Process optimization control of large hollow blow molding machine
When the equipment has been determined, it is also one of the important measures to save energy to optimize the process. On the basis of ensuring the normal molding of the product, appropriately reduce the molding temperature of the product, reduce the blowing pressure, reduce the pressure of the hydraulic system, adjust the flow output of the hydraulic system, improve the operating condition of the cooling water, improve the operation method, and increase the unit time. Technical measures such as productivity and improving the first pass rate of products can effectively reduce the energy consumption of blow molding equipment.
So far, there has been great technical progress in organically combining equipment, molds, molding processes, plastic raw materials, and other aspects to effectively reduce the energy consumption per unit product and increase the comprehensive benefits of large-scale industrial plastic blow molding products.
Process optimization control of large hollow blow molding machine
As shown in the figure, it is a high-speed and energy-saving double-station large-scale hollow blow molding machine. The design of this high-speed and energy-saving double-station large-scale hollow blow molding machine is carried out in accordance with the principle of efficient design of equipment. The main purpose is to improve the productivity of a single large-scale hollow blow molding machine, reduce the energy consumption of each product, and improve the molding efficiency. . It is equipped with two high-efficiency IKV structure extruders, two two-plate pin lock mold clamping mechanisms, two sets of manipulators for taking out products, a high-performance storage head, and servo hydraulic system, main hydraulic system, Pneumatic system, automatic electrical control system, equipment rack, two automatic feeders, etc.
The production process of the double-station large-scale hollow blow molding machine is: after the two high-efficiency extruders are started and the plastic parison is pressed out normally, the storage head starts to store the material; the No. 1 clamping mechanism moves to the storage head Move directly below the opening of the core mold of the storage head and press out the plastic parison; after the plastic parison is pressed out of position, the core mold locks and stops pressing; the No. 1 clamping mechanism closes the mold and blows and shapes. At the same time, the products are moved outwards and cooled down. At this time, the two extruders are still running, and the storage head is still storing materials; the No. 2 clamping mechanism moves directly below the storage head, and the storage machine is in place when it is in place. The core mold of the head is opened to extrude the plastic parison; after the parison is squeezed into place, the core mold is locked; the No. 2 clamping mechanism closes the mold to blow and shape, moves to the original location and cools the shaped product. At this time, the No. 1 mold clamping mechanism opens the mold and removes the product, and then moves down the storage head again and enters the next cycle. The No. 1 and No. 2 clamping mechanisms can produce blow molding products of the same specification or two blow molding products of different specifications, but the shapes of the products must be the same type. The wall thickness control curve settings of the product shapes of the No. 1 and No. 2 clamping mechanisms can be the same, or they can be set, controlled, and adjusted separately.
This double-station large hollow blow molding unit has the following characteristics in structure:
1) The main hydraulic system adopts high-efficiency energy-saving hydraulic circuit and multiple accumulators to balance the hydraulic circuit to meet the requirements of the hydraulic pump driven by a smaller motor to output hydraulic power.
2) The guide rail of the two-plate clamping mechanism adopts rolling linear guide rails, and the movement is stable.
3) The high-pressure mold clamping is performed by multiple hydraulic cylinders, which is energy-saving and the clamping force is relatively uniform.
4) The servo hydraulic system uses multiple high-pressure energy storage devices to store energy, which can make the parison curve control accuracy reach a high level and also save energy.
5) The clamping mechanism can be moved out, and it is very convenient and safe to replace the mold.
6) Considering that the storage head is fed by two sets of extruder equipment, the equipment rack swings greatly at higher speeds, so the equipment rack is designed to be fixed to increase its stability and reduce equipment. Manufacturing costs.
When using this high-speed energy-saving double-station large-scale hollow blow molding unit to produce blow molded products, the production cycle is short and the efficiency is high. A large blow molded product can be formed in about 3 minutes, which is more than similar equipment that currently has a faster molding speed in China. The production of 40% of products has a variety of market competitive advantages such as low energy consumption, high shift production, low labor costs, and low production workshop management costs. At present, there are patents of such equipment in China. This kind of high-efficiency and energy-saving large blow molding equipment deserves further in-depth research and development.