Ningbo Dinghong Mould Co., Ltd. was established in 2013. （Yuejin Mould was established in 1998）It covers an 20 mu and located at No. 6 Yantanghe Road in the high-end mold park of Daqi Street, Beilun District, Ningbo City, Zhejiang Province, near the Beilun Port, the first largest port in China, with highly developed transportation which bring us much convenience.
As China Die Casting Photovoltaic Parts Manufacturers and Die Casting Energy Storage Parts Manufacturers, the company is integrated with mold design, manufacturing, die-casting, finishing production and trade, mainly producing auto parts, household appliance parts, telecommunication parts and other related aluminum alloy products. The company has been serving the automobile industry and famous OEMs, with strong technical force and advanced standardized system management to ensure the quality of each mold and die casting product.
In 2017, the company passed (ISO9001 and IATF16949) quality management system certification, with perfect testing equipment and sound quality control system. The marketing network covers China, South America, Southeast Asia and other countries, and we will develop EU and other markets one after another to increase the company's sales revenue.
The company has its own design team and advanced software, hardware equipment and systems. The company has realized the prior visualization analysis of mold design through mold flow analysis software. We make full use of our own technical strength, combined with the analysis of industry experience, quickly to provide customers with reliable mold design solutions.
Ningbo Dinghong Mould Co., Ltd. (Yuejin Mould, founded in 1998) leverages over two decades of mold manufacturing experience to establish a full-chain technical process system covering mold design, die casting, precision finishing, and quality inspection. With "visual analysis + systematic management and control" at its core, the company ensures the efficient and reliable delivery of every mold and every aluminum alloy product.
Information from Marketing Dept.
Technical Negotiation
Summary of Negotiation
Client's Confirmation
Preliminary Design
Client's Confirmation
Offer from MarketingDept.
Project Launch
Establishment of Project Team
Mould Flow Analysis
Modification of Design Proposal
Structural Design
Review and Approval of Design
Client's Confirmation
Materials Procurement
Parts Design
2D Drawings
3D Modelling
Review and Approval by R&D Dept. Manager
Issuing & Controlled
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READ MORENingbo Dinghong Mould Co., Ltd. is a China-based Die Casting Photovoltaic, Energy Storage And Charging Parts Manufacturer serving global B2B buyers. We integrate mold design, die casting, precision finishing and export in one facility, producing aluminum alloy housings, plates and boxes for PV inverters, battery energy storage cabinets and EV charging equipment.
As a Die Casting Photovoltaic,Energy Storage And Charging Parts Manufacturer, we match product configuration to the application, operating limits, interfaces and acceptance criteria defined for each project.
Our photovoltaic, energy storage and charging parts family covers the structural and thermal-management castings that sit inside power conversion and battery equipment. Each part is developed from the customer's 3D data, with mold flow analysis used before steel is cut to confirm filling, cooling and shrinkage behavior.
The range is built around three product types that we produce as standard configurations and adapt to project requirements:
Enclosure bodies for string and central inverters, cast with integrated cooling fins, mounting bosses and sealed cable entries.
Magnetic-component and filter enclosures for charging modules and power stages, with wall thickness controlled for shielding and heat paths.
Flat structural and cold-plate type components for battery racks and PCS units, where flatness and rib stiffness drive the design.
These castings operate in outdoor cabinets, rooftop arrays, containerized storage and charging stations, so the design brief usually combines mechanical load, sealing, corrosion exposure and heat dissipation. We match material and process route to that combination rather than applying one default specification.
Where a project also needs adjacent structural or new-energy castings, our Die Casting Structural Parts and Die Casting New Energy Parts ranges share the same tooling, casting and inspection flow.
Aluminum alloy selection is driven by strength, thermal conductivity and castability. We confirm the alloy grade and heat-treatment condition against the mechanical and thermal duty of the part before releasing the mold design.
| Specification Area | What We Confirm With You | Typical Project Input |
|---|---|---|
| Alloy and temper | Grade, heat treatment, conductivity target | ADC12, A380, AlSi10MnMg class alloys |
| Wall thickness | Minimum and nominal wall, rib ratios | 2.5–5 mm nominal, thicker at bosses |
| Dimensional accuracy | Datum scheme, GD&T, machining allowance | Critical bores and sealing faces machined |
| Sealing and flatness | Gasket or O-ring interface, leak test method | IP-rated enclosure requirements |
| Surface finish | As-cast, machined, passivation or coating | Powder coat, anodize, chromate |
Dinghong Mould was established in 2013, building on Yuejin Mould's experience since 1998. Our Beilun facility integrates mold design, manufacturing, die casting, finishing and trade, supported by high-precision CNC machining centers, large-scale EDM equipment, full-tonnage die-casting machines and automated trimming lines.
Mold flow analysis is applied during the design phase to simulate filling, cooling and stress distribution, so potential defects are addressed before the first trial shot. This shortens development cycles and reduces trial-and-error cost on the customer side.
For parts that require post-cast machining, we machine sealing faces, bearing bores and threaded features in-house, then route the part through inspection before packing.
We have held ISO 9001 and IATF 16949 certification since 2017, with an incoming, in-process and outgoing inspection system. Inspection equipment includes CMM, X-ray flaw detection and spectrometry, and results are recorded per batch.
Acceptance criteria, sampling plans and inspection reports are agreed during the project kickoff so that the first article and subsequent lots are measured against the same standard.
We configure each part around the mechanical interface, the thermal path and the assembly sequence of the customer's equipment. Options that we routinely discuss include:
Our engineering team works from the customer's 3D model and 2D drawing, and can also support part design where the concept is not yet finalized. Tool development, tool building and parts production are handled as one continuous service.
To prepare a reliable mold design and quotation, we work from the following project inputs. Where a value is not yet fixed, we agree on the assumption and record it in the proposal.
| Input | Why We Need It |
|---|---|
| 3D model and 2D drawing | Defines geometry, datums, tolerances and machining allowance |
| Alloy and heat treatment | Sets mechanical and thermal performance |
| Annual volume and batch size | Drives mold cavitation and machine selection |
| Surface treatment and color | Determines finishing route and masking |
| Inspection and acceptance criteria | Aligns first article and lot inspection |
| Packaging and delivery destination | Defines packing method and shipping route |
Molds are built with replaceable inserts and standard components where the part geometry allows, so wear-prone areas can be serviced without remaking the whole tool. We keep mold records, including design revisions and inspection data, to support future maintenance and repeat orders.
For production parts, we can supply replacement castings from the same tooling and maintain the agreed inspection routine across repeat batches.
We work with common die-casting aluminum alloys such as ADC12 and A380, and with higher-strength grades where the structural or thermal duty requires them. The final grade and heat treatment are confirmed against the mechanical and conductivity targets of the part.
Yes. Fins, cooling channels and cold-plate features are designed into the casting and reviewed through mold flow analysis to confirm filling and cooling before the tool is cut. Machined sealing faces and bores are completed in-house after casting.
We control the process through mold design, gating and cooling layout, and verify internal quality with X-ray inspection on the agreed sampling plan. Critical sealing faces are machined and checked against the drawing.
A 3D model and 2D drawing, alloy and heat treatment, annual volume and batch size, surface treatment, inspection criteria, and packaging and delivery destination. If some values are not yet fixed, we agree on assumptions and state them in the proposal.
Yes. We provide part design support, tool development, tool building and parts production as one service, so the same team carries the project from mold design through die casting, finishing and inspection.
Packing is configured to the part geometry and the customer's line-side or warehouse requirements. Our facility is located near Beilun Port in Ningbo, which supports efficient export logistics to China, South America, Southeast Asia and other markets.
Sun Yuejun: +86-13806631860
Wang Shiyong: +86-15958891460 / 15058297768
Dove Yao: +86-18625086675
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