Improved KDFM-NWT hollow filter stick forming machine

Abstract

The invention discloses an improved KDFM-NWT hollow filter stick forming machine, which is characterized in that original equipment is transformed, the production pressure of an AF front brake roller is 1.5-1.52 bar, and the production pressure of an AF rear brake roller is 1.51-1.55 bar; the rated value of the glycerol triacetate is 105-110mg / piece; the superheater temperature of the steam section of the forming device is 170-180 DEG C, and the steam pressure of the steam section is 5.20-5.50 bar; the steam outlet holes are B81N steam holes, B82N steam holes, B84N steam holes and B86N steam holes; the cooling section is provided with a refrigerator; the refrigerator is connected with a cooling pipeline of the cooling section; the opening degree of a Y230N air valve in the cooling section is 30%-34%, and the opening degree of a Y231N air valve in the cooling section is 23%-26%; the feeding amount of a cutter of the cutting device is 11000 to 12500; the rotating speed of the TU vacuum fan ranges from 5500 r / min to 5800 r / min; a core rod of the cigarette tongue comprises a front core section and a rear core section, the rear core section is installed in the cigarette tongue, and the length of the rear core section is 270 mm. Original equipment is improved, parameters are adjusted, the limitation of original production speed is broken through, the production speed can reach 450-500 m / min, the quality precision of products is effectively improved, and the product quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of hollow filter rod forming, and relates to an improved KDFM-NWT hollow filter rod forming machine. Specifically, it is a transformation of the original equipment to break through the limitation of the original production speed and improve the production efficiency on the premise of ensuring the production quality. Background Art

[0002] The KDFM-NWT filter rod forming machine is a forming equipment for producing fine-sized (circumference 16.35 mm) hollow filter rods. As shown in Figure 1 As shown, the structure of the KDFM-NWT filter rod forming machine is as shown in Figures 2 - 5 As shown, it mainly consists of an AF opening device 1, a forming device 4, and a cutting device 5.

[0003] Among them, the AF opening device consists of a complete set of tow rollers and a plasticizer spraying mechanism 15, including: a braking roller, an input roller 11, a stretching roller 12, a guiding and pressing roller 13, and a bunching roller 14. The AF opening device completes the processes of pre-stretching, stretching, and relaxation of the tow. The contact pressure acting on the drawn tow by the braking roller pressure will balance the fluctuating tension on the tow, providing a stable tow band for subsequent opening.

[0004] The forming device 4 consists of a steam section and a cooling section. The steam section heats the filter rod strip wrapped by the cloth tape with high-temperature steam, and the cooling section is used to cool and shape the heated filter rod strip.

[0005] The cutting device 5 consists of a product bar sensor system EYEPORT, a cutting tube wheel, a tool holder, a V-shaped guide rail, a transmission device, a receiving drum, a sampling drum, a reduction drum, and an ICPS-CS detection system (the ICPS-CS detection system uses a camera to inspect the end face of the filter tip). The detection parameters of the ICPS-CS detection system include the front icps outer ellipticity offset value, the rear icps outer ellipticity offset value, the front icps minimum wall thickness offset value, and the rear icps minimum wall thickness offset value.

[0006] The front tow and the rear tow are flattened by the AF opening device 1, sprayed with triacetin (plasticizer), and then converge through the tow collector and are sent into the tobacco tongue 3 through the tow support 2. A forming mandrel is fixed in the tobacco tongue 3. The forming mandrel is concentrically and fixedly placed with the tobacco tongue cavity. The forming mandrel extends to the steam section of the forming device 4. The tow band wraps the forming mandrel through the tobacco tongue 3 to form a hollow circle, and then enters the steam section to be formed at high temperature by steam to form a hollow circular tube filter rod, and then enters the cooling section to be cooled into a filter rod. The filter rod enters the cutting device 5 to be cut into filter rod strips, and at the same time, the filter rod strips are detected. The filter rod strips finally enter the bin.

[0007] The maximum production speed of the KDFM-NWT filter rod forming machine is 360 m / min, which cannot meet the production requirements. Therefore, it is necessary to transform the original equipment. Summary of the Invention

[0008] The present invention provides an improved KDFM-NWT hollow filter rod forming machine. By transforming the mechanical part of the original equipment and adjusting its production parameters, the production speed is greatly improved.

[0009] Specifically, the present invention is implemented as follows:

[0010] An improved KDFM-NWT hollow filter rod forming machine includes an AF opening device, a tow support, a tobacco tongue, a forming device, a cutting device, and a TU vacuum fan connected in sequence;

[0011] In the AF opening device, the production pressure of the front AF braking roller is 1.5 - 1.52 bar, and the production pressure of the rear AF braking roller is 1.51 - 1.55 bar; the rated value of triacetin is 105 - 110 mg / filter rod;

[0012] The forming device includes a steam section and a cooling section. The temperature of the superheater in the steam section is 170 - 180 °C, and the steam pressure in the steam section is 5.20 - 5.50 bar; the outlet steam holes are B81N, B82N, B84N, and B86N steam holes; there are several steam outlet holes in the tobacco feeding groove of the steam section, and the steam outlet holes are inclined towards the filter rod direction, and the included angle with the bottom surface of the tobacco feeding groove is 5°;

[0013] The cooling section is provided with a refrigerator, and the refrigerator is connected to the cooling section through a cooling pipeline;

[0014] The opening degree of the Y230N air valve in the cooling section is 30% - 34%, and the opening degree of the Y231N air valve is 23% - 26%;

[0015] In the cutting device, the cutter feed is 11000 - 12500 filter rods;

[0016] The rotation speed of the TU vacuum fan is 5500 - 5800 r / min;

[0017] The tow support is provided with a front tow over-roller and a rear tow over-roller. There is one front tow over-roller and one rear tow over-roller, and the two are coaxially installed;

[0018] The forming mandrel in the tobacco tongue includes a front core section and a rear core section. The rear core section is installed in the tobacco tongue, and the length of the rear core section is 270 mm.

[0019] Furthermore, the outlet diameter of the tobacco tongue is 5.9 mm.

[0020] Further, the length of the smoke tongue is 330 mm, and the angle α between its axis and the generatrix is 11.5°.

[0021] Further, the temperature of the cooling air output by the refrigerator is 8 °C.

[0022] Further, the outer diameter of the tape adjusting wheel of the forming device is 39.98 mm, the inner diameter is 25.26 mm, and the thickness of the two side protrusions is 5.79 mm.

[0023] Further, a filter rod stabilizing device is provided between the forming device and the cutting device. The filter rod stabilizing device includes:

[0024] A support assembly, provided at the entrance of the cutting device and configured to move in the vertical direction. There are two filter rod support grooves on it. A plurality of negative pressure suction holes are provided in the filter rod support grooves. The axis of the filter rod support grooves coincides with the axis of the cutting device entrance. The filter rod strip passes through the filter rod support grooves and then enters the cutting device;

[0025] A negative pressure device, connected to the negative pressure suction holes, for providing negative pressure in the filter rod support grooves to stabilize the filter rod strip.

[0026] Further, the support assembly includes:

[0027] A support back plate, provided on the back plate of the filter rod forming machine and configured to move in the vertical direction;

[0028] A support plate, fixed to the bottom of the support back plate, and the filter rod support grooves are provided on the support plate.

[0029] Further, a limiting member is provided in the conveying space between the cooling section and the filter rod stabilizing device. A limiting groove is provided on the limiting member; Magnets are provided at the bottom of both sides of the limiting member, and the magnets are used to adsorb the machine bottom plate at the conveying space; A handle is provided at the top of the limiting member.

[0030] Further, the diaphragm in the cutting device is a silicone diaphragm.

[0031] Further, a temperature controller is provided in the steam section. The temperature controller is electrically connected to the steam generator in the steam section for detecting the temperature of the steam section. When the temperature of the steam section exceeds the temperature threshold, the steam generator is opened.

[0032] Further, the outer ovality offset value of the front icps in the cutting device is -0.35 to -0.25 mm, and the outer ovality offset value of the rear icps is -0.4 to -0.3 mm; The minimum wall thickness offset value of the front icps is 0.10 to 0.20 mm, and the minimum wall thickness offset value of the rear icps is 0.10 to 0.20 mm.

[0033] The working principle of the present invention:

[0034] AF Opener: After the equipment speed was increased, the opening effect of the AF opener on the tow was not good, affecting the production quality. Therefore, by reducing the production pressure of the front braking roller of AF and the production pressure of the rear braking roller of AF, the contact pressure exerted by the braking roller pressure on the drawn tow will balance the fluctuating tension on the tow bundle, providing a stable tow band for subsequent opening.

[0035] Tow Support: After the equipment speed was increased, the original tow support could not fully and evenly unfold the tow, resulting in uneven product filling amount and causing phenomena such as softening and knuckle of the filter rod. Therefore, the number of idler rollers on the original tow support was reduced, so that the tow was fully unfolded and evenly distributed on both sides of the core rod before entering the tobacco tongue, ensuring the quality of the filter rod.

[0036] Tobacco Tongue: After the speed increase, the vibration of the equipment was stronger than before, and the vibration displacement of the core rod increased from the original 10um to 50um, resulting in severe shaking of the tow. The rejection rate of the product center hole eccentricity was 0.7%-0.8%. Therefore, the rear core section of the core rod was lengthened from 240mm to 270mm, so that the length of the front core section embedded in the rear core section became longer, thereby reducing the shaking of the front core section with the tow during the operation of the equipment, and further reducing the rejection rate of the center hole eccentricity.

[0037] Steam Section: The original steam section used 3 steam holes for steam output and the steam outlet line in the tobacco feeding groove for steam output. The steam output was insufficient to ensure the formation of the filter rod, resulting in unqualified hardness and quality defects such as product bending. Therefore, it was changed to 4 steam holes for steam output, and at the same time, the steam outlet line was changed to steam outlet holes, and the steam outlet holes were arranged obliquely, which could increase the steam output and ensure that the steam output was not insufficient due to partial blockage.

[0038] Cooling Section: After the speed increase, the temperature increased, and the original equipment had no cooling form. Therefore, by installing a refrigerator, the temperature of the cooling air was reduced, and the opening of the cooling section air valve was reduced, which not only ensured that the hardness of the filter rod met the process standards under the condition of speed increase operation, but also reduced the consumption of compressed air.

[0039] Cutting Device: The cutting knife is respectively installed with a grinding safety frame with a grinding wheel mounting seat and a grinding wheel motor at both ends. The grinding wheel is used for grinding and dressing. The feed of the cutting knife is related to the cutting quantity. After reducing the feed of the cutting knife, while meeting the product quality requirements, the maintenance frequency of the grinding wheel and the grinding wheel motor is greatly reduced, and the cost is reduced.

[0040] TU Vacuum Fan: The vacuum fan is used to generate the negative pressure required to adsorb the filter tip on the suction groove pair. The TU-M fan will assist in this, and reducing the fan speed can reduce the impurities sucked into the fan due to the negative pressure, ensuring the service life of the fan.

[0041] Compared with the prior art, the beneficial effects of the present invention:

[0042] By adjusting the mechanical mechanism and production parameters of the original equipment, the present invention greatly improves its production speed, which can reach 450 - 500 m / min. At the same time, it can also effectively improve the quality accuracy of the product and ensure the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic structural diagram of a hollow filter rod;

[0044] Figure 2 It is a schematic structural diagram of an existing KDFM-NWT filter rod forming machine;

[0045] Figure 3 It is a schematic structural diagram of an existing AF opening device;

[0046] Figure 4 It is Figure 2 The partial enlarged view of A in

[0047] Figure 5 It is a schematic structural diagram of the tow support of an existing KDFM-NWT filter rod forming machine;

[0048] Figure 6 It is a schematic structural diagram of the KDFM-NWT filter rod forming machine in Embodiment 1;

[0049] Figure 7 It is a schematic structural diagram of the tow support in Embodiment 1;

[0050] Figure 8 It is a schematic diagram of the usage state of the tow support in Embodiment 1;

[0051] Figure 9 It is a schematic diagram of the usage state of the tow support and the tobacco tongue in Embodiment 1;

[0052] Figure 10 It is a schematic structural diagram of the tobacco tongue in Embodiment 1;

[0053] Figure 11 It is the front view of the tobacco tongue in Embodiment 1;

[0054] Figure 12 It is a schematic structural diagram of the core rod in Embodiment 1;

[0055] Figure 13 It is the cloth belt wear amount diagram in Embodiment 1;

[0056] Figure 14 It is a schematic structural diagram of the forming device in Embodiment 1;

[0057] Figure 15Schematic diagram of the steam pressing plate structure; among them, (a) is the schematic diagram of the steam pressing plate structure in the prior art, and (b) is the schematic diagram of the steam pressing plate structure in Embodiment 1;

[0058] Figure 16 Schematic diagram of the usage state of the lower steam pressing plate in Embodiment 1;

[0059] Figure 17 Schematic diagram of the external structure of the cooling section in Embodiment 1;

[0060] Figure 18 Schematic diagram of the structure of the cloth belt adjusting wheel; among them, (a) is the schematic diagram of the structure of the cloth belt adjusting wheel in the prior art, and (b) is the schematic diagram of the structure of the cloth belt adjusting wheel in Embodiment 1;

[0061] Figure 19 Schematic diagram of the structure of the filter rod stabilizing device in Embodiment 1;

[0062] Figure 20 Schematic diagram of the usage state of the filter rod stabilizing device in Embodiment 1;

[0063] Figure 21 Schematic diagram of the principle of the filter rod stabilizing device in Embodiment 1;

[0064] Figure 22 Schematic diagram of the structure of the filter rod limiting member in Embodiment 2;

[0065] Figure 23 Schematic diagram of the usage state of the filter rod limiting member in Embodiment 2.

[0066] Reference numerals:

[0067] 1 - AF opening device; 11 - input roller; 12 - stretching roller; 13 - guiding and pressing roller; 14 - bunching roller; 2 - tow support; 21 - front - stage tow passing roller; 22 - rear - stage tow passing roller; 3 - tobacco tongue; 31 - core rod; 32 - front core section; 33 - rear core section; 4 - forming device; 41 - steam section; 411 - steam pressing plate; 412 - steam hole; 413 - steam outlet line; 414 - steam outlet hole; 42 - cooling section; 43 - refrigerator; 5 - cutting device; 61 - support back plate; 62 - support plate; 621 - filter rod support groove; 622 - negative pressure suction hole; 63 - suction joint; 64 - suction pipe; 7 - filter rod strip; 8 - limiting member; 81 - limiting groove; 82 - magnet; 83 - handle. Detailed implementation manners

[0068] The present invention will be further described in detail below in conjunction with the accompanying drawings through specific implementation manners.

[0069] Embodiment 1

[0070] As Figure 6As shown in the figure, this embodiment provides an improved KDFM-NWT hollow filter rod forming machine, which includes an AF opening device 1, a tow support 2, a tobacco tongue 3, a forming device 4, a cutting device 5, and a TU vacuum fan connected in sequence. As Figures 7 - 9 shown, the tow support 2 is provided with a front tow roller 21 and a rear tow roller 22 coaxially installed. For the same tow, the two rollers of the original tow support are changed to a single roller. Since the conveying speed of the tow is increased, in this embodiment, the number of tow rollers is reduced to increase the distance between the roller and the tobacco tongue 3, so that the tow can be fully unfolded before entering the tobacco tongue 3 and can be evenly distributed on both sides of the core rod 31 after entering the tobacco tongue 3, ensuring the quality of the filter rod.

[0071] As Figures 10 - 11 shown, the tobacco tongue 3 is a conical structure as a whole, and the core rod 31 is fixed inside the tobacco tongue 3. The length of the tobacco tongue 3 is 330 mm, and the angle α between its axis and the generatrix is 11.5°, so that the tow can be effectively extended and converged when entering the tobacco tongue 3, and the tow can evenly wrap the core rod 31, thus ensuring uniform filling of each part of the filter rod and improving the central roundness. As Figure 12 shown, the core rod 31 includes a front core section 32 and a rear core section 33. Among them, the length of the rear core section 33 is increased from the original 240 mm to 270 mm. Without changing the installation position of the rear core section 33 and the tobacco tongue 3, the length of the front core section 32 embedded in the rear core section 32 becomes longer, becoming mm, thereby reducing the length of the exposed part of the front core section 32, and thus reducing the situation of the front core section 32 shaking with the tow during the operation of the equipment. The length of the part of the rear core section 33 extending into the tobacco tongue 3 is 32 mm. After the equipment speed is increased, the rear core section 33 is lengthened to 270 mm, so that the eccentric rejection rate is reduced from the original 0.7%-0.8% to 0.1%-0.2%.

[0072] Furthermore, during the forming process, the tow is always wrapped by a cloth belt, and the cloth belt is conveyed by a cloth belt circulation device. The cloth belt adjusting wheel in the cloth belt circulation device is used to adjust the left and right positions of the cloth belt to keep the position of the cloth belt in the cigarette feeding channel. In this embodiment, as Figure 18 shown, the outer diameter of the cloth belt adjusting wheel is 39.98 mm, the inner diameter is 25.26 mm, and the thickness of the convex parts on both sides is 5.79 mm. Compared with the original cloth belt adjusting wheel, the overall thickness remains unchanged, the inner and outer diameters are reduced, and the thickness of the convex parts on both sides is increased, effectively improving the running stability of the cloth belt and the stability of the filter strip, and solving the problem of contact blind spots between the cloth belt and the cloth belt adjusting wheel under the condition of increased equipment speed.

[0073] In addition, since the friction between the cloth belt and the tobacco tongue 3 increases after the speed is increased, resulting in the cloth belt reaching the reasonable wear degree in advance, therefore, the diameter of the outlet of the tobacco tongue 3 is changed from 5.7 mm to 5.9 mm, as Figure 13As shown, by appropriately increasing the diameter of the cigarette rod, while ensuring the forming effect of the tow, the wear amount of the cloth belt per unit time is reduced, and the wear of the cloth belt is delayed.

[0074] As Figure 14 shown, the forming device 4 includes: a steam section 41 and a cooling section 42. The steam section 41 includes a steam pressing plate 411, a steam generator, a superheater, a temperature controller, and a steam supply pipeline. The temperature controller is electrically connected to the steam generator and is used to detect the temperature of the steam section 41. When the temperature of the steam section 41 exceeds the temperature threshold (such as 180 °C), the steam generator is opened, preventing dry burning and overheating of the heater therein, extending the service life of the heating rod, and enhancing the safety guarantee of the equipment and personnel. The steam pressing plate 411 is divided into an upper steam pressing plate and a lower steam pressing plate. After the upper steam pressing plate and the lower steam pressing plate are closed, the smoke feeding grooves on the two enclose to form a smoke feeding channel. The hollow tow passing through the mandrel 31 is heated by steam when entering the smoke feeding channel.

[0075] As Figure 15 shown in (a) and (b) of , there are eight steam holes 412 on the steam pressing plate 411, namely B81N, B82N, B83N, B84N, B85N, B86N, B87N, and B88N. Among them, when the production speed is 360 m / min, three steam holes 412, namely B81N, B82N, and B84N, are used. After the speed increase, the air outlet of the original three steam holes 412 results in unqualified hardness, and there will be a quality defect of product bending. Therefore, the steam holes 412 for air outlet are changed to B81N, B82N, B84N, and B86N to make the product hardness index meet the process standard.

[0076] The air outlet volume of the original steam outlet line 413 of the steam pressing plate 411 is 0.02 m 3 / s. Because it is not enough to ensure the forming of the filter rod after the speed increase and the hardness of the filter rod does not meet the standard, the steam outlet line 413 in the smoke feeding groove of the steam pressing plate 411 is changed to a steam outlet hole 414, and the air outlet volume is 0.06 m 3 / s to ensure the hardness of the filter rod. The steam pressing plate 411 is composed of an upper and a lower part. Steam is sprayed from the steam outlet holes 414 of the upper steam pressing plate onto the filter rod strip 6 and discharged from the steam outlet holes 414 on the lower steam pressing plate, forming an upward-in and downward-out jet form. Since the steam volume is large after the speed increase, water vapor condensation products will be generated after the steam contacts the filter rod. Sometimes the air supply volume is not very stable during the air supply process. When the air supply is excessive, it needs to be discharged, and the water vapor condensation products will be discharged together during the discharge process. However, there will be a situation where the water vapor condensation products are not discharged smoothly, resulting in the blockage of the steam outlet holes 414 of the lower steam pressing plate. Therefore, as Figure 16 shown, the steam outlet holes 414 are set to be inclined towards the filter rod direction, and the included angle with the bottom surface of the smoke feeding groove is 5° to facilitate the discharge of the water vapor condensation products.

[0077] AsFigure 17 As shown in the figure, the cooling section 42 includes a cooling pressing plate, a refrigerator 43, and cooling pipelines. The upper and lower cooling pressing plates enclose a tobacco passing channel. After the refrigerator 43 cools the normal-temperature cooling air to 8°C, it is sent to the cooling pressing plate through the cooling pipelines and blown out from the cooling holes on the cooling pressing plate, acting on the filter rod strip, thereby cooling the filter rod strip. There are two cooling pipelines, which are respectively controlled by the Y230N air valve and the Y231N air valve. The opening degree of the Y230N air valve in the cooling section is 30% - 34% (originally 38%), and the opening degree of the Y231N air valve is 23% - 26% (originally 30%). Compared with the original cooling section, the refrigerator 43 is installed to reduce the temperature of the cooling air. At the same time, the opening degrees of the Y230N air valve and the Y231N air valve are lowered. While ensuring the hardness of the filter rod strip 6, the consumption of compressed air can be reduced.

[0078] Through the improvement of the forming device 4, the present invention can effectively improve the hardness of the filter rod, thereby avoiding the situation that the roundness of the circumference and the roundness of the hollow part do not meet the standards due to insufficient hardness during the subsequent cutting and storage processes, thereby ensuring that the roundness of the finally produced filter rod meets the design specifications.

[0079] Furthermore, since the filter rod is in a suspended state between the cooling section 42 and the inlet of the cutting device 5, after the speed is increased, the shaking amplitude of the filter tip strip at this position is relatively large, causing the equipment to frequently stop due to running-off of the strip, seriously affecting the equipment efficiency. Moreover, it will cause the filter rod strip to be unstable when entering the cutting position, resulting in uneven filter rod cuts and uneven lengths of the filter rods, affecting the product quality. Therefore, as Figures 19 - 20 shown in the figure, a filter rod stabilizing device is provided between the cooling section 42 and the cutting device 5. By using the method of support + negative pressure, the filter rod strip 7 is restricted on the filter rod stabilizing device, which can effectively reduce the shaking of the hollow filter rod strip and ensure the quality of the hollow filter rod. After the speed is increased, after installing this filter rod stabilizing device, the total rejection rate of ICPS is reduced from the original 7% - 8% to 1 - 1.5%.

[0080] Specifically, the filter rod stabilizing device includes: a support assembly and a negative pressure device. The support assembly includes: a support back plate 61 and a support plate 62. The support back plate 61 is installed on the back plate of the forming machine. There are four vertical waist-shaped holes on it. After the screws pass through the waist-shaped holes, they are connected to the back plate of the forming machine. By adjusting the position of the screws in the waist-shaped holes, the height of the support back plate 61 can be adjusted. The support plate 62 is installed at the bottom of the support back plate 61 through screws, so that the support plate 62 is between the cooling section 42 and the inlet of the cutting device 5 to stabilize the filter rod strip 7.

[0081] As Figures 19 - 21As shown in the figure, there are two parallel filter rod support grooves 621 on the support plate 62, corresponding to the two smoke passageways of the cooling section 42 respectively. Both ends of the two filter rod support grooves 621 are in a flared shape to avoid scraping caused by a smaller inlet and outlet, which may affect the conveyance of the filter rod strip 7. There are four negative pressure suction holes 622 at the bottom of each filter rod support groove 621. The interior of the support plate 62 has a double-chamber structure, and each chamber corresponds to the four negative pressure suction holes 622 of one filter rod support groove 621. The bottom end is connected to the suction air pipe 64 through the suction joint 63, and the suction air pipe 64 is connected to a negative pressure device (fan). The servo controller of the negative pressure device is connected to the control system through the Ethernet bus. The negative pressure device sucks, and the sucked air is aggregated to the suction air pipe 64 through the suction joint 63, enabling the negative pressure suction holes 622 to adsorb the filter rod strip 7, so that the filter rod strip 7 can be restricted within the filter rod support groove 621, reducing its jitter.

[0082] Furthermore, the diaphragm of the original cutting device 5 uses inflation after being electrified to play an isolation role. However, the original diaphragm is made of rubber material, which is easily damaged, and the isolation effect is not good, and water seepage is likely to occur, resulting in the burning of downstream electrical components. Therefore, in this application, the diaphragm is changed to a silicone diaphragm, which can not only extend the service life of the diaphragm but also reduce the use cost.

[0083] Embodiment 2

[0084] On the basis of Embodiment 1, there is a conveying space between the cooling section 42 and the filter rod stabilizing device. After the equipment is greatly speeded up, the filter rods in this conveying space will jump, and there is a situation of jumping out of the conveying groove. To stabilize the filter rods in this area, as Figures 22 - 23 shown in the figure, a limiting member 8 is arranged in this area to restrict the filter rod strip 7 and prevent it from jumping out of the conveying groove. Specifically, there are two limiting grooves 81 on the limiting member 8, which respectively correspond to the front filter rod and the rear filter rod. Magnets 82 are arranged at the bottom of both sides of the limiting member 8. The magnets 82 are used to adsorb the machine bottom plate at the conveying space to install the limiting member 8 in the conveying space between the cooling section 42 and the filter rod stabilizing device. A handle 83 is arranged at the top of the limiting member 8 for easy taking of the limiting member 8. Through this limiting member 8, the jumping of the filter rod strip 7 can be restricted, avoiding the phenomenon of the filter rod strip 7 jumping out of the groove before entering the filter rod stabilizing device, and improving the stability of the conveyance of the filter rod strip 7.

[0085] Embodiment 3

[0086] On the hardware basis of Embodiment 1, the parameters of the KDFM-NWT filter rod forming machine are adjusted:

[0087] Original parameters Parameters of this embodiment Speed (m / min) 360 450 Steam pressure during steam section production (bar) 5.00 5.20 Superheater temperature of steam section (°C) 150 170 Opening of Y230N air valve in cooling section 38％ 34％ Opening of Y231N air valve in cooling section 30％ 26％ Rated value of triacetin (mg / branch) 100 110 Offset value of icps outer ovality - after (mm) -0.50 -0.40 Offset value of icps outer ovality - before (mm) -0.45 -0.35 Offset value of icps minimum wall thickness: after (mm) 0.50 0.20 Offset value of icps minimum wall thickness: before (mm) 0.30 0.20 SEF cutter feed (branches) 14000 12500 Speed of TU vacuum fan (r / min) 6000 5800 Production pressure of AF front braking roller (bar) 1.55 1.52 Production pressure of AF rear braking roller (bar) 1.61 1.55

[0088] Embodiment 4

[0089] On the hardware basis of Embodiment 1, the parameters of the KDFM-NWT filter rod forming machine are adjusted:

[0090] Original parameters Parameters of this embodiment Speed (m / min) 360 500 Steam pressure during steam section production (bar) 5.00 5.50 Superheater temperature of steam section (°C) 150 180 Opening of Y230N air valve in cooling section 38％ 30％ Opening of Y231N air valve in cooling section 30％ 23％ Rated value of triacetin (mg / branch) 100 105 Offset value of icps outer ovality - after (mm) -0.50 -0.30 Offset value of icps outer ovality - before (mm) -0.45 -0.25 Offset value of icps minimum wall thickness: after (mm) 0.50 0.10 Offset value of icps minimum wall thickness: before (mm) 0.30 0.10 Cutter feed (branches) 14000 11000 Speed of TU vacuum fan (r / min) 6000 5500 Production pressure of AF front braking roller (bar) 1.55 1.5 Production pressure of AF rear braking roller (bar) 1.61 1.51

[0091] The quality of the hollow filter rods before and after improvement was detected, and the detection data are shown in the following table:

[0092]

[0093]

[0094] As can be seen from the above table, for the improved KDFM-NWT hollow filter rod forming machine, at the production speeds of 450 m / min and 500 m / min, the quality of the produced hollow filter rods all meets the requirements.

[0095] The above uses specific examples to elaborate on the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the technical field to which the present invention pertains, based on the idea of the present invention, several simple deductions, deformations or substitutions can also be made.

Claims

1. An improved KDFM-NWT hollow filter rod forming machine, comprising an AF opening device, a tow support, a cigarette tongue, a forming device, a cutting device and a TU vacuum blower connected in sequence, characterized in that: The operating speed is 450-500m / min; In the AF opening device, the production pressure of the AF front brake roller is 1.5-1.52 bar, and the production pressure of the AF rear brake roller is 1.51-1.55 bar; the rated value of triacetin is 105-110 mg / piece; The forming device comprises: a steam section and a cooling section, the superheater temperature of the steam section is 170-180°C, the steam pressure of the steam section is 5.20-5.50 bar; the steam outlet holes are B81N, B82N, B84N and B86N steam holes; a plurality of steam outlet holes are arranged in the smoke delivery groove of the steam section, the steam outlet holes are inclined toward the filter rod, and the angle between the steam outlet holes and the bottom surface of the smoke delivery groove is 5°; The cooling section is provided with a refrigerator, and the refrigerator is connected to the cooling section through a cooling pipeline; The opening of the Y230N gas valve in the cooling section is 30% to 34%, and the opening of the Y231N gas valve is 23% to 26%; In the cutting device, the cutter feed is 11,000 to 12,500 pieces; The rotation speed of the TU vacuum blower is 5500-5800r / min; The tow support is provided with a front tow roller and a rear tow roller, each of which is provided with one and the two are coaxially mounted; The forming core rod in the cigarette tongue comprises a front core segment and a rear core segment. The rear core segment is installed in the cigarette tongue, and the length of the rear core segment is 270 mm.

2. The improved KDFM-NWT hollow filter rod forming machine as claimed in claim 1, characterized in that: The diameter of the cigarette tongue outlet is 5.9 mm.

3. The improved KDFM-NWT hollow filter rod forming machine as claimed in claim 2, characterized in that: The length of the cigarette tongue is 330 mm, and the angle α between its axis and the generatrix is ​​11.5°.

4. The improved KDFM-NWT hollow filter rod forming machine as claimed in claim 1, characterized in that: The cooling air temperature output by the refrigerator is 8°C.

5. The improved KDFM-NWT hollow filter rod forming machine as claimed in claim 1, characterized in that: The outer diameter of the cloth belt adjusting wheel of the forming device is 39.98 mm, the inner diameter is 25.26 mm, and the thickness of the protrusions on both sides is 5.79 mm.

6. The improved KDFM-NWT hollow filter rod forming machine as claimed in claim 1, characterized in that: A filter rod stabilizing device is provided between the forming device and the cutting device, and the filter rod stabilizing device comprises: The support assembly is arranged at the inlet of the cutting device and is configured to move in the vertical direction. Two filter rod support grooves are arranged on the support assembly. A plurality of negative pressure air suction holes are arranged in the filter rod support grooves. The axis of the filter rod support grooves coincides with the axis of the inlet of the cutting device. The filter rod passes through the filter rod support grooves and enters the cutting device. The negative pressure device is connected to the negative pressure air suction hole and is used to provide negative pressure in the filter rod supporting groove to stabilize the filter rod.

7. The improved KDFM-NWT hollow filter rod forming machine as claimed in claim 6, characterized in that: The support assembly comprises: A supporting back plate is disposed on the back plate of the filter rod forming machine and is configured to move in a vertical direction; The support plate is fixed to the bottom of the support back plate, and the filter rod support groove is arranged on the support plate.

8. The improved KDFM-NWT hollow filter rod forming machine as claimed in claim 6, characterized in that: A limit piece is provided in the conveying space between the cooling section and the filter rod stabilizing device, and a limit groove is provided on the limit piece; magnets are provided at the bottom of both sides of the limit piece, and the magnets are used to adsorb the machine bottom plate at the conveying space; a handle is provided on the top of the limit piece.

9. The improved KDFM-NWT hollow filter rod forming machine as claimed in claim 1, characterized in that: The steam section is provided with a temperature controller, which is connected to the steam generator circuit of the steam section and is used to detect the temperature of the steam section. When the temperature of the steam section exceeds a temperature threshold, the steam generator is disconnected.

10. The improved KDFM-NWT hollow filter rod forming machine as claimed in claim 1, characterized in that: In the cutting device, the front icps outer ovality offset value is -0.35 to -0.25 mm, and the rear icps outer ovality offset value is -0.4 to -0.3 mm; the front icps minimum wall thickness offset value is 0.10 to 0.20 mm, and the rear icps minimum wall thickness offset value is 0.10 to 0.20 mm.

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