EPS Continuous Pre-expander with First and Second Expansion
Application of continuous pre-expander
The pre-expander has two main functions: to expand the EPS granules, and to control the temperature of the expanded beads. The expansion process is achieved by injecting steam into the chamber where the granules are placed. The steam expands the granules and causes them to increase in volume. As the granules expand, they become less dense and lighter in weight.
The temperature of the expanded beads is controlled by regulating the amount of steam that is injected into the chamber. If too much steam is injected, the beads will be overheated and will have a lower density. If not enough steam is injected, the beads will not be fully expanded and will be very dense.
The continuous pre-expander is the latest innovation in PET bottle manufacturing technology. The biggest advantage of the continuous pre-expander is its ability to operate at high speeds, which results in a shorter overall production time. Additionally, the continuous pre-expander uses less energy than traditional batch expanders, and it produces a more consistent product.
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Port: Hangzhou, China
Production capacity: 20 sets / month
Payment method: Letter of credit, telegraphic transfer
Model:Automation
Computerized: Computerized
Certification: CE, ISO9001:2008
Condition: New
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Description
■ It has first and second expansion.
■ The pre-expander machine has screw conveyor and automatic weighing system;
■ It is controlled by PLC system and it has touch screen which can realize a full automatic cycle operation of material feeding, steam feeding, temperature controlling, foaming and discharging.
■ The foaming process in the machine is realized in a fully closed stainless steel barrel under constant pressure with high thermal efficiency, economized steam, shortened curing process and high foaming magnification.EPS pre-expander with second expansion
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What is continuous pre-expander
Pre-expanders are used to increase the PET bottle blowing capacity. A pre-expander is a machine that takes granulated PET and expands it into larger pellets. These larger pellets are then sent to the bottle blowing machine where they are used to create bottles of various sizes and shapes.
The continuous pre-expander is a newer type of pre-expander that offers a number of advantages over the batch pre-expander. The biggest advantage is that it can expand PET at a much faster rate, making it ideal for high volume applications. In addition, the continuous pre-expander is much more energy efficient than the batch pre-expander, making it a more sustainable option.
Continuous pre-expander is a machine that is used in the plastics industry for the production of expanded polystyrene (EPS). The machine constantly supplies EPS beads to a pre-expander chamber, where they are heated and expand to form a foam. The foam is then cooled and formed into shapes.
Pre-expanders are used in a variety of applications, including packaging, insulation, and construction. EPS is a versatile material that has many benefits, including being lightweight, strong, and weather-resistant.
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The main role of continuous pre-expander
The main role of continuous pre-expander in the EPS production line is to expand the beads and make them into larger pellets with a lower density. The pre-expander is also responsible for dehydrating the beads to a certain extent, which is necessary for the next step in the production process.
The pre-expander works by heating the beads and then injecting them with steam. The steam causes the beads to expand and become larger pellets. The amount of expansion is controlled by the amount of steam that is injected into the system.
The main role of continuous pre-expander in the EPS production line is to expand the beads and make sure they are of uniform size before they are sent to the EPS block molding machine. This is done by injecting steam into the beads, which causes them to expand and become larger in size. The expanded beads are then cooled down and dried before being sent to the next stage in the production process.
The main role of continuous pre-expander in the EPS production line is to expand the beads and make sure they are of uniform size and density. The pre-expander is a very important machine in the whole EPS production line. It not only affects the quality of the final product, but also has a great influence on the energy consumption of the whole line.
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Advantages and Features of continuous pre-expander
Pre-expanders are used in the production of polystyrene foam products. A pre-expander is a machine in which raw beads of polystyrene are expanded into larger beads. The expanded beads are then used in the production of foamed products such as packaging, insulation, and toys.
Continuous pre-expanders offer many advantages over batch pre-expanders. They are faster, more efficient, and provide better product quality. In addition, continuous pre-expanders can be used with a wider range of raw materials, including recycled polystyrene.
Some of the features of continuous pre-expanders machine include:
-Faster expansion times
-Improved product quality
-Greater efficiency
-Wider range of raw materials
How to maintain a continuous pre-expander
It is very important to maintain a continuous pre-expander operation in order to achieve the highest possible product quality. If the pre-expander is operated discontinuously, the product quality will suffer. The following are some tips on how to maintain a continuous pre-expander operation:
1) Make sure that the pre-expander is properly maintained and serviced on a regular basis.
2) Make sure that the pre-expander is operated at the correct temperature and pressure.
3) Make sure that the pre-expander is fed with the correct amount of material.
4) Make sure that the material is properly mixed before it is fed into the pre-expander.
5) Make sure that the pre-expander operates continuously without any interruptions.
Common problems and solutions of continuous pre-expander
Polyurethane manufacturers have long been struggling with the issue of how to keep their pre-expanders operating continuously and efficiently. The main problem lies in the fact that the process of pre-expanding polyurethane foam is an exothermic reaction, meaning that it generates heat as it proceeds. This heat must be carefully monitored and controlled, or else the foam will become too hot and begin to degrade. The other problem is that the foam must be allowed to cool down fully between batches, or else it will not expand properly.
There are a few different solutions to these problems. One is to use a cooling tunnel, which helps to regulate the temperature of the foam as it expands. Another solution is to use a batch cooler, which allows manufacturers to cool down the foam between batches without having to shut down the entire system. Lastly, some manufacturers have begun using continuous pre-expanders, which do not require any downtime between batches and can operate continuously.
1. Common problems and solutions of continuous pre-expander:
- The pre-expander is not working properly
Solution: Check if the power supply is turned on and whether the machine is properly grounded. Check if there is something blocking the inlet or outlet of the machine. Check if the oil level in the tank is too low.
- The pre-expander is not expanding properly
Solution: Check if the material to be expanded is of good quality and has a moisture content within the specified range. Check if the expansion temperature and pressure are within the specified range. Check if there is something blocking the inlet or outlet of the machine.
