JPS609674Y2 - Vacuum drying equipment for leather - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a leather vacuum drying device for drying leather.

Conventionally, as this type of device, for example,
The one described in Publication No. 471 is known.

In this device, a lid is movable up and down on a hot plate on which skins to be dried are placed, and when the lid is lowered onto the hot plate, a lower chamber is formed in the lid which communicates with a vacuum pump. At the same time, the peripheral edge of the rubber plate is fixed to the inner ceiling of the lid so that the center part curves under its own weight, and a thin (low height) ) By forming a gap and communicating this gap with a vacuum pump to adjust the vacuum pressure in the gap to an arbitrary pressure, the leather was dried while being pressed at an arbitrary pressure of 0 to 1 kg/cJ. It is characterized by several points.

However, in this conventional device, when attaching the rubber plate to the inner ceiling of the lid, it is attached at the peripheral edge of the rubber plate, so the vacuum state is different between the edges and the center, and the relationship between the lid and the heating plate is different. There is a disadvantage that it is necessary to provide an additional rubber material to completely seal the lower chamber between the two.

Further, although this conventional device employs felt or the like as the pressing mechanism, it is difficult to actually tension the felt uniformly, and it also has drawbacks such as requiring a large amount of time to dry.

In current actual leather drying work, there is no problem even if the leather is pressed at atmospheric pressure (or higher) when drying the leather, and the inventors of the present invention have used Even when using the apparatus shown in FIG. 1 of Publication No. 19471, the work was carried out without adjusting the gap pressure (with the gap pressure being atmospheric pressure), and no problems were found.

Based on these facts, the present invention aims to provide a vacuum drying device for leather that eliminates the drawbacks of the conventional device as described above. When the rubber sheet is directly attached to the frame (lid), the leather is pressed with a constant pressure of atmospheric pressure (or higher) during drying, and a spring sheet and a net are placed on the pressing surface, which allows the leather to dry. The feature is that the pressure is uniform and at the same time moisture evaporates smoothly.

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.

In the figure, reference numeral 1 denotes a frame, and the frame 1 is attached to a machine frame 4 so as to be movable up and down above a hot plate 3 on which skins 2 to be dried are placed.

Reference numeral 5 denotes a rubber sheet which is wider than the frame 1 and is attached to the lower surface of the frame 1 at a position inward from its peripheral edge, and the peripheral edge 6 is attached along the inner surface of the machine frame 4. A drying chamber 7 is formed by the rubber sheet 5, the machine frame 4, and the hot plate.

The drying chamber 7 communicates with a vacuum pump 9 via a conduit 8.

Hot water for heating is supplied to the space 10 below the hot plate 3.

Further, a spring seat 11 and a net 12 are attached to the lower side of the rubber sheet 5 in this order from above.

In operation, when the skin 2 to be dried is placed on the hot plate 3 and the frame 1 is lowered, the rubber sheet 5 is also lowered together with it, and the peripheral edge 6 of the rubber sheet 5 is brought into close contact with the upper surface of the hot plate 3, and the drying chamber is closed. 7 is sealed in a sealed manner.

At this time, the skin 2 has a spring seat 11 mesh 12
(The pressing force is the same as that of the frame 1.)
(This is a differential pressure between the atmospheric pressure acting on the top surface and the drying chamber 7), but due to the elasticity of the spring seat 11, the skin 2
The surface of the skin 2 can be pressed evenly, and the water evaporating from the skin 2 can be smoothly removed through the mesh 12.

In this way, in the device of the present invention, the rubber sheet is attached to the frame and there is no gap in between that creates a vacuum state, so the structure of the device itself is simple, and there is no need to check the vacuum state of the gap each time. This has the advantage of easy operation.

Furthermore, in the conventional device, the skin was pressed with felt, which took a long time for the moisture to evaporate, but in the device of the present invention, the pressing body is composed of a spring sheet and a net as described above, so evaporation is smooth. You will be able to do this.

In addition, since the peripheral edge of the rubber sheet is in close contact with the hot plate, the disadvantages of the conventional technology such as no need for any other rubber members can be overcome, and the practical effects of the device of the present invention are remarkable. It is.

[Brief explanation of drawings]

The figure is a side sectional view of the device of the present invention, and FIG.
FIG. 2 is a sectional view showing a state in which the frame is moved upward and the pressure on the skin is released. 1...Frame, 2...Skin, 3...
・Hot plate, 4...Machine frame, 5...Rubber sheet, 6...Peripheral section, 7...Drying room, 9
... Vacuum pump, 11 ... Spring seat, 12 ... Net.

Claims (1)

[Scope of utility model registration request] A frame is attached to the machine frame above the hot plate on which the leather to be dried is placed so that it can move up and down, and a rubber sheet that is wider than the frame is attached to the bottom surface of the frame at the periphery of the rubber sheet. At the same time, the peripheral part is suspended along the machine frame to form a drying chamber by the rubber sheet, the machine frame, and the hot plate, and the drying chamber is connected to a vacuum pump via a conduit, and the bottom side of the rubber sheet is A vacuum drying device for leather, in which a spring sheet and a net are fixed in this order from above, so that when the frame is lowered, the peripheral edge of the rubber sheet comes into close contact with a hot plate.