Axial cross type press roll extruding machine and axial cross type rolling process

Abstract

The invention discloses an axial cross type press roll extruding machine which comprises a machine frame. A first press roll and a second press roll are arranged on the machine frame. The first press roll is a movable roll and mounted on a first fixing frame. The first press roll is connected with a first lifting mechanism through a first transmission bearing at one end, and the first lifting mechanism is used for driving the first press roll to move up and down on the first fixing frame. The second press roll is a fixed roll and mounted on a second fixing frame. The second press roll is connected with a second lifting mechanism through a second transmission bearing at one end, and the second lifting mechanism is used for driving the second press roll to move up and down on the second fixing frame. According to the axial cross type press roll extruding machine, the first press roll and the second roll are oppositely arranged in a crossing mode instead of being oppositely arranged in a horizontal mode by adjusting the first lifting mechanism and the second lifting mechanism, the two rolls are changed into point contact from original linear contact, roll surface deformation caused by opposite pressing of the rolls is effectively avoided, and therefore the extruding machine can be applied to producing different sheets.

Description

technical field [0001] The invention relates to the technical field of extruders, in particular to an axis-crossing pressure roller extruder. Background technique [0002] Extrusion processing of plastic sheet, sheet cooling and forming are completed by two opposing rollers. The roller plays the role of cooling, shaping and adjusting the thickness of the sheet. Because the molten plastic material passes through the gap between two opposing rollers, the pressure of the rollers acts on the rubber material in opposite directions. Due to the interaction of forces, the rubber material also produces a reaction force to the rollers on both sides, which will It will cause the roller to be sunken and deformed, and the thickness error of the sheet will occur. In order to make the thickness of the sheet produced after rolling uniform, when making the roller, a value is increased in the middle of the roller, that is, the middle-high method. However, a fixed mid-to-high value only cor...

AI Technical Summary

Problems solved by technology

However, a fixed mid-to-high value only corresponds to the deformation coefficient of a sheet of thickness, which cannot be used universally.

This limits the sheet production thickness range of the roll

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