JPH0436884Y2 - - Google Patents

Description

[Detailed Description of the Invention] This utility model relates to a holeless Ogalite molding machine for Ogalite, which is a solid fuel produced by heating and compression molding sawdust. Conventionally, Ogalite has a gas release hole inside Ogalite during processing and molding, and gas is generated due to thermal decomposition, but if this gas does not escape, it will explode and Ogalite will fly out like a gun ball, resulting in continuous molding. This was impossible, and it was taboo for ogarite producers to plug the holes.
However, by providing a hole, the gas hole would become clogged with carbonized powder during Ogarite molding, causing a fire that all manufacturers in the Ogarite industry can be said to have experienced fires.

When ogalite is carbonized in a carbonization pot to produce ogre charcoal, the difference in diameter between the outer surface of ogalite and the inner surface of the hole causes a difference in shrinkage, which causes deformation of ogre charcoal.

When charcoal is burnt, the holes increase the contact area with air, causing it to burn faster and make the fire last longer.

When taking out the burning Ogalite from the carbonization furnace and extinguishing it with eraser powder, it took time to extinguish the inside of the hole.

Eraser powder got stuck in the hole, and it was necessary to remove the eraser powder.

Due to these drawbacks, holeless ogalite had been long awaited in the industry, but had not yet appeared.

In order to eliminate these drawbacks, the present invention devises a holeless ogalite molding machine. An embodiment of this invention will be described with reference to the drawings.

The guide rod for forming the gas vent hole in the conventional compression screw shown in the dotted line in Figure 4 has been removed, and a compression screw with a gentle slope and a rounded shaft end can be installed from the tip of the screw blade. Figure 3 is a BB cross section.
As shown in FIG.
A groove is machined in the axial direction on the inner surface to serve as a gas vent hole.

After burning the scraps of Ogarite molded in the heating pot 11 and heating the heating cylinder section, insert the auxiliary round rod into the exchange bush 10 (Fig. 5) using the compression screw,
Turn on the power from the tip of the replacement bushing until it hits the tip of 2, 7, turn the power to 0N, and drive motor 1.
Compression screws 2 and 7 rotate through pulley 2, and dry sawdust is introduced from hopper 4.
The sawdust is moved by the compression screw, and inside the heating cylinder exchange bush 10, the sawdust is thermally decomposed by the frictional heat generated by the heating and rotation of the screw, and is prevented from reaching the auxiliary round rod, so that it is compressed and solidified. do. The auxiliary round rod is used only during startup, and once the sawdust solidifies and fills the exchange bushing cylinder, it becomes unnecessary. When this happens, it will naturally be extruded from the molding machine and the use of the auxiliary round bar will end.

At the tips of compression screws 2 and 7, sawdust and compression screws rub against each other and gas is generated. In the conventional Ogarite molding machine, this generated gas is as shown in Figure 4.
It flows out and is discharged through the center hole of the ogalite through the surface of the gas hole molding guide rod of the compression screw shown by the dotted line, but in the molding machine of the present invention, the center hole is The generated gas flows along the tips of the compression screws 2 and 7, from the center to the inner surface of the exchange bushing 10, and is discharged to the outside through grooves machined in the axial direction on the inner surface.

The grooves formed in the exchange bushing 10 are also clogged with sawdust and try to solidify, but since the compressive axial force in the grooves is weak, it is blown away by the generated gas pressure. This is because when sawdust solidifies into sawdust inside the replacement bushing cylinder, the generated gas pressure generates enough explosive force to expel and move the solidified sawdust, and the sawdust solidifies in the grooves where the solidification is weak. The gas is blown away in the axial direction and the gas pressure is weakened, allowing continuous molding without hindrance to the solidified ogalite body. Figure 6 is a photograph of a molded Ogalite with no holes.The white part in the axial direction seen on the outer surface in this photograph is the trace of gas leakage caused when gas passes through the grooves, and this is the only part that is not carbonized.

At the center of the tips of the compression screws 2 and 7, there is no force to push out the sawdust in the axial direction, so the sawdust clumps weakly, but the inner diameter on the pulley side of the replacement bushing 10 is tapered, and the tapered diameter pushes the sawdust toward the center. It can generate a force of , and harden the sawdust in the center. In addition, although the tip of the compression screw does not have a pushing force, it generates frictional heat between it and the sawdust that acts as a barrier, that is, in the cross section of the sawdust, and the contact surface can be larger than that of the conventional screw blade alone, resulting in thermal decomposition. This makes it easy to manufacture hard ogalite.

As described above, it is possible to continuously mold and manufacture holeless ogalite simply by improving the compression screw and exchange bush in the heating cylinder of the molding machines currently in use in the industry.

Not only can the above-mentioned drawbacks be covered by producing Ogalite without holes, but if Ogalite without holes is burnt to produce Oga charcoal without holes,
The appearance is similar to traditional charcoal, but it is more like charcoal. Furthermore, when Ogarite is used as a fuel for heating a bath at home, conventional Ogarite with holes has the disadvantage that the outer surface and inner surface of the hole are carbonized, and the ignition temperature at the carbonized part of the surface is higher than that of sawdust, making it difficult to ignite. However, since the holeless ogalite produced according to the present invention has exposed areas of the sawdust surface where gas leaks, it is easier to ignite than conventional ogalite.
Furthermore, even when it is placed in a ``oki'' after burning, there are no holes, so the fire lasts longer, making it a better firewood.

[Brief explanation of the drawing]

Figure 1: Side view, Figure 2: A-A sectional view, Figure 3
...B-B sectional view, Figure 4...Compression screw, 2
Dimensions, Figure 5...Auxiliary round bar. Main parts: 1...Motor, 2...Pulley,
3...Molding machine main body, 4...Hopper, 5...Compression screw, 1, 6...Introduction guide tube, 7...Compression screw, 2, 8...Exchange guide tube, 9...Heating tube, 10... ...Replacement bush, 11...Heating pot, 1
2...Dostor.

Claims (1)

[Scope of utility model registration request] At the tip of the sawdust extrusion and compression screw,
This Ogarite molding machine uses a compression screw without a guide rod to form gas vent holes, and also has gas vent grooves in the axial direction on the inner surface of the exchange bushing inside the heating cylinder.