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Патент USA US3082830

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March 26, 1963
D. F. EDNELL
3,082,820
MACHINES FOR MOULDING OF PULP, ESPECIALLY OF FIBER PULP
Filed Dec. 9, 1960
DAN/EL Flu-‘0km EDA/ELL
ATTORNEY
‘ United States Patent 0 ” ice
31,082,820
Patented Mar. 26, 1963
1
2
3,082,820
The drawing diagrammatically illustrates an embodi
ment of the invention, where
FIG. 1 very simpli?ed shows a section through the
most important parts of a machine of the type in ques
MACHINES FOR MOULDING 0F PULP,
ESPECIALLY 0F FIBER PULP
Daniel Fredrik Ednell, Ed, Sweden
Filed Dec. 9, 1960, Ser. No. ‘74,845
Claims priority, application Norway Jan. 5, 1960
1 Claim. (Cl. 162—404)
Articles formed from pulp, especially from ?ber pulp,
?ber suspensions and the like, have today extensive use
tion, the parts being in position for the ?lling-in of ?ber
pulp;
FIG. 2 shows the same parts and details as in FIG. =1,
but the outer and inner mould members are in position
for compression of the pulp ?lled into the shaping space
in ‘the form of egg-cartons, flowerpots adapted to be im 10 of FIG. 1, and
FIG. 3 shows the same parts as the previous ?gures but
mersed in the soil together with a herb, and in the form
in the positions of the parts after a ready formed article
of other articles which, however, are rather loose and
has been expelled from the outer mould member.
have only little resistance to mechanical stresses. The
.In the embodiment shown on the drawing the device
object of the invention, therefore, is to provide such an ar
rangement in the machine producing such articles, that the 15 comprises an outer mould member 1 and an inner mould
member 2, of which at least the inner mould member is
articles, if desired, may be prepared as hard articles, that
perforated or in any other manner so constructed that
is articles substantially more compressed than previously
liquid may penetrate therethrough, e.g. consists of a wire
manufactured articles. The possibility of such a manu
gauze or the like. The inner mould member 2 may be
facture is especially important for refractory articles pre
moved towards and away from the outer mould member
pared from a ?ber pulp containing asbestos, and as an
1, e.g. by means of a hydraulic drive 3 comprising a piston
example of such an article may be mentioned small fun
rod 4. A guide 5 maintains the inner mould member
nels to be inserted into the ?lling-in opening of sand
2 in correct position, and the inner mould member 2 may
moulds, adapted to prevent e.g. that molten iron distorts
be provided with piston rings tightening against the
the area around the ?lling in opening when the casting op
eration takes place.
25 guide 5, so that a chamber is formed into which ?ber
In the previously known machines the amount of ?ber
pulp necessary for the formation of the article was drawn
pulp is introduced through the opening 7 by means of a
supply tube 8, which may become pinched when the inner
onto a perforated or grid-like outer or inner mould mem
mould member is advanced towards the outer mould
ber, and in many cases the article so obtained will be
ready for use without further forming or treatment but
if necessary a further treatment of the article may consist
member, to the position shown on FIG. 2, by means of
the driving means 3. in order that the desired amount of
pulp shall be enclosed within the chamber 6 without the
therein that the article is further compressed between the
possibility of escaping when the compacting takes place,
the inner mould member 2, according to the invention, is
provided with a nose 9 which preferably is cylindrical and
not be enclosed within a closed space and the compacting 35 provided with a conical tip 19. The cylindrical portion
of the nose ?ts exactly the ?lling-in opening 7 and thus,
to which the article is subjected will thus be limited.
during the ?rst part of the movement of the inner mould
In the case of articles manufactured from refractory
member 2 closes the opening 7 so that ?ber pulp cannot
masses the compression necessary for expulsion of the
escape from the space 6; accordingly the correct amount
liquid will be considerably higher than in the case of cellu
lose pulp, and the compacting of the pulp must take place 40 of ?ber pulp is in every instance compressed to form arti—
two mould members in order to remove still more mois
ture; but by such compression the formed ?ber pulp will
in a closed space so that no parts of the pulp can leak
cles having uniform properties.
if desired it is possible to insert into the opening 7 an
out, and in the present invention the so-called inner
axially displaceable lining or ring 11 having an internal
mould member of a machine having two relatively mov
diameter corresponding to the external diameter of the
able mould members is provided with a nose which ex
tends at the front end of the mould member and is adapted 45 nose 9.
When the compacting of the pulp has taken place, as
to cooperate with the ?lling-in opening of the correspond
indicated on FIG. 2, where for instance Water flows out
ing outer mould member, so that said opening is closed
at once when the inner mould member is started to move.
The invention thus relates to an improvement in a ma
chine for moulding or forming of pulp, especially of ?ber
pulp, comprising a compression arrangement consisting of
an outer and an inner mould member, which are movable
through a conduit 12, the article 13 now formed, e.g. a
funnel for the purpose above mentioned, should be re
moved, and the outer mould member 1 is raised at the
same time as the inner mould member 2 is lowered to the
initial position. A support 14 is then introduced below
the outer mould member 1 and is automatically or manu
relative to each other, so that pulp enclosed between said
ally so displaced that the ring or lining 11 ejects the pro
mould members may become compacted and freed from 55 duced article 13. The articles made ready are trans
moisture, and the invention is substantially characterized
ferred for eventual further treatment, eg polishing if
thereby that the inner mould member is provided with a
such treatment is considered to be necessary.
nose adapted to cooperate with the ?lling-in opening of
The embodiment shown only serves to illustrate the in
the outer mould member, so that the nose will close the
vention and does not limit the same, since also other em
opening during the ?rst part of the movement of the 60 bodiments than that shown are conceivable; e.g. the outer
inner mould member.
In a preferred embodiment of the invention the same
is characterized thereby that the nose comprises a cylin
drical main member and a conical pointed end, which to
gether form an extension of the inner mould member, and 65
mould member 1 may very well be perforated so that
liquid may penertate also here, but such one and also
other embodiments fall within the scope of the invention
if between the inner and the outer mould member there
is provided a shaping space which is closed by an exten
sion of the inner mould member as soon as the inner
according to still another feature the ?lling-in opening
mould member has started to move.
may be provided with an axially displaceable lining or
I claim:
ring, the dimensions of which ?t the nose of the inner
mould member, and which upon axial displacement there—
The improvement in a machine for moulding articles
of may eject the article after the latter has become suit~ 70 out of pulp by the movement of inner and outer members
ably compressed.
toward each other with pulp to be compacted therebe
3,082,820
3
a
tween which comprises, an inner mould member, an outer
said ring, said movable mounting of said ring in said
opening in said outer mould member for providing for
axial movement thereof for ejecting the article produced,
mould member, said mould members being provided With
mated mould surfaces, means for moving said members
toward each other, guide means for guiding said members
in their movement toward each other, said outer mould
member being formed with a ?lling opening at one end
thereof, a displaceable ring movably mounted and seated
Within said opening and lining the same, a reduced nose
having an initial portion cylindrical in cross section car
ried by said inner mould member in advance of the 10
on completion of the same.
References Cited in the ?le of this patent
UNITED STATES PATENTS
Re. 9,593
Stevens et a1. ________ __ Mar. 1, 1881
nose being formed to seat Within and close the opening
827,815
1,146,812
1,667,079
Ormiston _____________ __ Aug. 7, 1906
Noble ______________ __ July 20, ‘1915
Pietrusiak ____________ __ Apr. 24, 1928
through said ring ‘and a conical entrant tip formed at the
free end of said cylindrical portion to guide said nose into
1,873,585
2,326,758
Harvey ____________ __ Aug. 23, 1932
Chaplin et a1 _________ __ Aug. 17, 1943
mould surface thereof, said cylindrical portion of said
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