Note: Descriptions are shown in the official language in which they were submitted.
42~6
The present invention relates to a method for gluing of chips,
fibers and the like including ligno-cellulose-containing particles, which are
released free-falling in a vertical shaft or duct and during -the downward
movement therein being subjected at least partially to rotational forces, being
glued and thereafter being delivered from the shaft, duct or chute; the present
invention also relates to an apparatus for carrying out the foregoing method
with an at least substantially vertical shaft or chute having a circular shaped
cross section, an upper chip inlet and a chip outlet located therebelow, means
for supplying or feeding glue and including rotating tools which influence the
movement of the chips.
BACKGROUND O~ THE INVENTION
.
With a known method of this type disclosed by German
Offenlegungsschrift 16 53 26~ for gluing and impregna1:ing of wood chips and
the like, the chips by way of conveyor belts come ~ree-falling into a conical
funnel which opens into a mixing container that is larger in diameter than
that of the funnel. The chips fall into the mixing container without mechanical
engagement with rotating parts until reaching a mixing tool located at the
container bottom; the mixing tool is provided for exarnple in the shape of a
centrifugal di.sc or plate and the chips along this path pass through a down-
wardly directed spray cone generated in the middle of the container. The cen-
trifugal disc or plate, supported by particularly embodied blades, scoops and
the like move the chip flow which has fallen through the glue-spray-cone along
the walls of the cylinder in a flow upwardly again circulating around the
middle downward flo~ of the chi.ps, whereby chips not yet coated or covered
with glue prior to entry thereof into an upwardly located tangential discharge
or outlet can come again with the central incident or oncoming chip cone or
funnel downwardly in the region of the central downwardly directed glue-spray-
-- 1 --
~s~
cone.
Disadvantageous with this known approach is that the vertical mixing
container must have such a large diameter that the glued chips passing :Erom
the bottom of the mixing container helically or spirally to the upper outlet
do not influence the chip funnel dropping downwardly within this external -flow.
~urthermore~ there exists the disadvantage that the chips are destroyed during
reversal thereof by 180, particularly upon impinging against the fast rotating
centrifugal plate or disc and the conveying tools thereof. With the known
machine accordingly chip destruction arises as such destruction had to be
encountered and accepted with the known and previously horizontally located
fast rotating gluing machines with which the chip material must be reversed
or diverted from the vertical into a horizonta:L direction by entry, :Feeding or
drawing- taking-in blades. The mixing tools, particularly the diverting or
reversing blades located iJI the diverting or reversing location of the chip
flow heat up relatively strongly as a consequence of the friction and braking
of the chips encountered therewith. The consequence is a rapid wear of these
diverting or reversing tools as well as a rapid wearing-off of the drum in the
region of the diverting or reversing zone.
The main disadvantage lies in the chip destruction itself aside from
the wear which is not inconsiderable or unimportant. The chip destruction
has as a consequence a reduction of the transverse and bending strength (ultimate
tensile strength or tenacity~ :Eor the finished chip panel or plate as well as a
considerably greater glue consulllption, since the glue consumption is greater
to an extent commensurate with the smaller tlle glue particles are respectively
therewith.
An object o:E the present invention accordingly is to create a gluing
method or gluing machi.ne with wh.ich the incoming chips without positive reversal
-- 2 --
~ ~ ~4 ~'~
or diverting thereof out of the incoming direction are subjected to an optimum
gluing and glue distribution in a direction vertical or opposite thereto wi~hout
shock, impact or surge stress, and with a minimum heating by friction. A gluing
machine suitable for carrying out this method is to assure a high chip capacity
or through-passage with smallest possible chip destruction during an economical
gluing with nominal space requiremellt.
SUMMARY OF THE INVENTION
According to one aspect of the present inven~ion there is pro-
vided a gluing machine for application of glue on chips, fibers and similar
ligno-cellulose-containing particles which are discharged falling free into an
at least substantially vertical chute having a circular shaped cross section,
as well as having an upper chip inlet and a chip outlet located therebelow and
also including means for supply of glue and having rotating tools influencing
the movement of the chips, comprising a drum-shaped chute means, a shaft
rotating at relatively high speed passing through said chu-te means, tool means
on said shaft for forming a chip ring in the region of the incoming chips, and
brake tools also arranged on said shaft for stopping the downward free-
falling movement of the chips, the chip inlet providing a directional component
parallel to the rotational axis of the shaft and the chip outlet being arranged
at a lower end of the chute means, and conveying tool members being provided
having paddle-shaped working surfaces tapered radially outwardly -thereof.
Other aspects of the invention are set out in the claims.
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In the accompanying drawings:
Figure 1 is an axial section through a gluing machine illustrated
schema-tically;
Figure 2 shows the same axial section through the drum-shaped
chute of the gluing machine without centrifuging-tool shaft with tools and
drive;
Figure 3 shows an axial section of a further embodiment
corresponding to the illustration of Figure 2;
~, ,.
31. ;~, ~; L3L ;~6
Figure 4 shows a further axial section through the chute of the
machine with a tool sha:Et juurnalled on one side with drive from above;
Figllre 5 shows a partial section through the lower segment of the
drum-shaped chute with an advantageous arrangement of a centrifuging disc or
plate;
Figure 6 shows differing sample elnbodiments for supply or feeding
of glue;
Figure 7 shows a schematic radial section with a schemati.c illus-
tration of the arrangement of glue tubes and nozzles;
~O Figure 7a silows a radial section corresponding to that o F'igure 7;
Figure 8 shows an axial partial section through the dr~m~-shaped
chute and tool shaft with inner gluing device or apparatus;
Figure 9 shows a further possible embodiment of the centri.fuging
disc or plate upon the tool shaft effecting the glue distribution;
Figure 10 is a view of a chip-ring forming tool;
Figure 10a is a section taken along line Xa-Xa in Figure 10;
Figure ll is a view upon a brake tool;
~igure lla is a section taken along line ~Ia-XIa of Figure ll;
Figure 12 is a view upon a conveying tool; and
Figure 12a is a section ~aken along line XIIa-XIIa of Figure 12.
DETAILED DESCRIPTION
Re:Eerring now to the drawings in detail, the inventive gluing
machine provides a drum-sha-ped chute l with circular-shaped cross scction which
has a double mantle la with cooling water flowing therethrough. The chute is
preEerably arranged exactly perpendicular or vertical and has an upper chip
inlet 2 as well as a lower chip outlet 3. A tool shaft 5 with a rotational
axis 5' rotated by drive means 7 in a direction of arrow 28 is located centrally
-- 5 --
~5~24~
in the chute 1. The drive means 7 comprises a motor 34 with a drive or
transmission means, including for example a ~-belt drive. The shaft 5 is
journalled below externally of the machine in a thrust bearing 6 and is journal-
led above in a bearing 6'. Chip-ring-forming tools 9 as illustrated for ex-
ample more closely in Figures 10, lOa are located in the upper region of the
shaft below the inlet 2. These tools 9 rotate wlth the shaft 5 with very
high speed and bring about that the freely incoming or dropping chip material
is collected into a chip ring as entering in the direction of the arrow A from
the inlet 2 into the cylindrical chute without any reversal or diverting; the
chip ring forms in the ring-forming zone 15 under the influence of the high
rotational speed of the shaft including the tools 9. ~s a consequence of the
high centrifugal forces, the mass of the chips accumulates or deposits on the
inner wall of the chute and moves downwardly in a spiral or helical manner.
Under these circumstances, the chip flow moving downwardly along the walls comes
into a region of glue or adhesive add-ition 13 which in the sample embodiment
comprises three axially extending outer or external gluing pipes or tubes 13'
arranged adjacent to each other. The external gluing tubes 13' are arranged
closely adjacent to the ring-forming tool means 9 so that these pass directly
therebetween. Liquid glue or another fluid necessary for the gluing or
application of glue discharges from the openings of the glue tubes 13' project-
ing equally or at different distances into the free cylinder chamber discharg-
ing directly into the chip mass and being received thereby and distributed.
Since the chips are glued in a chip ring glicling along -the wall, the glue dis-
tributed from these tubes 13' at the d-ischarge is distributed intensively and
uniEormly upon the chips as a consequence oE the inti~late or homogeneously mixed
whirling through and mixing through thereof which means by way of the chip-to-
chip friction or rubbing.
6 T
Tools lQ located below the horn-like embodiment of tools 9 also
serve for this intensive thorough mixing and uniform distribution of the glue
inside the chip ring. These tools 10 are equipped in such a manner that they
exert a stopping or braking effect upon the chip mass slipping downwardly in
the form of a more or less compact chip ring so that a dwell of the chip mass is
effected sufficient for the glue distribution in the ring-forming zone 15 and
the adjoining stabilizing- or braking-zone 16. ~or this purpose, the tools 10
stopping the chips or braking the chip mass are provided offset or displaced as
to each other along an axial distance which is approximately as large as the
ring-forming zone 15.
With an advantageous embodiment, these tools 10 have a shape as
illustrated in Figures 11, lla. Moreover, the braking tools 10 are located
behind the glue addition or adding means 13 in arrow direction of the chips
as represented by a reference A without by way of this preferred arrangement
there being precluded any such arrangement with which braking tools 10 suit-
ably in combination with chip-ring-forming tools 9 can be arranged in the
ring-forming zone or gluing zone 15.
A discharge or ejection zone 17 provided with ejection tools 11
adjoins the braking zone 16. The ejection tools li advantageously have a
paddle-shaped form as shown for example in ~igures 12, 12a.
The flow of glued chips or chips having glue applied thereto
moving essentially in vertical direction downwardly discharges by way of the
outlet 3 which is elnbodied as a penetration or opening in the double mantle
la in Figure 1 and which is provided with a discharge door or flap 4.
This discharge door is journalled or suspended swinging or
pendulating at 4'; the discharge door suitably can ~e provided with a counter-
weight. The discharge door also can be embodied as an elastic closure, for
_ 7 _
~lS4l~
example as a multiply slotted rubber flap embod~ed in a simple or straight
forward manner. The flap, however, can also be loaded or biased by a con-
ventional spring tension.
The tool shaft as ~ell as all tools 9, 10, 11 arranged thereon are
made hollow and are cooled by a cooling water flow passed or guided there-
through. The drum-shaped chute 1 is divided in axial direction with the sample
embodiment according to F;gure 1 and is made capable of being opened on hinges
or folded out for the purpose of easily assembling for cleaning and repair
purposes. The vertical arrangement saves need for providing a special counter-
weight.
The chips to be glued or have glue applied thereto or other ligno-
cellulose-containing particles accordingly come free-falling in the direction
of arrow A into the chute by way of an inlet 2 located above the chute 1. The
chips or particles are collected into a chip ring directly after entry into
the chute without any reversal or diverting by way of protectively operating
horn tools and the chips or particles are wetted with a fluid or liquid glue
whereby the chips or particles are stopped or braked in the downward movement
thereof, particularly by ~orce components directed upwardly in the chute
effective below the chip-ring-forming zone. The chips or particles can be
moved upwardly again counter to the downward direction during every passage
of the so-called brake tools 10. The upwardly directed components of movement
effected upon the chip mass are applied to the chips in spaced intervals during
every rotation f the tools 10 where~y a delay enhancing the chip formation
and a dwell of the C]lip flow su~ficient for the glue distribution are attained.
The intensive mixing of the chips necessary for optimum glue distribution can
be adjusted or set at an optimum by a corresponding determination or propor-
tioning of the s-ize of magnitude of the movement and force components effective
-- 8 --
~ ~ 54 ~
upwardly upon the chips in SUC}I a manner that for e~cLmple in the ~egion of the
zones 15 and 16 the downward movement of the chip ring is overlapped in an
upward movement of the chip flow. As a consequence of the formation or develop-
ment of an opposite movement for the chip flow and by way o:E-the special forma-
tion or development of the bra~e tools 10 created for this purpose, there is
attained an intensive mi~ing of the chips simultaneously aside from the
necessary stabili~ation and the necessary dwell time such that the chip material
additionally cleans the inner walls of the chute and especially during over-
lapping of the downward movements and upward movements the chips are turned
and intensively glued therewith on all sides.
The paddle tools 11 located below the tools :L0 ~brake tools) stopping
the chip ring feed the glued chip matcrial toward the outlet 3.
With the embodiment of Flgure 1, the inlet 2 ls arranged above the
upper face side 18 of the chute 1 and the opening passes throu~h the face side
18. As shown by the sample embodiment of Figure 2, the inlet chute 2b also
can be arranged laterally in the upper segment of the chute 1, whereby the
opening 2c thereof passes laterally through the double mantle la o:E the chute
1. Figure 2 illustrates a further possibility with which the outlet 3a is
provided with the opening 3c thereof within the lower face side 19 of the chute
1.
~ ith the embodiment of Figure 1, the inlet 2 is located in the one
half of the chute 1 while the outlet 3 can be provided in the other half capable
of be-.i.ng moved away from tlle :Eir5t half.
With the embodiment of Figure 3~ which shows the chute 1 without tool
shaft and tools, the inlet 2Q and the lower outlet 21 are advantageously
installed rigidly or $ixed in location and releaseably connected with the chute
1, preferably by way of a quick releaseable connection in such a manner that
~ 1 54 ~ ~
the chute as an entirety~even iE itself made in two parts can be quickly removed
as a unit and for instance when the drum-type chute 1 is dirty or contaminated,
quickly being capable of being exchanged for another chute. The scre~
connection or a releasable ~uick coupling provided therewith is schematically
illustrated in Figure 3 and i5 designated with a reference 20a.
In place of a journalling of the centrifuging tool shaft 5 as shown
in Figure 1 by way of an upper bearing 6' and a lower thrust bearing 6~ there
can also inventively be provided a floating or single-sided journalling of
the shaft 5 in that the shat 5a as illustrated in ~igure 4 is journalled only
by means of a double-sided or bilateral, upper bearing 6a~ 7b~ The drive can
occur by way of a V-belt drive 7' or by way of a drive motor 7a which is
arranged above the chute 1. With the drive motor 7a there is eliminated -the
bilateral upper journalling.
For the purpose of attaining a steady~ smooth~ shockless or jolt-
free delivery of the glued chips protected as far as possible, according to a
further feature of the invention a discharge device in the form of at least
one rotating centrifuging disc or plate 12 is provided above the lower face side
19 of the chute 1. This rotating centrifuge disc or plate 12 can be driven
separately; the centrifuge disc or plate 12 however also can be rigidly connect-
ed with the shaft 5 ~see ~igure 5).
The centrifuging disc or plate with the embodiment of Figure 1 is
located directly above the lower surace 19, according directly above the bottom
of the chute 1, and having spacing relative thereto whereby air inlet o-peningrs
are provided in the bottom 19 in such a manner that the centrifuging disc or
plate 12 serves for formation of an air flow or air cushion shutting or divert-
ing away chips. For the purpo$e o~ increasing the air conveying effect of
the rotating centrifuging disc 12, this disc 12 preferably along the underside
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~ ~ S~ ~6
thereof or along the edge thereof can be provided with ribs or similar air-
conveying means 12c. The air is suctioned through the suction-air-inlet open-
ings 22 preferably slot-shaped as provided below the centrifuging disc 12
coaxially relative to the shaft 5, and conveyed between the underside of the
centrifuging disc 12 and thc lower surface 19 of the chute 1 in a direction to-
ward the outlet and consequently aiding in discharge protecti.ng the chip flow
without having the glued chips stri.ke or engage upon the centrifuging disc 12,
and consequently being subjected to a danger of chip destruction. The air-
conveying and guidance of the centrifuging disc can be so developed that the
conveyed air rises in the lower part of the cilute by a predetermined extent or
measure upwardly along the inner wall of the chute and accordingly permitting
an air cushion to arise Nhich nnakes possible a protective chip movement.
~ith the embodiment of the centrifuging disc 12' according to Figure
5, the disc is located securely or rigidly upon the shaft 5 above a suction
opening 22' in the :lower surface 19 of the chute 1. Air feeding or conveying
ribs 12'c as Nell as at least one centrifuging disc 1.2i reaching nea-rly to
the wall of the chute 1 effect a suctioning of air in the direction of the
arrows L whereby advantageously above the first disc 12'a there is arranged
a second disc 12'b Nhich likewise is provided Nith air-conveying ribs 12'c and
the like. Also here the suctioned and upwardly conveyed air is to support the
chip cushion and preclude that the dropping chips come into engagement with the
centrifuging disc. For improvement of the air guidance, it is noted that the
discs 12a and/or 12b can be provided with air openings 6~, ribs and the like.
~ith the embodiment oE Figure 1, a glue addition or supply means 13
is provided from the outside with which the glue addition tubes or pipes 13'
arranged individually axially with spacing from each other pass through the
double mantle la and terminate inside the mantle. The glue supply or additive
- 11 -
~ ~ 5 ~ 2~
means 14 is provided as an alternate glue additive or supply means in the region
of the upper face side 18. Also several supply or additive pipes or tubes 14'
can be provided whereby the tube 14' passes through the face side 18 and opens
approximately in the region of the uppermost chip-forming tool 9' in such a
manner that the discharge opening preferably is directed against the wall of the
drum or chute 1.
~ igure 6 schematically illustrates different possibilities of glue
fceding or supply from the outside. The glue supply pipes basically can be
arranged distributed along the circu~ference or periphery of the chute 1 in an
axial and/or radial plane but also in a helical or spiral shape.
~ith axial arrangement as shown in ~igure 1, it is purposeful if
the chip-forming tools ~ each pass directly between two adjoining glue supply
tubes or pipes 13' and flowing along the same in such a manner that the inwardly
projecting segments of the tubes or pipes 13' are engaged by the chip flow taken
along or following therewith so that approximately glue adhering to the glue
pipes or tubes is wiped away continuously.
In Figure 4, there i5 shown a glue container 24 connected by way of
conduits 24a with the glue supply pipes or tubes 13 corresponding to the axial
arrangement of Figure l; this glue container 24 is embodied pressureless and is
effective as a glue distributor and is supplied by a glue feed or supply conduit
24'.
Also conceivable i5 an embodiment with which a glue distributor 25
(see Figure 6) lies below the gl~e supply pipe or tube 13' and is colmected
with feed lines or conduits 25a to the glue pipes or tubelets 13'. The liquid
glue is supplied to the distributor 25 through the collecting conduit 25'.
Tlle pipes or tubes 13~ also can be arranged distributed over the
periphery or circumference of the chute 1 in a radial plane and can serve also
- 12 -
~ ~ 5~
for supplying or admixing of additional components such as emulsions, water,
insecticides and the like, irrespective of w~ether an axial or radial arrange-
ment is used. With the arrangement of a glue container below the feed or supply
pipe 13', the glue supply or addition occurs by means of nominal overpressure.
Figure 6 illustrates yet another embodlment with which the distributor
is a hose conduit 2~ which lies in the height or level of the glue supply pipe
13' and leading from the conduits 26a to the individual pipes 13' whereby
between conduit 26 and supply lines 26a there is connected a distribu-tor piece.
This embodiment is especially suitable when the glue is added under pressure.
~s shDwn further by Figure 6, the conduits of these individual
arrangement possibilities lead to the pipes or tubes 13' which also with this
embodiment project over the wall of the chute 1 into the free cylinder space of
chamber. The glue supply tubes can with an especially advantageous embodiment
be provided with high pressure nozzles prefera~ly wide-stream nozzles and also
being provided with a high pressure pump with which preferably a pressure of
20 to 40 bar is generated and being connected therewith. The glue is distribut-
ed into a wide spray or stream by such nozzles whereby an especially intensive
and good glue comminution and glue distribution is attainable.
~igure 7 shows that such nozz]es can be arranged lying in a single
radial plane whereby advantageously three nozzles are distributed uniformly
over the periphery or circumference. The nozzles also can be located adjacent
to each other in axial direction so that also the tools 9 can graze therealong
and therebetwecn.
The glue supply nozzles 27 are shown in ~igure 7; these glue supply
nozzles 27 are preferably arranged tangentially in such a manner that the
nozzles 27 open into the chute 1 in the rotational direction 2S of the chip ring.
The nozzles 27 can further be pivotally journalled in such a manner that the
- 13 _
spray stream is pivotable toward all sides within the pivot region of 10 to
~0, preferably 15. Upon adiustment or setting of the nozzles up to 90 there
is possible a glue addition or supplying counter to the rotational direction
of the chip material ring whereby an improved whirling of the chip veil or mist
is brought about. By way of the -tangentially directed discharge o~ the spray
stream existing under high pressure, there can he enhanced the ring Formation
of the chip flow in the region of the ring formation zone 15. Furthermore,
there ls to be attained by way of the adjustment of the nozzles 27 in all
directions and on all sides that the spray cones of different sizes are gener-
ated whereby the deposit ~ormation of acc~ulation of glue on the inner wall
of the drum chute, on the tools and on the shaft is precluded. Finally, by way
of the upward or downward inclination of the spray nozzles 27 as schematlcally
illustrated in Pigure 7a, there also can be influenced the formation and sha-pe
of the chip ring or the downward- and/or upward-movement thereof, and according-
ly there can be influenced the duration of dwell time therewith.
~ccordingly, by way~of the lateral or height pivot capability of
the nozzles, particularly the nozzle stream, there can be influenced the speed
of the downward move~ent of the chip flow, partlcularly to such an extent that
with a spray directlon CQUnter to the arrow directlon A the desired intensive
glue distribution is increased and by way of the side adjustment and/or dif-
ferent sizes of spray cones, the glue deposit or accumulation on the drum wall
and shaft 5 is precluded.
Figures 8 and 9 show an embodiment with which the glue is supplied
from the inside. Within the hollow shaft 5 (Figure 8) there is located a glue
supply pipe or tube 61 from which the glue by way oE several openings 29
pro~ided ln the shaft 5 comes upon a glue dlstributor -plate or dlsc 31 which is
provided with a preferably slanted outwardly inclined cover 32. l'his cover 32
-~ 14 -
forms a slot-shaped discharge opening 33a with the edge 33 of the plate or disc
31, and the glue is centrifuged out~ardly in the direction of the wall of the
container 1 by way of the discharge opening 33a where the chip flow is located
along the wall. ~elow the discharge opening of the glue supply pipe or tube
28 there is located a part 30 covering the hollow chamber of the shaft 5, for
example a disc, which is provided closely below the discharge opening 30. The
actual discharge opening 33a is located approximately in a spacing of 20 mm to
100 mm from the inner ~all; the glue passes through the discharge opening 33a
distributed finely outwardly directly into the chip ring located therewith.
The embodiment according to ~igure 9 differs from the embodiment of
Figure 8 only thereby that at the radially outer end of the slanted or inclined
cover 32 in the region of the edge 32' of this cover there is provided a draft
or outline edge 32'~ formed thereto which limits the slot-shaped discharge
opening 33a.
F~gure ~ shows an embodiment for the chip-ring-forming tools provided
in the ring-forming zone lS ~see ~:igllre 1). These ring-forming tools are
arranged on the shaft 5 offset or displaced relative to each other in peripheral
direction~ and bent away forwardly in such a manner in rotational direction 28
that the tools form an acute angle ~ with the radial fastening plane thereof.
The tools proyide a continuously decreasing cross section outwardly as far as
to the tip ~Q thereof extending accordingly substantially pointedly in the
manner of a horn whereby the tool back 36 is rounded off. Under these circum-
stances, the face 37 of the chip-forming tool 9 directed -forwardly in rotational
direction 28 provides two stra~ght surfaces 38, 39 lying substantially V-shaped
relative to each other. The embocliment of a tool effects a soft, chip-protecting
engagement first in the tip ~0 of the tool into the chip flow or into the chip
ring and a displacement of the chips along the straight surfaces 38, 39 whereby
- 15 ~
these chips are intensively thoroughly mixed, with each other.
The brake tools 10 illustrated in Figures 11, lla provide a scoop
or blade-like extension 41 extending in rotational direction 28 of the shaft
5 of which the surface ~2 directed upwardly is embodied sligh-tly concave in
curvature and the lower surface 43 thereof extends outwardly bulged or curvedin
arcuate shape in a direction onto the shaft 44 of the tool 10. A leading edge
45 of the brake tool 10 e~tends in-to a tip ~G in such a manner that this front
tip ~6 of the foremost point of the tool is in the rotating direction and the
Eront edge ~5 o the tip 46 extends back toward the extension or comlection in
the shaft. The rear edge 48 of the narrow surface of the blade or scoop is
made in an arcuate shape and has a transition ~ith a larger arcuate radius into
the lower edge leading to the shat in rotational direction and parallel to
the outer edge 49.
Advantageously, the brake tool 10 is so installed slanted or inclined
forwardly that the tip thereof is deeper than the rear blade surface, so that
the chip mater~al received ~r taken up receives a movement component directed
upwardly in rotational direction. The slanted or inclined position can be
adjusted respectively and correspondingly according to the quantity conveyed
or passing therethrough and according to the chip characteristic.
The discharge tools 11 illustrated schematically in Figures 12, 12a
are made having a paddle shape and taper outwardly. The shaft 50 which is pro-
vided with the screw-in thread provides a circular cross section with the other
tools and has a transition Erom this circular shape in-to a substantially rec-
tangular or square cross section which ls increasingly smalle~ toward the outside
in such a manner that the chip material conveying face surface 51 is slightly
concave while the rear surface 52 is substantially a straight or linear surface
embodied therewith.
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~ ~ ~4 ~
Aside :Erom the previousl~ indicated advantages, there is particularly
advantageous with the apparatus according to the present invention ~ha-t the
drive capacity is up to o~er 5~ smaller than with devices or apparatus accord-
ing to the state of the art. Consequently! the present inventive apparatus
proYides a saving in energy.
In summary, the present invention provides a method for gluing or
application o glue relative to chips or particles containing chips, Eibers, and
similar ligno-cellular material which are discharged :Ealling freely into a
vertical chute, and being subjected at least partially -to rotational forces dur-
ing a downward movement thereof, being glued and thereafter being discharged
from the chute characterized there~ that the chips during the free-Eall thereof
are collected into a rotating chip material ring and are glued after at least
substantial formation of the chip material ring are subjected to uwpardly
di.rected components of movement in such a manner that the chip material ring
is stopped in the downward movement thereof. The upwardly directed components
of movement are so large that the downwardly moving chip particles of the ormed
or forming chip material ring are reversed iJI the direction of movement thereof
and are again moved upwardly. The upwardly directed components of movement
are generated continuously~ for example by at least one flowing medium such as
a spray stream and/or discontinuously or example by rotating tools.
The gluing machine for carrying out the foregoing method includes at
least a substantially vertical chute having a circular-shaped cross section,
also including an upper chip inlet and a chip outlet located therebelow, means
Eor su~pplying glue ~nd also including rotating tools influencing -the movement
o:E the chips, characterized thereby that the drum-shaped chute 1 ha.s a sha:Et 5
passing therethrough rotatable at high speecl upon which above in -the region
of the incoming chips there are arranged chip-ring-forming tools 9 and there-
~ ~ 5~ 2 ~
below there are arranged ~raking -tools 10 stopping the downward movement of
the chips, and that the chip inlet 2 provides a directional component 2', 2"
parallel to the rotational axis 5' of the shaEt 5 and the chip discharge or
outlet 3 is arranged at the lo~er end of the chute 1. The brake tools 10 are
arranged offset or displaced relative to each in axial and in rotational
direction behind or after the chip-ring-forming tools 9 in the arrow direction
A of the chips. At least one brake tool 10 is arranged before the longitudinal
middle of the chute 1 in ~he arrow direction A. The brake tools 10 are located
behind or after the gluing tools 13 in the arrow direction A of the chips. The
inlet 2 is arranged above the upper face or side 18 of the chute 1 and the
opening 2a thereof penetrates or passes through the face side 18 of the chute
1 (Figure 11. The opening 3c of the chip discharge 3a (Figure 2) lies within
the lower chute face side 19. A rotating centrifugal disc 12 is arranged in the
region of the discharge 3 in Figure 1. The centrifugal disc 12 is embodied
for formation of air guidance diverting or shunting the chips away. Pipes or
tubes 13' are provided for the glue supply means 13 which are arranged in an
axial and/or radial plane or helical or spiral shape distributed along the peri-
phery or circumference of the chute 1.
A hose conduit 26 is provided as a distributor in the height or level
of the glue supply tube 13' from which conduits 26a lead to the pipes or tubes
13' CFigure 6). The glue supply tube 13t is provided ~ith high pressure nozzles,
preferably wide-spray or stream nozzles and are connected with a high pressure
pump. The glue supply nozzles 27 are pivotally ~ournalled in such a manner that
the spray stream is pivotable ~;thin a pivot range of 10 to 90 towarcl all
sides, preferably upwardly and downwardly. A glue supply tube 61 is p-rovided
in the hollow shaft 5 ot Figure ~ and severaL discharge openings 29 are provided
in the shaft 5 arranged or associated as to the opening of this glue supply
- 18 -
~ 46
tube 61. The ring-forming toals 9 offset or displaced as to each other in
axial or peripheral direction are bent forwardly in rotational d;rection 28 in
such a manner tha-t the tools 9 form an acute angle with the radial as well as
having a continuously decreasing cross section outwardly as far as to the tip
and furthermore that the tool back portion is rounded off according to the
Figllres 10, lOa.
The brake tool lQ has a scoop or blade-type extension extending in
the rotational direction 28 of the shaft 50 wich the upwardly directed surface
42 of the extension being curved slightly concave ancl the lower surface 43 there-
of extending in an arcuate shape in the direction toward the tool shaft 44
according to Figures 11, lla.
The brake tool lO is slanted or inclined rearwardly as arranged
relative to a radial plane extending -through the tool shaft and furthermore
the inclined position of the brake tool 10 is adjustable.
The feeding or advancing tools 11 are provided with radially out-
wardly tapered paddle-shaped ~orking surfaces according to Figures 12, 12a.
The tool shaft 5 and the tools 9, 10, 11 arranged thereon are provid-
ed with cooling passages for con~ey~ing cooling water therethrougll.
The present in~ention is, of courseJ in no way restricted to the
specific disclosure of the specification and drawings, but also encompasses any
modifications within the $cope of the appended claims.
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