Vulcanizing Mold Shoulder Ventilation Slots
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vulcanizing molds for vehicle tires often result in visible ventilation paths along the circumferential direction, particularly in the shoulder area, which are aesthetically undesirable and can lead to manufacturing quality issues due to rubber expulsion and contamination.
Innovation Solution
The introduction of ventilation slots within the negative profile elements of the mold segments forming the tire shoulders, eliminating venting gaps in this area, ensures effective ventilation without rubber penetration or contamination, using slots with specific dimensions and orientations to facilitate air discharge and easy cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If venting gaps are formed between adjacent partial mold segments, then ventilation effectiveness is improved and air discharge is enhanced, but rubber material is pressed or sucked into the gaps causing visible ventilation paths and contamination in the shoulder area
Solution Approach 1:
The patent applies different venting strategies to different regions of the mold surface. In the shoulder area (critical region), ventilation slots are arranged within the negative profile elements rather than using gaps between partial mold segments. Outside the shoulder area, conventional venting gaps are used. This local differentiation allows effective ventilation while preventing rubber expulsion in the visually critical shoulder region.
Solution Approach 2:
The mold surface is divided into partial mold segments that can be interchangeably arranged. The ventilation slots are integrated into specific partial mold segments forming the shoulder area, allowing flexible configuration and replacement of venting components without redesigning the entire mold system.
2Manufacturing precision
If ventilation slots are arranged within negative profile elements in the shoulder area, then rubber expulsion is minimized and manufacturing quality is improved, but ventilation effectiveness must be maintained without the benefit of circumferential gap coverage
Solution Approach 1:
Ventilation slots are specifically positioned within the negative profile elements in the shoulder area, creating localized ventilation channels that prevent rubber intrusion while maintaining air discharge capability. The slots are oriented and dimensioned to provide sufficient ventilation for the critical shoulder region.
Solution Approach 2:
The negative profile elements serve as an intermediary structure that incorporates ventilation slots. These profile elements with integrated slots act as a mediator between the mold segments and the tire rubber, allowing air to pass through while preventing rubber material from entering the venting paths.
3Object-affected harmful factors
If venting gaps are omitted in the shoulder area, then contamination is prevented, but alternative ventilation means must be implemented within the profile elements
Solution Approach 1:
The ventilation function is merged with the negative profile elements in the shoulder area. Instead of separate venting components, the ventilation slots are integrated directly into the profile element structure, eliminating the need for additional complex venting mechanisms while preventing contamination.
Solution Approach 2:
The negative profile elements serve multiple functions: they shape the tire shoulder geometry and simultaneously provide ventilation through integrated slots. This multi-functionality reduces the need for separate venting components and simplifies the overall mold structure in the critical shoulder region.
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
This solution minimizes flash and contamination in the shoulder area, maintaining excellent manufacturing quality by ensuring efficient ventilation while preventing rubber from entering the ventilation slots, thus enhancing the visual appeal and performance of the tires.
Implementation Method 1
narrow venting gaps are formed between two adjacently arranged partial mold segments (8), which form a venting means (5) connected to the atmosphere
Implementation Method 2
The unvulcanized green green tire is heat-pressed in the vulcanization mold and transformed into its final rubber-elastic state by cross-linking rubber reactions
Implementation Method 3
The unvulcanized green green tire is heat-pressed in the vulcanization mold
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The vulcanizing mold (1) has multiple mold segments (2) that are together formed to a circumferentially closed mold. The ventilation slots are arranged inside the negative-profile elements of the partial-mold segments which form the tire shoulders. The ventilation slots are waived off in area of the partial-mold segments. The vents and the ventilation slots are the individual ventilation units within a molding area (3). Each partial-mold segment forms a tire shoulder.