As we know, the current advances in 3D printing technology depend to a large extent on the development of 3D printing materials . At the industrial level, there are already many 3D printing technologies based on metals, plastics and other materials available. For our common FDM technology, although the materials used in this technology are mainly limited to plastics, the emerging new materials with outstanding properties are greatly expanding their applications. For example, 3D Hubs, the world's largest distributed 3D printing platform, has teamed up with 3D printer manufacturer Markforged to launch a series of nylon 3D printing materials reinforced with Kevlar, fiberglass and carbon fiber.
It is understood that these new materials are specifically designed to create 3D printed parts that are comparable in strength to metal but cost plastic. In fact, these innovative dimensional reinforcements offer a higher strength-to-weight ratio than 6061-T6 aluminum, which is 27 times more stiff and 24 times stronger than ABS parts.
It is reported that this super-strong material will be provided by 17 3D Hubs-certified suppliers in Europe, the United States and Canada, which are suitable for manufacturing engineering parts, functional prototypes and testing, as well as creating custom-made production parts and structures. Parts, fixtures and other tooling. The 3D Hubs also pointed out that this material is not suitable for 3D printing of small size, high precision components.
So how do high-strength materials like this achieve 3D printing? This would require Markforged's Mark Two industrial-strength 3D printer and patent-pending continuous wire manufacturing (CFF) system with specialized equipment to print this fiber-reinforced nylon material. 3D Hubs explained in a press release: “Adding fiber to the 3D printing process is complicated and requires a professional operator to run the machine. Through our 3D printing service provider network, we are able to provide this specialized technical service. Make this technology available to every professional.
Of course, the characteristics of these three new materials are slightly different. Among them, Carbon-Reinforced Nylon has a higher strength-to-weight ratio than 6061 aluminum, and the thermal conductivity is the highest among the three materials; Kevlar-Reinforced Nylon provides the highest wear resistance. Sexual and elastic, it is suitable for the manufacture of durable and impact resistant parts. Fiberglass-Reinforced Nylon is the most economical of the three materials and offers the same strength as carbon fiber reinforced nylon, but with a 60% lower hardness.
In addition, 3D Hubs offers several tips for those who are ready to use these advanced fiber reinforced nylon design parts. First, as mentioned earlier, this material is not suitable for making small and complex part designs with a minimum detail size of 0.8 mm or more. In addition, the minimum feature size of the reinforcement component should be 3 mm, and should be reduced to 1.6 mm if it is a pure nylon component.
In addition, 3D Hubs stated that if you want 3D printing of active or interlocking parts, be sure to leave at least 0.5 mm of clearance. As far as the wall thickness is concerned, the size is the same as the minimum feature size, that is, if it is fiber reinforced nylon, you will need a wall thickness of at least 3 mm, while pure nylon is only 1.6 mm.
It is reported that the technology of 3D printing using fiber reinforced nylon is based on FDM technology, but a second print head is integrated on the machine. The main function of the print head is to implant continuous carbon fiber, Kevlar fiber and glass fiber. Printed in nylon. 3D Hubs added on its website: "These long, continuous fibers will carry the load of the entire object, thus demonstrating the amazing performance of the composite. â€
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