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Selection of Working Mode of Automatic Injection Blow Molding Plastic Machinery

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Automatic Injection Blow Molding Plastic Machinery
       
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5.5.3 Selection of working mode of the machine
     There are three kinds of modes: manual, semiautomatic and automatic mode, as shown in Fig.12 (32), (34), (36). Pressing one of them, the corresponding lamp is turned on, indicating the mode has been selected.

(1) Manual mode:
     When starting the Automatic Injection Blow Molding Machine, PLC sets it to the manual mode automatically. If necessary to change from others mode to the manual mode, press the manual operation selection button once, and the upper lamp is on. When press the button on the manual operation panel (shown as Fig.11), if there is a corresponding action, a "bi" will sound from the buzzer and the corresponding lamp on. If no action, no voice sound and no lamp on.
     In the manual operation mode, the following must be paid attention to:

a. The blow mould closing: Only when the blow mould has been at the limit position of up quickly or up slowly, and the unrod air cylinder (at the limit position of out)is out, would the blow mould closing be operated.
b. The screw mould moving down: Only when the blow mould has been at the limit position of opening and closing, and the unrod air cylinder is out, would the screw mould moving down be operated.
c. The unrod air cylinder entering the center of the blow mould: Only when the blow moulds have been at the limit position of opening, and the screw mould at the limit position of up quickly, would the action have happened.
d. The screw mould moving up: The blow mould is at the limit position of opening.
e. In the manual mode, the action of the unrod air cylinder is not restricted by the unrod air cylinder selection button on the display operation panel.

(2) Semiautomatic operation:
     Pressing the semiautomatic operation selection button, the corresponding lamp is on. The operation can carry out only one cycle process, for next cycle, you must be press this button, then carry out one cycle process again. The working process can not select the unrod air cylinder.

(3) Automatic mode:
     Pressing the automatic selection button, the corresponding lamp is on, but the Automatic Injection Blow Molding Machine must be worked with the unrod air cylinder together, or it won't run, in this mode, after one process cycle, the Automatic Injection Blow Molding Machine automatically goes on to the next cycle.
     In the process of semiautomatic or automatic operation process, the lamps on the panels(Fig.11, 12) display the operation process. The indicating lamps for alarm(Fig.12 56-65) can be used to find out the trouble source, every lamp stands for different trouble. In the modes, except the one caused by an excess of the number of real injection times over the preset, all the alarms can cause the Automatic Injection Blow Molding Machine stop, and only after the trouble have been solved the Automatic Injection Blow Molding Machine could be put into use again.

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