JP2003112298A - Compression molding apparatus and its operating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compression molding apparatus having high wear resistance, high resistance to pressure, and excellent durability. SOLUTION: The apparatus for compressing a material to be compressed including slag produced by grinding high speed steel with very high hardness comprises an outer sleeve in which a recipient opening to receive the material to be compressed is formed, and an inner sleeve 42 which has a recipient opening formed at a position corresponding to the recipient opening of the outer sleeve and is fitted in the outer sleeve movably in an axial direction. The lower cylinder 422 of the inner sleeve 42 is formed as a cylindrical body having a double wall having first and second cylindrical bodies 422A and 422B, wherein the first cylindrical body was formed of a material harder than that of the second cylindrical body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compression molding apparatus for compression molding a material to be compressed which can be compression molded, such as various kinds of polishing slag and cutting waste generated in a polishing step or a cutting step, or a powder or granular material. More specifically, the present invention relates to a compression molding device having excellent wear resistance and pressure resistance.

[0002]

2. Description of the Related Art A conventional compression molding apparatus of this type is disclosed in, for example, Japanese Patent Application Laid-Open No. 11-320193. As shown in FIG. 7 (a), the compression molding apparatus described in this publication includes a hopper 1 for introducing a substance W to be compressed such as chips, and a conveying pipe connected to a lower end opening of the hopper 1. The path 2, the screw conveyor 3 that is disposed in the transfer pipeline 2 and is driven by the motor 3A and that is a supply unit that supplies the material W to be compressed, and the transport pipeline 2 that surrounds the screw conveyor 3. A vertical double sleeve 4 whose ends are connected by a receiving port 4A formed on a part of the peripheral surface, and an opening / closing body that opens and closes a lower end discharge port 4B of this sleeve 4 via a hydraulic cylinder 5A. It is provided with a certain gate 5 and a pusher 6 as a pressing body for compression-molding the material W to be compressed in the sleeve 4 closed by the gate 5 via the hydraulic cylinder 6A.

As shown in FIG. 7 (a), the sleeve 4 is fitted with an outer sleeve 41 fixed to a machine body (not shown), and is slidably fitted in the outer sleeve 41 in the axial direction. And an inner sleeve 42. The receiving port 41A of the outer sleeve 41 and the receiving port 42A of the inner sleeve 42 overlap with each other and are formed as the receiving port 4A of the sleeve 4. As shown in the figure, the inner sleeve 42 is formed shorter than the outer sleeve 41 by the stroke of moving up and down when the compression molded body is discharged.

Then, a spring 44 provided outside the outer sleeve 41 and the inner sleeve 42.
The inner sleeve 42 is always urged downward, that is, toward the gate 5 via the. A first rod 44A orthogonal to this is fixed to the upper outer peripheral surface of the inner sleeve 42, and the tip end of the first rod 44A penetrates a long hole 41D formed in the outer sleeve 41. This long hole 41D
Is formed in the axial direction of the outer sleeve 41, and its length is formed according to the stroke size of the inner sleeve 42. A second rod 44B arranged below the elongated hole 41D is fixed to the outer peripheral surface of the lower portion of the outer sleeve 41 in the same manner as the first rod 44A. A spring 44 is stretched between the first rod 44A and the second rod 44B, and the inner sleeve 4 is extended through the spring 44.
2 is always biased downward. The springs 44 are arranged at a plurality of positions at equal intervals in the circumferential direction of the sleeve 4. Further, a ring-shaped stopper 45 having an inner diameter smaller than this inner diameter is fixed to the upper end surface of the outer sleeve 41, and the inner sleeve 42 is prevented from protruding above the outer sleeve 41 by this stopper 45. On the other hand, the lower end of the inner sleeve 42 is regulated by the elongated hole 41D, and the lower end of the inner sleeve 42 and the lower end of the outer sleeve 41 coincide with each other at the lower end.

Therefore, when the material W to be compressed is compression-molded, after the material W to be compressed is put into the hopper 1, the screw conveyor 3 is driven via the motor 3A, and the screw conveyor 3 is conveyed in the conveying conduit 2. When the substance to be compressed W is conveyed through the container 3 and the substance to be compressed W is supplied from the receiving port 4A into the sleeve 4, the substance to be compressed W is stored in the sleeve 4 closed by the gate 5. Then, the pusher 6 is driven via the hydraulic cylinder 6A to compression-mold the material W to be compressed in the sleeve 4.

Subsequently, the pusher 6 is replaced by the hydraulic cylinder 6.
When retracted through A, the compression molded body is pressed against the inner surface of the inner sleeve 42, the inner surface of the gate 5 and the lower surface of the pusher 6, respectively. After being separated, it rises in the outer sleeve 41 against the tensile force of the spring 44. When the pusher 6 is further retracted, the inner sleeve 42 is locked by the stopper 45, and then the pusher 6 is separated from the compression molded body. At this time, the inner sleeve 42 and the compression molded body fall to the gate 5 due to the biasing force of the spring 44 in combination with their own weight. At this time, since the gate 5 has already been separated from the compression molded body, when the hydraulic cylinder 5A is driven, the gate 5 smoothly moves to open the lower end discharge port 4B of the sleeve 4, and the compression molded body moves from the sleeve 4 by its own weight. It drops and is discharged.

Even if the material W to be compressed enters the narrow gap between the outer sleeve 41 and the inner sleeve 42 by repeating the above-described operation, the material W to be compressed does not accumulate between the outer sleeve 41 and the inner sleeve 42. Is disposed outside the sleeve 4, the movement of the inner sleeve 42 is not hindered by the substance W to be compressed, so that the compression molded body can always be smoothly discharged. Further, since the spring 44 is arranged outside the sleeve 4,
The spring 44 can always be easily inspected from the outside.

[0008]

However, in the case of the compression molding apparatus shown in FIG. 7, the compression molding of the material W to be compressed such as a high speed steel polishing slag containing a large amount of coolant water and having an extremely high hardness is performed. Repeatedly, when the material W to be compressed is compressed by the pressing force from the pusher 6, the compression molded body W1
Since an extremely large frictional force acts between the inner peripheral surface of the inner sleeve 42 and the inner peripheral surface of the inner sleeve 42, the inner peripheral surface of the inner sleeve 42 is worn by the compression molded body W1 during molding, and the inner peripheral surface of the inner sleeve 42 is formed as shown in FIG. There is a problem that the compression molded body W1 is scraped off as exaggeratedly shown in (b), a part of the compression molded body W1 enters this portion, and eventually the pusher 6 cannot discharge the compression molded body W1. Further, since the substance W to be compressed contains a considerable amount of liquid components such as coolant water, a dewatering process such as dehydration is performed before compression. However, the substance W to be compressed after the dewatering process has a water content of, for example, about 40%. Therefore, when the substance W to be compressed is compressed, the water content in the compression molded body W1
It is difficult to escape from the inside, and as a result, there is a limit to increase the bulk density of the compression-molded body W1, and furthermore, when the compression-molded body W1 is discharged, the compression-molded body W1 peels off into a thin plate shape and becomes uneven.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a compression molding apparatus having high wear resistance and pressure resistance and excellent durability. Also,
An object of the present invention is to provide a compression molding apparatus and a method of operating the compression molding apparatus which can obtain a stable compression molded article having a high bulk density and which does not fall apart.

[0010]

A compression molding apparatus according to claim 1 of the present invention comprises a supply means for supplying a substance to be compressed,
An outer cylinder formed with a part of the peripheral surface for receiving the substance to be compressed via the supply means, and a reception port corresponding to the receiving port of the outer cylinder are formed with a part of the peripheral surface. An inner cylinder fitted in the outer cylinder so as to be movable in the axial direction thereof, an opening / closing body for opening and closing one end opening of these cylinders, and a member supplied into the inner cylinder closed via the opening / closing body. A press body for compression-molding a compressed substance, wherein the inner cylinder is configured as a multi-walled cylindrical body having at least first and second cylindrical bodies, and a first cylindrical body that comes into contact with the compressed substance is It is characterized in that it is made of a material harder than the second cylindrical body.

Further, in the compression molding apparatus according to the second aspect of the present invention, the supply means for supplying the material to be compressed and the receiving port for receiving the material to be compressed via this supplying means are formed on a part of the peripheral surface. The formed outer cylinder, the inner cylinder formed with a receiving opening corresponding to the receiving opening of the outer cylinder on a part of the peripheral surface, and the inner cylinder fitted in the outer cylinder so as to be movable in the axial direction thereof, An opening / closing body that opens and closes an opening at one end of the tubular body, and a pressing body that compresses and molds the substance to be compressed supplied into the inner cylinder closed through the opening / closing body, are provided at the center of the tip surface of the pressing body. It is characterized in that the peripheral surface is provided with a raised portion whose diameter is gradually reduced.

According to a third aspect of the present invention, in the compression molding apparatus according to the second aspect, the inner cylinder is a multi-wall cylinder having at least first and second cylinders. In addition, the first cylindrical body that comes into contact with the substance to be compressed is made of a material harder than the second cylindrical body.

A compression molding apparatus according to a fourth aspect of the present invention is the compression molding apparatus according to the first or third aspect of the invention, in which the inner cylinder is at least divided into an upper cylinder and a lower cylinder and these are connected to each other. In addition, the lower cylinder is configured as a multi-wall cylinder having at least first and second cylinders, and the first cylinder that comes into contact with the substance to be compressed is harder than the second cylinder. It is characterized by being formed by.

Further, the compression molding apparatus according to claim 5 of the present invention is any one of claim 1, claim 3 and claim 4.
In the invention described in the paragraph 1, the first cylinder is configured to be attachable to and detachable from the second cylinder.

Further, in the compression molding apparatus according to claim 6 of the present invention, the supply means for supplying the substance to be compressed and the receiving port for receiving the substance to be compressed via this supplying means are formed on a part of the peripheral surface. The formed outer cylinder, the inner cylinder formed with a receiving opening corresponding to the receiving opening of the outer cylinder on a part of the peripheral surface, and the inner cylinder fitted in the outer cylinder so as to be movable in the axial direction thereof, In a method for operating a compression molding device comprising an opening / closing body that opens and closes one end opening of a tubular body, and a pressing body that compresses and molds a substance to be compressed supplied into the inner cylinder closed through the opening / closing body, After the substance to be compressed in the inner cylinder is pressed and compressed through the pressing body, the pressing body is held in the compressed state for a predetermined time.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the embodiments shown in FIGS. Incidentally, FIG. 1 is a view showing an inner sleeve of an embodiment of the compression molding apparatus of the present invention.
Is a cross-sectional view showing a state in which the upper cylinder and the lower cylinder are separated, (b) is (a)
2 is a plan view from above, FIG. 2C is a plan view from below, FIG.
[Fig. 6] is a view showing a tip end portion of a pusher of another embodiment of the compression molding apparatus of the present invention, (a) is a sectional view of the portion, and (b).
Is a plan view from below, FIG. 3 is the pressing force of the pusher and the bulk of the compression molded body when the cutting waste is compression molded using the compression molding apparatus equipped with the inner sleeve shown in FIG. 1 and the pusher shown in FIG. It is a figure which shows the relationship of density, (a) is a graph when pressing force is hold | maintained for 2 seconds, (b) shows pressing force 4
FIG. 4 is a graph showing the difference in compression molding action between the compression molding apparatus equipped with the tip shown in FIG. 2 and the conventional compression molding apparatus having a flat tip as shown in FIG. Is held for 2 seconds, (b) is a graph when the pressing force is held for 4 seconds, and FIG. 5 is a cutting process using a compression molding apparatus equipped with the inner sleeve shown in FIG. 1 and the pusher shown in FIG. It is a figure which shows the relationship between the pressing force of a pusher at the time of compression-molding waste, and the spring back amount of a compression-molding body, (a) is a graph when pressing force is hold | maintained for 2 seconds, (b) is pressing force for 4 seconds. Graph when held,
FIG. 6 shows the relationship between the charging time, the pressing force holding time, and the bulk density of the compression-molded body when compression-molding cutting chips using the compression-molding apparatus equipped with the inner sleeve shown in FIG. 1 and the pusher shown in FIG. It is a graph shown.

The compression molding apparatus of this embodiment is used, for example, in the case of compression molding a high-speed steel polishing slag (in the form of cotton) as a substance to be compressed, except for the inner sleeve 42 and the pusher 6. It is configured according to the conventional compression molding apparatus shown in FIG. Therefore, the inner sleeve 42 and the pusher 6 which are the characteristic parts of the compression molding apparatus of this embodiment will be mainly described below. The inner sleeve 42 used in the compression molding apparatus of the present embodiment is mainly composed of, for example, an upper cylinder 421 and a lower cylinder 422 which are vertically divided into two as shown in FIG. The upper cylinder 421 is formed as a thick-walled cylinder.
A receiving port 42A for the substance W to be compressed is formed on the peripheral wall of the upper cylinder 421.

As shown in FIG. 1B, the peripheral wall of the upper cylinder 421 has a through hole 421 that vertically penetrates the peripheral wall.
A is formed at four locations in the circumferential direction at regular intervals, and long-shaft bolts (not shown) for connecting the upper cylinder 421 and the lower cylinder 422 are attached to these through holes 421A. ing. Further, bolt holes 421B in the radial direction are formed at four locations at equal intervals in the circumferential direction on the upper part of the peripheral wall of the upper cylinder 421, and springs that constantly urge the inner sleeve 42 downward in these bolt holes 421B ( FIG. 7A
The first rod 44A for connecting (see) is attached. A concave portion 421C is formed over the entire circumference at the inner peripheral edge of the lower end surface of the peripheral wall of the upper cylinder 421.
21C is adapted to be fitted to the upper end surface of the peripheral wall of the lower cylinder 422 when connecting the upper cylinder 421 and the lower cylinder 422 as described later.

The lower cylinder 422 has a first cylinder 422A and a first cylinder 422 as shown in FIG. 1 (a).
It has a second cylindrical body 422B having a diameter larger than A. The inner diameter of the first cylinder 422A is formed to have the same size as the inner diameter of the upper cylinder 421. The outer diameter of the first cylindrical body 422A is the second
The second tubular body 42 so as to be tightly fitted to the tubular body 422B of
It is formed to have a size substantially matching the inner diameter of 2B. In addition, bolt holes 422C corresponding to the through holes 421A of the upper cylinder 421 are formed at four positions on the upper end surface of the peripheral wall of the second cylindrical body 422B, and the long shaft bolts penetrating the upper cylinder 421 are screwed into the bolt holes 422C. Then, the upper cylinder 421 and the lower cylinder 422 are connected. However, in FIG. 1, only one bolt hole 422C is shown. Further, the inner peripheral edge portion of the upper end surface of the peripheral wall of the second cylindrical body 422B has a protrusion 422D over the entire circumference.
Is formed, and the projection 422D and the recess 421C of the upper cylinder 421 are fitted together. Therefore, in the state where the first tubular body 422A and the second tubular body 422B are tightly fitted, the lower end surfaces of the first and second tubular bodies 422A and 422B are aligned and the upper end surface of the first tubular body 422A is It coincides with the protruding portion 422D of the second tubular body 422B. And the upper cylinder 4
21 and the lower cylinder 422 are connected via a long-axis bolt, the end surface of the recess 421C of the upper cylinder 421 and the first cylinder 422A.
And the upper end surface of the second cylindrical body 422B and the protruding portion 422D of the second cylindrical body 422B abut.

Further, the first cylinder 422A is the second cylinder 4
22B is formed of a metal material having high wear resistance and high hardness. The first tubular body 422A is configured to be attachable to and detachable from the second tubular body 422B.
It can be extracted from the second cylindrical body 422B at a pressure of up to 300 Kg / cm ² and can be replaced appropriately. Second tubular body 42
Since 2B does not come into contact with the substance W to be compressed, the first cylinder 42
It is made of steel having lower wear resistance than 2A.
In this respect, the upper cylinder 421 is similar to the second cylinder 422B. For example, the first cylinder 422A is formed of SHK (high speed tool steel: JISG4403) and the like, and the second cylinder 422B and the upper cylinder 421 are formed of SCM (chromium-molybdenum steel: JISG4105) and the like.

Therefore, the first cylindrical body 422A is heated under heating.
By inserting the above into the second cylindrical body 422B, it is possible to integrate these both 422A and 422B as the lower cylinder 422. Next, with the long-shaft bolt attached to the through hole 421A of the upper cylinder 421, the concave portion 4 of the upper cylinder 421 is
After inserting 21C into the protrusion 422D of the lower cylinder 422,
The upper cylinder 421 and the lower cylinder 422 can be integrated as the inner sleeve 42 by screwing the long shaft bolt into the bolt hole 422C of the lower cylinder 422.

The pusher 6 used in the compression molding apparatus of this embodiment has a pusher body 61 and a pusher body 61 as shown in FIGS. 2 (a) and 2 (b), for example.
A removable tip 62 at the lower end of the
It has the fastening bolt 63 which connects 1 and 62. At the center of the tip surface of the tip chip 62, a raised portion 62A whose peripheral surface gradually decreases in diameter toward the tip surface is provided. Therefore, the peripheral surface of the raised portion 62A is formed as a tapered surface 62B. The tip of the raised portion 62A is formed as a flat surface. Then, as shown in (a) of the figure, a circular recess 62C is formed in the center of this flat surface, and a through hole 62D through which the connecting bolt 63 penetrates is formed in the center of the bottom of the recess 62C. Has been done. An annular protrusion 62E surrounding the through hole 62D is formed at the center of the base end surface of the tip chip 62. On the other hand, a female screw 61A that is screwed with the connecting bolt 63 is formed on the tip surface of the pusher body 61,
An annular groove 61B that fits into the annular protrusion 62E of the tip 62 is formed around the female screw 61A.

The head portion of the connecting bolt 63 is shown in FIG.
As shown in FIG. 6, a hexagonal hole 63A (see (b) in the same figure) is formed in a flat columnar shape so as to fill the concave portion 62C of the tip chip 62, and a tightening tool fits in the center of the tip surface of the head. Has been formed. Further, a female screw (not shown) that is screwed into the hole filling bolt 64 is formed on the bottom surface of the hexagonal hole 63A. This hole filling bolt 64 is a connecting bolt 6
3 has a head of a similar system, and the hexagonal hole 63A of the connecting bolt 63 is filled with this head. A hexagonal hole 64A into which a tightening tool is fitted is formed at the center of the front end surface of the head.

Therefore, after the annular projection 62E of the tip 62 is fitted in the annular groove 61B of the pusher body 61, the connecting bolt 63 is mounted through the concave portion 62C of the tip 62 and is connected through the tightening tool. When the bolt 63 is tightened, the pusher body 61 and the tip tip 62 are integrated. The hexagonal hole 63A of the connecting bolt 63 can be filled with the hole filling bolt 64. Hole filling bolt 6
Since the hexagonal hole 64A of 4 is small, it is left as it is. When the tip 62 is consumed, the tip 62 can be replaced by removing the connecting bolt 63.

Thus, when the substance to be compressed is compressed using the compression molding apparatus of this embodiment, the ridge 62A is formed on the tip surface of the tip 62 of the pusher 6, so that the water content is reduced. Even if the substance to be compressed reaches about 40%, when the substance to be compressed is compressed by the protrusion 62A, the protrusion 6
At 2A, the substance to be compressed is compressed from the center and the water in the center is pushed to the periphery. Moisture that escaped to the surrounding area is raised 62
It escapes upward from the outer peripheral surface of the tip 62 through the slit of the pusher 6 and the inner sleeve 42 via the tapered surface 62B of A. As a result, the bulk density of the compression molded article becomes higher than ever. Further, at this time, a large frictional force acts between the compression molded body and the first tubular body 422A of the inner sleeve 42, but since the first tubular body 422A has excellent wear resistance and pressure resistance, The inner sleeve 42 is worn,
It is less likely to be damaged, and the material to be compressed can be repeatedly compression molded to obtain a compression molded product having a high bulk density.

By carrying out the operating method of the present invention using the above compression molding apparatus, a stable compression molding having a high bulk density can be obtained. The operating method of the present invention is characterized in that after the substance to be compressed in the inner sleeve 42 is compressed via the pusher 6, the pusher 6 is held in the compressed state for a predetermined time. That is, after a lapse of a predetermined holding time after compression, the pusher 6 is pulled up, the gate is opened, and the compression molded body is inserted into the inner sleeve 4
Discharge from 2. As the compression holding time, the time required until the material to be compressed is plastically deformed is preferable, but the time is naturally limited in view of work efficiency. Although this holding time differs depending on the material of the material to be compressed, for example, in the case of general steel cutting waste, the holding time is preferably 3 to 5 seconds.

When the relationship between the holding time, the pressing force and the bulk density of the compression molded product was tested, the results shown in FIGS. 3 (a) and 3 (b) were obtained. 3A shows the relationship between the pressing force and the bulk density when the holding time is 2 seconds, and FIG. 3B shows the relationship between the pressing force and the bulk density when the holding time is 4 seconds. There is.
In these graphs, ● indicates the first test result, and ■ indicates the second test result. FIG. 3 (a)
It was found that when the holding time shown in (2) is 2 seconds, there is a large variation in bulk density between the first time and the second time and it is not stable. It was found that when the holding time is 4 seconds shown in (b) of the figure, the variation of the bulk density is small and stable between the first and second times, and the bulk density becomes high. It was also found that when the pressing force exceeds 3.55 ton / cm ² , the bulk density does not change and is stable.

Further, the influence of the pusher having the tip of the present embodiment and the conventional pusher having a flat tip surface on the compression molding was tested, and FIGS. 4 (a) and 4 (b) were shown.
The results shown in are obtained. 4A shows the relationship between the pressing force and the bulk density when the holding time is 2 seconds, and FIG. 4B shows the relationship between the pressing force and the bulk density when the holding time is 4 seconds. There is. In these graphs, ● indicates the test results of the pusher of this embodiment, and ■ indicates the test results of the conventional pusher. From the results shown in FIGS. 4A and 4B, it was found that the pusher of the present embodiment can obtain a compression molded body having a higher bulk density than the conventional pusher.

5 (a) and 5 (b) are graphs showing the springback amount of the compression molded product when the compression molded product is discharged from the inner sleeve. 5A shows the relationship between the pressing force and the springback amount when the holding time is 2 seconds, and FIG. 5B shows the relationship between the pressing force and the springback amount when the holding time is 4 seconds. Shows. The springback amount means the amount of change in the height direction in which the compression molded body expands when the pusher 6 is pulled up from the compressed state. Further, ● indicates the result of the first test, and ■ indicates the result of the second test. It was found that when the holding time shown in FIGS. 5A and 5B is 4 seconds, the amount of springback is smaller than that when the holding time is 2 seconds, and a high bulk density can be obtained. Further, according to the result shown in (b) of the same figure, it was found that when the pressing force was 3.94 tons / cm ² or more, the springback amount hardly changed and was stable.

FIG. 6 is a graph showing the relationship between the pressure holding time and the bulk density by the pusher of this embodiment.
In addition, ● indicates a test result in which the charging time is 5 seconds. From the results shown in this figure, it was found that the longer the charging time, the higher the bulk density and the more stable. This is consistent with the results shown in FIGS.

As described above, according to this embodiment,
The inner sleeve 42 includes the first and second cylindrical bodies 422A, 4
22B, which is configured as a double-walled cylindrical body, and the first cylindrical body 422A is formed of a harder material than the second cylindrical body 422B, wear resistance and mechanical strength are increased, and the inner sleeve 42 The life can be extended. In addition, the first cylindrical body 422A of the inner sleeve 42
If it wears, the inner sleeve 42 can be regenerated by simply replacing this portion, and the maintenance cost can be further reduced.

Further, according to the present embodiment, the pusher 6
The diameter of the peripheral surface gradually decreases at the center of the tip surface of the taper surface 62B.
Since the bulging portion 62A that forms the ridge is provided, when compressing the substance to be compressed via the bulging portion 62A, liquid components such as water in the substance to be compressed can easily escape, and the bulk density of the compression molded body can be increased. Moreover, after compressing the substance to be compressed through the pusher 6, this state is held for at least 4 seconds to suppress the amount of springback of the compression molded body, and it is possible to stabilize the shape without breaking up with high bulk density. It is possible to obtain the compression molded product.

In the above embodiment, the inner sleeve 4 is used.
2 is composed of an upper cylinder 421 and a lower cylinder 422 that are vertically divided into two, and the lower cylinder 422 is further divided into the first and second cylindrical bodies 42.
Although the structure having the double-wall structure of 2A and 422B has been described, the lower cylinder 422 may have a multi-wall structure of a triple-wall structure or more as necessary. In addition, although the inner sleeve is divided into the upper and lower parts in the above-described embodiment, the inner sleeve may have a multi-wall structure including a double-wall structure including first and second cylinders. good. Further, the inner sleeve may be formed by forming the first cylinder, which comes into contact with the substance to be compressed, with a hard material that is more wear-resistant than other cylinders, and the individual materials may be appropriately selected as needed. You can Although only the main part of the compression molding device has been described in the above embodiment, it is preferable that the compression molding device is provided with a cutting oil recovery device or the like attached to the compressed substance other than the compressed part of the compressed substance. . Also,
In the above-described embodiment, the case where the material to be compressed W containing a large amount of coolant water is compression-molded has been described, but also in the case where the material to be compressed composed of powdered or granular material such as coffee, tea meal, bran, etc. is compression-molded. It goes without saying that the compression molding apparatus of the present invention can be used.

[0034]

According to the first, fourth and fifth aspects of the present invention, it is possible to provide a compression molding apparatus having high wear resistance and pressure resistance and excellent durability.

Further, according to the invention described in claims 2 to 6, a compression molding apparatus and a method of operating the compression molding apparatus which can obtain a stable compression molded article having a high bulk density and not falling apart are provided. can do.

[Brief description of drawings]

FIG. 1 is a view showing an inner sleeve of an embodiment of a compression molding apparatus of the present invention, (a) is a sectional view showing a state in which an upper cylinder and a lower cylinder are separated, and (b) is a view from above of (a). Plan view,
(C) is a plan view from below.

FIG. 2 is a view showing a tip end portion of a pusher of an embodiment of a compression molding apparatus of the present invention, in which (a) is a sectional view of a portion thereof,
(B) is a plan view from below.

FIG. 3 is a diagram showing the relationship between the pressing force of the pusher and the bulk density of the compression-molded product when the material to be compressed is compression-molded using the compression-molding apparatus equipped with the inner sleeve shown in FIG. 1 and the pusher shown in FIG. Here, (a) is a graph when the pressing force is held for 2 seconds, and (b) is a graph when the pressing force is held for 4 seconds.

4A and 4B are views showing the difference in compression molding action between the compression molding apparatus having the tip shown in FIG. 2 and the conventional compression molding apparatus having a flat tip, where FIG. And (b) are graphs when the pressing force is held for 4 seconds.

5 shows the relationship between the pressing force of the pusher and the amount of springback of the compression molded body when the material to be compressed is compression molded using the compression molding apparatus equipped with the inner sleeve shown in FIG. 1 and the pusher shown in FIG. In the figure, (a) is a graph when the pressing force is held for 2 seconds, and (b) is a graph when the pressing force is held for 4 seconds.

FIG. 6 shows the charging time, the pressing force holding time, and the bulk density of the compression-molded body when the material to be compressed is compression-molded using the compression-molding apparatus equipped with the inner sleeve shown in FIG. 1 and the pusher shown in FIG. It is a graph which shows a relationship.

FIG. 7 is a configuration diagram showing an example of a conventional compression molding apparatus.

[Explanation of symbols]

6 pusher (pressing body) 41 Outer sleeve (outer cylinder) 42 Inner sleeve (inner cylinder) 61 Pusher body 62 Tip 62A ridge 62B taper surface 421 upper cylinder 422 lower cylinder 422A First cylinder 422B Second cylinder

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shinsuke Kusano             2-1, Okawa-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa             Koki Shoji Co., Ltd.

Claims (6)

[Claims] 1. An outer cylinder having a supply means for supplying a substance to be compressed, a receiving port for receiving the substance to be compressed via the supplying means formed in a part of a peripheral surface, and a receiving port of the outer cylinder. A corresponding inlet is formed in a part of the peripheral surface and is fitted in the outer cylinder so as to be movable in the axial direction, an opening / closing body for opening and closing one end opening of these cylinders, and this opening / closing And a pressing body for compression-molding the substance to be compressed supplied into the inner cylinder closed via the body, and the inner cylinder is configured as a multi-wall cylinder having at least first and second cylinders. At the same time, the compression molding device is characterized in that the first cylindrical body that comes into contact with the substance to be compressed is formed of a material harder than the second cylindrical body. 2. An outer cylinder having a supply means for supplying a substance to be compressed, a receiving port for receiving the substance to be compressed via the supplying means formed in a part of a peripheral surface, and a receiving port of the outer cylinder. A corresponding inlet is formed in a part of the peripheral surface and is fitted in the outer cylinder so as to be movable in the axial direction, an opening / closing body for opening and closing one end opening of these cylinders, and this opening / closing A pressing body for compression-molding the substance to be compressed supplied into the inner cylinder closed through the body, and a ridge portion whose peripheral surface gradually reduces in diameter is provided at the center of the tip end surface of the pressing body. A compression molding device characterized by: 3. The inner cylinder is configured as a multi-wall cylinder having at least first and second cylinders, and the first cylinder contacting the substance to be compressed is harder than the second cylinder. The compression molding apparatus according to claim 2, wherein the compression molding apparatus is formed of a material. 4. The inner cylinder is divided into at least an upper cylinder and a lower cylinder and these are connected to each other, and the lower cylinder is configured as a multi-wall cylinder having at least first and second cylinders. The compression molding device according to claim 1 or 3, wherein the first cylindrical body that is in contact with the material to be compressed is formed of a material harder than the second cylindrical body. 5. The compression molding according to claim 1, wherein the first cylinder is configured to be attachable to and detachable from the second cylinder. apparatus. 6. An outer cylinder having a supply means for supplying a substance to be compressed, a receiving port for receiving the substance to be compressed via the supplying means formed in a part of a peripheral surface, and a receiving port of the outer cylinder. A corresponding inlet is formed in a part of the peripheral surface and is fitted in the outer cylinder so as to be movable in the axial direction, an opening / closing body for opening and closing one end opening of these cylinders, and this opening / closing A method of operating a compression molding apparatus comprising: a pressing body for compression-molding a substance to be compressed supplied into the inner cylinder closed via a body, wherein the substance to be compressed in the inner cylinder via the pressing body A method for operating a compression molding apparatus, comprising: pressing and compressing the pressing body, and holding the pressed body in a compressed state for a predetermined time.