5 results about "Reaction injection molding" patented technology

The present invention relates to a method for manufacturing an exterior trim part (20) for vehicles using a reaction injection molding process in a reaction injection mold (1), comprising the following steps: providing a carrier substrate (2) made of a first plastic material, which is at least partially planar, wherein the carrier substrate (2) has an opening (3) through the carrier substrate (2) and a first side (a) and a rear side (b) opposite the first side (a); positioning the carrier substrate (2) within a cavity of the reaction injection mold (1) formed by two mold halves (A, B), wherein, in the closed state of the reaction injection mold (1), an additional cavity (4) remains free within the cavity between the first side (a) of the carrier substrate (2) and one of the mold halves (A) of the reaction injection mold (1);Introducing a further plastic material into the additional cavity (4), wherein the further plastic material, after its solidification or hardening, forms a cover layer (5) on or over the first side (a) of the support substrate (2). When introducing the further plastic material into the additional cavity (4), in addition to forming the cover layer (5), the flank (10) is also sealed with the further plastic material, whereby an unintended overspray of the back (b) of the support substrate (2) is prevented by means of a sealing edge (7, 8) or by means of several sealing edges (7, 8).

The present invention relates to a method for manufacturing an exterior trim part (20) for vehicles using a reaction injection molding process in a reaction injection mold (1), comprising the following steps: providing a carrier substrate (2) made of a first plastic material, which is at least partially planar, wherein the carrier substrate (2) has an opening (3) through the carrier substrate (2) and a first side (a) and a rear side (b) opposite the first side (a); positioning the carrier substrate (2) within a cavity of the reaction injection mold (1) formed by two mold halves (A, B), wherein, in the closed state of the reaction injection mold (1), an additional cavity (4) remains free within the cavity between the first side (a) of the carrier substrate (2) and one of the mold halves (A) of the reaction injection mold (1);Introducing a further plastic material into the additional cavity (4), wherein the further plastic material, after its solidification or hardening, forms a cover layer (5) on or over the first side (a) of the support substrate (2). When introducing the further plastic material into the additional cavity (4), in addition to forming the cover layer (5), the flank (10) is also sealed with the further plastic material, whereby an unintended overspray of the back (b) of the support substrate (2) is prevented by means of a sealing edge (7, 8) or by means of several sealing edges (7, 8).

This invention belongs to the field of polydicyclopentadiene products, specifically relating to a molding method for a high-filler polydicyclopentadiene composite material. The molding method includes the following steps: mixing and extruding a combination liquid A and a combination liquid B in a twin-screw extruder; the resulting liquid extrudate enters a mold cavity for polymerization molding; during the mixing and extrusion process, dicyclopentadiene polymerization does not occur in the combination liquid A and combination liquid B. This invention utilizes the characteristics of high-filler dicyclopentadiene, achieving shear mixing of the combination liquid A and combination liquid B through the forced mixing and compression action of the twin-screw extruder, achieving a material mixing effect essentially consistent with reaction injection molding. This allows for the production of high-filler polydicyclopentadiene composite material products without using reaction injection molding equipment, making the industrial production of polydicyclopentadiene composite material products with higher hardness and heat distortion properties possible.

The application discloses a kind of impact-resistant composite material plate and its preparation method, the matrix of composite material plate is polyurea resin, reinforcing phase is continuous fiber material with filament length ≥1cm, and polyurea resin is wrapped around the continuous fiber material.The preparation method is: when the polyurea resin is slow reaction polyurea resin, the resin transfer molding method is used to form the composite material plate;When the polyurea resin is fast reaction polyurea resin, the reaction injection molding method is used to form the composite material plate.The application uses polyurea as matrix resin material, and uses continuous high-performance fiber as reinforcing material, and the composite material formed by the combination has excellent impact resistance, and can be used in impact resistance, bullet resistance and explosion-proof field.