GB2443428A - Machine comprising a rotary screw conveyor for drying washed plastic - Google Patents

Machine comprising a rotary screw conveyor for drying washed plastic Download PDF

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Publication number
GB2443428A
GB2443428A GB0621841A GB0621841A GB2443428A GB 2443428 A GB2443428 A GB 2443428A GB 0621841 A GB0621841 A GB 0621841A GB 0621841 A GB0621841 A GB 0621841A GB 2443428 A GB2443428 A GB 2443428A
Authority
GB
United Kingdom
Prior art keywords
cylinder
machine
shield
input
screw bar
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.)
Withdrawn
Application number
GB0621841A
Other versions
GB0621841D0 (en
Inventor
Mu-Tsang Yang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FU CHIN YANG
Original Assignee
FU CHIN YANG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by FU CHIN YANG filed Critical FU CHIN YANG
Priority to GB0621841A priority Critical patent/GB2443428A/en
Publication of GB0621841D0 publication Critical patent/GB0621841D0/en
Publication of GB2443428A publication Critical patent/GB2443428A/en
Withdrawn legal-status Critical Current

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
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/121—Screw constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/122—Means preventing the material from turning with the screw or returning towards the feed hopper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/127—Feed means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/14—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with only one screw or worm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/16—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with two or more screws or worms
    • B30B9/163—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with two or more screws or worms working in different chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/26—Permeable casings or strainers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
    • F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/14—Drying solid materials or objects by processes not involving the application of heat by applying pressure, e.g. wringing; by brushing; by wiping

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

A machine 10 for drying washed plastic comprises a cylinder 20 having a plurality of bores (21, fig.4) located on a bottom of the cylinder, a screw bar (30, fig.8) received in the cylinder, and a driving device 40 provided on an end of the cylinder to rotate the screw bar. The cylinder has an output at an end opposite to the driving device and an input adjacent to the driving device. Preferably, the cylinder has a plurality of bores located around its circumference. The cylinder may have a plurality of internal axial guiding slots (22, fig.6). Preferably, an input device 50 is connected to the input of the cylinder, where the input device includes an input container 51 connected to the input of the cylinder and an input screw bar 52 rotated by a motor 53. A heater 70 may be provided on the cylinder, adjacent to the output, to enhance the drying process. A shield 80 covering the cylinder, with a pipe (81, fig.2) located at the bottom of the shield, may also be provided. Preferably, a blower (90, fig.2) is connected to the shield to provide an air flow, or a hot air flow, into the shield. An exhauster (95, fig.2) may be connected to the shield to exhaust air from the shield; the pressure in the shield may be lower than the pressure in the cylinder. A cutting device 60 may be provided adjacent to the output of the cylinder. Preferably, the cutting device comprises an output die head (61, fig.3) fixed to the screw bar for rotating along with the screw bar and having a plurality of spiral guiding slots (611, fig.9) on an exterior side, a cutter (62, fig.3) pivoted on the output die head, a motor 63, and a belt assembly 64 connecting the motor and the cutter.

Description

WASHED PLASTIC DRYING MACHINE
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a device for treatment of recyclable plastic, and more particularly to a machine for drying the washed plastic, like plastic film or bag.
2. Description of the Related Art
A conventional process for treating the recyclable plastic, like plastic film or bag, includes crushing, washing, drying and pelletizing by a pelletizer. In the drying procedure, it needs a dryer to remove water and sends the crushed plastic to a blower, which provides hot air flow. After that, the crushed plastic is collected in a container.
The plastic film or bag always bond together after the washing procedure, so that they are hard to be dried totally in the following drying procedure. In addition, the blower usually is huge and makes big noise that is bad for the work place and increases the cost.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a machine for drying washed plastic, which is smaller in size, makes less noise and keeps a high performance of drying.
According to the objective of the present invention, a machine for drying washed plastic includes a cylinder having a plurality of bores on a bottom thereof, a screw bar received in the cylinder, and a driving device provided on an end of the cylinder to drive the screw bar for rotation. The cylinder has an output at an end opposite to the driving device and an input adjacent to the driving device.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. I is a top view of a preferred embodiment of the present invention; FIG 2 is a front view of the preferred embodiment of the present invention; FIG 3 is a sectional view of the cylinder of FIG 1; FIG 4 is a sectional view of the cylinder of FIG. 2; FIG 5 is a sectional view of the C-section of the cylinder of FIG 4; FIG 6 is a sectional view along the 6-6 line of FIG 5; FIG 7 is a sectional view along the 7-7 line of FIG 5; FIG 8 is an enlarged view of the screw bar of FIG. 4; FIG 9 is an enlarged view of the die head of FIG 4; FIG 10 is a left view of FIG 9; and FIG II is a sectional view along the 11-11 line of FIG 9.
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIGS. 1 to 3, a machine 10 for drying washed plastic includes: A cylinder 20 is a horizontal elongated barrel with bores 21 on a bottom thereof for drainage. In the present embodiment, the cylinder 20 has four sections, including A section, B section, C section and D section, except for the D section, the rest of which has some of the bores 21. As shown in FIG 5, the cylinder 20 has a plurality of guiding slots 22 on an interior side thereof and along an axial direction. As shown in FIG 3, the right side of the cylinder A has an input 23 and the left side thereof has an output 24.
A screw bar 30, as shown in FIG 8, is received in the cylinder 20 having an input section 31, a compression section 32, a decompression section 33 and a output section 34 in the A to D sections respectively. The input section 31 has a greater pitch to draw more plastic in. The compression section 32 has a smaller pitch to compress the plastic for quick water removal. The pitch of the decompression section 33 is a little greater than that of the compression section 32 to decompress the plastic that may vapor the residual water. En the output section 34, the pitch thereof is narrow again to powerful compress the plastic for the third time of water removal.
A driving device 40 includes a motor 41, a belt assembly 43 and a deceleration gearbox 43 to drive the screw bar 30.
An input device 50 includes an input container 51, an input screw bar 52 and a motor 53. The motor 53 drives the input screw bar 52 for rotation, and the input container 51 is in connection with the input 23 of the cylinder 23.
A cutting device 60, which is provided at the output 24 of the cylinder 20, includes an output die head 61 received in the output 24 of the cylinder 20, a cutter 62 and a motor 63 and a belt assembly 64, as shown in FIGS. 9 to 11. The output die head 61 is fixed to the screw bar 30 and rotates along with the screw bar 30. The output die head 61 has spiral guiding slots 611 on an exterior side. The cutter 62 is pivoted on the exterior side of the output die head 61. The motor 63 drives the cutter 62 for rotation via the belt assembly 64 to cut the plastic from the guiding slots 611 of the output die head 61 into pellets.
In operation of the machine 10 of the present invention, the recyclable plastic, like plastic film or bag, is sent to the input container 51 after the crushing and washing procedures. The input screw bar 52 sends the plastic in the input container 51 to the input 23 of the cylinder 20. The screw bar 33 will serve the drying function, including compressing in the compression section 32 for removal of most water, decompressing in the decompression Section 33 for natural evaporation of water and powerful compressing again in the output section 34 to heat the plastic for evaporation of the residual water. At least, the dried plastic is outputted through the output die head 61 and cut by the cutter 62 into fine pellets.
The guiding slots 22 on the interior side of the cylinder 20 may prevent the plastic only rotation but moving when the screw bar 30 rotates to transport the plastic.
The plastic will rub against the interior side of the cylinder 20 when the screw bar 30 rotates that may heat the plastic to help evaporation of water.
For enhancement of drying, it may provide a heater on the cylinder 20. In the embodiment, an electrical heater 70 is provided on the D section of the cylinder 20 to heat the plastic over 100 C.
In the embodiment, the temperature of the plastic when it passes the D section of the cylinder 20 is closed to the melting temperature of plastic, so that the cylinder 20 has no bore in the D section to prevent the molten plastic flows out of the cylinder 20 other than the output 24. The heat of the electrical heater 70 may transmit to the C section that helps the evaporation of water in it also.
As shown in FIG 1 and FIG 2, a shield 80 covers the cylinder 20 to collect water out of the cylinder 20 via the bores 21. The shield 80 has two pipes 81 on a bottom thereof to drain the water out.
The pipes 81 of the shield 80 may be connected to a blower 90 and an exhauster 95 (shown as the dot line in FIG 2). The blower 90 sends hot air flow in and the exhauster 95 exhausts it out to enhance the capacity of water removal. It may provide the blower 90 only, the blower 90 may provide hot air flow into the shield 80 to help evaporation of water. It also may provide the exhauster 95 only, and the exhauster 95 exhausts the shield 80 of air that makes an approximate vacuum condition in the shield 80(0 help evaporation of water.
The description above is a few preferred embodiments of the present invention and the equivalence of the present invention is still in the scope of the claim of the present invention.

Claims (14)

  1. WHAT IS CLAIMED IS: 1. A machine for drying washed plastic, comprising:
    a cylinder having a plurality of bores on a bottom thereof; a screw bar received in the cylinder; a driving device provided on an end of the cylinder to drive the screw bar for rotation; wherein the cylinder has an output at an end opposite to the driving device and an input adjacent to the driving device.
  2. 2. The machine as defined in claim 1, wherein the cylinder has a plurality of bores on a circumference thereof.
  3. 3. The machine as defined in claim 2, wherein the cylinder has a guiding slot on an interior side thereof along an axial direction.
  4. 4. The machine as defined in claim 1, further comprising an input device connected to the input of the cylinder.
  5. 5. The machine as defined in claim 4, wherein the input device includes an input container connected to the input of the cylinder, an input screw bar and a motor driving the screw bar for rotation.
  6. 6. The machine as defined in claim 1, further comprising a heater provided on the cylinder adjacent to the output.
  7. 7. The machine as defined in claim 1, further comprising a shield covering the cylinder, wherein the shield includes a pipe at a bottom thereof.
  8. 8. The machine as defined in claim 7, further comprising a blower connected to the shield for providing air flow into the shield.
  9. 9. The machine as defined in claim 7, further comprising an exhauster connected to the shield for exhausting the shield of air.
  10. 10. The machine as defined in claim 8, wherein the blower provides hot air flow.
  11. 11. The machine as defined in claim 9, wherein a pressure in the shield is lower than that in the cylinder.
  12. 12. The machine as defined in claim 1, further comprising a cutting device adjacent to the output of the cylinder.
  13. 13. The machine as defined in claim 12, wherein the cutting device includes an output die head fixed to the screw bar to be rotated along with the screw bar and having a plurality of spiral guiding slot on an exterior side, a cutter pivoted on the output die head, a motor and a belt assemble connecting the motor and the cutter.
  14. 14. A machine for drying washed plastic, substantially as hereinbefore described with reference to the accompanying drawings.
GB0621841A 2006-11-02 2006-11-02 Machine comprising a rotary screw conveyor for drying washed plastic Withdrawn GB2443428A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0621841A GB2443428A (en) 2006-11-02 2006-11-02 Machine comprising a rotary screw conveyor for drying washed plastic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0621841A GB2443428A (en) 2006-11-02 2006-11-02 Machine comprising a rotary screw conveyor for drying washed plastic

Publications (2)

Publication Number Publication Date
GB0621841D0 GB0621841D0 (en) 2006-12-13
GB2443428A true GB2443428A (en) 2008-05-07

Family

ID=37547207

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0621841A Withdrawn GB2443428A (en) 2006-11-02 2006-11-02 Machine comprising a rotary screw conveyor for drying washed plastic

Country Status (1)

Country Link
GB (1) GB2443428A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103234329A (en) * 2013-05-14 2013-08-07 张家港海滨机械有限公司 Double helical squeezing machine
CN103350517A (en) * 2013-06-21 2013-10-16 侯文明 Oil press provided with improved control circuit
EP2937209A1 (en) * 2014-04-22 2015-10-28 Rio Tinto Alcan International Limited Modular screw press

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1163913A (en) * 1965-10-08 1969-09-10 French Oil Mill Machinery Improvements in or relating to Apparatus for Drying Elastomeric Materials
US3578740A (en) * 1968-10-08 1971-05-18 Goodrich Gulf Chemical Inc Dewatering pelletizer apparatus
EP0090373A2 (en) * 1982-03-25 1983-10-05 AluPlast GmbH Drying wastes of plastic webs
US4520724A (en) * 1982-08-18 1985-06-04 Edoardo Costarelli Screw drier particularly for plastic materials
US5337658A (en) * 1984-04-19 1994-08-16 Spirac Engineering Ab Conveying and compacting apparatus having a shaftless spiral in a casing with drainage openings
DE19706374A1 (en) * 1997-02-19 1998-08-20 Pallmann Kg Maschf Agglomeration of scrap plastics, especially wet film off cuts
NL1009664C2 (en) * 1998-07-15 2000-01-18 Rollepaal B V Maschf De Pyrolysis of plastic or glass material, comprising an extrusion process where the material is passed through thermally distinct zones with different temperatures
US20030007709A1 (en) * 2001-07-05 2003-01-09 Norbert Schweigler Internal bearing for screw machines
US20040238436A1 (en) * 2001-09-03 2004-12-02 Christian Widmer Press for dewatering a humid substance, in particular residual refuse
JP2005000961A (en) * 2003-06-12 2005-01-06 Kawasaki Heavy Ind Ltd Dehydration apparatus

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1163913A (en) * 1965-10-08 1969-09-10 French Oil Mill Machinery Improvements in or relating to Apparatus for Drying Elastomeric Materials
US3578740A (en) * 1968-10-08 1971-05-18 Goodrich Gulf Chemical Inc Dewatering pelletizer apparatus
EP0090373A2 (en) * 1982-03-25 1983-10-05 AluPlast GmbH Drying wastes of plastic webs
US4520724A (en) * 1982-08-18 1985-06-04 Edoardo Costarelli Screw drier particularly for plastic materials
US5337658A (en) * 1984-04-19 1994-08-16 Spirac Engineering Ab Conveying and compacting apparatus having a shaftless spiral in a casing with drainage openings
DE19706374A1 (en) * 1997-02-19 1998-08-20 Pallmann Kg Maschf Agglomeration of scrap plastics, especially wet film off cuts
NL1009664C2 (en) * 1998-07-15 2000-01-18 Rollepaal B V Maschf De Pyrolysis of plastic or glass material, comprising an extrusion process where the material is passed through thermally distinct zones with different temperatures
US20030007709A1 (en) * 2001-07-05 2003-01-09 Norbert Schweigler Internal bearing for screw machines
US20040238436A1 (en) * 2001-09-03 2004-12-02 Christian Widmer Press for dewatering a humid substance, in particular residual refuse
JP2005000961A (en) * 2003-06-12 2005-01-06 Kawasaki Heavy Ind Ltd Dehydration apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103234329A (en) * 2013-05-14 2013-08-07 张家港海滨机械有限公司 Double helical squeezing machine
CN103350517A (en) * 2013-06-21 2013-10-16 侯文明 Oil press provided with improved control circuit
CN103350517B (en) * 2013-06-21 2016-08-10 侯文明 A kind of oil press improving control circuit
EP2937209A1 (en) * 2014-04-22 2015-10-28 Rio Tinto Alcan International Limited Modular screw press
EP3134194A4 (en) * 2014-04-22 2018-01-24 Rio Tinto Alcan International Limited Modular screw press

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Publication number Publication date
GB0621841D0 (en) 2006-12-13

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