SLS Printing - Shenzhen Hofengfab Precision Manufacturing

Impresión SLS service

Fabricación rápida de prototipos y producción de piezas,Piezas tan rápido como 10 días,Inspección 100% para cada pieza

Nuestra certificación ISO 9001 garantiza la calidad de cada lote

what is SLS 3d printing

Selective Laser Sintering (SLS), also known as selective laser sintering or selective laser sintering technology, was first proposed by Carl Deckard of Texas University in the United States, and the commercial prototype equipment was officially launched on the market in 1992.

Laser sintering 3D printing technology mainly uses the basic principle of high-temperature sintering of powder materials under laser irradiation, and realizes precise positioning through computer-controlled light source positioning device, and then sintering and stacking layer by layer. Therefore, SLS technology also uses the stacking and stacking method. The main difference is that before irradiation, a layer of powder material needs to be laid, and then the material is preheated to a temperature slightly lower than the melting point, and then the laser irradiation device is used to scan the cross section of the layer, so that the temperature of the irradiated part of the powder rises to the melting point, so that it is sintered to form a bond. Then the process of laying powder and sintering is repeated until the entire model is printed.

The SLS process mainly supports powdered raw materials, including metal powder and non-metallic powder, and then stacks them by laser irradiation and sintering principle. The printing principle of SLS is very similar to that of SLA, the main difference lies in the materials used and their forms. The raw materials used by SLA are mainly liquid UV-sensitive curable resins, while SLS uses powdered materials.

how does SLS 3d printing work

√During printing, the entire printing chamber is always kept at a temperature slightly lower than the melting point of the powder material.

√ The material powder is spread on the upper surface of the formed part and scraped flat.

√ A high-intensity CO2 laser is used to irradiate the layer section of the part on the newly laid layer. The material powder is sintered together under the high-intensity laser irradiation and bonded to the formed part below.

√After a layer of cross-section is sintered, a new layer of powder material is laid through the powder laying system, and then the next layer of cross-section is printed.

SLS 3D Printing Materials

Selective laser sintering (SLS) frequently utilizes nylon as its primary material, a versatile engineering thermoplastic renowned for its dual-purpose capabilities in functional prototyping and end-use production.

SLS nylon parts excel in terms of strength, stiffness, and durability. These final products possess remarkable impact resistance, enduring repeated wear and tear without compromising their integrity. Moreover, nylon's inherent resilience against UV exposure, light, heat, moisture, solvents, temperature fluctuations, and water ensures prolonged performance and longevity.

What's more, SLS nylon components can also be biocompatible and non-sensitizing, making them safe for direct contact with the skin and suitable for various applications. This versatility and durability make SLS nylon parts a top choice for numerous industries, from automotive to medical, where robust and long-lasting components are paramount.

Ventajas e inconvenientes del SLS

Ventajas del SLS:

(1) Puede fabricar productos de gran resistencia y excelentes propiedades materiales, e incluso puede utilizarse directamente como producto final.
(2) Hay muchos tipos de materias primas disponibles, como plásticos técnicos, cera, metal, polvo cerámico, etc.
(3) El tiempo de construcción de las piezas es corto, y la precisión de los objetos impresos es muy alta
(4) No es necesario diseñar y construir piezas de soporte.

SLS Disadvantages:

(1) Los componentes clave tienen grandes pérdidas y requieren un entorno de laboratorio especial.
(2) Se requiere un control estable de la temperatura durante la impresión, así como precalentamiento y enfriamiento antes y después de la impresión, y el posprocesamiento también es problemático.
(3) El precio de las materias primas y los costes de adquisición y mantenimiento son elevados.
(4) La superficie de moldeo está limitada por el tamaño de las partículas de polvo y el punto láser, lo que afecta a la precisión de la impresión.
(5) Es imposible imprimir directamente un diseño hueco completamente cerrado, y es necesario dejar agujeros para eliminar los materiales en polvo.

Otras capacidades de fabricación

Estamos especializados en impresión 3D, mecanizado CNC, fundición en vacío, moldeo por inyección y fabricación de chapa metálica, ofreciendo una amplia variedad de materiales y acabados superficiales.

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