A method for manufacturing any one of long bamboo integrated materials

Abstract

The application discloses a manufacturing method of any long bamboo integrated material, which is characterized by the following steps: sawing and milling the two ends of a plurality of bamboo pieces with the same width after fine planing to form connecting heads; uniformly gluing the two planes of the bamboo pieces; placing a plurality of bamboo pieces in a side-standing mode on a conveying mechanism, and connecting, hooking or coupling the connecting heads of the front and back bamboo pieces, and setting the interfaces of the adjacent bamboo pieces in a staggered mode; determining the number of the bamboo pieces during the assembly according to the width of the required bamboo integrated material and the thickness of the bamboo pieces, and binding the bamboo pieces of the corresponding number to form an assembly by using an automatic binding device; cutting the lengthened assembly after the binding according to requirements; and pressing the cut assembly to form a bamboo integrated material. The application has the advantages of high automation degree in the lengthening and assembly process, good interface stability without separate gluing and curing of the interface, low energy consumption and good product quality.

Description

Technical Field

[0001] This invention relates to the field of wood and bamboo laminated timber production and processing technology, and in particular to a method for manufacturing any type of long bamboo laminated timber. Background Technology

[0002] Bamboo, as an abundant renewable resource, boasts advantages such as rapid growth, high yield, and good wood-substituting properties, making it one of the best plant-based raw materials for structural applications. It exhibits high strength, good elasticity, stable performance, and easy processing. Bamboo's specific strength and specific stiffness surpass those of wood and ordinary steel, allowing for widespread use in construction engineering and structural applications. Therefore, bamboo is an ideal material for manufacturing lightweight van flooring and building structural components.

[0003] Currently, the existing technology for bamboo laminated timber involves joining bamboo strips together, applying glue, manually assembling the strips, and then hot-pressing or cold-pressing them. This process requires manual assembly of the bamboo strips after joining, which is time-consuming, labor-intensive, and inefficient, failing to meet the industrialization goals of improving quality and efficiency. Chinese Patent Publication No. CN113276230A discloses an intelligent device for the continuous splicing of bamboo strips with automatic sorting. This device uses a high-frequency hot press to quickly glue the joints of the automatically sorted bamboo strips, achieving a degree of automation. However, the high energy consumption of the high-frequency hot press is incompatible with the need for enterprises to further reduce costs in response to market competition. If conventional hot or cold presses are used instead of the high-frequency hot press, the gluing time for splicing the bamboo strips is long, the splicing efficiency is low, and the joint quality is poor, failing to meet the needs of automated production. Therefore, there is an urgent need for an automated production method for bamboo laminated timber that is energy-efficient and produces high-quality products. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a method for manufacturing any long bamboo laminated timber with low energy consumption and high product quality.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A method for manufacturing any type of long bamboo laminated timber includes the following steps:

[0007] S01, saw-milled joint: multiple bamboo strips of equal width that have been precision planed are saw-milled at both ends to form a joint;

[0008] S02, Bamboo strip adhesive: Apply adhesive evenly to both surfaces of the bamboo strip;

[0009] S03, bamboo strip connection: multiple bamboo strips are placed sideways on the conveying mechanism, and the connecting heads of the front and rear bamboo strips are hooked, finger-jointed, or butted together to couple with each other, and the interfaces of adjacent bamboo strips are staggered.

[0010] S04, binding group blank: according to the width of the required bamboo integrated material and the thickness of the bamboo piece, the number of bamboo pieces is determined when the group blank is determined, and the corresponding number of bamboo pieces is bound to form a whole by using an automatic binding device;

[0011] The automatic binding device comprises an intelligent control system and a pressing mechanism, a winding mechanism, a knotting or bonding mechanism, a cutting mechanism and a clamping mechanism electrically connected with the intelligent control system, and the conveying mechanism comprises rear conveying members and front conveying members arranged at intervals, when the front and rear ends of the group blank bamboo pieces are located at the rear conveying members and the front conveying members respectively, the following steps are used for binding the group blank:

[0012] A01, the pressing mechanism presses the bamboo pieces on the conveying mechanism;

[0013] A02, the winding mechanism winds the binding rope on the group blank bamboo pieces

[0014] A03, the knotting or bonding mechanism knots or bonds the binding rope;

[0015] A04, the cutting mechanism cuts the knotted binding rope;

[0016] A05, the pressing mechanism loosens the bamboo pieces;

[0017] A06, the clamping mechanism clamps the bound group blank piece and drives the group blank piece to move forward;

[0018] S05, arbitrary cutting: the bound group blank piece is cut according to needs;

[0019] S06, pressing forming: the cut group blank piece is put into a hot press or a cold press to be pressed and formed to obtain the bamboo integrated material.

[0020] As a further improvement of the above technical solution: in the step S01, the connecting head is a hook joint or a finger joint.

[0021] In the step S01, when the connecting head is a hook joint, the hook joints at the front and rear ends of the same bamboo piece are symmetrically arranged about the center axis of the bamboo piece.

[0022] The hook joint comprises a first face, a second face, a third face, a fourth face and a fifth face connected in sequence, the third face, the fourth face and the fifth face form a protruding part, the first face, the second face and the third face form a recessed part, and the protruding parts and the recessed parts of the similar hook joints of adjacent bamboo pieces are matched respectively;

[0023] The first face and the fifth face are inclined faces, the second face and the fourth face are flat faces, and the third face is an inclined face or a vertical face.

[0024] When the connecting head is a finger joint, the front and rear bamboo pieces are connected by squeezing the rear bamboo piece into the front bamboo piece.

[0025] The step A06 is followed by a step A07 of repeating the steps A01 to A06 until the corresponding number of bamboo pieces are bundled to form a whole.

[0026] The pressing mechanism comprises support columns, pressing plates and pressing driving members, the support columns are arranged on both sides of the conveying mechanism, the pressing plates are arranged on the upper portions of the support columns and can move up and down along the support columns under the driving of the pressing driving members to press the bamboo pieces on the conveying mechanism, and the pressing driving members are electrically connected with the intelligent control system.

[0027] The winding mechanism is located between the rear conveying member and the front conveying member and comprises a fixed frame, a feeding member and a winding driving member, the feeding member is connected to the fixed frame and can rotate relative to the fixed frame under the driving of the winding driving member and wind the binding rope on the feeding member on the group of bamboo pieces, and the winding driving member is electrically connected with the intelligent control system.

[0028] One end of the binding rope is fixed to one end of the knotting or bonding mechanism, and the other end is connected to the feeding member.

[0029] The clamping mechanism is located on the rear conveying member and comprises a bottom plate, clamping claws, a clamping driving member and a bottom plate driving member, the bottom plate is located between the bamboo pieces and the rear conveying member, the clamping claws clamp the bamboo pieces under the driving of the clamping driving member, and the bottom plate driving member drives the bottom plate to move on the rear conveying member.

[0030] Preferably, in the step S2, the adhesive is one or more of phenolic resin glue, urea-formaldehyde resin glue, polyurethane glue or resorcinol glue.

[0031] Compared with the prior art, the present application has the following advantages:

[0032] The present application is a method for manufacturing an arbitrary long bamboo integrated material, which connects bamboo pieces (bamboo piece connection), bundles groups of pieces, and cuts according to needs through an automatic bundling device and a conveying mechanism to realize automatic connection and manufacturing, the interface does not need to be separately glued and cured, the interface stability is good, the energy consumption is low, and the product quality is good, solving the problem that the existing hooking and lengthening can only be manually hooked and connected and then bundled with adhesive tape to produce groups of pieces, the production efficiency is extremely low, and the lengthened bamboo piece group of pieces process is prone to joint loosening, unevenness, and other lengthened product quality problems such as gaps in plate pressing.

[0033] The manufacturing method of any long bamboo integrated material of the present application is characterized in that the intelligent control system controls the automatic production and manufacturing of the feeding device and the automatic binding device in the bamboo piece lapping and assembling process according to the required length of the plate, the bamboo piece lengthening, online binding and assembling, automatic cutting, the unlimited extension of the bamboo piece lapping, the close cooperation of the equipment binding and assembling and the required cutting, the synchronous performance, the continuous and efficient production of any long plate, the jointing of the bamboo piece lengthening without the use of high frequency lengthening, the meeting of the joint strength requirement, the movement of the lengthened bamboo piece, the use of the ordinary hot press in the pressing forming step, the low energy consumption, the high automation degree and the stable product quality. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is the process flow chart of the present application.

[0035] Figure 2 is the flow chart of the binding and assembling of the present application.

[0036] Figure 3 is the schematic diagram of the hooking tooth in some embodiments of the present application.

[0037] Figure 4 is the schematic diagram of the hooking tooth in another embodiment of the present application.

[0038] Figure 5 is the schematic diagram of the hooking tooth in another embodiment of the present application.

[0039] Figure 6 is the structural schematic diagram of the automatic binding device of the present application.

[0040] Figure 7 is the structural schematic diagram of the pressing mechanism of the present application.

[0041] Figure 8 is the structural schematic diagram of the winding mechanism of the present application.

[0042] Figure 9 is the structural schematic diagram of the clamping mechanism of the present application.

[0043] Figure 10 is the structural schematic diagram of the knotting or bonding mechanism of the present application.

[0044] Figure 11 is the flow chart of the binding and assembling of the comparative example 1 of the present application.

[0045] Figure 12 is the structural schematic diagram of the automatic clamping device of the comparative example 1 of the present application.

[0046] The various reference numerals in the drawings represent:

[0047] 1, conveying mechanism; 102, rear conveying piece; 101, front conveying piece; 2, pressing mechanism; 201, support column; 202, pressing plate; 3, winding mechanism; 301, fixed frame; 302, feeding piece; 4, knotting or bonding mechanism; 401, clamping plate; 402, rotating piece; 403, rope grabbing piece; 5, cutting mechanism; 6, intelligent control system; 7, binding rope; 8, clamping mechanism; 801, bottom plate; 802, clamping claw; 901, first surface; 902, second surface; 903, third surface; 904, fourth surface; 905, fifth surface. DETAILED DESCRIPTION

[0048] The application will be further described below. Unless otherwise specified, the instruments or materials used in the present application are commercially available.

[0049] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0050] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0051] In the present application, unless otherwise specifically defined and limited, the terms "assembly", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In the present application, the term "any length" means "any length", and the term "coupling lap joint" means that the two ends of the bamboo piece can be connected to the length, and there is no front-back order requirement for the two ends of the bamboo piece.

[0053] Example 1

[0054] As Figure 1 andFigure 2 As shown, the manufacturing method of any long bamboo integrated material of the embodiment includes the following steps:

[0055] S01, sawing and milling joint: the two ends of a plurality of planed 2000mm long, 20mm wide, 6mm thick bamboo pieces of the same width are sawed and milled by a saw blade and a milling cutter combination to form a joint;

[0056] S02, bamboo piece gluing: the two planes of the bamboo pieces are uniformly glued with a phenolic resin using a double-sided roller coater;

[0057] S03, bamboo piece connection: a plurality of bamboo pieces are placed upright on the conveying mechanism 1 to be lengthened, the front and rear bamboo piece joints are hooked, pointed or butted, coupled to each other, and the adjacent bamboo piece interfaces are arranged in a staggered manner;

[0058] S04, bundling and assembling: the number of bamboo pieces during assembly is determined according to the width of the required bamboo integrated material and the thickness of the assembled bamboo pieces, and the corresponding number of bamboo pieces are bundled and assembled into a whole using an automatic bundling device during the lengthening process;

[0059] The automatic bundling device includes an intelligent control system 6, a pressing mechanism 2, a winding mechanism 3, a knotting or bonding mechanism 4, a cutting mechanism 5, and a clamping mechanism 8 electrically connected to the intelligent control system 6, and the conveying mechanism 1 includes a rear conveying part 102 and a front conveying part 101 arranged at intervals, when the front and rear ends of the bamboo pieces to be assembled are located at the rear conveying part 102 and the front conveying part 101 respectively, the following steps are used for bundling and assembling:

[0060] A01, the pressing mechanism 2 presses the bamboo pieces on the conveying mechanism 1;

[0061] A02, the winding mechanism 3 winds the bundling rope 7 on the assembled bamboo pieces;

[0062] A03, the knotting or bonding mechanism 4 knots or bonds the bundling rope 7;

[0063] A04, the cutting mechanism 5 cuts off the bundling rope 7 that has been knotted by lifting the cutter;

[0064] A05, the pressing mechanism 2 releases the bamboo pieces;

[0065] A06, the clamping mechanism 8 clamps the lengthened and assembled piece after bundling and moves the assembled piece forward;

[0066] A07, repeat steps A01 to A06 until the lengthened and assembled piece reaches the target length;

[0067] S05, arbitrary cutting: the assembled piece after bundling is arbitrarily cut according to needs;

[0068] S06, press forming: the cut group blank is put into a hot press to form a bamboo integrated material, wherein the hot pressing temperature is 135 DEG C, the time is 15 min, the forward pressure is 0.2 MPa, and the lateral pressure is 0.6 MPa.

[0069] The automatic bundling device of the application adopts the cooperation of the pressing mechanism 2, the winding mechanism 3, the knotting or bonding mechanism 4, the cutting mechanism 5 and the clamping mechanism 8 to realize the automatic lengthening and group blank manufacturing of any long bamboo integrated material plate, solve the technical problems that the existing bamboo chip lengthening interface is easy to loosen and cannot realize automatic group blank manufacturing, only need the cutting mechanism 5 to cut the bundled rope 7 after knotting, can cancel the bundling personnel, improve the bundling quality stability and reduce the bundling energy consumption, and is an important means to realize the unlimited lengthening and online group blank manufacturing of the bamboo chip unit for manufacturing any long bamboo integrated material.

[0070] The intelligent control system 6 issues instructions for starting or closing the pressing mechanism 2, the winding mechanism 3, the knotting or bonding mechanism 4, the cutting mechanism 5 and the clamping mechanism 8, and controls the implementation of the whole process. The specific working principle is as follows:

[0071] B1, the intelligent control system 6 issues an instruction for pressing the bamboo chip to the pressing mechanism 2, and the pressing mechanism 2 presses the bamboo chip;

[0072] B2, the pressure sensor on the pressing mechanism 2 detects the pressing force, and when the pressing force reaches the target value, the intelligent control system 6 issues an instruction for winding the bamboo chip to the winding mechanism 3, and the winding mechanism 3 winds the bamboo chip; otherwise, the intelligent control system 6 issues the instruction for winding the bamboo chip after the pressing force reaches the target value;

[0073] B3, the detection sensor on the knotting or bonding mechanism 4 detects whether the bundled rope 7 reaches the specified position, if yes, the intelligent control system 6 issues a knotting or bonding movement instruction to the knotting or bonding mechanism 4, and the knotting or bonding mechanism 4 knots or bonds the bundled rope 7, otherwise, the intelligent control system 6 issues the knotting movement instruction until the bundled rope 7 reaches the specified position;

[0074] B4, the intelligent control system 6 issues an instruction for cutting the bundled rope 7 to the cutting mechanism 5, and the cutting mechanism 5 cuts the knotted bundled rope 7;

[0075] B5, the intelligent control system 6 issues an instruction for loosening the bamboo chip to the pressing mechanism 2, and the pressing mechanism 2 loosens the bamboo chip;

[0076] B6, the intelligent control system 6 issues an instruction for clamping and moving to the clamping mechanism 8, and the clamping mechanism 8 clamps and moves the group blank forward;

[0077] B7, repeat steps B1 to B6.

[0078] In this embodiment, when binding the bamboo strips in step S04, the bamboo strip connection in step S03 can be performed simultaneously when the pressing mechanism 2 presses the bamboo strips. In other embodiments, the hot-pressing temperature, time, and pressure are determined according to the type of adhesive used. For example, the hot-pressing temperature of urea-formaldehyde resin adhesive is 90-100℃, the hot-pressing temperature of phenolic resin adhesive is 130-140℃, and the hot-pressing temperature of other adhesives is determined according to their curing characteristics. The hot press should have a length equivalent to the required bamboo board length; if the length is insufficient, a certain device can be added to the hot press to allow for segmented hot-pressing and curing.

[0079] In step S01, the connector is a hook connector or a finger connector. In this embodiment, the connector is a hook connector.

[0080] In step S01, when the connector is a hook joint, the hook joints at both ends of the same bamboo strip are symmetrically arranged about the central axis of the bamboo strip. After rotating 180 degrees along the length direction, the shape of the hook joint overlaps. Therefore, the bamboo strips can be arbitrarily coupled and overlapped vertically without any difference in direction. The dimensional accuracy is sufficient to ensure that the width of the bamboo strip is consistent after the vertical coupling. Because the extension hook joint used has a symmetrical structure, any two bamboo strips can be extended during extension, solving the problems of existing asymmetrical joints that require sequential end-to-end extension and have high operational requirements. This facilitates the jointing of any two bamboo strips in the same batch.

[0081] like Figure 3 and Figure 4 As shown, the hook joint includes a first surface 901, a second surface 902, a third surface 903, a fourth surface 904, and a fifth surface 905 connected in sequence. The third surface 903, the fourth surface 904, and the fifth surface 905 form a protrusion, and the first surface 901, the second surface 902, and the third surface 903 form a recess. The protrusions and recesses of the hook joints of adjacent bamboo strips fit together respectively. The first surface 901 and the fifth surface 905 are parallel inclined surfaces, the second surface 902 and the fourth surface 904 are parallel planes, and the third surface 903 is an inclined surface or a vertical surface. Compared with the traditional asymmetrical joints at both ends, which require sequential end-to-end connection, the operation is simple and convenient.

[0082] In this embodiment, the second surface 902 and the fourth surface 904 are parallel to the side surface of the bamboo strip, and the first surface 901 and the fifth surface 905 intersect the two side surfaces of the bamboo strip respectively. The distance between the second surface 902 and the adjacent side surface of the bamboo strip is h1, and the distance between the fourth surface 904 and the adjacent side surface of the bamboo strip is h2, satisfying h1=h2.

[0083] like Figure 5As shown, when the connecting head is a finger joint, the front and rear bamboo pieces are connected by squeezing the rear bamboo piece into the front bamboo piece.

[0084] The conveying mechanism 1 can adopt clamping conveying or guide groove conveying and the like. Figure 7 As shown, the pressing mechanism 2 includes support columns 201, pressing plates 202 and pressing driving members, the support columns 201 are arranged on both sides of the conveying mechanism 1, the pressing plates 202 are arranged on the upper portions of the support columns 201 and can move up and down along the support columns 201 under the driving of the pressing driving members to press the bamboo pieces on the conveying mechanism 1, and the pressing driving members are electrically connected with the intelligent control system 6.

[0085] In the embodiment, the pressing driving member is a driving cylinder, the driving cylinder pushes the pressing plate to press the bamboo pieces. In other embodiments, the pressing driving member is a motor, the motor output end drives the pressing plate to press the bamboo pieces through a ball screw, and the same or similar technical effects can be achieved.

[0086] As shown, Figure 8 The winding mechanism 3 is located between the rear conveying member 102 and the front conveying member 101 and includes a fixed frame 301, a feeding member 302 and a winding driving member, the feeding member 302 is connected to the fixed frame 301 and can rotate relative to the fixed frame 301 under the driving of the winding driving member and wind the binding rope 7 on the feeding member 302 on the assembled bamboo pieces, and the winding driving member is electrically connected with the intelligent control system 6.

[0087] In the embodiment, the fixed frame 301 has a through hole, the lengthened bamboo pieces pass through the through hole and are located at both ends of the through hole, the feeding member 302 is provided with the binding rope 7, and one end of the binding rope 7 is fixed above, below or on the side of the bamboo pieces.

[0088] In the embodiment, the fixed frame 301 is arranged with a rotating ring along the circumferential direction of the through hole, the outer circumference of the rotating ring has outer circumferential teeth, the winding driving member includes a driving motor, the output end of the driving motor is connected with a gear, the gear and the outer circumferential teeth are matched, the feeding member is connected to the rotating ring, and the intelligent control system 6 is electrically connected with the driving motor.

[0089] As shown, Figure 10As shown, in this embodiment, the knotting or bonding mechanism 4 is preferably a knotting mechanism. The knotting mechanism is provided with two clamping plates 401 and a rotating member 402. The two clamping plates 401 push the end of the binding rope 7 that is wound through the knotting mechanism to the middle of the two clamping plates 401 to become two segments, and then the rotating member 402 winds the two segments of the rope into a knot. One end of the binding rope 7 is fixed to one end of the knotting mechanism, and the other end is connected to the feeding member 302. In this embodiment, the knotting mechanism is provided with a rope grabbing member 403 below the clamping plate 401. One end of the binding rope 7 is grabbed by the rope grabbing member 403. Before the binding rope 7 is cut off, the rope grabbing member on the knotting mechanism clamps the one end of the binding rope 7 to facilitate subsequent knotting again.

[0090] When the winding mechanism 3 executes a winding instruction each time, the end of the binding rope 7 that is in contact with the bamboo pieces before is the front end, and the end of the binding rope 7 that is in contact with the bamboo pieces last is the end. The front end of the binding rope 7 is grabbed by the rope grabbing member 403. When the feeding member 302 of the winding mechanism 3 rotates around the bamboo pieces, the binding rope 7 is wound on the bamboo pieces. When the winding mechanism 3 executes a winding instruction each time, the front end of the binding rope 7 is clamped by one of the clamping plates 401, and the other clamping plate 401 clamps the end of the binding rope 7. The rope grabbing member 403 grabs the end of the binding rope 7 to facilitate subsequent binding and knotting. The two oppositely arranged clamping plates 401 move close to each other, and the two segments of the binding rope 7 located on the two clamping plates 401 also move close to each other. When the binding rope 7 reaches a position above the rotating member 402, the rotating member 402 winds and knots the two segments of the binding rope 7.

[0091] In other embodiments, the knotting or bonding mechanism 4 can be a bonding mechanism, which includes two clamping plates and a heating device. After the clamping plates push the binding rope 7 to the middle of the two clamping plates to become two segments, the intelligent control system 6 controls the heating device to melt and bond the joint of the binding rope 7. After the binding rope 7 is solidified, it is cut off by the cutting-off mechanism 5.

[0092] In this embodiment, the knotting mechanism is used to knot and cut off the binding rope 7. Compared with melting and cutting off the binding rope 7 by using a heating device, it does not need to wait for the binding rope 7 to melt and solidify. On the one hand, the action is simple and the operation is coherent, which can reduce energy consumption. On the other hand, it saves time in production practice and is beneficial to improve production efficiency.

[0093] As Figure 9As shown, the clamping mechanism 8 is located on the rear conveying member 102, including a base plate 801, clamping jaws 802, a clamping drive, and a base plate drive. The base plate 801 is located between the bamboo pieces and the rear conveying member 102. The clamping jaws 802 are symmetrically arranged above both sides of the base plate 801 and move relative to the base plate 801 under the drive of the clamping drive to clamp the bamboo pieces. The base plate drive drives the base plate to move on the rear conveying member 102. In this embodiment, the rear conveying member 102 is provided with conveying rollers at both ends. The bamboo piece lengthening assembly is located on the conveying rollers. The base plate drive and the clamping drive are motors. The rear conveying member 102 is provided with a sliding rail or a conveying belt between the conveying rollers. After the clamping jaws 802 clamp the bamboo piece lengthening assembly, the sliding rail moves forward with the assembly on the entire clamping mechanism 8. When the sliding rail moves to a specified distance, the intelligent control system 6 sends a command to stop moving. The pressing mechanism 2 again presses the bamboo pieces. The entire process of pressing the bamboo pieces, winding the bamboo pieces, rope knotting, rope cutting, loosening the bamboo pieces, and moving the assembly is repeated.

[0094] The sliding rail movement distance is intelligently controlled according to the required length of the bamboo integrated material. The conveying rollers below the bamboo piece lengthening assembly are driven rollers. The lengthening assembly conveying and distance control can also be directly performed by the driven rollers in combination with sensors.

[0095] Comparative Example 1

[0096] As shown in Figure 11 and 12 , the manufacturing method of any long bamboo integrated material of this comparative example includes the following steps:

[0097] S01, sawing and milling joint: the two ends of a plurality of 1000 mm long, 18 mm wide, and 4 mm thick sized bamboo pieces of the same width after fine planing are sawed and milled by a combination of a saw blade and a milling cutter to form a joint;

[0098] S02, bamboo piece gluing: the two planes of the bamboo pieces are uniformly glued with urea-formaldehyde resin by a double-sided roller coater;

[0099] S03, bamboo piece connection: a plurality of bamboo pieces are placed upright on the conveying mechanism 1 for lengthening. The front and rear bamboo piece joints are butted, hooked, or coupled and overlapped. The interfaces of adjacent bamboo pieces are arranged in a staggered manner;

[0100] S04, bundling assembly: the number of bamboo pieces during assembly is determined according to the width of the required bamboo integrated material and the thickness of the assembly bamboo pieces. The corresponding number of bamboo pieces are clamped and manually bundled to form a whole by using an automatic clamping device during lengthening;

[0101] The automatic clamping device comprises an intelligent control system 6 and a pressing mechanism 2 and a clamping mechanism 8 electrically connected with the intelligent control system 6, and the conveying mechanism 1 comprises rear conveying members 102 and front conveying members 101 arranged at intervals, and the following steps are adopted to bundle the group blanks when the front and rear ends of the group blanks to be spliced are located on the rear conveying members 102 and the front conveying members 101 respectively.

[0102] A01, the pressing mechanism 2 presses the bamboo pieces on the conveying mechanism 1;

[0103] A02, the binding rope 7 is manually wound and knotted on the group blank bamboo pieces and the binding rope 7 is cut off;

[0104] A03, the pressing mechanism 2 releases the bamboo pieces;

[0105] A04, the clamping mechanism 8 clamps the spliced group blank members after binding and drives the group blank members to move forward;

[0106] A05, steps A01 to A02 are repeated until the spliced group blank members reach the target length;

[0107] S05, arbitrary cutting: the group blank members after binding are cut according to needs;

[0108] S06, pressing and forming: the cut group blank members are put into a hot press to be pressed and formed to obtain the bamboo integrated material, wherein the hot pressing temperature is 100℃, the time is 8min, the forward pressure is 0.2MPa, and the lateral pressure is 0.6MPa.

[0109] In other comparative examples, the hot pressing temperature, time and pressure are determined according to the type of adhesive used. For example, the hot pressing temperature of phenolic resin adhesive is 130-140℃, and the hot pressing temperature of other adhesives is determined according to their curing characteristics. The hot press should have a length corresponding to the production of bamboo board, and a certain device can also be added to the hot press for segmented hot pressing and curing.

[0110] In step S01, the connecting head is a hook joint or a finger joint. In this comparative example, the connecting head is a hook joint.

[0111] In step S01, when the connecting head is a hook joint, the hook joints at the front and rear ends of the same bamboo piece are symmetrically arranged about the center axis of the bamboo piece, and after rotating 180 degrees along the length direction, the shapes of the hook joints are overlapped, therefore, the bamboo pieces can be arbitrarily coupled and overlapped without difference in reverse and forward directions, and the size accuracy meets the requirement that the width after coupling and overlapping is consistent with the width of the bamboo piece.

[0112] For example, Figure 3 and Figure 4As shown, the hook joint includes a first surface 901, a second surface 902, a third surface 903, a fourth surface 904, and a fifth surface 905 connected in sequence. The third surface 903, the fourth surface 904, and the fifth surface 905 form a protrusion, and the first surface 901, the second surface 902, and the third surface 903 form a recess. The protrusions and recesses of the hook joints of adjacent bamboo strips fit together respectively. The first surface 901 and the fifth surface 905 are parallel inclined surfaces, the second surface 902 and the fourth surface 904 are parallel planes, and the third surface 903 is an inclined surface or a vertical surface. Compared with the traditional asymmetrical joints at both ends, which require sequential end-to-end connection, the operation is simple and convenient.

[0113] In this comparative example, the second surface 902 and the fourth surface 904 are parallel to the side surface of the bamboo strip, and the first surface 901 and the fifth surface 905 intersect the two side surfaces of the bamboo strip respectively. The distance between the second surface 902 and the side surface of the adjacent bamboo strip is h1, and the distance between the fourth surface 904 and the side surface of the adjacent bamboo strip is h2, satisfying h1=h2.

[0114] like Figure 5 As shown, when the connector is a finger joint, the front and rear bamboo strips are connected by pressing the rear bamboo strip forward into the front bamboo strip. The finger joint teeth fit together horizontally without gaps, and are flush on all four sides.

[0115] like Figure 7 As shown, the pressing mechanism 2 includes a support column 201, a pressure plate 202, and a pressing drive. The support column 201 is arranged on both sides of the conveying mechanism 1, and the pressure plate 202 is arranged on the upper part of the support column 201. Under the drive of the pressing drive, it can move up and down along the support column 201 to press the bamboo strips on the conveying mechanism 1. The pressing drive is electrically connected to the intelligent control system 6.

[0116] In this comparative example, the pressing drive is a drive cylinder, which pushes the pressure plate to squeeze the bamboo strips. In other comparative examples, the pressing drive is a motor, and the motor output drives the pressure plate to squeeze the bamboo strips through a ball screw, which can also achieve the same or similar technical effect.

[0117] like Figure 9 As shown, the clamping mechanism 8 is located on the rear conveyor 102 and includes a base plate 801, clamping claws 802, a clamping drive and a base plate drive. The base plate 801 is located between the bamboo strip and the rear conveyor 102. The clamping claws 802 are symmetrically arranged above both sides of the base plate 801 and move relative to the base plate 801 under the drive of the clamping drive to clamp the bamboo strip. The base plate drive drives the base plate to move on the rear conveyor 102.

[0118] In this comparative example, the rear conveyor 102 has conveying rollers at both ends, and the bamboo strip splicing assembly blank is located on the conveying rollers. In some comparative examples, the base plate drive and clamping drive are motors. The rear conveyor 102 has a slide rail or conveyor belt between the conveying rollers. After the clamping claw 802 clamps the bamboo strip splicing assembly blank, the slide rail moves, carrying the entire assembly blank on the clamping mechanism 8 forward. The slide rail movement distance is intelligently controlled according to the required bamboo composite material length. When the slide rail moves to the specified distance, the intelligent control system 6 issues a command to stop the movement, and the pressing mechanism 2 presses the bamboo strip again, repeating the entire process of pressing the bamboo strip - winding the bamboo strip - knotting the rope - cutting the rope - releasing the bamboo strip - moving the assembly blank. The slide rail movement distance is intelligently controlled according to the required bamboo composite material length. The conveying roller below the bamboo strip splicing assembly blank is a driven roller, or the splicing assembly blank can be directly conveyed and distance controlled by the active conveying roller in conjunction with a sensor (for example, when the sensor detects that the movement distance has reached the target distance, the intelligent control system 6 controls the active conveying roller to stop rotating).

[0119] In this comparative example, the binding and assembly of the blanks is done manually, requiring additional dedicated personnel for binding. This results in low efficiency and high costs for splicing, hindering the company's efforts to reduce costs and increase efficiency in the face of fierce market competition. Manual binding is also highly arbitrary, and it is difficult to control the uniformity of the binding distance. This can lead to incomplete or missing binding at certain joints, causing the joints of the spliced ​​blanks to loosen during movement or pressing. This can result in uneven joints, gaps at the joints of the pressed bamboo composite boards, and other product quality issues.

[0120] Comparative Example 2

[0121] The manufacturing method of any long bamboo laminated timber in this comparative example includes the following steps:

[0122] S01, Saw-milled joint: Multiple bamboo strips of the same width, 2000mm long, 20mm wide, and 6mm thick, after being precision planed, are sawn and milled at both ends using a combination of saw blade and milling cutter to form an asymmetrical hook joint.

[0123] S02, Bamboo strip cutting: Match the bamboo strip length with the required board length. When the required board length is not an integer multiple of the bamboo strip length, the bamboo strips need to be cut.

[0124] S03, Bamboo strip coating: Phenolic resin is evenly coated onto both sides of the bamboo strip using a double-sided roller coating machine.

[0125] S04, bamboo strip connection: multiple bamboo strips are placed on the side of the assembly platform for splicing. The ends of the bamboo strips are strictly connected end to end, and the interfaces of adjacent bamboo strips are staggered.

[0126] S05, Assembly: The extended bamboo strips are manually squeezed together and wrapped with tape to assemble the bamboo. The number of bamboo strips used for assembly is determined according to the required width of the bamboo composite and the thickness of the bamboo strips used for assembly.

[0127] S06, press forming: the cut group blank is put into a hot press or a cold press to form a bamboo integrated material, wherein the hot pressing temperature is 135℃, the time is 15min, the forward pressure is 0.2MPa, and the lateral pressure is 0.6MPa.

[0128] In other comparative examples, the hot pressing temperature, time and pressure are determined according to the type of adhesive used. For example, the hot pressing temperature of urea-formaldehyde resin adhesive is 90-100℃, the hot pressing temperature of phenol-formaldehyde resin adhesive is 130-140℃, and the hot pressing temperature of other adhesives is determined according to their curing characteristics.

[0129] In the present comparative example, the joint shape of the same bamboo piece at the front and rear ends is a conventional asymmetric structure, and the front and rear ends need to be strictly connected during lengthening. The lengthening operation requires high requirements; the group blank is manually squeezed and wrapped with adhesive tape during group blanking, the group blanking efficiency is extremely low, the interface is easy to loosen, and the transportation requirements are high; manual group blanking leads to loosening of part of the interface, and the joint is not flat during pressing, resulting in gaps at the interface of the obtained board; in addition, the lengthening is non-continuous, and part of the bamboo is wasted during cutting, increasing the material and processing cost.

[0130] Comparative Example 3

[0131] The manufacturing method of any long bamboo integrated material in the present comparative example comprises the following steps:

[0132] S01, sawing and milling joint: the two ends of a plurality of 2000mm long, 20mm wide and 6mm thick bamboo pieces of the same width after fine planing are sawed and milled by a combination of saw blade and milling cutter to form a toothed joint;

[0133] S02, joint gluing: the toothed joint at the two ends of the bamboo piece is glued by brushing or spraying;

[0134] S03, bamboo piece lengthening: the glued bamboo pieces are placed in a guide groove, and the lengthened bamboo pieces pass through the roller to squeeze and lengthen in the guide groove, and the joint interface is glued and cured by a high-frequency press, and the adjacent bamboo piece interfaces are arranged in a staggered manner;

[0135] S04, cutting: the continuously lengthened bamboo pieces are automatically cut to the required length, and the length is automatically controlled by a sensor;

[0136] S05, bamboo piece gluing: the two planes of the bamboo piece are uniformly glued with phenol-formaldehyde resin by a double-sided roller coater;

[0137] S06, group blanking: the lengthened bamboo pieces are manually squeezed and wrapped with adhesive tape for group blanking, and the number of bamboo pieces during group blanking is determined according to the width of the required bamboo integrated material and the thickness of the group blanking bamboo pieces;

[0138] S06, press forming: the cut group blank is put into a hot press to form a bamboo integrated material, wherein the hot pressing temperature is 135℃, the time is 15min, the forward pressure is 0.2MPa, and the lateral pressure is 0.6MPa.

[0139] In other comparative examples, the hot pressing temperature, time and pressure are determined according to the type of adhesive used. For example, the hot pressing temperature of urea-formaldehyde resin adhesive is 90-100℃, the hot pressing temperature of phenol-formaldehyde resin adhesive is 130-140℃, and the hot pressing temperature of other adhesives is determined according to their curing characteristics.

[0140] In the present comparative example, high-frequency lengthening or other high-energy consumption interface fast gluing equipment is used to ensure the strength and mobility of the lengthened bamboo joint and to match the lengthening speed of the joint with the automatic lengthening efficiency. However, the high cost of lengthening is not conducive to the company's goal of reducing costs and increasing efficiency in the face of fierce market competition. If the high-frequency press is not used for gluing and curing the bamboo joint during lengthening, and the bamboo pieces are directly glued and then pressed, the joint strength is not enough and the waste rate is high. Therefore, the bamboo lengthening process in the present comparative example needs to add a joint gluing process, which is troublesome and increases costs. If fast gluing and curing equipment for lengthening joints is used, the energy consumption is also high. Moreover, the group blank of lengthened bamboo pieces in the present comparative example is manually wrapped with adhesive tape, which has low operation efficiency.

[0141] Although the present application has been disclosed with reference to the preferred embodiments above, it is not intended to limit the present application. Any person skilled in the art can make many possible changes and modifications to the technical solutions disclosed above, or modify equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application should fall within the scope of protection of the technical solutions of the present application.

Claims

1. A method for manufacturing any type of long bamboo laminated timber, characterized in that: Includes the following steps: S01, saw-milled joint: multiple bamboo strips of equal width that have been precision planed are saw-milled at both ends to form a joint; S02, Bamboo strip adhesive: Apply adhesive evenly to both surfaces of the bamboo strip; S03, bamboo strip connection: Place multiple bamboo strips on the conveying mechanism (1) and let the front and rear bamboo strip connectors hook, finger, or butt together to couple with each other, and let the interfaces of adjacent bamboo strips be staggered. S04, Bundling and Assembling: Determine the number of bamboo strips to be assembled according to the required width and thickness of the bamboo composite material, and use an automatic bundling device to bundle the corresponding number of bamboo strips to form a whole. The automatic bundling device includes an intelligent control system (6) and a pressing mechanism (2), a winding mechanism (3), a knotting or bonding mechanism (4), a cutting mechanism (5), and a clamping mechanism (8) electrically connected to the intelligent control system (6). The conveying mechanism (1) includes a rear conveying component (102) and a front conveying component (101) spaced apart. When the front and rear ends of the bamboo strips to be bundled are located at the rear conveying component (102) and the front conveying component (101) respectively, the following steps are used to bundle and assemble the bamboo strips: A01, The pressing mechanism (2) presses the bamboo strips onto the conveying mechanism (1); A02, the winding mechanism (3) winds the binding rope (7) around the bamboo strips of the assembly. A03, the knotting or bonding mechanism (4) knots or bonds the binding rope (7); A04, the cutting mechanism (5) cuts off the knotted binding rope (7); A05, the clamping mechanism (2) loosens the bamboo strips; A06, Clamping mechanism (8) clamps the bundled extended assembly blank and drives the assembly blank to move forward; The winding mechanism (3) is located between the rear conveyor (102) and the front conveyor (101), and includes a fixed frame (301), a feeding component (302) and a winding drive component. The feeding component (302) is connected to the fixed frame (301) and can rotate relative to the fixed frame (301) under the drive of the winding drive component, and winds the binding rope (7) on the feeding component (302) onto the bamboo strips. The winding drive component is electrically connected to the intelligent control system (6). When binding the bamboo strips in step S04, the bamboo strip connection in step S03 is carried out simultaneously when the pressing mechanism (2) presses the bamboo strips. S05, Arbitrary Cutting: The bound and extended blank can be cut arbitrarily as needed; S06, Press forming: The cut-off spliced ​​blanks are placed into a hot press or cold press and pressed into shape to obtain bamboo laminated timber.

2. The manufacturing method according to claim 1, characterized in that: In step S01, the connector is a hook connector or a finger connector.

3. The manufacturing method according to claim 2, characterized in that: In step S01, when the connector is a hook connector, the hook connectors at both ends of the same bamboo strip are symmetrically arranged about the central axis of the bamboo strip.

4. The manufacturing method according to claim 3, characterized in that: The hook joint includes a first surface (901), a second surface (902), a third surface (903), a fourth surface (904), and a fifth surface (905) connected in sequence. The third surface (903), the fourth surface (904), and the fifth surface (905) form protrusions, and the first surface (901), the second surface (902), and the third surface (903) form recesses. The protrusions and recesses of the hook joints of adjacent bamboo strips are respectively matched. The first surface (901) and the fifth surface (905) are inclined surfaces, the second surface (902) and the fourth surface (904) are planes, and the third surface (903) is an inclined surface or a vertical surface.

5. The manufacturing method according to claim 2, characterized in that: When the connector is a finger joint, the front and rear bamboo strips are connected by pressing the rear bamboo strip forward into the front bamboo strip.

6. The manufacturing method according to claim 1, characterized in that: In step S04, after step A06, there is also step A07: repeat steps A01 to A06 until the corresponding number of bamboo strips are bundled together to form a whole.

7. The manufacturing method according to any one of claims 1 to 6, characterized in that: The pressing mechanism (2) includes a support column (201), a pressure plate (202) and a pressing drive. The support column (201) is located on both sides of the conveying mechanism (1), and the pressure plate (202) is located on the upper part of the support column (201). Under the drive of the pressing drive, it can move up and down along the support column (201) to press the bamboo strips on the conveying mechanism (1). The pressing drive is electrically connected to the intelligent control system (6).

8. The manufacturing method according to any one of claims 1 to 6, characterized in that: One end of the binding rope (7) is fixed to one end of the knotting or bonding mechanism (4), and the other end is connected to the feeding component (302).

9. The manufacturing method according to any one of claims 1 to 6, characterized in that: The clamping mechanism (8) is located on the rear conveyor (102) and includes a base plate (801), a clamping claw (802), a clamping drive and a base plate drive. The base plate (801) is located between the bamboo strip and the rear conveyor (102). The clamping claw (802) clamps the bamboo strip under the drive of the clamping drive. The base plate drive drives the base plate to move on the rear conveyor (102).

Images