Screw combination of double-shaft feed extruder

Abstract

The invention discloses a screw combination of a double-shaft feed extruder, and belongs to the technical field of extrusion equipment. The screw combination of a double-shaft feed extruder comprisestwo screw rods which are meshed in parallel and rotate in the same direction. The screw rods have the same shape and structure. Each screw rod comprises a feeding section, a material extruding sectionand a discharging section, wherein the feeding section comprises a first feeding screw, a first material homogenizing screw and a first material extruding meshing piece which are fixedly arranged insequence; the material extruding section comprises a second feeding screw, a second material homogenizing screw and a second material extruding meshing piece which are fixedly arranged in sequence; the discharging section comprises a third feeding screw, a third homogenizing screw and a pressure relief screw which are fixedly arranged in sequence; and the feeding section, the extruding section andthe discharging section are fixedly arranged in sequence. Under the action of the first extruding meshing piece and the second extruding meshing piece, higher treatment temperature and treatment pressure can be achieved during combined work, heat energy converted by mechanical energy can completely extrude materials with high fat content and low starch content , and the curing degree of the materials is guaranteed.

Description

technical field [0001] The invention relates to the technical field of puffing equipment, in particular to a screw combination of a biaxial feed puffing machine. Background technique [0002] The extruder unit is a combination of processing equipment that integrates various processes such as mixing, shearing, heating, kneading, cooling and molding. Its structure mainly includes a conditioner, a bearing box and an extruding mechanism. Quenching and tempering treatment makes the steam, moisture and temperature of the material suitable for the puffing requirements. The bearing box provides the support of the main machine and transmits the energy to the extruding main machine. The extrusion puffing mechanism transports, shears, kneads and extrudes the material. [0003] Most of the current extruders use a single-screw extruder, and some even use a twin-screw extruder structure, which significantly improves the kneading, rolling and shearing effects of the material, and the proce...

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Problems solved by technology

[0003] Most of the current extruders use a single-screw extruder, and some even use a twin-screw extruder structure, which significantly improves the kneading, rolling and shearing effects of the material, and the processing efficiency is high. However, when encountering high-fat and low-starch materials At the same time, the thermal energy converted by its mechanical energy is difficult to expand the material, resulting in the inability to take care of the production of high-fat and low-starch content materials. For example, when producing bullfrog feed, the problem of insufficient maturity is prone to occur.

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