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Flexible curved-surface foaming structure and paving and covering method thereof

A technology of foam structure and curved surface structure, which is applied to other household appliances, household appliances, household components, etc., can solve the problems of high labor cost, time-consuming and laborious, low work efficiency, etc., to improve stability and adaptability, and reduce production costs. , the effect of improving work efficiency

Active Publication Date: 2020-04-28
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, drape molding of curved foam sandwich structures is usually time-consuming and labor-intensive
The existing process usually has low working efficiency, high cost of foam machine, poor internal quality control, high labor cost, and high failure rate; in addition, especially for large structures, overall curved surface foam covering is basically Unattainable

Method used

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  • Flexible curved-surface foaming structure and paving and covering method thereof
  • Flexible curved-surface foaming structure and paving and covering method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] ①Adopt PMI foam core material (polymethacrylimide foam core material) to machine add planar foam structure.

[0048] ② Carry out grid processing on the planar foam structure obtained in step ①, and determine the minimum size of the unit. The minimum size is preferably a single piece of foam placed on a curved surface with high stability, and the planar foam structure is transformed into a multi-unit by cutting Block grid cell structure.

[0049] ③ bonding the multi-grid unit structure obtained in step ② to the flexible fabric structure (plain carbon cloth) through glue to obtain a flexible foam structure with bonding conditions.

[0050] 4. the flexible foam structure obtained in step 3. is covered on the curved surface structure (spherical curved surface structure) of the mould, by utilizing the self flexibility of the flexible fabric structure and the flexibility of the segmented foam structure to obtain a flexible foam curved surface structure; Among them, the flexi...

Embodiment 2

[0055] Using the same covering method and molding method as in Example 1, obtain 100 foam sandwich structures with spherical curved surfaces in Example 1, and carry out product qualification for these 100 foam sandwich structure products with spherical curved surfaces in this embodiment The qualified rate of this batch of products reached 100%.

Embodiment 3

[0057] Using the traditional overall curved surface foam sandwich structure overlay molding method to obtain 100 foam sandwich structures with the same shape and characteristics as in Example 1, these 100 foam sandwich structures with spherical surfaces in this embodiment are carried out. Product pass rate inspection, the pass rate of this batch of products is 80%.

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Abstract

The invention relates to a flexible curved-surface foaming structure and a paving and covering method thereof. The paving and covering method comprises the steps that a planar foaming structure is provided; the planar foaming structure is subjected to gridding processing to obtain a multi-block grid unit structure; the multi-block grid unit structure is bonded with a flexible fabric structure to obtain a flexible foaming structure; the flexible foaming structure is paved on a curved-surface structure in a covering mode to obtain a flexible foaming curved-surface structure; in the process of paving and covering, the flexible foaming structure spreads out due to paving and covering of curved surfaces, so that a gap is formed, and the gap is repaired through adhesive films, prepreg and / or reinforcing materials; and fabrics and / or the prepreg are paved on the flexible foaming curved-surface structure in a covering mode to obtain the flexible curved-surface foaming structure. The method solves the problems of low-cost machining, paving and covering and molding of complex surface foaming sandwich structures, complex surfaces are converted into simple planes, and block overall paving andcovering are converted into unit paving and covering; and compared with traditional curved-surface foaming sandwich structure molding, the flexible curved-surface foaming structure has the outstandingadvantages such as simple technological process and low-cost manufacturing.

Description

technical field [0001] The invention belongs to the technical field of cladding and forming of composite materials, and in particular relates to a flexible curved surface foam structure and a cladding method thereof. Background technique [0002] Foam sandwich structure is a typical structural form in aerospace structures. At present, the drape molding of curved foam sandwich structures is usually time-consuming and labor-intensive. The existing process usually has low work efficiency, high cost of foam machine, poor internal quality control, high labor cost, and high failure rate; in addition, especially for large structures, overall curved surface foam covering is basically unattainable. [0003] In view of the above problems, it is very necessary to provide a new flexible curved foam structure covering method and the flexible curved foam structure obtained by the covering molding. Contents of the invention [0004] In order to solve the technical problems in the clad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/30B29C70/54B29L31/30
CPCB29C70/30B29C70/54B29L2031/3076
Inventor 田智立张涛陈磊井文奇魏洪峰李卓达夏雅男杜逸飞刘雷波张昊
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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