JPS59118521U - Mold - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、従来の２プレート金型で射出成形されたゲー
トカット前の永久磁石の見取図。第２図は、第１図の永
久磁石を製造するための従来の方法による金型の断面図
。黒い部分に永久磁石が射出される。又、白色部と斜線
部は磁気回路を示す。 第３図ａ、　　ｂは、第２図の金型が開いた時の断面図
。第４図は、本考案による、３プレート金型で、第１図
の製品部分と同じものを作った場合の断面図。第５図は
、第４図の金型が約半分間いた状態での断面図。第６図
は、第４図の金型が全開した状態での断面図。Figure 1 is a sketch of a permanent magnet before gate cutting, which was injection molded using a conventional two-plate mold. FIG. 2 is a cross-sectional view of a mold according to a conventional method for manufacturing the permanent magnet of FIG. A permanent magnet is injected into the black part. Moreover, the white part and the shaded part indicate the magnetic circuit. Figures 3a and 3b are cross-sectional views of the mold shown in Figure 2 when it is opened. FIG. 4 is a cross-sectional view of the same product part as shown in FIG. 1 made using a three-plate mold according to the present invention. FIG. 5 is a cross-sectional view of the mold shown in FIG. 4 in a state in which it is about halfway in place. FIG. 6 is a sectional view of the mold shown in FIG. 4 in a fully opened state.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 射出成形法により製造される永久磁石用の金型において
、該金型構造が、磁気回路を有する３プレ一ト方式であ
ることを特徴とする金型。A mold for a permanent magnet manufactured by an injection molding method, characterized in that the mold structure is a three-plate type having a magnetic circuit.