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Process for applying a paint film onto for example a car body part

IP.com Disclosure Number: IPCOM000241951D
Publication Date: 2015-Jun-10
Document File: 6 page(s) / 251K

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The IP.com Prior Art Database

Abstract

A large trend in automotive industry are so called contrast or bi-tone roofs, where the roof color differs to the vehicle color. One way of producing cars with such a roof is an additional paint process where the roof is painted with a different color. In this process the car has to be prepared in a time consuming manner with the following steps: masking, painting the 2nd color on the roof, drying, demasking and finally quality inspection.

This Publication refers to a process of application of an adhesive film onto e.g. a roof area of an automobile.

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Process for applying a paint film onto for example a car body part

Introduction

A large trend in automotive industry are so called contrast or bi-tone roofs, where the roof color differs to the vehicle color. One way of producing cars with such a roof is an additional paint process where the roof is painted with a different color. In this process the car has to be prepared in a time consuming manner with the following steps: masking, painting the 2nd color on the roof, drying, demasking and finally quality inspection.

This Publication refers to a process of application of an adhesive film onto e.g. a roof area of an automobile.

In the car wrap scene films are well known for customization. They are applied in manual process steps. Commonly used film material for these applications is for example PVC. There are also films on the market that are based on other chemistries such as for example PU based films. Those films may be very thin and soft and therefore hard to apply. The films usually provide one side that is visible after the film has been applied and a second side, with an adhesive layer that is not visible after the film has been applied. The adhesive layer side is usually covered with a liner.

General film application process

The following is a general, brief description of a process for applying a film to a car body roof. The film is delivered and provided from roll where the needed amount of film is rolled off and cut. The film may also be provided in precut pieces, with a shape that fits to the roof part the film has to be applied to, that do not have to be cut at the end of the process. Afterwards the film is held and positioned above the roof surface under tensile stress in for example transversal and if needed in longitudinal direction. Film and roof are moved closer to each other until they contact each other. Either the film is moved towards the car body part or the car body part is moved towards the film. An application tool uses pressure to bond film to the curved surface of the car body part. After the film is applied overlapping material may need to get cut.

Description of film handling device

Key aspect for the application of a soft and flexible film is the handling. In order to have control and proper positioning properties towards the substrate the following points have been worked out.

1. Uniform and continuous film holding over length


To prevent wrinkle formations on the film before and during the application it has been found that a uniformly and continuously film holding over the whole film length is important. Therefore the film holding means have to be set up such, that they hold the length over its entire length. Punctual tensioning, interuptions or misalingnment of the holding means for example in the film holding areas can lead to wrinkling effects in the film itself.

2. Controled film tensioning


In order to have control and proper positioning properties towards the substrate, the film needs to be t...