JP2011194349A - Automatic crusher for solidified object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive automatic crusher for solidified objects which stably maintains its crushing capability through a long time use and which performs efficient sieving by vibration of a sieving net without requiring a vibration exciter.SOLUTION: The automatic crusher for solidified objects includes: a charging chute 2 for charging solidified objects; an inclined plate 5 which is elastically supported so as to be vibratable and which makes the solidified objects slide down that are charged in the charging chute 2; a vertically movable motor-driven pressure roller 7 which crushes by pressurizing by gravity from above the solidified objects sliding on the inclined plate 5; the sieving net 12 which is installed in the downstream position of the inclined plate 5 and which sieves the solidified objects passed through the pressure roller 7 into powders and uncrushed solidified objects; a return duct 16 which sends by pressure the uncrushed solidified objects left on the sieving net 12 to the upstream position of the pressure roller 7 by means of blowing force of a blower 17; and a powder discharging chute 13 which discharges the powders passed through the sieving net 12.

Description

  The present invention relates to a solidified product automatic pulverizing apparatus for pulverizing a solidified product obtained by solidifying a granular material and recovering the granular material.

  Conventionally, in a foundry, a casting sand lump produced by dismantling a mold after casting is pulverized, and the foundry sand is recovered and reused. Non-Patent Document 1 discloses a foundry sand recovery apparatus used for this. This technology is characterized by a structure in which a large number of round steel bars are installed between annular frame members at a small interval to form a cylindrical tromel, and this is installed in the drum at a distance from its inner surface. . According to this technique, when the drum is rotated and the casting sand lump is put into the tromel, the casting sand lump is caught in the round steel and lifted in the rotating direction, and then falls by its own weight and pulverized, and the pulverized The casting sand is discharged from the gap between the round steel bars to the inner surface of the drum, and the contaminants are caught in the round steel and remain in the tromel so that they can be separated.

  By the way, the technique described in Non-Patent Document 1 is a method of pulverizing by repeated impact caused by dropping, but a hard cast sand lump (hereinafter referred to as “gala / dama”) is not easily pulverized by impact caused by dropping, and is not sufficiently crushed. The dama cannot pass through the gap between the round steel bars and remains in the tromel, and is not reused as foundry sand but is treated as industrial waste along with contaminants.

  For this problem, Patent Document 1 proposes a foundry sand recovery device that can forcibly grind even hard foundry sand lump. In this technology, a pair of elastic rollers are pivotally supported at a predetermined interval, and the shaft of one elastic roller is attached to a frame via a compression spring so that the interval between the elastic rollers can be expanded more than a predetermined interval. It is characterized by a structure in which a sieving screen is inclined downward. According to this technology, when the elastic roller is driven and the glass drum is inserted between the elastic rollers, the glass drum is buried in the surface of the elastic roller or spread between the elastic rollers to pass through, and the elasticity at the time of passing It is said that the dust and lumps are crushed by the repulsive force of the roller and compression spring, and then the foundry sand and contaminants can be separated with a sieve mesh.

However, the technique described in Patent Document 1 has the following problems.
1) When used for a long time, the urging force of the compression spring gradually decreases due to deterioration over time, and the elastic rollers are expanded with a slight force, so that galley and dust pass through with insufficient crushing. Recovery may be reduced.
2) Since the sieving screen does not vibrate, it is difficult to efficiently perform sieving unless a vibration is attached and vibration is actively applied.
3) Two elastic rollers that can be driven are required, and manufacturing costs are high.

“Cooler Crusher Kiyota Casting Machine Co., Ltd.” [online], Kiyota Casting Machine Co., Ltd., “March 19, 2010 search”, Internet <URL: http://www.kiyotacyuki.ecnet.jp/cooler.html >

Japanese Patent Laid-Open No. 10-202360

  The problem to be solved by the present invention is that these conventional problems are solved, the pulverization ability can be stably maintained even when used for a long period of time, and the sieving mesh vibrates without requiring a vibrator. It is an object of the present invention to provide a low-cost solidified automatic pulverizing apparatus that can efficiently screen.

The configuration of the present invention that solves this problem is as follows.
1) A solidified material automatic pulverizing device for crushing solidified material that has been solidified and recovering the powdered material. The solidified material is charged into a charging chute, and the charging chute is supported to vibrate. An inclined plate that slides down the solidified material that has been thrown in, a vertically movable pressing roller that presses and crushes the solidified material sliding down on the inclined plate with its own weight from above, and a driving means that drives the pressing roller; A sieving mesh provided in the downstream position of the inclined plate and sieving the solidified material that has passed through the pressing roller into a granular material and an unground crushed material, and the unground crushed solidified material remaining in the sieving screen Solidified product automatic pulverizer 2) Input chute characterized by comprising a return duct that is pumped to the upstream position by the blower's blowing power and a powder discharge chute that discharges the powder that has passed through the sieving mesh. Solidified material that can be crushed A pre-sieving screen for sieving into a non-grindable solidified product is provided at an upstream position of the inclined plate, and a non-grindable material discharge chute for discharging the non-grindable solidified material remaining in the pre-sieving screen is provided, 1) The solidified product automatic pulverizing apparatus 3) according to 1) or 2), wherein a specific gravity separation unit is provided in the middle of the return duct to separate the uncrushed solidified product by specific gravity and discharge the solidified product having a large specific gravity. Solidified product automatic grinding device 4) The solidified product automatic grinding device according to any one of 1) to 3), wherein the solidified product is a cast sand lump disassembled from a mold after casting.

The present invention has the following effects.
1) Since the solidified product is pulverized by the weight of the pressure roller, there is no portion that tends to deteriorate over time, such as a compression spring used in the prior art, and a stable pulverizing ability can be maintained even when used for a long time.
2) When the solidified material passes between the pressing roller and the inclined plate, the pressing roller moves up and down according to its thickness and the inclined plate vibrates, and the vibration propagates to the sieving mesh to efficiently screen. Is called. Therefore, it is not necessary to attach a vibrator.
3) Since only one pressing roller is required, the manufacturing cost can be reduced as compared with the prior art.

It is a side view of the solidified material automatic crusher of an Example. It is a top view of the solidified material automatic grinding | pulverization apparatus of an Example. It is a longitudinal cross-sectional view of the solidified material automatic crusher of an Example. It is explanatory drawing which shows the use condition of the solidified material automatic grinding | pulverization apparatus of an Example.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be specifically described based on examples and drawings.

  1 is a side view of the solidified material automatic pulverizing apparatus of the embodiment, FIG. 2 is a plan view of the solidified material automatic pulverizing apparatus of the embodiment, FIG. 3 is a longitudinal sectional view of the solidified material automatic pulverizing apparatus of the embodiment, and FIG. It is explanatory drawing which shows the use condition of the solidified material automatic crushing apparatus of an example.

  In the figure, 1 is a pedestal, 2 is a loading chute, 3 is a preliminary sieving net, 4 is a crushing unsuitable material discharging chute, 5 is an inclined plate, 5a is a discharge port, 6 is a spring, 7 is a pressing roller, and 7a is a roller shaft. , 8 is an arm, 8a is a stopper, 9 is a support shaft, 10 is a motor (driving means), 10a is an output shaft, 11 is a drive chain, 12 is a sieving screen, 13 is a granular material discharge chute, and 14 is a medium particle Inappropriate sieving screen, 15 is a return chute, 16 is a return duct, 17 is a blower, 18 is a specific gravity separation part, 19 is a heavy material discharge chute, A is gala dama (solidified material), a is foundry sand ( (Powder body) and B are contaminants.

  As shown in FIGS. 1 to 3, the solidified material automatic pulverizing apparatus of this embodiment is provided with a loading chute 2 attached to the upper portion of the gantry 1, and an inclined plate 5 is elastically supported by a spring 6 below the charging chute 2. A 1.5-mesh preliminary sieving net 3 is attached to the starting end of the inclined plate 5, and a crushing inappropriate material discharge chute 4 is attached to the side of the preliminary sieving net 3. The outer surface of the gantry 1 may be sealed with a silencer mat so that the sound can be insulated.

  A pressing roller 7 is arranged in the middle of the inclined plate 5, the pressing roller 7 is pivotally supported on the tip of the arm 8, and the base end of the arm 8 is pivotally supported on the gantry 1 so as to be movable up and down by the supporting shaft 9. Yes. The stopper 8a is for restricting the vertical movement of the pressing roller 7 within a certain range. A motor 10 having a speed reducer is attached to the rear portion of the gantry 1, and a drive chain 11 is suspended between the output shaft 10 a of the motor 10 and the roller shaft 7 a of the pressing roller 7. The inclined plate 5 may be moved up and down and up and down, and the gap with the pressing roller 7 may be adjusted.

  An 8-mesh sieving mesh 12 is continuously attached along the slope in the middle of the inclined plate 5, and a granular material discharge chute 13 is attached below the sieving mesh 12. Downstream of the inclined plate 5, a 3-mesh unsuitable sieving screen 14 is attached continuously along the slope, and a return chute 15 is attached below the unsuitable sieving screen 14. . The end of the inclined plate 5 is opened to form a discharge port 5a.

  A blower 17 is attached to the upper part of the gantry 1, and a return duct 16 is connected between the blower 17 and the side surface of the charging chute 2, bypassing the lower side of the inclined plate 5, and the return duct 16 and the return chute are connected. 15 terminations are connected. The end portion of the return duct 16 is connected so as to go around the charging chute 2. In the middle of the return duct 16, a specific gravity separation portion 18 is formed by widening, and a heavy material discharge chute 19 is attached to a side surface of the specific gravity separation portion 18.

  Hereinafter, pulverization and separation of Gala Dama A using the solidified product automatic pulverizing apparatus of the present embodiment will be described. As shown in FIG. 4, when the motor 10 is operated, the pressing roller 7 rotates clockwise at the lowest position. When the blower 17 is operated, the sucked air is pumped to the return duct 16 to form a vortex in the charging chute 2, and a negative pressure is generated in the return chute 15.

  When the gall and lumps A are charged into the charging chute 2, they drop onto the preliminary sieving mesh 3, and the large grains (particle diameter significantly exceeding the maximum distance between the inclined plate 5 and the pressing roller 7) left on the preliminary sieving mesh 3. Gara / dama A and contaminants B are discharged as unsuitable for pulverization by the unsuitable pulverization discharge chute 4, and gala / dama A that has passed through the preliminary sieving screen 3 falls to the starting end of the inclined plate 5.

  The gala dama A that has fallen on the inclined plate 5 slides under its own weight and is sandwiched under the pressing roller 7 and is sent out while being crushed by the compression, rotation and friction caused by the pressing roller 7's own weight. The pressure roller 7 moves up and down during the passage of the glass drum A, and the inclined plate 5 vibrates. The downward movement of the pressure roller 7 due to the vibration (striking action) promotes the grinding of the glass drum A. The vibration propagates to the preliminary sieving mesh 3 and the sieving mesh 12 so that sieving is performed efficiently. In addition, since the upward movement of the pressing roller 7 is restricted to a certain level by the stopper 8a, the particle size is less than the maximum distance between the inclined plate 5 and the pressing roller 7 even if the galley / dama A is considerably hard. Forced to be crushed.

  The foundry sand a crushed by the pressing roller 7 further slides down on the inclined plate 5 and is sieved by the sieving screen 12. The foundry sand a that has passed through the sieving mesh 12 is discharged to the outside by the powder discharge chute 13 and collected, and the insufficiently crushed gala dama A left on the sieving mesh 12 slides down to the end of the inclined plate 5. Further, the sieving is further performed by a sieving screen 14 that is not suitable for pulverizing medium grains. The regrindable galaxies A that have passed through the medium-grinding unsuitable sieving screen 14 fall on the return chute 15 and are sucked into the return duct 16 by negative pressure, and onto the medium-grinding unsuitable sieving screen 14. The remaining insufficiently crushed glass waste A is discharged from the discharge port 5a of the inclined plate 5 as inappropriate for pulverization.

  The gala dama A sucked into the return duct 16 is pumped to the specific gravity separation unit 18 by the blower 17. In the specific gravity separation unit 18, the gala / dama A having a low specific gravity is pushed up by the blower 17 and returned to the charging chute 2, and the contaminant B having a high specific gravity is discharged by the heavy material discharge chute 19 without being pushed up. Gala / dama A returned to the charging chute 2 falls again to the preliminary sieving mesh 3, and the above steps are repeated and pulverized and separated, and the foundry sand a is recovered. In this way, Gala-Dama A, which cannot be pulverized by the foundry sand collecting device of the prior art and is treated as waste, is separated into foundry sand a and waste, and the amount of waste can be reduced. .

  The technology of the present invention is mainly used for recovering reusable foundry sand by crushing a foundry lump disassembled from a mold after casting, but in addition, solid waste of industrial waste, burning husk, glass scrap, It can also be applied to the pulverization and pulverization and separation of concrete scraps, brick scraps, ceramic scraps, slag, debris, etc., grinding stones, shells, natural rocks, etc., and the production of foodstuffs and livestock feeds.

DESCRIPTION OF SYMBOLS 1 Stand 2 Input chute 3 Preliminary sieving mesh 4 Unsuitable crushing material discharge chute 5 Inclined plate 5a Discharge port 6 Spring 7 Press roller 7a Roller shaft 8 Arm 8a Stopper 9 Support shaft 10 Motor (drive means)
DESCRIPTION OF SYMBOLS 10a Output shaft 11 Drive chain 12 Sieving mesh 13 Powder granule discharge chute 14 Medium grain unsuitable material sifting mesh 15 Return chute 16 Return duct 17 Blower 18 Specific gravity separation part 19 Heavy material discharge chute A )
a Foundry sand (powder)
B Contaminant

Claims (4)

  This is a solidified material automatic crushing device for crushing the solidified material that has been solidified and recovering the powdered particle. It is charged into the charging chute and charged into the charging chute. An inclined plate that slides down the solidified material, a vertically movable pressing roller that presses and crushes the solidified material sliding down on the inclined plate with its own weight from above, a driving means that drives the pressing roller, and an inclined plate A sieving mesh that screens the solidified material that has passed through the pressure roller and passed through the pressure roller into a granular material and an unground crushed material, and the unground crushed solidified material remaining in the sieving mesh is positioned upstream of the pressure roller. A solidified product automatic pulverizing apparatus comprising a return duct that is pumped by a blower's blowing power and a powder discharge chute that discharges the powder that has passed through the sieving screen.   A preliminary sieving screen is provided upstream of the inclined plate to screen the solidified material put into the charging chute into a pulverized solidified material and a non-pulverizable solidified material, and the non-pulverized solidified material left in the preliminary sieving screen. The solidified product automatic pulverizing apparatus according to claim 1, further comprising a crushed unsuitable material discharge chute for discharging the slag.   The solidified product automatic pulverizing apparatus according to claim 1, wherein a specific gravity separation unit is provided in the middle of the return duct for separating the specific gravity of uncrushed solidified material and discharging the solidified material having a large specific gravity.   The solidified product automatic pulverizing apparatus according to any one of claims 1 to 3, wherein the solidified product is a cast sand lump disassembled from a mold after casting.

Images