Method for forming a filter medium

By applying sealing devices to the filter media web and welding them to form filter pleats, the manufacturing costs caused by adhesive bonding in the prior art are solved, enabling a simple, cost-effective, and reliable filter element manufacturing and environmentally friendly replacement solution.

CN117062658BActive Publication Date: 2026-07-07HYDAC FILTERTECHNIK GMBH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HYDAC FILTERTECHNIK GMBH
Filing Date
2022-02-25
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing technologies require adhesive bonding when manufacturing filter elements, which increases manufacturing costs and makes it difficult to achieve simple and cost-effective filter element manufacturing.

Method used

By applying sealing devices to the fluid-permeable media web, a robust bonding composite is formed, and it is pleated to form filter folds. The sealing devices are then connected to the side edges of the media web using welding technology, avoiding adhesive bonding and forming a sealed area.

Benefits of technology

It enables the manufacture of filter elements that are cost-effective and technically simple, ensures reliable sealing of the filter elements, and allows for replacement of the filter media without disassembling the end cap, making it environmentally friendly.

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    Figure CN117062658B_ABST
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Abstract

The invention relates to a method for forming a filter medium suitable for filtering a fluid for a filter element, comprising at least the following method steps: - applying at least one separate sealing means (16, 28) to a fluid-permeable medium web (14) in a predetermined direction (26), - producing a firm connection complex at least between the sealing means (16, 28) and the medium web (14), - pleating the connection complex to form a plurality of individual filter pleats, - producing a hollow body in such a way that two mutually adjacent, oppositely situated side edges of the medium web (14) extending transversely to the predetermined direction are connected to one another, in order to - obtain at least one sealing region on the medium web (14), the respective sealing means (16, 28) is arranged on the inside of the hollow body, a sealing for the respective filter pleat and an end-side sealing of the medium web (14) being achieved.
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