SU137986A1 - Dryer for drying hard skins - Google Patents

Description

Known dryers for drying hard leathers that have a chamber, a device for heating and circulating air, supply and removal of skin conveyors, devices for automatically loading and unloading leather into the chamber, a conveyor for moving poles with skins in the dryer, and a drive are complex. by design.

In the described dryer, to simplify the design, conveyor belts are used, consisting of three separate endless belts between which there are gaps, and devices for automatic loading and unloading of leather into the chamber are made in the form of vertical swinging rods equipped with pneumatic cylinders that interact with their rods grabs. The pegs for the skin curtain are rigidly fixed on the conveyor to move them and are provided with clamps that hold the skin after it has been fed by the grippers of the shells and when moving it in the dryer. For placing the dried skin on the outlet conveyor of the rod, devices for automatic unloading are mounted on the shaft of the outlet conveyor with the possibility of passing them into the gaps between the conveyor belts. The clamps for holding the leathers on the staves are made in the form of a figured lever kinematically interconnected and two strips interacting with the skin and provided with gear wheels meshing with each other. One of these wheels is connected to the end of the torsion spring through a system of levers, the figured lever, when opening the plates, interacts with cams installed at the beginning and at the end of the conveyor to move the poles in the dryer. To fix the moment of entry of the front edge of the skin into the opened grips of the rods, photo cells were mounted mounted in the gaps between the belts of the supply conveyor and located near each gripper. Reliable removal of the leathers is ensured by the fact that the straps for automatic unloading of the leathers are mounted on the shaft of the discharge conveyor with some inclination inside the chamber, springed in the direction of the movement of the leathers and

No. 137986-2 are equipped with a limit switch that gives a signal to close the grippers when another skin approaches the rods and deflects them to the vertical position.

FIG. 1 shows a dryer; in fig. 2 - boot device; in fig. 3 - clamps for skin retention; in fig. 4 is a view along arrow L of FIG. 3; in fig. 5 - cams; in fig. 6 - unloading device.

The dryer for drying hard leathers consists of a chamber / s with a device for heating and circulating air, three-belt supply 2 and 3 4 conveyors, 3 conveyor 5 for mixing poles 6 with leather, devices 7 and 5 for automatic loading and unloading and driving 9 .

The skin to be dried is supplied by the conveyor 2 to the device 7, and at the moment when the leading edge 10 of the skin passes under the photo cells / L, the latter will give the appropriate command, after which the conveyor 2 stops, the compressed air enters the cavity 12 of the cylinder 13 installed in the rod 14 device 7, the piston 15 will move up and its rod 16 will rotate the lever 17 of the gripper 18 together with the gear wheel / I At the same time with the gear wheel 19 rotates the gear wheel 20, the halves 21 and 22 of the gripper 18 will close and firmly clamp the skin. After closing the grip, the compressed air will flow into the cavity 25 of the pneumatic cylinder 24 and move the piston 25, the rod 26 of which, coupled to the gear wheel 27, will turn the last together with the cams 28 sitting with the wheel 27 on the same shaft 29. Under the action of the cams 28 on the axis 30, the shaped lever 31 of the skin-holding clamp 32 is rotated on the pole 6, and by means of the pull 33 to the lever 34 two gears 35 and 36 associated with the slats 37 will turn, and the clamp 32 will open. At this moment, the rods 14 will take a horizontal position and transfer the skin 4 to the clamp 32, which will close under the influence of torsion springs 38 with simultaneous supply of compressed air to the cavity 39 of the pneumatic cylinder 24, after which the rods 14 will return to their original position.

The conveyor 5 moves the skin through the chamber /, at the exit of which the skin enters the grippers 40 of the rods 41 of the device 8. When compressed air is fed into the cavity 42 of the pneumatic cylinder 43 installed in the rod 41, the piston 44 will move, the rod 45 of which will turn the clamp 46. Triggering the grips 40 will occur after the skin 4 has turned the rods 41 mounted freely on the shaft 47 of the discharge conveyor 3 with an inclination towards the inside of the camera / in a vertical position. The opening of the clamps 32 after the skin enters the unloading device 8 occurs under the influence of the cams 28 installed at the end 48 of the conveyor 5.

After the rods 41 are rotated to a horizontal position, and they pass into the gaps 49 of the conveyor 3, the skin is released from the grippers 40 and enters the subsequent operation of the technological process. When it passes the photocells 50, the conveyor 3 stops.

Subject invention

Claims (4)

I. Dryer for drying hard leathers, including a chamber, a device for heating and circulating air, conveying and discharging skin conveyors, devices for automatically loading and unloading leathers into the chamber, a conveyor for moving the poles with leathers in the bottle, and an actuator featuring so that, in order to simplify the construction, the feed and discharge conveyors consist of three separate endless belts between which there are gaps, devices for automatic loading into the chamber and unloading of leather from it are made in the form of vertical swinging rods with grippers, fitted with pneumatic cylinders that interact with their rods with grippers, with the poles for hanging the leather rigidly fixed on the conveyor for moving and equipped with clamps holding the grippers and when promoting it in the dryer, and for placing the dried skin on the outlet conveyor of the rod, devices for automatic unloading are mounted on the shaft of the outlet conveyor with the possibility of Walking them in the gaps between the conveyor belts. 2. Dryer according to claim 1, characterized in that the clips for holding the leathers on the poles are made in the form of a figure lever connected to each other kinematically and two interacting with the skin slats, equipped with gears that are in engagement with each other; through a system of levers it is associated with the end of a torsion spring, and the figured lever, when opening the slats, interacts with the cams installed at the beginning and at the end of the conveyor for mixing poles in the dryer. 3. Dryer according to claim 1, characterized in that, in order to fix the moment of entry of the front edge of the skin into the opened grippers of shtang, photocells are used, mounted in the gaps between the belts of the feeding conveyor and located near each gripper. 4. Dryer according to claim 1, characterized in that, in order to ensure reliable leather removal, rods for automatic skin unloading are installed on the shaft of the discharge conveyor with a certain inclination inside the chamber, spring-loaded in the direction of leather movement and equipped with a limit switch to close the grippers at the approach of the next skin to the rods and deflecting them into an upright position. ig. 2 27 29 005.4