Quick-Change Mandrel With Active Preform Clamping
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Solution Overview
Problem
The existing transport mandrels used in blow-molding production for preforms are complex to replace and require manual intervention, which is time-consuming and inefficient, especially when switching between different preform types or replacing worn parts.
Innovation Solution
A transport system with detachable head and shaft parts, where the head part can be easily released from the shaft part using an actuating mechanism, allowing for quick and automatic replacement, and utilizing spring-loaded clamping elements for secure holding of preforms during transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If transport mandrels are designed as integrated single pieces, then structural stability is maintained, but replacement complexity increases and manual intervention is required
Solution Approach 1:
The transport mandrel is divided into two separate parts: a shaft part and a head part. The shaft part remains fixed on the transport chain, while the head part can be quickly detached and replaced. This segmentation allows rapid replacement of the head part without affecting the shaft part, resolving the contradiction between ease of replacement and structural stability.
2Productivity
If manual replacement of transport mandrels is used, then simple mechanism is maintained, but productivity decreases due to time-consuming operations
Solution Approach 1:
The mandrel replacement system incorporates self-service features through spring-loaded clamping elements that automatically engage with the preform when the head part is attached. The spring mechanism provides automatic clamping action without requiring manual intervention, enabling rapid replacement while maintaining high productivity.
3Reliability
If spring-loaded clamping elements are used, then preform holding reliability is improved, but device complexity increases
Solution Approach 1:
The clamping mechanism uses spring-loaded elements that provide dynamic, adaptive clamping force. The springs automatically adjust to the preform's position and shape, ensuring reliable holding without requiring complex adjustment mechanisms. This dynamic approach maintains reliability while keeping the device relatively simple.
4Adaptability or versatility
If quick-change mandrels are implemented, then adaptability to different preform types is improved, but manufacturing complexity increases
Solution Approach 1:
By separating the mandrel into a standard shaft part and interchangeable head parts, the system achieves high adaptability to different preform types. Only the head part needs to be changed for different preform specifications, while the shaft part remains universal. This segmentation simplifies manufacturing compared to creating entirely different mandrels for each preform type.
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 design enables rapid and reliable interchangeability of transport mandrels, supporting high-speed preform transport and easy adaptation to different preform sizes, while maintaining a secure grip through spring-loaded clamping elements.
Implementation Method 1
spring-loaded clamping elements for secure holding of preforms during transport
Data Source
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AI summary
The invention relates to a transport system for transporting preforms in a device for the blow-moulding production of finished containers, wherein the transport system comprises a transport chain, the chain elements of which have a support element for transporting the preforms, wherein the support element comprises a shaft part and a head part, and the head part has a head end region that can be introduced into the opening section of the preform, characterised in that the head part is retained on the shaft part and can be detached from the shaft part via actuation of a first actuation element, wherein the first actuation element is arranged in the end region of the shaft part facing away from the head part. The invention also relates to a device for the blow-moulding production of finished containers from preforms, a use, as well as a method for exchanging at least one head part, each making use of the transport system according to the invention.