Como elixir unha extrusora de plástico

When users use máquinas de moldeo por inxección e moldes, we inevitably need to use plastic extruder
The selection of extruder mainly refers to the following technical parameters:

Screw diameter refers to the outer diameter of the screw thread. Expresado por D, the unit is mm
The length-to-diameter ratio of the screw refers to the ratio of the length of the screw thread to the diameter of the screw, expressed in L/D.
The speed range of the screw refers to the highest and lowest number of revolutions when the screw is working
Motor power refers to the power of the motor that drives the screw to rotate, represented by P
Barrel heating power refers to the electric power when the barrel is heated by resistance, the unit is KW

In the case of the same configuration, it depends on the quality and workmanship

It is best to buy a máquina para inspeccionar a escala e a resistencia da fábrica. Deséxoche boa maquinaria e equipamento
2.Que facer se a temperatura do porto de descarga da extrusora de plástico é demasiado alta

Hai unha camisa de auga do barril baixo a abertura de alimentación, unha entrada e outra saída, principalmente para evitar que a temperatura do barril sexa demasiado alta, formando un fenómeno ponte, e existe o dereito de instalar a auga circulante na caixa reductora. A función é evitar que a temperatura sexa demasiado alta.
Se es un pellet de baixa presión, non é necesario aumentar demasiado a temperatura da tolva, polo que a temperatura do porto de descarga tamén baixará. Se a situación aínda non mellora, recoméndase instalar un controlador de temperatura do molde para manter a temperatura do parafuso nun valor constante.

3.Por que se rompe o parafuso da extrusora de plástico?

É necesario analizar detalladamente as trazas da sección rota. Se hai escuma metálica fina ou barro metálico preto, é causado pola fricción a longo prazo. Observa se hai un lugar onde poida producirse rozamento. Se a sección está limpa e nova, pode ser causado por un fallo repentino.

4.Como calcular o volume de extrusión dunha extrusora de plástico

Para unha extrusora, se é un parafuso simple ou un parafuso dobre, hai que explicar dous conceptos no que se refire á capacidade de extrusión:
1. Extrusión límite teórica
2. Volume de extrusión real

O límite teórico de extrusión calcúlase pola xeometría do parafuso (cross-sectional area of ​​the internal space of the barrel-cross-sectional area of the screw = cross-sectional area of ​​the runner) and then multiplied by the lead of the large-lead screw element in the feeding section. With the main engine speed, all in international standard units, the obtained m³/h is the theoretical limit extrusion volume at this speed.

The actual extrusion volume does not need to be calculated. En xeral, it is metered feeding. The extrusion volume is the feeding volume you set. If it is hungry feeding (in fact, it is rare because the feeding amount is not stable enough), it needs to combine the characteristics of the material, such as powder or pellets, what is the fluidity of the solid particles, and the structure of the feeding device The size is related, but usually the actual extrusion volume of solid starvation feed will not exceed 80% of the theoretical limit extrusion volume

When designing the metering feed volume, it is usually more appropriate to be 60% of the theoretical limit extrusion volume, and there is no need to adjust the feed volume within a certain host speed range.

Hope it will be helpful to everyone, haha, I wish you success.
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