Two automatic feeding devices for large hollow blow molding machines

At present, the commonly used automatic feeding equipment mainly includes a vacuum suction type automatic feeding machine and a spiral tube type automatic feeding machine.
1. Vacuum suction type automatic feeding machine
The vacuum suction type automatic feeding machine is operated by a thirst quenching air pump, and the loading machine hopper is vacuumed to form a negative pressure, and then the air flow characteristics are used to realize the feeding of the plastic raw material.
The working principle and working process of the vacuum suction type automatic feeding machine are as follows: when the plastic material level in the extruder hopper is lowered, the level sensor or the level switch sends a signal to the vortex air pump to automatically start and evacuate the air in the hopper. Negative pressure, the plastic material is sent to the hopper under the action of atmospheric pressure. When the preset level is reached, the vortex pump stops and enters the next cycle. The vortex air pump is a vacuum pump that is currently used more, and has a small power and high efficiency, and can perform such work well. Due to the particularity of the extrusion hollow molding, there are more recycled materials in the raw materials used, so the automatic feeding machine used is different from the loading machine of the injection molding machine, and should be able to overcome the influence of the plastic powder and be normally loaded. . Vacuum suction automatic feeders for hollow blow molding machines should generally be equipped with dust removal devices. At present, there are only a few manufacturers in China that vacuum feeders are equipped with a compressed air automatic dust removal device, which can automatically remove dust during each loading cycle.
The degree can reach about 8m, and the actual amount can reach more than 600kg/h, which can achieve the continuous operation and operation of the feeding machine, thus ensuring the continuous operation of the hollow blow molding machine. In the process of using the vacuum suction automatic feeder without automatic dust removal device, it is necessary to manually clean the dust and keep the seal in time to make the performance stable and keep the environment clean.
Large hollow blow molding machine automatic feeding equipment
2. Spiral tube automatic feeding machine
The spiral tube type automatic feeding machine drives the stainless steel wire coil spring to rotate by the motor placed on the extruder hopper, and the plastic material is brought to the hopper to realize the feeding.
The working principle and working process of the spiral tube automatic feeding machine are as follows: when the plastic material level in the hopper on the extruder drops, the level sensor or the material level switch sends a signal, and the motor starts to drive the coil spring to operate, and the plastic material is taken. When the plastic material reaches the preset level, the motor stops and goes to the next cycle. At present, the spiral tube type automatic feeding machine can be used for large hollow machines with a vertical height of 6m or less, which has the advantages of stable feeding, less dust generation, and less strict particle size requirements of the side waste plastics, but stainless steel wire coil springs. And plastic hoses are more prone to wear and failure, requiring maintenance and maintenance.
From the situation that many domestic factories use automatic feeding equipment for the feeding of hollow blow molding machines, from the aspects of cost performance, maintenance and so on, when the vertical feeding height is below 6m, vacuum suction type automatic can be selected. Feeding machine and spiral tube type automatic feeding machine; when the vertical feeding height is above 6m, only the vacuum suction type automatic feeding machine can be selected.