Injection Molding Slide Mold Terminal Positioning
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Solution Overview
Problem
Existing injection molding techniques face issues with inappropriate exposure, poor positional accuracy, and deformation of insert components like terminal fittings, leading to potential shorting and adhesion of foreign substances, particularly when these components are not considered in the molding process.
Innovation Solution
A method and device for producing resin molded articles that include a terminal fitting as an insert component, utilizing a fixed mold, a movable mold, and a slide mold, where the terminal fitting is positioned and secured through specific inserting means and grooves, allowing precise placement and core-back operation to ensure accurate positioning and prevent exposure during resin injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional injection molding is used without considering insert components, then the molding process is simple, but the terminal fitting experiences inappropriate exposure, poor positional accuracy, and deformation
Solution Approach 1:
The mold is divided into multiple independent components: fixed mold, movable mold, and slide mold. Each component has specific functions - the fixed mold holds the terminal fitting, the movable mold provides injection pressure, and the slide mold positions the terminal fitting precisely. This segmentation allows precise control of each component's position and movement, solving the positional accuracy problem while keeping individual components relatively simple
Solution Approach 2:
The slide mold acts as an intermediary component between the fixed mold and movable mold. It specifically interacts with the terminal fitting to provide precise positioning during injection, preventing exposure and deformation without requiring complex modifications to the entire molding system
2Reliability
If the terminal fitting is exposed during molding, then the molding process is simplified, but shorting and adhesion of foreign substances occur
Solution Approach 1:
The mold cavity is designed with different local characteristics - areas surrounding the terminal fitting are specifically configured to provide coverage and protection, while other areas maintain open access for injection. The slide mold creates a localized protective environment around the terminal fitting during critical phases, preventing foreign substance adhesion and shorting without complicating the overall manufacturing process
3Manufacturing precision
If the terminal fitting position is not precisely controlled, then the molding operation is simpler, but deformation of the terminal fitting occurs causing product defects
Solution Approach 1:
The slide mold is designed to move dynamically to precise positions during the molding cycle. It can adjust its position to accommodate the terminal fitting and maintain precise alignment throughout the injection process. This dynamic positioning capability ensures high positional accuracy without requiring overly complex fixed positioning mechanisms
Data Source
AI summary
Provided is a technology with which, when producing a resin molded article, the inside of which is provided with an insert component such as a terminal fitting, it is possible to prevent the insert component from being exposed at an inappropriate position, and to ensure the desired positional accuracy. In an injection molding device, the accuracy of the position of a terminal is improved by allowing a core-back mold to move after a terminal, which is an insert component, has been inserted in a terminal tip holding section of a slide mold. By allowing the core-back mold to move by only a prescribed amount prior to injection molding, a resin wall is formed between the core-back mold and the terminal. The inappropriate exposure and shorting of and the adhesion of foreign substances to, and the like, the terminal can thus be prevented.