Cutter device for reducing filter tip burr rate

Abstract

The utility model discloses a cutter device for reducing the burr rate of a filter tip, which comprises a cutter, cleaning mechanisms and an air blowing mechanism, the cleaning mechanisms are arranged on the two sides of the cutter, are partially overlapped with the cutter and are used for scraping scale deposited on the cutter; the blowing mechanism is arranged on the outer side of the cutter, and a blowing opening of the blowing mechanism faces the edge of the overlapped part of the cleaning mechanism and the cutter and is used for cooling the cutter and cleaning scraped dirt. According to the cutter device, the problem of high hair mouth defect of the hollow filter tip is effectively solved, the quality stability of cigarettes is ensured, and the service life of the scraper is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hollow filter rod production, in particular to a cutter device for reducing filter tip burr rate, in particular to a cutter device for final cutting of double-length filter tip cigarettes to produce finished cigarettes. Background Art

[0002] like Figure 6 As shown, the double-length cigarettes produced by the SE part of the cigarette making machine are grabbed by the spider hand and brought to the MAX cigarette inlet drum wheel, and cut into two single-length cigarettes by the first slitting circular knife. After being separated by a certain distance by the separation drum, a double-length filter is inserted between the two single-length cigarettes, and wrapped with latex-coated kraft paper, and twisted into double-length filter cigarettes. The double-length filter cigarettes are cut by the second slitting circular knife to form two single-length filter cigarettes, i.e. the final finished cigarettes. When producing thin hollow filter cigarettes, it is found that the hollow filter cigarettes have burrs, such as Figure 7 As shown in the figure, the filter burr defect is caused during the cutting process of the second slitting circular knife. The filter burr defect seriously affects the consumer's product experience and the product quality is flawed, which will not only shorten the brand life cycle and be abandoned by consumers, but also cause consumers to distrust the manufacturer and damage the company's reputation.

[0003] Therefore, it is urgent to solve the problem of high quality defect rate of hollow mouth thin cigarettes. Utility Model Content

[0004] In view of the above problems, the utility model provides a cutter device for reducing the burr rate of filter tips, which can effectively improve the problem of high burr defects in hollow filters and improve the quality stability of cigarettes.

[0005] Specifically, the utility model provides a cutting device for reducing the filter tip burr rate, comprising:

[0006] Cutter;

[0007] The cleaning mechanism is arranged on both sides of the cutter, partially overlaps with the cutter, and is used to scrape off the dirt on the cutter;

[0008] The air blowing mechanism is arranged outside the cutter, with its air blowing port facing the edge of the overlapping part of the cleaning mechanism and the cutter, and is used for cooling the cutter and cleaning the scraped dirt.

[0009] Furthermore, the cleaning mechanism comprises: scrapers arranged on both sides of the cutter, the scrapers partially overlap with the cutter, a cutting edge is arranged at the overlapping portion, and the cutting edge is opposite to the rotation direction of the cutter.

[0010] Furthermore, the scraper is mounted on a frame below the cutter via a mounting shaft, and a nut for fixing the scraper is provided on the mounting shaft.

[0011] Furthermore, the distance between the scraper and the cutter is 0.2 mm, and the length of the overlapping portion is 10 mm.

[0012] Furthermore, the hair dryer mechanism comprises:

[0013] air pump;

[0014] The blowing pipe is connected to the air pump through an air supply pipeline; the blowing port of the blowing pipe faces the edge of the overlapping part of the cleaning mechanism and the cutter.

[0015] Furthermore, the hair dryer mechanism further comprises:

[0016] A pressure gauge, arranged on the gas supply pipeline;

[0017] A flow regulating valve is arranged on the air supply pipeline and is used to adjust the outlet air pressure of the blowing pipe;

[0018] A pressure relief pipeline is connected to the air supply pipeline and is located between the pressure gauge and the flow regulating valve, and the pressure relief pipeline is connected in parallel with the air blowing pipe;

[0019] Furthermore, the cutting blade has an angle of 14-20°.

[0020] Furthermore, the cutter is made of tungsten-cobalt-titanium cemented carbide YT15.

[0021] Working principle:

[0022] When burrs appear on the filter tip of a cigarette, the problem is usually fixed by replacing the cutter or cleaning the deposits. During sampling, it was found that when the cutter is blunt or deposited, the overall cutting stress of the cutter (cutting stress refers to the stress on the unit area of ​​the object when the force applied is used to cut and deform the object) decreases. The number of burrs on the filter tip of the cigarette in the sample taken from the smoke outlet is much higher than when the cutter has just been replaced. The decrease in cutting stress is the main cause of burrs on the filter tip of the cigarette. There are two main factors that affect cutting stress: (1) the toughness of the material being cut; and (2) the sharpness of the cutting material. For the cutting material, the cutting effect is mainly determined by the material of the cutting material, the blade angle, the degree of heat generation, and the amount of deposits.

[0023] To solve the problem of the original cutter being soft, we replaced it with a cutter made of tungsten-cobalt-titanium carbide YT15 to ensure better cutting effect.

[0024] Regarding the blade angle: When using cemented carbide, its blade angle cannot be polished. The smaller the blade angle, the sharper the blade, the smaller the cutting resistance, and the higher the sharpness. It is an important factor affecting sharpness. The blade angle of 14-20° is the smallest blade angle. If the blade angle is too small, the retention is poor and it is easy to be damaged.

[0025] Regarding the heating problem: the cut filter undergoes elastic and plastic deformation under the action of the cutter, which consumes work. Part of the kinetic energy of the cutter is converted into heat energy, which is an important source of cutting heat. The harder the filter, the more work is required for deformation and the more heat is generated. In addition, the friction between the cut surface of the filter and the two blades of the cutter also consumes work and generates a lot of heat. Therefore, the main source of the cutter's heating is the work of filter deformation and the work done by the friction between the filter surface and the blade. During the entire cutting process, the heat dissipation conditions are poor, resulting in heat accumulation and heating of the cutter.

[0026] The most direct impact of the cutter heating is that it will increase the wear of the cutter and reduce the life of the cutter. In addition, the heating of the cutter will melt the latex on the tipping paper and increase the degree of fouling on the cutter. Therefore, the air cooling method is used to cool the blade.

[0027] To solve the problem of cutter scale accumulation: add a set of scrapers on both sides of the cutter, use the scrapers to scrape off the glue scale, dust and other dirt on the cutter, and the blow pipe cools the cutter while the scraped dirt is finally removed by wind.

[0028] Compared with the prior art, the utility model has the following beneficial effects:

[0029] (1) The cutter device provided by the utility model effectively improves the problem of high burr defects of hollow filter tips, ensures the stability of cigarette quality, and prolongs the service life of the scraper.

[0030] (2) The blow pipe can cool the cutter and remove the dirt scraped off by the scraper at the same time, effectively ensuring the cleanliness of the cutter and scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the structure of the cutter device for reducing the filter tip burr rate in Example 1;

[0032] Figure 2 This is a schematic diagram of the use state of the cutter device for reducing the filter tip burr rate in Example 1;

[0033] Figure 3 Schematic diagram of the cutting edge of the cutting knife in Example 1;

[0034] Figure 4 It is a schematic diagram of the structure of the scraper in Example 1;

[0035] Figure 5 is a schematic diagram of the hair dryer mechanism in Example 1;

[0036] Figure 6 This is a flow chart for cigarette production;

[0037] Figure 7 This is a picture of the rough edges of a hollow filter.

[0038] Reference numerals:

[0039] 1-cutter; 2-blowing pipe; 21-air pump; 22-pressure gauge; 23-flow regulating valve; 24-pressure relief pipeline; 3-scraper; 31-installation shaft; 32-nut; 4-frame. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0041] Example 1

[0042] like Figure 1-2 As shown, this embodiment provides a cutter device for reducing the burr rate of a filter tip, comprising: a cutter 1, a cleaning mechanism and a blower mechanism. The cutter 1 is provided with two cleaning mechanisms, each of which is equipped with a set of cleaning mechanisms and blowers. The cleaning mechanisms are located on both sides of the cutter 1 and are used to scrape off the dirt on the cutter 1. The blower mechanism is located on the outer side of the cutter, and its blowing port faces the edge of the overlapping part of the cleaning mechanism and the cutter 1, and is mainly used to cool the cutter 1 and clean the scraped dirt at the same time.

[0043] The cutter 1 is made of tungsten-cobalt-titanium hard alloy YT15 (sintered by WC, TiC and Co). The addition of TiC to the alloy improves its wear resistance and makes it suitable for high-speed cutting of general materials. The outer diameter of the cutter 1 is 90mm, and the cutting angle of the cutter 1 is 14-20°. Figure 3 As shown, the cutting blade 1 preferably has an edge angle of 17°.

[0044] According to the economic efficiency, the cutting edges of 14°, 15°, 16°, 17°, 18°, 19° and 20° were preferably selected for the experiment. Then, the number of filter burrs of the collected cigarettes and the average replacement time of the cutter 1 were counted, and different data were obtained, as shown in Table 1:

[0045] Table 1 Statistics of cigarette filter burr defect rate

[0046]

[0047] In this test, the cutter 1 with a blade angle of 17° has the best filter burr defect rate. Although the replacement time is not optimal, as the blade angle continues to increase, the sharpness decreases significantly, while the replacement time does not increase significantly. It can be seen that 17° has the advantages of a lower blade burr defect rate (0.26%) and a longer service life (41.6h), which can take into account both sharpness and retention.

[0048] Each set of cleaning mechanism includes two scrapers 3, which are located on both sides of the cutter 1. The distance between the scraper 3 and the cutter 1 is 0.2mm, and the two are partially overlapped. The length of the overlapping part is 10mm, ensuring that there is no bump or scratch when the cutter 1 is running. The upper part of the scraper 3 is provided with a cutting edge, which faces the cutter 1 and is opposite to the rotation direction of the cutter 1. Figure 4 As shown, the blade angle is 45°, and the blade is used to scrape off the dirt on the cutter 1. Specifically, the scraper 3 is installed on the frame 4 below the cutter 1 through the mounting shaft 31, and the scraper 3 is fixed on the mounting shaft 31 by a nut 32.

[0049] like Figure 5 As shown, the hair blowing mechanism includes: an air pump 21, a pressure gauge 22, a flow regulating valve 23, a blowing pipe 2 and a pressure relief pipeline 24. The air pump is connected to the blowing pipe 2 through an air supply pipeline. The pressure gauge 22 and the flow regulating valve 23 are arranged in the air supply pipeline. The pressure relief pipeline 24 is located between the pressure gauge 22 and the flow regulating valve 23 and is used for pressure division. The flow regulating valve 23 is used to adjust the air pressure when the blowing pipe 2 is blowing. During operation, the air pressure is 100kpa.

[0050] In order to determine the actual use effect of the blower mechanism, the temperature change of the cutter 1 during the normal operation of the machine for one hour was statistically analyzed, as shown in Table 2.

[0051] Table 2 Temperature changes of the cutter

[0052] time Blade temperature time Blade temperature time Blade temperature 0min 23.2℃ 65min 39.2℃ 125min 39.4℃ 5min 24.5℃ 70min 40.1℃ 130min 38.6℃ 10min 26.1℃ 75min 39.8℃ 135min 39.4℃ 15min 27.4℃ 80min 39.2℃ 140min 39.7℃ 20min 28.4℃ 85min 38.6℃ 145min 40.4℃ 25min 30.2℃ 90min 40.2℃ 150min 39.4℃ 30min 31.6℃ 95min 39.4℃ 155min 38.9℃ 35min 33.7℃ 100min 38.6℃ 160min 39.4℃ 40min 34.4℃ 105min 39.4℃ 165min 40.2℃ 45min 35.8℃ 110min 40.6℃ 170min 39.1℃ 50min 37.2℃ 115min 39.7℃ 175min 40.3℃ 55min 38.6℃ 120min 38.6℃ 180min 38.6℃ 60min 39.4℃

[0053] It can be seen from the above table that after adding the blower mechanism, the heating condition of the cutter 1 is significantly improved, and the maximum temperature is controlled below 40°C. After the temperature drops, the service life of the cutter increases to 45.8 hours.

[0054] After the unit transformation was completed, the filter tip burr quality defect phenomenon was statistically analyzed for 10 days. The statistical data is shown in Table 3.

[0055] Table 3 Survey form for quality defects (%) of filter tip end of 71# unit

[0056] time Number of burr defects (pcs) Burr defect rate (%) Day 1 6 / 100000 0.006 the next day 4 / 100000 0.004 Day 3 8 / 100000 0.008 Day 4 7 / 100000 0.007 Day 5 3 / 100000 0.003 Day 6 5 / 100000 0.005 Day 7 6 / 100000 0.006 Day 8 4 / 100000 0.004 Day 9 3 / 100000 0.003 Day 10 4 / 100000 0.004 average 5 / 100000 0.005

[0057] After the above improvements, the quality defects of burrs at the filter tip end were significantly reduced (the average burr defect rate before improvement was about 0.56%), and there was no need to frequently replace the slitting circular knife after the activity. The average downtime caused by burrs and blade dullness in the 10-day mid-shift (statistical working time: 6 hours) was 2.86 hours, then: the average downtime rate of failure = 2.86 / 6×100% = 44.7%, plus the downtime caused by other operating failures, the operating efficiency of 71# before the improvement was only 40.8%, after the improvement, the downtime caused by burrs and blade replacement was only 0.02 hours, and the operating efficiency of 71# after the activity was increased to 86.8%.

[0058] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. A cutting device for reducing the burr rate of a filter tip, comprising a cutting knife (1), characterized in that: Also includes: A cleaning mechanism is provided on both sides of the cutter (1), partially overlapping the cutter (1), and is used to scrape off dirt deposited on the cutter (1); The air blowing mechanism is arranged outside the cutter (1), with its air blowing port facing the edge of the overlapping portion between the cleaning mechanism and the cutter (1), and is used for cooling the cutter (1) and cleaning the scraped dirt.

2. The cutter device for reducing filter tip burr rate according to claim 1, characterized in that: The cleaning mechanism comprises: scrapers (3) arranged on both sides of the cutter (1); the scrapers (3) partially overlap with the cutter (1); a cutting edge is provided at the overlapping portion; the cutting edge is opposite to the rotation direction of the cutter (1).

3. The cutter device for reducing filter tip burr rate according to claim 2, characterized in that: The scraper (3) is mounted on a frame (4) below the cutter (1) via a mounting shaft (31), and a nut (32) for fixing the scraper (3) is provided on the mounting shaft (31).

4. The cutter device for reducing filter tip burr rate according to claim 2, characterized in that: The distance between the scraper (3) and the cutter (1) is 0.2 mm, and the length of the overlapping portion is 10 mm.

5. The cutter device for reducing filter tip burr rate according to claim 1, characterized in that: The hair dryer structure comprises: Air pump (21); The blowing pipe (2) is connected to the air pump (21) via an air supply pipeline; the blowing port of the blowing pipe (2) faces the edge of the overlapping portion of the cleaning mechanism and the cutter (1).

6. The cutter device for reducing filter tip burr rate according to claim 5, characterized in that: The hair dryer structure also includes: A pressure gauge (22) is arranged on the gas supply pipeline; A flow regulating valve (23), arranged on the air supply pipeline, for regulating the outlet air pressure of the blowing pipe (2); The pressure relief pipeline (24) is connected to the air supply pipeline and is located between the pressure gauge (22) and the flow regulating valve (23). The pressure relief pipeline is connected in parallel with the blowing pipe (2).

7. The cutter device for reducing filter tip burr rate according to claim 1, characterized in that: The cutting knife (1) has a blade angle of 14-20°.

8. The cutter device for reducing filter tip burr rate according to claim 1, characterized in that: The cutter (1) is made of tungsten-cobalt-titanium hard alloy YT15.

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