Sales +86 158 6793 6599 guoyangjishu@cnzjgy.com No. 178 Xueyuan North Rd, Yongkang, Zhejiang, China
Zhejiang Guoyang Electromechanical Manufacturing Co., Ltd. EN / 中文

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Equipment and capacity, four processes under one roof

From ingot melting and sand-core making through gravity and high-pressure casting, T6 heat treatment, precision machining and inspection, every stage runs on our own site. 96 vertical drilling and milling centres, 25 gravity casting machines, 10 die-casting machines from 280 to 1200 t and 12 core shooters. No key process is subcontracted, so delivery and quality trace back to heat and lot.

96Machining centres 25Gravity casters 10Die casters 12Core shooters 15Inspection systems

Site / Site & capacity

Site, scale and design capacity

The plant is at No. 178 Xueyuan North Road, Yongkang Economic Development Zone, Zhejiang. The site covers 30,000 m² with more than 60,000 m² of factory floor space. The 25,049 m² No. 3 plant, completed in 2022, houses casting, machining and storage. The company employs more than 260 people and reported sales of RMB 125 million in 2025.

The company profile gives a design capacity of 1.1 million small castings and 600,000 large castings per year, about 142,000 pieces a month. Design capacity is not the same as delivered capacity; scheduling, tooling and order mix decide the actual figure.

Size range: sand cores 0–1,500 mm (12 core shooters, 5 of them large); gravity-cast aluminium parts 0–1,500 mm (25 gravity casting machines). Unusual structures can be run on modified machines.

Site area
30,000m²
Site footprint
Floor space
60,000+m²
Total factory floor space
No. 3 plant
25,049m²
Completed 2022
Roof solar
333kWp
Distributed rooftop PV
Employees
260+people
Current headcount
2025 sales
RMB 125million
Sales in 2025
Small parts
1.1M pcs/year
Design capacity · small castings
Large parts
600K pcs/year
Design capacity · large castings

Equipment list / By process

Equipment, grouped by process

Counts, models and installation years are stated by the company. Tonnage, stroke, table size and accuracy are held in the asset register; where a figure is not verified, this page leaves it out rather than publishing an estimate as a specification.

Casting

Casting · 35 units
EquipmentModel / specificationQuantityInstalledMain use
Gravity casting machine WFFJ160612 25 2018–2024 Cylinder heads, intake manifolds, EGR seats and other gravity castings
High-pressure die-casting machine DC280T–DC1200T; incl. Yizumi DM800SM 800T 10 2018–2024 Oil pans, gear chambers, covers and brackets
Row of gravity casting machines in the Guoyang foundry
Gravity casting line · 25 machines
Die-casting cell at Guoyang, machine and control cabinets
Die-casting cell · 10 machines

Cores and sand

Cores & sand · 27 units
EquipmentModel / specificationQuantityInstalledMain use
Core shooter FSV-750 and others; 5 large 12 2021–2024 Sand-core production
Sand mixer S1050 15 2018–2024 Moulding-sand preparation

Melting and heat treatment

Melt & heat treatment
EquipmentModel / specificationQuantityInstalledMain use
Horizontal molten-aluminium refining unit — 3 2021 Degassing and cleaning of every melt
T6 heat-treatment line Solution furnace + aging furnace + quench tank 1 set 2018 Solution, quench and aging of aluminium parts

Surface treatment

Surface · 6 units
EquipmentModel / specificationQuantityInstalledMain use
Shot blaster P8560 4 2018–2024 Casting surface cleaning
Washing and surface-treatment line QX1250 1 line 2018 Washing and surface treatment
Organic impregnation line — 1 line — Porosity sealing

Machining

Machining · 122 units
EquipmentModel / specificationQuantityInstalledMain use
Vertical drilling and milling centre V850 96 2018–2022 Cylinder heads, covers, brackets and other precision parts
CNC lathe CQ520 8 2018 Turned parts
Milling machine T1000 15 2018–2020 General milling
Tapping centre HT600 3 2022–2023 Drilling and tapping of small parts
Machining floor at Guoyang, rows of vertical drilling and milling centres
Machining floor · vertical drilling and milling centres

Inspection

Inspection · 15 types
EquipmentModel / brandQuantityInstalledMain use
Coordinate measuring machine NC8107 · Qingdao Leadon in service 2018 Dimensions and geometric tolerances
X-ray inspection system XT7600 · Yifangda in service 2024 Internal casting defects
Optical emission spectrometer MAX LMD04 · Shanghai Spike in service 2018 Aluminium melt chemistry
Second optical emission spectrometer VL-4000 · Wuxi Chuangxiang in service — Aluminium melt chemistry, backup unit
Hydrogen content tester VF053 · Zhejiang Wanfeng in service 2020 Hydrogen content in the melt
Surface roughness tester XH260 · Shanghai Xinhuan in service 2022 Surface roughness
Ultrasonic thickness gauge ST-200 · Yongkang Siwei 2 units — Wall thickness, as-cast and after machining
Brinell hardness tester HB-3000 · Laizhou Dechuan in service 2018 Casting and post-heat-treatment hardness
Leeb hardness tester XH960 · Hangzhou Shiyi 2 units — On-site hardness and large parts
Electronic universal testing machine WDW-50 · Jinan Sida in service 2018 Tensile strength and elongation
Metallurgical microscope PRJX41 · Shandong Zhongke Purui in service 2018 Microstructure and modification
Salt spray chamber YWX/Q-1000 · Ningbo Benyang Dacheng in service 2018 Coating corrosion resistance
Coated sand tester YJ48S · Sanmen Sante 2 units 2018 Coated-sand properties
Cleanliness tester BH-500 · Ningbo Benyang Dacheng in service 2018 Part cleanliness
Pneumatic gauge LZA-ML · Yongkang Lantian in service — Batch bore gauging
Granite inspection table 1000 × 1000 mm in service — Inspection datum surface
Coordinate measuring machine in the Guoyang inspection room
CMM · Qingdao Leadon NC8107
X-ray inspection machine in the Guoyang inspection room
X-ray inspection · Yifangda XT7600

Basis: equipment counts, models and installation years follow the company's June 2026 equipment list. Accuracy figures for inspection equipment remain subject to calibration certificates and the asset register.

Finishing / Impregnation

Organic impregnation line: sealing porosity inside the casting

Used where parts must hold pressure or pass a leak test. Whether a part is impregnated, and after which operation, follows the drawing and the customer standard; it is not a fixed step for every casting.

Guoyang's organic impregnation line: stainless-steel impregnation vessels, washing tanks, curing unit and operating platform
Organic impregnation line · vacuum impregnation, washing and curing stations, photographed in our plant

Solidification leaves microscopic shrinkage porosity in a casting. On cylinder heads, intake manifolds and valve bodies, where leak-tightness matters, a visual or dimensional check cannot show whether pores are connected. Vacuum impregnation draws resin into those pores and cures it, closing the paths that could leak.

  1. 01 · VacuumParts go into the impregnation vessel; a vacuum draws air out of the pores.
  2. 02 · ResinWith the vacuum held, organic impregnant (resin) is admitted and enters the pores.
  3. 03 · WashSurface residue is washed off so it cannot affect later machining or appearance.
  4. 04 · CureHeat turns the resin solid, sealing the pores.

Impregnant grade, vacuum level, cure temperature and cycle time follow the supplier's process documents and the work instruction; values are held in the asset register, not estimated here.

Process chain / One line

From ingot to carton, one line

The two highlighted stages are the ones most aluminium casting shops subcontract. We do not. Injection moulding runs on a separate line; this page covers aluminium processes only.

Ingot melting→ Degassing→ Sand cores→ Gravity / HPDC→ T6 heat treatment→ CNC machining→ Final inspection→ Packing

Why it matters: casting, heat treatment and machining share one site. Tool changes, repairs, trials and first-off approval stay in-house; if a dimension or internal defect is disputed, we can go straight back to the heat, the mould and the machining parameters instead of chasing a subcontractor's records.

Inspection / Three checks

Three checks: chemistry, internal, dimensional

Inspection sits on the same site as casting and machining. Test items, sampling frequency and acceptance criteria are agreed at sample stage against the customer drawing and standard.

Chemistry

Melt chemistry

Every heat is sampled and checked on an optical emission spectrometer before pouring; a heat that fails the grade is isolated.

MAX LMD04 · Shanghai Spike
Internal

Internal defects

Key parts are X-ray inspected to the customer requirement for porosity, shrinkage and inclusions; results are recorded by lot.

XT7600 · Yifangda
Dimension

Dimensions & GD&T

First-off, patrol and final checks run to drawing; critical bores, flatness and position are verified on a CMM.

NC8107 · Qingdao Leadon

System: IATF 16949:2016, NQA certificate T86992 / IATF 0502960, valid 28 Feb 2024 to 27 Feb 2027; scope: manufacture of injection-moulded parts and aluminium castings (product design excluded), covering Buildings 1 and 2, No. 178 Xueyuan North Road. Fifteen inspection instrument types are listed above.

Ask for the asset list, or send a part

We can provide the in-service equipment list by process, or you can send a drawing directly. Please state part, material, annual volume and critical dimensions, and we will propose a route on the equipment we actually run.