초록 ▼

An apparatus for manufacturing composite parts produced by resin transfer molding (RTM) is configured to operate in controlled flow-rate mode or controlled pressure mode to use the RTM technique for manufacturing large-sized composite parts with a low fiber content. In both modes, control is by mean

An apparatus for manufacturing composite parts produced by resin transfer molding (RTM) is configured to operate in controlled flow-rate mode or controlled pressure mode to use the RTM technique for manufacturing large-sized composite parts with a low fiber content. In both modes, control is by means of a fuzzy logic control card. In controlled flow-rate mode the resin is injected alternately by two injection cylinders (40a and 40b) controlled by motors whose speed is controlled. In controlled pressure mode the resin is injected directly from resin supply vessels (16) subjected to pressure controlled by an air regulator (30).

대표청구항 ▼

[ What is claimed is:] [1.] Apparatus for manufacturing composite parts by resin transfer molding comprising:at least one mold able to accept a fibrous preform;means for compressing the preform in the mold;at least one resin supply vessel;at least one injection cylinder for injecting the resin into

[ What is claimed is:] [1.] Apparatus for manufacturing composite parts by resin transfer molding comprising:at least one mold able to accept a fibrous preform;means for compressing the preform in the mold;at least one resin supply vessel;at least one injection cylinder for injecting the resin into the mold;control means configured to operate the apparatus in controlled flow-rate mode in which the resin is transferred from the resin supply vessel to the injection cylinder before being injected into the mold by the cylinder at a generally constant rate, and in which the compressing means generally ensure that the fibrous preform is highly compressed, and in a controlled pressure mode wherein the resin is injected directly into the mold by the resin supply vessel at a generally constant rate and wherein the compressing means generally ensure weak compression of the fibrous preform; andmeans of switching the control means between the controlled flow-rate and controlled pressure modes,wherein the control means acting on a three-way valve comprise an inlet connected to the resin supply vessel, a first outlet connect to the injection cylinder and a second outlet connected to the mold, the inlet of the three-way valve being connected to the first outlet in controlled flow-rate mode and to the second outlet in controlled pressure mode.