Underwater grain cutting screw embedded type knife head

Abstract

The invention relates to the field of plastic working, in particular to an underwater grain cutting screw embedded type knife head. The underwater grain cutting screw embedded type knife head comprises a knife blade and a knife rest; the two ends of one side of the knife blade are provided with a first supporting arm and a second supporting arm, and the first supporting arm and the second supporting arm are provided with through holes correspondingly; the knife rest comprises a knife rest fixing board and knife blade fixing devices, the center of the knife rest fixing board is provided with a circular hole, and a plurality of the knife blade fixing devices are distributed ringwise along the circumference of knife rest fixing board. The underwater grain cutting screw embedded type knife head has the beneficial effects that a fixing bolt of the knife blade is completely embedded in the knife rest, overall appearance of the knife head is smooth, material hanging of the knife head is prevented, the first supporting arm and the second supporting arm of the knife blade are parallel mutually, a second circular hole is formed in the second supporting arm, the inner wall of the second circular hole is glossy, the knife blade can be reversely assembled and reused after the abrasion of the one end of the knife blade, and the cost is saved.

Description

technical field [0001] The invention relates to the field of plastic processing, in particular to an embedded cutter head for underwater pelletizing screws. Background technique [0002] At present, the plastic processing industry generally uses underwater pelletizing equipment to produce plastic pellets. The molten material at high temperature passes through the die hole under the pressure of the screw extrusion, and the extruded strip material is pressed against the die plane by the high-speed rotating cutter head. Cutting, the cutter head and the die head are sealed by the water chamber, and the cut material particles are rapidly cooled and solidified by the cooling water in the water chamber to produce solid finished plastic particles. [0003] At present, the structure of the cutter head on the market mostly adopts the form that the cutter holder and the blade are separated, and a single blade is fixed on the cutter holder of a certain structure with screws to form a wh...

AI Technical Summary

Problems solved by technology

[0004] In the existing cutter heads, most of the screws that fix the blade and the cutter holder are perpendicular to the cut surface of the blade and are exposed. This combination has two disadvantages. 1. One is that some blade materials are relatively brittle, such as ceramics, and are perpendicular to the blade. It is difficult to measure the strength of tightening the screw, which may easily lead to excessive lateral force on the blade, which may cause the blade to break during use. 2. The second is that the screw is exposed. After the pressure of the die head gradually increases during the production process, the material is easy to spray onto the knife holder. Hanging on the screw, causing the bit to hang

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