JPS6036123A - Fast molding of thermoplastic resin film and high-speed molding machine with t-die - Google Patents

Abstract

PURPOSE:To achieve a fast molding of a film with an even thickness and a desired transparency as well as gloss by moving a melt film to an air knife from a T-die under a pressure. CONSTITUTION:A cover body 24 stretchable according to the changes in the interval between a T-die 20 and an air knife 22 is spread between a slit 20a of the T die 20 and a blow-off port 23 of the air knife 22 and is made of a soft synthetic resin in a shape of bellows. A melt film B is made to drop on the circumference of a cooling roll 21 in such a manner as to be drawn to the cover body 24 according to the relative speed difference between the rotational speed of the cooling roll 21 and the extrusion speed of the melt film from the T die 20. Then, passing through the cover body 24, the melt film B is put tight on the circumference of the cooling roll 21 rotating while being cooled under the pressure of a cool air blown from the blow-off port 23 in front thereof of the air knife 22 thereby accomplishing a fast molding of a film F with a specified thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION [Shuto Field] The present invention relates to a method for high-speed molding of a thermal HJNi synthetic side fat film using a T-die, and a process for high-speed molding.

[Promotional technique south]

As the Den gland Sho fast molding method of this story and the bandit battle, T-die 1
The bath melting material B stretched and molded from
The rotating cooling roll 11 provided in close proximity is made to be densely layered by the NJ input pressure blown out from the outlet 16 of the -slope or multistage F-knife 12 (also &! 12a), and the lv gradient J
As a result, J') r rectangular thick film L' is formed as a molded film, or exists as a molded film or as a tipped rain (Fig. 2.1, spear 2).
(See Figure 1) 0 Historically, the purpose of improving the structure of the F-knife 12 was to equalize the thickness of the Noboru film.
The SL continuous variant method and molding method shown in each electromagnetic plane of Machikosho b6-20549 are revised.

However, in the above-mentioned Confucian Fu Mi Pei Yu, T-die 1. υ
The 174 RB5+ material extruded from the cooling roll 11
It is pulled down by the simultaneous rotation of
Between die 10 and F knife 12Vc (usually 25 to 7
When forming a thick film, the temperature of the outside air is in an unbalanced state at 0 temperature), and when forming a thick film, the bath draw rate (circumferential speed of cooling roll / extrusion rate of T-die 1o) becomes smaller, and
7Fj Peng N15 between die 10 and F knife 12
While the tension applied to o becomes smaller, when the terrain of the natural history film is present, this tension increases, and the air is drawn at +L4 speed, drawing sweat from the outside air between the cooling roll 11 and the bathing roller. Slit 1υa of T-die 10
Is it common R1Rm130 mainly from F knife 12? / Mowing around the V-roll 11 ℃ small vibration? ! Q due to the wind pressure from F-Knife 12
The quick contact (cloth) between the cooling roll 11 and the bath BQMo is uniform throughout the whole set, but the change in direction does not proceed uniformly and the bath WR
Wrinkles and sagging occurred on the surface of the product, and the film was not easily molded. According to 7. The gap between the film and film has become larger, and the number of ear slits has increased, pushing up the cost of mounting the film.

[eye fishing]

This invention improves the drawbacks of the conventional technology, and places the bath PHg from the slit of the T-die to the F-knife under pressure in a manner similar to that of a koshiki, and the thickness and width of the bath melt in this section are the same. Remove the 1bll S from the edge, extrude the bath fusion group from the T die onto the circumferential surface of the N-roll in the female-built state, and lower it.
A method for high-speed forming of a film of uniform thickness, high visibility, and gloss by moving the bath melt in the circumferential direction of the P-roll to the other side of the outlet of the F-knife almost without being shielded from the outside air, and The main objective of IEJ is to provide such equipment.

〔composition〕

In order to achieve the above-mentioned purpose, the present invention extrudes a hot plastic composite YR fat bath through a slit of a T-die to form a bath melt film, and when applying mW to the circumferential surface of a cooling roll during 1I21 rolling, one step The thermoplastic synthetic resin η1 is made to form a film with a constant thickness of 15r by densely layering this bath melt on the circumferential surface of the cooling roll and cooling it by the cold nozzle pressure blown out from the outlet of the multi-stage F-knife. In the high-speed molding method for group 7 fat γtI, a bath/a extends from the slit of T-die No. 111 provided very close to the circumferential surface of the cooling roller to the outlet of the F-knife.
! The pressure on the II group is cut off from the outside air, and the T die is transferred from the T die to the F knife under pressure! Record R4-
This is a heavy-speed forming method for hot plastic molding 11-layer film in which the group is moved, which is similar to TRF.

Another button, January, is a T-die slit extrusion molded thermoplastic, YG fusion of side force, and ni.
A one-stage to a multi-stage F-knife outlet is used to discharge blood around the rotating anti-slip roll installed near the J-T die. Is it densely layered due to poor wind pressure? Cool the film to a constant thickness.In an instant molding machine with a T-die for the heat-resistant side fat film, press the molten layer upward between the slits of the vinyl die and the first exit of the F-knife. The surrounding body, which is disconnected from the outside air, is the front tie T.
This is a high-speed molding machine for thermoplastic synthetic bottle-inverting film, which is characterized by being expandable and contractible to follow changes in the distance between the die and the F-knife. .

Next, Figures 6 to 5 show representative embodiments of the optical device of the present invention.
I will explain based on the diagram.

In Figure 6, 20 is a T-die, and this T-die 20
82 near I? A cooling roll 21 is installed on the machine frame around the turning port with the phase line horizontal.

(b) A part of the F-knife 22 that brings the bath melting group 3 parts drawn out from the slit 2tJa of the T-die 2u into close contact with the circumferential direction of the cooling roll 21 in the duck, or the sulin of the T-die 20) 2L1
1 foot dimension (20
~7U familiar) Hl, that's it? ' is arranged with the wind outlet 26 facing toward the cooling row/L-21jbJ.

NiI mt Between the slit 2Ua of the T-die 20 and the air outlet 260 of the F-knife 22, the T-die 2u and the air knife 22 are connected.
An elongated body 24 with elongated grains corresponding to changes in the interval between the two is stretched, and is made of a soft synthetic inverted lining with a tapered shape.

This handling body 24 consists of an upper wall 25 and a pair of left and right side walls 26 interconnected by this firefly zbvc, the paper surface of which faces towards the cooling roll 210, , the upper part 425a is connected downward to the T-die 21 in an air-sealed state, and its lower end 25b is connected to the upper surface of the F-knife 22 in an air-sealed state. l from both 9111 edges of the upper wall 25
City roll 21 li on the same side: +4 ke 4 niJg
d valley n++126 bottom yiN at 26 a is cut m
(See Figure 2'5)
~These upper walls 25 and l+I+j IIUl Aoi 2 b
rc, cs, ritl slit 2 of T die 20
LIa and Fukai 722 F3il Tadasuitaro 261h1
The top 1 of the bath melting group J30 or the outside air is
The lower end 25b is closed on the upper surface of the air knife 22, and there is only a gap 27 in the shape of IJ between the air outlet 26 of the air knife 22 and the circumferential surface of the one-legged roll 21. Then, the outside air and the inside of the cover body 24 are in communication.

[Function] The effect of the present Tl1L invention, which has been criticized as described above, will be explained in conjunction with the present molding method.

The bath melt group discharged from 2Ua of the T-die 20 is handled according to the relative movement difference between the rotational movement of the cooling roll 21 and the coupled output of the cutting group from the T-die 2υ. body 24
As if being pulled to the side, lower the rr roll 21 times, cut the inside of the cover body 24, and blow out the F-knife 22.
26 FJIJ l1kl Vc:j6, and by the pressure of the cold bandit blowing out from this outlet 26, this stone side %4B is brought into close contact with the 21st round curve of the cooling roll of the 191 rolling instep and becomes cold f41, It foot thickness Form the film on the film in 1 to 3 seconds.

At this time, a part of the wind blown out from the air outlet 26 of the air knife 22 is concentrated in the penetrating part 27 to the enclosing part 24, and the pressure of the parting part 24\P' rises and removes, and the T-die 200 slit) 2
(A pressurized gP, which is isolated from the outside air, is formed above the pericardium and Bo between la and the air outlet 26 of the F-knife 22, and under pressure, this pressure gP is accompanied by vibrations. A film F having a uniform thickness and good optical properties is immediately formed.

If I#1 between the T-die 20 and the F-knife 22 is set by θ・1 h according to the thickness 4 of the film to be formed, then 1iil
Recording percentage: 24 is extended by the amount commensurate with the adjustment,
A pressurizing pipe P that is always dammed is formed on the ilj bath distribution membrane.

[Effect]

In the invention according to the present molding method which acts in a negative manner as described in NiI, due to the formation of the autopsy pressurized body P, the T-die 2U which has not yet been assimilated and is in the eaves of the bath f is mainly transferred to the F-knife 22. Bath time S! Transfer 13o with 1111 impression Buddha heddle! 1jj
1, and the target force i40 is applied to the circumferential surface of Jμm le z1, and at the same time, the recording on the horizontal J is stopped by 1sI with the pressure intention, and the thickness of the sky is restrained by the force struggle. , it is possible to fold this "lit fusion JM" around the cooling roll 21 of the F-knife 22 and on top of the cooling roll 21 of the F-knife 22 while preventing it from floating, and as a result, the blowing of the F-knife 22 l
Due to the cold pressure blown out from 26? Synthetic membrane B all over
During the process, it is possible to physically apply W RQ around the cooling roll 21, and to make the thickness of the film A l+' formed at high speed uniform, improving transparency and brightness. It is possible to improve optical properties such as

The present device invention can be implemented as a high-intensity autopsy molding method, and 70)
In addition to being able to demonstrate all the effects associated with the molding method, F3iJ
In order to expand and contract in response to the change in pressure between the T-die 20 and the F-knife 22, the plastic seal 24 is used to expand and contract the 'nc K-cutting pressurized silkworm P between the T-die 20 and the air knife 22. (l
By applying the above-mentioned shape, it is possible to form a film with constant uniform thickness and good optical properties.

In addition, in the IJIJIi self-congratulation ceremony, the 7-buif 22 is
Whether it is a single installation or multi-stage, this % bright binding is the same, T-die 20 Surin) 2 Lla ¥ 1 cup 1 tl
RIQ My request may also be different depending on the messenger.

[Effects of embodiment]

DIJ if you want to move the body 24 to the position of a snake-like sword (in the case of an accessory, the cover body 24 can be expanded and contracted well, and the body 24 can be placed in the position of a snake). As shown in Figure 5, in the rear body 24 consisting of an upper wall 25 and a flesh wall 26, the communication between the inside and the outside of the enclave 24 is through the 1 volcano mouth 26 of the F-knife 22 and the 21 rolls of the shearing roll. Between the surface IA
270) The common 11O located between the T-die 20 and the air knife 22 is isolated from the outside air in the thickness direction and the direction of cutting, and the cooling roll 21i111 is cooled by pressurized nitrogen gas.
The film is pushed out to j, and the movement is made more effective (g) even in the same way in all directions, so that a film with a uniform thickness can be produced.

[Fusage 691 chestnut] Diameter 9 (Jtum T die, polypropylene synthesis side 1
Extrude the stone at 162 ky per unit time, J speed 0.02 time x 15 cl U mm film using 4 of the single stage air knife 9 and rice forming method, and the handling of % ψ] 24. The thickness and optical properties of the film formed by the molding method used are as shown in the table below.

Dragon

[Brief explanation of the drawing]

The figures relate to this invention; Figures 1 and 3r2 are known examples, and Figure 6 is an outline of a typical embodiment of the device invention.
Fig. 114 shows the poor installation condition of the memorial, and Fig. 4-4, and Fig. 5 show the wear-resistant roll and the thin body 1IIll of the 9W ore under the wall. Breaking the relationship 1 Already II+
8 is a side view. Explanation of the main symbols in the diagram 20... T-die, 21... Disposal roll, 22... F-knife, 24...
Enoki body. Pin Applicant Plako Co., Ltd. Product 1

Claims (1)

[Scope of Claims] 1) When TfIM of thermoplastic synthetic resin is extruded through the slit of 11 dies to form a general contact and brought into contact with the surface of a cooling roll during rolling of 1 g, it is extruded from the blow-off port of one or more stages of F-knife. Is it blown out? This bath-melted film is densely layered on the circumferential surface of the acetylation roll by wind pressure, and then cooled to form a film with a thickness of f9r. Immediately forming a thermoplastic synthetic resin film at 10°C on the cooling roller. A pressurized storm is formed on the bath exchange from the slit of the T-die, which is provided through the circumferential surface, to the outlet of the F-knife, and is protected from the outside air, and the air flows from the T-die to the F-knife under pressure. 1. A heavy-speed forming method for a thermoplastic synthetic lateral line film, characterized in that a penultimate film is moved. 2) The thermoplastic synthetic resin bath melt film formed through the slit of the T-die is blown out from the blow-off port of a -shaped or multistage F-knife onto the surface of a rotating cooling roll provided close to the T-die. In a high-speed molding machine equipped with a T-die for thermoplastic synthetic side line film, the film is MWed by cold air pressure and cooled to a predetermined thickness. The upward movement of the bath melting film from the outside air is y soul 1tj [The body that bends several times in the same position follows the change in the interval between the cutting 8 T die and the cutting I air buoy 71 river, and the 1 ψM aim. A feverish n! ll: High-speed molding machine for molding resin film. 6)) IIJ record body is popular #+1! There is a gap in the width direction of llIM, near the top end, and y! on the bottom surface of the dT die! An earthen wall that is covered with Ayu and delayed to the upper surface of the F-knife near the lower end;
It consists of a pair of left and right 11+ll walls interconnected by this upper wall. Under the walls on both sides! The connection is! IIJ, whose circumferential surface is in close contact with the circumferential surface of the cooling roll, and whose bottom surface is open toward the circumferential surface of the cooling roll;
It is characterized by a bellows-shaped, soft synthetic resin door *
fff A high-speed molding machine with a T-die for thermoplastic synthetic resin film according to claim 1 and 2.