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CN-121989394-A - Resin infusion mould

CN121989394ACN 121989394 ACN121989394 ACN 121989394ACN-121989394-A

Abstract

The application provides a resin pouring mold, and relates to the technical field of liquid molding. The application has the advantages that the pattern layer comprising the hexagon units is arranged on the surface of the die cavity, the hexagon units are utilized to have excellent space utilization rate and structural stability, the preset space distribution can enable the flow channel to be communicated in a honeycomb-shaped whole domain, the resin is uniformly spread along the channel, the integrally formed pattern layer is tightly attached to the fiber preform, the infiltration blind area is reduced, the infiltration effect of the resin on the fiber is enhanced, the probability of generating defects such as bubble retention and partial filling deficiency is reduced, a reliable die foundation is provided for the production of high-quality composite material parts, and in addition, the resin pouring die is suitable for various cavity forms such as planes and cambered surfaces, and can meet the pouring requirements of special-shaped parts and large-area parts.

Inventors

  • HAN XIN
  • LI MENGYU
  • XIE GUOXIN
  • LUO JIANBIN

Assignees

  • 清华大学

Dates

Publication Date
20260508
Application Date
20260409

Claims (15)

  1. 1. A resin injection mold, comprising: A mold body structure; The pattern layer is arranged on the surface of the cavity of the die main body structure and comprises a plurality of hexagon units which are distributed in a preset space, gaps exist between every two adjacent hexagon units, and all gaps on the pattern layer are communicated to form a resin flow channel in the resin pouring process; and a fiber preform covering the pattern layer.
  2. 2. The resin infusion mold of claim 1, wherein the hexagonal cells are in alternating arrangement with the resin flow channels along the direction of extension from the beginning of the injection to the end of the injection.
  3. 3. The resin infusion mold according to claim 2, wherein the value of the gap width between adjacent hexagonal cells is in the range of 0.5mm to 3mm, and the ratio of the side length of the hexagonal cells to the gap width is in the range of 1.0 to 3.0.
  4. 4. A resin infusion mould according to any of claims 1-3, wherein the surface of the hexagonal cells in contact with the fibre preform and/or the inner wall of the resin flow channel is provided with a micro-nano structured treatment layer.
  5. 5. The resin infusion mold of claim 4, wherein the micro-nanostructure treatment layer comprises a micro-texture array disposed on a surface of the hexagonal cells in contact with the fiber preform.
  6. 6. The resin infusion mold of claim 5, wherein the micro-textured array comprises nano-scale parallel grooves.
  7. 7. The resin infusion mold of claim 6, wherein the extending direction of the nanoscale parallel grooves forms a preset included angle with the glue injection direction, the preset included angle ranges from 30 degrees to 60 degrees, and the glue injection direction is parallel to the extending direction from the glue injection starting end to the glue injection tail end.
  8. 8. The resin infusion mold of claim 4, wherein the micro-nanostructure treatment layer further comprises an array of micro-nano-scale bumps disposed in the resin flow channel.
  9. 9. The resin infusion mold of claim 8, wherein the micro-nano bump array comprises a plurality of pyramid-shaped micro-nano bumps that are continuously distributed along a resin flow direction between a groove wall and a groove bottom of the resin flow channel.
  10. 10. The resin infusion mold according to claim 8, wherein the micro-nano bump array comprises a plurality of micro-nano bumps arranged in an array, the micro-nano bumps have a diameter ranging from 1 μm to 30 μm and a height ranging from 500nm to 50 μm, and the distance between adjacent bumps is 2 μm to 1mm.
  11. 11. A resin injection mold according to any one of claims 1 to 3, wherein the side lengths of the hexagonal cells and the widths of the gaps between adjacent hexagonal cells are gradually increased in the extending direction from the start of injection to the end of injection, The increasing amplitude is determined according to the flow rate attenuation law in the resin filling process and the flow rate and flow resistance compensation relation.
  12. 12. A resin infusion mould according to any of claims 1-3, wherein the mould body structure comprises a metal matrix and a ceramic coating covering the surfaces of the hexagonal cells in contact with the fibre preform and/or the inner walls of the resin flow channels.
  13. 13. The resin infusion mold of claim 12, wherein the metal matrix comprises an aluminum alloy matrix and the ceramic coating comprises an alumina-zirconia composite ceramic coating.
  14. 14. A resin infusion mold according to any one of claims 1 to 3, wherein the resin flow channel has an areal density of 19.5% -86.4%, the areal density being determined according to the area of the resin flow channel and the area of the pattern layer.
  15. 15. The resin infusion mold of claim 14, wherein the resin flow channels have an areal density of 40% -60%.

Description

Resin infusion mould Technical Field The application belongs to the technical field of liquid molding, and particularly relates to a resin pouring die. Background With the increasing urgent demands of high-performance composite materials in the fields of high-end equipment such as aerospace, ship manufacturing and wind power generation, the liquid molding technology has become one of core processes for preparing composite materials by virtue of the advantages of controllable molding, good fiber layering stability and the like. The resin infusion mould is used as key core equipment of the process, and the structural design of the resin infusion mould directly determines the resin flow characteristic and the fiber infiltration quality, so that the molding defect rate and the mechanical property stability of the composite material are affected. In the related art, the diversion channel of the resin infusion mold is designed to be single and solidified, the permeation characteristic of the fiber preform is not considered in the channel shape and distribution, the problem that the resin is rapidly pushed along the channel but does not fully infiltrate the fiber easily occurs, and the prepared composite material generally has the problems of high porosity, unstable mechanical property, low molding qualification rate and the like, so that the severe requirements of high-end equipment on the high precision and low defects of the composite material are difficult to meet. Disclosure of Invention The embodiment of the application provides a resin pouring mold, which has excellent space utilization rate and structural stability by utilizing hexagonal units, wherein the preset space distribution can enable a flow channel to be communicated in a honeycomb-shaped whole domain so as to enable resin to be uniformly spread along the channel, an integrally formed pattern layer is tightly attached to a fiber preform, so that a soaking blind area is reduced, the soaking effect of the resin on the fiber is enhanced, the occurrence probability of defects such as bubble retention and partial filling shortage is reduced, and a reliable mold foundation is provided for the production of high-quality composite material parts. The resin filling mold provided by the embodiment of the application comprises: A mold body structure; The pattern layer is arranged on the surface of the cavity of the die main body structure and comprises a plurality of hexagon units which are distributed in a preset space, gaps exist between every two adjacent hexagon units, and all gaps on the pattern layer are communicated to form a resin flow channel in the resin pouring process; a fiber preform covering the pattern layer. In some embodiments, the hexagonal cells and the resin flow channels are arranged alternately along the extending direction from the beginning of the injection to the end of the injection. In some embodiments, the value of the gap width between adjacent hexagonal units ranges from 0.5mm to 3mm, and the ratio of the side length of each hexagonal unit to the gap width ranges from 1.0 to 3.0. In some embodiments, the surface of the hexagonal cells in contact with the fiber preform and/or the inner wall of the resin flow channel is provided with a micro-nano structured treatment layer. In some embodiments, the micro-nanostructure treatment layer comprises a micro-texture array disposed on a surface of the pattern layer that contacts the fiber preform. In some embodiments, the micro-texture array comprises nanoscale parallel trenches. In some embodiments, the extending direction of the nanoscale parallel grooves and the injecting direction form a preset included angle, the range of the preset included angle is 30-60 degrees, and the injecting direction is parallel to the extending direction from the injecting start end to the injecting end. In some embodiments, the micro-nanostructure treatment layer further comprises an array of micro-nano-scale bumps disposed on an inner wall of the resin flow channel. In some embodiments, the micro-nano bump array includes a plurality of pyramid-shaped micro-nano bumps, and the pyramid-shaped micro-nano bumps are continuously distributed on the groove wall and the groove bottom of the resin flow channel along the resin flow direction. In some embodiments, the micro-nano bump array includes a plurality of micro-nano bumps arranged in an array, the micro-nano bumps have a diameter ranging from 1 μm to 30 μm and a height ranging from 500nm to 50 μm, and the distance between adjacent bumps is 2 μm to 1mm. In some embodiments, the side lengths of the hexagonal units and the gap widths between adjacent hexagonal units gradually increase along the extending direction from the initial end of the injection to the final end of the injection; The increasing amplitude is determined according to the flow rate attenuation law in the resin filling process and the flow rate and flow resistance compensation relation. In som