- The mould rack, and the mould shop working
- The PCBA production workshop
- The assembly line, mid-batch
- The inspection bench and the hold area
- The packing tables
Factory
From drawing to carton
Five stages, from the first drawing to a carton that ships. Come and see them with three working days' notice.
Overview
At Shenzhen Sunning Tension in Bao'an District, Shenzhen, a wireless charger moves from industrial design through tooling, board assembly, final assembly and inspection in one place. Rated output is 50,000 to 450,000 pieces per month.
01Process
How a charger gets built here
01
Industrial design
The shape, the interface and the bill of materials, worked backwards from the ex-works price you need to hit. The first thing we check is whether an existing mould already fits: it is the cheapest engineering decision available on any project, and it takes a day.
A specification you can price.
02
Tooling
A new mould: PVC soft rubber from USD 160 and about five working days; metal from USD 500 and about twelve; ABS plastic from USD 1,600 and about fifteen. Tooling time comes before production time, not inside it.
A shape that is yours.
03
PCBA
Boards are placed, reflowed and tested here. The coil, the controller, the protection circuits and the firmware behaviour can all be changed for your product, so a different input port or a different foreign-object-detection threshold is a schedule question, not a negotiation.
A tested board.
04
Assembly
Shell, board, coil, cable and packaging brought together. The first article off the line is confirmed against the specification before the batch is allowed to run.
A finished unit.
05
Inspection
Three gates: incoming raw material, in-process, and finished goods before packing. A batch that fails a gate is held by the inspector at that gate, and nobody on the production side can release it.
A carton that ships.The three gates in detail →
Sunning Tension builds a wireless charger in five stages: industrial design, tooling, PCBA, assembly and inspection.
02Tooling
The mould shop
The rack holds hundreds of existing mould styles, and many of the models cut from them are published in this catalogue with their specifications, minimum orders and price bands. Choosing an existing model means no tooling cost, no tooling lead time, and a shape that has already been through somebody else's production run and somebody else's returns.
If none of them fit, we cut a new one. The prices below are the ones we quote, published here so you can budget before you write the first email.
A new shell mould at Sunning Tension starts at USD 160 in PVC soft rubber, USD 500 in metal and USD 1,600 in ABS plastic.
| Material | Tooling cost | MOQ | Tooling lead time | Why you would choose it |
|---|---|---|---|---|
| PVC soft rubber | From USD 160 | 500 pieces | About 5 working days | Almost any shape, including soft, moulded and figurative forms. |
| Metal | From USD 500 | 3,000 pieces | About 12 working days | The most expensive-feeling shell, and it takes a laser-etched logo. |
| ABS plastic | From USD 1,600 | 5,000 pieces | About 15 working days | Lowest shell cost per piece at volume, with a hard, finished surface. |
Those minimum orders belong to the mould, not to the catalogue. A model that is already tooled starts at 20 pieces.
03Electronics
The PCBA production workshop
This is the half that decides whether your charger is still working in year two.
The board is where a wireless charger is actually good or bad. The coil and its ferrite decide how much power reaches the phone and how much becomes heat in the buyer's hand; the controller decides what happens when a coin, a key or a hotel keycard lands on the pad; the protection circuits decide what happens on a bad day.
Incoming components are inspected against the specification we bought, not the one the supplier would prefer to have sold us, and when a batch fails at goods-in we know which reel it came from.
An engineering change is a real conversation: a different input port, a different output profile, a coil moved 3 mm to clear a magnet ring.
04Capacity
What the factory can actually do
CapacitySunntc
Sunning Tension's rated output is 50,000 to 450,000 pieces per month, and production lead times on the catalogue run from 5 to 30 working days.
| Staff | 100–120 |
|---|---|
| Founded | 2007 |
| Rated monthly output | 50,000 – 450,000 pieces per month, depending on the model |
| Production lead time | 5 – 30 working days; most models 5 – 15 |
| Minimum order | From 20 pieces; most models 200 pieces or fewer |
| Export share | 80–90% of output |
| Main markets | North America, Western Europe, East Asia |
| Office | 5th Floor, Building A, Gushu, Rui Shangju, Xixiang Street, Bao'an District, Shenzhen |
| Factory | 3rd Floor, 25th Road of Furong, Gushu, Xixiang Street, Bao'an District, Shenzhen |
05Visits
Come and audit us
An invitation is not a commitment, so here is the commitment.
What you will be shown
What you will not be shown
Another customer's tooling, artwork or packaging, including anything sitting on the line that day.
It is the same undertaking we are making to you. A factory that will show you somebody else's mould will show somebody else yours.
- Arranged by
- Our team arranges factory visits: sales@sunntc.com or WhatsApp +86 177 2263 6348.
- Notice
- Three working days' notice.
- Auditors
- Your own auditor or a third-party inspection body (SGS, Bureau Veritas, TÜV) is welcome on the same terms. So is a video walk-through if you cannot fly, and that takes one working day to arrange rather than three.
Next
Start with the specification
Send the model or a photograph of the shape you have in mind, the quantity, the destination country and your target landed cost. If a tooled model fits, you will have a price and a lead time in one working day and no tooling bill at all.
