1. A continuous extrusion forming device for long fiber straw boards is characterized by comprising a straw feeding device (16) and a straw compression bin (8), wherein the straw compression bin (8) is located under the straw feeding device (16), a reciprocating push-pull oil cylinder device (9) is arranged at the front end of the straw compression bin (8), a straw compression head (10) is arranged between the straw compression bin (8) and the reciprocating push-pull oil cylinder device (9), and the tail end of the straw compression bin (8) is sequentially connected with a heating section (11), a cooling shaping section (12), a traction device (13) and a cutting device (14);

straw material feeding unit (16) are thrown feed bin (2), cohesiveness resin storehouse, coating roller including the straw, the straw is thrown feed bin (2) bottom and is equipped with throws material wheel (3), the straw is thrown and is equipped with the straw passageway under feed bin (2), and straw passageway both sides are equipped with the coating roller respectively, are connected with the cohesiveness resin storehouse on every coating roller.

2. The method for preparing the long fiber straw plate by the continuous extrusion molding equipment of the long fiber straw plate is characterized in that the straw is coated with the cohesive resin on the surface through the straw feeding device (16), the straw raw material coated with the cohesive resin on the surface enters the straw compression bin (8), then the straw raw material coated with the cohesive resin on the surface is pushed into a die cavity of the straw compression bin (8) to be continuously extruded through the reciprocating motion of the reciprocating push-pull oil cylinder device (9), the straw raw material is gradually conveyed to the heating section (11) to be solidified, then the straw raw material is shaped through the cooling shaping section (12), and the straw raw material is made into a continuous and uninterrupted whole plate through the traction device (13) and the cutting device (14).

3. The method for preparing the board as claimed in claim 2, wherein the straw (1) is added into the straw charging bin (2), the charging wheel (3) is rotated, and the straw (1) uniformly falls to the surface of the coating roller; rotating the coating roller, opening a discharge port of the cohesive resin bin at the same time, and coating the surface of the straw (1) with the cohesive resin material; controlling the gap between the coating rollers to enable the straw raw materials coated with the cohesive resin on the surface to uniformly fall into the straw compression bin (8), and quickly closing the bin cover of the straw compression bin (8) after the straw raw materials coated with the cohesive resin on the surface are filled; starting a reciprocating push-pull oil cylinder device (9) to quickly push the straw raw material coated with the adhesive resin on the surface into a straw compression bin (8); then, the reciprocating push-pull oil cylinder device (9) is pulled back through the straw compression head (10), a bin cover of the straw compression bin (8) is opened, straw raw materials with surfaces coated with cohesive resin are put into the bin cover of the straw compression bin (8) after the straw is filled, the reciprocating push-pull oil cylinder device (9) is opened, and the straw raw materials with surfaces coated with the cohesive resin are pushed into the straw compression bin (8) again; compressing according to the continuous circulation work, gradually pushing the straw raw materials into a mold heating section (11) for plasticizing, curing and forming, finally entering a cooling and shaping section (12), fully cooling and shaping, then conveying the board out by a traction device (13), and cutting into fixed-length products (15) with different sizes by a cutting device (14). The method can be used for continuously producing the long-fiber straw board.

4. A method of producing sheet material as claimed in any one of claims 2 or 3 in which the sheet material is produced from: the long fiber straw accounts for 92-93% of the total weight of the board; the bonding resin accounts for 7-8% of the total weight of the plate.

Background

Wood panels are mainly divided into two main categories: solid wood panels and composite panels. The production of solid wood boards requires the consumption of a large amount of wood, and the cutting of a large amount of trees causes great damage to the environment. Therefore, various laws and regulations are set out in China, trees are restricted from being felled to protect green forest resources, the price of solid wood plates is higher and higher, and the application of the material is further restricted.

The straw board is a composite board. Crop straws are byproducts of agricultural production, and China is a big agricultural country, so the yield of the straws is very high. The surplus straw is usually consumed by adopting an incineration method, which inevitably causes environmental pollution. Therefore, the straw is used for manufacturing the board, so that the waste can be utilized, the cost is low, and the benefit is high. The current process for manufacturing straw plates comprises the following steps: crushing straw, mixing with glue, spreading, heating to form, cooling to set, opening the mold and taking out the product. The method has long production period and low efficiency, and simultaneously, the fiber structure is damaged because the fiber becomes shorter (less than 6mm) after the straw is crushed, so that the whole strength of the prepared plate is not high.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides continuous extrusion forming equipment of a long fiber straw board and a preparation method thereof, wherein the long fiber straw is used for directly and continuously producing the straw board; the equipment has simple structure and convenient operation.

The above purpose of the invention is realized by the following technical scheme:

a continuous extrusion forming device for long fiber straw plates comprises a straw feeding device and a straw compression bin, wherein the straw compression bin is located under the straw feeding device, a reciprocating push-pull oil cylinder device is arranged at the front end of the straw compression bin, a straw compression head is arranged between the straw compression bin and the reciprocating push-pull oil cylinder device, and the tail end of the straw compression bin is sequentially connected with a heating section, a cooling shaping section, a traction device and a cutting device;

straw material feeding unit includes that the straw throws feed bin, cohesiveness resin storehouse, coating roller, the straw throws feed bin bottom and is equipped with throws the material wheel, the straw throws and is equipped with the straw passageway under the feed bin, and straw passageway both sides are equipped with the coating roller respectively, are connected with the cohesiveness resin storehouse on every coating roller.

The method for preparing the long fiber straw board by the continuous extrusion forming equipment comprises the following specific steps:

straw passes through straw material feeding unit with its surface coating cohesiveness resin, and the straw raw materials of surface coating cohesiveness resin gets into in the straw compression storehouse, and rethread reciprocating motion of reciprocating push-and-pull hydro-cylinder device pushes the straw raw materials of surface coating cohesiveness resin into straw compression storehouse die cavity and extrudees in succession, progressively sends it to the heating section solidification, and the section is stereotyped in cooling again, makes into continuous, uninterrupted monoblock panel behind draw gear and cut-off device.

Further, the preparation method specifically comprises the following steps: adding straws into a straw feeding bin, rotating a feeding wheel, and uniformly dropping the straws onto the surface of a coating roller (the temperature is 120-150 ℃); rotating the coating roller, opening a discharge port of the cohesive resin bin at the same time, and coating the cohesive resin material on the surface of the straw; controlling the gap between the coating rollers to enable the straw raw materials coated with the cohesive resin on the surface to uniformly fall into the straw compression bin (the temperature is 120-150 ℃), and quickly closing the bin cover of the straw compression bin after the straw raw materials coated with the cohesive resin on the surface are filled; starting a reciprocating push-pull oil cylinder device to quickly push the straw raw material coated with the adhesive resin on the surface into a straw compression bin; then the reciprocating push-pull oil cylinder device is pulled back through the straw compression head, the straw compression bin cover is opened, straw raw materials with the surfaces coated with the cohesive resin are put in, the straw compression bin cover is closed after the straw is filled with the straw, the reciprocating push-pull oil cylinder device is opened, and the straw raw materials with the surfaces coated with the cohesive resin are pushed into the straw compression bin again; compressing according to the continuous cycle work, gradually pushing the straw raw material into a mold heating section for plasticizing (the temperature is 130-200 ℃), solidifying and forming, finally entering a cooling and shaping section, after fully cooling and shaping (the water temperature is 10-60 ℃), conveying the board by a traction device, and cutting the board into fixed-length products with different sizes by a cutting device. The method can be used for continuously producing the long-fiber straw board.

The raw materials for preparing the plate by the preparation method are as follows: the long fiber straw accounts for 92-93% of the total weight of the board; the bonding resin accounts for 7-8% of the total weight of the plate.

Compared with the prior art, the invention has the beneficial effects that:

the invention directly prepares the long fiber straws into the board, the whole straw fiber is not damaged in the preparation process, and the indexes such as length, thickness and the like are not changed, so the whole strength of the prepared board is very high. In addition, as the adhesive resin is coated on the surface of the straw, the brittleness of the adhesive board is overcome, and the board has flat and smooth appearance and high commercial value.

In the production process of the preparation method, the straws are stacked along the direction of the storage bin, the compression head is driven to reciprocate for many times by the push-pull oil cylinder, and under the action of high temperature and high pressure, long-fiber straws are mutually lapped and wound together in a bent shape, so that the strength difference of the longitudinal direction and the transverse direction of the board is small and basically balanced and consistent.

Drawings

The invention is further illustrated with reference to the following figures and examples:

FIG. 1 is a structural diagram of a continuous extrusion molding apparatus for long fiber straw boards according to the present invention.

Fig. 2 is a sectional view a-a of fig. 1.

FIG. 3 is a flow chart of the continuous extrusion molding process of the long fiber straw board.

FIG. 4 is a schematic structural diagram of a continuous extrusion molding apparatus for long fiber straw board and a board manufactured by the method of the present invention.

In the figure, 1, straws, 2, a straw feeding bin, 3, a feeding wheel, 4, a cohesive resin bin A, 5, a cohesive resin bin B, 6, a coating roller A, 7, a coating roller B, 8, a straw compression bin, 9, a reciprocating push-pull oil cylinder device, 10, a straw compression head, 11, a heating section, 12, a cooling shaping section, 13, a traction device, 14, a cutting device, 15, a product and 16, a straw feeding device are arranged.

Detailed Description

The invention is described in more detail below with reference to specific examples, without limiting the scope of the invention. Unless otherwise specified, the experimental methods adopted by the invention are all conventional methods, and experimental equipment, materials, reagents and the like used in the experimental method can be obtained from commercial sources.

Example 1

A continuous extrusion forming device for long fiber straw plates comprises a straw feeding device 16 and a straw compression bin 8, wherein the straw compression bin 8 is located under the straw feeding device 16, a reciprocating push-pull oil cylinder device 9 is arranged at the front end of the straw compression bin 8, a straw compression head 10 is arranged between the straw compression bin 8 and the reciprocating push-pull oil cylinder device 9, and the tail end of the straw compression bin 8 is sequentially connected with a heating section 11, a cooling and shaping section 12, a traction device 13 and a cutting device 14;

straw material feeding unit 16 includes that the straw throws feed bin 2, adhesive resin storehouse, coating roller, the straw is thrown 2 bottoms in feed bin and is equipped with throws the material wheel 3, the straw is thrown and is equipped with the straw passageway under feed bin 2, and straw passageway both sides are equipped with the coating roller respectively, are connected with adhesive resin storehouse on every coating roller.

The method for preparing the long fiber straw board by the continuous extrusion forming equipment comprises the following specific steps:

the straw is coated with the cohesive resin on the surface through the straw feeding device 16, the straw raw material coated with the cohesive resin on the surface enters the straw compression bin 8, and is pushed into a die cavity of the straw compression bin 8 to be continuously extruded through the reciprocating motion of the reciprocating push-pull oil cylinder device 9, and is gradually conveyed to the heating section 11 to be solidified, then is shaped through the cooling shaping section 12, and is made into a continuous and uninterrupted whole plate through the traction device 13 and the cut-off device 14.

Further, the preparation method specifically comprises the following steps: adding the straws 1 into a straw feeding bin 2, rotating a feeding wheel 3, and uniformly dropping the straws 1 onto the surface of a coating roller (the temperature is 120-150 ℃); rotating the coating roller, opening a discharge port of the cohesive resin bin at the same time, and coating the cohesive resin material on the surface of the straw 1; controlling the gap between the coating rollers to enable the straw raw materials coated with the cohesive resin on the surface to uniformly fall into the straw compression bin 8 (the temperature is 120-150 ℃), and quickly closing the bin cover of the straw compression bin 8 after the straw raw materials coated with the cohesive resin on the surface are filled; starting a reciprocating push-pull oil cylinder device 9 to quickly push the straw raw material coated with the adhesive resin on the surface into a straw compression bin 8; then, the reciprocating push-pull oil cylinder device 9 is pulled back through the straw compression head 10, the bin cover of the straw compression bin 8 is opened, straw raw materials with the surfaces coated with the cohesive resin are put in, the bin cover of the straw compression bin 8 is closed after the straw is filled with the straw, the reciprocating push-pull oil cylinder device 9 is opened, and the straw raw materials with the surfaces coated with the cohesive resin are pushed into the straw compression bin 8 again; compressing according to the continuous circulation work, gradually pushing the straw raw material into a mold heating section 11 for plasticizing (with the temperature of 130-200 ℃), solidifying and forming, finally entering a cooling and shaping section 12, after fully cooling and shaping (with the water temperature of 10-60 ℃), conveying the board by a traction device 13, and cutting the board into fixed-length products 15 with different sizes by a cutting device 14. The method can be used for continuously producing the long-fiber straw board.

The raw materials for preparing the plate by the preparation method are as follows: the long fiber straw accounts for 92-93% of the total weight of the board; the bonding resin accounts for 7-8% of the total weight of the plate.

The embodiments described above are merely preferred embodiments of the invention, rather than all possible embodiments of the invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.