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PROBLEM TO BE SOLVED: To suppress occurrence of a weld line in the periphery of a through-hole of a resin mold part (in a deep part with respect to the through-hole, as viewed from a resin injection position).SOLUTION: In a resin mold part 60, a through-hole 61 is formed, and a rib 62 is formed, whi...

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Bibliographic Details
Main Authors ITO TOMOSHI, MIYAUCHI HIROYUKI, ONO HIROSHI, KAMIKAWA GIICHI
Format Patent
LanguageEnglish
Japanese
Published 16.03.2017
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Summary:PROBLEM TO BE SOLVED: To suppress occurrence of a weld line in the periphery of a through-hole of a resin mold part (in a deep part with respect to the through-hole, as viewed from a resin injection position).SOLUTION: In a resin mold part 60, a through-hole 61 is formed, and a rib 62 is formed, which continuously extends to the deep part with respect to the through-hole 61 from one side of both sides with respect to the through-hole 61 as viewed from an injection position. Therefore, when the resin mold part 60 is formed, the flow rate of resin increases in a portion corresponding to the rib 62. That is, the flow rate increases when the resin injected from an injection hole flows into the deep part (the central and lower side part in FIG. 1) with respect to a pressed portion (through-hole 61) from one side (the central and left side part in FIG. 1) of both sides with respect to the pressed portion (through-hole 61). This makes it possible to suppress occurrence of a weld line in the deep part of the resin mold part 60 with respect to the through-hole 61 as viewed from the injection position.SELECTED DRAWING: Figure 1 【課題】樹脂モールド部の貫通孔周辺(樹脂の注入位置から見て貫通孔に対する奥部)にウェルドラインが生じるのを抑制する。【解決手段】樹脂モールド部60には、貫通孔61が形成されると共に、注入位置から見て貫通孔61に対する両側部のうちの一方から貫通孔61に対する奥部まで連続して延びるリブ62が形成されている。したがって、樹脂モールド部60を形成する際に、リブ62に相当する部分での樹脂の流速が大きくなる、即ち、注入孔から注入された樹脂が被押圧部分(貫通孔61)に対する両側部の一方(図1中左側部)から被押圧部分(貫通孔61)に対する奥部(図1中下側部)に流れる際の流速が大きくなる。これにより、樹脂モールド部60の、注入位置から見て貫通孔61に対する奥部にウェルドラインが生じるのを抑制することができる。【選択図】図1
Bibliography:Application Number: JP20150175618