CN219052891U - Automatic filter screen separating and forming mechanism of aluminum alloy hub gravity casting system - Google Patents
Automatic filter screen separating and forming mechanism of aluminum alloy hub gravity casting system Download PDFInfo
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- CN219052891U CN219052891U CN202223235869.3U CN202223235869U CN219052891U CN 219052891 U CN219052891 U CN 219052891U CN 202223235869 U CN202223235869 U CN 202223235869U CN 219052891 U CN219052891 U CN 219052891U
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Abstract
The utility model discloses an automatic separating and forming mechanism of a filter screen of an aluminum alloy hub gravity casting system, which comprises a machine body, wherein the machine body is provided with a separating position, a forming position and a rotating position, and a screen support is placed on the forming position in advance; the feeding mechanism comprises a material containing cylinder which is arranged at the separation position and is internally provided with a containing cavity and a lifting driving mechanism which is arranged on the material containing cylinder; the motion mechanism is arranged at the rotating position and comprises a rotation mechanism and a lifting mechanism, and one side of the top of the lifting mechanism is provided with a transverse arm extending transversely; the filter screen separating mechanism is arranged at the bottom of the tail end of the cross arm and can vertically do lifting motion; the filter screen forming mechanism is arranged at the bottom of the tail end of the cross arm and opposite to the separating mechanism, and can also vertically move up and down. The automatic separation and the stamping forming of the filter screen are realized, the labor cost is reduced, and the production efficiency is greatly improved.
Description
Technical Field
The utility model belongs to the technical field of aluminum alloy hub gravity casting equipment, and particularly relates to an automatic filter screen separating and forming mechanism of an aluminum alloy hub gravity casting system.
Background
The hub is an important exterior part and safety part of an automobile. When the aluminum liquid is poured, a filter screen is needed to filter the aluminum liquid. At present, in the gravity casting of the aluminum alloy of the automobile hub, the filter screen used in the casting process is shaped, placed in the funnel and taken out from the funnel in a manual mode, and specifically, a stack of filter screens stacked together are firstly split one by one, and then the filter screens are made into a funnel shape by using an awl and placed on a gravity casting table. That is to say, in the prior art, a series of operations such as separation, forming and the like of the filter screen in the gravity casting process of the hub are all manually operated. This approach has the problems of large worker workload and low efficiency. Therefore, it is necessary to develop a mechanism for automatically separating and forming the filter screen to solve the above-mentioned problems.
Disclosure of Invention
In view of at least one of the above technical problems, the present utility model aims to: an automatic separating and forming mechanism for a filter screen of an aluminum alloy hub gravity casting system is provided.
The technical scheme of the utility model is as follows:
the utility model aims to provide an automatic filter screen separating and forming mechanism of an aluminum alloy hub gravity casting system, which comprises the following components:
the machine body is provided with a separation position for separating the sheet-shaped filter screen, a forming position for forming the funnel-shaped filter screen and a rotating position arranged between the separation position and the forming position, wherein a screen support is placed on the forming position in advance;
the feeding mechanism comprises a containing material cylinder with an axis arranged at the separation position vertically and provided with a containing cavity therein, and a lifting driving mechanism which is arranged on the containing material cylinder and can move along the axis direction of the containing material cylinder so as to convey a sheet filter screen to be formed to the top of the containing material cylinder;
the motion mechanism is arranged at the rotation position and comprises a rotation mechanism which moves horizontally and circumferentially around the rotation position and a lifting mechanism which is arranged on the rotation mechanism and can vertically lift, and a transverse arm which transversely extends is arranged at one side of the top of the lifting mechanism;
the filter screen separating mechanism is arranged at the bottom of the tail end of the cross arm and can vertically do lifting motion;
the filter screen forming mechanism is also arranged at the bottom of the tail end of the cross arm and opposite to the separating mechanism, and can also vertically move up and down;
the filter screen separating mechanism and the filter screen forming mechanism are driven by the rotating mechanism to be switched over the separating position and the forming position.
Compared with the prior art, the utility model has the advantages that:
according to the automatic separating and forming mechanism for the filter screen of the aluminum alloy hub gravity casting system, the feeding mechanism is adopted to realize automatic feeding of the filter screen, the filter screen separating mechanism is adopted to separate and transfer the stacked sheet-shaped filter screens to the forming position, the filter screen forming mechanism is utilized to punch the filter screen into a required funnel shape, and the formed filter screen is transferred to the next station by the mechanical arm, so that the automatic separation, stamping forming and automatic feeding and discharging of the filter screen are realized, the problems of low efficiency and high labor cost caused by a series of manual operation such as the separation and forming of the filter screen in the prior art are solved, the labor cost is reduced, and the production efficiency is greatly improved.
Drawings
The utility model is further described below with reference to the accompanying drawings and examples:
FIG. 1 is a schematic perspective view of a screen auto-separating and forming mechanism of an aluminum alloy hub gravity casting system according to an embodiment of the utility model;
FIG. 2 is a schematic perspective view of a motion mechanism, a screen separation mechanism and a screen forming mechanism of an automatic screen separation forming mechanism of an aluminum alloy hub gravity casting system according to an embodiment of the present utility model;
FIG. 3 is a schematic structural view of a feeding mechanism of an automatic screen separating and forming mechanism of an aluminum alloy hub gravity casting system according to an embodiment of the utility model;
FIG. 4 is a schematic view of the structure of FIG. 3 with the cartridge omitted;
FIG. 5 is a schematic view of the cartridge of FIG. 3;
FIG. 6 is a schematic diagram of the structure of a positioning disk in a screen forming mechanism of an automatic screen separating and forming mechanism of an aluminum alloy hub gravity casting system according to an embodiment of the present utility model;
FIG. 7 is a schematic view of the structure of the working table of the body of the automatic screen separating and forming mechanism of the gravity casting system of the aluminum alloy hub according to the embodiment of the utility model;
fig. 8 is a schematic structural view of a lifting mechanism of a forming position of an automatic screen separating and forming mechanism of an aluminum alloy hub gravity casting system according to an embodiment of the utility model.
Wherein: 1. a body; 10. a work table; 101. a first through hole; 102. a second through hole; 1021. an avoidance port; 11. separating positions; 12. forming position; 13. rotating the position; 2. a movement mechanism; 20. a cross arm; 21. a rotation mechanism; 211. a rotating electric machine; 212. a turntable; 22. a lifting mechanism; 3. a filter screen separating mechanism; 31. a needle type suction cup; 32. a first vertical drive mechanism; 4. a filter screen forming mechanism; 41. a punch mechanism; 411. a plunger; 412. positioning a disc; 4121. avoiding the notch; 4122. a connection hole; 413. a buffer member; 42. a second vertical drive mechanism; 5. a feeding mechanism; 50. a screen plate; 51. a material accommodating cylinder; 511. an avoidance groove; 52. a lifting driving mechanism; 521. a driving motor; 522. a screw rod; 523. a screw rod sliding block; 524. a guide rod; 6. jacking the air cylinder; 7. a net support; 71. punching; 8. a first detection camera; 9. and a second detection camera.
Detailed Description
The objects, technical solutions and advantages of the present utility model will become more apparent by the following detailed description of the present utility model with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.
Examples:
referring to fig. 1 to 8, an automatic separating and forming mechanism for a filter screen of an aluminum alloy hub gravity casting system according to an embodiment of the present utility model includes a machine body 1, a feeding mechanism 5, a moving mechanism 2, a filter screen separating mechanism 3, a filter screen forming mechanism 4 and a filter screen grabbing mechanism. Specifically, the machine body 1 is provided with a separating position 11 for separating the sheet-shaped filter screen, a forming position 12 for forming the funnel-shaped filter screen and a rotating position 13 arranged between the separating position 11 and the forming position 12, and the net support 7 is placed on the forming position 12 in advance. The feeding mechanism 5 includes a receiving cylinder 51 having an accommodating cavity therein and provided with an axis line vertically at the separating position 11, and a lifting drive mechanism 52 provided on the receiving cylinder 51 and movable in an axis line direction of the receiving cylinder 51 to convey a sheet filter screen to be formed to a top of the receiving cylinder 51. The motion mechanism 2 is arranged at the rotation position 13 and comprises a rotation mechanism 21 which moves horizontally and circumferentially around the rotation position 13 and a lifting mechanism 22 which is arranged on the rotation mechanism 21 and can vertically lift, and a transverse arm 20 which transversely extends is arranged at one side of the top of the lifting mechanism 22. The filter screen separating mechanism 3 is arranged at the bottom of the tail end of the cross arm 20 and can vertically move up and down, and is used for sucking the sheet-shaped filter screens provided by the feeding mechanism 5 one by one and moving the sheet-shaped filter screens to the forming position 12 for punching into a funnel shape. The filter screen forming mechanism 4 is also arranged at the bottom of the tail end of the cross arm 20 and is opposite to the separating mechanism, namely front-back opposite equipment as shown in fig. 2, and the filter screen forming mechanism 4 can also vertically move up and down. The screen separating mechanism 3 and the screen forming mechanism 4 are reciprocally switched over the separating position 11 and the forming position 12 by the driving of the rotating mechanism 21. The formed filter screen at the forming station 12 is taken out together with the screen support 7 by the mechanical arm and transferred to the next station, i.e. the gravity casting station, that is to say the transfer of the formed filter screen to the gravity casting station is performed by the mechanical arm. It should be noted that, the mechanical arm in the embodiment of the present utility model is a conventional mechanical arm with multiple degrees of freedom, such as six degrees of freedom, used in industrial production in the existing market, and the specific structure is not described and limited in detail, which is not an innovation point of the present utility model. After the casting, the net holder 7 is also taken out by the robot arm. In summary, the automatic separating and forming mechanism for the filter screen of the gravity casting system for the aluminum alloy hub provided by the embodiment of the utility model adopts the feeding mechanism 5 to realize automatic feeding of the filter screen, adopts the filter screen separating mechanism 3 to separate and transfer the stacked sheet-shaped filter screens to the forming position 12, then utilizes the filter screen forming mechanism 4 to punch the filter screen into a required funnel shape, and utilizes the mechanical arm to transfer the formed filter screen to the next station, namely the gravity casting table, thereby realizing automatic separation and punching forming of the filter screen and automatic feeding and discharging, reducing the procedures of manually folding the filter screen and separating the filter screen, solving the problems of low efficiency and safety existing in the prior art due to manual operation of a series of operations such as separating and forming of the filter screen, reducing labor cost, reducing the safety problem existing in manpower and greatly improving the production efficiency.
According to some preferred embodiments of the present utility model, as shown in fig. 5, the sidewall of the receiving cylinder 51 is provided with a through recess 511 extending in the axial direction thereof, and as shown in fig. 4, the driving end of the elevation driving mechanism 52 is connected with a screen plate 50 for receiving a sheet-shaped filter screen to be formed. The mesh plate 50 passes through the avoiding groove 511 and enters the accommodating cavity, and can slide in the avoiding groove 511 under the driving of the lifting driving mechanism 52. As shown in fig. 4, the lift driving mechanism 52 includes a driving motor 521, a screw 522 connected to the driving motor 521 and having an axis parallel to the axis of the accommodating cylinder 51, and a screw slider 523 screwed to the screw 522, and the screen 50 is fixed to the screw slider 523. The axis of the driving motor 521 is arranged vertically, the axis of the screw rod 522 is also arranged vertically, and the bottom end is meshed with the driving motor 521 for transmission. The screen 50 is a circular plate with a hollow in the middle and matched with the shape of the filter screen, and is used for supporting a stack of filter screens to be formed, which are stacked together. In advance, the operator puts a stack of filter screens into the accommodating cylinder 51 and places the stack of filter screens on the screen 50, the screen 50 is initially located at the bottom of the accommodating cylinder 51, the filter screen separating mechanism 3 descends into the accommodating cylinder 51 to grasp one filter screen, and the filter screen separating mechanism 3 is difficult to grasp the filter screen along with gradual descending of the height of the filter screen, so that the screen 50 needs to be driven to ascend by the lifting driving mechanism 52 to lift the filter screen to a position where the filter screen separating mechanism 3 can grasp. The lifting of the screen 50 is realized by adopting a screw rod 522 mechanism, the structure is simpler, and the lifting is reliable and stable. It is further preferred that the lift drive mechanism 52 also include a guide bar 524 having an axis parallel to the axis of the lead screw 522. As shown in fig. 3 and 4, two guide rods 524 parallel to the screw 522 are further provided at both sides of the screw 522, the middle part of the screw slider 523 is screw-fitted on the screw 522, and at the same time, both sides of the screw slider 523 are also respectively slide-fitted with the two guide rods 524. By the arrangement of the guide rod 524, the lifting of the screw slider 523 can be guided and restrained, and the straightness of the lifting motion is ensured.
According to some preferred embodiments of the present utility model, in order to facilitate the separation of the stacked filter screens without damaging the filter screens, the filter screen separating mechanism 3 preferably adopts a needle type suction cup separating mechanism in the prior art, that is, the filter screen separating mechanism 3 includes a needle type suction cup 31 and a first vertical driving mechanism 32, the first vertical driving mechanism 32 is preferably a cylinder, the needle type suction cup 31 is mounted at the bottom of the first vertical driving mechanism 32, that is, a telescopic rod of the cylinder, and the needle type suction cup 31 is driven by the telescopic rod of the cylinder to extend into or withdraw from a top opening of the receiving cylinder 51 to grasp the filter screen for realizing the separation of the filter screens. The grabbing of the filter screen is realized in a suction mode, and the deformation damage of the filter screen caused by grabbing the outer ring of the filter screen can be avoided. Further preferably, a first detecting camera 8 facing the filter screen separating mechanism 3, such as a CCD industrial camera or a CMOS industrial camera, may be disposed on one side of the machine body 1 at the separating position 11 through an inverted L-shaped mounting frame, and the industrial camera shoots the number of the filter screens sucked by the needle type suction cup 31, and the industrial camera invokes a matched number recognition algorithm to calculate the number of the grabbing filter screens, so as to avoid that the number of the filter screens grabbed by the needle type suction cup 31 at one time is not one, and if the number of the filter screens is not one, the filter screens are thrown into the collection box directly, and then grabbed again. Alternatively, the sensor may be omitted, and the suction force of the needle sucker 31 may be directly adjusted, specifically, the suction force of the needle sucker 31 may only grasp one filter screen, and when the number of filter screens exceeds one, such as two or three, etc., the lower filter screen may automatically drop due to insufficient suction force. Preferably, a buffer mechanism such as a spring may also be provided between the drive end of the first vertical drive mechanism 32 and the needle suction cup 31.
According to some preferred embodiments of the present utility model, as shown in fig. 2, the screen forming mechanism 4 includes a punch mechanism 41 and a second vertical driving mechanism 42 (also in the embodiment of the present utility model, an air cylinder) for driving the punch mechanism 41 to perform lifting movement, where the axis of the telescopic rod of the second vertical driving mechanism 42 is parallel to the axis of the telescopic rod of the first vertical driving mechanism 32, and the punch mechanism 41 is disposed at the bottom end of the second vertical driving mechanism 42. The punch mechanism 41 comprises a punch rod 411 installed at the bottom end of the second vertical driving mechanism 42 and extending vertically, a positioning disc 412 installed at the bottom of the punch rod, and a buffer piece 413, such as a spring, sleeved on the punch rod 411, one end of the buffer piece is abutted to the second vertical driving mechanism 42, the other end of the buffer piece is abutted to the top surface of the positioning disc 412, at least part of the bottom end of the punch rod 411 extends below the bottom end surface of the positioning disc 412 to form a punching part, the size of the punching part is consistent with the size and shape of the middle hole of the net support 7, the punching part is preferably in a reverse taper design so as to punch the filter screen into a required funnel shape, the middle part of the filter screen horizontally placed on the net support 7 is punched downwards through the punching part to form the funnel shape, the periphery of the filter screen is pressed and positioned through the positioning disc 412 so as to punch the middle of the filter screen of the punching part, and the punching force of the punch rod 411 is buffered through the buffer piece 413, and the filter screen breakage caused by overlarge punching force is avoided. It should be noted that a second detection camera 9, such as a CCD industrial camera or a CMOS industrial camera, is added beside or directly above the molding position 12 (preferably directly above the molding position 12 in fig. 1) to detect whether there is a residual filter screen on the screen tray 7 on the molding position 12. The second inspection camera 9 is not actually shown in fig. 1, but only the mounting position of the second inspection camera 9 is shown, whereas in fig. 1 the second inspection camera 9 is facing away from the reader, and is hidden by a vertical mounting plate for fixedly mounting the second inspection camera 9. Specifically, before the punching press is accomplished to the filter screen, supporting second detects the camera and shoots the image that holds in the palm 7, invokes built-in foreign matter detection algorithm, detects whether there is remaining residual filter screen on the net holds in the palm 7, if detect that there is the foreign matter then report to the police and indicate that manual intervention is cleared up remaining filter screen, avoids producing harmful effects to follow-up wheel hub aluminium liquid casting because of remaining filter screen.
In the embodiment of the present utility model, a vertical mounting plate (not shown) may be disposed at the bottom of the cross arm 20, and as shown in fig. 2, the front and rear surfaces of the mounting plate are respectively provided with the first vertical driving mechanism 32 and the second vertical driving mechanism 42. Alternatively, the top of the first and second vertical driving mechanisms 32 and 42 may be directly fixed to the bottom end of the cross arm 20.
According to some preferred embodiments of the present utility model, as shown in fig. 2 and 6, an end of the positioning disc 412, which is close to the needle-shaped suction disc 31, is provided with a recess 4121 recessed radially inwards, and the needle-shaped suction disc 31 is in clearance fit in the recess 4121. By adopting the design, the filter screen separating mechanism 3 and the filter screen forming mechanism 4 can be more compact, and on the other hand, the arrangement of the avoiding notch 4121 can also form the guide for lifting movement of the filter screen separating mechanism and the filter screen forming mechanism. As shown in fig. 6, the positioning disk 412 has a connecting hole 4122 in the middle for the punch portion of the punch rod to pass through and extend downward.
According to some preferred embodiments of the utility model, as shown in fig. 8, in order to facilitate the grabbing of the screen into the casting mould after the press forming of the forming station, a jacking cylinder 6 is provided at the forming station 12, and the screen holder 7 is placed above the jacking axis of the jacking cylinder 6. Before punching, the jacking cylinder 6 is ejected, after the filter screen is placed on the screen support 7, the jacking cylinder 6 descends to level the upper surface of the screen support 7 with the working table, then the punch rod 411 is pressed down, punching and forming of the filter screen are achieved through the punching hole 71 in the middle of the screen support 7, the filter screen is in a funnel shape, after punching is completed, the jacking cylinder 6 ascends to enable the screen support 7 to be higher than the working table, and then the clamping jaw mechanism can easily take out the screen support 7 and the filter screen from the forming position 12 together.
According to some preferred embodiments of the present utility model, as shown in fig. 7, the top surface of the machine body 1 has a working table, two through holes are spaced apart on the working table, one through hole is implemented as an 11 separating position, the other through hole is implemented as a forming position 12, and two avoidance openings 1021 which are opposite left and right and extend radially outwards for the screen grabbing mechanism to extend into the grabbing net support are formed on the inner wall of the through hole implemented as the forming position 12, that is, the through hole on the right side as shown in fig. 7. That is, the jacking cylinder 6 may not be provided, and after the screen is press-molded, the claw mechanism directly extends into the through hole of the molding position 12 and the net support together with the screen is taken out of the molding position 12 through the escape hole 1021.
It is to be understood that the above-described embodiments of the present utility model are merely illustrative of or explanation of the principles of the present utility model and are in no way limiting of the utility model. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present utility model should be included in the scope of the present utility model. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.
Claims (9)
1. An automatic filter screen separating and forming mechanism of an aluminum alloy hub gravity casting system is characterized by comprising:
the machine body is provided with a separation position for separating the sheet-shaped filter screen, a forming position for forming the funnel-shaped filter screen and a rotating position arranged between the separation position and the forming position, wherein a screen support is placed on the forming position in advance;
the feeding mechanism comprises a containing material cylinder with an axis arranged at the separation position vertically and provided with a containing cavity therein, and a lifting driving mechanism which is arranged on the containing material cylinder and can move along the axis direction of the containing material cylinder so as to convey a sheet filter screen to be formed to the top of the containing material cylinder;
the motion mechanism is arranged at the rotation position and comprises a rotation mechanism which moves horizontally and circumferentially around the rotation position and a lifting mechanism which is arranged on the rotation mechanism and can vertically lift, and a transverse arm which transversely extends is arranged at one side of the top of the lifting mechanism;
the filter screen separating mechanism is arranged at the bottom of the tail end of the cross arm and can vertically do lifting motion;
the filter screen forming mechanism is also arranged at the bottom of the tail end of the cross arm and opposite to the separating mechanism, and can also vertically move up and down;
the filter screen separating mechanism and the filter screen forming mechanism are driven by the rotating mechanism to be switched over the separating position and the forming position.
2. The automatic separating and forming mechanism for a filter screen of an aluminum alloy hub gravity casting system according to claim 1, wherein the side wall of the material accommodating cylinder is provided with a through avoidance groove extending along the axial direction of the material accommodating cylinder, the driving end of the lifting driving mechanism is connected with a screen plate for supporting a sheet filter screen to be formed, and the screen plate penetrates through the avoidance groove to enter the accommodating cavity and can slide in the avoidance groove under the driving of the lifting driving mechanism.
3. The automatic filter screen separating and forming mechanism of the aluminum alloy hub gravity casting system according to claim 2, wherein the lifting driving mechanism comprises a driving motor, a screw rod connected with the driving motor and having an axis parallel to the axis of the material accommodating cylinder, and a screw rod sliding block connected with the screw rod in a threaded manner, and the screen plate is fixed on the screw rod sliding block.
4. The automatic screen separating and forming mechanism of the aluminum alloy hub gravity casting system according to claim 3, wherein the lifting driving mechanism further comprises a guide rod with an axis parallel to the axis of the screw rod.
5. The automatic filter screen separating and forming mechanism of an aluminum alloy hub gravity casting system according to claim 1, wherein the filter screen separating mechanism comprises a needle type sucker and a first vertical driving mechanism for driving the needle type sucker to do lifting motion, and the needle type sucker is arranged at the bottom end of the first vertical driving mechanism.
6. The automatic filter screen separating and forming mechanism of the aluminum alloy hub gravity casting system according to claim 5, wherein the filter screen forming mechanism comprises a punch mechanism and a second vertical driving mechanism for driving the punch mechanism to do lifting movement, and the punch mechanism is arranged at the bottom end of the second vertical driving mechanism;
the punch mechanism comprises a punch rod which is arranged at the bottom end of the second vertical driving mechanism and extends vertically, a positioning disc which is arranged at the bottom of the punch rod, and a buffer piece which is sleeved on the punch rod, one end of the buffer piece is abutted to the second vertical driving mechanism, the other end of the buffer piece is abutted to the top surface of the positioning disc, and the bottom end of the punch rod at least partially extends below the bottom end surface of the positioning disc to form a punching part.
7. The automatic separating and forming mechanism for a filter screen of an aluminum alloy hub gravity casting system according to claim 6, wherein one end of the positioning disc, which is close to the needle type sucker, is provided with a radial inward concave avoidance notch, and the needle type sucker is in clearance fit in the avoidance notch.
8. The automatic separating and forming mechanism for a filter screen of an aluminum alloy hub gravity casting system according to claim 1, wherein the top surface of the machine body is provided with a workbench surface, two through holes are spaced on the workbench surface, one through hole is implemented as a separating position, the other through hole is implemented as a forming position, and two opposite avoidance openings which extend outwards in radial directions are formed in the inner wall of the through hole implemented as the forming position, so that the filter screen grabbing mechanism stretches into and grabs the screen support.
9. The automatic filter screen separating and forming mechanism of the aluminum alloy hub gravity casting system according to claim 1, wherein a first detecting camera for detecting the number of the filter screens grabbed by the filter screen separating mechanism is further arranged on the machine body and located on one side of the separating position; and/or
And a second detection camera used for detecting whether a filter screen is remained on the net support or not is further arranged on one side of the machine body and right above the forming position.
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CN202223235869.3U CN219052891U (en) | 2022-12-02 | 2022-12-02 | Automatic filter screen separating and forming mechanism of aluminum alloy hub gravity casting system |
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CN202223235869.3U CN219052891U (en) | 2022-12-02 | 2022-12-02 | Automatic filter screen separating and forming mechanism of aluminum alloy hub gravity casting system |
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CN202223235869.3U Active CN219052891U (en) | 2022-12-02 | 2022-12-02 | Automatic filter screen separating and forming mechanism of aluminum alloy hub gravity casting system |
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2022
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