Injection type two-component epoxy pultrusion glue-injection system

Abstract

The invention discloses an injection type two-component epoxy pultrusion glue-injection system. The system comprises an epoxy resin glue-injection machine, a glue-injection mold, a heat insulation mold and a solidification mold which are connected in sequence. The epoxy resin glue-injection machine comprises a first storage pot, a second storage pot, a first gear metering pump, a second gear metering pump, a dynamic mixing gun, a first heat preservation pipeline and a second heat preservation pipeline. The first storage pot and the second storage pot are made converge to the dynamic mixing gun through the first heat preservation pipeline and the second heat preservation pipeline respectively. The dynamic mixing gun is connected with the glue-injection mold. The first gear metering pump and the second gear metering pump are connected to the first heat preservation pipeline and the second heat preservation pipeline respectively. The injection type two-component epoxy pultrusion glue-injection system can be applicable to an epoxy resin high-viscosity system, and can also be applicable to polyurethane and other two-component systems; pultrusion sectional materials with any length can be manufactured, the surface properties of the obtained pultrusion products in the length direction are consistent, and phenomena such as grooves and bubbles are avoided.

Description

technical field [0001] The invention relates to an injection type two-component epoxy pultrusion glue injection system, which belongs to the field of pultrusion. Background technique [0002] The pultrusion molding process is to form and solidify continuous glass fiber bundles, tapes or cloth impregnated with resin glue through extrusion dies under the action of traction, and continuously produce FRP profiles of unlimited length. This process is currently widely used to produce FRP profiles of various cross-sectional shapes, such as rods, tubes, solid profiles (I-shaped, trough-shaped, square profiles) and hollow profiles (door and window profiles, blades, etc.). [0003] The currently used pultrusion resins mainly include epoxy resin, polyurethane resin, unsaturated resin and vinyl resin. For unsaturated resin and vinyl resin, the amount of curing agent added is very small, so there is no need to use special equipment to control the injection of glue separately, and then r...

AI Technical Summary

Problems solved by technology

For unsaturated resin and vinyl resin, the amount of curing agent added is very small, so there is no need to use special equipment to control the injection of glue separately, and then realize mixed use through mixing parts; for polyurethane resin, due to the low viscosity of polyurethane resin, it is difficult for equipment The requirements are not high. At present, more suitable glue injection equipment has been put into the market in China; and due to the particularity of epoxy resin properties, such as relatively high viscosity, difficult proportion control, and low dosage per unit time, etc., the injection equipment There are high requirements for structure, performance and function. Although there are related reports about epoxy resin injection equipment, there are defects such as complex structure, unstable control, and poor strength of the produced products, especially for special applications. The pultruded products in the field not only require high tensile strength of the product, but also put forward higher requirements for the surface and size of the product. Some pultruded profiles are as long as 50 meters or even longer, which requires the process to be very stable and reduce The product is scrapped due to straightness and other reasons, and the surface performance of this type of product is required to be consistent in the length direction, and there will be no hidden dangers of strength at this point due to phenomena such as grooves, and the products will not be damaged due to moisture and oxidation of the resin in contact with the air. The decline in mechanical properties puts forward higher requirements for the flow stability, ratio control stability, corresponding mold design and inertia protection of epoxy resin injection equipment. At present, there is no equipment that meets the requirements.

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