JPS6295206A - Calender roller device - Google Patents

Abstract

PURPOSE:To permit constant control of the quality of a mating surface between an upper rubber sheet material and a lower rubber sheet material at all times by controlling a pushing force, detected upon bonding rubbers, within a preset range. CONSTITUTION:When a distance between the rollr shaft 3a of a roller 3 and the roller shaft 4a of the roller 4 is changed and a pushing force between the rollers is changed upon bonding rubbers from both sides of a thread or a sire, a load cell 8, provided on an axle box 7 accommodating the roller shaft 3a, detects the change of the pushing force at both ends of the roller shaft 3a. The value of detection is outputted to a control device, controlling the pushing force within preset range, while the output is compared with a preset pushing force between two sets of rollers in a control device and a signal is outputted to a geared control motor to regulate the pushing force within a predetermined pushing force. According to this method, a gap between the roller 3 and the roller 4 can be controlled automatically so as to have a constant pushing force at all times in accordance with a case in which the target value of variability in the viscosity of the rubber, the speed of a calender roller or the thickness of coating or the like is reduced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a calender roll device, and more specifically, when molding a rubber sheet containing wire, the quality of the mating surface between an upper sheet and a lower sheet is constantly maintained. This invention relates to a calender roll device that is constantly controlled.

[Prior art]

Conventionally, in a calender roll device for forming a rubber sheet containing thread or wire, the distance between the axes of the press roll is
・When molding rubber sheets containing thread or wire,
This has a significant impact on the product accuracy and quality of the bonded surface of the rubber sheet material. For example, if the distance between the shafts is narrow and the pressing force of the rubber sheets is strong, the threads or cords buried between the upper and lower rubber sheets may be disturbed or cut, and the quality of the bonded surfaces of the sheets may deteriorate. In addition, if the center distance is wide and the pressing force of the rubber sheet is weak, air pockets may occur in the threads or cords between the sheets, resulting in a poor quality rubber sheet with air bubbles after molding. There was a problem.

Conventionally, the work of detecting defective parts of the rubber sheet material as described above is carried out by visual inspection by an operator, and the distance between the roll axes is adjusted by an assist screen provided on the roll axes.

However, it is difficult to constantly and reliably visually detect defective portions of the rubber sheet material as described above, and it is a difficult task to perform this at each setup change.

By the way, the factors that cause the distance between the axes of the pressure rolls to change include, for example, when the surface temperature of the roll changes due to room temperature, rubber temperature, temperature controller setting temperature, etc., and when the roll becomes worn due to long-term use. It changes depending on the expansion or contraction of the diameter.

Also, depending on how the rubber itself is kneaded, the specific gravity changes (increase or decrease of air in the rubber), and if the rubber weight is the same, the gauge will change,
Furthermore, it changes depending on the speed of the calender roll, and in this case, it is necessary to adjust the pressing force by changing the speed of the calender roll.

Furthermore, one of the factors that causes changes in the distance between the axes of the press rolls is that when the variation in quality becomes stable during the molding of rubber sheet materials, in order to maintain the processing quality within a certain range and reduce costs, the product Although a control mechanism (D, T, C) is added to lower the quality target value of
If control is performed to lower this target value, the upper and lower gauges will change and the distance between the axes of the press rolls will change.

In this way, if the distance between the axes of the pressure rolls changes due to various factors, the pressing force between the rolls will change, and as mentioned above, this will have a significant impact on the product accuracy and quality of the bonded surface of the rubber sheet material. There was a problem with the effect of

[Purpose of the invention]

This invention was devised by focusing on the conventional problems, and its purpose is to reduce the gap between the pressure rolls so that the pressure is always constant depending on the variation in rubber viscosity, the speed of the calender roll, etc. To provide a calender roll device that automatically controls the quality of the mating surfaces of the upper rubber sheet material and the lower rubber sheet material to always be constant.

[Structure of the invention]

In order to achieve the above object, the present invention provides an apparatus for laminating rubber from both sides of a thread or wire between two rolls, which includes a detection mechanism for detecting a pressing force when laminating the rubber;
The gist of the present invention is to include a control mechanism that controls the pressing force within a preset range.

“　[Embodiments of the invention] The present invention will be described in detail below based on the accompanying drawings.

FIG. 1 shows a calender roll device 1 implementing this invention.
, and FIG. 2 is a side view of FIG.
Consists of 30th rule 4, 40th rule 5, and 20th rule 5.
The roller 3 and the 30th roller 4 are press rolls.

The t-th roll 2 to the 40th-th roll 5 have roll shafts 2a and 3.
an axle box 7 that is rotatably supported by the support frame 6 via a, 4a, and 5a and accommodates the roll shaft 3a of the 20th roll 3;
is provided with a detection mechanism, ie, a load cell 8, that detects the pressing force when rubber is bonded.

Note that the load cell 8 may be attached to the roll shaft 4a of the 30th rule 4.

Further, on the roll shaft 3a of the 20th rule 3, a lifting device 9 is provided.
(reducing screw) is attached, and is configured so that the pressing force with the 30th rule 4 can be adjusted. In FIG. 2, reference numeral 10 indicates a 30th rule: a press roll for applying pressure, and reference numeral 11 indicates a thread or wire embedded between the rubber sheet materials W. Note that 15 indicates a thickness gauge.

Next, a method of controlling pressure during coating of the rubber sheet material W will be explained.

As shown in FIG. 3, when the rubber G is laminated from both sides of the thread or wire 11, the pressing force between the rolls changes when the viscosity of the rubber material or the speed of the calender roll changes, and on the other hand, When control is performed to lower the coating target value when the quality variation becomes stable, the distance between the roll shaft 3a of the 20th rule 3 and the roll shaft 4a of the 30th rule 4 As the distance changes, the pressing force between the rolls changes.

In this way, when the distance between the axes changes and the pressing force between the rolls changes, the load cell 8 provided in the axle box 7 that accommodates the roll shaft 3a detects the change in the pressing force at both ends of the roll shaft 3a. The detected value is output to a mechanism that controls the pressing force within a preset range, that is, the control device 12, and in this control device 12, it is compared with the preset pressing force between the two rolls, and the distance between the axes is determined. If the distance between the shafts is narrower than the set value and the pressing force is strong, a signal to weaken the pressing force is output to the guard control motor 13, and conversely, if the distance between the shafts is wider than the set value and the pressing force is weak. outputs a signal for increasing the pressing force to the guard control motor 13 to adjust the pressing force to a predetermined value.

That is, by outputting respective increase/decrease control signals to the guard control motor 13, the lifting device 9 for raising and lowering the 20th-rule 3 is rotationally driven, and the 20th-rule 3 or the 30th-rule 4 is operated to raise and lower. This is used to adjust the distance between the shafts (pressing force).

The operation of this control device 12 will be explained in more detail with reference to FIG. The -force detection value is output to the deviation detector 23, where it is compared with a value set in advance by the setting device 24 and calculated. And the calculated deviation value is
It is outputted to the increase/decrease detector 26 through the filter circuit 25, and from there the roll gear increase signal X or the roll gear source signal Y is sent to the aforementioned gear control motor 13.
By outputting and rotating the guard control motor 13 in the forward or reverse direction, the lifting device 9 is rotationally driven, and the 20th-rule 3 or the 30th-rule 4 is operated to raise and lower to adjust the distance between the shafts (pressing force). It is something to do.

By automatically performing the above operations during molding of the rubber sheet material W, the gap in the 20th-rule 3 or the 30th-rule 4 can be stabilized to stabilize variations in rubber viscosity, calender roll speed, or quality. When control is performed to lower the target value of lamination when the bonding force is increased, the pressure is automatically controlled so that the pressing force is always constant, and the bonding surface of the upper rubber sheet material and the lower rubber sheet material is This is to control quality at a constant level.

C Effects of the Invention] This invention is an apparatus for laminating rubber from both sides of a thread or wire between two rolls as described above,
Since it has a detection mechanism that detects the pressing force when laminating the rubber and a control mechanism that controls the pressing force within a preset range, it is possible to prevent changes in the center distance of the pressing rolls caused by various factors. However, the roll gap can be precisely controlled so that the pressing force is always constant, and this has the effect that the quality of the mating surfaces of the upper rubber sheet material and the lower rubber sheet material can always be kept constant.

[Brief explanation of drawings]

Fig. 1 is a front view of a calender roll device embodying the present invention, Fig. 2 is a side view of Fig. 1, Fig. 3 is a schematic configuration diagram showing the operating state during molding of rubber sheet material, and Fig. 4 is a control FIG. 2 is an explanatory diagram of the device. 1... Calendar roll device, 8... Load cell,
11... Thread or wire, 12... Control device, W.
・Rubber sheet material.

Claims (1)

[Claims] A device for laminating rubber from both sides of a thread or wire between two rolls, comprising a detection mechanism that detects a pressing force when laminating the rubber, and a control mechanism that controls the pressing force within a preset range. A calendar roll device comprising: