Bag Opening Device With Inclined Guide And Suction
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Solution Overview
Problem
Existing systems for forming bottom openings in tubular bag bodies are unreliable and complex, leading to operational failures and high maintenance efforts, while also limiting production speed and precision.
Innovation Solution
A device with a pre-opening station featuring a guide element with an inclined guide surface and a suction element to separate bag sections, followed by a rotating wedge element that spreads the sections apart to form a precise and reliable bottom opening, reducing structural and maintenance complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional opening devices with multiple suction boxes and complex mechanisms are used, then the bag sections can be separated, but the device complexity increases and reliability decreases
Solution Approach 1:
The opening device is divided into two functional stages: a pre-opening station that creates initial separation between bag sections, and a spreading element that completes the opening. This segmentation allows each component to be simpler while achieving the overall opening function reliably
Solution Approach 2:
The pre-opening station performs preliminary separation of bag sections before the main spreading action. This preliminary action reduces the complexity required for the subsequent spreading element, as the bags are already partially separated and easier to spread
2Ease of repair
If complex opening mechanisms with multiple components are used, then bag sections can be opened, but maintenance efforts increase and service life decreases
Solution Approach 1:
The invention extracts the essential opening function into two simple, discrete components: the pre-opening station and the spreading element. By removing unnecessary intermediate components and mechanisms, the device becomes easier to maintain and repair while extending service life
3Productivity
If traditional opening devices are used, then bag bottoms can be formed, but production speed is limited and precision is reduced
Solution Approach 1:
The spreading element is designed to rotate during operation, dynamically adapting to the bag material and maintaining optimal contact. This rotational motion enables higher production speeds while preserving precision through continuous adjustment to material variations
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 solution enables high-precision and reliable formation of bottom openings with reduced malfunctions and increased production speed, extending the service life of the device and simplifying maintenance.
Implementation Method 1
a suction element with which one of the bag sections can be suctioned onto the guide surface
Implementation Method 2
The rotatable spreading element has a wedge element with at least one wedge surface rising in the opposite direction of rotation
Data Source
Figure 1a
Figure 1b
Figure 2
AI summary
The invention relates to a device and to a method for forming a bottom opening (8) between bag segments (2', 2") at the open end region (9) of a tubular bag body (2), comprising a transport apparatus (3) for transporting the bag body (2) in a transport direction (5) transverse to the longitudinal extent (6) of the bag body and comprising an opening apparatus (7) for forming the bottom opening (8) between the bag segments (2', 2") at the open end region (9) of the tubular bag body (2), wherein the opening apparatus (7) has a pre-opening station (23), wherein the opening apparatus (7) has a spreading element (10) that can be rotated about an axis of rotation (11), wherein the pre-opening station (23) has a guiding element (24, 25) having a guiding surface (24', 25') for one of the bag segments (2', 2") at the open end region (9) of the tubular bag body (2), which guiding surface is tilted from the transport direction (5), wherein the guiding surface (24', 25') is connected to a suctioning element (26) for suctioning the bag segment (2', 2") onto the guiding surface (24', 25').