Leather Cutting Machine with Vacuum Stretching and Automated Belt Transfer
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Solution Overview
Problem
Existing leather cutting machines are limited by manual operations that slow down productivity due to the need for specialized operators to stretch and collect leather pieces, leading to high labor costs and inefficiencies in cutting cycles.
Innovation Solution
The machine employs two closed-loop belts made of permeable material to stretch and hold leathers in place during cutting, allowing for automatic transfer of cut pieces outside the machine, enabling a general operator to collect them and allowing the specialized operator to focus on stretching, thus increasing productivity and reducing labor costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual operations are used to collect and sort cut leather pieces, then the specialized operator can maintain focus on stretching, but productivity is significantly limited by the time required for collection and sorting
Solution Approach 1:
The machine is divided into multiple functional zones: a stretching zone with vacuum holding, a cutting zone with automated cutting head, and a collection zone with conveyor belts. This segmentation allows the specialized operator to focus solely on stretching while automated systems handle cutting and collection, resolving the contradiction between maintaining stretching quality and improving productivity.
Solution Approach 2:
The system uses automated mechanisms including vacuum aspiration to hold leather pieces, automated cutting heads for cutting operations, and conveyor belts for automatic collection and sorting of cut pieces. These self-service mechanisms eliminate the need for manual collection and sorting operations, significantly improving productivity while allowing specialized operators to maintain focus on stretching quality.
2Productivity
If a single operator performs both stretching and collection operations, then labor costs are reduced, but the specialized operator is occupied with collection tasks that do not require their specific competences
Solution Approach 1:
The machine divides operational tasks between different zones: stretching operations in the vacuum-held zone require specialized operators, while collection and sorting operations in the conveyor zone can be performed by general operators. This spatial segmentation allows each operator type to perform tasks matching their skill level, improving overall efficiency while properly utilizing specialized competences.
Solution Approach 2:
Automated intermediary systems including vacuum holding mechanisms, automated cutting heads, and conveyor belts mediate between the specialized stretching operations and the collection operations. These intermediaries allow specialized operators to focus on stretching while general operators handle collection, eliminating the need for specialized operators to perform collection tasks.
3Productivity
If the cutting unit operates continuously with multiple belts, then productivity increases by reducing downtime, but the device complexity increases with multiple activatable belts
Solution Approach 1:
The machine employs multiple independent conveyor belts (first and second belts) that can be activated separately. Each belt has its own control mechanism, allowing independent activation based on cutting operation requirements. This segmentation enables continuous operation and flexible task distribution, improving productivity while maintaining manageable control through modular design.
Solution Approach 2:
The conveyor belts are designed to be dynamically activatable and deactivatable based on operational needs. The control system can activate specific belts during cutting operations and deactivate them when not needed, allowing flexible adaptation to different production requirements. This dynamic capability enables continuous operation and optimized resource utilization while maintaining systematic control.
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 significantly reduces downtime between cutting operations, increases machine productivity, and lowers labor costs by automating the collection process, allowing for continuous operation and efficient use of specialized and general operators.
Implementation Method 1
at least an aspirating plane arranged at the operating area and connected to a depression source such as to maintain the leather stretched and still following activation of the depression source
Implementation Method 2
each belt being activatable, following the completion of he cutting operations thereon, such that the relative upper branch is movable towards the outlet passage in order for the cut leathers to be transferred out of the operating area
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A machine for cutting leathers (1), comprising: a structure (2) which circumscribes an operating area (3) where the leathers are to be laid, maintained stretched and still such as to allow cutting operations; at least an aspirating plane (4, 40) arranged at the operating area (3) and connected to a depression source (9) such as to maintain the leather stretched and still following activation of the depression source (9); a cutting unit (5), borne by the structure (2), arranged above the operating area (3) and movable with respect thereto, such as to realise the cut In the leathers in the operating area (3); the machine (1) comprising at least two closed-loop belts (6, 66) made of a permeable material and flanked to one another, each comprising an upper branch (60, 606) and a lower branch (61, 616), each of the belts (6, 68) being arranged such that the upper branch (60, 606) thereof remains above and in proximity of the aspirating plane (4, 40), in order to restingly receive the leathers to be cut and in order to enable laying of the leathers thereon; the belts (6, 66) being attracted by the aspirating plane (4, 40) following activation of the depression source (9), such that the leathers thereon remain stretched and still; the structure (2) comprising an outlet passage (7) of the leathers, arranged facing the upper branch (60, 606) of each of the belts (6, 66); each belt (6, 66) being activatable, following the completion of the cutting operations thereon, such that the relative upper branch (60, 606) is movable towards the outlet passage (7) in order for the cut leathers to be transferred out of the operating area (3), externally of the structure (2), independently of the other belt (6, 66).