How to adjust the production speed and temperature of the automatic bottle blowing machine?

1. Temperature adjustment of automatic bottle blowing machine

When the automatic bottle blowing machine is processing, some temperature control must be paid attention to to ensure that a suitable plastic bottle is manufactured.

1. Melting temperature TM: For crystalline polymers, it refers to the temperature at which the three-dimensional remote ordered state of the macromolecular chain structure transforms into a disordered viscous fluid state, also known as the melting point. It is the lower limit of the crystalline polymer molding processing temperature.

2. Glass transition temperature TG: refers to the transition temperature of an amorphous polymer (including the non-crystalline part of a crystalline polymer) from a glass state to a high elastic state or from the latter to the former. It is the lowest temperature at which the macromolecular segment of the amorphous polymer can move freely, and it is also the upper limit of the working temperature of the product.

3. No-flow temperature: the highest temperature at which no flow occurs under a certain pressure. The automatic bottle blowing machine is to add a certain amount of plastic into the barrel at the upper end of the capillary rheometer die, heat it to a certain temperature, and apply a constant pressure of 50MPA after the constant temperature is known to be new. If the material does not flow out of the die, unload it. After pressing, it is difficult to increase the temperature of the material by 10 degrees. After holding for 10min, apply the same constant pressure, and continue until the melt flows out of the die. Decrease this temperature by 10 degrees to be the no-flow temperature of the material.

4. Flow temperature TF: refers to the temperature at which the amorphous polymer changes from a highly elastic state to a viscous flow state. It is the lower limit of the processing temperature of amorphous plastics.

5. Decomposition temperature TD: When the temperature of a polymer in a viscous fluid state is further increased, the degradation of the molecular chain will be aggravated, and the temperature at which the molecular chain of the polymer is significantly degraded is the decomposition temperature
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