JPS5872014U

JPS5872014U - A mold for forming a hollow cylinder made of plastic with an undercut on the inner circumferential wall.

Info

Publication number: JPS5872014U
Application number: JP16785481U
Authority: JP
Inventors: 守屋　正一; 正之山田
Original assignee: Aoyama Seisakusho Co Ltd; Gifu Plastic Industry Co Ltd
Current assignee: Aoyama Seisakusho Co Ltd; Gifu Plastic Industry Co Ltd
Priority date: 1981-11-11
Filing date: 1981-11-11
Publication date: 1983-05-16
Also published as: JPH0140654Y2

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

[Brief explanation of drawings]

第１図は、固定型１と移動型２とで形成される中空部３
内に、円柱状中子４および截頭円錐状中子８の双方を挿
入した状態の正面断面図、第２図は、第１図の主要部の
拡大図、−第３図イは、第１図のＸ−Ｘ線拡大断面図、
同口は第８図のＸ′−Ｘ′線拡大断面図、第４図イは、
第１図のＹ−Ｙ線拡大断面図、同図口は、第８図のｙ’
−ｙ’線拡大断面図、第５図は、第１のスライド片１９
の斜視図、第６図は第２のスライド片２０の斜視図、第
７図は、第２のスライド片２０のＴ字突条２８と、スラ
イド片取付は環１５のＴ溝１８との嵌合状態を示す平面
図、第８図は、中空部３内から截頭円錐状中子８のみを
抜き去った状態の正面断面図、第９図は、中空部３内か
らすべての中子を抜き去った状態の正面断面随である。（主要部分の符号の説明）、１・・・・・・固定型、之
・・・・・・移動型、３・・・・・・中空部、４・・・
・・・円柱状中子、６・・・・・・円柱状中子の軸、８
・・・・・・截頭円錐状中子、１１・・・・・・第１の
案内溝、１２・・・・・・第２の案内溝、１５・・・・
・・スライド片取付は環、１８・・・・・・Ｔ溝、１９
・・・・・・第１のスライド片、２０′・・・・・・第
２のスライド片、２３．　２４−−−−−−スライド板
、２７．２８・・・・・・Ｔ学究条、Ａ・・・・・・プ
ラスチック製中空円筒体、Ａ′・・・・・・プラスチッ
ク製中空円筒体の円周部、Ａ“・・・・・・プラスチッ
ク製中空円筒体のアンダーカット部。ＲFIG. 1 shows a hollow part 3 formed by a fixed mold 1 and a movable mold 2.
Fig. 2 is an enlarged view of the main part of Fig. 1; An enlarged sectional view taken along line X-X in Figure 1,
The opening is an enlarged sectional view taken along the line X'-X' in Figure 8, and Figure 4A is
An enlarged sectional view taken along Y-Y line in Figure 1, the opening in the same figure is y' in Figure 8.
-Y' line enlarged sectional view, FIG. 5 shows the first slide piece 19
FIG. 6 is a perspective view of the second slide piece 20, and FIG. FIG. 8 is a front sectional view showing only the truncated conical core 8 removed from the hollow part 3, and FIG. 9 is a plan view showing the assembled state. FIG. This is a front cross-section of the removed state. (Explanation of symbols of main parts), 1...Fixed type,...Movable type, 3...Hollow part, 4...
... Cylindrical core, 6 ... Axis of cylindrical core, 8
...Frunctuated conical core, 11...First guide groove, 12...Second guide groove, 15...
...Slide piece installation is ring, 18...T groove, 19
...First slide piece, 20'... Second slide piece, 23. 24---Slide plate, 27.28...T academic article, A...Plastic hollow cylindrical body, A'...Plastic hollow cylindrical body Circumferential part, A"...Undercut part of plastic hollow cylinder. R

Claims

[Scope of utility model registration request]

A shaft is connected to a cylindrical core for molding the cylindrical part of a plastic hollow cylinder having an undercut on the inner peripheral wall, and a truncated conical core for molding the undercut part is connected to the cylindrical core. A plurality of first and second guide grooves having trapezoidal cross-sections with different slopes are alternately provided on the outer circumferential surface of the conical core along the generating line, and the circular core is slidably fitted onto the shaft of the core. To mount the slide piece, which is fixed by aligning the shaft center with the predetermined position of the columnar core shaft, multiple T grooves are provided in the ring in the radial direction.
The first and second slides have a protrusion for forming an undercut on the outer peripheral surface of the distal end, a slide plate with a cross-sectional pattern fixed on the inner peripheral surface of the proximal end, and a T-study strip on the proximal end surface. a first slide plate formed on the frusto-conical core, and each slide plate of the first and second slide pieces is
At the same time, the T-shaped groove of each slide piece is slidably fitted into the T-groove of the ring, and when the fixed mold and movable mold are closed, A plastic hollow cylindrical molding mold having an undercut in an inner circumferential wall, the mold being configured such that the cylindrical core and the truncated conical core can move in and out independently of each other in the hollow part to be formed.