阅读说明：本技术 一种原生态弧形竹板的加工方法 (Method for processing original ecological arc bamboo board ) 是由 黎志生 于 2021-09-08 设计创作，主要内容包括：本发明公开一种原生态弧形竹板的加工方法,包括破竹、上胶、烘干、热压机模内层叠排板、热压成形,还包括沿竹料送料方向布置的压制设备与热压机,该压制设备包括动模、模座和机架,以及处于模座左侧的左定位块和处于模座右侧的右定位块,动模处于模座的正上方,模座安装在机架上,动模以能向模座移动地安装在机架上,左定位块与右定位块以能相向移动地安装在机架上。与现有技术相比,通过在机架上设置模座左侧的左定位块和处于模座右侧的右定位块,在弧形竹板挤压过程中对产生的夹紧力。在左定位块和右定位块,在的辅助夹紧作用下,极大降低了重组竹材内纤维破坏,减少竹片的裂纹量,提高韧性与抗力能力,极大降低成本。(The invention discloses a processing method of an original ecological arc-shaped bamboo board, which comprises the steps of breaking bamboo, gluing, drying, laminating row boards in a hot press die and hot press forming, and also comprises a pressing device and a hot press which are arranged along the feeding direction of bamboo materials, wherein the pressing device comprises a movable die, a die holder, a rack, a left positioning block positioned on the left side of the die holder and a right positioning block positioned on the right side of the die holder, the movable die is positioned right above the die holder, the die holder is arranged on the rack, the movable die is arranged on the rack in a manner of being capable of moving towards the die holder, and the left positioning block and the right positioning block are arranged on the rack in a manner of being capable of moving towards each other. Compared with the prior art, the clamping force to the production is applied to the arc-shaped bamboo board in the extrusion process by arranging the left positioning block on the left side of the die holder and the right positioning block on the right side of the die holder on the rack. Under the auxiliary clamping action of the left positioning block and the right positioning block, the damage of fibers in the recombined bamboo is greatly reduced, the crack quantity of bamboo chips is reduced, the toughness and the resistance capability are improved, and the cost is greatly reduced.)

1. A processing method of an original ecological arc-shaped bamboo board comprises the steps of bamboo breaking, gluing, drying, in-mold tiling of a hot press, hot press forming, and further comprises a pressing device and a hot press which are arranged along the feeding direction of bamboo materials, and is characterized by comprising the following steps:

(1) cutting the moso bamboo according to the required specification to obtain bamboo sections, and cutting off bamboo joints protruding on the outer surfaces of the bamboo sections; splitting the bamboo sections into arc bamboo chip blanks;

(2) making the outer circumference of the arc bamboo sheet blank have a diameter of 0.8-1.2 mm; removing interlayer bamboo joints in the inner circle of the arc-shaped bamboo chip blank; the processing into radian is to process into smooth-surfaced light blank with the inner arc radius equal to the outer arc radius;

(3) milling one end or two ends of the light blank into finger-shaped tenons, and performing finger joint assembly;

(4) gluing the green bamboo surface, the yellow bamboo surface and the finger tenon joint surface of the smooth blank, and then sequentially superposing and assembling the smooth blank in the same arc-shaped direction;

(5) sending the glued arc-shaped bamboo chips into the pressing equipment assembly to be pressed, fixed and naturally solidified vertically and laterally at the same time to form recombined bamboo wood;

(6) after gluing the single piece of the recombined bamboo wood, sending the bamboo wood into the hot press to be pressed and solidified vertically and laterally at the same time, and pressing and bonding the bamboo wood to form the arc-shaped bamboo wood.

2. The method of manufacturing the arc-shaped bamboo original state restructuring material according to claim 1, wherein: in the step (1), the moso bamboo is sawn into bamboo sections with the length of 150-; in the step (2), the tabasheer surface of the arc-shaped bamboo chip blank is milled to be 0.5-2mm, the arc is processed into a smooth blank with a smooth surface and the radius of the inner arc is equal to that of the outer arc, and the range of the included angle of the fan-shaped corresponding to the inner arc and the outer arc is 30-120 degrees.

3. The method of manufacturing the arc-shaped bamboo original state restructuring material according to claim 1, wherein: in the step (3), one side edge of each smooth blank is subjected to stretch cutting along the circumferential direction of the bamboo fiber by using a cutting knife, and a convex strip matched with the circular longitudinal strip seam on the adjacent smooth blank is ground on one side of each smooth blank, which is deviated from the circular longitudinal strip seam; in the step (4), arc-shaped bamboo chips are carbonized at high temperature, and are put into a drying and sterilizing carbon dryer, the heating temperature of the drying and sterilizing carbon dryer is 100-200 ℃, the heating time is 2-5 hours, the arc-shaped bamboo chips are carbonized, and the carbonization degree is 2% -35%; hot pressing and re-flattening the carbonized arc bamboo sheet group, and then gluing; the adhesive used for gluing in the step (4) and the step (5) is one of UF, PF and MDI.

4. The method for processing the original ecological arc-shaped bamboo board as claimed in claim 1, wherein the method comprises the following steps: the pressing equipment comprises a movable die, a die holder, a rack, a left positioning block positioned on the left side of the die holder and a right positioning block positioned on the right side of the die holder, wherein the movable die is positioned right above the die holder, the die holder is arranged on the rack, the movable die is movably arranged on the rack towards the die holder, the left positioning block and the right positioning block are movably arranged on the rack in opposite directions, wear-resistant layers for improving wear resistance are arranged on the movable die and the die holder, a first graduated scale for measuring the edge position of the left side of the left positioning block is arranged on the rack, a second graduated scale for measuring the edge position of the right side of the right positioning block is arranged on the rack, and the first graduated scale and the second graduated scale are positioned on the same straight line; the rack is provided with a first sliding mechanism for moving the left positioning block to play a guiding role, the first sliding mechanism is positioned below the left positioning block, the rack is provided with a second sliding mechanism for moving the right positioning block to play a guiding role, and the first sliding mechanism is positioned below the right positioning block.

5. The method for processing the original ecological arc-shaped bamboo board as claimed in claim 4, wherein the method comprises the following steps: the pressing equipment further comprises a first driving device, a second driving device and a third driving device, wherein the first driving device, the second driving device and the third driving device are respectively provided with a power output end, the first driving device is positioned above the die holder, the power output end of the first driving device faces the die holder, the movable die is fixedly connected with the power output end of the first driving device, and the first driving device can drive the movable die to be vertically and movably mounted on the rack; the second driving device is positioned on the left side of the die holder, the power output end of the second driving device faces the right positioning block, the second driving device is fixedly installed on the rack, and the second driving device drives the left positioning block to transversely move on the rack; the third driving device is positioned on the right side of the die holder, the power output end of the third driving device faces the left positioning block, the third driving device is fixedly installed on the rack, and the second driving device drives the right positioning block to transversely move on the rack.

6. The method for processing the original ecological arc-shaped bamboo board as claimed in claim 4, wherein the method comprises the following steps: the rack is provided with a fourth driving device below the die holder, the fourth driving device is below the die holder and is provided with a power output end for driving the die holder to vertically move, and the die holder is fixedly connected with the fourth driving device through the power output end.

7. The method for processing the original ecological arc-shaped bamboo board as claimed in claim 4, wherein the method comprises the following steps: the first sliding mechanism is a first sliding rail and a first sliding block, the first sliding rail is horizontally arranged on the rack, the first sliding rail is fixed with the rack, the right end part of the first sliding rail is positioned outside the area above the die holder, and the first sliding block is fixedly arranged on the left positioning block and is in sliding fit with the first sliding rail; the second sliding mechanism is composed of a second sliding rail and a second sliding block, the second sliding rail is horizontally arranged on the rack, the second sliding rail is fixed with the rack, the left end of the second sliding rail is located outside the area above the die holder, and the second sliding block is fixedly installed on the right positioning block and is in sliding fit with the second sliding rail.

8. The method for processing the original ecological arc-shaped bamboo board as claimed in claim 4, wherein the method comprises the following steps: the first graduated scale and the first slide rail are arranged side by side, and the second graduated scale and the second slide rail are arranged side by side.

9. The method for processing the original ecological arc-shaped bamboo board as claimed in any one of claims 4-8, wherein the method comprises the following steps: the movable mold, the mold base, the left positioning block and the right positioning block are all internally provided with backflow channels for storing heat conduction oil, a plurality of mounting holes communicated with the corresponding backflow channels are formed in the movable mold, the mold base, the left positioning block and the right positioning block, the mounting holes are respectively formed in the front/rear side walls of the movable mold, the mold base, the left positioning block and the right positioning block, and electric heating rods for heating the heat conduction oil are assembled on the mounting holes.

10. The method for processing the original ecological arc-shaped bamboo board as claimed in claim 4 or 6, wherein the method comprises the following steps: the anti-skid rubber pad is characterized in that a first rubber pad is arranged on the left positioning block and is positioned on the side face, opposite to the right positioning block, of the left positioning block, a second rubber pad is arranged on the right positioning block and is positioned on the side face, opposite to the left positioning block, of the right positioning block, and anti-skid structures are arranged on the first rubber pad and the second rubber pad.

Technical Field

The invention relates to the field of artificial boards and interior decoration materials, in particular to a processing method of an original ecological arc-shaped bamboo board.

Background

The existing pressing equipment is used for extruding and recombining a plurality of straight bamboo chips into a single bamboo board, and because the straight bamboo chips are not pre-tightened in the length direction for being used as or clamped, the tenon joints of the plurality of straight bamboo chips are incomplete frequently, the gaps are large, the appearance is not attractive, and the bearing capacity and the resistance of the recombined bamboo are poor. The width direction of the recombined bamboo (namely, the single bamboo boards) is uneven, so that the materials are inconvenient to arrange (namely, the edges of redundant bamboo chips need to be cut off for trimming), the waste of the bamboo chips is caused, and the cost is increased. The treatment process not only has noise and bamboo powder pollution, but also needs to consume labor cost. In addition, the arc bamboo is directly manufactured through direct carbonization treatment, the glue is not applied to the recombined bamboo again, the recombined bamboo is not subjected to hot-pressing heat preservation treatment, the recombined bamboo is easy to crack or break when being pressed into the arc bamboo board, the qualified rate of the arc bamboo board is low, the production requirements of enterprises can not be met, the cost investment of the enterprises is increased, and the development of the enterprises is restricted.

In view of this, the inventor of the present invention has improved the conventional arc bamboo board processing method, and has made the present invention.

Disclosure of Invention

The invention aims to provide a processing method of an original ecological arc bamboo board.

In order to achieve the purpose, the invention adopts the following technical scheme:

a processing method of an original ecological arc-shaped bamboo board comprises the steps of bamboo breaking, gluing, drying, in-mold tiling of a hot press, hot press forming, pressing equipment and a hot press which are arranged along the feeding direction of bamboo materials, and specifically comprises the following steps:

(1) cutting the moso bamboo according to the required specification to obtain bamboo sections, and cutting off bamboo joints protruding on the outer surfaces of the bamboo sections; splitting the bamboo sections into arc bamboo chip blanks;

(2) making the outer circumference of the arc bamboo sheet blank have a diameter of 0.8-1.2 mm; removing interlayer bamboo joints in the inner circle of the arc-shaped bamboo chip blank; the processing into radian is to process into smooth-surfaced light blank with the inner arc radius equal to the outer arc radius;

(3) milling one end or two ends of the light blank into finger-shaped tenons, and performing finger joint assembly;

(4) gluing the green bamboo surface, the yellow bamboo surface and the finger tenon joint surface of the smooth blank, and then sequentially superposing and assembling the smooth blank in the same arc-shaped direction;

(5) sending the glued arc-shaped bamboo chips into the pressing equipment assembly to be pressed, fixed and naturally solidified vertically and laterally at the same time to form recombined bamboo wood;

(6) after gluing the single piece of the recombined bamboo wood, sending the bamboo wood into the hot press to be pressed and solidified vertically and laterally at the same time, and pressing and bonding the bamboo wood to form the arc-shaped bamboo wood.

In the step (1), the moso bamboo is sawn into bamboo sections with the length of 150-; in the step (2), the tabasheer surface of the arc-shaped bamboo chip blank is milled to be 0.5-2mm, the arc is machined into a smooth blank with a smooth surface and the radius of an inner arc is equal to that of an outer arc, and the range of a fan-shaped included angle corresponding to the inner arc and the outer arc is 30-120 degrees;

in the step (3), one side edge of each smooth blank is subjected to stretch cutting along the circumferential direction of the bamboo fiber by using a cutting knife, and a convex strip matched with the circular longitudinal strip seam on the adjacent smooth blank is ground on one side of each smooth blank, which is deviated from the circular longitudinal strip seam; in the step (4), arc-shaped bamboo chips are carbonized at high temperature, and are put into a drying and sterilizing carbon dryer, the heating temperature of the drying and sterilizing carbon dryer is 100-200 ℃, the heating time is 2-5 hours, the arc-shaped bamboo chips are carbonized, and the carbonization degree is 2% -35%; hot pressing and re-flattening the carbonized arc bamboo sheet group, and then gluing; the adhesive used for gluing in the step (4) and the step (5) is one of UF, PF and MDI.

The pressing equipment comprises a movable die, a die holder, a rack, a left positioning block positioned on the left side of the die holder and a right positioning block positioned on the right side of the die holder, wherein the movable die is positioned right above the die holder, the die holder is arranged on the rack, the movable die is movably arranged on the rack towards the die holder, the movable die and the die holder are provided with wear-resistant layers for improving wear resistance, the left positioning block and the right positioning block are movably arranged on the rack in opposite directions, the rack is provided with a first graduated scale for measuring the edge position of the left side of the left positioning block, the rack is provided with a second graduated scale for measuring the edge position of the right side of the right positioning block, and the first graduated scale and the second graduated scale are positioned on the same straight line; the rack is provided with a first sliding mechanism for moving the left positioning block to play a guiding role, the first sliding mechanism is positioned below the left positioning block, the rack is provided with a second sliding mechanism for moving the right positioning block to play a guiding role, and the first sliding mechanism is positioned below the right positioning block.

The pressing equipment further comprises a first driving device, a second driving device and a third driving device, wherein the first driving device, the second driving device and the third driving device are respectively provided with a power output end, the first driving device is positioned above the die holder, the power output end of the first driving device faces the die holder, the movable die is fixedly connected with the power output end of the first driving device, and the first driving device can drive the movable die to be vertically and movably mounted on the rack; the second driving device is positioned on the left side of the die holder, the power output end of the second driving device faces the right positioning block, the second driving device is fixedly installed on the rack, and the second driving device drives the left positioning block to transversely move on the rack; the third driving device is positioned on the right side of the die holder, the power output end of the third driving device faces the left positioning block, the third driving device is fixedly installed on the rack, and the second driving device drives the right positioning block to transversely move on the rack.

The rack is provided with a fourth driving device below the die holder, the fourth driving device is below the die holder and is provided with a power output end for driving the die holder to vertically move, and the die holder is fixedly connected with the fourth driving device through the power output end.

The first sliding mechanism is a first sliding rail and a first sliding block, the first sliding rail is horizontally arranged on the rack, the first sliding rail is fixed with the rack, the right end part of the first sliding rail is positioned outside the area above the die holder, and the first sliding block is fixedly arranged on the left positioning block and is in sliding fit with the first sliding rail; the second sliding mechanism is composed of a second sliding rail and a second sliding block, the second sliding rail is horizontally arranged on the rack, the second sliding rail is fixed with the rack, the left end of the second sliding rail is located outside the area above the die holder, and the second sliding block is fixedly installed on the right positioning block and is in sliding fit with the second sliding rail.

The first graduated scale and the first slide rail are arranged side by side, and the second graduated scale and the second slide rail are arranged side by side.

The movable mold, the mold base, the left positioning block and the right positioning block are all internally provided with backflow channels for storing heat conduction oil, a plurality of mounting holes communicated with the corresponding backflow channels are formed in the movable mold, the mold base, the left positioning block and the right positioning block, the mounting holes are respectively formed in the front/rear side walls of the movable mold, the mold base, the left positioning block and the right positioning block, and electric heating rods for heating the heat conduction oil are assembled on the mounting holes.

The anti-skid rubber pad is characterized in that a first rubber pad is arranged on the left positioning block and is positioned on the side face, opposite to the right positioning block, of the left positioning block, a second rubber pad is arranged on the right positioning block and is positioned on the side face, opposite to the left positioning block, of the right positioning block, and anti-skid structures are arranged on the first rubber pad and the second rubber pad.

The invention has the beneficial effects that:

according to the processing method of the original ecological arc bamboo board, during the processing process, the straight bamboo chips can be obtained and effectively controlled to be the recombined bamboo materials (namely the control of the thickness of the green thin layer of the bamboo, the control of the sawing or cutting length, the control of the temperature, the control of the heating time and the like of the moso bamboo) without processing the edges and the surfaces of the recombined bamboo materials, so that the waste of the obtained straight bamboo chips is saved, the use amount of the straight bamboo chips is reduced, and the cost is further reduced. Meanwhile, in the process of processing the obtained straight bamboo chips into the recombined bamboo wood, the noise and the pollution of the bamboo powder are reduced, and the working environment is improved. Personnel are not needed to participate in the process, the labor cost is reduced, the cost investment of enterprises is reduced, the development of the enterprises is promoted, and the income is increased.

The pressing equipment is mainly characterized in that a left positioning block on the left side of the die holder and a right positioning block on the right side of the die holder are arranged on the rack, and the left positioning block and the right positioning block can move oppositely, so that the pressing equipment can tightly push two side edges of the recombined bamboo wood in the parallel feeding direction in the flattening process and clamp the recombined bamboo wood. Under the clamping auxiliary effect, the extension of the recombined bamboo wood in the process of pressing the recombined bamboo wood into the arc-shaped bamboo wood is effectively controlled, the cracking and the fracture are avoided, and the arc-shaped bamboo wood obtained by pressing is ensured to meet the required requirements.

Drawings

For ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.

FIG. 1 is a process flow chart of the processing method of the original ecological arc bamboo board of the invention.

FIG. 2 is a schematic view of the structure of a pressing apparatus in the present invention.

In the figure:

a moving mold-1; a die holder-2; a frame-3; a left positioning block-4; a right positioning block-5; a first rubber pad-6; a second rubber pad-7; arc bamboo board-010.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.

As shown in fig. 1, the processing method of the original ecological arc-shaped bamboo board comprises the steps of breaking bamboo, gluing, drying, laminating and arranging boards in a hot press die, and hot press forming, and further comprises a pressing device and a hot press which are arranged along the feeding direction of bamboo materials, and specifically comprises the following steps:

(1) cutting the moso bamboo according to the required specification to obtain bamboo sections, and cutting off bamboo joints protruding on the outer surfaces of the bamboo sections; splitting the bamboo sections into arc bamboo chip blanks; specifically, the method comprises the following steps: in the step (1), the moso bamboo is sawn into bamboo sections with the lengths of 200mm, 250mm, 300mm, 450mm, 1000mm, 2000mm or 3000mm, and the bamboo sections are split into arc-shaped bamboo sheet blanks with the widths of 10mm, 20mm, 50mm, 60mm, 70mm, 80mm, 100mm or 120 mm.

(2) The outer circumference of the arc bamboo sheet blank is cut off with a bamboo green thin layer of 0.5-1.2mm, so as to reduce the surface hardness and reduce cracking during stretching and unfolding. Removing interlayer bamboo joints in the inner circle of the arc-shaped bamboo chip blank (namely removing inner bamboo joints and outer bamboo joints); the radian of the processed light blank is that the light blank with smooth surface and the inner arc radius equal to the outer arc radius is processed. According to the difference of the chest diameter of the bamboo, splitting the bamboo into arc bamboo blanks with certain specifications, removing inner and outer bamboo joints through milling, and processing into standard arc bamboo sheet blanks with consistent specifications and smooth surfaces, wherein the thicknesses of the standard arc bamboo sheet blanks are as follows: the bamboo has natural wall thickness. Specifically, the method comprises the following steps: the outer arc radius R1 of arc bamboo chip blank is greater than inner arc radius R2 under the natural state, through milling process, process inner arc radius R1 into R interior, process outer arc radius into R outer, make new inner arc radius equal with outer arc radius, namely R interior become R outer, cut the section position, form the light blank of standard arc. In the step (2), the tabasheer surface of the arc-shaped bamboo chip blank is milled to be 0.8mm, 1mm, 1.5mm or 2mm, the arc is processed into a smooth blank with a smooth surface and the radius of the inner arc is equal to that of the outer arc, and the range of the included angle of the sectors corresponding to the inner arc and the outer arc is 30-120 degrees.

(3) And milling one end or two ends of the light blank into finger-shaped tenons, and performing finger joint assembly. Specifically, the method comprises the following steps: in the step (3), one side edge of each smooth blank is subjected to drawing cutting along the circumferential direction of the bamboo fiber by using a cutting knife, and a convex strip matched with the circular longitudinal strip seam on the adjacent smooth blank is ground on one side of each smooth blank, which is deviated from the circular longitudinal strip seam. The cutting knife is arranged on a conical iron bar, a plurality of cutting knives are arranged, when the bamboo tube is fed into the conical iron bar, the surface of the tabasheer is cut into tabasheer meat by about 1-2 mm from the surface of the tabasheer under the cutting of the plurality of cutting knives, and the purpose is to destroy the hardness of the tabasheer surface, so that the circular bamboo tube does not crack seriously due to the hardness of the tabasheer when being stretched and unfolded.

(4) Gluing the green bamboo surface, the yellow bamboo surface and the finger tenon joint surface of the smooth blank, and then sequentially superposing and assembling the smooth blank in the same arc-shaped direction; specifically, the method comprises the following steps: in the step (4), the arc-shaped bamboo chips are carbonized at high temperature, and the round bamboo tube is carbonized at high temperature to soften the bamboo tube and prevent worm damage; the high-temperature carbonization treatment is to put the moso bamboo tube into a high-temperature sterilization pot for high-temperature treatment, so that the moso bamboo tube is softened, and is easy to flatten and convenient to process. Putting the arc bamboo chips into a drying and sterilizing carbon dryer, heating the drying and sterilizing carbon dryer at 150 ℃, 180 ℃ or 200 ℃ for 2.5-5 hours, and carbonizing the arc bamboo chips to the extent of 2%, 10%, 20%, 25% or 35%; the carbonized arc bamboo sheet group is hot pressed by pressing equipment, is flattened and is spread, and then is glued (namely adhesive is coated) by a conventional mode.

(5) Assembling the glued arc-shaped bamboo chips by pressing equipment, and pressing, fixing and naturally curing the glued arc-shaped bamboo chips vertically and laterally by the pressing equipment in the process of assembling the blanks (namely pressing and curing the pressing equipment in a cold pressing mode or a hot pressing mode) to form recombined bamboo; and (3) shaping the stretched moso bamboo into a blank bamboo board by adopting the hot pressing and heavy pressing modes of the pressing equipment.

(6) The surface of a plurality of layers of bamboo materials is processed and leveled and then stacked in the same direction, pressing equipment is adopted to pressurize the plurality of layers of bamboo materials, and bamboo squares or square materials with different thicknesses are formed through gluing and bonding. Specifically, the processed bamboo boards need to be glued by more than two layers, and can be longitudinally glued by the bamboo boards, and can also be longitudinally and transversely glued or longitudinally and transversely glued. The glued bamboo board is made by gluing the inner layer, the processed bamboo square or square material has no glue on the surface, and the bamboo chopping board is suitable for furniture manufacture, building decoration, various artworks and the like, in particular to a bamboo chopping board, and the produced bamboo chopping board is beautiful and elegant, is environment-friendly and sanitary, and is durable.

In steps (3) to (5), the adhesive used is UF, PF, MDI or other adhesives commonly used in the art. Gluing the green bamboo surface, the tabasheer surface and the finger tenon joint surface of the smooth blank with the finger tenon, and then sequentially superposing and assembling the blank. The seams of different finger-joint light blanks can be arranged in a staggered way when assembling; thermosetting resins such as phenolic resin, melamine resin and urea resin or other adhesives for producing artificial boards can be adopted.

Hot-pressing or cold-pressing molding: and (3) pressing and fixing the glued arc-shaped bamboo sheet assembly vertically and laterally at the same time for natural solidification (a cold pressing method), or sending the assembly into a hot press for vertical and lateral simultaneous pressing and rapid solidification (a hot pressing method), so as to form the recombined bamboo wood.

1) Cold pressing process parameters

Working temperature: room temperature; vertical unit pressure: 2.0-2.5 Mpa; lateral unit pressure: 0.2-4.5 Mpa; processing equipment (namely pressing equipment) adopted in cold pressing is adopted, and the vertical pressing is larger than the lateral pressing when the processing equipment works; pressurizing time: 12-36 h; the implementation mode is as follows: and (5) fixing the clamp.

2) Hot pressing process parameters

Working temperature: 100-300 ℃; vertical unit pressure: 0.2-2.5 Mpa; lateral unit pressure: 0.2-4.5 Mpa; processing equipment (namely pressing equipment) is adopted for hot pressing, and the vertical pressing is larger than the lateral pressing when the processing equipment works; pressurizing time: 2-4 min; the implementation mode is as follows: for the plate, a plane hot press or a special high-frequency hot press used in a solid wood floor production line is adopted; for longer (more than 3000 mm) square recombined materials, a continuous high-frequency hot press is adopted, so that internal heating and rapid solidification are facilitated.

Preferably, two hot pressing processes are adopted for processing the arc-shaped bamboo chip blank to the arc-shaped bamboo board, and the parameters of the two hot pressing processes are the same (namely the parameters of the hot pressing processes are adopted). As a common option, the arc-shaped bamboo chip blanks are processed into the arc-shaped bamboo boards by adopting a one-time hot pressing process and a one-time cold pressing process (namely the arc-shaped bamboo chips are cold pressed in the process of recombining the bamboo board blanks), and the hot pressing process parameters and the cold pressing process parameters are adopted.

The processing method of the original ecological arc bamboo board of the invention is to maintain the original shape of the bamboo material to the maximum extent and improve the utilization rate. The natural bamboo material is tubular, the inner wall and the outer wall of the bamboo tube can be regarded as 2 concentric rings (note: the actually naturally formed bamboo tube is not all standard circular, most of the bamboo tubes are approximate to circular), therefore, the radiuses of the inner arc and the outer arc of the bamboo blank are unequal, in order to realize the continuous matching and stacking of a plurality of bamboo chips, the bamboo blank is processed into the inner arc and the outer arc, the edge of one side of each light blank is circumferentially drawn and cut along the bamboo fiber direction by using a cutting knife, the side of each light blank, which is deviated from the circular longitudinal strip seam, is ground into a convex strip matched with the circular longitudinal strip seam on the adjacent light blank, the length direction of the two outermost light blanks is abutted by the processing equipment, the two adjacent light blanks are ensured to be automatically spliced with each other, and the stable bamboo square structure is formed. Meanwhile, the cracking rate of the arc-shaped bamboo chip blank changed into the arc-shaped bamboo board 010 is reduced, and the fiber damage is reduced, which is one of the keys of the invention.

The invention has the advantages that: aiming at the characteristics of hollow and conical bamboo, large difference of physical and mechanical properties of bamboo green, bamboo yellow and bamboo joints and the like, the invention processes the round hollow bamboo into the arc-shaped bamboo blank, maintains the natural structure of the bamboo, and carries out original state bamboo blank recombination to develop the high-strength recombined bamboo material. The original state recombined material of the arc bamboo can replace precious wood and various artificial boards. The utilization rate of bamboo wood resources is improved, and forest resources are saved. The problems of low bamboo utilization rate, poor appearance quality, complex processing procedures and the like in the prior art are solved well. The invention adopts the inner layer to glue, the processed bamboo square or bamboo board has no glue on the surface, and is particularly suitable for furniture manufacture, building decoration, various artware and bamboo chopping board, and the produced bamboo board is beautiful and elegant, environment-friendly, sanitary and durable.

As shown in fig. 2, in the present invention, the pressing apparatus includes a movable mold 1, a mold base 2, and a frame 3, the movable mold 1 is located right above the mold base 2, the mold base 2 is mounted on the frame 3, and the movable mold 1 is mounted on the frame 3 so as to be movable toward the mold base 2. The movable mould and the mould base are provided with wear-resistant layers for improving wear resistance, the wear-resistant layers are compact oxide films formed on the movable mould 1 and the mould base 2 through heat treatment, and the oxide films are mainly used for increasing friction performance, reducing wear and prolonging service life when the recombined bamboo chips are bent into the arc-shaped bamboo boards. The machining equipment further comprises a left positioning block 4 positioned on the left side of the die holder 2 and a right positioning block 5 positioned on the right side of the die holder 2, wherein the left positioning block 4 and the right positioning block 5 are arranged on the rack 3 in a manner of being capable of moving in opposite directions or moving back to back. Specifically, the moving positioning and the limiting of the movable die 1 and the die holder 2 are the same as those of the existing pressing equipment, and the moving positioning and the limiting of the left positioning block 4 and the right positioning block 5 can be performed in the same manner as those of the movable die 1 and the die holder 2, or can be performed directly in a conventional manner in the field. By adopting the structure, the left positioning block 4 and the right positioning block 5 can move in opposite directions and move away from each other, when the left positioning block 4 and the right positioning block 5 move in opposite directions, the left positioning block 4 and the right positioning block 5 are vertically extruded (namely the movable die 1 and the die holder 2 are vertical to the arc-shaped bamboo plate 010) to the arc-shaped bamboo plate 010, and the clamping force generated to the arc-shaped bamboo plate 010 in the horizontal direction (namely the feeding direction of the pressing equipment to the arc-shaped bamboo plate 010) is tightly pushed on two sides. Under the auxiliary action of clamping, the extension of the recombined bamboo boards towards the width direction of the recombined bamboo boards 010 in the process of pressing the recombined bamboo boards into the arc-shaped bamboo boards 010 (namely the extension of the recombined bamboo boards along the direction perpendicular to the feeding direction of the pressing equipment) is effectively controlled, and the pressed arc-shaped bamboo boards 010 meet the required requirements. In addition, under the clamping auxiliary effect of the opposite movement of the left positioning block 4 and the right positioning block 5, the fiber damage of the recombined bamboo chips is greatly reduced, the crack amount of the bamboo chips is reduced, and the toughness and the resistance capability of the arc-shaped bamboo board 010 are improved. The arc-shaped bamboo board 010 formed by pressing has attractive appearance, the glue consumption is reduced, and the cost is greatly reduced. In addition, under the action of the left positioning block 4 and the right positioning block 5, the arc-shaped bamboo board 010 is more flat in the width direction, materials are convenient to arrange, the cutting amount of bamboo chips is reduced (namely, the trimming amount of edges on two sides in the width direction of the flattened bamboo chips is reduced, the bamboo material waste is reduced), the cost is reduced, and the economic benefit is improved.

In the invention, the pressing equipment further comprises a first driving device, a second driving device and a third driving device, wherein the first driving device is provided with a power output end, the first driving device is positioned above the die holder 2, the power output end of the first driving device faces the die holder 2, the movable die 1 is fixedly connected with the power output end of the first driving device, and the first driving device can drive the movable die 1 to be vertically movably installed on the rack 3; the second driving device is positioned at the left side of the die holder 2, the power output end of the second driving device faces the right positioning block 5, the second driving device is fixedly installed on the rack 3, and the second driving device drives the left positioning block 4 to transversely move on the rack 3; the third driving device is positioned at the right side of the die holder 2, a power output end of the third driving device faces the left positioning block 4, the third driving device is fixedly installed on the rack 3, and the second driving device drives the right positioning block 5 to transversely move on the rack 3.

Preferably, the rack 3 is provided with a fourth driving device located below the die holder 2, the fourth driving device is located below the die holder 2, the fourth driving device has a power output end for driving the die holder 2 to vertically move, and the die holder 2 and the fourth driving device have a power output end fixedly connected. By adopting the structure, the extrusion stroke is conveniently enlarged, a plurality of arc-shaped bamboo boards 010 are conveniently stacked and extruded at the same time, the bamboo-square-shaped or bamboo-wood-square-shaped extrusion die is suitable for processing and application of bamboo squares or bamboo wood, the application range of the bamboo-square-shaped or bamboo-wood-square-shaped extrusion die is widened, one machine has multiple purposes, the economic benefit is high, and the investment cost of purchasing enterprises is reduced.

In the above, the first driving device, the second driving device, the third driving device and the fourth driving device may be any driving devices that are conventional in the art. For example, a conventional stepper motor, a combination of a lead screw and a lead screw nut, or a combination of a conventional oil cylinder and a photoelectric sensor, etc. may be used.

In this embodiment, the frame 3 is provided with a first sliding mechanism for guiding the movement of the left positioning block 4, the first sliding mechanism is located below the left positioning block 4, the frame 3 is provided with a second sliding mechanism for guiding the movement of the right positioning block 5, and the first sliding mechanism is located below the right positioning block 5. Adopt above-mentioned structure setting, the first slide mechanism of setting, the left locating piece 4 removal direction of being convenient for removes smoothly and laborsavingly, reduces the friction between left locating piece 4 removal and the frame 3 simultaneously, reduces energy loss, and noise pollution reduces, provides healthy operational environment. The second sliding mechanism is convenient for the right positioning block 5 to move and guide, the movement is smooth and labor-saving, meanwhile, the friction force between the right positioning block 5 and the rack 3 is reduced, the energy loss is reduced, the noise pollution is reduced, and a healthy working environment is provided.

Preferably, the first sliding mechanism is a first sliding rail (not shown in the figure) and a first sliding block (not shown in the figure), the first sliding rail is horizontally arranged on the frame 3, the first sliding rail is fastened or welded on the frame 3 through bolts, and the right end of the first sliding rail is located outside the area above the die holder 2, so that the occupation of the space above the die holder 2 can be avoided, and the utilization of the extrusion space is maximized. It should be clarified here that, although the left end of the second slide rail is located outside the area above the die holder 2, the right positioning block 5 can be moved into the space above the die holder 2, so that the convenient use of the arc-shaped bamboo boards 010 with different sizes can be applicable. The first sliding block is fastened or welded on the left positioning block 4 through a bolt, and the first sliding block is in sliding fit with the first sliding rail; the second sliding mechanism is a second sliding rail (not shown in the figure) and a second sliding block (not shown in the figure), the second sliding rail is horizontally arranged on the rack 3, the second sliding rail is fastened or welded on the rack 3 through bolts, and the left end part of the second sliding rail is positioned outside the area above the die holder 2, so that the occupation of the space above the die holder 2 can be avoided, and the utilization of the extrusion space is maximized. It should be clarified here that, although the left end of the second slide rail is located outside the area above the die holder 2, the right positioning block 5 can be moved into the space above the die holder 2, so that the convenient use of the arc-shaped bamboo boards 010 with different sizes can be applicable. The second sliding block is fastened or welded on the right positioning block 5 through a bolt, and the second sliding block is in sliding fit with the second sliding rail.

It should be noted that the first slide rail and the second slide rail may be in the same straight line. And at least one (namely the first slide rail and the second slide rail can be two) of first slide rail and second slide rail, for according to actual need, install corresponding first slider at first slide rail, install corresponding second slider at the second slide rail. The cooperation between the first slide rail and the first slide block is not further limited to the function of the first slide mechanism, but is preferred. The first sliding mechanism may also take on other conventional configurations in the art. Similarly, the cooperation between the second slide rail and the second slide block is not further limited to the second slide mechanism, but is merely preferable. The second sliding mechanism may also take other conventional configurations in the art.

Preferably, a lifting device which can control the vertical lifting of the left positioning block 4 and the right positioning block 5 simultaneously is installed on the frame 3 in a conventional manner in the field according to actual needs. A first lifting device for controlling the vertical lifting of the left positioning block 4 can be mounted on the first sliding mechanism (i.e. a first lifting device for vertical lifting is mounted on the first slide block), and a second lifting device for controlling the vertical lifting of the right positioning block 5 can be mounted on the second sliding mechanism (i.e. a second lifting device for vertical lifting is mounted on the second slide block) in a conventional manner in the art. Therefore, as the movable die 1 and the die holder 2 are lifted, the left positioning block 4 and the right positioning block 5 can be always flush with each other and are respectively positioned on two sides of the arc-shaped bamboo board 010 in the width direction, and the arc-shaped bamboo board 010 is assisted to be clamped. In addition, can set up the first detachable construction (promptly first detachable construction can be tenon and tongue-and-groove) that conveniently dismantle left locating piece 4 at first slider, be convenient for like this as required or left locating piece 4 use direct quick replacement when wearing and tearing, reduce the maintenance cost. In the same way, a second detachable structure (namely, the second detachable structure can be a tenon and a mortise which are the same as the first detachable structure) which is convenient for detaching the right positioning block 5 can be arranged on the second sliding block, so that the right positioning block 5 can be directly and quickly replaced when being worn as required, and the maintenance cost is reduced.

Further preferably, a first graduated scale (not shown) is arranged on the frame 3, and the position of the left edge of the left positioning block 4 is visually measured through the first graduated scale, so that direct observation and measurement are facilitated, and time is saved. Meanwhile, the movement amount of the left positioning block 4 is convenient to count, and machine debugging is carried out according to the difference of the widths of the arc-shaped bamboo boards 010. The first graduated scale and the first slide rail are arranged side by side, a second graduated scale (not shown in the figure) is arranged on the rack 3, and the edge position of the right side of the right positioning block 5 is visually measured through the first graduated scale, so that the direct observation and the measurement are convenient, and the time is saved. Meanwhile, the movement amount of the right positioning block 5 is convenient to count, and machine debugging is carried out according to the difference of the widths of the arc-shaped bamboo boards 010. The second graduated scale and the second slide rail are arranged side by side; the first graduated scale and the second graduated scale are positioned on the same straight line. The first graduated scale and the second graduated scale can also be directly and equivalently replaced by the graduated scales with zero middle graduation and increasing numerical values along two sides.

In this embodiment, return channels (not shown in the figure) for storing heat conducting oil are disposed in the movable mold 1, the mold base 2, the left positioning block 4, and the right positioning block 5, where the return channels are disposed on the movable mold 1, the mold base 2, the left positioning block 4, and the right positioning block 5 in a conventional manner in the art. The movable die 1, the die holder 2, the left positioning block 4 and the right positioning block 5 are all provided with a plurality of mounting holes communicated with the corresponding backflow channels, wherein the backflow channels are formed in a conventional mode in the field, and the mounting holes are provided with internal threads (namely internal thread holes). The mounting holes are respectively positioned on the front/rear side walls of the movable die 1, the die holder 2, the left positioning block 4 and the right positioning block 5, the electric heating rods are assembled on the mounting holes, and the electric heating rods are tightly matched and sealed with the contact parts of the mounting holes. The heat conducting oil is heated by an electric heating rod. The electric heating rod is directly selected from the prior art.

In this embodiment, a first rubber pad 6 is installed on the left positioning block 4, the first rubber pad 6 is located on the side surface of the left positioning block 4 opposite to the right positioning block 5, a second rubber pad 7 is installed on the right positioning block 5, the second rubber pad 7 is located on the side surface of the right positioning block 5 opposite to the left positioning block 4, and specifically, the first rubber pad 6 and the second rubber pad both adopt the existing silica gel pad or rubber pad. First rubber pad 6 and second rubber pad thickness set up according to actual need. Preferably, the first rubber pad 6 and the second rubber pad 7 have the same size corresponding to the left area of the left positioning block 4 and the right area of the right positioning block 5. And the first rubber pad and the second rubber pad are both provided with anti-skidding structures. This anti-skidding structure can be a plurality of vertical side by side recesses, and this recess supplies the arc edge embedding of arc bamboo clapper 010 to fix a position. The anti-slip structure can also be an anti-slip pattern which is integrally formed with the rubber pad. Adopt above-mentioned structure setting, set up first rubber pad 6 and second rubber pad 7, avoid leaning on too rigidity with arc bamboo clapper 010 contact top, simple structure, buffering are effectual and stable. Meanwhile, noise pollution is effectively avoided, and the method is more beneficial to environmental protection.

The working process of the pressing equipment provided by the invention is as follows:

when the extrusion die works, the movable die 1 moves towards the die holder 2 (namely, the movable die 1 is provided with a concave cavity, and the die holder 2 is provided with a die core), and the recombined bamboo boards (namely, single bamboo boards) between the movable die 1 and the die holder 2 are extruded in the vertical direction. Meanwhile, the left positioning block 4 moves towards the right positioning block 5 to abut against the recombined bamboo boards in the left-right direction. Along with movable mould 1 extrudees to the reorganization bamboo clapper, the reorganization bamboo clapper is crooked to extend, because left locating piece 4 leans on with right locating piece 5 top this moment, hinders reorganization bamboo clapper speed of flattening out gradually, forms the buffering for the reorganization bamboo clapper receives the top in the reorganization bamboo clapper left and right sides direction in the bending and sizing process (under left locating piece 4 and right locating piece 5 relative motion clamp assist effect promptly), and whole more closely knit obtains more closely knit arc bamboo clapper than obtaining from current pressing equipment. Therefore, the fiber damage of the bamboo chips is greatly reduced, the crack amount of the bamboo chips is reduced, and the toughness and the resistance capability of the arc-shaped bamboo board are improved. The arc-shaped bamboo board formed by pressing has beautiful appearance, reduces the using amount of glue and greatly reduces the cost. Therefore, the arc-shaped bamboo board obtained by the invention meets the requirements better and has higher economic benefit. In addition, the left edge and the right edge of the obtained arc-shaped bamboo board are smoother, the material arrangement is convenient, the cutting amount of bamboo chips is reduced (namely, the trimming amount of the edges of the left side and the right side of the arc-shaped bamboo board is reduced, the bamboo material waste is reduced), the cost is reduced, and the economic benefit is improved.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.