Rail Shoulder-Rail Cast Insert

Rail shoulder

    All products is offered with 3 years quality guarantee, and after-sales service is offered during the whole product application life.

    We offer qualified products with drawing design, technology optimization, product performance testing,etc.

    With the advanced production lines and mature management system, we are able to produce with the fastest speed.

    We will give quotation within 24 hours, with the most competitive price. Send Us an Inquiry Soon!

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How to make the Rail Shoulder? – Lost Foam Technology

Lost Foam is a unique casting process which is ideally suited to the manufacturing  of  geometrically  complex  parts  with  one  cast.  The main  characteristic of the process – as already stated in  the name “Lost Foam” – is the use of “lost” patterns made of organic foam materials. The patterns are inserted into a mould material that is free of bonding agents by using vibration compression. During casting, the pattern is then pyrolysed by the molten steel, thereby creating a hollow space which the molten steel fills up. In this way, an exact metallic cast copy of the pattern is created. In addition to the possible geometric complexity, Lost Foam cast parts distinguish themselves through their excellent surface qualities and dimensional accuracy.

Lost Foam Procedure

Process 1: Pattern Creation

Process 2: Pattern Clustering

Process 3: Coating

Process 4: Drying

Process 5: Compaction

Process 6: Casting Molten Metal

Process 7: Cooling And Extraction

Process 8: Separation

Process 9: Shot Blasting And Fettling


GK GROUP, which belongs to Nanchang Railway Buareau, is an enterprise manufacturing railway fasteners, whose products covering fields of railway, urban rail, mining, ect.
There are two factories located in Zhangzhou Fujian, which are all CRCC and ISO certificated, with total area about 320,000 ㎡, workers over 300, and annual sales volume over RMB 200,000,000.

Founded in 1960, With over 50 years specializing in railway fasteners, GK has served many demanding markets worldwide, including USA States, Chile, Argentina, Ecuador, Brazil, Thailand, Indonesia, Malaysia, Vietnam, Spain, Italy, Romania, England, Kazakhstan, etc.

What do we offer?

We have 4 automatic clip production lines with robot hands, which have the production volume for 60,000 pieces clips per day.
Avantages for robot hands production:

– Guarantee the dimensions stability
– Increase the quality
– Maximum the production volume
– Reduce labor cost

With the advanced forging production lines, we are able to produce screw spikes, rail bolts, rail clamp, rail anchor, and all other forged products.

Our advantages:

– Advanced production equipment, mature production technology and perfect quality assurance system.
– High production volume, able to produce with the fastest speed.
– Mature management system with lowest cost, which guarantee the quality stability.
– Competitive price with best service.

We use lost foam casting process, the advantages as below:

– Without Limits.Lost Foam enables geometrically complex cast parts to be created with the highest quality.
– Dimensionally exact. – High dimensional accuracy and low tolerances.
– Better Surface. Surface smooth and less flaws.
– Without subsequent machining. Lost Foam is done without a core and without burrs so that there is almost no subsequent fettling work.
– Weight reducing. Lost foam enables the creation of thin-walled, filigree cast product.
– Environmentally friendly. Energy efficient casting process with low emissions and closed mould material circulation.

With advanced injection machines, we are able to offer:

– Angle plate or rail insulator
– Rail pad
– Plastic dowel
– Other products according to customer’s needs

We are able to do various surface treatment with the most advanced technology. All the surface treatment is eco-friendly and finished in our own factory.

– Electrostatic spraying for rail clips. Anti-corrosion for 2 years.
– Darcromet for most rail fasteners. Anti-corrosion for 10 years.
– Zinc-nickel alloy co-permeation for most fasteners. Anti-corrosion for 20 years.

Our testing center the most advanced testing equipment:

– Universal testing machine
– Spectroscopic test machine
– Hardness Test machine
– Cold Bending Test Machine
– Fatigue test equipment for clip
– Fluorescent magnetic particle inspection machine
-Salt spray test equipment

Our Certificates

With ISO and CRCC certificated, Guokeng tries its full efforts to save cost for each client by upgrading our Production Equipment & Inspection Facility & Quality Management System to be more efficient, economy, and also with good quality control capacity. Quality and reliability are always our culture. We will never stop upgrading and developing, and will spend our whole life in delivering best quality and service.

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