Freezing mould bag
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current freezing mould bags either lack the security of self-closing functionality when filled under pressure or the ease of knot closure, with existing self-closing bags requiring orientation changes and knot tie bags not allowing expansion chambers due to material weakening placement.
Innovation Solution
A freezing mould bag design featuring expansion chambers formed outside the peripheral joint at the top, with material weakenings running from the side edge at an angle to the filling duct, enabling communication with freezing mould compartments and allowing for knot closure, while maintaining self-closing functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If material weakenings are placed at the top of the bag for knot closure, then easy knot tying is achieved, but expansion chambers cannot be formed due to joint placement constraints
Solution Approach 1:
The bag is divided into distinct functional zones: expansion chambers are formed in the upper portion between the filling duct and material weakenings, while the lower portion maintains continuous joints for structural integrity. This segmentation allows both expansion chambers and knot closure to coexist without interference.
Solution Approach 2:
The material weakenings are positioned at an angle relative to the filling duct, creating a diagonal arrangement that accommodates both the expansion chamber geometry and the knot-tying functionality. This angular positioning resolves the spatial conflict between the two features.
2Productivity
If the bag is filled under pressure, then filling speed is improved, but joints at freezing mould compartments are at risk of breaking
Solution Approach 1:
Expansion chambers are formed in advance at the upper portion of the bag to act as cushioning spaces that absorb pressure fluctuations during filling. These pre-formed chambers reduce peak pressures transmitted to the joints at the freezing mould compartments, preventing joint failure while maintaining fast filling speeds.
3Object-affected harmful factors
If self-closing valve flaps are provided at the filling duct, then spillage is reduced when turned upside down, but the bag requires orientation changes to function
Solution Approach 1:
The closing valve flaps are pre-positioned at the filling duct opening to automatically seal the bag when turned upside down. The expansion chambers are also pre-formed to contain liquid even before the valve flaps engage, providing an additional layer of spillage prevention that works independently of bag orientation.
4Reliability
If expansion chambers are formed, then pressure absorption during filling is improved, but device complexity increases
Solution Approach 1:
The expansion chambers are formed using the existing flexible film material of the bag itself, rather than adding rigid structural components. The chambers are created by strategically placing material weakenings and joints that allow the flexible film to form volumetric expansion spaces, maintaining simplicity while providing pressure absorption capability.
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 design provides secure self-closing and knot closure options, reducing spillage and facilitating easy filling and emptying, particularly in dot-bags where individual joints are at risk of breaking under pressure.
Implementation Method 1
a material weakening of the superposed film pieces for establishing a severing
Implementation Method 2
expansion chambers formed at one or both sides of the filling duct
Implementation Method 3
closing valve flaps connected by the film pieces at the filling opening and extending from the filling opening into the interior of the bag
Data Source
Figure 1a~1b
Figure 2
AI summary
A freezing mould bag is described. The bag is formed of two sheet-shaped film pieces which are welded together for forming freezing mould compartments. A filling duct is delimited by separate joints, enabling filling of the inner compartment of the bag. There are provided closing valve flaps that are connected with the film pieces at the filling opening in such a way that two closing pockets, which open towards the inner compartment of the bag, are provided. The joints at the freezing mould compartments are broken for establishing communication with an expansion chamber which is delimited by further joints of the two film pieces. With the object of using such a self-closing bag as a knot tie bag, the freezing mould bag is provided with a material weakening of the superposed film pieces at each their side of the filling duct. The material weakenings are provided at an angle relative to the joint delimiting the freezing mould compartments. Thus it is possible to have expansion chambers at a position under the material weakenings. The material weakening runs from the side edges of the freezing mould compartment to a position near the mouth of the filling duct in the inner compartment. By such a freezing mould bag, application as a self-closing bag or a knot tie bag is possible.