JPS5871149A - 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 The present invention relates to a sinkle facer for the purpose of controlling pressurizing force.

The sinkle facer is one unit of a corrugator, which is a line for manufacturing corrugated poles, and is equipment for manufacturing single-sided corrugated board. In addition, single facers generally have a pair of corrugating rolls and a pressure roll installed opposite to one of them as the main components, and the flat core base paper is caught in the meshing part between the upper and lower corrugating rolls that mesh with each other. The material is formed into a corrugated sheet, and then glued to the top of the corrugation, and then pressed onto a flat liner separately supplied to the pressure roll at the engagement portion of the lower roll and pressure roll, and the two are glued together. Form a single-sided cardboard.

Therefore, between the upper roll and the lower roll, a pressure of 30 to 8'
/cm linear pressure and glob pressure), and in order to apply the pressure necessary for bonding the core and liner between the lower roll and the pressure roll, the linear pressure and glob pressure of 20 to 60 to 9/CTn are usually applied. )
The power is the best. As a pressurizing method, a method is adopted in which the lower roll is set to medium heat and the upper roll is pressed against the lower roll using a pressure device, and the pressure roll is similarly pressed against the lower roll using the pressure device.

In addition, the quality, type, and width of sheets (core and liner) produced by single facers vary widely, and since there is an appropriate nip pressure when forming or laminating corrugated sheets, various sheets The pressing force must be adjusted accordingly.

In conventional single facers, in many cases, such adjustment of the pressing force is left to the operator's experience and intuition, and is not automated.

In addition, the pressurizing force must be adjusted in response to order changes and operating speeds, which can occur hundreds of times a day, which not only makes the work of the operator more demanding, but also requires less skill. This is essential work. Furthermore, if the operation is inappropriate,
For example, if the pressing force is set too high, the sheet will break, and if the pressing force is too small, the corrugated plasticity of the core will be insufficient, and poor bonding will occur when the core and liner are bonded together, resulting in paper loss. There was a drawback that this occurred.

Setting the pressing force of a sinkle facer usually relies on manual labor and is not automated. An object of the present invention is to provide a single facer that can automatically adjust pressure in order to save labor.In the single facer consisting of an upper roll, a lower roll, and a pressure roll, A pressurizing device capable of applying a pressure of J111 to each of the rolls toward the lower roll, a paper width detector for detecting the paper width of the core and liner supplied to the upper roll and the pressure roll section, and a paper width detector. It is an object of the present invention to provide a single facer comprising a control device that adjusts the amount of pressurization of the pressurization device according to a signal.

The force exerted on both the core and liner sheets during pressing is determined by the pressing force and vibration of the rolls.

The present invention is characterized by detecting the paper width and automatically adjusting the appropriate nip pressure to be applied to the paper at a constant level when the paper width changes.Also, since the nip pressure changes due to roll vibration, The feature is that the nip pressure applied to the paper is automatically adjusted to an appropriate and constant level.

Therefore, according to the present invention, the pressing force is controlled so that the nip pressure is always appropriate and constant even if the width of the sheet changes and the magnitude of vibration changes due to the operating speed. In addition, an operator is not required to set the pressure, and homogeneous 81 corrugated cardboard sheets can be produced with an appropriate pressure, and paper waste due to paper breakage, poor lamination, etc. can be prevented.

Embodiments of the present invention will be described below with reference to the drawings. The drawings show a block diagram representing a single facer roll pressure control method showing an embodiment of the present invention.

In the figure, (1) is an upper roll, (2) is a lower roll that meshes with the upper roll (1), and (3) is a lower roll (2).
), the pressure roll (4) is disposed opposite to the upper roll (
A pressure cylinder (5) is used to press the pressure roll (3) onto the lower roll (2).
This is a pressurizing cylinder to press against.

(6α) (6b) (6C) are upper rolls (1) respectively
, lower roll (2), pressure roll (3) shaft (7α)
(7b) Detectors for detecting the vibrations of (7C), (8→(8b) are the core (9) and liner (10) respectively.
Detectors for detecting both ends of the paper, 0]) is the manufactured single-sided corrugated paperboard, 0 is the lever for pressurizing the upper roll (1) to the lower roll (2), and (13) is the pressure roll. (3) is a lever for pressurizing the lower roll (2).

(14α) is the movement of the side edge of the center core (9) in the paper width direction;
4-1 In other words, the tracking mechanism (14h) is for always installing the detector (8a) at the side edge as the paper width changes;
8α) is a paper width calculator for calculating the paper width according to the paper width direction movement amount, (1, 4, 4 is a nip pressure between upper roll (1) and lower roll (2) for setting a desired nip pressure) It is a setting device.

(■4f') is a computing unit (14IC) that calculates the relative amount of vibration based on the amount of vibration of the upper roll (1) and old lower roll (2) detected by the detectors (6α) and (6h). (1Φe) is a control device that generates a control signal based on the signal of the paper width calculator (14b), vibration amount calculator (14, f), and nip pressure setting device (1Φ0), and (1Φe) is a pressurizing cylinder that receives the control signal. (4) This is a pressure adjustment device that adjusts the pressure.

In addition, (15→ is a tracking mechanism for always installing the detector (8h) at the same side edge as the side edge of the liner (10) moves, that is, the paper width changes, (15h) is the detector (8h) ), a paper width calculator for calculating the paper width according to the amount of movement of (1
54 is a pressure roll (3
) - lower roll (2) nip pressure setting device, (15f) is the lower roll (2) nip pressure setting device detected by the detectors (6b) and (6C).
) and the pressure roll (3), and (15C) is a paper width calculator (15b), a vibration amount calculator (15f), and a nip pressure setting device. (15) is a control device that generates a control signal based on the signal; (15e) is a pressure adjustment device that adjusts the pressure of the pressurizing cylinder (5) based on the control signal.

Note that the liner (10) and the core (9) usually have the same paper width, and it is also possible to use only one of the paper width detectors (8a) (8h). Therefore, at this time, it is connected to the control device (1,4C) (15C)11. (8α)
)-(14α)-(14,6) or (8b)-(
15a)-(], 5h). Furthermore, if the vibration of the device is small and the fluctuation of the nip pressure due to vibration is small, detection and control of the vibration may be omitted.

Next, to explain the effect, the nip pressure applied to the paper between the rolls is basically determined by the following equation.

Hey, Tateji! TSヱ°η・・・・・・・・・・・・(1)
Here, Ac: Cross-sectional area of the pressurizing cylinder Pc: Pressure of the pressurizing cylinder n: Number of pressurizing cylinders R Nilever ratio l: Paper width control devices (14C) and (15C) calculate PN based on equation (1). Just adjust your PC to keep it constant.

Therefore, pressure is applied by the pressure cylinder (4) of the upper roll (1) (the suffix 1 indicates that it is of the upper roll (1) system), and by the pressure cylinder (5) of the pressure roll (3) (the suffix 1 indicates that it is the upper roll (1) system). 2 indicates the pressure roll (3) system). Further, the relationship between the load increment W due to the vibration 7- can be determined in advance through a test.

Therefore, according to the present invention, it is possible to automatically adjust the pressurizing force of the pressurizing device for the upper roll and the pressure roll in order to always maintain the desired nip pressure in response to changes in vibration caused by changes in sheet width and operating speed. .

BRIEF DESCRIPTION OF THE DRAWINGS The drawing is a block diagram for explaining a single facer control method showing an embodiment of the present invention. Explanation of main parts of the diagram■...Upper roll 2...Lower roll 3...
Pressure roll 4.5...pressure cylinder (pressure device) 8α. 8b...
・Paper width detector 9... Core 10... Liner
11...Single-sided corrugated paper 1.411.15g...Pressure adjustment device patent Applicant: Mitsubishi Heavy Industries, Ltd. 8-

Claims (1)

[Claims] In a sinkle facer consisting of an upper roll, a lower roll, and a pressure roll, a pressure device that presses the upper roll and the pressure roll toward the lower roll, each having an adjustable amount of pressure; 9. A single sheet comprising: a paper width detector that detects the paper width of the core and liner; and a control device that adjusts the amount of pressure applied by the pressure device in accordance with a signal from the paper width detector. Facer.