A flexible curved foam structure and its covering method

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 labor-intensive work, and low work efficiency, so as to improve stability and adaptability, and simplify the process flow , the effect of reducing production costs

Active Publication Date: 2022-03-15
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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  • A flexible curved foam structure and its covering method
  • A flexible curved foam structure and its covering method

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 foam structure and a covering method thereof. The method is as follows: providing a planar foam structure; performing grid processing on the planar foam structure to obtain a multi-block grid unit structure; bonding the multi-block grid unit structure to a flexible fabric structure to obtain a flexible foam structure; The flexible foam structure is laid on the curved surface structure to obtain a flexible foam surface structure; during the laying process, the flexible foam structure is spread by the curved surface to form gaps, and the gaps are formed by adhesive films, prepregs and / or reinforcement materials. Repair; laying fabric and / or prepreg on the flexible foam surface structure to obtain a flexible surface foam structure. The method of the present invention solves the low-cost machining, covering and molding of the complex profile foam sandwich structure, transforms the complex profile into a simple plane, and converts the bulk overall covering into unit covering; compared with the traditional curved foam sandwich Structural molding has outstanding advantages such as process simplification and low manufacturing cost.

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 Patents(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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