JPH026135U

JPH026135U -

Info

Publication number: JPH026135U
Application number: JP8482888U
Authority: JP
Priority date: 1988-06-27
Filing date: 1988-06-27
Publication date: 1990-01-16

Description

[Brief explanation of drawings]

第１図は本考案の前方押し出し成形用金型装置
の一実施例を示す縦断面図である。第２図は第１
図の前方押し出し成形用金型装置により製造され
た成形品を示す縦断面図である。第３図ないし第
５図は第１図の前方押し出し成形用金型装置によ
る前方押し出し成形を説明するための説明図であ
る。第６図および第７図は本考案の前方押し出し
成形用金型装置により製造された製品を示す縦断
面図である。第８図および第９図はそれぞれ本考
案の他の実施例を示す縦断面図である。第１０図
は従来の前方押し出し成形用金型装置の一例を示
す縦断面図である。第１１図は第１０図の前方押
し出し成形用金型装置により製造された成形品を
示す縦断面図である。第１２図は前方押し出し成
形加工時におけるストロークと成形荷重との関係
を示すグラフである。〔主要な部分の符号の説明〕、３１……ダイス
、３３……ダイ穴、３５……パンチ、３７……カ
ウンタパンチ、３９……ノツクアウトリング、４
１……支持突起、４７……素材。 FIG. 1 is a longitudinal sectional view showing an embodiment of the forward extrusion mold device of the present invention. Figure 2 is the first
FIG. 2 is a longitudinal sectional view showing a molded product manufactured by the front extrusion mold device shown in the figure. 3 to 5 are explanatory diagrams for explaining forward extrusion molding using the front extrusion mold device shown in FIG. 1. FIG. 6 and 7 are longitudinal sectional views showing a product manufactured by the forward extrusion mold apparatus of the present invention. FIGS. 8 and 9 are longitudinal sectional views showing other embodiments of the present invention, respectively. FIG. 10 is a longitudinal sectional view showing an example of a conventional front extrusion mold device. FIG. 11 is a longitudinal cross-sectional view showing a molded product manufactured by the front extrusion mold device of FIG. 10. FIG. 12 is a graph showing the relationship between stroke and molding load during forward extrusion molding. [Explanation of symbols of main parts], 31...Dice, 33...Die hole, 35...Punch, 37...Counter punch, 39...Knockout ring, 4
1...Support protrusion, 47...Material.

Claims

[Scope of utility model registration request]

A punch is placed on one side of the die hole formed in the die, and a counter punch that is inserted through the knockout ring is placed on the other side, and the punch is inserted into the die hole together with the knockout ring. Forward extrusion molding in which the material placed between the punch and the counter punch is extruded by plastically flowing into the space formed between the counter punch and the inner surface of the die hole. In the mold apparatus, the knockout ring is disposed movably relative to the counter punch and biased toward the punch, and further includes a knockout ring arranged at intervals in the axial direction on the outer periphery of the counter punch. A mold device for forward extrusion molding, characterized in that a support protrusion is formed that comes into contact with the inner circumferential surface of a knockout ring.