The door hinge can be made of cheap pressed steel or brittle zinc alloy, often attached directly into a plastic mount on the door trim.
Weak hinges and mounts/bushes can cause the door to drop or fail at any time, e.g. due to a person leaning on the door.
In the longer term damage can be caused by people leaning on the door or placing wet washing on it, causing a fatigue crack or distortion of the bush/mount on the door trim.
Damaged hinges can also lead to excess stress on the door latch and premature failure.
The specification below provides the recommended improvements needed to improve product durability. They are ranked from bronze to gold based on the effectiveness of the change in improving durability, with bronze being the minimum and gold being the maximum.
Simple and strong attachments; specified for 1300 cycles
Corrosion protection on steel parts; specified for 1,800 cycles
Specified for 2,300 cycles
Look for potential weaknesses in the door/hinge/latch by leaning on the door and opening closing it. Ask for clear evidence of the requirements listed above, e.g.: technical specifications, drawings, photographs; test data (ideally from an independent test house), quality control data.
* Door to be tested on 10 randomly selected production machines without cracking/damage, deflecting (beyond 2mm in any direction) or otherwise failing in 100% of cases. Load test to involve a vertical downward weight of 25kg being applied to the top of the open door for 1 min (i.e. vertically at its highest point). Door to be opened and slammed shut once per cycle. Specific test details to be provided and may be informed by BS 6222
Improved reliability of components can reduce early returns and improve brand reputation which, in turn, can lower business costs and increase long-term sales.
To calculate overall cost savings for your business, use the WRAP cost/benefit analysis tool (currently in draft form and available on request).
Stronger door and hinges
Use of stronger door mouldings with stronger e.g. steel mounts/inserts and stronger and more corrosion resistant hinges (e.g. cast aluminium alloys) will add a small amount to cost of the unit, tens of pence or potentially several pounds if new mouldings are required.
A simulated test as described, although accelerated, will require a significant number of man hours, hence adding cost per unit.