JPH09103704A - Crusher for recycling molding of plastic material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To crush a molding made of a plastic material, e.g. a heat molded sprue for a purpose of recycle. SOLUTION: A bottom 10 of a drum 3 enable to move with alternate rotations and sawtooth 7 housed in a housing 8 are alternately protruded into the drum 2. The machine for collapsing a plastic molding or a used container for recycle is inexpensive itself.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION This invention relates to molded articles made from plastic material, and more particularly, but not exclusively, to a shredding machine for breaking and then recycling rolls of thermoformed scrap. . Such machines are used for plastic moldings (pls) such as empty containers, bottles, etc.
Astics items) can also be shredded.

[0002]

BACKGROUND OF THE INVENTION Such machines for shredding plastic moldings such as thermoformed sprues already exist.
However, these machines use powerful mechanical components that waste energy, and the cost of operating such machines is very high. Roll of thermoforming waste (roll
l) is in the form of a cylinder with a diameter of 800 mm and a weight in the range of 10 to 20 kg. A conventional crusher capable of crushing the material in one shot is a machine that weighs 5 tons, occupies a floor space of 2 × 2 m and consumes 100 hp of electricity. Such devices are expensive,
Most companies cannot afford such an investment.

It is an object of the present invention that any thermoforming industry has about 2
It is to be able to obtain a device for crushing the thermoformed scrap collected in a large waste container of 32 m ³ containing only 000 kg or skips to an acceptable volume. Due to the very high use and transportation costs of this skip, as well as the disposal costs, this type of production waste poses a severe financial burden and is ecologically catastrophic. The present invention seeks to mitigate this drawback.

[0004]

SUMMARY OF THE INVENTION The design of the present invention is designed to automatically destroy material charged to the feed hopper without requiring the presence of an attendant. Items loaded into the machine will be crushed within minutes and when the destruction is complete, the machine will be automatically stopped by a preset timer. This occurs every time the sprue is discharged from the thermoforming machine, thereby saving space.

According to the invention, the machine comprises a tilted cylindrical drum mounted on a stand and having an alternatingly rotatable bottom, and at least one blade which is driven by a motor to rotate inside the drum. And the blade diameter is equal to half the diameter of the drum.

The present invention is based on the breaking capability of saw blades formed of tungsten carbide pellets, which requires relatively little power (less than 5 HP) to drive the machine. Alternating rotation of the bottom of the drum
The ing rotary motion can be obtained conventionally through a motor and step down gear unit or by a rack and pinion assembly driven by a pneumatic actuator.

According to another feature of the invention, the saw blade is mounted for rocking inside a housing located at the bottom of the drum. The blade is secured to a motor which is pivoted about a horizontal axis so that the blade is horizontal in the rest state and is received by the housing without digging into the plastic material. The blade is thus retracted, which makes it possible to start the machine under no load. In contrast, as soon as the bottom of the drum begins to move, the blade rocks so that it is tilted with respect to the bottom of the drum. This blade crushes any material in the first ring on the bottom of the drum. Then, after reversing the rotational movement of the bottom of the drum, the blade rocks in the opposite direction to the bottom of the drum, crushing the material in the second ring. The crushed waste is sucked through the central tube by a centrifugal suction fan. This centrifugal suction fan sucks waste in the form of sawdust-paper beads and sends it to a cyclone for separating air from the treated waste.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the invention are:
It will be apparent from the following description of specific embodiments, given by way of non-limiting example only, with reference to the accompanying drawings. FIG. 1 is a schematic view of the machine of the present invention. FIG. 2 is an elevational view of a shredder motor. FIG.
FIG. 6 is a diagram showing how to attach a motor to the machine. FIG. 4 is a diagram illustrating a method in which the bottom of the drum is swept by a saw blade. FIG. 5 shows a modification of the machine designed especially for plastic containers such as bottles.

[0009]

1 shows a machine with a stand 1 standing on the ground. The stand 1 has a processing drum 2
Are inclined at about 60 °, and the processing drum 2 functions to receive a molded product made of a plastic material to be cut (broken). Due to the inclination,
The moldings loaded on top of the drum will automatically descend under gravity. The drum is closed by a lid 3 hinged to a side rail 4 having the other end fixed to a stand 1.
The drum 2 is supported by a rail 4 via an arm 5. Below the drum 2, a motor 6 for driving a saw blade 7 inside a housing 8 formed at the bottom of the drum 2 is provided. The housing 8 and consequently the motor and the saw blade 7 all rotate with the central part of the bottom of the drum 2 which corresponds to the duct 9 (the function of which will be explained below). The duct 9 is fixed to the bottom portion 10 of the drum 2 which is provided so as to rotate with respect to the side wall thereof. For this purpose, the duct 9 rotates on bearings 11 fixed to the stand 1.

In the example shown, the duct 9 is driven in alternating motion by a toothed wheel 12 engaged in an assembly with a rack driven by a pneumatic actuator 13. For example, any other drive means such as a motor and gearbox unit could be used instead. The hollow duct 9 has at its lower end a horizontal duct 14 connected to a fan 15, which sucks out the shredded material by suction and, as indicated by the arrow F, a cyclone (not shown) or another separation. It can be sent to a device, from which the substance, which is actually in powder form, can be sent to a container for transport to a location for recycling.

FIG. 2 shows how to mount the motor 6.
The motor 6 is hinged to the stand 1 around a shaft 16. The drive shaft carries a saw blade 7, which, according to the invention, can assume three positions which are adjustable as a function of the motor casing. When the casing is vertical, the blades 7 are horizontal and are housed in the housing such that the power supply to the motor does not act on the plastic molding that remains on the top of the housing. This is the starting position,
In this position, the motor rotates with no load. The body of the motor is fixed to the plate 17. Formed in this plate are three small pneumatic actuators 18, each of which has a rod which constitutes a finger (not shown) which can enter a hole 19 in the support 17. Each finger terminates in a conical end which is slidable within a corresponding hole 19 to automatically center the support. Depending on which finger penetrates the hole, the motor 6 takes a positive, zero or negative tilt with respect to the vertical axis. Which finger is selected depends on the direction of displacement of the actuator, i.e. the direction in which the moving bottom 10 is rotated, the appropriate connection being made by automatic means.

As can be seen in FIGS. 2 and 3, the saw blade 7 is actually constituted by a hub 20, which carries two circular saw blades 21 and 22 screwed onto it. . In FIG. 2, the rest position is shown in solid lines and the other two positions are shown in broken lines. FIG. 3 is a plan view of the motor assembly showing the pneumatic actuator 13 and the rack 23, which meshes with a toothed wheel secured to the discharge tube 9. In addition, a motor support 17 pivotally attached to a shaft 16 that can swing with respect to the stand
And saw blades 21 and 22 are shown.

Please refer to FIG. 4, which is a geometrical diagram showing how a saw having a diameter smaller than the diameter of the bottom of the drum 2 can be used to sweep the entire surface area of the bottom of the drum 2 in accordance with the present invention. The cutting action performed by the saw blades 21 and 22 will be described. First, the moving bottom rotates counterclockwise. Similarly, swing the motor counterclockwise, resulting in
The blade 21 projects above the housing 8 by about 2 cm.
The motor 6 rotates at about 3000 rpm and the bottom of the drum rotates at about 10 rpm. Under such conditions, sector 21A sweeps outer ring 25 and breaks any material that presses against this ring into debris.

After the bottom of the drum 2 has made a full revolution, and perhaps 380 ° in effect, the movements of the actuator 13 and the rack 23 are reversed. The bottom then rotates clockwise. The position of the motor 6 is sector 21
A is returned into the housing 8 and is altered by the actuator 18 so that the sector 21B projects from the housing 8. As before, the motor 6 continues to rotate in the same direction, with the sector 22 sweeping the inner ring 26 at the bottom of the drum, shredding material in this area and removing the crushed material into small pieces via the duct 9. . These actions continue until all the material in the drum is crushed. The time required for crushing is set by a timer (not shown), and the timer is started by closing the lid 3. For safety reasons, the shredder of the invention only works when the lid is closed.

Once the crusher is loaded, a break cycle is initiated, which break cycle occurs as follows. That is, close the lid (for safety). Turn on the crusher. The electric motor that drives the saw starts. The saw blade moves by an amount that defines the cutting height (this height is adjustable). Rotate the bottom of the drum through an angle ranging from 360 ° to 380 °. Withdraw the blade into its housing. Extend the blade diametrically opposite by the same amount. Rotate the bottom of the drum in the opposite direction from 360 ° to 380 °
Turn over an angle of °.

FIG. 5 shows a variant of the crusher according to the invention, which is especially intended for plastic containers such as bottles. In this case, the lid 3 of the drum 2 is closed and remains closed. The lid supports an insertion hopper or chute 27, and by this insertion hopper or chute 27,
It is possible to insert a plastic molded product having a diameter determined by its diameter. As soon as the drum 2 is full, the sensor indicated by the line 29 gives a signal. Then, the motor 6 operates to shred the molded product to be recycled. In order not to allow any fragments of shreds to escape, preferably,
Inside the inclined chute 27, a flap 28 that prevents backflow
Is provided. Of course, numerous modifications can be made without departing from the scope of the invention, in particular by configuring equivalent technical means.

[Brief description of the drawings]

FIG. 1 is a schematic view of a machine of the present invention.

FIG. 2 is an elevational view of a shredder motor.

FIG. 3 is a diagram showing how to attach a motor to a machine.

FIG. 4 is a diagram illustrating a method in which the bottom of the drum is swept by a saw blade.

FIG. 5 shows a variant of the machine designed especially for plastic containers such as bottles.

[Explanation of symbols]

 1 Stand 2 Drum 3 Lid 6 Motor 7 Saw Blade 8 Housing 9 Duct 10 Drum Bottom 12 Toothed Wheel 13 Pneumatic Actuator 14 Horizontal Duct 15 Fan 18 Pneumatic Actuator 19 Orifice 20 Hub 23 Rack 27 Hopper 29 Sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 595159312 Devropman-Reduxillon-Rekyu Perasillon-Les Clages-Levallorizasyon "De 4 L" (Ess.Ale.Ale.El.) ECYCLAGE-REVALORISA TION "D4R" (SAR RL) France 02400 Château Tieria Vigne de Rouleux es Say de la Plaine (no address) (72) Inventor Morrow Pierre France 57600 Forbach Lude Verdun 35 ar

Claims (8)

[Claims] 1. A machine for crushing molded articles made of plastic material, comprising a stand (1) for supporting a cylindrical drum (2) having a bottom part (10) movable by alternating rotation, the inside of the drum being provided. With at least one saw (7)
Is rotatably mounted, the saw being driven by a motor (6) and the saw blade (7) having a diameter equal to half the diameter of the drum (2). A machine for crushing molded products. 2. A saw (7) is provided in a housing (8) formed at the bottom of a drum, the blade of which is a motor () which is arranged to swing about a horizontal axis (16). The machine for crushing a molded article of a plastic material according to claim 1, wherein the machine is provided on the shaft of 6). 3. Saw according to claim 1 or 2, characterized in that the saw (7) is constituted by a hub (20) having two circular saw blades (21, 22) screwed on both sides. A machine for crushing plastic products. 4. A rack (2) whose bottom (10) meshes with a toothed wheel fixed to a hollow duct (9).
Pneumatic actuator (13) fixed to 3)
2. The driving is performed by alternating rotation by
A machine for crushing the molded article of the plastic material described in. 5. The drive motor (6) for the saw (7) is characterized in that the rod is swung horizontally by means of a small hole (19) in the motor support (17). A machine for crushing a molded article of the plastic material according to any one of 1 to 4. 6. Molded article of plastics material according to claim 3, characterized in that the teeth (21, 22) project alternately above the housing (8) as a function of the direction of rotation of the moving bottom (10). Machine for crushing. 7. Machine for crushing molded articles of plastics according to any one of claims 1 to 6, characterized in that the machine is put into operation by closing the lid (3). 8. The lid (3) comprises a hopper (27) for inserting a molding and a sensor for indicating when the drum is full.
A machine for crushing a molded article of the plastic material according to any one of 1.