SK501302013U1 - Container for segment vulcanization molds with spring mechanism - Google Patents

Abstract

The container comprises a spacer ring (11) associated with the upper outer plate of the upper ram of the press to which a conical ring (12) with a guide (13) is associated. The two rings (11, 12) are movably connected by a spring mechanism (10).

Description

The technical solution relates to a container of segment vulcanization molds with a spring mechanism for the production of tires, where the spring mechanism prevents damage and deformations of the container top plate and other parts and components and seizure of the upper functional surfaces of the segment carriers.

BACKGROUND OF THE INVENTION

Tires are vulcanized in presses fitted with vulcanizing containers of segment construction (Fig. 1). A segmented vulcanization mold 50, which consists of an upper semi-mold and a lower semi-mold, is inserted and fixed into the vulcanization container. These semi-molds with a tire tread are retained in individual parts of the container. The container is mounted between the upper ram of the press and the lower press plate. The upper half-form of the vulcanization mold is attached to the upper ram of the press, the lower half-form of the vulcanization mold is attached to the lower plate of the press. The upper ram of the press is divided into two bases - an upper outer plate 60 (circle) and an upper inner plate 70 (circle), the two plates moving independently of each other. A spacer ring 11 is fixedly attached to the upper outer plate 60, below which a conical ring 12 is placed in the mechanical contact (these two rings can be designed as one part, which is then called a conical ring) depending on the type of container. A conical ring 13 with a stop is connected to the conical ring 12. The container carriers 21 with the vulcanization mold segments 51 are slidably connected to the guide element 13.

An upper plate 41 of the container is attached to the upper inner plate 70 of the press ram, to which parts of the upper half-mold of the vulcanization mold are attached, namely the upper side ring 52, to which the upper heel ring 53 is attached. The lower semi-mold of the vulcanization mold 50 consists of a lower side ring 54 with a lower heel ring 55, which are fixed to the lower plate 31 of the container 100.

The carriers 21 of the vulcanization container 100 and the vulcanization mold segments 51 fixed therein are displaceably mounted relative to one another by means of a T-shaped groove 24 and a T-shaped guide element 13 with a stop and thereby slidably connected to the conical ring 12.

This arrangement allows the vertical movement of the conical ring 12 of the vulcanization container 100 to be transformed into a radial movement of the carriers 21 and the tire tread segments 51 mounted therein when the vulcanization container is closed.

The container carriers 21 and the vulcanization mold segments 51 mounted therein are simultaneously displaceably mounted in the upper plate 41 of the container by means of a T-shaped upper guide member 23. This fit allows radial horizontal movement of the carriers 21 towards the center of the vulcanization container. When closing the container, the carriers 21 and the mold segments 52 fixed therein are displaced along the cone of the conical ring 12. This process is made possible by dividing the upper ram of the press into separate inner and outer plates (ring) as described above. The possibility of mutual movement of the inner and outer plates of the press ram ensures the opening of the vulcanization mold, the closing of the mold and the creation of a constant pressure (prestressing) of the mold in the closed state, so-called. The vulcanization container is closed when the vulcanization mold segments 51 have fully contacted the upper side circle 52 and the lower side circle 54 of the vulcanization mold. The bias P is constructed by offsetting the spacer ring 11 against the top plate 41 of the container by 0.4 mm -1 mm as shown in FIG. 2. This enforcement may vary according to the specifications of the tire manufacturer. When the vulcanization container (Fig. 1) is closed by a vulcanization press, the outer and inner plates of the press ram do not come into contact. Since the container carriers 21 and the mold segments 51 fixed therein are closed by sliding the cone of the vulcanizing container, the cone of the vulcanizing container must be offset relative to the upper semi-mold. This offset of the conical ring against the upper plate is measured when the vulcanizing container is assembled under a pressure load replacing the closing force of the press, so that when the press is closed when the outer ram and inner ram plates are in the end position, ) forces through the cone of the vulcanization container. These forces cause a constant closure of the vulcanization container, which is necessary for the quality of the tire vulcanization. These are counteracted by the pressurizing forces of the pressure medium in the membrane of the vulcanizing mold, which expels the raw casing in the mold cavity for tire molding. If the closing forces were overcome by the molding (compression) forces of the membrane, the vulcanization container and the mold would open. The opening of the container and the tire mold causes the mixture to enter between the mold segments 51, between the upper side ring 52 and the lower side ring 54, resulting in visible flow on the tire. The set bias on the vulcanization container ensures that the vulcanization container is always closed. The existing design of vulcanizing containers with different suspension of the conical ring 12 of the container and the top plate 41 of the container (Fig. 2) causes the top plate 41 of the container to deform due to the compressive action of the forming forces of the membrane in the vertical direction. This contributes to seizing the functional surfaces of the upper T guide member 23 and the carriers 21 of the segments 51 sliding along the deformed upper plate 4.1. This leads to a gradual deformation of the individual parts of the segment vulcanization container, which are transferred to the segments of the vulcanization mold, which also causes defects on the molded tires. There is also local seizure and deformation because the container parts and the mold are closed without the possibility of defining clearance between the parts. For the above reasons, the segment vulcanization containers need to be repaired after some time. For repair, the segmented container and molds must be taken out of service for several weeks.

The essence of the technical solution

The disadvantages of the known containers are largely eliminated by the container for segmented vulcanization molds with a spring mechanism according to the invention. The container comprises a spacer ring to which a conical ring is associated, a conical ring associated with a guide element which is slidably connected to the carriers and segments of the vulcanization mold. The spacer ring is assigned to the upper outer plate of the upper ram of the press. The essence of the technical solution is that the spacer ring and the conical ring are movably connected by a spring mechanism.

According to a preferred embodiment of the invention, the spring mechanism consists of a pin which is fixedly mounted under a first recess formed in a conical ring. This pin is guided from the conical ring into a second recess which is formed in the spacer ring, the pin being guided into the spacer ring through an opening formed in the spacer ring. In the first recess, springs are mounted on the pin, which are supported on one side by the vertical side of the first recess and on the other side by the first washer, which is supported by the other side on the underside of the spacer ring. In the second recess, a second washer is mounted on the pin, which is in contact with the horizontal side of the second recess. Two fixing nuts are mounted on the pin above the second washer. A conical ring is formed on the conical circle, which fits the shoulder formed on the spacer ring.

An advantage of the technical solution is that the springs housed in the first recess between the spacer ring and the conical ring provide a preload adjustment which ensures the permanent closure of the vulcanization mold and serves to overcome the pressure load caused by the membrane pressure. The location of the springs removes and eliminates the mechanical contact between the segments of the segment vulcanization container, and at the same time, thanks to the lift of the springs, allows all parts of the container and the mold to be closed when closing. Compressing the spring mechanism automatically compensates for inaccuracies and clearances of the individual parts of the vulcanization container. This arrangement significantly reduces the possible mechanical damage to the individual parts of the vulcanization container. The use of spring mechanisms reduces maintenance costs and costs, extends the life cycle of the segment cure container, avoids deformations of the container top plate, and seizes functional surfaces of the segment carriers.

BRIEF DESCRIPTION OF THE DRAWINGS

The technical solution is illustrated in more detail by means of figures, where: FIG. 1 illustrates a prior art vulcanizing container arrangement according to the prior art:

Fig. 2 shows the adjustment of the design bias by offsetting the conical ring against the top plate of the prior art container:

Fig. 3 shows an arrangement of a vulcanizing container with a spring mechanism according to the invention;

Fig. 4 shows the preload adjustment of the spring mechanism in the open container condition;

Fig. 5 shows the preload adjustment of the spring mechanism when the container is closed;

Fig. 6 is a top view of the container with the spring mechanisms spaced around the periphery of the container;

Fig. 7 shows the action of forces within the vulcanizing container in the manufacture of a tire.

Example

The segment construction container 100 (hereinafter referred to as the container) for tire molding of FIG. 3 is anchored between the upper ram of the press and the lower ram of the press. The upper ram of the press is divided into two bases - an upper outer plate 60 (in the form of a circle) and an upper inner plate 70 (in the form of a circle), the two plates moving independently of each other. In the container 100, a segmented vulcanization mold 50 (hereinafter the mold) with a tire tread is inserted and fixed. This mold 50 consists of an upper half-form and a lower half-form, wherein the upper half-form is connected to the upper ram of the press, the lower half-form is connected to the lower ram of the press. A spacer ring 11, which is movably connected to the conical ring 12 by a spring mechanism 10, is fixedly fixed to the upper outer plate 60. A T-shaped guide element 13 with a stop is attached to the conical ring 12. The guide element 13 is slidably connected to the container carriers 21 which are rigidly connected to the segments 51 of the mold 50.

An upper plate 41 of the container is attached to the upper inner plate 70 of the press ram, to which parts of the upper half-mold of the vulcanization mold 50 are attached, namely the upper side ring 52, to which the upper base ring 53 is attached. container carriers 51. The lower half-form of the mold 50 consists of a lower side ring 54 and a lower heel ring 55, these rings being fixed to the lower plate 31 of the container 100. The lower plate 3.1 is attached to the lower ram of the press, not shown.

At the same time, the container carriers 21 and the segments 51 of the vulcanization mold 50 mounted thereon are displaceably mounted in the upper plate 41 of the container by means of a T-shaped upper guide member 23. This arrangement allows radial horizontal movement of the container carriers 21 towards the center of the container. Upon closing (opening) of the container 100, the carriers 21 and the segments 50 of the mold 50 fixed therein are displaced along the cone of the conical ring 12. This process is made possible by dividing the upper ram of the press into a separate outer plate 60 and inner plate 70 as described above.

The possibility of the relative movement of the outer plate 60 and the inner plate 70 of the upper ram of the press ensures the opening of the vulcanization mold, the closing of the vulcanization mold 50 and the creation of a constant pressure of the mold 50 in the closed state, so called. pretension. Since the vulcanization container 100 is closed when the segments 51 of the vulcanization mold 50 have fully contacted the upper side ring 52 and the lower side ring 54 of the vulcanization mold 50, it is necessary to create a bias which is created by the spring mechanism W.

The spring mechanism 10 (FIG. 3,4,5) consists of a pin 10.1 which is fixedly mounted under the first recess 10.2 formed in the conical ring 12.

This pin 10.1 extends from the conical ring 12 into the second recess 10.3. The pin 10.1 is guided into the spacer ring 12 via an aperture 10.4 formed in the spacer ring 11. In the first recess 10.2 there are springs 10.5 mounted on the pin 10.1, which bear on one side against the vertical side 10.21 of the first The recesses 10.2 and the second side are supported by a first washer 10.6, which is supported by the other side on the underside 11.2 of the spacer ring 11. In the second recess 10.3, a second washer 10.7 is mounted on pin 10.1 which contacts the horizontal side 10.31 of this second recess 10.3 . Above the second washer 10.7, two fixing nuts 10.8 are mounted on the pin 10.1. A conical ring 12.1 is formed on the conical ring 12, in which the shoulder 11.1 formed on the spacer ring 11 is formed. FIG. 6 shows a top view of the distribution of the spring mechanisms 10 along the circumference of the container. The number of spring mechanisms is determined by the size of the vulcanization container.

The resilient connection by means of a spring mechanism 10 between the spacer ring 11 and the conical ring 12 allows them to move relative to one another while at the same time guaranteeing a firm attachment of the spacer ring 11 to the conical ring 12 of the container. The springs 10.5 inserted between the spacer ring 11 and the conical ring 12 ensure the biasing between the functional parts of the container and the vulcanization mold. This arrangement ensures the permanent closing of the vulcanization mold and serves to overcome the pressure load caused by the pressure of the mold membrane. The springs 10.5 remove and eliminate mechanical contact between the segments of the segmented vulcanization container, and at the same time, thanks to the lift of the springs, it is possible to define the container parts and the molds at closing.

Fig. 4 shows the container before closing. The spring mechanism 10 is not compressed by the pressure action of the outer plate 60 of the upper ram of the press, the container being in the closing phase. Due to the arrangement of the springs 10.5, these springs are not compressed, and between the spacer ring 11 and the conical ring 12 there is a clearance indicated by the letter B. This clearance is referred to as the container lift.

Fig. 5 shows the container in a closed state. The compressed springs 10.5 create a bias and a pressure which is transmitted through the cone of the conical ring 12 to the carriers 21 and the segments 51 of the mold 50. The value of the compressive force created by the spring mechanism 10 is given by the number of springs 10.5, their shape and the value B. fig.1) the springs are compressed, the value of B - container lift is minimal. Size of compression force exerted by springs 10.5. i.e. the bias can be adjusted by adjusting the stroke by means of the nuts 10.8 and thereby reducing or reducing the bias. by increasing the B value, i.e. container lift. When the container is closed by the spring mechanism 10, the pressure action of the press on the carriers 21 of the vulcanization mold is gradually increased.

The force arrangement in the manufacture of the tire is shown schematically in FIG. 7 where:

Fuz - is the curing force of the curing press acting through the cone of the curing container;

FUB - is the closing force of the curing press acting through the upper half-form; Fuc - is the force of the lower plate of the press acting on the lower half-form;

Pmem - is the pressure of the pressure medium in the mold membrane;

Fmb - is the membrane force of the curing press acting on the sides of the curing container;

FMO - is the membrane force acting in the radial direction;

FMK - is a component of the FMO force acting in the vertical direction against the closing of the vulcanizing press.

Claims (2)

A container (100) of segmented vulcanization molds with a spring mechanism, wherein the container comprises a spacer ring (11) to which a conical ring (12) is associated, a conical ring (12) is associated with a guide element (13) slidably connected with carriers (21) and segments (51) of the vulcanization mold, wherein the spacer ring (11) is associated with the upper outer plate of the upper ram of the press, characterized in that the spacer ring (11) and the conical ring (12) are movably connected by a spring mechanism ( 10). Container according to claim 1, characterized in that the spring mechanism (10) consists of a pin (10.1) fixedly mounted under the first recess (10.2) formed in the conical ring (12), the pin (10.1) being of a conical ring (10.1). 12) led into a second recess (10.3) formed in the spacer ring (11), the pin (10.1) being guided into the spacer ring (1.2) through an opening (10.4) formed in the spacer ring (11), in the first recess (10) is supported on the pin (10.1) by springs (10.5) which are supported on one side by the vertical side (10.21) of the first recess (10.2) and by the other side on the first washer (10.6); (10.6) is supported by the other side on the underside (11.2) of the spacer ring (11), in the second recess (10.3) a second washer (10.7) is mounted on the pin (10.1) which is in contact with the horizontal side (10.31) recesses (10.3), above the second washer (10.7) are located on the pin (10.1) Two fixing nuts (10.8) are formed, on the conical ring (12) is formed a plug (12.1), which fits the shoulder (11.1) formed on the spacer ring (1.1).