A control method for the pelletizing thrust control system of an air-path hot cutting machine

Abstract

The invention provides a control method of an air circuit type control system for dicing thrust of a hot cutting machine. The control system comprises a master control module, a proportioning valve, an air cylinder, a cutter bit and a measuring cell, wherein the proportioning valve, the air cylinder, the cutter bit and the measuring cell are connected with the master control module, and the proportioning valve is connected with the air cylinder. The control system is novel in design, simple and efficient, and is well improved on the basis of the existing hot cutting machine, and a hydraulic type is replaced with an air circuit type; and during dicing thrust application, the thrust is applied to the cutter bit of the hot cutting machine, the cutter bit is attached to a die head, and dicingis achieved. According to the control method, control precision is high, first-order closure feedback regulation is adopted, the contact force of blades and the die head can be regulated and controlled accurately, the fact that the blades can conduct dicing and the friction force between the blades and the die head is the minimum is guaranteed, damage to the blades is reduced to the minimum, and the control system is made more stable.

Description

technical field [0001] The invention relates to the technical field of heat cutting machine control, and more particularly, to a control method of a pelletizing thrust control system of a pneumatic heat cutting machine. Background technique [0002] As we all know, the underwater pelletizer is a new type of high-molecular polymer semi-finished product processing machine. Because its cutting process is carried out in water, it is named after it. Since the strip does not need to be cooled during the dicing process, in order to distinguish it from the water-drawn strip granulator, we also call it a hot cutter or a grinder. At present, this equipment is mainly used in the production of polypropylene (PP), nylon 6 (PA6), elastomers and other products. Its main feature is that the equipment and its ancillary equipment occupy a small area, the particles do not need to be overcooled during the production process, and can achieve high temperature granulation of 90 degrees, which sav...

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Problems solved by technology

[0004] Firstly, the cutting thrust of the existing hot cutting machine mainly uses the hydraulic system to provide thrust support, the effect is not very good, and the cost is relatively high; and the existing hot cutting machine has not yet tried to use the air system to replace the hydraulic system, so it has Certain limitations;

[0005] Second, the control system of the existing cutting thrust of the hot cutting machine is not perfect, the control method is not good enough, and the control accuracy is not high, so that the cut material particles cannot meet higher requirements, and waste resources and costs. Intelligent and Low degree of automation, not suitable for wide-scale popularization

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