FILTER AND MANUFACTURING METHOD THEREOF

• Main Authors: TAKENAKA HIROYUKI, HIRAO KEITA
• Format: Patent
• Language: English; Japanese
• Published: 14.11.2019
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

To provide a thin-walled metal filter member having a small filter hole and a resin molding part, and a filter part free from wrinkles and sagging and excellent in cleanability, and a manufacturing method thereof.SOLUTION: A filter member 2a having a filter part 23 in which a large number of filter holes are formed by etching, and in which a resin through hole 25c is formed in a peripheral part of the filter part 23, is set in a primary molded part 1a that occupies most of a resin molded part and has been previously molded with a receiving surface 13 that receives the peripheral edge of the filter part 23. In this state, the primary molding part 1a and the filter member 2a are inserted into a mold, and a secondary molding part 3a occupying a remainder of the resin molding part is injected to mold the resin molded part. This prevents wrinkles and sagging of the filter member caused by thermal shrinkage during molding of the resin molded part.SELECTED DRAWING: Figure 3 【課題】薄肉で、小さなフィルタ孔を備えた金属製フィルタ部材と、樹脂成形部とからなり、フィルタ部分にしわやたるみがなく、清掃性に優れたフィルタおよびその製造方法を提供する。【解決手段】多数のフィルタ孔がエッチング加工によって形成されたフィルタ部２３を有し、このフィルタ部２３の周縁部に樹脂通孔２５ｃが穿設されたフィルタ部材２ａを、樹脂成形部の大部分を占め、フィルタ部２３の周縁部を受ける受面１３を有する先に成形された一次成形部１ａにセットした状態で一次成形部１ａとフィルタ部材２ａを金型内にインサート状態にして、樹脂成形部の残部を占める二次成形部３ａを射出して、樹脂成形部を成形することで、樹脂成形部の成形時の熱収縮によって生じるフィルタ部材のしわやたるみを防止するようにした。【選択図】 図３