JPS591158B2 - mobile lamination press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endless tread type moving lamination press particularly useful for laminating stacked boards in the production of longitudinally curved laminated beams.

The main object of the present invention is to provide a mobile device for curing adhesive by dielectric heating using an endless tread belt configured to firmly grip a stack of boards to be laminated in a longitudinally curved shape. We provide laminated presses.

Another object is to provide a mechanism for synchronously adjusting the press support mechanism so that laminated beams of different curvatures can be manufactured.

The mobile press, which is shown in its entirety in Figures 1 and 2 of the accompanying drawings, has an infeed section 1, a preload section 2, a main press section 3 and a delivery section 4 in this order.

A stack P of boards to be stacked is supplied to a table 5 of a feeding section in a stacked state with an adhesive sandwiched between the boards.

Preferably, the adhesive is a thermosetting resin that can be cured by dielectric heating (through an insulator by means of a high frequency electromagnetic field) or by chemical action.

The table 5 may accommodate several sets of stacks P in side-by-side relationship, each of which can be moved laterally at right angles to its length and brought into alignment with the rest of the press.

From the infeed section 1, the stack P is fed longitudinally through a tunnel 6 into the preload section 2.

Each such force is fed between at least two pairs of side leveling upright rollers 7 and 8, mutually oriented in the longitudinal direction of the path of movement of the stack of boards through the press.

Six pairs of leveling rollers are pressed toward each other to move each group of boards laterally relative to each other and into precise alignment before the adhesive between adjacent boards hardens.

In the preload section 2, the board overlap is supported by a plurality of live rollers (power driven rollers) 9 and the hold-down is tightened by a mechanism 10.

With the stacked boards 75 aligned and thus pretightened, the stack of boards is sent by the preload section to the main press section 3 between the lower endless tread belt 11 and the upper endless tread belt 12. entered.

These belts pass the overlap to the main press section where the adhesive is cured and after curing the double endless tread belts deliver the overlap to the delivery section 4.

As shown in FIG. 3, each infeed-side leveling roller 7 is mounted eccentrically on the rotating shaft 13, and each delivery-side leveling roller 8 is mounted eccentrically on the rotating shaft 14. There is.

Both sprockets on both axes 13 and 14 on the same side of the board overlap are connected by a chain 15 so as to synchronize the rotation of rollers 7 and 8.

Therefore, as the stack of boards enters between the infeed-side leveling rollers 7 and these rollers are spread out to receive the same, the out-feed leveling rollers 8 are correspondingly spread out by the chain 15. This causes the shaft 14 to be rotated to the same extent as the shaft 130 is rotated by the rotation of the roller 7.

As a result, both rollers 8 are expanded to the same extent as both rollers 7.

The side edge leveling rollers 7 and 8 may be idle rollers or live rollers.

In the preload section, roller 9 supports the overlapping boards.
is a live roller, preferably driven by a hydraulic motor 16 coupled to the live roller 9 by a chain sprocket transmission 17.

Similarly, a hydraulic motor 18 drives a live roller 19, which is located in the hold-down mechanism 10 and is supported on the top surface of the stack of boards in the preload section.

In order to achieve the most effective driving action of the lower rollers 9 and upper rollers 19, it is preferred that each upper roller 19 be positioned substantially directly above the lower roller 9 as shown in FIG. Is Rukoto.

In moving the stack P of boards through the preload section 2, it is important that the same traction force be applied to the top and bottom of the stack, so as to avoid any tendency for the stacked boards to slide longitudinally relative to each other. is added.

Therefore, the lower living roller 9 and the upper living roller 19 are
By precisely rotating the hydraulic motors 16 and 18 that drive both in exactly the same manner, they are driven at exactly the same speed.

Synchronization of both motors is achieved by supplying liquid under pressure to both motors by means of a flow distributor 20 which equalizes the amount of drive liquid flowing to both motors.

As the board stack P is fed into the main press section 3 by the preload section 2, it is fed by the cooperation of both the lower and upper endless tread belts 11 and 12.

The lower belt 11 is moved by a chain 21 driven by a hydraulic motor 22.

The upper endless tread belt 12 is moved by a chain 23 driven by a hydraulic motor 24.

What is important in this case as well is that the lower endless tread belt and the upper endless tread belt are driven accurately in synchronization.

Liquid is thus supplied to both lower motors 22 and upper motor 24 by means of a flow distributor 25 which precisely equalizes the proportion of liquid flowing to these motors.

The structures of the lower endless tread belt 11 and the upper endless tread belt 12 are substantially the same as shown in FIG.

The tread plate 26 of the lower belt 11 is made of a very hard insulating material, such as polyurethane, having a durometer (hardness gauge measured by the depth of a needle penetrating a test specimen under constant pressure) value of 90.

Such plastic tread components are attached by bolts to plate elements 11 which are attached to an endless chain 28 driven by a drive chain 21.
7.

The endless chain 28 does not carry all the heat of the weight of the tread plates 26, 27 or of the stack P of boards supported by the red plates.

Instead, the edges of the plate 110 attached to the chain 28 are made of a hard, low-loss, non-polar, low-friction insulating material, such as polyethylene plastic, bonded to the top seven flange of the support beam that makes up the press bed 30. It is supported directly on the backing strip 29 of.

The beam flanges and strips 29 supporting opposite sides of the plate 11 are mutually supported sufficiently to receive the chain 28 therebetween.

The upper endless tread belt 12 has a tread plate portion 31 made of a very hard insulating material, such as polyurethane, similar to the tread portion 26 of the lower endless tread belt.

Each of these tread plate portions is an endless chain; 33
The metal plate 32 is attached to the tread plate 12 attached to the tread plate 12 by bolts.

The chain is received in a slot between backing strips 34 joined to the lower flange of the beam 35.

Such backing strips, like strip 29, are made of a hard, low friction insulating material such as polyethylene plastic.

Chain 33 is driven by chain 23.

The entire upper endless tread belt mechanism is supported by a superstructure having parallel I-beams 35 carried by and projecting downwardly from a frame 36.

The frame 36 has a passage 3T therein, through which the upper return stroke portion of the endless tread belt 12 passes.

The frame is guided so as to be movable up and down by a straight inner rod 38 which is reciprocatable within a vertically adjustable support 39.

If said support is in any vertical adjustment position selected corresponding to the thickness of the board overlap P, downward pressure is applied to the upper endless tread for the purpose of tightening the boards of the overlap P while the adhesive is curing. It can be added to the lower stroke part of the belt.

The downward force is exerted by supplying gas or liquid under pressure to an inflatable chamber 40, such as a flattened elongated bladder.

The air bladder is thus interposed between the support 39 and the frame 36.

The force exerted by the expansion of this air bag is ■Beam 35
and is transmitted to the metal plate 32 and the tread plate 31 via the backing band plate 34.

While the boards of the stack P are held under pressure in this manner, the lower belt 11 and the upper belt 12 move in unison to move the stack P longitudinally, as shown most clearly in FIGS. 4 and 7. between the dielectric heating electrodes 41.

Such an electrode is mounted on a slider 43 that can reciprocate within a guide 44.
It is supported by a mounting stand 42 mounted on the.

These electrodes are elastically pressed by an inflatable bag 45 between a mounting base 42 and a support 46 carried by a slider 47 reciprocable in a guide 48 towards opposite sides of the overlap P. I don't mind.

The guide 48 is mounted stationary on a column 49 of the frame of the press.

An electrode support 46 is attached to such a column in the main press section 3 of the press.
A screw 50 that can be engaged with the Bonide stack P for the purpose of moving it closer to the Bonide stack P or away from the four stacks is also installed.

All screws 50 are interconnected by chains 51, 52 and 53 on one side of the endless tread belt.

Sprockets engaged by chains 52 and 53 on opposite sides of the press are mounted on a transverse shaft 54, with a crank 55 mounted at one end of the transverse shaft.

All screws 50 on each side of the press are chained 5L52.
and 53, and the chain 5
2 and 53 are interconnected by shafts 54 on opposite sides of the press, so that by manually rotating the crank 55, the screws 50 will all rotate at the same speed, causing the opposite sides of the press to rotate at the same speed. Electrode supports 46 on both sides
to the same extent toward the board overlap P or move it away from the quadruple overlap.

Therefore, by rotating the crank in this manner, the positions of the electrode mounting stands on opposite sides of the endless tread belt can be quickly and easily adjusted to approximately position the electrodes 41 in accordance with the width of a particular type of board. They can be easily adjusted to move toward or away from each other.

Once the position of the electrode pedestal has been thus established, the bladder 45 can be inflated to resiliently press the electrodes onto opposing sides of the overlap.

It is desirable to conduct radio frequencies (from audio to infrared frequencies) as far as possible from the electrode 41 past the electrically insulating edge of the tread plate 26 to the grounded conductive metal portion 11 of the tread plate or to the chain 28. ) to prevent energy leakage.

The insulating tread plates 26 are therefore such that the leakage paths from the electrodes 41 on opposing sides of the board stack P to the conductive portions of the endless tread belt are sufficiently small to prevent appreciable leakage of radio frequency energy from these electrodes. It must be wide and thick enough so that both sides are large.

Preferably, both electrodes 41 are operative, but it is also possible for one electrode to be operative and the other to be grounded, as in a single-sided device.

If it is desired to relieve the stack of boards P from the pressure exerted by the upper endless tread belt 12, the entire frame 36 and conveyor drive mechanism is shown in FIG. Bag 56 shown in
It can be raised against the support 39 by inflating it.

These bags are engaged between the upper transverse section of the frame 36 and the upper part of the support 39.

When these bladders are inflated, the guide rod 38 is raised to slightly raise the endless tread belt 12.

If it is desired to retract the upper endless tread belt a substantial distance upwardly, such retraction may be accomplished by retracting the lower end connected to the entire endless tread belt support 39 and carrying the same. This is achieved by rotating in unison the female threaded sleeve 57 which is engaged with the thread 58 that has it.

Preferably, at least four sets of internally threaded sleeves 57 and screws 58 carry the endless tread belt support 39.

Such sets of sleeves and screws are arranged in the rectangular relationship shown on the left in FIG.

In order to ensure that all screws 58 are raised in unison and equally, pairs of mutually threaded sleeves 57 are connected by a chain 59 in the lateral direction of the press.

Furthermore, two female threaded sleeves extending from each other in the longitudinal direction of the press are also connected by a chain 60.

Therefore, all the female threaded sleeves 57 are rotatably interconnected to uniformly raise and lower the upper endless tread belt.

The entire holding mechanism 10 can be raised and lowered by simultaneous rotation of the female threaded sleeve 61 which is threadedly engaged with the screw 62.

The screws, preferably four arranged in rectangular relationship, support the mechanism.

The six pairs of threaded screws arranged in the transverse direction of the press are connected by a transverse chain loop 63, and the two threaded sleeves 61 arranged in the longitudinal direction of the press are connected by a chain loop 64, so that all The threaded sleeves are adapted to be rotated at the same time.

If either the hold-down mechanism 10 or the upper endless tread belt 12 is to be raised or lowered, it is desirable for the other to be raised and lowered in unison and to the same degree.

Therefore, it is particularly desirable to synchronize the rotation of all threaded sleeves 57 and all threaded sleeves 610 by attaching one hold down threaded sleeve 610 to the upper endless tread by means of a chain loop 65 as shown in FIGS. It is to connect with one of the belt threaded sleeves 57.

This chain screw sleeve device can be driven manually or by an electric or hydraulic motor as desired.

In some cases, it may be desirable for laminated beams to be manufactured by the longitudinally bending press of the present invention.

To manufacture such a beam, the individual boards of the overlap P are individually bent longitudinally and the adhesive between such boards holds such boards in this bent state. It will harden while you are there.

Such bends will have very large radii, for example for the purpose of manufacturing laminated beams with cambers for arched roofs.

A press mechanism for manufacturing such a curved laminate board is shown in FIGS. 8-15.

In order to glue the boards of the stack P to each other so that the glued structure coming out of the press will be curved in the longitudinal direction, what is needed is an endless tread belt 11 on opposite sides of the stack of boards. and 12 are required to be correspondingly bent into complementary shapes.

Accordingly, one endless tread belt, shown as belt 11 in FIGS. 8 and 9, will be bent mid-low towards the overlap of the boards, and the other endless tread belt 12 will be bent towards the overlap of the boards. It will be curved into a complementary shape towards the overlap.

The endless tread belt can be constructed as desired by providing a support member 29' for the belt 11 and forming the various members of the press bed 30 so that the height thereof gradually increases from the left to the right, as shown in FIGS. 8 and 9. It may be curved in the longitudinal direction.

Correspondingly, the backing member 34' for the opposite endless tread belt 12 increases in height from left to right as seen in FIGS. 8 and 9.

This increase in the height of the support member 29' relative to the endless tread belt 11 and the backing member 34' relative to the endless tread belt 12 results in
This is accomplished by slightly deforming the frame of the press by placing shims 69 or other lifting devices of varying thickness under the supports 68.

Each shim or lifter farther from the delivery end of the press is thinner than the next shim or lifter closer to the delivery end of the press.

Because of this difference in the height of the backing members, the laminate P" coming out of the press will be curved upwards if the individual laminate pieces entering the press are in a horizontal plane; Also, if the individual laminate pieces entering the press are in a vertical plane, they will curve to one side.

The curvature of the endless tread belt area that engages opposing sides of the board stack is very gradual.

The difference in thickness of adjacent shims or lifting devices determines the degree of curvature of the opposing regions of the endless tread belt.

The preload section shown in FIGS. 8 and 9 of the press is identical to the preload section 2 shown in FIGS. 1 and 2.

The preloading rollers 9 and 19 as well as the delivery-side leveling roller 8 are therefore shown rather schematically.

The board stack P can be fed into the preload in the same manner as described for the presses of FIGS. 1, 2 and 3.

In such a case each board would lie in a horizontal plane.

Alternatively, the press structure can be repositioned so that each board of the stack is disposed in a vertical plane as it passes through both the preload and bond sections.

Figures 10 to 16 show a type of press structure that allows the press bed to be bent into various shapes in order to change the longitudinal curvature of the laminated beams that are constructed.

In general, the construction of the press shown in FIGS. 10-16 is similar to that described with respect to FIGS. 1-9.

The board stack P is moved longitudinally from left to right by upper and lower endless tread belts 12' and 11', as seen in FIG.

The lower belt 11' is carried by the bed 30 and is attached to a metal mounting plate 27' which is interconnected and moved by two endless chains 28' which extend transversely to each other at right angles to their respective lengths. Glued rigid polyurethane or other plastic material tread plate 26
have.

The upper endless tread belt 12' is made of hard polyurethane or other plastic bonded to a metal mounting plate 32' interconnected by two endless chains 33' running transversely to each other at right angles to their respective lengths. It has an upper tread plate 31 made of material.

Although the width of the boards in the overlap P'' is shown to be somewhat larger than the width of the tread plates 26 and 31, these tread plates apply pressure to the overlap of the boards to effect adhesion, as shown in FIG. It may be wider than the overlapping board depending on the additional requirements.

The spacing of the upper and lower endless tread belts 12' and 11' can be varied by raising and lowering the upper endless tread belt entirely to pass overlapping P'' of different thicknesses.

Such height adjustment of the upper endless tread belt 12' is effected by simultaneous rotation of the screws 58' carrying the frame supporting it.

Such screws are rotated in unison by a chain arrangement interconnecting sprockets mounted on the shafts of the screws as shown in FIGS. 10.11 and 12.

This adjustment mechanism is similar to the mechanism shown in FIGS. 1, 2 and 3 and previously described.

The central horizontal chain 59' has a sprocket 59 mounted on a shaft carrying a sprocket that engages with the chain.
“Driven by an adjustable chain that rotates.

One chain 59' rotates around the shaft of the screw 58', and the chain 60' also extends in the longitudinal direction of the press.
It carries a sprocket against.

The adjusting screw shaft driven by this chain is also the 11th
Drives a transverse chain 63' which drives a corresponding screw on the opposite side of the press as shown.

The other transverse chain 59' drives the shank of the screw 58' on the opposite side of the press, and this shank has a sprocket for driving another chain 65' extending in the longitudinal direction of the press. is mounted.

This chain drives the shaft of another screw 58', which carries a sprocket for driving a transverse chain 63''.

This transverse chain synchronously drives the shaft of another adjusting screw 58' on the opposite side of the press.

Thus, by the sprocket chain connection shown in FIGS. 10.11 and 12, the six screws 58', by rotating the sprocket 59'', are all in unison to raise and lower the entire upper tread belt 12. and can be driven synchronously.

At any position in which the height of the upper tread belt 12' is adjusted, the pressure exerted by the upper tread plate 31 on the board overlap P'' is carried by the lower travel portion of the endless tread belt 12'. can be varied and controlled by varying the fluid pressure within the bladder 40', which is interposed between the height-adjustable frame and the height-adjustable frame.

This structure is similar to that previously described for the hydraulic bladder 40 shown in FIG. The structure of is modified as shown in FIG.

The tread mounting plate 32' is supported directly on a backing strip 29' of hard polyurethane plastic or other low friction material which is mounted on the height adjustable frame.

Bed 30 supporting the lower endless tread belt 11'
Zero curvature can be easily varied so that the press will shape the board overlap P'' into a beam with the desired longitudinal curvature.

The adjustment mechanism for changing the curvature of the press bed 300 is shown in Figures 10.12 and 16.

The bed of the press is supported by a pair of jacks spaced apart along the length of the bed.

Such jacks may be of the threaded type and may be anti-friction threaded jacks if desired.

These jacks are all interconnected in such a way that - when one jack is adjusted, all the other jacks will be adjusted in unison and to the same extent.

In FIG. 10, jack pair 70a.

70b, 70c, 70d, 70e, and 70f are shown extending to progressively greater extents from left to right.

These jacks are all adjusted simultaneously and in the proper ratio by rotating the shaft 71.

When this shaft rotates, a shaft 72a connected to this shaft by a chain 73a also rotates.

As shaft 72a rotates, jack pair 70a will be adjusted, and such adjustment will be greater than the adjustment of any other pair of jacks.

The shaft 72b of the jack 70b will be rotated by the chain 73b.

This chain connects the sprocket 74a on the shaft 72a and the shaft 7
The sprocket 74b on the sprocket 2b is connected to the sprocket 74b.

The sprocket 74a is sprocketed to the extent necessary to rotate the shaft 72b at the proper ratio relative to the shaft 72a.
smaller than

Next, the shaft 72c of the jack 70c is rotated by a chain 73c connecting the sprocket) 74c on the shaft 72b and the sprocket) 74d on the shaft 72c.

The shaft 72d of the jack 70d is the sprocket on the shaft 72c)
It is rotated by a chain 73d connecting the sprocket 74e and the sprocket 74f on the shaft 72d.

The shaft 72e of the jack 70e is rotated by a chain 73e connecting a sprocket 74g on the shaft 72d and a sprocket 74h on the shaft 72e.

Finally, the shaft 72f of the jack 70f is rotated by a chain 73f connecting the sprocket 74i on the shaft 72e and the sprocket 74j on the shaft 72f.

Sprocket 74c is smaller than sprocket 74d, sprocket 74e is smaller than sprocket 74f, sprocket 74g is smaller than sprocket 74h, and sprocket 74i is smaller than sprocket 74j.

Therefore, not only will shaft 72b be rotated less than shaft 72a, but shaft 72c will be rotated less than shaft 72b, and shaft 72d will be rotated less than shaft 72c. Therefore, the shaft 72e will be rotated less than the shaft 72d, and the shaft 72f will be rotated less than the shaft 72e.

The effective length of jack 70b will be changed less than the effective length of jack 70a, the length of jack 70c will be changed less than the length of jack 70b, and the length of jack 70d will be changed less than the length of jack 70c. This means that the length of the jack 70e can be changed less than the length of the jack 70d.
Also, the length of the jack 70f can be changed less than the length of the jack 70e.

Since all pairs of jacks are positively interconnected by the chain and sprocket reduction mechanism described above, the ratio of the motion of each jack is related according to the reduction ratio between such jacks and the motion of all other jacks. It turns out.

Changes in the curvature of the press bed 300 will correspond to varying degrees of change in the effective length of the jack pairs.

The jacks can therefore be adjusted all at once and in the proper proportion simply by rotating the shaft 71.

Although the change in the curvature of the bed 300 of the press will be small enough that the endless tread belt 11' will not be changed appreciably, even if a suitable tensioning mechanism for such an endless tread belt is provided, if necessary. I do not care.

The jack pairs are transverse members 75a, 75b, 75c, 75d as shown in FIGS. 10.12 and 16.

75e and 75f, respectively, and these transverse members pass the return stroke portion of the endless tread belt between such a jack support member and the floor F, as shown in FIG. is sufficiently distanced upward from the Act.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a mobile lamination press according to the present invention, and FIG.
The figure is a side view of the press in Figure 1, Figure 3 is a side view of the press opposite to that shown in Figure 2, enlarged and partially cut away, and Figure 4 is a side view of the press shown in Figure 2. Press along line 4-4 in Figure 5.
FIG. 5 is a partial side view of the press showing a different part of the press mechanism from that shown in FIG. 3, and FIG. 7 is a detailed vertical section showing part of the press along line 7--7 of FIG. 6; FIG. 8 is a longitudinally curved view of a single stack of boards; FIG. 9 is a partial vertical cross-sectional view showing the press mechanisms arranged to be fastened together in the state shown in FIG.
The figure is a partial vertical sectional view showing the press mechanism in Figure 8 on a larger scale than in the same figure, and Figure 10 is adjustable to change the degree of curvature of the press for manufacturing a single layer of boards curved in the longitudinal direction. 11 is a plan view of the press of FIG. 10, and FIG. 12 is a line 121 of the press of FIG. 10.
2, Figure 13 is a center vertical cross-sectional view along line 1 of Figure 10.
3-13, FIG. 14 is a cross-sectional view taken along line 14 in FIG.
15 is a cross-sectional view along the line 15-14 in FIG.
15, and FIG. 16 is a longitudinal section taken along line 1 of FIG.
FIG. 6 is a vertical cross-sectional view taken along line 6-16. IL11'... "Lower endless tread belt",
12, 12'... "Upper endless tread belt",
30... "Support device", P, P"...
"Overlapping boards".

Claims (1)

Claims: 1. A mobile laminating press for laminating a stack of boards, said machine for moving a stack of substantially horizontal boards in a generally horizontal longitudinal direction from an infeed end to an outfeed end. - An upper endless tread belt and a lower endless tread belt each having an inlet end and an outlet end that can be engaged with the upper and lower surfaces of the stacked boards, respectively; a curved laminated structure formed in an arc shape with a predetermined radius; In order to manufacture the body, the lower endless tread belt is supported with its infeed end lower than its outlet end, and the belt is longitudinally curved in an upwardly mid-low direction between the infeed end and the outlet end. a lower belt support device configured to hold the stack of boards in a longitudinally similarly curved position while the belt is moving the stack of boards through the press; The upper belt elastically presses down the endless tread belt against the upper surface of the stacked boards to form the board into a longitudinally downwardly curved shape complementary to the upwardly curved shape of the lower endless tread belt. a backing device; the upper belt backing device is deformable such that the upper endless tread belt can automatically and dependently conform to the curved shape of the lower endless tread belt. 2. A mobile laminating press for laminating a stack of boards, each engaging the upper and lower surfaces of said stack of boards for moving said stack of substantially horizontal boards in a generally horizontal longitudinal direction; a pressure device having upper and lower endless tread belts capable of producing a curved laminated structure supporting said lower endless tread belt and formed in the shape of an arc having a predetermined radius;
a support device for maintaining the boards in a similar longitudinally curved state while moving the stacked boards through the press; and for changing the degree of curvature of a lower endless tread belt supported by the lower belt support device. said press having an adjustment device for adjusting said lower belt support device of said press.