Filter element and manufacturing method thereof

Abstract

The invention provides a filter element and a manufacturing method thereof. The manufacturing method of this filter element can reduce the pressure loss of a filter part, and can improve the intensity|strength of a flange part. The manufacturing method of the filter element comprises the following steps: a placing step, in which, the first non-woven fabric (7) that has been wrinkled and folded is disposed in the molding die (5), and the first non-woven fabric is combined with the first non-woven fabric The second nonwoven fabric (8) in the form of a sheet is arranged in such a way that at least the end side in the ridge line direction (P) of the pleats overlaps at least in the outer peripheral portion (11); and a forming step, in which , the first non-woven fabric and the second non-woven fabric are heated and compressed by a molding die to form a filter part (2) inside the outer peripheral portion of the first non-woven fabric, and the outer peripheral portion of the first non-woven fabric and the second non-woven fabric are 2. The nonwoven fabric is integrated to form the flange portion (3).

Description

technical field [0001] The present invention relates to a filter element and a manufacturing method thereof, and more specifically relates to a filter element made of non-woven fabric including a filter portion formed with pleats and a flange portion extending outward from the outer peripheral side of the bottom of the filter portion. Manufacturing method. Background technique [0002] As a filter in the past, generally known such as such non-woven air filter 101: as Figure 11 As shown in (a), it includes a filter part 102 formed with pleats and a flange part 103 extending outward from the outer peripheral side of the bottom of the filter part 102 (for example, refer to Patent Document 1: Japanese Patent Application Laid-Open No. 2016-211081). In this patent document 1, for example, such a production method is described: Figure 12 As shown, a non-woven fabric 107 that has undergone crease folding processing is disposed in a molding die 105 (refer to Figure 11 (b)), the n...

AI Technical Summary

Problems solved by technology

In addition, in the countermeasure of using the nonwoven fabric 107 with a high basis weight, the pressure loss of the filter part 102 increases

In addition, in the countermeasures of inserting and molding the resin frame into the flange portion 103, the cost increases and there is no degree of freedom in shape (for example, assembling in a curved manner, etc.)

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