Working principle of plastic blow molding machine

The working principle of the whole system of the automatic plastic blow molding machine is relatively simple. Since only the stretching cylinder and the pre-blowing part are required, the installation structure is also very convenient. Different capacity bottles should grasp the relationship between supply and demand. Although this system only provides recycled gas to the two parts of stretching and pre-blowing, it seems to be a bit of a fly in the ointment, but its investment is small (take SBO10/14 as an example, only about 20,000, depending on the price of accessories), and the return is large (annual Cost savings of 160,000 to 200,000 yuan), strong independence (the original gas supply system can be used when there is a fault or other reasons), and high flexibility (simple and convenient installation), which is in line with the basic principles of our technical transformation project, making the product more With market competitiveness. When the machine is idling and the bottle is not blown, the low-pressure gas passes through the solenoid valve of the original pipeline to the gas storage pipe of the stretching cylinder, and the recovery gas storage pipe and the gas storage pipe of the stretching cylinder are isolated by a one-way valve. At the same time, the entire stretching air system and pre-blowing system are kept as they were before modification. When the equipment starts to blow the bottle, the high-pressure gas in the bottle enters the recovery gas storage pipe 6 through the exhaust pipe of the three-way valve 10 and the one-way valve 12. After the equipment runs for a circle and recovers enough gas, the manual solenoid valve 1 is used to close the original puller. Stretch the low-pressure intake and pre-blow intake lines. At this time, the stretching cylinder and the pre-blowing air are supplied by the recovery air storage pipe. Due to the different volumes of the produced bottles (0.6L, 1.25L, 2.0L, etc.), we can properly Open the exhaust valve 9, discharge the excess air volume from the muffler, and maintain the balance between the recovery air volume and the consumption air volume. If there is still residual air in the recovery air storage pipe, it will be discharged through the 15bar safety valve 4, so the safety valve must have enough The flow rate can allow the excess gas to be discharged. When the bottle is stopped, the manual solenoid valve is opened to supply air from the original low pressure and pre-blowing lines.
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