Molding tool and method for regulating a temperature distribution in a molding tool

Abstract

A molding tool for producing three-dimensional products from a fiber-containing material and a method for regulating a temperature distribution in a molding tool for producing three-dimensional products are described.

1 . A molding tool for producing three-dimensional products from a fiber-containing material, having at least one first tool component and at least one second tool component, wherein the first tool component and the second tool component each have a tool body, wherein the tool body of the first tool component has at least one cavity, and the tool body of the second tool component has at least one mold part corresponding to the at least one cavity, wherein the at least one mold part and the at least one cavity can be moved relative to one another to form a mold space between corresponding surfaces of the at least one cavity and the at least one mold part and is configured to be pressed in order to press a fiber-containing material introduced into the mold space, and wherein the first tool component and/or the second tool component have at least one heating device, wherein the at least one heating device is arranged such that, as a result of the arrangement of the at least one heating device, at least one first heating circuit is formed in the tool body, and at least one second heating circuit is formed in an associated at least one cavity or mold part. 
     
     
         2 . The molding tool according to  claim 1 , wherein the at least one heating device has at least one heating element arranged asymmetrically in the tool body and in the associated at least one cavity or mold part. 
     
     
         3 . The molding tool according to  claim 2 , wherein an effective heating surface of the at least one heating element has a larger surface area extension within:
 the tool body relative to a surface area extension within the associated at least one cavity or mold part, or   at least one cavity or mold part relative to a surface area extension within the tool body.   
     
     
         4 . The molding tool according to  claim 1 , wherein the at least one heating device has at least one first heating element and at least one second heating element, wherein the at least one first heating element is arranged in the tool body, and the at least one second heating element is arranged in the associated at least one cavity or mold part. 
     
     
         5 . The molding tool according to  claim 4 , wherein the at least one first heating element and the at least one second heating element have a different heating output due to their configuration. 
     
     
         6 . The molding tool according to  claim 1 , having several cavities and associated mold parts, wherein heating elements of the at least one heating device are arranged differently with respect to a position and/or an orientation relative to one another and/or to the associated cavities or mold parts. 
     
     
         7 . The molding tool according to  claim 1 , wherein at least one heating element of at least one heating device for a cavity or mold part is arranged and/or controllable differently than at least one heating element of at least one heating device for a further cavity or mold part of a first tool component and/or a second tool component. 
     
     
         8 . A method for regulating a temperature distribution in a molding tool for producing three-dimensional products from a fiber-containing material, comprising:
 pressing preforms into products under pressure and temperature in the molding tool, wherein the molding tool has at least one first tool component and at least one second tool component, wherein the first tool component and the second tool component each have a tool body, wherein the tool body of the first tool component has at least one cavity, and the tool body of the second tool component has at least one mold part corresponding to the at least one cavity, wherein the at least one mold part and the at least one cavity are moved relative to one another in order to form a mold space between corresponding surfaces of the at least one cavity and the at least one mold part and are pressed in order to form a fiber-containing material that can be introduced into the mold space, wherein the first tool component and/or the second tool component have at least one heating device, and   forming at least one first heating circuit in the tool body, and at least one second heating circuit is formed in an associated at least one cavity or mold part by the at least one heating device, and wherein a temperature of the tool body of the first tool component and/or of the second tool component and a temperature of the associated at least one cavity or at least one mold part are individually regulated by the at least one heating device.   
     
     
         9 . The method according to  claim 8 , wherein the at least one heating device has at least one first heating element and at least one second heating element, and the at least one first heating element is arranged in the tool body, and the at least one second heating element is arranged in the associated at least one cavity or mold part, wherein the temperature of the tool body and the temperature of the associated at least one cavity or mold part are individually regulated via the at least one first heating element and the at least one second heating element. 
     
     
         10 . The method according to  claim 9 , wherein heating of the tool body of the first tool component and/or of the second tool component and of the associated at least one cavity or mold part is controlled individually, with respect to a provided temperature and heating duration, via the at least one first heating element and the at least one second heating element. 
     
     
         11 . The method according to  claim 8 , wherein several cavities and/or mold parts assigned to a tool body are heated differently.