Variable-diameter nose of ceramic plate extruder

Abstract

The invention discloses a variable-diameter nose of a ceramic plate extruder. The variable-diameter nose comprises a flange ring, a variable-diameter tube, a mud fixing device and an extrusion opening retaining plate. An extruder connecting opening and an extrusion opening are respectively formed at the center of the flange ring and at the center of the extrusion opening retaining plate. The inner cavity of the variable-diameter tube is of a flat horn shape. The width and height of the inner cavity of the variable-diameter tube respectively increases and decreases along the extrusion opening direction. The distance between the flange ring and the outer surface of the extrusion opening retaining plate is L. At least one pair of mud separating cutter mounting holes mounted with mud separating cutters is symmetrically formed on the upper end face and the lower end face of the variable-diameter tube. The distance between the center of one optional pair of mud separating cutter mounting holes and the outer surface of the extrusion opening retaining plate is L / 3. A rectangular hollow is formed in the mud fixing device and communicated with the extrusion opening. The variable-diameter nose of the ceramic plate extruder has the advantages that mud can be extruded smoothly, backflow is reduced, product compactness consistency is guaranteed, ceramic plates 600mm in width or in even larger specification can be extruded, and the nose is easy in edge straightness, high in productivity and low in production cost.

Description

technical field [0001] The invention relates to an extruder head, in particular to a variable-diameter head of a ceramic plate extruder. Background technique [0002] Existing ceramic plate extruders all adopt two-axis or four-axis screw extrusion, and the extruded mud is in a spiral shape, and the pressure of the spiral mud is very unstable, so the extruder head needs to be used to fix the speed. Some extrusion heads still stay on the red brick extrusion and split brick extrusion heads. [0003] As the diameters of imported extruders become larger and larger, most of which are above 400mm, the power of the extruders also increases accordingly. Using a large machine to extrude a small board surface will firstly cause a waste of resources; secondly Since a large extruder is used to extrude a small-sized board surface, according to the Bernoulli equation for calculating the mud output speed of the extruder Among them, p 1 and V 1 are the pressure and velocity at the extru...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in the prior art, the mud output speed of the extruder is unstable, the edge straightness is difficult to control, and a large amount of mud material is likely to flow back during the extrusion process, which affects the quality of the terracotta plate and causes resource failure. It is difficult to realize the above-mentioned defects such as the extrusion of large-scale ceramic plates, and provide a method that can smoothly extrude mud, reduce backflow, ensure consistent product density, easy control of edge straightness, high production efficiency, and low production cost. , and can extrude the variable-diameter head of the ceramic plate extruder with a width of 600mm or even larger

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