Sealing soldering iron and forming structure of KDF3 filter stick forming machine

Abstract

The utility model discloses a KDF3 filter stick forming machine sealing soldering iron and a forming structure, the forming structure comprises a pressing plate section and a sealing soldering iron section, the sealing soldering iron section comprises a sealing soldering iron, the bottom of the sealing soldering iron is provided with an arc-shaped groove, the arc-shaped groove is arranged in a straight line shape along the filter strip conveying direction, the inlet end of the arc-shaped groove is in butt joint with a pressing plate, and the working face of the arc-shaped groove is a smooth arc. The forming structure effectively solves the problems that wrapping of the cloth belt is loose and the running track of the cloth belt is interfered, the consistency of the conveying channel is better, and the stability of the circumferential quality of the filter stick can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filter rod forming machines, in particular to a sealing iron and a forming structure of a filter rod forming machine. Background Art

[0002] In the production of cigarette filter rods, first, the tow is unfolded by a carding machine and plasticizer is sprayed, and then it is conveyed to a forming machine. The tow band processed by the carding machine is wrapped with filter paper and formed according to the specified requirements. During the forming process, filter paper is wrapped and sealing glue (hot melt adhesive) is applied, and then it is quickly cooled at a low temperature to bond and form the filter rod. A sealing iron is provided at the front end of the sealer of the KDF3 fiber filter rod forming machine, which mainly plays the role of heating and keeping the sealing glue warm before the filter strip is shaped and guiding the forming of the filter strip, and finally defining the shape and size of the filter strip.

[0003] The current forming structure is as Figure 1 shown, which includes a pressing plate section 1 and a sealing iron section 2a. As Figure 2 shown, the sealing iron section 2a consists of two sections. The front section is a quarter trumpet-shaped opening 21a, which is used to cooperate with the pressing plate to wrap the filter strip 3. The rear section is a straight arc-shaped groove 22a, which cooperates with the cigarette gun groove plate 4 to realize the sizing of the filter strip 3. As Figure 3 shown, the straight arc-shaped groove 22a is provided with a step 23a, the purpose of which is to hide the cloth tape 31 and avoid the edge of the cloth tape pressing on the filter strip 3 to form indentations.

[0004] During use, when the filter strip 3 enters the butt joint of the trumpet-shaped opening 21a of the sealing iron and the pressing plate for forming, due to the existence of the trumpet-shaped opening 21a, the space suddenly becomes larger, and the cloth tape 31 is loosely wrapped, resulting in unstable circumferences of the filter rods. When adjusting the diameter of the filter rod, as the sealing iron rotates, the step 23a presses down on the cloth tape 31, interfering with the running track of the cloth tape 31 and also affecting the stability of the circumference of the filter rod.

[0005] Therefore, it is necessary to improve the existing sealing iron to solve the above problems. Summary of the Utility Model

[0006] In view of the above problems, the utility model provides a sealing iron and a forming structure of a KDF3 filter rod forming machine, which can ensure the consistency of the space size of the entire filter strip wrapping and forming channel, thereby improving the stability of the filter rod circumference quality.

[0007] Specifically, the utility model provides a sealing iron of a KDF3 filter rod forming machine. An arc-shaped groove is provided at the bottom of the sealing iron. The arc-shaped groove is arranged in a straight line along the filter strip conveying direction. Its inlet end is butted with the pressing plate section, and the working surface of the arc-shaped groove is a smooth arc.

[0008] Furthermore, the length of the arc-shaped groove is 60.9 mm.

[0009] Furthermore, a heating rod is provided inside the sealing soldering iron, and the heating rod is used to heat and keep warm the sealing glue on the filter rod.

[0010] The present utility model also provides a filter rod forming structure for a KDF3 filter rod forming machine, which includes a pressing plate section and a sealing soldering iron section, and the sealing soldering iron section includes the sealing soldering iron as described above.

[0011] Furthermore, the pressing plate section includes an outer folding plate and an inner folding plate. The outer folding plate and the inner folding plate are respectively located on both sides of the conveying channel. An extension plate is provided on the outer folding plate. The extension plate is located above the conveying channel and extends towards the inner folding plate side and partially overlaps with the inner folding plate.

[0012] Working principle:

[0013] When the filter rod 3 wrapped by the cloth belt 31 passes through the pressing plate section 1, it is formed in a section in the conveying channel jointly surrounded by the cigarette gun groove plate 4, the inner folding plate 12 and the outer folding plate 11. Then, the filter rod 3 is continuously connected and enters the arc-shaped groove 21b at the bottom of the sealing soldering iron, and is formed in a second section by the arc-shaped groove 21b, which can effectively avoid the problem of unstable circumferential quality of the filter rod caused by inconsistent connection. After the filter rod 3 enters the arc-shaped groove 21b, the sealing soldering iron is aligned for heating and heat preservation to avoid the cooling of the sealing glue. The filter rod 3 passing through the sealing soldering iron is sent into the sealer for cooling and sealing.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] (1) The sealing soldering iron and forming structure provided by the present utility model change the two-stage forming of the original sealing soldering iron section to one-stage forming, avoiding the problem of unstable circumferential quality of the filter rod caused by inconsistent connection due to multiple forming stages.

[0016] (2) By adopting a smooth arc-shaped groove, the influence on the cloth belt is avoided, the stable running track of the cloth belt is ensured, and the stability of the filter rod circumference is further improved. Description of the drawings

[0017] Figure 1 is a schematic structural diagram of the forming structure of the existing KDF3 filter rod forming machine;

[0018] Figure 2 is a schematic structural diagram of the sealing soldering iron of the existing KDF3 filter rod forming machine;

[0019] Figure 3 is a cross-sectional view of the straight arc-shaped groove section of the sealing soldering iron of the existing KDF3 filter rod forming machine;

[0020] Figure 4 is a schematic structural diagram of the forming structure of the KDF3 filter rod forming machine in Embodiment 1;

[0021] Figure 5 It is a cross-sectional view of the pressing plate section in Embodiment 1;

[0022] Figure 6 It is a schematic structural diagram of the sealing iron of the KDF3 filter rod forming machine in Embodiment 1;

[0023] Figure 7 It is a cross-sectional view of the sealing iron section in Embodiment 1;

[0024] Figure 8 It is a schematic diagram of the working state of the existing sealing iron;

[0025] Figure 9 It is a schematic diagram of the working state of the sealing iron in Embodiment 1.

[0026] Reference numerals:

[0027] 1 - pressing plate section; 11 - outer folding plate; 12 - inner folding plate; 13 - extension plate; 2 - sealing iron section; 21a - bell mouth; 22a - straight arc groove; 23a - step; 21b - arc groove; 3 - filter strip; 31 - cloth belt; 4 - cigarette gun groove plate. Detailed implementation manners

[0028] The present utility model will be further described in detail below in conjunction with the accompanying drawings through specific implementation manners.

[0029] Embodiment 1

[0030] As Figure 4 shown, this embodiment provides a filter rod forming structure of a KDF3 filter rod forming machine, including a pressing plate section 1 and a sealing iron section 2. The pressing plate section 1 and the sealing iron section 2 are located above the cigarette gun groove plate 4, and together with the conveying groove of the cigarette gun groove plate 4, they enclose a conveying channel for the filter strip 3 (wrapped with a cloth belt 31), and shape the size of the filter strip 3 during the conveying process of the filter strip 3.

[0031] As Figures 5-6 shown, the pressing plate section 1 includes: an outer folding plate 11 and an inner folding plate 12. The inner folding plate 12 and the outer folding plate 11 are respectively located on both sides of the cigarette gun groove plate 4. An extension plate 13 is provided on the outer folding plate 11. The extension plate 13 is located above the conveying channel and extends towards the inner folding plate 12 side, and partially overlaps with the inner folding plate 12, so that the conveying channel of the pressing plate section 1 forms a complete circle. Compared with the existing pressing plate section structure with an opening part, when forming the filter strip 3, it can more effectively wrap the filter strip 3, reduce the fluctuation of the filter strip 3, ensure the consistency of the conveying channel of the pressing plate section 1, and thus improve the stability of the circumference of the filter strip 3 during the forming of this section.

[0032] The sealing soldering iron is provided with a heating rod inside and an arc-shaped groove 21b at the bottom. The arc-shaped groove 21b is arranged in a straight line along the filter strip conveying direction, with a length of 60.9 mm. Its inlet end is coherently connected to the pressing plate section 1, so as to achieve the consistency of the space size of the filter strip conveying channel from the pressing plate section 1 to the outlet of the sealing soldering iron section 2, which is more conducive to the stability of the filter rod circumference quality.

[0033] As Figure 7 shown, the working surface of the arc-shaped groove 21b is a smooth arc. Since the fiber tow auxiliary material itself has strong expansibility, it fills the traces caused by the compression of the cloth tape edge. Therefore, the original step is cancelled, and it will not cause indentation on the filter rod. At the same time, it avoids the step pressing the cloth tape 31, thus reducing the influence on the running track of the cloth tape, and further improving the stability of the filter rod circumference quality.

[0034] As Figures 8-9 shown, the sealing soldering iron and the forming structure provided by the present invention change the two-stage forming of the original sealing soldering iron section into one-stage forming, avoiding the problem that the connection is not coherent due to the large number of forming stages, resulting in unstable filter rod circumference quality. After the forming structure is put into use, the standard deviation sd value of the filter rod circumference is reduced by 24.3% (the smaller the sd value, the more stable the circumference size of this batch of filter rods), and the average value of the out-of-roundness is reduced by 16.5% (the difference between the maximum diameter and the minimum diameter is called the out-of-roundness, and the smaller the out-of-roundness data, the closer the filter rod is to a circle).

[0035] 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 belongs, according to the idea of the present invention, several simple deductions, deformations or substitutions can also be made.

Claims

1. A KDF3 filter rod forming machine sealing iron, characterized in that: An arc groove (21b) is provided at the bottom of the sealing soldering iron. The arc groove (21b) is arranged in a straight line along the conveying direction of the filter strip (3). Its inlet end is butted against the pressing plate section (1). The working surface of the arc groove (21b) is a smooth arc.

2. The KDF3 filter rod forming machine sealing iron as claimed in claim 1, characterized in that: The length of the arc-shaped groove (21b) is 60.9 mm.

3. The KDF3 filter rod forming machine sealing iron as claimed in claim 1, characterized in that: A heating rod is arranged inside the sealing soldering iron, and the heating rod is used to heat and keep warm the sealing glue on the filter strip (3).

4. A filter rod forming structure of a KDF3 filter rod forming machine, comprising a pressing plate section (1) and a sealing iron section (2), characterized in that: The sealing soldering iron section (2) comprises the sealing soldering iron as described in any one of claims 1 to 3.

5. The filter rod forming structure of the KDF3 filter rod forming machine according to claim 4, characterized in that: The pressure plate section (1) comprises: an outer folding plate (11) and an inner folding plate (12), wherein the outer folding plate (11) and the inner folding plate (12) are respectively located on both sides of the conveying channel, and an extension plate (13) is provided on the outer folding plate (11), wherein the extension plate (13) is located above the conveying channel and extends toward one side of the inner folding plate (12) and partially overlaps with the inner folding plate (12).

Images