A high-shear high-mixing plasticizing screw

Abstract

The invention discloses a high-shearing and high-mixing plastified screw rod. The high-shearing and high-mixing plastified screw rod comprises a screw rod main body, wherein the screw rod main body is sequentially provided with a connection section, a fixed section, a feeding section, a compression section, a double-thread fusing section, a mixing section and a discharging section; the double-thread fusing section is provided with a main thread and a secondary thread; the bottom of a main thread groove is the surface of a core column, the outer diameter of the bottom of a secondary thread groove keeps unchanged and the bottom of the secondary thread groove is higher than the surface of the core column; the groove width of the secondary thread groove is gradually increased from left to right and then is suddenly reduced at the right end; the mixing section comprises a first mixing section and a second mixing section; each of the first mixing section and the second mixing section is provided with an inclined groove; when a fused body passes through the double-thread fusing section, the fused body is subjected to high shearing and then is fused so that the plastifying capability is increased; fused plastic is pushed forwards through the secondary thread groove and unfused plastic is further compressed by the main thread groove so that the better plastifying effect is realized; the mixing section is used for carrying out sufficient stirring and flow distribution on the fused body so that additives including color powder, master batches and the like in a plastified body can be more effectively and uniformly distributed, the mixing effect is increased, and the quality and yield of the product are improved.

Description

technical field [0001] The invention relates to a screw used in an injection molding machine, in particular to a high-shear and high-mixing plasticizing screw. Background technique [0002] The screw is one of the key parts of the injection molding machine. It rotates in the barrel of the injection molding machine. Its main function is to transport and compact the solid plastic particles or plastic powder into a molten state; however, today's general screw , its effect on the shearing and melting of raw materials and additives is poor, resulting in insufficient mixing and melting of raw materials and additives in the material tube, and the poor mixing performance of the screw is also difficult to ensure uniform mixing of raw materials and additives, which affects Finished product quality. [0003] Therefore, it is urgent to work out a new technical solution to solve the aforementioned problems. Contents of the invention [0004] In view of this, the present invention aim...

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Problems solved by technology

[0002] The screw is one of the key parts of the injection molding machine. It rotates in the barrel of the injection molding machine. Its main function is to transport and compact the solid plastic particles or plastic powder into a molten state; however, today's general screw , its shearing and melting effect on raw materials and additives is poor, resulting in insufficient mixing and melting of raw materials and additives in the material tube, and the poor mixing performance of the screw is also difficult to ensure uniform mixing of raw materials and additives, which affects Finished product quality.

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