Method for fast mfg. metal/high-molecular composite material parts

Abstract

A process for quickly preparing the metal / high-molecular material workpiece includes such steps as preparing the immersing liquid through proportionally mixing epoxy resin with phenolic resin or modified organosilicon, heating to 60-80 deg.C, adding methyl tetrahydrophenyl diformic anhydride and stirring, preparing the workpiece blank from metal and high-molecular material, degreasing, sintering to become porous blank, immersing it in said immersing liquid at 90-110 deg.C until no air bubbles, solidifying at 140-180 deg.C, and cooling.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing, in particular to a rapid prototyping method for metal / polymer composite material parts. Background technique [0002] At present, the traditional manufacturing methods of metal / polymer composite parts mainly include: squeeze casting method, vacuum-air pressure casting method, powder metallurgy method, diffusion bonding method, extrusion method, rolling method, etc. Among them, the squeeze casting method is to first make the reinforcing agent into a preform, put it into a fixed mold and preheat it to a certain temperature, pour the metal melt, press down the male mold and pressurize it, and quickly cool it down and then demould it. Parts, this method has the advantage of improving the wettability of the metal melt and eliminating defects such as pores, but the requirements for equipment are relatively high and the process is complicated. The vacuum-air pressure casting method is relatively n...

AI Technical Summary

Problems solved by technology

Among them, the squeeze casting method is to first make the reinforcing agent into a preform, put it into a fixed mold and preheat it to a certain temperature, pour the metal melt, press down the male mold and pressurize it, and quickly cool it down and then demould it. Parts, this method has the advantage of improving the wettability of the metal melt and eliminating defects such as pores, but the requirements for equipment are relatively high and the process is complicated

The vacuum-air pressure casting method is relatively new and considered to be a better method. This method is to make a preformed body into the mold cavity with a reinforcing agent, heat and vacuum, and then press the metal melt into the mold cavity with air pressure. , rapid cooling and demoulding, because this method is vacuum first and then lower pressure, so the damage to the fiber is small, and its mechanical properties are better than extrusion, but the process is also very complicated, and the equipment requirements are also high

The powder metallurgy method is to sprinkle a layer of metal powder on the long polymers arranged, alternately overlap the fibers and metal powder, cold press, and then sinter to shape. The advantage of this method is that the manufacturing temperature is low, and it is suitable for a variety of metal substrates and high The disadvantage of the combination of molecules is that the polymer chain segment is damaged, the distribution is uneven, the content is not high, and the process is complicated

The diffusion bonding method is to make a precursor wire by impregnating the reinforcing agent with metal after surface treatment, and then laminate it with metal foil (or powder) under vacuum conditions (or protective atmosphere) and at a temperature slightly lower than the melting point of the metal. Bonding molding, this method has little fiber loss and high density of the composite material, but the production efficiency is low and the equipment requirements are high

The extrusion or rolling method combines the polymer with the layered matrix. The advantage of this method is that the interface reaction is small and the orientation is regular. The disadvantage is that the chain segment of the polymer is easily damaged, and the type of metal matrix is ​​also limited, and the cost requirement is high.

To sum up, the current manufacturing methods of metal / polymer composite parts are not only complicated in manufacturing process, high in manufacturing conditions, low in production efficiency and high in cost requirements, but also difficult to control the precision and strength of parts

Therefore, the manufacturing method of traditional metal / polymer composite parts has greatly hindered its large-scale production and application.

Images