Vacuum Sealing Device for Flexible Waste Containers
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Solution Overview
Problem
Existing devices for vacuuming and sealing flexible waste containers are prone to tearing due to the weight of the contents during the welding process, leading to incomplete sealing and potential leaks, and are not suitable for large-volume sacks as they lack adequate clamp fastening to support the weight.
Innovation Solution
A device with a flat vacuum opening and a welding device arranged within a bordered seal, featuring clamping elements to securely hold the container's opening side, preventing it from tearing and ensuring the weight is absorbed by the vacuum seal, allowing for secure welding without stress on the weld seam.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If external vacuum devices are used with welding outside the vacuum chamber, then the device complexity is reduced, but the container tears off at the weld seam due to weight
Solution Approach 1:
The welding device is nested inside the vacuum chamber rather than being external. The welding element is positioned within the sealed vacuum environment, allowing the container to be welded while supported by the vacuum chamber structure. This eliminates the tearing problem because the container remains anchored during welding, while still maintaining a relatively simple overall device design.
2Ease of operation
If the container is placed on a base before vacuuming, then the ease of operation is improved, but the container lifts off the ground during vacuuming
Solution Approach 1:
The vacuum chamber structure acts as a counterweight and support system. As the container is vacuumed and its contents are pulled upward by atmospheric pressure, the container remains anchored to the vacuum chamber base through friction and the welding process. The chamber structure provides the necessary counterforce to prevent the container from lifting off, while still allowing easy placement and removal by the operator.
3Manufacturing precision
If the welding device is arranged outside the vacuum chamber, then the manufacturing precision is improved, but the container tears off during welding
Solution Approach 1:
The welding device is positioned inside the vacuum chamber, allowing precise welding of the container opening to the chamber seal. The container remains supported and stable during the welding process, enabling the creation of strong, defect-free weld seams. The internal positioning of the welding element provides both the precision needed for quality welding and the structural support to prevent tearing.
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 device ensures a secure and permanent seal of the container, maintaining negative pressure until the weld cools, preventing leaks and allowing for efficient vacuuming and sealing of large-volume sacks without the risk of tearing, while also reducing container size and odor nuisance.
Implementation Method 1
a device for vacuuming flexible containers for waste materials
Implementation Method 2
The negative pressure in the rubbish bag ensures that even if the rubbish bag is not designed to be gas-tight, no air or pollutants bound in the air can escape
Implementation Method 3
The welding takes place by vulcanizing the bag material, with a welding device being arranged between the vacuum chamber and the disposable rubbish bag
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a device for vacuum sealing flexible containers for waste materials, comprising at least one control unit with a holder for the containers, at least one vacuum device, and a welding device, wherein the containers can be inserted into a vacuum opening with their opening side facing the opening. To ensure a reliable seal of the containers with waste materials, the vacuum opening is designed to be flat, and the welding device is arranged within a surrounding seal of the vacuum opening.