Molding Apparatus Core Ring and Split Insert Parting Line
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Solution Overview
Problem
The existing molding technologies face challenges in efficiently forming the neck region of molded articles, such as beverage containers, due to difficulties in accurately defining the neck region within the mold cavity, which can lead to ejection issues and cooling defects.
Innovation Solution
A mold stack configuration that includes a core insert, lock ring, and split insert, with a core ring and split insert defining a parting line vent and utilizing a coolant to prevent cooling defects, allowing for flexible parting line location and improved ejection of molded articles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional split mold inserts (neck rings) are used to form the neck region, then the neck region can be formed, but ejection issues and cooling defects occur
Solution Approach 1:
The mold is divided into multiple segments including cavity plate, core plate, neck rings, and core insert, allowing independent movement and cooling of each segment. The core insert can be independently cooled and positioned, enabling precise control of the neck region formation while avoiding ejection issues that occur with traditional unified mold designs.
Solution Approach 2:
The core insert acts as an intermediary component between the core plate and the neck rings, providing a dedicated cooling channel system and support structure. This intermediary element enables separate cooling control for the neck region, preventing cooling defects and improving ejection reliability.
2Manufacturing precision
If coolant is used to prevent cooling defects, then cooling-related defects are prevented, but the system complexity increases
Solution Approach 1:
The cooling system is designed with localized cooling channels in specific areas where needed - particularly in the core insert and cavity plate regions adjacent to the neck rings. This local cooling approach provides uniform cooling where required without the complexity of a comprehensive cooling system throughout the entire mold.
Solution Approach 2:
The cooling system is segmented into independent channels within different mold components (cavity plate, core plate, core insert), allowing targeted cooling control in each zone. This segmentation enables efficient cooling of critical areas without requiring a complex integrated cooling system.
3Adaptability or versatility
If the parting line location is fixed, then the mold structure is simple, but flexibility in molding different neck region configurations is limited
Solution Approach 1:
The parting line location is made dynamic through the independent movement capability of the core insert relative to the core plate. The core insert can be positioned at different locations along the core plate, allowing the parting line to be adjusted for different neck region configurations while maintaining a relatively simple overall mold structure.
Solution Approach 2:
The mold structure is segmented into independently positionable components (core insert, neck rings, core plate) that can be assembled in different configurations. This segmentation provides flexibility in parting line location without requiring a completely complex reconfigurable mold structure.
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 configuration enhances the formation of neck regions with shorter threads, reduces ejection issues, and prevents cooling-related defects like parting line indentation, ensuring efficient and accurate molding of the neck region.
Implementation Method 1
The core insert includes a cooling channel defined therein through which coolant may flow
Data Source
Figure 1
Figure 2
Figure 3A~3C
AI summary
Disclosed herein is, amongst other things, a molding apparatus that includes a core ring ( 140, 340, 440, 540, 640, 740) that is configured to seat, in use, around a core insert ( 120, 320, 420, 620) in a mold stack ( 1 16, 216, 316, 416, 516, 616, 716). The core ring ( 140, 340, 440, 540, 640, 740) is configured to be received, at least in part, within a pocket ( 152) that is defined within a split insert ( 150) of the mold stack ( 1 16, 216, 316, 416, 516, 616, 716). The core ring ( 140, 340, 440, 540, 640, 740) is also configured to define at least a portion of a molding cavity ( 1 19) having a core ring-to-split insert parting line ( 180) that is within the pocket ( 152) of the split insert ( 150).