O PLA é um dos materiais mais populares usados ​​na impressão 3D de mesa. É o filamento padrão escolhido para a maioria das impressoras 3D baseadas em extrusão, pois pode ser impresso em uma temperatura baixa e não requer mesa aquecida. O PLA é um ótimo primeiro material para usar quando você está aprendendo sobre impressão 3D porque é fácil de imprimir, muito barato e cria peças que podem ser usadas em uma ampla variedade de aplicações. É também um dos filamentos mais ecológicos do mercado atualmente. Derivado de ingredientes como amido de milho, cana de açúcar e raiz de tapioca, o PLA é de fonte renovável e, mais importante, biodegradável. Como um bônus, isso também permite que o plástico exale um aroma doce durante a impressão.

Prós

Contras

Melhores práticas

Ajuste fino das retrações para evitar vazamento:

Um dos problemas mais comuns com PLA está em gotejamento. Como o filamento flui com relativa facilidade quando comparado com os outros materiais, ele tende a continuar fluindo durante os movimentos de deslocamento no final de um segmento. Isso cria fios ou cabelos de sua parte, e ajustar suas configurações de retração é a melhor maneira de combater esse comportamento! Diferentes marcas de PLA e diferentes impressoras podem precisar de configurações de retração ligeiramente diferentes, portanto, você pode precisar fazer experiências para encontrar o melhor valor para sua impressora. Simplify3D adicionou um recurso muito útil na  versão 4.0 que pode ajudar com isso, permitindo que você tente rapidamente dezenas de configurações diferentes e, em seguida, observe a parte final para determinar qual funcionou melhor em sua configuração específica. Por exemplo, você pode configurar dois pilares verticais que são impressos lado a lado para avaliar o encordoamento ao se mover para frente e para trás entre cada pilar. Em seguida, vá para Ferramentas> Assistente de configurações de variáveis ​​e escolha como deseja ajustar as configurações durante a impressão. Por exemplo, você pode tentar uma distância de retração diferente para cada seção de 20 mm da impressão e, a seguir, escolher o valor que funciona melhor no final.

Otimize suas configurações de resfriamento:

O resfriamento é um dos aspectos mais importantes da impressão com PLA. Ter um ventilador de resfriamento de peças dedicado faz uma grande diferença na qualidade das peças impressas. O plástico recém-extrudado precisa esfriar abaixo da temperatura de transição vítrea o mais rápido possível. Isso impedirá que o plástico sofra stringing (fios indesejados) e produza outros artefatos. Recomendamos definir a ventilação para 100% durante toda a impressão, exceto para as primeiras 1-2 camadas, onde você deseja formar uma forte ligação com a base de impressão. Simplify3D também inclui uma opção útil na guia Resfriamento das configurações do processo que pode reduzir automaticamente a velocidade de impressão de peças pequenas, garantindo que as camadas tenham tempo suficiente para esfriar. Isso pode melhorar muito a qualidade de impressão, permitindo que a camada solidifique antes de imprimir a próxima camada sobre ela.

Escolha a temperatura correta da extrusora:

Esta é uma ótima dica para qualquer filamento, mas é especialmente útil para PLA, que geralmente contém diferentes combinações de aditivos dependendo do fabricante. Esses diferentes aditivos podem levar a variações na temperatura de impressão entre 190-230 graus Celsius. Se você não estiver imprimindo na temperatura certa, isso pode levar a vários problemas de qualidade de impressão, incluindo oozing (gotejamento), stringing (fios indesejados) e under-extrusion (subextrusão). O PLA também pode ser combinado com diferentes preenchimentos como metal, madeira e fibra, que fornecem características diferentes de um PLA homogêneo padrão. Isso pode exigir configurações diferentes ou até mesmo uma impressora diferente. Certifique-se de verificar as especificações do fabricante de seu filamento para verificar a temperatura ideal a ser usada. Se você tiver problemas de stringing (fios indesejados), tente reduzir a temperatura em 5 a 10 graus, o que ajudará a evitar o excesso de gotejamento. Se você tiver problemas com under-extrusion (subextrusão), tente aumentar a temperatura em 10 graus para que o material flua mais facilmente através do bico.

Dicas Profissionais

Comece com PLA

Agora que você está pronto para começar a imprimir com PLA, aqui estão mais algumas informações para ajudá-lo a começar. Comece desenvolvendo projetos com aplicações comuns, experimente um dos projetos de amostra fornecidos ou encontre um novo filamento para experimentar em nossa lista de marcas de materiais populares.

Aplicações comuns:

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