SU1402433A1 - Injection-mould for vulcanizing covers of pneumatic tyres - Google Patents

Abstract

The invention relates to equipment for tire industry and can be used to form and vulcanize poppies of pneumatic tires. The purpose of the invention is to increase the reliability of the mold in operation. For this, the mobile sectors 3 are connected to the upper part with the upper half-form 1 with the fingers .4. The fingers are located in the radial na

Description

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5. Sectors 3 are connected by means of profile bars 6 with an axially movable locking ring 7. The profile bars 6 are articulated with their lower ends on the locking ring. They have surfaces on both sides with cylindrical a and conic b sections for interaction with the inner surface of the closure ring and, with the outer surface of the sectors.

The angle of inclination of the conical section of the closure ring to the vertical Noy of the perss-shaped axis by the shape of the conical section of the locking ring is greater than the angle of inclination of the outer surface of the sectors. When the locking ring is lowered, the sectors with core bars first rotate around the fingers and hinges, and then move radially and form the molding surface. 5 il.

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The invention relates to equipment for the tire industry and can be used to form and vulcanize poker tires of pneumatic tires.

The purpose of the invention is to increase the reliability of the mold in operation.

Fig. 1 shows a mold in the open position} in Fig. 2 - the same at the beginning of the flattening of the sectors; on Figure 3 - section A-A in FIG. 2; figure 4 - the mold in the closed position; Fig O5 - section BB on

The mold contains a movable upper 1 and a fixed lower 2 half-form, radially movable sectors 3, which by their upper part are connected to the upper half-form 1 by means of fingers 4, spread out in radial grooves 5. Sectors 3 are connected by means of profiled bars 6c I of an axially movable locking ring: 7, the profile strips 6 are fastened with lower ends on the locking ring 7 on the hinges 8 with the possibility of rotation in the radial plane of the mold. The locking ring 7 has cylindrical a and conic b sections on the inner surface. Profile bars 6 have a T-shaped cross section and enter with gaps d into T-shaped grooves 9 made in sectors 3. Working surfaces of core bars 6 have cylindrical and conical sections, the outer surfaces of which interact with the corresponding inner surfaces - the locking ring 7, and the inner surfaces - with the outer surface of the sectors 3, and the angle of inclination of the

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The lower part of the locking ring 7 to the vertical axis of the mold was chosen to be greater than the angle of inclination of the outer surface of the sectors 3.

The mold works as follows.

The tire blank is installed on the lower half-form 2. The plate of the format-vulcanizer with the upper half-form 1 fixed on it with the possibility of axial movement, a rigidly fixed locking ring 7 connected by means of the profile bars 6 with sectors 3, begins to descend. plus Г mm from the bottom half of form 2, top half of form 1 stops (the stop is provided by the kinematic scheme of the vulcanization equipment). In this position, sectors 3 are maximally separated, and a space is formed between the outer conical surface b of the axle and the locking ring 7 (see FIG. 1). Upon further lowering of the research institute of the locking ring 7, the profile strips 6, resting on the upper mold half 1, together with the sectors 3, rotate around the axes of the hinges 8 until the surfaces a and b adjoin the cylinder and the cone of the locking ring 7, while the sectors 3 rotate around the axes of the hinges 4, then the ends. sectors 3 occupy a position parallel to the end surface of the lower half-molds.

In this position, the sectors 3 are separated, there is a gap-forming surface of the sectors 3 and there is a gap in the tire blank, besides the gap 9 is between sectors 3

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and locking ring 7 (see figure 2). Upon further lowering of the faceplate of the format-vulcanizer with a locking ring 7, the sectors 3 begin to move relative to the locking ring 7 and the profile bars 6 fixed on it in the slots 5. The profile bars 6 act radially on the sectors 3 along the plane

c T-shaped grooves 9. The contact between the locking ring 7 and the sectors 3 is made through the profile strips 6 along the q plane, which ensures low contact voltages. With further movement of sectors 3 and lowering the locking ring 7, the gap

0 between the locking ring 5 and the sectors 3 will decrease, as the profile bars 6 and the T-shaped grooves 9 in the sectors 3 are inclined to the vertical axis of the mold at an angle

oL, less than the angle / 3, formed between the vertical axis of the mold and. generatrix of the conical surface-25 kryggek pneumatic tires, the content of the locking ring, due to the movable upper and fixed lower the design of the profile bar 6, nude half-form, radially movable

the sectors pivotally connected to the upper half-form by means of fingers,

This decreases, and the gap between the profile hulls 6 and the Cf plane of the T-shaped grooves 9 increases. In the closed position of the mold, sectors 3 are maximally flattened and form with the upper half-form 1 and lower half-form 2 a toroidal surface, s of which the tire blank is molded and vulcanized. After vulcanization, the mold is opened with the sequence, the inverse of the closure and the vulcanized poker is removed. Improving the reliability of the mold 15 in the work is achieved by replacing the main part of the translational movement of the profile bars 6 and sectors 3 with a rotational one, which reduces the contact time of brittle surfaces and their wear.

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Claims (1)

Formula Invention, Shadow Mold For Vulcanization Po30 35 The angle ot of inclination of the conical surface of the sectors 3 is equal to the angle c / inclination of the inner conical surface of the profile bars 6 to the mold axis, i.e. less than the angle jb of inclination of the outer conical surface of the profile bars 6, and accordingly, the angle j3 of inclination of the cone of the locking ring to the axis of the mold. The magnitude of the angle difference p-ot is determined by the tire size and the required progress of the sectors. At the end of the displacement of the sectors 3 (see FIG. 3), the locking ring 7 contacts its conical surface with the surface of the sectors 3, finally the shear and the locking of the latter. Since the movement of sectors 3 on installed in the grooves of the latter, and connected by means of guides to an axially movable locking ring having an internal surface with cylindrical and conical sections, characterized in that, in order to increase the reliability of the mold in operation, the grooves of the upper half of the mold are made radial, and guides of the locking ring are made in the form of profile bars hinged by the lower ends on the locking ring with the possibility of rotation in the radial plane of the mold and having on both sides This stage occurs along a conical surface g with cylindrical surfaces and horses of the closure ring 7, which is inclined at an angle R greater than the angle of inclination of the inner conical surface of the profile bars 6 to the vertical axis of the mold, the profile bars 6 move relative to the sectors 3 in the radial direction. 6t clearance at 50 sections for interacting with the inner surface of the closure ring and with the outer surface of the sectors, moreover, the angle of inclination of the outer surface of the sectors was chosen for the conical section of the locking ring to the vertical axis of the mold 0 This decreases, and the gap between the profile hulls 6 and the Cf plane of the T-shaped grooves 9 increases. In the closed position of the mold, sectors 3 are maximally flattened and form with the upper half-form 1 and lower half-form 2 a toroidal surface, s of which the tire blank is molded and vulcanized. After vulcanization, the mold is opened with the sequence, the inverse of the closure and the vulcanized poker is removed. Improving the reliability of the mold 5 in operation is achieved by replacing the main part of the translational motion of the profile bars 6 and sectors 3 with a rotational one, which reduces the contact time of brittle surfaces and their wear. 0 pneumatic tires krzhegk, containing a movable upper and fixed lower half-form, radially movable Formula Invention, Shadow Mold For Vulcanization by installed in the grooves of the latter, and connected by means of guides to an axially movable locking ring having an inner surface with cyindric and conical sections, characterized in that, in order to increase the reliability of the mold in operation, the grooves of the upper half of the mold are made radial, and the guides of the locking ring are made in the form of profile bars hinged by the lower ends on the locking ring with the possibility of turning in the radial plane of the press-form and having workers on both sides g surfaces with cylindrical and horses 50 sections for interacting with the inner surface of the closure ring and with the outer surface of the sectors, moreover, the angle of inclination of the outer surface of the sectors was chosen for the conical section of the locking ring to the vertical axis of the mold FIG. (rig 5