Shaanxi Rongbao Machinery Electronics Co., LTD. specializes in manufacturing Gravity Casting Cover solutions using advanced aluminum alloy technology. Our ZL101A aluminum covers are engineered through gravity casting processes, delivering protective casings with exceptional dimensional accuracy and surface integrity. With 14 utility model patents and recognition as a National High-Tech Enterprise, we provide covers weighing 0.7kg with precision tolerances.
Our production capacity reaches 5,000 pieces for customized specifications. Export performance demonstrates reliability—70% of products serve international markets across the United States, Europe, and Japan. The manufacturing workflow integrates mold development, gravity casting, CNC machining, and shot blasting surface treatment, ensuring your protective components meet demanding industrial standards.

A product is a protective housing for mechanical parts, produced by pouring molten aluminium into permanent metal moulds by gravity force alone.
With this procedure coverings have smooth surface and good dimensional accuracy. Gravity casting is based on natural flow dynamics, not pressure based casting. The outcome is protective covers with higher density of material and structural integrity.
Covers protect delicate components of your equipment from contamination, impact and the environment. This method is especially applicable to Al alloys, which are light in weight and have high corrosion resistance.
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Parameter
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Details
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Application
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Gravity Casting Process
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Material
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ZL101A Aluminum Alloy
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Unit Weight
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0.7 kg
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Casting Method
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Gravity Casting
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Machining
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CNC Precision Machining
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Surface Treatment
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Shot Blasting
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Production Capacity
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5,000 pieces
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Customization
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OEM/ODM Available
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Certification
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ISO 9001:2015, ISO 14001, ISO 45001
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Packaging
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Wooden Box
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MOQ
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Approximately 100 pieces
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Origin
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Xi'an, China
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The production workflow ensures consistency and quality control at every stage.
Mold Preparation: Reusable metal dies are prepared according to your technical drawings or 3D models. Our mold manufacturing takes 15–25 days.
Gravity Casting: Molten ZL101A aluminum is poured into the mold cavity. Gravity fills the mold naturally, creating uniform wall thickness without external pressure.
Cooling & Solidification: The aluminum solidifies within the metal die, maintaining precise dimensions and smooth surfaces.
CNC Machining: Post-casting machining refines critical features, holes, and mounting surfaces to your exact specifications.
Shot Blasting: Surface treatment removes oxidation and creates uniform texture, improving adhesion for secondary coatings if needed.
Quality Inspection: Each Gravity Casting Cover undergoes dimensional verification and visual inspection before packaging.

Dimensional Accuracy: Metal moulds can be used to achieve tighter tolerances than sand casting processes. Your covers fit well no major secondary surgeries.
Surface Quality: Permanent moulds provide a bright, smooth surface that reduces friction and enhances the appearance of the product.
Material Properties: ZL101The aluminium alloy has great strength to weight ratio and innate corrosion resistance. Your components are protected in tough settings.
Cost Efficiency: The cost per unit can be lowered by using reusable metal dies for medium to high manufacturing runs. We complete our batches within 7-20 days.
Customisable Flexibility: Designs are customised to your drawings, specifications and application needs. Easily add custom elements to the moulding process.
Gravity casting is used to make protective covers for several industries.
Automotive Components: Aluminum's heat dissipation is used in gearbox systems, brake assemblies and sensor housings.
Industrial Machinery: This cover is used for equipment that requires dustproof or splash-proof protection to prolong the life of the components.
Electronics Enclosures: Circuit boards and control systems are protected by lightweight aluminium covers without adding a lot of weight.
Mechanical Drives: Ball screw covers, linear guide protectors and gearbox casings keep out contamination and maintain precision.
Our shared production capabilities minimise the need for various vendors to coordinate with each other.
You have one partner from mould design to the delivery of the finished component. This makes communication easier and shortens lead times.
Our ISO-certified management systems ensure constant quality of all production batches. Environmental and safety standards are in line with international regulations.
Get behind your production schedules with standard order lead times of 20-30 working days, with no delays. Customer feedback indicates our on-time delivery performance helps preserve your manufacturing continuity.
Technical support is not just for production. The Knowledge Center offers help on casting processes, material choices, and design optimisation.

Q: What minimum order quantity do you require?
A: Our standard MOQ is approximately 100 pieces, providing flexibility for both prototype runs and batch production.
Q: Can you customize cover dimensions and features?
A: Yes. We work from your drawings, 3D models, or sample parts to create custom tooling and specifications.
Q: What certifications do your products carry?
A: We hold ISO 9001:2015, ISO 14001, and ISO 45001 certifications. Product-specific certifications are available based on your market requirements.
Q: How do you ensure dimensional accuracy?
A: Permanent metal molds combined with CNC machining deliver precise tolerances. Each cover undergoes inspection before shipment.
Q: What is your typical production timeline?
A: Mold manufacturing requires 15–25 days. Batch production completes within 7–20 days after mold approval.
Q: Do you provide surface finishing options?
A: Standard treatment includes shot blasting. Additional finishes such as anodizing or powder coating are available upon request.
Ready to discuss your protective Gravity Casting Cover requirements? Reach out to steve.zhou@263.net with your specifications for prompt response.
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