Blow Molding Suction Unit for Product Posture Stability
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Solution Overview
Problem
In injection blow forming, the final molding product may become unstable during mold opening after blow molding, leading to potential scratching due to contact with the split mold when it falls freely.
Innovation Solution
A suction unit is employed to start suction of the bottom portion of the final molding product after mold opening begins, maintaining the product's posture until it is separated from the mold, using a split mold that closes before blow molding and opens after completion, and a first bottom portion mold that forms part of the mold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the split mold performs mold opening after blow molding is completed, then the final molding product can be removed from the mold, but the final molding product becomes unstable and may contact the split mold causing scratching
Solution Approach 1:
A suction unit is introduced as an intermediary device between the mold and the final molding product. The suction unit maintains adsorption of the product during the mold opening process, acting as a mediator that prevents direct contact between the unstable product and the mold surfaces, thereby eliminating scratching while enabling successful mold opening
Solution Approach 2:
The suction unit initiates adsorption of the final molding product before the split mold completes its opening motion. This preliminary action stabilizes the product in advance, preventing instability and contact with the mold during the subsequent opening process
2Productivity
If the final molding product is allowed to fall freely after mold opening, then the product can be separated from the mold, but the product posture becomes unstable leading to potential contact and scratching
Solution Approach 1:
The suction unit maintains continuous adsorption of the final molding product throughout the entire mold opening process and during product separation. This continuous action ensures uninterrupted posture stability, allowing rapid product removal without free-fall instability or contact with mold surfaces
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
The suction unit stabilizes the final molding product's posture, preventing it from contacting and being scratched by the mold during free fall, ensuring a stable removal process.
Implementation Method 1
a suction unit that starts suction of at least a part of the bottom portion of a final molding product
Data Source
AI summary
A blow molding mechanism includes a split mold that forms a part of a mold used in blow molding with respect to an intermediate molding product, performs mold closing before the blow molding starts, and performs mold opening after the blow molding is completed; a first bottom portion mold that forms a part of the mold, and molds at least a part of a bottom portion of the intermediate molding product on a side opposite to a mouth portion; and a suction unit that starts suction of at least a part of the bottom portion of a final molding product after the mold opening is performed and before the final molding product is separated from the first bottom portion mold, at the same time as the split mold performs the mold opening, or before the split mold performs the mold opening, after the blow molding is completed.