CN221231531U - Regeneration system of resin reclaimed sand - Google Patents

Abstract

The utility model relates to a regeneration system of resin regenerated sand, which comprises: a vibration shakeout machine for vibrating and dispersing the sand blocks taken out from the sand box into small blocks; a crushing and screening machine for crushing small pieces of sand into sand grains and filtering out the sand pieces; a pneumatic transmitting device for breaking resin and sticky matters on the surface of sand grains; a wind separation device for separating the mixture of sand particles, resin and adhesive; the utility model has the advantage of improving the winnowing efficiency.

Description

Regeneration system of resin reclaimed sand

Technical Field

The utility model relates to the technical field of casting, in particular to a regeneration system of resin regenerated sand.

Background

A conventional marine cylinder block (a cylinder block of a marine diesel engine) is a main body of an engine, which integrally connects each cylinder and a crankcase, and is a supporting skeleton to which pistons, a crankshaft, and other parts and accessories are mounted.

As shown in fig. 1, the marine cylinder block is designed in the following dimensions: the marine cylinder block is extremely large in size, as can be seen from this dimension, and is extremely complex in construction on the basis of its inner and outer surfaces, typically by casting, with a length approaching 5550mm, a height approaching 1700mm, and a width approaching 1500 mm.

Because the volume of the marine cylinder body casting is large, the casting is required to have high dimensional accuracy and good compactness. The internal structure mainly comprises a water channel on the left side and the right side, a tappet chamber on the left side and the right side, a main oil duct and the like, and because the appearance of the large-scale marine cylinder block is ultra-long, ultra-high and huge in volume, the size of certain holes on the marine diesel cylinder block is very large, as shown in fig. 1, the marine cylinder block comprises a marine cylinder block body A, the marine cylinder block body A is provided with a plurality of first holes B and second holes C on the upper end face and the lower end face close to the front side wall and the rear side wall, the first holes B are communicated with the second holes C, and the first holes B and the second holes C form step holes.

The design height of the first hole B is approximately 1400mm, the length dimension of the first hole B is approximately 180mm, the design height of the second hole C is approximately 300mm, and the length of the second hole C is approximately 40mm.

Since the size of the finally formed hole is determined by the size of the sand mold, the size of the sand mold used for forming the first hole B and the second hole C must be identical to the design size, although the sand mold manufactured by using the resin sand in the process of manufacturing the core has a certain strength, according to the size of the sand mold, the first sand mold forming the first hole B is very high in weight, and according to the length-to-height ratio of the first hole B, the first sand mold is an elongated member, and the height and the inner diameter of the second hole C are very small compared with the first hole B, and the second sand mold is used for supporting the first sand mold in the casting process, so that the second sand mold is damaged under the influence of the weight of the first sand mold and the high temperature in the casting process, thereby causing the first sand mold to fail in the casting process, and finally causing casting failure due to the fact that the marine cylinder block is a large-volume casting, the casting is complicated in the process of manufacturing the core, the casting core is high in the casting cost, and the casting cost is greatly increased once the casting cost is greatly increased.

In addition, in the casting process, the main material of the casting mould is resin sand, and the resin sand can be prepared by mixing new sand, resin and curing agent through a sand mixer; or the resin sand is prepared by mixing the resin reclaimed sand with resin and a curing agent again through a sand mixer. The resin reclaimed sand refers to reclaimed resin reclaimed sand obtained by mixing new sand with resin and curing agent through a sand mixer and then performing corresponding process treatment. It follows that it is critical to treat the old resin with the corresponding equipment to enable the sand to be reused. At present, the old resin sand is crushed, impacted and separated to obtain regenerated sand grains, however, the existing separation process adopts a simple separation machine, and the separation efficiency of the separation machine is lower.

Disclosure of utility model

The utility model provides a regeneration system of resin regenerated sand for improving winnowing efficiency.

A regeneration system for resin-regenerated sand, comprising:

a vibration shakeout machine for vibrating and dispersing the sand blocks taken out from the sand box into small blocks;

a crushing and screening machine for crushing small pieces of sand into sand grains and filtering out the sand pieces;

A pneumatic transmitting device for breaking resin and sticky matters on the surface of sand grains;

a wind separation device for separating the mixture of sand particles, resin and adhesive;

The air separation device comprises an air separation box, a distributing device, a roller and an air extractor, wherein the air separation box comprises a box body, a first sand guide plate and a second sand guide plate, a feeding hole is formed in the upper portion of the box body, the distributing device is matched with the feeding hole, a discharging hole is formed in the lower portion of the box body, the first sand guide plate and the second sand guide plate are located in the box body and are oppositely arranged, a sand passing channel is formed between the first sand guide plate and the second sand guide plate, a first inclined plane and a second inclined plane are arranged on the first sand guide plate, the first inclined plane and the second inclined plane are connected and form an included angle, and a third inclined plane is formed on the second sand guide plate;

The roller is arranged in the sand passage, the roller is matched with the output end of the distributing device, a first extraction opening matched with the sand passage is arranged on the second sand guide plate, a second extraction opening matched with the sand passage is arranged at the lower part of the box body, the second extraction opening is matched with the discharge opening, and the air extractor is respectively connected with the first extraction opening and the second extraction opening.

The working process of the utility model is as follows: the mixture that sand grain and resin and viscidity thing are constituteed reaches the roller after exporting from the distributing device, and the roller throws the mixture when rotatory, makes the mixture drop in the sand passageway along parabolic orbit, and the air exhauster is taken off light resin and viscidity thing from first extraction opening, carries out the first selection by winnowing, and heavy sand grain falls on the first sand guide plate and slides along first sand guide plate to the third inclined plane, and then slides along the third inclined plane towards the discharge gate, and the air exhauster is taken off the resin and the viscidity thing that clamp in the sand grain from the second extraction opening, carries out the selection by winnowing again. The utility model makes the mixture move along different tracks, and in each process, the mixture is sucked by the air extractor, so that the resin and the sticky matters are sucked away, and the air separation efficiency is improved.

Drawings

Fig. 1 is a sectional view of a block body for a ship.

Fig. 2 is a schematic view of casting a marine cylinder block.

Fig. 3 is a schematic view of the positioning plate body combined with the other end of the sand core mold.

Fig. 4 is a schematic view of a crushing and screening machine.

Fig. 5 is a perspective view of the crusher.

Fig. 6 is a cross-sectional construction view of the crusher in a first position.

Fig. 7 is a cross-sectional construction view of the crusher in a second position.

Fig. 8 is a perspective view of a screen assembly.

Fig. 9 is a cross-sectional view of a screen assembly.

Fig. 10 is an enlarged view of the P portion in fig. 9.

Fig. 11 is a sectional view of the wind separation device.

Fig. 12 is a side view of the dispenser.

Fig. 13 is a cross-sectional view of the dispenser.

Fig. 14 is a structural view of a ladle.

The reference symbols in the drawings:

The cylinder body A, the first hole B, the second hole C, the sand core sand mould D, the outer mold sand mould E, the first datum line E1 and the second datum line E2.

Graphite 1, steel pipe 2, locating plate body 3, first through-hole 3a, reference hole 3b, first reference surface 3b1, second reference surface 3b2, first breach 3c, first locating surface 3c1, second breach 3d, second locating surface 3d1, mounting hole 3e, spheroidization package 4 bottom, portion dykes and dams 5.

Conveyor 11, feed hopper 12, crusher 13, housing 13a, shaft 13b, first spacer 13c, drive mechanism 13d, support plate 13e, first mandrel 13f, second spacer 13g, crushing arm 13h, screen 13i, strip member 13j, first bracket 14, screen assembly 15, screen seat 16, elastic member 17, base 18, vibration driver 19.

The air separation box 20, the box body 20a, the feed inlet 20a1, the discharge outlet 20a2, the first sand guide plate 20b, the second sand guide plate 20c, the first inclined surface 20d, the second inclined surface 20e, the third inclined surface 20f, the distributing device 21, the roller 22, the air extractor 23, the sand passage 24, the shell 21a, the first driving mechanism 21b, the inlet 21c, the outlet 21d, the accommodating groove 21e, the partition part 21g, the cutter shaft 21h, the scraper 21, the driving mechanism 21j and the roller body 21f.

Detailed Description

As shown in fig. 1 to 14, a method for manufacturing a marine cylinder block includes the steps of:

S1, respectively manufacturing an outer mold sand mold E and a loam core sand mold D of a first hole B, which are used for forming a marine cylinder body A after casting, by adopting resin sand, installing graphite 1 in a steel pipe 2 to form a support body, and assembling the loam core sand mold D and the support body in the outer mold sand mold E to form a casting mold, wherein the support body supports one end of the loam core sand mold D. The wall thickness of the steel pipe 2 is larger than 5mm, the heights of the graphite 1 and the steel pipe 2 are consistent, and a support body consisting of the graphite 1 and the steel pipe 2 is inserted into the sand core sand mold D from the lower end of the sand core sand mold D, wherein the insertion depth is not smaller than 20mm. After the casting is completed, the resin sand is taken out, and when the cast blank is machined, graphite and the steel pipe 2 are cut off by machining, thereby forming the second hole C.

The support body composed of graphite 1 and steel pipe 2 has the following functions: the local strength of the sand core sand mould D is enhanced when the sand core sand mould D is supported, and the support body has good strength and heat resistance and cannot be damaged in the molten iron casting process, so that the sand core sand mould D can be ensured to be supported all the time in the molten iron casting process, and casting failure caused by falling of the sand core sand mould D under the condition of losing the support is avoided. In addition, the support body consisting of the graphite 1 and the steel pipe 2 has a cooling effect on molten iron, so that the compact and defect-free structure of the part corresponding to the support body on the product can be ensured.

Because one end of the sand core mould D for forming the first hole B is supported and positioned, because the sand core mould D is an elongated member, the sand core mould D is easily deflected due to the influence of gravity if both ends thereof are not restrained, thereby resulting in the reduction of casting accuracy. Therefore, in S1, the other end of the sand core sand mold D is exposed outside the outer mold sand mold E, the other end of the sand core sand mold D is positioned by the positioning plate F, and after the sand core sand mold D is located at the center position of the outer mold sand mold E for forming the first hole B, the positioning plate F is fixed to the outer mold sand mold E. Therefore, the two ends of the sand core sand mold D can be positioned, so that the position accuracy of the sand core sand mold D is ensured, and the casting accuracy of the first hole B and the second hole C is ensured.

As shown in fig. 3, in this embodiment, the locating plate F includes a locating plate body 3, a first through hole 3a matched with the sand core mold D is provided on the locating plate body 3, the other end of the sand core mold D is tapered, and after the first through hole 3a is matched with the other end of the sand core mold D, the locating precision is improved. The locating plate body 3 is further provided with a reference hole 3B, one of the wall surfaces in the reference hole 3B is a first straight reference surface 3B1, one end of the locating plate body 3 is provided with a first notch 3c, one of the wall surfaces in the first notch 3c is a first straight locating surface 3c1, the centers of the first locating surface 3c1, the first reference surface 3B1 and the first through hole 3a are located on the same plane, the outer mold sand mold E is provided with a first reference line E1, the first reference line E1 is arranged along the longitudinal direction Z of the outer mold sand mold E, the first reference line E1 is in a vertical state after being connected with a central line for forming the first hole B, and after the locating plate body 3 is sleeved on the sand core sand mold D through the first through hole 3a, the first locating surface 3c1 and the first reference surface 3B1 are overlapped with the first reference line E1.

The fact that the first positioning surface 3c1 and the first reference surface 3b1 are overlapped with each other with the first reference line E1 means that, when viewed from the front to the back (Z direction) in the front view projection direction in fig. 3, the first positioning surface 3c1 and the first reference surface 3b1 are aligned when viewed from the front view projection direction, and therefore, if the three lines overlap in this direction, it is indicated that the positional accuracy of the sand core mold D in the longitudinal direction Y is ensured by the positioning plate body 3.

Two opposite side walls on the locating plate body 3 are provided with second notches 3d, the two second notches 3d are located on two sides of the first notch 3c, one wall surface in the second notch 3d is a straight second locating surface 3d1, the other wall surface in the reference hole 3b is a straight second reference surface 3b2, and the first reference surface 3b1 and the second reference surface 3b2 are perpendicular to each other in the extending direction. When the locating plate body 3 is sleeved on the sand core sand mold D through the first through hole 3a, the second locating surface 3D1 and the second reference surface 3b2 are overlapped with the second reference line E2 arranged on the outer mold sand mold E, the second reference line E2 is arranged along the transverse direction X of the outer mold sand mold E, the second reference line E2 can be a reference line specially arranged, or the side edge of the outer mold sand mold E can be used as the second reference line E2, and in the embodiment, the side edge of the outer mold sand mold E is preferentially used as the second reference line E2.

The second positioning surface 3D1 and the second reference surface 3b2 overlap with the second reference line E2 provided in the outer mold sand mold E, which means that the positioning plate body 3 ensures the positional accuracy of the sand mold D in the lateral direction X when viewed from the front to the back (Z direction) in the front view projection direction in fig. 3, since the second positioning surface 3D1 and the second reference surface 3b2 are aligned when viewed from the front view projection direction, if the three lines overlap in this direction.

The locating plate body 3 is provided with a plurality of mounting holes 3E, when the position of the sand core sand mould D is located through the locating plate F, namely through the action of the locating plate body 3, the position accuracy of the sand core sand mould D in the longitudinal direction Y and the transverse direction X is ensured, and the inserting part is inserted into the outer mould sand mould E after passing through the mounting holes 3E, so that the locating plate body 3 is fixed. The plug-in components can adopt nails or pins, a plurality of plug-in components are inserted into the outer mould sand mould E, so that the position of the locating plate body 3 is kept, and the position of the sand core sand mould D is kept.

Because the casting mould is the key of casting success or failure, the support body formed by the graphite 1 and the steel pipe 2 and the locating plate F are adopted to support and prop up the slender sand core sand mould D, so that the quality of the casting mould is ensured, and the problem of casting failure caused by collapse of the sand core sand mould D during casting is solved. Because the main material of the casting mould is resin sand, the resin sand can be prepared by mixing new sand with resin and curing agent through a sand mixer; or the resin sand is prepared by mixing the resin reclaimed sand with resin and a curing agent again through a sand mixer. Wherein, the resin consumption is 0.8-1.2% of the weight of the sand; the usage amount of the curing agent is 60-70% of the usage amount of the resin. In the sand mixer, liquid resin and curing agent are both sprayed in two stirring cages, and the nozzle of the resin is positioned at the downstream of the nozzle of the curing agent, so that sand grains are mixed with the curing agent and then mixed with the resin.

In this embodiment, the regeneration step of the resin-regenerated sand is as follows:

s11, vibrating and scattering the sand blocks taken out of the sand box into small blocks by adopting a vibrating shakeout machine.

S12, crushing small sand blocks into sand grains through a crushing and screening machine and filtering out the sand blocks. As shown in fig. 4, the crushing and screening machine comprises a conveyor 11, a feed hopper 12, a crusher 13, a first support 14, a screen assembly 15, a screen deck 16, an elastic member 17, a base 18, and a vibration drive 19, and the following is a detailed description of the relationship between the parts:

The conveyer 11 cooperates with the feed inlet of feeder hopper 12, and the input of breaker 13 is connected with the discharge gate of feeder hopper 12, and breaker 13 is installed on first support 14, and the gravity of breaker 13 is mainly supported by first support 14.

As shown in fig. 5 to 7, the crusher 13 includes a housing 13a, a rotating shaft 13b, a first spacer 13c, a driving mechanism 13d, a supporting plate 13e, a first mandrel 13f, a second spacer 13g, a crushing arm 13h, and a filter screen 13i, wherein a crushing chamber is disposed in the housing 13a, an input port and an output port are disposed on the housing 13a, the rotating shaft 13b penetrates through the housing 13a to be in rotating fit with the housing 13a, the rotating shaft 13b is connected with the driving mechanism 13d, a plurality of first spacers 13c and a plurality of supporting plates 13e are alternately sleeved on the rotating shaft 13b, two adjacent supporting plates 13e are separated and positioned by the first spacer 13c, the first mandrel 13f penetrates through the plurality of supporting plates 13e and then is connected with the end of the first mandrel 13f by nuts, the second spacer 13g is sleeved on the first mandrel 13f, one end of the crushing arm 13h is fixed with the first mandrel 13f, two sides of the crushing arm 13h are respectively positioned by the second spacer 13g, and the output port of the housing 13a is matched with the filter screen 13 a.

The number of the first mandrels 13f is 4, and a plurality of crushing arms 13h are arranged on each first mandrel 13f, and the crushing arms 13h on two adjacent first mandrels 13f are arranged in a staggered manner.

The present embodiment further includes a plurality of strip members 13j located in the housing 13a, the strip members 13j being arranged at intervals along the circumferential direction of the housing 13a, the strip members 13j being located outside the crushing arms 13h with a gap between the other end of the crushing arms 13h and the strip members 13 j.

When the resin sand in the form of a block is fed into the crusher 13 through the conveyor 11, the driving mechanism 13d drives the rotating shaft 13b to rotate, so that the supporting plate 13e and the crushing arm 13h arranged on the rotating shaft rotate along with the rotating shaft 13b, the resin sand in the form of a block is impacted and scattered by the rotating crushing arm 13h, the crushed resin sand obtains kinetic energy from the crushing arm 13h and is impacted to the inner wall of the shell 13a or the strip-shaped part 13j to form collision so as to crush the resin sand again, the resin sand after crushing for a plurality of times forms small particles, the resin sand with the aperture smaller than the filter screen 13i is discharged out of the crusher 13 and enters the screening assembly 15, and the individual large resin sand blocks are impacted and crushed on the shell 13a through the crushing arm 13h, so that the particles capable of passing through the filter screen 13i are finally formed.

The crusher 13 of the present utility model is constructed so that the resin sand in the form of a block can be repeatedly hit until the resin sand can pass through the screen 13i, and therefore, the crusher 13 of the present utility model has advantages of reasonable combination and high sand discharge efficiency.

As shown in fig. 8 to 10, in this embodiment, a plurality of screen assemblies 15 are arranged, the screen assemblies 15 are overlapped, the apertures from the screen assembly 15 at the top layer to the screen assembly 15 at the bottom layer are sequentially reduced, the screen assembly 15 at the bottom layer is fixed to the screen seat 16, the screen seat 16 is connected to one end of the elastic member 17, the other end of the elastic member 17 is connected to the base 18, the vibration driver 19 is connected to the screen seat 16, and the vibration driver 19 preferably adopts a vibration motor. The elastic member 17 preferably adopts a spring, and connecting posts are arranged on the screening seat 16 and the base 18, and the elastic member 17 is matched with the connecting posts arranged on the screening seat 16 and the base 18.

After the resin sand particles enter the screen assemblies 15, the vibration driver 19 works, the vibration force generated by the vibration driver 19 is transmitted to the screen seats 16, and as the screen seats 16 are supported on the base 18 through the elastic components 17, the multiple layers of screen assemblies 15 vibrate together, so that the resin sand in the screen assemblies 15 moves, if the particle size of the resin sand in the current layer is larger than the pore size of the screen assemblies 15, the resin sand moves towards the discharge opening of the screen assemblies 15 in the current layer under the action of the vibration force, and if the particle size of the resin sand is smaller than the pore size of the screen assemblies 15, the holes in the resin sand through-hole screen assemblies 15 fall into the screen assemblies 15 in the next layer to continue screening.

Each screen assembly 15 includes a screen body 15a, an inner support body 15c, a screen 15d, and a discharge guide member 15e, wherein a first annular support member 15b is provided on an inner wall surface of the screen body 15a, a part of the inner support body 15c is located in an upper screen body 15a of two adjacent screen assemblies 15, another part of the inner support body 15c is located in a lower screen body 15a of two adjacent screen assemblies 15, one end of the inner support body 15c is engaged with the first annular support member 15b located in the lower screen body 15a, a screen 15d is connected with the other end of the inner support body 15c, a discharge port 15f is provided on each screen body 15a, one end of the discharge guide member 15e is engaged with the discharge port 15f, and resin sand having a particle diameter larger than a current aperture of the screen 15d is discharged through the discharge guide member 15 e.

The structure also comprises a baffle 15g for blocking resin sand to directly pass through the discharge opening 15f, one end of the baffle 15g is fixed with the inner wall surface of the screen body 15a, and the baffle 15g is inclined to the discharge opening 15f, so that most of resin sand with the particle size smaller than that of the screen 15d on the current layer can be prevented from being discharged from the discharge opening of the screen assembly 15 on the current layer.

Each screen assembly 15 further includes an inner support 15h, the inner support 15h is fixed to the screen body 15a, the inner support 15h in the screen assembly 15 on the topmost layer supports the crusher 13, and the inner supports 15h in the remaining layers support the screen 15d, so that the strength of the screen 15d and the flatness of the screen 15d can be increased, and resin sand with a particle size close to the aperture of the screen 15d is prevented from being stuck in the mesh.

S13, impacting the sand grains by adopting a pneumatic transmitting device to break and fall off the resin and the sticky matters on the surface of the sand grains. The pneumatic transmitting device consists of a cyclone sand conveying mechanism and a rotary impact disc assembly, wherein the cyclone sand conveying mechanism enables compressed air to flow in a cyclone mode, so that resin sand is impacted with the rotary impact disc assembly in a cyclone mode, and the resin sand forms a cyclone angle when flowing, so that the resin sand is also angled when impacting with the rotary impact disc assembly, vertical impact force and tangential friction force are generated between the resin sand and the rotary impact disc assembly, the surface of the resin sand is ground, and resin and sticky matters coated on the surface of the sand are separated from the sand materials, so that a mixture of the sand, the resin and the sticky matters is obtained.

S14, adopting a winnowing device to winnow the mixture of sand grains, resin and sticky matters, and separating the resin, the sticky matters and the sand which does not meet the use requirements from qualified sand.

As shown in fig. 11, the air separation device includes an air separation box 20, a distributing device 21, a roller 22, and an air extractor 23, where the air separation box 20 includes a box 20a, a first sand guiding plate 20b, and a second sand guiding plate 20c, a feed inlet 20a1 is provided at an upper portion of the box 20a, the distributing device 21 is matched with the feed inlet, a discharge outlet 20a2 is provided at a lower portion of the box 20a, the first sand guiding plate 20b and the second sand guiding plate 20c are located in the box 20a and are oppositely arranged, a sand passing channel 24 is formed between the first sand guiding plate 20b and the second sand guiding plate 20c, a first inclined plane 20d and a second inclined plane 20e are provided on the first sand guiding plate 20b, the first inclined plane 20d and the second inclined plane 20e are connected to form an included angle, and a third inclined plane 20f is formed on the second sand guiding plate 20 c.

The roller 22 is arranged in the sand passage 24, the roller 22 is matched with the output end of the distributing device 21, a first air extraction opening matched with the sand passage 24 is arranged on the second sand guide plate 20c, a second air extraction opening matched with the sand passage 24 is arranged at the lower part of the box 20a, the second air extraction opening is matched with the discharge opening 20a2, and the air extractor 23 is respectively connected with the first air extraction opening and the second air extraction opening.

The mixture of sand grains, resin and sticky matters is output from the distributor 21 and then reaches the roller 23, the roller 23 casts the mixture when rotating, the mixture falls down in the sand passing channel 24 along a parabolic track, the air extractor 23 extracts the light resin and sticky matters from the first extraction opening, the first air separation is carried out, the heavy sand grains fall onto the first sand guide plate 20b and slide to the third inclined surface 20f along the first sand guide plate 20b, then slide to the discharge opening 20a2 along the third inclined surface 20f, and the air extractor 23 extracts the resin and sticky matters clamped in the sand grains from the second extraction opening, and the air separation is carried out again.

As shown in fig. 12 and 13, the distributing device 21 in this embodiment includes a housing 21a, a first driving mechanism 21b, and a distributing roller, wherein an inlet 21c is provided at an upper portion of the housing 21a, an outlet 21d is provided at a lower portion of the housing 21a, the distributing roller is preferably made of metal, the distributing roller is located in the housing 21a, two ends of the distributing roller are rotatably mounted on the housing 21a, the first driving mechanism 21b is connected with one end of the distributing roller, and in this embodiment, the first driving mechanism 21b is composed of a motor and a decelerator connected with the motor, and the decelerator is connected with one end of the distributing roller.

The circumferential surface of the part of the distribution roller positioned in the shell 21a is directly provided with a plurality of containing grooves 21e for receiving materials from the feeding hole, the part between two adjacent containing grooves 21e is a separation part 21g for forming a fit with the inner wall surface of the shell 21a, and the fit between the separation part 21g and the inner wall surface of the shell 21a can be small clearance fit, for example, a clearance smaller than 1mm or a state that the two parts are sealed. The receiving groove 21e extends along the axial direction of the distributing roller and penetrates the axial end surface of the distributing roller. The surface of the accommodating groove 21e is provided with a polytetrafluoroethylene coating. Polytetrafluoroethylene has the characteristic of low friction coefficient, and polytetrafluoroethylene coating surface is smooth, and the material adhered on polytetrafluoroethylene coating surface is easy to clear up in general scrubbing assembly.

In the utility model, after the accommodating groove 21e is directly arranged on the circumferential surface of the distributing roller, since the volume of the material input by the feeding hole is larger than that of the accommodating groove 21e, the material placed in the accommodating groove 21e overflows out of the notch of the accommodating groove 21e at the position corresponding to the feeding hole, when the distributing roller rotates, the accommodating groove 21e filled with the material rotates along with the distributing roller, when the accommodating groove 21e starts to correspond to the inner wall surface of the shell 21a, the space between the accommodating groove 21e and the inner wall surface of the shell 21a is constant, at the moment, the material of the notch of the accommodating groove 21e is blocked by the shell 21a and is left in the feeding hole, and only the material in the accommodating groove 21e is left, therefore, the material in each accommodating groove 21e is basically equal, and the material is uniform during discharging. In addition, since the material of the cloth roller itself is metal and the partition portion 21g is a part of the cloth roller, the partition portion 21g can prevent deterioration and reduce loss because the rubber member is not required to be attached to the cloth roller and the partition portion 21g is directly engaged with the inner wall surface of the housing 21 a.

The cloth roller comprises a roller body 21f and a shaft head (not shown in the figure), wherein the roller body 21f is positioned in the shell 21a, the accommodating groove 21e is formed in the peripheral surface of the roller body 21f, and the shaft head is fixed on the axial end surface of the roller body 21 f. The roller body 21f may be a solid structure or a hollow structure, and the shaft head and the roller body are integrally formed, or the shaft head 36 and the roller body are integrally fixed by welding. A first bearing is mounted on the housing 21a, and the stub shaft is connected to the first bearing so that the cloth roll can rotate relative to the housing 21 a.

The present embodiment further includes a decontamination module to be attached to the surface of the housing groove 21e for cleaning, at least a portion of the decontamination module being located in the outlet 21 d. The surface of the accommodating groove 21e is scraped and cleaned by the dirt removing assembly, so that scaling on the surface of the accommodating groove 21e can be avoided, the material loading capacity of the accommodating groove 21e is ensured, and the working efficiency of the material discharger is ensured.

The dirt removing assembly comprises a cutter shaft 21h, a scraper 21i and a transmission mechanism 21j, wherein two ends of the cutter shaft 21h are rotatably arranged on a shell 21a, the cutter shaft 21h penetrates through a discharge hole of the shell 21a, a second bearing is arranged on the shell 21a, and the cutter shaft 21h is connected with the second bearing, so that the cutter shaft 21h can rotate relative to the shell 21a. One end of the scraper 21i is fixed with the cutter shaft 21h, the other end of the scraper 21i is a free end for scraping the accommodating groove 21e, and the transmission mechanism 21j is respectively connected with the cutter shaft 21h and the cloth roller.

The two blades 21i are uniformly distributed on the cutter shaft 21h, and the continuously rotating cutter shaft 21h alternately scrapes the continuously rotating accommodating groove 21e by the two blades 21 i. That is, each half revolution of the cutter shaft 21h, one scraper 21i scrapes one receiving groove 21e on the cloth roller during rotation. Since the cross section of the receiving groove 21e is arc-shaped, the scraper 21i is easy to handle at the time of scraping.

In this embodiment, the transmission mechanism 21j includes a first gear fixed to the cloth roller and a second gear fixed to the cutter shaft 21h, and the first gear and the second gear are meshed. When the cloth roller rotates, the transmission mechanism 21j is driven to work, the transmission mechanism 21j drives the cutter shaft 21h to rotate, and the scraper 21i positioned on the cutter shaft 21h rotates, so that scraping and cleaning work is formed on the accommodating groove 21 e. The advantage of this construction is that both the cloth roller and the dirt removal assembly are driven by the first drive mechanism 21b and the transmission mechanism 21 j. The device has the advantages of small occupied space and reduced cost.

S2, as shown in FIG. 14, firstly paving a nodulizer in a first side cavity on one side of a dyke 5 at the bottom of the nodulizing ladle 4, paving a first inoculant on the nodulizer, wherein the total height of the nodulizer and the first inoculant is lower than that of the dyke 5, the distance between the upper surface of the first inoculant and the upper surface of the dyke 5 is at least 30mm, and after paving the nodulizer and the first inoculant, beating the paved first inoculant and the nodulizer by adopting a beater, so that the first inoculant and the nodulizer are tamped, and the beater adopts a hammer preferentially.

In this embodiment, the chemical components of the nodulizer are: mg:6.8%; re:1.2%; si:42%; ca:1.7%; ba:1.3%; al:0.5%; mgO:0.3 percent, wherein the granularity of each component is 5-25mm and more than 95 percent of the total amount of the nodulizer.

The chemical components of the first inoculant are as follows: si:75%; ba:2%; ca:1.5%; al:0.3% and the balance of Fe; wherein the granularity of each component is 0.2-0.7mm, which accounts for more than 95% of the total amount of the first inoculant.

In this embodiment, the amount of the spheroidizing agent is 1.1% of the total amount of the molten iron to be spheroidized, and the amount of the first inoculant is 0.5% of the total amount of the molten iron to be spheroidized.

S3, pouring the molten iron pouring device to be spheroidized into a spheroidizing ladle 4, enabling the molten iron to perform chemical reaction with the spheroidizing agent and the first inoculant, when the molten iron is poured into the spheroidizing ladle to be 20-30% of the total amount of the residual molten iron, preferentially adopting 25%, enabling the second inoculant to enter the spheroidizing ladle along with the residual molten iron, wherein the total spheroidizing time is 150-300 seconds, and preferentially adopting 280 seconds.

The chemical components of the second inoculant in this embodiment are as follows: si:78%; ba:1.6%; ca:1.4%; al:0.6 percent of Fe and the balance of 0.6 percent of the total amount of the molten iron to be spheroidized, and the second inoculant is different from at least one part of the first inoculant in granularity. In the second inoculant, the granularity of each component is 8-15mm, and the granularity accounts for more than 95% of the total amount of the second inoculant.

S4, pouring the spheroidized molten iron into the casting mould of S1 through a casting mechanism, and forming the molten iron in the casting mould after cooling the molten iron.

During casting, corresponding test blocks are cast at the same time, and the test blocks are used for detection. Detecting the test block attached to the casting in the embodiment, wherein the detected items comprise:

(1) Spheroidal graphite cast iron metallographic examination spheroidization grading and evaluation [ GB/T9441-2009 (4.1) ], grade 90%.

(2) Graphite size and rating of ductile iron metallographic examination [ GB/T9441-2009 (4.2) ], grade 6.

(3) Ductile iron metallographic examination-pearlite number (for less pearlite) [ GB/T9441-2009 (4.3), grade: pearlite 0%.

Inspection conclusion (standard of qualified metallographic structure: spheroidization rate is more than or equal to 90%, ferrite is more than or equal to 90%, cementite is less than or equal to 1%, graphite size is more than 5 grades, and phosphorus eutectic is less than or equal to 1%): qualified, measured value: spheroidization rate 95%, ferrite 95%, cementite: size of graphite: grade 6, phosphorus eutectic: and no.

In addition, chemical component detection was performed on the test pieces subjected to the casting, and the detection results are shown in the following table:

Composition of the components	C	Si	Mn	S	P
						Standard requirements	3.5-3.8	1.7-2.1	≤0.40	≤0.015	≤0.06
Sample detection value	3.68	1.93	0.27	0.01	0.045

And (3) detecting mechanical properties of the test block subjected to the casting, wherein the detection results are shown in the following table:

Claims (7)

1. A regeneration system for resin-regenerated sand, comprising:

a vibration shakeout machine for vibrating and dispersing the sand blocks taken out from the sand box into small blocks;

a crushing and screening machine for crushing small pieces of sand into sand grains and filtering out the sand pieces;

A pneumatic transmitting device for breaking resin and sticky matters on the surface of sand grains;

a wind separation device for separating the mixture of sand particles, resin and adhesive;

The method is characterized in that: the air separation device comprises an air separation box (20), a distributing device (21), a roller (22) and an air extractor (23), wherein the air separation box (20) comprises a box body (20 a), a first sand guide plate (20 b) and a second sand guide plate (20 c), a feeding hole (20 a 1) is formed in the upper portion of the box body (20 a), the distributing device (21) is matched with the feeding hole, a discharging hole (20 a 2) is formed in the lower portion of the box body (20 a), the first sand guide plate (20 b) and the second sand guide plate (20 c) are located in the box body (20 a) and are oppositely arranged, a sand passing channel (24) is formed between the first sand guide plate (20 b) and the second sand guide plate (20 c), a first inclined surface (20 d) and a second inclined surface (20 e) are arranged on the first sand guide plate (20 b), the first inclined surface (20 d) and the second inclined surface (20 e) are connected to form an included angle, and a third inclined surface (20 f) is formed on the second sand guide plate (20 c);

The sand guide device is characterized in that the roller (22) is arranged in the sand passing channel (24), the roller (22) is matched with the output end of the distributing device (21), a first air extraction opening matched with the sand passing channel (24) is formed in the second sand guide plate (20 c), a second air extraction opening matched with the sand passing channel (24) is formed in the lower portion of the box body (20 a), the second air extraction opening is matched with the discharge opening (20 a 2), and the air extractor (23) is connected with the first air extraction opening and the second air extraction opening respectively.

2. The resin reclaimed sand regeneration system according to claim 1, wherein the crushing and screening machine comprises a conveyor (11), a feed hopper (12), a crusher (13), a first bracket (14), a screening assembly (15), a screening seat (16), an elastic component (17), a base (18) and a vibration driver (19), the conveyor (11) is matched with a feed inlet of the feed hopper (12), an input end of the crusher (13) is connected with a discharge outlet of the feed hopper (12), the crusher (13) is mounted on the first bracket (14), the screening assembly (15) is fixed with the screening seat (16), the screening seat (16) is connected with one end of the elastic component (17), the other end of the elastic component (17) is connected with the base (18), and the vibration driver (19) is connected with the screening seat (16).

3. The regeneration system of resin reclaimed sand according to claim 2, wherein the crusher (13) comprises a shell (13 a), a rotating shaft (13 b), a first spacer bush (13 c), a driving mechanism (13 d), a supporting plate (13 e), a first mandrel (13 f), a second spacer bush (13 g), a crushing arm (13 h) and a filter screen (13 i), wherein a crushing cavity is formed in the shell (13 a), an input port and an output port are formed in the shell (13 a), the rotating shaft (13 b) penetrates through the shell (13 a) to be in rotary fit with the shell (13 a), the rotating shaft (13 b) is connected with the driving mechanism (13 d), a plurality of first spacer bushes (13 c) and a plurality of supporting plates (13 e) are alternately sleeved on the rotating shaft (13 b), the two adjacent supporting plates (13 e) are separated and positioned through the first spacer bushes (13 c), the first mandrel (13 f) penetrates through the supporting plates (13 e) and then is connected with the end portions of the first mandrel (13 f) through nuts, the second spacer bushes (13 g) are sleeved on the first mandrel (13 f) and the two sides of the first mandrel (13 e) are respectively matched with the filter screen (13 h) at two sides of the first mandrel (13 f).

4. The resin reclaimed sand reclamation system according to claim 1, wherein the distributing device (21) comprises a housing (21 a), a first driving mechanism (21 b) and a distributing roller, an inlet (21 c) is arranged at the upper part of the housing (21 a), an outlet (21 d) is arranged at the lower part of the housing (21 a), the distributing roller is positioned in the housing (21 a), two ends of the distributing roller are rotatably arranged on the housing (21 a), the first driving mechanism (21 b) is connected with one end of the distributing roller, a containing groove (21 e) is arranged on the peripheral surface of the housing (21 a) of the distributing roller, and a partition part (21 g) for forming fit with the inner wall surface of the housing (21 a) is arranged at the part between two adjacent containing grooves (21 e).

5. The resin-reclaimed sand reclamation system as recited in claim 4, characterized in that the distributor (21) further comprises a decontamination assembly for cleaning the surface of the receiving tank (21 e), at least a portion of the decontamination assembly being located in the outlet (21 d).

6. The resin reclaimed sand reclamation system as recited in claim 5, wherein the dirt removing assembly comprises a cutter shaft (21 h), a scraper (21 i) and a transmission mechanism (21 j), both ends of the cutter shaft (21 h) are rotatably mounted on the housing (21 a), the scraper (21 i) is fixed with the cutter shaft (21 h), and the transmission mechanism (21 j) is respectively connected with the cutter shaft (21 h) and the cloth roller.

7. The regenerating system of resin-bonded sand as claimed in claim 4, wherein the surface of the housing groove (21 e) is provided with a polytetrafluoroethylene coating.