JPS59213455A - Waste strip film regenerating apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field] The present invention relates to a processing device for recycling slint films on both sides of the edges that are produced during the production of flat films using the T-die method or the inflation method. It is something.

[Prior art]

Conventionally, this type of method produces a flat film F.

When manufacturing both i! lI toen 2o to 5Qag
Often, a film of the desired width and thickness is obtained by cutting the slit film to its width (1 is often discarded as waste in the cut slit film, but in recent years, effective methods for disposing of these wastes have been developed. This material is pulverized by a slit film pulverizer as shown in Figure 1 and mixed into Belene B, which is a raw material for film forming.

However, the powder 7, IrujinjnPz, which was injected into the powder, was lighter in color and its bulk density was 1/10/'7 to 11 of that of Belem) B.
5, and even when mixed with pellets, the mixing limit is 410 to 120 V in the case of high density polyethylene and only 5 to 1 V in the case of low density polyethylene, and the mixing ratio is limited. If the cut film waste is a thin film,
Since these are lightweight and float, it is difficult to mix them with the raw material pellets at a constant ratio, which may result in uneven quality of the product.

〔the purpose〕

Therefore, the present invention is intended to continuously supply the slit film, which is the cut-off film waste, to a double-forming processing device so that it can be recycled into pellets and easily mixed with the raw material pellets again. This is also to prevent the slit film from being discharged from the workplace as industrial waste.

〔composition〕

In this invention, the inner circumferential direction of the outer cylinder surrounded by the heater and the screw shaft rotating therein have a tapered shape whose diameter decreases from the root to the outlet. At least one small hole for extrusion is provided at the tip between the outer cylinder and the screw shaft tip by at least one die member attached to the tip, and at the outer end of the small hole part. , a cutter that slides relative to the outer end surface is provided, the tip end of the screw shaft is exposed to the outside, and a cooling air passage is provided in the center of the screw shaft, The discharge port is opened at the tip surface of the screw shaft exposed to the outside, and a supply port is provided in the outer cylinder at a position corresponding to the large diameter root, and an M6 waste slit film is provided near the supply port. This is a waste slit film recycling processing device characterized in that it is provided with at least one guide roller for delivery.

[Actual 7M Embodiments] This invention will now be explained based on the representative *embodiments shown in the drawings.
do.

[Embodiment 4i? N) As shown in Figure 2, numeral 10 is an outer cylinder, the outer circumferential surface of which is surrounded by a heater 11.

This inner circumferential surface 12 has a large base (and a tapered tip that is the outlet), and the screw shaft 16, which is provided with a slight gap from this inner circumferential surface, has a y-similarity to the inner circumferential surface 12. The screw IM 13 has a tapered shape, and a groove 14 of one bite or several days is carved in the screw shape on the outer peripheral surface of the screw IM13.

The α diameter ratio between the root and tip of the tapered cylinder 10 and the screw shaft 16 is about 1A to V5, and in the illustrated embodiment, the value is about 1/2. In the example, if the length from the root to the tip is 50 mm, the diameter of the root is 50 mm and the diameter of the outlet is 25 mm.

The tip of the screw shaft 16 becomes a small diameter 1" round part 15 which is slidably fitted into the cylindrical part 16 of the outer casing 10 and can rotate. On the outer peripheral surface of the circular mound part 15,
M) Several trough-like grooves 17 of the lateral gyrus extending from the inlet 14 are provided at equal angular intervals, and a small hole for extrusion is formed by the trough-like grooves 17 and the inner periphery 111 of the P3 cylindrical portion 16 of the outer casing 10. 18
is formed. Reference numeral 19 denotes a cutter that is slid onto the outer surface 11111, and is fixed to the machine base like the outer cylinder 10. 20 is the above school! This is a cooling air passage provided at the central axis of the J knee@15, and its discharge port 21 opens at the tip surface of the screw Ikl+16.

22 is a supply port provided in the large diameter part of the outer cylinder 10, and a guide roller 2 for guiding the slit film F is provided near this supply port.
3 is provided at least one.

This guide roller 26 is a pair of forced drive rollers 2 of the sandwich type.
6a and one guide roller 26b.

[Operation of Embodiment 1] In this invention configured as above, the heater 1
1, the slit film r in the outer cylinder 10 is heated to a sufficient degree to plasticize, and the slit film AF is passed through the guide roller 26 to the feed #022, and the screw shaft 16 is rotated. Due to the corner, the slit film F is transferred in the direction of the small diameter of the outer cylinder 10, and the heater 1
1 and the friction between the external bond 10 and the screw shaft 16, the resin is plasticized and turned into a molten resin, which is further moved in the direction of a smaller diameter and kneaded. In the vicinity of the burial mound 15, there is a bath flIIt!
The T4 fat fills the gap between the outer cylinder 10 and the screw shaft 16, and is pushed out while rotating from the gutter-like groove 17 provided on the outer peripheral surface of the [)j# part 15 as the screw shaft rotates 160 times. .

On the other hand, cooling air sent from the root side of the screw shaft 16 passes through the cooling air passage 20 in the center and is ejected from the discharge port 21 at the tip, and this air cools the circular mound 15 of the screw shaft 18. By cooling, the molten A1 fat approaching in the trough-like groove 17 is slightly cooled and solidified.

Each soft resin extruded from the gutter-like groove 17 has a size that is extruded by one rotation of the screw shaft 16.
The pellets are sequentially cut into Benz) J31 shapes by a fixed cutter 19, and are further cooled and solidified while falling through the cooling air blown out from the discharge port 21, to sequentially obtain pellets B1.

The example is shown in Figure 4, and the parts with the same symbols as Figures 2 and 3 have the same constituent features and functions. It is not a rotary cutter 19a, and its blade length is
The pellets are provided so as to slide into the outer end portions of all the small extrusion holes 18, and the length of the pellet is determined by the extrusion speed of the resin and the 1u rotation speed of the rotary cutter 198.

This rotary cutter 198 is attached to the screw shaft 16 as shown in Figure 4. An eccentric axis parallel to the 1ilI line.

[Includes 6] It is shown in Figure 5, and is the same as the above two embodiments)'
4 is that the extrusion/JX hole 18 is provided in a die 24 separate from the outer cylinder 10, and does not rotate together with the screw shaft 16 as in the above two embodiments, but is fixed. The narrow end portion 25 of the screw 1tlN6 is rotatably fitted with the die 24 by simply slipping.

It is cut into one piece by the motor 198 and becomes the pellet Bl.

The effect of the cooling air is to cool down the resin extruded from the small diameter portion 25 at the tip of the screw shaft 16 through the die 24 through the small hole 18 for the strand, and to cut the resin with the rotary cutter 19a. Discharge port 2 for pellet kh
It is further cooled by the cooling air discharged from 1.

〔effect〕

In this invention, which performs a grooving action like a steamer, the slit film i11, which is inevitably generated during film forming, can be continuously fed as it is, and furthermore, the slit film i11, which is unavoidably generated during film forming, can be supplied immediately as it is, and furthermore, the slit film i11, which is unavoidably generated during film forming, can be fed immediately as it is, and furthermore, the slit film i11 that is unavoidably generated at the time of film forming can be supplied immediately as it is. It is possible to supply the continuous slit film F from the wound film, and as mentioned above, since the outer cylinder and screw shaft 16 are tapered, the fullness increases as it is transferred to the outlet. The recycled pellets can be continuously pumped out, canted, and made into pellets, and the cooling process used to make J31 is also done using cooling air, which reduces the adhesion of moisture, and the recycled pellets can be used as they are (raw material). It can also be mixed with 1 (see Figure 116), making it possible to eliminate the production of multiple slit films F when the film is in G form.

Furthermore, this device itself is small, has a simple structure, and has almost no cause for failure. There is no need to finely discharge the slit film P before feeding it to this device, and supply is easy. [Effect of poor practice 45n] In the embodiments shown in Figures 2 and 6, the power to rotate the cutter 19 is also provided by the mechanism. The extrusion speed of the compressor is not necessary, and the extrusion speed of the compressor can be adjusted independently, and an appropriate speed can be selected for each.

In the embodiment shown in Fig. 315, the small extrusion hole 18 is fixed at a fixed temperature, so there is no risk of applying centripetal force due to the rotation of the screw shaft 160 to the resin being extruded.

In all other embodiments, the diameter ratio between the root and tip of the outer fm10 and the screw +11fi13 is 1/6 to 615, so the groove 16 cut into the screw shaft 16 The propulsive force due to the lead angle is larger, and the resulting plasticized collapse force is reliably transferred toward the exit.

A pair of forced drive rollers 2 are sandwiched between the guide rollers 26.
By providing 6a, the slit film F can be reliably fed at a constant speed.

[Brief explanation of drawings]

The drawings show what is related to this invention, and Figure 1 is an overall view of the film forming apparatus including a schematic diagram of the mechanism of a known reproduction device, Figure 2 is a vertical cross-sectional H side view of Embodiment 1, and Figure 6 is a diagram of the film forming apparatus. 1141 is a longitudinal side view of Embodiment 2.
Figure 5 is actually 21i! Figure 6 is a schematic diagram of the entire film forming apparatus incorporating the present device, and Figure 7 is a longitudinal sectional front view of another embodiment. In the figure, reference numerals 10...Outer cylinder, 11...Heater, 12...Inner peripheral surface, 16...
...Screw shaft, 14...Groove, 18...Small hole for pushing out, 19...
...Cup-119a...Rotary cutter, 20...
...Cooling all-air passage, 21, old...discharge port, 22...
..... 26.. guide roller.

Claims (1)

[Claims] 1) The inner surface of the outer cylinder surrounded by the heater and the screw shaft rotating therein both have a tapered shape whose diameter decreases from the root to the outlet. At least one small hole for extruding the outer cylinder, the screw shaft tip IHI, and at least two of the die members attached to the tip is housed in the outlet end of the outer cylinder.
A cutter that slides relative to the outer end surface of the 11Nf2 small hole is provided at the outer end of the small hole, and the tip end of the MJ screw shaft is exposed to the outside. There is a cooling gust passage in the center, and where is its outlet? There is an opening at the tip of the screw shaft exposed to the outside, and a supply port is provided in the outer cylinder at a position corresponding to the large diameter root. A waste slit film recycling processing device, characterized in that it is provided with at least one guide roller. 2) The small hole for extrusion is formed by providing an axial groove in the sliding outer peripheral surface of the tip of the screw shaft that is slidably fitted to the outlet of the outer cylinder. The waste slit film recycling processing device according to item 1. 6) The scrapped slit film recycling device according to claim 1, wherein the small extrusion hole is formed in a die attached to the outlet end face of the outer cylinder. 4) Claim 312, characterized in that the cutter is fixed to a member that is integrally fixed to the outer cylinder.
dffiff mislit film processing equipment as described in section. 5) The waste slit film recycling processing apparatus according to claim 2 or claim 6, characterized in that the cutter is an n'+1 cutter and roll cutter. 6) The waste slit film recycling processing apparatus according to claim 1, wherein the cutter is a rotary cutter arranged concentrically with the screw shaft.