Taizhou Fupusi Machinery Co., Ltd.
The stretching part of the bottle blowing equipment is installed inside the machine, and its direct acting parts are stretching rods arranged at equal intervals. In the original state, the stretching rods are below the fixed head shaft of the bottle preform and are aligned with the center of the mold cavity. During the bottle blowing process, the stretching rods are stretched quickly, enter the bottle preform through the hole in the bottle preform head shaft, and then push the top of the bottle preform upward to help the bottle preform expand and form evenly under the action of high-pressure air. Based on process requirements, the stretching rods must move quickly, position accurately, have low noise and low vibration, and the stroke and speed can be precisely adjusted according to the needs of different bottle types.
Replacement of stretch rod
Reasons for disassembly and assembly of stretch rod:
1. The size of the tooth of the bottle embryo changes;
2. The inner diameter of the bottle embryo changes;
3. The size of the bottle or bottle shape changes.
Disassembly and adjustment steps of stretch rod:
1. Use the human-machine interface to move the stretch rod to the appropriate position;
2. Rotate the bolt to unscrew the stretch rod from the stretch rod connecting sleeve;
3. Remove the bottom screw of the stretch rod connecting sleeve and remove the stretch rod connecting sleeve;
4. Take out the stretch rod from top to bottom. The method of installing the stretch rod is the opposite.
Taizhou Fupusi Machinery Co., Ltd.
- The mold is in the open state, and the sealing and stretching are both in the lower position. This is the initial state;
- After the preform is in place and the mold is closed, the sealing cylinder moves upward, and the front sealing ring is pressed against the lower end face of the preform head shaft to complete the sealing. This is the mold closing and sealing state;
- The sealing cylinder begins to pass high-pressure air into the preform, and at the same time the stretching servo or cylinder is started, the stretching rod rises to the preset height, the bottle body expands and forms, and the pressure in the bottle is maintained until it solidifies. This is the stretching and blowing state;
- The exhaust valve controls the exhaust, the sealing cylinder resets the mold to open, the stretching servo resets, and the stretching rod returns to the lower position. This is the open mold reset state. At this point, a cycle of movement is completed, the transmission system is activated, the finished bottle is moved out of the mold cavity, and the preform to be blown is sent into the mold cavity to enter the next action cycle.
Including stretching group, sealing group, blowing group
The stretching group uses a stretching cylinder or servo motor to move the stretching rod up and down.
The sealing group allows the teeth to maintain the same pressure inside and outside to prevent the teeth from deforming.
During pre-blowing, the blowing group injects low-pressure air while the stretching rod rises. After a period of pre-blowing, high-pressure air is injected to form the bottle.