A tobacco tow spreading device

Abstract

The application belongs to the technical field of cigarette processing, and particularly relates to a tobacco tow spreading device, which comprises a first-level spreading mechanism and a first-level spreading assembly. The first-level spreading assembly comprises a first clamping plate and a second clamping plate which are fixedly connected. Opposite end faces of the first clamping plate and the second clamping plate are provided with trapezoidal grooves and triangular grooves. The trapezoidal grooves are connected with the two triangular grooves through arc grooves. After the first clamping plate and the second clamping plate are clamped, the trapezoidal grooves of the first clamping plate and the second clamping plate jointly form a tow channel with a narrow lower end and a wide upper end. The triangular grooves of the first clamping plate and the second clamping plate jointly form two negative pressure chambers. The arc grooves of the first clamping plate and the second clamping plate jointly form airflow holes which are connected with the tow channel and the negative pressure chambers. A positive pressure chamber is arranged in the first clamping plate and the second clamping plate. The positive pressure chamber is connected with the trapezoidal grooves through downwardly inclined air inlet holes. The first-level spreading mechanism can realize posture stabilization of sheet-shaped tow and comprehensive spreading in the state.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of cigarette processing, and particularly relates to a tobacco tow spreading device. BACKGROUND

[0002] The filter tip at the front end of a cigarette is also called a filter rod, and the filter rod is composed of tow located inside and a plug wrap located outside, wherein the tow raw material is in a sheet shape, in order to facilitate transportation, the sheet-shaped tow is extruded into a cuboid after being stacked in multiple layers, and each layer of tow is arranged in a U shape, since the tow raw material is in a sheet shape and is extruded, the thickness and width of the tow are not uniform, in order to meet the processing requirements, the tow needs to be spread multiple times.

[0003] In the prior art, the method for spreading the tow is to use a combination of a comb and a spreading wheel, the sheet-shaped tow in a stacked state is first spread by the comb, and then the width of the tow is spread by the spreading wheel, and finally the tow is introduced into a forming cavity. During the replacement of the tow, one end of the tow needs to be passed through the comb and start the trial operation, when there is no stable traction at the rear side, the effect of spreading the tow by the comb is poor, and after multiple adjustments, the machine can be normally started and operated, therefore, the time spent and the amount of tow raw material wasted during the adjustment process are always high.

[0004] Therefore, how to overcome the above-mentioned technical problems and defects becomes a problem that needs to be solved. SUMMARY

[0005] The application aims to provide a tobacco tow spreading device to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme: a tobacco tow spreading device, comprising a first-level spreading mechanism, a second-level spreading mechanism and a third-level spreading mechanism.

[0007] The primary expansion mechanism includes a dustproof box and a support rod and a primary expansion assembly disposed within the dustproof box. The lower end of the support rod is hinged to the inner wall of the dustproof box, and an assembly plate is provided at the upper end of the support rod. A sleeve is provided on the lower surface of the assembly plate, and a through hole corresponding to the sleeve is provided inside the assembly plate. An arc-shaped guide plate is provided on the upper surface of the assembly plate. The primary expansion assembly includes a first buckle plate and a second buckle plate fixedly connected. The opposite end faces of the first buckle plate and the second buckle plate are provided with trapezoidal grooves and triangular grooves located on both sides of the trapezoidal grooves. The trapezoidal groove on the first buckle plate is connected to the two... The triangular grooves are connected to each other, and the trapezoidal groove on the second buckle is connected to the two triangular grooves by arc grooves. After the first buckle and the second buckle are fastened together, the trapezoidal grooves of the first buckle and the second buckle together form a filament channel that is narrow at the bottom and wide at the top. The triangular grooves of the first buckle and the second buckle form two negative pressure chambers. The negative pressure chambers are connected to negative pressure pipelines. The arc grooves of the first buckle and the second buckle form an airflow hole that connects the filament channel and the negative pressure chambers. Positive pressure chambers are provided in both the first buckle and the second buckle. The positive pressure chambers are connected to the trapezoidal grooves by downward-sloping air inlets.

[0008] Furthermore, the upper end of the trapezoidal groove is provided with multiple elongated comb teeth, which are distributed radially in a fan shape.

[0009] Furthermore, the secondary widening mechanism includes a main widening wheel and a secondary widening wheel. The main widening wheel is externally connected to a drive motor. A flexible outer sleeve is fixedly fitted on the outside of the main widening wheel. The flexible outer sleeve is spindle-shaped. The secondary widening wheel is a grooved wheel. The outer wall of the flexible outer sleeve is in contact with the secondary widening wheel. Transmission gears are coaxially fixed on the spindles of the main widening wheel and the secondary widening wheel, respectively. In the state of synchronous opposite-direction meshing transmission of the two transmission gears, the secondary widening wheel rotates in the opposite direction and with increased speed relative to the main widening wheel.

[0010] Furthermore, the secondary widening mechanism consists of two sets, with the main widening wheel and the auxiliary widening wheel in the two sets of secondary widening mechanisms being in opposite positions.

[0011] Furthermore, the three-stage widening mechanism includes a detachably connected upper pressure plate and a base. The lower surface of the upper pressure plate is provided with a first filament entry groove, and the top of the first filament entry groove is provided with upper comb teeth. The upper surface of the base is provided with a second filament entry groove, and the second filament entry groove is provided with lower comb teeth. After the upper pressure plate and the base are fastened together, the first filament entry groove and the second filament entry groove form a filament entry hole. The upper comb teeth and the lower comb teeth are spatially staggered.

[0012] Furthermore, a first magnetic plate is fixedly connected to the lower surface of the upper pressure plate, and a second magnetic plate that is attracted to the first magnetic plate is fixedly connected to the upper surface of the base.

[0013] Furthermore, the upper pressure plate and the base are detachably connected by bolts.

[0014] Furthermore, it also includes a guiding mechanism located above the secondary spreading mechanism, comprising a guide bracket, a first guide wheel, and a second guide wheel. A ramp platform is provided on the guide bracket, and a filament passage gap is provided between the first guide wheel and the second guide wheel. The filaments drawn from the primary spreading mechanism at a higher position enter the filament passage gap at a lower position after passing through the ramp platform.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The tobacco tow widening device disclosed in this invention comprises a primary widening assembly consisting of a first buckle plate and a second buckle plate fastened together, which can fully widen sheet-like tows, specifically as follows:

[0017] After the filter rod forming equipment stops, the sheet-like filament bundles are guided from below into the filament bundle channel, which is narrow at the bottom and wide at the top. The positive pressure chamber located inside the first and second buckle plates is connected to a high-pressure pipeline. The high-pressure airflow enters the filament bundle channel through the air inlet. Since the air inlet is arranged at an angle downward, it can blow the relaxed sheet-like filament bundles at an angle downward. At the same time, the negative pressure chambers located on both sides are connected to negative pressure pipelines. A suction force is formed at the airflow hole between the negative pressure chamber and the filament bundle channel, which can adsorb the side of the filament bundle. At this time, the posture of the sheet-like filament bundle tends to be stable, and impurities in the filament bundle can be removed.

[0018] The stable sheet-like filament bundles are unfolded after passing through the long strip-shaped comb teeth at the upper end of the trapezoidal groove, and then enter the guiding mechanism;

[0019] This invention redesigns the primary spreading mechanism, which can remove doped substances from the filament bundle and achieve posture stability and full unfolding of the sheet-like filament bundle in the same mechanism.

[0020] 2. The tobacco tow widening device disclosed in this invention has a flexible outer sleeve fixed to the outside of the main widening wheel in the secondary widening mechanism. After assembly, the outer wall of the flexible outer sleeve contacts the secondary widening wheel. In addition, the spindle-shaped design of the flexible outer sleeve and the grooved design of the secondary widening wheel, which rotates at an accelerated speed, can perform the first expansion of the tow squeezed between the two parts.

[0021] The design of two sets of two-stage widening mechanisms with the positions of the main widening roller and the auxiliary widening roller swapped can not only widen the filament bundle twice, but also widen it from both sides of the filament bundle separately, avoiding large local thickness caused by widening on one side, and ensuring uniform thickness of the filament bundle after widening.

[0022] 3. The tobacco tow widening device disclosed in this invention includes a three-stage widening mechanism comprising a detachably connected upper pressure plate and a base. The upper pressure plate has upper comb teeth at the top of the first groove where the tow enters, and the lower comb teeth of the base have lower comb teeth at the second groove where the tow enters, which are spatially staggered, allowing the tow to be widened from different positions, further ensuring uniform thickness of the tow.

[0023] As can be seen from the above, the three-stage widening mechanism design in this invention can achieve high-efficiency unfolding and widening of the filament bundle, reduce the working time and waste in the debugging process, and save on filter rod forming and processing efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the first buckle plate of the present invention;

[0026] Figure 3 for Figure 2 Enlarged view of section A (labeled A);

[0027] Figure 4 This is a schematic diagram of the structure of the two-stage expansion mechanism of the present invention;

[0028] Figure 5 for Figure 4 Enlarged view at point B (Chinese character symbol);

[0029] Figure 6 This is a schematic diagram of the three-stage widening mechanism of the present invention;

[0030] Figure 7 for Figure 6 Enlarged view of the figure marked C.

[0031] Explanation of reference numerals in the attached figures:

[0032] 11. Dustproof box; 12. Support rod; 13. Assembly plate; 14. Sleeve; 15. Arc-shaped guide plate; 16. First buckle plate; 17. Second buckle plate; 181. Trapezoidal groove; 182. Triangular groove; 183. Arc-shaped groove; 184. Hole; 185. Air inlet; 186. Long strip comb teeth; 187. Sealing groove; 21. Guide bracket; 22. First guide wheel; 23. Second guide wheel; 24. Inclined platform; 31. Main widening wheel; 32. Secondary widening wheel; 33. Flexible outer sleeve; 34. Expansion pattern; 35. Transmission gear; 41. Upper pressure plate; 42. Base; 43. Upper comb teeth; 44. Lower comb teeth. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] This invention provides a tobacco tow spreading device, comprising a primary spreading mechanism, a guiding mechanism, a secondary spreading mechanism, and a tertiary spreading mechanism.

[0035] Please see Figures 1 to 3 The primary expansion mechanism includes a dustproof box 11 and a support rod 12 and a primary expansion component installed inside the dustproof box 11.

[0036] The lower end of the support rod 12 is hinged to the inner wall of the dustproof box 11. An assembly plate 13 is provided at the upper end of the support rod 12. A sleeve 14 is provided on the lower surface of the assembly plate 13. A through hole (not shown) corresponding to the sleeve 14 is provided inside the assembly plate 13. An arc-shaped guide plate 15 is provided on the upper surface of the assembly plate 13. A first-stage widening component is installed between the assembly plate 13 and the arc-shaped guide plate 15. The first-stage widening component includes a first buckle plate 16 and a second buckle plate 17 fixedly connected. Trapezoidal grooves 181 and triangular grooves 182 located on both sides of the trapezoidal grooves 181 are provided on the opposite end faces of the first buckle plate 16 and the two triangular grooves 182. The trapezoidal groove 181 on the first buckle plate is connected to the two triangular grooves 182, and the trapezoidal groove 181 on the second buckle plate is connected to the two triangular grooves 182. Two triangular grooves 182 are connected by arc-shaped grooves 183. After the first buckle plate 16 and the second buckle plate 17 are fastened together, the trapezoidal grooves 181 of the first buckle plate 16 and the second buckle plate 17 together form a filament channel that is narrow at the bottom and wide at the top. The triangular grooves 182 of the first buckle plate 16 and the second buckle plate 17 form two negative pressure chambers, and the negative pressure chambers are connected to negative pressure pipelines. The arc-shaped grooves 183 of the first buckle plate 16 and the second buckle plate 17 form an airflow hole that connects the filament channel and the negative pressure chambers. Positive pressure chambers (not shown in the figure) are provided in both the first buckle plate 16 and the second buckle plate 17. The holes 184 of the positive pressure chambers are connected to high-pressure pipelines. The positive pressure chambers are connected to the trapezoidal grooves 181 through downward-sloping air inlets 185. Multiple elongated comb teeth 186 are provided at the upper end of the trapezoidal grooves 181, and the multiple elongated comb teeth 186 are distributed in a fan-shaped radial pattern. Both the first buckle plate 16 and the second buckle plate 17 have sealing grooves 187 on their adjacent end faces, and sealing strips are installed in the sealing grooves.

[0037] Please see Figure 1 The guiding mechanism is located above the secondary expansion mechanism and includes a guide bracket 21, a first guide wheel 22 and a second guide wheel 23. A ramp platform 24 is provided on the guide bracket 21. A filament passage gap is provided between the first guide wheel 22 and the second guide wheel 23. The filaments drawn from the primary expansion mechanism at a high position enter the filament passage gap at a low position after passing through the ramp platform 24.

[0038] Please see Figure 4The secondary widening mechanism includes a main widening wheel 31 and a secondary widening wheel 32. The main widening wheel is externally driven by a motor. A flexible outer sleeve 33, spindle-shaped, is fixedly fitted around the outside of the main widening wheel 31. The secondary widening wheel 32 is a grooved wheel with expansion grooves 34 on its outer surface. The outer wall of the flexible outer sleeve 33 contacts the secondary widening wheel 32. Transmission gears 35 are coaxially fixed on the spindles of the main widening wheel 31 and the secondary widening wheel 32, respectively. In the synchronous, opposite-direction meshing transmission state of the two transmission gears 35, the secondary widening wheel 32 rotates in the opposite direction and with increased speed relative to the main widening wheel 31. (Please refer to...) Figure 1 In this embodiment, there are two sets of secondary widening mechanisms, and the main widening wheel 31 and the secondary widening wheel 32 in the two sets of secondary widening mechanisms are in opposite positions.

[0039] Please see Figure 6 and Figure 7 The three-stage wide-extension mechanism includes a detachably connected upper pressure plate 41 and a base 42. In this embodiment, the upper pressure plate 41 and the base 42 adopt a magnetic attraction design. The lower surface of the upper pressure plate 41 is fixedly connected to a first magnetic plate, and the upper surface of the base 42 is fixedly connected to a second magnetic plate that attracts the first magnetic plate. The lower surface of the upper pressure plate 41 is provided with a first groove for entering the filament bundle, and the top of the first groove is provided with an upper comb tooth 43. The upper surface of the base 42 is provided with a second groove for entering the filament bundle, and the second groove is provided with a lower comb tooth 44. After the upper pressure plate 41 and the base 42 are fastened together, the first groove and the second groove form a filament bundle entry hole. The upper comb tooth 43 and the lower comb tooth 44 are spatially staggered.

[0040] 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 tobacco tow widening device, characterized in that: This includes primary expansion agencies, secondary expansion agencies, and tertiary expansion agencies; The primary expansion mechanism includes a dustproof box and a support rod and a primary expansion assembly disposed within the dustproof box. The lower end of the support rod is hinged to the inner wall of the dustproof box, and an assembly plate is provided at the upper end of the support rod. A sleeve is provided on the lower surface of the assembly plate, and a through hole corresponding to the sleeve is provided inside the assembly plate. An arc-shaped guide plate is provided on the upper surface of the assembly plate. The primary expansion assembly includes a first buckle plate and a second buckle plate fixedly connected. The opposite end faces of the first buckle plate and the second buckle plate are provided with trapezoidal grooves and triangular grooves located on both sides of the trapezoidal grooves. The trapezoidal groove on the first buckle plate is connected to the two... The triangular grooves are connected to each other, and the trapezoidal groove on the second buckle is connected to the two triangular grooves by arc grooves. After the first buckle and the second buckle are fastened together, the trapezoidal grooves of the first buckle and the second buckle together form a filament channel that is narrow at the bottom and wide at the top. The triangular grooves of the first buckle and the second buckle form two negative pressure chambers. The negative pressure chambers are connected to negative pressure pipelines. The arc grooves of the first buckle and the second buckle form an airflow hole that connects the filament channel and the negative pressure chambers. Positive pressure chambers are provided in both the first buckle and the second buckle. The positive pressure chambers are connected to the trapezoidal grooves by downward-sloping air inlets.

2. The tobacco tow widening device according to claim 1, characterized in that: The upper end of the trapezoidal groove is provided with multiple elongated comb teeth, which are distributed in a fan-shaped radial pattern.

3. The tobacco tow widening device according to claim 1, characterized in that: The secondary widening mechanism includes a main widening wheel and a secondary widening wheel. The main widening wheel is externally connected to a drive motor. A flexible outer sleeve, which is spindle-shaped, is fixedly fitted onto the outside of the main widening wheel. The secondary widening wheel is a grooved wheel. The outer wall of the flexible outer sleeve is in contact with the secondary widening wheel. Transmission gears are coaxially fixed on the spindles of the main widening wheel and the secondary widening wheel, respectively. When the two transmission gears are synchronously meshing in opposite directions, the secondary widening wheel rotates in the opposite direction and with increased speed relative to the main widening wheel.

4. The tobacco tow widening device according to claim 3, characterized in that: The secondary expansion mechanism consists of two sets, with the main expansion wheel and the auxiliary expansion wheel in the two sets of secondary expansion mechanisms being in opposite positions.

5. The tobacco tow widening device according to claim 1, characterized in that: The three-stage widening mechanism includes a detachably connected upper pressure plate and a base. The lower surface of the upper pressure plate is provided with a first filament entry groove, and the top of the first filament entry groove is provided with upper comb teeth. The upper surface of the base is provided with a second filament entry groove, and the second filament entry groove is provided with lower comb teeth. After the upper pressure plate and the base are fastened together, the first filament entry groove and the second filament entry groove form a filament entry hole. The upper comb teeth and the lower comb teeth are spatially staggered.

6. The tobacco tow widening device according to claim 5, characterized in that: The lower surface of the upper pressure plate is fixedly connected to a first magnetic plate, and the upper surface of the base is fixedly connected to a second magnetic plate that is attracted to the first magnetic plate.

7. The tobacco tow widening device according to claim 5, characterized in that: The upper pressure plate and the base are detachably connected by bolts.

8. The tobacco tow widening device according to claim 1, characterized in that: It also includes a guiding mechanism, which is located above the secondary spreading mechanism. The guiding mechanism includes a guide bracket, a first guide wheel, and a second guide wheel. A ramp platform is provided on the guide bracket. A filament passing gap is provided between the first guide wheel and the second guide wheel. The filaments drawn from the primary spreading mechanism at a high position enter the filament passing gap at a low position after passing through the ramp platform.

Images