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AssigneeAB Skanska Cementgjunteriet
InventorOwe C. G. Larkfeldt
Estimating the term…
A process and a device for producing concrete pipe by filling and compacting fresh concrete in an upright casting form. An outer jacket surrounding a vibrator-equipped core is rotated around its geometric axis with an internal peripheral speed which is greater than the maximum vibrational speed at which said core acts on the fresh concrete during compaction, said vibrational speed being the product of the amplitude and frequency at which the core vibrates. Around its circumference, the outer jacket has axially distributed roller paths for cooperation with rotationally journalled rollers which can be pressed against them. At least one roller is driven and is a drive means for rotating the jacket, the others being non-driven support rollers. All rollers are mounted on a frame member around the outer jacket of the casting form.
Process for producing concrete pipe by filling and compacting fresh concrete in an upright casting form, comprising an outer jacket and a vibrator-equipped core located therein, characterized in that the outer jacket, during at least a portion of the compaction of the fresh concrete, is kept in rotation around its geometric axis with an internal peripheral speed which is greater than the maximum vibrational speed at which the vibrator-equipped core acts on the fresh concrete during the compacting thereof, the vibrational speed being the product of the amplitude and the frequency at which the core vibrates.
Device for the production of concrete pipe by filling and compacting of fresh concrete in an upright casting form, which comprises an outer jacket and a vibrator-equipped core located therein, the outer jacket being arranged for rotation around its geometric axis and being provided with drive means whereby the jacket is imparted the required rotation, characterized in that the outer jacket is provided around its circumference with a number of roller paths distributed axially along the same, said paths being intended to cooperate with a number of rotationally journalled rollers which can be pressed against the paths, at least one of said rollers being driven by a drive means for achieving rotation of the jacket and the others being non-driven and being support rollers during the rotation of the jacket, all of the rollers being mounted on a frame member around the outer jacket of the form, controllable vibrator means to vibrate the core to act on fresh concrete and jacket drive means for providing required rotation to the jacket whereby said controllable vibrator means and said jacket drive means are operable such that the internal peripheral speed of the outer jacket is greater than the maximum vibrational speed which the core acts on the fresh concrete.
Dependencies are inferred from the claim text.