The purpose of producing paper trays and egg trays is to protect the integrity of fragile items such as poultry eggs, electronic products, toys, flower pots, tea cups, etc. and to facilitate road transportation.
The added value of paper trays and egg trays is not high, so it is necessary to improve product quality and reduce production costs.
First, let’s look at the production steps of egg trays:
1. Use a special pulper to crush the recycled waste paper (cardboard boxes, books and newspapers, etc.) into pulp. When processing waste paper, it must be properly cleaned. Waste such as iron wire, hemp rope, soil, etc. cannot be processed together with waste paper and become pulp through a pulping machine.
2. The pulp concentration is adjusted to 0.5%-1% with water. In the process of egg tray pulping, if no additives or pulping are required, this step is very simple. If additives or pulping are required, this step is very important. Auxiliary agents make pulp egg trays have certain characteristics under certain conditions, such as moisture-proof and anti-corrosion, so auxiliary agents must be added according to the amount.
3. Transport the modulated pulp to the pulp molding machine, use vacuum suction to adsorb the pulp on the pulp molding mold, vacuum dehydrate and then dry or air dry.
In the egg tray molding process, the main thing is the adsorption of pulp. If the adsorption is not good (vacuum degree), the product quality will be greatly reduced (for example, the egg tray is bad, has no patience, and has no stiffness). Because the adsorption force comes from the suction of the vacuum pump, which is also the dehydration force, if it is too large, the mold will be easily damaged, and if it is too small, the quality will be too poor, so the control of suction in this process is particularly important. In addition, the egg tray mold is the key to the production of egg trays. The mold must be handled carefully. After a period of use, it must be cleaned with a cleaning machine to ensure that the mold surface is clean, so that the egg tray made is more standard. According to the characteristics of egg trays, the moisture content of egg trays is usually 150-180 grams. The air-energy heat pump egg tray dryer needs to dehumidify more than 60% during the process. Dehumidification and hot air circulation are very important. This can ensure that the instructions of the intelligent temperature and humidity control system are received in the closed drying room, and the egg trays are dried evenly and quickly. A batch can be dried in about 3 hours. We know that industrial paper trays, paper tubes, corrugated paper, etc., these materials generally need to be dried throughout the year, and the seasonality is not obvious. Therefore, the configuration of air-energy heat pump egg tray drying units must be able to meet the requirements of different situations throughout the year: Generally, the drying objects are relatively single and fixed, and the versatility of the drying objects is less considered. The operation automation is required to be high, and it is best to run fully automatically. The control points are medium and high temperature, fast, efficient, energy-saving, and all-weather. According to different paper trays and paper products, there are two types of side blowing or top blowing. Common drying modes include static, tunnel, belt, circulating wind mode advection, etc.
