JPH0237844B2 - TAIYAKARYUKINOKANAGATAKOKANHOHO - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold replacement method for a tire vulcanizer.

In tire vulcanizers, tires are pressurized and molded in a mold, but when replacing this mold,
It took a long time to lift the mold into the vulcanizer using a forklift, center it in the center of the vulcanizer, attach it to the vulcanizer with bolts, and preheat the mold. In addition, a mold mounting method has already been proposed to automate mold mounting, but this method has limitations in applying to the wide variety of molds that are already in use. Changing the structure of the mold, etc. to deal with it requires a lot of cost, and it has been very difficult to automate the mold installation.

The present invention addresses the above-mentioned problems by assembling a mold and a hot plate for heating the same mold in advance, and supplying a heating medium to the hot plate at an appropriate position outside the vulcanizer to mold the mold. This invention relates to a method for replacing a mold in a tire vulcanizer, which is characterized in that the mold is replaced by preheating the mold and the hot plate, and then assembling the mold and the hot plate as one body into the vulcanizer. By doing so, it is possible to easily achieve labor-saving and automation of the positioning of the mold in the vulcanizer, the attachment and detachment of the mold, and automation. Another object of the present invention is to provide an improved method for replacing molds of a tire vulcanizer that can improve the operating rate of the vulcanizer.

Next, the method for changing molds of a tire vulcanizer according to the present invention will be explained based on the mold changing device shown in FIGS. 1 to 3. 1 is a tire vulcanizer body base; A register ring 2 is attached to the register ring 1, and a lower hot plate 3 is fitted thereto, and a lower mold 4 is installed on the lower hot plate 3 by tightening bolts 5. Also, an upper mold 6 that forms a mold with the lower mold 4
is attached via an upper hot plate 8 to a bolster 7 provided in a vulcanizer mold opening/closing mechanism (not shown). Note that 9 is a bolt for fixing the upper mold 6 and the upper hot plate 8. Furthermore, a so-called swing cylinder (a type of swing cylinder in which the cylinder rod is expandable and retractable and the rod can rotate approximately 90 degrees when retracted) is attached to the base 1, and the upper surface of the clamp fitting 10a at the end of the rod is heated under heat. The lower surface of the clamp fitting 10a engages with the lower surface of the collar 3c on the outer periphery of the plate 3 so that the lower heating plate 3 moves up and down as the rod of the cylinder moves up and down. It is adapted to be removably engaged with. Further, the bolster 7 and the upper hot plate 8 are connected by providing the bolster 7 with a cylinder similar to the cylinder described above, or by simply using bolts.
In addition, the upper and lower heating plates 3 and 8 have steam supply and exhaust pipes 3, respectively.
a, 3b, 8a, 8b are provided, quick couplings (quick couplings) 11a, 11b, 12a, 12
b through the bolster 7 and the piping 1 on the base 1 side.
3a, 13b, 14a, and 14b in a detachable manner. Further, the mold exchange cart A is movable with wheels 15. Further, on the upper surface of the frame of the truck A, there are a group of rotating rollers 16 and a pair of arms 17 that can move in and out, and each arm 17 can move between the group of rollers 16 while being guided by a guide roller 18. . Further, a large number of rotary ball bearings 19 are attached to the upper surface of the arm 17, and a roller group 20 is attached to the lower surface of the arm 17 for easy movement on the cart A and the base 1. Note that a centering block 1a is fixed to the base 1, and a wedge portion 3e of the lower heating plate 3 is fitted into this,
Centered relative to base 1. Furthermore, there is a heat insulating plate between the lower hot plate 3 and the lower mold 4,
Illustrations are omitted.

Next, the operation of the mold changing device of the tire vulcanizer will be explained. When replacing the molds, attach the upper and lower molds 4 and 6 to the upper and lower hot plates 3 and 8 with bolts 5 and 9, and after assembling 4 and 3 and 6 and 8 respectively, connect the piping at appropriate positions outside the vulcanizer. Steam is passed through the upper and lower hot plates 3 and 8 via 3a, 3b, 8a, and 8b to preheat the hot plates and the mold. Thereafter, the hot plate and mold assembly is placed on cart A and transported to the front of the vulcanizer. At this time, the arm 17 of the truck A is housed in a portion 17a between the roller groups 16 on the truck shown in FIG. Same trolley A
The vulcanizer is stopped at a substantially fixed position by using a line drawn on the floor as a guide or by a known method such as a centering pin (not shown). Next, the arm 17 is pushed out toward the vulcanizer manually or by a cylinder mechanism or the like. Then, roller group 2
0, the hot plate and mold assembly are transferred onto the base 1 together with the arm 17, and the block 1 of the base 1 is
a and the wedge 3e of the lower heating plate 3, the heating plate and mold assembly are positioned on the base 1. At this time, even if the stop position of the cart is inaccurate, the hot plate and mold assembly move back and forth on the arm 17 due to the guiding function of the ball bearing 19, block 1a, and wedge 3e.
It moves freely in the left and right direction and is correctly positioned on the base 1. Next, the rod of the cylinder 10 is extended upward, and after supporting the hot plate and mold assembly on the upper surface of the clamp fitting 10a via the upper collar 3c, the arm 17 is moved onto the trolley. Move back to side A. The rod of cylinder 10 can now be retracted. Then, the hot plate and mold assembly will be
The center hole of the lower hot plate 3 or the lower mold 4 is installed on the base 1 while being guided by the register ring 2. At this time, the rod of the cylinder 10 rotates approximately 90 degrees near the retreating position, and the clamp fitting 10a is rotated to the first position.
As shown in the left half of the figure, firmly grasp the lower collar 3d of the lower heating plate 3. Next, the quick joints 11a, 11
b, 12a, and 12b connect each hot plate piping to complete the work. Further, the attachment of the upper hot plate 8 to the bolster 7 can be easily achieved by bolt attachment as described above or by employing the same method as the cylinder 10. Also, when removing the mold,
Do the same procedure but in the reverse order.

The method for replacing the mold of the tire vulcanizer of the present invention involves assembling the mold and the hot plate as described above, then transporting the mold to the vulcanizer, and attaching the hot plate to the vulcanizer. Only additional machining is required for positioning and clamping fittings, and there is no need to modify a wide variety of existing molds. This saves labor in positioning and removing molds from the vulcanizer.
Automation can be easily achieved. Furthermore, the mold can be preheated outside the vulcanizer without adding any special equipment, which has the effect of improving the operating rate of the vulcanizer.

In addition, the arm on the side of trolley A that has a ball bearing,
The positioning wedge on the base of the lower hot plate greatly facilitates the insertion and removal of the base of the hot plate and mold assembly. In this respect, conventionally, two people were required: an operator of the forklift, etc., and a worker to check the position, but the number of workers can be reduced by one, and the automatic drive/control device of the cart A-arm 17 or the cylinder, etc. Unmanned operation is also possible by adding an automatic quick-joint attachment/detachment mechanism. Further, the mold changing device can be shared by a plurality of vulcanizers. Further, the clamping cylinder 10 has the function of raising and lowering the hot plate and the mold assembly on the base, but the clamping function and the raising and lowering function may be provided by separate cylinders. Furthermore, although the cylinder 10 is normally operated by liquid, clamping force is required only when the vulcanizer is opened and closed, which generates the force that moves the mold, and liquid pressure is supplied only at this time. Energy savings can be achieved by controlling the hydraulic pressure source to be turned off. In addition, in the case of the so-called dome type, which surrounds the mold and heats it directly with steam,
You can use a dummy plate instead of a hot plate.
In that case as well, the same effects as described above can be achieved.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of drawings]

Figure 1 shows the state of the mold changing device used to carry out the mold changing method for a tire vulcanizer according to the present invention after the mold is installed (left half) and the state when the mold is carried in (right half) FIG. 2 is a plan view, and FIG. 3 is a side view. 4, 6... Mold, 3, 8... Hot plate.

Claims (1)

[Claims] 1. Assemble a mold and a hot plate that heats the mold in advance, supply a heating medium to the hot plate at an appropriate position outside the vulcanizer to preheat the mold and hot plate, and then heat the mold and the hot plate. A mold replacement method for a tire vulcanizer, characterized in that the mold is replaced by assembling the hot plate as one piece into the vulcanizer.