Automatic filling device for molding machine and control method thereof

Abstract

The present invention discloses an automatic filling device for a molding machine and a control method thereof, comprising: a mounting bracket, a transmission component, a lower material barrel, an upper material barrel, a mold feeding box and a control component; one end of the transmission component is connected to the mounting bracket, and the other end thereof is slidably connected to the lower material barrel; the upper material barrel is fixedly connected to the mounting bracket; the mold feeding box is fixedly arranged at the bottom of the mounting bracket; the control component is electrically connected to the transmission component, the lower material barrel and the upper material barrel respectively, and the discharge amount is controlled by the upper solenoid valve at the bottom of the upper material barrel, and the transmission component is controlled to drive the lower material barrel to reciprocate in the horizontal and vertical directions, and the weight information of the material received by the lower material barrel is obtained and the lower solenoid valve at the bottom is used to control the discharge of the material to the mold feeding box. The type identification, automatic feedback and precise quality control of the material from the upper material barrel to the mold feeding box are realized through the transmission component and the lower material barrel.

Description

Technical Field

[0001] The invention relates to the technical field of powder metallurgy forming, and in particular to an automatic filling device for a forming machine and a control method thereof. Background Art

[0002] Many production processes involve powder pressing and have strict requirements on the size of the pressed blocks. In the traditional metallurgical industry, powder filling is mostly done by manual weighing and manual filling, and the filling funnel is often independent of the equipment.

[0003] Manual weighing and filling have the following problems: manual weighing can easily lead to the size of the pressed blocks not meeting the standards; the labor cost is high and the efficiency is low during large-scale pressing. It is urgent and necessary to find a mechanism that can accurately fill the powder according to self-feedback of different types of powders. Summary of the invention

[0004] The purpose of the embodiment of the present invention is to provide an automatic filling device for a molding machine and a control method thereof, which realizes the accurate transmission of materials from the upper barrel to the mold feeding box through a transmission component and a lower barrel, and realizes automatic identification and accurate feeding of various types of materials.

[0005] In order to solve the above technical problems, a first aspect of an embodiment of the present invention provides an automatic filling device for a molding machine, comprising an installation bracket, a transmission assembly, a lower material barrel, an upper material barrel, a mold feeding box and a control assembly;

[0006] One end of the transmission assembly is connected to the mounting bracket, and the other end thereof is slidably connected to the discharge barrel;

[0007] The loading bucket is fixedly connected to the mounting bracket;

[0008] The mold feeding box is fixedly arranged at the bottom of the mounting bracket;

[0009] The control component is electrically connected to the transmission component, the lower material barrel and the upper material barrel respectively, and controls the discharge amount of the upper material barrel through the upper solenoid valve at the bottom, controls the transmission component to drive the lower material barrel to reciprocate in the horizontal and vertical directions, obtains the weight information of the material received by the lower material barrel and controls it to discharge the material to the mold feeding box through the lower solenoid valve at the bottom.

[0010] Furthermore, a position sensor electrically connected to the control component is provided at the edge of the loading barrel;

[0011] The position sensor obtains the position information of the discharge barrel and sends it to the control component.

[0012] Furthermore, the material discharge barrel is provided with a weight sensor electrically connected to the control component;

[0013] The weight sensor obtains the weight information of the material received in the material discharge barrel and sends it to the control component.

[0014] Furthermore, the transmission assembly includes: a stepper motor, a threaded rod, a guide rail, a transverse slider, a connecting plate, a longitudinal slider, and a bidirectional cylinder;

[0015] The guide rail is fixedly connected to the mounting bracket;

[0016] The stepper motor is fixed to the side wall of the mounting bracket;

[0017] The threaded rod is arranged horizontally, and one end thereof is fixedly connected to the output end of the stepping motor;

[0018] The transverse slider is rotatably connected to the threaded rod;

[0019] The connecting plate is arranged longitudinally, one side of which is fixedly connected to the side wall of the transverse slider, and the top of the other side is fixedly connected to the base of the bidirectional cylinder;

[0020] One end of the bidirectional cylinder slides along the guide rail, and the other end is connected to the longitudinal slider via a connecting rod;

[0021] The side of the longitudinal sliding block away from the connecting plate is fixedly connected to the side wall of the lower material barrel;

[0022] When the stepping motor drives the threaded rod to rotate, it drives the transverse slider to move back and forth along the axial direction of the threaded rod, and the bidirectional cylinder moves synchronously along the guide rail when the transverse slider moves along the threaded rod;

[0023] The bidirectional cylinder is electrically connected to the control component, and drives the discharge barrel to reciprocate in the vertical direction through the longitudinal slider under the control of the control component.

[0024] Furthermore, a longitudinally arranged sliding groove is provided on one side of the connecting plate facing the longitudinal sliding block;

[0025] The longitudinal sliding block is driven by the bidirectional cylinder and is slidably connected to the connecting plate through the sliding groove.

[0026] Furthermore, a limiting plate is provided at one end of the threaded rod away from the stepping motor.

[0027] Furthermore, handles are provided on opposite side walls of the mold feeding box.

[0028] Furthermore, a plurality of U-shaped positioning grooves are provided on one side of the longitudinal sliding block facing the discharge barrel;

[0029] A positioning piece corresponding to the U-shaped positioning groove is provided on one side of the lower material barrel facing the longitudinal sliding block;

[0030] The U-shaped positioning groove and the positioning piece are respectively provided with positioning through holes in the horizontal direction;

[0031] The longitudinal sliding block and the lower material bucket are fixedly connected by bolts penetrating the positioning through holes.

[0032] Furthermore, a vibration motor and a screen are provided in the discharge barrel;

[0033] The screen is arranged horizontally, and its edge matches the inner wall of the cavity in the discharge barrel;

[0034] The output end of the vibration motor is fixedly connected to the screen.

[0035] Accordingly, a second aspect of an embodiment of the present invention provides a method for controlling an automatic filling device for a molding machine, comprising the following steps:

[0036] Control the upper barrel to discharge materials to the lower barrel according to the preset time;

[0037] Obtaining weight information of the material received in the material discharge barrel;

[0038] According to the comparison table of discharge weight and discharge time of various materials pre-stored in the control component, the type of material discharged this time is obtained;

[0039] According to the preset discharge weight of each type of material, the discharge barrel is controlled to discharge the preset weight of the material of this discharge category into the mold feeding box.

[0040] The above technical solution of the embodiment of the present invention has the following beneficial technical effects:

[0041] Through the screw transmission device combined with the output results of the weighing sensor, automatic weighing and filling are realized. According to the special characteristics of different powders, the precise feeding mechanism is adjusted through self-feedback to realize self-feedback precise filling of different powders, which improves the qualified rate of pressed blocks and greatly improves work efficiency. The staff turns the fastening bolts and removes the fastening bolts from the first thread groove and the second thread groove, which makes it easier for the staff to disassemble the discharge barrel and clean the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 The automatic filling device for the molding machine provided by the embodiment of the present invention is an overall schematic diagram Figure 1 ;

[0043] Figure 2 The automatic filling device for the molding machine provided by the embodiment of the present invention is an overall schematic diagram Figure 2 ;

[0044] Figure 3is an enlarged view of the structure A of the automatic filling device for a molding machine provided in an embodiment of the present invention;

[0045] Figure 4 It is a cross-sectional view of a feed barrel of an automatic filling device for a molding machine provided in an embodiment of the present invention.

[0046] Reference numerals:

[0047] 1. Mounting bracket; 2. Guide rail; 3. Stepper motor; 4. Threaded rod; 5. Limit plate; 6. Horizontal slider; 7. Connecting plate; 8. Slide groove; 9. Longitudinal slider; 10. Bidirectional cylinder; 11. Upper solenoid valve; 12. Positioning slot; 13. Fastening bolt; 14. First thread groove; 15. Positioning sheet; 16. Second thread groove; 17. Lower barrel; 18. Weighing sensor; 19. Lower solenoid valve; 20. Upper barrel; 21. Position sensor; 22. Control component; 23. Mold feeding box; 24. Handle; 25. Vibration motor; 26. Screen. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0049] Please refer to Figure 1 The first aspect of the embodiment of the present invention provides an automatic filling device for a molding machine, comprising an installation bracket 1, a transmission assembly, a lower material barrel 17, an upper material barrel 20, a mold feeding box 23 and a control assembly 22; one end of the transmission assembly is connected to the installation bracket 1, and the other end thereof is slidably connected to the lower material barrel 17; the upper material barrel 20 is fixedly connected to the installation bracket 1; the mold feeding box 23 is fixedly arranged at the bottom of the installation bracket 1; the control assembly 22 is electrically connected to the transmission assembly, the lower material barrel 17 and the upper material barrel 20 respectively, and controls the discharge amount of the upper material barrel 20 through the upper solenoid valve 11 at the bottom of the upper material barrel 20, controls the transmission assembly to drive the lower material barrel 17 to reciprocate in the horizontal and vertical directions, obtains the weight information of the material received by the lower material barrel 17 and controls it to discharge the material to the mold feeding box 23 through the lower solenoid valve 19 at its bottom.

[0050] Furthermore, a position sensor 21 electrically connected to the control component 22 is provided at the edge of the upper material bucket 20 ; the position sensor 21 obtains the position information of the lower material bucket 17 and sends it to the control component 22 .

[0051] Furthermore, the material discharge barrel 17 is provided with a weighing sensor 1818 electrically connected to the control component 22 ; the weighing sensor 1818 obtains weight information of the material received in the material discharge barrel 17 and sends it to the control component 22 .

[0052] Furthermore, the transmission assembly includes: a stepper motor 3, a threaded rod 4, a guide rail 2, a transverse slider 6, a connecting plate 7, a longitudinal slider 9, and a bidirectional cylinder 10; the guide rail 2 is fixedly connected to the mounting bracket 1; the stepper motor 3 is fixedly mounted on the side wall of the mounting bracket 1; the threaded rod 4 is horizontally arranged, and one end thereof is fixedly connected to the output end of the stepper motor 3; the transverse slider 6 is rotatably connected to the threaded rod 4; the connecting plate 7 is longitudinally arranged, and one side thereof is fixedly connected to the side wall of the transverse slider 6, and the top of the other side thereof is fixedly connected to the base of the bidirectional cylinder 10; the bidirectional One end of the cylinder 10 slides along the guide rail 2, and the other end thereof is connected to the longitudinal slider 9 through a connecting rod; the longitudinal slider 9 is fixedly connected to the side wall of the discharge barrel 17 on the side away from the connecting plate 7; when the stepper motor 3 drives the threaded shaft to rotate, it drives the transverse slider 6 to reciprocate axially along the threaded rod 4, and the bidirectional cylinder 10 moves synchronously along the guide rail 2 when the transverse slider 6 moves along the threaded rod 4; the bidirectional cylinder 10 is electrically connected to the control component 22, and under the control of the control component 22, it drives the discharge barrel 17 to reciprocate in the vertical direction through the longitudinal slider 9.

[0053] Through the above technical scheme, the stepper motor 3 drives the threaded rod 4 to rotate, and the threaded rod 4 can drive the discharge barrel 17 to move bidirectionally along the threaded rod 4. The bidirectional cylinder 10 can drive the discharge barrel 17 to move up and down along the connecting plate 7 in the slide 8, which is convenient for accurately weighing the powder in the discharge barrel 17 and transferring it to the mold feeding box 23, which can reduce labor costs and increase product qualification rate.

[0054] Furthermore, a longitudinally arranged slide groove 8 is provided on one side of the connecting plate 7 facing the longitudinal sliding block 9 ; the longitudinal sliding block 9 is slidably connected to the connecting plate 7 through the slide groove 8 under the drive of the bidirectional cylinder 10 .

[0055] Furthermore, a limiting plate 5 is provided at one end of the threaded rod 4 away from the stepping motor 3. The limiting plate 5 can have a limiting effect on the threaded slider.

[0056] Optionally, the mold feeding box 23 has two opposite sidewalls provided with handles 24. Preferably, the handles 24 are provided with anti-skid textures to improve the anti-skid property of the operator when extracting the mold feeding box 23.

[0057] Optionally, a groove corresponding to the mold feeding box 23 is provided at the bottom of the mounting bracket 1 .

[0058] Furthermore, the longitudinal slider 9 is provided with a plurality of U-shaped positioning grooves on the side facing the material discharge barrel 17; the material discharge barrel 17 is provided with a positioning piece 15 corresponding to the U-shaped positioning groove on the side facing the longitudinal slider 9; the U-shaped positioning groove and the positioning piece 15 are respectively provided with horizontal positioning through holes; the longitudinal slider 9 and the material discharge barrel 17 are fixedly connected by bolts passing through the positioning through holes. Specifically, the longitudinal slider 9 is provided with a plurality of first thread grooves 14, and the positioning piece 15 of the material discharge barrel 17 is provided with a plurality of second thread grooves 16, and the fastening bolts 13 fasten the longitudinal slider 9 and the material discharge barrel 17 through the first thread grooves 14 and the second thread grooves 16.

[0059] Through the positioning grooves, positioning pieces 15 and bolts, operators can conveniently disassemble and maintain the discharge barrel 17, thereby improving the convenience of cleaning and maintenance of the equipment.

[0060] Specifically, the bottom of the material discharge barrel 17 is a sloped structure, which can prevent the material inside from piling up at the inner edge and affecting the weighing accuracy of the material discharge barrel 17 on the material inside.

[0061] Furthermore, a vibration motor 25 and a screen 26 are provided in the discharge barrel 17 ; the screen 26 is arranged horizontally, and its edge matches the inner wall of the cavity in the discharge barrel 17 ; the output end of the vibration motor 25 is fixedly connected to the screen 26 .

[0062] By providing a vibration motor 25 connected to the screen 26 , the problem of powder jamming during the material transfer from the material discharge barrel 17 to the mold feeding box 23 can be avoided.

[0063] Accordingly, a second aspect of an embodiment of the present invention provides a method for controlling an automatic filling device for a molding machine, comprising the following steps:

[0064] S100, control the upper barrel 20 to discharge the material from the lower barrel 17 according to the preset time.

[0065] S200, obtaining the weight information of the material received in the material discharge barrel 17.

[0066] S300, obtaining the type of material discharged this time according to the comparison table of discharge weight and discharge time of various types of materials pre-stored in the control component 22.

[0067] S400, according to the preset discharge weight of each type of material, control the discharge barrel 17 to discharge the preset weight of the material of this discharge category into the mold feeding box 23.

[0068] Automatic feedback adjustment and precise feeding mechanism:

[0069] First, given the required powder mass \(m\), record the initial reading \(m_0\) of the weighing sensor 18. Open the upper solenoid valve 11 of the upper material bucket 20 for \(t_1\) seconds. The powder flows from the upper material bucket 20 into the lower material bucket 17. At the same time, the weighing sensor 18 measures the mass change \(\Delta m\) of the lower material bucket 17. When \(\Delta m = m\), close the upper solenoid valve 11 of the upper material bucket 20. Then open the lower solenoid valve 19 of the lower material bucket 17 to inject the powder into the mold feeding box 23. When \(\Delta m\) no longer changes, check the relationship between the current mass reading (\(m'=m_0 + \Delta m\)) and \(m_0\). When \(m' = m_0\), the powder mass in the mold feeding box 23 is the given required powder mass \(m\) at this time; when \(m'>m_0\), start the vibration motor 25 in the lower material bucket 17 for \(t_2\) seconds to make \(m' = m_0\). At this time, all the powder in the lower material bucket 17 leaks down, and there will be no powder jamming situation; when \(m'<m_0\), it proves that the powder volume in the upper material bucket 20 is insufficient, and enough powder needs to be added to the upper material bucket 20 to continue working. Among them, \(t_1\) and \(t_2\) must establish a dropping model through the feedback method to determine appropriate \(t_1\) and \(t_2\). The first \(t_1\) is the opening time of the upper solenoid valve 11 of the upper material bucket 20 when \(\Delta m = m\); \(t_2\) is the opening time of the upper solenoid valve 11 of the upper material bucket 20 when \(m' = m_0\). Use the least squares method to determine the relationship between different types of powders, the required mass, and \(t_1\), \(t_2\). The flow chart is as shown in the following figure, which can realize adaptive and precise control of automatic feeding. When the added amount is inaccurate each time or different types of powders are replaced, the model should be determined again to calculate the corrected \(t_1\) and \(t_2\).

[0070] Working principle: The staff turns on the stepper motor 3. When the stepper motor 3 works, the lower material bucket 17 can move bidirectionally along the threaded rod 4. When it moves to the outlet of the upper material bucket 20, the upper solenoid valve 11 is opened, and the upper material bucket 20 feeds the lower material bucket 17. When the weighing sensor 18 measures that the mass change of the lower material bucket 17 is equal to the required powder mass, the upper solenoid valve 11 is closed, and the loading of the lower material bucket 17 ends. The double-acting cylinder 10 drives the slider to move downward in the chute 8, thereby driving the lower material bucket 17 to move downward to the upper end of the mold feeding box 23. The lower solenoid valve 19 is opened, and the lower material bucket 17 feeds. When the weighing sensor 18 measures that the mass change of the lower material bucket 17 is equal to the required powder mass, the feeding of the lower material bucket 17 ends. The lower material bucket 17 returns to the position of the upper material bucket 20 to wait, and the molding machine starts to work, repeating in a cycle.

[0071] Through the above control method, after obtaining the weight information of the material received by the lower material bucket 17, the control component 22 can determine the type of this material according to the discharging time of the upper material bucket 20 and through the comparison table of the discharging weight and discharging time of various stored materials. Then, according to the type of the material, control the lower material bucket 17 to inject the preset weight of this type of material into the mold feeding box 23, realizing the type identification, automatic feedback, and precise control of feeding.

[0072] The embodiment of the present invention aims to protect an automatic filling device for a molding machine and a control method thereof, including: a mounting bracket, a transmission assembly, a lower material barrel, an upper material barrel, a mold feeding box and a control assembly; one end of the transmission assembly is connected to the mounting bracket, and the other end thereof is slidably connected to the lower material barrel; the upper material barrel is fixedly connected to the mounting bracket; the mold feeding box is fixedly arranged at the bottom of the mounting bracket; the control assembly is electrically connected to the transmission assembly, the lower material barrel and the upper material barrel respectively, and the discharge amount is controlled by the upper solenoid valve at the bottom of the upper material barrel, and the transmission assembly is controlled to drive the lower material barrel to reciprocate in the horizontal and vertical directions, and the weight information of the material received by the lower material barrel is obtained and the lower solenoid valve at the bottom thereof is used to control the discharge of the material to the mold feeding box. The above technical scheme has the following effects:

[0073] Through the screw transmission device combined with the output results of the weighing sensor, automatic weighing and filling are realized. According to the special characteristics of different powders, the precise feeding mechanism is adjusted through self-feedback to realize self-feedback precise filling of different powders, which improves the qualified rate of pressed blocks and greatly improves work efficiency. The staff turns the fastening bolts and removes the fastening bolts from the first thread groove and the second thread groove, which makes it easier for the staff to disassemble the discharge barrel and clean the screen.

[0074] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. An automatic filling device for a molding machine, characterized in that: include: Install the bracket, transmission assembly, lower material bucket, upper material bucket, mold feeding box and control assembly; One end of the transmission assembly is connected to the mounting bracket, and the other end thereof is slidably connected to the discharge barrel; The loading bucket is fixedly connected to the mounting bracket; The mold feeding box is fixedly arranged at the bottom of the mounting bracket; The control component is electrically connected to the transmission component, the lower material barrel and the upper material barrel respectively, and controls the discharge amount of the upper material barrel through the upper solenoid valve at the bottom, controls the transmission component to drive the lower material barrel to reciprocate in the horizontal and vertical directions, obtains the weight information of the material received by the lower material barrel and controls it to discharge the material to the mold feeding box through the lower solenoid valve at the bottom; The transmission assembly includes: a stepper motor, a threaded rod, a guide rail, a transverse slider, a connecting plate, a longitudinal slider, and a bidirectional cylinder; The guide rail is fixedly connected to the mounting bracket; The stepper motor is fixed to the side wall of the mounting bracket; The threaded rod is arranged horizontally, and one end thereof is fixedly connected to the output end of the stepping motor; The transverse slider is rotatably connected to the threaded rod; The connecting plate is arranged longitudinally, one side of which is fixedly connected to the side wall of the transverse slider, and the top of the other side is fixedly connected to the base of the bidirectional cylinder; One end of the bidirectional cylinder slides along the guide rail, and the other end is connected to the longitudinal slider via a connecting rod; The side of the longitudinal sliding block away from the connecting plate is fixedly connected to the side wall of the lower material barrel; When the stepping motor drives the threaded rod to rotate, it drives the transverse slider to move back and forth along the axial direction of the threaded rod, and the bidirectional cylinder moves synchronously along the guide rail when the transverse slider moves along the threaded rod; The bidirectional cylinder is electrically connected to the control component, and drives the discharge barrel to reciprocate in the vertical direction through the longitudinal slider under the control of the control component; A position sensor electrically connected to the control component is provided at the edge of the loading barrel; The position sensor obtains the position information of the discharge barrel and sends it to the control component.

2. The automatic filling device for a molding machine according to claim 1, characterized in that: The unloading barrel is provided with a weight sensor electrically connected to the control component; The weight sensor obtains the weight information of the material received in the material discharge barrel and sends it to the control component.

3. The automatic filling device for a molding machine according to claim 1, characterized in that: A longitudinally arranged sliding groove is provided on one side of the connecting plate facing the longitudinal sliding block; The longitudinal sliding block is driven by the bidirectional cylinder and is slidably connected to the connecting plate through the sliding groove.

4. The automatic filling device for a molding machine according to claim 1, characterized in that: A limiting plate is provided at one end of the threaded rod away from the stepping motor.

5. The automatic filling device for a molding machine according to claim 1, characterized in that: The mold feeding box has handles on two opposite side walls.

6. The automatic filling device for a molding machine according to claim 1, characterized in that: The longitudinal sliding block is provided with a plurality of U-shaped positioning grooves on one side facing the discharge barrel; A positioning piece corresponding to the U-shaped positioning groove is provided on one side of the lower material barrel facing the longitudinal sliding block; The U-shaped positioning groove and the positioning piece are respectively provided with positioning through holes in the horizontal direction; The longitudinal sliding block and the lower material bucket are fixedly connected by bolts penetrating the positioning through holes.

7. The automatic filling device for a molding machine according to any one of claims 1 to 6, characterized in that: A vibration motor and a screen are arranged in the discharge barrel; The screen is arranged horizontally, and its edge matches the inner wall of the cavity in the discharge barrel; The output end of the vibration motor is fixedly connected to the screen.

8. A method for controlling an automatic filling device for a molding machine, characterized in that: Used to control the automatic filling device for a molding machine as described in any one of claims 1 to 7, comprising the following steps: Control the upper barrel to discharge materials to the lower barrel according to the preset time; Obtaining weight information of the material received in the material discharge barrel; According to the comparison table of discharge weight and discharge time of various materials pre-stored in the control component, the type of material discharged this time is obtained; According to the preset discharge weight of each type of material, the discharge barrel is controlled to discharge the preset weight of the material of this discharge category into the mold feeding box.

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