CN212260460U

CN212260460U - Filter stick without wrapping paper and with continuous closed cavity

Info

Publication number: CN212260460U
Application number: CN202020310545.3U
Authority: CN
Inventors: 黄杨; 罗亮; 孙庆杰; 周成喜; 金强
Original assignee: Nantong Cigarette Filter Co Ltd
Current assignee: Nantong Cigarette Filter Co Ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2021-01-01
Anticipated expiration: 2030-03-13

Abstract

The utility model discloses a filter stick without wrapping paper with a continuous closed cavity, which is internally arranged with 2 to several closed cavities which are continuously arranged and independent from each other along the axis of the filter stick. The forming device comprises a forming cigarette gun and a forming core rod, wherein the forming cigarette gun is provided with a steam shaping section and a cooling and solidifying section. The utility model provides a cavity has the efficiency of cooling and falling burnt to the flue gas, compares in traditional cavity composite filter rod, need not use the plug wrap, has great competition advantage in aspects such as cost, efficiency.

Description

Filter stick without wrapping paper and with continuous closed cavity

Technical Field

The utility model relates to a structure of a filter stick.

Background

The general filter stick is formed by wrapping a filter element with forming paper, and the filter element which is made of denser material and has higher hardness can be directly formed into a filter stick without wrapping the filter element with the forming paper; some filter cartridges have axial through holes therein and some filter cartridges have individual closed holes therein.

The invention with the patent application number of 2017102833121 discloses a composite filter stick with a through type conical cavity structure, which comprises a stick body, wherein the stick body is cylindrical, a cavity is arranged in the stick body, the cavity is horn-shaped, namely, along the central axis direction of the stick body, two ends of the cavity are open, the circumferential size of the opening at one end is always larger than that of the opening at the other end, and the stick bodies are detachably connected. The filter stick adopts the axial through hole, and the filtering effect of the through hole on smoke is weakened.

A transparent cavity type quinary composite filter stick with two kinds of functional particles added into a cavity of 2018200177325 relates to a filter stick for manufacturing a cigarette filter, wherein a cavity section (4) interval is arranged between functional filter stick sections (3), functional particles (5) are arranged in the cavity section (4), and an outer wrapping layer (1) wraps an inner wrapping layer (2) and connects the filter stick sections together. Although the core part of the invention is not provided with the through hole, the core part adopts the composite filter stick structure with the interval between the solid core and the hollow core, so that more manufacturing procedures are needed, and the production cost is higher.

The invention with the patent application number of 2018104063116 discloses a forming device for a paperless coaxial core filter stick, which is provided with two groups of parallel tow conveying mechanisms, a combined opening mechanism, an inner layer paperless wrapped filter stick curing and shaping mechanism, an outer layer paperless wrapped filter stick curing and shaping and composite forming mechanism and a leading-out mechanism. The inner-layer paperless wrapped filter stick curing and shaping mechanism heats the inner-layer tows by steam to prepare a paperless wrapped inner-core filter stick; then the outer layer is heated and shaped by steam. The invention introduces the forming technology of the filter stick without the paper bag, and can be used for reference.

Disclosure of Invention

Utility model purpose:

the outer-wrapping-free paper filter stick with the continuous closed cavity is provided, the inner cavity is favorable for cooling and reducing tar, the capsule can be directly embedded, and good filtering capacity can be maintained without penetration.

The technical scheme is as follows:

the filter stick without the wrapping paper adopts acetate fibers and a thermosetting adhesive as raw materials (the adhesive is added into the middle tows in a liquid state before the tows enter a forming cigarette gun after being opened, and is firstly plasticized and deformed and then heated, cured and shaped when being heated), and a structure from 2 to a plurality of independent closed cavities which are continuously arranged along the axial lead is arranged inside the filter stick.

The closed cavities are in an ellipsoidal shape, the structure size of each cavity of the filter stick can be adjusted and controlled, the length L of each cavity in the axial direction is larger than the diameter in the radial direction, and the diameter D in the radial direction is about 1/3-2/3 of the diameter of the filter stick. The diameter D ranges from 1 mm to 5.5mm, and the length L ranges from 5mm to 20 mm.

The axial distance between the adjacent cavities is about the diameter of the filter stick, so that the smoke has better filtering capacity and lower suction resistance when passing through.

Preferably, one or several capsules, in which a liquid or solid flavour substance or a filter or adsorbent material is placed, are placed in each closed cavity.

The placing method can be that the inside of the forming core rod is provided with a hollow flow channel, particles are added from the head part and released into the cavity from the opening of the tail part, and compressed gas can be configured at the inlet of the flow channel to be used as power to blow in the capsule and blow out the capsule.

This former of no outsourcing paper filter rod:

the forming equipment used for feeding the filter stick product comprises a forming core rod, a driving mechanism for controlling the forming core rod to reciprocate and a forming smoke gun. The inside of the forming cigarette gun is provided with a filter stick forming cavity, when the forming cigarette gun is used, the forming core rod enters the forming cavity from a tow inlet of the cigarette gun, and the part entering the forming cavity can move back and forth in the forming cavity in a reciprocating mode (tows continuously enter, the core rod can move forward and insert into the tows, and can also move back and not insert into the tows but keep below the tows).

The shaping cigarette gun is sequentially provided with a steam shaping section and a cooling and solidifying section from the entering position of the tows.

The length of the part of the forming core rod in the forming cavity is not more than that of the steam shaping section, and the diameter from the head to the tail of the forming core rod is gradually reduced when seen from the entering position of the filament bundle.

The steam shaping section is provided with a steam heating pipeline, can heat the shell of the shaping cigarette gun and then transfers heat to the tows in the inner shaping cavity of the shaping cigarette gun.

When a forming core rod is inserted into the filament bundle, the filament bundle is heated, the filament bundle is restrained by the core rod and a cigarette gun together, an adhesive therein is melted at high temperature for shaping the filament bundle to form a hollow cavity with a hollow structure and shaping, and after the forming core rod is pulled out, the shape of the core rod is kept in the filament bundle to form a cavity section.

The cooling and solidifying section is provided with a cold air inlet pipeline which can cool the outer shell of the cigarette gun and transfer cold energy to the tows in the forming cavity inside the cigarette gun.

When the tows continue to move forward through the steam shaping section, the forming core rod is pulled out at the moment, the tows containing the cavity move forward to the cooling and solidifying section, and the cavity in the tows is further solidified and is not easy to deform.

When the molding core rod exits (only exits from the steam shaping section), the tows entering subsequently have basically no gaps and do not form cavities, and the tows without the gaps form a compact section when entering the steam shaping section and the cooling and solidifying section in sequence.

The subsequent filament bundles can form a filter core or a filter stick without paper package, wherein the filter core or the filter stick is provided with a plurality of cavity sections and dense sections which are alternated, under the common constraint of the forming core rod and the forming cavity which repeatedly advance and retreat.

Be provided with the cold air jet orifice of one (or a plurality of circumference equipartitions) UNICOM shaping chamber on the shell of preferred cooling solidification section, let compressed cold air can get into the shaping chamber, produce great radial pressure of blowing to the silk bundle through this hole department, make the silk bundle of this department in the refrigerated while, further shrink and form the core structure of complete compactness (offset the remaining space after the shaping plug is extracted), the silk bundle can contract completely and cool off and condense together, form the closely knit section of complete closure.

Preferably, the cold air injection holes and the advancing direction of the tows form an acute angle smaller than 90 degrees (the tows advance at a certain speed, and the resultant direction of the cold air injected by the acute angle is closer to being vertical to the tows, so that the combination of the compact sections is more symmetrical, and the shapes of the cavity sections and the compact sections formed in the compact sections are more perfect.

Has the advantages that:

the cavity structure of the filter stick has the effects of cooling and reducing tar for smoke, and has wide application prospect on the traditional cigarettes and novel non-burning heating cigarettes. Meanwhile, the cavity is used as a carrier, and particles and capsules can be added into the cavity, so that more functionality is given to the cavity. Meanwhile, compared with the traditional cavity composite filter stick, the composite filter stick does not need a composite process, does not need high-quantitative forming paper and an adhesive, and has great advantages in the aspects of cost and efficiency. The production cost of the cavity composite filter stick is reduced, the size of the cavity is adjustable and controllable, and the filter sticks with various specifications can be manufactured.

Drawings

FIG. 1 is a sectional view of the present invention;

fig. 2 is a schematic cross-sectional view of an apparatus according to the present invention;

fig. 3 is a schematic structural view of a forming mandrel according to the present invention;

in the figure, 1-closed cavity; 2-a dense section; 3 cavity radial diameter; 4-axial length of cavity.

Detailed Description

As shown in figure 1, the filter stick without the wrapping paper and provided with the continuous closed cavities adopts acetate fibers and thermosetting adhesive as main raw materials, and has a structure with 4 closed cavities which are continuously arranged along an axial lead and are independent from each other in the filter stick;

the length of the cavity in the axial direction is larger than that in the radial direction, and the size of the cavity in the radial direction is about 1/3-2/3 of the diameter of the filter stick.

The diameter D range of each cavity is 3-5 mm, and the length L range is 10-15 mm.

The equipment for forming the filter stick shown in figure 2 comprises a forming core rod, a driving mechanism for controlling the reciprocating advance and retreat of the forming core rod and a forming smoke gun; the inside of the forming cigarette gun is provided with a filter stick forming cavity, when in use, the forming core rod enters the forming cavity from the inlet of the filament bundle, and the part entering the forming cavity can move back and forth in the forming cavity; the shaping cigarette gun is sequentially provided with a steam shaping section and a cooling and solidifying section from the entering position of the tows; the length of the part of the forming core rod in the forming cavity is not more than the length of the steam shaping section.

The steam shaping section is provided with a steam heating pipeline which can heat the shell of the shaping cigarette gun and then transfer heat to the tows in the inner shaping cavity of the shaping cigarette gun; the cooling solidification section is provided with a cold air inlet pipeline, and the cold air can cool the outer shell of the cigarette gun and transfer cold energy to the tows in the forming cavity in the cigarette gun.

The forming mandrel shown in fig. 3 has a gradually decreasing diameter from the head to the tail.

Claims

1. A filter stick without wrapping paper with a continuous closed cavity adopts acetate fiber and thermosetting adhesive as main raw materials, and is characterized in that: the filter stick is internally provided with a structure of 2 to a plurality of closed cavities which are continuously arranged along the axial lead and are independent from each other;

2. A wrapper-free filter rod with a continuous closed cavity according to claim 1, wherein: the diameter D range of each closed cavity is 1-5.5 mm, and the length L range is 5-20 mm.

3. A filter rod without wrapper having a continuous closed cavity according to claim 1 or 2, wherein: one or more capsules are placed in each closed cavity, and liquid or solid flavor substances or filtering substances or adsorbing materials are contained in the capsules.