With the rapid spread of new-energy vehicles, charging piles—key infrastructure—are drawing more attention to their reliability and durability.
Because piles operate outdoors for years, exposed to wind, rain, dust and other harsh conditions, the water- and dust-proof performance of their housings is critical.
During assembly, screws with rubber sealing washers are widely used to improve enclosure sealing and protect internal components.
However, in traditional assembly the rubber washer often jams in the thread, causing frequent screw-jamming and serious loss of efficiency.
This paper explains how innovative technologies such as the step-type screw feeder and the “blow-plus-suction” module optimize new-energy charging-pile housing assembly and raise both productivity and product reliability.

Water- & Dust-Tightness: Core Requirement of Housing Assembly

The charging-pile shell is the first barrier protecting internal circuits and components.
Outdoors, rain, moisture and dust can penetrate the enclosure, causing short circuits or corrosion, so assembly must guarantee a high seal level.
A screw with an elastic rubber washer forms a tight seal when tightened, preventing foreign matter from entering.
Yet during automatic feeding the washer can easily be caught by the thread, producing a jam.
This not only delays production but can also damage the screw and finally weaken the sealing effect.

Step-Type Screw Feeder: An Innovative Answer to Washer-Induced Jamming

To solve the jamming of rubber-washer screws, Danikor combines a step-type screw feeder with a downward-pressing mechanism.
The technology feeds screws in stages and presses the washer accurately, ensuring the rubber pad stays tightly against the screw head and reducing the chance of contact between washer and thread.
Specifically, the step design adjusts screw position gradually, avoiding sudden friction and jamming, while the pressing unit applies uniform force to fix the washer.
This method greatly lowers the jam rate, increases assembly efficiency and keeps housing production running smoothly.

Blow-Plus-Suction Module: Precise Control Where Interference Occurs

In charging-pile housing assembly, limited space often causes interference at the tightening point, influencing screw perpendicularity and stability.
Traditional horizontal tightening is disturbed by gravity, making the screw tilt and degrading the seal.
The “blow-plus-suction” module was developed for this situation.
A precision-machined nose piece holds and vacuums the screw, keeping it vertical during the whole driving process.
Even when the tool operates horizontally, gravity effects are offset and interference is avoided.

The technology improves assembly accuracy and extends the life of both screw and housing.

Danikor has rich experience in new-energy charging-pile assembly.
By adopting the step-type feeder and the blow-plus-suction module, the company has eliminated washer jamming and interference in housing assembly.
Its line now achieves a screw-feeding success rate of up to 95 %, raises assembly efficiency by more than 30 %, and guarantees that the charging-pile housing meets IP65 water- and dust-proof rating.
These innovations cut maintenance costs and strengthen product reliability in outdoor environments, giving users a safer charging experience.