A kind of inner tube production process and its extrusion molding device

Abstract

The invention discloses an inner tube production process and an extrusion molding device thereof. The process includes the steps of thermoforming the tube of the inner tube and forming the joint of the tube of the inner tube. In the thermoforming, spraying the inner powder after extrusion is spraying zinc stearate powder, and cooling the powder and tube at the same time; the forming device includes The powder injection pipe for spraying zinc stearate powder on the formed inner tube, the powder inlet pipe for conveying the zinc stearate powder spray, and the powder suction pipe for absorbing the remaining powder; the powder injection pipe, powder inlet pipe and powder suction The part of the tube located in the inner cavity of the extrusion head is equipped with a casing water cooling system. The invention improves the extrusion process and utilizes the above-mentioned characteristics of the zinc stearate powder, which not only meets the isolation requirements of extrusion processing, but also meets the technological requirements of achieving better bonding and preventing slow air leakage in subsequent inner tube processing and production; A cooling system is installed in the circuit for spraying zinc stearate powder and sucking zinc stearate powder, and the circulating water is used to cool the powder spraying system to ensure that the high temperature in the machine head does not affect the flow of zinc stearate powder.

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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