CN110887369A - Wood powder continuous extrusion drying device and process thereof - Google Patents
Wood powder continuous extrusion drying device and process thereof Download PDFInfo
- Publication number
- CN110887369A CN110887369A CN201911079953.0A CN201911079953A CN110887369A CN 110887369 A CN110887369 A CN 110887369A CN 201911079953 A CN201911079953 A CN 201911079953A CN 110887369 A CN110887369 A CN 110887369A
- Authority
- CN
- China
- Prior art keywords
- screw
- wood flour
- drying device
- continuous extrusion
- wood powder
- 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.)
- Pending
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Classifications
-
- 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
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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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
-
- 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
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/59—Screws characterised by details of the thread, i.e. the shape of a single thread of the material-feeding screw
-
- 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
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/59—Screws characterised by details of the thread, i.e. the shape of a single thread of the material-feeding screw
- B29C48/61—Threads having wavy profiles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/04—Heating arrangements using electric heating
- F26B23/06—Heating arrangements using electric heating resistance heating
Abstract
The device comprises a charging barrel, a screw rod is arranged in the charging barrel, the screw rod is divided into a screw ridge and an annular stretching ridge, the screw rod is driven by a motor to rotate, the front end of the charging barrel is provided with a hopper for feeding, the tail end of the charging barrel is connected with a material collecting bin, the material collecting bin is communicated to a storage bin through a feeding pipe, and the lower part of the storage bin is connected with a discharge hole. According to the invention, the wood powder is dried by introducing the heated screw and the heated charging barrel, and particularly, the annular stretching edge is added on the screw structure, so that the wood powder layer can be continuously thinned in the screw, the contact between the screw and the charging barrel is increased, and the drying efficiency is improved. The minimum moisture content of the wood powder dried by the process can reach 0.2%, and the drying efficiency can reach 25 kg/h.
Description
Technical Field
The invention relates to the technical field of drying of wood-plastic composite materials, in particular to a wood powder continuous extrusion drying device and a wood powder continuous extrusion drying process.
Background
The wood-plastic composite material is a novel composite material which has the double performances of plastic processing performance and wood texture and is prepared by fully utilizing agricultural and forestry wastes and plastic reclaimed materials. The content of plant fiber which is the main raw material of the wood-plastic composite material is usually more than 50 percent, so the physical and mechanical properties of the composite material are directly influenced by the performance of the wood powder. Wood flour is a strong-polarity natural raw material which is easy to absorb water, not only originally contains a large amount of bound water and free water in the interior, but also easily absorbs water from the environment in the storage process. The compatibility between polar wood flour and non-polar plastic resin is not good, if the wood flour contains too high moisture, the compatibility between wood flour fiber and resin matrix can be weakened, the effect of maleic acid stem graft serving as a compatilizer can be greatly weakened, and the mechanical property of the composite material is seriously influenced. On the other hand, the excessively high water content in the wood powder can convert water molecules into water vapor in the processing process of the composite material, so that the unstable phenomenon in the extrusion and injection molding processes is caused, and the phenomena are represented as irregular foaming, abrupt change of mechanical properties and melt fracture caused by local excessively high water vapor pressure in the composite material.
Traditional wood flour drying device adopts high temperature air dispersion wood flour and long distance circulation in the pipeline, reaches the dry purpose of dust, and this kind of technology produces the accident because of high temperature air temperature very easily takes place the burning with wood flour, production safety is difficult to control.
Disclosure of Invention
The invention provides a wood powder continuous extrusion drying device and a process thereof, aiming at the technical problems of long drying process and large potential safety hazard of the wood powder moisture content for filling wood-plastic composite materials.
The specific technical scheme of the invention is as follows:
the utility model provides a drying device is extruded in succession to wood flour, includes the feed cylinder, is provided with the screw rod in the feed cylinder, and the screw rod divide into spiral shell arris and the tensile arris two parts of annular, and the screw rod is driven by the motor and rotates, and the feed cylinder front end is provided with the hopper feeding, and end connection aggregate storehouse, aggregate storehouse communicate to the storage silo by the conveying pipe, and the storage silo lower part has connect the discharge gate.
Preferably, the upper part of the charging barrel is provided with a natural exhaust hole.
Preferably, heaters are arranged on the outer wall of the barrel and the outer side of the screw.
Preferably, one end of the feeding pipe is provided with an air inlet, so that air can be blown in to ensure smooth feeding.
Preferably, the top end of the storage bin is provided with an exhaust port.
Preferably, a discharging switch is arranged on the discharging port to control discharging.
Preferably, the spiral rib is of a single-thread spiral structure, and the section of the annular stretching rib in the vertical direction is circular or elliptical.
Preferably, the rotation axis of the annular stretching rib is collinear with the axis of the screw.
A continuous extrusion drying process for wood powder comprises the following steps:
s1: putting the wet wood powder into a hopper, feeding the wood powder into a charging barrel under the action of self weight, heating the screw and the charging barrel to 90-130 ℃, conveying the wood powder forwards under the pushing action of a screw ridge of the screw to continuously evaporate water, and discharging the wood powder from a natural exhaust port;
s2: when the wood flour is conveyed to the annular stretching arrises, the wood flour distributed among the spiral arrises is redistributed in the direction vertical to the screw shaft under the stretching action of the arc-shaped curved surfaces of the annular stretching arrises, the wood flour layer becomes thinner, the wood flour is heated more uniformly, and moisture is quickly emitted;
s3: the wood powder after thorough drying enters a material collecting bin at the tail end of a charging barrel;
s4: air is blown into an air inlet at the tail end of the feeding pipe, the dried wood powder is fed into the storage bin through the feeding pipe, the blown air is discharged through an air outlet, the wood powder is discharged through a discharge switch, and the wood powder is collected, packaged and warehoused through a discharge outlet.
According to the invention, the wood powder is dried by introducing the heated screw and the heated charging barrel, and particularly, the annular stretching edge is added on the screw structure, so that the wood powder layer can be continuously thinned in the screw, the contact between the screw and the charging barrel is increased, and the drying efficiency is improved. The lowest moisture content of the wood powder dried by the process can reach 0.2 percent, and the drying efficiency can reach 25kg/h (water).
Drawings
FIG. 1 is a schematic structural diagram of a wood powder continuous extrusion drying device according to the present invention.
1. A hopper; 2. a charging barrel; 3. a screw; 4. a screw edge; 5. annularly stretching the edge; 6. a natural exhaust port; 7. a material collecting bin; 8. an air inlet; 9. a feed pipe; 10. a storage bin; 11. an exhaust port; 12. a discharge port; 13. and (7) a discharging switch.
Detailed Description
The invention is further illustrated by the following specific examples. The starting materials and methods employed in the examples of the present invention are those conventionally available in the market and conventionally used in the art, unless otherwise specified.
Example 1
The utility model provides a wood flour is drying device in succession extruded, including feed cylinder 2, be provided with screw rod 3 in the feed cylinder 2, the outer wall of feed cylinder 2 and the screw rod outside set up the heater (through resistance heating or galvanic couple heating mode), screw rod 3 divide into spiral shell arris 4 and 5 two parts of annular tensile arris, screw rod 3 is driven by the motor and is rotated, 2 front ends of feed cylinder are provided with hopper 1 feeding, end connection aggregate bin 7, 1 upper portion of feed cylinder is equipped with natural exhaust hole 6, aggregate bin 7 communicates to storage silo 10 by conveying pipe 9, conveying pipe 9 one end is equipped with air inlet 8, can the air of blowing in makes the pay-off smooth and easy, storage silo 10 lower part has connect discharge gate 12, the top is equipped with gas vent 11, set up discharge switch. The spiral rib 3 is of a single-thread spiral structure, the section of the annular stretching rib 5 in the vertical direction is circular or elliptical, and the rotating shaft of the annular stretching rib 5 is collinear with the axis of the screw.
Example 2
A continuous extrusion drying process for wood powder comprises the following steps:
s1: placing the wet wood powder into a hopper 1, feeding the wood powder into a material barrel 2 under the action of self weight, heating the screw rod 3 and the material barrel 2 to 110 ℃ (the temperature can be in the range of 90-130 ℃), conveying the wood powder forwards under the pushing action of a screw rib 4 of the screw rod 3, and continuously evaporating water and discharging the water from a natural exhaust port 6;
s2: when the wood flour is conveyed to the annular stretching arris 5, the wood flour distributed among the spiral arris 4 is redistributed in the direction vertical to the screw shaft under the stretching action of the arc-shaped curved surface of the annular stretching arris 5, the wood flour layer becomes thinner, the wood flour is heated more uniformly, and moisture is rapidly diffused;
s3: the completely dried wood powder enters a material collecting bin 7 at the tail end of the charging barrel 1;
s4: air is blown into an air inlet 8 at the tail end of a feeding pipe 9, dried wood powder is fed into a storage bin 10 through the feeding pipe 9, the blown air is discharged through an air outlet 11, a discharging switch 13 controls discharging of the wood powder, and the wood powder is collected, packaged and stored in a warehouse through a discharging port 12.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (9)
1. The utility model provides a drying device is extruded in succession to wood flour, includes the feed cylinder, its characterized in that is provided with the screw rod in the feed cylinder, and the screw rod divide into spiral shell arris and the tensile arris two parts of annular, and the screw rod is driven by the motor and rotates, and the feed cylinder front end is provided with the hopper feeding, and end connection aggregate storehouse, aggregate storehouse communicate to the storage silo by the conveying pipe, and the storage silo lower part has connect the discharge gate.
2. The wood flour continuous extrusion drying device according to claim 1, wherein the upper part of the charging barrel is provided with a natural air vent.
3. The wood flour continuous extrusion drying device according to claim 2, wherein heaters are provided on the outer wall of the barrel and the outside of the screw.
4. The wood flour continuous extrusion drying device according to claim 1, wherein an air inlet is provided at one end of the feeding pipe, and air can be blown in to make feeding smooth.
5. The wood flour continuous extrusion drying device according to claim 1, wherein the top end of the storage bin is provided with an air outlet.
6. The wood flour continuous extrusion drying device according to claim 1, wherein a discharging switch is arranged on the discharging port to control discharging.
7. The wood flour continuous extrusion drying device according to claim 1, wherein the screw rib is a single screw thread screw structure, and the cross section of the annular stretching rib in the vertical direction is circular or elliptical.
8. The wood flour continuous extrusion drying device of claim 6, wherein the rotation axis of the annular stretching rib is collinear with the axis of the screw.
9. The drying process of the wood flour continuous extrusion drying device based on claim 1 is characterized by comprising the following steps:
s1: wood powder is put into the charging barrel from the hopper, the screw rod and the charging barrel are heated, the screw arris pushes the wood powder to be conveyed forwards, and water is continuously evaporated and discharged from the natural gas outlet;
s2: when the wood flour is conveyed to the annular stretching arris, the wood flour redistributed with the wood flour layer to be thinned, the heating is more uniform, and the moisture is quickly emitted;
s3: the wood powder after thorough drying enters a material collecting bin at the tail end of a charging barrel;
s4: air is blown into an air inlet at the tail end of the feeding pipe, the dried wood powder is fed into the storage bin through the feeding pipe, the blown air is discharged through an air outlet, the discharge port is controlled by a discharge switch, and the wood powder is collected, packaged and warehoused through the discharge port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911079953.0A CN110887369A (en) | 2019-11-07 | 2019-11-07 | Wood powder continuous extrusion drying device and process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911079953.0A CN110887369A (en) | 2019-11-07 | 2019-11-07 | Wood powder continuous extrusion drying device and process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110887369A true CN110887369A (en) | 2020-03-17 |
Family
ID=69746943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911079953.0A Pending CN110887369A (en) | 2019-11-07 | 2019-11-07 | Wood powder continuous extrusion drying device and process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110887369A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113894908A (en) * | 2021-09-30 | 2022-01-07 | 湖南华联瓷业股份有限公司 | Injection molding machine for producing special ceramics |
| CN114294937A (en) * | 2022-03-09 | 2022-04-08 | 济南趵突泉酿酒有限责任公司 | Distiller's yeast drying device is used in distiller's yeast processing |
Citations (7)
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|---|---|---|---|---|
| KR20140115851A (en) * | 2013-03-22 | 2014-10-01 | 주식회사 뉴텍 | Dryer for sawdust of mushroom cultivate |
| CN205287995U (en) * | 2016-01-20 | 2016-06-08 | 宁波钛安新材料科技有限公司 | Serialization powder collection device |
| CN205870884U (en) * | 2016-08-09 | 2017-01-11 | 郑州鼎力新能源技术有限公司 | Take screw feeding device's mixing system |
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| CN106965406A (en) * | 2017-05-02 | 2017-07-21 | 安徽国登管业科技有限公司 | A kind of modified plastic extruder |
| CN108380137A (en) * | 2018-03-07 | 2018-08-10 | 霍尔果斯汉智医药科技有限公司 | A kind of multi-functional pellet granulator |
| CN109719924A (en) * | 2019-03-29 | 2019-05-07 | 常州工程职业技术学院 | A kind of foaming waste material low temperature splits bubble extruder and extrusion method |
-
2019
- 2019-11-07 CN CN201911079953.0A patent/CN110887369A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140115851A (en) * | 2013-03-22 | 2014-10-01 | 주식회사 뉴텍 | Dryer for sawdust of mushroom cultivate |
| CN205287995U (en) * | 2016-01-20 | 2016-06-08 | 宁波钛安新材料科技有限公司 | Serialization powder collection device |
| CN205870884U (en) * | 2016-08-09 | 2017-01-11 | 郑州鼎力新能源技术有限公司 | Take screw feeding device's mixing system |
| CN206140852U (en) * | 2016-11-04 | 2017-05-03 | 云南亨财管道有限公司 | High -ductility pipe extruder |
| CN106965406A (en) * | 2017-05-02 | 2017-07-21 | 安徽国登管业科技有限公司 | A kind of modified plastic extruder |
| CN108380137A (en) * | 2018-03-07 | 2018-08-10 | 霍尔果斯汉智医药科技有限公司 | A kind of multi-functional pellet granulator |
| CN109719924A (en) * | 2019-03-29 | 2019-05-07 | 常州工程职业技术学院 | A kind of foaming waste material low temperature splits bubble extruder and extrusion method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113894908A (en) * | 2021-09-30 | 2022-01-07 | 湖南华联瓷业股份有限公司 | Injection molding machine for producing special ceramics |
| CN114294937A (en) * | 2022-03-09 | 2022-04-08 | 济南趵突泉酿酒有限责任公司 | Distiller's yeast drying device is used in distiller's yeast processing |
| CN114294937B (en) * | 2022-03-09 | 2022-05-10 | 济南趵突泉酿酒有限责任公司 | Distiller's yeast drying device is used in distiller's yeast processing |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20200317 |