Polyurethane pultrusion overall injection mold and using method thereof

Abstract

The invention discloses a polyurethane pultrusion overall injection mold and a using method thereof. The polyurethane pultrusion overall injection mold comprises a mold main body. The mold main body comprises a lower mold and an upper mold. Electric heating pieces are fixed to the left end of the mold main body, a material injection opening is formed in the top surface of the mold main body, and a base plate, a supporting strip, a right end feeding supporting plate and a middle supporting plate are fixed to the right end of the mold main body. After the polyurethane pultrusion overall injection mold is erected, the two electric heating pieces start heating; felt cloth is input to the middle supporting plate through an inner-layer felt cloth feeding hole; a glass fiber filament is guided into the middle supporting plate through a glass fiber filament inlet hole; then outer-layer felt cloth is guided onto the middle supporting plate from an outer-layer felt cloth feeding hole in the periphery of the glass fiber filament inlet hole; in the forward process, a polyurethane matrix starts to be injected into the material injection opening; in order to avoid heat solidification of the polyurethane matrix, a cooling area is especially arranged on the left side of the material injection opening; and after a resin matrix, the felt cloth and glass fiber bundles are fully combined, temperature rise solidification is conducted at the left end of the mold main body.

Description

technical field [0001] The invention belongs to the technical field of polyurethane composite fiber pultrusion molding dies, and in particular relates to a polyurethane pultrusion integral injection mold and a use method thereof. Background technique [0002] As we all know, in the past two years, in the field of FRP pultrusion profile production, a new material has been developed. Compared with traditional FRP, it has higher efficiency and extremely low pollution of polyurethane resin. Most of the existing production molds are drawn by traditional FRP. However, the existing pultrusion mold has disadvantages, which are mainly manifested in the fact that the existing mold is a split type, the main body of the mold is fixed by bolts, and there is a gap at the joint of the mold. During output, there are burrs at the junction between the molds, resulting in poor quality of molded products. Moreover, the existing mold cooling and heating parts are not designed properly, and the h...

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Problems solved by technology

[0002] As we all know, in the past two years, in the field of FRP pultrusion profile production, a new material has been developed. Compared with traditional FRP, polyurethane resin is more efficient and has extremely low pollution. Most of the existing production molds are drawn by traditional FRP. However, there are disadvantages in the existing pultrusion mold, which is mainly manifested in the fact that the existing mold is a split type, the main body of the mold is fixed by bolts, and there is a gap at the joint of the mold. During the output, there are burrs at the joint between the molds, resulting in poor quality of the molded product. Moreover, the existing mold cooling and heating parts are not designed properly, and the heating zone of the molding mold cannot be effectively isolated from the cooling zone, which may easily lead to the formation of the molding area. The connection effect is poor, which affects the molding quality of pultruded products

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