Overmolding Terminal Blocks via Injection Molding
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Solution Overview
Problem
The telecommunications industry faces inefficiencies and labor-intensive processes in manufacturing terminal blocks, particularly due to the need for hand-poured potting of electrical connectors and wires, which limits production efficiency and flexibility, and restricts the use of certain dielectric materials.
Innovation Solution
A method for overmolding terminal blocks using a preformed substrate with electrical connectors and insulated wires, where a dielectric material is injected into a mold to encapsulate the components, eliminating the need for hand-poured potting and allowing the use of materials not compatible with traditional potting compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hand-poured gravity potting process is used, then environmental and mechanical protection is provided, but labor intensity increases and production efficiency decreases
Solution Approach 1:
The patent replaces the manual gravity-based pouring process with an injection molding system that uses mechanical injection to force dielectric material into the mold cavity. This substitution eliminates the need for hand-pouring while maintaining the protective encapsulation function, thereby resolving the contradiction between reliability and productivity.
Solution Approach 2:
The patent changes the delivery method parameter from gravity-based pouring to pressure-based injection. By controlling injection pressure and material flow parameters, the system achieves complete mold filling and proper encapsulation without manual intervention, improving production efficiency while maintaining protection quality.
2Adaptability or versatility
If hand-poured potting process is used, then flexibility in material selection is limited, but process simplicity is maintained
Solution Approach 1:
The injection molding process allows control of material parameters such as viscosity, temperature, and injection pressure, enabling the use of a wider range of dielectric materials including those with different flow characteristics. This parameter control provides material selection flexibility while the automated process manages the complexity.
Solution Approach 2:
The patent separates the material selection flexibility from the process execution complexity. The injection molding system handles the complex process control, while the operator can independently select from various dielectric materials based on application requirements, effectively segmenting the complexity management from material versatility.
3Loss of time
If insulation displacement contacts (IDC) are used, then wire installation time is reduced, but labor intensity for hand installation and potting remains high
Solution Approach 1:
The patent merges the wire termination step (using IDC) with the encapsulation step (injection molding) into a single integrated process. The pre-assembled terminal blocks with IDC connections are placed in the mold, and the injection molding simultaneously provides structural support and environmental protection, eliminating the need for separate hand-pouring operations and maximizing productivity.
Solution Approach 2:
The patent performs preliminary assembly of the terminal blocks with IDC wire connections before the injection molding process. This preliminary action allows the time-saving benefits of IDC to be realized while the subsequent automated molding process handles the protection step without manual intervention, thereby improving overall production efficiency.
4Ease of manufacture
If traditional potting compounds are used, then process compatibility is maintained, but material selection is restricted
Solution Approach 1:
The injection molding process enables control of material parameters such as melting temperature, viscosity, and injection pressure, allowing the use of thermoplastic dielectric materials that are incompatible with traditional potting compounds. This parameter control provides access to a broader range of materials while maintaining ease of manufacture through standardized injection molding procedures.
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 process reduces labor intensity, increases production efficiency, and enables the use of a wider range of dielectric materials, resulting in a more efficient and flexible manufacturing method for terminal blocks.
Implementation Method 1
injecting a dielectric material into the mold containing the podium member to form an overmolded terminal block
Implementation Method 2
The gel cures and solidifies the components into a solid mass, which protects the electrical circuit from moisture, dust, contaminants, vibrations and impact damage
Data Source
AI summary
A method of manufacturing a terminal block for a telecommunication cable comprising the steps of providing a preformed substrate member comprising a podium member, at least one electrical connector and at least one insulated electrical wire attached to an electrical contact positioned within the at least one electrical connector; placing the preformed substrate member in a mold; and injecting a dielectric material into the mold containing the podium member to form an overmolded terminal block, wherein the dielectric material covers the at least one insulated electrical wire and a portion of the electrical contact positioned within the at least one electrical connector.