Die-casting die cavity vacuumizing system

Abstract

The invention discloses a die-casting die cavity vacuumizing system, and belongs to the technical field of die vacuumizing. Aiming at the problem that a filtering structure in a vacuum pipeline of an existing product needs to be frequently maintained, the invention provides the following technical scheme that the vacuum pipeline comprises a plurality of mold main bodies with mold cavities and negative pressure suction equipment for negative pressure suction, and the mold main bodies are connected with the negative pressure suction equipment through pipelines. According to the invention, the gas filtering part is additionally arranged on the mold main body, so that sucked gas is filtered during vacuum suction of the mold cavity, and the impurity removal screen plate in the gas filtering part slides out along with plugging of the vacuum channel, so that the impurity removal screen plate is cleaned by virtue of the suction effect of negative-pressure suction equipment; therefore, the sucked gas is filtered, replacement and maintenance of the filtering structure are avoided, the burden of workers is relieved, the maintenance cost is reduced, single vacuum suction equipment on the mold body is omitted, and the arrangement cost of products is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of mold vacuuming, in particular to a die-casting mold cavity vacuuming system. Background Art

[0002] Die casting is a forming process in which liquid metal fills the mold cavity at a very high speed under high pressure, and cools and solidifies under pressure to obtain a casting. Since the molten metal fills the cavity in a high-speed jet state, most of the gas in the cavity has no time to be discharged, and is inevitably drawn into the molten metal and retained in the die casting in the form of pores, resulting in the formation of more serious pore defects in the die casting, and there are certain problems with the intrinsic quality of the product. In order to improve the intrinsic quality of the product in the die casting technology and avoid most of the gas in the cavity being drawn into the molten metal to form pores and remain in the die casting during die casting, the die casting cavity is generally vacuumed.

[0003] There is a Chinese patent with authorization announcement number CN104209492B, which discloses a die-casting mold cavity vacuum pumping system. It includes a plurality of die-casting molds, a feed channel, a Y-shaped vacuum pumping channel, a branch pipe, a vacuum cylinder, a main pipe, a vacuum tank and a vacuum pumping device on the die-casting mold, a piston body is slidably arranged in each vacuum pumping cylinder, a piston rod is connected to a driving mechanism, and a vacuum stop valve is arranged between the vacuum pumping channel and the feed channel.

[0004] Although the technical solution in the above patent document can realize the vacuum treatment of the mold cavity in two suction modes and prevent the molten metal from entering the vacuum pipe, it still has the following defects in actual use:

[0005] The dust and residual water vapor in the mold cavity will be sucked into the vacuum pipe due to the vacuum negative pressure in the vacuum pipe. The traditional method is to connect a dust particle filter to the vacuum pipe. However, as the number of uses increases, these dust and water vapor will slowly move into the filter element, which will cause the filter element to be blocked over time. Therefore, the filter element needs to be replaced frequently to ensure the vacuum effect, which will not only affect production efficiency, but also increase the maintenance cost of the dust particle filter;

[0006] Although the vacuum suction devices separately configured on the multiple die-casting molds after being connected in series with the vacuum suction devices can ensure the vacuuming operation of a single die-casting mold, the multiple separately configured vacuum suction devices increase the cost of equipment layout, which is not conducive to the promotion and use of the equipment. Summary of the invention

[0007] In order to overcome the above-mentioned defects of the prior art, the present invention provides a die-casting mold cavity vacuum extraction system, which realizes filtering of the sucked gas during vacuum suction of the mold cavity by adding a gas filtering component to the mold body, and as the vacuum channel is blocked, the impurity removal screen in the gas filtering component slides out, and the impurity removal screen is automatically cleaned with the help of the suction effect of the negative pressure suction equipment, thereby realizing the filtration of the sucked gas and avoiding the replacement and maintenance of the filtering structure, reducing the burden on the staff, reducing the maintenance cost, and ensuring the production efficiency of the product, and eliminating the single vacuum suction equipment on the mold body, reducing the layout cost of the product, so as to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A die-casting mold cavity vacuum pumping system, comprising a plurality of mold bodies with mold cavities and a negative pressure suction device for negative pressure suction, wherein the mold bodies are connected to the negative pressure suction device through a pipeline, a plugging mechanism is provided at the bottom of each of the mold bodies, and a gas filter component for connecting the pipeline is installed on the side wall of the mold body, and the mold body comprises a fixed mold and a movable mold for upper and lower mold clamping, wherein both sides of the inner wall of the fixed mold are provided with a receiving groove, a blocking block is slidably connected in the receiving groove, and a through hole is provided on the bottom shell wall of the receiving groove, a rectangular channel penetrating the corresponding side wall of the fixed mold is provided at the top of the left receiving groove to serve as a vacuum channel, and a notch penetrating the corresponding side wall of the fixed mold is provided at the top of the right receiving groove, and the notch is used to serve as a feeding channel;

[0010] The gas filtering component includes a box body installed on the left outer wall of the fixed mold by screws, a hemispherical box is integrally arranged on the left side of the box body, the hemispherical box is connected to the pipeline, and an impeller is rotatably connected inside the hemispherical box, a de-impurity screen plate for filtering gas impurities is provided on the right side of the impeller, a filter screen for ventilation is provided on the right side of the de-impurity screen plate, a sealing plate for sealing is provided on the filter screen, a bottom cover mechanism is installed around the bottom of the filter screen, the impeller and the bottom cover mechanism are linked by an adjusting arm, and a driving mechanism located inside the box body is provided on the front and rear sides of the de-impurity screen plate.

[0011] A wedge frame is arranged on the top of the blocking block on the left side, and the wedge frame is composed of a straight plate and a wedge plate, wherein the wedge plates include two, which are arranged on the top of the straight plate in a front-to-back symmetrical manner, and the straight plate is fixedly connected to the corresponding blocking block by screws;

[0012] The box body is located on the left side of the vacuum channel and is used for covering the vacuum channel.

[0013] The blocking mechanism includes a bottom plate located below the mold body, the bottom plate and the fixed mold are supported by a support column, and a swing arm is movably connected to the top of the bottom plate, and both ends of the swing arm are movably connected to a splicing rod, and the top ends of the plurality of splicing rods respectively penetrate the corresponding through holes and are installed on the corresponding blocking blocks, and a limit ring for limiting is threadedly connected to the splicing rod;

[0014] The support columns include four, which are fixedly connected to the four corners of the top of the bottom plate by screws, and the top ends of the support columns are fixedly connected to the bottom outer wall of the fixed mold by screws;

[0015] The swing arm is movably connected with a U-shaped frame via a pin shaft, the bottom of the U-shaped frame is fixedly connected to the top center of the bottom plate, both ends of the swing arm are provided with return grooves, the splicing rods are movably connected in the return grooves via a pin shaft, and an extrusion spring located on the bottom shell wall of the swing arm is installed directly below each of the splicing rods, and the bottom end of the extrusion spring is fixedly connected to the bottom plate.

[0016] The front and rear inner walls of the box body are integrally provided with L-shaped plates, and the arrangement of the two L-shaped plates forms a ventilation area and a working area inside the box body, wherein the working area includes two plates located on both sides of the ventilation area, and a partition located in the ventilation area is arranged between the two L-shaped plates, and the partition is used to enhance the stability of the internal space of the box body;

[0017] The impurity-removing mesh plate is located directly below the partition plate, and the bottom of the impurity-removing mesh plate passes through the bottom shell wall of the box body. An inspection opening is opened on the top shell wall of the box body, and an inspection plate is installed in the inspection opening through bolts.

[0018] A notch is provided on the bottom shell wall of the box body on the right side of the impurity removal screen plate, the filter screen is arranged in the notch, and the blocking plate is installed above the notch through a connecting shaft, wherein the two ends of the connecting shaft are respectively rotatably connected to the corresponding L-shaped plates, and a torsion spring is sleeved on the connecting shaft, and a wing plate for pressing the blocking plate is installed on the right shell wall of the impurity removal screen plate;

[0019] The impeller is composed of a transmission shaft and blades, wherein both ends of the transmission shaft respectively penetrate the corresponding side walls of the hemispherical box and are installed with end caps, and the blades include a plurality of blades, which are arranged on the circumferential wall of the transmission shaft along the circumferential direction, and the blades are located inside the hemispherical box, wherein a reciprocating thread is provided on the portion of the transmission shaft extending to the outside of the hemispherical box, and is threadedly connected with an inner groove ring, the inner groove ring is slidably connected to the box body, and the plurality of adjusting arms are respectively fixedly connected to the corresponding inner groove rings.

[0020] The two driving mechanisms are respectively arranged in the corresponding working areas, wherein the driving mechanism comprises guide rods symmetrically arranged inside the working area, a carrier plate is sleeved on the two guide rods, a return spring located on the corresponding guide rod is sleeved between the carrier plate and the left inner wall of the box body, a through slot is provided on the right shell wall of the L-shaped plate, an extension arm is movably connected in the through slot, the left end of the extension arm is fixedly connected to the corresponding carrier plate by bolts, the right side of the extension arm extends into the vacuum channel, and a contact rod is installed, the other end of the contact rod is movably in contact with the wedge frame, and an adjustment component for adjusting the impurity removal screen is provided on the left side of the carrier plate;

[0021] The other end of the contact rod is rollingly connected with a ball, and the ball is in rolling contact with the inclined surface of the wedge plate in the wedge frame.

[0022] The adjustment assembly includes a rotating shaft rotatably connected to the inner wall of the L-shaped plate through a bearing, and a gear and a cam are installed on the rotating shaft, wherein the cam is located at the end of the rotating shaft, and a rack meshing with the cam is provided below the cam, and the right end of the rack is fixedly connected to the corresponding carrier plate;

[0023] A passage groove is provided below the rotating shaft and is located on the corresponding side wall of the L-shaped plate. A convex rod is movably connected in the passage groove. One end of the convex rod is fixedly connected to the corresponding side wall of the impurity removal screen plate, and the other end of the convex rod is movably connected to a traction rod. The top of the traction rod is movably connected to the cam.

[0024] An annular groove is provided on the peripheral wall of the cam, a sliding block is slidably connected in the annular groove, and the top end of the cam is fixedly connected to the sliding block.

[0025] A cleaning piece for cleaning impurities is provided below the filter screen, and the cleaning piece includes sliding grooves opened on both sides of the filter screen, sliding blocks are slidably connected in the sliding grooves, and a cleaning plate for cleaning the filter screen is jointly installed at the bottom of the two sliding blocks, and auxiliary plates are installed on the front and rear side shell walls of the cleaning plate, and an inclined groove is opened on the auxiliary plate, and a sliding rod is slidably connected in the inclined groove.

[0026] The bottom cover mechanism is composed of a bottom cover and a vibration component, wherein the bottom cover includes a cover body installed on the outer wall of the bottom of the box body by screws, and movement rods are movably connected to the front and rear side shell walls of the cover body. One end of the movement rod extending into the interior of the cover body is fixedly connected to the corresponding sliding rod, and the other end of the movement rod is fixedly connected to the corresponding adjustment arm by screws.

[0027] The vibration assembly includes a sub-frame located on the outer walls of the front and rear sides of the cover body, the sub-frame is movably connected with a bending rod, the right ends of multiple bending rods are commonly connected to an integration plate, multiple knocking rods located on the integration plate are arranged between two bending rods, and the knocking rods are used to knock the corresponding side walls of the cover body, a vibration spring located on the corresponding bending rod is sleeved between each of the sub-frames and the integration plate, and an extrusion frame located on the corresponding adjustment arm is arranged on the left side of each of the bending rods, wherein a spherical ball is rollingly connected to the left end of the bending rod, and the spherical ball is in rolling contact with the corresponding extrusion frame.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. By adding a gas filter component to the mold body, the gas sucked in during vacuum suction of the mold cavity can be filtered, and as the vacuum channel is blocked, the impurity removal screen in the gas filter component slides out, and the impurity removal screen is automatically cleaned with the help of the suction effect of the negative pressure suction equipment, thereby filtering the sucked gas and avoiding frequent replacement and maintenance of the filter structure, reducing the burden on staff, reducing maintenance costs, and ensuring product production efficiency.

[0030] 2. By setting a wedge-shaped frame on the blocking block in the vacuum channel, when the blocking block moves upward, the wedge-shaped frame is driven to move upward synchronously, thereby pushing and applying force to the driving mechanism in the gas filter component, so as to realize the sliding out of the impurity removal screen, and open the blocking plate, so that the filter is in a conductive state. At this time, the suction wind direction of the negative pressure suction equipment in the mold body is sucked into the impurity removal screen that slides out, and the airflow enters the gas filter component after passing through the filter. At this time, the impurities adsorbed on the impurity removal screen are blown out by the gas, so as to realize the automatic impurity removal of the impurity removal screen.

[0031] 3. When the impurity removal screen is removing impurities, the cleaned impurities enter the interior of the bottom cover mechanism, and the airflow disturbance generated by the negative pressure suction causes the impeller to rotate, driving the adjustment rod to perform reciprocating displacement activities, and then driving the cleaning plate in the bottom cover mechanism to perform reciprocating activities, thereby cleaning the filter screen and preventing it from being blocked.

[0032] 4. When the impeller drives the adjusting arm to move, it synchronously drives the vibration component in the bottom cover mechanism to move, thereby knocking and vibrating the impurities that fall into the bottom cover. If the impurity removal screen slides out at this time, the movement of the vibration component further accelerates the cleaning of the impurity removal screen. If the impurity removal screen fails to slide out at this time, the movement of the vibration component facilitates the impurities in the bottom cover to slide and be cleaned.

[0033] 5. By setting up a sealing mechanism, the activities of the two sealing blocks in the mold body can be adjusted to ensure the vacuum treatment inside the mold cavity. The sealing mechanism and the two sealing blocks in the mold body can be disassembled, and a limit ring is threadedly connected on the splicing rod connecting the sealing block of the mold body in the sealing mechanism, so as to facilitate its use on different mold bodies, thereby improving the applicability of the product.

[0034] 6. Multiple mold bodies are loaded in series on the same negative pressure suction device and equipped with a control valve. In actual use, the number of mold bodies used can be controlled according to the switch of the control valve, replacing the vacuum suction equipment separately configured in the existing products, further reducing the layout cost of the product and facilitating the promotion and use of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the three-dimensional structure of a die-casting mold cavity vacuum system Figure 1 ;

[0036] Figure 2 A schematic diagram of the three-dimensional structure of a die-casting mold cavity vacuum system Figure 2 ;

[0037] Figure 3 for Figure 1 A schematic diagram of a longitudinal cross-sectional structure;

[0038] Figure 4 for Figure 3 A schematic diagram of the enlarged local structure at A;

[0039] Figure 5 for Figure 3 A schematic diagram of the front view structure of

[0040] Figure 6 for Figure 5 A schematic diagram of the enlarged local structure at B;

[0041] Figure 7 for Figure 2 A schematic diagram of the structure of a gas filter component;

[0042] Figure 8 for Figure 7 A schematic diagram of the structure viewed from above;

[0043] Fig. 9 for Figure 7 A schematic diagram of a partial cross-sectional structure;

[0044] Fig.10 for Fig. 9 A schematic diagram of the enlarged local structure at C;

[0045] Fig.11 for Fig. 9 Axonometric structural diagram of ;

[0046] Fig.12 for Fig.11 Schematic diagram of the structure viewed from above;

[0047] Fig.13 for Fig.12 A schematic diagram of the enlarged local structure at D;

[0048] Fig.14 for Fig. 9 Schematic diagram of the structure viewed from above;

[0049] Fig.15 for Fig.14 A magnified schematic diagram of the local structure at E;

[0050] Fig.16 for Fig. 9 Schematic diagram of the structure of the impurity removal screen plate and the adjustment component;

[0051] Fig.17 This is a distribution diagram of the mold body and negative pressure suction equipment of a die-casting mold cavity vacuum extraction system.

[0052] In the figure: 1. mold body; 11. fixed mold; 12. movable mold; 13. blocking block; 2. blocking mechanism; 21. bottom plate; 22. support column; 23. swing arm; 24. splicing rod; 25. limit ring; 3. gas filter component; 31. box body; 32. hemispherical box; 33. L-shaped plate; 34. partition; 35. driving mechanism; 351. guide rod; 352. carrier plate; 353. extension arm; 354. contact rod; 355. adjustment component; 3551. rack; 3552. gear; 3553. 553. Cam; 3554. Traction rod; 36. De-dusting screen plate; 37. Filter screen; 38. Sealing plate; 39. Bottom cover mechanism; 391. Bottom cover; 3911. Cover body; 3912. Moving rod; 392. Vibration assembly; 3921. Integration plate; 3922. Knocking rod; 3923. Bending rod; 3924. Extrusion frame; 310. Impeller; 311. Adjusting arm; 312. Wing plate; 313. Cleaning piece; 3131. Cleaning plate; 3132. Sub-plate; 4. Negative pressure suction equipment. DETAILED DESCRIPTION

[0053] See also Figure 1 , Figure 2 and Fig.17In an embodiment of the present invention, a die-casting mold cavity vacuum system includes a plurality of mold bodies 1 having a mold cavity and a negative pressure suction device 4 for negative pressure suction, wherein the mold body 1 and the negative pressure suction device 4 are connected through a pipeline. The pipeline is composed of a main pipe and a branch pipe, wherein the main pipe is loaded on the negative pressure suction device 4, and the branch pipe includes a plurality of branches for connecting a plurality of mold bodies 1 with the main pipe, and each branch pipe is provided with a control valve.

[0054] See also Figure 3-Figure 6 In the embodiment of the present invention, a plugging mechanism 2 is provided at the bottom of each mold body 1, and a gas filter component 3 for connecting a pipeline is installed on the side wall of the mold body 1. The mold body 1 includes a fixed mold 11 and a movable mold 12 that are molded together. After the fixed mold 11 and the movable mold 12 are molded together, a mold cavity for die-casting of a workpiece is formed inside.

[0055] Among them, the inner walls on both sides of the fixed mold 11 are provided with receiving grooves, and the blocking blocks 13 are slidably connected in the receiving grooves, and the bottom shell wall of the receiving grooves is provided with through holes. The setting of the receiving grooves facilitates the configuration of the blocking blocks 13, and then the blocking operation of the mold cavity space is realized through the movement of the blocking blocks 13.

[0056] A rectangular channel penetrating the corresponding side wall of the fixed mold 11 is provided at the top of the left receiving groove to serve as a vacuum channel. The provision of the vacuum channel facilitates the evacuation of the interior of the mold cavity. A notch penetrating the corresponding side wall of the fixed mold 11 is provided at the top of the right receiving groove to serve as a feed channel. The provision of the feed channel facilitates the pouring of molten metal.

[0057] The blocking mechanism 2 includes a bottom plate 21 located below the mold body 1, the bottom plate 21 and the fixed mold 11 are supported by support columns 22, and the top of the bottom plate 21 is movably connected to a swing arm 23. The support columns 22 include four, which are fixedly connected to the top four corners of the bottom plate 21 by screws, and the top of the support column 22 is fixedly connected to the bottom outer wall of the fixed mold 11 by screws.

[0058] Both ends of the swing arm 23 are movably connected with a splicing rod 24, and the top ends of the plurality of splicing rods 24 respectively pass through the corresponding through holes and are installed on the corresponding blocking blocks 13, and a limiting ring 25 for limiting is threadedly connected to the splicing rod 24. The setting of the limiting ring 25 on the splicing rod 24 is to facilitate the pairing of the blocking mechanism 2 with different mold bodies 1, and then flexibly adjust the position of the limiting ring 25 on the splicing rod 24 when the blocking mechanism 2 and the mold body 1 are assembled before the product is used.

[0059] The swing arm 23 is movably connected with a U-shaped frame through a pin shaft, and the bottom of the U-shaped frame is fixedly connected to the top center of the bottom plate 21. Both ends of the swing arm 23 are provided with return grooves, and the splicing rod 24 is movably connected to the return grooves through a pin shaft. The setting of the return groove ensures the stability of the splicing rod 24 during the lifting and lowering adjustment.

[0060] A compression spring located on the bottom wall of the swing arm 23 is installed directly below each splicing rod 24, and the bottom end of the compression spring is fixedly connected to the bottom plate 21. The left compression spring of the two sides is more elastic than the right compression spring, and thus under normal circumstances, the swing arm 23 is in a state where the left end is low and the right end is high.

[0061] See also Figure 7-Figure 8 In the embodiment of the present invention, the gas filter component 3 includes a box body 31 which is installed on the left outer wall of the fixed mold 11 by screws. The box body 31 is designed with both ends open.

[0062] A hemispherical box 32 is integrally provided on the left side of the box body 31 , the inner cavity of the hemispherical box 32 is communicated with the inner cavity of the box body 31 , and an air outlet pipe is provided on the hemispherical box 32 , and the air outlet pipe is connected to the pipeline.

[0063] The impeller 310 is rotatably connected inside the hemispherical box 32, and a cleaning screen 36 for filtering gas impurities is provided on the right side of the impeller 310. A filter screen 37 for ventilation is provided on the right side of the cleaning screen 36, and a sealing plate 38 for sealing is provided on the filter screen 37. The sealing plate 38 is set in a closed state when the cleaning screen 36 does not leave the box body 31, thereby realizing the vacuum treatment of the mold cavity in the mold body 1, and when the cleaning screen 36 is cleaned, it moves down to squeeze the sealing plate 38 to open it, so as to facilitate the flow of external gas into the interior of the box body 31.

[0064] A bottom cover mechanism 39 is installed around the bottom of the filter screen 37, and the impeller 310 and the bottom cover mechanism 39 are linked by an adjustment arm 311. The front and rear sides of the impurity removal screen plate 36 are both provided with a driving mechanism 35 located inside the box body 31. The position of the impurity removal screen plate 36 is adjusted by the movement of the driving mechanism 35.

[0065] See also Figure 3 , Figure 7 and Figure 8 In the embodiment of the present invention, a wedge frame is provided on the top of the left blocking block 13. The wedge frame is composed of a straight plate and a wedge plate. There are two wedge plates, which are symmetrically arranged on the top of the straight plate, and the straight plate is fixedly connected to the corresponding blocking block 13 by screws. The two wedge plates correspond to the corresponding driving mechanisms 35, respectively, so as to ensure the stability of the impurity removal screen plate 36 when adjusting.

[0066] The box body 31 is located on the left side of the vacuum channel and is used to cover the vacuum channel, thereby ensuring the vacuum treatment of the mold cavity in the mold body 1.

[0067] See also Fig. 9 , Fig.10 and Fig.16 In the embodiment of the present invention, L-shaped plates 33 are integrally provided on the inner walls of the front and rear sides of the box body 31. The provision of the two L-shaped plates 33 forms a ventilation area and a working area inside the box body 31. Among them, there are two working areas, which are located on both sides of the ventilation area. The ventilation area is used for the flow of gas, and the working area is used for the configuration of the structure.

[0068] A partition plate 34 located in the ventilation area is provided between the two L-shaped plates 33 , and the partition plate 34 is used to enhance the stability of the inner space of the box body 31 .

[0069] The impurity removal screen plate 36 is located directly below the partition plate 34, and the bottom of the impurity removal screen plate 36 penetrates the bottom shell wall of the box body 31. Then the impurity removal screen plate 36 can leave the box body 31 from the bottom of the box body 31. An inspection port is opened on the top shell wall of the box body 31, and an inspection plate is installed in the inspection port by bolts.

[0070] A notch is provided on the right side of the impurity removal screen plate 36, and a filter screen 37 is disposed in the notch. The filter screen 37 can be disposed in the notch in various ways, and in this embodiment, it is installed by bolt connection. The configuration of the filter screen 37 is to prevent the impurities cleaned from entering the interior of the box body 31 when the impurity removal screen plate 36 is cleaned.

[0071] The blocking plate 38 is installed above the gap through a connecting shaft. The two ends of the connecting shaft are rotatably connected to the corresponding L-shaped plate 33, and a torsion spring is sleeved on the connecting shaft. The configuration of the torsion spring allows the blocking plate 38 to reset itself without the action of external force, thereby achieving the cover and shielding of the gap.

[0072] A wing plate 312 for pressing the blocking plate 38 is installed on the right shell wall of the impurity removal mesh plate 36. The configuration of the wing plate 312 applies force to press the blocking plate 38 when the impurity removal mesh plate 36 moves downward, thereby realizing the opening of the blocking plate 38 synchronously.

[0073] See also Fig.11 In the embodiment of the present invention, the impeller 310 is composed of a transmission shaft and blades. The two ends of the transmission shaft respectively penetrate the corresponding side walls of the hemispherical box 32 and are equipped with end caps. The configuration of the end caps can prevent the inner ring from being separated from the transmission shaft.

[0074] The blades include a plurality of blades, which are arranged on the peripheral wall of the transmission shaft along the circumferential direction, and the blades are located inside the hemispherical box 32. The arrangement of the blades enables the impeller 310 to rotate when the airflow moves inside the box body 31. Among them, a reciprocating thread is provided on the portion of the transmission shaft extending to the outside of the hemispherical box 32, and an inner groove ring is threadedly connected. The inner groove ring is slidably connected to the box body 31, and a guide groove is provided on the left shell wall of the box body 31. A guide block is slidably connected in the guide groove, and the side of the guide block away from the guide groove is fixedly connected to the corresponding inner groove ring. A plurality of adjustment arms 311 are respectively fixedly connected to the corresponding inner groove rings.

[0075] See also Figure 11-Figure 12 In the embodiment of the present invention, two driving mechanisms 35 are respectively arranged in corresponding working areas. The driving mechanism 35 includes guide rods 351 symmetrically arranged inside the working area. A carrier plate 352 is sleeved on the two guide rods 351, and a reset spring located on the corresponding guide rod 351 is sleeved between the carrier plate 352 and the left inner wall of the box body 31. The setting of the reset spring enables the carrier plate 352 to perform reset movement without the action of external force. The setting of the two guide rods 351 ensures the stability of the displacement movement of the carrier plate 352.

[0076] A through slot is provided on the right side shell wall of the L-shaped plate 33, and an extension arm 353 is movably connected in the through slot. The left end of the extension arm 353 is fixedly connected to the corresponding carrier plate 352 by bolts.

[0077] The right side of the extension arm 353 extends into the vacuum channel and is provided with a contact rod 354. The other end of the contact rod 354 is in active contact with the wedge frame. The left side of the carrier plate 352 is provided with an adjustment assembly 355 for adjusting the impurity removal screen plate 36.

[0078] The other end of the contact rod 354 is rollingly connected with a ball, and the ball rolls and contacts with the inclined surface of the wedge plate in the wedge frame. As the wedge frame moves upward, the inclined surface of the inclined plate on it moves and contacts with the contact rod 354, so that the contact rod 354 is forced to move, and then the carrier plate 352 is driven to move through the extension arm 353, so as to realize the movement of the adjustment component 355.

[0079] See also Fig.11 , Fig.12 and Fig.16 In the embodiment of the present invention, the adjustment assembly 355 includes a rotating shaft rotatably connected to the inner wall of the L-shaped plate 33 through a bearing. A gear 3552 and a cam 3553 are mounted on the rotating shaft. The cam 3553 is located at the end of the rotating shaft, and a rack 3551 meshing with the cam 3553 is provided below the cam 3553. The right end of the rack 3551 is fixedly connected to the corresponding carrier plate 352.

[0080] When the rack 3551 moves, the gear 3552 meshing therewith moves synchronously, and the gear 3552 drives the cam 3553 to move synchronously with the rotating shaft when moving.

[0081] A passage groove is provided below the rotating shaft on the corresponding side wall of the L-shaped plate 33, and a protruding rod is movably connected in the passage groove. One end of the protruding rod is fixedly connected to the corresponding side wall of the impurity removal screen 36, and the other end of the protruding rod is movably connected to a traction rod 3554. The top of the traction rod 3554 is movably connected to the cam 3553. During the rotational movement, the cam 3553 cooperates with the traction rod 3554 to achieve the lifting and lowering adjustment of the impurity removal screen 36.

[0082] An annular groove is provided on the peripheral wall of the cam 3553, a slider is slidably connected in the annular groove, and the top end of the cam 3553 is fixedly connected to the slider.

[0083] See also Figure 12-Figure 15 In the embodiment of the present invention, a cleaning member 313 for cleaning impurities is provided below the filter 37. The cleaning member 313 includes sliding grooves provided on both sides of the filter 37. Sliding blocks are slidably connected in the sliding grooves, and a cleaning plate 3131 for cleaning the filter 37 is installed at the bottom of the two sliding blocks. The cleaning plate 3131 has various styles, and in this embodiment, a brush structure is used to achieve efficient cleaning of the filter 37.

[0084] Sub-plates 3132 are installed on the front and rear side shell walls of the cleaning plate 3131. The sub-plates 3132 are provided with inclined grooves, and a sliding rod is slidably connected in the inclined grooves.

[0085] The bottom cover mechanism 39 is composed of a bottom cover 391 and a vibration assembly 392. Among them, the bottom cover 391 includes a cover body 3911 installed on the outer wall of the bottom of the box body 31 by screws. The bottom of the cover body 3911 adopts an inclined design to facilitate the falling of impurities. The front and rear side shell walls of the cover body 3911 are movably connected with a moving rod 3912. One end of the moving rod 3912 extending into the inside of the cover body 3911 is fixedly connected to the corresponding sliding rod, and the other end of the moving rod 3912 is fixedly connected to the corresponding adjustment arm 311 by screws. When the adjustment arm 311 moves back and forth, the sliding rod is driven to move in the inclined groove by the moving rod 3912, thereby realizing the reciprocating displacement movement of the cleaning plate 3131.

[0086] The vibration assembly 392 includes a sub-frame located on the front and rear outer walls of the cover body 3911. The sub-frame is movably connected with a bending rod 3923, and the right ends of the plurality of bending rods 3923 are commonly connected with an integration plate 3921. A plurality of knocking rods 3922 located on the integration plate 3921 are arranged between the two bending rods 3923, and the knocking rods 3922 are used to knock the corresponding side walls of the cover body 3911. The movement of the integration plate 3921 causes the plurality of knocking rods 3922 to move synchronously, thereby realizing knocking vibration of the cover body 3911.

[0087] A vibration spring located on the corresponding bending rod 3923 is sleeved between each sub-frame and the integration plate 3921. An extrusion frame 3924 located on the corresponding adjustment arm 311 is provided on the left side of each bending rod 3923. Among them, a ball is rollingly connected to the left end of the bending rod 3923, and the ball is in rolling contact with the corresponding extrusion frame 3924. When the adjustment arm 311 reciprocates, the extrusion frame 3924 moves synchronously, and then when the extrusion frame 3924 contacts the corresponding bending rod 3923, the integration plate 3921 generates a vibration effect. If the impurity removal screen plate 36 is not cleaned, the activity of the vibration component 392 further facilitates the cleaning of impurities adhering to the cover body 3911.

[0088] If the use environment of the device is in good condition, there is no need to set a filtering structure in the air inlet direction of the impurity removal screen plate 36 during cleaning. If the use environment of the device is in poor condition, a filtering structure needs to be set in the air inlet direction of the impurity removal screen plate 36 during cleaning, so as to prevent impurities in the absorbed gas from adhering to the other side of the impurity removal screen plate 36 and affecting the subsequent use of the impurity removal screen plate 36. The filtering structure is diverse, and a filter screen structure can be directly used.

[0089] The working principle of the present invention is: when the product is in use, the corresponding control valve on the pipeline connected to the negative pressure suction device 4 is switched on and off on the external controller according to the number of mold bodies 1 to be used, so as to ensure that the mold cavity of the mold body 1 to be used is vacuumed when the workpiece is die-cast.

[0090] First, the mold body 1 to be used is closed, and under the action of the extrusion springs set on both sides of the blocking mechanism 2, the swing arm 23 is adjusted to be lower on the left and higher on the right. With the movement of the swing arm 23, the corresponding splicing rod 24 connected to it moves synchronously, so that the two blocking blocks 13 in the fixed mold 11 in the mold body 1 are lower on the left and higher on the right. Then the blocking block 13 on the left does not block the vacuum channel, while the blocking block 13 on the right blocks the corresponding receiving groove, so that the mold cavity of the mold body 1 can be vacuumed.

[0091] At this time, due to the opening of the control valve, the mold cavity of the current mold body 1 is vacuumed. The gas in the mold cavity of the mold body 1 enters the corresponding gas filter component 3 from the vacuum channel under the suction effect. After entering the gas filter component 3, the gas is filtered by the impurity removal mesh plate 36, and then blows the impeller 310 to rotate and enter the pipeline.

[0092] After the vacuum treatment of the mold cavity in the mold body 1 is completed, the molten metal is poured from the feed channel into the mold body 1 after the mold is closed. After the molten metal is poured from the feed channel, it applies pressure to the corresponding blocking block 13, so that the corresponding blocking block 13 moves downward. After the blocking block 13 moves downward, the molten metal enters the mold cavity of the mold body 1 at that location.

[0093] When the blocking block 13 is forced to move downward, the corresponding splicing rod 24 on it moves downward. When the splicing rod 24 moves downward, it presses the swing arm 23 and compresses the extrusion spring there. When the swing arm 23 is pried by force, its other end rises, stretching the extrusion spring there, and the corresponding blocking block 13 moves upward through the corresponding splicing rod 24. After the blocking block 13 moves upward, the vacuum channel is blocked, thereby preventing the molten metal from entering the vacuum channel.

[0094] When the blocking block 13 at this location moves upward, it simultaneously drives the wedge frame arranged thereon to move upward, and the wedge frame pushes the contact rod 354 of the driving mechanism 35 in the gas filtering component 3 during the upward movement.

[0095] After the contact rod 354 is stressed, it drives the displacement of the carrier plate 352 in the corresponding driving mechanism 35 through the corresponding extension arm 353, compressing the reset spring. The carrier plate 352 drives the rack 3551 in the adjustment assembly 355 to move during the movement. The gear 3552 meshing with the rack 3551 rotates during the displacement, thereby driving the corresponding rotating shaft to move. When the rotating shaft rotates 180 degrees, the cam 3553 moves synchronously, and then drives the impurity removal screen plate 36 to move downward under the action of the traction rod 3554, so that it passes through the bottom of the box body 31.

[0096] When the impurity removing screen plate 36 reaches the outside of the box body 31, it is located at the opening of the bottom cover mechanism 39. When the impurity removing screen plate 36 moves downward, the wing plate 312 thereon squeezes the blocking plate 38 to make it tilt, thereby opening the blocking of the gap.

[0097] At this time, during negative pressure suction, the gas enters the bottom cover mechanism 39 from the left side of the impurity removal mesh plate 36. The entry of the gas blows out and cleans the impurities adhering to the impurity removal mesh plate 36. The gas enters the interior of the gas filter component 3 through the filter screen 37, blows the impeller 310, and then enters the pipeline again.

[0098] During the movement of the impeller 310, the inner ring threadedly connected thereto moves back and forth, thereby driving the corresponding adjustment arm 311 to move back and forth. When the adjustment arm 311 moves, the movement rod 3912 of the bottom cover 391 in the bottom cover mechanism 39 moves back and forth, thereby driving the cleaning member 313 to move, and cleaning the impurities adhered to the filter screen 37 to prevent it from being blocked. When the adjustment arm 311 moves, it simultaneously drives the extrusion frame 3924 in the vibration component 392 to move synchronously, and then the corresponding bending rod 3923 in contact with it drives the integration plate 3921 to move, thereby knocking the cover body 3911 through the knocking rod 3922, thereby accelerating the cleaning of impurities on the impurity removal screen plate 36 on the one hand, and facilitating the cleaning of impurities on the cover body 3911 on the other hand.

[0099] The above are only preferred specific implementation modes 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 solutions and inventive concepts 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 die-casting mold cavity vacuum pumping system, comprising a plurality of mold bodies (1) having a mold cavity and a negative pressure suction device (4) for negative pressure suction, wherein: The mold body (1) is connected to the negative pressure suction device (4) through a pipeline, and is characterized in that: a sealing mechanism (2) is provided at the bottom of each mold body (1), and a gas filter component (3) for connecting the pipeline is installed on the side wall of the mold body (1), and the mold body (1) comprises a fixed mold (11) and a movable mold (12) for upper and lower mold clamping, wherein a receiving groove is provided on the inner walls of both sides of the fixed mold (11), a sealing block (13) is slidably connected in the receiving groove, and a through hole is provided on the bottom shell wall of the receiving groove, a rectangular channel penetrating the corresponding side wall of the fixed mold (11) is provided at the top of the left receiving groove to serve as a vacuum channel, and a notch penetrating the corresponding side wall of the fixed mold (11) is provided at the top of the right receiving groove, and the notch is used to serve as a feeding channel; The gas filter component (3) comprises a box body (31) mounted on the left outer wall of the fixed mold (11) by screws, a hemispherical box (32) is integrally arranged on the left side of the box body (31), the hemispherical box (32) is connected to a pipeline, and an impeller (310) is rotatably connected inside the hemispherical box (32), a de-impurity screen (36) for filtering gas impurities is arranged on the right side of the impeller (310), a filter screen (37) for ventilation is arranged on the right side of the de-impurity screen (36), a sealing plate (38) for sealing is arranged on the filter screen (37), a bottom cover mechanism (39) is installed around the bottom of the filter screen (37), the impeller (310) and the bottom cover mechanism (39) are linked by an adjusting arm (311), and a driving mechanism (35) located inside the box body (31) is arranged on the front and rear sides of the de-impurity screen (36).

2. A die-casting mold cavity vacuum extraction system according to claim 1, characterized in that: A wedge frame is arranged on the top of the blocking block (13) on the left side, and the wedge frame is composed of a straight plate and a wedge plate, wherein the wedge plates include two, which are symmetrically arranged on the top of the straight plate in front and back, and the straight plate is fixedly connected to the corresponding blocking block (13) by screws; The box body (31) is located on the left side of the vacuum channel and is used to cover the vacuum channel.

3. A die-casting mold cavity vacuum extraction system according to claim 1, characterized in that: The blocking mechanism (2) comprises a bottom plate (21) located below the mold body (1), the bottom plate (21) and the fixed mold (11) are supported by a support column (22), and the top of the bottom plate (21) is movably connected to a swing arm (23), and both ends of the swing arm (23) are movably connected to a splicing rod (24), the top ends of the plurality of splicing rods (24) respectively pass through corresponding through holes and are installed on corresponding blocking blocks (13), and a limiting ring (25) for limiting position is threadedly connected to the splicing rod (24); The support columns (22) include four columns, which are fixedly connected to the four corners of the top of the bottom plate (21) by screws, and the top ends of the support columns (22) are fixedly connected to the bottom outer wall of the fixed mold (11) by screws; The swing arm (23) is movably connected to a U-shaped frame via a pin shaft, the bottom of the U-shaped frame is fixedly connected to the top center of the bottom plate (21), both ends of the swing arm (23) are provided with return grooves, the splicing rods (24) are movably connected to the return grooves via a pin shaft, and a compression spring located on the bottom shell wall of the swing arm (23) is installed directly below each splicing rod (24), and the bottom end of the compression spring is fixedly connected to the bottom plate (21).

4. A die-casting mold cavity vacuum extraction system according to claim 2, characterized in that: L-shaped plates (33) are integrally arranged on the front and rear inner walls of the box body (31), and the arrangement of the two L-shaped plates (33) forms a ventilation area and a working area inside the box body (31), wherein the working area includes two plates located on both sides of the ventilation area, and a partition plate (34) located in the ventilation area is arranged between the two L-shaped plates (33), and the partition plate (34) is used to enhance the stability of the internal space of the box body (31); The impurity removing mesh plate (36) is located directly below the partition plate (34), and the bottom of the impurity removing mesh plate (36) passes through the bottom shell wall of the box body (31). An inspection opening is provided on the top shell wall of the box body (31), and an inspection plate is installed in the inspection opening by means of bolts.

5. A die-casting mold cavity vacuum extraction system according to claim 4, characterized in that: A notch is provided on the right side of the impurity removal screen plate (36) and is located on the bottom shell wall of the box body (31). The filter screen (37) is arranged in the notch. The blocking plate (38) is installed above the notch via a connecting shaft, wherein both ends of the connecting shaft are rotatably connected to corresponding L-shaped plates (33) respectively, and a torsion spring is sleeved on the connecting shaft. A wing plate (312) for pressing the blocking plate (38) is installed on the right shell wall of the impurity removal screen plate (36); The impeller (310) is composed of a transmission shaft and blades, wherein two ends of the transmission shaft respectively penetrate the corresponding side walls of the hemispherical box (32) and are installed with end caps, and the blades include a plurality of blades, which are arranged on the peripheral wall of the transmission shaft along the circumferential direction, and the blades are located inside the hemispherical box (32), wherein a reciprocating thread is provided on the portion of the transmission shaft extending to the outside of the hemispherical box (32), and is threadedly connected to an inner groove ring, and the inner groove ring is slidably connected to the box body (31), and the plurality of adjustment arms (311) are respectively fixedly connected to the corresponding inner groove rings.

6. A die-casting mold cavity vacuum extraction system according to claim 4, characterized in that: The two driving mechanisms (35) are respectively arranged in corresponding working areas, wherein the driving mechanism (35) comprises guide rods (351) symmetrically arranged inside the working area, a carrier plate (352) is commonly sleeved on the two guide rods (351), a return spring located on the corresponding guide rod (351) is sleeved between the carrier plate (352) and the left inner wall of the box body (31), a through groove is opened on the right shell wall of the L-shaped plate (33), an extension arm (353) is movably connected in the through groove, the left end of the extension arm (353) is fixedly connected to the corresponding carrier plate (352) by bolts, the right side of the extension arm (353) extends into the vacuum channel, and a contact rod (354) is installed, the other end of the contact rod (354) is movably contacted with the wedge frame, and an adjustment component (355) for adjusting the impurity removal screen plate (36) is provided on the left side of the carrier plate (352); The other end of the contact rod (354) is rollingly connected with a ball, and the ball is in rolling contact with the inclined surface of the wedge plate in the wedge frame.

7. A die-casting mold cavity vacuum extraction system according to claim 6, characterized in that: The adjustment assembly (355) comprises a rotating shaft rotatably connected to the inner wall of the L-shaped plate (33) through a bearing, and a gear (3552) and a cam (3553) are mounted on the rotating shaft, wherein the cam (3553) is located at the end of the rotating shaft, and a rack (3551) meshing with the cam (3553) is provided below the cam (3553), and the right end of the rack (3551) is fixedly connected to the corresponding carrier plate (352); A passage groove is provided below the rotating shaft and is located on the corresponding side wall of the L-shaped plate (33). A convex rod is movably connected in the passage groove. One end of the convex rod is fixedly connected to the corresponding side wall of the impurity removal screen plate (36), and the other end of the convex rod is movably connected to a traction rod (3554). The top of the traction rod (3554) is movably connected to the cam (3553). An annular groove is provided on the peripheral wall of the cam (3553), a sliding block is slidably connected in the annular groove, and the top end of the cam (3553) is fixedly connected to the sliding block.

8. The die-casting mold cavity vacuum extraction system according to claim 1, characterized in that: A cleaning member (313) for cleaning impurities is provided below the filter screen (37), the cleaning member (313) comprising sliding grooves opened on both sides of the filter screen (37), sliding blocks slidably connected in the sliding grooves, a cleaning plate (3131) for cleaning the filter screen (37) being installed at the bottom of the two sliding blocks, auxiliary plates (3132) being installed on the front and rear side shell walls of the cleaning plate (3131), an inclined groove being opened on the auxiliary plate (3132), and a sliding rod being slidably connected in the inclined grooves.

9. A die-casting mold cavity vacuum extraction system according to claim 8, characterized in that: The bottom cover mechanism (39) is composed of a bottom cover (391) and a vibration assembly (392), wherein the bottom cover (391) includes a cover body (3911) mounted on the bottom outer wall of the box body (31) by screws, and movement rods (3912) are movably connected to the front and rear side shell walls of the cover body (3911), and one end of the movement rod (3912) extending into the inside of the cover body (3911) is fixedly connected to the corresponding sliding rod, and the other end of the movement rod (3912) is fixedly connected to the corresponding adjustment arm (311) by screws.

10. A die-casting mold cavity vacuum extraction system according to claim 9, characterized in that: The vibration assembly (392) includes a sub-frame located on the front and rear outer walls of the cover body (3911), the sub-frame is movably connected with a bending rod (3923), the right ends of the plurality of bending rods (3923) are commonly connected with an integration plate (3921), a plurality of knocking rods (3922) located on the integration plate (3921) are arranged between two bending rods (3923), and the knocking rods (3922) are used to knock the corresponding side walls of the cover body (3911), a vibration spring located on the corresponding bending rod (3923) is sleeved between each of the sub-frames and the integration plate (3921), and an extrusion frame (3924) located on the corresponding adjustment arm (311) is arranged on the left side of each of the bending rods (3923), wherein a ball is rollingly connected to the left end of the bending rod (3923), and the ball is in rolling contact with the corresponding extrusion frame (3924).

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