Additive manufacturing methods for fabricating a fiber-reinforced composite objects include providing at least a first layer of powder material 210, disposing a fiber material adjacent the at least first layer of powder material to form a fiber reinforcement layer 220, and applying a laser energy 230 to the at least first layer of powder material so as to fuse the powder material into at least a first laser fused material layer adjacent the fiber reinforcement layer of the fiber-reinforced composite object.

Additive manufacturing methods and systems with fiber reinforcement

A method of forming the body portion of a three-dimensional object from a polymerizable liquid by the process of continuous liquid interface printing is described. The body portion has a plurality of contiguous segments, and the process includes advancing a carrier for the object away from a build surface while irradiating a build region between the carrier and build surface in a pattern of advancing and irradiating defined by an operating mode. In the present invention, the operating mode is changed at least once during the formation of the body portion for different contiguous segments of the body portion.

Fabrication of three dimensional objects with multiple operating modes

A method of forming a three-dimensional object, is carried out by: providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; filling the build region with a polymerizable liquid, intermittently irradiating the build region with light through the optically transparent member to form a solid polymer from the polymerizable liquid, and continuously or intermittently advancing the carrier away from the build surface to form the three-dimensional object from the solid polymer. In some embodiments, the filling, irradiating, and/or advancing steps are carried out while also concurrently: (i) continuously maintaining a dead zone of polymerizable liquid in contact with the build surface, and (ii) continuously maintaining a gradient of polymerization zone between the dead zone and the solid polymer and in contact with each thereof, the gradient of polymerization zone comprising the polymerizable liquid in partially cured form.

Method of additive manufacturing by intermittent exposure

The invention relates to a method for preparing a complex-shape composite material hot-working mold through 3D printing and belongs to the technical field of mold preparation. Firstly, nanometer No powder and nanometer TiC ceramic powder are subjected to mixing and ball milling, and then H3 steel powder is added to be subjected to ball milling to obtain a composite material; through drawing software, a three-dimensional model with a needed space structure is drawn, H3 steel powder is poured into a 3D printer, a model rudiment with a complex shape is printed, and the unprinted allowance of 20 mm is reserved at a mold cavity; printing equipment is temporarily stopped, the steel powder is replaced by the Ni powder, and a layer of ordinary pure Ni powder is printed on the position, located onthe inner surface of a hot-working mold steel material, of the mold cavity of the mold rudiment; and the printing equipment is temporarily stopped, the Ni powder is replaced by the composite material,printing continues being conducted on the printed pure Ni layer surface, a formed mold piece is cleaned, scraped and polished, and the mold is subjected to elaborate polishing treatment to obtain thecomplex-shape composite material hot-working mold. The complex-shape composite material hot-working mold prepared by the method is even in structure and good in mold performance.

Method for preparing complex-shape composite material hot-working mold through 3D printing

The invention provides a preparation method of a carbon fiber and metal material as well as a manufacturing method of a carbon fiber and metal object. The preparation method of the carbon fiber and metal material comprises the steps as follows: a to-be-sintered material includes mixed metal powder and fibers, the fibers are nanoscale or micron-sized fibers, the to-be-sintered material is sintered by the aid of laser, and the carbon fiber and metal composite material is obtained. The mechanical strength of a metal material prepared through traditional laser sintering is weaker than that of forgings; and the mechanical performance and the abrasion resistance of the carbon fiber and metal material formed through mixing with the nanoscale fibers and sintering are substantially improved. The manufacturing method of the carbon fiber and metal object comprises the steps as follows: the to-be-sintered material is partially sintered with the selective laser sintering (SLS) technology, the carbon fiber and metal object is obtained, and the to-be-sintered material includes the mixed metal powder and fibers. The manufacturing method is similar to the preparation method of the carbon fiber and metal material, the mechanical strength and the abrasion resistance of metal powder after sintering are improved, and accordingly, the defect of relatively weak mechanical strength of a metal object produced with the SLS technology is overcome.

Preparation method of carbon fiber and metal material as well as manufacturing method of carbon fiber and metal object

Manufacturing method of selective laser sintering composite material enhanced with nano-materials

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Manufacturing method of selective laser sintering composite material enhanced with nano-materials