JP3528092B2 - Method of vulcanizing rubber extruded products - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for vulcanizing a rubber extrudate such as a weather strip, and more particularly to a method for conveying a rubber extrudate through a vulcanizing furnace.

[0002]

2. Description of the Related Art A description will be given with reference to FIGS. Conventionally, when a rubber extruded product 20 such as a weather strip extruded from an extruder 10 is passed through a vulcanizing furnace 30 for vulcanization,
It is carried on a belt 41 of a belt conveyor 40 or a driving roller 51 of a roller conveyor 50 (used in a vulcanizing furnace called a Conron furnace).

However, the rubber extruded product 20 is liable to be plastically deformed until the vulcanization is completed, and in the above-mentioned conveying method, depending on the way of placing during the conveying, it may endure its own weight and foaming pressure, and the initial shape thereof may be taken. It may not be held and may be deformed (collapsed). Therefore, it is necessary to form the flat surface 21 in the portion that comes into contact with the belt 41 or the like, and to provide the extra burr 22 in the easily deformed portion as shown in FIG. Also during vulcanization,
As shown in FIG. 2 or FIG. 4, since heating is possible only with the flat surface 21 facing downward, uneven heating occurs due to the influence of heat, and there is a difference in expansion and contraction, so that the lower part expands more than the upper part. As shown in FIG. 6, it is curved and has an R. For example, with respect to a weather strip, it must be bent in the opposite direction to the assembling direction at the time of assembling, and the deformation after assembling becomes large. There is a problem.

[0004]

The problem to be solved is that the above-mentioned conventional method for vulcanizing a rubber extruded product is liable to be plastically deformed until its vulcanization is completed, and the self-weight It may not be able to withstand the foaming pressure and may deform (collapse) without being able to retain its original shape. It is necessary to make the part that comes into contact with the belt flat or to provide an extra burr on the easily deformable part. There is a problem such as.

[0005]

Means for Solving the Problems A description will be given with reference to FIGS. 1, 3, and 7 to 12. The first invention is an extruder 10.
Extrusion of rubber such as weather strip extruded from the vulcanization furnace 30 for vulcanization is carried on the belt 41 of the belt conveyor 40 or the drive roller 51 of the roller conveyor 50 and conveyed. In the method of vulcanizing an object, the rotors 60 formed along the contour of the lower portion of the rubber extruded product 20 are provided at a plurality of points in the conveying section, and the rubber extruded product 2 is formed by the rotors 60.
0 is intended to support from below.

A second aspect of the invention is the rotating body 6 according to the first aspect of the invention.
No. 0 is composed of a large number of bead-shaped small rotating bodies 62 which pass through a shaft 61 formed in a shape along the widthwise outline of the lower portion of the rubber extruded product 20.

A third aspect of the invention is the rotating body 6 according to the first aspect of the invention.
0 is an integral roller-shaped rotating body 66 that is passed through a horizontal shaft 65.
It consists of

[0008]

EXAMPLES Explaining examples, 10 is an extruder,
Reference numeral 20 denotes a rubber extruded product such as a weather strip extruded from the extruder 10, 30 denotes the rubber extruded product 20.
A vulcanizing furnace for vulcanizing the rubber, 40 and 50 are a belt conveyor and a roller conveyor, respectively, and the rubber extruded product 20 is conveyed by either one and passed through the vulcanizing furnace 30.
Reference numerals 41 and 51 respectively denote a belt on which the rubber extruded product 20 is placed, a driving roller, and 60 denotes a plurality of points in a conveying section including the vulcanization furnace 30 (the belt conveyor 40 has a belt 41.
Drive roller 51, 5 in the Konron furnace at any point
1)), which is a rotating body that supports the rubber extruded product 20 from below, and the shape of a line connecting the highest points thereof in the width direction follows the contour of the lower portion of the rubber extruded product 20 in the width direction. Although it is formed as described above, and various embodiments are conceivable, a typical one is as follows. The first one is that the rotating body 60 is composed of a large number of bead-shaped small rotating bodies 62 that pass through a shaft 61 formed in a shape along the widthwise contour of the lower portion of the rubber extruded product 20, and the second one is Is the horizontal axis 6
It is composed of an integral roller-shaped rotating body 66 passed through 5. The bead-shaped small rotating body 62 may be a sphere, or may be flattened, and the small-diameter beads 63 may be interposed therebetween.

To explain the operation, the rubber extruded product 20 extruded from the extruder 10 passes through the vulcanization furnace 30 and is vulcanized on the belt 41 of the belt conveyor 40 or the driving roller 51 of the roller conveyor 50. And is supported by a rotating body 60 provided at a plurality of points in the transport section from below and transported. Since the shape of a line connecting the highest points of the latter rotating body 60 in the width direction is formed along the contour in the width direction of the lower portion of the rubber extruded product 20, a flat portion is formed on the surface of the rubber extruded product 20. Even if it is not formed, or even if the extra burr 22 is not provided in the easily deformable portion, it is not deformed (collapsed) during conveyance, and uniform heating is possible, and it does not bend.

[0010]

Since the present invention is constructed as described above,
When the rubber extruded product 20 such as a weather strip extruded from the extruder 10 is passed through the vulcanization furnace 30 and vulcanized, the rubber extruded product 20 is simply provided by providing a simple rotating body 60 at a plurality of positions in the conveying section. Therefore, it is not necessary to form a flat portion on the surface or to provide an extra burr 22 on the easily deformable portion. Note that conventionally, the rubber extruded product 20 is vulcanized in the vulcanization furnace 30 and deforms at the point of crosslinking, so it was necessary to press the guide roller and restore it to its original shape, but this is not necessary either. It was

[Brief description of drawings]

FIG. 1 is a side view showing an example of the whole.

FIG. 2 is a sectional view taken along line AA of FIG. 1 showing a conventional example.

FIG. 3 is a side view showing another example of the whole.

FIG. 4 is a sectional view taken along line BB of FIG. 3 showing a conventional example.

FIG. 5 is a cross-sectional view showing a state in which a shape-retaining burr is attached in a conventional example.

FIG. 6 is a perspective view showing a curved state of a product according to a conventional example.

7 is a sectional view taken along line AA when the first example of the present invention is applied to the vulcanizing furnace of FIG.

FIG. 8 is a side view of FIG. 7.

FIG. 9 is a partial side view when the second example of the present invention is applied to the vulcanizing furnace of FIG. 1 or 3.

FIG. 10 is a front view showing a rotating body according to a first example of the present invention.

FIG. 11 is a front view showing another rotating body of the first example of the invention.

FIG. 12 is a front view showing a rotating body according to a second example of the present invention.

[Explanation of symbols]

10 extruder 20 Rubber extrudate 21 plane 22 Bali 30 Vulcanizing furnace 40 belt conveyor 41 belt 50 roller conveyor 51 drive roller 60 rotating body 61 axes 62 Bead-shaped small rotating body 63 small beads 65 Horizontal axis 66 Roller-like rotating body

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliographic references Sho 59-181731 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) C08C 19/00-19/44 C08F 8 / 00-8/50 B29C 35/00

Claims (3)

(57) [Claims] 1. A vulcanization furnace (3) is provided with a rubber extruded product (20) such as a weather strip extruded from an extruder (10).
In the method for vulcanizing a rubber extruded product, the rubber is placed on the belt (41) of the belt conveyor (40) or on the driving roller (51) of the roller conveyor (50) for vulcanization through 0). Extruded product (2
0) A rotating body (6
0) is provided at a plurality of points in the conveying section of the rubber extruded product (20), and the rubber extruded product (20) is supported from below by the rotating body . 2. The rotating body (60) is a rubber extruded product (2).
0) The method for vulcanizing a rubber extruded product according to claim 1, comprising a large number of bead-shaped small rotating bodies (62) which pass through a shaft (61) formed in a shape along the widthwise contour of the lower portion. 3. The rotating body (60) comprises an integral roller-like rotating body (66) passed through a horizontal shaft (65).
A method for vulcanizing the rubber extruded product described.