JP2011056732A - Blending filling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blending filling method which fills homogeneous blending in uniform density even if a mold to be filled has a special shape. <P>SOLUTION: In the blending filling method in which blending is put in a charger 14 having a cylindrical casing 15 and a stirring means (rotary arm 17 and stirring rod 18) rotating around the central axis of the casing 15, the charger 14 is moved horizontally toward a mold, and the blending in the casing 15 is dropped into the space 27 of the mold at a first stop position where the rotary shaft 16 of the casing 15 does not cover the space 27, the charger 14 is stopped to turn the blending in the casing 15 dropped into the space 27 of the mold. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method of filling a mold for molding a refractory brick or the like with a compound.

  The manufacturing process of refractory bricks includes a weighing process for weighing refractory and binder, a kneading process for kneading the weighed refractory and binder to obtain a blend, and a molding process for filling and compressing the blend into a mold to obtain a compact. , A drying step for drying the molded body, a firing step for firing the dried molded body to obtain a fired body, and a processing step for cutting the fired body (Non-patent Document 1).

  A molding machine used in the molding process includes a charger that reciprocates between a standby position and a filling position to fill a mold with a compound (Patent Document 1). Also, the blending is supplied from the kneading process and charged into the charger when the charger is in the standby position. The charger that has received the blending moves to the filling position, fills the mold with the blending, and returns to the standby position when the filling is completed. Thereafter, the compound filled in the mold is pressed into a molded body, and the molded body is taken out from the mold and sent to the drying process, and then sent to the firing process.

  Patent Document 2 proposes that a stirring blade is provided inside the charger. Patent Document 3 proposes a charger including a rod that rotates around a rotation axis, and a stirring blade that includes a stirring bar that hangs down from the rod and extends in the direction of the rotation axis. In any case, since the blending is agitated to homogenize the blending in the charger, the uniform blending can be filled in the mold.

Japanese Patent Laid-Open No. 07-80821 JP 2000-317718 A JP 2006-289658 A JP 09-052167 A

Tsuneo Kayama et al. “Recent Refractory Manufacturing Technology” (Nippon Steel Technical Report No. 388, P29)

  Now, the shape of the molded body molded by the molding machine is not only a simple one like a rectangular parallelepiped. For example, a mold for molding a refractory brick with an inner hole used for a slide gate (Patent Document 4) includes a core bar for molding the inner hole. Since the vicinity of the core rod of the mold has a large frictional resistance, there is a problem that even if a charger with a stirring blade as disclosed in Patent Documents 2 and 3 is used, the composition cannot be sufficiently filled in the vicinity of the core rod. there were. That is, there is a problem that the filling density of the blend cannot be made uniform.

  The present invention has been made under such a background, and an object thereof is to provide a blending and filling method capable of filling a uniform blend with a uniform density even with a specially shaped mold.

  According to the blending and filling method of the present invention, a charger having a cylindrical casing and a stirring means rotating around the central axis of the casing is reciprocated between a standby position and a filling position, and the inside of the casing is filled at the filling position. In the compounding and filling method of dropping the compound into the mold space, when the charger is advanced from the standby position toward the filling position and the casing and the space are looked down from directly above, the center of the casing is obtained. Stopping the charger at a first stop position where the shaft is located closer to the standby position than the planar shape of the space portion, and dropping the mixture in the casing into the space portion at the first stop position; It is characterized by.

  The first stop position is a plane shape of the space portion in a range of a semicircle near the filling position, out of a planar shape of the casing having a circular shape when the casing and the space portion are viewed from directly above. It may be a position where the entire range falls.

  The mold includes a liner that is in the space portion and moves up and down relatively with respect to the mold, and the composition in the casing is dropped into the space portion at the first stop position. The liner may be lowered relative to the mold.

  After lowering the liner relative to the mold, the charger is moved from the first stop position to a second stop position where the central axis of the casing overlaps the center of the planar shape of the space portion. You may make it move forward and stop the said charger there.

  Retreating the charger from the second stop position toward the standby position, and stopping the charger at a predetermined position where a part of the planar shape of the casing overlaps a part of the planar shape of the space; Thereafter, the liner may be raised relative to the mold by a predetermined height, and then the charger may be returned to the standby position.

  The stirring means includes rotating arms extending radially from the central axis of the casing and orthogonal to each other, and the stirring means is reduced to 1 / during dropping of the mixture in the casing into the space of the mold. You may make it reversely rotate every 4 rotations alternately.

  According to the present invention, even a specially shaped mold such as a mold for a refractory brick with an inner hole can be filled with a uniform blend with an equal density, so that a highly accurate molded body can be obtained. can get. Therefore, the cutting amount in the machining process can be reduced. Moreover, the quality of a refractory brick can be improved.

It is a notional block diagram of the molding machine which shows embodiment of this invention. It is a top view of a lower mold. It is a perspective view which shows the shape of a refractory brick. It is a top view which shows the shape of a charger. It is a conceptual side view of the molding machine of the stage which mix | blends a mixing | blending to a charger. It is a conceptual side view of the molding machine in the 1st step of compounding filling. It is a conceptual side view of the molding machine in the 2nd step of compounding filling. It is a top view which shows the relative position of the lower mold | type and a charger in the 2nd step of compounding filling. It is a conceptual side view of the molding machine in the 3rd stage of compounding filling. It is a conceptual side view of the molding machine in the 1st step of extraction of a compounding. It is a conceptual side view of the molding machine in the 2nd step of extraction of a mixing | blending. It is a conceptual side view of the molding machine in the stage which starts a press. It is a conceptual side view of the molding machine in the stage where press was completed.

  Hereinafter, an example of an embodiment of the present invention will be specifically described.

  FIG. 1 is a conceptual configuration diagram of a molding machine 1 for molding a refractory brick having a shape as described later (see FIG. 3). In addition, FIG. 1 is a conceptual diagram, and in order to prevent the figure from becoming complicated, elements unnecessary for the description of the blending and filling method are omitted from the constituent elements of the molding machine 1.

  As shown in FIG. 1, the molding machine 1 includes a base 2, a lower mold holding frame 3, a lower mold 4, and an upper mold 5.

  The lower mold holding frame 3 holds the lower mold 4 and is driven by lifting means (not shown) to move up and down relatively with respect to the base 2. In this specification, “elevating” refers to movement in the direction indicated by arrow V in FIG. 1, and “horizontal movement” refers to movement in the direction indicated by arrow H.

  The lower mold 4 includes an outer frame 7, an outer frame liner 8, a lower mold liner 9, a dowel liner 10, and a core rod 11. The outer frame 7 is a frame that constitutes the outline of the lower mold 4 and is directly fixed to the lower mold holding frame 3. The outer frame liner 8 is a mold attached to the inner side of the outer frame 7. The lower die liner 9 is in the outer frame liner 8 and is driven by an elevating cylinder 12 fixed to the base 2. The dowel liner 10 is fixed to the base 2. The core rod 11 is fixed to the outer frame 7 and moves up and down together with the outer frame 7.

  The upper mold 5 is disposed above the lower mold 4, is driven by a hydraulic device (not shown), and is pressed against the lower mold 4. An upper mold liner 6 is attached to the lower surface of the upper mold 5.

  With this configuration, when the lower mold holding frame 3 moves up and down, the outer frame 7 and the outer frame liner 8 move up and down relatively with respect to the lower mold liner 9 and the dowel liner 10. Further, when the elevating cylinder 12 is driven, the lower mold liner 9 moves up and down relatively with respect to the outer frame 7, the outer frame liner 8, the dowel liner 10 and the core rod 11. The plan view of the lower mold 4 as viewed from the A direction is as shown in FIG.

  The refractory brick 20 molded by the molding machine 1 is a refractory brick with an inner hole having a through hole 21 as shown in FIG. 3 and is used for a slide gate or the like. The core rod 11 of the lower mold 4 described above is a mold for forming the through hole 21. Further, the periphery of the through hole 21 is raised from the upper surface 22 to form a dowel 23, and the top surface 24 of the dowel 23 is formed by the dowel liner 10 of the lower mold 4. Further, the upper surface 22 is formed by the lower mold liner 9 and the side surface 25 is formed by the outer frame liner 8. For convenience of explanation, FIG. 3 shows a state in which the refractory brick 20 is turned upside down. That is, when the refractory brick 20 is in the molding machine 1, the dowel 23 is positioned below the refractory brick 20.

  Returning to FIG. 1 again, the description of the configuration of the molding machine 1 will be continued. A charger table 13 is attached to the side of the lower mold holding frame 3. The upper surface of the charger table 13 is flush with the upper surface of the lower mold holding frame 3, and the charger 14 is placed thereon. The charger 14 is driven by a driving means (not shown), and is a device that reciprocates between a standby position (position shown in FIG. 1) and directly above the lower mold 4 (filling position) and fills the lower mold 4 with the compound, The blending is introduced from a hopper (not shown) at the standby position. In the present specification, the movement of the charger 14 from the standby position toward the filling position is referred to as “forward”, and the movement of the charger 14 from the filling position toward the standby position is referred to as “reverse”.

  The charger 14 includes a cylindrical casing 15 that is open at the top and bottom, a rotating arm 17 that is rotated inside a casing 15 and is rotated by a rotating machine (not shown) and rotates about a rotating shaft 16. A stirring bar 18 hangs down. The rotary arm 17 and the stirring rod 18 function as a stirring blade that stirs the mixture held in the charger 14 and makes the composition uniform. As shown in FIG. 4, when the charger 14 is viewed from the B direction, the four rotating arms 17 are arranged radially at a 90 ° pitch around the rotating shaft 16 to form a cross shape. In addition, the diameter of the casing 15 of this embodiment is about 850 mm.

  In addition, a level sensor 19 is provided above the charger 14 to detect the blending height in the charger 14.

  Next, a procedure for operating the molding machine 1 and molding the refractory brick 20 will be described. Needless to say, the molding machine 1 is controlled by a control device (not shown) and automatically executes the procedure described below.

[Blending into chargers]
First, as shown in FIG. 5, the mixture is charged into a charger 14 placed at a standby position from a hopper (not shown). Further, while the composition is being charged into the charger 14, the rotating arm 17 rotates at a speed of 20 RPM, and the composition charged into the charger 14 is agitated to make its composition uniform. When the level sensor 19 detects that the blending height in the charger 14 has reached a predetermined level, the blending is stopped.

  When the blending is stopped, the rotating arm 17 is further rotated once and then stopped. This is because the blending in the charger 14 is finally leveled. Further, at this time, any two of the four rotating arms 17 are at positions that make ± 45 ° with respect to the moving direction of the charger 14 (the direction from the standby position toward the filling position). Is stopped (see FIG. 4). The lower mold holding frame 3 is lowered to the lowest position while the mixture is being charged into the charger 14. Further, the lower mold liner 9 is also lowered to the lowest position (the lifting cylinder 12 is also lowered).

[Formulation filling 1]
When the mixture is charged into the charger 14, as shown in FIG. 6, the lower mold holding frame 3 is raised by a predetermined height (= starting material charging start height, 20 mm to 30 mm in this embodiment), and the outer frame A space 27 is formed between the liner 8 and the lower mold liner 9.

  At the same time, the lifting cylinder 12 is driven to raise the lower mold liner 9 and lower the dowel liner 10 with respect to the lower mold liner 9. For this reason, the volume of the part corresponding to the dowels 23 in the space portion 27 is increased, and as a result, the blending charged in the dowels 23 is increased.

[Formulation filling 2]
When the lower mold holding frame 3 rises to the raw material filling start height, the charger 14 is moved horizontally to the position shown in FIG. 7 (first stop position) and stopped there to mix the mixture inside the charger 14 with the space portion 27. Drop inside. That is, the mixture is filled in the space portion 27. In addition, while filling the space part 27, the rotary arm 17 is alternately rotated by 90 °. In other words, if the rotating arm 17 is rotated 1/4 of the clockwise direction, then the counterclockwise 1/4 rotation is performed, and then the clockwise rotation is performed 1/4 rotation. to continue.

  FIG. 8 is a plan view showing the relative position of the lower mold 4 and the charger 14 at this time (the state shown in FIG. 7, that is, when the charger 14 is in the first stop position). In other words, the rotation axis 16 of the rotary arm 17 of the charger 14 is in front of the plane of the space 27 (close to the standby position), and the plane of the space 27 is the front half of the casing 15 (filling position). It is in the semicircle range. The reason why the charger 14 is stopped at such a position is to prevent the rotating shaft 16 from being directly above the planar shape of the space 27. This is because, in the vicinity of the rotation shaft 16, the amount of blending that is moved by the rotation of the rotary arm 17 is small. It is because it cannot be filled.

  Further, while the charger 14 is stopped at the position (first stop position) shown in FIGS. 7 and 8, the lower mold holding frame 3 is slowly raised. Therefore, since the lower mold liner 9 is lowered relative to the outer frame liner 8, the volume of the space 27 is slowly increased with the rise of the lower mold holding frame 3, and the composition corresponding to the expansion falls from the charger 14. Thus, the space 27 is filled. Also at this time, the stirring bar 18 rotates to assist the filling of the blend.

[Formulation filling 3]
Next, as shown in FIG. 9, the charger 14 is moved horizontally (advanced) at a low speed until the rotating shaft 16 of the rotating arm 17 comes directly above the center of the space portion 27 (second stop position). Stop and continue filling.

[Partial sampling 1]
When the charger 14 is stopped for a predetermined time at the position shown in FIG. 9 (second stop position), the charger 14 is moved backward by a predetermined distance toward the standby position at a low speed and stopped at the position shown in FIG. That is, the charger 14 is stopped at a predetermined position where a part of the charger 14 overlaps with a part of the space portion 27 in the vertical direction. And the raising / lowering cylinder 12 is driven, the lower mold | type liner 9 is raised only predetermined height, and a part of mixing | blending with which the space part 27 was filled is made to protrude on the upper surface of the outer frame 7. FIG.

[Partial sampling 2]
Thereafter, as shown in FIG. 11, when the charger 14 is returned to the standby position at a low speed, a part of the mixture protruding from the upper surface of the outer frame 7 is scraped off by the charger 14. That is, a part of the composition filled in the space 27 is extracted.

  As described above, the molding machine 1 fills the space portion 27 with the charger 14 moving forward (moving to the left in the figure), but when the charger 14 moves forward, It is pulled back later by the frictional resistance received from the mold 4. Therefore, the region in front of the space portion 27 (the region on the left side of the core rod 11) is less likely to be filled with the composition than the region in the rear (the region on the right side of the core rod 11). In other words, if an attempt is made to sufficiently fill the front area, the rear area will be overfilled. Therefore, the filling density of the blend becomes uneven before and after the core rod 11. Therefore, a part of the formulation filled in the rear side of the core rod 11 is removed so that the density of the formulation filled in the space 27 is uniform before and after the core rod 11.

  Needless to say, the distance to return the charger 14 toward the standby position in order to extract a part of the blend (the difference between the position of the charger 14 shown in FIG. 9 and the position shown in FIG. 10), and FIG. The projecting height from the upper surface of the outer frame 7 having a composition as shown is determined experimentally and empirically so that the density of the composition filled in the space 27 is uniform before and after the core rod 11.

[Molding]
When the filling of the blending is completed, as shown in FIG. 12, the lower mold holding frame 3 is raised, then the upper mold 5 is lowered, and the upper mold liner 6 is pressed against the lower mold 4. And as shown in FIG. 13, the lower mold | type holding | maintenance frame 3 and the lower mold | type liner 9 descend | fall to an initial position, the upper mold | type liner 6 descend | falls to a predetermined position, and a mixing | blending is shape | molded.

  As described above, according to the present invention, even a specially shaped mold such as a mold for a refractory brick with an inner hole can be filled with a uniform composition at a uniform density.

  In the above-described embodiment, the process of operating the molding machine 1 to fill the lower mold 4 with the compound and molding the refractory brick 20 has been specifically described. However, the present invention is implemented only in the molding machine 1. It is not something. The present invention can be applied to any molding machine provided with a charger that reciprocates between the standby position and the filling position regardless of the type or scale. Moreover, the structure of the lower mold | type 4 is an illustration, Comprising: This invention is applicable regardless of a structure, a dimension, and a shape of a metal mold | die. Further, the present invention is not only applied to the molding of a refractory brick with an inner hole such as the refractory brick 20, but can be widely applied to the molding of various types of bricks including a brick without an inner hole. it can. It can also be applied to molding of molded products other than bricks.

  Needless to say, the present invention can be freely modified, applied or improved within the scope of the technical idea described in the claims.

  INDUSTRIAL APPLICABILITY The present invention is useful as a method for filling a mold with a compound in a molding process such as brick.

1 molding machine 2 base 3 lower mold holding frame 4 lower mold 5 upper mold 6 upper mold liner 7 outer frame 8 outer frame liner 9 lower mold liner 10 dowel liner 11 core rod 12 lifting cylinder 13 charger table 14 charger 15 casing 16 rotating shaft 17 Rotating Arm 18 Stirring Bar 19 Level Sensor 20 Refractory Brick 21 Through Hole 22 Upper Surface 23 Dowel 24 Top Surface 25 Side Surface
26 mixes 27 spaces

Claims (6)

A charger having a cylindrical casing and a stirring means rotating around the central axis of the casing is reciprocated between a standby position and a filling position, and the mixture in the casing is dropped into the mold space at the filling position. In the blending and filling method,
Advancing the charger from the standby position toward the filling position;
When the casing and the space are looked down from directly above, the charger is stopped at a first stop position where the central axis of the casing is located closer to the standby position than the planar shape of the space. The composition filling method, wherein the composition in the casing is dropped into the space at a stop position of 1. The first stop position is a plane shape of the space portion in a range of a semicircle near the filling position, out of a planar shape of the casing having a circular shape when the casing and the space portion are viewed from directly above. The compounding and filling method according to claim 1, wherein the entire range is included. The mold is in the space, and includes a liner that moves up and down relative to the mold;
The liner is lowered relative to the mold while dropping the blend in the casing into the space at the first stop position. Formulation filling method. After lowering the liner relative to the mold,
The charger is advanced from the first stop position to a second stop position where a central axis of the casing overlaps a center of a planar shape of the space portion, and the charger is stopped there. 4. The method for filling with filling according to 3. Retreating the charger from the second stop position toward the standby position, and stopping the charger at a predetermined position where a part of the planar shape of the casing overlaps a part of the planar shape of the space;
Thereafter, the liner is raised relative to the mold by a predetermined height,
Furthermore, after that, the said charger is returned to the said stand-by position. The compounding filling method of Claim 4 characterized by the above-mentioned. The stirring means includes a rotating arm extending radially from the central axis of the casing and orthogonal to each other,
The said stirring means is alternately reversely rotated every 1/4 rotation while dropping the mixing | blending in the said casing in the said space part of the said metal mold | die, The any one of Claim 1 thru | or 5 characterized by the above-mentioned. The blending and filling method described in 1.

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