JPS6321126A - Bubble stabilizer in inflation film molding machine - Google Patents

Abstract

PURPOSE:To facilitate the mounting of filamentary bodies by a method wherein each filamentary body is inserted so as to lay across two through holes of a large ring and across two through holes of a small ring and disposed in tension between the large ring and the small ring. CONSTITUTION:A large number of filamentary bodies 19, each of which is made in an endless ring form by screwing both the ends of a short body 18 consisting of coiled spring into both the ends of a long stainless steel coiled spring 17, larger than the body 18, are prepared. Each filamentary body 19 is inserted so as to lay across two through holes 3 of a large ring 4 and across two through holes 7 of a small ring 8. A bubble stabilizer 21 is produced by disposing the filamentary bodies between the large ring 4 and the small ring 8 in tension under the state that each laid-across position is fastened at a position between each group of the through holes and both side parts 20 and 20' of the laid-across position pass the outsides of the outer peripheral edge surfaces of the large ring 4 and of the small ring 8 and that, in addition, the filamentary bodies slightly tilt in peripheral direction. The bubble stabilizer 21 is doubly disposed to the center of a die 22 in such a manner that the large ring 4 locates farther from the die than the small ring.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a bubble stabilizer in blown film forming iK.

[Prior Art] and [Problems to be Solved by the Invention] Conventionally, a bubble stabilizer using a filament made of a coil spring was disclosed in Japanese Patent Application No. 176765/1980, but this did not require the attachment of the filament. It needed to be made easier.

[Means for solving problems]

The present invention consists of a large ring and a small ring that are attached to a spindle of a die in a vertical arrangement and that have a large number of through holes around the outer periphery, and a large number of long coil springs that are arranged in an endless ring shape. It is structured like a striatum, and each striatum has two
It is inserted in such a way that it straddles one through hole and two through holes in the small wheel, and the straddling part is locked in the place between each set of through holes, and both sides of the straddling part are inserted in the large wheel and the small wheel. Provided is a bubble stabilizer for a blown film forming machine, characterized in that each filament is stretched between a large ring and a small ring by passing outside the outer peripheral edge surface, and the bubble stabilizer is thereby provided. This meets the above needs.

〔Example〕

The embodiment shown in the figure has a large ring (4) with a boss (2) around the periphery of the shaft hole (1), and a large number of through holes (3) that penetrate vertically on the periphery, and a shaft hole (5). A small ring (8) having a boss (6) around it and several through holes (7) penetrating vertically on the periphery is rotatable and sliding on a main shaft (9). These large, m (41, small a (8)
The boss (21+61) is fixed to the spindle (9) with a screw αno' so that it cannot rotate or slide, and the large wheel (4) and the small wheel (8) are fixed on the spindle (9). An outer tube αυ and an inner tube α2 are slidably attached to the space between the outer tube αυ and the inner tube α2.
The upper end of M is connected to the small ring (8) through screw α3 and boss avtc, and the lower end of inner pipe ua is pressed against the upper surface of large ring (4), and the lower end of outer pipe α is connected to the upper end of inner pipe α2. Screw α
A large wheel (4) and a small wheel (8) are formed by fastening with 9.
In addition to determining the distance between the long stainless steel coil spring αD, a large number of short bodies (1119) made of coil springs (1119) which are smaller in circumference than the coil spring αD are attached to both ends of the long stainless steel coil spring αD. striatum (19
, and each of these striatum σ1 is 2 in the large ring (4).
Two through holes (3) and two through holes (7) in the lesser ring (9)
The straddling part is inserted in a straddling state, and the straddling part is locked in a place between each set of through holes, and the go 1 on both sides of the straddling part is on the outside of the outer peripheral edge surface of the large ring (4) and the small ring (8). A bubble stabilizer Qυ is constructed by stretching each filament (19) between the large ring (4) and the small ring (8) in a tensioned state slightly inclined in the circumferential direction. body C
υ is superimposed on the center of the die with the large ring (4) facing away from the same die (■).

In the above embodiment, the lower end of the molten tubular body of the olefin-based resin (2 extruded molten tubular bodies c! 4) is sandwiched between the vinyl rolls (not shown) K and the molten tubular body □□□ A method for forming a blown film by blowing air into the film through the air outlet (C) to inflate it to a predetermined size while continuously winding the film after it has passed through the pinch rolls. be.

Furthermore, during the above-mentioned molding, the inner surface of the part ■ on the verge of transitioning to the funnel-shaped enlarged part @ in the bubble (G) is covered with a bubble stabilizer Q.
By contacting the filament a9 of υ in a soft state, the molten linear polymer resin, which has almost reached the above-mentioned point, is slid diagonally and kneaded, and by this kneading, the linear high The horizontal and vertical orientations of the molecules are better balanced, and the thicker and thinner parts are made evenly thick by sliding in the same diagonal direction. Furthermore, as shown in the drawing, when the air sent through the air outlet (c) flows into the expanded part of the bubble via the striated body (19), The air ring (c) suppresses the high temperature inside the molten tubular body (c)
The cooling effect is assisted from the inside.
[Function] and [Effects of the Invention] The present invention provides a large ring and a small ring that are attached to support the die in an upper and lower arrangement and that have a large number of through holes around their outer periphery;
A long coil spring is composed of a large number of endless ring-shaped filaments, each of which straddles two through holes in the large ring and two through holes in the small ring. and the straddling part is locked in a place between each set of through holes, and both sides of the straddling part are passed outside the outer peripheral surface of the large ring and the small ring, so that each filament body is connected to the large ring and the small ring. Since the filament is stretched under tension between Kotoka de e
It has excellent effects.

[Brief explanation of the drawing]

The figures show an embodiment of the bubble stabilizer in the blown film forming machine of the present invention, in which Fig. 1 is an overall front view, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3
The figure is an enlarged perspective view of the main part, and FIG. 4 is an exploded view of the joint at both ends of the filament. (1)--Shaft hole, (2)...Boss, (3)...Through hole, (4)...Large ring, (5)...Shaft hole, (6)...
Boss, (7)...Through hole, (8)...Small ring, (9)・
・・Support shaft, αOα1′・・Bis, ■・・Outer tube, C2
...Inner pipe, (13...screw, Q4)...Boss, C
9...screw, αη...coil spring, bet...short body, (19...striated body, circle ■'...both sides, (2I)
...bubble stabilizer, ■...dice, container...outlet, C24)...melting tubular body, wire...bubble, punishment...
・Enlarged part, (branch)...just before it, □□□...cooling nearing. Patent applicant: Super Bag Co., Ltd.

Claims (1)

[Claims] A large ring and a small ring are attached to a spindle of the die in a vertical arrangement and have a large number of through holes around the outer periphery, and a large number of linear bodies each having a long coil spring shaped into an endless ring. Each of these filamentary bodies is inserted in a straddling state through two through holes in the large ring and two through holes in the small ring, and the straddling point is located between each set of holes. A blown film characterized in that both sides of the locked and straddling portions are passed outside the outer peripheral surfaces of the large ring and the small ring so that each filament is stretched between the large ring and the small ring in a tensioned state. Bubble stabilizer in molding machine.