Iron mold sand-shooting hole residual sand cleaning device capable of replacing multiple ejector plates and cleaning method thereof

Abstract

The present invention relates to a device for cleaning residual sand from iron mold sand-shooting holes and a cleaning method thereof, and belongs to the field of machinery. The present invention includes a lifting and compacting cylinder, an upper beam, a column, a base, a compacting workbench and an iron mold lifting seat, a lifting guide rod, an iron mold conveying roller, a push rod plate changing mechanism, an iron mold positioning device and a push rod plate frame trolley access track, the lifting and compacting cylinder is fixed on the base, the upper beam is connected to the base through the column, the compacting workbench and the iron mold lifting seat are connected to the lifting and compacting cylinder, the lifting guide rod is installed on the compacting workbench and the iron mold lifting seat, the iron mold conveying roller is connected to the columns on both sides, the iron mold positioning device is installed on the iron mold conveying roller, the push rod plate frame trolley access track is on the column, and the push rod plate changing mechanism is movably arranged on the push rod plate frame trolley access track. The present invention has a simple and reasonable structure, can clean the residual sand from various iron mold sand-shooting holes with different sand-shooting hole positions, reduces investment costs, reduces floor space, is easy to operate, and meets use requirements.

Description

Technical Field

[0001] The invention relates to a cleaning device and a cleaning method, in particular to a drawer-type iron mold sand-shooting hole residual sand cleaning device with replaceable multiple push rod plates and a cleaning method thereof, which is applied to a top hole machine device for cleaning residual sand in iron mold sand-shooting holes of various iron molds, and belongs to the field of machinery. Background Art

[0002] Iron mold sand-coated casting belongs to special casting. Its main process feature is to cover the inner cavity of the metal mold with a thin layer of coated sand to form a casting mold. Iron mold sand-coated casting has the advantages of energy saving, material saving, high efficiency, high quality, and green production, and its application field is becoming wider and wider. Generally, a sand-coated molding machine is used to cover the inner cavity of the iron mold with a layer of phenolic resin sand, and the sand-coating process is achieved by compressed air sand shooting. The coated sand enters the gap between the iron mold and the model through the sand-shooting hole of the iron mold to form a sand-coated layer, and finally completes the modeling of the casting. Due to the different shapes of the castings produced, different products require different iron molds to match them, and at the same time, corresponding sand-shooting holes are required to match them. Therefore, in the production of iron mold sand-coated castings, the sand-shooting holes of the iron mold are different for different casting products.

[0003] At present, the cleaning of the sand shooting holes of iron molds is mostly completed by the method of pushing the holes with a push rod, that is, a push rod plate corresponding to the position of the sand shooting hole is used on an iron mold, and the position of the push rod corresponds to the position of the sand shooting hole of the iron mold. The push rod on the push rod plate is pressed into the corresponding sand shooting hole of the iron mold by pressure, and the residual sand in the sand shooting hole is pressed out of the sand shooting hole, thereby completing the cleaning of the sand shooting hole of the iron mold. Relatively speaking, the cleaning time of the entire push rod pressing into the sand shooting hole is very short, generally only a few seconds to more than ten seconds.

[0004] In the iron mold sand casting production line, the cleaning time of the iron mold sand shooting holes is very short compared to the sand molding time, accounting for only 1 / 5-1 / 10 of the molding time. That is to say, if the same casting is produced in the iron mold sand casting production, two double-station sand molding machines or three double-station sand molding machines with one iron mold top hole machine can meet the production needs in terms of production efficiency. However, if the production line produces different castings, because the positions of the sand shooting holes of the iron mold are different, two or three molding machines will require a third top hole machine or three top hole machines, which is a waste in terms of production line layout, production line equipment investment, production line floor space, and production line efficiency.

[0005] The Chinese patent with the publication date of July 18, 2012 and the publication number of CN102581234A discloses an invention patent named "Sand-shooting and Sand-cleaning Device for Iron Mold Sand Covering Process". The invention includes a bottom plate, a mandrel distribution plate, and a gasket connected by screws. The bottom plate is arranged above the mandrel distribution plate, the gasket is arranged between the bottom plate and the mandrel distribution plate, a circular through hole is arranged on the mandrel distribution plate, the mandrel is arranged in the circular through hole, the upper end of the mandrel is arranged with a circular hole, a spring is arranged in the circular hole at the upper end of the mandrel, the upper end of the spring is connected to the bottom plate, the iron mold is arranged below the mandrel distribution plate, and the sand-shooting hole on the iron mold is to be directly opposite to the circular through hole on the mandrel distribution plate. Although the present invention can clean iron molds, reduce the labor intensity of workers, and ensure the normal use of sand cleaning equipment, this patent mainly involves the structure of the sand shooting plate in the cleaning of the sand shooting holes of the iron mold. If the structure is used for cleaning the upper and lower iron molds with different shooting holes, two cleaning machines are still required to complete the cleaning process, which increases the investment cost, so it still has the above-mentioned defects.

[0006] Therefore, an iron-type sand-shooting hole top hole device with a reasonable structural design and capable of quickly replacing a top rod plate is particularly necessary. Summary of the invention

[0007] The purpose of the present invention is to overcome the above-mentioned shortcomings in the prior art and to provide a device and a method for cleaning residual sand in iron mold sand shooting holes which has a simple and reasonable structural design, is safe and reliable, can clean residual sand in a variety of iron mold sand shooting holes with different sand shooting holes positions, reduces equipment investment costs, reduces the floor space of the production line, is easy to operate and can replace multiple push rod plates.

[0008] The technical solution adopted by the present invention to solve the above-mentioned problem is: a device for cleaning residual sand in sand-shooting holes of an iron mold with replaceable multiple push rod plates comprises a lifting and compacting cylinder, an upper beam, a column, a base, a compacting workbench, an iron mold lifting seat and a lifting guide rod, wherein the lifting and compacting cylinder is fixed on the base, the upper beam is connected to the base through the column, the compacting workbench and the iron mold lifting seat are connected to the piston rod head of the lifting and compacting cylinder, and the lifting guide rod is installed on the compacting workbench and the iron mold lifting seat, and is characterized in that it also includes an iron mold conveying roller, a push rod plate changing mechanism, an iron mold positioning device and an ejector plate frame trolley entry and exit track, the iron mold conveying roller is connected to the columns on both sides, the iron mold positioning device is installed at the corresponding position of the iron mold conveying roller, the ejector plate frame trolley entry and exit track is fixed on the column, and the ejector plate changing mechanism is movably arranged on the ejector plate frame trolley entry and exit track.

[0009] Preferably, the push rod plate changing mechanism of the present invention includes a drawer-type push rod plate mounting frame trolley track frame, a drawer lifting workbench, a drawer base, a drawer mechanism lifting cylinder, a push rod plate mounting frame trolley, a push rod plate mounting frame trolley in and out moving cylinder, a moving cylinder bracket and a push rod plate. The drawer mechanism lifting cylinder is fixed on the drawer base, the drawer lifting workbench is installed on the piston rod head of the drawer mechanism lifting cylinder, the drawer-type push rod plate mounting frame trolley track frame is fixed on the drawer lifting workbench, the push rod plate mounting frame trolley is arranged on the drawer-type push rod plate mounting frame trolley track frame, the moving cylinder bracket is installed on the drawer base, and the push rod plate mounting frame trolley in and out moving cylinder is fixed on the moving cylinder bracket.

[0010] Preferably, the gap between the upper plane of the top rod plate and the lower plane of the upper beam of the present invention is 3-5 mm.

[0011] Preferably, the number of the push rod plate mounting frame trolleys of the present invention is multiple, and the multiple push rod plate mounting frame trolleys are all arranged on the corresponding drawer-type rails of the drawer-type push rod plate mounting frame trolley rail frame.

[0012] Preferably, the number of drawers of the drawer-type push rod plate mounting frame trolley track frame in the push rod plate changing mechanism of the present invention is the number of required push rod plates plus one drawer position (N+1); in order to facilitate the replacement of the push rod plates, N is the number of replaceable push rod plates in the device of the present application, the number of push rod plate mounting frame trolleys is N, and the highest drawer position is in an empty state during normal production as there is no push rod plate mounting frame trolley placed thereon.

[0013] Preferably, the present invention provides four columns, the bottoms of the four columns are fixed on the base, and the upper parts of the columns are connected to the upper beams, so that the base, the columns and the upper beams form an integral frame structure.

[0014] Preferably, the number of the iron-shaped conveying rollers of the present invention is two, and the two iron-shaped conveying rollers are respectively installed on the columns on both sides.

[0015] Preferably, the lifting guide rod of the present invention slides relatively in the corresponding guide sleeve of the base, and rises and falls with the lifting and lowering of the compaction workbench to ensure that the compaction workbench and the iron mold lifting seat are lifted and lowered smoothly.

[0016] The present invention also provides a method for cleaning residual sand in an iron mold sand-shooting hole with multiple replaceable ejector plates, which is characterized by the following steps:

[0017] (1) Initial state of the device: the mold has not yet entered the mold sand blasting residual sand cleaning station, and the ejector plate changing mechanism is in the initial state, that is, the drawer lifting workbench is in the lowest position, and each ejector plate mounting frame trolley is placed on the drawer-type ejector plate mounting frame trolley track frame;

[0018] (2) The iron mold enters the sand-shooting hole cleaning station, and the corresponding ejector plate enters the sand-shooting hole cleaning station: first, the iron mold that needs to be cleaned of the residual sand in the sand-shooting hole is sent to the iron mold conveying roller of the sand-shooting hole residual sand cleaning station of the device through the external iron mold conveying roller, and the iron mold is positioned by the iron mold positioning device so that it is in the sand-shooting hole top hole cleaning working position; at the same time, the drawer-type ejector plate mounting frame trolley track frame equipped with the corresponding ejector plate is raised by the drawer mechanism lifting cylinder, so that the upper plane of the drawer-type ejector plate mounting frame trolley track frame and the upper plane of the ejector plate frame trolley in and out track are at the same height, and then the ejector plate mounting frame trolley equipped with the corresponding ejector plate is sent from the ejector plate drawer into the iron mold sand-shooting hole cleaning station through the ejector plate mounting frame trolley in and out moving cylinder, so that the ejector on the ejector plate corresponds to the sand-shooting hole of the iron mold one by one;

[0019] (3) Working state of cleaning the sand shooting hole of the iron mold: that is, the lifting and compacting cylinder starts to rise, driving the compacting workbench and the iron mold lifting seat to rise. After hitting the lower plane of the iron mold, it continues to rise, so that the iron mold is separated from the iron mold conveying track and rises together until the residual sand on the sand shooting hole on the upper plane of the iron mold hits the lower plane of the push rod of the push rod plate. Under the action of the rising pressure of the lifting and compacting cylinder, the iron mold, the compacting workbench and the iron mold lifting seat continue to rise, driving the iron mold and the push rod plate to continue to rise together, but the gap between the push rod plate and the upper beam is only 3-5 mm. When the upper plane of the push rod plate hits the lower plane of the upper beam, the push rod plate stops moving. The lifting and compacting cylinder drives the compacting workbench, the iron mold lifting seat and the iron mold to continue to rise. Under the action of the pressure of the lifting and compacting cylinder, the residual sand in the sand shooting hole of the iron mold is gradually pushed out of the sand shooting hole, and finally the top hole cleaning of the residual sand in the sand shooting hole is completed;

[0020] (4) After the residual sand in the sand-shooting holes of the iron mold is cleaned, the iron mold descends to the state on the iron mold conveying roller of the device, that is, the jacking and compacting cylinder descends, driving the compacting workbench and the iron mold jacking seat to descend, and the iron mold descends accordingly, and the iron mold and the ejector plate also descend accordingly. When the wheels of the ejector plate trolley hit the plane on the trolley entry and exit track, it stops descending, the ejector on the ejector plate gradually separates from the iron mold, the jacking and compacting cylinder and the iron mold continue to descend, and after the iron mold continues to descend and hits the iron mold conveying roller, the iron mold stops descending, and the jacking and compacting cylinder drives the compacting workbench and the iron mold jacking seat to continue to descend to the lowest position, so that the compacting workbench and the iron mold jacking seat are completely separated from the iron mold;

[0021] (5) The state of the iron mold after it is moved out of this device, that is, the iron mold is sent out of the iron mold sand-shooting hole cleaning work position of this application document to the iron mold conveying roller outside, thereby completing the cleaning of the residual sand in the iron mold sand-shooting holes; at the same time, the push rod plate mounting frame trolley also moves outward with the piston of the push rod plate mounting frame trolley in and out of the moving cylinder to move it out of the iron mold sand-shooting hole cleaning work station to the corresponding drawer-type push rod plate mounting frame trolley track frame. After moving out to the right position, the drawer mechanism lifting cylinder descends to the lowest position, so that the push rod plate changing mechanism returns to the initial position, completing all the work of cleaning the sand-shooting holes of an iron mold.

[0022] Preferably, the specific installation steps of the push rod plate in the push rod plate changing mechanism of the present invention are as follows: first, the push rod plate installation frame trolley of the push rod plate to be replaced is sent to the top hole position of the iron mold, and then the drawer track that is usually in the highest position and is idle is lowered to the same height as the push rod plate frame trolley in and out track at the iron mold sand shooting hole cleaning station, and then the push rod plate installation frame trolley equipped with the push rod plate is moved out to the topmost idle drawer. Because the top of the top drawer is open, after it is moved into place, the push rod plate can be lifted away by a crane; the installation of the new push rod plate is just the opposite. First, the push rod plate is moved away by a crane. The push rod plate installation frame trolley is hoisted into the topmost idle drawer of the drawer-type push rod plate installation frame trolley track frame in the push rod plate changing mechanism, and then the track height position of the push rod plate installation frame trolley is consistent with the height position of the push rod plate frame trolley in and out track, and the push rod plate installation frame trolley is sent into the iron mold sand shooting hole cleaning station of the device, and then the drawer track plane where the push rod plate is needed to be placed in the push rod plate changing mechanism is raised to the same position as the plane position on the push rod plate frame trolley in and out track of the iron mold sand shooting hole cleaning station, and the push rod plate installation frame trolley is moved out to the push rod plate drawer to complete the installation of the push rod plate.

[0023] Compared with the prior art, the present invention has the following advantages and effects: the overall structural design is simple and reasonable, safe and reliable, and an iron mold sand shooting hole residual sand cleaning device is used for an iron mold sand-covered casting production line to realize cleaning of iron mold sand shooting holes with various sand shooting holes at different positions during the production process; the equipment investment of the iron mold sand-covered casting production line is reduced, the floor space of the production line is reduced, and the automatic control program of the production line is simplified; the push rod plate is easy and quick to replace; the device process control is simple, and the automatic control of the device operation is easy to realize. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structure of the cleaning device of the embodiment of the present invention is shown in FIG. Figure 1 .

[0025] Figure 2 The structure of the cleaning device of the embodiment of the present invention is shown in FIG. Figure 2 .

[0026] Figure 3It is a structural schematic diagram of the top rod plate changing mechanism of an embodiment of the present invention.

[0027] Figure 4 It is a schematic diagram of the initial state of the push rod plate replacement during the installation process of the push rod plate of the cleaning device according to an embodiment of the present invention.

[0028] Figure 5 It is a schematic diagram of the piston rod of the trolley moving cylinder being retracted into place during the installation of the push rod plate of the cleaning device according to the embodiment of the present invention.

[0029] Figure 6 It is a structural schematic diagram of the lifting cylinder being lowered into place during the installation of the push rod plate of the cleaning device according to an embodiment of the present invention.

[0030] Figure 7 It is a structural schematic diagram of moving the piston rod to its proper position during the installation of the ejector plate of the cleaning device according to the embodiment of the present invention.

[0031] Figure 8 It is a structural schematic diagram of the push rod plate trolley being pulled out into place during the installation process of the push rod plate of the cleaning device according to an embodiment of the present invention.

[0032] Fig. 9 It is a structural schematic diagram of lifting out the push rod plate during the installation process of the push rod plate of the cleaning device according to an embodiment of the present invention.

[0033] Fig.10 The figure is a schematic diagram of the initial state of the cleaning work of the iron mold sand shooting hole during the working process of the cleaning device of the embodiment of the present invention. Figure 1 .

[0034] Fig.11 The figure is a schematic diagram of the initial state of the cleaning work of the iron mold sand shooting hole during the working process of the cleaning device of the embodiment of the present invention. Figure 2 .

[0035] Fig.12 The structure diagram of the iron mold entering the working position and the sandblasting plate entering the working position during the working process of the cleaning device of the embodiment of the present invention Figure 1 .

[0036] Fig.13 The structure diagram of the iron mold entering the working position and the sandblasting plate entering the working position during the working process of the cleaning device of the embodiment of the present invention Figure 2 .

[0037] Fig.14 The structure of the cleaning device of the embodiment of the present invention is a schematic diagram of the working state of the iron mold sand shooting hole cleaning process. Figure 1 .

[0038] Fig.15 The structure of the cleaning device of the embodiment of the present invention is a schematic diagram of the working state of the iron mold sand shooting hole cleaning process. Figure 2 .

[0039] Fig.16 The structure of the cleaning device of the embodiment of the present invention is a schematic diagram of the state in which the iron mold sand shooting hole is cleaned during the working process Figure 1 .

[0040] Fig.17 The structure of the cleaning device of the embodiment of the present invention is a schematic diagram of the state in which the iron mold sand shooting hole is cleaned during the working process Figure 2 .

[0041] Fig.18 The structure diagram of the cleaning device of the embodiment of the present invention is as follows: the iron mold is removed from the cleaning device during operation; Figure 1 .

[0042] Fig.19 The structure diagram of the cleaning device of the embodiment of the present invention is as follows: the iron mold is removed from the cleaning device during operation; Figure 2 .

[0043] In the figure: jacking and compacting cylinder 1, iron mold conveying roller 2, jack plate changing mechanism 3, upper beam 4, column 5, base 6, compacting workbench and iron mold jacking seat 7, lifting guide rod 8, iron mold positioning device 9, jack plate frame trolley in and out track 10;

[0044] Push rod plate changing mechanism 3: drawer-type push rod plate mounting frame trolley track frame 31, drawer lifting workbench 32, drawer base 33, drawer mechanism lifting cylinder 34, push rod plate mounting frame trolley 35, push rod plate mounting frame trolley in and out moving cylinder 36, moving cylinder bracket 37, push rod plate 38. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0046] Example

[0047] See also Figures 1 to 19 The iron mold sand-shooting hole residual sand cleaning device capable of replacing multiple push rod plates in this embodiment comprises a lifting and compacting cylinder 1, an iron mold conveying roller table 2, a push rod plate changing mechanism 3, an upper beam 4, a column 5, a base 6, a compacting workbench and an iron mold lifting seat 7, a lifting guide rod 8, an iron mold positioning device 9 and a push rod plate frame trolley entry and exit track 10.

[0048] In this embodiment, the jacking and compacting cylinder 1 is fixed on the base 6, the upper beam 4 is connected to the base 6 through the column 5, the compacting workbench and the iron type jacking seat 7 are connected to the piston rod head of the jacking and compacting cylinder 1, and can rise and fall with the lifting and compacting cylinder 1.

[0049] The lifting guide rod 8 of this embodiment is installed on the compaction workbench and the iron mold lifting seat 7, and can slide relatively in the corresponding guide sleeve of the base 6, and can be lifted and lowered along with the compaction workbench to ensure that the compaction workbench and the iron mold lifting seat 7 are lifted and lowered smoothly.

[0050] In this embodiment, there are four columns 5 , the bottoms of the four columns 5 are fixed on the base 6 , and the upper parts of the columns 5 are connected to the upper beam 4 , so that the base 6 , the columns 5 and the upper beam 4 form an integral frame structure.

[0051] In this embodiment, there are two iron mold conveying rollers 2, which are respectively installed on the columns 5 on both sides; they are used for the iron mold to enter and exit the iron mold sand shooting hole cleaning station.

[0052] The iron mold positioning device 9 of this embodiment is installed at the corresponding position of the iron mold conveying roller 2; it is used to position the iron mold after entering the iron mold sand shooting hole cleaning station; the push rod plate frame trolley entry and exit track 10 is fixed on the column 5, and the sand shooting hole push rod plate 38 and the push rod plate changing mechanism 3 can move in or out of the iron mold sand shooting hole residual sand top hole cleaning station on this track.

[0053] The ejector plate changing mechanism 3 of the present embodiment comprises a drawer-type ejector plate mounting frame trolley track frame 31, a drawer lifting workbench 32, a drawer base 33, a drawer mechanism lifting cylinder 34, an ejector plate mounting frame trolley 35, an ejector plate mounting frame trolley in-and-out moving cylinder 36, a moving cylinder bracket 37 and an ejector plate 38. The drawer mechanism lifting cylinder 34 is fixed on the drawer base 33, and the drawer lifting workbench 32 is installed on the piston rod head of the drawer mechanism lifting cylinder 34, and can be lifted and lowered along with the lifting and lowering of the drawer mechanism lifting cylinder 34; the drawer-type ejector plate mounting frame trolley track frame 31 is fixed on the drawer lifting workbench 32, and can be lifted and lowered along with the lifting and lowering of the drawer lifting workbench 32; each ejector plate mounting frame trolley 35 is placed on the corresponding drawer-type track of the drawer-type ejector plate mounting frame trolley track frame 31, and the moving cylinder bracket 37 is installed on the drawer base 33. In actual use, the drawer base 33 can be selected to be the same base as the top hole machine, and the ejector plate mounting frame trolley in-and-out moving cylinder 36 is fixed on the moving cylinder bracket 37.

[0054] When the push rod plate mounting frame trolley 35 of this embodiment enters the iron mold sand shooting hole cleaning working position, the gap H between the upper plane of the push rod plate 38 and the lower plane of the upper beam 4 of the device is 3-5 mm, see Figure 4 .

[0055] In the present embodiment, there are multiple push rod plate installation frame trolleys 35, and the multiple push rod plate installation frame trolleys 35 are all arranged on the corresponding drawer-type rails of the drawer-type push rod plate installation frame trolley rail frame 31.

[0056] See also Figure 10-Figure 19 The cleaning process of the residual sand cleaning of the iron mold sand shooting hole with multiple replaceable push rod plates in this embodiment is as follows:

[0057] (1) Initial state of the device: the mold has not yet entered the mold sand blasting residual sand cleaning station, and the ejector plate changing mechanism 3 is in the initial state, that is, the drawer lifting workbench 32 is in the lowest position, and each ejector plate mounting frame trolley 35 is placed on the drawer type ejector plate mounting frame trolley track frame 31;

[0058] (2) The iron mold enters the sand-shooting hole cleaning station, and the corresponding ejector plate 38 enters the sand-shooting hole cleaning station: first, the iron mold that needs to be cleaned of the residual sand in the sand-shooting hole is sent to the iron mold conveying roller 2 of the sand-shooting hole residual sand cleaning station of the device through the external iron mold conveying roller, and the iron mold is positioned by the iron mold positioning device 9 so that it is in the sand-shooting hole top hole cleaning working position; at the same time, the drawer-type ejector plate mounting frame trolley track frame 31 equipped with the corresponding ejector plate is raised by the drawer mechanism lifting cylinder 34, so that the upper plane of the drawer-type ejector plate mounting frame trolley track frame 31 and the upper plane of the ejector plate frame trolley in-and-out track 10 are at the same height, and then the ejector plate mounting frame trolley 35 equipped with the corresponding ejector plate 38 is sent from the ejector plate drawer into the iron mold sand-shooting hole cleaning station through the ejector plate mounting frame trolley in-and-out moving cylinder 36, so that the ejector on the ejector plate 38 corresponds to the sand-shooting hole of the iron mold one by one;

[0059] (3) Iron mold sand shooting hole cleaning working state: that is, the lifting and compacting cylinder 1 starts to rise, driving the compacting workbench and the iron mold lifting seat 7 to rise. After hitting the lower plane of the iron mold, it continues to rise, so that the iron mold is separated from the iron mold conveying track and rises together until the residual sand on the sand shooting hole on the upper plane of the iron mold hits the lower plane of the push rod of the push rod plate. Under the action of the rising pressure of the lifting and compacting cylinder 1, the iron mold, the compacting workbench and the iron mold lifting seat 7 continue to rise, driving the iron mold and the push rod plate 38 to continue to rise together, but the gap between the push rod plate and the upper beam is only 3-5 mm. When the upper plane of the push rod plate 38 hits the lower plane of the upper beam 4, the push rod plate stops moving. The lifting and compacting cylinder 1 drives the compacting workbench, the iron mold lifting seat 7 and the iron mold to continue to rise. Under the action of the pressure of the lifting and compacting cylinder 1, the residual sand in the sand shooting hole of the iron mold is gradually pushed out of the sand shooting hole, and finally the top hole cleaning of the residual sand in the sand shooting hole is completed;

[0060] (4) After the residual sand in the sand-shooting holes of the iron mold is cleaned, the iron mold descends to the state on the iron mold conveying roller of the device, that is, the jacking and compacting cylinder 1 descends, driving the compacting workbench and the iron mold jacking seat 7 to descend, and the iron mold descends accordingly, and the iron mold and the ejector plate 38 also descend accordingly. When the wheels of the ejector plate trolley hit the plane on the trolley entry and exit track 10, it stops descending, the ejector on the ejector plate gradually separates from the iron mold, the jacking and compacting cylinder 1 and the iron mold continue to descend, and after the iron mold continues to descend and hits the iron mold conveying roller 2, the iron mold stops descending, and the jacking and compacting cylinder 1 drives the compacting workbench and the iron mold jacking seat 7 to continue to descend to the lowest position, so that the compacting workbench and the iron mold jacking seat 7 are completely separated from the iron mold;

[0061] (5) The state of the iron mold after it is moved out of the device, that is, the iron mold is sent out of the iron mold sand hole cleaning work position of the application document to the iron mold conveying roller outside, thereby completing the cleaning of the residual sand in the iron mold sand hole; at the same time, the push rod plate mounting frame trolley (35) also moves outward with the piston of the push rod plate mounting frame trolley in and out of the moving cylinder (36) to move it out of the iron mold sand hole cleaning work position to the corresponding drawer-type push rod plate mounting frame trolley track frame (31). After moving out to the right position, the drawer mechanism lifting cylinder (34) descends to the lowest position, so that the push rod plate changing mechanism returns to the initial position, completing the entire work of cleaning the sand hole of an iron mold.

[0062] In order to facilitate the replacement of the push rod plate 38, the number of drawers of the drawer-type push rod plate mounting frame trolley track frame 31 in the push rod plate changing mechanism 3 of the present embodiment is the number of required push rod plates plus one drawer position (N+1), N is the number of replaceable push rod plates in the device of the present application, the number of push rod plate mounting frame trolleys 35 is N, and the highest drawer position is in an empty state during normal production without the push rod plate mounting frame trolley 35 placed thereon.

[0063] See also Figure 4-Figure 9 The specific installation steps of the push rod plate 38 in the push rod plate changing mechanism 3 of the present embodiment are as follows: first, the push rod plate installation frame trolley 35 of the push rod plate 38 to be replaced is sent into the position of the iron mold top hole, and then the drawer track that is usually in the highest position and is idle is lowered to the same height as the push rod plate frame trolley in and out track 10 at the iron mold sand hole cleaning station, and then the push rod plate installation frame trolley 35 equipped with the push rod plate is moved out to the uppermost idle drawer. Because the uppermost drawer is open, after it is moved out into place, the push rod plate can be lifted away by a crane; the installation of the new push rod plate is just the opposite. First, the push rod plate is lifted into the push rod by a crane. The push rod plate installation frame trolley 35 is placed in the topmost idle drawer of the drawer-type push rod plate installation frame trolley track frame 31 in the plate changing mechanism 3, and then the track height position of the push rod plate installation frame trolley 35 is consistent with the height position of the push rod plate frame trolley in and out track 10, and the push rod plate installation frame trolley is sent into the iron mold sand shooting hole cleaning station of the device, and then the drawer track plane where the push rod plate is needed to be placed in the push rod plate changing mechanism 3 is raised to the same position as the plane position on the push rod plate frame trolley in and out track 10 of the iron mold sand shooting hole cleaning station, and the push rod plate installation frame trolley 35 is moved out to the push rod plate drawer to complete the installation of the push rod plate.

[0064] The working principle of the residual sand cleaning device for the sand shooting holes of the iron mold in this embodiment is as follows: The casting mold for the iron mold covered with sand generally adopts the method of shooting sand and covering the inner cavity of the formed iron mold to form a thin layer of sand-covered cavity. The sand-covered layer formed by shooting sand on the inner cavity of the iron mold shoots the coated sand in the sand shooting tube during the molding process into the gap between the inner cavity of the iron mold and the model through the sand shooting holes on the iron mold. The sand shooting holes of the iron mold are guaranteed to be unobstructed before each sand shooting. Therefore, the residual sand in the sand shooting holes of the iron mold must be cleaned up every time the iron mold covered with sand casting process is completed. For different casting products, the sand shooting holes of the iron mold are generally different. When the top hole is used to clean the iron mold perforating machine, the iron molds of different casting products need to use a push rod plate with a push rod corresponding to the position of the sand shooting hole of the iron mold. The method of cleaning the residual sand in the sand shooting holes of this embodiment is similar to that of the ordinary sand shooting hole cleaning device, and both adopt the method of cleaning the sand shooting holes by top hole pressure, that is: each sand shooting hole of the iron mold must correspond to a push rod, and under the action of the hydraulic cylinder, each push rod is pressed into the corresponding sand shooting hole of the iron mold, and as the lifting hydraulic cylinder rises, the residual sand column in the sand shooting hole of the iron mold is gradually pushed out of the sand shooting hole of the iron mold, thereby completing the cleaning of the residual sand in the sand shooting hole of the mold. In terms of production efficiency, the production efficiency of the top hole machine is very high. It only takes 10-20 seconds to clean a piece of sand shooting hole of the iron mold. The production efficiency of one top hole machine can be configured with 3-4 sand covering molding machines or even more. Ordinary top hole machines can generally install one top hole plate or shuttle-type top hole machines can install two top hole plates. For the iron-coated sand casting production line of small batch castings, in order to adapt to the simultaneous production of multiple varieties of castings, multiple sand-coated molding machines are often arranged on the production line. There are multiple iron molds running on the production line at the same time, and the positions of the sand shooting holes of various iron molds are different. In this way, it is necessary to arrange multiple sand-shooting hole residual sand cleaning top hole machines on the production line, which is not suitable for the investment, layout, land occupation, efficiency, etc. of the production line.

[0065] The present embodiment of the top hole machine can be equipped with multiple top rod plates to solve the above-mentioned various deficiencies. The principle of the top hole machine of the present embodiment is (see Figure 1-Figure 2 ): By arranging a push rod plate changing mechanism 3 with a lifting function on the side of the top hole machine body, when the top hole machine is performing the top hole cleaning operation of the residual sand in the iron mold sand shooting hole, the required push rod plate is sent into the top hole cleaning operation area of ​​the iron mold sand shooting hole residual sand in the top hole machine, and then the corresponding top hole cleaning operation of the residual sand in the sand shooting hole is performed, thereby achieving that the residual sand cleaning operations of the sand shooting holes of various different iron molds can be completed on one top hole machine.

[0066] The device for cleaning residual sand in the sand shooting holes of the iron mold in this embodiment is equipped with multiple push rod plates for cleaning different sand shooting hole positions. When the iron mold that needs to be cleaned enters the device, the push rod plates corresponding to the positions of the sand shooting holes of the iron mold automatically enter the top hole cleaning working position of the residual sand in the sand shooting holes of the iron mold through the conveying device to perform the cleaning work of the sand shooting holes and the residual sand in the iron mold. After the residual sand in the sand shooting holes is cleaned, the push rod plates can automatically move out of the working position for cleaning the residual sand in the sand shooting holes of the iron mold, thereby realizing the cleaning work of the residual sand in the sand shooting holes of the iron mold with different sand shooting hole positions.

[0067] The biggest difference between this embodiment and the ordinary iron mold sand shooting hole residual sand cleaning device is the addition of components such as the push rod plate changing mechanism 3. The device can complete the entry and exit of different push rod plates into and out of the iron mold sand shooting hole residual sand top hole cleaning station of this application document according to the different iron molds, thereby performing the residual sand cleaning work of the sand shooting holes of different iron molds.

[0068] Through the above description, those skilled in the art can already implement it.

[0069] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the present invention. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A sand cleaning device for iron mold sand-shooting holes with replaceable multiple ejector plates, comprising a lifting and compacting cylinder (1), an upper beam (4), a column (5), a base (6), a compacting workbench, an iron mold lifting seat (7), and a lifting guide rod (8), wherein the lifting and compacting cylinder (1) is fixed on the base (6), the upper beam (4) is connected to the base (6) through the column (5), the compacting workbench and the iron mold lifting seat (7) are connected to the piston rod head of the lifting and compacting cylinder (1), and the lifting guide rod (8) is installed on the compacting workbench and the iron mold lifting seat (7), characterized in that: It also includes an iron-shaped conveying roller (2), a push rod plate changing mechanism (3), an iron-shaped positioning device (9) and a push rod plate frame trolley in-and-out track (10). The iron-shaped conveying roller (2) is connected to the columns (5) on both sides. The iron-shaped positioning device (9) is installed at the corresponding position of the iron-shaped conveying roller (2). The push rod plate frame trolley in-and-out track (10) is fixed on the columns (5). The push rod plate changing mechanism (3) is movably arranged on the push rod plate frame trolley in-and-out track (10). The push rod plate changing mechanism (3) includes a drawer-type push rod plate mounting frame trolley track frame (31), a drawer lifting workbench (32), a drawer base (33), a drawer mechanism lifting cylinder (34), a push rod plate mounting frame trolley (35), a push rod plate mounting frame trolley in-and-out movable cylinder (36), a movable cylinder bracket (37) and a push rod plate (38). The drawer mechanism lifting cylinder (34) is fixed on the drawer base (33). The workbench (32) is mounted on the piston rod head of the drawer mechanism lifting cylinder (34); the drawer-type push rod plate mounting frame trolley track frame (31) is fixed on the drawer lifting workbench (32); the push rod plate mounting frame trolley (35) is arranged on the drawer-type push rod plate mounting frame trolley track frame (31); the movable cylinder bracket (37) is mounted on the drawer base (33); the push rod plate mounting frame trolley in and out of the movable cylinder (36) is fixed on the movable cylinder bracket (37); the gap between the upper plane of the push rod plate (38) and the lower plane of the upper beam (4) is 3-5 mm; the push rod plate mounting frame trolley (35) is a plurality of push rod plate mounting frame trolleys (35), and the plurality of push rod plate mounting frame trolleys (35) are all arranged on the corresponding drawer-type tracks of the drawer-type push rod plate mounting frame trolley track frame (31); the number of drawers of the drawer-type push rod plate mounting frame trolley track frame (31) in the push rod plate changing mechanism (3) is equal to the number of required push rod plates (38) plus one more drawer position.

2. The iron mold sand-shooting hole residual sand cleaning device with replaceable multiple push rod plates according to claim 1 is characterized in that: There are four upright posts (5), the bottoms of the four upright posts (5) are fixed on the base (6), and the upper parts of the upright posts (5) are connected to the upper beam (4).

3. The iron mold sand-shooting hole residual sand cleaning device with replaceable multiple push rod plates according to claim 1 is characterized in that: There are two iron-shaped conveying rollers (2), and the two iron-shaped conveying rollers (2) are respectively installed on the columns (5) on both sides.

4. The iron mold sand-shooting hole residual sand cleaning device with replaceable multiple push rod plates according to claim 1 is characterized in that: The lifting guide rod (8) slides relatively in a corresponding guide sleeve of the base (6).

5. A method for cleaning residual sand from a sand-shooting hole of an iron mold with replaceable multiple push rod plates, using the device for cleaning residual sand from a sand-shooting hole of an iron mold with replaceable multiple push rod plates as claimed in any one of claims 1 to 4, characterized in that: Here are the steps: (1) Initial state of the device: the mold has not yet entered the mold sand blasting residual sand cleaning station, and the ejector plate changing mechanism (3) is in the initial state, that is, the drawer lifting worktable (32) is in the lowest position, and each ejector plate mounting frame trolley (35) is placed on the drawer type ejector plate mounting frame trolley track frame (31); (2) The iron mold enters the sand-shooting hole cleaning station, and the corresponding ejector plate (38) enters the sand-shooting hole cleaning station: first, the iron mold to be cleaned of the residual sand in the sand-shooting hole is sent to the iron mold conveying roller (2) of the sand-shooting hole residual sand cleaning station of the device through the external iron mold conveying roller, and the iron mold is positioned by the iron mold positioning device (9) so that it is in the sand-shooting hole top hole cleaning working position; at the same time, the drawer-type ejector plate mounting frame trolley track frame (3 1) The drawer mechanism lifting cylinder (34) is raised so that the upper plane of the drawer type ejector plate mounting frame trolley track frame (31) and the upper plane of the ejector plate frame trolley in-and-out track (10) are at the same height, and then the ejector plate mounting frame trolley (35) equipped with the corresponding ejector plate (38) is sent from the ejector plate drawer to the iron mold sand shooting hole cleaning station through the ejector plate mounting frame trolley in-and-out moving cylinder (36) so that the ejector on the ejector plate (38) corresponds to the iron mold sand shooting hole one by one; (3) Iron mold sand shooting hole cleaning working state: that is, the lifting and compacting cylinder (1) starts to rise, driving the compacting workbench and the iron mold lifting seat (7) to rise, and after hitting the lower plane of the iron mold, it continues to rise, so that the iron mold is separated from the iron mold conveying track, and rises together until the residual sand on the sand shooting hole on the upper plane of the iron mold hits the lower plane of the push rod of the push rod plate. Under the action of the rising pressure of the lifting and compacting cylinder (1), the iron mold, the compacting workbench and the iron mold lifting seat (7) continue to rise, driving the iron mold and the push rod plate (38) to continue to rise together. When the upper plane of the push rod plate (38) hits the lower plane of the upper beam (4), the push rod plate (38) stops moving, and the lifting and compacting cylinder (1) drives the compacting workbench, the iron mold lifting seat (7) and the iron mold to continue to rise. Under the action of the pressure of the lifting and compacting cylinder (1), the residual sand in the sand shooting hole of the iron mold is gradually pushed out of the sand shooting hole, and finally the residual sand top hole cleaning of the sand shooting hole is completed; (4) After the residual sand in the sand-shooting holes of the iron mold is cleaned, the iron mold descends to the state on the iron mold conveying roller of the device, that is, the jacking and compacting cylinder (1) descends, driving the compacting workbench and the iron mold jacking seat (7) to descend, and the iron mold descends accordingly, and the iron mold and the ejector plate (38) also descend accordingly. When the wheels of the ejector plate trolley hit the upper plane of the trolley entry and exit track (10), they no longer descend, and the ejector on the ejector plate gradually separates from the iron mold, and the jacking and compacting cylinder (1) and the iron mold continue to descend. After the iron mold continues to descend and hits the iron mold conveying roller (2), the iron mold no longer descends, and the jacking and compacting cylinder (1) drives the compacting workbench and the iron mold jacking seat (7) to continue to descend to the lowest position, so that the compacting workbench and the iron mold jacking seat (7) are completely separated from the iron mold; (5) The state of the iron mold after it is moved out of the device, that is, the iron mold is sent out of the iron mold sand hole cleaning work position of the application document to the iron mold conveying roller outside, thereby completing the cleaning of the residual sand in the iron mold sand hole; at the same time, the push rod plate mounting frame trolley (35) also moves outward with the piston of the push rod plate mounting frame trolley in and out of the moving cylinder (36) to move it out of the iron mold sand hole cleaning work position to the corresponding drawer-type push rod plate mounting frame trolley track frame (31). After moving out to the right position, the drawer mechanism lifting cylinder (34) descends to the lowest position, so that the push rod plate changing mechanism returns to the initial position, completing the entire work of cleaning the sand hole of an iron mold.

6. The method for cleaning residual sand in the sand-shooting hole of an iron mold with replaceable multiple push rod plates according to claim 5, characterized in that: The specific installation steps of the push rod plate (38) in the push rod plate replacement mechanism (3) are as follows: first, the push rod plate installation frame trolley (35) of the push rod plate (38) to be replaced is sent to the position of the top hole of the iron mold, and then the drawer track that is usually in the highest position and is idle is lowered to the same height as the push rod plate frame trolley in and out track (10) at the iron mold sand hole cleaning station, and then the push rod plate installation frame trolley (35) equipped with the push rod plate is moved out to the uppermost idle drawer. Since the uppermost drawer is open, after it is moved out, the push rod plate can be lifted away by a crane; The installation of the new ejector plate is just the opposite. First, the ejector plate is hoisted into the ejector plate installation frame trolley (35) of the top idle drawer of the drawer-type ejector plate installation frame trolley track frame (31) in the ejector plate plate changing mechanism (3) by a traveling crane. Then, the track height position of the ejector plate installation frame trolley (35) is consistent with the height position of the ejector plate frame trolley in and out track (10). The ejector plate installation frame trolley is sent into the iron mold sand hole cleaning station of the device. Then, the upper plane of the drawer track where the ejector plate is to be placed in the ejector plate changing mechanism (3) is raised to the same position as the upper plane position of the ejector plate frame trolley in and out track (10) of the iron mold sand hole cleaning station. The ejector plate installation frame trolley (35) is moved out to the ejector plate drawer to complete the installation of the ejector plate.

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