JP2561965Y2 - Continuous vulcanization equipment for rubber sheets - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous vulcanizing apparatus for a rubber sheet, which is capable of forming an arbitrary pattern on the surface of the rubber sheet.

[0002]

2. Description of the Related Art As a method of vulcanizing a rubber sheet, there is known a method of forming an uneven pattern on the surface of the rubber sheet while vulcanizing the rubber sheet. For example, in a vulcanization method using a press machine, when an unvulcanized rubber sheet is supplied between the upper and lower hot plates of the press machine, the fabric is superimposed on both front and back surfaces of the rubber sheet and supplied to the press machine. There is known a method of transferring unevenness of a cloth to both front and back surfaces of a rubber sheet by applying pressure and heating in a heated state. Further, as a continuous vulcanizing device, a rotocurer is known in which an unvulcanized rubber sheet is sandwiched between a rotating heating cylinder and an endless steel belt that is wound around the heating cylinder and rotates. When supplying the unvulcanized rubber sheet between the heating cylinder and the steel belt, the fabric is continuously superimposed and supplied on both the front and back surfaces of the rubber sheet, and pressurized and heated between the heating cylinder and the steel belt, There is known a method of transferring the texture of a cloth to a rubber sheet.

[0003]

The above-mentioned method using a press machine is characterized in that an unvulcanized rubber sheet is intermittently supplied to a press machine by the length of its hot plate and vulcanized, and at the same time, a cloth is provided on both front and back surfaces. However, there is a problem in that continuous processing cannot be performed, the peeling of the fabric after the completion of vulcanization is difficult, and the number of steps increases in order to prevent wrinkles of the fabric. In addition, the method using a roto-curer can perform vulcanization and patterning continuously, but since the cloth is overlaid on an unvulcanized rubber sheet, peeling and wrinkling of the cloth are performed in the same manner as when using a press machine. It was difficult to prevent the occurrence.

[0004] This invention makes it possible to make patterning continuous by using a roto-curer, and eliminates the conventional wrinkles and difficulties in peeling by using a calendar roll instead of a conventional cloth. is there.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a continuous heating rubber cylinder and an endless steel belt which is wound around the heating cylinder and rotates an unvulcanized rubber sheet. A continuous vulcanizing device for a rubber sheet, comprising a pair of upper and lower calendar rolls having an arbitrary embossed pattern provided on the rubber sheet discharge side of the heating cylinder and the steel belt. Device.

[0006] The position where the above-mentioned calendar roll is provided is an area between the heating cylinder and the rubber sheet discharge side of the steel belt and the cooling zone of the vulcanized rubber sheet, where the rubber sheet has not dropped much from the vulcanization temperature, For example, a high temperature range in which the difference between the vulcanization temperature and the rubber sheet temperature is within 40 ° C. is preferable. When a hot chamber for after curing is provided between the rubber sheet discharge side and the cooling zone, the calendar roll may be provided on either the heating cylinder side or the cooling zone side of the hot chamber. , The heating cylinder side is more preferable. The temperature of the calendar roll is 100 to 200 ° C., and the pressing force is 1
Each is preferably 0 to 50 kg / cm ² .

[0007]

When an unvulcanized rubber sheet is supplied to a continuous vulcanizing device, the rubber sheet is sandwiched between a heating cylinder and a steel belt and advances with the steel belt. Sulfuration proceeds. Then, when the vulcanization progresses to a considerable extent or is completed and the rubber sheet separates from the heating cylinder and the steel belt and is still in a state of plasticity at a high temperature, this rubber sheet is pressed by a pair of upper and lower calender rolls. Therefore, the embossed pattern of the calendar roll is clearly transferred to the rubber sheet, and the rubber sheet is easily peeled off from the calendar roll. And, as the temperature of the rubber sheet at the position of the calendar roll is closer to the vulcanization temperature, clearer patterning becomes possible.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG.
The heating cylinder 12 and the third heating cylinder 13 are arranged in a staggered manner from bottom to top, and the second heating cylinder 1
2, a tension roller 14 is provided in front of (right side in the figure), and an endless steel belt 15 is wound around these three heating cylinders 11, 12, 13 and the tension roller 14 to constitute a continuous vulcanizing apparatus 10. Have been. In this embodiment, a pair of upper and lower calendar rolls including a bottom roll 16 and a top roll 17 are provided above the third heating cylinder 13, and a hot chamber 18 for after curing, a cooling zone, The devices (not shown) are arranged in order. 17A is a pressurizing device for urging the top roll 17 of the calendar roll downward.

The first heating cylinder 11 is set at 100 ° C.
Then, the second heating cylinder 12 is heated to 190 ° C. and the third heating cylinder 13 is heated to 170 ° C. by steam, respectively, and a cloth pattern is formed on the surfaces of the upper and lower calendar rolls 16 and 17. It was heated and a pressure of 50 kg / cm ² was applied. The steel belt 15 is run in the direction of the arrow at a speed of 1.5 m / min, and an unvulcanized rubber sheet 20 having a thickness of 2 mm is superimposed on the steel belt 15 traveling from the first heating cylinder 11 to the second heating cylinder 12. The rubber sheet 20 is supplied to the second heating cylinder 12 and the steel belt 1.
5 and heat while pressing, then apply a textured pattern between the calender rolls 16 and 17 on both sides of the rubber sheet 20 and send it to the hot chamber 18 at 170 ° C. to complete vulcanization. Thus, a vulcanized rubber sheet 20A having a cloth-like uneven pattern was obtained.

In the above embodiment, the calender rolls 16 and 17 are provided on the inlet side of the hot chamber 18, but the calender rolls 16 and 17 on the inlet side are omitted.
A pair of calendar rolls 1 is provided at the outlet side of the hot chamber 18.
6a and 17a can be provided. When the processing speed is set low, the hot chamber 18 can be omitted.

[0011]

As described above, in this invention, a pair of upper and lower calender rolls having an arbitrary emboss pattern are provided on the heating cylinder of the continuous vulcanizing apparatus and the rubber sheet discharge side of the steel belt. When the vulcanization of the rubber sheet has progressed to a considerable extent or has been completed, and the rubber sheet is still in a heated state, the rubber sheet is sandwiched between a pair of upper and lower calender rolls, and the embossed pattern of the calendar roll is placed on the rubber sheet. Is clearly and continuously transferred. Therefore, the rubber sheet is easily peeled off from the calendar roll, and the damage caused by the peeling does not occur unlike the related art. Further, since no cloth is used unlike the conventional case, there is no possibility of wrinkles.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of the present invention.

[Explanation of symbols]

10: continuous vulcanizing device, 11: first heating cylinder, 12:
Second heating cylinder, 13: Third heating cylinder, 14: Tension roller, 15: Steel belt, 16, 17: Calendar roll, 17A: Pressurizing device, 18: Hot chamber for after cure, 20: Unvulcanized rubber Sheet, 20A:
Vulcanized rubber sheet.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B29L 7:00

Claims (1)

(57) [Scope of request for utility model registration] 1. A continuous rubber sheet for continuously vulcanizing an unvulcanized rubber sheet by sandwiching an unvulcanized rubber sheet between a rotating heating cylinder and an endless steel belt wound around the heating cylinder and rotating. A vulcanizing apparatus for continuously vulcanizing a rubber sheet, comprising a pair of upper and lower calendar rolls having an arbitrary embossed pattern provided on the rubber sheet discharge side of the heating cylinder and the steel belt.