CN107927903B - A membrane-like uniform folding mechanism - Google Patents

Abstract

The invention discloses a film uniform folding mechanism, in particular relates to a film uniform folding mechanism arranged on a filter rod forming machine, and belongs to the technical field of rod forming in the tobacco industry. The folding mechanism is a cone cylinder body with two ends open and uniformly transited, the inlet at the front end is elliptical, the outlet at the rear end is circular, the width of the major axis of the ellipse of the inlet is 40-70% of the bandwidth of the film, and the diameter of the outlet is 1.5-4 times of the diameter of the formed filter stick. The folding mechanism provided by the invention has the advantages of simple structure, easiness in manufacturing and installation, reasonable size parameters of the folding cone, capability of gradually folding the film in a natural state, and capability of obtaining the best folding uniformity so far, thereby ensuring that the electric heating non-combustion cigarette filter stick can enter stable batch production.

Description

A membrane-like uniform folding mechanism

Technical Field

The invention belongs to the technical field of rod forming in the tobacco industry, in particular to a membrane-like object uniformly gathering mechanism arranged on a filter rod forming machine.

Background Art

As people's environmental awareness increases, tobacco industries around the world have begun to use polylactic acid materials (PLA) when preparing cigarette filter rods, especially in the electric heating cigarettes developed in the past one or two years, almost all of which use polylactic acid films, because cigarette filter rods prepared with polylactic acid films are closer to traditional cigarettes in terms of suction effect. However, the physical properties of polylactic acid films are relatively hard and lack flexibility, and the uniformity of the cigarette filter rods formed by folding is poor, resulting in great differences in the suction effect of each cigarette, which seriously affects the promotion of electric heating cigarettes in the market. Therefore, solving the problem of uniformity of polylactic acid films after folding has become one of the major issues that the tobacco industry around the world urgently needs to solve.

Summary of the invention

The object of the present invention is to provide a film-like material uniformly gathering mechanism on a filter rod forming machine, which has a simple structure, is easy to manufacture and install, and can effectively make the film-like filter material uniformly gathered into a rod shape.

The technical solution adopted to solve the above technical problems of the present invention is: the folding mechanism is a conical cylinder with even transition and openings at both ends, the front end inlet is elliptical, the rear end outlet is circular, and the major axis width of the ellipse at the inlet is 40-70% of the film bandwidth, and the diameter of the outlet is 1.5-4 times the diameter of the formed filter rod.

For polylactic acid film, the taper of the gathering mechanism is 2.5-7.7°, the major axis of the ellipse at the inlet is 200-300 mm, the minor axis of the ellipse is 20-50 mm, and the diameter of the outlet is 11.5-30 mm.

The beneficial effect of the present invention is that by adopting an elliptical inlet and matching reasonable folding cone size parameters, the polylactic acid film can be gradually folded and folded in a natural state, and the best folding uniformity is obtained in the process so far, thereby ensuring that the electric heating non-burning cigarette filter rod can enter mass production.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: gathering bundle 1, outlet 2, cone 3, inlet 4, film 5.

DETAILED DESCRIPTION

Referring to Fig. 1, the folding mechanism of the present invention is a cone 3 with both ends open and uniformly transitioned, the front inlet 4 of the cone is elliptical, the rear outlet 2 of the cone is circular, and the ellipse major axis width of the inlet 4 is 40-70% of the original bandwidth of the film 5, and the diameter of the outlet 2 is 1.5-4 times the diameter of the formed filter rod. For polylactic acid film, the cone 3 of the folding mechanism has a taper of 2.5-7.7°, the ellipse major axis of the inlet 4 is 200-300 mm, the ellipse minor axis is 20-50 mm, and the diameter of the outlet 2 is 11.5-30 mm.

After the polylactic acid film is gathered by the gathering mechanism to obtain a polylactic acid filter rod, the pore size and distribution of the cross section of the filter rod are relatively uniform, and the diameter ratio of the largest pore to the smallest pore is less than 4.

Claims (1)

1. A uniform gathering mechanism for membrane-like objects, characterized in that: the gathering mechanism is a conical cylinder with uniform transition and openings at both ends, the front inlet is elliptical, the rear outlet is circular, and the major axis width of the inlet ellipse is 40-70% of the film bandwidth, and the outlet diameter is 1.5-4 times the diameter of the formed filter rod; the conical cylinder taper of the gathering mechanism is 2.5-7.7°, the major axis of the inlet ellipse is 200-300 mm, the minor axis of the ellipse is 20-50 mm, and the outlet diameter is 11.5-30 mm.