JP2757502B2 - Stock guide device in calendar device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a stock guide device in a calendar device.

[Prior Art] Conventionally, a calendar device has been used for forming a plastic sheet or a rubber sheet. In the calendar device, a plastic material or a rubber material is used to form a plastic sheet or a rubber sheet having a predetermined width. A stock guide plate that regulates the sheet width is installed in the bank that supplies the plastic raw material.

As a stock guide device provided with such a stock guide plate, for example, JP-A-51-71360 and JP-B-58-4
There is one disclosed in Japanese Patent Publication No. 8329. 5 and 6, an example of the stock guide device disclosed in the above-mentioned publication will be described. The stock guide device 1 is located above the two calendar rolls 3 and 4 arranged adjacent to the calendar device 2. And are arranged on both sides of the calendar rolls 3 and 4 in the direction of the axis l.

That is, a plurality of guide rods 7 arranged in parallel with each of the calendar rolls are slidably fitted to the guide frames 6 erected on the left and right outer sides of the calendar device 2.
A vertically oriented support plate 8 is connected to an end of the guide rod 7 on the side of the calendar rolls 3 and 4 so as to be located above the calendar rolls 3 and 4.
A stock guide plate 9 whose lower end is machined to have an appropriate radius of curvature according to the outer diameter of the calendar rolls 3, 4 is attached to the inner surface 8a on the center side in the direction of the four axis l so that the height can be adjusted. The bank 5 is formed by the space surrounded by 4 and the left and right stock guide plates 9.

A screw shaft 10 is connected to the support plate 8 in parallel with the guide rod 7. A worm nut of a power transmission device 11 mounted on the guide frame 6 is attached to a screw portion 10 a of the screw shaft 10.
The worm nut 17 is rotated via a worm 13 which is internally fitted to the motor 17 and driven by a motor 12, and the screw shaft 10 is rotated by the rotation of the worm nut 17 so that the calendar rolls 3, 4
In the direction of the axis l.

In the drawing, 9a is a lower-end radius of curvature provided at the lower end of the stock guide plate 9, 14 is a long hole provided in the support plate 8 so as to extend in the vertical direction, and 15 is provided in multiple stages below the calendar roll 4. The calender roll 16 is a molded plastic or rubber sheet, and M is a plastic raw material such as a plastic raw material or a rubber raw material.

When the sheet 16 is formed, the worm 13 is rotated by the worm 13 driven by the prime mover 12, and the rotation of the worm nut 17 causes the screw shaft 10 to move forward and backward in the direction of the axis l. The position of the left and right stock guide plates 9 is adjusted to the width of the sheet 16 to be formed by adjusting the position of the stock guide plate 9 in the direction of the axis of the calendar rolls 3 and 4 via the support plate 8. 8 is loosened through the long hole 14, the height of the stock guide plate 9 is adjusted, and after the adjustment is completed, the stock guide plate 9 is fastened to the support plate 8 again by the bolt. To adjust the height of the stock guide plate 9, the lower end radius of curvature 9a of the stock guide plate 9 is brought into close contact with the outer peripheral surface of the calendar rolls 3, 4 or the outer peripheral surface of the calendar rolls 3, 4 and the lower end radius of the stock guide plate 9 are adjusted. A slight gap is formed between the portion 9a.

The plasticized raw material M in a softened state is supplied to the bank 5 by an appropriate means, kneaded in the bank 5 and sent out in a sheet form from between the calender rolls 3 and 4, and passed through a plurality of calender rolls 15 to the sheet 16. And sent to the post-processing step.

[Problem to be Solved by the Invention] In the above-mentioned stock guide device 1, the stock guide plate 9
When contact is made with the calendar rolls 3 and 4, a gap is partially formed between the stock guide plate 9 and the calendar rolls 3 and 4 due to wear of the stock guide plate 9; Remove the guide plate 9 from the support plate 8,
It needs to be carried out of the line and reprocessed.

When a gap is provided between the stock guide plate 9 and the calender rolls 3 and 4 from the beginning, or when a gap is formed between the stock guide plate 9 and the calender rolls 3 and 4 due to wear, this is left as it is. When the plastic raw material M enters the gap, the plastic raw material M enters the gap, and the plastic raw material M that has entered the gap stays and hardens or burns, thereby adversely affecting the product. In addition, it is necessary to move the stock guide plate 9 upward to increase the gap, and remove the plastic raw material M that the operator has manually entered from the gap, which is complicated.

Further, since the stock guide plate 9 is moved by the screw shaft 10, accurate positioning is difficult, and therefore, the width dimension accuracy of the formed sheet 16 cannot be improved.

In view of the above situation, the present invention does not require reworking the stock guide plate, or eliminates the need for an operator to manually remove the plastic raw material that has entered between the stock guide plate and the calendar roll, and further reduces the width. It is an object of the present invention to provide a stock guide device in a calendar device capable of forming a sheet having good dimensional accuracy.

[Means for Solving the Problems] According to the present invention, a stock guide plate is arranged above both sides in the axial direction of two adjacently arranged calendar rolls so that the position of the calendar rolls in the axial direction can be adjusted. And in a calender device that supplies a plastic raw material to the bank formed by the calendar roll and the stock guide plate and sends out the plastic raw material from between the calender rolls so that a sheet can be formed, the stock guide plate includes:
An internal hollow portion capable of introducing and discharging a fluid is provided, and at least one of a curvature radius portion facing the calender roll and an inner surface facing the center side in the calender roll axial direction of the stock guide plate is formed of an elastic member. is there.

[Operation] When the radius of curvature of the stock guide plate facing the calender roll is formed by an elastic member, a fluid is supplied to the hollow portion to expand the radius of curvature and make contact with the outer peripheral surface of the calender roll to supply the bank. There is no leakage out of the plastic material bank. In this case, even if the radius of curvature is worn, the radius of curvature of the stock guide plate expands and constantly contacts the calendar roll, so even if the radius of curvature is worn, it is ensured that the plastic material leaks out of the bank. Can be prevented.

When the radius of curvature of the stock guide plate is not brought into contact with the calendar roll, the plastic raw material enters the gap formed between the radius of curvature and the calendar roll, but the radius of curvature is repeatedly expanded and contracted. The plastic material that has entered can be discharged out of the gap.

When the inner surface of the stock guide plate is formed of an elastic member, the size between the inner surfaces of the stock guide plate can be accurately set by expanding or contracting the inner surface of the stock guide plate, and the width of the formed sheet becomes good. .

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIGS. 1 to 3 show an embodiment of the present invention, and the basic configuration is the same as that of FIGS. 5 and 6. FIG. In the drawings, the same components as those shown in FIGS. 5 and 6 are denoted by the same reference numerals.

On the inner surface 8a of the support plate 8, a horizontal flange 8b protrudes toward the center of the calendar rolls 3 and 4 in the direction of the axis l, and a space formed by the inner surface 8a of the support plate 8 and the lower surface of the horizontal flange 8b includes: A stock guide plate 18 is attached.

The stock guide plate 18 is made of, for example, an elastic member such as resin, rubber, or metal, has an internal hollow portion 18a, and has a lower end with a lower radius of curvature 18b having a radius of curvature corresponding to the outer diameter of the calendar rolls 3, 4. Are formed. A fluid 21 such as hot water can be supplied to the internal hollow portion 18a of the stock guide plate 18 by a pump 19 through a pipe 20.
With 21, the lower end radius of curvature 18 b of the stock guide plate 18 and the inner surface 18 c on the center side of the calendar rolls 3 and 4 in the direction of the axis l can be expanded. In addition, the fluid in the internal hollow portion 18a of the stock guide plate 18 is supplied from the pipe 22 to the tank 2 if unnecessary.
It can be discharged to 3.

 In the figure, 24 and 25 are valves.

When molding plastic or rubber sheets,
5 and 6, the screw shaft 10 is moved back and forth in the direction of the axis l of the calendar rolls 3 and 4, and the stock guide plate 18 is moved through the support plate 8 in the direction of the axis l of the calendar rolls 3 and 4. To the position, open the valve 24 and close the valve 25,
The pump 19 is driven to introduce a fluid 21 having a predetermined pressure into the internal hollow portion 18a of the stock guide plate 18 through the pipe 20. As a result, a part of the lower-end radius of curvature 18b of the stock guide plate 18 expands and comes into contact with the outer periphery of the calendar rolls 3 and 4 as shown in FIG. The dimension W between the inner surfaces 18c of the left and right stock guide plates 18 expands as shown by the two-dot chain line, and is finely adjusted according to the sheet width.

In the above configuration, the lower-end radius of curvature portion 18b of the stock guide plate 18 is worn by friction with the calendar rolls 3 and 4 during sheet forming, but a high-pressure fluid 21 is introduced into the internal hollow portion 18a of the stock guide plate 18. Therefore, the lower-end radius of curvature portion 18b of the stock guide plate 18 expands and constantly contacts the outer peripheral surfaces of the calendar rolls 3 and 4, so that the formation of the gap t is prevented. Therefore, since the plastic raw material M does not enter the gaps, it is possible to obtain a good quality product which does not adversely affect the sheet 16 (see FIG. 5) as a product, such as burning.

Also, when the lower end radius of curvature 18b of the stock guide plate 18 is not in contact with the calendar rolls 3 and 4 and the operation is performed with a gap t, the lower end radius of curvature of the stock guide plate 18
Even if the plastic raw material M enters between the outer peripheral surfaces of the calendar rolls 18 and 18b, the fluid 21 is supplied from the pump 19 to the internal hollow portion 18a of the stock guide plate 18 and the fluid in the internal hollow portion 18a is discharged to the tank 23. Alternately, the stock guide plate 18 is expanded and contracted, and the plastic material M that has entered can be discharged to the bank 5 side or the outside of the stock guide plate 18 (the side opposite to the bank 5).

In addition, since the size W between the inner surfaces 18C of the left and right stock guide plates 18 can be finely adjusted by expansion or contraction of the stock guide plates 18, a sheet having good width dimensional accuracy can be obtained.

The pressure P of the fluid 21 introduced into the internal hollow portion 18a of the snack guide plate 18 and the lower curvature radius portion 18 of the stock guide plate 18
The relationship of the contact arc length L (see FIG. 3) to the calender rolls 3 and 4 is shown in FIG. 4. When the pressure of the fluid 21 increases, the contact arc length L increases and the stock guide plate 18 The lower end curvature radius portion 18b is in good contact with the outer peripheral surfaces of the calendar rolls 3 and 4, and the plastic raw material M is
The danger of entering between the lower-end radius of curvature portion 18b and the outer peripheral surfaces of the calendar rolls 3 and 4 is significantly reduced.

In the embodiment of the present invention, the case where the entire stock guide plate 18 is made of an elastic member and both the lower-end radius of curvature portion 18b and the inner surface 18c are expanded has been described. Part 18b or inner surface 18c
Either of the elastic member, expandable and contracted portion of the elastic member can be implemented, as the fluid 21 can be used air or oil in addition to warm water, other, It goes without saying that various changes can be made without departing from the spirit of the present invention.

[Effect of the Invention] According to the stock guide device in the calendar device of the present invention, when the stock guide plate is used with the radius of curvature of the stock guide plate in contact with the calendar roll, the radius of curvature is always worn even if the radius of curvature is worn. Therefore, no gap is formed between the radius of curvature of the stock guide plate and the calendar roll, and there is no risk of burning of the sheet caused by the plastic raw material entering the gap. When the quality is improved and the radius of curvature of the stock guide plate is used without contacting the calendar roll, the plastic guide material is repeatedly expanded and contracted even if the plastic material enters the gap, thereby discharging the entered plastic material. Can be removed, which eliminates the need for manual removal by the operator, simplifies the work, and furthermore makes the stock guide plate Since fine adjustment of the size of the inner width is possible, various excellent effects such as improvement in the width dimension accuracy of the sheet can be achieved.

[Brief description of the drawings]

FIG. 1 is a front view of one embodiment of the present invention, and FIG.
FIG. 3 is a side view when the radius of curvature of the lower end of the stock guide plate is expanded in the present invention, FIG. 4 is a graph showing the relationship between the pressure of fluid and the contact arc length of the stock guide plate, FIG. 5 is a side view of one example of the conventional art, and FIG.
FIG. 6 is a view taken in the direction of arrows VI-VI in FIG. In the figure, 1 is a stock guide device, 2 is a calendar device, 3, 4,
15 is a calendar roll, 5 is a bank, 16 is a sheet, 18 is a stock guide plate, 18a is an inner hollow portion, 18b is a lower radius of curvature (radius of curvature), 18c is an inner surface, 21 is a fluid, M is a plastic material, l indicates an axis.

Claims (1)

(57) [Claims] 1. A stock guide plate is arranged above both sides of two calendar rolls adjacent to each other in the axial direction so as to adjust the position of the calendar rolls in the axial direction. In a calender device that supplies a plastic raw material to the bank formed by and sends out the plastic raw material from between the calender rolls, so that a sheet can be formed, the stock guide plate includes:
In addition to providing an internal hollow portion through which fluid can be introduced and discharged, at least one of a radius of curvature portion facing the calender roll and an inner surface facing the center of the calender roll in the axial direction of the stock guide plate is formed by an elastic member. A stock guide device in the calendar device.