Method and system for preparing composite board by continuously pressing straws and waste textiles

Abstract

The invention discloses a method and system for preparing a composite board through continuous pressing of straw and waste textiles, and relates to the technical field of waste utilization, the system comprises a straw preparation unit, a waste spinning preparation unit, a mixed paving forming unit and a continuous flat pressing type hot press which are connected in sequence, and control is achieved through a control unit. The method comprises the following steps: carrying out chopping, fiber tearing and drying treatment on straws, and carrying out fiber regeneration treatment on waste textiles; mixing the two materials with an adhesive in proportion, and paving to form a three-layer blank; and sequentially carrying out pre-pressing, segmented hot-pressing curing, cutting, stack cooling and sanding packaging to obtain a finished product of the composite board. According to the method, resource utilization of the straw and the waste textiles is achieved, and the produced composite board is excellent in physical and mechanical property, high in production efficiency and suitable for large-scale production.

Description

Technical Field

[0001] This invention relates to the field of waste utilization technology, and in particular to a method and system for preparing composite boards by continuous pressing of straw and waste textiles. Background Technology

[0002] Agricultural production always generates a large amount of crop straw, and how to recycle and reuse crop straw has always been a hot topic. Using crop straw to make engineered wood products is a common recycling method. This typically involves thermally grinding the straw into straw fibers or shavings, adding chemical adhesives, and then pressing them into engineered wood products. The disadvantages of this method are that the machines used for thermally grinding the fibers or shavings are energy-intensive, and the amount of chemical adhesives used is large, resulting in high investment costs and insufficient environmental friendliness of the finished products.

[0003] Currently, a technology has emerged that combines crop straw and textile residues to produce straw composite boards. The finished products are characterized by light weight, high strength, low glue usage, and good water resistance. However, the preparation usually adopts an intermittent hot pressing equipment method of mold laying and hot pressing molding. The preparation method and equipment are relatively simple, but the production efficiency is low. Summary of the Invention

[0004] The purpose of this invention is to provide a method and system for preparing composite boards by continuous pressing of straw and waste textiles, so as to solve the problems existing in the prior art and improve production efficiency.

[0005] To achieve the above objectives, the present invention provides the following solution: This invention provides a system for continuously pressing composite boards using straw and waste textiles, comprising: The straw preparation unit includes a first feeder, a straw chopper, a fiber shredder, a dryer, and a first metering bin connected in sequence. The waste textile preparation unit includes a second feeding machine, a waste textile fiber recycling machine, and a second metering bin connected in sequence. A mixed-layout forming unit includes a mixing mixer, a disc distributor, an upper surface laying machine, a lower surface laying machine, a core layer laying machine, a blank conveyor belt, and a pre-pressor. The discharge ports of the first and second metering chambers are respectively connected to the inlet of the mixing mixer. The disc distributor is used to feed the discharge from the mixing mixer into the upper surface laying machine and the lower surface laying machine. The upper surface laying machine, the core layer laying machine, and the lower surface laying machine are all located above the blank conveyor belt. The lower surface laying machine, the core layer laying machine, and the upper surface laying machine are distributed sequentially along the conveying direction of the blank conveyor belt. The pre-pressor is used to pre-press the material on the blank conveyor belt and is located near the discharge end of the blank conveyor belt. A continuous pressing unit, comprising a continuous flat-pressure hot press, wherein the discharge end of the billet conveyor belt is connected to the inlet of the continuous flat-pressure hot press; A control unit is used to control the operation of the mixing machine and the continuous flat-pressure hot press.

[0006] Preferably, the straw shredder includes a first housing, a material dispersing roller, a horizontal shredder shaft, and a vertical shredder shaft. The material dispersing roller, the horizontal shredder shaft, and the vertical shredder shaft are arranged sequentially from top to bottom inside the first housing and are all rotatably engaged with the first housing. A first conveyor belt is provided between the straw shredder and the fiber shredder. The first conveyor belt is used to transport the material at the discharge port of the straw shredder to the feed port of the fiber shredder.

[0007] Preferably, the fiber shredder includes a second housing, shredding blade shafts, a kneading roller, and a spiral conveyor shaft; the shredding blade shaft and the kneading roller are both disposed within the second housing and are rotatably coupled to the second housing; there are two shredding blade shafts, both horizontally arranged side by side, and both located above the kneading roller; the spiral conveyor shaft is disposed within the second housing and is used to convey the material within the second housing to the outlet of the fiber shredder.

[0008] Preferably, the continuous flat-press hot press is provided with a front cylinder, a middle cylinder, and a rear cylinder arranged sequentially from the feed port to the discharge port. The output pressure of the front cylinder and the output pressure of the rear cylinder are both less than the output pressure of the middle cylinder. The continuous flat-press hot press is also provided with an equal pressure bridge beam corresponding to each of the middle cylinders. The equal pressure bridge beam is directly opposite the output end of the corresponding middle cylinder. The equal pressure bridge beam is used to cooperate with the corresponding middle cylinder to press the slab to be processed.

[0009] Preferably, the equal pressure bridge beam is further provided with a fine-tuning cylinder, which is used to drive the lower hot platen of the continuous flat pressure hot press to rise and fall.

[0010] Preferably, a first slab weigher and a second slab weigher are provided below the upper belt of the billet conveyor belt. In the conveying direction of the billet conveyor belt, the first slab weigher is located between the lower surface laying machine and the core layer laying machine, and the second slab weigher is located between the upper surface laying machine and the pre-pressing machine. Both the first slab weigher and the second slab weigher are used to weigh the material on the billet conveyor belt.

[0011] This invention also provides a method for preparing composite boards by continuous pressing of straw and waste textiles. Based on the above-mentioned system for preparing composite boards by continuous pressing of straw and waste textiles, the method includes the following steps: (1) The straw is put into the first feeding machine, so that the straw is successively processed by the straw chopper, the fiber shredder and the dryer before entering the first metering bin; The waste textiles are fed into the second feeding machine so that the waste textiles, after being regenerated by the waste textile fiber recycling machine, enter the second metering bin. (2) The straw blanks in the first metering bin and the waste textile blanks in the second metering bin are fed into the mixing and mixing machine in proportion. The mixing and mixing machine mixes the straw blanks, the waste textile blanks and the adhesive to form a board blank. Then the disc distributor feeds the board blanks into the upper surface laying machine and the lower surface laying machine. The lower surface laying machine lays the lower layer of blanks on the blank conveyor belt, and the upper surface laying machine lays the upper layer of blanks on the lower layer of blanks. The upper layer of blanks and the lower layer of blanks are stacked to form a composite blank. (3) The composite billet is pre-pressed by the pre-pressing machine to form a slab blank; (4) The slab blank is hot-pressed and cured by the continuous flat-press hot press to form a composite board blank; (5) The composite board rough is trimmed and sawn by the cross-cutting sawing unit to form a single board; then, the single board is sorted and cooled and stabilized by the stacking and cooling treatment unit; finally, the single board is sanded and polished, sorted and packaged by the sand sorting and packaging unit to form a composite board finished product that meets the requirements.

[0012] Preferably, in step (2), before the upper layer blank is laid by the upper surface laying machine, the core layer blank is laid on the lower layer blank by the core layer laying machine, and then the upper layer blank is laid on the core layer blank by the upper surface laying machine. The composite blank is formed by stacking the upper layer blank, the core layer blank and the lower layer blank; the core layer blank is a bamboo strip.

[0013] Preferably, in step (4), the hot pressing temperature of the front section of the continuous flat-press hot press is 120~180℃ and the surface pressure is 100~300N / cm², and the hot pressing temperature of the middle section of the continuous flat-press hot press is 180~260℃ and the surface pressure is 400~650N / cm².

[0014] The present invention achieves the following technical effects compared to the prior art: The present invention relates to a method and system for continuously pressing straw and waste textiles to prepare composite boards, which can continuously press straw and waste textiles into composite boards, thereby improving production efficiency. Moreover, the composite boards produced by the present invention have excellent physical and mechanical properties, expanding their practicality. Furthermore, the equipment has a high degree of automation, stable production quality, and effectively improves production efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the system for preparing composite boards by continuous pressing of straw and waste textiles according to the present invention. Figure 2 This is a partial structural schematic diagram of the system for preparing composite boards by continuous pressing of straw and waste textiles according to the present invention. Figure 3 This is a schematic diagram of the continuous flat-press hot press in the system for continuously pressing composite boards using straw and waste textiles according to the present invention. In the diagram: 1. First feeding machine; 2. Straw shredder; 3. Fiber shredder; 4. Dryer; 5. First metering bin; 6. Second feeding machine; 7. Waste textile fiber recycling machine; 8. Second metering bin; 9. Mixing and blending machine; 10. Disc distributor; 11. Lower surface laying machine; 12. Billet conveyor belt; 13. First slab weighing machine; 14. Core layer laying machine; 15. Upper surface laying machine; 16. Second slab weighing machine; 17. Pre-press; 18. Continuous flat-press hot press; 19. Cross-section sawing unit; 20. Density meter; 21. Stacking and cooling treatment unit; 22. Sand sorting and bagging unit; 23. Control unit; 101. Bulk roller; 102. Horizontal crusher shaft; 103. Vertical crusher shaft; 104. First conveyor belt; 105. Tearer shaft; 106. Kneading roller; 107. Screw conveyor shaft; 181. Front hydraulic cylinder; 182. Middle hydraulic cylinder; 183. Rear hydraulic cylinder; 184. Isobaric bridge beam; 185. Fine-tuning hydraulic cylinder; 186. Upper hot press plate; 187. Lower hot press plate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The purpose of this invention is to provide a method and system for preparing composite boards by continuous pressing of straw and waste textiles, so as to solve the problems existing in the prior art and improve production efficiency.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1 like Figures 1 to 3 As shown, this embodiment provides a system for continuously pressing composite boards using straw and waste textiles, comprising: The straw preparation unit includes a first feeder 1, a straw shredder 2, a fiber shredder 3, a dryer 4, and a first metering bin 5 connected in sequence; the fiber shredder 3 is used to process straw into semi-fibrous straw blanks; The waste textile preparation unit includes a second feeding machine 6, a waste textile fiber recycling machine 7, and a second metering bin 8 connected in sequence. The waste textile fiber recycling machine 7 is used to break down, comb, and sort the waste textiles to process them into textile fibers needed for board making. The mixed paving forming unit includes a mixing mixer 9, a disc distributor 10, an upper surface paving machine 15, a lower surface paving machine 11, a core layer paving machine 14, a blank conveyor belt 12, and a pre-press 17. The discharge port of the first metering chamber 5 and the discharge port of the second metering chamber 8 are respectively connected to the inlet of the mixing mixer 9. The disc distributor 10 is used to send the discharge of the mixing mixer 9 into the upper surface paving machine 15 and the lower surface paving machine 11 respectively. The upper surface paving machine 15, the core layer paving machine 14, and the lower surface paving machine 11 are all arranged above the blank conveyor belt 12. The lower surface paving machine 11, the core layer paving machine 14, and the upper surface paving machine 15 are distributed sequentially along the conveying direction of the blank conveyor belt 12. The pre-press 17 is used to pre-press the material on the blank conveyor belt 12, and the pre-press 17 is close to the discharge end of the blank conveyor belt 12. The continuous pressing unit includes a continuous flat-pressure hot press 18, and the discharge end of the billet conveyor belt 12 is connected to the feed port of the continuous flat-pressure hot press 18. Control unit 23 is used to control the operation of the mixing machine 9 and the continuous flat-pressure hot press 18.

[0021] The system for continuously pressing composite boards using straw and waste textiles in this embodiment is also equipped with a post-processing unit. The post-processing unit includes a cross-cutting saw unit 19, a density meter 20, a stacking and cooling treatment unit 21, and a sand sorting and bagging unit 22. The cross-cutting saw unit 19, the density meter 20, the stacking and cooling treatment unit 21, and the sand sorting and bagging unit 22 are all commercially available products familiar to technicians and are commonly used existing post-processing equipment. Therefore, their specific structures and working principles will not be described in detail in this embodiment.

[0022] In the optional scheme of this embodiment, the preferred embodiment is that the straw shredder 2 includes a first housing, a material dispersing roller 101, a horizontal shredder shaft 102, and a vertical shredder shaft 103. The material dispersing roller 101, the horizontal shredder shaft 102, and the vertical shredder shaft 103 are arranged sequentially from top to bottom in the first housing and are all rotatably engaged with the first housing. A first conveyor belt 104 is provided between the straw shredder 2 and the fiber shredder 3. The first conveyor belt 104 is used to transport the material at the discharge port of the straw shredder 2 to the feed port of the fiber shredder 3.

[0023] In the optional embodiments of this example, the preferred embodiment is that the fiber shredder 3 includes a second housing, a shredding blade shaft 105, a kneading roller 106, and a spiral conveyor shaft 107. The shredding blade shaft 105 and the kneading roller 106 are both disposed inside the second housing and are rotatably coupled to the second housing. There are two shredding blade shafts 105, which are horizontal and side by side, and are located above the kneading roller 106. The spiral conveyor shaft 107 is disposed inside the second housing and is used to convey the material inside the second housing to the outlet of the fiber shredder 3.

[0024] In the optional embodiments of this invention, a preferred method is to include a front cylinder 181, a middle cylinder 182, and a rear cylinder 183 arranged sequentially from the inlet to the outlet of the continuous flat-pressure hot press 18. The output pressure of the front cylinder 181 and the output pressure of the rear cylinder 183 are both lower than the output pressure of the middle cylinder 182. The continuous flat-pressure hot press 18 also includes an equal-pressure bridge beam 184 corresponding to the middle cylinder 182. The equal-pressure bridge beam 184 faces the output end of the corresponding middle cylinder 182 and is used to cooperate with the corresponding middle cylinder 182 to press the slab to be processed. A fine-tuning cylinder 185 is also provided on the equal-pressure bridge beam 184. The fine-tuning cylinder 185 is used to drive the lower hot press plate 187 to rise and fall, thereby adjusting the gap between the upper hot press plate 186 and the lower hot press plate 187. It is worth noting that the continuous flat-press hot press 18 is a mature device already existing in the field. The difference between this embodiment and the existing continuous flat-press hot press 18 is that the setting of the oil cylinder has been adjusted and an equal pressure bridge beam 184 has been added. The front oil cylinder 181 and the rear oil cylinder 183 are also present in the existing continuous flat-press hot press 18. However, the middle oil cylinder 182 in this embodiment has a larger output pressure than the oil cylinder in the existing continuous flat-press hot press 18, realizing high pressure pressing. In order to withstand the increased pressure, an equal pressure bridge beam 184 is set for each middle oil cylinder 182. During the operation, the front oil cylinder 181, the middle oil cylinder 182 and the rear oil cylinder 183 all press down on the upper hot press plate 186, and each equal pressure bridge beam 184 supports the lower hot press plate 187 directly below the middle oil cylinder 182. Then, the upper hot press plate 186 and the lower hot press plate 187 are used to press the blank to be processed, thus completing the continuous flat-pressing operation.

[0025] In the optional scheme of this embodiment, a first slab weigher 13 and a second slab weigher 16 are provided below the upper belt of the billet conveyor belt 12. In the conveying direction of the billet conveyor belt 12, the first slab weigher 13 is located between the lower surface laying machine 11 and the core layer laying machine 14, and the second slab weigher 16 is located between the upper surface laying machine 15 and the pre-pressing machine 17. Both the first slab weigher 13 and the second slab weigher 16 are used to weigh the material on the billet conveyor belt 12. Both the first slab weigher 13 and the second slab weigher 16 are connected to the control unit 23 to complete the feedback of weighing information.

[0026] Example 2 This embodiment provides a method for preparing composite boards by continuous pressing of straw and waste textiles, based on the system for preparing composite boards by continuous pressing of straw and waste textiles in Embodiment 1, including the following steps: (1) The straw is fed into the first feeder 1, so that the straw passes through the straw shredder 2 for shredding, the fiber shredder 3 for shredding, and the dryer 4 for drying before entering the first metering chamber 5. Specifically, the loosening roller 101 in the straw shredder 2 loosens the bundled crop straw raw material, and the straw raw material is shredded by the action of the horizontal shredder shaft 102 and the vertical shredder shaft 103. The first feeder 1 feeds the shredded raw material into the fiber shredder 3, and the raw material is torn by the action of the tearing blade shaft 105 to obtain semi-fibrous straw blanks. The blanks fall into the screw conveyor shaft 107 through the kneading roller 106, and then are sent to the dryer 4 for drying to control the moisture content of the blanks. The dried blanks are sent to the first metering chamber 5 for metering. The waste textiles are fed into the second feeding machine 6, so that the waste textiles are processed by the waste textile fiber recycling machine 7 and then enter the second metering bin 8. (2) The straw blanks in the first metering bin 5 and the waste textile blanks in the second metering bin 8 are fed into the mixing and mixing machine 9 in proportion. The specific proportion needs to be determined according to the actual process requirements. Usually, the mixing ratio of waste textile blanks and straw blanks is between 1:1 and 3:1. The straw blank, waste textile blank and adhesive are mixed by the mixing and mixing machine 9 to form the board blank; then the disc feeder 10 feeds the board blank into the upper surface laying machine 15 and the lower surface laying machine 11; the lower surface laying machine 11 lays the lower layer of blank on the blank conveyor belt 12, and the upper surface laying machine 15 lays the upper layer of blank on the lower layer of blank, and the upper and lower layers of blank are stacked to form a composite blank; (3) The composite blank is pre-pressed and degassed by the pre-press machine 17 to form a slab blank with preliminary bonding force; (4) The slab blank is hot-pressed and cured by a continuous flat-press hot press 18 to form a composite board blank; (5) The composite board rough board is trimmed and sawn by the cross-cutting sawing unit 19 to form a single board; then, the single board is sorted and cooled and stabilized by the stacking and cooling treatment unit 21; finally, the single board is sanded and polished, sorted and packaged by the sand sorting and packaging unit 22 to form a composite board finished product that meets the requirements.

[0027] In the optional schemes of this embodiment, it is more preferred to adjust the operating parameters of the mixing machine 9 and the continuous flat-press hot press 18 according to the density detected by the density detector 20, so that the density of a single sheet of board can meet the design requirements.

[0028] In the optional scheme of this embodiment, more preferably, in step (2), before laying the upper layer blank by the upper surface laying machine 15, the core layer blank is laid on the lower layer blank by the core layer laying machine 14, and then the upper layer blank is laid on the core layer blank by the upper surface laying machine 15. The composite blank is formed by stacking the upper layer blank, the core layer blank, and the lower layer blank. The core layer blank is usually optional and can be omitted or retained according to the needs of the product. In this embodiment, the core layer blank is a bamboo strip.

[0029] In the optional schemes of this embodiment, it is more preferred that in step (4), the hot pressing temperature of the front section of the continuous flat-press hot press 18 is 120~180℃ and the surface pressure is 100~300N / cm², and the hot pressing temperature of the middle section of the continuous flat-press hot press 18 is 180~260℃ and the surface pressure is 400~650N / cm².

[0030] In this embodiment, the hot pressing process parameters are digitally and automatically controlled in conjunction with the entire production line. For example, the speed and displacement of the paving machine are related to the characteristic parameters of the preceding material preparation unit equipment, and are adjusted to the required formula values ​​using electrical PID (proportional control, integral control, derivative control) closed-loop control. The continuous pressing hot pressing process also uses electrical PID closed-loop control, mainly organizing the control objectives based on the quality target requirements of the slab material. The PID electrical control algorithm of the PLC central control system is applied to output control values ​​and instructions to the actuators, i.e., controlling the displacement, pressure, temperature, and speed values ​​of the continuous flat-press hot press 18, and relating them to the paving roller height, dispersing roller speed, and metering belt speed of the preceding paving machine, so that the slab… The thickness, weight, and other passive properties of the material are within the required range. The passive material is then tested for mechanical properties by weighing instruments and density detectors 20. The real-time actual values ​​of density, strength, etc. are fed back to the PLC central control system. The electrical control algorithm automatically corrects the values, forming a PID closed-loop control. That is, the post-processing unit feeds back the detected values ​​to the continuous flat-press hot press 18, the continuous flat-press hot press 18 feeds back the control values ​​to the paving machine, and the paving machine feeds back the control values ​​to the material preparation section. From front to back, it runs in an orderly manner at a certain speed and control quantity, and from back to front, it feeds back and adjusts one by one, thereby realizing the intelligent digital control process of achieving the required reasonable board material quality target.

[0031] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A system for continuously pressing composite boards using straw and waste textiles, characterized in that, include: The straw preparation unit includes a first feeder, a straw chopper, a fiber shredder, a dryer, and a first metering bin connected in sequence. The waste textile preparation unit includes a second feeding machine, a waste textile fiber recycling machine, and a second metering bin connected in sequence. A mixed-layout forming unit includes a mixing mixer, a disc distributor, an upper surface laying machine, a lower surface laying machine, a core layer laying machine, a blank conveyor belt, and a pre-pressor. The discharge ports of the first and second metering chambers are respectively connected to the inlet of the mixing mixer. The disc distributor is used to feed the discharge from the mixing mixer into the upper surface laying machine and the lower surface laying machine. The upper surface laying machine, the core layer laying machine, and the lower surface laying machine are all located above the blank conveyor belt. The lower surface laying machine, the core layer laying machine, and the upper surface laying machine are distributed sequentially along the conveying direction of the blank conveyor belt. The pre-pressor is used to pre-press the material on the blank conveyor belt and is located near the discharge end of the blank conveyor belt. A continuous pressing unit, comprising a continuous flat-pressure hot press, wherein the discharge end of the billet conveyor belt is connected to the inlet of the continuous flat-pressure hot press; A control unit is used to control the operation of the mixing machine and the continuous flat-pressure hot press.

2. The system for continuously pressing composite boards using straw and waste textiles according to claim 1, characterized in that: The straw shredder includes a first housing, a material dispersing roller, a horizontal shredder shaft, and a vertical shredder shaft. The material dispersing roller, the horizontal shredder shaft, and the vertical shredder shaft are arranged sequentially from top to bottom inside the first housing and are all rotatably engaged with the first housing. A first conveyor belt is provided between the straw shredder and the fiber shredder. The first conveyor belt is used to transport the material at the discharge port of the straw shredder to the feed port of the fiber shredder.

3. The system for continuously pressing composite boards using straw and waste textiles according to claim 1, characterized in that: The fiber shredder includes a second housing, shredding blade shafts, a kneading roller, and a spiral conveyor shaft. The shredding blade shaft and the kneading roller are both disposed within the second housing and are rotatably coupled to it. There are two shredding blade shafts, both horizontally arranged side by side, and both located above the kneading roller. The spiral conveyor shaft is disposed within the second housing and is used to convey the material within the second housing to the outlet of the fiber shredder.

4. The system for continuously pressing composite boards using straw and waste textiles according to claim 1, characterized in that: The continuous flat-pressure hot press is equipped with a front cylinder, a middle cylinder, and a rear cylinder arranged sequentially from the feed inlet to the discharge outlet. The output pressure of the front cylinder and the output pressure of the rear cylinder are both lower than the output pressure of the middle cylinder. The continuous flat-pressure hot press is also equipped with an equal-pressure bridge beam corresponding to each of the middle cylinders. The equal-pressure bridge beam is directly opposite the output end of the corresponding middle cylinder and is used to cooperate with the corresponding middle cylinder to press the slab to be processed.

5. The system for continuously pressing composite boards using straw and waste textiles according to claim 4, characterized in that: The equal pressure bridge beam is also equipped with a fine-tuning oil cylinder, which is used to drive the lower hot platen of the continuous flat pressure hot press to rise and fall.

6. The system for continuously pressing composite boards using straw and waste textiles according to claim 1, characterized in that: Below the upper layer of the billet conveyor belt, a first billet weigher and a second billet weigher are provided. In the conveying direction of the billet conveyor belt, the first billet weigher is located between the lower surface laying machine and the core layer laying machine, and the second billet weigher is located between the upper surface laying machine and the pre-pressing machine. Both the first billet weigher and the second billet weigher are used to weigh the material on the billet conveyor belt.

7. A method for preparing composite boards by continuous pressing of straw and waste textiles, characterized in that, The system for preparing composite boards by continuous pressing of straw and waste textiles according to any one of claims 1-6 includes the following steps: (1) The straw is put into the first feeding machine, so that the straw is successively processed by the straw chopper, the fiber shredder and the dryer before entering the first metering bin; The waste textiles are fed into the second feeding machine so that the waste textiles, after being regenerated by the waste textile fiber recycling machine, enter the second metering bin. (2) The straw blanks in the first metering bin and the waste textile blanks in the second metering bin are fed into the mixing and mixing machine in proportion. The mixing and mixing machine mixes the straw blanks, the waste textile blanks and the adhesive to form a board blank. Then the disc distributor feeds the board blanks into the upper surface laying machine and the lower surface laying machine. The lower surface laying machine lays the lower layer of blanks on the blank conveyor belt, and the upper surface laying machine lays the upper layer of blanks on the lower layer of blanks. The upper layer of blanks and the lower layer of blanks are stacked to form a composite blank. (3) The composite billet is pre-pressed by the pre-pressing machine to form a slab blank; (4) The slab blank is hot-pressed and cured by the continuous flat-press hot press to form a composite board blank; (5) The composite board rough is trimmed and sawn by the cross-cutting sawing unit to form a single board; then, the single board is sorted and cooled and stabilized by the stacking and cooling treatment unit; finally, the single board is sanded and polished, sorted and packaged by the sand sorting and packaging unit to form a composite board finished product that meets the requirements.

8. The method for preparing composite boards by continuous pressing of straw and waste textiles according to claim 7, characterized in that: In step (2), before the upper layer blank is laid by the upper surface laying machine, the core layer blank is laid on the lower layer blank by the core layer laying machine, and then the upper layer blank is laid on the core layer blank by the upper surface laying machine. The composite blank is formed by stacking the upper layer blank, the core layer blank and the lower layer blank; the core layer blank is a bamboo strip.

9. The method for preparing composite boards by continuous pressing of straw and waste textiles according to claim 7, characterized in that: In step (4), the hot pressing temperature of the front section of the continuous flat-press hot press is 120~180℃ and the surface pressure is 100~300N / cm², and the hot pressing temperature of the middle section of the continuous flat-press hot press is 180~260℃ and the surface pressure is 400~650N / cm².

Images