Plastic extruder fused strip detection method and detector

Abstract

The invention discloses a plastic extruder fused strip detection method and a plastic extruder fused strip detector. According to the method, a material strip for detection is placed under a discharging port of a plastic extruder, wherein the material strip for detection is made of a material of a product which is currently produced by the plastic extruder or a material similar to the fusion performance of the product which is currently produced; once a fused strip is generated in the production, the fused strip falls onto the material strip for detection, and the material strip for detection is heated to glass transition temperature thereof through the afterheat of the fused strip, thus the material strip for detection is transformed into a high-elasticity state from a glass state at normal temperature until the material strip for detection is snapped or fused; an alarm is given to the outside when the material strip for detection is detected to be fused. The detector comprises the material strip for detection, a material strip bracket, a contact detector and a sound-light alarming device, wherein one end of the material strip bracket is used for applying an upward or downward pre-tightening force to the material strip for detection. The detector disclosed by the invention is simple in structure, convenient to configure and capable of saving the labor cost, improving the product quality and reducing loss and waste, and has quite high popularization and application prospect.

Description

technical field [0001] The invention relates to the research field of plastic extrusion granulation, in particular to a detection method and a detection device for a fuse bar of a plastic extruder. Background technique [0002] At present, in the production process of plastic extrusion granulation, due to the influence of factors such as unstable raw material properties, uneven mixing, and process fluctuations, abnormal conditions such as broken bars often occur. If broken bars appear abnormally during the production process, and If the operator cannot find out the abnormality and deal with it in time, the broken strip will affect the rest of the strips of the machine head, and eventually form a large piece of material, which not only affects the production progress, but also wastes materials, increasing manpower, material resources and Cost of production. [0003] In order to be able to detect sliver breakage at the beginning of sliver breakage and notify the operator to d...

AI Technical Summary

Problems solved by technology

The detection methods of these alarms are different. Some use infrared detection, some use pressure sensors, and some use conductive rod conduction. Although it is feasible in principle, the above methods are not suitable for plastic extrusion granulation This kind of production process with complicated process and bad working conditions has not been widely promoted.

[0004] The current plastic extrusion granulation broken bar detection alarm mainly has the following three shortcomings: (1) Both infrared detection and pressure sensing have poor anti-interference ability, unreliable system, false alarms caused by misoperation or detection failure Case

(2) Infrared detection, pressure sensor and conductive rod are all relatively sophisticated detection devices, the purchase cost is high, and they are easily damaged during machine cleaning, so they are not practical in plastic granulation production

(3) Both the pressure sensor and the conductive rod are contact detection devices. Plastic condensation on the detection device can easily cause damage to the detection device and cannot be recycled, which will eventually lead to an increase in use costs

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