Processing plastic bottles with automatic blow molding machine This is a common processing project in plastic processing, so in this process to focus on the aspects of where? What I'm going to tell you is that temperature, temperature grasp is very important for processing plastic bottles.
In the operation of hollow blow molding machine for processing, it is necessary to pay attention to some temperature control to ensure the manufacture of suitable plastic bottles. Non-flowing temperature: the maximum temperature at which the flow does not occur under certain pressure. Is to add a certain amount of plastic to the capillary rheometer mouth mold upper end of the cylinder, heating to a certain temperature, constant refresher 10MIN, the application of 50MPA constant pressure, if the material does not flow out of the mold, after unloading the material temperature increase difficulty 10 degrees, insulation 10MIN after the application of the same size of constant pressure, So continue until the melt flows out of the die, reducing this temperature by 10 degrees is the non-flowing temperature of the material. Flow temperature TF: Refers to the temperature at which an amorphous polymer changes from a high elastic state to a viscous flow state.
Is the lower limit of the processing temperature of unshaped plastics. Decomposition temperature TD: Refers to a polymer in a viscous flow state when the temperature increases further, it will aggravate the degradation of the molecular chain, rising to make the polymer molecular chain significantly degrade when the temperature is decomposition temperature. Melting temperature TM: For crystalline polymers, the three-dimensional remote ordered state of the large molecular chain structure is transformed into the temperature of the disordered viscous flow state, also known as the melting point. Is the lower limit of crystalline polymer molding processing temperature. Vitrification temperature TG: Refers to the transition temperature of an unshaped polymer (including a 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 of free motion in the non-stereotyped polymer macromolecular chain, and also the upper limit of the working temperature of the product.