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7/28/2019 Seiatsu Gb

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SeiatSu

air-Flow Squeeze

Moulding ProceSS


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SeiatSu... the process for producing consistently perfect moulds.

2

The SEIATSU air ow squeeze moulding process is a

method of compacting moulding sand. The required quantity

of sand is released when the louvre shutters of the sand do-

sing hopper are opened. The mould is formed by a pattern

plate mounted on a pattern bolster. A guiding frame on top

of the moulding box guides the sand into the box (g. 1).

The sand dosing hopper underneath the sand storage hop-

per then moves to the side and simultaneously the squeeze

head moves in position over the mould. The machine table

rises thus pressing the bottom bolster (including the moul-

ding box and lling frame) against the squeeze head, her-

metically sealing the system. The SEIATSU air ow valve is

then opened. The air is passed through the moulding sand

from the back of the mould and towards the pattern. Vents

provided on the pattern plate or on the pattern itself facilitate

the air ow simultaneously through all the components

(g 2).

The mould is then compacted by applying pressure in an

arrangement that may use a squeeze plate, an elastic

squeeze plate or a multi-ram press (g. 3). Whilst the com-

pacting process is proceeding the dosing hopper is relled.

To separate the mould and the pattern the machine table

is lowered and the sand dosing hopper and the squeezing

head are moved back to their datum position (g. 4).

th pss s.

The sand is lled into the mould box to cover the pattern The SEIATSU AIRFLOW Squeeze Moulding Process is applied

Mould example: Brake drum, approx.: 500 mm Mould example: Cylinder heads, asksize: 1550 x 1100 mm


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After-compacting by multi-ram press Separation of pattern and mould

Mould example: Bottom Flask for a ow clutch, rib width 2.5 mm, dia. approx. 400 mm Previously made using sand cores,now with green sand mold insert. After the nishing pressure is applied an even mold is formed.

When penetrating the moulding sand the air ow results in

a downward force on every grain of sand. Thus the air ow

forces the sand into every recess in the mould pattern. The

packing density increases in the direction of the ow, layer

by layer, in such a way that the sand is most tightly compac-

ted in the zones that are closest to the pattern.

To demonstrate this excellent compacting effect 35 mm high

layers of sand of different colours were built up around a

pattern. After the air ow was applied the thickness of the

layer at the bottom was reduced to 20 mm whilst that at the

top was 30 mm. With the subsequent pressing, a uniform

compaction of the entire mould is achieved.

The air-ow.

Moulding sand

coloured layer

pattern


4/104

The advantages of the SeiatSu process.

The moulds produced are uniformly hard resulting in the

production of dimensionally accurate castings. The moulds

produced by the SEIATSU air ow process are considerably

harder than those produced by jolt squeezing.

ufmy hh m hss.

In many cases cores can be eliminated when moulding

complicated pattern shapes and extreme cods with the

SEIATSU process

F s .

Draft can be reduced to 0.5 when using the SEIATSU

process, resulting in corresponding reductions in use of

material and in machining costs.

r p f.

The ability to reduce the distance between patterns from

each other and the side of the mould results in improved

utilisation of the available space and hence more castingsper mould.

impv s f h m sp.

0 10 20 30 40 50 60 70 80 90 1 00

Measuring points

Mould hardness (GF units)

Sandheight(inmm)

0

20

40

60

80

100

120

140

160

180

200

JoltingJolting + squeezingAirflowAirflow + squeezing = SEIATSU

Core Selfcore ingreen sand

285

Taper0,5

320

170

200

Jot Squeeze Mac inewith core

SEIATSUSqueeze Moulding Process

without core

100

80

60

40

20

0 10 20 30 40 50 60 70

mouldhardness

distance A in mm

jolt-squeezing

air flow-squeezing

Dis tance A 20

78

78

85

80

30

82

81

85

83

50

40

84

83

85

84

62

50

85

84

86

85

68

60

85

85

88

86

72

Mean value

Mean value

Measuringpoints

1

2

3

Jolt-squeezing

1

2

3

260

250

200

A

Air flow squeeze moulding

Jolt squeeze moulding

1,2

D1

Castingweight

Maximum variation range

D2

H1

H2

mmkg 0,8 0,4 0 0,4 0,8 1,2

D2

D1

H2

H1


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The SEIATSU process achieves consistently high general

and surface quality, and dimensional accuracy with almost

no burrs, so that fettling requirements and machining costs

are very considerably reduced.

r f ss.

15 20 25 30

Compression resistance N/cm3

50

60

70

80

90

100

GaspenetrationresistanceGd

with air current

without air current

1. Using pressure alone

porosity 29,2 %

2. Using air ow and pressure

porosity 32,9 %SEIATSU-PROCESS

Casting tolerances/GTB15, DIN 1685

3 2 1 0 1 2 3

L = 810 mm

B = 397 mm

H = 152 mm

Weight of casting162 kg

Where the jolt squeeze process is replaced by the air ow

system noise levels are brought down to 85 dB(A). This

brings a major improvement in the working conditions in a

evm vs.

foundry. The SEIATSU process does not produce shock

loads so that the foundation requirements are simplied,

the impact on the surroundings is reduced and there is less

need for maintenance.

Comparison of the noise emissionbetween jolting and SEIATSU

level time signal of ajolt moulding machine

(ram jolter)

l l ll l

l

110 dB(A)

100 dB(A)

90 dB(A)

85 dB(A)

80 dB(A)

j l i I

l l i i lj l l i i

j l

level time signal of aair flow squeeze moulding machine

(open valve)

Dynamic load in the surroundings of moulding machines

30

Distance of the machine in m

Vibrationspeedinmm/s

2 3 4 5 6 8 10 20 30 40

20

10

8

6

5

4

3

2

1

0,8

0,6

0,5

0,4

0,3

0,2

0,1

admissible range

SEIATSU moulding machine

jolt-squeeze moulding machine


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There is a SeiatSu moulding machine to suit everymoulding plant requirement

Pattern-draw moulding machine (pin- or roller

lifting) with pattern turntable for the production

of cope and drag moulds, equipped with at

squeeze plate or water cushion. Sand lling

by hopper discharge belt. Moulding box

handling manually on roller conveyors or

with lifting appliance. Turnkey machine with

integrated hydraulic system and electronic

control. Moulding box

Inside sizes mm

Output approx.

compl. m/h

500 x 400

1000 x 800

40

15

HSP

Lowering moulding machine with pattern

turntable for the production of cope and drag

moulds, equipped with at squeeze plate or

elastic squeeze plate. Sand lling by hopper

discharge belt or batch hopper. Moulding

box handling by hydraulic cylinders on roller

conveyors. Turnkey machine with integrated

hydraulic system and electronic control.

500 x 400

1250 x 1000

70

20

HSP-d


roller conveyor for the production of one

mould-half each, equipped with at squeeze

plate or multi-ram press. Sand lling by hop-

per discharge belt or batch hopper in front of

the machine with possibility of manual inter-

vention. Moulding box handling by means of

hydraulic cylinder on roller conveyors.

1000 x 800

2500 x 2000

50

10

daFM-Sd


turntable for the production of cope and

drag moulds, equipped with at squeeze

plate, elastic squeeze plate or multi-ram

press. Sand lling by hopper discharge belt

or batch hopper in front of the machine with

possibility of manual intervention. Moulding

box handling by means of hydraulic cylinderon roller conveyors.

500 x 400

1250 x 1000

100

50

daFM-Sd

Moulding box

Inside sizes mm

Output approx.

compl. m/h

Moulding box

Inside sizes mm

Output approx.

compl. m/h

Moulding box

Inside sizes mm

Output approx.

compl. m/h


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Fully automatic lowering moulding machine

with pattern roller conveyor and pattern

shuttle truck for the production of cope and

drag moulds, equipped with multi-ram press

as standard equipment. Sand lling by batch

hopper. Moulding box handling by means of

hydraulic cylinder on roller conveyors.

1000 x 800

2500 x 2000

60

20

eFa-S

Fully automatic lowering moulding machine

with pattern turntable for the production of

cope and drag moulds, equipped with multi-

ram press as standard equipment. Sand l-

ling by batch hopper. Moulding box handling

by means of hydraulic cylinder

on roller conveyors.

500 x 400

1600 x 1250

140

80

eFa-Sd

Fully automatic twin-type moulding machine

for simultaneous production of one cope and

one drag mould, with pattern roller convey-

or and pattern shuttle truck, equipped with

at squeeze plates, elastic squeeze plates

or multi-ram presses. Sand lling by batch

hoppers. Moulding box handling by means

of hydraulic cylinder on roller conveyors.

500 x 400

1250 x 1000

250

160

zFa-S

Fully automatic twin-type moulding machine

with pattern turntable for the production of

two cope or two drag moulds or one moul-

ding box pair, equipped with at squeeze

plates, elastic squeeze plates or multi-ram

presses. Sand lling by batch hoppers.

Moulding box handling by means of hydrau-

lic cylinder on roller conveyors.

500 x 400

1250 x 1000

250

160

zFa-Sd

Moulding box

Inside sizes mm

Output approx.

compl. m/h

Moulding box

Inside sizes mm

Output approx.

compl. m/h

Moulding box

Inside sizes mm

Output approx.

compl. m/h

Moulding box

Inside sizes mm

Output approx.

compl. m/h


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SeiatSu examples of grey iron casting

Electric motor housingsmaterial: EN-GJL, mass: 280 kg, 26 kg, 3,8 kg

Engine blockmaterial: EN-GJL, mass: 150 kg

Axlematerial: EN-GJL, mass: 680 kg

Oil coolermaterial: EN-GJL, mass: 28 kg

Engine blockmaterial: EN-GJL, mass: 300 kg


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Oilpanmaterial: EN-AC, mass: 33 kg

Oilpanmaterial: EN-AC,

mass: 31 kg

SeiatSu examples of aluminium casting

Gearboxmaterial: EN-AC, mass: 24 kg

Cagematerial: EN-AC, mass: 4 kg

Valve cagematerial: EN-AC, mass: 0,5 kg


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VO

10

0006/11

SeiatSu a perfect casting

Hitch cage

material: EN-AC, mass: 12 kg

Exhaust cagematerial: EN-AC, mass: 4 kg

din en iSo 9001:2000

Zertikat: 09 100 72018

HeinricH wagner Sinto

Maschinenfabrik GmbH SINTOKOGIO GROUP

Bahnhofstrae 101 57334 Bad Laasphe, Germany

Phone +49 (0) 2752 907-0 Fax +49 (0) 2752 907-280

.-s.

seiatsu gb

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