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Officine Meccaniche Belloi & Romagnoli S.r.l.

Via Gandhi, 50, 41122 Modena (MO)
Italy
Telephone +39 059 251009
Fax +39 059 251165
info@belloi.it

Hall map

GIFA 2019 hall map (Hall 16): stand E12

Fairground map

GIFA 2019 fairground map: Hall 16

Our range of products

Product categories

  • 05  Moulding and core making
  • 05.01  Moulding machines and plants for bentonite-bonded sands
  • 05.01.01  Moulding machines

Our products

Product category: Moulding machines

BRAP6 MULTIPISTONS MOULDING MACHINE

The moulding machine BRAP6 Multipistons is aimed at the production of green sand moulds by means of a high pressure moulding and multi-pistons with differentiated pressures.

The operating principle of moulding machines BELLOI & ROMAGNOLI:

1- The precompaction

2- Moulding with multipistons with differentiated pressures

3- Double squeeze : Double effect (squeeze from top and bottom adjustable )


1- The precompaction of the sand is extremely useful for uniforming the layer of sand near the pattern. The easiest and cheapest method of compacting sand is to make it fall, exploiting the force of gravity and turning potential energy into kinetic energy. As this phenomenon is regulated by the following laws:

Potential energy = mass x gravity x pouring height

Kinetic energy = ½ mass V2

(Impact force) Force x Time = Mass x Speed

it is obvious that the higher the pouring height, the higher the impact force and, consequently, the compaction effect of the sand on the pattern.


In order to obtain the above-mentioned effect, moulding machines of Belloi & Romagnoli are equipped with the pre-loading hopper at about 2-meter height from the pattern.

2- Moulding with pistons with differentiated pressures

The operation of the multi-piston head Belloi & Romagnoli has been designed and developed in order to obtain moulds with a constant hardness on all horizontal and vertical surfaces, also nearest to the flask edge.
To achieve this result, pistons are driven by two differentiated hydraulic circuits: one for inner pistons and one for outer pistons. By setting two proportional valves, it is possible to differentiate pressures in both circuits.

When the squeeze cylinder brings the sand in contact with pistons, sand compaction on the pattern takes place as if the sand between every single piston and the pattern itself were divided into several zones, in a number equal to the number of pistons. Each one of these columns compresses according to depth, sand compactability and pressure exerted by every single piston.
When the compaction of the sand reaches a value greater than the pressure of the piston, the piston begins to withdraw. The different behaviour of the sand near the walls of the flask is adjusted by differentiating the pressure values of inner pistons compared with outer pistons, giving higher specific pressures to outer pistons. (The surface of outer pistons is different from the surface of inner piston, in order to obtain higher specific pressures.)
Once all pistons have been activated and have reached their final position according to the pattern profile, their position is kept and the squeeze cylinder continues its stroke to obtain the maximum uniformity as to hardness of the mould.

The last moulding phase is obviously adjustable and allows to obtain the desired hardness.


3- Double squeeze : double effect (squeeze from top and bottom adjustable )

Double effect phase is a squeeze from top and bottom adjustable phase that ,thanks to the simultaneous or single ( adjustable and programmable from PLC and function of the PID/algorythm) relative movement of the squeeze cylinder and of the multipistons head, permit to optimize the moulding.


Cycle of operation
The cycle of operation of the machine is the sequence of operations automatically carried out by the moulding machine for the production of a mould and is as follows:
The beginning of the cycle coincides with the introduction of the flask into the moulding machine. At the same time, the transfer device rotates and carries the pattern to moulding.
The pre-loading hopper is filled during the above-mentioned operations.
The squeeze cylinder begins its vertical stroke. With the squeeze plate it then engages the pattern bolster, the flask and the containment frame. The dampers of the pre-loading hopper open and the flask is filled. The multi-piston head is automatically positioned on the moulding axis and the real compaction phase begins.
At this point, with the flask filled with sand, the squeeze cylinder continues its stroke and compacts the sand on the pattern.
At the end of this operation, the squeeze cylinder comes down and the shakeout begins. The descent of the cylinder continues until the squeeze plate reaches its initial position. Then, a new moulding cycle starts.

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Product category: Moulding machines

AUTOMATIC MOULDING LINE

Belloi & Romagnoli designs and manufactures automatic molding systems for over 40 years, the experiences made and the dialogue with our customers lead us to a continuous development and improvement of the quality of machines and plants.

A consolidated relationship with trusted technical suppliers allows Belloi & Romagnoli to always have updated technologies available.

A team of first-rate technicians and designers completes and perfects the overall picture.
The plant we can supply today is the result of all this work that obviously continues, the technical solutions are innumerable and must always be thought of in every single reality.

Each plant is different from the other, there are always small or large peculiarities, always new needs to be met, we like to think of ourselves as a tailor who takes measurements and makes the suit "tailor-made".

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Product category: Moulding machines

COMPACT MOULDING MACHINE

The COMPACT Molding machine was designed for foundries that require high quality molds at low-medium production rates. This machine will provide better quality and faster production rates than the typical jolt squeeze molding machine. The machine uses high pressure and a hydraulic squeeze to make the mold. The molding media for this machine is green sand.

The molding machine can be configured with two different types of molding, depending on the type of jets to be produced:

• Squeeze plate

• Multipistons head

The squeeze plate configuration is suitable for simple and flat pattern, the Multipistons type moulding machine with differential circuit for internal and external pistons provides a uniform mold hardness for all of the surfaces and also around the edges of the flask and it’s suggested for more complicated castings.

The operational settings for Hydraulic Squeeze are adjustable through the operator interface. The cope and drag molding operations can have different molding parameters. This machine can be used with your existing patterns. There are no problems with using wooden, urethane, aluminium etc. types of patterns.
The noise level emitted from this machine is less than 80 dB(A). This is a very quiet machine and will provide a notable reduction in the noise levels in the foundry relative to a typical jolt squeeze molding.

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About us

Company details

Belloi e Romagnoli S.r.l. was established in Modena in 1950.According to the foundation members, the main goal of the company is to become established on the foundry market with its own machinery. The first simple machines were pouring ladles, immediately followed by the first rotating mullers for the preparation of green sand.

During the 70’s and the 80’s a plain change in foundry took place both in Italy and abroad. Modern foundry requested advanced technology.

Thanks to its pressing requests, Belloi & Romagnoli made further progresses. During those years there was the production of P series intensive mullers, which meant a great increase in productivity, and of BRAP series hydraulic moulding machines, which already allowed a notable automation and reliability in moulding.

The new H Series hydraulic mixer units, unique throughout the world, the “MULTIPRESS” multi-piston squeeze head moulding machines, the TDR series cooling drums for sand and casting and last but not least the GSC automatic systems for sand control are today the best that technology can offer.

Belloi & Romagnoli, today, is a company with high professionalism, able to design and build quality machines, plants and equipment; where quality for us means “the Italian know-how", result of the work of generations of technicians, handed down and improved over time.

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