Filter stick forming device of KDFM-NWT hollow filter stick forming machine

Abstract

The utility model discloses a filter rod forming device of a KDFM-NWT hollow filter rod forming machine, which comprises a steam section and a cooling section, a filter rod is heated by the steam section and then sent to the cooling section for cooling and shaping, the steam section comprises a steam pressing plate and a steam generator, the temperature of a superheater of the steam section 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; a plurality of steam outlet holes are formed in the smoke feeding groove of the steam pressing plate; the cooling section is provided with a refrigerator, and the refrigerator is connected with the cooling section through a cooling pipeline; the number of the cooling pipelines is two, the two cooling pipelines are controlled by a Y230N air valve and a Y231N air valve respectively, the opening degree of the Y230N air valve is 30%-34%, and the opening degree of the Y231N air valve is 23%-26%. According to the utility model, by changing the steam hole and steam outlet line structure of the original steam section and additionally arranging the refrigerator on the cooling section, the hardness of the filter stick can be effectively improved, the quality defects of product bending and the like caused by insufficient hardness are avoided, and the product quality during speed-up production is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of hollow filter rod forming, in particular to a filter rod forming device of a KDFM-NWT hollow filter rod forming machine. Background Art

[0002] KDFM-NWT filter rod forming machine is a forming equipment for producing hollow filter rods with fine specifications (circumference 16.35mm). Figure 1 As shown, the structure of KDFM-NWT filter rod making machine is as follows Figure 2-4 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 is composed of a complete set of filament rollers and plasticizer spraying mechanism 15, including: brake roller, input roller 11, stretching roller 12, guide pressure roller 13 and bunching roller 14. The AF opening device completes the process of pre-stretching, stretching and relaxing the filament bundle. The contact pressure exerted on the extracted filament bundle by the brake roller pressure will balance the fluctuating tension on the filament bundle package, providing a stable filament bundle belt for subsequent opening.

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

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

[0006] The front and rear tows are flattened by the AF opening device 1 and sprayed with triacetin (plasticizer), and then converged by the tow collector and sent to the cigarette tongue 3 through the tow support 2. A forming core rod is fixed in the cigarette tongue 3. The forming core rod is fixed concentrically with the cigarette tongue cavity, and the forming core rod extends to the steam section of the forming device 4. The tow belt wraps the forming core rod through the cigarette tongue 3 to form a hollow circle, and then enters the steam section for high-temperature steam molding to form a hollow round empty 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 the filter rod strips are tested at the same time, and the filter rod strips finally enter the silo.

[0007] The fastest production speed of the KDFM-NWT filter rod forming machine is 360m / min, which cannot meet the production needs. When the equipment was modified to increase the speed, it was found that the steam output of the steam section 4 of the forming device was insufficient to ensure the forming of the filter rod, resulting in the hardness not meeting the standard and the quality defect of product bending. In addition, after the equipment speed is increased, the temperature increases, resulting in the cooling section being unable to quickly cool the filter rod, resulting in poor hardness. Based on this, the original forming device needs to be modified so that the forming device can ensure that the hardness of the filter rod meets the process standards under the condition of speed-up operation. Utility Model Content

[0008] The utility model provides a filter rod forming device of a KDFM-NWT hollow filter rod forming machine, which ensures the hardness of the filter rod after the equipment is accelerated and avoids quality defects such as product bending by modifying the forming device of the original equipment.

[0009] Specifically, the utility model is achieved as follows:

[0010] A KDFM-NWT hollow filter rod forming machine filter rod forming device, comprising a steam section and a cooling section. The filter rod is heated in the steam section and then sent to the cooling section for cooling and shaping. The steam section comprises: a steam pressure plate and a steam generator. The temperature of the steam section superheater is 170-180°C, and 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 pressure plate.

[0011] The cooling section is provided with a refrigerator, and the refrigerator is connected to the cooling section through a cooling pipeline; there are two cooling pipelines, which are respectively controlled by a Y230N gas valve and a Y231N gas valve, the opening of the Y230N gas valve is 30% to 34%, and the opening of the Y231N gas valve is 23% to 26%;

[0012] Furthermore, the steam outlet hole is inclined toward the filter rod, and the angle between the steam outlet hole and the bottom surface of the smoke delivery groove is 5.

[0013] Furthermore, the steam outlet holes are provided in a plurality of groups, and each group includes a plurality of sub-steam outlet holes.

[0014] Furthermore, each group of steam outlet holes includes three sub-steam outlet holes evenly distributed along the circumference of the smoke delivery groove.

[0015] Furthermore, each group of steam outlet holes includes five sub-steam outlet holes distributed in an X shape.

[0016] Furthermore, the cooling air temperature output by the refrigerator is 8°C.

[0017] The working principle of this utility model:

[0018] Steam section: The original steam section uses three steam holes (B81N, B82N, B84N) to discharge steam and the steam outlet line 413 in the smoke delivery groove to discharge steam. The steam output is insufficient to ensure the formation of the filter rod, resulting in substandard hardness and quality defects such as product bending. Therefore, it is changed to four steam holes (B81N, B82N, B84N and B86N) to discharge steam, and the steam outlet line 413 is changed to the steam outlet hole 414, which can increase the steam output. After the steam volume increases, water vapor condensation products will be produced after the steam contacts the filter rod. The gas supply volume is sometimes not stable during the gas supply process. When the gas supply is too much, it needs to be discharged. During the discharge process, the water vapor condensation products will be discharged together, but the water vapor condensation products will not be discharged smoothly, resulting in the blockage of the steam outlet hole 414. Therefore, the steam outlet hole 414 is set to be inclined toward the filter rod to facilitate the discharge of the water vapor condensation products.

[0019] Cooling section: After speeding up, the temperature increases. The original equipment has no cooling form. Therefore, by installing a refrigerator, the cooling air temperature is reduced and the opening of the cooling section air valve is reduced. This not only ensures that the hardness of the filter rod meets the process standards under the speed-up operation condition, but also reduces the consumption of compressed air.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The utility model can effectively improve the hardness of the filter rod, avoid quality defects such as product bending, and ensure product quality during speed-up production by changing the steam hole and steam outlet line structure of the original steam section and adding a refrigerator to the cooling section. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a hollow filter rod;

[0023] Figure 2 It is a structural schematic diagram of the existing KDFM-NWT filter rod forming machine;

[0024] Figure 3 It is a structural schematic diagram of an existing AF opening device;

[0025] Figure 4 for Figure 2 A partial enlarged view of the middle A;

[0026] Figure 5 It is a structural schematic diagram of the molding device in Example 1;

[0027] Figure 6 Schematic diagram of the structure of a steam pressure plate; wherein (a) is a schematic diagram of the structure of a steam pressure plate in the prior art, and (b) is a schematic diagram of the structure of a steam pressure plate in Example 1;

[0028] Figure 7 This is a schematic diagram of the use status of the lower steam pressure plate in Example 1;

[0029] Figure 8 This is a schematic diagram of the external structure of the cooling section in Example 1;

[0030] Fig. 9 Schematic diagram of the structure of the steam pressure plate in Example 2.

[0031] Reference numerals:

[0032] 1-AF opening device; 11-input roller; 12-stretching roller; 13-guide pressing roller; 14-bundling roller; 15-plasticizer spraying mechanism; 2-tow bracket; 3-cigarette tongue; 4-forming device; 41-steam section; 411-steam pressure plate; 412-steam hole; 413-steam outlet line; 414-steam outlet hole; 42-cooling section; 43-refrigerator; 5-filter rod. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0034] Example 1

[0035] like Figure 5 As shown, this embodiment provides a KDFM-NWT hollow filter rod forming machine filter rod forming device, including: a steam section 41 and a cooling section 42, the steam section 41 includes a steam pressure plate 411, a steam generator, a superheater, a temperature controller and a steam supply pipeline, the temperature controller is connected to the steam generator circuit, 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 disconnected, which prevents the heater therein from dry burning and overheating, prolongs the service life of the heating rod, and enhances the safety of equipment and personnel. The steam pressure plate 411 is divided into an upper steam pressure plate and a lower steam pressure plate. After the upper steam pressure plate and the lower steam pressure plate are closed, the smoke delivery grooves on the two are enclosed to form a smoke delivery channel, and the hollow filament bundle passing through the core rod 31 is heated by steam when entering the smoke delivery channel.

[0036] like Figure 6 As shown in (a) and (b), the steam platen 411 is provided with eight steam holes 412, namely B81N, B82N, B83N, B84N, B85N, B86N, B87N and B88N. Among them, when the production speed is 360m / min, three steam holes 412, namely B81N, B82N and B84N, are used. After the speed is increased, the exhaust of the original three steam holes 412 causes the hardness to fail to meet the standard, and a quality defect of product bending will occur. Therefore, the exhaust steam holes 412 are changed to B81N, B82N, B84N and B86N, so that the product hardness index meets the process standard.

[0037] The original steam outlet line 413 of the steam pressure plate 411 has an air volume of 0.02m3 / s. After the speed is increased, it is not enough to ensure the formation of the filter rod, and the hardness of the filter rod does not meet the standard. Therefore, the steam outlet line 413 in the smoke delivery groove of the steam pressure plate 411 is changed to a steam outlet hole 414. The steam outlet hole 414 is composed of three sub-steam outlet holes evenly distributed along the circumference of the smoke delivery groove, and the air volume is 0.06m3 / s to ensure the hardness of the filter rod. The steam pressure plate 411 is composed of two parts, the upper and lower parts. The steam is sprayed from the steam outlet hole 414 of the upper steam pressure plate to the filter rod 6, and is discharged from the steam outlet hole 414 on the lower steam pressure plate, forming a top-in and bottom-out jet form. After the speed is increased, the steam volume is large, and water vapor condensation products will be produced after the steam contacts the filter rod. The gas supply volume is sometimes not stable during the gas supply process. When the gas supply is too much, it needs to be discharged. During the discharge process, the water vapor condensation products will be discharged together. However, the water vapor condensation products may not be discharged smoothly, resulting in the blockage of the steam outlet hole 414 of the lower steam pressure plate. Therefore, if Figure 7 As shown, the steam outlet hole 414 is arranged to be inclined toward the filter rod, and the slope is 5°, so that the condensation products of water vapor can be discharged.

[0038] like Figure 8 As shown, the cooling section 42 includes a cooling platen, a refrigerator 43 and a cooling pipeline. The upper and lower cooling plates are combined to form a smoke passage. After the refrigerator 43 cools the cooling air at room temperature to 8°C, it is released to the cooling platen through the cooling pipeline and blown out from the cooling holes on the cooling platen to act on the filter rod 6, thereby cooling the filter rod 6. There are two cooling pipelines, which are respectively controlled by the Y230N air valve and the Y231N air valve. The opening of the Y230N air valve in the cooling section is 30% to 34% (originally 38%), and the opening of the Y231N air valve is 23% to 26% (originally 30%). Compared with the original cooling section, the refrigerator 43 is installed to reduce the cooling air temperature, and at the same time, the opening of the Y230N air valve and the Y231N air valve is adjusted downward, which ensures the hardness of the filter rod 6 while reducing the consumption of compressed air.

[0039] The utility model can effectively improve the hardness of the filter rod by improving the forming device 4, thereby avoiding the situation where the circumference and the roundness of the hollow part do not meet the standards due to insufficient hardness during subsequent cutting and storage, thereby ensuring that the roundness of the filter rod finally produced meets the design indicators.

[0040] The hardness of the hollow filter rods before and after the improvement was tested, and the test data is shown in the following table:

[0041]

[0042] It can be seen from the above table that the hollow filter rods produced by the improved molding device at production speeds of 450m / min and 500m / min have hardness that meets the requirements.

[0043] Example 2

[0044] like Fig. 9 As shown, on the basis of Example 1, the steam outlet hole 414 is composed of five sub-steam outlet holes distributed in an X shape. The X-shaped distributed distribution structure can help to evenly disperse the steam on the filter rod 5, thereby ensuring the quality of filter rod molding.

[0045] 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 KDFM-NWT hollow filter rod forming machine filter rod forming device, comprising a steam section and a cooling section. The filter rod is heated in the steam section and then sent to the cooling section for cooling and shaping. The steam section comprises: A steam pressure plate and a steam generator, characterized in that: The steam section superheater temperature is 170-180°C, the steam section steam pressure 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 pressure plate; The cooling section is provided with a refrigerator, and the refrigerator is connected to the cooling section through a cooling pipeline; there are two cooling pipelines, which are respectively controlled by a Y230N gas valve and a Y231N gas valve, the opening of the Y230N gas valve is 30% to 34%, and the opening of the Y231N gas valve is 23% to 26%.

2. The KDFM-NWT hollow filter rod forming machine filter rod forming device according to claim 1, characterized in that: The steam outlet hole is inclined toward the filter rod, and the angle between the steam outlet hole and the bottom surface of the smoke delivery groove is 5°.

3. The KDFM-NWT hollow filter rod forming machine filter rod forming device according to claim 1, characterized in that: The steam outlet holes are arranged in a plurality of groups, and each group includes a plurality of sub-steam outlet holes.

4. The KDFM-NWT hollow filter rod forming machine filter rod forming device as claimed in claim 3, characterized in that: Each group of steam outlet holes comprises three sub-steam outlet holes evenly distributed along the circumference of the smoke delivery groove.

5. The KDFM-NWT hollow filter rod forming machine filter rod forming device as claimed in claim 3, characterized in that: Each group of steam outlet holes includes five sub-steam outlet holes distributed in an X shape.

6. The KDFM-NWT hollow filter rod forming machine filter rod forming device according to claim 1, characterized in that: The cooling air temperature output by the refrigerator is 8°C.

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