Blow molded part including compression molded element
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Solution Overview
Problem
Conventional blow-molding processes are limited in incorporating compression molded elements, as they can only be oriented parallel to the plane of the parting line, restricting their location and configuration within the blow-molded structure.
Innovation Solution
The integration of movable tool components within the mold allows for the creation of compression molded elements that can be located anywhere in the blow-molded structure, including non-parallel orientations, using a dynamic and static compression element configuration to form integral elements during the blow-molding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional compression molded elements are used in blow-molded structures, then the manufacturing process is simple, but the orientation and location of the compression molded elements are limited to be parallel to the parting line plane
Solution Approach 1:
The patent applies the dynamics principle by introducing movable compression molded elements that can change position and orientation within the mold cavity. The elements are designed to move from an initial position during molding to a final position in the blow-molded structure, enabling non-parallel orientations relative to the parting line. This dynamic capability allows the same mold structure to produce compression molded elements at various locations and angles, resolving the contradiction between adaptability and device complexity.
Solution Approach 2:
The patent implements dimensionality change by allowing compression molded elements to extend in multiple spatial dimensions rather than being constrained to a single plane parallel to the parting line. The elements can be oriented at various angles and positioned at different depths within the blow-molded structure, effectively utilizing three-dimensional space. This enables greater orientation and location freedom without proportionally increasing mold complexity.
2Strength
If compression molded elements are restricted to parallel orientations with the parting line, then the mold structure remains simple, but the structural flexibility and strength of the blow-molded structure are limited
Solution Approach 1:
The patent applies local quality by allowing different portions of the blow-molded structure to contain compression molded elements with specific orientations and positions tailored to local structural requirements. Each compression molded element can be strategically placed and oriented to provide targeted strength and flexibility where needed, rather than using a uniform simple design throughout. This enables optimized structural performance while maintaining reasonable manufacturing simplicity.
3Adaptability or versatility
If movable tool components are integrated within the mold to enable free positioning of compression molded elements, then the adaptability increases, but the device complexity increases
Solution Approach 1:
The patent implements merging by integrating the movable tool components directly into the mold structure, combining what could be separate systems into a unified device. The movable compression molded elements are incorporated as part of the mold assembly, allowing them to be positioned and oriented during the molding process itself. This integration reduces the need for separate positioning mechanisms and simplifies the overall device complexity while maintaining high adaptability for creating compression molded elements at various locations and orientations.
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 enables the creation of blow-molded structures with integral compression molded elements that can be positioned freely, enhancing structural flexibility and strength by allowing elements to be formed in various configurations and locations, including non-parallel planes, within the blow-molded structure.
Implementation Method 1
the compression elements are configured and arranged so that one of the compression elements is movable relative to the other compression element, and the compression elements collectively define a gap into which plastic inside the mold can be deposited
Data Source
AI summary
In one example, a structure is provided that includes a plastic body having a unitary, single-piece construction. The plastic body further includes a substantially hollow interior, and a parting line that extends around a portion of the perimeter of the structure. The structure also includes a solid compression molded element that is integral with the plastic body. The solid compression molded element is configured and arranged such that the parting line is not connected to the solid compression molded element.