JPH0737028B2 - Vulcanizing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vulcanizing apparatus for fitting a cylindrical unvulcanized molded article such as an unvulcanized belt into a molding mantle and vulcanizing it.

(Prior Art) Conventionally, as a vulcanizing apparatus for fitting a cylindrical unvulcanized molded article such as an unvulcanized belt into a molding mantle and vulcanizing it, as shown in FIG. A rubber sleeve b is attached to the inner circumference of the rubber sleeve b, a heating and pressurizing fluid is supplied to a space c formed between the rubber sleeve b and the outer frame a, and the outer peripheral surface of the rubber sleeve b is unvulcanized. It is known that an unvulcanized molded product e is vulcanized by charging a molding mantle d to which the product e is mounted and heating from inside the molding mantle d.

In such a vulcanizing apparatus, upper and lower flanges f and g for pressing the upper and lower ends of the unvulcanized molded product e mounted on the molding mantle d are fixed to the molding mantle d at substantially fixed positions. And those which are vulcanized without using such upper and lower flanges (for example, see Japanese Patent Publication No. 56-37057).

(Problems to be Solved by the Invention) However, in the former device, since the molding position of the unvulcanized molded product e with respect to the molding mantle d is slightly different each time, the unvulcanized molded product e changes with the change of the molding position. The upper and lower flanges f and g fixed to the forming mantle d cannot follow the change, but the volume at the end of the unvulcanized molded product e becomes excessive or deficient. (See FIGS. 4 and 5). Further, as shown in FIG. 6, when the unvulcanized molded product h is formed by laminating a plurality of rubber sheets hl, the end positions are different for each sheet hl, and the same problem occurs. Then, when vulcanization is performed in such a state, the thickness of the end portion of the vulcanized molded product becomes uneven,
Cannot be used as a product. For example, if the unvulcanized molded product has a width of 300 mm, the end that cannot be used as a product is 20 to 30 mm, and the loss is about 20% in the vertical direction.

Further, in the latter device, a large amount of rubber flows at the end of the molded product during vulcanization, and many parts cannot be used.

Therefore, as an improvement of the former device, it is conceivable that the upper and lower flanges can be moved according to the size of the unvulcanized molded product, that is, the position of the end portion of the unvulcanized molded product.

By the way, the force of the upper and lower flanges that presses the ends of the unvulcanized molded product from the upper and lower sides is equal to or greater than the repulsive force that is generated by this mold force and that pushes the upper and lower flanges back and forth. Need to be And this repulsive force, for example, in the case of a molded product with a wall thickness of 10 mm and a peripheral length of 1000 mm,
It has been confirmed by experiments that it will be about 500 to 600 kg at 10 kg / cm ² , but if such a force is applied to the upper and lower flanges in advance, the ends of the unvulcanized molded product will collapse. I will end up.

The present invention has been made in view of such a point, while moving the upper and lower flanges according to the position of the end of the unvulcanized molded product to press the upper and lower ends of the unvulcanized molded product with an appropriate pressure. By holding this pressed state and performing vulcanization, it is possible to reduce the material loss by allowing vulcanization molding of an unvulcanized molded product to a uniform thickness up to the end without crushing the end. To aim.

(Means for Solving the Problem) In order to achieve the above object, the means for solving the problems of the present invention is to provide a cylindrical outer frame whose upper and lower sides are opened and an outer frame on the inner circumference of the outer frame. A rubber sleeve mounted so as to form an annular space; and a molding mantle charged inside the rubber sleeve and having a cylindrical unvulcanized molded product to be vulcanized mounted on the outer peripheral surface thereof. Vulcanization in which the unvulcanized molded article is vulcanized by supplying a pressurized fluid to the space formed between the rubber sleeve and the outer frame and supplying a heating fluid inside the molding mantle. Assuming a device. An upper flange member is provided above the forming mantle so as to be movable back and forth with respect to the forming mantle, and has an upper contact portion that comes into contact with the upper end of the unvulcanized molded product mounted on the forming mantle by the advancing movement. And a lower side having a lower contact portion which is provided below the forming mantle so as to be movable back and forth with respect to the forming mantle and which abuts on the lower end of the unvulcanized molded product mounted on the forming mantle by the advancing movement. When the flange member and the upper flange member are moved back and forth, and when the upper flange member is moved forward, the upper flange member is moved according to the upper end position of the unvulcanized molded product mounted on the molding mantle so that the upper contact portion is not vulcanized. The upper moving means for locating the upper end of the sulfur molded product at a position where it is pressed with an appropriate pressure, and the lower flange member are moved forward and backward, and at the time of forward movement, the lower flange member is moved to the molding cap It is moved in accordance with the loaded lower end position of the non-vulcanized assembly in and a lower moving means to position the position where the lower contact portion presses the lower end of the yet-vulcanized assembly at an appropriate pressure. The upper and lower moving means are respectively linked to the upper or lower flange member, and are operated by supply and discharge of a working fluid to move the upper or lower flange member forward and backward, and the hydraulic cylinder. When the upper or lower flange member is positioned at a pressing position with respect to the upper and lower ends of the unvulcanized molded product, the operating state in which the working fluid is supplied to and discharged from the hydraulic cylinder so as to operate the cylinder is adjusted. The hydraulic system is switched to a locked state in which the working fluid is prevented from flowing into and out of the hydraulic cylinder so as to stop and lock the operation.

(Operation) Accordingly, in the present invention, the upper and lower flange members are moved by the upper and lower moving means at the time of vulcanization according to the positions of the upper and lower ends of the unvulcanized molded product mounted on the molding mantle. The upper and lower abutting portions are moved and positioned at positions where the upper and lower ends of the unvulcanized molded product are pressed with an appropriate pressure. Thereafter, while pressing the upper and lower ends of the unvulcanized molded product, the hydraulic system for the hydraulic cylinders constituting the upper and lower moving means is switched to prohibit the working fluid from flowing into and out of the hydraulic cylinders. By setting the locked state, the above-mentioned pressed state is maintained and vulcanization is performed.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

In FIG. 1 showing the overall configuration of the vulcanizing apparatus, 1 is a cylindrical outer frame whose upper and lower sides are open, 2 is a cylindrical rubber sleeve attached to the inner circumference of the outer frame 1 by a mounting member 3, Inside, the unvulcanized molded product 5 mounted on the outer peripheral surface of the cylindrical molding mantle 4 is inserted.

A pressurized fluid is fed or discharged into an annular space 6 formed between the outer frame 1 and the rubber sleeve 2 through a supply / discharge port 7 formed in the outer frame 1.

Reference numerals 8 and 9 denote upper and lower flange members, which are disk-shaped substrate portions 8a,
9a, cylindrical upper and lower abutting portions 8b, 9b extending downward or upward from the outer peripheral edge of the substrate portions 8a, 9a, and the substrate portions 8a, 9a
It has rod-shaped upper and lower engagement support portions 8c, 8c, 9c, 9c protruding further upward or downward. The tip ends of the upper and lower engaging support portions 8c, 8c, 9c, 9c of the upper and lower flange members 8, 9 engage with the upper and lower hooks 10, 11 in a disengageable manner. And the lower hooks 10, 11 are piston rods 1 of the upper or lower cylinders 12, 12, 13, 13 as hydraulic cylinders.
It is connected to 2a, 12a, 13a, 13a. As a result, the upper or lower cylinders 12, 12, 13, 13 are activated by the supply and discharge of the working fluid from the drive source (not shown), and the upper or lower cylinders 12, 12, 13, 13 are And the lower flange members 8 and 9 are moved up and down in accordance with the positions of the upper and lower ends of the unvulcanized molded product 5, and the upper and lower abutting portions 8b and 9b move the upper and lower ends of the unvulcanized molded product 5, respectively. It functions as an upper side and a lower side moving means which is positioned at a position where it is pressed with an appropriate pressure.

When the upper and lower flange members 8 and 9 are vertically positioned and the unvulcanized molded product 5 is pressed and fixed, the hydraulic systems for the upper and lower cylinders 12 and 13 are switched,
The switching is performed so as to prevent the working fluid from flowing in and out of the upper and lower cylinders 12, 12, 13, 13.

Reference numeral 14 denotes an injection port member for injecting the heating fluid into the forming mantle 4, which is connected to the piston rod 15a of the cylinder 15 and penetrates the upper flange member 8 to move up and down.

Reference numeral 16 is a discharge port member for discharging the heating fluid from the forming mantle 4.

According to the above configuration, even if the vertical position of the unvulcanized molded product 5 mounted on the outer periphery of the molding mantle 4 varies in the range of S1 to S2 (see FIG. 2), the upper cylinder is correspondingly moved. 1
Since the upper flange member 8 can be moved downward by 2, 12 and the lower flange member 9 can be moved upward by the lower cylinders 13, 13, the upper and lower ends of the unvulcanized molded product 5 can be moved to an appropriate pressure (for example, 50-200kg) can be pressed.

Then, with the upper and lower flange members 8, 9 in the upper and lower positions fixed and the unvulcanized molded product 5 pressed and fixed, the hydraulic systems of the upper and lower cylinders 12, 13 are switched, and the upper and lower cylinders 12, Inflow and outflow of working fluid to 12, 13, 13 is prohibited, and its operation is stopped.
The upper and lower flange members 8 and 9 are locked and fixed, and even if a mold force is applied to move the upper and lower flange members 8 and 9 upward or downward, they do not move. As a result, the upper and lower ends of the unvulcanized molded product 5 are pressed against the upper and lower flange members 8 and 9 with a proper pressure without a gap, and vulcanization is performed while maintaining a uniform pressure state. It is possible to obtain a vulcanized molded product that can be made into a product up to a part.

Once vulcanization is complete, the upper and lower cylinders 12, 12, 13, 1
It suffices to supply and discharge the working fluid to and from the vulcanized molded product 5 to separate the upper and lower flange members 8 and 9 from each other.

The vulcanized molded product thus obtained can be used as a product up to the end portion, and is extremely advantageous in terms of material and cost.

Further, when the unvulcanized molded article 5 is molded by laminating unvulcanized rubber sheets (see FIG. 6), conventionally it is not possible to make the volume uniform due to the positional step at the end of each sheet. However, in the above embodiment, if the pressing force by the upper and lower flange members 8 and 9 is set to an appropriate value, that is, the pressing force is about 1.1 to 1.2 times that of the case where the volume of the end is uniform. If so, it is possible to correct the non-uniformity of the volume and obtain a large product yield.

(Effect of the invention) As described above, the present invention moves the upper and lower flange members by the upper and lower moving means in accordance with the upper and lower end positions of the unvulcanized molded product mounted on the molding mantle. The upper and lower abutting portions are positioned at positions where the upper and lower ends of the unvulcanized molded product are pressed with an appropriate pressure, and in this pressed state, the working fluid flows out to the hydraulic cylinders constituting the upper and lower moving means. By prohibiting entry and locking the operation of the hydraulic cylinder to stop and lock, the vulcanization is performed while maintaining the above-mentioned pressed state, so that the upper and lower ends of the cylindrical unvulcanized molded product are crushed. It is possible to vulcanize and mold evenly to the end without increasing the effective ratio of product width to vulcanization width of the molded product, reduce material loss and reduce cost. .

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is an overall configuration diagram of a vulcanizing apparatus, and FIG. 2 is a state before upper and lower flange members press an unvulcanized molded product. FIG. FIG. 3 is a block diagram of a conventional vulcanizing apparatus, FIGS. 4 and 5 are diagrams showing a relationship between a conventional flange and an end portion of an unvulcanized molded product, and FIG. 6 is an unvulcanized molded product. It is explanatory drawing at the time of laminating | stacking an unvulcanized rubber sheet and shape | molding. 1 ... Outer frame, 2 ... Rubber sleeve, 4 ... Molding mantle, 5 ...
Unvulcanized molded product, 6 ... Space, 8 ... Upper flange member, 8b ...
Contact part, 9 ... Lower flange member, 9b ... Contact part, 12 ... Upper cylinder, 13 ... Lower cylinder.

Claims (1)

[Claims] 1. A cylindrical outer frame whose upper and lower sides are opened, a rubber sleeve attached to the inner periphery of the outer frame so as to form an annular space between the outer frame and the rubber sleeve, and A molding mantle, which is charged inside and a cylindrical unvulcanized molded product to be vulcanized is attached to the outer peripheral surface, and supplies a pressurized fluid to the space formed between the rubber sleeve and the outer frame. A vulcanization device configured to vulcanize and form the unvulcanized molded article by supplying a heating fluid into the forming mantle, and moving forward and backward with respect to the forming mantle above the forming mantle. An upper flange member having an upper contact portion which is provided so as to come into contact with the upper end of the unvulcanized molded product mounted on the molding mantle by advancing movement, and moves back and forth with respect to the molding mantle below the molding mantle. Established as possible A lower flange member having a lower contact portion that comes into contact with the lower end of the unvulcanized molded product mounted on the molding mantle, and the upper flange member is moved forward and backward, and when moving forward, the upper flange member is molded as described above. An upper moving means that moves the upper vulcanized molded article attached to the mantle in accordance with the upper end position of the unvulcanized molded article so that the upper contact portion presses the upper end of the unvulcanized molded article with an appropriate pressure; The flange member is moved back and forth, and at the time of the forward movement, the lower flange member is moved in accordance with the lower end position of the unvulcanized molded product mounted on the molding mantle so that the lower contact portion is of the unvulcanized molded product. A lower moving means for locating the lower end at a position where it is pressed with an appropriate pressure, and the upper moving means and the lower moving means are respectively linked to the upper flange member or the lower flange member, and are operated by supplying and discharging the working fluid. The upper side or A hydraulic cylinder that moves the side flange member forward and backward, an operating state in which a working fluid is supplied to and discharged from the hydraulic cylinder so as to operate the hydraulic cylinder, and the upper or lower flange member is above and below the unvulcanized molded product. And a hydraulic system that switches to a locked state that prohibits the flow of the working fluid into and out of the hydraulic cylinder so as to stop and lock the operation of the hydraulic cylinder when the hydraulic cylinder is positioned at the pressing position with respect to the end. And vulcanization equipment.