JPH068010B2 - 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 shows that the uncolored ground color layer is much more (40 to 90%), but the pellet When it is made into a color, it spreads the color and does not become white (ground color) and becomes a pellet having a color, so that the reuse range is narrowed and the value as a recycled product becomes low.

Considering that the scrap generation rate for the original sheet is in the range of 10 to 40% in forming the expanded polystyrene sheet, the uncolored layer with a high layer thickness ratio is separated from the layer of the colored part in the expanded polystyrene sheet. It was also required from the economical point of view to regenerate it. In particular, when the printed and / or colored layer is a laminated film layer, the laminated film layer is often different from the expanded polystyrene layer, and therefore, it is highly necessary to separate and regenerate the laminated film layer.

<Object> In view of the above conventional circumstances, an object of the present invention is to provide a non-colored (ground color) foam polystyrene sheet.
This is a method for easily separating the layer of (3) from the layer of the colored portion.

<Structure> Then, a method for achieving the above-mentioned object is that a laminated film layer is laminated on an expanded polystyrene sheet so that an end portion thereof is located outside a clamp position at the time of molding and the laminated film layer is printed. And / or the edge of the colored layer is formed so as to be located inside the edge of the laminate film layer and outside the trimming position, and printing and / or printing is performed on the edge side of the laminate film layer.
Alternatively, when a blank portion which is not colored is formed and the printed and / or colored layer and the unprinted and / or uncolored layer are separated, first, simultaneously with or separately from the trimming after sheet molding, After cutting in the vertical direction at the position within the margin, the remaining trimming loss sheet is printed and / or laminated with the expanded polystyrene layer part where the coloring is transferred or penetrated, and the printing And / or a method for separating an expanded polystyrene sheet, characterized in that the expanded polystyrene layer is cut into a portion which is not colored.

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

First, the thing used as a raw material sheet piece (A) of FIG. 1 and FIG. 2 is illustrated, and the raw material sheet piece (A) is a layer in which a laminate film layer (20) on one side is printed and / or colored. The expanded polystyrene sheet (10) having the above is used. Then, as the expanded polystyrene sheet (10) with the laminated film, the expanded polystyrene layer (10b) to be the main layer, the laminated film layer (20) from the clamp position (P)-(P ') at the time of molding The edges (20c) are laminated so that the edges (20c) are on the outside and the edges (20b) of the printed and / or colored layer (20a) of the laminate film layer (20) are the edges of the laminate film layer (20). Formed so as to be located inward of the portion (20c) and outward of the trimming position (T)-(T ′),
A laminate film layer (20) having a blank portion (20d) which is not printed and / or colored on the end side is used. Laminating so that the end portion (20c) of the laminate film layer (20) is located outside the clamp position (P)-(P ′) is due to the elongation during molding, etc.
It is necessary to clamp up to. The end portion (20c) of the laminate film layer (20) is an expanded polystyrene layer (10b)
It may be laminated up to the same position as the end portion (10c).

Regarding such expanded polystyrene sheet, when separating the printed and / or colored layer and the uncolored layer from each other, first, simultaneously with or after trimming after molding, within the range of the margin (20d). Vertical in position (H)-
(H ') is cut and the completely white part is first cut and separated from the trimming loss sheet and collected.

As shown in FIG. 2, the material sheet piece (A) has a printed and / or colored side (20a) of the laminated film layer (20) (hereinafter, only colored for convenience sake) 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. Blank area (20d) by cutting in the vertical direction (H)-(H ')
The remaining sheet from which the white portion containing is removed is not transferred to the part of the expanded polystyrene sheet (10) whose coloring of the laminated film layer (20) to be the coloring layer remains uncolored due to the solvent effect of the printing ink. When it penetrates (about 50μ) and separates into a colored layer and an uncolored layer,
Laminated film layer (2) containing a part (10a) of expanded polystyrene sheet where coloring is transferred or penetrated.
0) and the expanded polystyrene layer (10
The cutting blade for slicing is used in b) to cut at the position of (C)-(C ').

Next, the explanation will be sequentially made with reference to the embodying apparatus shown in FIGS. 3 and 4 including the separating section. The expanded polystyrene sheet with a laminated film to be the raw material sheet piece (A) is as shown in FIG. The trimming loss sheet is used. For example, the holes of the clamp marks (1) are left on the trimming loss sheet 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, with the laminate film (20) side as the front side, when entering with the front side facing up, the material sheet piece is compressed by the judgment roll and curled. At that time, it will always curl to the film side and warp up, and the front and back will be reversed to the cutting blade (50) that will become the separating part (III) via the guide guide cylinders (41) (41 ') that twist by 90 ° In this state, the film side is fed downward. Conversely, even if the front side, which is the film side, goes down and passes the judgment roll (40) (40),
As a result, it curls to the film side and warps down, and as it is, it goes through the lower direct feed type guide guide tube (42) (42 ')
It is fed to the cutting blade (50) which will be II). This cutting blade (50) is a filter blade that is endlessly rotated in a direction orthogonal to the feeding direction of the material sheet piece (A), and its blade 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 laminated film side including the expanded polystyrene transfer that the colored part spreads and was transferred
0.2-1.6mm, uncolored expanded polystyrene layer 1.
It will be separated by cutting it to about 3 to 3.6 mm.

Each of the separated sheets is supplied to a separate crusher (60) (60 ') of the recovery section (IV), crushed, pneumatically transported, and recovered in a recovery hopper (not shown).

By the above-mentioned implementation, the laminated film (20) layer containing a part (10a) of the expanded polystyrene sheet in which the coloring is transferred or penetrated and the uncolored foam which is not printed and / or colored The polystyrene layer (10b) can be separated.

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) that is a vibration type, and the air is sucked by the blower (35), which is the suction part, and the material is fed by the belt with a needle (33). Sheet piece
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 a pitch on both lines. The belt with needles (33) is at least 3.0 times as long as the material sheet piece (A).

(36) (36) is a roll for pulling up, one side or both sides are sponge rolls, one side is a slide shaft and the other side is pushed by using a spring or the like to prevent the 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 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) should be 90 ° Twisted and sent to the reversing rolls (43) (43), then through the reversing rolls (43) (43), further twisted 90 ° with the twist guide tube (41 ′) and turned upside down (44) Further, while the straight pipe guide (45) is reached, the material sheet piece (A) is sent as it is without being twisted in the guide guide pipe (42) on the lower side. Judgment roll (40) with the intermediate roll (43 ') (43') as a boundary
It is preferable for feeding the material sheet piece (A) that a distance of about 500 mm or more is required between the (40) and the feed rolls (44) and (44).

In addition, as another embodiment of the judging section (II), as shown in FIG. 5, the material sheet piece (A) is fed by utilizing 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 the rolls (40) and (40 ') depending on whether the laminate 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 yet another embodiment, as shown in FIG. 6, the separating part (III)
If the laminate film (20) side is judged to be the front (upper) with two upper and lower parts, it is in the upper area (M), and if the laminate film (20) side is the reverse (lower), it is the lower area. If it is adjusted so that each cutting position for the material sheet piece (A) is the same with the upper and lower cutting blades (50) and (50), it will be in the zone (N). Time
90 ° twist guides (41) (41 ′) are not required
(47) (48) and direct delivery rolls (49) (49) will be 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.

Incidentally, the sheet piece recovered by first vertically cutting the completely non-colored layer including the blank portion (20d), which will be the separation in the first half, is
It is preferable to separate the laminate film layer and the expanded polystyrene layer in the same manner as in the latter half of cutting by slicing and then regenerate.

In addition, the separation by the latter half of the above separating methods can be applied to a sheet other than the trimming loss sheet (for example, a molding test sheet, a dirty sheet, etc.), and start from the supply unit of the execution device described above. In the case of a difficult form, it is also possible to directly supply it to the separation part by hand and separate it.

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> After completely separating the layer that is completely uncolored including the blank part (20d) by vertical cutting and collecting it, uncoloring is performed by slicing with a cutting blade at a predetermined position in the latter half. Since the expanded polystyrene layer as it is can be reliably separated and recovered from the printed and / or colored layer, the expanded polystyrene sheet as it is uncolored can be regenerated separately from the printed and / or colored part. It is possible to prevent the printed and / or colored portions from being mixed during reproduction, and to stabilize the material of the recycled product.

Since the printed and / or colored layer is a laminated film layer, the laminated layer including a part of the expanded polystyrene layer to which the printed and / or colored is transferred or penetrated is printed and / or colored. By separating it as the expanded polystyrene layer of the part that is not filled, the expanded polystyrene sheet that remains uncolored can be reliably separated from other parts such as colored parts, especially laminated films of different materials, which is convenient for reuse after separation. .

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 THE DRAWINGS FIG. 1 is a plan view showing an example of a foamed 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 an example of an apparatus. FIG. 4 is a schematic side view showing the same apparatus, FIG. 4 is a schematic plan view of the same apparatus, FIG. 5 is a side view of a determining portion of the changing apparatus, and FIG. 6 is a side view of a determining and separating portion of the changing apparatus. (A) ... Material sheet piece made of expanded polystyrene sheet, (1) ... clamping trace, (10) ... expanded polystyrene layer, (10a) ... partly expanded polystyrene layer with coloring or transferred, (10b) ... none Expanded polystyrene layer that is still colored, (10c) ... Edge of expanded polystyrene layer, (20) ... Laminate film layer, (20a) ... Layer of colored layer, (20b) ... Edge of layer of colored layer, (20c) … Edge of laminated film layer, (20d)… Margin, (T)-(T ′)… Trimming position, (P)-(P ′)… Clamping position, (H)-(H ′)… Vertical direction Cutting direction of (C)-(C ′)… Slice cutting direction.

Claims (1)

[Claims] 1. A laminated film layer is laminated on an expanded polystyrene sheet such that an end portion of the laminated film layer is located outside a clamp position at the time of molding, and an end portion of a printed and / or colored layer of the laminated film layer is It is formed so as to be located inward of the end of the laminate film layer and outside of the trimming position, and a blank portion which is not printed and / or colored is formed on the end of the laminate film layer. When separating the printed and / or colored layer and the non-printed and / or uncolored layer, first, at the same time as or separately from the trimming after forming the sheet, a vertical cutting is performed at a position within the margin. After that, the remaining trimming loss sheet contains laminae containing a part of the expanded polystyrene layer on which printing and / or coloring is transferred or penetrated. Coat layer and, print and / or expanded polystyrene sheet separation methods, wherein for dissecting to the expanded polystyrene layer portion colored that are not.