Introduction

Nowadays, almost all bottles used for the beverage market are manufactured by the SBM machine. Reheating is a significant step in the SBM process, which is also necessary for heating the preform to the appropriate temperature distribution above the glass transition. Finally, a bottle is produced by stretching and blowing inside a mold [1–۷]. Remarkably, this stage is performed using infrared (IR) heaters. The IR heater is a stable heating source which is easy to use and adjust. On one hand, using an infrared lamp is necessary to obtain the utmost infrared radiation with a smaller amount of electric power. On the other hand, the entire system heating box will increase the temperature, which leads to shortening the working time machine. The most important point is how to design and use the cooling system without affecting the heating system. The power of the lamps is always at 1000 and 2000 W; therefore, if the heating system works for a long period, the machine will get high temperatures to continue functioning. Due to the high fan speed, the temperature of the preform will drop, which causes of effecting the crystallization and orientation of the molecules within the bottle’s walls [8]. The analytical approach is to calculate the heat flux from an analytical solution of the one-dimensional transient energy equation with a transient boundary condition using the Laplace transformation [9]. The space and time-dependent heat flux [10–۱۲] at the upper wall is estimated from the temperature measurements taken inside the flow [13]. On production, the considerable effect of temperature distribution decides the material thicknesses on the bottle [14] and the deformation of a bottle after blowing.