Pulp Molding Production Process

Papermaking has become a world-wide industrial industry. Various paper and paper products have penetrated into all aspects of people’s lives, and pulp molded products have also developed in this environment. Some developed countries have more than 80 years of history in the pulp molding industry. At present, the pulp molding industry in France, the United States, Japan, Canada, Iceland, the United Kingdom, Denmark, Singapore, the Netherlands and other countries have already reached a considerable scale. In the United States, paper for pulp molded products is basically waste paper, which is about 450,000 tons per year. Since 1994, it has grown at a rate of 40% per year, and in 2000 it has grown to 810,000 tons. Since 1989, there are about 600 factories in the United States that produce pulp, paper and cardboard and related products. Among them, 200 are basically using waste paper as raw materials, and another 300 are using waste paper in the production process. The huge demand for pulp molded packaging has made it the third largest consumer of recycled paper.

Pulp molding development characteristics

1. A wide range of applications. Such as the automotive industry, electronic products, hardware appliances, consumer goods, medical appliances, household goods, office products, etc., pulp molded products have even been applied to sales packaging.
2. Use computer-aided design methods. The model of the pulp molded product is designed by using three-dimensional computer software, such as pro/Engineer, Solid-works, etc. According to the data file of the design model, the rapid prototyping machine can directly manufacture the molding die and the prototype of the product. It is also possible to transfer the data file into the manufacturing software Master cam and perform the tool processing directly in the CNC machining center. This technology is currently only available to individual companies in China.
3. Product design is standardized and modular. In the production of pulp molded articles, mold costs are one of the important costs. Foreign manufacturers pay attention to the wide application and versatility in the design and application of pulp molded products. For example, general-purpose braided linings, corner guards, partitions, etc., because of the large production volume, high mold utilization rate, simple design, and the mold amortization cost will be greatly reduced.
4. The production equipment is advanced and the process is reasonable. Compared with China, it is characterized by pressure drying technology, direct hot pressing, no need of oven, and greatly reduced energy consumption. The degree of machine automation is very high, almost completely automated, saving energy and labor.