JPH0631810A - Press - Google Patents

Abstract

PURPOSE:To obviate the need of the conventional adjustment of packing thickness in a press for welding a sheet of rubber, synthetic resin, or other materials along a long straight line of the length of several meters or more by enabling the uniform application of pressure and decreasing the weight of an upper and a lower frames. CONSTITUTION:In the application of pressure to a sheet sandwiched between a fixed plate 11 and a movable plate 35, elevating beams 21, 22 are installed above the movable plate 35. A number of weights 31 having the same form are suspended at equal intervals from the elevating beams 21, 22 so that the movable plate 35 is pressed by the weights 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for applying a uniform pressure along a long straight line exceeding a few meters in length when splicing films, sheets, ribbons, plates and the like made of rubber or synthetic resin. It relates to a pressure press.

[0002]

2. Description of the Related Art As a pressure press for stacking a wide rubber sheet having a width of several meters or more, a long beam-like fixing plate is fixed horizontally on a lower frame and equidistant from an upper fixing beam above it. By horizontally suspending a horizontally long I-beam through a large number of hydraulic cylinders lined up in parallel, and simultaneously operating the large number of hydraulic cylinders to lower the I-beam, the I-beam is preliminarily fixed to the lower surface of the I-beam. It is known that the hot platen beam is pressed onto the fixed plate.

[0003]

In the conventional apparatus, the upper fixed beam and the vertically movable I-beam are connected by a large number of hydraulic cylinders. Therefore, when the hydraulic cylinder is operated, the upper fixed beam above the hydraulic cylinder is fixed. Beam up, I down
The beam, the heating plate beam, and the beam-shaped fixing plate are curved downwardly to cause uneven pressure, and in order to prevent this, it is necessary to robustly manufacture the upper frame and the lower frame. Further, since the heating plate beam with a built-in heater is fixed to the lower surface of the I-beam that can be raised and lowered, when the heating plate beam expands due to temperature rise, the heating plate beam bends in a wavy shape,
Therefore, pressure unevenness occurs between the lower beam-shaped fixing plate and the two sheets sandwiched between the heating plate beam and the beam-shaped fixing plate are not completely bonded.

In order to correct these pressure unevenness, a packing sheet was sandwiched between the I-beam and the heating plate beam, and the thickness thereof was partially changed. Is several meters or more and the temperature is heated to a hundred and several tens of degrees, so that it is extremely difficult to adjust the thickness of the packing sheet. According to the present invention, even if the hot platen beam is stretched, the wave does not move, and the conventional thickness adjustment by the packing sheet is unnecessary.

[0005]

SUMMARY OF THE INVENTION A pressure press according to the present invention has two sheets between a horizontally long beam-shaped fixed plate and a horizontally long beam-shaped movable plate that moves up and down above the fixed plate. In a pressure press that presses the moving plate downward by stacking the two, a lifting beam that moves up and down by driving is provided above the moving plate, and a large number of weights having the same shape as the lifting beam are provided. It is characterized in that they are arranged side by side so as to have a slight gap between adjacent weights at equal pitches and are suspended, and the moving plate is pressed by the weight of the weights when the lifting beam descends.

It is preferable that the movable plate does not require high rigidity unlike the conventional I-beam, but is rather thin, has low rigidity, and is easily bent vertically. Then, this moving plate can be attached along the lower surfaces of a large number of parallel weights and can be moved up and down together with the weights, or can be separated from the weights and moved up and down by another lifting means. However, when it is attached to the lower surface of the weight, the moving plate can slide in the length direction.
Further, a heater can be built in the moving plate, and a heating plate can be attached to the surface of the moving plate so as to be slidable in the length direction.

[0007]

When the movable plate is at the upper standby position, the two sheets to be heat-bonded are placed on the lower fixed plate in a stacked manner, and then the movable plate is lowered to place the movable plate on the sheet. When the weight is placed on top of the other, the moving plate is strongly pressed onto the sheet by the action of gravity applied to the weight. in this case,
The weights of the same shape ride on the moving plate at the same pitch, and the moving plate is slidable with respect to the lower surface of the weight, so the moving plate is slightly curved up and down or fixed due to heating or the like. Even if the plate is slightly curved up and down for some reason, the pressure distribution becomes uniform.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 10 designates a laterally long lower frame on which a beam-shaped fixing plate 11 is fixed. On the other hand, two elevating beams 21 and 22 made of I-beams are arranged in parallel above the fixed plate 11 at a predetermined interval (see FIG. 2), and both ends thereof are connected by end fittings 23 made of I-beams. Then, a rectangular frame is formed when viewed from above.

A triangular drive arm 24 is fixed to the outer surface of the end fitting 23 in an obliquely upward direction.
Is connected to the tip of a piston rod 26 of a hydraulic cylinder 25 suspended from the upper frame 30, and the operation of the hydraulic cylinder 25 raises and lowers the elevating beams 21 and 22. Further, a lower suspension bar 27 is provided on the end fitting 23 so as to project upward, and an upper suspension bar 28 is provided on the upper frame 30 so as to project downward, and they are provided at the upper end of the lower bar 27 and the lower end of the upper bar 28, respectively. By inserting the clamp pin 29 into the pin hole, the upper and lower bars 27, 28
Is detachably connected, and the lifting beams 21 and 22 are fixed to the upper end of the lifting stroke of the hydraulic cylinder 25.

A large number of plate-like weights 31 having a T-shaped section (see FIG. 2) whose lower surface is horizontally formed between the above-mentioned front-side elevation beams 21 and rear-side elevation beams 22, and adjacent plate-like weights 31. , 31 are arranged at intervals such that a slight gap is generated between them, and the head 32 of this weight 31 is moved forward and backward.
By being hooked on the upper surfaces of Nos. 1 and 22, they are supported in a suspended manner. Then, the weight 31 has the support bar 34 inserted through the vertical long holes 33 formed at two upper and lower positions in the center of the width direction, and the front end thereof is the front elevation beam 21 and the rear end thereof is the rear elevation. By fixing the weights 31 to the beams 22, the weights 31 are held at a uniform arrangement pitch that enables individual lifting and lowering.

On the other hand, along the lower surface of the large number of weights 31, a moving plate 35 having a square cross section including an electric heater and a heat insulating plate.
Are brought into contact with each other, and the moving plates 35 are hooked and supported by receiving metal fittings 36 fixed to the front and rear surfaces of every other weight 31 so that the moving plates 35 can slide in the longitudinal direction.

In the above structure, the ends of the rubber sheets Sa and Sb to be spliced together are placed on the lower fixing plate 11 and the lower bar 27 and the upper bar 28 for suspension which are located above are connected. Pull out the clamp pin 29,
After that, when the left and right hydraulic cylinders 25 are operated and the pistol rod 26 is projected downward, a pair of front and rear lifting beams 21 and 2 are provided via the drive arm 24 and the end fitting 23.
2 descends, and with this descending, a large number of weights 31 suspended on the elevating beams 21 and 22 descend.

Then, before the lifting beams 21 and 22 reach the lower end of the lifting stroke, the moving plate 35 below the weight 31 is moved.
Reaches the rubber sheets Sa, Sb on the fixed plate 11, and the weight of the weight 31 uniformly presses the rubber sheets Sa, Sb,
At the same time, it is heated and bonded by a heater. At this time, the fixed plate 1
If the upper surface of 1 is slightly curved up and down, the moving plate 35
Is curved according to the shape of the fixed plate 11 by the action of the weight 31,
When the moving plate 35 expands as the temperature rises, lateral sliding occurs between the moving plate 35 and the weight 31 to cause the moving plate 3 to move.
5 is prevented from floating, and uniform pressurization is always achieved.

When the thermal bonding is completed in this way, the hydraulic cylinder 25 is driven in the opposite direction, the lifting beams 21 and 22 are pulled up to the standby position via the piston rod 26,
The moving plate 35 moves up together with the weight 31 to move the rubber sheet Sa,
Move away from Sb. Then, when the upper end of the ascending stroke is reached and the respective pin holes of the lower bar 27 and the upper bar 28 for suspension are aligned, the clamp pin 29 is inserted into the aligned pin holes, and the lifting beams 21, 22 and the weight 31 are inserted.
The accidental drop of the is prevented.

In the above embodiment, the lifting beam 21,
Guides may be provided at the left and right ends of the elevating beams 21 and 22 for preventing the left and right or front and rear swings of the 22. In the above-described embodiment, the lower part of the weight 31 is inserted between the front and rear two elevating beams 21 and 22, and the head 32 is hung on the upper surfaces of the elevating beams 21 and 22. It is also possible to form a horizontal hole in 31 and insert one lifting beam into this horizontal hole. Further, the hydraulic cylinder 25 for raising and lowering the elevating beams 21 and 22 may be provided below the elevating beams 21 and 22. Further, the clamp pins 29 on both ends of the lifting beams 21 and 22 can be attached and detached by a mechanical force of an air cylinder or the like.

[0016]

As explained above, according to the present invention, two sheets are superposed and sandwiched between a horizontally long beam-shaped fixed plate and a horizontally long beam-shaped movable plate which moves up and down thereabove. A lifting beam is provided above the moving plate, a large number of weights are suspended on the lifting beam, and the moving plate is pressed by the weight of the weight when the lifting beam descends. Therefore, the fixed plate (press bed), the moving plate (hot plate beam), the fixed beam on the upper part, etc. are curved by the reaction force like the conventional device that pressurizes with a large number of hydraulic cylinders arranged in parallel, There is no wavy curve due to the temperature rise of the moving plate. Then, since a large number of weights arranged at equal intervals are placed on the moving plate by their own weights, the object of thermal bonding is uniformly pressed over the entire length, and the troublesome adjustment work by inserting the packing required in the past is performed. It is unnecessary, and the weight of the fixed plate, the movable plate, and the upper and lower frames can be reduced as compared with the conventional device.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

 10: Lower frame 11: Beam-shaped fixing plate 21, 22: Elevating beam 23: End fitting 24: Drive arm 25: Hydraulic cylinder 26: Piston rod 27: Lower bar for suspension 28: Upper bar for suspension 29: Clamp pin 30: Upper frame 31: Weight 32: Head of weight 33: Long hole 34: Support bar 35: Moving plate 36: Receiving metal fitting Sa, Sb: Rubber sheet

Claims (1)

[Claims] 1. A two-sheet sheet is superposed and sandwiched between a horizontally long beam-shaped fixed plate and a horizontally long beam-shaped movable plate that moves up and down above the fixed plate, and the movable plate is applied downward. In the pressure press adapted to apply pressure, an elevating beam that is driven up and down is provided above the moving plate, and a large number of weights having the same shape as the elevating beam are arranged at an equal pitch and slightly between adjacent weights. The pressure press is characterized in that the movable plate is pressed by the weight of the weight when the elevating beam descends.