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Mould On Tires Precautions

For the curing of various types of tires die. Tire mold classification 1: active mold, by the pattern circle, mold sets, the upper and lower side plate composition. Active mold to distinguish the conical guide active mold and oblique plane oriented active mold 2: two molds, by the upper mold, the lower mold two pieces.

The cord of the radial tire is different from the radial tire of the wheel, but the cord is not crossed, but is parallel to the cross section, like the earth meridian arrangement, the cord angle is small, usually 0 °, the tire There is no connection between the cord, when the tire in the process of driving, the crown around the stress increases, will cause the weekly stretch, the carcass into a radial crack. Therefore, the radial layer of the tire tires with close to the circumferential arrangement of the intertwined cord layer, and the carcass cord angle of 90 ° intersection, usually 70 ° to 78 °, forming a barely can not stretch the rigid ring, the entire tire fixed , Limiting the tire's circumferential deformation, the buffer layer to withstand the entire tire 60% to 70% of the internal stress, as the main force of radial tire components, it is called the radial tire belt. The main force component of the oblique tire is not on the buffer layer, and 80% to 90% of the internal stress is borne by the carcass ply. It can be seen that the radial tire belt design is very important, must have a good rigidity, can be multi-layer large angle, high strength and difficult to stretch the fiber material, such as steel wire or glass fiber

Take the active mold as an example

1: Casting or forging rough blanks according to the tire mold of Minglou Seiko Machinery, then roughing and heat treatment. Tire mold blanks for complete annealing, to eliminate internal stress, annealing should be flat, to avoid deformation is too large.

2: press the drawings to lift the hole, and then press the semi-fine car drawings will be the outer diameter and height of processing in place, with semi-fine car program car lap cavity cavity, car finished with semi-fine model test.

3: with the processing of a good tire mold pattern electrode pattern pattern of electric processing, with a model test.

4: the pattern ring according to the requirements of manufacturers are divided into several copies, respectively, draw the marked line, into the tooling back waist tapping and tapping.

5: in accordance with the process of the division of the equal parts, at the crossed line cut.

6: the cut a good block according to the drawings required to light the pattern, clear angle, clear roots, playing the exhaust hole.

7: the sand inside the block evenly sandblasting, the same color requirements.

8: the pattern ring, mold sets, on the lower side of the board together to complete the tire mold.

Precautions

1, the amount of curing agent should be depending on the temperature, the temperature is reduced. Curing agent used too much, the mold will become harder and brittle; curing agent used too little, the operation time will be extended.

2, in order to prevent changes in silicone properties, it is recommended not to add silicone oil.

3, for your mold to achieve the best results, please put the mold at least 24 hours after use. Tire molds are used for vulcanizing molds of various types of tires.