Blow Mold Unit Elevation Rod for Raised Bottom Mold Support
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Solution Overview
Problem
In blow molding machines, the existing systems require additional members to prevent raised bottom molds from falling off during mold replacement, which complicates the process and increases operational burdens.
Innovation Solution
A blow mold unit design that integrates the raised bottom molds with the first and second blow cavity split molds and pressure receiving plates, using a third fixing plate and pressure receiving rod supported by an elevation device, allowing the molds to be handled as an integral body during replacement, eliminating the need for additional support members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the first and second mold clamping plates are opened during mold replacement, then the blow cavity split molds can be separated for replacement, but the raised bottom mold falls off due to lack of support from the lower side
Solution Approach 1:
The elevation rod is preliminarily positioned to engage with the engaged portion of the raised bottom mold before the mold clamping plates are opened. This preliminary positioning ensures that when the clamping plates separate, the elevation rod is already in place to support the raised bottom mold, preventing it from falling off during replacement operations.
Solution Approach 2:
The elevation rod acts as an intermediary member between the mold clamping plates and the raised bottom mold. It transfers the support function from the clamping plates to the raised bottom mold, enabling the raised bottom mold to be securely held even when the clamping plates are opened for replacement.
2Reliability
If additional members are added to prevent the raised bottom mold from falling off, then the support reliability is improved, but the device complexity increases
Solution Approach 1:
The elevation rod serves multiple functions: it elevates the entire blow mold unit during normal operation and simultaneously supports the raised bottom mold during replacement when the clamping plates are opened. By making the elevation rod multi-functional, no additional support members are needed, thus avoiding increased device complexity while maintaining reliability.
Solution Approach 2:
The elevation rod provides self-service by using its own structure to support the raised bottom mold during replacement. Instead of requiring separate support members, the elevation rod's engaged portion directly engages with the raised bottom mold, allowing the system to support itself without external additions.
Data Source
AI summary
A blow mold unit including: a blow mold including first and second blow cavity split molds and a plurality of raised bottom molds; first and second pressure receiving members; first and second fixing plates to which the first and second blow cavity split molds and the first and second pressure receiving members are respectively fixed; a third fixing plate interposed between the first and second fixing plates and to which the raised bottom molds are fixed at a first surface thereof; a pressure receiving rod extending down from a second surface; and a placement portion fixed to at least one of the first and second fixing plates and placing the third fixing plate thereon when the first and second blow cavity split molds are closed. The pressure receiving rod includes a first engaging portion engageable with a second engaging portion in a vertical direction.