Flexible filter element with plastic frame formed thereon by injection molding

A technology of filter element and injection molding technology, which is applied in the field of filter elements, can solve the problems of filter elements such as leaking, thin area breaking, and unsuitable hinges, etc., and achieve the goal of improving particle filter elements, good adhesion, and realizing flexibility and bendability Effect

Active Publication Date: 2016-10-12
CARL FREUDENBERG KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Filter media have become increasingly important due to their ability to remove unwanted particles from fluids passing through them effectively while maintaining their original size during use. However, current filters may lose some amount of filtration efficiency over time because they get damaged easily after repeated insertions. To solve this problem, there were proposals involving making it flexible but still able to withstand high pressure fluid flow rates (approaching 2000 bar). Additionally, adding an elastomeric layer on top could improve durability against abrasion resistance. Overall these technical features help prevent leaks caused by cracks and wear out components within the filtering device itself.

Problems solved by technology

Technologies described include crimpable filters used in electronic devices such as filters for clean rooms (FFE) and liquid crystal displays. These filters require high flexibility while maintaining their functionality even after being bent repeatedly through multiple cycles. Additionally, these filters may experience leakage issues if left inside them permanently. To solve these challengings, membranous plugs containing a frame were developed where the frame itself forms a tightly fitting ring surrounding the filtration media.

Method used

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  • Flexible filter element with plastic frame formed thereon by injection molding
  • Flexible filter element with plastic frame formed thereon by injection molding
  • Flexible filter element with plastic frame formed thereon by injection molding

Examples

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Embodiment Construction

[0045] figure 1 A prior art frame element 1' is shown, which has a gap 2' and a thin area 3'.

[0046] figure 2 A frame element 1 is shown in which some frame regions 2 a are made of a harder plastic and some frame regions 2 are made of a softer plastic.

[0047] image 3 A filter element for insertion into a filter housing is shown, which comprises a filter medium 9 with a rim 10 which is connected to at least one injection-molded frame element 1 .

[0048] The frame element 1 is made of plastics of different hardness alternately in at least one direction of extension 6 in such a way that the filter element can be at least partially flexibly bent when the filter medium 9 and the frame element 1 are deformed.

[0049] Frame regions 2 made of softer plastic are attached to one or more frame regions 2 a of harder plastic of the frame element 1 , wherein the frame regions 2 of softer plastic form a defined curvature parts.

[0050] Plastics of different hardness can be configu

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PUM

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Abstract

A filter element to be inserted into a filter housing, has a filter medium (9) with a rim (10), wherein the rim (10) is connected to an injection-molded frame (11) or at least one injection-molded frame element (1), providing a flexibly bendable filter element using a frame made of plastic attached by injection molding, wherein the frame (11) or at least one frame element (1) is made of plastics of different hardnesses in alternation in at least one extension direction (6), such that the filter element can be bent flexibly at least in part by deforming the filter medium (9) and the frame (11) or frame element (1).

Description

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Claims

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Application Information

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Owner CARL FREUDENBERG KG
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