JPH0626868B2 - Single-sided corrugated board manufacturing equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a single-sided cardboard manufacturing apparatus for manufacturing single-sided corrugated board.

2. Description of the Related Art In a single-sided cardboard manufacturing apparatus, a gluing roll of a gluing device is brought into contact with the top of a corrugated paperboard formed by an upper roll and a lower roll to apply a glue solution. In this case, various configurations are provided in order to prevent the corrugated paperboard from floating from the lower roll.

That is, for example, the structure found in Japanese Utility Model Publication No. 55-118720 is provided. In this conventional structure, on the upper roll (upper roll), a temporary gluing device for the main roll is provided on the side that is the inner surface of the core material with respect to the main roll (lower roll), while eliminating the need for fingers.
Prevents the core material from rising from the main roll.

Problems to be Solved by the Invention According to the above-described conventional configuration, when performing temporary gluing on the inner surface of the smooth core material by the temporary gluing device, when the amount of the glue is small or the temporary gluing cannot be performed, there is a problem. Due to various problems such as the inability to achieve the intended purpose, the provisional gluing device is required to have high accuracy and cannot be easily adjusted.

An object of the present invention is to provide a single-sided corrugated board manufacturing apparatus capable of preventing the corrugated paperboard from rising while having a simple structure and adjustment.

Means for Solving the Problems The single-faced corrugated board manufacturing apparatus of the present invention to achieve the above object has an upper roll and a lower roll that mesh with each other,
In a single-sided corrugated board manufacturing apparatus in which a press roll is arranged facing the lower roll, facing the lower roll, heat-denatured adhesive powder particles that are softened by initial heating and hardened by overheating are placed between the teeth of the lower roll. An adhesive powder and granular material supply device for supplying the adhesive powder and a gluing device for applying a sizing solution to the top of the corrugated paperboard are provided.

Action According to the above-described configuration of the present invention, the core raw paper supplied by the upper roll can be formed into a corrugated paperboard by the meshing of the upper roll and the lower roll. Then, the formed corrugated paperboard moves with the lower roll, and then the sizing liquid is applied to the top of the corrugated paper by a gluing device, and then the liner paper supplied through the press roll is applied to the top of the corrugated paperboard to make Can be manufactured.

At that time, the adhesive powder particles supplied between the teeth of the lower roll are
By heating from the lower roll side, it softens and the adhesive force increases,
This allows the corrugated paperboard to move to the gluing device while maintaining the step shape without lifting. Then, the adhesive powder particles are hardened by overheating, whereby they are separated from the lower roll and integrated with the corrugated paperboard.

Embodiment One embodiment of the present invention will be described below with reference to the drawings.

1 is an upper roll, 2 is a lower roll, and the core raw paper 3 is formed into a corrugated paperboard 3A by both rolls 1 and 2. Below the lower roll 2, a press roll 5 for supplying the liner paper 4 to the step top 3a of the corrugated paperboard 3A is arranged.

An adhesive powder / grain supply device 7 for supplying the adhesive powder / grain 6 is provided between the teeth of the lower roll 2 immediately above the lower roll 2, that is, just before meshing with the upper roll 1. Here, as the adhesive powder particles 6, for example, a powdered paste or the like that is thermally denatured and softened by initial heating and hardened by overheating is used. The adhesive powder supply device 7 is composed of a hopper 8 and a shout 9.

A gluing device 12 for applying the gluing liquid 11 to the step top 3a of the corrugated paperboard 3A is provided so as to face the portion where the corrugated paperboard 3A moves outside the lower roll 2. The gluing device 12 includes a glue reservoir pad 13 for holding the glue solution 11, a gluing roll 14, a gluing roll 15, and the like. A vacuum device 17 is provided opposite to the gluing device 12 so as to face the lower roll 2 and remove dust from between the teeth.

Next, the operation of the above embodiment will be described.

The single-sided corrugated board manufacturing apparatus is operated in a state in which the gluing device 12 is arranged so that the gluing roll 14 contacts the corrugated paperboard 3A at the top 3a. Then, the core raw paper 3 supplied by the upper roll 1 is formed into a corrugated paperboard 3A by the meshing of the upper roll 1 and the lower roll 2.

At this time, the adhesive powder particles 6 taken out from the hopper 8 are supplied between the teeth of the lower roll 2 via the shout 9 (second
Figure).

Then, the corrugated paperboard 3A reaches the sizing device 12, and the sizing liquid 11 is applied to the corrugated top 3a via the sizing roll 14 (FIG. 3). Then, the liner paper 4 is supplied via the press roll 5 or the like so as to come into contact with the step top 3a, whereby the single-sided corrugated board 16 can be manufactured (FIG. 4).

As described above, when the corrugated paperboard 3A is formed by the rolls 1 and 2, the adhesive powder particles 6 located between the teeth of the lower roll 2 and located in the valleys are softened by the heating from the lower roll 2. As a result, the adhesive force increases, whereby the corrugated paperboard 3A becomes attached to the tooth surface of the lower roll 2 (FIG. 3), and moves to the gluing device 12 while maintaining the step shape without floating. The adhesive powder 6 is gradually hardened by overheating, whereby it is easily peeled off from the lower roll 2 and integrated with the crests of the corrugated paperboard 3A (FIG. 4).

It should be noted that dust such as glue powder remains between the teeth of the lower roll 2 when the adhesive powder 6 is cured and peeled off, but this can be removed by suction by the vacuum device 17.

EFFECTS OF THE INVENTION According to the present invention having the above configuration, the core raw paper that has been supplied by the upper roll is formed into a corrugated paperboard by meshing of the upper roll and the lower roll in which the adhesive powder particles are supplied between the teeth. By doing so, the back side of the corrugated paperboard can be attached to the tooth surface of the lower roll via the adhesive powder particles, so the corrugated paperboard can move without floating, and the paste liquid is accurately applied by the gluing device. be able to.

At that time, the adhesive powder particles supplied between the teeth of the lower roll are
By heating from the lower roll side, it softens and the adhesive force increases,
This allows the corrugated paperboard to be moved to the gluing device while maintaining the shape of the corrugated sheet without floating from the lower roll. Then, the adhesive powder particles are hardened by overheating, thereby peeling from the lower roll and being integrated with the corrugated paperboard to increase the strength of the single-sided corrugated board.

As described above, according to the present invention, the adhesive powder particles are supplied between the teeth of the lower roll, the structure not requiring so much accuracy, and the structure that is easy to adjust, but the floating of the corrugated paperboard is always reliably prevented. can do.

[Brief description of drawings]

The drawings show one embodiment of the present invention, in which FIG. 1 is a side view and FIG.
FIG. 3 and FIG. 3 are side views of the main part, and FIG. 4 is an enlarged view of a single-sided corrugated board. 1 ... upper roll, 2 ... lower roll, 3 ... core raw paper, 3A ... corrugated paperboard, 3a ... corrugated top, 5 ... press roll, 6 ... adhesive powder granules, 7 ... adhesive powder Granule feeder, 1
1 ... glue liquid, 12 ... glue device, 14 ... glue roll, 16 ... single-sided corrugated board, 17 ... vacuum device.

Claims (1)

[Claims] 1. A single-faced corrugated board manufacturing apparatus having an upper roll and a lower roll meshing with each other, and a press roll disposed opposite to the lower roll, facing the lower roll and being softened by initial heating. It is characterized in that it is provided with an adhesive powder granule supply device for supplying heat-denatured adhesive powder granules that harden due to overheating between the teeth of the lower roll, and a gluing device for applying a paste liquid to the corrugated paperboard corrugated paper. Single-sided corrugated board manufacturing equipment.