Low-cost mass production technological process for preparing large-thickness composite material and forming mold of large-thickness composite material

Abstract

The invention discloses a low-cost mass production technological process for preparing a large-thickness composite material and a forming mold of the large-thickness composite material. The forming mold comprises an outer mold, an inner mold, a heating pipeline, a bolt, an inner mold blocking block and an ejection device; The low-cost mass production technological process comprises the steps of A,composite material blank paving, B, composite material blank preheating, C, mold pressing curing, D, demolding and E, inner mold lower mold recycling. In conclusion, a detachable inner mold form is adopted, a plurality of inner mold lower molds can be configured at the same time, different inner molds can be designed and manufactured for use, the takt time of mold pressing process mass productioncan be effectively matched, the production efficiency is improved, and the production cost is reduced; preparation of composite materials of different structures is achieved, and the design and manufacturing cost of an extra mold is reduced; a rapid blank preheating mode is adopted, so that uniform heating of the large-thickness composite material is ensured, and the forming quality and the mechanical property of the composite material are ensured; and application of an internal releasing agent is omitted, and the raw material cost is reduced.

Description

technical field [0001] The invention relates to the field of material manufacturing, in particular to a low-cost mass production process for preparing large-thickness composite materials and a molding die thereof. Background technique [0002] The molding process is widely used in the molding of fiber composite materials. Compared with the autoclave process, the molding process has low cost, high efficiency and controllable quality. However, for large-thick composite materials, such as composite leaf springs, composite bulletproof plates, etc., whose thickness exceeds 10mm, or even 50mm or thicker, the traditional molding process is used to heat the composite material in the mold cavity by using the upper and lower molds. , on the one hand, the heat conduction speed is slow, the molding time is long, and the efficiency is low, which is difficult to meet the needs of mass production. The central area of ​​the material is post-cured to form internal stress, which affects the ...

AI Technical Summary

Problems solved by technology

At present, there is no research to prove that the use of internal release agent has a significant impact on the performance of composite materials

However, for large-thickness composite materials, whether the internal release agent has completely moved to the surface during the curing process has been perplexing the industry. The impact of the residual internal release agent on the performance of large-thickness composite materials has always been a heart problem for industry insiders.

[0004] In addition, for different composite material parts, it is necessary to redesign and manufacture the corresponding molds, which requires a long cycle and high investment.

[0005] In view of the existing large-thickness composite material molding process proposed above, especially the quality, efficiency and cost problems existing in mass production of composite materials, this program proposes a low-cost mass production process for preparing large-thickness composite materials and its forming mold

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