Pre-closing device

Abstract

The utility model discloses a pre-closing device which comprises two symmetrically arranged closing pieces, and the two closing pieces are located at the inner end and the outer end of a converging drum respectively and used for closing two cigarettes on the converging drum towards a filter stick in the middle. According to the device, a physical blocking mode is adopted, so that the phenomenon that tobacco powder splashes at the confluence drum is greatly reduced, the purpose of reducing tobacco powder included in tipping paper is achieved, meanwhile, flying-out of tobacco shreds at the end of a cigarette can be effectively reduced, the filling amount of the tobacco shreds of the cigarette is guaranteed, and then the quality of the cigarette is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of filter tip assembling machines, in particular to a pre-approaching device used between a converging drum and an approaching drum of a filter tip assembling machine. Background Art

[0002] like Figure 1 As shown, the finished cigarette connecting process is to first cut the double-length cigarette into two single-length cigarettes by the first slitting circular knife, separate them at a certain distance by the separation drum, and then connect a double-length filter tip between the two single-length cigarettes at the converging drum. After being aligned by the approaching drum, they are wrapped with latex-coated kraft paper and twisted into double-length filter tip cigarettes. The double-length filter tip cigarette is cut by the second slitting circular knife to form two single-length filter tip cigarettes, i.e. the final finished cigarette. When the single-length cigarette and the double-length filter tip are at the converging drum, the tobacco at the end of the single-length cigarette is affected by the centrifugal force due to the rotation of the converging drum, and the falling tobacco foam flies between the approaching drum and the washboard, eventually leading to the formation of cigarettes sandwiched with kraft paper foam.

[0003] At present, the main methods of removing droplets are blowing removal and suction removal. The main idea of ​​blowing removal is to blow the tobacco out of the equipment through compressed air between the kraft paper cutter and the approaching drum. However, the blowing method may cause the junction position of the kraft paper to shift and the kraft paper to fold.

[0004] Suction cleaning is to use negative pressure suction between the converging drum and the approaching drum to suck away the tobacco shreds and cigarette dust, such as disclosed in Chinese patent applications CN112931926A and CN103720027A. However, such suction devices are limited by the space between the approaching drum and the converging drum, and their range of action is relatively small, and they cannot clean the droplets generated after passing through the suction devices.

[0005] Based on this, a device that can effectively reduce droplets is needed. Utility Model Content

[0006] In view of the above problems, the utility model provides a pre-closing device, which can effectively reduce splashes and ensure the quality of cigarettes.

[0007] Specifically, the utility model provides a pre-approaching device, comprising:

[0008] There are two folding pieces symmetrically arranged, and the two folding pieces are respectively located at the inner and outer ends of the merging drum, and are used to fold the two cigarettes on the merging drum toward the filter rod in the middle.

[0009] Furthermore, the gathering member is an arc-shaped gathering plate, and a gradually gathering channel is formed between the two gathering plates, so that the two cigarettes on the converging drum are gathered toward the filter rod in the middle.

[0010] Furthermore, the two folding plates are configured with an adjustable spacing.

[0011] Furthermore, the pre-approaching device further comprises:

[0012] A positioning seat is arranged below the converging drum, and the gathering member is mounted on the positioning seat through a gathering bracket;

[0013] The smoke guiding plate is located between the two gathering members, is arc-shaped as a whole, and is concentric with the converging drum.

[0014] Furthermore, the central angle of the folding plate is greater than 60°.

[0015] Working principle:

[0016] After the cigarettes and filter rods are transported to the merging drum 6 (the middle is a double-length filter rod 82, and the inner and outer ends are single-length cigarettes 81), the merging drum 6 rotates clockwise to drive the filter rods and cigarettes to move toward the closing drum 7. When moving to the closing member, the cigarettes at both ends gradually close inward under the guidance of the closing member. During this process, the outer ends are blocked by the closing member to prevent the tobacco shreds at the outer ends from falling off. At the same time, the cigarettes at the inner and outer ends close to the middle filter rod, and the filter rod can be used to block the inner end of the cigarette to prevent the tobacco shreds at the inner end from falling off. During the closing process, the cigarette guide plate 4 is used to support the cigarette to a certain extent to prevent the cigarette from falling off from the merging drum 6. The closed cigarettes and filter rods form a cigarette group, which is finally transported to the closing drum 7.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) The device provided by the utility model adopts a physical blocking method to greatly reduce the splashing phenomenon of smoke foam at the converging drum, thereby achieving the purpose of reducing the foam trapped in the kraft paper.

[0019] (2) It can effectively reduce the flying of tobacco at the end of the cigarette, ensure the filling amount of tobacco in the cigarette, and further ensure the quality of the cigarette. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a flow chart for cigarette production;

[0021] Figure 2 is a schematic structural diagram of the pre-approaching device in Example 1;

[0022] Figure 3 is an exploded view of the pre-closing device in Example 1;

[0023] Figure 4 is a side view of the pre-closing device in Example 1;

[0024] Figure 5 This is a bottom view of the pre-closing device in Example 1 in use;

[0025] Figure 6 Schematic diagram of the usage state of the pre-approaching device in Embodiment 1;

[0026] Figure 7 Schematic diagram of the principle of the pre-approaching device in Embodiment 1.

[0027] Reference numerals:

[0028] 1 - positioning seat; 2 - folding bracket; 3 - folding plate; 31 - folding section; 32 - holding section; 4 - cigarette guiding plate; 41 - cigarette guiding plate bracket; 5 - folding adjustment shaft; 51 - screw; 6 - converging drum; 7 - approaching drum; 81 - single-length cigarette; 82 - double-length filter tip. Detailed implementation manners

[0029] The present utility model will be further described in detail below in conjunction with the accompanying drawings through specific implementation manners.

[0030] Embodiment 1

[0031] As Figure 2-3 shown, this embodiment provides a pre-approaching device, including: a positioning seat 1, a folding plate 3 and a cigarette guiding plate 4. The positioning seat 1 is made of 45# steel and is fixed on the flat plate of the machine support frame below the left of the converging drum 6 through M8 bolts, specifically between the 6 o'clock and 9 o'clock directions. The folding plate 3 is installed on the positioning seat 1 through a folding bracket 2. The folding bracket 2 is in an overall shape of "⊥", and there are waist-shaped holes on its bottom plate, so that the distance between the two folding plates 3 can be adjusted.

[0032] The folding plate 3 is fixed to the top of the folding bracket 2. Its overall shape is an arc shape made of 304 stainless steel and concentric with the converging drum 6. It is composed of a folding section 31 and a holding section 32. The folding section 31 is in a shape that gradually narrows along the rotation direction of the converging drum 6. A folding channel is formed between the two folding sections 31. The distance at the entrance of the folding channel is 178 mm, and the distance at the exit is 168 mm. As Figure 5-7As shown, after the single-length cigarette 81 and the double-length filter 82 are conveyed to the merging drum 6, the clockwise rotating merging drum drives the double-length filter 82 and the single-length cigarette 81 to move toward the closing drum. When moving to the closing section 31, the single-length cigarettes 81 at both ends are gradually closed inwardly under the guidance of the closing section 31, and the closing distance is 6mm (that is, a single cigarette moves inwardly by 3mm). During this process, the outer end of the single-length cigarette 81 is blocked by the closing section 31 to prevent the tobacco shreds at the outer end of the single-length cigarette 81 from falling off. At the same time, the single-length cigarettes 81 at the inner and outer ends are closed to the double-length filter 82 in the middle, and the double-length filter 82 can be used to block the inner end of the single-length cigarette 81 to prevent the tobacco shreds at the inner end from falling off. After being folded into place, it enters the holding section 32 and keeps the outer end of the single-length cigarette 81 blocked until it reaches the junction of the merging drum 6 and the approaching drum 7.

[0033] A screw rod 51 is provided on the inner wall of the folding bracket 2, and the two screw rods 51 are connected by a folding adjustment shaft 5. The screw holes at both ends of the folding adjustment shaft 5 have reverse threads, that is, one end is a right-handed thread and the other end is a left-handed thread. When the screw rod 51 rotates clockwise or counterclockwise, the two folding brackets 2 can be moved to expand or contract, so as to achieve the effect of fine-tuning the spacing.

[0034] Table 1 Statistics of defects of tipping paper clips and wrinkled cigarettes in the production of brand A:

[0035]

[0036] It can be seen from the above table that in the three batches using the device, the number of cigarettes with cork paper clips decreased significantly, which was better than the three batches without the device.

[0037] Given that the gathering distance is 3 mm, it is necessary to study the gradual gathering process and analyze its effect on cigarette wrinkles. When the outer dimensions of the gathering plate 3 correspond to 1 groove, 2 grooves, and 3 grooves of the converging drum 6, a gathering plate 3 model is made to test its effect on cigarette wrinkles and collect data. The results are shown in Table 2.

[0038] Table 2 Statistics on the influence of different dimensions of the gathering plate on cigarette wrinkles

[0039] Number of corresponding drum grooves Number of crinkled cigarettes per 1000 pieces Defect rate 1 10 1.0％ 2 6 0.6％ 3 4 0.4％

[0040] When the gathering plate 3 corresponds to only one drum groove, wrinkles on the cigarettes are easily generated due to too fast gathering. Before the cigarette group is handed over, the slower the transition of the outer dimensions of the working surface of the gathering plate 3 is, the smoother the gathering process is, and the generation of wrinkles on the cigarettes can be avoided. Therefore, to avoid the generation of wrinkles on the cigarettes, the outer dimensions of the working surface of the gathering plate 3 are at least larger than three drum grooves, that is, the central angle thereof is larger than 60°, which is 65.34° in this embodiment.

[0041] The cigarette guiding plate 4 is fixed on the positioning seat 1 through the cigarette guiding plate bracket 41, and is integrally made of 304 stainless steel. The cigarette guiding plate 4 is coaxial with the converging drum 6, and its radius = the radius of the converging drum + half of the cigarette rod diameter + 0.2 mm, so as to support the cigarette group (composed of 2 single-length cigarette rods 81 and 1 double-length filter tip 82) converged on the converging drum 6, and avoid the situation of the cigarette group falling off.

[0042] The above uses specific examples to elaborate on the present utility model, which is only used to help understand the present utility model and is not intended to limit the present utility model. For those skilled in the technical field to which the present utility model belongs, according to the idea of the present utility model, several simple deductions, deformations or substitutions can also be made.

Claims

1. A pre-approaching device, characterized in that: include: Two folding pieces are symmetrically arranged. The two folding pieces are respectively located at the inner and outer ends of the merging drum (6) and are used to fold the two cigarettes on the merging drum (6) toward the filter rod in the middle.

2. The pre-closing device according to claim 1, characterized in that: The gathering member is an arc-shaped gathering plate (3), and a gradually gathering channel is formed between the two gathering plates (3), so that the two cigarettes on the converging drum (6) are gathered towards the filter rod in the middle.

3. The pre-closing device according to claim 2, characterized in that: The two folding plates (3) are arranged so that the distance between them can be adjusted.

4. The pre-approaching device according to claim 1, characterized in that: Also includes: A positioning seat (1) is arranged below the converging drum (6), and the gathering member is mounted on the positioning seat (1) via a gathering bracket (2); The smoke guiding plate (4) is arranged on the positioning seat (1) and is located between the two gathering members. The smoke guiding plate (4) is in an arc shape as a whole and is concentric with the converging drum (6).

5. The pre-closing device according to claim 2, characterized in that: The central angle of the gathering plate (3) is greater than 60°.

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