JP3002161B2 - Plastic material crushing and mixing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for crushing and mixing plastic materials, such as sprues and runners, discharged from a plastic injection molding machine and the like, for crushing and recycling plastic waste.

[0002]

2. Description of the Related Art Conventionally, plastics such as sprues and runners are pulverized into granules, and the pulverized materials are mixed with a plastic virgin material to form various plastic products.

[0003] At that time, various pulverizing / mixing apparatuses for automatically pulverizing plastic waste material and mixing the pulverized material with plastic virgin material are used.

[0004]

However, each of the conventional pulverizing and mixing apparatuses has a complicated structure having a large number of electric motors and a complicated and complicated control circuit, and requires a great deal of operation and maintenance. It took time and effort.

[0005] The present invention can solve such problems.
It is an object of the present invention to provide a pulverizing and mixing apparatus (hereinafter, referred to as a pulverizing and mixing apparatus) for recycling plastic waste material, which has a very simple structure and is easy to operate and maintain.

[0006]

In order to achieve the above object, a crushing and mixing apparatus according to the present invention comprises a tank for charging a plastic virgin material, a crusher for crushing plastic waste material, and a crusher for crushing by the crusher. A mixer for mixing the crushed material and the virgin material, wherein a mixer disposed below the crusher, a supply chamber disposed below the tank, and a cylinder of the supply chamber. A first guide path for guiding and dropping the virgin material from inside the tank, a second guide path for guiding and dropping the crushed material crushed by the crusher into a mixing tank of the mixer, and mixing in the mixing tank. A discharge path for discharging the crushed material and the virgin material to the outside of the mixing tank, wherein the mixer is a stirring rod for stirring and mixing the crushed material and the virgin material, Agitating blades protrude around the shaft A stirring rod is rotatably supported in the mixing tank and is formed, and the supply chamber is a screw conveyor for feeding the virgin material into the mixing tank, and a screw blade is helically formed around a rotating shaft. The wound screw conveyor is rotatably supported and formed in a cylindrical body communicating with the mixing tank, and the rotating shafts of the stirring rod and the screw conveyor are connected in series, and the combined rotating shaft is provided. And a driving means for rotating the.

[0007] In this pulverizing and mixing apparatus, the virgin material charged into the tank can be supplied into the cylinder of the supply chamber through the first guide path.

[0008] Further, the plastic pulverized material pulverized by the pulverizer can be supplied into the mixing tank of the mixer through the second guide path.

Further, the stirring shaft and the screw conveyor can be simultaneously rotated by rotating the rotating shafts connected in series by the driving means. Then, the virgin material supplied into the cylindrical body of the supply chamber can be fed into the mixing tank that is communicated with the cylindrical body by the rotating screw conveyor and into the mixing tank to which the plastic pulverized material is supplied. .

Then, the virgin material and the crushed material supplied into the mixing tank can be mixed by stirring with a rotating stirring rod.

The mixed crushed material and virgin material in the mixing tank can be discharged to the outside of the mixing tank through a discharge path. The plastic material obtained by mixing the crushed material and the virgin material can be used for molding various plastic products.

[0012] In the pulverizing and mixing apparatus of the present invention, it is preferable that the mixing tank has a structure in which the bottom surface is inclined downward toward the discharge path.

[0013] In this pulverizing and mixing apparatus, the bottom surface of the mixing tank inclined downward toward the discharge path is used to separate the mixed pulverized material and barge material in the mixing tank using gravity applied thereto. , Can be accurately slid down in the direction of the discharge path. Then, the plastic material obtained by mixing the crushed material and the virgin material can be smoothly and reliably discharged to the outside of the mixing tank through the discharge path.

In the crushing and mixing apparatus of the present invention, when the total amount of the crushed material and the virgin material in the mixing tank reaches a certain level or more, the driving means is stopped, and the crushed material and the virgin material in the mixing tank are stopped. It is preferable to provide a structure having a control means for driving the driving means when the total amount of the above becomes a certain level or less.

In this pulverizing and mixing apparatus, when the total amount of the pulverized material and the virgin material in the mixing tank reaches a certain level or more, the driving means is stopped by the control means, and the stirring rod and the screw conveyor are moved. Can be stopped simultaneously. Then, the supply of the virgin material sent from the supply chamber into the mixing tank can be temporarily stopped. At the same time, the driving of the crusher can be stopped, and the supply of the crushed material sent from the crusher into the mixing tank can be temporarily stopped. And it can prevent that the crushed material and the virgin material in the mixing tank are excessively increased. Conversely, when the total amount of the pulverized material and the virgin material in the mixing tank becomes equal to or less than a certain level, the control means drives the driving means to simultaneously rotate the stirring rod and the screw conveyor. Then, the virgin material can be supplied from the supply chamber into the mixing tank. At the same time, the pulverizer can be driven to supply the pulverized material from the pulverizer into the mixing tank. And it can prevent that the crushed material and the virgin material in the mixing tank are significantly reduced. Hereinafter, by repeating these operations, while maintaining the total amount of the crushed material and the virgin material in the mixing tank at a certain level, the plastic material obtained by mixing the crushed material and the virgin material from the mixing tank is mixed in the mixing tank. Supply to external plastic molding machines etc. can be continued without excess or shortage.

In the pulverizing / mixing apparatus of the present invention, immediately below the pulverized material discharge port of the pulverizer, adjacent to the second guide path,
By providing a waste path for the crushed material, swingably supporting the partition plate in the discharge port, and tilting the partition plate toward the second guide path side, the partition plate closes the second guide path, and The pulverized material discharged from the discharge port can be discharged to the waste path, and the partition plate is closed to the waste path side to close the waste path with the partition plate and the pulverized material discharged from the discharge port of the crusher. It is preferable that the structure is such that the material can be guided and dropped into the second guideway.

In this crushing and mixing apparatus, the partition plate can be tilted toward the second guide path, and the second guide path can be closed by the partition plate. Then, the crushed material discharged from the discharge port of the crusher can be discharged to the waste path. In addition, the partition plate can be moved down to the waste road side to close the waste road with the partition plate. Then, the pulverized material discharged from the discharge port of the pulverizer can be guided and dropped into the second guide path. Hereinafter, these operations can be performed as needed to adjust the amount of the pulverized material supplied from the pulverizer into the mixing tank of the mixer. Then, the mixing ratio of the crushed material and the virgin material to be stirred and mixed in the mixing tank can be adjusted.

[0018]

Next, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a preferred embodiment of a crushing and mixing apparatus of the present invention, and FIG.
FIG. 2 is a partial side sectional view thereof. Hereinafter, the pulverizing and mixing apparatus will be described.

In the figure, reference numeral 10 denotes a tank for charging a plastic virgin material, which is in the shape of an upright rectangular cylinder. The lower portion of the tank 10 is narrowed down to a small diameter in a funnel shape. The lower side wall of the tank 10 is provided with a viewing window 12 in which a transparent glass plate or the like is fitted. And
It is configured so that the amount of virgin material in the tank 10 can be confirmed through the viewing window 12.

Reference numeral 20 denotes a crusher for crushing plastic waste such as sprues and runners. The pulverizer 20 is arranged on the side of the tank 10 side by side with the tank 10. At the upper end of the crusher 20, a charging cylinder 22 for charging a substantially funnel-shaped waste material is provided upright.
Reference numeral 24 denotes an electric motor with a speed reducer 26 for rotating and driving a crushing blade 28 built in the crusher 20.

Reference numeral 30 denotes a mixer for mixing the plastic virgin material and the pulverized material pulverized by the pulverizer 20. The mixer 30 is disposed below the crusher 20. The mixer 30 is a stirring rod 34 for stirring and mixing the crushed material and the virgin material. The stirring rod 34 having a stirring blade 38 protruding around a rotating shaft 36 is provided in the mixing tank 3.
2 so as to be rotatably supported.

The mixing tank 32 has a shape in which a funnel-shaped cylindrical body is laid horizontally. And the bottom surface in the mixing tank 32 is
It is inclined downward toward a discharge path 60 described later. A stirring rod 34 is rotatably supported on a shaft portion of the mixing tank 32 which faces in the lateral direction. The stirring blade 38 has a comb blade shape.

Reference numeral 40 denotes a supply chamber for supplying the virgin material into the mixing tank 32. The supply chamber 40 is arranged below the tank 10. The supply chamber 40 is provided with a screw conveyor 44 for feeding the virgin material into the mixing tank 32.
And a screw conveyor 44 in which a screw blade 48 is spirally wound around a rotating shaft 46,
2 so as to be rotatably supported.

The cylindrical body 42 is laid horizontally, and one end of the cylindrical body 42 is connected to a small-diameter end portion of the mixing tank 32 having a funnel shape. And
The inside of the cylindrical body 42 and the inside of the mixing tank 32 communicate with each other. The screw conveyor 44 is rotatably supported by a shaft portion in the cylinder 42 that faces in the lateral direction.

The rotating shaft 36 of the stirring rod 34 and the rotating shaft 46 of the screw conveyor 44 are connected in series.
The rotating shafts 36 and 46 connected in series are configured to rotate simultaneously in conjunction with each other.

Reference numeral 50 denotes a rotating shaft 36, 4 connected in series.
6 is a driving means for rotating 6. Drive means 50
Is formed from an electric motor 54 with a speed reducer 52. Then, by the driving means 50, the rotating shafts 36, 46
Can be simultaneously rotated in the same direction.

Reference numeral 60 denotes a discharge path for discharging the mixed crushed material and virgin material in the mixing tank 32 to the outside of the mixing tank 32. The discharge path 60 is formed in a cylindrical shape, and protrudes from a lower end of a side wall that covers a large-diameter rear end portion of the funnel-shaped mixing tank 32 so as to communicate with the mixing tank 32. Then, the inner bottom surface of the mixing tank 32 inclined downward toward the discharge path 60 is smoothly moved in the direction of the discharge path 60 by using gravity applied to the crushed material and the virgin material mixed in the mixing tank 32. It is configured to be able to slide down.
The plastic material obtained by mixing the crushed material and the virgin material can be smoothly and reliably discharged to the outside of the mixing tank 32 through the discharge path 60.

Reference numeral 70 denotes a first guide path for guiding and dropping the virgin material in the tank 10 into the cylinder 42 of the supply chamber 40 disposed below the tank 10. The first guide path 70 has an upright cylindrical shape, and has an upper end communicating with a lower end in the tank 10 and a lower end communicating with an upper end in the cylindrical body 42.

Reference numeral 80 denotes a second guide path for guiding and dropping the plastic pulverized material pulverized by the pulverizer 20 into the mixing tank 32 of the mixer 30 disposed below the pulverizer 20. The second guide path 80 includes an inclined flat upper end side surface 82 of the mixing tank 32 located below the pulverized material discharge port 100 of the crusher 20, and a front end of the inclined flat upper end side face 82 of the mixing tank. And an introduction port 84 which is open to the outside. Then, the pulverized material discharged from the discharge port 100 of the pulverizer 20 is received by the inclined upper side surface 82 of the mixing tank 32, and the upper end side surface 82 can be guided and slide down in the inclined direction. Have been. Then, the pulverized material can be fed into the mixing tank 32 through an inlet 84 opened at the front end of the inclined upper side surface 82 of the mixing tank 32.

In addition, in the crushing and mixing apparatus shown in the figure, when the total amount of the crushed material and the virgin material in the mixing tank 32 reaches a certain level or more, the driving means 50 is stopped,
When the total amount of the pulverized material and the virgin material in the mixing tank 32 falls below a certain level, a control means 90 for driving the driving means 50 is provided. The control means 90 controls the mixing tank 32
A level sensor 92 installed in the mixing tank 32
A level sensor 92 for detecting the level of the total amount of the crushed material and the virgin material present in the inside, and an electronic circuit (not shown) for controlling the driving of the driving means 50 based on data detected by the level sensor 92 And is formed from

The crushing and mixing apparatus shown in FIGS. 1 and 2 is constructed as described above. In this crushing and mixing apparatus, the drive shaft 50 is used to connect the rotating shafts 3 connected in series.
6 and 46 can be simultaneously rotated, so that the stirring rod 34 supported in the mixing tank 32 and the screw conveyor 44 supported in the cylinder 42 can be simultaneously rotated. At the same time, by driving the electric motor 24 with the speed reducer 26, the crushing blade 28 built in the crusher 20 can be rotationally driven.

Into the tank 10, a granular plastic virgin material can be charged from its upper end. Then, the virgin material can be supplied into the cylinder 42 of the supply chamber 40 by sliding down and falling in the first guide path 70 communicating with the lower end of the tank 10. Then, the virgin material can be sent from the inside of the cylinder 42 of the supply chamber 40 into the mixing tank 32 communicating with the inside of the cylinder 42 by the rotating screw conveyor 44.

The plastic waste can be supplied to the pulverizer 20 through an input cylinder 22 provided at the upper end thereof. Then, the waste material can be pulverized into particles by the pulverizing blade 28 rotating in the pulverizer 20. Then, the pulverized material can be dropped onto the inclined upper end side surface 82 of the mixing tank 32 below the discharge port 100. Then, the crushed material can slide down the inclined upper side surface 82 of the mixing tank 32. Then, the pulverized material can be sent into the mixing tank 32 through an inlet 84 opened at the front end of the inclined upper side surface 82 of the mixing tank 32.

The mixing tank 32 is formed by the crusher 20 and the supply chamber 40.
The crushed material and the virgin material sent into the inside can be stirred and mixed in the mixing tank 32 by the rotating stirring rod 34.

The pulverized material and the barge material mixed in the mixing tank 32 are mixed with the mixing tank 32 inclined downward toward the discharge path 60.
The inner bottom surface is slid down and passed through the discharge passage 60 so that the mixing tank 3
2. Can be discharged outside. Then, a plastic material obtained by mixing the crushed material and the virgin material can be sent to a plastic molding machine or the like.

When the total amount of the crushed material and the virgin material in the mixing tank 32 reaches a certain level or more, the control means 9
With 0, the driving means 50 can be stopped and the rotation of the stirring rod 34 and the screw conveyor 44 can be stopped simultaneously. Then, the supply of the virgin material sent from the supply chamber 40 into the mixing tank 32 can be temporarily stopped. At the same time, the driving of the crusher 20 is stopped, and the supply of the crushed material sent from the crusher 20 into the mixing tank 32 can be temporarily stopped. Then, it is possible to prevent the total amount of the crushed material and the virgin material in the mixing tank 32 from excessively increasing. Conversely, when the total amount of the crushed material and the virgin material in the mixing tank 32 becomes equal to or less than a certain level, the control means 90 drives the driving means 50 to simultaneously rotate the stirring rod 34 and the screw conveyor 44. Can be done. Then, the virgin material can be supplied from the supply chamber 40 into the mixing tank 32. At the same time, the crusher 20 is driven so that the mixing tank 3
2 can supply the pulverized material. And it can prevent that the total amount of the crushed material and the virgin material in the mixing tank 32 is significantly reduced. Hereinafter, by repeating these operations, while maintaining the total amount of the crushed material and the virgin material in the mixing tank 32 at a constant level, the plastic material obtained by mixing the crushed material and the virgin material from the mixing tank 32 is removed. , Can be continuously supplied to a plastic molding machine installed outside the mixing tank 32 without excess or shortage.

FIG. 3 shows another preferred embodiment of the pulverizing / mixing apparatus of the present invention, and FIG. 3 is a partial side sectional view thereof.
Hereinafter, the pulverizing and mixing apparatus will be described.

In the crushing and mixing apparatus shown in FIG.
Immediately below the pulverized material discharge port 100, a pulverized material disposal path 110 is provided side by side with the second guide path 80. In the discharge port 100, a plate-like partition plate 120 is swingably supported.

Then, as shown by the solid line in the figure, the partition plate 120 is tilted toward the second guide path 80, so that the upper end of the second guide path 80 can be closed by the partition plate 120. ing. At the same time, the partition plate 120
As shown by a two-dot chain line in the figure, the partition plate 120 is configured so that the upper end of the waste path 110 can be closed by falling down to the waste path 110 side.

The other components are the same as those of the above-described pulverizing / mixing apparatus shown in FIGS. 1 and 2. In this pulverizing / mixing apparatus, the partitioning plate 120 is turned down to the second guide path 80 side, and At 120, the upper end of the second taxiway 80 can be closed. Then, the crushed material discharged from the discharge port 100 of the crusher can be discharged to the waste path 110. Then, the feeding of the pulverized material discharged from the discharge port 100 of the pulverizer into the mixing tank 32 through the second guide path 80 can be stopped.

Further, the partition plate 120 can be tilted toward the waste path 110, and the upper end of the waste path 110 can be closed by the partition plate 120. Then, the pulverized material discharged from the discharge port 100 of the pulverizer can be guided into the second guide path 80 and dropped. Then, the pulverized material can be sent into the mixing tank 32 through the second guide path 80. Hereinafter, these operations can be performed as needed to adjust the amount of the pulverized material supplied from the pulverizer 20 into the mixing tank 32 of the mixer. And
The mixing ratio of the crushed material and the virgin material to be stirred and mixed in the mixing tank 32 can be adjusted.

In the above-described pulverizing and mixing apparatus, the inner bottom surface of the mixing tank 32 is not inclined toward the discharge path 60,
The plastic material formed by mixing the crushed material and the virgin material stored in the mixing tank 32 may be formed in a horizontal plane shape, and the plastic material formed by mixing the virgin material with the virgin material may be passed through the discharge path 60 using the gravity applied thereto. It is possible to discharge to the outside of the mixing tank 32.

Further, without providing the control means 90, the drive means 50 is manually turned on and off by controlling the supply chamber 4
The supply amount of the virgin material fed into the mixing tank 32 from 0 may be adjusted, or the supply amount of the plastic material fed from the mixing tank 32 to a plastic molding machine or the like may be adjusted.

Further, without providing a waste path 110 adjacent to the second guide path 80 or swingably supporting the partition plate 120 in the pulverized material discharge port 100 of the pulverizer, The amount of the pulverized material fed from the pulverizer 20 into the mixing tank 32 may be adjusted by controlling ON / OFF of the electric motor 24 with the speed reducer 26.

[0045]

As described above, according to the crushing and mixing apparatus of the present invention, the number of electric motors for driving the apparatus can be greatly reduced, and the control circuit thereof can be greatly simplified.
It is possible to provide a pulverizing and mixing device whose operation and maintenance are easy.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a crushing and mixing apparatus of the present invention.

FIG. 2 is a partial side sectional view of the pulverizing / mixing device of the present invention.

FIG. 3 is a partial side sectional view of the pulverizing / mixing device of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 tank 12 viewing window 20 crusher 22 charging cylinder 30 mixer 32 mixing tank 34 stirring rod 36 rotation shaft 38 stirring blade 40 supply chamber 42 cylinder 44 screw conveyor 46 rotation shaft 48 screw blade 50 driving means 60 discharge path 70 first Guideway 80 Second guideway 84 Opening 90 Control means 92 Level sensor 100 Crusher discharge port of crusher 110 Waste path 120 Partition plate

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B29B ⁷ /00-7/94 B29B 17/00

Claims (4)

(57) [Claims] 1. A tank for charging a plastic virgin material, a crusher for crushing plastic waste material, and a mixer for mixing the virgin material crushed by the crusher with the virgin material, A mixer disposed below the machine, a supply chamber disposed below the tank, a first guide path for guiding and dropping a virgin material from inside the tank into a cylinder of the supply chamber, and the crusher A second guide path for guiding and dropping the crushed material into the mixing tank of the mixer, and a discharge path for discharging the mixed crushed material and virgin material in the mixing tank to the outside of the mixing tank. Wherein the mixing machine is a stirring rod for stirring and mixing the crushed material and the virgin material, and a stirring rod having a stirring blade protruding around a rotating shaft is rotated in the mixing tank. The supply chamber is formed so as to be freely supported. However, it is a screw conveyor for feeding the virgin material into the mixing tank, and a screw conveyor in which screw blades are spirally wound around a rotation shaft is rotatably inserted into a cylinder communicating with the mixing tank. A rotating shaft of the stirring rod and the screw conveyor, the rotating shaft of the stirring bar and the screw conveyor being connected in series, and a driving means for rotating the combined rotating shaft; . 2. The apparatus for crushing and mixing plastic materials according to claim 1, wherein the bottom surface of the mixing tank is inclined downward toward the discharge path. 3. When the total amount of the crushed material and the virgin material in the mixing tank reaches a certain level or more, the driving means is stopped, and the total amount of the crushed material and the virgin material in the mixing tank is less than a certain level. 3. The apparatus for crushing and mixing plastic materials according to claim 1, further comprising control means for driving said driving means when said condition is satisfied. 4. A second pulverizer is provided immediately below the pulverized material discharge port of the pulverizer.
Next to the guide path, a waste path for the crushed material is provided, a partition plate is swingably supported in the discharge port, and the partition plate is turned to the second guide path side, whereby the second guide path is formed by the partition plate. By closing, the crushed material discharged from the discharge port of the crusher can be discharged to the waste path, and the partition plate is closed to the waste path side, thereby closing the waste path with the partition plate and discharging the crusher. The crushed material discharged from the outlet can be guided and dropped into the second guide path.
Or a device for crushing and mixing plastic materials according to 3.