Pulp molding, as an environmentally friendly, degradable and renewable packaging material, has many applications in real life. With the advent of the era of intelligent automation, more and more brands and manufacturers choose to transform intelligent manufacturing. Next, look at the automation equipment that has been implemented in foreign countries 10 years ago.
Pulp molded products usually used waste paper as a basic material in the early days, and used special equipment and molds to perform three-dimensional modeling through a unique process to produce packaging products and objects of various shapes. Today, let the editor of China Paper Net introduce to you the production process of pulp molded products:
1. Pulping-pulping-pulping
Using reeds, straw husks, sugarcane, wheat straw, bamboo, wood, and recycled paper as raw materials, after crushing, grinding and other processes, they become fibers suspended in water. According to the characteristics of the final product, the fiber length and concentration of the original pulp can be controlled during the pulping process. Add functional additives (brighteners, waterproofing agents, etc.) and dyes, and perform a series of auxiliary operations to form pulp that meets the production needs.
Equipment: pulper, slurry tank, slurry tank, etc.
2. Molding process
The molding process of pulp molded products is mainly through a series of methods such as vacuum molding and grouting molding, so that the raw pulp fibers are formed into the shape designed by the mold. Among them, vacuum molding is the most commonly used and the most effective one.
Equipment: Forming machine
3. Drying process
The drying process mainly uses fuel, oil, gas, electricity or steam, heat transfer oil or other media as a heat source, heating air, drying the molded pulp molded products in the hot air, and extracting evaporated water from the products through a fan. Accelerate the drying effect.
Equipment: Dryer
4. Shaping and trimming process
After the pulp product is shaped and dried, it is basically shaped, and then heated with an electric heating plate or other heat medium (such as heat transfer oil) to make the pulp product mold have a higher temperature (150-250°C), and then use air pressure or hydraulic pressure The paper support product is pressed under high temperature and high pressure to make the product appearance neat and beautiful, achieve better toughness, and make it have better shockproof performance.
Equipment: shaping and trimming machine
5. Packing
Finally, the products produced through a series of processes will be inspected, packaged and stored. According to the characteristics of different products, manual packaging or automatic packaging machines can be used for counting and packaging.
