A twill groove corrugated belt forming device and forming method

Abstract

The present invention provides a twill groove corrugated belt forming device, which device comprises a first sizing mechanism, a groove forming mechanism and a second sizing mechanism connected in sequence; the first sizing mechanism comprises a first sizing device and a first control module for regulating the first sizing device; the groove forming mechanism comprises a pair of corrugating rollers, and strip-shaped bumps for forming twill grooves are arranged at intervals on the surfaces of the corrugating rollers; the second sizing mechanism comprises a second spray sizing device and a second control module for regulating the second spray device. In the first sizing mechanism, triacetin fully penetrates into the inside of the tow belt, facilitating the subsequent formation of corrugated grooves; in the second sizing mechanism, triacetin is mainly attached to the surface of the corrugated belt to achieve the curing of the corrugated grooves, thereby improving the hardness of the filter rod made of the corrugated belt.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette filter rods, and more particularly to a twill groove corrugated belt forming device and a forming method thereof. Background Art

[0002] During the cigarette smoking process, cigarette filter rods mainly play the function of selectively adsorbing some flue gas components, which is an important way to reduce the tar and harm of cigarettes. With the continuous upgrading of consumption, the function of filter rods has also changed from a simple filtering function to an improvement in the comprehensive consumer experience of the five senses of vision, taste, smell, touch, and hearing as the main functions. There have emerged various new types of filter rods such as corrugated filter rods, colored tow filter rods, polylactic acid filter rods, gel perfume lines filter rods, pop beads filter rods, binary composite particle filter rods, and ternary cavity filter rods, greatly enhancing the interest and diversification during the cigarette smoking process, and continuously improving the consumption experience of cigarette smoking from the stimulation of the five senses of consumers.

[0003] In the prior art, corrugated groove filter rods can change the flue gas form by using the shape, which can play the role of enriching the visual and tactile experiences and reducing the flue gas temperature. Corrugated groove filter rods refer to filter rods with a large number of grooves along the axial direction formed on the outer periphery of the core material, and the grooves can play the role of reducing the flue gas temperature. Corrugated groove filter rods are composed of a relatively solid core rod and a twill groove corrugated belt arranged on the outer periphery of the core rod. In the production process of the twill groove corrugated belt, it generally needs to go through a gluing process. For example, the patent document with the patent application number CN201010595742.5 discloses a production process of a tea powder composite filter rod. This production process mainly includes two processes: the production of corrugated paper with mesh grooves and the production of a composite filter rod with seamless bonding of forming paper and tow. The method for producing corrugated paper is as follows: unwind the reel paper and introduce it into the coating device, coat a coating on the surface of the paper tape, then dry the coating, and then introduce the reel paper into the corrugating machine to form corrugated grooves. Finally, wind up and cut the reel paper with corrugated grooves into shape. In the above production process, the coating amount and coating effect of the coating device directly affect the structural properties of the corrugated paper. Taking triacetin as an example, within a certain application range, the more the application amount of triacetin, the greater the hardness of the filter rod. However, when the critical value is exceeded, excessive application of triacetin will cause the hardness of the filter rod to decrease instead of increase, mainly because excessive application of triacetin will cause the tow to melt excessively. Since the existing process uses a single application process and the application temperature of triacetin is fixed, it is difficult to ensure the uniform hardness of the corrugated paper. Seriously, there are often phenomena such as melting holes and melting cavities. During the use of the filter rod, the melting holes and melting cavities will undergo crosslinking, softening and other phenomena under the influence of high-temperature flue gas, further reducing the hardness of the filter rod. Especially in the last few puffs during smoking, it is easy to generate a thermal collapse phenomenon due to the shortening of the distance between the burning cone and the filter rod and the increase in flue gas, resulting in a decrease in the hardness of the filter rod and a decline in the tactile experience of consumers. Summary of the Invention

[0004] The present invention provides a twill groove corrugated belt forming device and a twill groove corrugated belt forming method to solve the problems in the prior art that the hardness of corrugated filter rods is not high, thermal collapse is likely to occur, and the tactile experience of consumers is affected.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A twill groove corrugated belt forming device includes a first sizing mechanism, a groove forming mechanism, and a second sizing mechanism connected in sequence; the first sizing mechanism includes a first sizing mechanism and a first control module for regulating the sizing amount and sizing temperature of the first sizing mechanism; the groove forming mechanism includes a pair of corrugating rollers, and strip-shaped protrusions obliquely arranged relative to the roller shaft of the corrugating roller are arranged at intervals on the surface of the corrugating roller; the second sizing mechanism includes a second spray sizing device and a second control module for regulating the sizing amount and sizing temperature of the second spray device.

[0007] The twill groove corrugated belt forming device provided by the present invention includes two sizing mechanisms. Among them, the first sizing mechanism is used to apply glue to the tow belt before the corrugated groove is formed and perform preliminary curing treatment on the tow belt. After undergoing the preliminary curing treatment, the tow belt is more likely to be formed in the groove forming mechanism. Subsequently, the tow belt with grooves is introduced into the second sizing mechanism for secondary sizing treatment, so that the formed grooves are further cured and shaped, thereby improving the hardness of the corrugated belt. And through two sizing treatments, triacetin can be applied more evenly, avoiding the problem of inconsistent hardness of corrugated paper caused by single sizing. In addition, the corrugating roller of the present invention forms twill grooves on the tow belt. Since the corrugated groove filter rod is usually connected end to end with a common filter rod to form a binary composite filter rod, the length of the corrugated groove filter rod is limited, usually only half of the total length of the filter rod. And the effect of the groove on reducing the flue gas temperature is related to the distance that the flue gas passes through. Therefore, the present invention sets the corrugated groove as a twill groove. Compared with a straight groove, the twill groove has a longer flue gas flow path in the corrugated filter rod of the same length, and can improve the effect of reducing the flue gas temperature.

[0008] Further, the first sizing mechanism includes two relatively arranged high-temperature sizing spray heads, and a first sizing area is formed between the two high-temperature sizing spray heads; the second sizing mechanism includes two relatively arranged low-temperature sizing spray heads, and a second sizing area is formed between the two low-temperature sizing spray heads. In this application, the first sizing mechanism and the second sizing mechanism can also be set to different sizing temperatures. The first sizing mechanism can be set to a relatively high sizing temperature to promote the penetration of glycerol triacetate into the tow tape, making the combination of glycerol triacetate and the tow tape more uniform and sufficient, so as to facilitate the subsequent formation of corrugated grooves; the second sizing mechanism can be set to a relatively low sizing temperature to shape the grooves of the corrugated tape with glycerol triacetate, while avoiding the softening and melting of the corrugated tape caused by excessive temperature.

[0009] Further, a turning mechanism is also arranged between the first sizing mechanism and the groove forming mechanism. The turning mechanism can turn over the tow tape from the first sizing mechanism, so that the surfaces of the tow tape for the two times of sizing face differently, avoiding uneven sizing on the upper and lower surfaces of the tow tape.

[0010] Further, the turning mechanism includes two tow guide rollers with opposite axes.

[0011] Further, a first spray recovery box is arranged below the first sizing area, and a first baffle is arranged on the side of the first sizing area; a second spray recovery box is arranged below the second sizing area, and a second baffle is arranged on the side of the second sizing area.

[0012] The present invention also provides a method for forming a twill groove corrugated tape based on the above-mentioned twill groove corrugated tape forming device, and the method includes the following steps:

[0013] S1. Import the tow tape into the first sizing mechanism, and size the tow tape through the first sizing mechanism to obtain a first sized tape;

[0014] S2. Import the first sized tape into the turning mechanism, and the first sized tape is turned over between the two tow guide rollers of the turning mechanism;

[0015] S3. Import the turned-over first sized tape into the groove forming mechanism, and use the corrugating roller to form twill grooves on the first sized tape to obtain a rough twill groove corrugated tape;

[0016] S4. Import the rough twill groove corrugated tape into the second sizing mechanism, and size the tow material through the second sizing mechanism to obtain the finished twill groove corrugated tape.

[0017] Further, the sizing amount and sizing temperature of the second sizing mechanism are lower than those of the first sizing mechanism.

[0018] Further, the sizing temperature of the first sizing mechanism is 40°C, and the sizing temperature of the second sizing mechanism is 30°C.

[0019] Further, the sizing amount of the first sizing mechanism is 7% - 9%, and the sizing amount of the second sizing mechanism is 3% - 5%.

[0020] In summary, the following beneficial effects can be achieved by applying the technical solution of the present invention:

[0021] 1. The twill groove corrugated belt forming device provided by the present invention is provided with a first sizing mechanism and a second sizing mechanism. The first sizing mechanism is used to integrally infiltrate the triacetin and the tow belt, preliminarily cure the tow belt, and facilitate the subsequent formation of the corrugated groove. After the corrugated groove is formed, the second sizing mechanism further attaches the triacetin to the surface of the corrugated belt, further curing the shape and structure of the corrugated belt, thereby improving the structural strength of the corrugated belt, and further enabling the corrugated filter rod produced using this corrugated belt to have higher hardness and use comfort.

[0022] 2. In the twill groove corrugated belt forming device provided by the present invention, the surface of the corrugating roll has strip-shaped convex blocks obliquely arranged relative to the roll shaft. After the strip-shaped convex blocks act on the tow belt, twill grooves can be formed. Compared with straight grooves, the twill grooves have a longer flue gas flow path under the same length of the corrugated filter rod. Therefore, the product has a better effect of reducing the flue gas temperature.

[0023] 3. In some embodiments of the present invention, the first sizing mechanism and the second sizing mechanism of the twill groove corrugated belt forming device can be provided with upper and lower sizing spray heads to improve the sizing uniformity. Further, a flipping mechanism can be provided to make the surface of the tow belt face different directions during the two sizings, further improving the sizing uniformity.

[0024] 4. In some embodiments of the present invention, a baffle and a spray recovery box can also be provided in the first sizing mechanism and the second sizing mechanism of the twill groove corrugated belt forming device. The baffle can limit the action range of the spray, and the spray recovery box can recover the falling glue mist.

[0025] 5. The twill groove corrugated belt forming method provided by the present invention makes the corrugated belt have higher hardness through two-step sizing. Further, during the processing, the sizing amount and sizing temperature set by the first sizing mechanism are relatively high, enabling the tow belt to fully infiltrate with the triacetin in the first sizing mechanism, making the combination of the tow belt and the triacetin more uniform; the sizing amount and sizing temperature set by the second sizing mechanism are relatively low, avoiding the secondary softening and deformation of the corrugated belt caused by too high sizing temperature, thereby ensuring the structural strength of the corrugated belt and also avoiding the excessive addition of triacetin. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the prior art or embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 It is a schematic structural diagram of the twill groove corrugated belt forming device in Embodiment 1;

[0028] Figure 2 It is a schematic structural diagram of the corrugated groove filter rod forming device in Embodiment 2;

[0029] In the figure, 100 - the first sizing mechanism; 101 - the tow tape inlet; 102, the glue - throwing disc; 103 - the high - temperature sizing spray head; 104 - the first baffle; 105 - the glue - throwing disc controller; 106 - the high - temperature sizing controller; 107 - the triacetin tank; 108 - the first spray recovery box; 109 - the tow tape outlet; 200 - the flipping mechanism; 300 - the groove forming mechanism; 301 - the formed corrugated belt; 302 - the formed groove; 400 - the second sizing mechanism; 401 - the corrugated belt inlet; 402 - the glue - throwing disc; 403 - the low - temperature sizing spray head; 404 - the second baffle; 405 - the glue - throwing disc controller; 406, the low - temperature sizing controller; 407, the triacetin tank; 408 - the second spray recovery box; 409 - the corrugated belt outlet; 500 - the core tow box; 501 - the tow guide port; 502 - the first air loosening; 503 - the right - angle guide rail; 504 - the steering guide rail; 505 - the second air loosening; 506 - the pre - tensioning roller; 507 - the wire feeding roller; 508 - the loosening roller; 509 - the main air loosening; 510 - the sizing box; 511 - the output roller; 600 - the corrugated belt tow box; 601 - the tow guide port; 602 - the first air loosening; 603 - the steering guide rail; 604 - the second air loosening; 605 - the pre - tensioning roller; 606 - the wire feeding roller; 607 - the loosening roller; 608 - the secondary pre - tensioning roller; 609 - the corrugated belt output roller; 700 - the composite forming machine; 701 - the composite forming roller; 702 - the forming paper. Detailed Embodiments

[0030] The following further describes the present invention in conjunction with the specification drawings and specific embodiments. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. In addition, the embodiments of the present invention involved in the following description are usually only a part of the embodiments of the present invention, rather than all of the embodiments. Therefore, all other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention should fall within the scope of protection of the present invention.

[0031] Example 1

[0032] As Figure 1 shown, the present invention provides a twill groove corrugated belt forming device, which is composed of a first sizing mechanism 100, a turning mechanism 200, a groove forming mechanism 300 and a second sizing mechanism connected in sequence.

[0033] The first sizing mechanism 100 includes a tow belt inlet 101, a tow belt outlet 109 and a first sizing mechanism. The first sizing mechanism includes a glue throwing disc 102, a high-temperature sizing spray head 103, a first baffle 104, a glue throwing disc controller 105, a high-temperature sizing controller 106, a triacetin tank 107 and a first spray recovery box 108. Among them, there are two high-temperature sizing spray heads, and a first sizing area is formed between the two high-temperature sizing spray heads. The first baffle is arranged on both sides of the first sizing area to prevent glue mist from splashing. The first spray recovery box is arranged below the first sizing area to recover the unadhered glue mist. The glue throwing disc makes triacetin spray out through the high-temperature sizing spray head by centrifugal force and acts on the tow belt passing through the first sizing area. In this embodiment, the sizing temperature of the high-temperature sizing spray head is 40°C, and the sizing amount is 7% - 9%.

[0034] The turning mechanism 200 is composed of two tow guide rollers. Between the two tow guide rollers, the tow belt is turned over so that the surfaces of the two times of sizing face different directions, improving the sizing uniformity.

[0035] The groove forming mechanism 300 is composed of a pair of corrugating rollers. The corrugating rollers are of gear-like structure, and a plurality of strip-shaped protrusions are arranged on the surface. The direction of the strip-shaped protrusions is not parallel to the axis of the corrugating rollers, so that the corrugated grooves formed on the tow belt are twill grooves. As Figure 1 shown, the tow belt forms a corrugated belt after being processed by the corrugating rollers, and regular arranged forming grooves are formed on the surface of the corrugated belt.

[0036] The second sizing mechanism 400 includes a corrugated belt inlet 401, a corrugated belt outlet 409 and a second sizing mechanism. The second sizing mechanism includes a glue throwing disc 402, a low-temperature sizing spray head 403, a second baffle 404, a glue throwing disc controller 405, a low-temperature sizing controller 406, a triacetin tank 407 and a second spray recovery box 408. The structure and working principle of the second sizing mechanism are basically the same as those of the first sizing structure, except for the process parameters. In this embodiment, the sizing temperature of the low-temperature sizing spray head is 30°C, and the sizing amount is 3% - 5%.

[0037] The overall process flow for forming the twill groove corrugated tape is as follows: The tow tape first enters the first sizing mechanism through the tow tape inlet 101, and undergoes the first sizing treatment between two high-temperature sizing spray heads. The sizing temperature is 40°C, and the sizing amount is 7% - 9%. Subsequently, it is discharged through the tow tape outlet 109, reaches the flipping mechanism 200, is flipped by two tow guide rollers, and then is introduced into the groove forming mechanism 300. A large number of grooves are formed using the bumps on the surface of the corrugating roll to obtain the rough corrugated tape. The rough corrugated tape is introduced into the second sizing mechanism 400 through the corrugated tape inlet 401, undergoes the second sizing treatment between two low-temperature sizing spray heads. The sizing temperature is 30°C, and the sizing amount is 3% - 5%. Finally, it is discharged from the corrugated tape outlet 409 to obtain the twill groove corrugated tape.

[0038] Example 2

[0039] This embodiment provides a corrugated groove filter rod forming device, which includes a mandrel processing device, a corrugated tape processing device, and a composite forming machine.

[0040] The working principle of the mandrel forming device is as follows:

[0041] After the tow passes through the tow guide port 501 from the core material tow box 500, it undergoes the first air loosening 502, and then part of the tow curl is eliminated via the right-angle guide rail 503 and the steering guide rail 504. The tow curl is further eliminated through the second air loosening. The loosened tow tape passes through the pre-tensioning roller 506, the wire feeding roller 507, and the loosening roller 508 to ensure the flatness of the tow surface and reduce the curl difference. After passing through the main air loosening 509, it passes through the sizing box 510 to fully apply triacetin to increase the hardness, and then is output by the output roller 511 to the composite forming machine 700 as the core material raw material.

[0042] The working principle of the corrugated tape forming device is as follows:

[0043] After the tow passes through the tow guide port 601 from the corrugated tape tow box 600, it undergoes the first air loosening 602, and then part of the tow curl is eliminated via 603 and the steering guide rail. The tow curl is further eliminated through the second air loosening 604. The loosened tow tape passes through the pre-tensioning roller 605, the wire feeding roller 606, the loosening roller 607 and the secondary pre-tensioning roller to ensure the flatness of the tow surface and reduce the curl difference. Subsequently, it is introduced into the twill groove corrugated tape forming device. The structure and working principle of the twill groove corrugated tape forming device are as shown in Example 1. After being processed by the first sizing mechanism 100, the flipping mechanism 200, the groove forming mechanism 300, and the second sizing mechanism, the formed corrugated tape is output by the corrugated tape output roller 609 to the composite forming machine 700 as the outer layer raw material.

[0044] The composite forming machine combines the core material and the outer layer material under the action of the composite forming roller 701 to form a grooved corrugated filter rod with a solid interior and grooved corrugations on the exterior. Subsequently, the filter rod is wrapped with forming paper 702.

[0045] Hardness tests were conducted on conventional straight-grooved corrugated filter rods with conventional single sizing and on the heat-treated sizing of the inclined-grooved network filter rods of the present invention. The test method was the point pressure method. After applying a probe with a certain area and a certain pressure to the filter rod for a certain period of time, the percentage of the length a in the diameter direction at that point to the original diameter d0 indicates the hardness of the filter rod. The larger the percentage, the greater the hardness. The calculation formula is: H = (d0 - a) / d0 × 100%.

[0046] The hardness of the filter rod was measured using a filter rod hardness tester. The main parameters of the measuring instrument were: the diameter of the measuring head was 12 mm ± 0.01 mm, the applied load was 2.94 N ± 0.01 N, the compression time was 15 s ± 1 s, and the compression speed was 0.55 mm / s ± 0.05 mm / s. For each filter rod, three points were measured and the average value was taken. The measurement results were expressed as a percentage of length, accurate to 0.1%. The measurement results of the filter rod hardness (dimension: %) are shown in the following table. It can be seen that the hardness of the filter rod (corrugated section) in this example is significantly higher than that of the comparative example.

[0047]

[0048] The inclined corrugated belt of the present invention can be input into the composite forming machine together with the filter element tow formed by conventional tow and wrapped with high-permeability forming paper to form a highly hard ventilated inclined-grooved filter rod. The heat-treated secondary sizing process of the present invention can improve the application efficiency of triacetin in the filter rod, increase the hardness of the filter rod. At the same time, the inclined-grooved corrugated filter rod can be combined with a conventional filter rod to form a binary filter rod. Wrapped with transparent tipping paper, the visualization of the inclined grooves and the smoke can be achieved. At the same time, since the smoke passage of the inclined-grooved corrugated filter rod is longer than that of the conventional binary composite straight-grooved corrugated filter rod, the smoke temperature can be reduced and the cigarette smoking experience can be improved.

Claims

1. A twill groove corrugated belt forming device, characterized in that: It includes a first sizing mechanism, a groove forming mechanism, and a second sizing mechanism connected in sequence; the first sizing mechanism includes a first spraying device and a first control module for regulating the sizing amount and sizing temperature of the first sizing mechanism; the groove forming mechanism includes a pair of corrugated rollers, and strip-shaped bumps are arranged at intervals on the surface of the corrugated rollers and are obliquely arranged relative to the roller shaft of the corrugated rollers; the second sizing mechanism includes a second spraying device and a second control module for regulating the sizing amount and sizing temperature of the second spraying device; the first spraying device includes two relatively arranged high-temperature sizing spray heads, and a first sizing area is formed between the two high-temperature sizing spray heads; the second sizing mechanism includes two relatively arranged low-temperature sizing spray heads, and a second sizing area is formed between the two low-temperature sizing spray heads.

2. The grooved corrugated belt forming device according to claim 1, characterized in that: A turning mechanism is further arranged between the first sizing mechanism and the groove forming mechanism.

3. The forming device for a twill groove corrugated belt according to claim 2, characterized in that: The turning mechanism includes two tow guide rollers with opposite axles.

4. The forming device for a twill groove corrugated belt according to claim 1, characterized in that: A first spray recovery box is arranged below the first sizing area, and a first baffle is arranged on the side of the first sizing area; a second spray recovery box is arranged below the second sizing area, and a second baffle is arranged on the side of the second sizing area.

5. A method for forming a twill groove corrugated belt, characterized in that, It includes the following steps: S1. Introduce the tow tape into the first sizing mechanism, and size the tow tape through the first sizing mechanism to obtain a first sized tape; the sizing temperature of the first sizing mechanism is 38 - 42 °C. S2. Introduce the first sized tape into the turning mechanism, and turn over the first sized tape between the two tow guide rollers of the turning mechanism. S3. Introduce the turned-over first sized tape into the groove forming mechanism, and use the corrugated rollers to form diagonal grooves on the first sized tape to obtain a rough diagonal groove corrugated tape. S4. Introduce the rough diagonal groove corrugated tape into the second sizing mechanism, and size the tow raw material through the first sizing mechanism to obtain a finished diagonal groove corrugated tape; the sizing temperature of the second sizing mechanism is 28 - 32 °C.

6. A method for forming a twill groove corrugated belt according to claim 5, characterized in that: The sizing amount and sizing temperature of the second sizing mechanism are lower than those of the first sizing mechanism.

7. A method for forming a twill groove corrugated belt according to claim 5, characterized in that: The sizing amount of the first sizing mechanism is 7% - 9%, and the sizing amount of the second sizing mechanism is 3% - 5%.

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