JPH0639100B2 - Method for separating expanded polystyrene sheet - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for separating a foamed polystyrene sheet,
The present invention relates to a method in which a colored portion and a non-colored portion are separated into layers so that they can be separated and collected.

<Prior Art> Conventionally, most of expanded polystyrene sheets having a printed and / or colored layer on one side, for example, trimming loss sheets after sheet molding, are collected as scraps, regenerated and pelletized. In this case, compared with the printed and / or colored layer, the layer thickness ratio of the expanded polystyrene sheet as scrap is much higher than that of the printed and / or colored layer (45 to 90%), but the pellet When converted to color, the color penetrates into the ground color part and does not become white, resulting in pellets with color.
The reuse range will be narrowed and the value as a recycled product will be low.

The above-mentioned drawbacks occur not only when the printed and / or colored layer is a part of the expanded polystyrene sheet but also when it is a laminated film layer. Considering that the scrap generation rate for sheets is in the range of 10-40%,
In the expanded polystyrene sheet, it was also required from an economical point of view to separate the uncolored layer having a high layer thickness ratio from the layer of the colored portion and to regenerate it.

<Purpose> Therefore, in view of the above conventional circumstances, an object of the present invention is a method for easily separating the layer of the uncolored portion from the layer of the colored portion in the expanded polystyrene sheet.

<Structure> Then, a method for achieving the above-mentioned object is to pass an expanded polystyrene sheet having a layer printed and / or colored on one side between rotating rolls to automatically adjust the front and back of the sheet by the difference in physical properties of the front and back of the sheet. If the front and back sides are normal, supply them to the separation section as they are, and if the front and back sides are opposite, darken the front and back sides and supply to the separation section, or supply to a separation section different from the separation section. And separating the sheet into a printed and / or colored layer and a non-printed and / or colored layer.

<Embodiment> Next, an embodiment of the present invention will be described with reference to the drawings.

First, FIGS. 1 and 2 exemplify what is used as the material sheet piece (A), and the material sheet piece (A) is a layer obtained by printing and / or coloring a laminate film layer (20) on one side. The case of using the expanded polystyrene sheet (10) having the above will be described.

As shown in FIG. 2, the material sheet piece (A) is a printed and / or colored side (20a) of the laminated film layer (20) (hereinafter, for the sake of convenience, only colored) on the expanded polystyrene sheet (A). 10) is the inner surface facing, the film has various laminated films, polystyrene, polyethylene, polypropylene, other non-foaming synthetic resin, aluminum foil, a binder layer between the polystyrene foam sheet (e.g. When the film is polyethylene, it may be laminated via EVA or the like. The coloring of the laminated film layer (20), which is the coloring layer, is transferred or penetrated into the expanded polystyrene sheet (10) part of the white layer due to the solvent effect of the printing ink, and is not colored with the coloring layer. When it is separated into layers, the transferred or penetrated coloring (about 50μ) Expanded polystyrene sheet layer The laminated film layer (20) including the part (10a) and the uncolored part are foamed. Using a cutting blade for slicing the polystyrene layer (10b) (C)
-It will be separated at the position of (C ').

Next, the explanation will be sequentially made with reference to the embodying apparatus shown in FIGS. 4 and 5, but as the expanded polystyrene sheet with a laminated film as the material sheet piece (A), the trimming loss sheet after sheet forming as shown in FIG. Clamp marks (1) are left on the trimming loss sheets on both sides in the longitudinal direction.

Feeding part of material sheet piece (A) by trimming loss sheet
Vibration hopper (31) via feed hopper (30) in (I)
A belt (33) with a needle (32) feeds it upward from the inside and feeds it to a side of the judgment rolls (40) (40) in the judgment section (II) by a curved direction change guide (34).

The physical properties of the laminated film (20) side and the expanded polystyrene sheet (10) side with this judgment roll (40) (40) are utilized by making use of the difference in surface condition such as friction resistance to the judgment roll (40) (40) side. Determine the front and back of the material sheet piece (A) that is introduced indiscriminately. That is, when the laminate film (20) side is the front side, in relation to the cutting position in the separating section described later, for example, the case where the front side is the lower side is conveyed, the normal (normal) conveyance is the front side. When the sheet comes in with the upper side facing up, the material sheet piece is compressed and curled by the judgment roll. At that time, it will always curl to the film side and warp, and the front and back will be inverted to the cutting blade (50) that will become the separating part (III) via the guide guide cylinders (41) (41 ') that twist 90 ° each. It is fed in the closed state, that is, with the film side down. Conversely, even if the film side, the front side is turned down and passes the judgment rolls (40) (40), it curls to the same film side, and the lower direct feed type guide guide tube (42) (42 ') After that, it is fed to the cutting blade (50) which will be the separation section (III). This cutting blade (50) is a filter blade that rotates endlessly in a direction orthogonal to the feeding direction of the material sheet piece (A), and its cutting edge is adjusted in advance to a position suitable for slicing. is there.

The thickness of the material sheet piece (A) includes the laminated film.
In the case of about 1.5 to 5.2 mm, the colored part is transferred or penetrated and the laminated film side including the expanded polystyrene layer part is cut to 0.2 to 1.6 mm, and the uncolored expanded polystyrene layer is cut to about 1.3 to 3.6 mm. Will be separated.

The separated sheets are fed to separate crushers (60) (60 ') of the collecting section (IV), crushed and pneumatically transported, and collected in a collecting hopper (not shown).

By the above-mentioned implementation, the laminated film (20) layer in a state including the expanded polystyrene sheet layer part (10a) in which coloring is permeated, and the expanded polystyrene layer which is not colored and is not printed and / or colored It can be separated into (10b).

Incidentally, in the examples, the hopper (30) in the supply section of the figure (I)
The material sheet piece (A) enters the vibrating hopper (31), which is a vibration type, and the air is sucked by the blower (35) by suction here, and the material sheet piece (33) is sucked by the needle belt (33).
The needle (32) is hooked on the surface of (A) and conveyed upward. When there are two lines (X) and (Y) as shown in FIG.
2) is installed with a pitch of 1.5 m shifted by half pitch on both lines. The belt with needle (33) is more than 3.0 times the length of the material sheet piece (A).

(36) (36) is a pull-up roll, one side or both sides of which are sponge rolls, and one side is used as a slide shaft and pushed to the other side by using a spring or the like to prevent side slip of the material sheet piece (A). There is. The speed of the pulling rolls (36) (36) should be faster than that of the belt with needles (33). Direction change guide
(34) takes a height of 500 mm to make a streamlined curve.
Reference numeral (37) is a blower for supplying air into the guide (34) so that the direction can be easily changed. (38) is an intermediate guide tube, about 20
There is an angle of ゜ or more, and the material sheet piece (A) is on the inner surface.
It is convenient to stick a fluororesin sheet so that it can be prevented from adhering to
This can be done without this guide tube (38). .

Next, the determination rolls (40) and (40) in the determination unit (II) are made of metal or rubber, and both are made of the same material and are of one-side drive or both-speed drive type. Also, upper and lower guide guide tubes
(41) and (42) should have an entrance at a position that is slightly out of the center of the rolls (40) and (40), and in the upper twist type guide guide tube (41), the material sheet piece (A) is 90 Twisted by ゜ and sent to the reversing rolls (43), (43), then through the reversing rolls (43), (43), further twisted 90 ° by the twist guide tube (41 ′) and turned upside down (44) Further, while it is arranged so as to reach the immediately preceding guide (45), on the other hand, in the lower guide guide tube (42), the material sheet piece (A) is fed as it is without being twisted. Judgment roll with the intermediate roll (43 ') (43') as the boundary
It is preferable for feeding the material sheet pieces (A) that a distance of at least about 500 mm is required between the (40) and (40) and the feed rolls (44) and (44).

As another embodiment of the judging section (II), as shown in FIG. 6, the feeding of the material sheet piece (A) is carried out by the peripheral speed difference between the roll (40) and the roll (40 '). There is also a method of electrically determining the time difference at a predetermined interval (l) after passing through the rolls (40) and (40 ') depending on whether the film (20) side is on the front side or the back side. In this case, there is provided a gate (46) for electrically activating which of the upper and lower guide guide cylinders to enter after the determination.

As another embodiment, as shown in FIG.
If the laminate film (20) side is judged to be the front (upper) with I) set to two upper and lower locations, it is in the upper area (M), and if the laminate film (20) side is the reverse (lower), it is the lower area. Of the material sheet piece (A) is adjusted individually so that the cutting position for the material sheet piece (A) is the same for the upper and lower cutting blades (50), (50). The 90 ° twist guides (41) (41 ') as in the example are not necessary, and the direct feed guides (47) (48) and the direct feed rolls (49) (49) are sufficient. Also in this embodiment, the judgment rolls (40) and (40) may be capable of making the same judgments as in the previous embodiments. In the figure, (80) is a collection part on the side including the separated laminated film (20), and (70) is a collection part of expanded polystyrene that remains uncolored.

In the case of each of the above-mentioned examples, a foamed polystyrene sheet having a laminated film layer on one side formed as a printed and / or colored layer is used as a material sheet piece, and separation from that used is exemplified. Without forming the layer (10c) which is printed and / or colored on one side of the expanded polystyrene sheet (10) directly or through the binder layer (10d) as shown in FIG. Even if the printed and / or colored layer side is supplied to the separation part (III) with the side facing downward, the printed and / or colored layer and the expanded polystyrene layer (10b ) And can be reliably separated at the (C)-(C ') position by cutting.

In addition, the separation method of the present invention is applied to a sheet other than the trimming loss sheet (for example, a molding test sheet, a stain sheet, etc.)
Can also be applied to.

In any case, the expanded polystyrene sheet is separated by excluding a part of the layer to which printing and / or coloring is transferred or penetrated.

<Effect> Since the front and back of the expanded polystyrene sheet having a printed and / or colored layer on one side can be automatically discriminated as described above and appropriately fed to the separating section, the It is possible to automate the pre-stage work and connect it to the separation unit. Therefore, the expanded polystyrene layer that remains uncolored can be printed and / or reliably separated from the colored layer at the separating portion that has been appropriately fed to the sheet, and thus the expanded polystyrene sheet that remains uncolored can be printed. It is possible to recycle separately from the colored portion and / or avoid mixing of the printed and / or colored portion in reproduction, and to stabilize the material of the recycled product.

In particular, when the printed and / or colored layer is a laminated film layer, the laminated layer including a part of the expanded polystyrene layer in which the printed and / or colored is transferred or penetrated, and the printed and / or colored layer By separating the expanded polystyrene layer of the uncolored part as the expanded polystyrene layer, it is possible to reliably separate the uncolored expanded polystyrene sheet from other parts such as colored parts, especially the laminated film of different materials. It is convenient to use.

Therefore, the reuse ratio of the non-colored layer having a high layer thickness ratio in the expanded polystyrene sheet is increased, and the economic advantage is also great.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of expanded polystyrene sheet separated by the method of the present invention, FIG. 2 is a partially enlarged sectional view of the same sheet, and FIG. 3 is a partially enlarged sectional view showing a modified example of the sheet. FIG. 4 is a schematic side view showing an example of the embodying apparatus, and FIG.
FIG. 7 is a schematic plan view of the same device, FIG. 6 is a side view of a determining portion of the changing device, and FIG. 7 is a side view of a determining and separating portion of the changing device. (A) ...... Material sheet piece made of expanded polystyrene sheet, (1) …… Clamp mark, (10) …… Expanded polystyrene layer, (10a) …… Part of expanded polystyrene layer with coloring or transferred, ( 10b) ...... Expanded polystyrene layer as it is uncolored, (10c) ...... Colored layer, (C)-(C ') ...... Separation position (50) ...... Cutting blade.

Claims (4)

[Claims] 1. An expanded polystyrene sheet having a printed and / or colored layer on one side is passed between rotating rolls to automatically distinguish the front and back of the sheet by the difference in physical properties of the front and back of the sheet, and when the front and back are normal. Is supplied to the separation unit as it is, and when the front and back are reversed, the front and back are reversed and supplied to the separation unit, or supplied to a separation unit different from the separation unit to print and / or color the sheet. A method for separating a foamed polystyrene sheet, which comprises separating the layer into a printed layer and a layer not printed and / or colored. 2. When the printed and / or colored layer is a laminated film layer, the laminated film layer including a part of the expanded polystyrene layer to which the printed and / or colored layer is transferred or penetrated, The method for separating an expanded polystyrene sheet according to claim 1, wherein the expanded polystyrene layer is separated from a part which is not printed and / or colored. 3. The method for separating an expanded polystyrene sheet according to claim 1, wherein the printed and / or colored layer is a part of the expanded polystyrene layer. 4. The method for separating an expanded polystyrene sheet according to claim 1, wherein the printed and / or colored layer is a different color layer such as an aluminum foil layer. Claim 5: The method for separating an expanded polystyrene sheet according to claim 1, wherein the expanded polystyrene sheet is a trimming loss sheet after molding of the expanded sheet.