Besides a procedure of regular building-up of the pressing force after the pressing plates are getting in contact, in some special cases there is need of driving a certain stroke distance control by using a laboratory press.
An example of such an application by using any stroke control system is any kind of (hot) embossing task. The convergence process before getting in contact seems to be important.
This convergence is intended to take place in a certain way right BEFORE the pressing force itself is being built up. Here important could be the stroke speed of the pressing platens on their way to get in full contact. Imagine loose mats or wood chips or a sponge as an example material.
The certain task of our customer consisted of a micro embossing sample to be produced with a very special geometry in the plastic surface of the sample.
As a result, the well-known lotus effect should be aimed on the surface. By using a prepared micro press punch, fine hemispheres (outwardly protruding bulges) were embossed into a plastic surface under the influence of temperature. This lead to the desired optimal perfect embossing result by means of the extremely slow convergence control feature.
A stroke control is used in cases that any predefined approach positions (like as “floors”) comparable to an “elevator” are meant to be driven.
Any stroke control system can only be realized up to the compressibility limit. After the compressibility limit has been overcome, the process of building up the press force starts until the certain level will be reached. This certain level of pressing force can be determined beforehand by user.