US2663230A - Apparatus for automatic withdrawing of pulp articles from molds - Google Patents

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Dec. 22, 1953 J. WAGNER 2,663,230 APPARATUS FOR AUTOMATIC WITHDRAWING ,OF PULP ARTICLES FROM MOLDS Filed Nov. 17, 1943 Dec. 22, 1953 v J. WAGNER 2,663,230

APPARATUS FOR AUTOMATIC WITHDRAWING QF PULP ARTICLES FROM MOLDS 2 Sheets-Sheet 2 Filed Nov. 17, 1948 a) M g Patented Dec. 22, 1953 APPARATUS FOR AUTOMATIC WITHDRAW- IN G OF PULP ARTICLES FROM MOLDS Jean Wagner, Paris, France Application November 17, 1948, Serial No. 60,426

Claims priority, application France November 20, 1947 2 Claims.

The pieces or rough shapes obtained from pulp sucked up on to a mould then dried by suction present problems of withdrawal from moulds that are difiicult to solve on account of their weakness owing to their moist condition.

A standard solution of this problem consists in using a counter-mould that is held over the dried roughshape by setting up a slight pressure in the mould or a lowering of pressure at the end of the counter-mould so that the rough shape mentioned works loose from the mould without getting out of shape and remains in the counter-mould; it is then comparatively easy to withdraw it from the counter-mould in order to send it to the drying appliances.

But the handlings involved in this Way of application of the counter-mould, drawing of the rough shape out of the counter-mould and sending to the drying, equipment, have various disadvantages, more particularly their high net cost and the serious dangers of change of shape that result in a high percentage of rejects.

The object of my invention is an appliance for automatic withdrawal from the mould, leading thepieces or rough shapes without any handling from the mould on which they are shaped up to an arrangement that guides them to the drying equipment.

It is characterised by the combination of the following component parts:

1. A watertight box carrying a counter-mould, this box being furnished with slides or similar guiding means.

2. Two arrangements of guides or slippers for these slides of which one is coaxial with the 'mould in the position that it assumes at the time of withdrawal from the mould and of which the other is vertical. These two arrangements converge at one of their ends on a turning plate furnished also with guides and able to take the box carrying the counter-mould coming from the first arrangement of slippers and to apply it to the second.

3. Means of drawing the box along the slippers, more particularly forks for drawing the box each connected to a chain actuated by a reciprocating motion parallel to one of the slippers, each fork being arranged so as to take a spindle fastened on the box and to draw it in the required direction.

4. The counter-mould, preferably, will be furnished with means of suction and, if necessary, of blowing respectively for the unsticking of the rough shapes and their lodgment on the travelling band.

The travelling band or similar contrivance, intended to take away the rough shapes to the drying equipment, will be located below the vertical guide.

The device works in the following manner:

The box drawn by one of the forks along the first guides then caps the mould and the rough shape that it carries; by blowingthrough the mould or by suction through the counter-mould, the rough shape is loosened. Then both are again drawn up to the turning plate where the spindle of the form engages in the teeth of the second fork. The turning plate pivots and puts the slides opposite the second guides so that the box is located in a vertical position and headed downwards; it will prove of advantage, there-' fore, to provide a suction device so as to prevent the rough shapes from falling off at the wrong time. The second fork then draws the box up to the lower point of the second guides and the rough shapes are lodged on the travelling band that leads them to the drying equipment (should it so happen'through stoppage of. the suction effected through the counter-mould, and if neces- F sary through a slight increase of pressure through the actual counter-mould).

With the rough shape lodged on the band, the second fork brings the empty box up to the turning plate where it is picked up again by the first fork, submitted to the first guides and goes back to the mould for withdrawing another rough shape.

Several counter-moulds may be combined in the same box and located in the same arrangement of guides while the moulding appliances are themselves located in a corresponding way below the tank containing the pulp.

The appliance may be designed either with male moulds and female counter-moulds "and boxes, or a reverse arrangement may be adopted.

The times of stoppage of the various component parts of this arrangement: box, mould and removal device, will be employed to advantage for accompanying operations before drying such as stamping, afiixing of color markings, opening of ports in the rough shapes, mechanical compression, etc.

The synchronizing of the various operations will be obtained in any suitable way.

The controls for the lowering of pressure (suctions) and for raising of pressure will be obtained either through a central system that may control likewise the movements of the various component parts of the appliance, or through these movements themselves.

For the clearer comprehension of my invention, an example showing the carrying out of it;

is illustrated in the accompanying drawings, in which:

Fig. 1 illustrates in a diagrammatic way an elevational View of the appliance.

Fig. 2 is a diagrammatic plan view.

In these two figures the same component parts carry the same reference numbers.

The moulding appliance is madeup of the wheel with four arms I located above the tank 2; each arm being furnished with a perforatel type of mould, A, B, C or D, this wheel being provided in a standard manner with means no t shown) for suction or for an increase of pressure in the moulds. This wheel is moved by a paw sm ratchet device that causes it to advance by a quarter of a turn in an equal length of time The operations take place in the following order:.., 1

Mould A", suctidnofthepuip against the mould.

Mould B or C, drying by suc'tionir M Mould D, withdra'" al from the mould by stoppage f the suctionand, in case of need, slight inc of pressurefor the loosening of the ijou'gh shape 3. The direction of rotation is shown y. the arrow 4., l

withdrawin $63 115 made up: of the box s e't on the "ndle' fithat carries the slides I; of the arrangements iof sl ppers 8 and S! and of the turning platens ,(ccnstitiited by two wheels l0 furnished with suppers; l l) of two drawing forks a 'dj ,[3, the first I2 actuated by a reciprocating motion, (shown by the arrows 7 L4) parallel to are. Slippers a, me second, ,l3 ac'tuated by a reciprocating motion, (shown, time arrows parallel to slippers 9. rheseror swm be set, for instance, on endless chainas'uch as HS and Hand going round return-pulleys such as l8, i9, an w, H M a The bojx will be furnished; preferably with a cour tij-rnould 24 aridwith a device, not shown, enabling a slight lowering f press re, or a slight' raising of pressure to be applied on the surface of the rough shape.

Th appl ance. Works, pth f l ow n wa he b'ox drawn by thefork IZJ inoYe'dIbythe chain [6 caps the mould Dand therough shape 3,. There is then astoppage of the suctionjinh d i the moiildli, next a slight, excess of pressure in this mould or a slight suction in the counter-mould (or both) sqas toloosen the: en

s ape from; .them, iild and n: it to the I bottom di ine counter-mould without giving rise to any anee nl' s a e; l .7 H

The fork l2 move d in the opposite di ir f by the chain l6 draws theboxfi and the counterm'ould up to the turning plate [0 through the aeeaaeo 4 gliding of the slides 1 in the guides or slippers 8, then H. The spindle 6 of the box is then located between the teeth of the fork l3, in which the turning plate causes it to pivot clockwise until it is brought to a vertical positiop and the slides 71 are brought in theextensiorr of the slippers a. The fork l3 being mounted on the chain H the movement given the latter lowers the movable box as far as the lower point of the li pe s W ere the d p of t u h shap takes, place, for instance, by a slight raising of pressure in the box 5.

The rough shapes are thus deposited at 22,

, on the conyeyor to the drying equipment that said guide, a rotatable plate between the saidtwo ingan axisthereon, a, countliemold n said is :2'

will be formed, for instance by a travelling Meanwhile, the box goes back to take up its position in front of the moulding appliance and the cycle starts all over again. It must be understood clearly that the m etho d andconditions of carrying outjthe appliance as illustrated in the drawing could not in any way. impose any re striction on the scope of my invention.

What I claim is: k A

1. Apparatus for re oving crude molded areaucts formed on a mold by filtering pulp through the mold, comprising a; mold carrier adapted for presenting molds successively, a movable box a first horizontal fixed rectilinear guide' on, side of the movable box in which the corresp ingen'd of the movable box slides; a se'con v, tical fixed guide of the same form as the fl st guides having a rectilinear groove of a, shape corresponding to that of the saidguides'; pwq entraining members positioned on both sweep: said guides and each comprisinga fork for co'v-' ering theaxis of the movable box.

2. Apparatus as claimed in cla m1 and includ ing endless chains,' ,forks on said endless chain's; said forks being engageable with the axis of said movable box, said endless chains constituting means for moving said box.

JEAN WAGNER;

References Cited in the me of this'patnt V v UNITED STATES PATENT I,

Number Name Date. 1,158,634 Chaplin Nov; 2; 1915 1,158,635 Chaplin Nov. .2, 1915 1,845,831 Chaplin Feb. 15, 1932 1,937,464 Norstrand Nov. 28, 19.33 1,970,608 Landon Aug; 21, 19,134 2,234,979 Randall et a1. Mar. 18', 1 941 2,307,022 Chaplin Jan, 1 .923.. 2,494,743 Chaplin Jan. 17, 1950

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