Rieter Automotive (international) Ag

Evelyn Zwick

Alexander Wildhaber

The method and the device for manufacturing an acoustically effective foil stack ( ) made of embossed foil webs ( ) is characterised by the fact that at least two foil webs lying over one another ( ) are embossed at the same time, are conveyed along different length conveying routes (W, W , W , W ), and then are brought together into a stack ( ), and embossed foil webs ( ) arranged to be lying next to one another are laid down in an offset fashion due to the different length conveying routes (W, W , W , W ). A particularly advantageous design of the embossing rollers ( ) provides foil webs which have knobs with a draped or folded type structure.

Acoustically effective foil stack for a vehicle heat shield

The method and the device for manufacturing an acoustically effective foil stack ( ) made of embossed foil webs ( ) is characterised by the fact that at least two foil webs lying over one another ( ) are embossed at the same time, are conveyed along different length conveying routes (W, W , W , W ), and then are brought together into a stack ( ), and embossed foil webs ( ) arranged to be lying next to one another are laid down in an offset fashion due to the different length conveying routes (W, W , W , W ). A particularly advantageous-design of the embossing rollers ( ) provides foil webs which have knobs with a draped or folded type structure.

Process for the manufacture of an acoustically effective foil stack for a vehicle heat shield

The invention relates to a method of producing a sound-absorbent insulating element with at least two metallic leaves or sheets ( ) in the form of films or sheets. According to said method, at least one of said elements is provided with knobs in such a manner that the limit of elasticity of the respective sheet ( ) is exceeded during the knobbing process, resulting in the formation of fissures ( ). Said fissures substantially help to improve the acoustic absorption capacity of the insulating element produced according to the inventive method.

Method of producing a sound-absorbent insulating element and insulating element produced according to this method

The invention relates to a method for producing an insulating pack ( ), according to which a stack ( ) of metallic lamellae is cold-welded simultaneously along a predefined contour and separated from a remaining area. The insulating pack produced according to the invention preferably has a plurality of knobbed and/or perforated aluminium foils ( ) and at least one stretch film ( ) and is characterized by a narrow welding seam ( ) extending along the edge. The insulating pack can be used as an insulating part on its own or loosely inserted into an additional supporting or covering layer. Such insulating parts can be configured in an acoustically active manner and are used in the motor industry, machine industry and/or electronic or computer industry. Means for carrying out the method provided for in the invention provide for the use of a cutting blade with two cutting flanks. A preferred version of the cutting blade has cutting flanks inclined at different angles and can be configured as a rotary blade.

Method for producing an insulating pack for an insulating part

A vehicle lining is disclosed which is used in the area of curved body parts. The vehicle lining has a vibration-damping and heat-shielding action. The vehicle lining has a heat shield which is positioned on an exterior facing side of a vehicle and held Lightly against the curved body part by suitable fixing means. The heat shield of the vehicle lining has a supporting sheet-metal plate and an elastic insulating pad. Vibration damping achieved by the disclosed vehicle lining reduces or eliminates the need for vibration-damping measures at the level of an interior vehicle lining.

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Ebmatingen, Switzerland

Evelyn Zwick