A method for pressing and forming a liner and a special device thereof

Abstract

The invention relates to a compression molding method for a liner tube and a special device for the method, and belongs to the technical field of manufacturing processes. The device is technically characterized by comprising an upper heating plate, an upper cavity, an upper fixing plate, guide sliding plates, locking blocks, a sliding cavity, stop blocks, compression springs, pull rods, a lower heating plate, a lower fixing plate, a core mold, a lower cavity, lower limiting columns, guide sleeves, guide holes, upper limiting columns and guide column pairs. A bidirectional compression method for horizontal compression through the sliding cavity and vertical compression through the upper and lower cavities is adopted; through the process steps of preheating at a certain temperature, compression, pressurization, temperature rise, pressure maintaining and the like, a heat insulation liner tube is uniformly molded and solidified under the conditions of high pressure and temperature rise. The special device is simple and reasonable in structure, easy to operate and maintain, and low in compression cost. The molded heat insulation liner tube is high in density, good in fiber continuity, pressure resistance and shearing resistance, and resistant to high-temperature erosion.

Description

technical field [0001] The invention relates to a liner press-forming method and a special device thereof, belonging to the technical field of manufacturing technology, and is mainly applicable to the multi-directional press-form manufacture of engine nozzle heat-insulating liners. Background technique [0002] In the background technology, at present, the following two methods are mainly used for the processing and molding of the engine thermal insulation liner in China: one is to wind the carbon fiber on the mandrel by hand and then place it in a pressure vessel for pressing; the other is to manually wrap the carbon fiber The carbon fiber is wound on the mandrel, and then placed together in the pressing mold that opens and closes up and down for pressing. The obvious defects of the heat-insulating liner formed by the above two methods are: when the autoclave method is used for pressing, the outer diameter of the heat-insulating liner does not change before and after pressi...

AI Technical Summary

Problems solved by technology

The obvious defects of the thermal insulation liner formed by the above two methods are: when the autoclave method is used for pressing, the outer diameter of the thermal insulation liner does not change before and after pressing, and the excess dipping in the carbon fiber does not overflow, and the inside of the liner Containing more rubber components, the density and shear strength of the liner are difficult to meet the requirements; when pressing with the method of opening and closing the mold up and down, during the pressing molding process, the opening and closing mold only moves up and down in one direction. During the pressing process, When the carbon fiber flows under pressure, the opening and closing mold is easy to shear the carbon fiber, destroying the continuity of the carbon fiber of the thermal insulation liner, thereby reducing the shear strength of the liner

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