CN110919894A - Composite board extrusion molding device of high-filling plant fiber/polylactic acid - Google Patents
Composite board extrusion molding device of high-filling plant fiber/polylactic acid Download PDFInfo
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- CN110919894A CN110919894A CN201911079939.0A CN201911079939A CN110919894A CN 110919894 A CN110919894 A CN 110919894A CN 201911079939 A CN201911079939 A CN 201911079939A CN 110919894 A CN110919894 A CN 110919894A
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- China
- Prior art keywords
- plant fiber
- polylactic acid
- molding
- extrusion molding
- die
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
- B29K2067/04—Polyesters derived from hydroxycarboxylic acids
- B29K2067/046—PLA, i.e. polylactic acid or polylactide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2311/00—Use of natural products or their composites, not provided for in groups B29K2201/00 - B29K2309/00, as reinforcement
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of composite board preparation, and discloses a composite board extrusion molding device of high-filling plant fiber/polylactic acid, which comprises a plant fiber particle molding mechanism, a board extrusion molding mechanism and a high-speed mixer for processing materials put into the plant fiber particle molding mechanism; the plant fiber particle forming mechanism comprises a first screw extruder and a die surface granulating mechanism, and comprises a granulating die head which is connected with the screw extruder and is internally provided with a flow channel, an extrusion port die is arranged at the outlet of the flow channel, and a blade for rotary granulating is arranged at the outer side of the extrusion port die; the plate extrusion molding mechanism comprises a second screw extruder for extruding the polylactic acid resin melt, a molding extruder for uniformly mixing the polylactic acid resin melt and the plant fiber particles, and a plate molding die arranged at the tail end of the molding extruder. The plant fiber is firstly made into particles and then mixed with the polylactic acid melt, so that dust in the traditional manufacturing process is greatly reduced, and the heating process of the plant fiber is reduced.
Description
Technical Field
The invention relates to the technical field of composite board preparation, in particular to a composite board extrusion molding device with high filling of plant fiber/polylactic acid.
Background
The wood-plastic composite material fully utilizes agricultural and forestry wastes, is mixed with plastics to prepare the wood-plastic plate through an extrusion molding process, is widely accepted by people in recent years, and forms large-scale application on the market.
The plant fiber in the wood-plastic composite material suitable for extrusion molding is used as a main raw material, the content of the plant fiber is up to more than 60 percent, the plant fiber exists in a powdery form, and the grain diameter is usually 40-100 meshes.
The traditional processing technology is that plastic particles, fine plant fibers and an auxiliary agent are directly mixed at high speed by a high-speed mixer, then extruded and granulated in parallel twin-screws, and finally extruded and molded by conical twin-screws.
In the process, the powdery plant fibers are scattered around in the high-speed movement process, and the production environment is severe. On the other hand, most of the plastic resin is granular, and the plastic resin is easily layered after being mixed with the fine powder plant fiber and transferred to a hopper, so that the plant fiber in the material is unevenly dispersed, and the performance of the material is influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the composite board extrusion molding device with high filling capacity, wherein the plant fiber is uniformly dispersed in the polylactic acid resin.
The purpose of the invention is realized by the following technical scheme:
a composite board extrusion molding device with high filling of plant fiber/polylactic acid comprises a plant fiber particle molding mechanism, a board extrusion molding mechanism and a high-speed mixer for processing materials put into the plant fiber particle molding mechanism; the plant fiber particle forming mechanism comprises a first screw extruder and a die surface granulating mechanism, the die surface granulating mechanism comprises a granulating die head which is connected with the extruding end of the screw extruder and is internally provided with a flow channel, an extruding opening die is arranged at the outlet of the flow channel, and a blade for rotary granulating is arranged on the outer side of the extruding opening die; the plate extrusion molding mechanism comprises a second screw extruder for extruding polylactic resin melt, a molding extruder for uniformly mixing the polylactic resin melt and plant fiber particles from the plant fiber particle molding mechanism, and a plate molding die arranged at the tail end of the molding extruder.
Furthermore, the extrusion port dies are distributed in an annular shape at the outlet of the flow passage.
Furthermore, the die surface pelletizing mechanism also comprises an aggregate cover arranged outside the extrusion die.
Furthermore, a discharge hole is formed in the collecting cover.
Still further, be equipped with first feed inlet on the shaping extruder, first feed inlet position corresponds with the cover discharge gate position of gathering materials.
Still further, still be equipped with the second feed inlet on the shaping extruder, the second feed inlet corresponds with second screw extruder extrusion end position.
Further, the shaping extruder is a single screw extruder or a conical twin-screw extruder.
Further, the materials put into the plant fiber particle forming mechanism are plant fibers and glycerin which are uniformly mixed, and the mass ratio of the plant fibers to the glycerin is 30: 1-10: 1.
furthermore, the mass ratio of the plant fiber to the glycerol is 20: 1.
compared with the prior art, the invention has the following beneficial effects:
1) the materials put into the plant fiber particle forming mechanism are uniformly mixed plant fibers and glycerol, and the materials are uniformly mixed by a high-speed mixer, so that the plant fibers participate in the preparation process in a lumpy manner, and the subsequent dispersion in the polylactic resin is facilitated;
2) plant fibers are firstly made into particles through a plant fiber particle forming mechanism and then mixed with polylactic acid melt in a forming extruder to prepare the high-filling plant fiber/polylactic acid composite board, so that dust in the traditional manufacturing process is greatly reduced, the heating process of the plant fibers is reduced, the bending strength of the finally formed composite board can be improved by 20% and the forming efficiency is improved by 15% compared with the forming process of the traditional process.
Drawings
FIG. 1 is a schematic diagram of the plant fiber pellet forming mechanism of example 1;
fig. 2 is a schematic view of the structure of the plate extrusion molding mechanism according to example 1.
Detailed Description
The present invention will be further described with reference to the following detailed description, wherein the drawings are provided for illustrative purposes only and are not intended to be limiting; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example 1
As shown in fig. 1 and 2, a composite board extrusion molding device of highly filled plant fiber/polylactic acid is provided, which comprises a plant fiber particle molding mechanism (fig. 1), a board extrusion molding mechanism (fig. 2) and a high-speed mixer (not shown) for processing materials fed into the plant fiber particle molding mechanism; the plant fiber particle forming mechanism comprises a first screw extruder 1 and a die surface granulating mechanism 2, a hopper 11 is arranged at the head end of the first screw extruder for adding plant fiber materials, the die surface granulating mechanism 2 comprises a granulating die head 22 which is connected with the extruding end of the screw extruder and is internally provided with a flow channel 21, an extrusion port die 23 is arranged at the outlet of the flow channel, the extrusion port die 23 is annularly distributed at the outlet of the flow channel 21, a blade 24 for rotary granulating is arranged on the outer side of the extrusion port die 23, and the blade immediately cuts off the extruded plant fiber materials.
The plate extrusion molding mechanism is a second-order molding structure and comprises a second screw extruder 3 for extruding polylactic resin melt, a molding extruder 4 for uniformly mixing the polylactic resin melt and plant fiber particles discharged from the plant fiber particle molding mechanism, and a plate molding mold 5 arranged at the tail end of the molding extruder, wherein a funnel 31 is arranged at the head end of the second screw extruder 3 for adding the polylactic resin material.
The first screw extruder 1 and the granulating die head 22 of the plant fiber particle forming mechanism are not heated, and plant fiber melt is extruded at normal temperature, wherein the first screw extruder is a single screw extruder.
In order to accommodate the plant fiber particles cut by the blade 24 instantly, the die face cutting mechanism 2 further comprises an aggregate cover 6 arranged outside the extrusion die, and the plant fiber particles directly fall into the aggregate cover and cannot scatter everywhere.
In addition, still can set up discharge gate 7 on the cover gathers materials, set up first feed inlet 41 simultaneously on shaping extruder 4, first feed inlet 41 position with gather materials cover discharge gate 7 position and correspond for plant fiber granule can continuously last automatic feeding without the manual work and participate in.
In order to further reduce the labor participation cost, the forming extruder 4 can be further provided with a second feeding hole 42, and the second feeding hole 42 corresponds to the extruding end of the second screw extruder 3, so that the polylactic acid resin melt automatically falls into the second feeding hole 42.
The shaping extruder 4 is a single screw extruder or a conical twin-screw extruder.
In the extrusion molding device of this embodiment, the material that drops into plant fiber granule forming mechanism is plant fiber and glycerine of misce bene, and the mass ratio of plant fiber and glycerine is 30: 1-10: 1, preferably 20: the glycerol is uniformly coated on the surface of the plant fiber by the treatment of a high-speed mixer, so that the subsequent agglomeration of the plant fiber and the dispersion in the polylactic resin are facilitated. The polylactic resin material and the plant fiber particles form a uniform composite material under the mixing action of the extrusion molding device, and finally the high-filling plant fiber/polylactic acid composite board is continuously extruded under the shaping action of the board molding die.
It should be understood that the above examples are only for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. A composite board extrusion molding device with high filling of plant fiber/polylactic acid is characterized by comprising a plant fiber particle molding mechanism, a board extrusion molding mechanism and a high-speed mixer for processing materials put into the plant fiber particle molding mechanism; the plant fiber particle forming mechanism comprises a first screw extruder and a die surface granulating mechanism, the die surface granulating mechanism comprises a granulating die head which is connected with the extruding end of the screw extruder and is internally provided with a flow channel, an extruding opening die is arranged at the outlet of the flow channel, and a blade for rotary granulating is arranged on the outer side of the extruding opening die; the plate extrusion molding mechanism comprises a second screw extruder for extruding polylactic resin melt, a molding extruder for uniformly mixing the polylactic resin melt and plant fiber particles from the plant fiber particle molding mechanism, and a plate molding die arranged at the tail end of the molding extruder.
2. The extrusion molding device for composite board with high filling degree of plant fiber/polylactic acid according to claim 1, wherein the extrusion outlet dies are distributed in a ring shape at the outlet of the runner.
3. A composite board extrusion molding device of high filling plant fiber/polylactic acid according to claim 1, wherein the die face granulating mechanism further comprises an aggregate cover arranged outside the extrusion die.
4. The extrusion molding device for composite board with high filling degree of plant fiber/polylactic acid according to claim 3, wherein the aggregate cover is provided with a discharge hole.
5. The extrusion molding device for composite boards with high filling capacity of plant fibers/polylactic acid according to claim 4, wherein the molding extruder is provided with a first feeding hole, and the position of the first feeding hole corresponds to the position of the discharging hole of the material collecting cover.
6. The extrusion molding device for the composite board with high filling capacity of plant fiber/polylactic acid as claimed in claim 1 or 5, wherein the molding extruder is further provided with a second feeding hole, and the second feeding hole corresponds to the extrusion end of the second screw extruder.
7. The extrusion molding device for composite board with high filling of plant fiber/polylactic acid according to claim 1, wherein the molding extruder is a single screw extruder or a conical twin screw extruder.
8. The extrusion molding device for the composite board with high filling capacity of plant fiber/polylactic acid according to claim 1, wherein the materials put into the plant fiber particle molding mechanism are uniformly mixed plant fiber and glycerin, and the mass ratio of the plant fiber to the glycerin is 30: 1-10: 1.
9. the extrusion molding device for the composite board with high filling capacity of plant fiber/polylactic acid according to claim 8, wherein the mass ratio of the plant fiber to the glycerin is 20: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911079939.0A CN110919894A (en) | 2019-11-07 | 2019-11-07 | Composite board extrusion molding device of high-filling plant fiber/polylactic acid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911079939.0A CN110919894A (en) | 2019-11-07 | 2019-11-07 | Composite board extrusion molding device of high-filling plant fiber/polylactic acid |
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| CN110919894A true CN110919894A (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911079939.0A Pending CN110919894A (en) | 2019-11-07 | 2019-11-07 | Composite board extrusion molding device of high-filling plant fiber/polylactic acid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111921616A (en) * | 2020-07-23 | 2020-11-13 | 江苏恒峰线缆有限公司 | High-performance LDPE (Low-Density polyethylene) film material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942140A (en) * | 2010-10-12 | 2011-01-12 | 曾广胜 | Wood plastic composite foaming material and forming process and equipment thereof |
| CN204585623U (en) * | 2015-05-08 | 2015-08-26 | 黄山美森新材料科技有限公司 | A kind of broken apart system of Wood-plastic material |
| CN107160582A (en) * | 2017-07-17 | 2017-09-15 | 浙江晴天木塑科技有限公司 | Multigroup number control granulation unit of natural fiber based high molecular polymer composites |
-
2019
- 2019-11-07 CN CN201911079939.0A patent/CN110919894A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942140A (en) * | 2010-10-12 | 2011-01-12 | 曾广胜 | Wood plastic composite foaming material and forming process and equipment thereof |
| CN204585623U (en) * | 2015-05-08 | 2015-08-26 | 黄山美森新材料科技有限公司 | A kind of broken apart system of Wood-plastic material |
| CN107160582A (en) * | 2017-07-17 | 2017-09-15 | 浙江晴天木塑科技有限公司 | Multigroup number control granulation unit of natural fiber based high molecular polymer composites |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111921616A (en) * | 2020-07-23 | 2020-11-13 | 江苏恒峰线缆有限公司 | High-performance LDPE (Low-Density polyethylene) film material |
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Application publication date: 20200327 |