Патент USA US2409394код для вставки
(kt 15, 194-6- 1.. L. S>CHAFFER 2,409,393 ‘ FLUID PRESS. Filed July 29, 1943 2 Sheets-Sheet l lNVENTDF-i. 1. ES LIE LASZLU E31: HAP-FER. ATTDRN H‘ E. - Oct. 15, 1946. ‘ 1.. L. SCHAFFER " ' 2,409,393 FLUID muss Filed July 29, ‘1943 ' 2 Sheets-Sheét 2 ‘ . . Inventor: /. ESL/E LASZLO ‘SCHAFFER 16 21 x N 2,409,393 Patented Oct. 15, ‘1946 UNITED ‘STATES’ PATENT oFnca ‘FLUID rnnss’ I Leslie Laszlo‘Schaffer, Vancouver, British Columbia, Canada ‘ ‘ _Application July 29, 1943, Serial No. 496,635, 3 Claims. (Cl. 144-281) V 2 closed at their ends. A partition or base 13, also carried by the hinges I2, is located between the casings I0 and II. Suitable means may be pro vided for limiting the outward movement of the casings, such as, for example, brackets 5 having elongated slots 6 therein. Each bracket is piv-_ otally connected to the base l3 at l, ‘and. a threaded pin 8 extends outwardly from the ad '- Thisinvention relates to improvements in ?uid presses. ‘ ' ‘ j ' An ‘object of the present invention is the pro vision of a1 ?uid press for forming and shaping laminated articles. ‘ ' ' ' Another object is the provision of a ?uid press particularly for forming and gluing plywood ar ticles, such as clips; ‘angles; fasteners; cabinet, furniture and panel moldings, shaped parts; and the like. ‘ 1 jacent casing through the slot of the bracket 10 where it is held in place by a nut 9. If desired, ‘Another object is‘the provision of a press for producing these articles without internal stresses, bridging, misalinement, twisting or warping, or in other words, articles which will always retain their ‘proper shape. ‘ - ' the casing Ill may be mounted on brackets Ill which retain said casing at an angle to the’hori zontal. The casing ll may be closed over the casing 10 with the partition or base l3 therebe 15 tween and they may be ?rmly held together by - A further object islthe provision of a press for any suitable locking ‘mechanism, such as by. molding ‘thin laminations without splitting or wrinkling them during the operation. means of clamps I5 hingedly mounted on one casing and ?tting over blocks l6 carried by the other casing. As_ the apparatus between each 20 side of the partition or base [3 and the adjacent which does not requireskilled operators. casing is' the same, only one will be described in Another object is the provision of apparatus detail. for veneering preshaped parts or articles,‘ ‘ A mold ll of the shape of the ?nished article Yet another object is the provision of a press is mounted on the surface of the partition or of the nature described of, very'simple and in 25 base l3 facing the casing. This mold is of any expensive construction. 1‘ ' i > " practical shape, in this case it is V-shaped, and With these and other objects-in view, the pres it may project through and beyond one or both ent inventionv consists essentially of a ?uid press ends of the casing as shown in Figures 1 and 2. for»molding laminated ‘articles, comprising a’ The casing and partition form a support for a mold of the shape of the ?nished articles, means for resiliently retaining a plurality of superposed 30 layer‘ I'll of a suitable ?exible material, such as - A still further object is the provision of a press laminations of bendable material with glue there- ‘ canvas, yieldably mounted thereon. The layer between around the mold, and means for ?rmly pressing the. laminations against the surface lof the mold to impart the shape ofthe latter to the laminations‘as they are pressed together, as more 35 which is connected to one side of the mold or to‘ in 4the following speci?cation and the accom springs 20, anchored to the bottom of the casing the partition adjacent the latter stretches across to the opposite side of the casing and has slots [9 for clearing the blocks 16 and‘clamps I5. The fully described and illustrated by way of example ‘ ' layer extends to suitable yielding means, ‘such as panying‘drawings, in which ‘a or at any other suitable point. If desired, rollers 2| ‘may be provided at the outer side of the casing in order to prevent the layer from having to move around sharp corners. When the partition is in ‘ Figure 1 is a "front elevation of one form of ' press, ' l ‘ Figure 2 is a plan view thereof, ' > Figure‘B is ‘anenlarged cross section through‘ the vertical position shown in Figure 3, there is the press when open and ready for’ loading,‘ ‘ . Figure 4 is a similar view with‘ the press closed, a space between the mold and the layer. ' A ?ller 22 of wood or other suitable material Figure 5 diagrammaticallyillustrates a press 45 is located in the casing and a cavity‘ 23 of sub stantially the‘same shape as the mold I1 is cut for‘ applying one or more veneers‘ to a mold or ' core. .I , therein.‘ The cavity -_is,'however, larger than the . , ‘Figures 1 to 4 illustrate a double press, but it ‘mold so that when the latter is placed in‘the iscto be understood that this arrangement may former, there is a space therebetween for hold: 50 ing a bag 24 formed ‘of a suitable ?uid-impervious sistsof‘ two casings Ill and II connected together 7 ‘ ?exible material. The bag in this space will as also beused in ‘a. single press. The press con sume substantially the shape of the cavity and mold, and shoulders 25 on the ?ller extend over at. their‘adjacent edges by' V-hinge‘s l2.‘ These casings‘ are open‘ topped and for convenience, the upper edges of the bag. The space between may be‘formed from channel beams or half 'cylin-‘ dersof the desired-length and width“ whichare' 55 these shoulders?is equal approximately to the 3 2,409,293 width of the mold ll at the top thereof. Fluid under pressure is supplied to the bag through a pipe 26 which extends through the bottom of the casing. If desired, a protective layer 21 of can vas or the like may be placed over the top of the bag. It is obvious that, in place of the bag 24, a layer of ?uid-impervious material may be secured to the inner surfaces of the shoulders 25 forming a space above the surface of the cavity into which the ?uid may be directed. The molds in this press are designed to form relatively long plywood angles and so the molds are V-shaped in section and are fairly long. In operation, the press is opened up, as shown in Figure 3, that is, the casing II is moved about the hinges 12 away from the casing H] as far as the brackets 5 will permit. This causes the par tition l3 to assume a vertical position and the layers Hi to stretch out over the entrance to the cavity 23. A plurality'of laminations 30 of bend able material, ,say for example, wood, with glue therebetween, are placed on each layer IS. The laminations may or may not be encased in or 4 layer I 8, while pressing the laminations ?rmly at the bending line, permits relative movement of the laminations laterally away from the said line so that all the laminations are intimately 5 retained together. This method maintains the laminations in proper alinement and, consequent ly prevents the development of internal stresses which might later alter the shape of the ?nished article. It also prevents “bridging” which is the 10 result of glue failure along the bending line. The fact that the pressure is ?rst applied on the bending line and a ?rm contact is maintained thereon by layer 18 prevents the laminations from separating from each other at any point. The 15 movement of the wood away from' the bending line before the main pressure is applied elim inates any possibility of this movement being stopped by the pressure along the relatively large sides of the V. It will be noted that there is 20 very little strain on the bag at any point because it is supported on all sides by the ?ller 22, shoul ders 25, layer lBand the laminations on the mold. The bag is emptied before the press is opened covered by paper or other material. It is only necessary to move the laminations inwardly to 25 and it is preferable to have a valve in the ?uid supply line, which is closed (after the bag is de wards the mold as far as they will go. This auto ?ated so that the latter will not materially rise matically retains them in their proper positions. in the cavity when the molded article is removed. Then the casing II is closed over the casing it Cold-setting or hot-setting glue may be used.» with the partition therebetween and the unit In the latter case, the mold I1 is heated in any locked in this position by means of the clamps 30 suitable manner, such as by means of an electric l5. This loading is a very simple operation and heating element 3|. A thermometer and a ther may be done by anyone without any special mostat may be provided for indicating and regu training. ' lating the temperature of the mold. The bag is The action in each section of the press is the same. During the ?rst part of the movement, the 35 spaced from the heated mold, by the laminations side of the mold i1 bears against the laminations, and the mold presses the laminations into the to be ‘bent and the ?exible layer 18 and also the layer 21, if used. consequentlyythe bag is not liable to deterioration due to overheating because cavity 23. Actually, the pressure is ?rst applied it does not come into direct contact with the to the laminations by the outermost part of the heated mold. In the right section of the press mold, and this part presses them into the cavity. 40 the cavity 23 moves towards the mold [1, while In other words, the ?rst and greatest pressure in the left section thereof,v the latter moves is directed along the main bending line of the towards the former. laminations, resulting in intimate contact here While this press has beenshown with layers before the ?uid pressure is applied. All this time, I8, it may be used without them. In this case, the layer I8 ?rmly presses the laminations against the mold so that they cannot move out of place, 45 the laminations would have to be placed on the ?ller 22‘ over the cavity 23. In fact, they may be and yet the yieldable support of the layer per premolded into approximately their ?nal shape mits the laminations to move relative to each other and away from the bending line when they a before gluing. The mold I1 then presses said laminations into the cavity and they are‘ pressed are assuming their ?nal shape during this oper ation. The necessity for this relative movement 50 against the former by the pressure of the bag. This is not considered as satisfactory as the ?rst may be illustrated by bending a gro’upof pages described method, since there is more likelihood of a book. It will be noted that if the pages of the laminations becoming displaced during are kept against each other there is a relative movement therebetween resulting in a bevel being 55 this operation and since the relative movement of the laminations may not be su?icient to elim formed at each side edge of the pages. With this inate all the disadvantages of the systems where V-shaped mold, the layer holds the laminations in no such movement and no initial pressure on most ?rmly at the point where they bend around the bendingline is provided for. the bottom relatively sharp corner of the V. This - The layer I8 is an important element in this is very desirable and it results in the laminations being pressed from this bending line towards 60 press. The resistance it offers causes the pres sure ?rst to be, applied to the bending line as the their sides. The layer l8 supporting and guiding mold moves towards the cavity. In fact, once the the laminations continuously during the whole layer has wrapped the laminations about the loading and closing operation, prevents the dis mold; the ?nal pressure may ‘be applied to said placement, splitting, wrinkling and overlapping laminations in any suitable manner; although the of the laminations, which would happen if they ?uid pressure is preferred. were not so supported and guided continuouslyt Figure 5 shows the press adapted for veneering When the press is locked, the bag 24 (or the wood molding or veneering'cores. In this modi space beneath the layer covering the surface of the casings are indicated by the numeral the cavity) is ?lled with fluid under pressure. 70‘ ?cation 35 and are connected‘ together by a hinge 36 This exerts the same pressure over the entire which supports a partition or base 31. The base outer surface of the laminations bent around the is adapted to receive one or more strips 38 pre mold. As well known in hydraulics, the pressure viously referred to as cores, which are tov be cov is exerted at right angles to the ‘surface at_ all ered with a- veneer. These cores are adapted to points. Asthis pressure is‘ applied, the yielding 75 be secured to the base by any suitable means and 2,409,393 6 mounted between the casings, a mould of the shape of the ?nished article mounted on each side of the base, a cavity in each casing adapted to receive the mold on the base opposite its cas ing, a layer of ?exible material positioned on op posite sides of the base, each layer being con nected at one of its ends to the base of each mold and extending over the entrance to the cav bag M, as previously described. The springs 4i] ity, resilient means connected to the opposite end tension the layer 39 and as the casings are closed, of each layer to keep it taut, each of said layers the layer exerts the initial pressure upon the 10 being adapted to receive between itself and its veneer, forcing it into intimate contact with its adjacent mold a plurality of superposed lamina core 38, ready for the ?nal fluid pressure to be tions of bendable material with glue therebetween to be readily removable after the veneer is ap plied, a layer 39 of flexible material is fastened along one of its borders to‘ the base 37 and eX tends over the remote side edge of each casing, where it is held taut by springs as. The casings are provided with fillers 4| de?ning cavities 42 and each cavity is preferably ?tted with an air applied through the medium of the bag 44, in ?ated by steam, compressed air, or liquid. What I claim as my invention is: l. A fluid press for molding laminated articles, and yieldably to press and hold against disalign 15 ment said laminations around the molding sur faces of the molds as the latter are moved into comprising two casings hingedly connected at their adjacent upper corners, a base hingedly mounted between the casings, a mold of the shape of the ?nished article mounted on each side of the base, a cavity in each casing adapted to re ceive the mold on the base opposite its casing, a layer of flexible material positioned on oppo site sides of the base, each layer being connected at one of its ends to the base of each mold and extending over the entrance to the cavity, resil ient means connected to the opposite end of each layer to keep it taut, each of said layers being adapted to receive between itself and the adja cent mold a plurality of superposed laminations of bendable material with glue therebetween and yieldably to press and hold against disalignment said laminations around the molding surfaces of the cavities when the casings are brought to gether with the base therebetween, a ?uid-imper vious flexible bag lying on the surface of each cavity, means for ?rmly holding the casings to gether with the molds in the cavities, and means for supplying fluid under pressure to the bag to press the articles against the molds. 3; A ?uid press comprising a casing, a base hingedly mounted on the casing at one side there of, a mold mounted on the base, a cavity in the casing adapted to receive the mold, a layer of ?exible material secured at one of its ends to said base in close proximity to the mold and stretching across the cavity, resilient means an chored to a ?xed point and connected to the op posite side of the layer to keep it taut, said layer being adapted to receive and hold against dis alignment bendable material between itself and the molds as the molds are moved into the cav the mold and yieldably to press said material 35 ities when the casings are brought together with around the mold as the base is pivoted to move the base therebetween, means within each cavity the mold into the cavity, means within the cavity capable of moving outwardly therefrom, means capable of moving outwardly therefrom, means for ?rmly holding the casings together, and means for ?rmly holding the mold in position in the for moving the movable means of the cavities 40 cavity, and means for moving the movable means outwardly therefrom to press the articles against within the cavity outwardly to press the material the molds. against the mold. 2. A fluid press for molding laminated articles, comprising two casings hingedly connected at their adjacent upper corners, a base hingedly LESLIE LASZLO SCHAFFER.