Electromotive Lifting Gear for Deep-Drawing Packaging
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Solution Overview
Problem
Existing deep-drawing packaging machines with drive components underneath the tool have restricted travel and inability to hold positions for high closure forces, limiting their functionality.
Innovation Solution
An electromotive lifting gear with two parallel spindles arranged outside the collision region, eliminating the need for knuckle joint components underneath the tool, allowing extended travel without increasing working height, and incorporating telescopic springs and brakes for high retention forces, along with a belt drive system for precise positioning and media supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If drive components are arranged underneath the tool, then the structure is compact, but the travel is restricted and positioning flexibility is limited
Solution Approach 1:
The lifting spindles are arranged laterally outside the collision region rather than underneath the tool, transitioning from a vertical stacking arrangement to a lateral distribution. This dimensional repositioning allows the tool to achieve extended vertical travel without interference from drive components, while maintaining structural compactness through optimized spatial distribution.
Solution Approach 2:
The lifting gear is segmented into multiple independent lifting spindles (at least two) positioned at different lateral locations. This segmentation allows each spindle to operate independently within its own space, eliminating the need for complex knuckle joint mechanisms underneath the tool and enabling greater travel distance without increasing overall device complexity.
2Reliability
If knuckle joint lifting gear is used, then the structure is self-supporting, but the tool cannot be held in any position for high closure forces
Solution Approach 1:
The passive mechanical knuckle joint system is replaced with an electromotive lifting system using driven spindles. This substitution enables active control of the tool position through motorized actuation, allowing the tool to be held at any position within the travel range and to withstand high closure forces reliably, while providing full positioning flexibility along the entire stroke.
3Length of moving object
If working height is increased to extend travel, then the travel distance increases, but the machine footprint and accessibility are worsened
Solution Approach 1:
Instead of increasing travel distance by raising the working height vertically, the solution uses lateral arrangement of lifting spindles outside the collision region. This allows the tool to achieve extended vertical travel while maintaining a compact working height, effectively decoupling travel distance from machine height through optimized component layout.
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
Enables longer travel and flexible positioning of the tool, accommodating high retention forces and varying film thicknesses, improving handling and tool change accessibility while maintaining hygiene standards.
Implementation Method 1
The lifting gear can comprise at least two lifting spindles (38) which are arranged parallel to the guides (33) and, in a plan view, outside the collision region (K) of the tool (32)
Implementation Method 2
The lifting gear can have brakes (41) which lock the lifting spindles (38) to permit high retention forces acting from an upper tool part (47) onto the moveable tool (32) by the occurring and required closure forces
Implementation Method 3
The lifting spindles (38) can be covered by telescopic springs (39) to meet high demands on hygiene, for example in the medical or food field
Data Source
AI summary
The invention relates to a deep-drawing packaging machine with a lifting gear for a forming station, sealing station or cutting station, wherein the lifting gear provides guides and lifting spindles which are arranged outside a collision region of a movable tool.