A bamboo strip flattening device for preventing cracking

Abstract

The present invention relates to a bamboo chip flattening device for preventing cracking, comprising a bamboo chip conveyor belt for conveying bamboo chips in the transverse direction, a flattening platform is horizontally arranged at the inner upper end of the bamboo chip conveyor belt, the top surface of the flattening platform contacts the inner top surface of the bamboo chip conveyor belt, a plurality of flattening components are arranged in sequence from left to right above the bamboo chip conveyor belt, the spacing between the plurality of flattening components and the bamboo chip conveyor belt gradually decreases from left to right, the flattening components comprise a plurality of flattening rollers distributed in the transverse direction, the spacing between the plurality of flattening rollers of each flattening component and the bamboo chip conveyor belt also gradually decreases from left to right. The flattening components with gradually decreasing spacing between the plurality of flattening rollers in each flattening component and the bamboo chip conveyor belt are matched, and the spacing between the plurality of flattening rollers in each flattening component and the bamboo chip conveyor belt also gradually decreases, so that the deformation of the bamboo chip is small each time it is flattened, and each flattening is carried out gradually and slowly, effectively reducing the residual stress in the bamboo chip, thereby playing a good role in preventing cracking.

Description

Technical field:

[0001] The invention relates to a bamboo chip flattening device for preventing cracking. Background technology:

[0002] Bamboo has a dense structure, smooth texture, and clear grain, making it a very good decorative material. In the current period when wood is in short supply, it is more important to strengthen the research and development of bamboo products. Bamboo has a wide range of uses, such as flooring, furniture and other appliances; the requirements for bamboo processing accuracy and aesthetics are higher than those for wood, so bamboo processing equipment with equipment design is required. When processing bamboo, the cylindrical bamboo is first processed into bamboo pieces of equal width and thickness, and then the bamboo pieces are flattened and the bamboo green and bamboo yellow are planed off.

[0003] In the prior art, when flattening the curved bamboo pieces, several pairs of rollers are usually used in combination, with the front pairs of rollers flattening the bamboo pieces, and the rear pairs of rollers maintaining the pressure on the flattened bamboo pieces. In this flattening method, the roller gap distance of each pair of rollers is the same. Direct flattening in the initial stage will increase the internal stress of the bamboo pieces. If this internal stress is not eliminated, the bamboo pieces are prone to cracking or rebounding after a period of use, affecting the quality and life of the final product.

[0004] At present, there are also some bamboo chip flattening methods that use a gradual roller gap method, such as the bamboo chip roller press with a gradual roller gap disclosed in Chinese Patent Publication No. CN203510386U. This patent uses multiple pairs of rollers arranged continuously side by side, and the roller gaps between multiple pairs of upper and lower rollers gradually decrease from the feed end to the discharge end of the frame. In this structure, since multiple pairs of rollers are arranged continuously side by side, the bamboo chips are only flattened once during operation. In this single flattening method, the one-time deformation of the arc-shaped bamboo chips is large, and its internal stress still cannot be effectively eliminated, and it is still prone to cracking during subsequent use. For this reason, how to effectively reduce the cracking of bamboo chips after flattening has become a technical problem that needs to be solved urgently, and this case is born from this. Summary of the invention:

[0005] The present invention makes improvements on the problems existing in the above-mentioned prior art, that is, the technical problem to be solved by the present invention is to provide a bamboo chip flattening device for preventing cracking, which has a reasonable design and can effectively reduce cracking of bamboo chips.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a crack-proof bamboo chip flattening device, comprising a bamboo chip conveyor belt for conveying bamboo chips from left to right in the horizontal direction, a flattening platform is horizontally arranged at the inner upper end of the bamboo chip conveyor belt, the top surface of the flattening platform is in contact with the inner top surface of the bamboo chip conveyor belt, and a plurality of levels of flattening components are arranged on the top of the bamboo chip conveyor belt from left to right in sequence, and the spacing between the plurality of levels of flattening components and the bamboo chip conveyor belt gradually decreases from left to right. The flattening component comprises a plurality of flattening rollers spaced apart in the horizontal direction, and the spacing between the plurality of flattening rollers of each level of flattening component and the bamboo chip conveyor belt also gradually decreases from left to right.

[0007] Furthermore, the flattening assembly also includes a flattening sealing cover with an open bottom, which is driven up and down by a lifting cylinder to cover the top of the bamboo conveyor belt, and the top of the flattening sealing cover is connected to a high-pressure gas input pipe; a plurality of flattening rollers are arranged inside the flattening sealing cover.

[0008] Furthermore, a first vertical cylinder is vertically connected to the left end of the top of the flattening sealing cover, a cylinder rod of the first vertical cylinder extends into the flattening sealing cover and a lifting frame is connected to the end thereof, and a plurality of flattening rollers are installed at the lower end of the lifting frame.

[0009] Furthermore, a second vertical cylinder is vertically arranged at the right end of the interior of the flattening sealing cover, and the second vertical cylinder is installed on the inner top surface of the flattening sealing cover. The cylinder rod of the second vertical cylinder extends downward and a horizontally arranged microwave pressure maintaining plate is fixed at the end.

[0010] Furthermore, a plurality of far-infrared heaters are installed on the inner top surface of the flattened sealing cover.

[0011] Furthermore, the top of the flattening platform is provided with a downwardly recessed transverse groove directly below each flattening component, and a liftable flattening support block is provided inside the transverse groove. The upper end of the flattening support block is provided with an arc-shaped convex portion for lifting the bamboo conveyor belt upward and adapting to the inside of the bamboo piece, and the bottom of the flattening support block is connected to the bottom of the transverse groove through a plurality of elastic parts that extend and retract vertically.

[0012] Furthermore, a heating component for heating and softening the bamboo pieces is provided above the left end of the bamboo piece conveyor belt.

[0013] Furthermore, a conveyor belt cleaning assembly is provided above the right end of the bamboo conveyor belt, and the conveyor belt cleaning assembly includes a longitudinally arranged cleaning roller, the outer circumferential surface of the cleaning roller is provided with bristles for contacting the surface of the bamboo conveyor belt, and the upper cover of the cleaning roller is provided with a dust removal hood with an open bottom, and the top of the dust removal hood is connected to the dust removal fan through a dust removal pipe.

[0014] Compared with the prior art, the present invention has the following effects: the present invention is reasonably designed, and adopts a multi-level flattening component with a gradually decreasing spacing between the flattening rollers and the bamboo conveyor belt. At the same time, the spacing between several flattening rollers in each level of the flattening component and the bamboo conveyor belt is also gradually reduced, so that the deformation of the bamboo strip is small each time it is flattened, and each flattening is carried out gradually and slowly, which effectively reduces the residual stress in the bamboo strip, thereby playing a good anti-cracking role. Description of the drawings:

[0015] Figure 1 is a schematic diagram of the main structure of an embodiment of the present invention;

[0016] Figure 2 is a schematic diagram of the structure of a flattening assembly in an embodiment of the present invention;

[0017] Figure 3 Schematic diagram of the structure of the conveyor belt cleaning assembly in an embodiment of the present invention;

[0018] Figure 4 It is a schematic diagram of the coordinated structure of the flattening support block, the flattening platform and the bamboo conveyor belt in an embodiment of the present invention. Specific implementation method:

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

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

[0021] like Figures 1 to 4As shown, the present invention provides a crack-proof bamboo chip flattening device, comprising a bamboo chip conveyor belt 1, which is used to convey arc-shaped bamboo chips 2 placed horizontally with their arc mouths facing downwards from left to right in the horizontal direction, a flattening platform 3 is horizontally arranged at the upper inner end of the bamboo chip conveyor belt 1, the top surface of the flattening platform 3 is in contact with the inner top surface of the bamboo chip conveyor belt 1, and the flattening platform 3 is used to support the bamboo chips when flattening; a plurality of levels of flattening assemblies are arranged in sequence from left to right above the bamboo chip conveyor belt 1, the plurality of levels of flattening assemblies are used to perform multi-level flattening on the bamboo chips, the spacing between the plurality of levels of flattening assemblies and the bamboo chip conveyor belt 1 gradually decreases from left to right, the flattening assembly comprises a plurality of flattening rollers 4 spaced apart in the horizontal direction, and the spacing between the plurality of flattening rollers 4 of each level of flattening assembly and the bamboo chip conveyor belt 1 also gradually decreases from left to right. A multi-level flattening component with a gradually decreasing spacing between the flattening rollers and the bamboo conveyor belt is used. At the same time, the spacing between several flattening rollers in each level of the flattening component and the bamboo conveyor belt is also gradually reduced, so that the deformation of the bamboo strips is small each time they are flattened, and each flattening is carried out gradually and slowly, which effectively reduces the residual stress in the bamboo strips and thus plays a good role in preventing cracking.

[0022] The plurality of flattening components include a primary flattening component 5, a secondary flattening component 6 and a tertiary flattening component 7 which are sequentially distributed from left to right. The primary flattening component, the secondary flattening component and the tertiary flattening component have the same structure. When the bamboo conveyor belt conveys the bamboo pieces from left to right, the primary flattening component, the secondary flattening component and the tertiary flattening component perform three-level flattening on the bamboo pieces in turn.

[0023] In another embodiment, the flattening assembly further comprises a flattening sealing cover 8 with an open bottom, the flattening sealing cover 8 is driven by a lifting cylinder 9 to move up and down, and is arranged on the top of the bamboo conveyor belt, and the top of the flattening sealing cover 8 is connected to a high-pressure gas input pipe 10; a plurality of flattening rollers 4 are arranged inside the flattening sealing cover 8. When working, the flattening sealing cover 8 is located above the bamboo conveyor belt 1 in the initial state, when the bamboo conveyor belt 1 conveys the bamboo pieces to the left end inside the flattening sealing cover 8, the bamboo conveyor belt 1 stops working, and the lifting cylinder 9 drives the flattening sealing cover 8 to move downward and cover the bamboo pieces, at which time the bottom of the flattening sealing cover 8 contacts the surface of the bamboo conveyor belt 1 to form a closed space, and then the high-pressure gas input pipe 10 conveys high-pressure gas to the inside of the flattening sealing cover to increase the pressure inside the flattening sealing cover to form a high-pressure flattening environment; finally, the bamboo conveyor belt continues to convey the bamboo pieces from left to right, and a plurality of flattening rollers flatten the bamboo pieces. By flattening the bamboo pieces under high pressure, the flattening efficiency is effectively improved.

[0024] In another embodiment, the left end of the top of the flattening sealing cover 8 is connected to a vertically arranged first vertical cylinder 11, the cylinder rod of the first vertical cylinder 11 extends into the flattening sealing cover 8 and the end is connected to a lifting frame 12, and a plurality of flattening rollers 4 are installed at the lower end of the lifting frame 12. The first vertical cylinder drives the plurality of flattening rollers to rise and fall vertically, so as to adjust the spacing between the flattening rollers and the bamboo strip conveyor belt, thereby adjusting the deformation amount of the bamboo strips during a single flattening.

[0025] In another embodiment, a second vertical cylinder 13 is vertically arranged at the right end of the flattening sealing cover 8. The second vertical cylinder 13 is installed on the top surface of the flattening sealing cover 8. The cylinder rod of the second vertical cylinder 13 extends downward and a horizontally arranged microwave pressure-maintaining plate 14 is fixed at the end, that is, pressure is maintained after each level of flattening. After the bamboo slices are flattened by several flattening rollers, the bamboo slice conveyor belt conveys the bamboo slices to the bottom of the microwave pressure-maintaining plate. The second vertical cylinder drives the microwave pressure-maintaining plate to move downward and press the bamboo slices to maintain pressure on the bamboo slices. At the same time, the electronic components inside the microwave pressure-maintaining plate emit electromagnetic waves. At this time, the field energy of the microwave field is converted into heat energy in the bamboo slices, achieving the purpose of microwave heating and drying.

[0026] In another embodiment, a plurality of far-infrared heaters 15 are installed on the inner top surface of the flattening sealing cover 8. The far-infrared heaters 15 can heat the inside of the flattening sealing cover 8 and form a high-temperature and high-pressure flattening environment in combination with the high-pressure gas input pipe, which is conducive to better and faster deformation of the bamboo pieces and improves the flattening quality and efficiency.

[0027] In another embodiment, if Figure 4 As shown, the top of the flattening platform 3 is provided with a downwardly concave transverse groove 16 just below each flattening component, and a liftable flattening support block 17 is provided inside the transverse groove 16. The upper end of the flattening support block 17 is provided with an arc-shaped protrusion 18 for lifting the bamboo conveyor belt 1 upward and matching with the inside of the bamboo piece, and the bottom of the flattening support block 17 is connected to the bottom of the transverse groove 16 through a plurality of elastic members 19 that extend and retract vertically. Since the bamboo strips are conveyed from left to right with the arc opening facing downward, a flattening support block protruding upward is provided on the flattening platform. The arc-shaped convex portion of the flattening support block lifts the bamboo strip conveyor belt upward and extends into the interior of the bamboo strip. The arc-shaped convex portion matches the internal shape of the bamboo strip and plays a role in supporting the interior of the bamboo strip. When the flattening roller contacts the bamboo strip, the arc-shaped convex portion supports the interior of the bamboo strip, effectively reducing the internal deformation of the bamboo strip to generate large internal stress, thereby causing cracking. At the same time, the flattening support block is connected to the transverse groove by an elastic member that expands and contracts vertically. During the flattening process, the flattening support block will move downward and squeeze the elastic member, and the elastic member will be used to generate upward elastic force to achieve a flexible flattening effect. Compared with traditional rigid flattening, it can effectively reduce the generation of internal stress in the bamboo strip.

[0028] In another embodiment, a heating component 20 for heating and softening the bamboo chips is provided above the left end of the bamboo chip conveyor belt 1. The heating component 20 may be a far-infrared heater so as to heat and soften the bamboo chips before flattening.

[0029] In another embodiment, since some debris will be generated when the bamboo pieces are deformed during the flattening process, these debris will remain on the surface of the bamboo conveyor belt. A conveyor belt cleaning component 21 is provided above the right end of the bamboo conveyor belt 1. The conveyor belt cleaning component is used to clean the debris remaining on the surface of the bamboo conveyor belt so as to affect the next flattening. Further, the conveyor belt cleaning component 21 includes a longitudinally arranged cleaning roller 22, which is driven to rotate by a cleaning motor. The outer circumferential surface of the cleaning roller 22 is provided with bristles 23 for contacting the surface of the bamboo conveyor belt 1. When the cleaning roller rotates, the bristles are used to brush away the debris on the surface of the bamboo conveyor belt; the upper cover of the cleaning roller 22 is provided with a dust cover 24 with an open bottom, and the top of the dust cover 24 is connected to the dust removal fan through a dust removal pipe 25, so as to suck away the debris brushed away by the cleaning roller.

[0030] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).

[0031] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the present invention include states or shapes that are approximate, similar, or close to them.

[0032] Any component provided by the present invention may be assembled from a plurality of separate components, or may be a separate component manufactured by an integral forming process.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A bamboo chip flattening device for preventing cracking, comprising a bamboo chip conveyor belt for conveying bamboo chips from left to right in a transverse direction, characterized in that: A flattening platform is horizontally arranged at the inner upper end of the bamboo conveyor belt, and the top surface of the flattening platform contacts the inner top surface of the bamboo conveyor belt. A plurality of flattening assemblies are arranged on the top of the bamboo conveyor belt from left to right, and the spacing between the plurality of flattening assemblies and the bamboo conveyor belt gradually decreases from left to right. The flattening assembly includes a plurality of flattening rollers spaced apart in the transverse direction, and the spacing between the plurality of flattening rollers of each flattening assembly and the bamboo conveyor belt also gradually decreases from left to right. The flattening assembly also includes a flattening roller with an open bottom. The sealing cover is driven by a lifting cylinder to move up and down, and the cover is arranged on the top of the bamboo conveyor belt. The top of the flattening sealing cover is connected with a high-pressure gas input pipe; a plurality of flattening rollers are arranged inside the flattening sealing cover; the left end of the top of the flattening sealing cover is connected with a vertically arranged first vertical cylinder, the cylinder rod of the first vertical cylinder extends into the flattening sealing cover and the end is connected with a lifting frame, and a plurality of flattening rollers are installed at the lower end of the lifting frame; the right end of the interior of the flattening sealing cover is provided with a vertically arranged second vertical gas cylinder. The second vertical cylinder is installed on the inner top surface of the flattening sealing cover, the cylinder rod of the second vertical cylinder extends downward and a horizontally arranged microwave pressure-maintaining plate is fixed at the end; a plurality of far-infrared heaters are installed on the inner top surface of the flattening sealing cover; the top of the flattening platform is provided with a downwardly concave transverse groove just below each flattening component, a liftable flattening support block is provided inside the transverse groove, and an arc-shaped convex portion is provided on the upper end of the flattening support block for lifting the bamboo conveyor belt upward and matching the inside of the bamboo piece, so as to flatten The bottom of the support block is connected to the bottom of the transverse groove through a plurality of elastic members that extend and retract vertically; a heating component for heating and softening the bamboo chips is provided above the left end of the bamboo conveyor belt; a conveyor belt cleaning component is provided above the right end of the bamboo conveyor belt, and the conveyor belt cleaning component includes a longitudinally arranged cleaning roller, the outer circumferential surface of the cleaning roller is provided with bristles for contacting the surface of the bamboo conveyor belt, and a dust cover with an open bottom is provided above the cleaning roller, and the top of the dust cover is connected to the dust removal fan through a dust removal pipe.

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