Claims
- 1. A vacuum extrusion system including a vacuum chamber having a fixed and movable section, the movable section being mounted for telescoping movement over said fixed section to open the chamber, stop blocks on said fixed section, and respective lock blocks on said movable section operative to be driven against said stop blocks by respective cylinder actuators to lock said sections closed.
- 2. An extrusion system as set forth in claim 1 including cam means to guide said lock blocks into engagement with said stop blocks, when locking the chamber, and clear of said stop blocks when opening the chamber.
- 3. An extrusion system as set forth in claim 2 wherein each lock block is mounted on a rod of one of said cylinder actuators.
- 4. An extrusion system as set forth in claim 3 wherein each lock block includes a transverse follower, and a cam engaging said follower to move the lock block to and from the clear and engagement positions.
- 5. An extrusion system as set forth in claim 1 including fluid seals for said chamber, said actuators counteracting forces generated by said fluid seals.
DISCLOSURE
This invention relates generally as indicated to a vacuum extrusion system, and more particularly to certain improvements in the invention disclosed in the prior application of Roger Lightle et al. Ser. No. 08/696,472, filed Aug. 14, 1996, and entitled "Vacuum Extrusion System and Method" now U.S. Pat. No. 5,753,161.
US Referenced Citations (29)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0260948 |
Mar 1988 |
EPX |
0260949 |
Mar 1988 |
EPX |