DE29720015U1 - Hollow cylindrical sleeve body - Google Patents

Description

G 9308 EN

Shell factory Ed. Herbster

GmbH & Co. KG

Hohe-Flum-Strasse 58

79650 Schopfheim

Hollow cylindrical sleeve body

The invention relates to a hollow cylindrical sleeve body made of paper or another organic material.

Such sleeve bodies are used in particular as winding bodies for yarns, films, tapes and the like. For the transport of the finished containers on a pallet or the like, different layers of containers are separated from one another by horizontal intermediate layers, whereby the intermediate layers usually have punched, circular openings to accommodate the ends of the sleeve bodies in order to prevent the containers from slipping sideways. This type of packaging is very complex and expensive. Although stackable sleeve bodies are already known, they are conical in shape and can only be stacked when unwound.

The present invention is based on the object of creating a hollow cylindrical sleeve body that allows easy stacking of finished containers.

G 9308 EN - 2 -

The task is solved according to the invention by a hollow cylindrical sleeve body made of paper or another organic material in that it has a section with a reduced outer diameter at one end, whereby the outer diameter of this section is smaller than the inner diameter of the sleeve body at the opposite end. In this way, the sleeve bodies can be easily plugged into one another, whereby the length of the section with reduced diameter can be selected depending on the type of container and the desired stability of the connection. In a particularly stable design, the sleeve body can be flanged at its end with a reduced outer diameter. This creates a material reinforcement at this point, which is particularly stressed during stacking. The sleeve bodies according to the invention can also be used to produce and transport relatively high stacks of containers. The horizontal intermediate layers previously required can be partially or completely eliminated. To ensure the required horizontal distance between the individual containers, the sleeve bodies of the lowest containers can be fixed in the horizontal direction by a perforated plate or a plate provided with projections.

Different molding tools can be used to produce the sleeve bodies according to the invention. A first molding tool according to the invention is characterized by a pressing die with a mold recess corresponding to the contour of the section of reduced outer diameter of the sleeve body. Similar tools are already known for producing flanged edges on sleeves. A second molding tool according to the invention is characterized by a calibration mandrel for determining the inner diameter of the section of reduced outer diameter and a rotating tool head arranged coaxially to the calibration mandrel, which is equipped with several rollers which, when rolling on the outside of the sleeve body, bring about the diameter reduction. If the

G 9308 EN - 3 -

If the sleeve body is to be flanged, the flanging can be carried out either before or after the section with reduced outer diameter is formed. Producing the flanging before the section with reduced outer diameter is formed has the advantage that the sleeve wall is not already weakened by previous deformation during the flanging process.

Preferred embodiments of sleeve bodies according to the invention and molds for their production are explained in more detail below with reference to the drawing.

Show it:

Fig. 1 a central longitudinal section through a

first embodiment of a sleeve body;

Fig. 2 a central longitudinal section through a

second embodiment of a sleeve body;

Fig. 3 a central longitudinal section through a

Sleeve body and a first forming tool in a first working position;

Fig. 4 a central longitudinal section of the sleeve

body and the molding tool from Fig. 3 in a second working position;

Fig. 5 a central longitudinal section through a

Sleeve body and a second forming tool in a first working position;

Fig. 6 a central longitudinal section through the

Sleeve body and the forming tool from Fig. 5 in a second working position.

G 9308 EN - 4 -

Fig. 1 shows a cylindrical sleeve body 10, which has a section 11 at its upper end with a smaller outer diameter than the body 12. The outer diameter of the section 11 is dimensioned such that it is smaller than the inner diameter of the sleeve body 10 at the opposite end 13. This means that several sleeve bodies 10 can be stacked inside one another, even if the body 12 carries, for example, a yarn winding or the like. The sleeve body 20 according to Fig. 2 also has a section 21 with a reduced outer diameter, but the sleeve body 20 is flanged in this section 21, i.e. is reinforced with material. The stability of the sleeve body 20 is therefore increased compared to the sleeve body 10 from Fig. 1.

Figures 3 and 4 show a first molding tool 30 for producing a sleeve body 20 according to Figure 2. Figure 3 shows the sleeve body 20' in its raw form with a flanged upper end 22. The end 22 is pushed into the tool 30, which is a pressing die 31 and has a recess 32 that corresponds to the contour of the section 21 of reduced outer diameter of the finished sleeve body 20. Figure 4 shows the tool 30 during the pressing process.

Fig. 5-7 illustrate the manufacture of a sleeve body 20 by means of a second forming tool 40, which has a calibration mandrel 41 for determining the inner diameter of the section 21 with reduced diameter of the sleeve body 20. Coaxial to the calibration mandrel 41, a rotatingly driven tool head 42 is provided, which is equipped with several rollers 43 (Fig. 7) that rotate on the outside of the flanged sleeve body blank and thereby reduce the outer diameter in section 21. The calibration mandrel 41 can be fixed or also rotate.

Claims (4)

f*t« G 9308 DE - 5 - Protection claims: 1. Hollow cylindrical sleeve body made of paper or another organic material, characterized in that it has a section (11, 21) with a reduced outer diameter at one end, the outer diameter of this section being smaller than the inner diameter of the sleeve body at the opposite end (13, 23). 2. Sleeve body according to claim 1, characterized in that it is flanged at its end of reduced outer diameter (21). 3. Molding tool for producing a sleeve body according to claim 1 or 2, characterized by a pressing die (31) with a mold recess (32) corresponding to the contour of the section of reduced outer diameter (21) of the sleeve body (20). 4. Forming tool for producing a sleeve body according to claim 1 or 2, characterized by a calibration mandrel (41) for determining the inner diameter of the section with reduced outer diameter (21) and a coaxially arranged to the calibration mandrel (41), rotatingly driven tool head (42) which is equipped with several rollers (43) which, when rolling on the outside of the sleeve body, bring about the diameter reduction in the section (21).