| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 4.38 MB | Adobe PDF |
Authors
Advisor(s)
Abstract(s)
O setor automóvel é um dos mais competitivos e tem a obrigação de cumprir requisitos exigentes, ao nível da cor e do metamerismo dos artigos. A presente dissertação foi realizada na empresa TMG Automotive e teve como objetivo a criação e testagem de uma base de dados de pigmentos para formulações de cor. A pesquisa de informação sobre o funcionamento software representou a etapa inicial do trabalho, que foi fundamental para o desenvolvimento do mesmo. Para criar a base de dados colorimétrica foi necessária a produção de amostras de PVC com diferentes concentrações dos diversos pigmentos existentes e, posteriormente, procedeu-se à introdução dos dados espetrais obtidos pela leitura desses filmes. De seguida, para testar a funcionalidade da base de dados melhoraram-se receitas de cor já existentes, criaram-se novas formulações de cor e auxiliaram-se os acertos da produção corrente. A partir da base de dados criada, o software permitiu, de um modo geral, obter formulações dentro das especificações impostas, com custo um aceitável e uma opacidade suficiente. No futuro, sugere-se a continuidade do estudo para a resolução das limitações encontradas e consequente melhoria do desempenho da base de dados criada. Para além disso, aconselha-se a criação e testagem de uma base de dados semelhante para tintas aplicadas em lacas, que possa auxiliar os acertos na etapa de lacagem. Com o trabalho desenvolvido a empresa pode economizar consideravelmente o tempo e os recursos investidos na formulação e nas correções das cores dos artigos produzidos, que antes da base de dados existir eram realizadas por tentativas. Por outro lado, o desperdício será reduzido significativamente, o que provoca um aumento do rendimento da empresa.
The automotive industry is one of the most competitive sectors worldwide and has the need to meet demanding requirements regarding the colour and metamerism of the finished materials. The present thesis was realized at TMG Automotive company and aimed to create and test a database of pigments for colour formulations. The search for information about the functioning of the software represented the initial step of the work which was fundamental for all development. To create the colorimetric database, it was necessary to produce PVC samples with different concentrations of existing pigments and after that these films were measured and all the colour information was saved. Then, to test the functionality of the database, existing colour recipes were improved, new colour formulations were created, and colour adjustments for the current production were made. Overall, with the database created, the software made it possible to obtain formulations within the imposed specifications, with sufficient opacity and acceptable cost. As a future work, the continuity of the study to solve the limitations found in the created database is suggested. In addition, it is advisable to create and test a similar database for inks (pigment applied to lacquers), which can help with adjustments in lacquering. With the work developed, the company can considerably save the time and resources invested in the study of formulations and colour adjustments of the materials produced, which, before the existence of the database, were carried out by work experience and trials. On the other hand, waste will be significantly reduced, which leads to an increase in the company's income.
The automotive industry is one of the most competitive sectors worldwide and has the need to meet demanding requirements regarding the colour and metamerism of the finished materials. The present thesis was realized at TMG Automotive company and aimed to create and test a database of pigments for colour formulations. The search for information about the functioning of the software represented the initial step of the work which was fundamental for all development. To create the colorimetric database, it was necessary to produce PVC samples with different concentrations of existing pigments and after that these films were measured and all the colour information was saved. Then, to test the functionality of the database, existing colour recipes were improved, new colour formulations were created, and colour adjustments for the current production were made. Overall, with the database created, the software made it possible to obtain formulations within the imposed specifications, with sufficient opacity and acceptable cost. As a future work, the continuity of the study to solve the limitations found in the created database is suggested. In addition, it is advisable to create and test a similar database for inks (pigment applied to lacquers), which can help with adjustments in lacquering. With the work developed, the company can considerably save the time and resources invested in the study of formulations and colour adjustments of the materials produced, which, before the existence of the database, were carried out by work experience and trials. On the other hand, waste will be significantly reduced, which leads to an increase in the company's income.
Description
Keywords
Base de dados Pigmentos PVC Metamerismo Custo Opacidade Database Pigments Metamerism Cost Opacity