Rotary-table press with removable punches
View Patent ↗The invention relates to a rotary press with anti-rotation secured shafts and exchangeable punches attached thereto. The rotary press comprises a punch turn which is universally ensured with the use of anti-rotation secured punch shafts, meaning, not only with rotation-symmetrical but also with roll-guided punches, is solved in such a way that the exchangeable punch is executed in a rotational manner, where a circumferential recess in the stem of the punch is envisaged, into which a component such as a spring thrust piece engages for the purpose of fixation, and that the shell surface of the exchangeable punch indicates a zone which interacts with a zone of the external component, either force-locking or positive locking, in such a way that the punch receives a turning movement at a defined point of the pitch circle of the punch circumference.
1. Rotary press comprising a plurality of punches arrayed in a circle for rotating about the rotary press,
each of said punches being an exchangeable punch disposed rotatably about a punch shaft, the punch shaft being secured against rotation with respect to its longitudinal axis,
a connecting component residing in a circumferential recess of a stem of the punch effecting a rotational connection of the punch with the punch shaft,
an external component residing substantially externally of the circle, a second zone of the external component residing adjacent the circle,
a shell surface of the punch comprising a first zone which is engageable with the second zone of the external component, the second zone being fixed with respect to the rotation of the punches about the circle, the first zone and second zone together comprising a means for effecting a force-locking or a positive locking in such a way that the punch receives a turning movement at a defined point of circle.
2. Rotary press according to claim 1 , wherein the shell surface of the punch comprises the first zone for interacting with the second zone of the external component.
3. Rotary press according to claim 1 , wherein the external component is separately adjustable and moveable into different, defined points of the circle, the external component being radially positionable around the circle.
4. Rotary press according to claim 1 , wherein the external component has a bearing location which is radially elastic.
5. Rotary press according to claim 1 , wherein a seal seals a joint between the punch shaft and the punch.
6. Rotary press according to claim 1 , wherein the first zone of the shell surface of the punch interacts with the second zone of the external component is a separated and exchangeable element of the punch.
7. Rotary press according to claim 1 , wherein the first and second zones of the shell surface and the external component, respectively, comprise serration or friction surfaces.
8. Rotary press according to claim 7 , wherein the serration or friction surfaces are low in mass and elastic in a circumferential direction.
9. Rotary press according to claim 8 , wherein the second zone of the external component is an elastically yielding spring element disposed in a movement direction of the punch, such that the elastically yielding spring element can simultaneously absorb an occurring impact energy and, ensure a secure and reliable engagement into the first zone of the shell surface of the punch.
10. Rotary press according to claim 8 , wherein the first zone of the shell surface of the punch comprises a tooth profile adapted to the second zone of the external component.
11. Rotary press according to claim 8 , wherein the second zone of the external component comprises at least two spring elements situated one behind the other in movement direction of the punch and arranged in a comb-like manner.
12. Rotary press comprising a plurality of dies and a plurality of punches arrayed in a circle for rotating about the rotary press, each of said punches being an exchangeable punch attached to a punch shaft, the punch shaft being secured against rotation with respect to its longitudinal axis, an external component residing substantially externally of the circle, a second zone of the external component residing adjacent the circle,
the dies being trunnion-supported and comprise on their outer sides a first zone which is engageable with the second zone of the external component, the second zone being fixed with respect to the rotation of the punches about the circle, the first zone and the second zone together comprising a means for effecting a force-locking or positive locking, in such a way that the dies receive a rotational movement at a defined point of circle.
13. Rotary press according to claim 1 , wherein the connecting component is a spring thrust piece.
14. Rotary press according to claim 5 , wherein the seal is a labyrinth seal.
15. Rotary press according to claim 10 , wherein the tooth profile is a trapezoidal or a saw tooth profile.