Arc-shaped bamboo sheet flattening method

Abstract

The present application relates to a kind of arc bamboo sheet flattening method, including drying box, vertical pivot, first flattening cavity, second flattening cavity, third flattening cavity and pressure maintaining cavity are equipped in drying box interior, there are four bamboo sheet placing grooves of circumferential distribution on vertical pivot, four bamboo sheet placing grooves are rotated to first flattening cavity, second flattening cavity, third flattening cavity and pressure maintaining cavity in turn by vertical pivot;Arc bamboo in bamboo sheet placing groove is flattened in first flattening cavity, second flattening cavity, third flattening cavity in turn and flattened, finally, after flattening in pressure maintaining cavity, pressure maintaining is carried out, the whole process forms flow line operation, not only effectively improve overall processing efficiency, and since bamboo sheet drying, flattening, can effectively improve the flattening effect of bamboo sheet.

Description

Technical fields:

[0001] This invention relates to a method for flattening arc-shaped bamboo strips. Background technology:

[0002] Bamboo and wood products are mainly made of high-quality bamboo strips. They not only have the advantages of being resistant to deformation and bacterial growth, high strength, uniform distribution of bamboo fibers on the surface, and corrosion resistance, but also have the properties of absorbing moisture and heat, absorbing ultraviolet rays and harmful gases, and having no glue on the surface, which is in line with the concept of low-carbon and environmentally friendly living.

[0003] Bamboo flattening is a key process in bamboo product manufacturing. Bamboo is softened at high temperatures and then flattened into strips using a flattening device. However, existing bamboo strip flattening devices apply pressure in a single, continuous process, resulting in numerous and deep cracks in the processed bamboo strips and poor overall quality. Furthermore, existing bamboo strip flattening devices are mostly single-line processes, forming only one bamboo strip at a time before moving on to the next, failing to create a streamlined production line and leading to low overall processing efficiency. Therefore, it is necessary to improve this technology, hence this project. Summary of the Invention:

[0004] The present invention addresses the problems existing in the prior art by providing a method for flattening curved bamboo strips, which is reasonably designed and effectively improves the forming quality and processing efficiency.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: an arc-shaped bamboo strip flattening method, including a drying box and a vertical rotating shaft vertically disposed inside the drying box. The drying box is provided with a first flattening cavity, a second flattening cavity, a third flattening cavity, and a pressure holding cavity evenly distributed around the vertical rotating shaft. Four bamboo strip placement slots are fixed on the outer peripheral wall of the vertical rotating shaft. The bamboo strip placement slots extend radially along the vertical rotating shaft. The vertical rotating shaft drives the four bamboo strip placement slots to rotate sequentially into the first flattening cavity, the second flattening cavity, the third flattening cavity, and the pressure holding cavity. The flattening process includes the following steps: (1) placing a bamboo strip in each bamboo strip placement slot. The vertical rotating shaft drives the four bamboo strip placement slots to rotate sequentially into the first flattening cavity, the second flattening cavity, the third flattening cavity, and the pressure holding cavity. (2) when the bamboo strip rotates with the bamboo strip placement slot into the first flattening cavity, the heating component in the first flattening cavity dries the bamboo strip once. At the same time, the first flattening cavity... (3) After being flattened and dried once, the bamboo strips rotate to the second flattening cavity along the bamboo strip placement groove. The heating component in the second flattening cavity dries the bamboo strips a second time. At the same time, the second flattening roller in the second flattening cavity moves along the bamboo strip placement groove and flattens the bamboo strips a second time. (4) After being flattened and dried twice, the bamboo strips rotate to the third flattening cavity along the bamboo strip placement groove. The heating component in the third flattening cavity dries the bamboo strips a third time. At the same time, the third flattening roller in the third flattening cavity moves along the bamboo strip placement groove and flattens the bamboo strips a third time. (5) After being flattened and dried three times, the bamboo strips rotate to the pressure holding cavity along the bamboo strip placement groove. The pressure holding plate in the pressure holding cavity moves downward and presses down on the bamboo strips. The heating component in the pressure holding cavity dries the bamboo strips, thus achieving pressure holding for the bamboo strips after being flattened and dried three times.

[0006] Furthermore, in steps (2)-(4), the heating temperature of the heating components is different.

[0007] Furthermore, heating components are provided inside the first flattening cavity, the second flattening cavity, the third flattening cavity, and the pressure holding cavity; the first flattening cavity, the second flattening cavity, and the third flattening cavity are respectively provided with a first flattening pressure roller, a second flattening pressure roller, and a third flattening pressure roller that can move along the bamboo strip placement groove, and the heights of the first flattening pressure roller, the second flattening pressure roller, and the third flattening pressure roller decrease sequentially; the pressure holding cavity is provided with a liftable pressure holding plate, which is used to cooperate with the bamboo strip placement groove to press the bamboo strips.

[0008] Furthermore, the first flattening cavity, the second flattening cavity, the third flattening cavity, and the pressure holding cavity all include an upper top plate and a lower bottom plate distributed on the upper and lower sides of the bamboo strip placement groove. The ends of the upper top plate and the lower bottom plate away from the vertical rotating shaft are fixedly connected to the inner wall of the drying chamber. Rotating sleeves are fixed between the upper top plates of the first flattening cavity, the second flattening cavity, the third flattening cavity, and the pressure holding cavity, and between the lower bottom plates of the first flattening cavity, the second flattening cavity, the third flattening cavity, and the pressure holding cavity. The rotating sleeves are sleeved on the outside of the vertical rotating shaft, and the rotating sleeves can rotate relative to the vertical rotating shaft.

[0009] Furthermore, the heating assembly includes a pair of vertically distributed electric heating plates, which are respectively installed on the bottom surface of the upper top plate and the top surface of the lower bottom plate, and the electric heating plates are electrically connected to a temperature controller.

[0010] Furthermore, the first flattening roller, the second flattening roller, and the third flattening roller are all driven by a flattening drive mechanism to move along the inside of the bamboo strip placement groove. The flattening drive mechanism includes a ball screw and nut pair arranged radially along the vertical axis of rotation. A flattening roller fixing frame is fixedly arranged at the bottom of the moving end of the ball screw and nut pair, and the flattening roller fixing frame is located above the bamboo strip placement groove.

[0011] Furthermore, the pressure plate extends radially along the vertical axis of rotation, and the pressure plate is driven to move vertically up and down by a lifting cylinder vertically positioned above it. The lifting cylinder is connected to the top of the pressure chamber via a connecting frame.

[0012] Furthermore, the inner wall of the drying chamber is provided with an annular sliding groove, which corresponds to the position of the four bamboo strip placement slots. The end of the bamboo strip placement slot away from the vertical axis extends into the annular sliding groove and slides in cooperation with the annular sliding groove.

[0013] Furthermore, a sliding roller is installed at the bottom of one end of the bamboo strip placement groove that extends into the annular groove, and the sliding roller rolls along the annular groove.

[0014] Compared with the prior art, the present invention has the following advantages: The present invention is reasonably designed. The arc-shaped bamboo strips in the bamboo strip placement groove are dried and flattened three times in the first flattening cavity, the second flattening cavity, and the third flattening cavity. Finally, they are flattened and pressure-held in the pressure holding cavity. The whole process forms an assembly line operation, which not only effectively improves the overall processing efficiency, but also effectively improves the flattening effect of the bamboo strips due to the multiple drying and flattening of the bamboo strips. Attached image description:

[0015] Figure 1 This is a schematic diagram of the front cross-sectional structure of an embodiment of the present invention;

[0016] Figure 2 yes Figure 1 Schematic diagram of the AA cross-section structure;

[0017] Figure 3 yes Figure 1 Enlarged diagram of point B in the diagram;

[0018] Figure 4 yes Figure 1 A schematic diagram of the CC cross-section structure. Detailed implementation method:

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0021] like Figures 1-4As shown, the present invention discloses a method for flattening arc-shaped bamboo strips, comprising a drying chamber 1 and a vertical rotating shaft 2 vertically disposed inside the drying chamber 1. The vertical rotating shaft 2 is driven to rotate by a drive motor 3 installed at the top of the drying chamber 1. The drying chamber 1 has a first flattening cavity 4, a second flattening cavity 5, a third flattening cavity 6, and a pressure holding cavity 7, which are evenly distributed circumferentially around the vertical rotating shaft and located on the same horizontal plane. Four bamboo strip placement slots 8 are fixed to the outer peripheral wall of the vertical rotating shaft 2. The bamboo strip placement slots 8 rotate vertically. The shaft 2 extends radially and is elongated. The bamboo strip placement groove 8 is used to place the elongated bamboo strip 22. The vertical rotating shaft 2 drives the four bamboo strip placement grooves 8 to rotate sequentially into the first flattening cavity 4, the second flattening cavity 5, the third flattening cavity 6, and the pressure holding cavity 7. The flattening process includes the following steps: (1) placing a bamboo strip in each bamboo strip placement groove, and the vertical rotating shaft drives the four bamboo strip placement grooves to rotate sequentially into the first flattening cavity 4, the second flattening cavity 5, the third flattening cavity 6, and the pressure holding cavity 7; (2) when the bamboo strip rotates with the bamboo strip placement groove to the first flattening cavity 4, the second flattening cavity 5, the third flattening cavity 6, and the pressure holding cavity 7, the bamboo strip is placed in the first flattening cavity 4, the second flattening cavity 5, the third flattening cavity 6, and the pressure holding cavity 7. During the first flattening process, the heating element in the first flattening cavity dries the bamboo strips once, and at the same time, the first flattening pressure roller in the first flattening cavity moves along the bamboo strip placement groove, and the first flattening pressure roller flattens the bamboo strips once; (3) After the first flattening and drying, the bamboo strips rotate along the bamboo strip placement groove to the second flattening cavity, where the heating element in the second flattening cavity dries the bamboo strips a second time, and at the same time, the second flattening pressure roller in the second flattening cavity moves along the bamboo strip placement groove, and the second flattening pressure roller flattens the bamboo strips a second time; (4) After the second flattening... After being flattened and dried, the bamboo strips rotate with the bamboo strip placement groove to the third flattening cavity. The heating component in the third flattening cavity dries the bamboo strips three times. At the same time, the third flattening pressure roller in the third flattening cavity moves along the bamboo strip placement groove and flattens the bamboo strips three times. (5) After being flattened and dried three times, the bamboo strips rotate with the bamboo strip placement groove to the pressure holding cavity. The pressure holding plate in the pressure holding cavity moves downward and presses down on the bamboo strips. The heating component in the pressure holding cavity dries the bamboo strips, thus achieving pressure holding of the bamboo strips after being flattened and dried three times.

[0022] In this embodiment, the heating temperature of the heating components is different in steps (2)-(4).

[0023] In this embodiment, heating components are provided inside the first flattening cavity 4, the second flattening cavity 5, the third flattening cavity 6, and the pressure holding cavity 7. The first flattening cavity 4, the second flattening cavity 5, and the third flattening cavity 6 are respectively equipped with a first flattening pressure roller 9, a second flattening pressure roller 10, and a third flattening pressure roller 11 that can move along the bamboo strip placement groove 8. The heights of the first flattening pressure roller 9, the second flattening pressure roller 10, and the third flattening pressure roller 11 decrease sequentially to allow for one, two, and three flattening operations on the bamboo strip. The decreasing heights of the three flattening pressure rollers accommodate the shape changes of the bamboo strip after each flattening operation. The pressure holding cavity 7 is equipped with a liftable pressure holding plate 12, which cooperates with the bamboo strip placement groove 8 to press the bamboo strip, providing final pressure holding after the three flattening operations and improving the flattening effect.

[0024] In this embodiment, the first flattening cavity 4, the second flattening cavity 5, the third flattening cavity 6, and the pressure holding cavity 7 each include an upper top plate 13 and a lower bottom plate 14 distributed on the upper and lower sides of the bamboo strip placement groove 8. The ends of the upper top plate 13 and the lower bottom plate 14 away from the vertical rotating shaft 2 are fixedly connected to the inner wall of the drying chamber 1. That is, both sides of the first flattening cavity, the second flattening cavity, the third flattening cavity, and the pressure holding cavity are open to facilitate the passage of the bamboo strip placement groove when it rotates. Rotating sleeves 15 are fixed between the upper top plates 13 of the first flattening cavity 4, the second flattening cavity 5, the third flattening cavity 6, and the pressure holding cavity 7, and between the lower bottom plates 14 of the first flattening cavity 4, the second flattening cavity 5, the third flattening cavity 6, and the pressure holding cavity 7. The rotating sleeves 15 are sleeved on the outside of the vertical rotating shaft 2, and the rotating sleeves 15 and the vertical rotating shaft 2 can rotate relative to each other.

[0025] In this embodiment, the heating components in the first flattening cavity 4, the second flattening cavity 5, the third flattening cavity 6, and the pressure holding cavity 7 each include a pair of vertically distributed electric heating plates 16. The pair of electric heating plates 16 are respectively installed on the bottom surface of the upper top plate 13 and the top surface of the lower bottom plate 14. The electric heating plates 16 are electrically connected to a temperature controller, and the heating temperature of the heating plates is adjusted by the temperature controller in order to control the drying temperature. The heating components in the first flattening cavity, the second flattening cavity, the third flattening cavity, and the pressure holding cavity each work independently in order to adjust the drying temperature as needed.

[0026] In this embodiment, the first flattening roller 9, the second flattening roller 10, and the third flattening roller 11 are all driven by a flattening drive mechanism to move along the inside of the bamboo strip placement groove 8 (i.e., along the radial direction of the vertical axis). The flattening drive mechanism includes a ball screw nut pair 17 arranged along the radial direction of the vertical axis 2. A flattening roller fixing frame 18 is fixedly installed at the bottom of the moving end of the ball screw nut pair 17, and the flattening roller fixing frame 18 is located above the bamboo strip placement groove 8. The first flattening roller, the second flattening roller, and the third flattening roller are all installed at the lower end of the flattening roller fixing frame. During operation, the ball screw nut pair drives the flattening roller fixing frame to move, and the flattening roller fixing frame drives the flattening roller at its lower end to move synchronously. By controlling the forward and reverse rotation of the ball screw nut pair, the reciprocating movement of the flattening roller can be realized.

[0027] In this embodiment, the pressure plate 12 extends radially along the vertical rotating shaft 2. The pressure plate 12 is driven to move vertically up and down by a lifting cylinder 19 vertically positioned above it. The lifting cylinder 19 is connected to the top of the pressure chamber 7 via a connecting frame 23. When one of the bamboo strip placement slots 8 rotates into the pressure chamber 7 and is located directly below the pressure plate 12, the lifting cylinder 19 drives the pressure plate 12 to move downward and extend into the bamboo strip placement slot 8. The pressure plate 12 presses down on the bamboo strips in the bamboo strip placement slot 8 and maintains pressure for a certain period of time.

[0028] In this embodiment, the cross-section of the bamboo strip placement groove 8 is rectangular, and both ends of the bamboo strip placement groove in the radial direction along the vertical axis are open, as is the top of the bamboo strip placement groove.

[0029] In this embodiment, the inner wall of the drying chamber 1 is provided with an annular groove 20, which corresponds to the positions of the four bamboo strip placement slots 8. The end of the bamboo strip placement slot 8 away from the vertical rotating shaft 2 extends into the annular groove 8 and slides in cooperation with it. When the vertical rotating shaft drives the four bamboo strip placement slots to rotate, the end of the bamboo strip placement slot away from the vertical rotating shaft slides along the annular groove, so that the bamboo strip placement slot plays a guiding and supporting role when rotating with the vertical rotating shaft.

[0030] In this embodiment, in order to improve the support effect when the bamboo strip placement groove rotates, a sliding roller 21 is installed at the bottom of one end of the bamboo strip placement groove 8 that extends into the annular slide groove 20. When the bamboo strip placement groove 8 rotates in the horizontal plane, the sliding roller 21 rolls along the annular slide groove 20.

[0031] In this embodiment, the front end of the drying chamber 1 is provided with a sealing door, one end of which is hinged to the drying chamber via a hinge. Opening the sealing door facilitates the removal and placement of bamboo strips from the bamboo strip placement slot.

[0032] Specific implementation process:

[0033] During the flattening process, a bamboo strip is placed in each bamboo strip placement groove. The vertical rotating shaft 2 drives the four bamboo strip placement grooves 8 to rotate sequentially into the first flattening cavity 4, the second flattening cavity 5, the third flattening cavity 6, and the pressure holding cavity 7. When the bamboo strip rotates with the bamboo strip placement groove 8 to the first flattening cavity 4, a pair of electric heating plates 16 in the first flattening cavity 4 perform a first drying on the bamboo strip. At the same time, the first flattening pressure roller 9 in the first flattening cavity 4 moves along the bamboo strip placement groove under the drive of the ball screw nut pair, and the first flattening pressure roller 9 flattens the bamboo strip once. After the first flattening and drying, the bamboo strip rotates with the bamboo strip placement groove 8 to the second flattening cavity 5. The pair of electric heating plates 16 in the second flattening cavity 5 perform a second drying on the bamboo strip, and at the same time, the first flattening pressure roller 9 moves along the bamboo strip placement groove 4 under the drive of the ball screw nut pair, and the first flattening pressure roller 9 flattens the bamboo strip once. The second flattening roller 10 in the second flattening cavity 5 moves along the bamboo strip placement groove 8, and the second flattening roller 10 flattens the bamboo strip a second time. After being flattened and dried a second time, the bamboo strip rotates with the bamboo strip placement groove 8 to the third flattening cavity 6. The heating component in the third flattening cavity 6 dries the bamboo strip a third time. At the same time, the third flattening roller 11 in the third flattening cavity 6 moves along the bamboo strip placement groove 8, and the third flattening roller 11 flattens the bamboo strip a third time. After being flattened and dried a third time, the bamboo strip rotates with the bamboo strip placement groove 8 to the pressure holding cavity 7. The pressure holding plate 12 in the pressure holding cavity 7 moves downward and presses down on the bamboo strip. The heating component in the pressure holding cavity 7 dries the bamboo strip, thus achieving pressure holding for the bamboo strip after being flattened and dried a third time.

[0034] If this invention discloses or relates to components or structural parts that are fixedly connected to each other, then, unless otherwise stated, a fixed connection can be understood as: a fixed connection that can be detached (e.g., using bolts or screws), or a fixed connection that cannot be detached (e.g., riveting, welding). Of course, a fixed connection can also be replaced by an integral structure (e.g., manufactured in one piece using a casting process) (except where it is obviously impossible to use an integral molding process).

[0035] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0036] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A method for flattening an arc-shaped bamboo strip, characterized in that: The equipment includes a drying chamber and a vertical rotating shaft installed inside the drying chamber. The drying chamber has a first flattening cavity, a second flattening cavity, a third flattening cavity, and a pressure holding cavity arranged in a circular pattern around the vertical rotating shaft. The outer circumferential wall of the vertical rotating shaft is fixed with four bamboo strip placement slots arranged in a circular pattern. The bamboo strip placement slots extend radially along the vertical rotating shaft. The vertical rotating shaft drives the four bamboo strip placement slots to rotate sequentially into the first flattening cavity, the second flattening cavity, the third flattening cavity, and the pressure holding cavity. Flattening includes the following steps: (1) placing a bamboo strip in each bamboo strip placement slot. The vertical rotating shaft drives the four bamboo strip placement slots to rotate sequentially into the first flattening cavity, the second flattening cavity, the third flattening cavity, and the pressure holding cavity. (2) when the bamboo strip rotates with the bamboo strip placement slot into the first flattening cavity, the heating component in the first flattening cavity dries the bamboo strip once. At the same time, the first flattening pressure roller in the first flattening cavity moves along the bamboo strip placement slot. (3) After the bamboo strips are flattened and dried once, they rotate with the bamboo strip placement groove to the second flattening cavity. The heating component in the second flattening cavity dries the bamboo strips a second time. At the same time, the second flattening pressure wheel in the second flattening cavity moves along the bamboo strip placement groove and flattens the bamboo strips a second time. (4) After the bamboo strips are flattened and dried twice, they rotate with the bamboo strip placement groove to the third flattening cavity. The heating component in the third flattening cavity dries the bamboo strips a third time. At the same time, the third flattening pressure wheel in the third flattening cavity moves along the bamboo strip placement groove and flattens the bamboo strips a third time. (5) After the bamboo strips are flattened and dried three times, they rotate with the bamboo strip placement groove to the pressure holding cavity. The pressure holding plate in the pressure holding cavity moves downward and presses the bamboo strips. The heating component in the pressure holding cavity dries the bamboo strips, thus achieving pressure holding for the bamboo strips after three flattening and drying times. In steps (2)-(4), the heating temperatures of the heating components are different; Heating components are provided inside the first flattening cavity, the second flattening cavity, the third flattening cavity, and the pressure holding cavity. The first flattening cavity, the second flattening cavity, and the third flattening cavity are respectively equipped with a first flattening pressure roller, a second flattening pressure roller, and a third flattening pressure roller that can move along the bamboo strip placement groove, with the heights of the first flattening pressure roller, the second flattening pressure roller, and the third flattening pressure roller decreasing sequentially. The pressure holding cavity is equipped with a liftable pressure holding plate, which is used to cooperate with the bamboo strip placement groove to press the bamboo strips firmly. The first flattening cavity, the second flattening cavity, the third flattening cavity, and the pressure holding cavity all include an upper top plate and a lower bottom plate distributed on the upper and lower sides of the bamboo strip placement groove. The ends of the upper top plate and the lower bottom plate away from the vertical rotating shaft are fixedly connected to the inner wall of the drying chamber. Rotating sleeves are fixed between the upper top plates of the first flattening cavity, the second flattening cavity, the third flattening cavity, and the pressure holding cavity, and between the lower bottom plates of the first flattening cavity, the second flattening cavity, the third flattening cavity, and the pressure holding cavity. The rotating sleeves are sleeved on the outside of the vertical rotating shaft, and the rotating sleeves can rotate relative to the vertical rotating shaft. The heating assembly includes a pair of electric heating plates distributed vertically, which are respectively installed on the bottom surface of the upper top plate and the top surface of the lower bottom plate. The electric heating plates are electrically connected to a temperature controller. The first, second, and third flattening rollers are all driven by a flattening drive mechanism to move along the inside of the bamboo strip placement groove. The flattening drive mechanism includes a ball screw and nut pair arranged radially along the vertical axis. A flattening roller fixing frame is fixedly arranged at the bottom of the moving end of the ball screw and nut pair, and the flattening roller fixing frame is located above the bamboo strip placement groove.

2. The method for flattening an arc-shaped bamboo strip according to claim 1, characterized in that: The pressure plate extends radially along the vertical axis of rotation. The pressure plate is driven to move vertically up and down by a lifting cylinder that is vertically positioned above it. The lifting cylinder is connected to the top of the pressure chamber via a connecting frame.

3. The method for flattening an arc-shaped bamboo strip according to claim 1, characterized in that: The inner wall of the drying chamber is provided with an annular sliding groove, which corresponds to the position of the four bamboo strip placement slots. The end of the bamboo strip placement slot away from the vertical axis extends into the annular sliding groove and slides in cooperation with the annular sliding groove.

4. The method for flattening an arc-shaped bamboo strip according to claim 3, characterized in that: A sliding roller is installed at the bottom of one end of the bamboo strip placement groove that extends into the annular groove, and the sliding roller rolls along the annular groove.

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