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PMI foam for the production of artificial pores

IP.com Disclosure Number: IPCOM000224450D
Publication Date: 2012-Dec-20
Document File: 2 page(s) / 59K

Publishing Venue

The IP.com Prior Art Database

Abstract

Non-destructive testing (NDT) of the produced (and cured) components is an important aspect of industrial production of fiber-reinforced components. During NDT, various component characteristics are examined. The detection of trapped air in the fiber composite, the so-called pores, are a key issue in NDT. When developing new components with new interior setups, materials and geometries the question always arises as to whether potential pores and pore formations within the component can be reliably detected and evaluated by means of existing or new NDT. A reliable method for introducing pores into the component in a defined manner is required in order to validate NDT technologies in development. “In a defined manner” means that position and size of the nonconformity / pore are known before NDT technology is tested on the component for suitability (so-called quality samples). Such quality samples may thus be used for demonstrating suitability of an NDT technology as well as for calibration. The introduction of outgassing/expanding substances into the compound before curing is a current procedure. The disadvantage of this method is that exact positioning and adjustment of the pore size by means of the substance to be introduced, which is powdery in most cases, proves to be problematic. When using an infusion procedure, there is also the risk of washing away the powder with the resin flow.

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1. ABSTRACT

Non-destructive testing (NDT) of the produced (and cured) components is an important aspect of industrial production of fiber-reinforced components. During NDT, various component characteristics are examined. The detection of trapped air in the fiber composite, the so-called pores, are a key issue in NDT. When developing new components with new interior setups, materials and geometries the question always arises as to whether potential pores and pore formations within the component can be reliably detected and evaluated by means of existing or new NDT. A reliable method for introducing pores into the component in a defined manner is required in order to validate NDT technologies in development. "In a defined manner" means that position and size of the nonconformity / pore are known before NDT technology is tested on the component for suitability (so-called quality samples). Such quality samples may thus be used for demonstrating suitability of an NDT technology as well as for calibration. The introduction of outgassing/expanding substances into the compound before curing is a current procedure. The disadvantage of this method is that exact positioning and adjustment of
the pore size by means of the substance to be introduced, which is powdery in most cases, proves to be problematic. When using an infusion procedure, there is also the risk of washing away the powder with the resin flow.


2. DISCLOSURE

PMI foam is a closed-cell foam. Its cells are filled...