Rotor for a rotary press

Patent metadata

Field	Value
Publication number	US-9981440-B2
Application number	US-201615099806-A
Country	US
Kind code	B2
Filing date	Apr 15, 2016
Priority date	Apr 17, 2015
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

A rotor for a rotary press comprising a die plate having die bores and upper punches and lower punches assigned in pairs to the die bores, circulating synchronously with the die plate An upper punch receiver is configured to axially guide the upper punches and a lower punch receiver is configured to axially guide the lower punches. An upper control cam is configured to control the axial movement of the upper punches passing through the upper control cam and a lower control cam is configured to control the axial movement of the lower punches passing through the lower control cam.

First claim

The invention claimed is:

1. A rotor for a rotary press comprising:
a die plate having die bores and upper punches and lower punches assigned in pairs to the die bores, the upper and lower punches configured to circulate synchronously with the die plate;
an upper punch receiver configured to guide the upper punches;
a lower punch receiver configured to guide the lower punches;
an upper control cam configured to control axial movement of the upper punches passing through the upper control cam;
a lower control cam configured to control axial movement of the lower punches passing through the lower control cam;
at least one upper contact part in contact with at least a portion of the upper punches passing through;
at least one lower contact part in contact with at least a portion of the lower punches passing through;
at least one upper adjusting element configured to adjust a position of the at least one upper contact part by altering a distance from the upper punches passing through, wherein the at least one upper contact part is always pressed with a substantially constant force onto the upper punches passing through; and
at least one lower adjusting element configured to adjust a position of the at least one lower contact part by altering a distance from the lower punches passing through, wherein the at least one lower contact part is always pressed with a substantially constant force against the lower punches passing through.

2. The rotor according to claim 1 , wherein the at least one upper contact part is in contact with punch shafts of the upper punches.

3. The rotor according to claim 1 , wherein the at least one lower contact part is in contact with punch shafts of the lower punches.

4. The rotor according claim 1 , wherein the at least one upper contact part is in contact with punch heads of the upper punches.

5. The rotor according to claim 1 , wherein at least one lower contact part is in contact with punch heads of the lower punches.

6. The rotor according to claim 1 , wherein at least a portion of the upper control cam comprises a plurality of upper contact parts in contact with a portion of the upper punches passing through in different regions and configured to apply lubricant onto the different regions.

7. The rotor according to claim 1 , wherein at least a portion of the lower control cam comprises a plurality of lower contact parts in contact with the lower punches passing through in different regions and configured to apply lubricant onto the different regions.

8. The rotor according to claim 1 , wherein at least one of the at least one upper adjusting element and the at least one lower adjusting element is formed by at least one spring element.

9. The rotor according to claim 1 , wherein the at least one upper contact part and the at least one upper adjusting element are configured so that at least one upper punch is always brought into contact by the at least one upper contact part.

10. The rotor according to claim 1 , wherein the at least one upper adjusting element comprises at least one upper adjusting drive acting on the at least one upper contact part and in that the at least one lower adjusting element comprises at least one lower adjusting drive acting on the at least one lower contact part.

11. The rotor according to claim 10 , wherein at least one of the at least one upper adjusting drive and the at least one lower adjusting drive is an pneumatic drive.

12. The rotor according to claim 10 , wherein the at least one upper adjusting drive is an electrical upper adjusting drive.

13. The rotor according to claim 1 wherein at least one of the at least one upper contact part and the at least one lower contact part comprise at least one contact portion soaked in lubricant.

14. A rotary press comprising:
a rotor, the rotor further comprising a die plate having die bores, upper punches and lower punches assigned in pairs to the die bores, wherein the upper and lower punches configured to circulate synchronously with the die plate;
a drive configured to rotationally drive the rotor;
an upper punch receiver configured to guide the upper punches;
a lower punch receiver configured to guide the lower punches;
an upper control cam configured to control axial movement of the upper punches passing through the upper control cam;
a lower control cam configured to control axial movement of the lower punches passing through the lower control cam;
at least one upper contact part in contact with at least a portion of the upper punches passing through;
at least one lower contact part in contact with at least a portion of the lower punches passing through;
at least one upper adjusting element configured to adjust a position of the at least one upper contact part by altering a distance from the upper punches passing through, wherein the at least one upper contact part is always pressed with a substantially constant force onto the upper punches passing through;
at least one lower adjusting element configured to adjust a position of the at least one lower contact part by altering a distance from the lower punches passing through, wherein the at least one lower contact part is always pressed with a substantially constant force against the lower punches passing through;
at least one filling station, the at least one filling station comprising at least one filling device for filling the die bores with material to be compressed;
at least one pressing station located downstream of the at least one filling station and comprising at least one pressing device which presses the upper punches and lower punches into the die bores when passing through the at least one pressing station; and
at least one ejection station located downstream of the pressing station in a rotational direction of the rotor and comprising an ejection device for ejecting tablets pressed into the die bores.

Assignees

• Fette Compacting Gmbh

Inventors

• Luedemann Stefan

Classifications

• B29C43/32

  Component parts, details or accessories; Auxiliary operations · CPC title

• B29C2043/3288

  using cam drives · CPC title

• B29C43/58

  Measuring, controlling or regulating {(for bank adjustment in calendering B29C43/245)} · CPC title

• B29C43/08

  with circular movement {, e.g. mounted on rolls, turntables} · CPC title

• B29C2043/046

  travelling between different stations, e.g. feeding, moulding, curing stations · CPC title