Conveyor Module Over-Molded Cup Assembly for Reliable Roller Retention

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Solution Overview

Problem

Conventional conveyor systems face challenges such as complex roller attachments, surface and axle tube discontinuities leading to premature failure, difficulty in replacing directional rollers, and contamination traps due to complex geometry interfaces.

Innovation Solution

A conveyor module design featuring a unified cup-in-module combination with a hollow interior, opposing sockets, and a method of over-molding the cup assembly within a conveyor module, ensuring secure attachment without post-molding assembly, and incorporating visual alignment indicators for presetting angular orientation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional roller attachment methods (ultrasonic welding, epoxy, solvent-bonding, threading) are used, then roller attachment is achieved, but the process is time-consuming, expensive, and unreliable

Engineering Contradiction:

Improveroller attachment reliabilityVSAvoidmanufacturing time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The cup and module are merged into a single unified structure through over-molding, where the cup is molded directly onto the module in one integrated manufacturing process. This eliminates the need for separate attachment operations and creates a permanent, reliable bond without requiring post-molding assembly steps.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The cup is pre-positioned on the module with alignment features (such as ribs or locators) before the over-molding process begins. This preliminary positioning ensures correct orientation and location, allowing the molding process to immediately secure the cup without requiring subsequent adjustment or attachment operations.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If conventional roller attachment methods are used, then roller attachment is achieved, but the process is complex and expensive

Engineering Contradiction:

Improveroller attachment reliabilityVSAvoidmanufacturing simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If complex geometry interfaces are used for roller attachment, then roller retention is achieved, but contamination traps are created

Engineering Contradiction:

Improveroller retentionVSAvoidcontamination

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The interface between the cup and module uses simple, smooth geometric features (such as peripheral surfaces and ribs) that provide adequate retention while maintaining a clean, contamination-free surface. The over-molded joint creates a homogeneous surface without complex geometries that could trap contaminants, while still providing sufficient mechanical interlocking for reliable retention.

Inventive Principle:

Principle #3Local quality

4Adaptability or versatility

If directional rollers are used, then product handling capability is improved, but replacement difficulty increases

Engineering Contradiction:

Improveproduct handling capabilityVSAvoidroller replacement ease

Core Design Contradiction:

Adaptability or versatilityVSEase of repair

Solution Approach 1:

The system allows for dynamic reconfiguration by enabling the cup assembly to be rotated to different angular orientations (such as 0, 45, 90, or 135 degrees) before over-molding. This provides adaptability for different product handling requirements while maintaining ease of replacement, as the entire cup assembly can be removed and reoriented as a single unit without complex disassembly procedures.

Inventive Principle:

Principle #15Dynamics

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 solution provides a durable, easy-to-clean, and cost-effective conveyor system resistant to vertical and angular dislodgement in high-impact environments, with simplified manufacturing and reduced contamination risk.

Implementation Method 1

a method of over-molding a preassembled cup assembly in a conveyor module

Methodology Applied

Scientific EffectOver-molding:

Implementation Method 2

A thermoplastic material is then injected between the molds around the axle ends

Methodology Applied

Scientific EffectInjection molding:

Data Source

PatentUS12351398B2Conveyor module and method of manufacturing

Publication Date: 2025.07.08 SAFARI BELTING SYST

AI summary

A conveyor module is disclosed. The module is formed around one or more cup assemblies. The cup assembly comprises a cup having a top formed flush with the top surface of the module, and a bottom formed flush with the bottom surface of the module. The cup has a hollow interior and a pair of opposing sockets positioned in the interior. An axle extends between the sockets. A roller is mounted on the axle and extends above the top surface of the module, and may also extend below the bottom surface of the module. The cup assembly comprises a cup having a top having a top perimeter, and a bottom having a bottom perimeter. A centerline of the cup has a middle perimeter. The top perimeter and the bottom perimeter are shorter than the middle perimeter.