JPS6325115Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Technical field of invention) This invention relates to a porous body cutting device.

(Technical background of the invention and its problems) A porous body, for example, a polyvinyl acetal (hereinafter referred to as PVAt)-based porous body, is made of polyvinyl alcohol (hereinafter referred to as PVA) in the presence of a pore-forming aid.
Let aldehyde and acid act on an aqueous solution of
It is produced by acetalizing PVA at a temperature of 40 to 90°C for 4 to 40 hours, usually 8 hours or more, but the above reaction stock solution is usually made of vinyl chloride, ABS resin, and other plastics. ,wooden,
It is poured into a box, cylinder, or other container made of metal such as stainless steel or brass and undergoes heat treatment. The reaction stock solution poured into the container is heated and reacted for about 18 hours in a reaction bath heated to about 60°C, so that a solidified porous body is formed.

FIGS. 8A to 8D show the processing steps of the porous body 3 formed by a heating reaction, and the porous body 3 of a predetermined shape (usually a cube of about 70 volumes) formed by reaction in a container. is taken out from the container by a lifting device 4 such as a crane or hoist, and several porous bodies 3 are placed in a cooling tank 2 containing water 1 with a water temperature of about 20°C.
is placed and left to cool. And cooling tank 2
The porous body 3 that had been cooled for about 6 hours was lifted out of the cooling tank 2 by the lifting device 4, and placed in a centrifugal dehydrator 5 as shown in FIG. 8B for dehydration, where it was centrifugally dehydrated. Thereafter, it is placed on a conveyance mechanism 6 as shown in FIG. 3C, and sliced into a predetermined thickness by a slicer 7. This sliced thin porous body 3A is conveyed between a large number of rollers 8 as shown in FIG. Thereafter, the material is put into a centrifugal dehydrator 5 as shown in FIG. 5B again to be dehydrated and then shipped as a porous product.

In this way, conventional PVA-based porous materials are cut by cooling the reaction-produced porous material below room temperature and completely removing moisture from the pores using a centrifugal dehydrator, etc. When a porous body has a large capacity, it takes time to cool it, and it cannot be cooled uniformly, so the reaction progresses in the center of the porous body, resulting in a non-uniform porous body. .
Furthermore, if an external force is applied to the porous body while it is still warm, for example, if it is taken out of the cooling tank while it is still warm, the shape of the porous body will be distorted due to its own weight, and this distortion will become permanent distortion, resulting in slicing. Furthermore, when thinly slicing an elastic porous material, the sliced material does not move smoothly on the blade holder, causing a so-called "shiyakuri" phenomenon, and changes in movement speed may cause the resistance on the blade to increase. This caused slicer marks and scratches on the product.

(Purpose of the invention) This invention was made in view of the above-mentioned circumstances, and it is an object of the present invention to stably and reliably slice even a large-capacity porous material to a predetermined thickness. It is an object of the present invention to provide a cutting device that does not cause any damage or damage to the slicer.

(Summary of the invention) The present invention relates to a device for slicing a porous body to a predetermined thickness and cutting it into small volume porous bodies, and relates to a tank for storing liquid and a device for slicing a porous body to a predetermined thickness to cut the porous body into small volume porous bodies. It consists of a bottom plate that moves up and down, and immerses the porous body in a tank in which the liquid is stored,
a supply means placed on the bottom plate and raised to the bottom plate by a predetermined amount for each slice; and a supply means that is wound around a drive roller and endlessly rotated in a direction perpendicular to the slicing direction, and has one end that bites into the porous body. A sharp slice belt is disposed above the slice portion of the slice belt so as not to cover the one end side thereof, and the porous body sliced by the slice belt is peeled from the slice belt. The holding member is inclined so that the holding member is inclined so that the holding member is provided with a nozzle for ejecting fluid at a midway portion of the inclination.

(Example of the invention) In this invention, even a large-volume porous body is sliced in a state where no compressive deformation occurs due to its own weight, and the sliced small-volume porous body is washed with water and cooled as it is. Make it. For this purpose, a large-capacity porous body is floated in water, and its buoyancy eliminates compressive deformation due to its own weight, and when cutting, only the cut portion is exposed above the water surface, making it easy to slice.

FIG. 1 shows an example of an apparatus to which the cutting apparatus of this invention is applied, in which a porous body 20 is heated and reacted in a large-capacity (for example, 1700 volume) reaction vessel.
is immersed in the water 11 in the container 10 and receives buoyancy, so that the porous body 20 is prevented from compressive deformation due to its own weight inside the container 10. Further, the heated porous body 20 is placed in the container 1.
It is placed on a bottom plate 13 provided at the bottom of 0, and this bottom plate 13 is moved up and down by a lifting mechanism 12. Furthermore, a cutting device 30 (described later) is provided above the container 10, and the porous body 20 is reliably sliced into a predetermined thickness by this cutting device 30, and the thin porous body 20 that has been sliced is is a conveyance mechanism 22 consisting of a belt, etc.
is sent to the cooling shower section 23 by the water sprinkler 2.
The core is cooled to a predetermined temperature by low-temperature water discharged from 4, and then sent to a centrifugal dehydrator 40 as shown in FIG. 2, where it is dehydrated. .

Here, the structure of the cutting device 30 for slicing the porous body 20 into a predetermined thickness is as shown in FIGS. A slicing belt 33 made of metal or the like is wound around the slicing belt 33 and is rotated by the cutting device 30. The structure is such that when the porous body 20 enters in the direction A, its sharp end digs into the side surface of the porous body 20 without creating a recess. Further, at the rear of the sliced portion of the slice belt 33, a pressing member 50 whose cross-sectional structure is shown in FIG. It has an inclined surface 51 in the vertical direction so that it is peeled off from the mass body, smoothly sent backward, and sent to the conveyance mechanism 22. Furthermore, a circular nozzle 5, for example, is provided in the middle of the inclined surface 51 of the pressing member 50.
1 are connected to the feed pipe 54, and a fluid 53 such as air or water is ejected from the feed pipe 54 in the delivery direction.

In such a structure, the porous body 20 heated and reacted in the container 10 rests on the bottom plate 13,
Normally, the porous body is completely immersed in the water 11 by the lifting mechanism 12, and after the predetermined heating reaction operation is completed, the lifting mechanism 12 is operated to raise the bottom plate 13 to a predetermined height. The upper part of the porous body 20 is brought out from the liquid level of the water 11, and the side surface of the porous body 20 is positioned in front of the cutting device 30. In this state, the slicing belt 33 is rotated endlessly by driving the roller 31 or 32 with a drive source such as a motor, and the slicing belt 33 is rotated endlessly by entering the cutting device 30 in the direction A of the porous body 20.
The sharp tip of the holder bites into the porous body 20, and as it advances, the sliced porous body 20 is peeled off from the main body, further peeled off along the slope of the inclined surface 51 of the holding member 50, and transferred in the direction of the conveyance mechanism 22. will be sent smoothly. In this case, a fluid 53 such as air or water is ejected from the feed pipe 54 from the multi-nozzle 52 (even if it is a thin porous material, development cannot occur), so that the porous pores are sliced more smoothly. The mass body 21 can be sent backward. The thin porous body 21 sliced by the cutting device 30 in this manner is sent to the cooling shower section 23 by the conveyance mechanism 22, and the entire body is cooled to a predetermined temperature by water sprinkling from the sprinkler 24. Ru.

In this way, when one sliced porous body 21 is sent to the cooling shower section 23, the cutting device 30 once retreats in the direction B and returns to the original standby position, and the lifting mechanism 12 moves the bottom plate 1 is raised to a predetermined height again, and the top of the porous body 20 is brought out from the liquid level of the water 11 in order to slice it into a predetermined thickness.
The same slicing as described above is performed by moving the cutting device 30 in the direction A again.

In this case, since the portion of the porous body 20 other than the portion to be sliced is immersed in the water 11, the porous body 20 is not compressively deformed by its own weight even when it is not cooled, and the cutting device By repeating the above-described operations of 30, it is possible to reliably slice to a predetermined thickness. In addition, since it is cooled after being sliced thinly, it can be completely cooled down to the center.

In the above-described embodiment, the presser members 50 having sloped surfaces are disposed above and below the slice belt 33, but as shown in FIG. Part 5
0A may be provided. In addition, the inclined surface 5
The shape, number, etc. of the nozzles 52 arranged in 1 can be arbitrarily designed.

(Effects of the invention) As described above, according to the cutting device of this invention, the porous material to be sliced can be sliced while being held in its normal shape by the buoyancy of water. Porous bodies can also be sliced reliably and quickly. Further, since the cutting device uses a slicing belt that rotates endlessly and a presser member is provided nearby, it is possible to reliably and stably slice various thicknesses.

[Brief explanation of drawings]

Figures 1 and 2 are diagrams for explaining the state of the method for producing a porous body, Figure 3A is a plan view of the cutting device of this invention, Figure B is its front view, and Figure 4 is this. FIG. 5 is a cross-sectional structural diagram of the cutting device, FIG. 5 is a cross-sectional structural diagram of the holding member, FIG. 6 is a partial plan view of the holding member, and FIG.
The figure is a cross-sectional structural diagram showing another example of the holding member, and FIGS. 8A to 8D are diagrams for explaining the conventional manufacturing process of a porous body. 1,11...Water, 2,10...Container, 3,20
... Porous body, 4 ... Lifting device, 5, 40 ... Centrifugal dehydrator, 6, 22 ... Conveyance mechanism, 30 ... Cutting device, 31, 32 ... Roller, 33 ... Slice belt, 50 ... ...Press member.

Claims (1)

[Scope of utility model registration request] A cutting device for slicing a porous body into thin porous bodies, comprising a tank for storing a liquid and a bottom plate that moves up and down within the tank in which the liquid is stored,
a supply means for immersing the porous body in a tank in which the liquid is stored and placing it on the bottom plate to raise the bottom plate by a predetermined amount for each slice; a slicing belt that is rotated endlessly in a direction perpendicular to the porous body and has one sharp end that bites into the porous body; and a presser member that is inclined so as to separate the porous body sliced by the slice belt from the slice belt, and is provided with a nozzle for ejecting fluid at a midway part of the slope. A porous material cutting device characterized by: