3 results about "Heel surface" patented technology

This invention discloses a heel shaping machine for protective shoe production, relating to the technical field of shoe material processing equipment. It includes a frame, a support base, a heel, a shaping mold, and a clamping base. The invention employs a clamping cylinder-driven linkage mechanism to control a pressure plate to rotate obliquely downwards to clamp the protective shoe heel blank. During the rotation process, the pressure plate applies not only an inward clamping force to the protective shoe heel blank but also a downward pulling force, ensuring the heel blank is fully stretched and conforms to the heel surface. This prevents the protective shoe heel blank from accumulating or wrinkling in areas with large curvature, or forming uneven creases at seams, thus effectively improving the shaping quality of the protective shoe heel.

To provide a tire that suppresses a decrease in rim assembly performance while offering excellent rim slip resistance and rim fitting performance. [Solution] The tire 10 is equipped with a pair of bead portions 12. The bead portion 12 has a base surface 32, a back surface 34, and a heel surface 36 connecting the base surface 32 and the back surface 34. When the length of the heel surface 36 in the tire width direction W is the heel width length v, the length in the tire diameter direction R is the heel height h, the angle between a virtual extension line L1 extending outward in the tire width direction W of the base surface 32 and a virtual extension line L3 extending in the tire diameter direction of the back surface 34 is the base angle α [rad], and in a tire meridional cross-section view, the radius of curvature of the first connecting portion 38 connecting the back surface 34 and the heel surface 36 is R1, and the radius of curvature of the second connecting portion 40 connecting the base surface 32 and the heel surface 36 is R2, the condition 0.07 ≤ (R2 × v) / (R1 × h) × 1 / α ≤ 0.58 is satisfied.