Papers by Keyword: LCM

Abstract: The manuscript reviews the additive manufacturing technology. The principle of operation of the most popular and new AM methods was discussed. the manuscript presents the possibility of skewing different materials for individual technologies. Additive manufacturing technologies have been described that can manufacture parts from polymers, metals, ceramics and composites.

Abstract: In this paper, setting up a mathematical mold for LCM filling process, which contains sink term. The control volume/finite element method is used to build finite element equation for three-dimensional preforms pressure field and get the solution. Numerical simulation of pressure field that resin flowing in three-dimensional dual-scale porous medium is achieved.

Abstract: The present research work assesses the manufacture of long fiber thermoplastic matrix composite materials (GreenComposites). Thermoplastic matrices are too viscous to be injected into the conventional LCM (Liquid Composite Molding) molds, and then epoxy, polyester or vinylester resins are used. Nevertheless, the groundbreaking anionic polymerization of caprolactam allows such a synthesis of a thermoplastic APA6 matrix inside the mold. This matrix is sintered from the starting monomers, and presents high mechanical performance and recyclability. In order to do the reactive injection in a LCM mold, it is necessary to control the polymerization mechanism of such a thermoplastic matrix. This paper puts special emphasis on detecting and solving all problems which arose during synthesis. For instance, moisture values were assessed for all starting reactants, since humidity keeps polymerization from occurring. It is thought that once the synthesis and the resulting material characterization are well controlled, the manufacture of GreenComposites through in situ polymerization, as well as addition of state-of-the-art fabrics such as basalt, can proceed successfully.

Abstract: According to the manufacturing procedure of liquid crystals modules (LCM), several display distortions of LCM, such as S line distortion, G line distortion, line short-circuit and cs-open are introduced. Combined with its internal structure and its working principle, key causes and repair methods of these distortions are focused on. The pass rate of the product is improved. A foundation has been laid on research in automated diagnosing systems which based on image processing and circuit parameter diagnosing technology.