A steel sheet for a tire relief mold pattern block parting surface

Abstract

The utility model discloses a steel sheet for tire live die pattern block parting surface, steel sheet is located between two pattern muscle on the pattern block, steel sheet is cut into two parts by parting surface, the shape after the butt joint of two parts is the shape formed after the first trapezoidal upper portion removes the second trapezoid, the side of second trapezoid is parallel with the pattern muscle side, and the distance from the side of second trapezoid to the pattern muscle side satisfies w1<=10t, the distance from the bottom of second trapezoid to the surface of pattern block satisfies w2<=10t, t<=1.2mm, t is the thickness of steel sheet, and the junction of first trapezoid and second trapezoid is transitioned through the arc. The steel sheet for tire live die pattern block parting surface disclosed by the utility model has the advantages of high strength, not easy to bend, fall off and break, easy demoulding and avoiding damaging tire tread when demoulding.

Description

Technical Field

[0001] This utility model belongs to the field of tire sliding molds and steel sheets, specifically relating to a steel sheet used for the parting surface of the tread block in a tire sliding mold. Background Technology

[0002] Tire treads have many grooves of varying widths. The narrower grooves are molded using steel strips set on the tread blocks of the tire mold. The shape and size of these steel strips significantly affect the tire's grip and drainage performance. Vulcanizing molds for various tires are structurally divided into two types: movable molds and two-part molds. Movable molds typically have 8-12 tread blocks. The mating surface between two tread blocks is called the parting surface. When the steel strip appears at the parting surface, it is subjected to tensile forces along its height and towards one side when the mold opens. This can cause the steel strip to bend, detach, or break, affecting the tire's appearance and performance. Summary of the Invention

[0003] In view of the fact that steel sheets at the parting surface are prone to bending, falling off, and breaking, this utility model provides a steel sheet for the parting surface of the tread block of a tire tread mold.

[0004] The objective of this utility model is achieved in the following manner: A steel sheet for the parting surface of a tire tread block in a tread pattern mold. The steel sheet is located between two ribs on the tread block. The steel sheet is cut into two parts by the parting surface. The shape formed by joining the two parts together is the shape formed by removing the second trapezoid from the upper part of the first trapezoid. The side of the second trapezoid is parallel to the side of the rib, and the distance from the side of the second trapezoid to the side of the rib satisfies w1≤10t. The distance from the bottom edge of the second trapezoid to the surface of the tread block satisfies w2≤10t, t≤1.2mm, where t is the thickness of the steel sheet. The connection between the first trapezoid and the second trapezoid is a rounded transition.

[0005] When the height of the steel sheet H1 is greater than or equal to 15mm, the side of the second trapezoid changes from a straight line to a stepped shape, and the increased step width w3 is less than or equal to 5mm. The base of the second trapezoid, the side of the second trapezoid, and the step are all connected by a rounded transition.

[0006] Compared with the prior art, the steel sheet disclosed in this utility model for the parting surface of the tread block of the tire movable mold has high strength, is not easy to bend, fall off and break, is easy to demold, and avoids damage to the tire tread during demolding. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of this utility model.

[0008] Figure 2 This is another structural schematic diagram of the present invention.

[0009] Figure 3 This is a structural diagram showing the steel sheet located on one side of the rib on the patterned block.

[0010] In the diagram: 1-steel sheet, 2-patterned block, 3-rib, 4-parting surface, 5-first trapezoid, 6-second trapezoid, 7-circular arc, 11-base of the second trapezoid, 12-side of the second trapezoid, 13-side of the rib, 14-step, 15-rotation point. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading the contents of the present invention, those skilled in the art can make various modifications or alterations to the present invention, and these equivalent forms also fall within the scope defined by the present invention.

[0012] like Figure 1 As shown, a steel sheet is used for the parting surface of the tread block of a tire tread mold. The steel sheet 1 is located between two ribs 3 on the tread block 2. The steel sheet 1 is cut into two parts by the parting surface 4. The shape of the two parts after they are joined together is the shape formed by removing the second trapezoid 6 from the upper part of the first trapezoid 5. The side 12 of the second trapezoid is parallel to the side 13 of the rib, and the distance from the side 12 of the second trapezoid to the side 13 of the rib satisfies w1≤10t. The distance from the bottom 11 of the second trapezoid to the surface 15 of the tread block satisfies w2≤10t, t≤1.2mm, where t is the thickness of the steel sheet. The connection between the first trapezoid and the second trapezoid is transitioned by an arc 7.

[0013] A portion of the trapezoidal steel sheet (corresponding to the first trapezoid 3) near the parting surface is removed. This removed portion is also trapezoidal (corresponding to the second trapezoid 6) to reduce the height of the steel sheet near the parting surface. The remaining steel sheet is then divided into two parts along the parting surface 4, with the connection between the removed trapezoid and the remaining trapezoid rounded off. Reducing the height of the steel sheet near the parting surface makes the steel sheet structure less prone to bending, detachment, and breakage, facilitating demolding and preventing damage to the tire tread during demolding, which would affect the tire's appearance and performance.

[0014] Further optimized solutions, such as Figure 2 As shown, when the height of the steel sheet (i.e. the height of the first trapezoid) H1 ≥ 15mm, the side 12 of the second trapezoid changes from a straight line to a stepped shape, and the width w3 of the added step 14 is ≤ 5mm. The bottom edge 11 of the second trapezoid, the side edge 12 of the second trapezoid and the step 14 are all connected by a circular arc 7.

[0015] like Figure 3As shown, when steel sheet 1 is located on one side of the rib 3 on the patterned block 2, and the distance M1 cut by the parting surface 4 is ≤ t, the steel sheet is rotated with the center of the end of the steel sheet near the rib 3 as the rotation point 15, so that the steel sheet is away from the parting surface. The minimum distance between the steel sheet and the parting surface is M2 = 1mm. The dashed line in the figure represents the steel sheet before rotation, and the solid line represents the steel sheet after rotation.

[0016] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.

Claims

1. A steel sheet for the parting surface of the tread block in a tire tread mold, characterized in that: The steel sheet (1) is located between the two ribs (3) on the patterned block (2). The steel sheet (1) is cut into two parts by the parting surface (4). The shape formed by the two parts after they are joined together is the shape formed by removing the second trapezoid (6) from the upper part of the first trapezoid (5). The side (12) of the second trapezoid is parallel to the side (13) of the rib, and the distance from the side (12) of the second trapezoid to the side (13) of the rib satisfies w1≤10t. The distance from the bottom edge (11) of the second trapezoid to the surface (15) of the patterned block satisfies w2≤10t, t≤1.2mm, where t is the thickness of the steel sheet. The connection between the first trapezoid and the second trapezoid is transitioned by an arc (7).

2. The steel sheet for the parting surface of the tread block in a tire movable mold according to claim 1, characterized in that: When the height of the steel sheet H1≥15mm, the side (12) of the second trapezoid is changed from a straight line to a step, and the width of the added step (14) w3≤5mm. The bottom edge (11) of the second trapezoid, the side edge (12) of the second trapezoid and the step (14) are all connected by a circular arc (7).

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