ES2619625T3 - Core support with automatic tensioning - Google Patents

Abstract

Core support (1) for holding cores (6), for winding and/or unwinding winding material, in particular web-shaped materials such as adhesive tapes, the core support (1) consisting of a tension ring (11) , which serves to accommodate a core (6) and, when it is on a winding shaft (3), to transmit a torque to the core (6) and whose outer rolling surface essentially has the shape of a cylinder circular right, the clamping ring (11) being designed in a flexible manner, in such a way that the external diameter of the clamping ring (11) can be varied, characterized in that the clamping ring (11) is configured as a closed ring in itself and has at least one recess (21) that extends towards the inside of the inner and/or outer rolling surface.

Description

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In the particularly advantageous manufacture of the plastic core support, for example from Novatron HPV® of the PolyPenco company (a plastic based on polyethylene terephthalate), a reduced weight of the core support is also achieved. The core material mentioned are characterized by high stability.

The core support according to the invention has, in particular in association with others on a winding shaft, a number of advantages. The winding moment is reproducible and adjustable for each individual core support, because a mutual influence of the transmitting core supports of the individual frictions, when arranged on a winding shaft, is discarded. In this way a desired winding characteristic can be adjusted, that is, technically important and relevant data for the quality of the subsequent winding can be predefined from the outside. The skilful friction regulation prevents the formation of plugs in the winding as well as the finished winding is deformed telescopically.

A core offset is discarded because the core holder cannot slide over the winding shaft due to the collar at the edge of the jacket during the placement of the cores. This collar also guarantees that the individual core supports can be held on the winding shaft at defined points.

Different embodiments of the core support of the invention will be illustrated below by six figures, without wishing to limit them unnecessarily by the choice of the figures represented.

Show

Figure 1 a core support made particularly advantageously in side view,

Figure 2 in side view, the core support made particularly advantageously in Figure 1 with

a core placed thereon, the core support being arranged on a tree of

winding,

Figure 3 the core support together with the winding shaft according to Figure 2 in side view according to line A-A,

FIG. 4 another embodiment, not covered by the invention, of a core support with a safety ring in an exploded view,

Figure 5 a perspective side view of a ring segment of the tension ring of Figure 4, and

Figure 6 a side view of the core support of Figure 4 with a core placed thereon, the core support being arranged on a winding shaft.

Figure 1 shows a core support 1 made especially advantageously in side view. The core support 1 consists of a tensioning ring 11, which serves on its outer side to accommodate a core 6 and, when it is on a winding shaft 3, for the transmission of a turning moment to the core 6. The surface of External tread has the shape of a straight circular cylinder and the tension ring 11 itself is the shape of a hollow thick-walled cylinder.

In the tension ring 11 there are several recesses 21, 22, 23, which extend in the inner and outer race surface and provide the flexibility of the tension ring 11. The recesses 21, 22, 23 are notched and are extend in axial direction. Each notch 21, 22, 23 is present throughout the entire width of the tread, so that it forms a narrow gap in the tread.

Each notch 21, 22, 23 has a width of one millimeter as well as a depth of five millimeters. At the end the notches 21, 22, 23 widen cylindrically.

With the selected depth it is guaranteed that on one side the tensioning ring 11 is mobile due to the thinning of material at this point, but that on the other side there is so much material remaining between the rolling surface and the end of the recess 21, 22, 23 that, also under load, the resistance of the tension ring 11 is such that a mechanical failure is ruled out.

Three recesses 21, 22, 23 are arranged in immediate proximity to each other and form a group 2, extending two notches 21, 22 from the outer race surface of the tension ring 11 inward, while the third 23 goes from the inner race surface towards the inside of the tension ring 11 and in this respect is arranged between the other two 21, 22. The three 21, 22, 23 run in axial direction parallel to each other.

In the tension ring 11 there are eight groups 2, which are arranged at regular distances along the perimeter of the tension ring. Through these eight groups 2, the tension ring is weakened in its resistance, from

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the representation in figure 6 corresponds to those in figure 2.

Reference List

5 1 core support 2 group 3 winding shaft 4 friction elements 5 sleeve

10 6 core

11 tension ring 11a, 11b ring segments 12 safety ring / spring element

15 13a, 13b breakpoints 14 groove on the inner side 15 recess

21, 22, 23 recesses 20 31 pressure hoses

51 disc necklace

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Claims (1)

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