Inner tyre production process and extrusion molding device thereof

Abstract

The invention discloses an inner tyre production process and an extrusion molding device thereof. The process comprises a hot molding process of a tyre tube of an inner tyre and a molding step of a tyre tube connector of the inner tyre, wherein in the hot molding process, a step of spraying powder after extrusion refers to spraying of zinc stearate powder and simultaneously cooling of the sprayed powder and the tyre tube; the molding device comprises a powder spraying tube for spraying the zinc stearate powder into the molded inner tyre, a powder feeding tube for conveying the zinc stearate powder and a powder suction tube for sucking away residual powder; and sleeve water cooling systems are arranged at parts, arranged in an inner cavity of an extruding head, of the powder spraying tube, the powder feeding tube and the powder suction tube. According to the inner tyre production process, an extrusion process is improved and the characteristics of the zinc stearate powder are utilized, so that the isolation requirements of extrusion machining are met and the process requirements that splicing is realized and slow air leakage is prevented in a subsequent inner tyre machining production process are also met; and pipelines for spraying the zinc stearate powder and sucking out the zinc stearate powder are internally provided with the cooling systems, circulating water is used for cooling a powder spraying system and influences on the flowing of the zinc stearate powder, caused by high temperature in a machine head, are not caused.

Description

technical field [0001] The invention belongs to the technical field of tire processing and manufacturing, in particular to the technical field of inner tube extrusion molding processing and manufacturing, in particular to the technical field of powder spraying technology in inner tube extrusion molding. Background technique [0002] The tire is mainly composed of a tire, an inner tube, and a pad. The inner tube is an important part of the tire. At present, the pneumatic inner tube is usually manufactured by extrusion molding, including steps such as tire tube extrusion molding and inner tube joint molding. [0003] The commonly used inner tube joint production process includes: tire tube confirmation, confirming that the tire tube specifications meet the required specifications; tire tube width, length inspection, and tire tube size inspection; confirming the butt vulcanization time pressure, temperature and vulcanizing joints; products Self-inspection, confirming that there...

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Problems solved by technology

The disadvantage of this process is that talcum powder is insoluble in the rubber, so the remaining talcum powder in the tire tube has a certain impact on the subsequent processing of the joint process, often resulting in insufficient joint strength or cracking of the joint, which affects the quality; the residual talc powder in the inner tube It also affects the subsequent use of the inner tube. When the joint vulcanized inner tube is inflated, the talc powder left on the rubber sealing ring in the valve core will affect the air tightness, resulting in unstable air pressure in the tire and affecting the driving safety of the car.

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