Overmolded Bar Feeder Body for Precision and Vibration Damping
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Solution Overview
Problem
Current bar feeder assembly systems face issues with dimensional drift, high assembly times, labor costs, and noise/vibration due to the sequential assembly of metal components, leading to reduced precision and increased production costs.
Innovation Solution
A method involving a combined molding and overmolding process using reusable molds and countermolds to create an integral central assembly that replaces traditional aluminum components, enhancing structural and functional elements, such as guide channels and anchoring elements, while improving rigidity and reducing noise/vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional metal components are assembled sequentially, then the bar feeder can be manufactured with standard machining processes, but dimensional drift occurs during assembly which reduces overall precision
Solution Approach 1:
The patent combines multiple separate metal components (central beam, aluminum section, guide channel segments, anchorage elements) into a single integrated body made of polymer concrete. This merging eliminates the sequential assembly process that caused dimensional drift, as all elements are formed together in one molding operation, thereby improving guiding precision while reducing assembly complexity.
Solution Approach 2:
The patent uses polymer concrete, a composite material consisting of polymer resin and cement, to create the integrated body. This composite material allows for complex geometries to be formed through molding processes, enabling the integration of multiple functional elements (structural support, guiding channels, anchorage features) that would traditionally require separate metal components and complex assembly procedures.
2Productivity
If guide channel segments are assembled one by one, then flexibility in assembly is maintained, but assembly time increases significantly
Solution Approach 1:
The patent merges the assembly of multiple guide channel segments into a single molding operation. The mold includes integrated cavities for all guide channel segments, allowing them to be formed and positioned simultaneously as one piece rather than assembled sequentially. This eliminates the time-consuming step-by-step assembly process while maintaining the functional segmentation of guide channels.
Solution Approach 2:
The patent employs preliminary action by pre-forming all guide channel segments, anchorage elements, and structural features within the mold cavities before the final curing process. The mold design incorporates all necessary geometric features and positioning elements in advance, so that when the polymer concrete is molded, all components are already in their correct positions and orientations, eliminating the need for time-consuming post-assembly adjustments.
3Object-affected harmful factors
If metal sections are used for the frame, then structural strength is achieved, but the weight is relatively low which increases noise and vibration
Solution Approach 1:
The patent uses polymer concrete, a composite material combining polymer resin with cement and aggregate, to create the frame body. This composite provides high density and mass compared to traditional metal sections, which naturally dampens vibrations and reduces noise from bar rotation. The composite material achieves the necessary structural strength while providing superior vibration damping characteristics due to its heterogeneous composition and high mass.
Solution Approach 2:
The patent changes the physical parameters of the frame by transitioning from lightweight metal sections to dense polymer concrete. This parameter change in material density and mass directly addresses the noise and vibration issue, as the increased mass provides natural vibration damping without requiring additional vibration control mechanisms. The polymer concrete's viscoelastic properties further contribute to vibration attenuation.
4Ease of manufacture
If multiple separate components are manufactured and assembled, then manufacturing flexibility is maintained, but production costs increase due to high labor and machining costs
Solution Approach 1:
The patent merges the manufacturing of multiple separate components into a single integrated molding process. The mold design incorporates cavities for the central beam, guide channel segments, anchorage elements, and other features, allowing all these elements to be formed simultaneously in one operation. This eliminates the need for separate machining and assembly operations for each component, significantly reducing labor costs and manufacturing complexity while maintaining production flexibility.
Solution Approach 2:
The patent replaces traditional mechanical machining processes with a molding process. Instead of machining metal sections and guide channels separately using CNC machines and other mechanical tools, the invention uses mold cavities to form all features directly in the polymer concrete. This substitution eliminates expensive machining operations and reduces the need for precision mechanical assembly, thereby lowering production costs.
Data Source
AI summary
Method of producing a body (1) for bar feeders, wherein it comprises a first molding step (A) carried out with the aid of a first molding material (M1) in a mold (20) jointly with an overmolding step (B) of a countermold (50), the shape of the mold (20) and/or the shape impressions of the countermold being conceived to achieve in an integral way at least one structural and/or functional element of the said bar feeder.