Dec 19,2023

A few concerns and considerations for start-up pulp molding companies

  As a result of the newly created pulp molding production enterprises of pulp molding equipment and pulp molding products and processes are not familiar with, it is easy to produce some illusions into some of the misconceptions. Now summarized as follows, for the reference of new entrants.

  一、 Evaluation of equipment capacity: Misconceptions about the output of equipment

  1, how to measure the capacity of pulp molding equipment

  The production of different products, the output is different, in order to facilitate the comparison of the capacity of the equipment, the national industry standard unified provisions of the daily output standard 10-inch disk (21 grams) as the standard to calculate the capacity of the equipment, but in the actual production of 10-inch disk weight is basically 20 grams, so generally 20 grams of the standard 10-inch disk as a measurement standard.


  2, new customers in the measurement of equipment capacity, there are usually the following misunderstandings, easy to produce capacity illusion:

  Misunderstanding ①, to grams of higher weight square box products to measure the capacity of the equipment, the same machine, you can produce 1 out of 9 20 grams of 10-inch discs 600 kilograms per day, but also 1 out of 10 40 grams of square box products 1-1.2 tons per day. It is easy to create an illusion of capacity until there is a differentiation between the metrics. A daily output of 600 kg will be mistaken for a 1-ton machine.

  Misconception ②, 9-inch disk as a measurement standard, because 9-inch disk is slightly smaller than 10-inch disk, many pulp molding equipment can be lined up 9-inch disk is more economical, but the number of 10-inch disk to do a sharp decrease in the number.

  Misunderstanding ③, production plus or minus 10% trap, the industry said that the equipment capacity refers to the minimum production, usually not less than 10%, when talking about production, production is not allowed to negative 10%, but many users generally do not take it seriously.

  3, how to avoid the illusion of capacity

  The industry's equipment capacity refers to the minimum daily output is not prepared to the standard 10-inch disk (20 grams) as the acceptance criteria. Any heavier square box products, 10-inch disk 22 grams, or 17 grams of 9-inch disk as the standard of measurement as well as production allowed plus or minus 10%, will produce capacity illusion.

  二、Myths about No-Cut Energy Savings and Low Costs

  Pulp (plant fiber) molded disposable food and beverage production line industry standards issued by the Ministry of Industry and Information Technology of the People's Republic of China on the definition of no-cutting edge: "the use of special technology, without the use of blades or punching and cutting process to achieve the same effect with the cutting edge of the technology." The performance requirements of no-cutting edge: "no-cutting edge products should have no cracks, no missing edges, no breakage; and when 100 products are stacked together, there is no obvious whitening area and obvious burrs around the periphery, and the edge deviation of the products should be no more than ±0.5mm".

  The problem of free cutting edge has been explored for more than 20 years, in 1998, applied for a patent on free cutting edge. From the theoretical projection and practical summary, free cutting edge is more energy-consuming than cutting edge process.

  1, according to the process of no-cutting edge, if the pulp concentration is higher, the effect of no-cutting edge is very poor, and the burrs are serious. So when producing no-cut products, the pulp concentration is much lower than that of cut edge. Generally speaking, the concentration of pulp for edge-cutting products is 4-5%; 2-3% for edge-cutting-free products. The same production of 1 ton of products, vacuum filtration molding to increase the amount of drainage, almost 2 times or more. That is to say, the production of free cutting edge products to consume the amount of vacuum is much larger than the cutting edge products. Vacuum and heating is the main energy-consuming part of the pulp molding production process.

  2, no cut edge process in order to achieve the effect of reducing burrs, in the hot press molding, after a long time of false pressure process, otherwise there will be "blowing edge" phenomenon or more burrs. The so-called "false pressure" is the hot press mold, the upper and lower hot press molds in the close together first do not press, the mold "wet blank" for a certain period of time baking, such as "wet blank" is baked to a certain dryness, and then apply the closed mold. After a certain degree of dryness, and then apply the mold force for hot pressing.

  This false pressure baking process wastes a lot of heat, another adverse effect is the product of low density. For example, the same 300 10-inch disk products stacked together, free cutting edge products than normal products to be 30-50CM higher, greatly increasing the packaging, transportation costs.

  3, free cutting edge products of raw materials, according to a number of manufacturers who have used the production of free cutting edge feedback, the use of bagasse pulp, wheat grass pulp and other 100% grass pulp can not be achieved, such as the effect of free cutting edge, to add a certain amount of wood pulp pulp pulp adjustment, in order to achieve certain results.