JPS59227441A - Single facer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION A conventional general single facer is shown in a side cross section in FIG. 1 and in a front view in FIG. 2. In the figure, 1 is an upper roll, 2 is a lower roll, 3 is a pressure JJ roll, 4 is a glue roll, 5 is a dokuroll, 6 is a glue container, 7 is glue, and 8
8a is a core assembly, 9 is a liner, ]0 is a single-sided corrugated paperboard, and 11 and 12 are bearings, respectively.

Here, to explain the manufacturing process of the single-sided corrugated paperboard 10 using the conventional single facer, the core assembly 8 is supplied to one example of an upper roll, is bitten by the mesh a1 of the upper roll 1 and the lower roll 2, and is waved. The core set 8a is formed into a shape.

Next, the core set 8a is transferred as the lower roll 2 rotates, and the glue 7 in the glue container 6 is scooped up by the glue roller 4 and the glue film is adjusted by the doku crawler 5, and then transferred to the glue roll. 4 is glued to the top of the step of the core assembly 8a. On the other hand, the liner 9 supplied to the pressure roll 3 side and the glued core assembly 8a are adhered to each other at the pressing portions of the lower roll 2 and the pressure roll 3 to form a single-sided corrugated paperboard 1o.

In the conventional single facer, the upper roll 1 is generally connected to the lower roll 2, and the pressure roll 3 is connected to the lower roll 2.
each with a linear pressure of approximately 20 to 60 kg r/cn+. The former is a pressing force for step-forming the core assembly 8, and the latter is a pressing force for applying adhesive force between the stepped core 8a and the liner 9.

On the other hand, since the lower roll 2 and the upper roll 1 are machined with tooth-shaped ridges on the outer surface of the roll, and the pressure roll 3 has a smooth surface, the lower roll 2
The structure is such that the steps strike the surface of the pressure roll 3 at high cycles through the core 8a and the liner 9.

In the above structure, the upper roll 1, the lower roll 2, and the pressure roll 3 are mainly operated by forced displacement between the lower roll 2 and the pressure roll 3 (
The main components are activated by excitation based on the displacement of the pressure roll 3 in the pressing direction (when the pressure roll 3 is pressurized by one step of the lower roll 2 and when it is pressurized by two steps). It vibrates at the number of teeth cycle NZ of the lower roll 2 (number of rotations NIIZ of the lower roll 2 x number of teeth Z).

At this time, when the tooth number cycle NZ matches the natural frequency of the roll system, a resonance state occurs, especially when the three rolls 1.2.3
vibrates violently. At the time of such resonance, the lower roll 2 and the pressure roll 3 collide violently, and a large collision load is applied to the core sheet 8a and the liner 9 sandwiched between them, causing the sheet to break or depending on the phase of the vibration, the core sheet 8a may be damaged. In some cases, a phenomenon occurs in which the liner 9 is not bonded. Also, the collision of the rolls generates a lot of noise.

As described above, the conventional single facer has drawbacks such as sheet breakage due to roll vibration, poor bonding, and large noise.

The present invention was proposed in order to eliminate the above-mentioned conventional drawbacks, and aims to provide a single facer IM that reduces vibration and noise of the device.

That is, the present invention provides a single facer equipped with a pressure roll that continuously forms a single-sided corrugated board sheet by laminating a liner into a step-formed fine liner. By supporting the outer cylinder in the parts that are not involved in bonding,
It is an object of the present invention to provide a single facer which provides a pressure roll with a buffering capacity and reduces the vibration area as a shell of the pressure roll to suppress noise.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 shows a side cross section of a pressure roll showing an embodiment of the present invention, and FIG. 4 shows a front view including a partial cross section.

In the figure, the outer cylinder 13 is the part that is pressurized with the lower roll 2 (
A bearing 16 at the shaft end on the inner m14 fixed to the frame 18 except for a circumference of 2 cm to V2) of the circumference of the outer cylinder 13, a sliding bearing between the outer cylinder 13 and the inner cylinder 14, a static pressure bearing, A gear 1 supported by a rolling bearing or the like 19 and attached to the shaft end
Rotated by 5.

In addition, steam enters the inner tube 14, and heat is transferred to the outer tube 13 by the heat medium 20 sealed between the outer tube 13 and the inner tube 14. (It is a setting)
.

Next, to explain the effect, by creating a double structure, it is possible to make the outer cylinder 13 thin and thick (about 5 to 20 mm thick) (the bending rigidity is borne by the inner cylinder 14), and the lower roll 2 and pressure The excitation force based on the forced displacement between the rolls 3a is buffered, and the force acting on the sheet between the lower roll 2 and the pressure roll 3a is reduced. Furthermore, by supporting the inner cylinder 14 except for the pressurized portion, the shell vibration area of the outer cylinder 13 is reduced.

Since the present invention is constructed as described above, sheet breakage can be avoided by making the wall thinner, and noise can be reduced by reducing the shell vibration area. It is also believed that poor bonding can be avoided by increasing the bending rigidity of the inner cylinder.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a conventional single facer, FIG. 2 is a partially sectional front view of the same, and FIG. FIG. 4 is a partially sectional front view of the same. Explanation of the main parts of the figure 2 - Lower roll 13 - Outer cylinder 14 - Inner cylinder

Claims (1)

[Claims] In a single facer equipped with a pressure roll that laminates a liner to a stepped core assembly and rapidly forms a single-sided corrugated sheet, the pressure roll is rotated by a thin outer cylinder, and an inner cylinder that does not rotate. A single facer characterized in that the inner cylinder supports an outer cylinder in a portion not involved in bonding.