Brief introduciton of sand casting:

Sand casting is perhaps the oldest and most commonly used type of metal forming in the marketplace today. It is capable of forming bothlarge and small parts and can be used for a number of different materials.

We have green sand castings, resin sand casings and water glass sand castings in both ferrous and non-ferrous materials.
Perhaps the most common green sand castings would be made from either grey iron or ductile iron. We can supply these castings fromapproximately 0.05Kg to approximately 15000 Kg and up to 5000mm x 2000mm x 1500mm in size for the largest part. Molding methodsrange from floor hand molding, jolt squeezer lines and automatic molding lines. With this variety of molding methods we are able toaccommodate the weight, size and quantity the customer requires.

Steel sand castings are available both as water glass sand castings and resin sand castings, and are available in plain carbon, alloy andstainless steels. In the category of steel sand castings the smallest available part would be approximately 1Kg while the largest would beapproximately 20 tons. Steel castings smaller than the 1Kg range would be madefrom investment casting(lost wax casting) method.

Non-ferrous sand castings are also available. The molding process used is green sand and we can accommodate requests forcastings weighing from 0.1 Kg to 100 Kg. The alloys that are available include copper base and aluminum base alloys.
First article layouts and spectrometer material certifications are provided with all first article samples. Specialized inspection reportscan be done per customer request.

A variety of secondary operations can be performed on all three types of sand castings. They include shot blasting, heat treatment, machining,surface treatment, assembly services and even custom packaging.

Materials and casting weights for different sand casting methods
Sand casting method	Green sand casting	Resin sand casing	Water glass sand casting
Materials used in different method	Grey iron,Ductile iron, Aluminum and copper alloy	Grey iron,Ductile iron, Carbon steel,Alloy steel, Stainless steel	Carbon steel,Alloy steel, Stainless steel
Weight range	0.05-15000Kg	0.5-18000Kg	5-20000Kg

Chemical composition of some materials:



Some sand casting process:



Machining and inspection equipments:



Some products:




Packing and customers:



Our advantages:

1. 20 years of manufacturing success in China and exporting experience worldwide
2.Global specialized producer of machined castings.
3. We combine our own resources with some other well-developed factories to fulfill a wide range of contract manufacturing capabilities. Working with one source, saves time and money.
4. Satisfied supplier of 7 big companies from North America and Europe.
5. Low cost mold materials and focus on efficiency offer a cost-effective solution to your metal component purchasing requirements.
6. Normal lead times range from 1 to 6 weeks for fully-machined components.
7. Strong capacity to help customers develop new projects.
8. Our sales department is 24 hours available in order to help our customers solve problems quickly.
Contact Donrex today and begin enjoying the benefits of high quality and low price products.

Basic Info Model NO. OEM Surface Treatment Spray-Paint Surface Roughness Ra6.3 Standard ASTM Certification ISO 9001:2008 Transport Package Bulk Packing Origin Shandong Product Description Customer Question & Answer Ask something for more details (0) Brief introduciton of sand casting:

Sand casting is perhaps the oldest and most commonly used type of metal forming in the marketplace today. It is capable of forming bothlarge and small parts and can be used for a number of different materials.

We have green sand castings, resin sand casings and water glass sand castings in both ferrous and non-ferrous materials.
Perhaps the most common green sand castings would be made from either grey iron or ductile iron. We can supply these castings fromapproximately 0.05Kg to approximately 15000 Kg and up to 5000mm x 2000mm x 1500mm in size for the largest part. Molding methodsrange from floor hand molding, jolt squeezer lines and automatic molding lines. With this variety of molding methods we are able toaccommodate the weight, size and quantity the customer requires.

Steel sand castings are available both as water glass sand castings and resin sand castings, and are available in plain carbon, alloy andstainless steels. In the category of steel sand castings the smallest available part would be approximately 1Kg while the largest would beapproximately 20 tons. Steel castings smaller than the 1Kg range would be madefrom investment casting(lost wax casting) method.

Non-ferrous sand castings are also available. The molding process used is green sand and we can accommodate requests forcastings weighing from 0.1 Kg to 100 Kg. The alloys that are available include copper base and aluminum base alloys.
First article layouts and spectrometer material certifications are provided with all first article samples. Specialized inspection reportscan be done per customer request.

A variety of secondary operations can be performed on all three types of sand castings. They include shot blasting, heat treatment, machining,surface treatment, assembly services and even custom packaging.

Materials and casting weights for different sand casting methods
Sand casting method	Green sand casting	Resin sand casing	Water glass sand casting
Materials used in different method	Grey iron,Ductile iron, Aluminum and copper alloy	Grey iron,Ductile iron, Carbon steel,Alloy steel, Stainless steel	Carbon steel,Alloy steel, Stainless steel
Weight range	0.05-15000Kg	0.5-18000Kg	5-20000Kg

Chemical composition of some materials:



Some sand casting process:



Machining and inspection equipments:



Some products:




Packing and customers:



Our advantages:

1. 20 years of manufacturing success in China and exporting experience worldwide
2.Global specialized producer of machined castings.
3. We combine our own resources with some other well-developed factories to fulfill a wide range of contract manufacturing capabilities. Working with one source, saves time and money.
4. Satisfied supplier of 7 big companies from North America and Europe.
5. Low cost mold materials and focus on efficiency offer a cost-effective solution to your metal component purchasing requirements.
6. Normal lead times range from 1 to 6 weeks for fully-machined components.
7. Strong capacity to help customers develop new projects.
8. Our sales department is 24 hours available in order to help our customers solve problems quickly.
Contact Donrex today and begin enjoying the benefits of high quality and low price products.

Qingdao Donrex Co., Ltd

Professional & Diligent

Keeping The Customers in mind!

DONREX, located in the beautiful city of Qingdao in China, is a professional, multi-facet manufacturer with its remarkable expertise in design, production, and export services. With the concept of "Professional & Diligent", DONREX is committed to be the leader of OEM&ODM metal parts and fabrication services, with Customer satisfaction, professional skills, and employee happiness, as its core values.

Established in 2005, DONREX was founded on the idea of Customer care-a people-oriented approach and continuous product improvement, which empowers the company with stable, healthy and rapid development. With a variety of mechanical standard and non-standard products manufacturing and export, our professional R & D team have the capability to meet various needs of different Customers, ranging from specification and concept development to prototyping and full-spectrum production. With rigorous and professional approach to every project, our Team studies the drawings and specifications to create precisely what the Customers need, on time and on budget. All of our Salespeople have mechanical engineering background, to provide efficient, accurate, and fast service for the Customers. This is the pride of DONREX!

Our core mission is utmost focus on Customer needs. In order to achieve this, DONREX remains heavily invested in technology, certifications, processes, inspections and quality evaluations to ensure our Customer receive the best mechanical products throughout the world.

DONREX products cover casting, forging, machining, profile extrusion and hardware rigging, etc...The portfolio breakdown is equated as follows:

· Casting, forging and stamping products: 55%

· Precise machined products: 30%

· Others (Specialty: ) 15%

We will not settle for anything less than 100% Customer satisfaction each and every time! Our products of high repute by a vast number of Customers, some of which include world-renowned brands like GE, BMW, IKEA, Wal-Mart, to name a few. We had the privilege of supplying precise machined products for China and Singapore high-speed railway project. Steel precise castings have been approved and will serve the Tokyo Olympic venues in the near future.

Customer- first, staff-oriented, honest and responsible approach is the cornerstone of who we are and what we do at DONREX, as we pursue world-class manufacturing excellence and mutually-beneficial and cooperative relationship with our Customers and Channel Partners. We greatly appreciate your time and look forward to serving you in the near future!