Device for driving upper mold and lower mold to automatically turn over and using method

Abstract

The invention relates to the technical field of mechanical demolding, in particular to a control system for driving an upper mold and a lower mold to automatically turn over and a using method. Comprising a hydraulic machine body composed of an oil cylinder, an upper beam, a movable beam, a lower beam and stand columns, a turnover mechanism is arranged between the movable beam and the lower beam and comprises an upper turnover table and a lower turnover table, the upper turnover table is rotationally connected to the lower plane of the movable beam, the lower turnover table is rotationally connected to the upper plane of the lower beam, and the stand columns are arranged on the upper plane of the lower turnover table. The turnover mechanism is in transmission connection with a transmission mechanism, and the transmission mechanism is used for rotating the turnover mechanism in the vertical direction of the hydraulic machine. By means of the device, uniform filling of raw materials is guaranteed, the product quality is improved, and the finished product taking-out time is saved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical demoulding, and in particular to a control system for driving upper and lower molds to automatically flip and a use method thereof. Background Art

[0002] In die casting, if the upper and lower parts of the product have large structural differences and pressure injection from different directions is required to ensure sufficient filling and uniform solidification of the molten metal, the mold will be flipped at the appropriate time. When some injection molds are used to produce products with special structures, in order to ensure that different parts of the product can be evenly filled and well formed, they also need to be flipped a certain number of degrees in a specific process. By flipping the mold, the flow path of the molten metal can be changed, thereby improving product quality. However, when using the flip mold on the market, the mold must be removed from the hydraulic press, and then the auxiliary equipment must be used to flip the mold 180 degrees to take out the pressed finished product, which greatly increases the processing time and manufacturing cost. Summary of the invention

[0003] The purpose of the present invention is to solve the problems existing in the prior art and to propose a device for driving the upper and lower molds to automatically flip and a method of using the device.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a device for driving the upper and lower molds to automatically flip, including a hydraulic press body composed of an oil cylinder, an upper beam, a movable beam, a lower beam and a column, a flipping mechanism is arranged between the movable beam and the lower beam, the flipping mechanism includes an upper flipping table and a lower flipping table, the upper flipping table is rotatably connected to the lower plane of the movable beam, the lower flipping table is rotatably connected to the upper plane of the lower beam, the flipping mechanism is connected to a transmission mechanism, and the transmission mechanism is used to rotate the flipping mechanism along the horizontal direction of the hydraulic press.

[0005] Furthermore, the upper turning platform and the lower turning platform are both semi-cylinders with the same structure, and a plurality of arc-shaped T-shaped grooves are arranged along the arc surface of the upper turning platform and the lower turning platform.

[0006] Furthermore, an upper arc groove matching the shape of the upper turning platform is provided on the lower plane of the movable beam, and a plurality of arc-shaped T-shaped blocks are provided in the upper arc groove; a lower arc groove matching the shape of the lower turning platform is provided inside the lower beam, and the same arc-shaped T-shaped blocks are provided in the lower arc groove; the arc-shaped T-shaped blocks in the upper arc groove and the lower arc groove establish a sliding fit with the arc-shaped T-shaped grooves of the upper turning platform and the lower turning platform.

[0007] Furthermore, upper gears are respectively arranged along the arc-shaped T-shaped grooves on the outermost sides of the arc surface of the upper turning table, and lower gears are respectively arranged along the arc-shaped T-shaped grooves on the outermost sides of the arc surface of the lower turning table.

[0008] Furthermore, the transmission mechanism includes an upper transmission mechanism and a lower transmission mechanism. The upper transmission mechanism includes a main transmission assembly and a secondary transmission assembly. The main transmission assembly includes two L-shaped brackets 1, a transmission shaft 1, a gear 1 and a motor. The short sides of the two L-shaped brackets 1 are fixedly connected to the lower plane of the movable beam. The transmission shaft 1 passes through the long sides of the two L-shaped brackets 1. Both ends of the transmission shaft 1 are respectively connected to the gear 1. The end of the transmission shaft 1 is connected to the output end of the motor. The secondary transmission assembly includes two L-shaped brackets 2, a transmission shaft 2, and a gear 2. The short sides of the two L-shaped brackets 2 are fixedly connected to the lower plane of the movable beam. The transmission shaft 2 passes through the long sides of the two L-shaped brackets 2. Both ends of the transmission shaft 2 are respectively connected to the gear 2. The upper transmission mechanism and the lower transmission mechanism have the same structure and are symmetrically arranged.

[0009] Furthermore, the main transmission assembly and the secondary transmission assembly in the upper transmission mechanism are respectively meshed with the upper gear of the upper turning platform, and the main transmission assembly and the secondary transmission assembly in the lower transmission mechanism are respectively meshed with the lower gear of the lower turning platform.

[0010] Furthermore, a mold is arranged inside the flipping mechanism, and the mold includes an upper mold and a lower mold.

[0011] Furthermore, an upper groove for storing the upper mold is provided at the center of the upper turning table, an upper T-shaped through groove for fixing the upper mold is provided at the top of the upper groove, and a lower groove for storing the lower mold is provided at the bottom of the lower groove.

[0012] Furthermore, a method of use, according to the above-mentioned device for driving the upper and lower molds to automatically flip, comprises the following steps: S1. Install the upper turning table in the upper arc groove in the movable beam, install the lower turning table in the lower arc groove in the lower beam, install the upper mold and the lower mold, and perform filling; It also includes S11, turning the upper mold and the lower mold by any number of turns through the transmission mechanism to ensure the uniformity of the filler; In the above-mentioned flipping, the shear force is calculated as , where F is the shear force, M is the mass of the liquid metal, ω is the angular velocity of the mold rotation, and r is the radius of the mold; S2, pressing, maintaining pressure, and releasing pressure; S3, taking out the pressed product; and also including turning the upper mold and the lower mold 180 degrees, and the pressed product automatically falls out.

[0013] Compared with the prior art, the device and method for automatically turning over the upper and lower molds provided by the present invention have the following advantages: 1. Ensure uniform filling of raw materials. When some injection molds are used to produce products with special structures, in order to ensure that different parts of the product can be evenly filled and well formed, they need to be flipped 180 degrees in a specific process; 2. For some plastic products with complex shapes and asymmetric structures, the feeding direction and flow path can be changed by flipping the mold, thereby improving product quality; 3. Convenient material removal: after the hydraulic press is finished, the workbench flips 180 degrees to use the product's own gravity to take out the finished product pressed in the mold, which greatly saves the time of taking out the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the front view structure of the present invention without a mold; Figure 3 This is a schematic cross-sectional view of the structure without a mold and a turning mechanism of the present invention; Figure 4 This is a schematic diagram of the lower beam structure of the present invention; Figure 5 This is a schematic diagram of the bottom flip mold structure of the present invention; In the figure: 1, hydraulic press, 11, oil cylinder, 12, upper beam, 13, movable beam, 131, upper arc groove, 14, lower beam, 141, lower arc groove, 15, column, 20. Upper turning table, 201. Upper gear, 202. Upper groove, 203. Upper T-shaped slot, 21. lower turning table, 211. lower gear, 212. lower groove, 213. lower T-shaped through groove, 22. Arc T-slot, 23. Arc T-block, 30. Upper transmission mechanism, 31. Lower transmission mechanism, 40. upper mold, 41. lower mold. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0017] Embodiment 1, as Figure 1-Figure 4 As shown, a device for automatically turning over upper and lower molds includes a hydraulic press 1 body consisting of an oil cylinder 11, an upper beam 12, a movable beam 13, a lower beam 14 and a column 15. A turning mechanism is arranged between the movable beam 13 and the lower beam 14. The turning mechanism includes an upper turning table 20 and a lower turning table 21. The upper turning table 20 is rotatably connected to the lower plane of the movable beam 13, and the lower turning table 21 is rotatably connected to the upper plane of the lower beam 14. The turning mechanism is connected to a transmission mechanism, and the transmission mechanism is used to rotate the turning mechanism along the vertical direction of the hydraulic press 1.

[0018] The turning mechanism is turned over by the transmission mechanism to ensure the uniformity of fluid filling. After the product is pressed, the upper mold 40 and the lower mold 41 can also be turned over again to facilitate the removal of the pressed product.

[0019] Example 2, please continue to refer to Figure 1 The upper turning platform 20 and the lower turning platform 21 are both semi-cylindrical, and a plurality of arc-shaped T-shaped grooves 22 are arranged along the arc surface of the upper turning platform 20 and the lower turning platform 21.

[0020] In embodiment 3, an upper arc groove 131 matching the outer shape of the upper turning platform 20 is provided on the lower plane of the movable beam 13, and an arc-shaped T-shaped block 23 is provided in the upper arc groove 131; a lower arc groove 141 matching the outer shape of the lower turning platform 21 is provided inside the lower beam 14, and the same arc-shaped T-shaped block 23 is provided in the lower arc groove 141; the arc-shaped T-shaped blocks 23 in the upper arc groove 131 and the lower arc groove 141 establish a sliding fit with the arc-shaped T-shaped grooves 22 of the upper turning platform 20 and the lower turning platform 21.

[0021] The arcuate T-shaped block 23 is configured to be able to slide in the arcuate T-shaped slot 22 , so that the entire flipping mechanism can be rotated along the arcuate T-shaped slot 22 .

[0022] Upper gears 201 are respectively disposed along the arcuate T-shaped grooves 22 on the outermost sides of the arcuate surface of the upper turning platform 20 , and lower gears 211 are respectively disposed along the arcuate T-shaped grooves 22 on the outermost sides of the arcuate surface of the lower turning platform 21 .

[0023] In order to rotate the entire flipping mechanism, a transmission mechanism is also arranged on both sides of the flipping mechanism, the transmission mechanism includes an upper transmission mechanism 30 and a lower transmission mechanism 31, the upper transmission mechanism 30 includes a main transmission assembly and a secondary transmission assembly, the main transmission assembly includes two L-shaped brackets 1, a transmission shaft 1, a gear 1 and a motor, the short sides of the two L-shaped brackets 1 are fixedly connected to the lower plane of the movable beam 13, the transmission shaft 1 passes through the long sides of the two L-shaped brackets 1, the two ends of the transmission shaft 1 are respectively connected to the gear 1, and the end of the transmission shaft 1 is connected to the output end of the motor, the secondary transmission assembly includes two L-shaped brackets 2, a transmission shaft 2, and a gear 2, the short sides of the two L-shaped brackets 2 are fixedly connected to the lower plane of the movable beam 13, the transmission shaft 2 passes through the long sides of the two L-shaped brackets 2, and the two ends of the transmission shaft 2 are respectively connected to the gear 2, and the upper transmission mechanism 30 and the lower transmission mechanism 31 have the same structure and are symmetrically arranged.

[0024] The main transmission assembly and the secondary transmission assembly in the upper transmission mechanism 30 are respectively meshed with the upper gear 201 of the upper turning platform 20 , and the main transmission assembly and the secondary transmission assembly in the lower transmission mechanism 31 are respectively meshed with the lower gear 211 of the lower turning platform 21 .

[0025] A mold is disposed inside the flip mechanism, and the mold includes an upper mold 40 and a lower mold 41 .

[0026] The specific meshing is that the two gears 1 and the two gears 2 in the upper transmission mechanism 30 mesh with the upper gears 201 on both sides of the upper turning platform 20. When the gear 1 is rotated by the motor, the upper turning platform 20 is driven to rotate. When the upper turning platform 20 rotates to the lower arc groove 141 in the lower beam 14, the upper gears 201 on both sides of the upper turning platform 20 mesh with the gears 1 and 2 of the lower transmission mechanism 31.

[0027] In this embodiment, the motor of the transmission mechanism is a servo motor, which can be controlled by an external control system.

[0028] The upper turning table 20 is provided with an upper groove 202 for storing the upper mold 40, and the top of the upper groove 202 is provided with an upper T-shaped through groove 203 for fixing the upper mold 40. The lower turning table 21 is provided with a lower groove 212 for storing the lower mold 41, and the bottom of the lower groove 212 is provided with a lower T-shaped through groove 213 for fixing the lower mold 41.

[0029] In this embodiment, the upper mold 40 and the lower mold 41 are installed respectively through the upper T-shaped through groove 203 and the lower T-shaped through groove 213, and the upper mold 40 and the lower mold 41 are respectively provided with protrusions that can match the upper T-shaped through groove 203 and the lower T-shaped through groove 213, so that the upper mold 40 and the lower mold 41 are respectively installed on the lower plane of the movable beam 13 and the upper plane of the lower beam 14.

[0030] Through the transmission of the upper transmission mechanism 30 and the lower transmission mechanism 31 , the upper turning table 20 and the lower turning table 21 can rotate 180 degrees or any other degree along the arc T-shaped blocks 23 on the upper arc groove 131 and the lower arc groove 141 .

[0031] A method of use, according to the above-mentioned device for driving the upper and lower molds to automatically flip, comprises the following steps: S1, installing the upper turning table 20 in the upper arc groove 131 in the movable beam 13, installing the lower turning table 21 in the lower arc groove 141 in the lower beam 14, and then installing the upper mold 40 and the lower mold 41 on the upper turning table 20 and the lower turning table 21 respectively, and performing filling; The method further includes S11, turning the upper mold 40 and the lower mold 41 by any number of turns through a transmission mechanism to ensure uniformity of the filler; In the above-mentioned flipping, the shear force is calculated as , where F is the shear force, M is the mass of the liquid metal, ω is the angular velocity of the mold rotation, and r is the radius of the mold. By calculating the angular velocity ω of the mold rotation, the rotation speeds of gears 1 and 2 in the transmission mechanism can be known; S2, pressing, maintaining pressure, and releasing pressure; S3, taking out the pressed product; and also includes turning the upper mold 40 and the lower mold 41 180 degrees, and the pressed product automatically falls out.

[0032] In this embodiment, a metal liquid is pressed. In order to ensure the uniformity of fluid filling, the shear stress can be calculated first. The rheological equation is: , shear stress The internal force generated by the velocity differences between the layers of the fluid can cause mixing of the fluid or changes in the flow pattern. Shear stress helps ensure that the metal liquid can evenly fill all parts of the mold without voids or defects.

[0033] The shear stress can be expressed by Calculate, where is the shear stress, F is the shear force, and A is the area of ​​the mold cavity, and the shear force can be calculated.

[0034] The shear force can be It is calculated that since the mold is fixed and rotated in the flip mechanism, the rotation speed of the mold is equal to the rotation speed of the flip mechanism, and the rotation speed of the flip mechanism is: , where N1 is the rotation speed of the flipping mechanism, ω is the angular velocity of the mold rotation, and r is the radius of the mold. Assume that the gear reduction ratio of the flipping mechanism and the transmission mechanism is i, because , where N1 is the rotation speed of the flip mechanism, N2 is the rotation speed of gear one or gear two, D1 is the pitch circle diameter of the flip mechanism, and D2 is the pitch circle diameter of gear one or gear two. From this, the rotation speed of gear one and gear two in the transmission mechanism can be obtained, and the rotation speed of the motor can be set accordingly, ultimately achieving uniform filling of the metal liquid.

[0035] In the present embodiment, the turning mechanism is mainly used for pressing liquid materials. During filling, the lower turning table 21 is always connected to the lower transmission mechanism 31, which is equivalent to the gears 1 and 2 on the lower transmission mechanism 31 always meshing with the lower gear 211 on the lower turning table 21. The gears have a self-locking function, so the lower turning table 21 can be stably fixed in the lower groove 212 in the lower beam 14. Similarly, the upper turning table 20 is also fixed in the upper groove 202 in the movable beam 13 through the upper transmission mechanism 30.

[0036] If it is necessary to overturn the upper mold or the lower mold to ensure uniform filling of the material, after the mold is closed, the overturning mechanism can be driven to rotate the corresponding number of circles by the rotation of the motor. If the lower overturning table 21 is on the lower beam 14 during demoulding, the motor can be rotated, and the gears 1 and 2 on the lower transmission mechanism 31 mesh with the lower gear 211 on the lower overturning table 21, and the arc-shaped T-shaped groove 22 on the lower overturning table 21 rotates along the arc-shaped T-shaped block 23 on the lower beam 14, as shown in FIG. Figure 2 As shown, we let the flipping mechanism flip clockwise, the left side of the lower flipping table 21 disengages from the gear 2 on the lower transmission mechanism 31, and meshes with the gear 2 on the left side of the upper transmission mechanism 30. Similarly, the right side of the upper flipping table 20 disengages from the gear 1 on the right side of the upper transmission mechanism 30, and meshes with the gear 1 on the right side of the lower transmission mechanism 31. Therefore, the entire flipping mechanism can be driven by the upper transmission mechanism 30 and the lower transmission mechanism 31 to flip. When demolding, the lower flipping table 21 can also be rotated into the upper groove 202 in the upper movable beam 13, and the finished product pressed in the mold can be taken out by the product's own gravity.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A control system for driving the automatic flipping of upper and lower molds, comprising a hydraulic press (1) body consisting of an oil cylinder (11), an upper beam (12), a movable beam (13), a lower beam (14) and a column (15), characterized in that: A turning mechanism is provided between the movable beam (13) and the lower beam (14), the turning mechanism comprising an upper turning platform (20) and a lower turning platform (21), the upper turning platform (20) being rotatably connected to the lower plane of the movable beam (13), the lower turning platform (21) being rotatably connected to the upper plane of the lower beam (14), the turning mechanism being transmission-connected to a transmission mechanism, the transmission mechanism being used to rotate the turning mechanism along the vertical direction of the hydraulic press (1).

2. A control system for driving the upper and lower molds to automatically flip according to claim 1, characterized in that: The upper turning platform (20) and the lower turning platform (21) are both semi-cylindrical bodies with grooves of the same structure, and a plurality of arc-shaped T-shaped grooves (22) are arranged along the arc surface of the upper turning platform (20) and the lower turning platform (21).

3. The control system for driving the upper and lower molds to automatically flip according to claim 1, characterized in that: The lower plane of the movable beam (13) is provided with an upper arc groove (131) matching the shape of the upper turning platform (20), and a plurality of arc-shaped T-shaped blocks (23) are arranged in the upper arc groove (131). The upper plane of the lower beam (14) is provided with a lower arc groove (141) matching the shape of the lower turning platform (21), and a similar arc-shaped T-shaped block (23) is arranged in the lower arc groove (141). The arc-shaped T-shaped blocks (23) in the upper arc groove (131) and the lower arc groove (141) establish sliding fit with the arc-shaped T-shaped grooves (22) of the upper turning platform (20) and the lower turning platform (21).

4. The control system for driving the upper and lower molds to automatically flip according to claim 2, characterized in that: Upper gears (201) are arranged on the outermost two sides of the arc surface of the upper turning platform (20) along the direction of the arc-shaped T-shaped groove (22), and lower gears (211) are arranged on the outermost two sides of the arc surface of the lower turning platform (21) along the direction of the arc-shaped T-shaped groove (22).

5. The control system for driving the upper and lower molds to automatically flip according to claim 1, characterized in that: The transmission mechanism comprises an upper transmission mechanism (30) and a lower transmission mechanism (31); the upper transmission mechanism (30) comprises a main transmission assembly and a secondary transmission assembly; the upper transmission mechanism (30) and the lower transmission mechanism (31) have the same structure and are symmetrically arranged.

6. The control system for driving the upper and lower molds to automatically flip according to claim 5, characterized in that: The main transmission assembly and the secondary transmission assembly in the upper transmission mechanism (30) are respectively meshed with the upper gear (201) of the upper turning platform (20), and the main transmission assembly and the secondary transmission assembly in the lower transmission mechanism (31) are respectively meshed with the lower gear (211) of the lower turning platform (21).

7. The control system for driving the upper and lower molds to automatically flip according to claim 1, characterized in that: A mould is arranged inside the turnover mechanism, and the mould comprises an upper mould (40) and a lower mould (41).

8. The control system for driving the upper and lower molds to automatically flip according to claim 2, characterized in that: The upper turning table (20) is provided with an upper groove (202) at the center for storing the upper mold (40), and an upper T-shaped through groove (203) for fixing the upper mold (40) is provided at the top of the upper groove (202). The lower turning table (20) is provided with a lower groove (212) for storing the lower mold (41), and a lower T-shaped through groove (213) for fixing the lower mold (41) is provided at the bottom of the lower groove (212).

9. A method of use, according to the control system for driving the upper and lower molds to automatically flip over according to claim 1 to claim 8, characterized in that: The following steps are involved: S1, installing the upper turning table (20) in the upper arc groove (131) in the movable beam (13), installing the lower turning table (21) in the lower arc groove (141) in the lower beam (14), and then installing the upper mold (40) and the lower mold (41) on the upper turning table (20) and the lower turning table (21) respectively, and performing filling; The method further comprises S11, turning the upper mold (40) and the lower mold (41) by any number of turns through a transmission mechanism to ensure uniformity of the filler; In the above-mentioned flipping, the shear force is calculated as , where F is the shear force, M is the mass of the liquid metal, ω is the angular velocity of the mold rotation, and r is the radius of the mold; S2, pressing, maintaining pressure, and releasing pressure; S3, taking out the pressed product; and also including turning the upper mold (40) and the lower mold (41) 180 degrees, so that the pressed product automatically falls out.

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