Abstract
This Chapter is devoted to the description of the conceptual design of an industrial product, the SASIB ALFA Packer (Sasib S.p.a., Bologna, now part of the COESIA Group, Italy), an automatic machine for the packaging industry, developed in the eighties, under the direction of one of the authors. The Dante Alighieri motto “It is true that, as a form is frequently discordant with the intention of an art, because its matter in response is deaf”, reminds us that in any human activity a gap always exists between theory and practical implementation. Design of artifacts shows a deep gap between conceptual phase and realization inside a business oriented organization. While theory gives guidelines for the design of a product, industrial practice is product oriented, i.e. its goal is to “develop a new product” taking into account any related activity “from cradle to grave”; while theory takes into account essentially “physical” constraints, a real mass production must consider human and social constraints such as time, expenditure, human resources, customers, and stakeholders, psychology, etc.
Vero che, come forma non s’accorda molte fiate all’intenzion de l’arte, perché a risponder la materia è sorda,
Now it is true we all too often find his finished work belies an artist’s purpose, when his matter is deaf and won’t respond,
(Dante Alighieri: La Divina Commedia, Paradiso I, 129. Translated by J. G. Nichols)
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- 1.
In statics, a structure is hyperstatic (or statically indeterminate) when the static equilibrium equations are insufficient for determining the internal forces and reactions on that structure, since unknown forces (or variables) are more than the equilibrium equations. Vice versa, the system becomes isostatic (or statically determinate) when equilibrium equations are sufficient determine forces and reactions on the structure.
In the sense, the word hyperstatic means having excessive or redundant constraints with respect to those strictly necessary.
- 2.
Instrumental good: something considered as a means to some other product; i.e., an instrumental product leads to something else that is product.
Consumer or intrinsic product on the contrary, is definable in relation to instrumental product. Consumer or intrinsic product is something worthwhile not because it leads to something else, but for its own sake alone. It is not a means to something else.
- 3.
A stepper motor is a brushless DC electric motor that moves in discrete steps.
- 4.
Cathode Ray Tube technology, pre-LCD (Liquid Crystal Display).
- 5.
Computer Aided Design.
- 6.
Elio Pagella the head of mechanical design. Olivetti S.p.a. was one of information technology players with a century-long tradition of research and innovation.
- 7.
The teams were managed by Mario Salmon (with the help of E. Pagella) without a formal structure.
- 8.
In those years the industries were strongly integrated and also possessed carpentry departments for packaging and models: the additive manufacturing was still a long way away!.
- 9.
A Programmable Logic Controller (PLC) is a computer designed to work in an industrial environment that continuously monitors the status of devices connected as inputs.
- 10.
For sake of clarity, all figures, if not declared, were supplied by the COESIA group and shows the machine as it is produced now; the electrical control system described is the original one.
- 11.
The reason is different from that presented in another chapter on the control of the vibrations of the springs in the distribution of the valves in an internal combustion engine: in this case, the choice of desmodromic cams allows the optimization of the laws for the forward stroke and for the back stroke. However, the choice makes use of a current experience in the area (especially for the technological problem of processing and mechanical treatments).
- 12.
The packaging product must meet the precise technical requirements (that can not be modified), set by the companies that sell the product.
- 13.
Functions described by imperative tense.
References
JMAC (2018) Variety reduction program. https://english.jmac.co.jp/wp-content/uploads/2010/07/rd20f.pdf
Techreport (1976) Robotica e Automatismi Multiscopo per Industrie Manufatturiere. Technical report, Olivetti spa
Ulrich KT, Eppinger S (2008) Product design and development, 5th edn. Mc-Graw Hill. ISBN: 978-0073404776
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Freddi, A., Salmon, M. (2019). Design of a Packaging Machine: General Description and Conceptualization. In: Design Principles and Methodologies. Springer Tracts in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-319-95342-7_9
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DOI: https://doi.org/10.1007/978-3-319-95342-7_9
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