Energy saving and environmental protection printing machine

Abstract

The invention relates to an energy-saving and environment-friendly printing machine, comprising a machine body and a drying device (10), characterized in that: the drying device (10) includes an oven cover (20), a base (50), and is provided with a printed product inlet (03), a printing product outlet (04); the oven cover (20) is provided with a drying chamber (13) and a recovery chamber (14); the oven cover (20) is provided with an air supply unit (60), a heat pump condenser (88), a refrigeration The evaporator (96); the air supply unit (60) includes a fan (30), which is provided with an air inlet channel (63), an exhaust air channel (64), and an air outlet channel (68), forming a gas purging and circulation system; heat pump The condenser (88) is installed in the air supply unit (60), and the refrigeration evaporator (96) is installed in the recovery chamber (14). The present invention firstly transforms the drying equipment, replaces the original air duct with complex structure and single function by the smart air duct inside, and achieves the effects of compact structure, space saving and material consumption reduction.

Description

technical field [0001] The invention relates to a printing machine, in particular to an energy-saving and environment-friendly printing machine. It belongs to the field of printing technology. Background technique [0002] At present, packaging printed matter is generally in the form of a roll, and is usually printed continuously by gravure printing machine or flexo printing machine. The printed matter needs to be preheated before printing, printed matter needs to be dried during the printing process, and printed matter needs to be cooled after printing. [0003] The current printing machine, including gravure and flexo, is dried by hot air blowing, that is, the air is heated and then blown to achieve the purpose of drying the printed product, and the preheating is completed in a similar way to drying. Cooling is mostly done with chill rolls. [0004] The preheating, drying, and cooling of current printing machines all have the disadvantages of complex structure, large vol...

AI Technical Summary

Problems solved by technology

However, this improvement scheme still has the following problems: 1. In order to control the cost of the device, the waste gas flow rate needs to be reduced, resulting in a more prominent explosion hazard; 2. In the process of waste gas treatment, a huge amount of additional energy is consumed, and the operating cost is high; 3. Activated carbon or activated carbon fiber is a consumable, which needs to be replaced regularly, resulting in an increase in cost and affecting production; 4. The desorption process will cause water pollution; the equipment is complex and bulky, occupying more valuable production sites, and causing more damage to the renovation project. 5. It does not help to improve product quality and avoid environmental impact on the production process

[0012] However, an in-depth analysis of the patent document found that the provided equipment has a complex structure, low energy utilization efficiency, lack of good cooperation with processing equipment, high equipment costs and operating costs, making the patent document lack of practicability

[0013] To sum up, the current drying equipment has the following disadvantages: 1. The drying gas enters and exits at the same time, which is difficult to meet the drying process requirements

2. The air blowing stroke is short, the air flow is small, the drying efficiency is low, the box is too long, and the control is difficult

3. Low heat utilization efficiency, excessive energy consumption and high operating costs

4. The air duct is complex and has many interfaces, the gas is easy to leak, the fan noise is loud, and the environmental protection is poor

5. The structure is complex, bulky, consumes a lot of steel, and the manufacturing cost is high

6. It is troublesome to install and transport, the cost is high, and it takes up a lot of space in the factory building

7. Organic solvents are harmful to the human body and the environment, and direct discharge will cause pollution

8. There are extremely economically valuable organic solvents and a large amount of heat in the exhaust gas, which cannot turn waste into treasure, resulting in high production consumption and reduced processing efficiency

9. In order to reduce the energy consumption of heating air, it is necessary to reduce the flow of fresh air, but it will cause the concentration of organic vapor to exceed the explosion limit and cause an explosion accident, which poses a serious safety hazard

10. A large amount of natural air is used, which makes the processing and production subject to the climate environment. When the ambient temperature is low, the energy consumption required for heating is huge, and even the drying needs cannot be met, resulting in production shutdown

11. The dust in the natural air affects the processing quality of the product

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