastic
- materials
- production
- layers
- cabins
- 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- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
- B62D25/14—Dashboards as superstructure sub-units
-
- 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
- B62D29/043—Superstructures
Definitions
- This invention concerns the use of laminates in thermoplastic material for the manufacture of car bodies/cabins, or large uniform body parts for vehicles.
- the vehicle industry is also facing major chal- lenges with regard to future requirements for recycling of materials.
- the first requirement is that recyclable materials should be used to begin with and secondly that the product, parts or components should be designed in such a manner that they can be easily dismantled, returned to raw material and thereafter employed in an appropriate manner to form a new product. It is also important for this recycling process to have an acceptable economic profile.
- thermoplastics for the production of bodies and cabins, or large uniform parts of such.
- thermoplastic materials for the manufacture of bodies/cabins or large parts for vehicles will provide major advantages such as the fact that the product will be lighter than present constructions where substantial frameworks with welded panels generally also have to be built in order to fabricate a car body or body parts.
- thermoplastics By using a laminate construction of thermoplastics, properties will be obtained which have many advantages over the traditional construction materials and methods employed to-day.
- a layered construction of a body part provides possibilities for selecting the most suitable quality for the individual layers.
- recyclable material can also be used in a rational manner, the outer layer, for example, being made of a pure/new material, while an inner layer is constructed of recycled material in which the requirements for purity, colour, etc. are of no importance and thus an additional second layer can be provided on the inside in different colours /qualities. It can be of great importance to give a body/cabin different colour shades* by introducing colour pigments in the thermoplastic material, the layers on the outside and the inside of the body respectively thus obtaining the colour combination(s) desired.
- the application is a new and unconventional method of using thermoplastic material, and the application permits the use of modern materials in an efficient, rational and environmentally friendly manner.
- Bodies/cabins fabricated in one piece as described will be very strong due to the edged and angular three dimensional design. This gives the products the necess ⁇ ary rigidity and strength.
- Laminates of thermoplastic materials can also be developed by adding to a minimum of one layer of the thermoplastic material a blowing means which causes one layer to be foamed.
- a blowing means which causes one layer to be foamed.
- an example of such a laminate could be one with a fixed homogeneous layer on the outside of the body part, a foamed central layer as a core and a second homogeneous layer on the inside, possibly in a different requested colour. In this way a uniform construction is obtained which provides satisfactory rigidity and strength in addition to giving the body good heat and sound insulation.
- thermoplastics will be used which are compatible with one another in such a manner that the layers are attached to one another without the addition of adhesive/bonding agents.
- thermoplastic laminate will be manufactured by means of known per se production methods such as, for example, rotational moulding.
- the application is considered to be extremely unconventional in relation to those production methods in use to-day for building car bodies and cabins.
- the application meets all the requirements for environmentally friendly production and efficient and rational utilization of resource materials. Recycling is therefore an object and a reapplication of such material is achieved by means of the above-mentioned methods.
- the application also makes it possible to use traditional types of thermoplastic which have a wide range of applications an which are favourable with regard to price.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
This case concerns the use of laminates consisting of thermoplastic materials in the manufacture of car bodies/cabins and larger parts of such for vehicles. It is presumed that the application will be performed in one operation, preferably by means of rotational moulding. It is presumed that the materials in the different layers are bound to one another without the use of added adhesives/bonding agents. The application further consists of preferably varying qualities/colours in the different layers of the thermoplastic laminate.
Description
Use of Thermoplastic Sandwich Material for the Production of Vehicle Bodies
This invention concerns the use of laminates in thermoplastic material for the manufacture of car bodies/cabins, or large uniform body parts for vehicles.
For a long time work has been in progress on the wider use of plastics materials in the manufacture of vehicles and cars, with a view to reducing weight, reduc¬ ing corrosion problems and cutting costs. In recent years in particular intense efforts have been made in this field with regard to weight saving with the object of reducing energy consumption and thereby also reducing pollution. In most cases the plastics materials have completely different properties to steel which is used to a considerable extent, with considerations of strength, elasticity, temperature conditions, point loads, etc. in mind.
As in most branches of industry the vehicle industry is also facing major chal- lenges with regard to future requirements for recycling of materials. In order to be able to implement an effective recycling of materials, the first requirement is that recyclable materials should be used to begin with and secondly that the product, parts or components should be designed in such a manner that they can be easily dismantled, returned to raw material and thereafter employed in an appropriate manner to form a new product. It is also important for this recycling process to have an acceptable economic profile.
Another problem involved in the use of metallic constructions for body and cabin building is the substantial finishing process required for corrosion protection and surface treatment of the product. This is an elaborate and expensive process which in many cases also entails considerable environmental stresses.
The present application for a functional patent redresses some of the above- mentioned problems and provides a practical and economic application of thermoplastics for the production of bodies and cabins, or large uniform parts of such.
The use of laminated thermoplastic materials for the manufacture of bodies/cabins or large parts for vehicles will provide major advantages such as the fact that the product will be lighter than present constructions where
substantial frameworks with welded panels generally also have to be built in order to fabricate a car body or body parts.
By using a laminate construction of thermoplastics, properties will be obtained which have many advantages over the traditional construction materials and methods employed to-day.
A layered construction of a body part provides possibilities for selecting the most suitable quality for the individual layers. In this way recyclable material can also be used in a rational manner, the outer layer, for example, being made of a pure/new material, while an inner layer is constructed of recycled material in which the requirements for purity, colour, etc. are of no importance and thus an additional second layer can be provided on the inside in different colours /qualities. It can be of great importance to give a body/cabin different colour shades* by introducing colour pigments in the thermoplastic material, the layers on the outside and the inside of the body respectively thus obtaining the colour combination(s) desired.
This eliminates the traditional outer treatment of a car body consisting of cor¬ rosion protection, polishing, spraying, etc. This will have considerable advan¬ tages from the environmental point of view, since the use of spraying paint and volatile substances is avoided. As mentioned above, the present application provides a very well suited and rational method of utilizing recyclable material, including both ends and remains of new bodies which are moulded, or bodies of discarded vehicles. The problem with the use of regranulated material of this kind is often that it is difficult to combine with a finish, colour and surface which is required by a purchaser.
By utilizing this material encapsulated in a laminate, this problem is avoided. The application is a new and unconventional method of using thermoplastic material, and the application permits the use of modern materials in an efficient, rational and environmentally friendly manner.
Bodies/cabins fabricated in one piece as described will be very strong due to the edged and angular three dimensional design. This gives the products the necess¬ ary rigidity and strength. Laminates of thermoplastic materials can also be developed by adding to a minimum of one layer of the thermoplastic material a blowing means which causes one layer to be foamed. Thus an example of such a
laminate could be one with a fixed homogeneous layer on the outside of the body part, a foamed central layer as a core and a second homogeneous layer on the inside, possibly in a different requested colour. In this way a uniform construction is obtained which provides satisfactory rigidity and strength in addition to giving the body good heat and sound insulation.
In this application thermoplastics will be used which are compatible with one another in such a manner that the layers are attached to one another without the addition of adhesive/bonding agents.
It is presumed that the thermoplastic laminate will be manufactured by means of known per se production methods such as, for example, rotational moulding.
The application is considered to be extremely unconventional in relation to those production methods in use to-day for building car bodies and cabins. The application meets all the requirements for environmentally friendly production and efficient and rational utilization of resource materials. Recycling is therefore an object and a reapplication of such material is achieved by means of the above-mentioned methods. The application also makes it possible to use traditional types of thermoplastic which have a wide range of applications an which are favourable with regard to price.
Claims
1. The use of a laminated plastics material, wherein the various layers are thermoplastics which are attached to one another during the moulding process without the use of bonding agents and preferably with at least one foamed thermoplastic layer, for the manufacture of large vehicle body parts or cabins in one piece.
2. The use according to claim 1 wherein one or more of the layers are manufactured by the use of recycled material.
3. The use according to the above claims wherein the layers in the laminate consist of materials with different colour pigments.
4. The use according to the above claims wherein linear low density polyethylene (LLDPE) is employed as a thermoplastic.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO931686 | 1993-05-07 | ||
| NO931686A NO301268B1 (en) | 1993-05-07 | 1993-05-07 | Reinforced front section for use in the production of booths / bodies for vehicles |
| NO931734 | 1993-05-13 | ||
| NO931734A NO931734L (en) | 1993-05-07 | 1993-05-13 | Use of thermoplastic laminates for the manufacture of bodies and cabins |
| PCT/NO1994/000089 WO1994026576A1 (en) | 1993-05-07 | 1994-05-09 | Use of thermoplastic sandwich material for the production of vehicle bodies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0697975A1 true EP0697975A1 (en) | 1996-02-28 |
Family
ID=26648403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94915712A Withdrawn EP0697975A1 (en) | 1993-05-07 | 1994-05-09 | Use of thermoplastic sandwich material for the production of vehicle bodies |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0697975A1 (en) |
| JP (1) | JPH08509929A (en) |
| AU (1) | AU6762394A (en) |
| GB (1) | GB2283214B (en) |
| NO (1) | NO931734L (en) |
| WO (1) | WO1994026576A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2749264B1 (en) * | 1996-05-28 | 1998-08-07 | Automaxi Ind Sa | VEHICLE WITH MOLDED SELF-SUPPORTING SHELL AND METHOD FOR MANUFACTURING SUCH A SELF-SUPPORTING SHELL |
| GB2322339B (en) * | 1997-02-22 | 2001-04-25 | Lansing Linde Ltd | Tractor |
| FR2760702B1 (en) * | 1997-03-14 | 1999-05-28 | Redcost | EVOLVING CELL FOR VEHICLE |
| JPH11200414A (en) | 1998-01-14 | 1999-07-27 | Yutani Heavy Ind Ltd | Exterior trim material for construction machine and manufacture thereof |
| NL2005845C2 (en) | 2010-12-09 | 2012-06-12 | Kooiker Bedrijfswagenspuiterij En Carrosserie B V | Structural material and method of manufacturing thereof. |
| KR101720207B1 (en) * | 2015-10-22 | 2017-03-27 | 유한회사 가야미 | Tractor for loop using a foaming rotational molding and method for manufacturing the same |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1059556A (en) * | 1964-09-22 | 1967-02-22 | Ici Ltd | Motor car bodies |
| US3455596A (en) * | 1966-11-28 | 1969-07-15 | Klaus E B Krutzikowsky | Trailer body and method of making same |
| GB1274643A (en) * | 1968-07-04 | 1972-05-17 | Diva Cars Ltd | Improvements relating to motor land vehicles |
| US4093173A (en) * | 1974-12-23 | 1978-06-06 | Tadahisa Kawamata | Mold for manufacture of bodies for transporting units |
| GB1591303A (en) * | 1976-09-17 | 1981-06-17 | M & G Tankers Ltd | Tank structures for carriage of liquids |
| CA1210793A (en) * | 1982-08-24 | 1986-09-02 | Roger J. Martin | Truck bodies |
| IT1218653B (en) * | 1987-04-08 | 1990-04-19 | Ferrari Spa Esercizio Fabbrich | COMPOSITE STRUCTURAL SUPPORTING ELEMENT FOR VEHICLE BODIES AND PROCEDURE FOR ITS MANUFACTURE |
| NO167642C (en) * | 1989-08-04 | 1991-11-27 | Ringdal Patenter As | DEVICE FOR CABINS FOR SMALL, EASY VEHICLES. |
-
1993
- 1993-05-13 NO NO931734A patent/NO931734L/en unknown
-
1994
- 1994-05-09 WO PCT/NO1994/000089 patent/WO1994026576A1/en not_active Application Discontinuation
- 1994-05-09 GB GB9424778A patent/GB2283214B/en not_active Expired - Fee Related
- 1994-05-09 JP JP6525282A patent/JPH08509929A/en not_active Ceased
- 1994-05-09 AU AU67623/94A patent/AU6762394A/en not_active Abandoned
- 1994-05-09 EP EP94915712A patent/EP0697975A1/en not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9426576A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| NO931734D0 (en) | 1993-05-13 |
| GB9424778D0 (en) | 1995-02-15 |
| JPH08509929A (en) | 1996-10-22 |
| AU6762394A (en) | 1994-12-12 |
| GB2283214B (en) | 1996-12-04 |
| WO1994026576A1 (en) | 1994-11-24 |
| GB2283214A (en) | 1995-05-03 |
| NO931734L (en) | 1994-11-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19951204 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR IT NL |
|
| 17Q | First examination report despatched |
Effective date: 19961126 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19980721 |