Device for producing foil rolls

A technology of film rolls and equipment, applied in thin material handling, strip winding, transportation and packaging, etc., can solve problems such as increasing production costs and having to be removed from the machine by hand
CN1610639AInactive Publication Date: 2005-04-27ILLINOIS TOOL WORKS INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ILLINOIS TOOL WORKS INC
Publication Date
2005-04-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

A device for producing film rolls, which is in particular suitable for producing coreless film rolls, comprises a roll holder for receiving a film roll comprising a film sheet to be wound off. The film sheet is wound up to a winding mandrel for producing the preferably coreless film roll. For producing in particular a coreless film roll the winding mandrel comprises a plurality of radially displaceable holding segments extending in longitudinal direction of the winding mandrel. After transfer of the winding mandrel, together with the wound-up film roll, to a transport means, the winding mandrel is transported to a delivery station. The delivery station serving for automatically delivering the wound-up film roll from the winding mandrel comprises a displacement means with the aid of which the holding elements of the winding mandrel are displaced into a delivery position. In this delivery position the outer diameter of the winding mandrel is smaller such that the film roll is delivered from the winding mandrel and falls onto a transport belt.
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Description

technical field

[0001] The invention relates to an apparatus for producing rolls of film. The device can be used in particular for the production of coreless film rolls, ie film rolls which do not comprise any cardboard core or the like. This equipment is especially suitable for the production of pre-stretched or pre-expanded film sheets. Background technique

[0002] An apparatus for producing coreless film rolls is known from WO 99 / 06312. The apparatus described here includes a roll holder that receives a roll of film comprising film sheets to be wound. The film sheet is an unstretched film sheet. The film sheet is unwound from the film roll, stretched with the aid of wheels and wound onto a winding mandrel. At least one of the deflection wheels is embossed for the purpose of stretching the film. Also, the rate of rotation of the individual steering wheels can be varied to enable effective stretching. With the help of a control device, the film sheet is wound onto th...

Claims

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