Capacitor Discharge (Convex) Spot Welder

OEM & custom branding Customisable Samples available CE

Capacitor discharge spot and projection welding machine designed for conductive metal components, offering fast charging, short welding times, high output current and consistent welding quality.

Specification

Rated capacity	20 kVA
Input voltage	380V three phase, 415V three phase
Cooling Water Flow	10 L/min
Inverter_Frequency	1000 HZ

About this product

The Capacitor Discharge (Convex) Spot Welder uses capacitor energy storage technology based on a charge-discharge principle. Compared with traditional mains-frequency and medium-frequency spot and projection welders, the capacitor discharge system provides lower instantaneous power requirements, fast charging, short welding times and high output current.

The machine is designed to provide strong and reliable welds while helping maintain good surface quality. According to the supplied product information, the welding process can reduce post-weld blackening, discoloration and significant deformation, which can reduce the need for subsequent grinding.

The machine is primarily designed for conductive metal materials such as nuts, bolts, stainless steel and carbon steel. It is suitable for applications in automotive, aerospace, defense, new energy, energy storage, hardware, home appliances, telecommunications and electrical equipment industries.

The available models include DKR-6000, DKR-15000, DKR-30000 and DKR-45000, with different capacitor capacities, rated power, welding current and pressure configurations.

OEM, ODM & customised orders

This photo shows a typical example of the style. Size, material, colour, quantity and delivery timing are set to your order — we quote each one.

OEM — your logo, colours and packaging on this style
ODM — we develop the design with you, from a sketch or a sample
Customised — size, material, function and finish changed to your specification
Any quantity discussed — trial orders, container loads or a project

Quoted to your order

Price depends on quantity, spec, branding and destination — tell us what you need and we come back with a written quote.

OEM / ODM: Yes
Customised products: Yes
Sample: Available
Quantity & timing: Quoted to your order

✓Supplier vetted by our team in China

✓Pre-shipment inspection before payment is released

✓One contract and one invoice — we are the supplier of record

Need something slightly different?

✦ Brief it with our assistant

OEM · ODM · Customised

Make this style your product

What you see is a typical example. Tell us what to change — we build it to your order and quote the quantity and timing you actually need.

Your logo & branding Printed, engraved, embossed or moulded in — on the product and the packaging.

Colour & material Pantone-matched colours and the material grade your market asks for.

Size & specification Dimensions, capacity, power or fittings changed to your drawing or sample.

Packaging Retail boxes, inserts, labels and barcodes to your artwork.

New design (ODM) Start from a sketch, a reference sample or an idea — we develop it with the factory.

Any order size Trial runs, container loads or a full project. Quantity is agreed per order.

Minimum quantity, delivery time and price depend on what you customise — they come with your written quote, not from a list.

How a customised order runs

You tell us what to changeLogo, colour, size, packaging — or a whole new design
1
Written quotePrice, quantity and timing for exactly that order
2
Sample for approvalYou sign off a sample before bulk production
3
ProductionAt the factory, against the sample you approved
4
Inspection & shippingChecked with photos before payment is released, then shipped to your port
✓

Customise with AI

Make it yours.
Brief it in a minute.

Tell the assistant your quantity, branding, packaging and port. It asks what the factory will ask, then hands our team a brief with this product already attached.

Starts with Capacitor Discharge (Convex) Spot Welder on your brief
OEM, ODM or fully customised — it asks what the factory will ask
Our team turns it into one written quote

Sourcing assistant Product briefing

This is a typical example of the style — we make it as OEM with your branding, as ODM from your own design, or customised in size, material and finish. You approve a sample before bulk production. Tell me what you want changed, roughly how many, and where it ships — I will build the specification our team quotes from.

3 free messages, no account needed to start. Starts your brief with this product attached

What buyers order most

The lines we lead with across the catalogue