Blow Molding Mold Unit Integrating Split and Bottom Molds
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Solution Overview
Problem
Existing resin container manufacturing devices face inefficiencies in mold exchange times, particularly in high-mix, small-lot production, due to the large number of mold components required for changing products, leading to decreased production efficiency.
Innovation Solution
A blow molding mold unit with a jig that integrally supports blow cavity split molds and a bottom mold, and a resin container manufacturing device with a bottom mold lifting plate and lifting rod, allowing simultaneous exchange of these components, reducing the time required for mold exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple mold components are used for different products, then product versatility is improved, but mold exchange time increases
Solution Approach 1:
The blow cavity split molds and bottom mold are merged into a single integrated mold unit that is exchanged as one component. This combining of multiple mold components into a unified assembly eliminates the time-consuming process of exchanging individual molds separately, while still maintaining the ability to adapt to different products by changing the entire integrated unit.
Solution Approach 2:
The integrated mold unit is designed with universal applicability to accommodate multiple product types. By creating a multi-functional mold assembly that can be configured for different resin containers, the system achieves both versatility and reduced exchange time through standardized integration mechanisms.
2Adaptability or versatility
If frequent mold exchange is performed for high-mix small-lot production, then product variety is improved, but production efficiency decreases
Solution Approach 1:
By integrating multiple mold components into a single exchangeable unit, the system enables rapid mold changes without the cumulative time penalty of exchanging multiple separate components. This maintains high product variety capability while preserving production efficiency through streamlined exchange operations.
3Ease of manufacture
If multiple mold components are exchanged separately, then flexibility in mold maintenance is improved, but exchange complexity increases
Solution Approach 1:
The integration of blow cavity split molds and bottom mold into a single unit simplifies the exchange procedure to one unified operation. While internal maintenance flexibility is preserved through the modular design of the integrated unit, the overall exchange complexity is reduced by eliminating multiple separate exchange steps.
Data Source
AI summary
A blow molding mold unit includes a pair of blow cavity split molds for forming a blow cavity, the blow cavity defining a shape of a side surface of a resin container, a bottom mold, and a jig configured to integrally support the pair of blow cavity split molds and the bottom mold. In a case where a direction extending from a shoulder portion or a body portion to a bottom portion of the resin container defined by the blow cavity is defined as a first direction, a direction in which the pair of blow cavity split molds are opened is defined as a second direction, and a direction orthogonal to the first direction and the second direction is defined as a third direction, the jig is provided at an end of the blow molding mold unit in the third direction.