Novel plastic grain hot cutting machine head

Abstract

The invention relates to the technical field of plastic granulating equipment, in particular to a novel plastic grain hot cutting machine head. The novel plastic grain hot cutting machine head comprises a machine head main body; one end of the machine head main body is provided with a feeding port; a neck mould is embedded in the other end of the machine head main body, and the center of the neck mould is connected with a centering shaft in a threaded mode; the exterior of the centering shaft is sleeved with chain wheels, springs and jam nuts in sequence, wherein the chain wheels are installed near the machine head main body; a blade is installed on a discharging port of the neck mould; and a heating ring is installed at the outer ring of the machine head main body. According to the novel plastic grain hot cutting machine head, the structure is simple, the design is reasonable, the operation is simple and convenient, the blade cuts off strip materials, the springs can guarantee that the blade is tightly attached to the neck mould to cut off the squeezed strip materials while the strip materials are hot, the operation is stable, the service life is long, frequent maintenance and frequent part replacing are not needed, and the use cost is lowered.

Description

technical field [0001] The invention relates to the technical field of plastic granulation equipment, in particular to a novel plastic hot granulation machine head. Background technique [0002] In the granulation method of plastic granulation equipment, the application of surface-touching thermal granulation method is very common. According to the different cooling media, it is divided into water ring granulation and air ring granulation, but the thermal granulation head used by both is the same, because It is to extrude the melted plastic through the small hole of the mouth template and then directly cut into pellets, so whether the discharge of the mouth template is stable or not will directly affect the shape and size of the cut particles, among which the shape of the splitter cone in the hot pelletizer head and its relationship with The flow channel formed in the inner cavity of the machine head is the key factor determining the stability of the die plate discharge. For...

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Problems solved by technology

[0002] In the granulation method of plastic granulation equipment, the application of surface-touching thermal granulation method is very common. According to the different cooling media, it is divided into water ring granulation and air ring granulation, but the thermal granulation head used by both is the same, because It is to extrude the melted plastic through the small hole of the mouth template and then directly cut into pellets, so whether the discharge of the mouth template is stable or not will directly affect the shape and size of the cut particles, among which the shape of the splitter cone in the hot pelletizer head and its relationship with The flow channel formed in the inner cavity of the machine head is the key factor determining the stability of the die plate discharge. For conventional materials, the splitter cone is generally conical or parabolic, and most of them can ensure the stable discharge of the die plate. For mineral filler materials with a high amount of addition, especially when the particle size of the mineral material added to polypropylene is more than 2000 mesh, it is difficult for the above-mentioned shape of the splitter cone to ensure the stable discharge of the die plate, and it will appear in the production that the die plate is evenly distributed around the mouth plate. Only part of the discharge hole is discharged or the discharge is fast or slow, resulting in different lengths of the cut particles. In severe cases, most of the discharge holes of the die plate will be blocked, causing an overpressure alarm for the melt pressure in the machine head. Affect the normal operation of the entire production line

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