Custom aluminum die casting
Motor housings, covers, structural parts, electrical box covers, and other drawing-based castings for OEM and industrial assemblies.
Jiangyin Weiren Aluminum | Custom manufacturing
Aluminum alloy casting.
Precision metal machining.
Aluminum alloy casting is our specialty: high-pressure die casting, low-pressure casting and gravity casting for complex custom parts. For applicable A356 programs, tensile strength reaches 290–320 MPa. We also provide metal machining and precision CNC machining as standalone services, as well as finishing our own castings.
ISO9001Certified since 2018
IATF16949:2016Automotive quality system
20,000+ sqmManufacturing facility
40 yearsManufacturing experience
Built for repeatable supply
Specialists in aluminum casting. A manufacturing partner for precision metal parts.
Our core expertise is aluminum alloy casting across a wide range of part types, with high-pressure, low-pressure, gravity and vacuum gravity casting options. Mold design, heat treatment and inspection support strength and dimensional requirements. Our metal machining and precision machining services also support independent projects beyond aluminum castings. Send your drawing, material grade and performance requirements for technical review.
Common RFQs
Aluminum casting and machining projects buyers ask us to review
Explore our aluminum casting and metal machining services. The gallery examples do not limit what we can review; the exact answer still depends on drawings, alloy, tolerance, finish, annual volume, and inspection requirements.
Low-pressure and gravity cast aluminum parts
Wheel hubs, flanges, guide wheels, and larger aluminum components where process control matters more than catalog availability.
Precision metal machining
Standalone metal machining and precision CNC services, plus post-casting machining of mounting faces, sealing surfaces, bores and threads. Materials and part requirements are reviewed to your drawings.
Industrial cooling and energy components
Impellers, ventilation blades, cooler housings, wind power structures, marine hydraulic parts, and similar complex aluminum components made to buyer drawings.
Product samples
Aluminum casting and machined part sample gallery
Review current samples before sending an RFQ for custom aluminum castings, CNC machined aluminum parts, wheel hubs, housings, flanges, guide wheels, cooling components, or structural castings. These photos show representative work only; Weiren can evaluate many other complex aluminum alloy components from customer drawings, including precision features, aluminum alloy forged parts, and steel forged parts.
27current product samples
27shown in this view
±0.02 mmachievable machining tolerance
Company document
Download the detailed company profile.
Detailed company introduction covering product process control, heat treatment, surface treatment, product inspection, and certifications.
Manufacturing capability
Aluminum casting expertise. Precision metal machining capability.
A factory profile for buyers who need process control, sample review, and repeat production instead of a trading catalog. Actual machining precision can be controlled to ±0.02 mm for suitable features, and A356 aluminum can achieve actual tensile strength of 290-320 MPa according to heat treatment, part structure, and inspection requirements.
Casting & tooling
From mold to aluminum casting
- Die-casting machine tonnage
- 280 / 500 / 800 / 1,600 t
- Holding furnace capacities
- 500 kg / 800 kgFurnace capacities, not individual casting weights.
- Low-pressure casting diameter
- Up to 1,200 mm (47.24 in)
- Minimum casting weight
- Greater than 100 g (3.53 oz)
- Minimum wall thickness
- Down to 0.5 mm (0.020 in)Vacuum gravity casting; subject to geometry and process review.
- A356 tensile strength
- 290–320 MPa (42.1–46.4 ksi)For applicable casting and heat-treatment programs; verification requirements are agreed per project.
- Mold design & manufacturing
- AvailableTooling requirements reviewed against your part drawings.
CNC machining
Precision machining across metal parts
Standalone metal machining projects and post-casting precision work, reviewed to your material and drawing requirements.
- CNC equipment
- 3-axis / 4-axis / 5-axis
- Maximum machining travel
- 800 mm (31.50 in)Machine travel; usable part size depends on setup and fixturing.
- Achievable machining tolerance
- ±0.02 mm (±20 µm)For suitable features; tolerances are agreed during drawing review.
These capabilities depend on alloy, part geometry, tooling and process selection. Individual limits may not be achievable together. Final dimensions, wall thickness, tolerances and inspection requirements are confirmed during technical review. Imperial values are approximate.
Core Processes
- High-pressure die casting, low-pressure casting, gravity casting and vacuum gravity casting
- Alloy addition, degassing, spectral element analysis, and sample retention
- T6 heat treatment with recorded process data for review
- 3-axis, 4-axis and 5-axis CNC equipment and precision CNC machine tools
- Mold design and manufacturing capability
- In-house paint shop
- Drawing-based review for complex aluminum structures, aluminum forgings, and steel forgings
- Achievable machining tolerance of ±0.02 mm for suitable features
Raw material control
Melting and refining
Casting
Heat treatment
CNC machining
In-house paint shop
Final inspection
Quality and traceability
Inspection equipment buyers can ask to review.
For aluminum casting RFQs, good samples are not enough. Buyers usually need alloy checks, dimensional reports, mechanical test data, and a clear route for finding problems before parts ship.
Ask for capability documentsSpectrometerAlloy element verification
X-RayInternal flaw detection
Coordinate Measuring Machine (CMM)Measurement range up to 1,500 mm (59.06 in).Reported measurement error: 2 µm. Applicable measurement conditions are reviewed with your inspection requirements; this is not a part machining tolerance.
Tensile testingMechanical performance checks
A356: 290-320 MPaActual tensile strength range for applicable aluminum alloy programs
±0.02 mmAchievable machining tolerance for suitable features, subject to drawing review
Hardness testingBrinell and Rockwell capability
Salt sprayCoating and surface validation
1000x German ZEISS metallographic microscopeMaterial structure review
MetallographyMaterial structure review
Process recordsBatch reliability and traceability
Industries and customer references
Complex aluminum parts for mobility, energy, marine, cooling, and industrial equipment
The applications below show where our current sample parts are used, but they are not the boundary of our manufacturing scope. Customer and supplier names are shown as text references from the supplied company presentation. No logos are used.
EV and two-wheel mobility
Electric motorcycle wheels, electric vehicle hubs, scooter and motorcycle components.
Bosch (Ningbo) e-Scooter Motor Co., Ltd. | Bafang ElectricAutomotive and new energy vehicles
Engine housings, covers, guide wheels, and structural aluminum components.
BMW supplier reference | Tesla supplier reference | BYD supplier referenceIndustrial equipment and wind power
Wind power structural parts, ventilation parts, cooling housings, and coupling components.
Reich Drive Systems | Kruger ventilation systemsMedical, marine, and specialty systems
Medical tabletops, yacht hydraulic unit parts, and precision cooling or impeller components.
Siemens supplier reference | Suzhou Huaya IntelligenceCompany profile
Aluminum casting specialists and precision metal machinists in Jiangyin, China.
Jiangyin Weiren Aluminum integrates R&D, design, manufacturing, and sales. The company expanded into a new factory in Huangtang Industrial Zone, Xiake Town, Jiangyin in 2012, covering 20 acres with more than 20,000 square meters of building area.
The factory base includes die-casting machines, low-pressure casting machines, gravity casting machines, heat treatment equipment, CNC machining centers, precision CNC machine tools, an in-house paint shop, and a physical and chemical inspection room. North American buyers can send drawings for castings, machined parts, coated parts, complex aluminum alloy structures, aluminum alloy forged parts, steel forged parts, or assemblies that need inspection records before shipment.
Request for quote
Send your aluminum casting or metal machining drawings.
For a faster technical review, include the part application, alloy or material standard, tolerance notes, inspection requirements, target annual volume, and whether 2D drawings or 3D files are available. You can select drawing files, STEP files, or images in the RFQ form; when the email window opens, attach the selected files before sending. If your part is not shown in the sample gallery, choose the other-products option below.
Lead times, production quantities and available capacity depend on part complexity and the required manufacturing process. We confirm these details with you by email after reviewing your drawings and project requirements.