should be noted that in real practice the control section may be configured such that a user can choose whether or not to use the pid control the present apparatus allows the interior temperature of the kneading chamber 5 to be maintained over a predetermined period of time enabling the production of masticated rubber with sufficiently high plasticity solely by mechanical mastication since this eliminates the need for the chemical mastication using a peptizer the chemical amount of masticated rubber becomes almost fully homogenized and thus stabilizing the chemical properties of the masticated rubber product the following examples provide detailed explanations on more specifics of the effects now a kneading is explained fig4 is a flow chart depicting the flow of a rubber processing method a kneading method conducted in the present apparatus 1 a rubber component silica and a silane coupling agent are charged into the apparatus 1 step s 11 values are inputted for the target temperature u201c ts u201d and for the control set time u201c tm u201d step s 12 and the control section 11 starts a pid control of the motor based on these values step s 13 in other words a control signal from the control section 11 determines the rotational speed of the motor and thus determines the rotational speed i e stirring speed of the.