Claims
- 1. A method of guiding first and second endless steel bands about a longitudinal axis of a continuously working press for the manufacture of pressed boards, the continuously working press having short-stroke pressure cylinders and multiple pressure regions of varying pressure and said bands transmitting pressing pressure to the material to be pressed and drawing said material through said press, said method comprising the steps of:
- (A) guiding said first and second bands, via driving drums and return drums, around a pressing ram and a pressing table, respectively;
- (B) supporting said steel bands, with an adjustable pressing gap formed therebetween, on a plurality of co-rotating steel rods which are guided, with their axes of rotation extending transversely to the direction of travel of said bands, against abutment lugs of said table and said pressing ram; and
- (C) altering a position of said pressing ram; and a part of said pressing ram is inclined at an angle .alpha. relative to a horizontal plane; and
- (D) applying a varying pressure profile to the material to be pressed via the inclined pressing ram along a direction transverse to the longitudinal axis; and
- (E) altering an angle of at least one of said drums through an angle .beta. at least at a beginning of step C).
- 2. A method as claimed in claim 1, wherein said altering step (c) includes the steps of
- (i) temporarily relieving pressure in short-stroke pressure cylinders which are located on one longitudinal side of a high-pressure region of said press, and then
- (ii) applying a pressure which opposes the pressure imposed by said pressure cylinders and which overcomes the pressures imposed by those of said pressure cylinders which are located on said one longitudinal side, thereby adjusting the position of said one longitudinal side so that said part of said pressing ram is inclined to said angle .alpha..
- 3. The method as claimed in claim 2, wherein said step (i) further comprises the step of temporarily relieving pressure in short-stroke pressure cylinders located in a medium-pressure region of said press.
- 4. The method as claimed in claim 1, wherein said step (i) further comprises the step of applying pressing pressure to a transverse row of short-stroke pressure cylinders connected to an individual spar of said press, which applied pressing pressure progressively increases from a minimum pressure in a first one of said row of pressure cylinders which is located adjacent said one longitudinal side to a maximum pressure in another one of said row of pressure cylinders which is located on a longitudinal side opposite said one longitudinal side.
Priority Claims (1)
Number |
Date |
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4017791 |
Jun 1990 |
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Parent Case Info
This application is a continuation of application Ser. No. 08,026,216, filed Mar. 1, 1993 (now U.S. Pat. No. 5,253,571), which is a continuation of Ser. No. 07/672,650, filed on Mar. 21, 1991 (now abandoned).
US Referenced Citations (12)
Foreign Referenced Citations (5)
Number |
Date |
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2104490 |
Aug 1972 |
DEX |
2643346 |
Mar 1980 |
DEX |
2812013 |
Oct 1980 |
DEX |
3149243 |
Jun 1983 |
DEX |
304151 |
Jul 1971 |
SUX |
Continuations (2)
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Number |
Date |
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Parent |
26216 |
Mar 1993 |
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Parent |
672650 |
Mar 1991 |
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