JP2012131192A - Molding apparatus for waste plastic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molding apparatus for waste plastic, which can suppress a floating of a waste plastic film by producing a function pushing a waste plastic raw material supplied into an annular die from top down, and reduce an amount of escaping in a revolution travelling direction of a pushing roller to increase an amount of throughput.SOLUTION: The molding apparatus for waste plastic has the annular die 1 and the pushing roller 3, and next compression passages 14 and 14 are partitioned by a partition wall 12. In the molding apparatus, an upward slope edge 12a is formed on the inner peripheral side end edge of the partition wall, the under side projecting toward the inner direction of the annular die. A downward sloping surface 3a is formed on the outer peripheral surface of the pushing roller, the upper side projecting in the outer peripheral direction so as to face the upward slope edge of the partition wall.

Description

The present invention relates to a molding apparatus for waste plastic for producing a recycled solid material that can be used as fuel or the like by compressing a waste plastic raw material including a waste plastic film such as a garbage bag into a granular shape or a rod shape.

2. Description of the Related Art Conventionally, a molding apparatus for producing a regenerated granular material using industrial waste as a raw material is known (see Patent Document 1).

This conventional molding apparatus is in a state in which a large number of radially extending compression passages are arranged in parallel in the circumferential direction and inscribed in the inner periphery of the annular die by a vertical rotation shaft provided at the center of the annular die. And a pushing roller that revolves and revolves, and the waste material supplied into the annular die is pushed into the compression passage by the pushing roller, whereby the waste material is compressed and molded.

The compression passage of the molding apparatus is formed by opening the pressing opening on the inner peripheral surface of the annular die, and the adjacent compression passage is partitioned by the partition wall. Conventionally, the inner peripheral end of the partition wall The edge is formed as a vertical edge, and the outer peripheral surface of the pressing roller facing the edge is also formed as a vertical surface.

By the way, when the waste raw material used in the molding equipment is waste plastic raw material including waste plastic film such as garbage bags, the waste plastic film is thin, lightweight or long, so the rotation of the push roller There is something that will rise up.

If the waste plastic film in such a floating state is not crushed to a certain size (for example, 5 cm or less), it becomes difficult to push the waste plastic film into the compression passage by a pushing roller. There was a problem that it could not be improved.

JP-A-9-253473

However, when the inner peripheral side edge of the partition wall and the outer peripheral surface of the pressing roller facing the partition wall are formed perpendicularly as in the conventional molding apparatus, the pressing direction by the pressing roller is only the horizontal direction. Therefore, the action of pressing down the waste raw material supplied into the annular die from above does not occur.
For this reason, when the waste raw material is a waste plastic including a thin and lightweight waste plastic film, the lifting of the waste plastic film cannot be suppressed.

In addition, the waste material supplied into the annular die is subjected to the compression force by the pressing roller and the frictional force due to the rotation of the pressing roller, and is bitten and pushed into the compression passage. Since the waste raw material that has not been bitten escapes in the direction of the inlet without a wall or in the direction of revolution of the push roller, reducing the escape amount is important for improving the throughput.

The present invention suppresses the lifting of the waste plastic film by causing the action of pressing down the waste plastic material supplied into the annular die from the top to the bottom, and reduces the amount of the pushing roller that escapes in the revolving direction. It is an object of the present invention to provide a molding apparatus for waste plastic that can increase the processing amount.

In order to solve the above problems, the molding apparatus for waste plastic of the present invention is
An annular die (1) is formed by an annular die (1) in which a plurality of radially extending compression passages (14) are arranged in the circumferential direction, and a vertical rotation shaft (72) provided at the center of the annular die (1). ) Provided with a pushing roller (3) that revolves in a state inscribed in the inner periphery of the inner wall and rotates to push the waste plastic material into the compression passage (14),
Each of the compression passages (14) opens to the inner peripheral surface of the annular die (1) to form a push-in port (15), and opens to the outer peripheral surface of the annular die (1) to have a discharge port (16). In a molding apparatus for waste plastic formed and adjacent compression passages (14), (14) are partitioned by a partition wall (12),
An upward inclined edge (12a) whose lower side protrudes toward the inner direction of the annular die (1) is formed on the inner peripheral side edge of the partition wall (12),
And the downward inclined surface (3a) which the upper side protruded toward the outer peripheral direction is formed in the outer peripheral surface of the said pushing roller (3) so that the upward inclined edge (12a) of the said partition wall (12) may be opposed. The configuration.

The molding apparatus for waste plastic according to the present invention has an upward inclined edge formed on the inner peripheral side edge of the partition wall for partitioning the compression passage, and a downward inclined surface facing the upward inclined edge on the outer peripheral surface of the pressing roller. The structure formed on the surface is characterized.

In the waste plastic molding apparatus according to the present invention, the waste plastic raw material supplied into the annular die is compressed and molded by biting the waste plastic raw material by the compression force and the frictional force acting by the pressing roller. . At this time, due to the resultant force of the compressive force and the frictional force, among the waste plastic raw material, (b) the amount of biting in the direction opposite to the revolving direction of the push roller, and (b) the amount pushed into the compression passage. And (c) an amount of escape in the direction of the insertion port and (d) an amount of escape in the direction of revolution of the pushing roller.

At this time, as described above, if an upward inclined edge is formed on the inner peripheral edge of the partition wall and a downward inclined surface is formed on the outer peripheral surface of the pushing roller, (c) the amount of escape in the inlet direction And (d) the amount of the pushing roller that escapes in the direction of revolution progress can be reduced. Furthermore, the waste plastic material supplied into the annular die can be pushed into the compression passage while being pushed not only in the horizontal direction but also obliquely downward from above.
As a result, the amount of processing can be increased by compressing the waste plastic film as much as possible.

BRIEF DESCRIPTION OF THE DRAWINGS The whole sectional side view which shows the outline of the molding apparatus for waste plastics concerning the Example of this invention. The whole top view which shows the outline of the molding apparatus for waste plastics. The side view which shows the principal part of the molding apparatus for waste plastics. The plane sectional view showing the important section of the molding device for waste plastics. The plane sectional view showing the important section of the molding device for waste plastics. The side view which shows the principal part of the shaping | molding apparatus for waste plastics concerning another Example. The whole sectional side view which shows the outline of the shaping | molding apparatus for waste plastics concerning another Example. The plane sectional view showing the important section of the molding device for waste plastics concerning other examples.

The molding apparatus for waste plastic according to the present embodiment includes an annular die 1 installed horizontally on a gantry 5 as main components, and push rollers 3 and 3 that rotate in contact with the inner periphery of the annular die 1. .

As shown in FIG. 2, the annular die 1 is formed in an annular shape (doughnut shape) by arranging a large number of die members 1 a having a radial direction in the longitudinal direction in the circumferential direction.
Each die member 1a has a cross-sectional shape (a cross-sectional shape perpendicular to the radial direction of the annular die 1), with the upper wall 10 and the lower wall 11 connected by the partition wall 12, and the partition wall 12 as a boundary. It is formed in a substantially I shape with the U-shaped grooves 13 and 13 back to back.
Since the respective die members 1a are arranged in parallel in the circumferential direction and connected in an annular shape, as shown in FIG. 4, the upper wall 10 and the lower wall 11 have an inner peripheral side width L1 larger than an outer peripheral side lateral width L2. Is also narrowly formed.

And the compression channel | path 14 is formed by arranging this die member 1a in parallel in the circumferential direction, and match | combining adjacent U-shaped groove parts 13 and 13. As shown in FIG.
The compression passage 14 extends in the radial direction of the annular die 1 and opens on the inner peripheral surface of the annular die 1 to form a push-in port 15. The compression passage 14 opens on the outer peripheral surface of the annular die 1 and the discharge port 16 has a discharge port 16. Is formed.

The adjacent compression passages 14 and 14 are structured to be partitioned by the partition wall 12, and the thickness of the partition wall 12 is gradually narrowed from the outer peripheral side toward the inner peripheral side.
In this embodiment, as shown in FIG. 5, the passage width of the compression passage 14 is formed so that the outer circumference side passage width L3 gradually becomes narrower than the inner circumference side passage width L4 over its entire length.
As shown in another example of FIG. 8, the compression passage 14 is formed so that the passage width of the compression passage 14 is substantially the same from the outer passage width L5 to the middle passage width L6, and from the middle passage width L6 to the inner circumference side. The passage width L7 may be formed so as to gradually increase.

The upper part of the annular die 1 is covered with a casing 6, and waste plastic raw materials including a waste plastic film are introduced into the casing 6 by a raw material feeding means (for example, a screw conveyor) from an input port 61. This is supplied to the space 17.
In this way, the waste plastic material supplied to the internal space 17 of the annular die 1 is pushed into the compression passage 14 by the push rollers 3 and 3.

In this case, since the compression passage 14 is gradually narrowed from the pushing port 15 toward the discharge port 16, the waste plastic material passing through the compression passage 14 is compressed by applying a compression force, and The surface can be melted and bound by heat generated by friction.
In addition, the waste plastic raw material compressed and combined from the discharge port 16 is continuously discharged in a rod shape, and is bent into its own weight after being discharged to be formed into a rod shape of a certain length.

The pushing roller 3 rotates in contact with the inner periphery of the annular die 1, and a vertical rotation shaft 72 connected to the drive motor 7 via a power transmission mechanism 71 is provided at the center of the inner space 17. A roller support plate 73 is attached to the upper end of the vertical rotation shaft 72, and the two pushing rollers 3 and 3 are rotatably supported by the shafts 30 and 30, respectively, at 180 ° opposite positions on the roller support plate 73, and A connection reinforcing plate 39 is passed between the shafts 30 and 30.
The pushing rollers 3 are not limited to two, and a plurality of pushing rollers 3 may be provided at equal intervals (for example, three at intervals of 120 degrees).

Accordingly, the pushing roller 3 revolves around the vertical rotation shaft 72 (in the direction of arrow A in FIG. 2) by the rotation of the roller support plate 73 by the driving motor 7 and is inscribed in the inner periphery of the annular die 1 and the shaft 30. Rotation operation is performed such that rotation is performed around the center (in the direction of arrow B in FIG. 2).

As a characteristic configuration of the present invention, an upward slope in which the lower side protrudes toward the inner direction of the annular die 1 at the inner peripheral side edge of the partition wall 12 for defining the compression passage 14 of the annular die 1. An edge 12a is formed.
Further, a downwardly inclined surface 3a whose upper side protrudes toward the outer peripheral direction is formed on the outer peripheral surface of the pushing roller 3 so as to face the upward inclined edge 12a of the partition wall 12.
In this case, the entire inner peripheral side edge of the partition wall 12 is formed as an upward inclined edge 12a, and the entire outer peripheral surface of the pushing roller 3 is formed as a downward inclined surface 3a.

In addition, the inclined surfaces 18 and 18 are formed on both surfaces of the inner peripheral side end portion of the partition wall 12 so as to be narrowed, whereby the waste plastic raw material is disposed between the inner end of the partition wall 12 and the pushing roller 3. In addition to being effectively cut off, the pushing port 15 of the compression passage 14 is widened so that it can be pushed in smoothly.

In this way, the inner peripheral edge of the partition wall 12 is formed as the upward inclined edge 12a, and the outer peripheral surface of the pushing roller 3 is formed as the downward inclined surface 3a, whereby the partition wall 12 is supplied into the internal space 17 of the annular die 1. The waste plastic raw material can be pushed into the compression passage 14 while being pushed obliquely downward from above.
As a result, it is possible to suppress the lifting of the waste plastic film and to reduce the amount of the waste plastic film that escapes in the revolving direction of the push roller 3, thereby increasing the processing amount.

Note that the angle θ with respect to the vertical of the upward inclined edge 12a formed on the inner peripheral edge of the partition wall 12 and the downward inclined surface 3a formed on the outer peripheral surface of the pushing roller 3 increases the waste plastic raw material when the angle θ is small. However, when the angle θ is large, the action of pushing into the compression passage 14 is weakened. Therefore, the setting is made in consideration of these, but usually, the angle is about 15 to 50 degrees. We think that range is moderate.

The molding apparatus for waste plastic of the present invention can be effectively used not only for waste plastic raw materials but also for waste floating materials such as waste paper.
The total amount of the waste plastic raw material does not need to be waste plastic, and may include paper and wood chips.
Furthermore, although molding is possible even if metal such as iron scrap is mixed, mixing of metal or the like is not desirable for use as a fuel.

Next, FIGS. 6 and 7 show another embodiment.
The waste plastic molding apparatus shown in FIG. 6 has a large number of longitudinal grooves 31 arranged side by side in the circumferential direction on the outer peripheral surface of the pressing roller 3, and the frictional force is increased by the longitudinal grooves 31 to bite the waste plastic raw material. Therefore, the waste plastic raw material can be pushed into the compression passage 14 more efficiently.

The waste plastic molding apparatus in FIG. 7 is an example in which the cover 8 is mounted coaxially with the vertical rotation shaft 72 so as to be positioned below the charging port 61 of the casing 6. The waste plastic raw material is prevented from staying in the vicinity of the vertical rotation shaft 72 by flowing in the vicinity of the inner periphery of the vertical rotation shaft 72.

DESCRIPTION OF SYMBOLS 1 Circular die 12 Partition wall 12a Upward inclined edge 14 Compression path 15 Push-in port 16 Outlet 3 Push-in roller 3a Downward inclined surface 72 Vertical rotating shaft

Claims (1)

An annular die (1) is formed by an annular die (1) in which a plurality of radially extending compression passages (14) are arranged in the circumferential direction, and a vertical rotation shaft (72) provided at the center of the annular die (1). ) Provided with a pushing roller (3) that revolves in a state inscribed in the inner periphery of the inner wall and rotates to push the waste plastic material into the compression passage (14),
Each of the compression passages (14) opens to the inner peripheral surface of the annular die (1) to form a push-in port (15), and opens to the outer peripheral surface of the annular die (1) to have a discharge port (16). In a molding apparatus for waste plastic formed and adjacent compression passages (14), (14) are partitioned by a partition wall (12),
An upward inclined edge (12a) whose lower side protrudes toward the inner direction of the annular die (1) is formed on the inner peripheral side edge of the partition wall (12),
And the downward inclined surface (3a) which the upper side protruded toward the outer peripheral direction is formed in the outer peripheral surface of the said pushing roller (3) so that the upward inclined edge (12a) of the said partition wall (12) may be opposed. A molding device for waste plastics characterized by

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