KR800001657B1 - Lock type press - Google Patents

Abstract

A tyre-curing press(1) is formed by two annular mould support plates(3), one of which is fixed while the other is movable vertically to open and close it. An annular lock ring(23) surrounds the two plates when the press is closed. It sets an internal flange at one end which engages with a flange on the fixed plate. At its other end it sets a breech lock which locks the ring in position when the press is closed and the ring is rotated. The ring rocks the press against the high forces due to curing pressure, and also as a heat shield.

Description

Vulcanizer Closing Device

1 is a front view of a vulcanizer illustrating a closing device constituting the present invention.

FIG. 2 is a side view of the vulcanizer of FIG. 1, taken along line 2-2 of FIG.

3 is a radially enlarged cross-sectional view of a vulcanizer in a closed position for simultaneously closing the molding and curing molding of the tire carcass located in the molding space formed by the upper mold.

4 is a partial top view taken along line 4-4 of FIG. 1, showing the vulcanizer closure device in a closed position capable of vertical motion of engaging and separating the upper mold with the lower mold. In doing so.

FIG. 5 is similar to FIG. 4, but shows that the vulcanizer closure is located in the closed position for closing the moldings at the same time in the vulcanized position.

FIG. 6 is a cross-sectional view taken along the line 6-6 of FIG. 5 showing the occlusal state of the closed ring and the surface of the helical protrusion of the upper support.

FIG. 7 is a radial cross sectional view showing a carcass loading mechanism for positioning an uncured tire carcass on a lower die. FIG.

The present invention relates to a closing device of a tire vulcanizer.

Previously, toggles such as large gear cranks and large structural members, including beams and maces, to resist shear loads due to high drift and high hardening pressure in the tires in the forming section. The apparatus has been widely used in the field of vulcanization technology.

In addition, total seating has been proposed in the use of a closing mechanism, in which considerable force is applied to obtain the desired preloading, which, of course, is a strong and large size necessary for preloading closing of the upper and lower parts in the closing position of the molding machine. High pressure active contact with the final application of torque loads subject to pressure of the components of the structure is included.

Contrary to the known construction, the vulcanizer closure device of the present invention only requires a closure ring, which, when in the molding machine closure device, surrounds the upper and lower parts, and vulcanizes the pressure to close the upper and lower parts in the closed position. And the elastic modulus and cross section of the protruding surface and the enemy of the tire carcass, but the elastic stretching of the closing ring allows the upper and lower parts to be separated within the flash limits calculated in advance during the vulcanization operation. The closure ring is acted in and out of the closed position by a minimum torque load giving only the effect of engaging the closing surface without preloading the closure ring.

The main purpose of the present invention is to have an annular surface in which the lower end of the closing ring and the lower die supporting member are radially overlapped, and the upper end and the upper die supporting member of the closing ring have a spirally overlapping spiral surface. The tire is closed in the closed position by rotation of the closing ring to occlude the radially overlapping annular surface and the radially overlapping annular surface and the radially overlapping spiral surface so that the tire is hard-molded in the closed molded part. When applying vulcanization pressure in the carcass, it is not separated from the upper and lower parts, and the ratio of the modulus of elasticity and the cross-sectional area of the closing ring is intended to provide a vulcanizer closing device having the characteristic that under such vulcanization pressure it is only stretched within the allowable flash limit. will be.

Another object is to provide a vulcanizer which does not need medium large gears, beams and bases in closing the molded parts simultaneously.

Another object is to provide a vulcanizer which requires minimal energy for sealing and closing.

Yet another object is to provide a vulcanizer having a substructure for supporting bed loading and vulcanizer support.

Other objects and advantages of the present invention will be described below with reference to the accompanying drawings.

Although the vulcanizer or curing pressurizer 1 is a double space type, it will be appreciated that the principles of the present invention are equally applicable to a single space pressurizer.

The pressurizer 1 shown in the figure is composed of a base structure 2, which is fixed to a set of molding machine support plates or members 3 supporting the lower die 4, respectively. Moreover, on the said lower member, there exists an intervening heating plate 5 through which the heating fluid circulated by a well-known method passes. In each lower mold support plate 3 and the lower mold part 4, an air bladder assembly 6 and an operation cylinder 7 for operating the air bladder assembly 6 as described later are disposed.

At the opposite end of the base structure 2 there is a tubular column 8 supporting the upper horizontal frame member 9 with rails 10 for horizontal movement of the carriage member 11 with a plurality of rolls 12 engaged with the roll 10. The roll 12 of is driven by the electric driver 14. The front ends of the frame member 9 are inclined discharge conveyors 16 suitable for discharging the cured tire T from the top when the upper part 17 is in the raised position and the carriage 11 is operated in the forward dashed position shown in FIG. It is supported by a diagonal frame member 15 installed between them.

At the front end, perpendicularly arranged to the carriage 11 consists of heat dissipation, and when the lower mold 17 is in the closed position of the molding machine, it operates the cylinder 22 to the upper position of the closing ring 23 surrounding each upper and lower mold 17. When the uncured carcass T is lifted from the transporter 21, it is operated by a cylinder 20 suitable for mounting underneath the upper bead of the carcass T. With a set of carcass loading assemblies 18.

Further, it is a set of upper plate support plates or members 24 fixed to each other in the vertical direction of the carriage 11, where each upper plate 17 is fixed to an intervening heating plate 25 suitable for circulating through the heating fluid. Each upper support plate 24 has a tubular rod 26 that extends upwardly in the direction of the active center in the sleeve 27 in the side beam 28 of the carriage 11, the upper end of the rod 26 being secured to the side beam 28. Abutment to each transverse arm 29 of the piston cylinder assembly 30. Each rod is a hollow body, and at its lower end there is a non-loading mechanism 31 which is operated by a cylinder 32 which is operated in a known manner to allow the tire T secured from the lower mold 4 to be peeled off. The cylinder 34 is operated in a known manner to allow the upward movement of the upper portion 17 relative to the mechanism 31 for detaching the upper portion 17 from the hardened tire T.

When the upper die 17 is in the raised forward position, the loader 18 is arranged on the coaxial line of the lower die 4, thereby lowering the uncured tire carcass conveyed to the loader, so that the lower toe ring is around 35 By mounting the lower bead on the carcass T, the bladder assembly 6 can be operated in a known manner to sequentially insert the bladder into the tire carcass T, wherein the loading finger 19 is operated radially inward to As shown in FIG. 7, the tire carcass T can be demolded at the center position of the lower four phases.

In this way, the tire carcass loaded on the lower die 4 and supported by the air sacs inside 2 can move the carriage 11 forward to position the respective upper die 17 on the isometric line above the downward die 4. 30 lowers the upper portion 17. At the same time (or later) the loader 18 can be moved downwards to the finger 19 at their radially inner position to stretch in the next set of upper beads of the tire carcass T.

As shown in Fig. 4, the protrusions 39 extending inward in the radial direction of the support member 24 when the upper and lower dies 17 and 4 are engaged as shown in Fig. 3 by the mating stators 37-38 are shown in Fig. 4. It will pass downward between the spaces between the closed ring protrusions 40 extending radially inwardly. Each closure ring 23 contains a heat dissipating material, in a double space pressurizer a single piston cylinder assembly 41 is used to rotate the closure ring 23 in the opposite direction, the helical surfaces 42 and 43 of the closure ring and the upper support member projections 39 and 40 intersections can be performed. In the practice of the present invention, as shown in FIG. 1, the closing ring 23 on the right side rotates in the direction shown in FIG. 4 to the closed position of FIG. 5, so that the helical surfaces 42 and 43 are on the left side, thus The closing ring 23 on the left rotates in the direction of the reverse closure state to the closed position, so the spiral surfaces 42 and 43 are on the right. Since the helix angel of the surfaces 42 and 43 of the protrusions 39 and 40 is below the friction angle, there is no torque to rotate the closing ring 23 to the closed position during vulcanization. For steel protrusions 39 and 40, the helix angle would be about 7 °.

In order to reduce the rotational force of the closing ring 23 between the closed position and the unclosed position, they are supported by the roller 45 and held coaxially by the circumferential roller 46. The annular surfaces of the edges 47 and 48 are very close together, and the magnitude of the fluid pressure in the cylinder 41 allows the surface of the edges 47 and 48 to make metal-to-metal contact with a slight gap at the beginning, and preliminary closing of the ring. It shall be for engaging the helical surfaces 42 and 43 of the projections 40 and 39 without loading. The size of the cross section and the material of the angular closure ring are each closed ring within one thousandth of an inch within the flash tolerance by the vulcanizing pressure enemy to separate the protrusion area of the tire T from the top and bottom portions 17 and 4 during vulcanization. Elastic stretching is selected to occur.

When the tire carcass T cures in the molding machine space, the vulcanized fluid pressure is pulled to remove the pressure between the mated helical surfaces 42 and 43 and the mating edges 47 and 48 so that the cylinder is moved to the unclosed position in low pressure operation. Rotating the closing ring 23, wherein the protrusion 39 of the support member 24 is disposed between the closing ring protrusion 40 as shown in FIG.

Once the vulcanizing fluid pressure is removed, the cylinder 32 is activated to press down the frontal head of each bladder and radially outward the segment of the non-loader 31 as shown by the dashed line in FIG. At this time, the upper die 17 may move vertically to demold the upper die from the upper half of the cured tire T.

When the upper portion 17 is moved upward, the bladder assembly 6 is operated in a known manner to detach the bladder 36 from the cured tire T as shown by the dotted line in FIG. 3, with the continuous upward movement of the support member 34. This causes the segment of the non-loader 31 to be mounted under the upper bead of the tire T so that the tire T is detached from the lower mold 4 and they are moved upwards over the closing ring 23. At this time, the carriage driver 14 is driven to move the upper portion 17 forward to the chain line shown in FIG. 2. In this position, the fluid driver 32 moves the segment of the non-loader 31 so that the cured tire T is lowered on the discharge conveyor 16. Driven to pull inward in the radial direction, the cured tires roll off from the conveyor upon operation of the stop finger 49.

In the curing operation, the curing pressure acting on the protruding surface of each tire T and the protruding surface of each bladder head assembly attempts to lift the upper upper portion 17 and its support 24, so that the upward pressure by the support member 24 is applied to the closing ring protrusion 40. Act to give each closing ring 23 a tensile load. However, as mentioned above, the modulus of elasticity of the material constituting the closing ring 23 and its cross section must be such that the elastic elongation is at a minimum amount of a few thousandths of an inch within the flash tolerance. For example, the stretching in the closing ring for truck tire vulcanizers is between 0.005 inches and 0.008 inches. Since each closing ring 23 has an insulating material 50 covered by a plate-shaped metal ring 351, it constitutes a heat dissipating material, and because of the installation of the upper conical part, each closing ring 23 is subjected to the upward pressure acted by the protrusion 39 of the upper supporting member member 24. Thereby strengthening against the upward and outward tilt of the protrusion 40.

Although the description of the figures and specification above relates to a plate pressurizer, it is understood that the present invention can be applied to a steam dome type pressurizer with substantially the same effect.

Claims (1)

At the time of occlusion, the tire carcass is molded and cured by curing the medium under pressure in the carcass, and during vertical separation, the cured tire is removed therebetween and the uncured carcass can be interposed therebetween. In a tire vulcanizer having a relatively upper and lower molds separated from each other and a device for relatively mating and detaching the upper and lower molds, at the time of occlusal, the upper and lower molds are rotated and one end of the upper and lower molds is rotated and fixed in one axial direction. The other end is closed in the circumferential direction from the projection corresponding to the other forming part according to its rotational position and is located at a certain distance in the connected polar direction. When closing in the circumferential direction, vertical separation of the upper and lower mold parts is possible. In case of joining, the upper half and the lower half of the occlusion are held in half during occlusion. Closing rings with a series of projections superimposed in a direction and for engaging the helical surface without substantially dropping the closure rings substantially in the axial direction, by applying a curing medium pressure in the tire carcass in the forming space during occlusion. A vulcanizer consisting of a rotating device of a closed ring having an elastic modulus, a cross-sectional size and an elongation, which allow the closing ring to hold the upper and lower dies within a maximum measured flash limit in advance to cause elastic elongation. Closure

Images