JPH04520U

JPH04520U -

Info

Publication number: JPH04520U
Application number: JP1990039823U
Authority: JP
Priority date: 1990-04-14
Filing date: 1990-04-14
Publication date: 1992-01-06

Description

[Brief explanation of the drawing]

第１図は本考案に係る押出機のヘツド部の一実
施例を示した縦断面図、第２図〜第３図は上記第
１図の押出機のヘツド部の動作状態を示した部分
縦断面図、第４図は上記第１図の押出機のヘツド
部を適用した２段押出方式の一例を示した概略説
明図である。図中、１……ダイ、２……固定ニツプル、３…
…可動中空ニツプル、４……ニードル、８……弾
性調整部材、９……弾性体、Ｌ_１……第１通路、
Ｌ_２……第２通路、Ｖ……開閉弁、Ｐ……滞留受
圧部。 FIG. 1 is a longitudinal sectional view showing an embodiment of the head section of an extruder according to the present invention, and FIGS. 2 and 3 are partial longitudinal sectional views showing the operating state of the head section of the extruder shown in FIG. 1 above. The plan view and FIG. 4 are schematic explanatory diagrams showing an example of a two-stage extrusion system to which the head section of the extruder shown in FIG. 1 is applied. In the figure, 1...die, 2...fixed nipple, 3...
... Movable hollow nipple, 4 ... Needle, 8 ... Elastic adjustment member, 9 ... Elastic body, L ₁ ... First passage,
_L2 ...second passage, V...opening/closing valve, P...retention pressure receiving section.

Claims

[Scope of utility model registration request]

A die having a first passage therein, a fixed nipple inserted and fixed inside the die and whose tip protrudes toward the exit side of the first passage in the die, and an internal hollow part in the axial direction of the fixed nipple. A movable hollow nipple that is slidably inserted and has a second passage in the internal axial direction, and an on-off valve formed by moving a needle fixed to the distal end of the movable hollow nipple from the distal end of the internal hollow part of the fixed nipple. an elastic body that always elastically biases the movable hollow nipple in the direction of its distal end; and a retention pressure receiving part of a second passage formed between the outer periphery of the distal end of the movable hollow nipple and the internal hollow part of the fixed nipple; When the material is supplied to the second passage, the on-off valve is automatically opened by the pressure received by the material in the retention pressure receiving part, and the material in the second passage is mixed into the material in the first passage. The head of the extruder.