CN110679980A - A slicing device and manufacturing process for optimizing the geometry of tobacco slices - Google Patents

Abstract

The invention relates to a shaping and slicing device and a manufacturing process for optimizing the geometric shape of tobacco sheets. It is composed of slicing, shredding and other processes; the optimization of the geometry of the tobacco sheet is mainly realized by the shaping and slicing device developed in the present invention, which is mainly composed of a vibrating conveyor, a spiral screed roller, a high-speed belt, a material guide slide, a feeding roller, a shaping roller, and a discharging belt. , chassis and fixed brackets and other components. In this technical scheme, the shape of the tobacco slices is reasonably optimized and controlled, so that the size distribution of the tobacco slices conforms to the statistical probability distribution, and the uniformity and rationality of the length distribution of the shredded shreds are fundamentally improved; , the proportion of 2mm ~ 4mm cut tobacco reaches more than 80%, and the structure of cut tobacco tends to be more uniform.

Description

A slicing device and manufacturing process for optimizing the geometry of tobacco slices

technical field

The invention belongs to the technical field of tobacco processing, in particular to a shaping slicing device and a manufacturing process for optimizing the geometric shape of tobacco sheets.

Background technique

The cigarette shredding process is the process of processing tobacco slices, tobacco stems and other raw materials into shredded tobacco that meets the cigarette quality standards and cigarette rolling requirements. This process involves changes in temperature, moisture content, shape, etc. Among them, deformation, that is, cutting the tobacco sheet into cut tobacco with a suitable width is a key and necessary link, and other processes are gradually developed around this. Therefore, in the process of silk making, the structure of the shredded leaf is an important index, which not only directly affects the blending and flavoring uniformity of the later process, but also has a significant impact on the consumption and rolling quality of cigarettes. Studies have shown that the optimal length of the distribution of the leaf cut structure should be 2.00 to 4.75 mm. With the increase of the amount of cut tobacco longer than this length, the standard deviation of the single weight and the density of the tobacco will become larger, and the stability will become worse. This is due to The fluctuation of the arrangement of the longer cut tobacco during the rolling process is also greater.

The current reality is that the filament length distribution is extremely uneven and the filament rate is too high in all cigarette companies. The test data shows that the proportion of leaf silk >10mm accounts for about 40%, and the longest leaf silk can reach more than 100mm. These excessively long shredded shreds are easily entangled with each other, curled, and intertwined to form knotted or agglomerated shredded tobacco during processing, and are not easily mixed with other shredded tobacco. The uniformity and consistency of the actual blending of cut tobacco in different modules, and the operating efficiency of cigarette equipment. For consumers, there are differences in the stability and consistency of smoking quality for each cigarette. With the popularization and application of high-speed cigarette machines, especially the rapid development of special-shaped cigarettes such as thin sticks, medium sticks, and short sticks, this problem has become increasingly prominent.

In order to solve this problem, Patent No. ZL201510281355.7 proposes "a device for adjusting the uniformity of cut tobacco size", which achieves certain effects and can effectively reduce the filament rate, but it is difficult to control the distribution ratio of cut tobacco size. The non-uniformity of the size distribution ratio of the cut tobacco is mainly caused by the non-uniformity of the size of the blades. Only a reasonable geometric shape of the tobacco sheet is conducive to the optimal distribution of the size of the cut tobacco, but this problem cannot be solved in the prior art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a shaping and slicing device and a manufacturing process for optimizing the geometric shape of tobacco sheets, so as to solve the problem of uneven distribution ratio of cut tobacco sizes in the prior art.

The present invention is achieved through the following technical solutions:

A shaping and slicing device for optimizing the geometry of tobacco sheets, comprising:

The vibrating conveyor loosens the smoke flakes with the set flow;

The number of spiral screed rollers is 4-6. The structure of each spiral screed roller is the same, and they are arranged under the vibrating conveyor and rotate in the same direction; The gap between the screed rollers can be adjusted;

The high-speed belt is arranged below the spiral screeding roller, driven by a high-speed motor at a set speed, and thins the material passing through the spiral screeding roller into a flat layer;

The upper end of the guide sliding plate is arranged below the discharge end of the high-speed belt, and the lower end is arranged above the feeding roller;

The feeding roller and the shaping roller are a pair of rollers, which are driven by the same motor. The feeding roller and the shaping roller have opposite directions and have the same linear speed; a shaping blade is fixed on the outer surface of the shaping roller;

The discharging belt is located below the feeding roller, and transports the tobacco sheets cut by the shaping roller to the next process.

The vibrating conveyor, the spiral screed roller, the high-speed belt, the guide slide plate, the feeding roller, the shaping roller and the discharging belt are all arranged in the casing, and pass through a fixed bracket. support.

The spiral screed roll includes a cylindrical screed roll body, and a plurality of helical flakes are arranged on the side surface of the screed roll body, and the helical flakes are set along the circumference of the side surface of the screed roll body. The inclination angles are evenly distributed.

The helical sheets are arranged in four rows along the side surface of the screed roller body, and take the axial centerline of the screed roller body as the axis, and spiral in two-by-two opposite to each other in a figure-eight shape.

The side surface of the feeding roller is frosted.

The shaping blade is an annular structure surrounded by fence-shaped diamond blades.

A manufacturing process for optimizing the geometric shape of tobacco slices, using any of the above-mentioned shaping and slicing devices, comprising the following steps:

1) Tobacco sheet pretreatment process

The tobacco sheets are evenly fed into the loosening and moisturizing device according to the formula for heating and humidifying treatment, so that the tobacco sheets are fully loosened and the processing resistance of the tobacco sheets is improved; The formula tobacco is evenly blended to balance the moisture and temperature of the tobacco;

2) Screening and quantitative process

First, hot air warming treatment will be performed on the stored tobacco sheet in step 1) to further improve the processing resistance of the tobacco sheet and make the tobacco sheet stretch;

Secondly, the tobacco sheets after the heating treatment are subjected to multi-stage screening, the A-type tobacco sheets > 10mm enter the next process, and the B-type tobacco sheets with 3-10mm do not pass the next process, but are mixed with the smoke at the discharge end of the next process. The flakes are mixed, and the C-type flakes less than 3mm do not enter the subsequent process;

Third, control the flow rate of the A-type tobacco chips through the quantitative feeding device to keep the flow of tobacco chips stable and enter the next process;

3) Forming and slicing process

The Class A tobacco sheets conveyed in the previous process are evenly thinned into a flat layer by vibrating conveyors, spiral screed rollers, high-speed belts and guide slides, and transported to the top of the feeding roller; Squeeze and cut the A-type tobacco sheets into the required shape in the direction of rotation, and mix them with the B-type tobacco sheets at the discharge belt and send them to the next process;

4) Tobacco sheet pre-pressing and shredding process

The tobacco chips of the previous process are subjected to secondary screening treatment, the tobacco chips > 4mm are used for the shredding process by the shredder, and the 2-4mm tobacco chips bypass the shredder and are directly mixed with the shredded tobacco, <2mm The tobacco flakes do not enter the subsequent process under the sieve;

Tobacco pieces > 4mm are pre-pressed and then entered into the shredder to complete shredding, and mixed with tobacco pieces of 2-4mm to enter the subsequent process.

The subsequent steps include, but are not limited to, the leaf silk feeding process, the silk drying process, the proportion blending process or the aromatizing process.

In the shredding process, the side plate of the feeding bin of the shredding machine is a grooved structure.

The beneficial effects of the present invention are:

In the technical scheme, the shape of the tobacco slices is reasonably optimized and controlled, so that the size distribution of the tobacco slices conforms to the statistical probability distribution, and the uniformity and rationality of the length distribution of the leaf strands are fundamentally improved. Through application, the proportion of tobacco chips > 25.4mm is controlled below 15%, the proportion of tobacco chips of 12.7-25.4mm is about 85%, and the fragments of <2.36mm are controlled below 0.5%, and the structure of tobacco chips is reasonably distributed; After the treatment, the excessively long cut tobacco is basically eliminated, the proportion of 2mm-4mm cut tobacco reaches more than 80%, and the structure of the cut tobacco tends to be more uniform.

Description of drawings

Fig. 1 is the structural schematic diagram of the slicing device of the present invention to remove the casing and the support;

Fig. 2 is the side view of Fig. 1;

Figure 3 is a schematic structural diagram of a spiral screed roll;

Figure 4 is a schematic diagram of a diamond-shaped blade of a sizing roller.

Description of reference numerals

1 vibrating conveyor, 2 spiral screed rollers, 21 screed roller body, 22 spiral blades, 3 high-speed belts, 4 material guide slides, 5 feeding rollers, 6 brushes, 7 shaping rollers, 71 diamond blades, 8 discharging belts .

Detailed ways

The technical solutions of the present invention will be described in detail by the following examples. The following examples are only exemplary, and can only be used to explain and illustrate the technical solutions of the present invention, but cannot be construed as limitations on the technical solutions of the present invention.

In order to realize the uniform distribution of tobacco shreds, we analyze the rectangular, rhombus, and oval tobacco slices of a certain size from the principle. In the post process, the best way to solve this problem is to rationally optimize and control the shape of the tobacco sheet, and fundamentally improve the uniformity and rationality of the length distribution of the filaments.

The technical solution is realized by developing a shaping and slicing device that optimizes the geometry of the tobacco slices, and in the manufacturing process, the structure is improved by the pre-pressing unit before the shredding process, so as to improve the shredding quality.

The shaping and slicing device of the present application is mainly composed of a vibrating conveyor, a spiral screed roller, a high-speed belt, a guide slide plate, a feeding roller, a shaping roller, a discharging belt, a casing and a fixed bracket.

The vibrating conveyor, the spiral screed roller, the high-speed belt, the guide slide plate, the feeding roller, the shaping roller and the discharging belt are all arranged in the casing, and pass through a fixed bracket. support.

In the technical solutions and drawings of the present application, the casing and the fixing bracket are not described and illustrated, but it should be understood that the above-mentioned components all require a fixing bracket for support (including fixed support, rotational support, connection, etc.) .

As shown in Figure 1, the vibrating conveyor 1 is located obliquely above the spiral screed roll 2, and the tobacco flakes after being heated and rehydrated are loosened and then naturally scattered on the spiral screed roll. In this embodiment, by adjusting the vibrating conveyor, the tobacco flakes with a constant flow rate >10 mm can be loosened and then naturally scattered on the spiral screed roller. The specific flow rate can be set according to the output of different production lines. .

As shown in Figure 2, the number of spiral screed rollers 2 is 4-6. In this example, the number of spiral screed rollers is 4. Each spiral screed roller has the same structure and is arranged in parallel on the vibrating conveyor. below, and rotate clockwise in the same direction; the rotation speed of the spiral screed roller or the gap between two adjacent spiral screed rollers can be adjusted.

The spiral screed roll 2 includes a cylindrical screed roll body 21, and a plurality of helical flakes 22 are arranged on the side surface of the screed roll body. The set inclination angles are evenly distributed.

The helical pieces are arranged in four rows along the side surface of the screeding roller body, and take the axial centerline of the screeding roller body as the axis, and spiral to both sides in a figure-eight shape opposite to each other. The material is evenly spread to both sides and scattered on the high-speed belt.

The high-speed belt 3 is arranged below the spiral screeding roller, driven by a high-speed motor at a set speed, and thins the material passing through the spiral screeding roller into a flat layer, which is convenient for shaping and slicing in the next process. In this embodiment, the rotational speed of the high-speed motor is set as required, which is compared with other motors in the device, and the rotational speed of the driving motor used for the high-speed belt is higher than the rotational speed of other driving motors.

The upper end of the guide slide 4 is arranged below the discharge end of the high-speed belt, and the lower end is arranged above the feeding roller, so that the material thrown by the high-speed belt can be accurately and evenly conveyed to the upper part of the feeding roller.

The feeding roller 5 and the setting roller 7 are a pair of rollers, which are driven by the same motor and rotate in the opposite direction; the surface of the feeding roller is frosted, and is connected to the motor through a pulley. The main function is to feed the setting roller and provide adhesion; as shown in the figure As shown in 3, the shaping roller is a solid roller with a fence-shaped blade fixed on the surface, which can be customized into different shapes of blades (such as rectangle, square, diamond, ellipse, etc.) according to different needs; the outer circle of the shaping roller has a certain range. Circumference of the blade to ensure a reasonable range of clearance when the blade is in contact with the feeding roller; the shaping roller is connected with the feeding roller through gears, the gap between the two is small, the linear speed is the same, and the reverse rotation is performed. Tobacco flakes are cut into desired shapes.

The discharging belt 8 is located below the feeding roller, and transports the tobacco sheets cut by the shaping roller to the next process.

The brush 6 is located under the feeding roller, and is used for brushing down a small amount of tobacco flakes adhering to the roller, so as to keep the surface of the feeding roller clean.

The technical processing route of the technical scheme consists of the steps of loosening and regaining moisture of the tobacco chips, storing the tobacco chips, increasing the temperature of the tobacco chips, screening the tobacco chips, quantitative feeding, uniform spreading, shaping and slicing, and shredding. Tobacco sheet loosening and moisturizing, tobacco sheet storage, tobacco sheet heating, tobacco sheet screening, quantitative feeding, shredding and other equipment in the post-process continue to use the current general equipment in the industry, and can be equipped according to the "Cigarette Technology Specification" (2016 Edition). Type selection, process parameters are determined through experiments; the optimization of tobacco slice geometry is mainly realized by the shaping and slicing device developed in the present invention, and the pre-pressing unit of the shredder is optimized and improved to improve the application effect.

The present application also provides a manufacturing process for optimizing the geometry of tobacco sheets, using any of the above-mentioned shaping and slicing devices, comprising the following steps:

Tobacco sheet pretreatment process:

It is composed of two sections: loosening and moisture regaining and storage. The process task is to evenly send the tobacco sheets into the loosening and moisturizing device for heating and humidifying treatment according to the formula, so that the tobacco sheets are fully loosened and the processing resistance of the tobacco sheets is improved; The reciprocating method is evenly spread into the storage cabinet, so that the tobacco sheets of different formulas are evenly blended, and the moisture and temperature of the tobacco sheets are balanced. Through the optimization test, the key parameters of the loosening and moisturizing process are: hot air temperature 62±2℃, outlet moisture content 19±1%, outlet temperature 55±3℃; tobacco storage environment temperature 35±2℃, relative humidity 70±3%, The storage time is 2.5 to 16 hours; at this time, the tobacco sheet has the best resistance to processing, the fragmentation is small, the fragmentation rate is less than 0.5%, and the loose rate of the tobacco sheet is greater than or equal to 98%.

Screening and quantitative process:

It consists of three sections: tobacco sheet heating, tobacco sheet screening, and quantitative feeding. The main process task is to sort the tobacco sheets and deliver them to the next process accurately and evenly according to the set flow rate. Tobacco sheet warming is to carry out hot air warming treatment on the tobacco sheet after storage. A small amount of steam can be added as needed to further improve the processing resistance of the tobacco sheet and make the tobacco sheet stretch. After optimization, the key parameters of the tobacco sheet warming are as follows: hot air temperature 56±2°C, outlet moisture content 18.5±1%, outlet temperature 48±3°C, moisture exhaust negative pressure -10μbar, under this combination of parameters, the tobacco sheet is fully stretched, the processing resistance is further enhanced, and the stretch rate is >98% , the fragmentation rate is less than 0.5%. Tobacco flakes are sieved into three-stage vibrating screening, >10mm flakes enter the next process to shape and slice, 3-10mm flakes bypass the shaping and slicing process and are directly mixed with the sliced flakes, and <3mm flakes will not be mixed under the sieve. . The quantitative feeding is composed of a quantitative pipe and a belt scale, and the conveying flow of the tobacco sheet is controlled to be stable. In this embodiment, the material flow is set to 4500kg/h. Coefficient of variation < 0.25%.

Shaped slicing process

It consists of two sections: uniform spreading and shaping and slicing. The main technological task is to process the tobacco into the required geometric shape. In the uniform spreading process, the tobacco chips with a thickness of >10mm are evenly thinned into a flat layer through vibrating conveyors, spiral screed rollers, high-speed belts, and guide slides, and then transported to the top of the feeding roller; The reverse high-speed rotation of the roller squeezes and cuts the blade into the required shape, and mixes it with 3-10mm tobacco flakes at the discharge belt and sends it to the shredding section.

Tobacco sheet pre-pressing and shredding process:

It is composed of secondary screening, tobacco pre-pressing and shredding sections. The main technological task is to compact the tobacco sheet, avoid running the sheet during the shredding process, and accurately cut the tobacco sheet into a certain wide-band cut tobacco according to the process requirements. Secondary screening is vibrating screening before shredding, which is to carry out secondary screening treatment on the tobacco chips with optimized geometric shape to avoid increasing crushing and improve the quality of shredding; the screening is also divided into three levels, >4mm tobacco The slices enter the shredder for shredding treatment. The 2-4mm tobacco chips bypass the shredder and are directly mixed with the shredded tobacco, and the tobacco chips <2mm are not processed under the sieve. The pre-pressing unit of the shredder machine has been optimized and improved as follows: the side plate of the shredder feed bin is changed from a flat type to a groove type (the depth of the groove is 2mm, the width is 3mm, and the spacing is 3mm). Variable line contact avoids the rolling of the tobacco sheets due to friction during the transportation of the shredding machine after optimization and shaping, which affects the length distribution of the shredded shreds. At the same time, the parameters of the feeding system of the shredding machine are optimized as follows: the speed of the feeding trough is 500 strokes/min, the pressure of the knife gate is 28KN, and the speed of the cutter head is 450 r/min, so as to stabilize the height of the knife gate and effectively improve the cutting effect and the uniformity of the length distribution of the cut tobacco. The shredding width is determined according to the characteristics of the brand. In this example, the conventional cigarette is set to be 1.0±0.1 mm, and the thin cigarette is set to be 0.8±0.1 mm.

Subsequent processing such as shredding, leaf shredding, drying, proportion blending, and flavoring are no longer involved in this technical solution, and the current industry general equipment and parameters are continued.

In the technical scheme, the shape of the tobacco slices is reasonably optimized and controlled, so that the size distribution of the tobacco slices conforms to the statistical probability distribution, and the uniformity and rationality of the length distribution of the leaf strands are fundamentally improved. Through application, the proportion of tobacco chips > 25.4mm is controlled below 15%, the proportion of tobacco chips of 12.7-25.4mm is about 85%, and the fragments of <2.36mm are controlled below 0.5%, and the structure of tobacco chips is reasonably distributed; After the treatment, the excessively long cut tobacco is basically eliminated, the proportion of 2mm-4mm cut tobacco reaches more than 80%, and the structure of the cut tobacco tends to be more uniform.

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

Claims (9)

1. a slicing device for optimizing the geometry of tobacco slices, is characterized in that, comprising: The vibrating conveyor loosens the smoke flakes with the set flow; The number of spiral screed rollers is 4-6. The structure of each spiral screed roller is the same, and they are arranged under the vibrating conveyor and rotate in the same direction; The gap between the screed rollers can be adjusted; The high-speed belt is arranged below the spiral screeding roller, driven by a high-speed motor at a set speed, and thins the material passing through the spiral screeding roller into a flat layer; The upper end of the guide sliding plate is arranged below the discharge end of the high-speed belt, and the lower end is arranged above the feeding roller; The feeding roller and the shaping roller are a pair of rollers, which are driven by the same motor. The feeding roller and the shaping roller have opposite directions and have the same linear speed; a shaping blade is fixed on the outer surface of the shaping roller; The discharging belt is located below the feeding roller, and transports the tobacco sheets cut by the shaping roller to the next process. 2. The shaping and slicing device for optimizing the geometry of tobacco sheets according to claim 1, wherein the vibrating conveyor, the spiral screed roller, the high-speed belt, the material guide slide, the feeding The roller, the shaping roller and the discharging belt are all arranged in the casing and supported by a fixed bracket. 3 . The shaping and slicing device for optimizing the geometry of tobacco sheets according to claim 1 , wherein the helical screed roll comprises a cylindrical screed roll body, and a side surface of the screed roll body is provided with a slicing device. 4 . A plurality of helical flakes, the helical flakes are evenly arranged along the circumference of the side surface of the screed roller body according to a set inclination angle. 4 . The shaping and slicing device for optimizing the geometry of tobacco sheets according to claim 3 , wherein the helical sheets are provided with four rows along the side surface of the screed roll body, and the axis of the screed roll body is arranged with the axis of the screed roll body. 5 . To the midline is the axis, and the pairs are opposite to each other in a figure-eight shape and spiral to both sides. 5 . The shaping and slicing device for optimizing the geometric shape of tobacco sheets according to claim 1 , wherein the side surface of the feeding roller is frosted. 6 . 6 . The shaping and slicing device for optimizing the geometric shape of tobacco sheets according to claim 1 , wherein the shaping blade is an annular structure surrounded by fence-shaped diamond blades. 7 . 7. A manufacturing process of optimizing the geometric shape of the tobacco sheet, using the shaping and slicing device of any one of the above claims 1 to 6, is characterized in that, comprises the following steps: 1) Tobacco sheet pretreatment process The tobacco sheets are evenly fed into the loosening and moisturizing device according to the formula for heating and humidifying treatment, so that the tobacco sheets are fully loosened and the processing resistance of the tobacco sheets is improved; The formula tobacco is evenly blended to balance the moisture and temperature of the tobacco; 2) Screening and quantitative process First, the tobacco sheet stored in step 1) is subjected to hot air warming treatment to further improve the processing resistance of the tobacco sheet, so that the tobacco sheet is stretched; Secondly, the tobacco sheets after the heating treatment are subjected to multi-stage screening, the A-type tobacco sheets > 10 mm enter step 3), and the B-type tobacco sheets of 3-10 mm do not pass through step 3), but are different from the smoke at the discharge end of step 3) The flakes are mixed, and the C-type flakes less than 3mm do not enter the subsequent process; Thirdly, the A-type tobacco sheet is controlled by the quantitative feeding device to keep the conveying flow of the tobacco sheet stable and enter step 3); 3) Forming and slicing process Step 2) The conveyed A-type tobacco sheets are evenly diluted into a flat layer by the vibrating conveyor, the spiral screed roller, the high-speed belt and the material guide slide plate, and then transported to the top of the feeding roller; Squeeze and cut the A-type tobacco sheets into the required shape in the direction of rotation, and mix them with the B-type tobacco sheets at the discharge belt and send them to step 4); 4) Tobacco sheet pre-pressing and shredding process The tobacco chips in step 3) are subjected to secondary screening treatment, the tobacco chips > 4 mm are used for the shredding process by the shredder, the tobacco chips of 2-4 mm bypass the shredder and are directly mixed with the shredded tobacco, and the tobacco chips < 2 mm The tobacco flakes do not enter the subsequent process under the sieve; Tobacco pieces > 4mm are pre-pressed and then entered into the shredder to complete shredding, and mixed with tobacco pieces of 2-4mm to enter the subsequent process. 8 . The manufacturing process for optimizing the geometry of tobacco sheets according to claim 7 , wherein the subsequent steps include but are not limited to leaf silk feeding process, silk drying process, proportion blending process or flavoring process. 9 . 9 . The manufacturing process for optimizing the geometry of tobacco sheets according to claim 7 , wherein, in the shredding process, the side plate of the feed bin of the shredder is of a grooved structure. 10 .

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