The compressed air technology of Confucianism and PET bottle processing system in the plastics industry, especially in the PET (ethylene terephthalate) bottle manufacturing workshop, is indispensable for the demand of compressed air.
In the PET industry, the demand for compressed air is very special.
The PET bottle processing equipment uses high pressure air during the mold blowing process. The cylinder part of the equipment also needs to compress the air to drive a variety of components. Due to the different requirements for compressed air, taking into account the needs of other workplaces for compressed air in the workshop, it is very important to choose a complete, reliable and energy saving compressed air system.
Because of the over supply of PET resin in the market, the price is becoming cheaper and cheaper. This will make the manufacturer of packaging products take the PET bottle instead of other packaging form for economic consideration.
In the PET industrial application, there are two uses for compressed air. They are gas for working gas and mold blowing. The production equipment suppliers have detailed requirements for the gas demand for working gas and blowing mould gas.
Preparation of a universal bag, it can be blown PET container through the simple exchange mode. Because the gas fluctuation will not only affect the selection of compressor, but also will affect the selection of the low pressure compressor, so we must determine the maximum air pressure of the air bag.
Used to drive the gas cylinder, the pressure according to the different types of PET equipment, generally in the 0.7~lMPa (7 ~lObar) gauge between.
The air blowing is mainly based on the mold size to extend the heated premolded parts and mold the mold. Depending on the capacity of the bottle / container, the amount of gas required will change. The physical characteristics of pressure and production out of the bottle / container by gas blowing mould, which is generally in the range 1.5- ~43bar) gauge fluctuation.
Higher pressure is required for the production of both hard and thick containers, and lower pressure is required for the production of soft and thinner bottles / containers.
It is precisely because of this combination of gas and blow molding gas for different pressures that we can introduce Kaiser's unique design plan in this field.
This design is a complete, overall scheme, which provides the best combination efficiency scheme for the initial investment and operating costs. In a word, this scheme is designed specifically for the overall reliability and maximum productivity of the user.
In the design of the compressed air system for the PET workshop, the following points should be made clear: the most important thing is to find out the scope of the bottle to be produced. The company may need low pressure compressed air at the beginning, and then need to use high pressure compressed air, or the opposite of this application. This problem will become more complicated if the workshop is turned from a smaller bottle / container to a larger bottle or container.
Although such production modification or product growth is limited by the maximum capacity of the equipment, the workshop must be able to adapt to such a product modification or increase. Once this information is obtained. The maximum air volume and maximum pressure of high pressure air can be determined.
The second key points to be determined are the gas and the lowest pressure of the low pressure working gas. The determination of this point will help to determine the theoretical population pressure of the turbocharger and the theoretical inlet air under the pressure. Through this information, the total gas amount of the low pressure working gas and the configuration of the turbocharger can be determined.
However, please note that the pressure of the turbocharger will increase when the pressure of the suction side of the turbocharger increases. Due to the control of gas demand is not very high, so that the choice of a pressure point is utilized to control the supply of gas in low pressure side.
It is necessary to consider the spare unit when selecting the turbocharger. If this is difficult to achieve due to the constraints of the budget or installation space, the specifications of the turbocharger should be guaranteed to the maximum of no more than 60% of the operating factor.
When selecting the low pressure screw air compressor, when the working pressure is higher than the inlet pressure required by the selected supercharger, the surplus air capacity that the existing air compressor can provide should be considered. The excess gas can be used to compensate the gas required for the low pressure inlet side of the turbocharger. In the overall control of the design workshop, the model and manufacturer of the existing air compressor should also be taken into account.
In the selection of several schemes, the minimum initial investment and long-term operating cost should be considered. Screw type air compressor working pressure should be at least lMPa (lObar) gauge.
After analyzing and confirming the above points, Kaiser can design a perfect compressed air supply system that is composed of screw air compressor, supercharger and dryer and filter, and achieve safety and reliability. Efficient operation to meet the increasing demand for PET processing industry and related industrial scale.
It is particularly worth mentioning is that the unique design of Kaiser compressor, suitable for air entrance pressure range of 0.5 in the PET processing industry and related industries in the field of applied widely, but also play the leading role in the safe, reliable and improve productivity.