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Grey Iron Fitness Equipment Dumbbell

Grey Iron Fitness Equipment Dumbbell

Grey Iron Fitness Equipment Dumbbell

OEM factory pro style free weight fitness weight lifting grey iron cast dumbell

Casting Metals: Grey Cast Iron,GG15, GG20, GG25

Casting Manufacturing: Sand Mould Casting +Powder Coating

Application: Exercise

Weight: 1-16 kg

Available Surface Treatment:  Painting, Anodizing, Passivation, Electroplating, Zinc-plating, Hot-Zinc-Plating, Polishing, Electro-Polishing, Nickel-Plating, Blackening, Geomet, Zintek

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The Best Popular Dumbbell

OEM & ODM Cast Iron Dumbbell from Hengchang Foundry

The OEM grey iron dumbbells activate a number of different muscles and stimulate muscle growth. They can help improve both muscle force and flexibility. They can promote coordination and stability for muscles and joints.

Hengchang is a OEM iron dumbbells manufacturer, produce different custom shell moldidng dumbbells. Shell molding is also known as shell-mold casting, is an expendable mold casting process that uses resin covered sand to form the mold. As compared to sand casting, this process has better dimensional accuracy, a higher productivity rate, and lower labour requirements. It is used for small to medium parts that require high precision. Shell moulding was developed as a manufacturing process during the mid-20th century in Germany. It was invented by German engineer Johannes Croning.Shell mould casting is a metal casting process similar to sand casting, in that molten metal is poured into an expendable mould. However, in shell mould casting, the mould is a thin-walled shell created from applying a sand-resin mixture around a pattern. The pattern, a metal piece in the shape of the desired part, is reused to form multiple shell moulds. A reusable pattern allows for higher production rates, while the disposable moulds enable complex geometries to be cast. Shell mould casting requires the use of a metal pattern, oven, sand-resin mixture, dump box, and molten metal.

Shell mould casting allows the use of both ferrous and non-ferrous metals, most commonly using cast iron, carbon steel, alloy steel, stainless steel, aluminium alloys, and copper alloys. Typical parts are small-to-medium in size and require high accuracy, such as gear housings, cylinder heads, connecting rods, and lever arms.

The shell mould casting process consists of the following steps:

Pattern creation - A two-piece metal pattern is created in the shape of the desired part, typically from iron or steel. Other materials are sometimes used, such as aluminium for low volume production or graphite for casting reactive materials.

Mold creation - First, each pattern half is heated to 175-370 °C (350-700 °F) and coated with a lubricant to facilitate removal. Next, the heated pattern is clamped to a dump box, which contains a mixture of sand and a resin binder. The dump box is inverted, allowing this sand-resin mixture to coat the pattern. The heated pattern partially cures the mixture, which now forms a shell around the pattern. Each pattern half and surrounding shell is cured to completion in an oven and then the shell is ejected from the pattern.

Mould assembly - The two shell halves are joined together and securely clamped to form the complete shell mould. If any cores are required, they are inserted prior to closing the mould. The shell mould is then placed into a flask and supported by a backing material.

Pouring - The mould is securely clamped together while the molten metal is poured from a ladle into the gating system and fills the mould cavity.

Cooling - After the mould has been filled, the molten metal is allowed to cool and solidify into the shape of the final casting.

Casting removal - After the molten metal has cooled, the mould can be broken and the casting removed. Trimming and cleaning processes are required to remove any excess metal from the feed system and any sand from the mould.

Examples of shell moulded items include gear housings, cylinder heads and connecting rods. It is also used to make high-precision molding cores. 

Grey & ductile iron casting

- weight: 0.5-2000KG

- technology: Green sand, resin sand, vacuum casting, shell molding

- production line: DISA line, auto molding line, manual molding machine

- application: Pump, valve, automobile, agriculture, municipal, sports, metallurgy other mechanical field

 

Vacuum moulding line:

- available material: grey iron, ductile iron and alloy steel

- flask dimension:  1,000 mm × 800 mm × 500 mm

- weight scope: 0.5-100kgs 

 

Resin Sand moulding line

- available material: grey iron, ductile iron and steel

- flask dimension: 4200*4200*2000mm

- weight scope: 10-2000kgs

 

Moulding Autoline

- available material: grey iron, ductile iron

- flask dimension:

- 508*609*250mm

- 350*450*150mm

- 400*500*180mm

- weight scope:0.2-50kgs

Product details:

 

Material Gray iron ,ductile iron, brass, carbon steel, copper, aluminum, alloy steel, etc
standard ASTM, ASME,DIN, EN, BS, JIS, ANSI, AS,GB etc.
process Green sand casting ,resin sand casting, shell molding casting,vacuum casting, continuous concast, machining
Weight range 0.5-2,000kg
Surface treatment painting, polishing, heat treatment, annealing or galvanization etc.
Size and design As per the customer's drawings, samples and requirements
Machining complete machining such as CN machining,CNC lathe,CNC milling,drilling etc.
Packing As per customers' requirements
Inspection in-house or the third Party

 

Our Sand Casting Capabilities  
Description Molding by hand & semiautomatic machine
Max size of Castings 3,000 mm × 1000 mm × 500 mm
Casting Weight Range 0.5 kg - 2,000 kg
Annual Capacity 4,000 tons - 5,000 tons
Casting Tolerance On Request or Standard (ISO8062-1994 or BS6615:1996)
Molding Materials Green Sand, Resin Coated Sand,precoated sand
Casting Metal & Alloys Gray Iron, Ductile Iron, Al Alloys, Brass, Bronze,Aluminum...etc. 

 

Our Advantages in Sand Casting Field:

• Over 15 years of experience in sand casting, shell molding casting and machining technology.
• Dimensionally accurate cores for complex internal contours.
• Strictly control the raw materials.
• Quality management throughout the production process and maximum process reliability.

Available Grade of Gray Iron in our Foundry:  FC150, FC200, FC250, HT150, HT200, HT250; EN-GJL-150, EN-GJL-200, EN-GJL-250, GJL-250

Hengchang are producing various grey iron casting products for overseas customers in Japan, USA, Canada, Germany, Danmark, Russia and Dubai.

 

Here are production process photos:

Fitness Equipment Dumbbells

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