Preform Feeding System with Flow Control Removal
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Solution Overview
Problem
Existing systems for feeding preforms to blow-molding machines fail to effectively eliminate preforms that are incorrectly oriented, such as those laid flat and oriented longitudinally, leading to machine shutdowns and manual intervention.
Innovation Solution
A system with a sorting and alignment device featuring alignment rollers and a flow control portion that blocks incorrectly oriented preforms, combined with an expulsion device for lateral unloading, allows for the removal of incorrectly positioned preforms without requiring movable rail sections, ensuring efficient feeding without interfering with the existing rail structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional filtration means (brushes) are used to eliminate incorrectly positioned preforms, then some incorrectly positioned preforms are removed, but preforms laid flat and oriented longitudinally are not eliminated, causing machine shutdowns
Solution Approach 1:
The patent applies the dynamics principle by making the conveyance rails movable rather than fixed. The rails can change their relative position to create an interspace that selectively allows correctly oriented preforms to pass while blocking and enabling lateral unloading of incorrectly oriented preforms. This dynamic adjustment resolves the contradiction by adapting the system's geometry to the orientation of each preform, achieving both high reliability and complete elimination effectiveness.
Solution Approach 2:
The patent applies preliminary action by positioning the flow control portion and expulsion device upstream to detect and remove incorrectly oriented preforms before they reach the blow-molding machine. The system proactively creates conditions (flow control blocking, lateral unloading) that prevent problematic preforms from causing machine shutdowns, rather than reacting after they cause failures.
2Reliability
If movable rail sections are used to unload incorrectly oriented preforms, then all types of incorrectly positioned preforms can be eliminated, but the construction complexity of the system increases
Solution Approach 1:
The patent applies dynamics by implementing movable rails that can adjust their position. The rails are configured to be movable relative to each other, allowing the system to dynamically create an interspace for selective preform unloading. This resolves the contradiction by using controlled movement to achieve precise orientation control without requiring overly complex fixed structures.
Solution Approach 2:
The patent applies universality by designing the movable rails to serve multiple functions: they convey preforms forward, selectively block incorrectly oriented preforms through flow control, and enable lateral unloading when needed. This multi-functionality reduces the need for separate dedicated components, thereby managing complexity while achieving reliable orientation control.
3Reliability
If the flow control portion blocks incorrectly oriented preforms, then lateral unloading can be achieved, but the system requires additional expulsion devices
Solution Approach 1:
The patent applies merging by combining the flow control portion and expulsion device into an integrated removal system. The flow control portion blocks incorrectly oriented preforms, and the expulsion device laterally unloads them, with both functions working together as a unified mechanism. This integration achieves reliable incorrect preform removal while managing complexity through functional consolidation rather than adding entirely separate systems.
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
The system effectively unloads incorrectly oriented preforms, preventing machine blockages and shutdowns while maintaining the integrity of correctly aligned preforms, thus enhancing the operational reliability of the blow-molding process.
Implementation Method 1
under the effect of gravity, the preforms are made to arrange themselves between the two rollers
Implementation Method 2
The two rollers are made to rotate in mutually opposite directions and are mutually spaced apart so as to leave an interspace between the two rollers
Data Source
Figure 1~1a
Figure 2
Figure 3
AI summary
A system (1) for feeding preforms (10) to a container blow-molding machine (20), which comprises, in sequence along a longitudinal advancement direction (100) of the preforms (10), at least one sorting and alignment device (2) which is fed with randomly arranged preforms and comprises at least two alignment rollers (3a, 3b) which are substantially parallel, can rotate about the respective axes (101, 102) and are intended to arrange the preforms in conveyance tracks (4a, 4b) which are inclined with respect to the horizontal, in order to feed them to the blow-molding machine (20), the system (1) comprising means (30) for removing the incorrectly positioned preforms, which are individually laid flat and arrive from the alignment rollers (3a, 3b) on the conveyance tracks (4a, 4b) and are oriented parallel to the longitudinal advancement direction (100); the removal means (30) comprise an upper guide (31) which has at least one flow control portion (31a) which is arranged, at least in one active blocking position thereof, above the end of the alignment rollers (3 a, 3b) which is proximate to the conveyance tracks (4a, 4b) at a distance from the alignment rollers (3a, 3b) which is such as to allow the passage below the flow control portion (31a) of the correctly oriented preforms (10) and block the longitudinal end, which is arranged upstream with respect to the longitudinal advancement direction (100), of the incorrectly oriented preforms (10) when the incorrectly oriented preforms straddle the alignment rollers (3a, 3b) and the conveyance tracks (4a, 4b), the removal means (30) comprising means (35) for unloading the incorrectly oriented preforms which are blocked by the flow control portion (31a).