Category Archives: News

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We would like to wish all of our Customers in China a very Happy New Year.

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UGV Machine Range

The UGV range is an entry level machine popular with Universities and Technical Colleges. This machine is floor mounted and no special foundations are required.

Main Features:

  • Compact
  • Floor Mounted
  • Simple to use
  • Can be used in the production of rings, bushes, gear wheels and pipe flanges etc….



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New to the Centrifugal Casting Process?

New to the centrifugal casting process? Do you have any concerns with regards to how this process can benefit your organisation? Our technical team are experts in the design and manufacture of centrifugal casting machines. Our technical team are always on hand to provide support and guidance.

Below are a few examples of frequently asked questions which we receive:

Should I use a horizontal or vertical casting machine to manufacture my product?”

The general rule is if the diameter exceeds the length, vertical centrifugal castings are more suitable. However, there are exceptions, solid castings can only be made vertically. Some alloys are more suitable for vertical centrifugal casting and sometimes people just prefer either the horizontal or vertical method.

What information do you need to quote a suitable centrifugal casting machine?

We will send you a basic questionnaire which will detail all required fields, but principally the information we require is: I/D, O/D, Length, material and quantity of the castings which you wish to produce.

“We have no experience in centrifugal casting and are worried about our ability to manufacture a successful product”

Gibson Centri Tech Limited can help you with every stage of the process, from guiding you with the selection of your equipment, we can also offer layout drawings of your foundry as well as installing the equipment and providing “Know how” training.

“What are the latest developments in centrifugal casting machinery? “

Gibson Centri Tech Limited believe in continual improvement in our equipment. While the designs can trace their roots back thirty or forty years they have been endlessly improved to meet modern safety standards while embracing the latest technology. The level of  automation has increased and where appropriate incorporating servo drives and robotics.


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GCRH Range Of Centrifugal Casting Machines

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The GCRH Range of Centrifugal Casting machines can be supplied with a variety of mould/casting handling equipment, which will be tailor made to the customers exact requirements for production and budget.

GCRH Omicron Range:

  • Entry level machine
  • Compact
  • Used in the Production of light section tubular castings

GCRH R Range

  • Rigid fixed centre
  • Heavy duty
  • Ease of operation


GCRH A Range

  • Adjustable
  • Wide range of casting length and diameter
  • Semi Automatic
  • Used in the Production of reformer tubes and roll sleeves etc….


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Gibson Centri Tech Limited – Technical Assistance

Gibson Centri Tech Limited can off a range of services to aid the customer in their successful production of Centrifugal castings. We will advise from start to finish on the process, because even the smallest parameter change can lead to a successful casting. Our services range from support in the following areas and we can even offer technical assistance using third part equipment:

Equipment Selection 

New or existing, are you using the correct type of equipment to successfully produce your casting? For example some types of castings can only be successfully manufactured on a vertical style machine. You also need to ensure that the mould is safely and securely supported to ensure that there is a limited amount of vibration.

Equipment Selection:

New or existing, are you using the correct type of equipment to successfully produce your casting, for example some types of castings can only be successfully manufactured on a vertical style machine. You also need to ensure that the mould is safely and securely supported to ensure that there is a limited amount of vibration.

Mould Pre-heating and temperature: 

This is a critical area for centrifugal casting production as different alloys and different coatings require temperature adjustments and most importantly you must ensure that the mould is free from moisture. Correct temperature will reduce or eliminate pin holes in castings as well as aiding metal flow.


Mould cleaning is an area which can give you instant improvements and scrap reduction, but it is sometimes one of the most neglected areas of centrifugal casting production. Moulds internally should be free from carbon deposits, old mould coating and oil as these can all lead to coating flaking off and subsequently scrap castings. Care should also be taken with the pouring bush horn to ensure that it is free from metal splatter or loose refractory as these can be deposited in the centrifugal casting.

Mould Spraying Equipment: 

Automated spraying machines if set up correctly will accurately and evenly deposit mould coating on the mould surface offering full repeatability.  Automated spraying allows customers to reduce machining allowances speed up production, reduce scrap and stuck castings. Hand spraying will always be required for low volume and complex shapes, having the right equipment with correct parameters set is vital in achieving accurate spraying patterns.

Mould Coating:

Coating selection, there are plenty of different coatings available on the market we manufacture two ourselves Alumina (Trigex) and Silica (300/3) which has been successful with different alloys over many years, but we will use your coating selection or if no preference the best coating for your production which we will then optimise for your castings.

Mould being Sprayed

Mould being Sprayed


Casting Extraction: 

Push or pull system, there are many different ways to extract castings a lot depends on the size and quantity of the casting being produced. If a casting fails to extract you need to investigate the cause as it might not be the equipment it could be anyone of the processes leading up to extraction.

Casting Handling:

This area can save a lot of time, a lot will depend on quantity of castings and what further onward processing is required for example a robot could automatically load castings onto a conveyor of an in line shot blasting unit or even as simple as a gravity conveyor

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We would like to wish Everyone a very Happy New Year.


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Horizontal and Vertical Process – Centrifugal Casting

It is acknowledged that both Horizontal and Vertical Centrifugal Casting processes can be used with ferrous and non ferrous materials. The same machines can cast ferrous and non-ferrous, the only difference is some process features have to be tailored to suit the alloy such as:

  • Spinning speeds
  • Pouring rates
  • Mould temperatures
  • Molten metal temperatures
  • Mould Coating
  • Water Cooling

Horizontal Centrifugal Casting is best applied to castings of greater length than the diameter and which have cylindrical bore. This is why you will commonly find tubes between 300mm to 6000mm long. It is possible to create shaped casting horizontally using a shaped mould or sand inserts.


Vertical Centrifugal Casting on the other hand is commonly used for cylindrical shapes where the diameter exceeds the length or height of the casting one exception to this are steel mill rolls where using a roller guide system, casting with a longer length to the diameter are manufactured this is to allow the manufacture of solid castings.

It can also be used for complex castings shapes such as Ball Valves and Propellers.

Due to the gravitational pull while pouring the material a parabolic effect takes place in the bore, this can be altered by changing the speed for casting.


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Alpha – Gyra and Alpha Uni- Gyra Machine Range of Centrifugal Casting Machines

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This is the most popular series of Horizontal Machines manufactured by Gibson Centri Tech Limited. We can manufacture five basic sizes with an extensive selection of variations to suit individual specific requirements. Single or twin head machines versions are available.

The Alpha Uni – Gyra machine

This machine type is a high duty version of the Alpha – Gyra machines, having high capabilities with a range of optional production items including:

  • Programmable control unit.
  • Automatic mould coat spraying mechanical casting extraction, making it more suitable for mass production duties.
  • The twin head machines are best employed for medium to long production runs of cylinder liner castings of maximum 500mm internal diameter.


The Alpha – Gyra Machine

This machine is designed and manufactured to meet the requirements of one off, jobbing, medium to mass productions of cylinder castings for diesel and petrol engines, gear wheel blanks, high duty bushes for automotive and engineering duties and pump sleeves, in high duty nickel alloys.

What are the main features of the Alpha Machine Range?

  • Flange mounted mould
  • Easy to install & Operate
  • Low Maintenance
  • Reduced Noise
  • Flexible, Suitable for both
  • Used in the Production of cylinder liners, Valve Seals, Bushes and Warm Gear Blanks etc…..

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Christmas 2018

Gibson Centri Tech Limited will close for the Christmas Holidays on Friday 21st December 2018 at 12.00pm. We will return for Business on Wednesday 2nd January 2019 at 9.00am.

We would like to take this opportunity to wish everyone a very Merry Christmas and a Prosperous New Year.

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Happy Thanks Giving

Gibson Centri Tech Limited would like to wish all of our Customers in the United States of America a very Happy Thanks Giving.