JPH0333617B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Technical Field> The present invention relates to a structure of a supply section in a separating device for expanded polystyrene sheets, and more particularly to a structure that facilitates the supply of trimmed loss sheets.

<Prior Art> Conventionally, expanded polystyrene sheets having a printed and/or colored layer on one side, such as trimmed loss sheets after sheet molding, have been mostly collected as scrap, recycled, and pelletized. In this case, the layer thickness ratio of the expanded polystyrene sheet used as scrap shows that the uncolored ground color layer is much larger (45-90%) than the printed and/or colored layer, but the pellet If the pellets become colored, the color will permeate and the pellets will not turn white, but instead will become colored pellets, which will narrow the range of reuse and reduce the value of recycled products.

The above disadvantages occur not only when the printed and/or colored layer is part of a foamed polystyrene sheet, but also when it is a laminate film layer. Scrap occurrence rate for sheets is 10~
Considering that it is within the range of 40%, it is required from an economic point of view to separate the uncolored layer, which has a high layer thickness ratio, from the colored layer and recycle it. It was hot.

Therefore, the present inventor proposed a method of layering and separating the colored portion and the uncolored portion, but it has been necessary to automatically supply the material sheet to be layered and separated in order to automate the separation device.

<Purpose> Therefore, in view of the above-mentioned conventional situation, the purpose of this invention is to
It is an object of the present invention to provide a structure of a feed section suitable for an apparatus in which it is desired to easily separate an uncolored layer from a colored layer.

<Structure> The structure for achieving the above object consists of a material sheet piece A made of a foamed polystyrene sheet having a colored layer and produced by trimming loss.
In a separation device that separates an uncolored layer from
A vibrating hopper 31 that accommodates the material sheet piece A in a vibrating state, and a needle belt 33 that is introduced into the vibrating hopper 31 and hooks the surface of the material sheet piece A to pull the material sheet piece A upward. and,
A curved direction changing guide 34 that guides the material sheet piece A pulled up by the needle belt 33 in the supply direction at a predetermined angle, and a blower 37 that assists the direction changing guide 34 in guiding the material sheet piece A by ventilation. 1 is a supply section structure in a foamed polystyrene sheet separation apparatus characterized by having the following features.

<Example> Next, an example of the present invention will be described with reference to the drawings together with an overview of the entire separation apparatus.

First, FIGS. 1 and 2 illustrate examples of the material sheet piece A used as the material sheet piece A. The material sheet piece A is a foamed polystyrene sheet 10 having a laminate film layer 20 on one side as a printed and/or colored layer. I will explain the case when using.

As shown in FIG. 2, the material sheet piece A has a printed and/or colored side 20a of the laminate film layer 20 (hereinafter simply referred to as colored for convenience), which is the inner surface facing the expanded polystyrene sheet 10. There are various types of laminate films, such as polystyrene, polyethylene, polypropylene, other non-foamed synthetic resins, and aluminum foil, and a binder layer (for example, if the film is made of polyethylene, EVA) etc.) and may also be laminated. The coloring of the laminate film layer 20, which is a colored layer, is transferred or permeated into a part of the uncolored expanded polystyrene sheet 10 due to the solvent effect of the printing ink, so that the colored layer and the uncolored layer are separated. When separating, the laminate film layer 20 containing a portion of the expanded polystyrene sheet layer 10a to which the color has been transferred or permeated (approximately 50μ) and the uncolored portion of the expanded polystyrene layer 10b are separated for slicing. It will be cut off at the C-C' position using a cutting blade.

Next, as will be explained sequentially using the apparatus using the present invention shown in FIGS. 4 and 5, the foamed polystyrene sheet with the laminated film that becomes the material sheet piece A is trimmed after sheet forming as shown in FIG. 1. A loss sheet is used, and for example, in the case of a trimming loss sheet on both sides in the longitudinal direction, holes of clamp marks 1 remain.

A material sheet piece A made of a trimming loss sheet is sent upward from a vibrating hopper 31 through a supply hopper 30 in a supply section by a belt 33 with a needle 32, and is sent to a judgment roll 40 in a judgment section by a curved direction change guide 34. , 40 side.

The material sheet pieces A are indiscriminately introduced into the judgment rolls 40, 40 by the judgment rolls 40, 40 by utilizing the difference in physical properties such as surface conditions such as frictional resistance between the laminate film 20 side and the foamed polystyrene sheet 10 side. Distinguish between the front and back sides of That is, if the laminate film 20 side is the front side, and the material sheet piece comes in with the front side facing up, the material sheet piece will be compressed and curled by the judgment roll. At that time, the result is always curled and warped toward the film side, and it passes through the guide tubes 41 and 41' that are twisted by 90 degrees and reaches the cutting blade 50 that serves as the separation part in a state where the front and back are reversed, that is, the film side is facing down. It will be sent to you in due course.
On the other hand, if the film passes through the judgment rolls 40, 40 with the front side facing down, it will curl toward the film side and pass through the lower direct-feed guide tubes 42, 42' to the separating section. Cutting blade 5
It is sent to 0. This cutting blade 50 is a filtering blade that rotates endlessly in a direction perpendicular to the feeding direction of the material sheet piece A, and its cutting edge is adjusted in advance to a position suitable for slicing.

When the thickness of the material sheet piece A is about 1.5 to 5.2 mm including the laminate film, the colored part is transferred or penetrated and the laminate film side including a part of the foamed polystyrene layer is 0.2 to 1.6 mm, and the uncolored foam is 0.2 to 1.6 mm. The polystyrene layer will be separated by cutting to about 1.3 to 3.6 mm.

The separated sheets are each sent to separate crushers 60, 60' of the recovery section, crushed, pneumatically conveyed, and recovered to a recovery hopper (not shown).

As a result of the above separation, 20 layers of the laminate film including the expanded polystyrene sheet layer part 10a into which the coloring has permeated, and the uncolored expanded polystyrene layer 10b that has not been printed and/or colored. It will be possible to separate.

In the supply section shown in the figure, which is the present invention, the material sheet piece A enters from a hopper 30 to a vibrating hopper 31, where it is sucked with air by a blower 35, which serves as a suction section. It is drawn toward the needle belt 33 side, hooks the needle 32 on the surface of the material sheet piece A by the needle belt 33, and transports it upward, and as shown in FIG.
When there are two Ys, the needles 32 are installed with a pitch of 1.5 m and are shifted by a half pitch on both lines. The needle belt 33 is made of material sheet piece A.
The best thing to do is to have a length of 3.0 times or more.
Preferable for upward supply using a needle.

Reference numerals 36 and 36 refer to pull-up rolls, one or both of which are sponge rolls, one of which is used as a slide shaft and pushed toward the other using a spring or the like to prevent the material sheet piece A from sliding sideways. The speed of the pulling rolls 36, 36 is determined by the needle belt 33.
Make it faster than Direction change guide 34 is 500
The height of mm is taken to create a streamlined curve. 37
is a blower that supplies air into the guide 34 to facilitate direction change. 38 is the intermediate guide cylinder, which is angled at an angle of about 20 degrees or more, and it is recommended that a fluororesin sheet be pasted on the inner surface to prevent it from adhering to the material sheet piece A, or that the surface be treated with fluororesin. Although it is convenient for implementation, this guide tube 38
It can be carried out without.

Next, the determination rolls 40, 40 in the determination section following the supply section of the present invention are made of metal or rubber, both of which are made of the same material and driven either on one side or at the same speed. Also, the upper and lower guide tubes 4
1 and 42 have their entrances slightly protruding and away from the center of the rolls 40 and 40, and the upper twist-type guide tube 41 allows the material sheet piece A to
It is twisted by 90 degrees and sent to the reversing rolls 43, 43, and further passed through the reversing rolls 43, 43 to the twisting guide tube 4.
Twist 90 degrees at 1' and turn it inside out and feed roll 4.
4, 44 and further to the straight cylinder guide 45, whereas in the lower guiding cylinder 42, the material sheet piece A is fed as it is without being twisted. From intermediate rolls 43', 43' to judgment rolls 40, 40 and feed rolls 44, 44
From the viewpoint of feeding the material sheet piece A, it is preferable to require a gap of about 500 mm or more.

As an example of another determination unit, as shown in FIG. 6, the difference in peripheral speed between the roll 40 and the roll 40' is used to determine whether the material sheet piece A is fed with the laminate film 20 side facing up. There is also a method of electrically determining the time difference at a predetermined interval 1 after passing through the rolls 40, 40' depending on whether the paper is on the back side. In this case, a gate 46 is provided which electrically operates to determine which of the upper and lower guide tubes to enter after the determination.

As another example, as shown in Fig. 7, if the separation part is in two places, upper and lower, and the laminate film 20 side is determined to be the front side (top), the laminate film 20 side is determined to be the front side (top), and the laminate film 20 side is the back side (bottom).
If the cutting blades 50, 50 are individually adjusted so that the cutting positions for the material sheet piece A are the same for the upper and lower cutting blades 50, 50, As an example of
The 90° twisting guides 41, 41' are no longer necessary, and the direct feed guides 47, 48 and the direct feed rolls 49, 49 are sufficient. In this embodiment as well, the determination rolls 40, 40 may be of any type that can perform the same determination as in the previous embodiment. In the figure, reference numeral 80 indicates a collection section containing the separated laminate film 20, and reference numeral 70 indicates a collection section for uncolored expanded polystyrene.

In each of the above examples, the separation was exemplified using a foamed polystyrene sheet formed as a printed and/or colored layer on one side of the laminated film layer as a material sheet piece. As shown in FIG. 3, a printed and/or colored layer 10c is formed on one side of the expanded polystyrene sheet 10 directly or via a binder layer 10d. If the colored layer is fed to the separating section with the colored layer facing downward, the printed and/or colored layer and the uncolored foamed polystyrene layer 10b can be separated at the C-C' position. This means that it can be separated reliably.

Furthermore, the separation method of the present invention can be applied to sheets other than trimmed loss sheets (for example, molded test sheets, dirty sheets, etc.), and in the case of sheets that are difficult to start from the supply section of the implementation apparatus described above, separation It is also possible to manually feed the sample directly to the section and separate it.

Further, in any case, the expanded polystyrene sheet is separated by excluding a portion of the layer in which printing and/or coloring has penetrated.

The uncolored expanded polystyrene layer can be reliably separated from the printed and/or colored layer by slicing with the cutting blade at a predetermined position as described above. Print and/or reproduce the sheet separately from the printed and/or colored parts.
Alternatively, it is possible to avoid mixing of the colored portions during recycling, thereby stabilizing the material quality of the recycled product.

In particular, when the printed and/or colored layer is a laminated film layer, the printed and/or
Or, by separating the laminate layer, etc. that includes a portion of the expanded polystyrene layer to which the coloring has been transferred or permeated, and the expanded polystyrene layer that is not printed and/or colored, an uncolored layer can be formed. The intact foamed polystyrene sheet can be reliably separated from other parts such as colored parts, especially the laminate film made of different materials, and it is convenient for reuse after separation. Usage rate increases.

<Effects> By adopting the feeding section structure of this invention, as described above, it becomes possible to automatically feed the foamed polystyrene sheet, and it becomes very easy to feed the sheet to the next process without any difficulty, and the layer separation of the foamed polystyrene sheet This contributes to the automation of separation.

In particular, since the needle belt 33 is introduced into the vibrating hopper 31, even if the material sheet piece A is made of trimming loss sheets, which tend to get entangled with each other due to their shape, the material sheet piece A can be vibrated. By hooking it onto the needle 32 in this state, the material sheet pieces A can be reliably separated and fed one by one. In addition, the material sheet piece A made of the trimming loss sheet tends to get caught and become difficult to convey when the direction is changed by the curved direction change guide. The sheet piece A can be easily changed in direction and guided in the feeding direction, and together with the separation and feeding by the vibration described above, the material sheet piece A can be fed very smoothly. , it is very suitable for automating layer separation.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of a foamed polystyrene sheet as a supply material, Fig. 2 is a partially enlarged sectional view of the same sheet, Fig. 3 is a partially enlarged sectional view showing an example of a modified sheet, and Fig. 4 is a plan view showing an example of a foamed polystyrene sheet as a supply material. A schematic side view showing an example of a device including the present invention; FIG. 5 is a schematic plan view of the same device;
FIG. 6 is a side view of the determining portion of the changing device, and FIG. 7 is a side view of the determining and separating portion of the changing device. A... Material sheet piece made of foamed polystyrene sheet, 1... Clamp marks, 10... Foamed polystyrene layer, 10a... Part of the foamed polystyrene layer to which coloring etc. has been transferred or permeated, 10b... Foamed polystyrene layer with no coloring, 10c... Coloring layer, C-
C'...separation position,...supply section,...judgment section,...separation section,...recovery section, 30, 31...supply hopper,
33...Belt with needle, 34...Direction conversion guide.

Claims (1)

[Scope of Claims] 1. In a separation device that separates an uncolored layer from a material sheet piece A made of a foamed polystyrene sheet having a colored layer and generated due to trimming loss, the material sheet piece A is accommodated in a vibrating state. A vibrating hopper 31 that is introduced into the vibrating hopper 31 and hooks the surface of the material sheet piece A and pulls the material sheet piece A upward; Foamed polystyrene characterized by having a curved direction changing guide 34 that guides the material sheet piece A in the supply direction at a predetermined angle, and a blower 37 that assists the direction changing guide 34 in guiding the material sheet piece A by ventilation. Supply section structure in a sheet separating device. 2. A supply section structure in the foamed polystyrene sheet separating apparatus according to claim 1, wherein a blower 35 for sucking the material sheet piece A toward the needle belt 33 is installed in communication with the needle belt 33.