Ventilation Channel Network for Tire Demolding
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Solution Overview
Problem
High demolding forces are required to detach a fully vulcanized pneumatic vehicle tire from its mold due to chemical adhesion and rubber deformation, which can lead to tire damage, and existing methods do not effectively address these issues.
Innovation Solution
A ventilation channel network is formed between the segment shoe and profile insert, allowing a pressurized gaseous medium to be distributed through ventilation bores, with a peripheral seal limiting the vent hole field to prevent pressure loss, facilitating demolding by using compressed air under pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If high demolding forces are applied to detach the tire from the mold, then the tire can be removed from the mold, but the tire may be damaged
Solution Approach 1:
A gaseous medium is introduced as an intermediary between the tire and mold segments. The gas penetrates through ventilation bores and channels to the adhesive interface, reducing adhesion forces and facilitating demolding without applying high mechanical forces that could damage the tire
Solution Approach 2:
The invention uses pressurized gas (pneumatics) to assist demolding. Gas is supplied through ventilation bores and distributed via ventilation channel networks to create pressure at the adhesive interface, reducing the force needed to separate the tire from the mold
2Productivity
If compressed air is supplied to ventilation bores without a ventilation channel network, then demolding is supported, but pressure is lost and effectiveness is reduced
Solution Approach 1:
The ventilation system is segmented into a network of channels that distribute gas to specific areas. The ventilation channel network divides the gas supply into multiple pathways, directing compressed air precisely to the adhesive interface areas that need assistance for demolding, preventing pressure loss
Solution Approach 2:
The ventilation channel network provides localized gas supply to specific areas of the adhesive interface. Different regions receive gas through dedicated channels, ensuring that pressure is applied where needed most for effective demolding without wasting compressed air
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 method effectively supports demolding by reducing the forces needed to detach the tire from the mold without pressure loss, using compressed air to open vent units and distribute air through the ventilation channel network, thus preventing tire damage.
Implementation Method 1
a pressurized gaseous medium is passed through the mold segments through the ventilation bores in the direction of the vulcanized tire
Implementation Method 2
the medium supplied under pressure is distributed in a ventilation bore area via a ventilation channel network formed between the segment shoe and the profile insert
Implementation Method 3
the vent hole field is limited by a peripheral seal that seals the profile insert against the segment shoe
Implementation Method 4
A ventilation channel network is formed between the segment shoe and profile insert, allowing a pressurized gaseous medium to be distributed through ventilation bores
Data Source
Figure 1~2
Figure 3~4
AI summary
The method involves forming mold segment (1) that consists of segment shoe (1'). The segment shoe is provided with vent holes (4) that are connected via profile insert (2). The vulcanization mold passed via vent holes is directed in direction of pneumatic tire. A vacuum supplied to pressurized gaseous medium and venting passage network is distributed in vent bore field. A rotation of profile insert and sealing gasket (16) is limited with respect to segment shoe. An independent claim is included for a device for supporting demolding of vulcanized pneumatic tire for vehicle.