Plastic Preform Alignment Using Suction Belt Recirculation

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Solution Overview

Problem

Existing apparatus for aligning and orienting plastic preforms for container production are complex, costly, and lack reliability, making them inefficient and difficult to implement.

Innovation Solution

A simple and reliable apparatus with a conveyor system and suction mechanism that aligns and orients plastic preforms using a conveyor device with adjustable speed and a suction ribbon belt, along with jamming prevention and recirculation features to ensure proper positioning and orientation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If complex inclined devices with multiple receptacles and slots are used for preform alignment, then preform orientation capability is improved, but device complexity and cost increase

Engineering Contradiction:

Improvepreform orientation capabilityVSAvoiddevice complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent extracts the alignment function from complex mechanical structures and implements it through a simple suction belt system. The suction belt with selectively activated suction zones replaces the need for inclined devices with multiple receptacles, slots, and guiding ramps, achieving preform alignment through localized vacuum application rather than mechanical guidance structures.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces mechanical alignment mechanisms (inclined planes, receptacles, slots, guiding ramps) with a pneumatic system using a suction belt. The suction zones create localized vacuum fields that manipulate preform positions through air pressure differentials, eliminating the need for complex mechanical guidance structures.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Manufacturing precision

If multiple conveyors and intermediate devices are used for preform handling, then preform positioning precision is improved, but device complexity and cost increase

Engineering Contradiction:

Improvepreform positioning precisionVSAvoiddevice complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The suction belt performs multiple functions simultaneously: it conveys preforms, orients them vertically, positions them precisely, and prevents jamming all in a single integrated component. This multi-functional approach replaces what would traditionally require separate conveyors, orientation devices, and positioning mechanisms.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The suction belt acts as an intermediary between the bulk preform storage and the blow molding machine. It provides a controlled transition zone where preforms are gradually oriented and positioned through selective suction activation, mediating the transfer without requiring multiple intermediate handling devices.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If traditional alignment devices without recirculation are used, then device simplicity is maintained, but productivity decreases due to jamming

Engineering Contradiction:

ImproveproductivityVSAvoiddevice complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The recirculation system ensures continuous operation by automatically returning jammed preforms to the input zone for re-processing. This maintains continuous productive action without manual intervention, as the suction belt continuously cycles preforms that fail to orient properly back into the alignment process.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The recirculation mechanism provides automatic feedback control for jammed preforms. When preforms fail to orient correctly or cause jamming, they are automatically detected and returned to the input zone through the recirculation path, allowing the system to self-correct without stopping production.

Inventive Principle:

Principle #23Feedback

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 apparatus efficiently aligns and orients plastic preforms with reduced complexity, cost, and improved reliability, allowing direct feeding into blow molding machines without intermediate conveyors, and includes features for automatic jam clearance.

Implementation Method 1

a suction ribbon belt (8a) configured to transfer the preforms toward the feeder element (20)

Methodology Applied

Scientific EffectSuction: Suction

Data Source

PatentUS20250376338A1Apparatus for the alignment and orientation of plastic preforms

Publication Date: 2025.12.11 ACMI BEVERAGE SPA

AI summary

An apparatus for the orientation and alignment of plastic preforms provided with collars having greater dimensions than the preform body, includes a device for feeding the preforms at a first end of an unloading and conveyance surface that includes a conveyor device for conveying the preforms from the first end towards a second end, the conveyor device includes a slot formed by a pair of longitudinal movement bodies which move the preforms along a direction of longitudinal extension of the slot. The conveyor device includes at least one conveyor element which forms a resting surface for the preforms and is adapted to move the preforms arranged on the resting surface along a movement direction, which is opposite to the conveyance direction, in order to move the preforms not received by the slot from the second end toward the first end.