Joint components used for joining external component
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Solution Overview
Problem
Plastic components face wear issues at joints, especially when connected with other components under load, and blow-molded parts present challenges in forming secure connections due to their thin-walled, hollow configuration.
Innovation Solution
The solution involves embedding a joint component, typically made of metal, within a recessed portion of a plastic body during the blow-molding process, ensuring a stable connection by designing the recessed portion to complement the joint component's configuration, with a width interference fit to secure the joint component in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a joint component is added to prevent wear at connection points, then wear resistance is improved, but the risk of detachment under load increases
Solution Approach 1:
The joint component is nested within a recessed portion of the plastic body, creating a layered structure where the metal joint component is embedded inside the plastic housing. This nesting approach prevents detachment by securing the joint component within the recess while maintaining wear resistance at the connection point.
Solution Approach 2:
The solution transitions from a surface-level attachment to a three-dimensional embedded structure. By creating a recessed portion that extends into the plastic body and designing the joint component with complementary 3D geometry (including interference fit features), the connection stability is enhanced through dimensional integration rather than simple surface mounting.
2Reliability
If a secure connection is formed by embedding the joint component, then connection stability is improved, but the manufacturing complexity increases
Solution Approach 1:
The manufacturing process merges the joint component embedding with the plastic body molding into a single integrated operation. The joint component is positioned in the mold cavity before injection, allowing both the plastic body and the embedded joint component to be formed simultaneously in one molding cycle, thereby reducing overall manufacturing complexity despite the sophisticated embedded structure.
Solution Approach 2:
The joint component is pre-positioned and secured within the mold cavity before the plastic injection process begins. This preliminary placement ensures precise positioning and proper orientation of the joint component, simplifying the subsequent molding process and ensuring consistent embedding quality without requiring complex post-processing steps.
3Ease of repair
If the joint component is made detachable for replacement, then ease of repair is improved, but the connection stability under load deteriorates
Solution Approach 1:
The design segments the joint component from the plastic body through a defined interface at the recessed portion opening. This segmentation allows the joint component to be independently removed and replaced while maintaining a stable connected structure during normal operation. The recessed portion acts as a retention feature that holds the joint component securely during use but permits controlled removal when needed.
Data Source
AI summary
The present application relates to joint components (100) for joining an external component (200). The joint components (100) comprise a body (110) made of plastic and having a first outer surface (Si) in at least one region, and in that region having at least one recessed portion (111) recessed inwardly relative to the first outer surface (S1), the recessed portion (111) having an opening (115); and a joint component (120), the joint component (120) having a joint portion (121) for joining the external component (200), wherein at least a portion of the joint component (120) is arranged within the recessed portion (111) and is restricted by the recessed portion (111) in the direction of a load force (F) applied by the external component (200) to the joint component (120). The joint components of the present application can form a stable connection between the joint component and the plastic body.