The single facer machine is one of the important equipments of the corrugated box production line. It is a mechanical equipment for the production of corrugated core paper (a special name for corrugated paper in cardboard). In the corrugated packaging industry, it is known as the heart of the “corrugated cardboard production line”.

Main structure of single facer machine

The single facer machine consists of mill roll stand and a single-sided corrugated forming machine. The main components of the single facer are: base paper support, corrugating roller, pressure roller, preheating roller, gluing device, pneumatic device, paper guide and vacuum adsorption device, etc.

Classification of single facer machine:

According to different characteristics, single facer machines can be divided into the following types:
1) Cassette type negative pressure single facer machine: The negative pressure design is adopted, with low heat loss, so that the core paper can be evenly pressed and attached to the surface of the corrugating roll, and the roll can be changed quickly. Effective width: 1800-2200mm

2) Cassette type positive pressure single facer: Fast cassette-type corrugating roll replacement, order adjustment at any time, automatic speed regulation, and automatic data storage. Effective width: 1800-2800mm

3) Adsorption type single facer: effective width: 1400-2500mm

4) Double-corrugated single facer machine: one machine has two sets of corrugated rollers, one can be selected at will during work, and the other set is preheated and spared to replace the corrugated type. Small footprint (similar products need two single facer machines to achieve this function, which occupies a large area).

Working principle of single facer machine

The corrugated core paper is heated first, and then the corrugated roll is used to form the required corrugated shape. Then, glue (starch adhesive) is applied to the corrugated peak and combined with the liner. The face paper and the formed corrugated paper are pasted into a two-layer corrugated cardboard at the tangent line of the pressure roller and the lower corrugated roller, and then are combined with other single corrugated cardboard and face paper through the traction belt on the flyover to the double-sided machine.

The heating methods of core paper include steam heating, electric heating and oil heating. The machining flute type of corrugated single facer can be UV/A, E, C, B, EB or customized according to needs.

Why the corrugated cardboard single facer is so important?

The operating process of the single facer machine includes the following: creating conditions for unwinding and manipulating the face paper and core paper; pre-processing and preheating the core paper and the face paper; preparing for corrugating and bonding processes; forming a straight core paper Specific corrugation; applying adhesive to the newly formed corrugation tip; bonding core paper and facial paper together; transporting the single-faced paper web to the conveyer bridge. If the single-faced paper web delivered to other processes has quality problems, the other processes cannot be repaired or compensated at all. Therefore, the single face machine is very important for carton production.

The quality of the corrugated board produced by the single face corrugated machine directly affects the production cost of the carton. Base paper is the main material for the production of cartons. About 75% of the cost of carton production comes from raw materials. If the corrugated board produced by the single facer is unqualified or defective, it means the waste of raw paper and other materials, the increase of production costs, and the decrease of production profits.

Therefore, in the current low-profit market environment in the carton industry, the production technology of the corrugator single facer machine should be well controlled, and the performance and operation technology of the equipment should be controlled. It is self-evident to control the quality of raw materials, prevent the occurrence of quality problems, and increase the pass rate of semi-finished products of the single-facer.