Vehicle tire with outer tire containing foamed inner tube for small traffic vehicles with a speed of less than 35km per hour, and its preparation mold and preparation method

Abstract

Disclosed in the present invention is a vehicle tire containing a foamed inner tube in the outer tire of a small traffic vehicle with a speed of less than 35 km per hour, and a production mold and a preparation method thereof, wherein the total proportion of air holes in the foamed inner tube is 30-40% Within the scope; the mold preparation includes driving the rotating member, upper mold, lower mold, locking member and 2 positioning parts; the preparation method is tooling preparation, hanging the vehicle tire, closing the upper mold, starting the power source, injecting material, sending out The main features are bubble reaction and shutting down the power source, and it has good elasticity and load-bearing performance of the finished product; the structure of the preparation mold is reasonable, and centrifugal foaming is performed while feeding; the preparation method is simple and convenient to operate, and the quality is guaranteed. Vehicle tires with foam inner tubes provide technical support.

Description

technical field [0001] The invention relates to a vehicle tire with an outer tire containing a foamed inner tube of a small traffic vehicle with a speed of less than 35 km per hour, a preparation mold and a preparation method thereof, and belongs to the production technology of small traffic vehicle tires. Background technique [0002] The small traffic vehicles with a speed of less than 35km per hour in the present invention refer to bicycles, electric bicycles, human-powered tricycles and baby carriages. [0003] Existing vehicle tires in which the outer tire of the traffic vehicle contains a foamed inner tire, as described in Chinese Patent Application No. 02106719.8, it is a kind of vehicle tire directly injected into the inner cavity of the rubber outer tire Foam plastic), the foaming material expands and fills the inner cavity of the tire, and is combined with the rubber tire to form a vehicle tire with an integral structure. This kind of vehicle tire uses internal fo...

AI Technical Summary

Problems solved by technology

[0006] One is that due to the insufficient structure of the prepared mold, the foam material injected into the vehicle tire will exist in the vehicle tire after its original exhaust gap is blocked when it expands to above the parting surface of the upper and lower molds. The gas in the upper part of the cavity cannot be excluded, so that the surface of the foam is prone to depressions and air cells

[0007] Second, it is only suitable for the preparation of small-diameter vehicle tires below φ300mm

Due to the large amount of foaming material added to tires exceeding φ300mm, the filling time is long, and the foaming reaction time of the foaming material is very short (below 15s), so the foaming material often foams before the filling is completed. Soaked so that the finished product does not meet the rebound and load-bearing properties required by vehicle tires

[0008] The third is that it is difficult to adjust and control the density, pore shape, elasticity and load-bearing performance of the foamed inner carcass because it injects the material before closing the upper mold, and then closes the mold for centrifugal foaming. the quality of the finished product

[0009] The fourth is that it is centrifugal foaming after filling and injecting first, and it cannot be centrifugally thrown while feeding, so it cannot be suitable for the preparation of vehicle tires such as bicycles and electric bicycles with larger diameters and smaller cross-sections.

[0010] In view of the above-mentioned existing patent (application) technology, it is difficult to guarantee the quality and performance of the foamed vehicle tires of bicycles, electric bicycles and manpower tricycles that have a large market demand and require high resilience and different load-bearing. , providing a new foamed vehicle tire has become the expectation of the industry

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