With welded rule joints Marbach offers its customers a solution for the best die-cutting results – even for challenging materials.
When cutting very thick material or material with fabric, conventional tools often reach their limits. The same counts for die-cutting plastic material, as it is the case with thermoforming tools with steel-rule technology. Because rule joints can open up through the enormous load at spots where different cutting rules meet. If this happened it would create a huge nick in the blank. As a result, not only the visual appearance of the packaging and its functionality would be affected, but also the production process itself. For this reason it is necessary to truly unite the rule joints for those challenging materials.Different methods can be used: Laser, TIG or punctual welding. Marbach offers laser welding upon special request by customers or for strongly carbonaceous materials.
The laser welding process reaches its limits quickly with conventional standard steel. For this reason Marbach uses a special TIG welding process. Uwe Murrweiss, production manager at Marbach: “Our analysis of different materials has revealed that the TIG welding process provides significantly greater stability and flexibility for rule joints of standard steel than conventional laser welding. That’s why we mostly weld rule joints with the WIG procedure. In this way, we achieve very fine welds with low energy input. During this special welding process less heat occurs than through conventional welding. So the structure of the cutting rule’s edge only changes minimally with TIG welding. This results in identical rule heights and hardnesses on both connection points. The rules are therefore not only being connected optimally but also the rule joint is on one level. The material can be cut neatly.”
Special machine equipment as well as relevant know-how is necessary for this kind of welding. Marbach has both. And prefers the TIG technology, as do the customers. Murrweiss: “Our customers insist on this kind of rule joints because like this they can achieve the optimal cutting result.”
Marbach has revised its hand-held tool for the insertion of nicks in cutting rules. The new marbanick|2+ is impressive with its integrated quick-change function, through which wedges of different widths can be quickly changed. In addition, its special design makes it possible to use different impact levels in one device.
Marbach has a new technology in its portfolio. The universal sheet delivery is a tool with which sheet delivery in the die-cutting machine can be extended so that the delivery of the paperboard sheets can be quickly and easily adapted to each individual job.
Marbach Werkzeugbau is currently working intensively on the topics of digitization and industry 4.0. The main focus here is on digital solutions for tools, processes and services. Within the scope of this project, Marbach has analyzed the future requirements of its customers. The results of this are the two components CONNECT|M and CONNECT|AR (Augmented Reality). CONNECT|M is a technology that intelligently connects the thermoforming tool, Marbach and the customer. CONNECT|AR is about virtual customer support via remote maintenance.
Marbach offers an extensive portfolio of dieboards. The suitable dieboard can be selected according to the requirements of the customer or the particular order. The dieboard forms the basis of a cutting-die. The contours of the packaging are first inserted into the dieboard, then the cutting and creasing rules are positioned and finally the appropriate rubber coating is applied.