Tire pasting drum with ultra-large expansion and shrinkage ratio

Abstract

The invention relates to a tire pasting drum with an ultra-large expansion and shrinkage ratio, which is used for forming a radial tire blank. The pasting drum comprises a power transmission mechanism, a drum tile expansion and shrinkage mechanism and an expanded drum diameter adjustment mechanism, and is characterized in that the drum tile expansion and shrinkage mechanism comprises a driving seat, long connection rods, sliding blocks, main tiles and auxiliary tiles; the driving seat is connected with an inner shaft through connection blocks; the long connection rods are respectively hinged with the driving seat and the sliding blocks through pin shafts; the main tiles are arranged on the sliding blocks; one edge of each auxiliary tile is fixed on the corresponding main tile, and the other edge of each auxiliary tile is hasped onto the adjacent main tile, so that the ultra-large expansion and shrinkage ratio can be obtained, and slits among drum tiles during drum expansion are eliminated; and therefore, the tire manufacturing specification range of equipment is greatly expanded, and the tire blank forming quality is improved; the expanded drum diameter adjustment mechanism is adjusted by a built-in screw; a handwheel rotation screw moves a nut to limit the travel of the inner shaft, so that the aim of adjusting the diameter of an expanded drum is fulfilled; the specification of the pasting drum is convenient to adjust, and the pasting drum is high in operation safety.

Description

technical field [0001] The invention relates to a rubber tire machine, which is the second step equipment for forming radial tire blanks, in particular to a super-large expansion-contraction ratio tire lamination for agricultural or engineering semi-steel wire or full-fiber radial tire blank forming drum. Background technique [0002] At present, the laminating drums used for the two-stage molding of 24”~46” agricultural semi-steel wire or full-fiber radial tires mainly include double-cone linear guide rail type and built-in cylinder connecting rod slide plate type. In practical applications, there are certain defects. , mainly manifested in: [0003] (1) Small expansion-shrinkage ratio: The expansion-shrinkage ratio of the lamination drum refers to the ratio of the maximum diameter of the expansion drum to the minimum diameter of the shrinkage drum. Taking the molded 24” tire as an example, the minimum diameter of the shrinkage drum is generally 880mm. Traditional laminati...

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Problems solved by technology

[0003] (1) Small expansion-shrinkage ratio: The expansion-shrinkage ratio of the lamination drum refers to the ratio of the maximum diameter of the expansion drum to the minimum diameter of the shrinkage drum. Taking the molded 24” tire as an example, the minimum diameter of the shrinkage drum is generally 880mm. Traditional lamination The maximum diameter of the drum is 1000mm, and the calculated expansion and contraction ratio is 1.136, that is, the diameter expansion and contraction amount is 120mm, the diameter expands and shrinks, and the adjustable range is small

[0004] (2) It is difficult to change the tire molding specifications: when changing the tire molding specifications, the traditional laminating drum generally adopts the method of replacing the outer tile or superimposing the outer tile, which is not only difficult to operate, but also prone to assembly errors, which affects the molding quality

[0005] (3) Uneven pressing: When the traditional laminating drum expands and contracts, there is a certain gap between adjacent drum tiles. The greater the expansion, the larger the gap. When pressing the material, the material is not pressed firmly, resulting in poor lamination quality OK, affects tire build quality

[0006] (4) The limit adjustment mechanism is unstable and the operation safety is poor: some traditional lamination drums use a limit adjustment mechanism composed of an adjustment bolt, an adjustment nut, a limit screw and a limit plate installed on the outer end of the lamination drum spindle. The nut is in the middle of the 4 limit screws, which is inconvenient to adjust. Moreover, the adjustment nut is easy to loosen under the frequent collision of the limit plate, which makes the diameter of the expansion drum unstable.

Moreover, both the limit screw and the limit plate are moving parts, which also affect the safety of the operation

[0007] (5) The air circuit is complex and there are many faults: Some traditional laminating drums are driven by built-in cylinders, and the air circuit is distributed inside the forming machine and the laminating drum spindle, which is not only difficult to manufacture, but also increases the incidence of faults including poor sealing

[0008] (6) The quality is too heavy, the rigidity is poor, and the accuracy is difficult to guarantee: whether the traditional laminating drum is a double-cone linear guide rail type or a built-in cylinder connecting rod slide plate type, there are many parts and complex structures, which make the laminating drum quality difficult. If it is too heavy, not only the force on the main shaft will increase, but also the difficulty will increase, and it will easily cause the difficulty in opening the upper half of the drum tiles and the excessive sag of the lower half drum tiles, making it difficult to guarantee the fitting accuracy.

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