shoe covering the potential risks and preventive measures of excessive machine load
The "load" of the shoe covering machine usually refers to the number of shoe covers loaded at one time or the intensity of long-term and frequent use. Some users, for the sake of convenience, may put in shoe covers that far exceed the registered capacity at one time, or use them more frequently than the design standard on a daily basis during frequent household visits. What seems to be an operation that "saves replacement time" will actually keep the machine in an overloaded state for a long time, which may lead to mechanical damage, electrical faults and even safety hazards. This article, combining principles and scenarios, analyzes the risks of excessive load and provides targeted prevention plans.
I. Definition and Typical Scenarios of Overload
1. What is "overload"?
The "load" of shoe covering machine consists of two aspects:
• Static load: The number of shoe covers loaded at one time exceeds the "maximum capacity" marked on the machine (for example, if 15 shoes per box are marked but 20 shoes are forced in);
• Dynamic load: The average daily usage frequency far exceeds the designed frequency (for example, a household uses it more than 10 times a day, while the machine is marked as "recommended daily usage ≤5 times").
2. High-frequency overload scenarios
• Family gatherings/festivals: Prepare shoe covers for more than 10 visitors at one time and force them to fill the machine.
• Rainy season/epidemic period: Family members frequently come and go (such as picking up packages in the morning and evening, walking the dog), with an average of more than 15 uses per day.
• Renting a place to make do: To save costs, one buys a small-capacity model but forces extra shoe covers on due to space limitations.
Ii. Four potential Risks of Excessive load
1. Mechanical structure damage: Spring/gear "strike"
The core power of the shoe covering machine relies on an internal spring (manual version) or a micro motor + gear set (automatic version).
• Manual type: If too many shoe covers are loaded at one time (such as more than 20), the spring needs to be compressed to the limit before it can return to its original position. Over time, this will cause fatigue of the spring metal (loss of elasticity), resulting in "no response when pressed" or "weak when coming out of the cover".
• Automatic model: Frequent use (such as more than 10 times a day) will cause the motor to keep running, intensifying the friction of the gear set. Eventually, it may lead to gear jamming and motor burnout (manifested as sleeve jamming and abnormal noise).
2. Frequent out-of-lock faults: A "vicious cycle" of stuck or broken sleeves
Overloaded shoe covers are squeezed and deformed inside the box. When taking them out, the following problems are likely to occur:
• Layered jamming: Due to the squeezing and overlapping of shoe covers, the machine cannot precisely separate individual pieces, resulting in "only half a piece" or "no piece at all".
• Edge tearing: When the deformed shoe covers are pulled, the edges are easily punctured by the burrs at the shoe exit, and the debris falls into the machine interior, further aggravating the jamming.
• Chain card machine: One card holder may cause subsequent shoe covers to accumulate, and the machine needs to be disassembled for cleaning (disassembling the machine by the user themselves may damage the structure).
3. Electrical safety hazards: Overheating/short circuit "Hidden Dangers" (for automatic models)
The automatic type relies on circuit control. If the load exceeds the limit, it will exceed the endurance limit of the electrical components.
• Motor overheating: High-frequency use or overload can cause the motor to operate at high power for a long time, with the coil temperature rising (exceeding 80℃), the insulation layer aging, and there is a possibility of short circuit and fire.
• Control board burnout: The current fluctuations caused by motor overload can impact the capacitors on the control board, leading to component breakdown (manifested as the machine not responding and keys malfunctioning).
• Risk of rechargeable models: For wireless models powered by lithium batteries, overloading will accelerate battery wear (reduce the number of cycles), and even cause swelling and leakage.
4. Safety hazards: Hand pinching/toppling "injuring people and damaging the machine"
• Increased probability of hand pinching: Overloading can cause the condom to come out unsmoothly. Users may forcibly pull, and their fingers are likely to be caught in the condom opening (especially when the automatic model has a delayed sensor).
• Risk of machine toppling: A fully loaded shoe covering machine shifts its center of gravity upward (especially for wall-mounted models). If it is hit by a pet/child, it is more likely to lose balance and fall (injure the foot or damage the wall).
Iii. Preventive Measures for Excessive Load: Full-process control from use to maintenance
1. Clearly define the "load red line" : Operate strictly in accordance with the manual
• Static load: When loading shoe covers at a time, do not exceed the marked capacity (e.g., 15 pieces per box), and reserve 1-2cm of space for the shoe covers to naturally stretch out (to avoid deformation due to compression).
• Dynamic load: The average daily usage frequency should be controlled within the design range (it is recommended that the regular model be used ≤8 times per day and the high-frequency model ≤15 times per day). For festival gatherings, it is advisable to prepare sufficient spare shoe cover boxes in advance to avoid forced "expansion".
2. Choose the right shoe covers: Reduce load pressure from the source
• Size matching: Choose standard thickness (0.08-0.12mm) and standard size (10cm×14cm) universal shoe covers to avoid overly thick or oversized "customized models" (which may increase the resistance of machine operation).
• Soft material: Prefer shoe covers made of PE+ elastic fibers (such as the "Flexible version" of Miaojie), which are easier to be separated by machines than hard plastic shoe covers, reducing the probability of getting stuck (indirectly lowering the load pressure).
3. "Three Don 'ts" for daily use: Reduce additional burdens
• Do not force a "replacement" : As soon as the shoe cover card is released, turn off the power first (for automatic models) or stop pressing (for manual models), clean out the debris at the cover opening, and then try again. Do not force the shoe cover to "make up for the number".
• Do not mix and load: Mixing shoe covers of different brands/materials (such as some thick and some thin) will cause uneven compression inside the box, increasing mechanical wear.
• Do not "run continuously" : After high-frequency use (such as an average of more than 10 times per day for three consecutive days), stop the machine for one day to allow it to "rest" (for automatic models, unplug the power supply; for manual models, avoid pressing).
4. Regular maintenance: Extend the load limit
• Clean the transmission components: Disassemble the upper cover every month (power must be cut off), and use a dry brush to clean the shoe cover debris on the springs/gears (for manual models, focus on cleaning the spring grooves; for automatic models, clean the gear clearances).
• Key lubrication points: For manual spring grooves, a small amount of food-grade lubricating oil (such as WD-40 food-grade spray) can be applied to reduce metal friction (1-2 times a year is sufficient to avoid dust accumulation).
• Check the electrical status: For the automatic model, use a multimeter to test the motor resistance every quarter (the normal value is about 10-20Ω). If the resistance is abnormal (> 30Ω), it may be due to coil aging and needs to be replaced in time.
5. Load Warning: Identify "Overload Signal"
The machine will prompt that the load is excessive through the following phenomena and immediate adjustment is required:
The ejection speed has significantly slowed down (for manual models, the ejection is delayed by more than 2 seconds after pressing, while for automatic models, there is no response for more than 3 seconds after sensing).
• Increased card holder frequency (more than 2 card holders per day);
• Abnormal noise from the motor/spring (the automatic model has a "buzzing" sound, and the manual model has a "creaking" friction sound when pressed);
The body gets hot (the shell temperature of the automatic model is over 50℃, and the spring of the manual model gets hot when pressed).
Iv. Load Management Strategies for Special Scenarios
• Family gatherings/festivals: Prepare 2-3 spare shoe cover boxes (small-capacity models) in advance to avoid overloading each box. Or choose a large-capacity automatic model (such as 20 pieces per box) to distribute the load.
• Rainy season/epidemic period: Choose the automatic model with "drying function" (such as Camellia HC-528) to reduce the resistance of shoe covers when they are taken out due to moisture and adhesion (indirectly reducing the load pressure).
• Renting/small space: Choose the "layered" shoe covering machine (such as the layered model of Meiliya), with a single box capacity of 10 pieces. Layered loading avoids squeezing (suitable for scenarios where the daily usage is ≤5 times).
Summary
shoe covering machine overload is essentially "using the maximum capacity of the machine to cope with excessive demand". It may "save time" in the short term, but in the long term, it will lead to mechanical damage and safety hazards. The key lies in "loading according to standards, choosing the right shoe covers, regular maintenance, and identifying early warnings" : strictly adhering to capacity limits and reducing additional friction; Extend the machine's lifespan through daily maintenance; Make timely adjustments when an overload signal occurs. In this way, shoe covering machine can truly become a "worry-free tool" rather than a "source of frequent maintenance troubles".
www.quenshoecovers.com
Zhejiang Quen Technology Co., Ltd.
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