Single-screw sheet extruder

Abstract

The invention discloses a single-screw sheet extruder. The single-screw sheet extruder comprises a machine frame, a feeding device, an exhaust type single extrusion screw, a gear pump, an extrusion die head, a glazing press, an edge pressing and dividing machine, a traction device, a drying device, a storage shelf and a winding device, wherein the exhaust type single extrusion screw successively comprises a feeding section, a first compression section, a first metering section, a mixing section, a pressure reduction section, an exhaust section, a second compression section and a second metering section from front to back. According to the single-screw sheet extruder disclosed by the invention, the exhaust type structure is adopted, and through reasonable segmentation, the material conveying capability, the plasticizing effect and the exhaust effect are effectively improved; the single-screw sheet extruder has the exhaust function, so that water in the raw materials of plastics can be vaporized and pumped during extrusion processing, the water content of the prepared material is guaranteed to conform to requirements; the raw materials do not need to be dried before being added in the extruder, so that the drying time of the raw materials can be shortened, the energy consumption is lowered, the equipment cost is reduced, and improvement of the production efficiency can be facilitated.

Description

technical field [0001] The invention relates to an extruder, in particular to a single-screw sheet material extruder. Background technique [0002] A sheet extruder generally includes a frame, a feeding device, an extrusion screw, a gear pump, an extrusion die, a calender, an edge separation mechanism, a traction device, a drying device, a storage rack and a winding device ;Extrusion screw, gear pump, extrusion die head, calender, edge-pressing and separating mechanism, traction device, drying device, storage rack, and winding device are arranged on the frame in sequence, and the feeding device is installed on the machine frame. on the rack and above the feed section of the extrusion screw. [0003] In the plastic extrusion process, some plastic raw materials (such as PS, ABS, PET, etc.) have a high moisture content, if the moisture content is not reduced to a suitable ratio during the extrusion process, processing The finished products will have defects such as brittlenes...

AI Technical Summary

Problems solved by technology

Because the recycled materials are rough, irregular in shape and large in particle size, and in order to prevent the feeding screw from arching the plastic upward into the storage funnel, the feeding port of the feeding cylinder is generally designed to be small, so that the recycled materials often get stuck. Bridging occurs at the connection between the feeding cylinder and the storage funnel, causing blockage, which leads to a shortage of material in the sheet extruder, and must be shut down for cleaning and maintenance, which affects the smooth progress of production and reduces production efficiency.

Images