CA1335033C - Apparatus for reclaiming plastic - Google Patents
Apparatus for reclaiming plasticInfo
- Publication number
- CA1335033C CA1335033C CA 606653 CA606653A CA1335033C CA 1335033 C CA1335033 C CA 1335033C CA 606653 CA606653 CA 606653 CA 606653 A CA606653 A CA 606653A CA 1335033 C CA1335033 C CA 1335033C
- Authority
- CA
- Canada
- Prior art keywords
- plastic
- plastic waste
- perforated disk
- piston
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
- B29C48/388—Plasticisers, homogenisers or feeders comprising two or more stages using a screw extruder and a ram or piston
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
An apparatus for reclaiming plastic. The apparatus has a feed mechanism for supplying plastic waste to a compaction mechanism in which the plastic waste can be compacted. A heating mechanism supplies heat to the compaction mechanism, with the compacted and heated-up plastic waste leaving the compaction mechanism as reclaimed plastic that passes through a perforated disk.
Description
1 335~33 Background of the Invention The present invention relates to an apparatus or reclaiming plastic.
During the mass production of small plastic components, such as switch housings, switches, and many other accessories, which are used, for example, in the motor vehicle industry, a not inconsiderable amount of plastic waste is produced during the manufacture, for example with the use of a known plastic injection molding process. In principle, this plastic waste represents a valuable source of raw material, that up to now has been treated as waste or scrap, and has either been dumped or burned.
However, large vehicle components, for example the bumpers at the front and rear of a vehicle, have increasingly been made of plastie instead of metal.
These plastic eomponents, in eontrast, for example, to an automobile body, which is generally made of metal, are not subject to natural eorrosion or an environmentally-related abrasion; rather, these plastic components generally remain unchanged during the normal service life of a vehicle. These large plastic components in the vehicle industry, and also in other manufacturing areas for other components, increasingly represent a significant disposal - 1 - ~
problem.
In principle, not only plastic waste that is produced during the manufacture of plastic components, but also for plastic articles that are no longer used, represent a significant source of raw material that up to now was, to a large extent, not used, since on the one hand the necessity for reuse was not recognized, and on the other hand adequate methods and apparatus were not available in order to be able to economically convert the plastic waste into a reusable form.
It is therefore an object of the present invention to provide an apparatus with which, in an economical manner, plastic waste can be converted into a form that permits an unlimited reuse as plastic raw material and that is straightforward in construction and easy and economical to produce.
Brief Description of the Drawings This object, and other ob;ects and advan~ages of the present invention, will appear more clearly from the following specification in conjunction with the accompanying schematic drawings, in which:
Fig. 1 is a cross-sectional view of a first exemplary embodiment of the inventive apparatus for reclaiming plastic, in which merely the ~ 1 335033 compaction cylinder is provided with heating mechanisms; and Fig. 2 is a cross-sectional view of a second exemplary embodiment of the inventive apparatus for reclaiming plastic, with the plastic feed zone to the feed mechanism additionally being provided with a heating mechanism.
Summary of the Invention The apparatus of the present invention comprises: a feed mechanism for receiving plastlc waste and conveying it further; a compaction mechanism for receiving plastic waste from the feed mechanism, with the compaction mechanism being provided with means to compact the plastic waste;
first heating means for supplying heat to the compaction mechanism to warm plastic waste located therein; and a perforated disk disposed at a discharge location of the compaction mechanism for the discharge of compacted and heated-up plastic waste therefrom as reclaimed plastic.
The advantage of the inventive apparatus is essentially that in principle a first reduction in volume of the plastic waste can take place via a preliminary reduction in size by the feed mechanism, that subsequently the precompacted plastic waste can be further compacted by suitable means, and that in so doing the compacted plastic waste is heated to such an extent that it can pass through a perforated disk in the form of individual plastic strands that permit a further processing as reclaimed plastic that can be used as raw material.
Pursuant to one advantageous specific embodiment of the present invention, a feed mechanism is in the form of a driven worm conveyer, and is provided with a hopper for the supply o plastic waste. The hopper is oriented essentially perpendicular to the axis of rotation of the worm conveyer, so that any plastic waste that is introduced into the hopper, and that possibly has been previously mechanically reduced in size to pieces that can be accommodated, can be taken along by the worm conveyer, can be precompacted, and can subsequently be fed to the compaction mechanism.
In order to make the plastic waste parts that are fed via the hopper to the feed mechanism, and that can have a considerable material-related strength at normal temperature, more precompactable and easier to transport through the worm conveyer, it is proposed pursuant to another advantageous specific embodiment of the inventive apparatus, that 1 335~33 the feed mechanism be provided with a heating mechanism for supplying heat thereto; this heating mechanism can, for example, be disposed about that portion of the hopper where it opens into the worm conveyer.
The compaction mechanism itself preferably includes a cylinder and a piston that is movably disposed therein, so that the precompacted plastic waste coming from the worm conveyer can be compacted still further.
Compaction of the plastic waste in the compaction mechanism is effected by moving the piston, advantageously via any desirable pressure medium, in the direction toward the perforated disk.
The pressure medium can be a gas, for example air, or also a hydraulic fluid. Furthermore, it is similarly conceivable to move the piston in the direction of the perforated disk, and back, via, or example, a threaded spindle that is suitably connected to the piston.
During actuation of the piston via a pressure medium, the piston can preferably be conveyed via spring action into an end position that is remote from the perforated disk. However, it is also conceivable to convey the piston into the starting or end position, after compaction has been carried 1 33~033 out, via a pressure medium that is introduced into that space of the cylinder in which the compaction of the plastic waste took place.
In order to heat the cylinder, and hence the plastic waste, and to convert the plastic waste as much as is possible into a viscous state for the subsequent compaction, after the plastic waste, that has been precompacted by the worm conveyer and has possibly already been preheated, leaves the feed mechanism, the compaction mechanism advantageously includes a second heating means that is essentially disposed in that region where the feed mechanism opens out or discharges into the compaction mechanism. This embodiment of the inventive apparatus furthermore permit~ a more uniform hea~ing of that portion of the cylinder that is primarily used to carry out the final compaction process of the plastic waste.
Finally, the apparatus is preferably provided on the downstream side of the perforated disk with a device for reducing the size of the reclaimed plastic. Thus, for example, the length of the plastic strands that leave the perforated disk could be cut to any desired size so that it is precut to a suitable length for some specialized use.
The size-reducing mechanism is finally ' 1 335033 advantageously formed by a motor-driven rotating cutting means, such as a blade. However, it should be noted that the size-reducing mechanism can also be formed by any other suitable size-reducing means.
Further specific features of the present invention will be described in detail subse~uently.
Description of Preferred Embodiments Referring now to the drawings in detail, the apparatus 10 essentially comprises a feed mechanism 11 and a compaction mechanism 13. The feed mechanism 11 is provided with a discharge opening 24 to permit entry of precompacted plastic waste 12 into the compaction mechanism 13.
In the illustrated embodiment, the feed mechanism 11 essentially comprises a cylindrical casing portion in which is disposed a worm conveyer 17 of known construction that rotates about a shaft.
The worm conveyer 17 is driven about its shaft in a known manner by means of a motor, for example an electric motor, that is connected to the conveyer shaft. Mounted above the casing of the eed mechanism 11, essentially perpendicular to the axis of rotation of the worm conveyer 17, is a hopper 18 through which the plastic waste 12 can be fed to the worm conveyer 17.
The compaction mechanism 13 essentially 1 3350~3 comprises a cylinder 20, the casing of which is connected essentially perpendicularly to the feed mechanism 11. Provided at a suitable location on the side of the cylinder 20 is a hole that forms the aforementioned discharge opening 24 of the feed mechanism 11. One end of the cylinder 20, namely the upper end with the vertical orientation of the cylinder 20 as illustrated in the drawings, is provided with a closure means 27 in the form of a cover, with the vertically lower end of the cylinder 20 being provided with a conically tapered portion 28 of the cylinder body. Disposed at that part of the conically tapered portion 28 that has the smallest diameter is a perorated disk 15, which can, for example, be interchangeable.
Disposed essentially parallel to and at a distance from the perforated disk 15 in the direction of the discharge of the reclaimed plastic 16 from the apparatus 10 is a size-reducing mechanism 25 that is driven by a motor, for example an electric motor. The portion of the apparatus 10 about the perforated disk 15, in an extension of the cylinder 20, is formed by a tubular portion 29, at the discharge end of which is disposed an end flange 30 about which rotates a cutting means 26, for example a blade, that is driven by the size-reducing 1 3~5033 mechanism 25.
Disposed in the cylinder 20 is a piston 21 that can move back and forth, i.e. in the illustrated embodiment can move up and down in a vertical direction. By means of a piston rod 31 that is connected to the piston 21, the piston is guided at least partially in the upper closure means 27 of the cylinder 20. By means of a connection 32 in the closure means 27, a pressure medium, for example a gas or a hydraulic fluid, can be introduced into the first cylinder space 33, so that the piston 21 can move in the direction of the arrow 35 against the force of a spring 22. I the supply o a pressure medium to the first cylinder space 33 is interrupted, and the pressure medium disposed in this cylinder space is again withdrawn via the connection 32, the piston 21 again reaches its vertically upper position in the cylinder 20 under the influence of the spring 22.
A first heating mechanism 14, and a second heating mechanism 23 that is spaced therefrom, are provided about that portion of the cylinder 20 that forms a lower portion thereof when the cylinder 20 has a vertical orientation; these heating mechanisms 14, 23 can, for example, encircle the cylinder 20.
The heating mechanisms 14 and 23 can, for example, be electrically heated, although it is also conceivable to use any other available heat source therefore, such as waste heat.
Disposed about that portion of the hopper 18 that forms a lower portion thereof when the apparatus 10 has a vertical orientation, is a similar heating mechanism 19 that can similarly be operated either electrically or with any other energy that is available.
During the production of reclaimed plastic 16, the plastic waste 12 is first fed to the apparatus 10 via the hopper 18. In this connection, the plastic waste 12 can appropriately have been previously reduced in size, either mechanically or in any other suitable manner, to such an extent that the plastic waste can be received by the hopper 18.
By means of a heating mechanism 19, which can be provided in the lower region of the hopper, the supplied plastic waste 12 is heated up and is subsequently precompacted via the motor-driven worm conveyer 17 and is conveyed to the discharge opening 24 in the cylinder 20. The precompacted and heated-up plastic waste 12 then drops into the lower space 34 of the cylinder 20, where it is further heated up by the heating mechanism 14; in this connection, as previously mentioned, a further heating mechanism -1 335~33 23 can be provided in the immediate vicinity of the discharge opening 24.
After a sufficient quantity of precompacted and preheated plastic waste 12 is present in the lower portion of the cylinder 20, the piston 21, as described above, is moved downwardly via a pressure medium in the direction o~ the arrow 35, thus compacting the plastic waste 12 located in the second cylinder space 34 in a designated manner; at the same time, the plastic waste 12 is heated up still further by the heating mechanisms 23 and 14.
The viscous, precompacted plastic waste material 12 is guided via the conical tapered portion 28 of the cylinder 20 to the perforated disk 15, through which the plastic material is pressed. The individual strands of reclaimed plastic 16 that leave the perorated disk 15 can then be cut by the size-reducing mechaniæm 25 to a specific suitable length, depending upon need and application.
It should be noted that the feed cycle of plastic waste 12 to the apparatus 10, and the compacting cycle via the piston 21, can be automatically controlled in a suitable manner, so that in principle the apparatus 10 can be entirely automatically operated.
The present invention is, of course, in no way restricted to the specific disclosure of the specification and drawings, but also encompasses any modifications within the scope o the appended claims.
During the mass production of small plastic components, such as switch housings, switches, and many other accessories, which are used, for example, in the motor vehicle industry, a not inconsiderable amount of plastic waste is produced during the manufacture, for example with the use of a known plastic injection molding process. In principle, this plastic waste represents a valuable source of raw material, that up to now has been treated as waste or scrap, and has either been dumped or burned.
However, large vehicle components, for example the bumpers at the front and rear of a vehicle, have increasingly been made of plastie instead of metal.
These plastic eomponents, in eontrast, for example, to an automobile body, which is generally made of metal, are not subject to natural eorrosion or an environmentally-related abrasion; rather, these plastic components generally remain unchanged during the normal service life of a vehicle. These large plastic components in the vehicle industry, and also in other manufacturing areas for other components, increasingly represent a significant disposal - 1 - ~
problem.
In principle, not only plastic waste that is produced during the manufacture of plastic components, but also for plastic articles that are no longer used, represent a significant source of raw material that up to now was, to a large extent, not used, since on the one hand the necessity for reuse was not recognized, and on the other hand adequate methods and apparatus were not available in order to be able to economically convert the plastic waste into a reusable form.
It is therefore an object of the present invention to provide an apparatus with which, in an economical manner, plastic waste can be converted into a form that permits an unlimited reuse as plastic raw material and that is straightforward in construction and easy and economical to produce.
Brief Description of the Drawings This object, and other ob;ects and advan~ages of the present invention, will appear more clearly from the following specification in conjunction with the accompanying schematic drawings, in which:
Fig. 1 is a cross-sectional view of a first exemplary embodiment of the inventive apparatus for reclaiming plastic, in which merely the ~ 1 335033 compaction cylinder is provided with heating mechanisms; and Fig. 2 is a cross-sectional view of a second exemplary embodiment of the inventive apparatus for reclaiming plastic, with the plastic feed zone to the feed mechanism additionally being provided with a heating mechanism.
Summary of the Invention The apparatus of the present invention comprises: a feed mechanism for receiving plastlc waste and conveying it further; a compaction mechanism for receiving plastic waste from the feed mechanism, with the compaction mechanism being provided with means to compact the plastic waste;
first heating means for supplying heat to the compaction mechanism to warm plastic waste located therein; and a perforated disk disposed at a discharge location of the compaction mechanism for the discharge of compacted and heated-up plastic waste therefrom as reclaimed plastic.
The advantage of the inventive apparatus is essentially that in principle a first reduction in volume of the plastic waste can take place via a preliminary reduction in size by the feed mechanism, that subsequently the precompacted plastic waste can be further compacted by suitable means, and that in so doing the compacted plastic waste is heated to such an extent that it can pass through a perforated disk in the form of individual plastic strands that permit a further processing as reclaimed plastic that can be used as raw material.
Pursuant to one advantageous specific embodiment of the present invention, a feed mechanism is in the form of a driven worm conveyer, and is provided with a hopper for the supply o plastic waste. The hopper is oriented essentially perpendicular to the axis of rotation of the worm conveyer, so that any plastic waste that is introduced into the hopper, and that possibly has been previously mechanically reduced in size to pieces that can be accommodated, can be taken along by the worm conveyer, can be precompacted, and can subsequently be fed to the compaction mechanism.
In order to make the plastic waste parts that are fed via the hopper to the feed mechanism, and that can have a considerable material-related strength at normal temperature, more precompactable and easier to transport through the worm conveyer, it is proposed pursuant to another advantageous specific embodiment of the inventive apparatus, that 1 335~33 the feed mechanism be provided with a heating mechanism for supplying heat thereto; this heating mechanism can, for example, be disposed about that portion of the hopper where it opens into the worm conveyer.
The compaction mechanism itself preferably includes a cylinder and a piston that is movably disposed therein, so that the precompacted plastic waste coming from the worm conveyer can be compacted still further.
Compaction of the plastic waste in the compaction mechanism is effected by moving the piston, advantageously via any desirable pressure medium, in the direction toward the perforated disk.
The pressure medium can be a gas, for example air, or also a hydraulic fluid. Furthermore, it is similarly conceivable to move the piston in the direction of the perforated disk, and back, via, or example, a threaded spindle that is suitably connected to the piston.
During actuation of the piston via a pressure medium, the piston can preferably be conveyed via spring action into an end position that is remote from the perforated disk. However, it is also conceivable to convey the piston into the starting or end position, after compaction has been carried 1 33~033 out, via a pressure medium that is introduced into that space of the cylinder in which the compaction of the plastic waste took place.
In order to heat the cylinder, and hence the plastic waste, and to convert the plastic waste as much as is possible into a viscous state for the subsequent compaction, after the plastic waste, that has been precompacted by the worm conveyer and has possibly already been preheated, leaves the feed mechanism, the compaction mechanism advantageously includes a second heating means that is essentially disposed in that region where the feed mechanism opens out or discharges into the compaction mechanism. This embodiment of the inventive apparatus furthermore permit~ a more uniform hea~ing of that portion of the cylinder that is primarily used to carry out the final compaction process of the plastic waste.
Finally, the apparatus is preferably provided on the downstream side of the perforated disk with a device for reducing the size of the reclaimed plastic. Thus, for example, the length of the plastic strands that leave the perforated disk could be cut to any desired size so that it is precut to a suitable length for some specialized use.
The size-reducing mechanism is finally ' 1 335033 advantageously formed by a motor-driven rotating cutting means, such as a blade. However, it should be noted that the size-reducing mechanism can also be formed by any other suitable size-reducing means.
Further specific features of the present invention will be described in detail subse~uently.
Description of Preferred Embodiments Referring now to the drawings in detail, the apparatus 10 essentially comprises a feed mechanism 11 and a compaction mechanism 13. The feed mechanism 11 is provided with a discharge opening 24 to permit entry of precompacted plastic waste 12 into the compaction mechanism 13.
In the illustrated embodiment, the feed mechanism 11 essentially comprises a cylindrical casing portion in which is disposed a worm conveyer 17 of known construction that rotates about a shaft.
The worm conveyer 17 is driven about its shaft in a known manner by means of a motor, for example an electric motor, that is connected to the conveyer shaft. Mounted above the casing of the eed mechanism 11, essentially perpendicular to the axis of rotation of the worm conveyer 17, is a hopper 18 through which the plastic waste 12 can be fed to the worm conveyer 17.
The compaction mechanism 13 essentially 1 3350~3 comprises a cylinder 20, the casing of which is connected essentially perpendicularly to the feed mechanism 11. Provided at a suitable location on the side of the cylinder 20 is a hole that forms the aforementioned discharge opening 24 of the feed mechanism 11. One end of the cylinder 20, namely the upper end with the vertical orientation of the cylinder 20 as illustrated in the drawings, is provided with a closure means 27 in the form of a cover, with the vertically lower end of the cylinder 20 being provided with a conically tapered portion 28 of the cylinder body. Disposed at that part of the conically tapered portion 28 that has the smallest diameter is a perorated disk 15, which can, for example, be interchangeable.
Disposed essentially parallel to and at a distance from the perforated disk 15 in the direction of the discharge of the reclaimed plastic 16 from the apparatus 10 is a size-reducing mechanism 25 that is driven by a motor, for example an electric motor. The portion of the apparatus 10 about the perforated disk 15, in an extension of the cylinder 20, is formed by a tubular portion 29, at the discharge end of which is disposed an end flange 30 about which rotates a cutting means 26, for example a blade, that is driven by the size-reducing 1 3~5033 mechanism 25.
Disposed in the cylinder 20 is a piston 21 that can move back and forth, i.e. in the illustrated embodiment can move up and down in a vertical direction. By means of a piston rod 31 that is connected to the piston 21, the piston is guided at least partially in the upper closure means 27 of the cylinder 20. By means of a connection 32 in the closure means 27, a pressure medium, for example a gas or a hydraulic fluid, can be introduced into the first cylinder space 33, so that the piston 21 can move in the direction of the arrow 35 against the force of a spring 22. I the supply o a pressure medium to the first cylinder space 33 is interrupted, and the pressure medium disposed in this cylinder space is again withdrawn via the connection 32, the piston 21 again reaches its vertically upper position in the cylinder 20 under the influence of the spring 22.
A first heating mechanism 14, and a second heating mechanism 23 that is spaced therefrom, are provided about that portion of the cylinder 20 that forms a lower portion thereof when the cylinder 20 has a vertical orientation; these heating mechanisms 14, 23 can, for example, encircle the cylinder 20.
The heating mechanisms 14 and 23 can, for example, be electrically heated, although it is also conceivable to use any other available heat source therefore, such as waste heat.
Disposed about that portion of the hopper 18 that forms a lower portion thereof when the apparatus 10 has a vertical orientation, is a similar heating mechanism 19 that can similarly be operated either electrically or with any other energy that is available.
During the production of reclaimed plastic 16, the plastic waste 12 is first fed to the apparatus 10 via the hopper 18. In this connection, the plastic waste 12 can appropriately have been previously reduced in size, either mechanically or in any other suitable manner, to such an extent that the plastic waste can be received by the hopper 18.
By means of a heating mechanism 19, which can be provided in the lower region of the hopper, the supplied plastic waste 12 is heated up and is subsequently precompacted via the motor-driven worm conveyer 17 and is conveyed to the discharge opening 24 in the cylinder 20. The precompacted and heated-up plastic waste 12 then drops into the lower space 34 of the cylinder 20, where it is further heated up by the heating mechanism 14; in this connection, as previously mentioned, a further heating mechanism -1 335~33 23 can be provided in the immediate vicinity of the discharge opening 24.
After a sufficient quantity of precompacted and preheated plastic waste 12 is present in the lower portion of the cylinder 20, the piston 21, as described above, is moved downwardly via a pressure medium in the direction o~ the arrow 35, thus compacting the plastic waste 12 located in the second cylinder space 34 in a designated manner; at the same time, the plastic waste 12 is heated up still further by the heating mechanisms 23 and 14.
The viscous, precompacted plastic waste material 12 is guided via the conical tapered portion 28 of the cylinder 20 to the perforated disk 15, through which the plastic material is pressed. The individual strands of reclaimed plastic 16 that leave the perorated disk 15 can then be cut by the size-reducing mechaniæm 25 to a specific suitable length, depending upon need and application.
It should be noted that the feed cycle of plastic waste 12 to the apparatus 10, and the compacting cycle via the piston 21, can be automatically controlled in a suitable manner, so that in principle the apparatus 10 can be entirely automatically operated.
The present invention is, of course, in no way restricted to the specific disclosure of the specification and drawings, but also encompasses any modifications within the scope o the appended claims.
Claims (8)
1. Apparatus for the production of regenerated plastic which includes, in combination;
(a) feeding means for feeding plastic waste in a generally solid, particulate state to a compacting device;
(b) said compacting device for compacting said plastic waste comprises a cylinder and a piston that is movably disposed in said cylinder;
(c) said compacting device is provided with first and second heating means adapted to supply heat to the compacting device;
(d) said second heating means being located in the general area of the vicinity of the discharge outlet of the said feeding device into the compacting device; and (e) a perforated disk disposed at a discharge location of said compacting device for the discharge of compacted and heated-up plastic waste therefrom as reclaimed plastic.
(a) feeding means for feeding plastic waste in a generally solid, particulate state to a compacting device;
(b) said compacting device for compacting said plastic waste comprises a cylinder and a piston that is movably disposed in said cylinder;
(c) said compacting device is provided with first and second heating means adapted to supply heat to the compacting device;
(d) said second heating means being located in the general area of the vicinity of the discharge outlet of the said feeding device into the compacting device; and (e) a perforated disk disposed at a discharge location of said compacting device for the discharge of compacted and heated-up plastic waste therefrom as reclaimed plastic.
2. Apparatus of claim 1, wherein said feeding means includes heating means operatively associated with the feeding means to supply heat thereto.
3. Apparatus of claim 1, wherein the feeding means is adapted to pre-compact the plastic waste.
4. Apparatus of one of claims 1, 2 or 3, wherein said piston is movable in a direction toward said perforated disk under the effect of pressure medium.
5. Apparatus of one of claims 1, 2 or 3, which includes spring means for conveying said piston into an end position that is remote from said perforated disk.
6. Apparatus as claimed in claim 4, which includes spring means for conveying said piston into an end position that is remote from said perforated disk.
7. Apparatus of claim 1, which includes a size-reducing mechanism disposed downstream of said perforated disk for reducing the size of said reclaimed plastic as the same is discharged from said perforated disk.
8. Apparatus of claim 7, in which the size reducing mechanism is a motor driven rotating blade.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19883828662 DE3828662A1 (en) | 1988-08-24 | 1988-08-24 | DEVICE FOR PRODUCING PLASTIC REGENERATE |
| DEP3828662.9 | 1988-08-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1335033C true CA1335033C (en) | 1995-04-04 |
Family
ID=6361469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 606653 Expired - Fee Related CA1335033C (en) | 1988-08-24 | 1989-07-26 | Apparatus for reclaiming plastic |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0357880B1 (en) |
| JP (1) | JPH066291B2 (en) |
| CN (1) | CN1030696C (en) |
| AT (1) | ATE109714T1 (en) |
| BR (1) | BR8904251A (en) |
| CA (1) | CA1335033C (en) |
| DD (1) | DD283968A5 (en) |
| DE (2) | DE3828662A1 (en) |
| RU (1) | RU1807938C (en) |
| ZA (1) | ZA896036B (en) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3915984C1 (en) * | 1989-05-17 | 1990-09-06 | Wolfgang 6601 Kleinblittersdorf De Decker | |
| DE4021922C2 (en) * | 1990-07-09 | 1993-12-09 | Intrafico | Process for compounding and recycling plastics |
| EP0635345B1 (en) * | 1993-07-19 | 1999-04-14 | COMAV S.r.l. | System for compacting expanded polystyrene |
| AT405920B (en) * | 1997-02-03 | 1999-12-27 | Keplinger Johann | Apparatus for producing marking posts from plastic |
| CN101579914A (en) * | 2008-05-13 | 2009-11-18 | 东莞市燿安塑胶机器有限公司 | Plastic extruder |
| CN102294767B (en) * | 2011-08-11 | 2014-10-29 | 南昌大学 | Method for recovering and granulating waste plastic |
| CN102441952A (en) * | 2011-08-26 | 2012-05-09 | 安徽中鼎橡塑制品有限公司 | Plastic oil-can recycling machine |
| CN102350749A (en) * | 2011-08-31 | 2012-02-15 | 广州讯展环保科技有限公司 | Plastic melting equipment |
| CN102744803A (en) * | 2012-07-20 | 2012-10-24 | 太仓东能环保设备有限公司 | Plastic recycling processing device |
| CN104275754A (en) * | 2013-07-12 | 2015-01-14 | 窦洪波 | Continuous melting and extruding machine for waste organics |
| CN104055204A (en) * | 2014-06-10 | 2014-09-24 | 南通中意达自动化设备科技有限公司 | Efficient granulated feed processing equipment |
| CN104055206B (en) * | 2014-06-10 | 2017-01-11 | 机械科学研究总院青岛分院 | Pneumatic pellet feed machine |
| CN104149379B (en) * | 2014-06-10 | 2017-01-04 | 舒兰市聚烽生物再生能源有限公司 | A kind of biomass solid shaping machine |
| CN104705771A (en) * | 2015-03-17 | 2015-06-17 | 东至县香泉特色养殖有限公司 | Soft-shelled turtle foodstuff production device |
| CN104802436B (en) * | 2015-04-01 | 2016-04-13 | 中国恩菲工程技术有限公司 | Vertical material extrusion dehydration becomes cake equipment |
| CN104802437B (en) * | 2015-04-01 | 2017-03-01 | 中国恩菲工程技术有限公司 | Horizontal material extrusion dehydration becomes cake equipment |
| CN104802334A (en) * | 2015-05-13 | 2015-07-29 | 江苏亚星波纹管有限公司 | Equipment for regenerating plastic by melting waste plastic |
| CN107351277A (en) * | 2017-06-30 | 2017-11-17 | 徐州腾飞工程塑料有限公司 | A kind of small plastic particle process units |
| CN109263007A (en) * | 2018-08-04 | 2019-01-25 | 全椒祥瑞塑胶有限公司 | A kind of efficient automotive upholstery extrusion equipment |
| CN108995082B (en) * | 2018-09-26 | 2020-11-13 | 徐州大塑人机械有限公司 | Efficient granulator for recycling polyvinyl chloride resin |
| CN110328773A (en) * | 2019-05-31 | 2019-10-15 | 长兴悦成塑料制品有限公司 | A kind of plastic pellet production and processing integrated equipment |
| CN110900872A (en) * | 2019-11-07 | 2020-03-24 | 湖南工业大学 | High-filling wood-plastic composite material granulating machine head |
| CN111070466B (en) * | 2020-01-03 | 2020-10-27 | 温州转宇纺织有限公司 | Waste plastic granulation reprocessing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3004294A (en) * | 1958-03-12 | 1961-10-17 | Hoechst Ag | Process for the manufacture of granular products |
| FR2011458A1 (en) * | 1968-06-22 | 1970-02-27 | Albert Ag Chem Werke | |
| DE2261678A1 (en) * | 1971-12-27 | 1973-07-19 | Flums Ag Maschf | COMPRESSION SYSTEM |
| DE2614730C2 (en) * | 1976-04-06 | 1985-04-04 | Pallmann KG Maschinenfabrik, 6660 Zweibrücken | Device for the continuous agglomeration of thermoplastic plastic waste, in particular plastic films |
| DE2647944C2 (en) * | 1976-10-22 | 1979-04-12 | Rolf 8502 Zirndorf Schnause | Method and device for the production of moldings from thermoplastics and a sheet-shaped, chipped, fibrous, non-thermoplastic material |
| DE2703461C2 (en) * | 1977-01-28 | 1985-01-10 | Davy McKee AG, 6000 Frankfurt | Stop unit for the pre-compression of shredded, voluminous polymer waste |
| DE2829232C2 (en) * | 1978-07-03 | 1983-10-20 | Ruhrchemie Ag, 4200 Oberhausen | Process for the production of moldings from high molecular weight low-pressure polyethylene |
| DE3485203D1 (en) * | 1983-07-22 | 1991-11-28 | Mapro Inc | METHOD AND DEVICE FOR REMOVING HUMIDITY AND VOLATILE COMPONENTS FROM PARTICULATE MOLDING MATERIAL. |
| HU197249B (en) * | 1986-07-02 | 1989-03-28 | Taurus Gumiipari Vallalat | Device for reducing organic materials |
| IT1201132B (en) * | 1987-01-13 | 1989-01-27 | Tenchini Snc Flli | CONTINUOUS COMPACTING AND SINTERING MACHINE OF THERMOPLASTIC MATERIALS |
-
1988
- 1988-08-24 DE DE19883828662 patent/DE3828662A1/en active Granted
-
1989
- 1989-05-27 DE DE58908172T patent/DE58908172D1/en not_active Expired - Fee Related
- 1989-05-27 EP EP19890109584 patent/EP0357880B1/en not_active Expired - Lifetime
- 1989-05-27 AT AT89109584T patent/ATE109714T1/en not_active IP Right Cessation
- 1989-06-15 DD DD89329640A patent/DD283968A5/en not_active IP Right Cessation
- 1989-06-22 RU SU894614393A patent/RU1807938C/en active
- 1989-07-24 CN CN89104741A patent/CN1030696C/en not_active Expired - Fee Related
- 1989-07-26 CA CA 606653 patent/CA1335033C/en not_active Expired - Fee Related
- 1989-08-08 ZA ZA896036A patent/ZA896036B/en unknown
- 1989-08-17 JP JP21078289A patent/JPH066291B2/en not_active Expired - Lifetime
- 1989-08-24 BR BR8904251A patent/BR8904251A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DD283968A5 (en) | 1990-10-31 |
| CN1030696C (en) | 1996-01-17 |
| ATE109714T1 (en) | 1994-08-15 |
| JPH02175108A (en) | 1990-07-06 |
| EP0357880B1 (en) | 1994-08-10 |
| EP0357880A2 (en) | 1990-03-14 |
| ZA896036B (en) | 1990-05-30 |
| CN1040540A (en) | 1990-03-21 |
| DE3828662C2 (en) | 1993-02-25 |
| BR8904251A (en) | 1991-02-13 |
| JPH066291B2 (en) | 1994-01-26 |
| RU1807938C (en) | 1993-04-07 |
| DE58908172D1 (en) | 1994-09-15 |
| DE3828662A1 (en) | 1990-03-08 |
| EP0357880A3 (en) | 1990-05-30 |
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| Date | Code | Title | Description |
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| MKLA | Lapsed |