Heat Shrink Tunnel Dynamic Width Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional heat shrink tunnels suffer from inefficiencies due to fixed dimensions, leading to thermal losses and inefficiencies when handling loads of varying sizes, as the heating elements are stationary and do not adapt to the size of the load, resulting in wasted heat when the load is smaller than the tunnel.
Innovation Solution
A heat shrink tunnel with dynamically adjustable side walls and top and rear walls, featuring a movable conveyor and heater/blower assemblies with perforated inner walls to direct and draw air efficiently around the load, minimizing heat loss and accommodating loads of different widths through adjustable configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the tunnel width is fixed and large, then the tunnel can accommodate loads of various sizes, but thermal losses and convective losses increase when narrow loads are conveyed through the wide tunnel
Solution Approach 1:
The tunnel width is made dynamically adjustable through movable side wall assemblies that can be positioned at different widths to match the load size. This dynamic adjustment allows the tunnel to adapt to various load dimensions, reducing the gap between the load and tunnel walls, thereby minimizing thermal losses and convective losses when narrow loads are conveyed through the tunnel.
2Device complexity
If the heating elements are stationary, then the tunnel structure is simple, but the heating efficiency decreases when the load size does not match the tunnel width
Solution Approach 1:
The side wall assemblies incorporating heating elements are made movable rather than stationary. This allows the heating elements to be repositioned along with the side walls to match the load width, ensuring efficient heat distribution and heating performance across different load sizes without requiring a completely complex reconfigurable heating system.
3Adaptability or versatility
If the tunnel width is increased to accommodate larger loads, then the tunnel can handle a wider variety of load sizes, but heat is wasted in the empty spaces around smaller loads
Solution Approach 1:
The movable side wall assemblies allow the tunnel to dynamically adjust its width to match the load dimensions. When smaller loads are conveyed, the side walls move inward to reduce the tunnel width, eliminating empty spaces around the load. This ensures that heat is concentrated and utilized efficiently around the load rather than being wasted in unused space, while still maintaining the capability to accommodate larger loads when needed.
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 dynamic width adjustment and airflow management within the tunnel significantly reduce heat losses and improve the efficiency of the shrink wrapping process by ensuring that hot air is effectively utilized only around the load, enhancing the wrapping process for loads of various sizes.
Implementation Method 1
heater/blower assembly has an outlet directed into the product path and draws air from the product path, through its respective plenum
Implementation Method 2
The load is wrapped with the material, which shrinks when subjected to heat
Implementation Method 3
Insulation can be disposed at about the outer walls to reduce heat losses
Data Source
AI summary
A heat shrink tunnel with width adjustment includes a pair of opposing side wall assemblies, each assembly including an outer wall and an inner perforated wall defining a plenum therebetween. The opposing side walls define a product path therebetween having a longitudinal axis. The side wall assemblies are movable toward and away from the axis. A heater/blower assembly is disposed in each of the opposing side walls, each having an outlet directed into the product path and drawing air from the product path, through its respective plenum. A top wall extends between the pair of opposing side wall assemblies and has an adjustable width to accommodate movement of the side wall assemblies.