CA1120225A - Transport system for hot melt - Google Patents
Transport system for hot meltInfo
- Publication number
- CA1120225A CA1120225A CA000341467A CA341467A CA1120225A CA 1120225 A CA1120225 A CA 1120225A CA 000341467 A CA000341467 A CA 000341467A CA 341467 A CA341467 A CA 341467A CA 1120225 A CA1120225 A CA 1120225A
- Authority
- CA
- Canada
- Prior art keywords
- belt
- spew
- granules
- conveyor
- granulator
- 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
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
- B29B17/0005—Direct recuperation and re-use of scrap material during moulding operation, i.e. feed-back of used material
-
- 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
- B29C48/04—Particle-shaped
-
- 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
-
- 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)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
TRANSPORT SYSTEM FOR HOT MELT A method and apparatus for reclaiming a spew of hot melt thermoplastic material from an extruder head, in which granules of the termoplastic material are spread onto an endless conveyor belt to form a layer on the belt, the spew is fed from the extruder head onto the layer of granules, and both the spew and the granules are fed into a granulator.
Description
- ~ \
;225 FTF~ OF THE INVENTION
This invention relates to the operat:Lon of an extruder of thermoplastic material such as polyethylene or polyvinylchloride.
BACKGROUND OF THE INVENTION
To start up an extruder it is necessary first to run it in a warm-up. Because the plastic material is relatively expensive it is customary to granulate the spew as it emerges from the extruder head during the warm-up and recycle it into the extruder. In order to allow the spew to cool and solidify before it reaches the granu-lator it is fed onto a conveyor belt frcm the extruder head and travels along the conveyor belt which deposits it into the granulator where it is chopped up for re-use. ¦
Recycled plastic material must be free of impurities 1 and this is difficult to achieve with spew beca~se the molten plastic tends to adhere to the conveyor belt and pick up foreign material of the belt as well as damaging it. Various materials have been used to coat the conveyor belt but with limited success and/or uneconomical cost.
It is an object of the present in~ention to provide an improved method and apparatus for conveying hot melt plastic material from an extruder to a granulator. ~
"' ' '' SUMMARY OF THE INV~rION
Essentially the invention consists of a methocl of reclaiming hot melt thermoplastic material from an extruder head -- 1 -- .
~ `'~.
.2~5 comprising the s-teps of: spreading granules of the plastic material onto the endless belt of a conveyor to form a layer on the bel-t, the temperature of the granules being sufficiently lower than the temperatu:re of the spew to avoid adherence of the granules to the hel-t; feeding the spew of -the thermoplastic material from the extruder head onto the layer of granules; feeding the spew and the granules from the conveyor belt into a granulator.
In another aspect the invent:ion consists of apparatus for reclaiming a spew of hot melt thermoplastic material from an extruder head, comprising: an extruder ~
head; a granulator;a conveyor having an end:Less belt: with .
an upstream end and a downstream end, -the granulator be-ing located at the downstream end of the be].-t and the extruder head being located upstream therefrom; and means to feed granules of said thermoplastic ma-terial onto the belt of the conveyor upstream of the extruder head -to form a layer thereon whereby the spew deposited on the belt will be concucted to the granulator out of con-tact with the belt.
DESCRIPTION OF THE DRAWINGS
An example embodiment of the invention is shown in the accompanying drawing in which:
Figure 1 shows a perspective view of a spew reclaiming apparatus. ~'~
,~ ;; ';
DESCRIPTION OF PREFERRED EMBODIMENT : ::
,:
In the example embodiment a conveyer :10 ~2~;
-is interposed between ex-truder 12 an a granulator 14.
Extruder 12 is fed by a hopper 14 and has a head 16 which may be aligned with a trough 18 for use in jacke-t-ing a cable. Granulator 14, driven by a motor 20, is connected by a blower 22 through a duct 24 to a cyclone separator 26 feeding into a collector 28.
,r ~
'' '',' '' '~
''` ;',~`'i~ : ', ~. '. ', . . ~
.~ .
- 2a - ~ :
Z~2~i Conveyor 10 comprises a frame 30 on which an endless conveyor belt 32 is driven on journalled rollers 34 by suitable drive means 36. Conveyor belt 32 is positioned to have head 16 of extruder 12 located adjacent one end 38 of the belt and to have granulator 14 located beneath the other end 40 of the belt.
At end 38 of belt 32 a spreader 42 is located above the belt. Frame 10 is supported on castored legs 44.
In operation extruder 10 is started ~Ip and at the same time the operations of conveyor 10, granulator 14 and cyclone separator 26 are initiated. Granulated plastic of the same type as that issuing from the extruder is fed through spreacler 42 onto belt 32 in sufficient quantity to form a layer of granules 46 on the belt.
Spew 48 is then extruded from head 16 onto belt 32 as seen in the drawing, the spew lying on granules 46 and out of contact with the belt itself. Belt 32 carries spew 48 along conveyor 10 until it drops off end 40 of the belt into granulator 14 along with granules 46. Granulator 14 chops up spew 48 and passes the particles, together 1 with granules 46 dropping into the granulator from t;he end of the conveyor, by blower 22 to cyclone separator 26 which cools the granules 20 and passes them to collector 28. From collector 28 the granules are recycled into hopper 14 of extruder 12 and hopper 42 of conveyor 10. ~ ~
For proper operation the speed of conveyor belt 32 should be about ~ ;
the same as the speed of extrusion of spew 48 from head 16, and both speeds should be adjusted to the receiving capacity of granulator 24. `
When extruder 12 has been heated to c,perating temperature conveyor 10, including spreader 42, is preferably moved away ~rom the area of the extr~der to provide additional opera~ing room. -~
It will be appreciated that the provision of granules 46, forming a layer on conveyor belt 32, keeps hot spew 48 out of 3Q contact with the belt and prevents the spew from da~Eging the belt ~ , :, : ., - . . . ..
)Z2S
surface by adherence wlth resulting contamination of the spew itself.
Granules 46, being at ambient temperature, do not adhere to belt 32.
;225 FTF~ OF THE INVENTION
This invention relates to the operat:Lon of an extruder of thermoplastic material such as polyethylene or polyvinylchloride.
BACKGROUND OF THE INVENTION
To start up an extruder it is necessary first to run it in a warm-up. Because the plastic material is relatively expensive it is customary to granulate the spew as it emerges from the extruder head during the warm-up and recycle it into the extruder. In order to allow the spew to cool and solidify before it reaches the granu-lator it is fed onto a conveyor belt frcm the extruder head and travels along the conveyor belt which deposits it into the granulator where it is chopped up for re-use. ¦
Recycled plastic material must be free of impurities 1 and this is difficult to achieve with spew beca~se the molten plastic tends to adhere to the conveyor belt and pick up foreign material of the belt as well as damaging it. Various materials have been used to coat the conveyor belt but with limited success and/or uneconomical cost.
It is an object of the present in~ention to provide an improved method and apparatus for conveying hot melt plastic material from an extruder to a granulator. ~
"' ' '' SUMMARY OF THE INV~rION
Essentially the invention consists of a methocl of reclaiming hot melt thermoplastic material from an extruder head -- 1 -- .
~ `'~.
.2~5 comprising the s-teps of: spreading granules of the plastic material onto the endless belt of a conveyor to form a layer on the bel-t, the temperature of the granules being sufficiently lower than the temperatu:re of the spew to avoid adherence of the granules to the hel-t; feeding the spew of -the thermoplastic material from the extruder head onto the layer of granules; feeding the spew and the granules from the conveyor belt into a granulator.
In another aspect the invent:ion consists of apparatus for reclaiming a spew of hot melt thermoplastic material from an extruder head, comprising: an extruder ~
head; a granulator;a conveyor having an end:Less belt: with .
an upstream end and a downstream end, -the granulator be-ing located at the downstream end of the be].-t and the extruder head being located upstream therefrom; and means to feed granules of said thermoplastic ma-terial onto the belt of the conveyor upstream of the extruder head -to form a layer thereon whereby the spew deposited on the belt will be concucted to the granulator out of con-tact with the belt.
DESCRIPTION OF THE DRAWINGS
An example embodiment of the invention is shown in the accompanying drawing in which:
Figure 1 shows a perspective view of a spew reclaiming apparatus. ~'~
,~ ;; ';
DESCRIPTION OF PREFERRED EMBODIMENT : ::
,:
In the example embodiment a conveyer :10 ~2~;
-is interposed between ex-truder 12 an a granulator 14.
Extruder 12 is fed by a hopper 14 and has a head 16 which may be aligned with a trough 18 for use in jacke-t-ing a cable. Granulator 14, driven by a motor 20, is connected by a blower 22 through a duct 24 to a cyclone separator 26 feeding into a collector 28.
,r ~
'' '',' '' '~
''` ;',~`'i~ : ', ~. '. ', . . ~
.~ .
- 2a - ~ :
Z~2~i Conveyor 10 comprises a frame 30 on which an endless conveyor belt 32 is driven on journalled rollers 34 by suitable drive means 36. Conveyor belt 32 is positioned to have head 16 of extruder 12 located adjacent one end 38 of the belt and to have granulator 14 located beneath the other end 40 of the belt.
At end 38 of belt 32 a spreader 42 is located above the belt. Frame 10 is supported on castored legs 44.
In operation extruder 10 is started ~Ip and at the same time the operations of conveyor 10, granulator 14 and cyclone separator 26 are initiated. Granulated plastic of the same type as that issuing from the extruder is fed through spreacler 42 onto belt 32 in sufficient quantity to form a layer of granules 46 on the belt.
Spew 48 is then extruded from head 16 onto belt 32 as seen in the drawing, the spew lying on granules 46 and out of contact with the belt itself. Belt 32 carries spew 48 along conveyor 10 until it drops off end 40 of the belt into granulator 14 along with granules 46. Granulator 14 chops up spew 48 and passes the particles, together 1 with granules 46 dropping into the granulator from t;he end of the conveyor, by blower 22 to cyclone separator 26 which cools the granules 20 and passes them to collector 28. From collector 28 the granules are recycled into hopper 14 of extruder 12 and hopper 42 of conveyor 10. ~ ~
For proper operation the speed of conveyor belt 32 should be about ~ ;
the same as the speed of extrusion of spew 48 from head 16, and both speeds should be adjusted to the receiving capacity of granulator 24. `
When extruder 12 has been heated to c,perating temperature conveyor 10, including spreader 42, is preferably moved away ~rom the area of the extr~der to provide additional opera~ing room. -~
It will be appreciated that the provision of granules 46, forming a layer on conveyor belt 32, keeps hot spew 48 out of 3Q contact with the belt and prevents the spew from da~Eging the belt ~ , :, : ., - . . . ..
)Z2S
surface by adherence wlth resulting contamination of the spew itself.
Granules 46, being at ambient temperature, do not adhere to belt 32.
Claims (3)
1. A method of reclaiming a spew of hot melt thermoplastic material from an extruder head comprising the steps of:
spreading granules of the plastic material onto the endless belt of a conveyor to form a layer on -the belt, the temperature of the granules being sufficiently lower than the temperature of the spew to avoid adherence of the granules to the belt;
feeding the spew of the thermoplastic material from the extruder head onto the layer of granules;
feeding the spew and the granules from the conveyor belt into a granulator.
spreading granules of the plastic material onto the endless belt of a conveyor to form a layer on -the belt, the temperature of the granules being sufficiently lower than the temperature of the spew to avoid adherence of the granules to the belt;
feeding the spew of the thermoplastic material from the extruder head onto the layer of granules;
feeding the spew and the granules from the conveyor belt into a granulator.
2. Apparatus for reclaiming a spew of hot melt thermoplastic material from an extruder head, comprising:
an extruder head;
a granulator;
a conveyor having an endless belt with an upstream end and a downstream end, the granulator being located at the downstream end of the belt and the extru-der head being located upstream therefrom; and means to feed granules of said thermoplastic material onto the belt of the conveyor upstream of the ext-ruder head to form a layer thereon whereby the spew dep-osited on the belt will be conducted to the granulator out of contact with the belt.
an extruder head;
a granulator;
a conveyor having an endless belt with an upstream end and a downstream end, the granulator being located at the downstream end of the belt and the extru-der head being located upstream therefrom; and means to feed granules of said thermoplastic material onto the belt of the conveyor upstream of the ext-ruder head to form a layer thereon whereby the spew dep-osited on the belt will be conducted to the granulator out of contact with the belt.
3. Apparatus as claimed in claim. 2 in which the granule feeding means comprises a spreader positioned above the belt of the conveyor and adjacent that end of the conveyor remote from the granulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000341467A CA1120225A (en) | 1979-12-07 | 1979-12-07 | Transport system for hot melt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000341467A CA1120225A (en) | 1979-12-07 | 1979-12-07 | Transport system for hot melt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1120225A true CA1120225A (en) | 1982-03-23 |
Family
ID=4115780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000341467A Expired CA1120225A (en) | 1979-12-07 | 1979-12-07 | Transport system for hot melt |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1120225A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107263761A (en) * | 2017-07-28 | 2017-10-20 | 晋江市陆钢塑料机械有限公司 | Radial self-adjusting grain cutting cutter head |
-
1979
- 1979-12-07 CA CA000341467A patent/CA1120225A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107263761A (en) * | 2017-07-28 | 2017-10-20 | 晋江市陆钢塑料机械有限公司 | Radial self-adjusting grain cutting cutter head |
| CN107263761B (en) * | 2017-07-28 | 2023-04-28 | 晋江市陆钢塑料机械有限公司 | Radial self-adjusting grain cutter head |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3883624A (en) | Recovery and utilization of scrap in production of foamed thermoplastic polymeric products | |
| US5518188A (en) | Method of recycling carpet forming components from waste carpet | |
| CA2079070C (en) | Process and device to cool and pelletize molten strands issuing from nozzles | |
| US8110131B1 (en) | Carpet reclamation system | |
| US8337189B2 (en) | Continuous casting device for producing pellets from plastic material and method for operating the same | |
| US4349325A (en) | Apparatus for manufacturing plastic products | |
| MX9704077A (en) | Method and apparatus of recycling previously used agricultural plastic film mulch. | |
| US4459254A (en) | Transport system for hot melt | |
| CA1120225A (en) | Transport system for hot melt | |
| US6039905A (en) | Apparatus and method for granulating plastic strands | |
| US20200307060A1 (en) | Apparatus for recycling waste automobile floor mat | |
| EP0086687B1 (en) | Process and device for the continuous production of glass fibre or strand-reinforced sheets of thermoplastic polymers | |
| EP0831986B1 (en) | Feed device and method for extruders | |
| US20140186477A1 (en) | Carpet Reclamation System | |
| CA1105221A (en) | On-line reclaim system | |
| CN209851363U (en) | Plasticator and have phenolic resin plasticator system of this plasticator | |
| US3646187A (en) | Polymer processing | |
| DE4420211C1 (en) | Preparation of granules from contaminated mixed polymer waste | |
| EP0657572A1 (en) | Method for producing a woven/non-woven thermoadhesive product particularly for interfacings comprising dots melting at differential temperature, and a plant for implementing the method | |
| KR101938594B1 (en) | Extruder | |
| JP3258418B2 (en) | Molding method for resin molded products | |
| JP4650963B2 (en) | Electric wire coating material recycling method and recycling apparatus | |
| WO1996024477A1 (en) | An extrusion and forming method for scrap plastics materials | |
| JP3182074B2 (en) | Safety device for coating film peeling device | |
| ATE375240T1 (en) | METHOD AND DEVICE FOR PRODUCING MOLDED PLASTIC PARTS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |