A composite core rapid pultrusion dipping process and its special dipping device

Abstract

The invention discloses a gum dipping technology and special gum dipping device for quick pultrusion of a composite core. The gum dipping device comprises a tool support, a yarn dividing frame, a gum dipping tank, a gum extruding roller, a yarn divider, a yarn collector, a precuring mould, a curing mould, a resin barrel, a control valve and a gum guiding pipe; the yarn divider is arranged on the tool support; the gum dipping tank is arranged below the tool support; the gum extruding roller and the yarn divider are sequentially arranged in the running direction of fibers; an outlet of the yarn divider is divided into two ways, one way sequentially passes through the precuring mould, the yarn collector and the curing mould, and the other way sequentially passes through the yarn collector and the curing mould; an outlet of the resin barrel is communicated with the gum dipping tank through the gum guiding pipe, and the gum guiding pipe is provided with the control valve. According to the gum dipping technology and special gum dipping device for quick pultrusion of the composite core, the resin barrel is provided with the control valve, the resin flow is adjusted through the control valve, resin can be injected into the gum dipping tank at the stable and continuous speed, when the resin flow and the resin amount used by pultrusion keep balanced, the freshness of the resin in the gum dipping tank is stable, and therefore the quality of a core rod obtained through pultrusion is stable.

Description

technical field [0001] The invention relates to a rapid pultrusion dipping process for a composite core and a special dipping device thereof. Background technique [0002] One of the main reasons affecting the performance stability of composite cores is resin aging. There are many reasons for resin aging. The first is that epoxy resin and curing agent are mixed together, which will gradually react in the dipping tank. There must be a difference between the performance of the mandrel at the beginning of pultrusion and the performance of pultrusion for a period of time. . The second is that the pultrusion speed is too slow, the resin in the dipping tank is updated slowly, the resin is seriously aged, and the viscosity increases, causing scratches on the carbon fiber and affecting the quality. Once again, pultrusion passes through the die, a large part of the resin is extruded at the die port, and returns to the dipping tank. This part of the resin is exposed to high temperat...

AI Technical Summary

Problems solved by technology

When the resin ages to a certain extent, the resin in the impregnation tank needs to be replaced, and this part of the resin is wasted

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