Connector Receiver Unit Vent Hole Molding With Pin Alignment
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Solution Overview
Problem
Existing connector receiver unit manufacturing methods face challenges in shape accuracy and manufacturing efficiency of communication holes, as well as durability of molding dies, due to the requirement for precise positioning of rods during injection molding, which can lead to displacement and deformation under injection pressure.
Innovation Solution
A method involving a first molding step where both ends of one pin are supported by a molding die, allowing the other pin to engage and align with high accuracy, forming a communication hole with a first concave portion and a second concave portion that intersect, and a closing step where the opening is sealed with a plug portion to enhance durability and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the front end portions of two rods are butted against each other during injection molding, then the communication hole can be formed, but high positioning accuracy is required and the rods may be displaced or deformed due to injection pressure
Solution Approach 1:
The patent introduces a positioning structure consisting of positioning grooves and positioning protrusions as an intermediary mechanism between the two rods. The positioning grooves are formed in one rod, and the positioning protrusions are formed in the other rod. These positioning features engage with each other to maintain precise relative positioning of the rods during injection molding, eliminating the need for complex external positioning systems while ensuring accurate communication hole formation.
2Ease of manufacture
If the rods are cantilevered and extended to form the communication hole, then the communication hole can be created, but the rods may be displaced or deformed due to injection pressure
Solution Approach 1:
The patent applies preliminary action by pre-forming positioning grooves and positioning protrusions on the rods before injection molding. These positioning features are created in advance to ensure that when the rods are assembled and subjected to injection pressure, they maintain their intended positions and shapes. This preliminary preparation prevents displacement and deformation during the molding process, ensuring reliable communication hole formation.
3Productivity
If the front end portions of the rods are butted against each other, then the communication hole is formed, but yield may decrease due to displacement and deformation
Solution Approach 1:
The patent segments the positioning function into two separate components: positioning grooves in one rod and positioning protrusions in the other rod. This segmentation allows each rod to be independently manufactured with its positioning features, then assembled with precise alignment. The divided positioning approach ensures that the communication hole maintains the desired cross-sectional area and shape, preventing defects that would reduce yield while maintaining manufacturing efficiency.
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 approach improves the shape accuracy and manufacturing efficiency of communication holes, enhances the durability of the molding die, and ensures reliable gas exchange through the communication hole, effectively addressing the limitations of previous methods.
Implementation Method 1
both end portions of one of the first pin and the second pin are supported by the molding die, one end portion of the other pin is supported by the molding die, and the other end portion of the other pin engages with the one pin
Implementation Method 2
forming the first molding portion by performing a molding operation with a resin material while a first pin forming the first concave portion, a second pin forming the second concave portion, and the terminal are set in a molding die
Implementation Method 3
a gas inside and outside the housing enters and exits through the communication hole in accordance with a pressure difference inside and outside the housing. As a result, a differential pressure inside and outside the housing is relaxed
Data Source
AI summary
A stator according to an aspect of the present disclosure includes a connector molding portion including a base portion and a mounting portion and a receiver side terminal. The connector molding portion is provided with a communication hole which includes a first concave portion including an inner opening inside a housing extending through the base portion in an X direction and a second concave portion including a bottom surface opening on a bottom surface of the mounting portion extending through the base portion in a Y direction and communicates the inside and outside of the housing through the first concave portion and the second concave portion. The first concave portion penetrates the base portion in the X direction through an outer opening. A rear surface covering portion is provided to close the outer opening.