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High-speed precision injection molding machine energy-saving scheme waste heat recovery treatment

Jun 23, 2020


1. Energy-saving scheme of high-speed precision injection molding machine

 

    The existing high-speed precision injection molding machine molding system is equipped with a dryer for dehumidifying and drying plastics. It uses an electric heating method to provide a heat source. The air discharged from the air outlet of the insulation drying barrel carries a certain amount of heat. If this part of heat is directly discharged into the workshop On the one hand, it will increase the dust content in the workshop air and affect the health of the workers. On the other hand, it will increase energy consumption and increase the economic burden of the enterprise.

 

    In the absence of the existing technology, this article provides a vertical injection molding machine waste heat recovery heat circulation device, a waste heat collection device is installed around the heating section of the melt barrel, using the heat emitted during work to the plastic in the drying barrel Dry and dehumidify. The hot air with a certain amount of water and dust is discharged from the high-speed precision injection molding machine, enters the hot air circulation dehumidification dust filter device through the pipeline, and is processed.After that, part of the hot gas passes through the heat source adjustment fan to provide power for the hot air in the high-speed precision injection molding machine. A flow cycle is generated, and after treatment, it enters the vertical injection molding machine, and then the heat dissipated through the melt cylinder further heat-treats the incoming hot gas; the other part of the hot gas and the heated gas are passed through the high-speed precision injection molding machine, which can pass The air volume adjusts the temperature in the high-speed precision injection molding machine to ensure that the high-speed precision injection molding machine corresponds to the actually set temperature. When the temperature in the high-speed precision injection molding machine is lower than the setting, a signal is sent to increase the rotation speed to increase the output air volume. Under the action of the drive, it enters the vertical injection molding machine.After the high temperature air increases, the temperature in the vertical injection molding machine increases. When the temperature in the high-speed precision injection molding machine is higher than the set temperature, a signal is sent to reduce the rotation speed and the output air volume, so that the high-temperature gas entering the high-speed precision injection molding machine is reduced, and the temperature in the high-speed precision injection molding machine is reduced.

 

2. Existing problems and suggestions for the utilization of waste heat of high-speed precision injection molding machine

 

The problems are as follows:

 

(1) my country's high-speed precision injection molding machine processing enterprises are all over the country, but the technical level of equipment is uneven, and the equipment of many enterprises needs further technical transformation;

 

(2) The ban on plastics in the industry is endless, but plastic products are still widely used in rural markets, and cost reduction has become a top priority for enterprise development;

 

(3) Due to the lack of funds for information dissemination channels and enterprises, the large-scale promotion of this technology has been greatly restricted.Many enterprises lack advanced mechanisms such as energy-saving technologies and clean development mechanisms, and advanced technology service providers at home and abroad have no way to understand the situation of enterprises;

 

(4) The high-temperature waste heat utilization technology of high-speed precision injection molding machines has been relatively mature after many years of development. Successful cases also show its economic benefits, but the use of low-temperature waste heat in high-speed precision injection molding machines with great potential needs further development.

 

Related suggestions are:

 

(1) The high-speed precision injection molding machine production enterprise shall manage and use "correct use, scientific management, careful maintenance, regular maintenance, reasonable lubrication, planned maintenance, improve the equipment intact rate, and keep the equipment in good condition";

 

(2) Pollution energy consumption is also a top priority. As one of the main forces in the energy-saving transformation of vertical injection molding machines, heat utilization should introduce more active policies, provide corresponding financial support, and guide enterprises to waste heat from high-speed precision injection molding machines. The recycling industry plays an active role;

 

(3) Carrying out research on waste heat resources of high-speed precision injection molding machines, collecting relevant advanced technologies, management, and cases to strengthen information dissemination, strengthening research on the utilization of low-temperature waste heat in high-speed precision injection molding machines, and promoting the application of high-speed precision injection molding machine waste heat technology.

 

(4) It is recommended that companies with the potential for utilization of the residual heat of the vertical injection molding machine try to achieve comprehensive system consideration, overall improvement, and focus on the refined use of automatic control systems.

 

3. Economic benefits

 

(1) The high-speed precision injection molding machine system saves 15% to 35%, and the dryer saves more than 90%;

 

(2) High temperature resistance 270℃~280℃, low temperature resistance-70℃;

 

(3) The temperature of the workshop of the high-speed precision injection molding machine can drop by 3°~8°, and the working environment is greatly improved;

 

(4) Carbon dioxide emissions are reduced by 45% to 50% compared with conventional ones and there is no SO2, fly ash, ash and NOx emissions;

 

(5) Tensile strength ≥0.02MPa;

 

(6) Corrosion resistance, aging, waterproof, oil-proof, oil-proof, environmental protection, no pollution;

 

(7) Easy installation, maintenance, good toughness, easy to bend and bandage;

 

(8) Suitable for high-speed precision injection molding machines with different temperatures and shapes.