Steps of paper production from wood
To produce paper, wood from trees such as pine and fir, which have soft and long fibers, is used. Despite their elastic properties, these woods are very strong and after preparation create a smooth and smooth finish for the paper. Wood producers working with carton companies are selected from sustainably managed forests; Because in this case, every tree that is cut is replaced with a new one, to help preserve the forest ecosystem. During the papermaking process, wood chips are made after the trees are cut down. The wood chips are then turned into pulp. This can be done by grinding the wood or chemically cooking the wood chips. The obtained paper will have a different color according to the type of tree used. Generally these papers are available in silver color or light brown color. In general, for most papers, the pulp remains the original color, but for cardboard it can be bleached through a special process.
Carton making steps at the carton production factory
Carton production stages in different carton companies are very similar. Of course, according to the rules and regulations and equipment that each company has, there will be a possibility of changing some steps and reducing or increasing the number of carton production steps. The carton production line is used to produce the sheets required for the production of cartons. In the carton production line, in general, two chambers for the production of corrugated sheets are installed along the line, one of which is for sheets with B or E grooves and the other for C grooved sheets. produces Therefore, this production line can produce three-layer or 5-layer plates with C, B, E and BC, CE flutes. The production process of corrugated sheets begins with large rollers of flat and intermediate sheets. The corrugated middle plate is glued to the inner and outer flat plates with the help of natural starch glue, and then the starch is heated in a hot box using moist air to stabilize the connection between the corrugated plates and the flat middle and outer plates. Next, the sheets are cut along the desired length and then cut in width with a concentric knife and stored in a stack.
Cartoon process mechanisms and equipment
Equipments and mechanisms that together complete the sheeting process of different cartons such as 5-layer cartons.
1) Use the Easy Open
This machine is installed on the sheet-making line to create Easy open strips on the carton and performs the desired operation during sheet-making.
2) Glue Kitchen glue kitchen
Glue kitchen is a system in which the starch-based glue required for the sheet-making process is prepared and mechanically transferred to the sheet-making line. The raw materials for making glue liquid are corn starch powder, caustic soda, brax and water. After heating, these items will become the desired glue for the production of packaging cartons and sheets.
3) Shredder crusher or shredder
The shredder is a device by which a part of waste or waste paper and cardboard that cannot be transported by the transmission network is crushed and then transferred to the polythene through the transmission ducts.
4) The Press Press device
This machine collects the wastes and scraps obtained during the cartoning process through the channeling network in the factory and they are made into pressed cubes called bales. Bales produced by paper mills are recyclable and can be used again.
5) The dust device
The dust collector device collects dust particles in the air of the factory and It compresses small cylindrical pieces. These parts can be recycled by paper factories.
6) Temporary warehouse sheet storage
Temporary sheet storage warehouse is an area consisting of 25 rows of metal rollers with different widths corresponding to the width of the sheets that can be produced, which is used as a temporary storage warehouse for production cardboard sheets. After the specified period of time has passed and the sheets are ready, they will be used to produce cartons with different structures.
Category Cartoon Category Manufactured in Cartoon Making
Cartons produced in carton factories are divided into two general categories: normal (American) cartons and diecut cartons.
Ordinary cartons
The production of normal cartons is done without the need to make a mold. To produce normal cartons, the sheet is entered into the relevant machine and the defined folding line is applied on the sheet. Then, if printing is needed, the design defined on the stereotype will be printed on the carton at the same time and the cartoning process will be completed.
Dykatti cartons
Diecut cartons according to the plan of the flat or It is done circularly. In making diecut cartons, after the sheet enters the sheet machine, it is cut by a mold made based on the carton plan. Then, if you need to print on the machine, depending on the type of die-cut machine, the printing is done at the same time or the sheet is cut and closed for printing on another machine.
