A continuous reinforcing device and method for compacting a bamboo toothbrush

Abstract

This invention provides a continuous densification and strengthening device for bamboo toothbrushes, comprising a lifting feeding mechanism, an infrared heating plate, a material transition chamber, and a spraying mechanism. The lifting feeding mechanism is equipped with a helical toothed transmission belt, which drives the bamboo toothbrush handle through the discharge chute of the device to slide towards the infrared heating plate. The infrared heating plate heats the side of the bamboo toothbrush handle with lower density. A flat belt conveyor is installed at the bottom of the material transition chamber, and a spraying mechanism is installed on the side of the material transition chamber. Two sets of push rods in the pressing machine cooperate to place the bamboo toothbrush handle on the lower pressing plate of the pressing machine. The upper pressing plate, pushed by a cylinder rod, presses down on the bamboo toothbrush handle on the lower pressing plate, thus densifying the bamboo toothbrush handle. After processing, the bamboo toothbrush handle is moved towards the discharge chute by the push rod. This invention improves the utilization rate of bamboo by using a heating and warm water softening process.

Description

Technical Field

[0001] This invention belongs to the field of bamboo toothbrush manufacturing technology, specifically relating to a device and method for continuous densification and reinforcement of an integrated bamboo toothbrush. Background Technology

[0002] With the scarcity of timber resources and the market demand for new materials, bamboo, due to its short growth cycle and lightweight yet high-strength mechanical properties, has significant application potential. This has promoted the adoption of more "bamboo-based" products, leading to a surge in bamboo products entering the market. The bamboo industry, including knives, forks, spoons, and toothbrushes, has reached a considerable scale. Bamboo toothbrushes, as daily necessities, have gained a foothold due to their eco-friendly value, and consumers are increasingly demanding higher quality. Standards for bamboo toothbrushes now include an aesthetically pleasing overall structure, a burr-free handle and head, and a bristle tensile strength greater than 15N. However, in actual production, some bamboo toothbrushes suffer from insufficient bristle tensile strength and bristle shedding, affecting usability. This is primarily due to insufficient strength of the bristle attachment material (the toothbrush handle) during the bristle attachment process. The anisotropic nature of bamboo itself results in variations in the strength of the processed bristle blanks during the bristle attachment process. Raw bamboo has a tubular structure, with vascular bundles arranged in a trapezoidal pattern from the outer green layer to the inner yellow layer. The density of vascular bundles is higher on the outer green side and lower on the inner yellow side. Since vascular bundles are the main structural components contributing to the static bending strength and other mechanical properties of bamboo, their density directly determines the overall strength of the bamboo. The density of natural bamboo is 0.4~0.9 g / cm³. 3 Different types of bamboo, and even different parts of the same type of bamboo, exhibit density variations, resulting in significant differences in the surface quality of bamboo products processed directly from natural bamboo. The standard density requirement for bamboo toothbrushes is 0.7 g / cm³. 3 A significant portion of the bamboo toothbrush handles produced on existing production lines have a density of 0.6~0.7 g / cm³. 3 The density fluctuates between 0.63 and 0.78 g / cm³. In actual production, the density distribution of bamboo strips purchased is generally between 0.63 and 0.78 g / cm³. 3 Therefore, over 95% of bamboo has a density of 0.6 g / cm³. 3 The above meets the processing requirements. In actual production, over 70% of the bamboo toothbrush handles produced achieve the acceptable density of 0.7 g / cm³ for bamboo toothbrushes. 3 Less than 30% of bamboo toothbrush handles have a density lower than the acceptable density of 0.7 g / cm3, and their surface needs to be densified.

[0003] The uneven density of bamboo toothbrush blanks not only leads to insufficient strength and affects the appearance quality, but also affects the tensile strength of the bristle bundles in the bamboo toothbrush handle. The existing bamboo toothbrush production lines produce bamboo toothbrushes with a bristle bundle tensile strength of 8~20N, which is different from the bristle bundle tensile strength of more than 15N required in the bamboo toothbrush product standard.

[0004] Furthermore, in the current bristle implantation process for bamboo toothbrushes, the bristles in the brush holes are fixed by a single layer of aluminum sheet, resulting in a small number of bamboo toothbrush products having insufficient bristle tension or even bristle loss. Additionally, products that fail the weighing test on existing production lines are treated as waste, leading to a waste of bamboo materials. Moreover, in the grinding and deburring process, bamboo toothbrush handles are stacked together and placed in a grinding machine. While increasing processing time can improve the overall surface smoothness of the bamboo toothbrush handles, the grinding effect varies from handle to handle, resulting in some handles still having burrs on their surface in subsequent processes.

[0005] Based on this, a device and method for the integrated densification and continuous reinforcement of bamboo toothbrushes are proposed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a device and method for continuous densification and reinforcement of bamboo toothbrushes, in order to address the shortcomings of the prior art mentioned above.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0008] In the first aspect, a continuous strengthening device for compacting bamboo toothbrushes includes a frame, a feeding bin, a lifting feeding mechanism, a material transition bin, a pressing plate, an infrared heating plate, and a spraying mechanism.

[0009] A lifting feeding mechanism is rotatably connected to one side of the frame. The lifting feeding mechanism consists of a drive roller and a helical toothed conveyor belt. A feeding bin is also provided in the frame near the lifting feeding mechanism. A discharge chute is provided on the baffle of the feeding bin. An infrared heating plate is provided on the baffle below the discharge chute.

[0010] A material transition chamber is provided on the lower end of the frame near the infrared heating plate. A spraying mechanism is provided on the side of the material transition chamber on the frame. A pressure plate is provided on the frame at the discharge end of the material transition chamber. An upper pressure plate and a lower pressure plate are provided inside the pressure plate for mutual cooperation. A discharge chute is provided at the tail end of the pressure plate.

[0011] As a further explanation of the present invention, there are two drive rollers, which are rotatably connected inside the frame. The helical toothed conveyor belt is wrapped around the outside of the two drive rollers, and the material in the loading bin is lifted and sent to the discharge chute through the helical toothed conveyor belt.

[0012] As a further explanation of the present invention, the infrared heating plate is fixed to the outside of the baffle by an L-shaped fixing rib, and the lower end of the infrared heating plate is also connected to the outside of the material transition chamber by a fixing rib.

[0013] As a further explanation of the present invention, a flat conveyor belt is rotatably connected to the material transition chamber via two flat pulleys. A first infrared detector is provided at the inlet of the material transition chamber, and a second infrared detector is provided at the outlet of the material transition chamber.

[0014] As a further explanation of the present invention, the flat pulley and one of the drive rollers are respectively driven by a first servo motor mounted on the frame, and the first servo motor is connected to the flat pulley and the drive roller through a first reducer and a belt ring respectively.

[0015] As a further explanation of the present invention, the spraying mechanism includes a water pump, a spraying conduit and a nozzle. The nozzle is fixed on the frame through the spraying conduit, and the spraying area of ​​the nozzle is set above the material transition bin. The spraying conduit is also connected to a water pump, which pumps water from an external water tank into the spraying conduit.

[0016] As a further explanation of the present invention, a lower pressure plate is installed at the bottom of the inner end of the pressure plate, an upper pressure plate is movably connected to the upper part of the inner end of the pressure plate via a cylinder, and a third infrared detector is provided at the feed inlet of the pressure plate.

[0017] As a further explanation of the present invention, a set of first push rods and a set of second push rods are also installed in the area between the lower pressure plate and the upper pressure plate inside the pressure plate. There are two of each set of first push rods and second push rods. The upper surface of the first push rod is a smooth surface and the lower surface is a rack surface. Both the upper and lower surfaces of the second push rod are smooth surfaces. The rack surface of the first push rod is facing downward and is engaged with the gear shaft. The remaining part is in clearance fit with the lower pressure plate and the second push rod. The first push rod is driven by a second servo motor in conjunction with a second reducer and a drive gear. The second push rod is driven by a telescopic shaft in the first cylinder.

[0018] Secondly, a method of using an integrated densification and continuous reinforcement device for bamboo toothbrushes includes the following steps:

[0019] S1. Place the pre-processed bamboo strips, which have been milled into the shape of a bamboo toothbrush handle, into the feeding bin, and then send the bamboo strips to the infrared heating plate through the lifting feeding mechanism. Use infrared heating on the side of the bamboo strips with lower density on the infrared heating plate.

[0020] S2. The bamboo strips, after being heated by infrared on the surface, fall into the material transition bin. During their movement on the flat conveyor belt, they are sprayed with warm water at 50-80℃ using the nozzles of the spraying mechanism, so that the overall moisture content of the bamboo strips is controlled at 55-65%, which is beneficial for subsequent molding processing.

[0021] S3. The bamboo strips are fed into the pressing plate using the material transfer chamber. The mold in the pressing plate can mold 10 bamboo toothbrush handles at a time. The pressure provided by the upper and lower molds is 3-5 MPa, and the hot pressing time is 2 minutes. After hot pressing, the thickness of the bamboo toothbrush handle is compressed by 10%, and the surface density and vascular bundle number are consistent on both the upper and lower surfaces. The average density is reduced from 0.65 g / cm³. 3 Increased to 0.7 g / cm³ 3 .

[0022] S4. The 10 bamboo strips shaped like bamboo toothbrush handles, which are completed in one molding process, are introduced into each material box through the unloading chute to complete the single compaction process.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] This invention uses an infrared heating plate to heat the surface of bamboo strips, treating the surface nutrients and thus providing anti-mildew and anti-corrosion effects. A spraying mechanism treats the bamboo strip surface with water to achieve the required moisture content for molding. A pressing plate densifies the bamboo toothbrush handle, increasing its surface density and creating a denser bamboo strip. This provides the necessary strength for subsequent drilling and bristle implantation, improving not only the bristle tensile strength but also the overall appearance quality of the bamboo toothbrush, making it both economical and practical. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0027] Figure 3 This is a schematic diagram of the internal structure of the material transition chamber and the pressure plate of the present invention;

[0028] Figure 4 This is a schematic diagram of the internal transmission connection structure of the pressure plate of the present invention;

[0029] Figure 5 This is a comparison diagram of the densification treatment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1-First servo motor; 11-First reducer; 2-Second servo motor; 22-Second reducer; 3-Frame; 4-Feeding bin; 41-Baffle; 42-Discharge chute; 5-Lifting feeding mechanism; 51-Drive roller; 52-Helical toothed conveyor belt; 6-Material transition bin; 61-Flat conveyor belt; 62-Flat pulley; 63-First infrared detector; 64-Second infrared detector; 7-Pressure plate; 71-Upper pressure plate; 72-Lower pressure plate; 73-Discharge chute; 74-First push rod; 75-Second push rod; 76-First cylinder; 77-Second cylinder; 78-Third infrared detector; 8-Control box; 9-Infrared heating plate; 91-Fixing rib; 10-Spraying mechanism; 101-Water pump; 102-Spraying duct; 103-Spray head. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figure 1-3 As shown, the present invention provides a technical solution: a bamboo toothbrush integrated densification and continuous reinforcement device, including a frame 3, a feeding bin 4, a lifting feeding mechanism 5, a material transition bin 6, a pressing plate 7, an infrared heating plate 9, and a spraying mechanism 10.

[0034] A lifting feeding mechanism 5 is rotatably connected to one side of the frame 3. The lifting feeding mechanism 5 consists of a drive roller 51 and a helical toothed conveyor belt 52. There are two drive rollers 51, which are rotatably connected to the frame 3 respectively. The helical toothed conveyor belt 52 is wrapped around the outside of the two drive rollers 51. The material in the loading bin 4 is lifted and sent to the discharge chute 42 by the helical toothed conveyor belt 52.

[0035] A feeding bin 4 is also provided inside the frame 3 near the lifting feeding mechanism 5. A discharge chute 42 is provided on the baffle 41 of the feeding bin 4. An infrared heating plate 9 is provided on the baffle 41 below the discharge chute 42. The infrared heating plate 9 is fixed to the outside of the baffle 41 by an L-shaped fixing rib 91, and the lower end of the infrared heating plate 9 is also connected to the outside of the material transition bin 6 by the fixing rib 91.

[0036] A material transition chamber 6 is provided on the lower end of the frame 3 near the infrared heating plate 9. A flat conveyor belt 61 is rotatably connected to the material transition chamber 6 through two flat pulleys 62. A first infrared detector 63 is provided at the inlet of the material transition chamber 6, and a second infrared detector 64 is provided at the outlet of the material transition chamber 6.

[0037] The flat pulley 62 and one of the drive rollers 51 are driven by a first servo motor 1 mounted on the frame 3. The first servo motor 1 is connected to the flat pulley 62 and the drive roller 51 through a first reducer 11 and a belt ring, respectively.

[0038] A spraying mechanism 10 is provided on the side of the material transition chamber 6 on the frame 3. The spraying mechanism 10 includes a water pump 101, a spraying conduit 102 and a nozzle 103. The nozzle 103 is fixed on the frame 3 through the spraying conduit 102, and the spraying area of ​​the nozzle 103 is set above the material transition chamber 6. The spraying conduit 102 is also connected to the water pump 101, and the water pump 101 pumps water from an external water tank into the spraying conduit 102.

[0039] A pressure plate 7 is provided on the frame 3 at the discharge end of the material transition chamber 6. The pressure plate 7 is provided with an upper pressure plate 71 and a lower pressure plate 72 that cooperate with each other. A discharge chute 73 is provided at the tail end of the pressure plate 7.

[0040] A set of first push rods 74 and a set of second push rods 75 are also installed in the area between the upper pressure plate 71 and the lower pressure plate 72 in the pressure plate 7. There are two of each set of first push rods 74 and second push rods 75. The upper surface of the first push rod 74 is a smooth surface and the lower surface is a rack surface. Both the upper and lower surfaces of the second push rod 75 are smooth surfaces. The rack surface of the first push rod 74 is facing downward and is engaged with the gear shaft. The remaining part is in clearance fit with the lower pressure plate and the second push rod 75. The first push rod 75 is driven by the second servo motor 2 in conjunction with the second reducer 22 and the drive gear. The second push rod 75 is driven by the telescopic shaft in the first cylinder 76.

[0041] The method of using the above-mentioned integrated densification and continuous reinforcement device for bamboo toothbrushes includes the following steps:

[0042] S1. Place the pre-processed bamboo strips into the shape of a bamboo toothbrush handle into the feeding bin 4, and then send the bamboo strips to the infrared heating plate 9 through the lifting feeding mechanism 5. Use infrared heating on the side of the bamboo strip with lower density on the infrared heating plate 9.

[0043] S2. The bamboo strips, after being heated by infrared on the surface, fall into the material transition chamber 6. During their movement on the flat conveyor belt 61, they are sprayed with warm water at 50-80°C by the nozzles 103 of the spraying mechanism 10, so that the overall moisture content of the bamboo strips is controlled at 55-65%, which is beneficial for subsequent molding processing.

[0044] S3. The bamboo strips are fed into the pressing plate 7 through the material transfer chamber 6. The mold in the pressing plate 7 can complete the molding of 10 bamboo toothbrush handles at a time. The pressure provided by the upper and lower molds is 3-5 MPa, and the hot pressing time is 2 minutes. After hot pressing, the thickness of the bamboo toothbrush handle is compressed by 10%, and the density and vascular bundle number of the upper and lower surfaces are consistent. The average density is reduced from 0.65 g / cm³. 3 Increased to 0.7 g / cm³ 3 .

[0045] S4. The 10 bamboo strips shaped like bamboo toothbrush handles, which are completed in one molding process, are introduced into each material box through the unloading chute to complete the single compaction process.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for using an integrated densification and continuous reinforcement device for bamboo toothbrushes, characterized in that: The device includes a frame (3), a feeding bin (4), a lifting feeding mechanism (5), a material transfer bin (6), a pressing machine (7), an infrared heating plate (9), and a spraying mechanism (10). A lifting feeding mechanism (5) is rotatably connected to one side of the frame (3). The lifting feeding mechanism (5) consists of a drive roller (51) and a helical tooth conveyor belt (52). A feeding bin (4) is also provided in the frame (3) near the lifting feeding mechanism (5). A discharge chute (42) is provided on the baffle (41) of the feeding bin (4). An infrared heating plate (9) is provided on the baffle (41) below the discharge chute (42). A material transition chamber (6) is provided on the lower end of the frame (3) near the infrared heating plate (9). A spraying mechanism (10) is provided on the side of the material transition chamber (6) on the frame (3). A pressing machine (7) is provided on the frame (3) at the discharge end of the material transition chamber (6). An upper pressing plate (71) and a lower pressing plate (72) are provided inside the pressing machine (7) for mutual cooperation. A discharge chute (73) is provided at the tail end of the pressing machine (7). The lower pressure plate (72) is installed at the bottom of the press (7), and the upper pressure plate (71) is movably connected to the upper part of the press (7) through a cylinder (77). A third infrared detector (78) is provided at the feed inlet of the press (7). In the area between the upper pressure plate (71) and the lower pressure plate (72) of the press (7), a set of first push rods (74) and a set of second push rods (75) are also installed. There are two of each set of first push rods (74) and second push rods (75). The upper surface of the first push rod (74) is a smooth surface and the lower surface is a rack surface. The upper and lower surfaces of the second push rod (75) are both smooth surfaces. The rack surface of the first push rod (74) is down and meshes with the gear shaft. The rest of the part is in clearance fit with the lower pressure plate (72) and the second push rod (75). The first push rod (74) is driven by the second servo motor (2) in conjunction with the second reducer (22) and the drive gear. The second push rod (75) is driven by the telescopic shaft in the first cylinder (76). The method of use includes the following steps: S1. Place the pre-processed bamboo strips into the shape of bamboo toothbrush handles into the feeding bin (4), and then send the bamboo strips to the infrared heating plate (9) through the lifting feeding mechanism (5). Use infrared heating on the side of the bamboo strip with lower density on the infrared heating plate (9). S2. The bamboo strips heated by infrared on the surface fall into the material transition bin (6). During the movement on the flat conveyor belt (61), warm water of 50-80°C is sprayed by the nozzle (103) of the spraying mechanism (10), so that the moisture content of the bamboo strips is controlled at 55-65%, which is beneficial to the subsequent molding process. S3. Using the material transfer chamber (6), the bamboo strips are fed into the pressing machine (7). The mold in the pressing machine (7) can complete the molding of 10 bamboo toothbrush handles at a time. The pressure provided by the upper and lower molds is 3-5 MPa, and the hot pressing time is 2 minutes. After hot pressing, the thickness of the bamboo toothbrush handle is compressed by 10%, and the density of the upper and lower surfaces and the number of vascular bundles are consistent. The average density is 0.65 g / cm³. 3 Increased to 0.7 g / cm³ 3 , S4. The 10 bamboo strips shaped like bamboo toothbrush handles, which are completed in one molding process, are introduced into each material box through the unloading chute to complete the single compaction process.

2. The method of using the integrated densification and continuous reinforcement device for bamboo toothbrushes according to claim 1, characterized in that, Two drive rollers (51) are provided and are rotatably connected in the frame (3). The helical toothed conveyor belt (52) is wrapped around the outside of the two drive rollers (51) and the material in the loading bin (4) is lifted and sent to the discharge chute (42) through the helical toothed conveyor belt (52).

3. The method of using the integrated densification and continuous reinforcement device for bamboo toothbrushes according to claim 1, characterized in that, The infrared heating plate (9) is fixed to the outside of the baffle (41) by an L-shaped fixing rib (91), and the lower end of the infrared heating plate (9) is also connected to the outside of the material transition chamber (6) by the fixing rib (91).

4. The method of using the integrated densification and continuous reinforcement device for bamboo toothbrushes according to claim 1, characterized in that, The material transition bin (6) is rotatably connected to a flat conveyor belt (61) via two flat pulleys (62). A first infrared detector (63) is installed at the inlet of the material transition bin (6), and a second infrared detector (64) is installed at the outlet of the material transition bin (6).

5. The method of using the integrated densification and continuous reinforcement device for bamboo toothbrushes according to claim 4, characterized in that, The flat pulley (62) and one of the drive rollers (51) are driven by a first servo motor (1) mounted on the frame (3). The first servo motor (1) is connected to the flat pulley (62) and the drive roller (51) through a first reducer (11) and a belt ring.

6. The method of using the integrated densification and continuous reinforcement device for bamboo toothbrushes according to claim 1, characterized in that, The spraying mechanism (10) includes a water pump (101), a spraying conduit (102) and a nozzle (103). The nozzle (103) is fixed on the frame (3) through the spraying conduit (102), and the spraying area of ​​the nozzle (103) is set above the material transition bin (6). The spraying conduit (102) is also connected to the water pump (101), and the water pump (101) pumps water from the external water tank into the spraying conduit (102).

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