JP2006255772A - Machine for compression-molding briquette for metallic material, apparatus for manufacturing briquette, and method for compression-molding briquette - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machine for compression-molding a briquette, which machine can manufacture the briquette by efficiently compression-molding a material for recycling of materials. <P>SOLUTION: The machine for compression-molding the briquette comprises a die apparatus 12 which has a forming chamber formed therein to compression-mold the material, and a plunger 15 provided so as to advance and recede in the axial direction to compression-mold the material supplied in the forming chamber. The die apparatus 12 comprises a pressure receiving member 16 which composes a pressure receiving surface 16a opposed to the tip end surface 15a of the plunger 15 and is fixed in the axial direction, an outside die 44 having a sliding surface inside so as to slide on the outside surface of the plunger 15, and a supporting means for supporting the outside die 44 such that the outside die 44 moves forward in the same direction by interlocking with the forward movement of the plunger 15 in the pushing direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a briquette compression molding machine, a manufacturing apparatus, and a compression molding method for a metal raw material, and more particularly to an apparatus for obtaining briquettes from a recyclable material including metal powder such as grinding chips.

  Chips and polishing sludge generated when grinding and polishing ferrous metals such as bearing steel and carburized steel are recovered as cotton-like (fibrous) aggregates containing abrasive fluids and abrasives containing moisture and oil. ing. Since this flocculent aggregate contains a large amount of pure iron, a technique for reusing it as a steelmaking raw material has been proposed from the viewpoint of environmental protection and resource saving. For example, as shown in Patent Document 1, a cotton-like aggregate is compression-molded to obtain a molded body. The molded body is impregnated with a solidifying auxiliary agent (curing liquid) and then dried, and then subjected to briquette. Is manufacturing. And the manufactured briquette is collect | recovered by the steel maker, is remelted, and is recycled.

  An apparatus known in the art for manufacturing such a briquette is, for example, as shown in Patent Document 2. This apparatus includes a screw for feeding the fed cotton-like aggregate into a lower mold (molding chamber), and a press machine for compression-molding the aggregate fed into the mold.

JP 2002-129248 A Registered Utility Model No. 3009829

  The die of the press machine described in Patent Document 2 is firmly fixed to the frame of the apparatus, and the flocculent aggregate that becomes the briquette material is compressed in the cavity of this die. The aggregate to be compressed spreads laterally in the cavity, which is a direction perpendicular to the pressing direction of the press, and the aggregate is strongly pressed against the inner peripheral surface of the mold. Therefore, the aggregate is compressed while generating a large frictional resistance (sliding force) with the inner peripheral surface of the mold. Therefore, the pressing force of the press machine has a problem that, in addition to the force that actually compresses the aggregate, a force that resists this frictional resistance is required, the efficiency is low, and a press machine with a large capacity is required. ing.

Moreover, although the cotton-like aggregate used as the briquette material contains a large amount of moisture, it needs to be sufficiently dried to obtain a recyclable briquette. This is because if a briquette with insufficient moisture removal is directly put into a steel maker's blast furnace, bumping (steam explosion) may occur due to the moisture.
A method of removing moisture by applying a large compressive load to a cotton-like aggregate that is a briquette material using a press as shown in Patent Document 2 is conceivable. However, even if this agglomerate is compressed by increasing the compression load, water does not escape from the mold, and it is difficult to remove sufficient water. Loss will occur. In the conventional apparatus, there is a limit in removing moisture even if the compression load is increased, and there is a problem that the capacity (capacity) of the press machine is unnecessarily increased.

  Therefore, the present invention has been made in view of the above problems, and a briquette compression molding machine that can efficiently produce a briquette by compression molding a material for recycling, a briquette manufacturing apparatus including the same, and It aims at providing the compression molding method of a briquette.

  In order to achieve the above object, the present invention provides a mold apparatus in which a molding chamber for compression molding a material for recycling including metal powder is formed, and the material supplied into the molding chamber. In the compression molding machine for briquettes for metal raw materials, the mold device is provided with a plunger that is coaxial with respect to the mold device for compression molding and is provided so as to be freely retractable in the axial direction. A pressure receiving member that is fixed in the axial direction that constitutes a pressure receiving surface that faces the distal end surface of the plunger, an outer mold that has a sliding contact surface that is in sliding contact with the outer peripheral surface of the plunger, and an extrusion of the plunger Supporting means for supporting the outer mold is provided so that the outer mold moves forward in the same direction in conjunction with the forward movement in the direction.

  According to such a configuration, since the outer mold is supported by the support means, when the material is compression-molded inside the mold apparatus by the plunger, the plunger is interlocked with the forward movement of the plunger in the extrusion direction. The outer mold can be moved forward in the same pressing direction. That is, the outer mold can move forward in the extrusion direction together with the material being compressed, and the frictional resistance generated between the outer peripheral surface of the material being compressed and the sliding contact surface (inner peripheral surface) of the outer mold is released. (Reducing). As a result, the pressing force generated on the plunger side can be prevented from being consumed as a force against the frictional resistance, and the required power (capacity) in the compression molding machine can be reduced. Furthermore, wear on the sliding contact surface of the mold apparatus can be reduced.

  And the compression molding method of the briquette by this compression molding machine is in a molding chamber constituted by a pressure receiving surface fixed in the axial direction facing the front end surface of the plunger and a sliding surface on which the outer peripheral surface of the plunger slides. It is a method in which a solidified molded body is obtained by filling a material for recycling including metal powder and compressing the material with the plunger moving toward the molding chamber. This is a method of moving the sliding surface forward in the pressing direction in conjunction with the forward movement of the jar in the pushing direction.

  In addition, the outer mold has a first mold disposed at a position penetrating the plunger at the time of the maximum stroke, and a position at which the molded body compressed by the plunger at the maximum stroke is filled therein. It is preferable that the second mold is divided and configured before and after the plunger is extruded. According to this configuration, in order to discharge the molded body from the inside of the second mold, for example, if the second mold is moved by a small stroke in a direction away from the first mold by an actuator for material discharge described later, molding is performed. The body can be removed from the second mold.

  In this way, when the outer mold is divided, the support means further forms a gap between the first mold and the second mold after the plunger penetrates the first mold. As described above, it is preferable to have a function of generating a difference in the movement amount of the plunger in the extrusion direction with respect to both the molds. In this case, a gap can be formed between both molds by causing a difference between the movement amount of the first mold and the movement amount of the second mold. Then, excess moisture in the material generated by the material being compressed can be discharged from the gap to the outside of the mold apparatus. Therefore, moisture contained in the material can be effectively removed.

  And, the compression molding method of briquettes by this compression molding machine is such that during the compression molding by the plunger, the sliding surface is divided back and forth on the rear side in the extrusion direction of the plunger from the filling portion of the molded body. This is a method for generating a gap for drainage.

Further, the support means having the function of generating a difference in the amount of movement with respect to the first mold and the second mold is specifically linked to the forward movement of the plunger in the pushing direction. A first support mechanism that supports the first mold so that the first mold moves forward in the same extrusion direction, and when the plunger does not penetrate the first mold, the second mold is the first mold. The second mold is supported so as to move forward in the pushing direction of the plunger, and when the plunger penetrates the first mold, the second mold is further further than the first mold. It can comprise from the 2nd support mechanism which supports the said 2nd type | mold so that it may move to the extrusion direction front side.
According to this configuration, the frictional resistance generated between the first mold and the second mold with the outer peripheral surface of the material to be compressed can be released (reduced), and the necessary power (capacity) in the compression molding machine. Can be reduced. When the plunger penetrates the first mold, the second mold can further move to form a gap between the first mold and the second mold. Excess moisture in the material can be discharged from the gap to the outside of the mold apparatus.

  Moreover, it is preferable that the second support mechanism includes a material discharge actuator that moves the second mold forward in the pushing direction of the plunger to expose the molded body. According to this configuration, the molded body can be easily taken out from the second mold.

  Further, the outer mold has a supporting member for supporting the molded body discharged from the second mold at two points from below at a lower vicinity of the opening end of the cavity formed in the second mold. It is preferable to have it. According to this configuration, since the molded body taken out from the second mold is supported at two points from below by the support member, it is possible to prevent the taken-out molded body from being tilted and being out of posture. Thereby, delivery of the molded object to the next process becomes easy. The mold has a support member, and the configuration is simplified.

  In addition, a briquette manufacturing apparatus for metal raw materials provided with the compression molding machine includes a hopper attached to a frame, and the compression molding machine described above for compression molding the material input from the hopper. It can comprise by providing the conveying machine with a drying function which conveys the compression-molded molded object while drying.

  According to the present invention, when a briquette is manufactured by compressing a material for recycling including metal powder with a mold apparatus and a plunger, the power required for compressing the material with the plunger is reduced. can do.

Embodiments of the present invention will be described below with reference to the drawings.
1 is a front view showing an outline of a briquette manufacturing apparatus for metal raw materials according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a sectional side view thereof.
Briquettes manufactured by this manufacturing apparatus are, for example, flocculent aggregates (recycles containing metal powder) generated by grinding chips generated when grinding ferrous metal members such as heat-hardened bearing steel and carburized steel. The material for resource recycling) is solidified.

In this manufacturing apparatus, a compression molding machine 2, a transport machine 3, a dryer 5, and the like are mounted on one (one) frame 6, and a cotton-like material introduced from a hopper 1 attached to the frame 6. The agglomerates (hereinafter also referred to as materials) are compression-molded in the compression molding machine 2, the compression-molded molded body W is conveyed to the dryer 5 side by the conveyor 3, and the molded body W is dried in the dryer 5. It is solidified to produce briquettes.
The hopper 1 is provided in the upper stage portion 8 of the frame 6, and the material charged from the inlet of the hopper 1 opened upward in the upper stage portion 8 is fed to the lower stage of the frame 6 by a screw (not shown) in the hopper 1. It is supplied to the mold apparatus 12 of the compression molding machine 2 in the section 7.

  The compression molding machine 2 compression-molds the material put in from the hopper 1 to obtain a short columnar shaped body W. The compression-molded molded body W is transported to the upper stage 8 side of the frame 6 by the transporter 3, and the molded body W is dried in the dryer 5 provided on the upper stage 8. The molded body W conveyed to the upper stage 8 by the conveyor 3 may be directly put into the drying furnace 30 of the dryer 5 and dried. However, as shown in FIG. The body W is impregnated with the solidification aid in the dipping machine 4 and then dried with the drier 5. The dipping machine 4 is provided between the compression molding machine 2 in the lower stage section 7 and the dryer 5 in the upper stage section 8. In FIG. 1, the dipping machine 4 is disposed on the upper stage section 8 side of the frame 6. It is provided in the vicinity of the entrance.

First, the overall configuration of the briquette manufacturing apparatus of the present invention will be described.
As shown in FIGS. 1 to 3, the frame 6 is assembled in a rectangular parallelepiped shape by, for example, a linear steel plate, and is wider in the width direction (left and right direction in FIG. 2) than the depth dimension (up and down direction in FIG. 2). It has a horizontally long shape with large dimensions.
The briquette manufacturing apparatus includes the dryer 5 so that the dryer 5 becomes the upper step 8 of the horizontally long rectangular parallelepiped frame 6 and the compression molding machine 2 becomes the lower step 7 of the frame 6. The compression molding machine 2 is arranged in two upper and lower stages and is mounted on one common frame 6. The transporter 3 connects the lower step portion 7 and the upper step portion 8 on the frame 6.

  The compression molding machine 2 will be briefly described. The compression molding machine 2 includes a press machine 9 and a mold apparatus 12 for obtaining a molded body W by compression molding a material. The press machine 9 can be constituted by a hydraulic cylinder having a pressing rod 10, for example. When the pressing rod 10 linearly moves forward toward the mold apparatus 12, the plunger 15 provided at the tip of the pressing rod 10 presses the material supplied into the mold apparatus 12, and this Compresses the material.

  The dryer 5 will be briefly described. The dryer 5 includes a drying furnace 30 for drying the molded body W molded by the compression molding machine 2 and impregnated with the solidification auxiliary agent with warm air (hot air), and a drying furnace. And a hot air generator 31 for supplying hot air to 30. The molded body W impregnated with the solidification auxiliary agent is put into the drying furnace 30 and dried while being conveyed by the conveyor 32 in the drying furnace 30. In this way, a dried briquette of good quality is obtained by passing the molded body W through the drying furnace 30.

And as shown in FIG. 1, the axial direction of the said press rod 10 for pressing a material is made into the direction of the longitudinal direction (width direction) of the flame | frame 6, and it is made to dry, conveying the molded object W The conveying direction of the drying furnace 30 is the longitudinal direction (width direction) of the frame 6 which is the same direction. That is, in the lower stage portion 7 of the frame 6, the press machine 9 and the mold device 12 are arranged side by side along the longitudinal direction of the frame 6, and the arrangement direction is the axis of the pressing rod 10 of the press machine 9. Direction (extrusion direction of the plunger 15). And the axial direction of this press rod 10 and the conveyance direction of the drying furnace 30 in the upper stage part 8 become parallel.
Thereby, since the press machine 9 which becomes long in the axial direction coincides with the longitudinal direction of the frame 6 and the drying furnace 30 which makes the conveying path long coincides with the longitudinal direction of the frame 6, the entire apparatus can be made compact.

Further, the mold apparatus 12 included in the compression molding machine 2 is provided on one side in the longitudinal direction of the frame 6 (left side of the lower step portion 7 in FIG. 1), and transports the molded body W in the drying furnace 30 of the dryer 5. The direction is a direction from one side in the longitudinal direction to the other side in the longitudinal direction (a direction from the left side of the upper step 8 to the right side in FIG. 1).
As a result, in FIG. 1, the molded body W compression-molded in the mold apparatus 12 on the left side of the lower stage portion 7 of the frame 6 is conveyed to the left side of the upper stage portion 8 by the conveyor 3, where the molded body W The solidification aid is impregnated into the upper portion 8 and dried in the drying furnace 30 of the upper stage portion 8 while transporting the molded body W from the left side portion toward the right side portion, thereby obtaining a briquette. Therefore, the moving distance of the molded body W from the mold apparatus 12 to the drying furnace 30 can be shortened, and the apparatus can be made compact.

As shown in FIG. 3, in the lower stage portion 7 of the frame 6, the press machine 9 and the mold apparatus 12 are in front of the horizontal direction (hereinafter referred to as the depth direction) perpendicular to the longitudinal direction of the frame 6 (FIG. 3). The hydraulic unit 9a for the press 9 made of a hydraulic cylinder is disposed on the back side (left side) in the depth direction. In addition, as shown in FIG. 2, in the upper portion 8 of the frame 6, the inlet of the hopper 1 and the hot air generator 31 included in the dryer 5 are arranged in the front portion in the depth direction, and the depth direction The dipping machine 4 and the drying furnace 30 included in the drying machine 5 are arranged on the back side of the machine. The conveyance machine 3 can convey the molded body W compression-molded at the front portion of the lower step portion 7 to the back side portion of the upper step portion 8 along a vertical plane at a short distance.
Further, the drying furnace 30 and the hot air generator 31 are formed into horizontally long rectangular parallelepiped shapes, and in order to make the entire apparatus compact and reduce the overall height, the upper stage portion 8 is arranged so that the longitudinal directions thereof are parallel to each other. It is arranged.
According to the briquette manufacturing apparatus having the above configuration, the entire apparatus can be made compact, and in the case where the compression molding machine and the dryer are disposed separately and planarly as in the prior art, these necessary installations are required. Whereas the area was about 9 m ² , the required installation area can be reduced to 3 m ² or less according to the apparatus of the present invention.

Next, each device mounted on the frame 6 of the manufacturing apparatus will be further described.
The compression molding machine 2 has a press machine 9 and a mold device 12, and the press machine 9 can be constituted by a hydraulic cylinder having a pressing rod 10, for example. As the pressing rod 10 linearly moves forward toward the mold apparatus 12, the plunger 15 at the tip of the pressing rod 10 compresses the material supplied into the molding chamber in the mold apparatus 12. That is, the plunger 15 is coaxial with the mold device 12 and is provided so as to be movable in and out in the axial direction.

  As shown in FIGS. 1 and 4, the mold apparatus 12 includes a pressure-receiving member 16 that forms a pressure-receiving surface 16 a that faces the tip surface 15 a of the plunger 15, and a sliding contact that slides on the outer peripheral surface of the plunger 15. And an outer mold 44 having a surface inside. The outer mold 44 includes a cylindrical first mold 13 and a cylindrical second mold 14 adjacent to the first mold 13 in the axial direction. The outer mold 44 is formed by pushing a plunger. It is a split mold divided in the front and rear direction (axial direction).

An opening 13 a that opens to the hopper 1 side is formed at the top of the first mold 13, and the material supplied from the hopper 1 side is accommodated in the first mold 13 and the second mold 14. The second mold 14 is provided on the same horizontal axis as the first mold 13 in the axial direction, and the second mold 14 has a space portion having the same cross-sectional shape as the space portion of the first mold 13. The pressure receiving member 16 is fixed to a fixing plate 23 a of the gantry 22 fixed to the frame 6.
And the plunger 15 is formed in the front-end | tip part of the press rod 10 which the press machine 9 has as shown in FIG. 1, and the plunger 15 first inserts into the 1st type | mold 13, and presses the said material. Move (drive) in the axial direction. The pressure receiving member 16 can be formed in a rod shape, and the rod portion is inserted into the second mold 14, and the material is compressed between the plunger 15 moving in the axial direction.
And as shown in FIG.4 (c), in the outer side metal mold | die 44, the 1st type | mold 13 is arrange | positioned in the position where the plunger 15 penetrates the said plunger 15 at the time of a maximum stroke, The 2nd type | mold 14 is arrange | positioned in the position with which the molded object W compressed by the said plunger 15 is filled inside when the plunger 15 is the maximum stroke.
The space formed by the pressure receiving surface 16 of the pressure receiving member 16 and the sliding surface on which the outer peripheral surface of the plunger 15 is slidably contacted is a molding chamber for compression molding the material, and the molding chamber has a circular cross section. ing.

The mounting structure of the outer mold 44 will be described. The mold apparatus 12 includes support means for supporting the outer mold 44, and this support means is interlocked with the forward movement of the plunger 15 in the pushing direction. The outer mold 44 is supported so that the outer mold 44 moves forward in the same direction. Note that the amount of movement (fine movement) of the outer mold 44 is sufficiently smaller than the amount of movement of the plunger 15 forward. In addition, the support means supports the first support mechanism 21 that supports the first mold 13 that is one side of the outer mold 44 that is divided, and the second mold 14 that is the other side. The second support mechanism 17 is configured.
Further, in this supporting means, a gap g is formed between the first mold 13 and the second mold 14 after the plunger 15 shown in FIG. 4C has penetrated the first mold in the compression molding process. As described above, it has a function of generating a difference in the movement amount with respect to both the molds 13 and 14.

  Specifically, in FIG. 1, a frame 22 for the compression molding machine 2 is fixed to the lower stage portion 7 of the frame 6. The gantry 22 is provided between the vertical fixing plates 23a and 23b erected on the mold device 12 side and the main body side (cylinder side) of the frame 6 and a pair of these fixing plates 23a and 23b. It has four guide shafts 24 provided horizontally. As shown in FIG. 1, four horizontal auxiliary rods 33 may be provided between the pair of fixing plates 23a and 23b. The guide shaft 24 may also function as the auxiliary rod 33.

The first mold 13 of the mold apparatus 12 is attached to the mount 22 via a support member as the first support mechanism 21 (hereinafter, the first support mechanism is referred to as the support member 21). The first mold 13 can move in the same direction in conjunction with the forward movement of the first mold 13 in the extrusion direction. That is, as shown in FIG. 5, the vertical plate-like support members 21 are respectively fixed to both sides of the outer peripheral surface of the first mold 13, and the mounting holes 21 a formed in the upper and lower portions of the support member 21 are respectively attached. The support member 21 is fixed to the guide shaft 24 with the guide shaft 24 being inserted. Thereby, the first mold 13 is attached to the gantry 22.
In addition, a slit 21b that is continuous with the mounting hole 21a is formed in the support member 21, and the guide shaft 24 in the mounting hole 21a of the support member 21 is adjusted by tightening and adjusting the width of the slit 21b with a bolt (not shown). It is possible to adjust the tightening fixing force.

  According to the mounting structure of the first mold 13, the first resistance is generated by the frictional resistance (friction force) generated between the outer peripheral surface of the material compressed by the plunger 15 and the inner peripheral surface of the first mold 13. Although the axial load acts on the mold 13, the first mold 13 is attached to the four guide shafts 24 via the vertical plate-shaped support members 21, so that the support member 21 is elastic by the axial load. Since it can be deformed, the first mold 13 can be displaced (moved) toward the second mold 14. Thereby, the frictional resistance can be reduced.

As shown in FIG. 4, the mounting structure of the second mold 14 is supported by the fixing plate 23a of the gantry 22 via the second support mechanism 17, and the second mold 14 is a plan. The jar 15 is supported by the second support mechanism 17 so as to move in the same direction in conjunction with the forward movement of the jar 15.
The second support mechanism 17 connects a plurality of (four) horizontal shaft members 25 having one end portion fixed to the second mold 14 and the other end portion of the shaft member 25 to connect these shaft members 25. And a vertical connecting plate 26. The shaft member 25 penetrates the fixed plate 23a, and the shaft member 25 is slidable in the axial direction. Thereby, the 2nd type | mold 14 becomes movable to an axial direction.
When the plunger 15 does not penetrate the first mold 13 as shown in FIG. 4B, the second support mechanism 17 has the second mold 14 together with the first mold 13. The second mold 14 is supported so as to move forward in the extrusion direction. Further, as shown in FIG. 4C, the second support mechanism 17 is configured such that when the plunger 15 penetrates through the first mold 13, the second mold 14 is further further than the first mold 13. The second mold 14 is supported so as to move forward in the extrusion direction.

  Further, the second support mechanism 17 includes a horizontal expansion / contraction actuator 18 between the fixed plate 23 a of the gantry 22 and the connection plate 26 of the support mechanism 17. The actuator 18 can be a hydraulic cylinder, and an axial load that is separated from the first mold 13 is applied to the second mold 14 by a frictional force between the material and the outer peripheral surface of the material. At this time, the gap between the fixing plate 23a and the connecting plate 26 can be prevented from opening. In other words, the actuator 18 functions as a load unit that loads the second die 14 that is about to move in the axial direction away from the first die 13 with a resistance force that is opposite to the direction in which the second die 14 moves in the axial direction. ing.

The operation in which the gap g is formed between the first mold 13 and the second mold 14 by the movement of the second mold 14 in the axial direction is that the pressing machine 9 applies a pressing force to the material as shown below. Thus, this is automatically performed by the frictional force between the material to be compressed and the second mold 14.
That is, as shown in FIG. 4A, a material for recycling including metal powder is filled in the molding chamber of the mold apparatus 12, and the plunger 15 moves toward the molding chamber by the operation of the press machine 9. As shown in FIG. 4B, the pressing force from the plunger 15 side to the pressure receiving member 16 side acts on the material, and the material is compressed. The material to be compressed spreads laterally in the cavity c, which is a direction perpendicular to the pressing direction of the press 9 (by the plunger 15), and the material is strongly pressed against the inner peripheral surface of the second die 14. As a result, the material is compressed while generating frictional resistance between the inner peripheral surface of the first mold 13 and the inner peripheral surface of the second mold 14. At this time, the second support mechanism 17 supports the second mold 14 to be movable so as not to restrain the movement of the first mold 13 supported by the support member 21 due to this frictional resistance.

Then, the material generates frictional resistance between the inner peripheral surface of the first mold 13 and the inner peripheral surface of the second mold 14, and reaches the inside of the cavity c of the second mold 14 as shown in FIG. It will be compressed. The second mold 14 moves against the resistance force of the actuator 18 in the axial direction away from the first mold 13 by the frictional force with the outer peripheral surface of the compression body made of the material to be compressed. . That is, when a pressing force is applied to the material to increase the frictional force generated between the material and the second mold 14, and the frictional force is greater than the resistance force by the actuator 18, the second mold 14 moves. .
In other words, the compression molding method performed by the compression molding machine 2 is a mold apparatus on the rear side in the extrusion direction of the plunger 15 from the filling portion of the molded body W during the compression molding by the plunger 15 in FIG. 12 (sliding surface thereof) is divided into front and rear to generate a gap g for drainage.

  Furthermore, the timing and amount of movement of the second mold 14 can be adjusted by adjusting the magnitude of the resistance force by the actuator 18, and the gap g between the first mold 13 and the second mold 14 can be adjusted. The formation time and the amount of gaps can be controlled.

According to the mounting structure of the second mold 14 as described above, in the cavity c of the second mold 14, when the frictional force between the material pressed by the plunger 15 and compressed and the second mold 14 increases. The second mold 14 can move so as to release (eliminate) the frictional force, and a gap g is automatically formed between the first mold 13 and the second mold 14. And since the 2nd type | mold 14 moves so that the said frictional force may be released, abrasion of the internal peripheral surface of the 2nd type | mold 14 can be reduced.
And the excess water contained in the material is squeezed out by compressing the material, and a gap g is formed between the first mold 13 and the second mold 14 during the compression. Therefore, excess water that has been squeezed and subjected to pressure is expelled to the outside of the mold apparatus 12 through the gap g.

  According to the mold apparatus 12 of the compression molding machine 2 provided in the manufacturing apparatus of the present invention, the mold apparatus 12 is a split mold made up of the first mold 13 and the second mold 14 and is used for compression molding of material. At this time, a gap g is formed between them. As a result, the resistance of water squeezed from the compressed material to the outside of the mold apparatus 12 is reduced, and the water can easily escape from the gap g, so that the water removal is effectively performed. The moisture content of a briquette completed by a conventional press without using this mold apparatus 12 was limited to about 10%, but by using this mold apparatus 12, the moisture content was dried to 3% or less. It can be a briquette. Even if this briquette manufactured in accordance with the present invention is put into a blast furnace of a steel manufacturer as it is, the briquette is sufficiently dry, so that the occurrence of bumping (steam explosion) can be prevented.

  Further, since the first mold 13 and the second mold 14 are movable in the axial direction when the material is compression-molded, the outer peripheral surface of the material to be compressed, the first mold 13 and the second mold 14. The frictional resistance generated between the inner peripheral surface and the inner peripheral surface can be released by this movement. Thereby, it can suppress that the pressing force by the press machine 9 is consumed as a force resisting the frictional resistance, and the power in the press machine 9 can be reduced. In the conventional apparatus in which the mold is fixed to the frame, the capacity of the press machine is about 80 tons, but according to the apparatus of the present invention, it can be reduced to 60 tons.

  The actuator 18 included in the second support mechanism 17 will be further described. The actuator 18 can function as a material discharge unit for taking out the molded body W compression-molded in the mold apparatus 12 from the cavity c. That is, as shown in FIG. 4C, after the material is compression-molded, the second mold 14 moves small in the direction away from the first mold 13, and after the compression molding is finished, the molded body W is obtained. As shown in FIG. 2, the actuator 18 is extended to move the second die 14 further in the axial direction (the front side in the pushing direction of the plunger 15) further away from the first die 13 so that the second die 14 is compressed. Further, the molded body W is exposed to a position closer to the fixing plate 23a. The pressure receiving member 16 inserted in the second mold 14 is fixed to the fixed plate 23a, and the molded body W compression-molded in the cavity c of the second mold 14 by the extension operation of the actuator 18 is as follows. The pressure receiving member 16 is pushed out of the cavity c.

As shown in FIGS. 6 and 7, the second mold 14 has a support member 19 that supports the molded body W discharged from the second mold 14 at two points from below. The support member 19 is provided in the lower vicinity of the opening end 20 of the cavity c formed inside the second mold 14 between the mating surfaces of the first mold 13 and the second mold 14.
The support member 19 can be composed of two horizontal pins, and these two parallel pins are fixed so as to protrude from the vertical alignment surface of the second mold 14 in the horizontal direction. Are formed with holes (not shown) for receiving these pins in a state where the mating surfaces are in contact with each other.

According to such a configuration, the molded body W is pushed out from the cavity c of the second mold 14 at the same time as the second mold 14 is retreated greatly so as to be separated from the first mold 13, and the pin is automatically inserted into the cavity c. Since it is disposed directly under the opening end 20, the extruded molded body W is supported by two pins. And the molded object W supported by the pin is moved to the tray 27 by the side of the conveying machine 3 shown in FIG. 8 with the chuck | zipper apparatus which is not shown in figure.
In addition, since the lower part of the molded body W having a short cylindrical shape is supported at two points by two pins, the core position of the removed molded body W is always constant. Accordingly, the molded body W can be easily taken out by the chuck device.

As shown in FIG. 8, the transporter 3 transports the molded body W molded by the compression molding machine 2 to the upper stage 8 side, and moves the tray 27 that receives the molded body W and the tray 27. A transport mechanism. The transport mechanism includes a conveyor 34 and driving means 35 for driving the conveyor 34.
The conveyor 34 can be, for example, a chain type conveyor. In this case, the driving means 35 can be a motor and a sprocket for driving the chain, although not shown. The conveyor 34 may be a belt type in addition to the chain type.

  The trays 27 for receiving the molded bodies W are attached to a conveyor 34, and three are provided side by side in the transport direction as shown in FIG. The tray 27 is configured as a container that opens to one side, and the molded body W can be received from the opening. The bottom of the tray 27 is attached to the conveyor 34.

  The conveyor 34 has a first transport path 36 whose transport direction is the height direction and a second transport path 37 whose transport direction is the horizontal direction. The first transport path 36 is slightly inclined with respect to the vertical plane, but is straight in the height direction. The tray 27 receives the molded body W molded in the lower step portion 7 and transports it to the upper step portion 8. Part. And the 2nd conveyance path 37 is a straight straight part which continues from the upper end part of the 1st conveyance path 36, and in order to make it correspond to dipping machine 4 and dryer 5 of upper stage 8 which are the next processes. It is a part of.

  The conveying path of the tray 27 by the conveyor 34 is such that the molded body passing portion 38 of the upper stage portion 8 that makes the tray 27 correspond to the dipping machine 4 and the dryer 5 side, and the lower step portion 7 that makes the tray 27 correspond to the compression molding machine 2 side. The molded body receiving portion 39 and a foreign matter removing portion 40 located further below the molded body receiving portion 39 are provided. The driving means 35 reciprocates the tray 27 between the upper molded body transfer section 38 and the lower foreign matter removing section 40 with the molded body receiving section 39 interposed therebetween.

The movement of the tray 27 will be described in detail. When the tray 27 is positioned on the molded body receiving portion 39 on the first conveyance path 36 and the tray 27 receives the molded body W, the conveyor 34 is moved by the driving means 35 to form the molding. The tray 27 holding the body W is moved to the molded body transfer section 38 on the second transport path 37 and stopped. Here, the molded body W is pulled up by the transport chuck 28 (see FIG. 9) provided in the dipping machine 4, and the tray 27 is emptied. Then, the driving means 35 reverses and moves the conveyor 34 in the opposite direction to move the empty tray 27 downward. The tray 27 passes through the molded body receiving portion 39 and moves to the foreign matter removing portion 40 which is the lower end portion of the first transport path 36. The tray 27 in the foreign matter removing unit 40 is in a posture that opens downward, and foreign matters remaining in the tray 27 can be automatically dropped. The dropped foreign matter is collected by a foreign matter collection unit (not shown) provided at a position below the foreign matter removal unit 40. Then, when the three trays 27 are sequentially opened downward, the driving means 35 reverses again and moves the conveyor 34 in the opposite direction to move the tray 27 to the molded body receiving portion 39.
Since the tray 27 reciprocates between the foreign matter removing unit 40 and the molded product passing unit 38, the passing area of the tray 27 can be only on one side of the conveyor 34. Therefore, the occupied space of the entire conveyor 3 can be reduced, Compactness is possible.

In the molded body receiving portion 39, the operation of delivering the molded body W to the three trays 27 is performed one by one with respect to each tray 27. When the molded body W is placed on the three trays 27, driving is performed. The means 35 is activated. In addition, the tray 27 is open toward a chuck device (not shown) that moves the molded body W from the compression molding machine 2 side to the transport machine 3 side, so that the molded body W can be easily received.
Further, when the molded product W is picked up from the three trays 27 by the transport chuck 28 (see FIG. 9) provided in the immersion machine 4 in the molded product transfer section 38, the driving means 35 is activated when the three trays 27 become empty. Operate. Since the three trays 27 are arranged at equal intervals in the horizontal direction and the openings of the trays 27 face upward in the molded body transfer unit 38, they are placed on the tray 27 by the transport chuck 28 above the trays 27. The formed body W can be picked up easily.

  As shown in FIG. 9, the molded body W picked up from the tray 27 by the conveying chuck 28 of the dipping machine 4 descends into a liquid tank 29 in which a liquid containing a solidification auxiliary (hereinafter referred to as a curing liquid) is placed. Is done. The conveyance chuck 28 immerses the molded body W in the curable liquid and impregnates the solidification aid. By impregnating the compact W with the solidification aid, solidification having a desired strength can be achieved. In addition, since the grinding chips to which the oil component which is a briquette material adheres are hard to mutually adhere, it is difficult to solidify to desired intensity | strength only by compression-molding material. Therefore, when a briquette formed only by compression molding without impregnating the solidification auxiliary agent is put into the blast furnace, the briquette may come apart and fly up while being scattered, and most of it may be recovered by the dust collector. However, this can be prevented by impregnating the solidification aid. As the curable liquid, an aqueous solution containing at least one selected from colloidal silica, sodium silicate, and aluminum phosphate is preferably used.

The conveyance chuck 28 included in the dipping machine 4 will be described. The conveyance chuck 28 has a pair of claw members 41 that hold and lift the molded body W from both sides, and the conveyance chuck 28 sets the molded body W in the horizontal direction. It can be moved in the vertical direction.
The dipping machine 4 has a control means (not shown) composed of a microcomputer or the like, and the transport chuck 28 is configured to operate by this control means. The conveyance chuck 28 grips and removes the molded body W from the tray 27 of the conveyor 3 by the claw member 41, and horizontally moves the molded body W to a position above the liquid tank 29. Then, the molded body W is vertically lowered into the liquid tank 29 while being gripped by the claw member 41 and is immersed in the curable liquid for a predetermined time, so that the cured liquid is soaked into the surface portion of the molded body W. Thereafter, the conveying chuck 28 raises the molded body W in the vertical direction to the upper position of the liquid tank 29, stops the molded body W for a predetermined time in the aerial portion that is the upper position, and drains excess hardening liquid from the molded body W.
Thereafter, the conveyance chuck 28 moves the molded body W impregnated with the solidification auxiliary agent in the horizontal direction to the drying furnace 30 side of the dryer 5 while being held by the claw member 41.

  A draining table 42 is provided at a position before the charging port 30a of the drying furnace 30 for placing the formed body W before it is loaded into the drying furnace 30, and the horizontal movement by the transport chuck 28 is as follows. This is performed until the molded body W is placed on the draining table 42. The draining table 42 is provided so that the height of the lower end of the molded body W and the upper surface of the draining table 42 are substantially the same during the horizontal movement. As a result, the molded body W moves horizontally so that the lower end of the molded body W slides on the upper surface of the draining table 42, and the curable liquid remaining at the lower end of the molded body W can be attached to the draining table 42 side. The remaining curable liquid is surely drained.

  In this way, the dipping machine 4 first removes the hardening liquid dripping from the molded body W at a position above the liquid tank 29 in order to remove the excess solidification auxiliary from the molded body W impregnated with the solidification auxiliary. Drain the water. Then, the dripping curable liquid is returned to the liquid tank 29 as it is. Next, the curing liquid remaining at the lower end of the molded body W can be removed by bringing the lower end of the molded body W into contact with the draining table 42. By the two draining operations, it is possible to prevent excess curing liquid from entering the drying furnace 30, and it is possible to prevent the conveyor 32 in the drying furnace 30 from being hardened by the solidification aid.

As shown in FIG. 9, the claw member 41 of the conveyance chuck 28 that horizontally moves the molded body W to the draining table 42 is used to dry the molded body W previously placed on the draining table 42 by the back surface 41 a. Can be pushed to the inside. Of the pair of claw members 41, the former molded body W pushed by the back surface 41 a of the one claw member 41 on the drying furnace 30 side is placed on the conveyor 32 of the drying furnace 30, and the former molding is performed. The body W is automatically carried into the drying furnace 30.
The former molded body W on the draining table 42 is in a stationary state for a predetermined time until the subsequent molded body W is conveyed to the draining table 42.

As shown in FIG. 2, the dryer 5 includes a drying furnace 30, a hot air generator 31 that supplies hot air (hot air) into the drying furnace 30, and a conveyor 32 that passes through the drying furnace 30. Have. The conveyor 32 can be a chain conveyor, for example, and a conveyance path using a mesh belt is configured.
The hot air supply port (not shown) of the hot air generator 31 is connected to the downstream end of the horizontally long drying furnace 30 in the conveying direction of the molded body W, and the hot air is downstream in the conveying direction of the drying furnace 30. It is comprised so that it may become the flow which goes to one direction from the side to an upstream. That is, in the drying furnace 30, the conveying direction of the molded body W and the direction in which the warm air passes are opposite to each other.

Moreover, as shown in FIG. 10, the molded body W that is placed and conveyed on the conveyor 32 is placed with its outer peripheral surface in contact with the placement surface of the mesh belt. . As a result, the molded body W is in line contact with the mounting surface, the contact portion (contact area) between the mounting surface and the lower end of the molded body W is reduced, and hot air for drying the molded body W is molded. The entire body W can be efficiently contacted. Therefore, drying in a short time is possible and the production efficiency is improved.
Further, the number of the molded bodies W that can be accommodated in the drying furnace 30 can be increased by placing the molded bodies W on the conveyor 32 with one portion of the outer peripheral surface of the molded body W facing downward. It becomes.

  The conveyor 32 conveys the plurality of molded bodies W in a line in the conveying direction (longitudinal direction) of the drying furnace 30. However, there is a gap between them. Further, in the drying furnace 30, this row is dried as a plurality of rows (three rows in FIG. 10) in a direction orthogonal to the transport direction. Thereby, the quantity of the molded object W in the drying furnace 30 can be increased, and productivity can be improved. In FIG. 10, only the 1-by-3 molded body W is shown for ease of explanation.

In addition, as shown in FIG. 11, a blocking member 43 that generates a turbulent flow by partially blocking the hot air flowing from the downstream side is formed in the drying furnace 30. 10 and 11, the arrow A is the conveyance direction of the molded body W, and the arrow B is the direction in which the warm air passes.
The blocking member 43 has a plate-like shape with a leading end extending from the inner wall surface (upper wall surface, lower wall surface, both side wall surfaces) of the drying furnace 30 toward the upstream side of the hot air (downstream in the conveyance direction of the molded body W). The member is inclined with respect to the vertical plane. Thereby, the warm air supplied into the drying furnace 30 can pass through the drying furnace 30 while being in a turbulent flow, and the warm air can be brought into contact with the molded body W from various directions. Efficiency can be improved.
And the molded object W which was conveyed by the conveyor 32 and passed the drying furnace 30 is automatically discharged | emitted from the discharge port 30b (refer FIG. 1) of the drying furnace 30, and is collect | recovered by the collection device (not shown). .

  According to the above-described briquette manufacturing apparatus of the present invention, briquettes that are automatically solidified in about one hour after the material is charged from the hopper 1 can be obtained from the discharge port 30b of the drying furnace 30. The briquettes obtained by this apparatus have sufficient strength to enable truck transportation and lifting magnet transportation. Furthermore, it is possible to obtain a good dry briquette that can be directly put into a blast furnace of a steel manufacturer.

  The briquette manufacturing apparatus of the present invention is not limited to the illustrated form, and may be of other forms within the scope of the present invention. The actuator 18 of the compression molding machine 2 is an electric motor type other than the pressing cylinder. As an alternative, the pressing rod 10 may be moved in the axial direction by an electric motor. Further, in the transporter 3, the number of trays 27 may be other than three, for example, two or four or more.

It is a front view which shows the outline of the manufacturing apparatus of the briquette of this invention. It is a top view of FIG. It is a cross-sectional side view of FIG. It is explanatory drawing of the metal mold apparatus part which a compression molding machine has. It is explanatory drawing of the 1st type | mold which a metal mold apparatus has. It is explanatory drawing of the metal mold apparatus part explaining the taking-out of a molded object. It is explanatory drawing of the supporting member which supports the taken-out molded object. It is a side view explaining a conveyance machine. It is explanatory drawing explaining an immersion machine. It is a perspective view explaining the molded object in the drying furnace of a dryer. It is sectional drawing of a drying furnace.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hopper 2 Compression molding machine 3 Conveyor 4 Dipping machine 5 Dryer 12 Mold apparatus 13 1st type 14 2nd type 15 Plunger 15a Tip surface 16 Pressure receiving member 16a Pressure receiving surface 17 2nd support mechanism 18 Actuator 19 Support member 20 Open end 21 First support mechanism 44 Outer mold c Cavity g Gap

Claims (9)

A mold apparatus in which a molding chamber for compressing a material for recycling including metal powder is formed, and the mold apparatus for compressing the material supplied into the molding chamber In a briquette compression molding machine for a metal raw material having a coaxial center and a plunger provided so as to be freely retractable in its axial direction,
The mold apparatus includes: a pressure receiving member fixed in an axial direction that constitutes a pressure receiving surface facing a tip surface of the plunger; and an outer mold having a sliding contact surface in sliding contact with an outer peripheral surface of the plunger. And a supporting means for supporting the outer mold so that the outer mold moves forward in the same direction in conjunction with the forward movement of the plunger in the pushing direction. Briquette compression molding machine.   The outer mold is disposed at a position where the molded body compressed by the plunger at the time of the maximum stroke and the first mold disposed at a position penetrated by the plunger at the time of the maximum stroke is filled therein. The briquette compression molding machine for metal raw material according to claim 1, wherein the second mold is divided into a front and rear direction of the plunger in the extrusion direction.   The support means moves in the pushing direction of the plunger relative to both molds so that a gap is formed between the first mold and the second mold after the plunger penetrates the first mold. The briquette compression molding machine for metal raw materials according to claim 2, which has a function of generating a difference in quantity. The support means includes a first support mechanism that supports the first mold so that the first mold moves forward in the extrusion direction in conjunction with movement of the plunger forward in the extrusion direction;
When the plunger does not penetrate through the first mold, the second mold is supported together with the first mold so as to move forward in the pushing direction of the plunger, and the plunger A second support mechanism for supporting the second mold so that the second mold moves further forward in the pushing direction of the plunger than the first mold when penetrating the first mold; The briquette compression molding machine for metal raw materials according to claim 3.   5. The briquette for a metal raw material according to claim 4, wherein the second support mechanism includes a material discharge actuator that moves the second mold forward in the pushing direction of the plunger to expose the formed body. Compression molding machine.   The outer mold has a supporting member that supports the molded body discharged from the second mold at two points from below in the vicinity of the lower part of the opening end of the cavity formed inside the second mold. The briquette compression molding machine for metal raw materials according to any one of claims 2 to 5.   A hopper attached to a frame, and the compression molding machine according to any one of claims 1 to 6 for compressing and molding the material charged from the hopper, while drying the compression molded article An apparatus for producing briquettes for metal raw materials, comprising a transporter having a drying function for transporting. A material for recycling including metal powder is filled in a molding chamber composed of a pressure receiving surface fixed in the axial direction facing the tip end surface of the plunger and a sliding surface on which the outer peripheral surface of the plunger slides. In the compression molding method of briquettes for metal raw materials, in which the material is compressed by the plunger that moves toward the molding chamber to obtain a solidified molded body,
A briquette compression molding method for a metal raw material, wherein the sliding surface is moved forward in the pressing direction in conjunction with the forward movement of the plunger in the pushing direction. A material for recycling including metal powder is filled in a molding chamber composed of a pressure receiving surface fixed in the axial direction facing the tip end surface of the plunger and a sliding surface on which the outer peripheral surface of the plunger slides. In the compression molding method of briquettes for metal raw materials, in which the material is compressed by the plunger that moves toward the molding chamber to obtain a solidified molded body,
During the compression molding by the plunger, a metal raw material is characterized in that a gap for drainage is generated by dividing the sliding surface back and forth on the rear side in the extrusion direction of the plunger from the filling portion of the molded body. Briquette compression molding method.

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