Single Polygonal Guide Rail for Mold Box Alignment Stability
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Solution Overview
Problem
Existing injection molding machines with cylindrical main guide rail pillars are complex and expensive to manufacture, require high precision, and suffer from uneven temperature distribution leading to wear, while also limiting space for mold cavities and cores due to additional alignment systems.
Innovation Solution
The use of a single main guide rail pillar with a polygonal cross-sectional shape, such as rectangular, simplifies the construction, reduces material usage and cost, and improves alignment precision, eliminating the need for additional alignment systems by providing stable and precise mold plate movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If cylindrical main guide rail pillars are used, then stable construction is achieved, but manufacturing complexity and cost increase due to high precision requirements
Solution Approach 1:
The patent changes the geometric parameter of the guide rail pillar from cylindrical to polygonal cross-section. This parameter change maintains the stability function while significantly reducing manufacturing complexity, as polygonal shapes are easier to produce with standard machining processes and do not require the high precision cylindrical grinding that traditional cylindrical pillars demand.
Solution Approach 2:
The patent introduces asymmetric flat surfaces on the polygonal cross-section of the guide rail pillar. These flat surfaces provide reference planes for alignment and positioning, eliminating the need for separate alignment systems. The asymmetric geometry maintains structural stability while simplifying the overall manufacturing process.
2Manufacturing precision
If additional alignment systems are provided, then correct alignment of mold plates is secured, but space for mold cavities and cores is reduced
Solution Approach 1:
The patent merges the alignment function into the main guide rail pillar structure itself. The flat surfaces on the polygonal cross-section of the pillar serve dual purposes: providing mechanical guidance and ensuring precise alignment of the mold plates. This integration eliminates the need for separate alignment systems such as conical protrusions or positioning bars, thereby freeing up space for mold cavities and cores.
3Ease of operation
If cylindrical guide rails are used, then mold plates can slide smoothly, but uneven temperature distribution causes uneven wear
Solution Approach 1:
The patent applies local quality by creating flat surfaces at specific locations on the polygonal cross-section of the guide rail pillar. These flat surfaces are strategically positioned to provide stable contact areas for the mold plates during sliding motion. The localized flat surfaces ensure uniform pressure distribution and contact, which promotes even wear patterns and improves reliability under varying temperature conditions.
4Stability of the object's composition
If multiple guide rail pillars are used, then stability is improved, but material usage and cost increase
Solution Approach 1:
The patent changes the cross-sectional geometry parameter to polygonal shape with flat surfaces, which increases the effective contact area and structural efficiency per unit of material. This parameter change allows a single guide rail pillar to provide sufficient guidance stability, eliminating the need for multiple pillars and reducing overall material consumption.
Data Source
AI summary
A mold box having a first mold plate and a second mold plate. The mold box includes a single elongate guide rail extending through a bore defined by the second mold plate. The single elongate guild rail allows the second mold plate to be movably arranged relative to the first mold plate.