JP3649400B2 - Pre-regeneration processing method and equipment for self-hardening foundry sand - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a self-hardening foundry sand pretreatment method and its equipment, and more specifically, a method of treating recovered sand before reclaiming and recycling the self-hardening mold after pouring and collecting and regenerating. Regarding the equipment.
[0002]
[Prior art and issues]
Conventionally, most of the self-hardening foundry sand glass produced when the mold made of self-hardening foundry sand is poured after pouring has been discarded. Therefore, in recent years, there is a movement to collect and recycle the self-hardening foundry sand glass to recycle waste, and to recycle it as line sand or core sand. At present, there has not yet been developed a product that is suitable and sufficient for reprocessing.
[0003]
The present invention has been made in view of the above circumstances, and its purpose is to recycle recovered sand containing self-hardening cast sand glass and a method and equipment for processing it in a suitable state before regenerating it. Is to provide.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the self-hardening foundry sand pretreatment method according to claim 1 treats the recovered sand before reclaiming treatment when the self-hardening mold after pouring is separated and recovered and regenerated. A method of pulverizing the recovered sand containing self-hardening foundry sand to form a small lump of the self-hardening foundry sand, removing iron pieces from the crushed recovered sand, The step of separating the recovered recovered sand into self-hardening foundry sand and massive self-hardening foundry sand, the step of further grinding the separated massive self-hardening foundry sand into a single-particle self-hardening foundry sand, and the grinding And a step of feeding the self-curing foundry sand and the single-particle self-curing foundry sand into a regenerator.
[0005]
In addition, in this invention, it is good to grind | pulverize the lump self-hardening foundry sand glass into the single-particle self-hardening foundry sand with a plurality of ceramic spherical bodies vibrating in a vibrating crushing tank.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of self-hardening foundry sand pretreatment facilities to which the present invention is applied will be described in detail below with reference to the drawings. As shown in FIG. 1, the present facility includes a primary pulverizer 1 that pulverizes the recovered sand containing self-hardening foundry sand to make the self-hardening foundry sand into a small lump, and the pulverized recovered sand. Sieving device 2 as a separating device for separating the self-hardening foundry sand and massive self-hardening foundry sand, magnetic separator 6 as an iron piece removing device for removing iron pieces from the crushed recovered sand, and separated massive self-hardening casting A secondary pulverizing apparatus 3 for further pulverizing the sand glass to form a single-particle self-hardening foundry sand, and a belt conveyor as a conveying device for feeding the pulverized self-hardening foundry sand and the single-particle self-hardening foundry sand into a regenerator 4.
[0007]
The primary pulverization apparatus 1 is connected to the sieving apparatus 2 via a bucket conveyor 5 and the magnetic separator 6. The primary pulverizer 1 is a general-purpose pulverizer having a bottom portion having a slit having a width of 4 mm. Further, as shown in FIGS. 2 and 3, the secondary pulverization apparatus 3 includes a cylindrical pulverization tank 9 that is elastically supported via a plurality of coil springs 7 and 7 and is installed on a machine base 8. A vibrator 11 mounted on the lower surface of the crushing tank 9 via a bracket 10 and a ceramic spherical body (not shown) that is inserted into the crushing tank 9 and capable of crushing the bulk self-hardening foundry sand glass by applying vibration. Z)).
[0008]
The bottom portion of the pulverizing tank 9 has a triple structure, and a metal mesh 12 having a mesh size of 2.0 mm or less through which single-particle self-hardening foundry sand can pass is stretched horizontally at the top. Further, a bottom plate main body 13 inclined to the right is mounted at the middle position. Further, an impurity discharge chute 14 is provided above the wire mesh 12 on the trunk wall of the crushing tank 9, and a single-particle self-hardening foundry sand discharge chute 15 is provided above the bottom plate body 13. The single-particle self-hardening foundry sand is discharged from the single-particle self-hardening foundry sand discharge chute 15. As shown in FIG. 1, a hopper 16 for temporarily storing self-hardening foundry sand is disposed directly below the sieve device 2. The ceramic spherical body has a diameter of about 30 mm and is charged in an amount of 70 to 100 pieces (an amount that can be accommodated within the crushing tank 9).
[0009]
In such a configuration, the self-hardening mold after pouring is separated under a state in which the vibrator 11 of the secondary pulverizing apparatus 3 is driven to give vibration to the pulverizing tank 9 and the ceramic spherical body. The recovered sand containing the self-hardening foundry sand that has been collected is put into the primary pulverizing apparatus 1 and pulverized to form the self-hardening foundry sand into a small lump. After removing metal impurities such as cooling metal and wire contained in the recovered sand, the collected sand is put into the sieve device 2 to collect the recovered sand and the self-hardened foundry sand and the massive self-hardened foundry sand. Separated into galleys. The self-hardening foundry sand thus separated is stored in the temporary hopper 16, while the bulk self-hardening foundry sand is put into the secondary grinding device 3 to collide with the grinding tank 9 and the ceramic spherical body, and the ceramic spherical body. Further pulverization is performed by the collision between each other, and the massive self-hardening foundry sand is made into single-particle self-hardening foundry sand. Thereafter, the self-hardening foundry sand and the single-particle self-hardening foundry sand in the hopper 16 are fed into the regenerator (not shown) by the belt conveyor 4. In addition, the small iron piece mixed in the lump-shaped self-hardening foundry sand glass is discharged | emitted from the chute | shoot 14 for impurity discharge with the uncrushed self-hardening foundry sand glass.
[0010]
In addition, as shown in FIG. 4, you may provide the chute | shoot 14 for impurity discharge, and the chute | shoot 15 for single-particle self-hardening foundry sand discharge | emission on the same side, respectively. In addition, when the amount of iron pieces mixed in the collected sand is small, the iron pieces in the collected sand may be periodically removed manually, and the impurity discharge chute 14 may be omitted.
[0011]
【The invention's effect】
As is apparent from the above description, the present invention is a method for treating the recovered sand before reclaiming treatment for separating and reclaiming the self-hardening mold after pouring, and containing self-hardening foundry sand. The recovered sand is pulverized to make the self-hardened foundry sand glass into a small lump, the iron pieces are removed from the crushed recovered sand, and the recovered sand from which the iron pieces have been removed is separated from the self-hardened foundry sand and the lump-shaped self A step of separating into hard cast sand glass, a step of further pulverizing the separated bulk self-hardened cast sand glass into a monoparticulate self-hardened foundry sand, and the pulverized self-hardened foundry sand and single-particle self-hardened cast product. And the step of feeding the sand into the regenerator. Therefore, when the recovered sand containing the self-hardening cast sand glass is regenerated, it has excellent practical effects such as being able to be in a very suitable state.
[Brief description of the drawings]
FIG. 1 is a schematic front view showing an embodiment of the present invention.
FIG. 2 is an enlarged detail view of part A in FIG.
FIG. 3 is a plan view of FIG. 2;
4 is a drawing of an apparatus showing another embodiment of the apparatus shown in FIG. 2, in which A is a plan view and B is a front view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Primary crusher 2 Sieve device 3 Secondary crusher 4 Belt conveyor 6 Magnetic separator

Claims (6)

It is a method of treating the collected sand before reclaiming treatment when separating and recovering the self-hardening mold after pouring,
Crushing the recovered sand containing self-hardening foundry sand to make the self-hardening foundry sand into a small lump,
Removing iron pieces from the crushed recovered sand;
Separating the recovered sand from which the iron pieces have been removed into self-hardening foundry sand and massive self-hardening foundry sand,
A step of further crushing the separated massive self-hardening foundry sand into a single-particle self-hardening foundry sand,
Sending the pulverized self-hardening foundry sand and single-particle self-hardening foundry sand to a regenerator;
A method for pretreatment of self-hardening foundry sand, comprising: In the pre-regeneration method of self-hardening foundry sand according to claim 1,
A pre-regeneration method for self-hardening foundry sand characterized in that pulverization of massive self-hardening foundry sand into single-particle self-hardening foundry sand is performed by a plurality of ceramic spherical bodies vibrating in a vibrating grinding tank. When dismantling and recovering the self-hardening mold after pouring, it is a facility for processing the recovered sand before reprocessing,
A primary pulverizing apparatus for crushing the recovered sand containing self-hardening foundry sand and crushing the self-hardening foundry sand into a small lump;
A separation device for separating the crushed recovered sand into self-hardening foundry sand and massive self-hardening foundry sand;
An iron piece removing device for removing iron pieces from the crushed recovered sand;
A secondary pulverizing apparatus that further pulverizes the separated bulk self-hardening foundry sand into a single-particle self-hardening foundry sand;
A conveying device for feeding the pulverized self-hardening foundry sand and single-particle self-hardening foundry sand into a regenerator;
A self-hardening foundry sand pretreatment facility characterized by comprising: In the pre-regeneration facility for self-hardening foundry sand according to claim 3,
The secondary crusher
A pulverization tank which is elastically supported and has a bottom portion through which single-particle self-hardening foundry sand can pass and which can be charged with massive self-hardening foundry sand;
A vibrator that vibrates the grinding tank;
A ceramic spherical body that is charged in the crushing tank and capable of crushing massive self-hardening cast sand glass by applying vibration;
A self-hardening foundry sand pretreatment facility characterized by comprising: In the self-hardening foundry sand pretreatment facility according to claim 4,
A self-hardening foundry sand pretreatment facility, wherein the size of the mesh at the bottom of the crushing tank is 2.0 mm or less. In the self-hardening foundry sand pretreatment facility according to claim 4,
The ceramic spherical body has a diameter of 20 to 60 mm, and is a pretreatment facility for self-hardening foundry sand regeneration.

Images