Inverter Unit Centering Mechanism for Glassware Forming
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Solution Overview
Problem
Current hollow glassware forming machines lack a mechanism for precise axial centering of the inverter unit's arms with respect to the blank and finish molds, leading to potential misalignment and production defects.
Innovation Solution
An inverter unit with a centering device that adjusts the position of the arms using a cam-type transmission mechanism to convert rotary motion into translational motion, allowing for precise alignment with the molds, combined with a connection system using screws for secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If no centering mechanism is included in the inverter unit, then the device complexity is reduced, but the manufacturing precision of arm alignment with molds deteriorates
Solution Approach 1:
A centering device is introduced as an intermediary mechanism between the arms and the base structure. This device includes a transmission mechanism with a handwheel that converts rotary motion into translational motion of a centering element, which then adjusts the axial position of the arms relative to the molds, achieving precise alignment without requiring complex integrated positioning systems
Solution Approach 2:
The centering mechanism is segmented into independent components: a handwheel for rotation input, a transmission mechanism for motion conversion, and a centering element for positional adjustment. This segmentation allows each component to perform its specific function simply and effectively, maintaining low overall device complexity while achieving the desired precision
2Manufacturing precision
If a centering mechanism is added to the inverter unit, then the manufacturing precision of arm alignment with molds is improved, but the device complexity increases
Solution Approach 1:
The centering device is designed to be self-operated through a handwheel that directly engages the transmission mechanism. The operator manually rotates the handwheel to achieve centering, and the mechanism self-regulates the positioning through its mechanical design, eliminating the need for external automated positioning systems or complex control mechanisms
Solution Approach 2:
The centering mechanism uses simple, inexpensive mechanical components such as a handwheel, basic transmission elements, and a centering element rather than expensive precision instrumentation. These components are designed for straightforward functionality and can be easily replaced if needed, keeping the overall system cost-effective and simple
3Ease of operation
If manual adjustment of arm position is performed, then the ease of operation is improved, but the manufacturing precision of alignment deteriorates
Solution Approach 1:
The direct manual positioning approach is replaced with a mechanical transmission system that converts easy rotary motion of a handwheel into precise translational motion of the centering element. This substitution maintains operational simplicity while mechanically ensuring the precision required for accurate arm alignment with the molds
Solution Approach 2:
The handwheel provides a curved, ergonomic interface for manual operation, allowing the operator to apply rotational force comfortably. This curved interface transforms simple manual turning into precise linear displacement of the centering element through the transmission mechanism, combining ease of operation with positioning precision
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 accurate, quick, and simple axial alignment of the arms with the molds, reducing the likelihood of misalignment and production defects, while maintaining ease of use and cost-effectiveness.
Implementation Method 1
a transmission mechanism of the cam type, comprising a cam 28 fixed with respect to the pin 27, having an axis C parallel and spaced apart from the axis B, and a seat 29 delimited by lateral surfaces orthogonal to the axis A and parallel to the axes B and C, the cam 28 being in contact with one or the other of such lateral surfaces so as to push the one or the other of such surfaces in a parallel direction to the axis A when it is rotated about the axis B
Data Source
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AI summary
An inverter unit (1) for a hollow glassware forming machine comprises a supporting structure (2); a first and a second pick-and-place arm (3, 4) having one or more recesses (5) for picking up glassware and coupled to such supporting structure (2) so as to rotate about a first axis (A) and so as to translate along such first axis (A) between an open position and a closed position; and a centering device (21) having a head (26), which can rotate about a second axis (B) ; the centering device also has a transmission mechanism, which converts the rotary motion of the head into a translational motion of the supporting structure (2) along the first axis (A) with respect to a fixed base (20).