Extrusion Mold for Non-Pneumatic Multi-Hole Hollow Tires
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Solution Overview
Problem
Current tire technologies, such as inner tube, single-hole, and solid tires, face limitations in material efficiency, elasticity, and vulnerability to punctures, with a lack of suitable rubber extrusion molds for producing non-pneumatic multi-hole hollow tires that are both elastic and material-saving.
Innovation Solution
An extrusion mold comprising a mold frame and core with a feeding passageway and discharge hole, featuring multiple mold blocks that match the tire holes, connected via a thin-wall strap, ensuring efficient rubber molding and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional inner tube and cover tire structure is used, then the tire can be manufactured through established processes, but the inner tube becomes vulnerable to pricking and requires replacement
Solution Approach 1:
The tire structure is segmented into multiple hollow holes distributed across the tire body, with each hole independently formed through the extrusion mold. This segmentation allows the tire to distribute mechanical stress across multiple points, preventing single-point failure from pricking while maintaining manufacturing simplicity through the extrusion process.
Solution Approach 2:
Instead of using a traditional solid or single-hole structure, the invention inverts the approach by creating multiple hollow holes within the tire body. This inversion transforms the vulnerability of single-point failure into a distributed strength system, where the hollow holes actually contribute to the tire's puncture resistance while maintaining ease of manufacture through extrusion.
2Device complexity
If single-hole tire without inner tube is used, then the structure is simplified, but the tire still requires charging and replacement after pricking
Solution Approach 1:
The single-hole structure is segmented into multiple hollow holes distributed across the tire. This segmentation maintains the simplified no-inner-tube structure while improving puncture resistance through distributed stress distribution. The extrusion mold enables this segmentation to be achieved efficiently during manufacturing.
Solution Approach 2:
The tire structure incorporates multiple hollow holes that create a porous-like distribution of air chambers throughout the tire body. This porous structure allows the tire to maintain simplicity without inner tube while improving puncture resistance through the distributed air chamber system that can accommodate and distribute impact forces.
3Reliability
If solid tire is used, then the tire is not vulnerable to pricking, but it lacks elasticity and requires many materials
Solution Approach 1:
The solid tire structure is transformed into a multi-hole hollow structure through the extrusion mold. This creates a porous-like distribution of hollow chambers that maintains puncture resistance while restoring elasticity. The hollow holes allow the tire material to flex and deform more effectively, improving elasticity without compromising puncture resistance.
Solution Approach 2:
The tire structure combines solid rubber material with hollow air chambers in a composite configuration. This composite structure leverages the puncture resistance of the solid material while the hollow chambers provide elasticity and reduce overall material usage. The extrusion mold enables this composite structure to be manufactured efficiently.
4Device complexity
If conventional extrusion mold is used, then the mold structure is simple, but the mold core location is difficult to achieve
Solution Approach 1:
The mold core is segmented into multiple separate mold blocks, each responsible for forming a specific hollow hole. This segmentation makes it easier to position and adjust each mold block independently, achieving precise control over the location and shape of each hollow hole while keeping the overall mold structure relatively simple.
Solution Approach 2:
The extrusion mold acts as an intermediary device that translates the extruder's material flow into the precise multi-hole hollow tire structure. The mold blocks within the mold frame serve as intermediary elements that guide and shape the rubber material into the desired hollow hole configurations with high precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables the production of non-pneumatic, puncture-resistant, and elastic tires, reducing material usage and simplifying the manufacturing process, thereby enhancing safety and versatility in tire production.
Implementation Method 1
one end of the feeding passageway 3 communicates with the feed inlet of the extruder's feeder and the other end of which communicates with the discharge hole 4 in the mold core 2
Data Source
AI summary
The invention discloses an extrusion mold for non-pneumatic multi-hole hollow tires, which can be used for producing the hollow tires which are non-pneumatic, highly elastic and materials-saving and is characterized by consisting of the mold frame (1) and the mold core (2), with one end of the mold frame (1) connected with the extruder's feeder and the other end connected with the mold core (2); inside the mold frame (1) is provided a feeding via (3), one end of which communicates with the feed inlet of the extruder's feeder and the other end communicates with the discharge hole (4) of the mold core (2); the discharge hole (4) is provided with several mold blocks (5), which match the shape of the hollow holes in the tires and are directly or indirectly connected with the wall of the discharge hole (4) through a thin-wall connection strap (6).