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Committed to stable performance automatic bottle production line since 1990s

A blow molding machine manufacturer specializing in the development and production of PET materials blows plastic containers of various PET materials

by:Yosion Machinery     2021-06-29
The principle and maintenance of the bottle blowing machine: The principle of operation of the bottle blowing machine: After spraying the liquid plastic, the bottle blowing machine uses the wind blown out of the machine to blow the plastic body to a certain shape of the mold cavity, and then make the product. This kind of machine is called a bottle blowing machine. Blowing process: 1. The preform (embryo) is irradiated by infrared high temperature to heat and soften the body (embryo) of the preform (embryo) to maintain the shape of the bottle mouth. The mouth of the preform (embryo) is never needed It is heated, so it needs a certain cooling device to cool it; 2. This stage is to place the preheated preform (preform) into the ready blow mold, and perform high-pressure inflation inside it. Blow and pull the preform (embryo) into the required bottle. Blow molding machines are mainly divided into three categories: extrusion blow molding machines, injection blow molding machines and specific structure blow molding machines. The processing technology is mainly divided into one-step method and two-step method. The molding process of one-step and two-step blow molding machines is mainly used for the molding of PET and BOPP hollow containers. Both have their own characteristics and are widely used. Compared with each other, the two-step method is more and more suitable for dispersively producing preforms and dispersively blowing bottles; therefore, the one-step method is more and more suitable for online production in beverage companies. The blowing process of the bottle blowing machine has 6 important steps: 1) Put the heated plastic embryo into the mold first; 2) Use the clamping cylinder to tighten the mold; 3) Use high pressure or mechanical structure again. The embryo mold is locked; 4) medium and high pressure pre-blowing, in addition to stretching the cylinder action to expand the mold; 5) high pressure blowing, the preform is shaped according to the mold, and the pressure is maintained for a certain period of time; 6) The high pressure in the medium is released, and the cylinder is reset-take the bottle. Pneumatic equipment is used in many places during the operation of the bottle blowing machine; self-discharging-locking-stretching-high-pressure blowing \ deflation-taking out the bottle, this series of actions are all completed by the assistance of pneumatic equipment. For example, the air circuit is divided into two parts, the normal pressure part and the high pressure part. Maintenance: 1. Never feed material at the feeding position: There are several conditions that need to be checked: whether the hopper is empty, If yes: need to feed quickly. Never: please check whether the control contactor of the hoist is in the energized state, if it is in the energized state, quickly check whether the motor is energized and the load state, because this situation is very likely to be changed by the bottle The blank (embroid) is stuck in the lifting belt. At this time, the most intuitive method is to naturally help the lifting. If you check that the control contactor of the hoist is never energized, please check whether the preform detection electric eye and the reflector are never on the same straight line. 2. Feeding old card feeding tray: This situation is a more painful problem. From experience, if the length of the preform (preform) is longer and the weight is smaller, then this phenomenon is more difficult. 3. After the bottle is blown, it must not be taken out of the mold. The mold should be opened first, and the mold should be opened and closed manually. If it is stable, run it in a dry running state, if it is also stable. Please check your exhaust time setting. If the exhaust setting is stable, and if the two blows fail each time, then it can be judged that the exhaust valve is the problem. Please open the exhaust valve to check the condition of its spring and seal (this Another kind of failure is that the exhaust sound is low or there is a dirty sound). If you are encountering a situation where many Lie algebras are stable and coincidentally, the mold cannot be opened. Please check whether the clamping pin has a screw in it. In addition, please check whether the clamping force is very small, if it is very small. Should be adjusted again according to the standard. 4. Whether the position where the bottle is always pinching the manipulator is misplaced. 5. If two manipulators collide with each other, it is necessary to reset the manipulator again automatically because of misalignment.
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